Fixed bug of long strings in binary chunks

When "undumping" a long string, the function 'LoadVector' can call the
reader function, which can run the garbage collector, which can collect
the string being read. So, the string must be anchored during the call
to 'LoadVector'. (This commit also fixes the identation in 'l_alloc'.)

.gitignore

@@ -11,5 +11,3 @@ testes/time-debug.txt
 
 testes/libs/all
 
-temp
-lua

README.md

@@ -1,7 +0,0 @@
-# Lua
-
-This is the repository of Lua development code, as seen by the Lua team. It contains the full history of all commits but is mirrored irregularly. For complete information about Lua, visit [Lua.org](https://www.lua.org/).
-
-Please **do not** send pull requests. To report issues, post a message to the [Lua mailing list](https://www.lua.org/lua-l.html).
-
-Download official Lua releases from [Lua.org](https://www.lua.org/download.html).

all

@@ -1,8 +1,6 @@
-make -s -j
-cd testes/libs; make -s
-cd ..     # back to directory 'testes'
-ulimit -S -s 1000
-if { ../lua -W all.lua; } then
+cd testes
+ulimit -S -s 2000
+if { ../lua all.lua; } then 
   echo -e "\n\n    final OK!!!!\n\n"
 else
   echo -e "\n\n    >>>> BUG!!!!\n\n"

lapi.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h $
+** $Id: lapi.h,v 2.9.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */
@@ -11,39 +11,14 @@
 #include "llimits.h"
 #include "lstate.h"
 
-
-/* Increments 'L->top', checking for stack overflows */
 #define api_incr_top(L)   {L->top++; api_check(L, L->top <= L->ci->top, \
 				"stack overflow");}
 
-
-/*
-** If a call returns too many multiple returns, the callee may not have
-** stack space to accommodate all results. In this case, this macro
-** increases its stack space ('L->ci->top').
-*/
 #define adjustresults(L,nres) \
-    { if ((nres) <= LUA_MULTRET && L->ci->top < L->top) L->ci->top = L->top; }
+    { if ((nres) == LUA_MULTRET && L->ci->top < L->top) L->ci->top = L->top; }
 
-
-/* Ensure the stack has at least 'n' elements */
 #define api_checknelems(L,n)	api_check(L, (n) < (L->top - L->ci->func), \
 				  "not enough elements in the stack")
 
 
-/*
-** To reduce the overhead of returning from C functions, the presence of
-** to-be-closed variables in these functions is coded in the CallInfo's
-** field 'nresults', in a way that functions with no to-be-closed variables
-** with zero, one, or "all" wanted results have no overhead. Functions
-** with other number of wanted results, as well as functions with
-** variables to be closed, have an extra check.
-*/
-
-#define hastocloseCfunc(n)	((n) < LUA_MULTRET)
-
-/* Map [-1, inf) (range of 'nresults') into (-inf, -2] */
-#define codeNresults(n)		(-(n) - 3)
-#define decodeNresults(n)	(-(n) - 3)
-
 #endif

lauxlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c $
+** $Id: lauxlib.c,v 1.289.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -27,12 +27,6 @@
 #include "lauxlib.h"
 
 
-#if !defined(MAX_SIZET)
-/* maximum value for size_t */
-#define MAX_SIZET	((size_t)(~(size_t)0))
-#endif
-
-
 /*
 ** {======================================================
 ** Traceback
@@ -46,8 +40,8 @@
 
 
 /*
-** Search for 'objidx' in table at index -1. ('objidx' must be an
-** absolute index.) Return 1 + string at top if it found a good name.
+** search for 'objidx' in table at index -1.
+** return 1 + string at top if find a good name.
 */
 static int findfield (lua_State *L, int objidx, int level) {
   if (level == 0 || !lua_istable(L, -1))
@@ -60,10 +54,10 @@ static int findfield (lua_State *L, int objidx, int level) {
         return 1;
       }
       else if (findfield(L, objidx, level - 1)) {  /* try recursively */
-        /* stack: lib_name, lib_table, field_name (top) */
-        lua_pushliteral(L, ".");  /* place '.' between the two names */
-        lua_replace(L, -3);  /* (in the slot occupied by table) */
-        lua_concat(L, 3);  /* lib_name.field_name */
+        lua_remove(L, -2);  /* remove table (but keep name) */
+        lua_pushliteral(L, ".");
+        lua_insert(L, -2);  /* place '.' between the two names */
+        lua_concat(L, 3);
         return 1;
       }
     }
@@ -82,12 +76,12 @@ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
   lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
   if (findfield(L, top + 1, 2)) {
     const char *name = lua_tostring(L, -1);
-    if (strncmp(name, LUA_GNAME ".", 3) == 0) {  /* name start with '_G.'? */
+    if (strncmp(name, "_G.", 3) == 0) {  /* name start with '_G.'? */
       lua_pushstring(L, name + 3);  /* push name without prefix */
       lua_remove(L, -2);  /* remove original name */
     }
-    lua_copy(L, -1, top + 1);  /* copy name to proper place */
-    lua_settop(L, top + 1);  /* remove table "loaded" and name copy */
+    lua_copy(L, -1, top + 1);  /* move name to proper place */
+    lua_pop(L, 2);  /* remove pushed values */
     return 1;
   }
   else {
@@ -130,37 +124,32 @@ static int lastlevel (lua_State *L) {
 
 LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
                                 const char *msg, int level) {
-  luaL_Buffer b;
   lua_Debug ar;
+  int top = lua_gettop(L);
   int last = lastlevel(L1);
-  int limit2show = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
-  luaL_buffinit(L, &b);
-  if (msg) {
-    luaL_addstring(&b, msg);
-    luaL_addchar(&b, '\n');
-  }
-  luaL_addstring(&b, "stack traceback:");
+  int n1 = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
+  if (msg)
+    lua_pushfstring(L, "%s\n", msg);
+  luaL_checkstack(L, 10, NULL);
+  lua_pushliteral(L, "stack traceback:");
   while (lua_getstack(L1, level++, &ar)) {
-    if (limit2show-- == 0) {  /* too many levels? */
-      int n = last - level - LEVELS2 + 1;  /* number of levels to skip */
-      lua_pushfstring(L, "\n\t...\t(skipping %d levels)", n);
-      luaL_addvalue(&b);  /* add warning about skip */
-      level += n;  /* and skip to last levels */
+    if (n1-- == 0) {  /* too many levels? */
+      lua_pushliteral(L, "\n\t...");  /* add a '...' */
+      level = last - LEVELS2 + 1;  /* and skip to last ones */
     }
     else {
       lua_getinfo(L1, "Slnt", &ar);
-      if (ar.currentline <= 0)
-        lua_pushfstring(L, "\n\t%s: in ", ar.short_src);
-      else
-        lua_pushfstring(L, "\n\t%s:%d: in ", ar.short_src, ar.currentline);
-      luaL_addvalue(&b);
+      lua_pushfstring(L, "\n\t%s:", ar.short_src);
+      if (ar.currentline > 0)
+        lua_pushfstring(L, "%d:", ar.currentline);
+      lua_pushliteral(L, " in ");
       pushfuncname(L, &ar);
-      luaL_addvalue(&b);
       if (ar.istailcall)
-        luaL_addstring(&b, "\n\t(...tail calls...)");
+        lua_pushliteral(L, "\n\t(...tail calls...)");
+      lua_concat(L, lua_gettop(L) - top);
     }
   }
-  luaL_pushresult(&b);
+  lua_concat(L, lua_gettop(L) - top);
 }
 
 /* }====================================================== */
@@ -190,7 +179,7 @@ LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) {
 }
 
 
-LUALIB_API int luaL_typeerror (lua_State *L, int arg, const char *tname) {
+static int typeerror (lua_State *L, int arg, const char *tname) {
   const char *msg;
   const char *typearg;  /* name for the type of the actual argument */
   if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING)
@@ -205,7 +194,7 @@ LUALIB_API int luaL_typeerror (lua_State *L, int arg, const char *tname) {
 
 
 static void tag_error (lua_State *L, int arg, int tag) {
-  luaL_typeerror(L, arg, lua_typename(L, tag));
+  typeerror(L, arg, lua_typename(L, tag));
 }
 
 
@@ -249,7 +238,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
     return 1;
   }
   else {
-    luaL_pushfail(L);
+    lua_pushnil(L);
     if (fname)
       lua_pushfstring(L, "%s: %s", fname, strerror(en));
     else
@@ -283,25 +272,24 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 
 
 LUALIB_API int luaL_execresult (lua_State *L, int stat) {
-  if (stat != 0 && errno != 0)  /* error with an 'errno'? */
+  const char *what = "exit";  /* type of termination */
+  if (stat == -1)  /* error? */
     return luaL_fileresult(L, 0, NULL);
   else {
-    const char *what = "exit";  /* type of termination */
     l_inspectstat(stat, what);  /* interpret result */
     if (*what == 'e' && stat == 0)  /* successful termination? */
       lua_pushboolean(L, 1);
     else
-      luaL_pushfail(L);
+      lua_pushnil(L);
     lua_pushstring(L, what);
     lua_pushinteger(L, stat);
-    return 3;  /* return true/fail,what,code */
+    return 3;  /* return true/nil,what,code */
   }
 }
 
 /* }====================================================== */
 
 
-
 /*
 ** {======================================================
 ** Userdata's metatable manipulation
@@ -344,7 +332,7 @@ LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) {
 
 LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
   void *p = luaL_testudata(L, ud, tname);
-  luaL_argexpected(L, p != NULL, ud, tname);
+  if (p == NULL) typeerror(L, ud, tname);
   return p;
 }
 
@@ -378,7 +366,7 @@ LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
 ** but without 'msg'.)
 */
 LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
-  if (l_unlikely(!lua_checkstack(L, space))) {
+  if (!lua_checkstack(L, space)) {
     if (msg)
       luaL_error(L, "stack overflow (%s)", msg);
     else
@@ -388,20 +376,20 @@ LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
 
 
 LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) {
-  if (l_unlikely(lua_type(L, arg) != t))
+  if (lua_type(L, arg) != t)
     tag_error(L, arg, t);
 }
 
 
 LUALIB_API void luaL_checkany (lua_State *L, int arg) {
-  if (l_unlikely(lua_type(L, arg) == LUA_TNONE))
+  if (lua_type(L, arg) == LUA_TNONE)
     luaL_argerror(L, arg, "value expected");
 }
 
 
 LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) {
   const char *s = lua_tolstring(L, arg, len);
-  if (l_unlikely(!s)) tag_error(L, arg, LUA_TSTRING);
+  if (!s) tag_error(L, arg, LUA_TSTRING);
   return s;
 }
 
@@ -420,7 +408,7 @@ LUALIB_API const char *luaL_optlstring (lua_State *L, int arg,
 LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {
   int isnum;
   lua_Number d = lua_tonumberx(L, arg, &isnum);
-  if (l_unlikely(!isnum))
+  if (!isnum)
     tag_error(L, arg, LUA_TNUMBER);
   return d;
 }
@@ -442,7 +430,7 @@ static void interror (lua_State *L, int arg) {
 LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
   int isnum;
   lua_Integer d = lua_tointegerx(L, arg, &isnum);
-  if (l_unlikely(!isnum)) {
+  if (!isnum) {
     interror(L, arg);
   }
   return d;
@@ -475,9 +463,9 @@ static void *resizebox (lua_State *L, int idx, size_t newsize) {
   lua_Alloc allocf = lua_getallocf(L, &ud);
   UBox *box = (UBox *)lua_touserdata(L, idx);
   void *temp = allocf(ud, box->box, box->bsize, newsize);
-  if (l_unlikely(temp == NULL && newsize > 0)) {  /* allocation error? */
-    lua_pushliteral(L, "not enough memory");
-    lua_error(L);  /* raise a memory error */
+  if (temp == NULL && newsize > 0) {  /* allocation error? */
+    resizebox(L, idx, 0);  /* free buffer */
+    luaL_error(L, "not enough memory for buffer allocation");
   }
   box->box = temp;
   box->bsize = newsize;
@@ -491,20 +479,16 @@ static int boxgc (lua_State *L) {
 }
 
 
-static const luaL_Reg boxmt[] = {  /* box metamethods */
-  {"__gc", boxgc},
-  {"__close", boxgc},
-  {NULL, NULL}
-};
-
-
-static void newbox (lua_State *L) {
-  UBox *box = (UBox *)lua_newuserdatauv(L, sizeof(UBox), 0);
+static void *newbox (lua_State *L, size_t newsize) {
+  UBox *box = (UBox *)lua_newuserdata(L, sizeof(UBox));
   box->box = NULL;
   box->bsize = 0;
-  if (luaL_newmetatable(L, "_UBOX*"))  /* creating metatable? */
-    luaL_setfuncs(L, boxmt, 0);  /* set its metamethods */
+  if (luaL_newmetatable(L, "LUABOX")) {  /* creating metatable? */
+    lua_pushcfunction(L, boxgc);
+    lua_setfield(L, -2, "__gc");  /* metatable.__gc = boxgc */
+  }
   lua_setmetatable(L, -2);
+  return resizebox(L, -1, newsize);
 }
 
 
@@ -512,73 +496,38 @@ static void newbox (lua_State *L) {
 ** check whether buffer is using a userdata on the stack as a temporary
 ** buffer
 */
-#define buffonstack(B)	((B)->b != (B)->init.b)
+#define buffonstack(B)	((B)->b != (B)->initb)
 
 
-/*
-** Whenever buffer is accessed, slot 'idx' must either be a box (which
-** cannot be NULL) or it is a placeholder for the buffer.
-*/
-#define checkbufferlevel(B,idx)  \
-  lua_assert(buffonstack(B) ? lua_touserdata(B->L, idx) != NULL  \
-                            : lua_touserdata(B->L, idx) == (void*)B)
-
-
-/*
-** Compute new size for buffer 'B', enough to accommodate extra 'sz'
-** bytes.
-*/
-static size_t newbuffsize (luaL_Buffer *B, size_t sz) {
-  size_t newsize = B->size * 2;  /* double buffer size */
-  if (l_unlikely(MAX_SIZET - sz < B->n))  /* overflow in (B->n + sz)? */
-    return luaL_error(B->L, "buffer too large");
-  if (newsize < B->n + sz)  /* double is not big enough? */
-    newsize = B->n + sz;
-  return newsize;
-}
-
-
-/*
-** Returns a pointer to a free area with at least 'sz' bytes in buffer
-** 'B'. 'boxidx' is the relative position in the stack where is the
-** buffer's box or its placeholder.
-*/
-static char *prepbuffsize (luaL_Buffer *B, size_t sz, int boxidx) {
-  checkbufferlevel(B, boxidx);
-  if (B->size - B->n >= sz)  /* enough space? */
-    return B->b + B->n;
-  else {
-    lua_State *L = B->L;
-    char *newbuff;
-    size_t newsize = newbuffsize(B, sz);
-    /* create larger buffer */
-    if (buffonstack(B))  /* buffer already has a box? */
-      newbuff = (char *)resizebox(L, boxidx, newsize);  /* resize it */
-    else {  /* no box yet */
-      lua_remove(L, boxidx);  /* remove placeholder */
-      newbox(L);  /* create a new box */
-      lua_insert(L, boxidx);  /* move box to its intended position */
-      lua_toclose(L, boxidx);
-      newbuff = (char *)resizebox(L, boxidx, newsize);
-      memcpy(newbuff, B->b, B->n * sizeof(char));  /* copy original content */
-    }
-    B->b = newbuff;
-    B->size = newsize;
-    return newbuff + B->n;
-  }
-}
-
 /*
 ** returns a pointer to a free area with at least 'sz' bytes
 */
 LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
-  return prepbuffsize(B, sz, -1);
+  lua_State *L = B->L;
+  if (B->size - B->n < sz) {  /* not enough space? */
+    char *newbuff;
+    size_t newsize = B->size * 2;  /* double buffer size */
+    if (newsize - B->n < sz)  /* not big enough? */
+      newsize = B->n + sz;
+    if (newsize < B->n || newsize - B->n < sz)
+      luaL_error(L, "buffer too large");
+    /* create larger buffer */
+    if (buffonstack(B))
+      newbuff = (char *)resizebox(L, -1, newsize);
+    else {  /* no buffer yet */
+      newbuff = (char *)newbox(L, newsize);
+      memcpy(newbuff, B->b, B->n * sizeof(char));  /* copy original content */
+    }
+    B->b = newbuff;
+    B->size = newsize;
+  }
+  return &B->b[B->n];
 }
 
 
 LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
   if (l > 0) {  /* avoid 'memcpy' when 's' can be NULL */
-    char *b = prepbuffsize(B, l, -1);
+    char *b = luaL_prepbuffsize(B, l);
     memcpy(b, s, l * sizeof(char));
     luaL_addsize(B, l);
   }
@@ -592,11 +541,11 @@ LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
 
 LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
   lua_State *L = B->L;
-  checkbufferlevel(B, -1);
   lua_pushlstring(L, B->b, B->n);
-  if (buffonstack(B))
-    lua_closeslot(L, -2);  /* close the box */
-  lua_remove(L, -2);  /* remove box or placeholder from the stack */
+  if (buffonstack(B)) {
+    resizebox(L, -2, 0);  /* delete old buffer */
+    lua_remove(L, -2);  /* remove its header from the stack */
+  }
 }
 
 
@@ -606,38 +555,28 @@ LUALIB_API void luaL_pushresultsize (luaL_Buffer *B, size_t sz) {
 }
 
 
-/*
-** 'luaL_addvalue' is the only function in the Buffer system where the
-** box (if existent) is not on the top of the stack. So, instead of
-** calling 'luaL_addlstring', it replicates the code using -2 as the
-** last argument to 'prepbuffsize', signaling that the box is (or will
-** be) bellow the string being added to the buffer. (Box creation can
-** trigger an emergency GC, so we should not remove the string from the
-** stack before we have the space guaranteed.)
-*/
 LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
   lua_State *L = B->L;
-  size_t len;
-  const char *s = lua_tolstring(L, -1, &len);
-  char *b = prepbuffsize(B, len, -2);
-  memcpy(b, s, len * sizeof(char));
-  luaL_addsize(B, len);
-  lua_pop(L, 1);  /* pop string */
+  size_t l;
+  const char *s = lua_tolstring(L, -1, &l);
+  if (buffonstack(B))
+    lua_insert(L, -2);  /* put value below buffer */
+  luaL_addlstring(B, s, l);
+  lua_remove(L, (buffonstack(B)) ? -2 : -1);  /* remove value */
 }
 
 
 LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
   B->L = L;
-  B->b = B->init.b;
+  B->b = B->initb;
   B->n = 0;
   B->size = LUAL_BUFFERSIZE;
-  lua_pushlightuserdata(L, (void*)B);  /* push placeholder */
 }
 
 
 LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) {
   luaL_buffinit(L, B);
-  return prepbuffsize(B, sz, -1);
+  return luaL_prepbuffsize(B, sz);
 }
 
 /* }====================================================== */
@@ -649,14 +588,10 @@ LUALIB_API char *luaL_buffinitsize (lua_State *L, luaL_Buffer *B, size_t sz) {
 ** =======================================================
 */
 
-/* index of free-list header (after the predefined values) */
-#define freelist	(LUA_RIDX_LAST + 1)
+/* index of free-list header */
+#define freelist	0
+
 
-/*
-** The previously freed references form a linked list:
-** t[freelist] is the index of a first free index, or zero if list is
-** empty; t[t[freelist]] is the index of the second element; etc.
-*/
 LUALIB_API int luaL_ref (lua_State *L, int t) {
   int ref;
   if (lua_isnil(L, -1)) {
@@ -664,16 +599,9 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
     return LUA_REFNIL;  /* 'nil' has a unique fixed reference */
   }
   t = lua_absindex(L, t);
-  if (lua_rawgeti(L, t, freelist) == LUA_TNIL) {  /* first access? */
-    ref = 0;  /* list is empty */
-    lua_pushinteger(L, 0);  /* initialize as an empty list */
-    lua_rawseti(L, t, freelist);  /* ref = t[freelist] = 0 */
-  }
-  else {  /* already initialized */
-    lua_assert(lua_isinteger(L, -1));
-    ref = (int)lua_tointeger(L, -1);  /* ref = t[freelist] */
-  }
-  lua_pop(L, 1);  /* remove element from stack */
+  lua_rawgeti(L, t, freelist);  /* get first free element */
+  ref = (int)lua_tointeger(L, -1);  /* ref = t[freelist] */
+  lua_pop(L, 1);  /* remove it from stack */
   if (ref != 0) {  /* any free element? */
     lua_rawgeti(L, t, ref);  /* remove it from list */
     lua_rawseti(L, t, freelist);  /* (t[freelist] = t[ref]) */
@@ -689,7 +617,6 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
   if (ref >= 0) {
     t = lua_absindex(L, t);
     lua_rawgeti(L, t, freelist);
-    lua_assert(lua_isinteger(L, -1));
     lua_rawseti(L, t, ref);  /* t[ref] = t[freelist] */
     lua_pushinteger(L, ref);
     lua_rawseti(L, t, freelist);  /* t[freelist] = ref */
@@ -873,7 +800,7 @@ LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
   int isnum;
   lua_len(L, idx);
   l = lua_tointegerx(L, -1, &isnum);
-  if (l_unlikely(!isnum))
+  if (!isnum)
     luaL_error(L, "object length is not an integer");
   lua_pop(L, 1);  /* remove object */
   return l;
@@ -918,6 +845,87 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
 }
 
 
+/*
+** {======================================================
+** Compatibility with 5.1 module functions
+** =======================================================
+*/
+#if defined(LUA_COMPAT_MODULE)
+
+static const char *luaL_findtable (lua_State *L, int idx,
+                                   const char *fname, int szhint) {
+  const char *e;
+  if (idx) lua_pushvalue(L, idx);
+  do {
+    e = strchr(fname, '.');
+    if (e == NULL) e = fname + strlen(fname);
+    lua_pushlstring(L, fname, e - fname);
+    if (lua_rawget(L, -2) == LUA_TNIL) {  /* no such field? */
+      lua_pop(L, 1);  /* remove this nil */
+      lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
+      lua_pushlstring(L, fname, e - fname);
+      lua_pushvalue(L, -2);
+      lua_settable(L, -4);  /* set new table into field */
+    }
+    else if (!lua_istable(L, -1)) {  /* field has a non-table value? */
+      lua_pop(L, 2);  /* remove table and value */
+      return fname;  /* return problematic part of the name */
+    }
+    lua_remove(L, -2);  /* remove previous table */
+    fname = e + 1;
+  } while (*e == '.');
+  return NULL;
+}
+
+
+/*
+** Count number of elements in a luaL_Reg list.
+*/
+static int libsize (const luaL_Reg *l) {
+  int size = 0;
+  for (; l && l->name; l++) size++;
+  return size;
+}
+
+
+/*
+** Find or create a module table with a given name. The function
+** first looks at the LOADED table and, if that fails, try a
+** global variable with that name. In any case, leaves on the stack
+** the module table.
+*/
+LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
+                                 int sizehint) {
+  luaL_findtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE, 1);
+  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no LOADED[modname]? */
+    lua_pop(L, 1);  /* remove previous result */
+    /* try global variable (and create one if it does not exist) */
+    lua_pushglobaltable(L);
+    if (luaL_findtable(L, 0, modname, sizehint) != NULL)
+      luaL_error(L, "name conflict for module '%s'", modname);
+    lua_pushvalue(L, -1);
+    lua_setfield(L, -3, modname);  /* LOADED[modname] = new table */
+  }
+  lua_remove(L, -2);  /* remove LOADED table */
+}
+
+
+LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
+                               const luaL_Reg *l, int nup) {
+  luaL_checkversion(L);
+  if (libname) {
+    luaL_pushmodule(L, libname, libsize(l));  /* get/create library table */
+    lua_insert(L, -(nup + 1));  /* move library table to below upvalues */
+  }
+  if (l)
+    luaL_setfuncs(L, l, nup);
+  else
+    lua_pop(L, nup);  /* remove upvalues */
+}
+
+#endif
+/* }====================================================== */
+
 /*
 ** set functions from list 'l' into table at top - 'nup'; each
 ** function gets the 'nup' elements at the top as upvalues.
@@ -926,14 +934,10 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
 LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
   luaL_checkstack(L, nup, "too many upvalues");
   for (; l->name != NULL; l++) {  /* fill the table with given functions */
-    if (l->func == NULL)  /* place holder? */
-      lua_pushboolean(L, 0);
-    else {
-      int i;
-      for (i = 0; i < nup; i++)  /* copy upvalues to the top */
-        lua_pushvalue(L, -nup);
-      lua_pushcclosure(L, l->func, nup);  /* closure with those upvalues */
-    }
+    int i;
+    for (i = 0; i < nup; i++)  /* copy upvalues to the top */
+      lua_pushvalue(L, -nup);
+    lua_pushcclosure(L, l->func, nup);  /* closure with those upvalues */
     lua_setfield(L, -(nup + 2), l->name);
   }
   lua_pop(L, nup);  /* remove upvalues */
@@ -984,24 +988,18 @@ LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
 }
 
 
-LUALIB_API void luaL_addgsub (luaL_Buffer *b, const char *s,
-                                     const char *p, const char *r) {
+LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
+                                                               const char *r) {
   const char *wild;
   size_t l = strlen(p);
-  while ((wild = strstr(s, p)) != NULL) {
-    luaL_addlstring(b, s, wild - s);  /* push prefix */
-    luaL_addstring(b, r);  /* push replacement in place of pattern */
-    s = wild + l;  /* continue after 'p' */
-  }
-  luaL_addstring(b, s);  /* push last suffix */
-}
-
-
-LUALIB_API const char *luaL_gsub (lua_State *L, const char *s,
-                                  const char *p, const char *r) {
   luaL_Buffer b;
   luaL_buffinit(L, &b);
-  luaL_addgsub(&b, s, p, r);
+  while ((wild = strstr(s, p)) != NULL) {
+    luaL_addlstring(&b, s, wild - s);  /* push prefix */
+    luaL_addstring(&b, r);  /* push replacement in place of pattern */
+    s = wild + l;  /* continue after 'p' */
+  }
+  luaL_addstring(&b, s);  /* push last suffix */
   luaL_pushresult(&b);
   return lua_tostring(L, -1);
 }
@@ -1013,93 +1011,38 @@ static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
     free(ptr);
     return NULL;
   }
-  else
-    return realloc(ptr, nsize);
+  else {  /* cannot fail when shrinking a block */
+    void *newptr = realloc(ptr, nsize);
+    if (newptr == NULL && ptr != NULL && nsize <= osize)
+      return ptr;  /* keep the original block */
+    else  /* no fail or not shrinking */
+     return newptr;  /* use the new block */
+  }
 }
 
 
 static int panic (lua_State *L) {
-  const char *msg = lua_tostring(L, -1);
-  if (msg == NULL) msg = "error object is not a string";
   lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
-                        msg);
+                        lua_tostring(L, -1));
   return 0;  /* return to Lua to abort */
 }
 
 
-/*
-** Warning functions:
-** warnfoff: warning system is off
-** warnfon: ready to start a new message
-** warnfcont: previous message is to be continued
-*/
-static void warnfoff (void *ud, const char *message, int tocont);
-static void warnfon (void *ud, const char *message, int tocont);
-static void warnfcont (void *ud, const char *message, int tocont);
-
-
-/*
-** Check whether message is a control message. If so, execute the
-** control or ignore it if unknown.
-*/
-static int checkcontrol (lua_State *L, const char *message, int tocont) {
-  if (tocont || *(message++) != '@')  /* not a control message? */
-    return 0;
-  else {
-    if (strcmp(message, "off") == 0)
-      lua_setwarnf(L, warnfoff, L);  /* turn warnings off */
-    else if (strcmp(message, "on") == 0)
-      lua_setwarnf(L, warnfon, L);   /* turn warnings on */
-    return 1;  /* it was a control message */
-  }
-}
-
-
-static void warnfoff (void *ud, const char *message, int tocont) {
-  checkcontrol((lua_State *)ud, message, tocont);
-}
-
-
-/*
-** Writes the message and handle 'tocont', finishing the message
-** if needed and setting the next warn function.
-*/
-static void warnfcont (void *ud, const char *message, int tocont) {
-  lua_State *L = (lua_State *)ud;
-  lua_writestringerror("%s", message);  /* write message */
-  if (tocont)  /* not the last part? */
-    lua_setwarnf(L, warnfcont, L);  /* to be continued */
-  else {  /* last part */
-    lua_writestringerror("%s", "\n");  /* finish message with end-of-line */
-    lua_setwarnf(L, warnfon, L);  /* next call is a new message */
-  }
-}
-
-
-static void warnfon (void *ud, const char *message, int tocont) {
-  if (checkcontrol((lua_State *)ud, message, tocont))  /* control message? */
-    return;  /* nothing else to be done */
-  lua_writestringerror("%s", "Lua warning: ");  /* start a new warning */
-  warnfcont(ud, message, tocont);  /* finish processing */
-}
-
-
 LUALIB_API lua_State *luaL_newstate (void) {
   lua_State *L = lua_newstate(l_alloc, NULL);
-  if (l_likely(L)) {
-    lua_atpanic(L, &panic);
-    lua_setwarnf(L, warnfoff, L);  /* default is warnings off */
-  }
+  if (L) lua_atpanic(L, &panic);
   return L;
 }
 
 
 LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
-  lua_Number v = lua_version(L);
+  const lua_Number *v = lua_version(L);
   if (sz != LUAL_NUMSIZES)  /* check numeric types */
     luaL_error(L, "core and library have incompatible numeric types");
-  else if (v != ver)
+  if (v != lua_version(NULL))
+    luaL_error(L, "multiple Lua VMs detected");
+  else if (*v != ver)
     luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
-                  (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)v);
+                  (LUAI_UACNUMBER)ver, (LUAI_UACNUMBER)*v);
 }
 

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h $
+** $Id: lauxlib.h,v 1.131.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -12,16 +12,9 @@
 #include <stddef.h>
 #include <stdio.h>
 
-#include "luaconf.h"
 #include "lua.h"
 
 
-/* global table */
-#define LUA_GNAME	"_G"
-
-
-typedef struct luaL_Buffer luaL_Buffer;
-
 
 /* extra error code for 'luaL_loadfilex' */
 #define LUA_ERRFILE     (LUA_ERRERR+1)
@@ -51,7 +44,6 @@ LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
 LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
 LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
 LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
-LUALIB_API int (luaL_typeerror) (lua_State *L, int arg, const char *tname);
 LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
                                                           size_t *l);
 LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
@@ -81,7 +73,6 @@ LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
 LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
 LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
 
-
 /* predefined references */
 #define LUA_NOREF       (-2)
 #define LUA_REFNIL      (-1)
@@ -102,10 +93,8 @@ LUALIB_API lua_State *(luaL_newstate) (void);
 
 LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
 
-LUALIB_API void luaL_addgsub (luaL_Buffer *b, const char *s,
-                                     const char *p, const char *r);
-LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s,
-                                    const char *p, const char *r);
+LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
+                                                  const char *r);
 
 LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
 
@@ -131,11 +120,7 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
   (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
 
 #define luaL_argcheck(L, cond,arg,extramsg)	\
-	((void)(luai_likely(cond) || luaL_argerror(L, (arg), (extramsg))))
-
-#define luaL_argexpected(L,cond,arg,tname)	\
-	((void)(luai_likely(cond) || luaL_typeerror(L, (arg), (tname))))
-
+		((void)((cond) || luaL_argerror(L, (arg), (extramsg))))
 #define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
 #define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
 
@@ -154,46 +139,19 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
 #define luaL_loadbuffer(L,s,sz,n)	luaL_loadbufferx(L,s,sz,n,NULL)
 
 
-/* push the value used to represent failure/error */
-#define luaL_pushfail(L)	lua_pushnil(L)
-
-
-/*
-** Internal assertions for in-house debugging
-*/
-#if !defined(lua_assert)
-
-#if defined LUAI_ASSERT
-  #include <assert.h>
-  #define lua_assert(c)		assert(c)
-#else
-  #define lua_assert(c)		((void)0)
-#endif
-
-#endif
-
-
-
 /*
 ** {======================================================
 ** Generic Buffer manipulation
 ** =======================================================
 */
 
-struct luaL_Buffer {
+typedef struct luaL_Buffer {
   char *b;  /* buffer address */
   size_t size;  /* buffer size */
   size_t n;  /* number of characters in buffer */
   lua_State *L;
-  union {
-    LUAI_MAXALIGN;  /* ensure maximum alignment for buffer */
-    char b[LUAL_BUFFERSIZE];  /* initial buffer */
-  } init;
-};
-
-
-#define luaL_bufflen(bf)	((bf)->n)
-#define luaL_buffaddr(bf)	((bf)->b)
+  char initb[LUAL_BUFFERSIZE];  /* initial buffer */
+} luaL_Buffer;
 
 
 #define luaL_addchar(B,c) \
@@ -202,8 +160,6 @@ struct luaL_Buffer {
 
 #define luaL_addsize(B,s)	((B)->n += (s))
 
-#define luaL_buffsub(B,s)	((B)->n -= (s))
-
 LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
 LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
 LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
@@ -241,6 +197,21 @@ typedef struct luaL_Stream {
 
 /* }====================================================== */
 
+
+
+/* compatibility with old module system */
+#if defined(LUA_COMPAT_MODULE)
+
+LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname,
+                                   int sizehint);
+LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
+                                const luaL_Reg *l, int nup);
+
+#define luaL_register(L,n,l)	(luaL_openlib(L,(n),(l),0))
+
+#endif
+
+
 /*
 ** {==================================================================
 ** "Abstraction Layer" for basic report of messages and errors

lbaselib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c $
+** $Id: lbaselib.c,v 1.314.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -24,12 +24,18 @@
 static int luaB_print (lua_State *L) {
   int n = lua_gettop(L);  /* number of arguments */
   int i;
-  for (i = 1; i <= n; i++) {  /* for each argument */
+  lua_getglobal(L, "tostring");
+  for (i=1; i<=n; i++) {
+    const char *s;
     size_t l;
-    const char *s = luaL_tolstring(L, i, &l);  /* convert it to string */
-    if (i > 1)  /* not the first element? */
-      lua_writestring("\t", 1);  /* add a tab before it */
-    lua_writestring(s, l);  /* print it */
+    lua_pushvalue(L, -1);  /* function to be called */
+    lua_pushvalue(L, i);   /* value to print */
+    lua_call(L, 1, 1);
+    s = lua_tolstring(L, -1, &l);  /* get result */
+    if (s == NULL)
+      return luaL_error(L, "'tostring' must return a string to 'print'");
+    if (i>1) lua_writestring("\t", 1);
+    lua_writestring(s, l);
     lua_pop(L, 1);  /* pop result */
   }
   lua_writeline();
@@ -37,31 +43,13 @@ static int luaB_print (lua_State *L) {
 }
 
 
-/*
-** Creates a warning with all given arguments.
-** Check first for errors; otherwise an error may interrupt
-** the composition of a warning, leaving it unfinished.
-*/
-static int luaB_warn (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int i;
-  luaL_checkstring(L, 1);  /* at least one argument */
-  for (i = 2; i <= n; i++)
-    luaL_checkstring(L, i);  /* make sure all arguments are strings */
-  for (i = 1; i < n; i++)  /* compose warning */
-    lua_warning(L, lua_tostring(L, i), 1);
-  lua_warning(L, lua_tostring(L, n), 0);  /* close warning */
-  return 0;
-}
-
-
 #define SPACECHARS	" \f\n\r\t\v"
 
 static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
   lua_Unsigned n = 0;
   int neg = 0;
   s += strspn(s, SPACECHARS);  /* skip initial spaces */
-  if (*s == '-') { s++; neg = 1; }  /* handle sign */
+  if (*s == '-') { s++; neg = 1; }  /* handle signal */
   else if (*s == '+') s++;
   if (!isalnum((unsigned char)*s))  /* no digit? */
     return NULL;
@@ -80,6 +68,7 @@ static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
 
 static int luaB_tonumber (lua_State *L) {
   if (lua_isnoneornil(L, 2)) {  /* standard conversion? */
+    luaL_checkany(L, 1);
     if (lua_type(L, 1) == LUA_TNUMBER) {  /* already a number? */
       lua_settop(L, 1);  /* yes; return it */
       return 1;
@@ -90,7 +79,6 @@ static int luaB_tonumber (lua_State *L) {
       if (s != NULL && lua_stringtonumber(L, s) == l + 1)
         return 1;  /* successful conversion to number */
       /* else not a number */
-      luaL_checkany(L, 1);  /* (but there must be some parameter) */
     }
   }
   else {
@@ -106,7 +94,7 @@ static int luaB_tonumber (lua_State *L) {
       return 1;
     }  /* else not a number */
   }  /* else not a number */
-  luaL_pushfail(L);  /* not a number */
+  lua_pushnil(L);  /* not a number */
   return 1;
 }
 
@@ -137,8 +125,9 @@ static int luaB_getmetatable (lua_State *L) {
 static int luaB_setmetatable (lua_State *L) {
   int t = lua_type(L, 2);
   luaL_checktype(L, 1, LUA_TTABLE);
-  luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
-  if (l_unlikely(luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL))
+  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
+                    "nil or table expected");
+  if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)
     return luaL_error(L, "cannot change a protected metatable");
   lua_settop(L, 2);
   lua_setmetatable(L, 1);
@@ -156,8 +145,8 @@ static int luaB_rawequal (lua_State *L) {
 
 static int luaB_rawlen (lua_State *L) {
   int t = lua_type(L, 1);
-  luaL_argexpected(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
-                      "table or string");
+  luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
+                   "table or string expected");
   lua_pushinteger(L, lua_rawlen(L, 1));
   return 1;
 }
@@ -181,59 +170,27 @@ static int luaB_rawset (lua_State *L) {
 }
 
 
-static int pushmode (lua_State *L, int oldmode) {
-  lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental"
-                                           : "generational");
-  return 1;
-}
-
-
 static int luaB_collectgarbage (lua_State *L) {
   static const char *const opts[] = {"stop", "restart", "collect",
     "count", "step", "setpause", "setstepmul",
-    "isrunning", "generational", "incremental", NULL};
+    "isrunning", NULL};
   static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
     LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
-    LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
+    LUA_GCISRUNNING};
   int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
+  int ex = (int)luaL_optinteger(L, 2, 0);
+  int res = lua_gc(L, o, ex);
   switch (o) {
     case LUA_GCCOUNT: {
-      int k = lua_gc(L, o);
-      int b = lua_gc(L, LUA_GCCOUNTB);
-      lua_pushnumber(L, (lua_Number)k + ((lua_Number)b/1024));
+      int b = lua_gc(L, LUA_GCCOUNTB, 0);
+      lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024));
       return 1;
     }
-    case LUA_GCSTEP: {
-      int step = (int)luaL_optinteger(L, 2, 0);
-      int res = lua_gc(L, o, step);
+    case LUA_GCSTEP: case LUA_GCISRUNNING: {
       lua_pushboolean(L, res);
       return 1;
     }
-    case LUA_GCSETPAUSE:
-    case LUA_GCSETSTEPMUL: {
-      int p = (int)luaL_optinteger(L, 2, 0);
-      int previous = lua_gc(L, o, p);
-      lua_pushinteger(L, previous);
-      return 1;
-    }
-    case LUA_GCISRUNNING: {
-      int res = lua_gc(L, o);
-      lua_pushboolean(L, res);
-      return 1;
-    }
-    case LUA_GCGEN: {
-      int minormul = (int)luaL_optinteger(L, 2, 0);
-      int majormul = (int)luaL_optinteger(L, 3, 0);
-      return pushmode(L, lua_gc(L, o, minormul, majormul));
-    }
-    case LUA_GCINC: {
-      int pause = (int)luaL_optinteger(L, 2, 0);
-      int stepmul = (int)luaL_optinteger(L, 3, 0);
-      int stepsize = (int)luaL_optinteger(L, 4, 0);
-      return pushmode(L, lua_gc(L, o, pause, stepmul, stepsize));
-    }
     default: {
-      int res = lua_gc(L, o);
       lua_pushinteger(L, res);
       return 1;
     }
@@ -249,6 +206,23 @@ static int luaB_type (lua_State *L) {
 }
 
 
+static int pairsmeta (lua_State *L, const char *method, int iszero,
+                      lua_CFunction iter) {
+  luaL_checkany(L, 1);
+  if (luaL_getmetafield(L, 1, method) == LUA_TNIL) {  /* no metamethod? */
+    lua_pushcfunction(L, iter);  /* will return generator, */
+    lua_pushvalue(L, 1);  /* state, */
+    if (iszero) lua_pushinteger(L, 0);  /* and initial value */
+    else lua_pushnil(L);
+  }
+  else {
+    lua_pushvalue(L, 1);  /* argument 'self' to metamethod */
+    lua_call(L, 1, 3);  /* get 3 values from metamethod */
+  }
+  return 3;
+}
+
+
 static int luaB_next (lua_State *L) {
   luaL_checktype(L, 1, LUA_TTABLE);
   lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
@@ -262,17 +236,7 @@ static int luaB_next (lua_State *L) {
 
 
 static int luaB_pairs (lua_State *L) {
-  luaL_checkany(L, 1);
-  if (luaL_getmetafield(L, 1, "__pairs") == LUA_TNIL) {  /* no metamethod? */
-    lua_pushcfunction(L, luaB_next);  /* will return generator, */
-    lua_pushvalue(L, 1);  /* state, */
-    lua_pushnil(L);  /* and initial value */
-  }
-  else {
-    lua_pushvalue(L, 1);  /* argument 'self' to metamethod */
-    lua_call(L, 1, 3);  /* get 3 values from metamethod */
-  }
-  return 3;
+  return pairsmeta(L, "__pairs", 0, luaB_next);
 }
 
 
@@ -291,16 +255,20 @@ static int ipairsaux (lua_State *L) {
 ** (The given "table" may not be a table.)
 */
 static int luaB_ipairs (lua_State *L) {
+#if defined(LUA_COMPAT_IPAIRS)
+  return pairsmeta(L, "__ipairs", 1, ipairsaux);
+#else
   luaL_checkany(L, 1);
   lua_pushcfunction(L, ipairsaux);  /* iteration function */
   lua_pushvalue(L, 1);  /* state */
   lua_pushinteger(L, 0);  /* initial value */
   return 3;
+#endif
 }
 
 
 static int load_aux (lua_State *L, int status, int envidx) {
-  if (l_likely(status == LUA_OK)) {
+  if (status == LUA_OK) {
     if (envidx != 0) {  /* 'env' parameter? */
       lua_pushvalue(L, envidx);  /* environment for loaded function */
       if (!lua_setupvalue(L, -2, 1))  /* set it as 1st upvalue */
@@ -309,9 +277,9 @@ static int load_aux (lua_State *L, int status, int envidx) {
     return 1;
   }
   else {  /* error (message is on top of the stack) */
-    luaL_pushfail(L);
+    lua_pushnil(L);
     lua_insert(L, -2);  /* put before error message */
-    return 2;  /* return fail plus error message */
+    return 2;  /* return nil plus error message */
   }
 }
 
@@ -356,7 +324,7 @@ static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
     *size = 0;
     return NULL;
   }
-  else if (l_unlikely(!lua_isstring(L, -1)))
+  else if (!lua_isstring(L, -1))
     luaL_error(L, "reader function must return a string");
   lua_replace(L, RESERVEDSLOT);  /* save string in reserved slot */
   return lua_tolstring(L, RESERVEDSLOT, size);
@@ -394,7 +362,7 @@ static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
 static int luaB_dofile (lua_State *L) {
   const char *fname = luaL_optstring(L, 1, NULL);
   lua_settop(L, 1);
-  if (l_unlikely(luaL_loadfile(L, fname) != LUA_OK))
+  if (luaL_loadfile(L, fname) != LUA_OK)
     return lua_error(L);
   lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
   return dofilecont(L, 0, 0);
@@ -402,7 +370,7 @@ static int luaB_dofile (lua_State *L) {
 
 
 static int luaB_assert (lua_State *L) {
-  if (l_likely(lua_toboolean(L, 1)))  /* condition is true? */
+  if (lua_toboolean(L, 1))  /* condition is true? */
     return lua_gettop(L);  /* return all arguments */
   else {  /* error */
     luaL_checkany(L, 1);  /* there must be a condition */
@@ -438,7 +406,7 @@ static int luaB_select (lua_State *L) {
 ** ignored).
 */
 static int finishpcall (lua_State *L, int status, lua_KContext extra) {
-  if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) {  /* error? */
+  if (status != LUA_OK && status != LUA_YIELD) {  /* error? */
     lua_pushboolean(L, 0);  /* first result (false) */
     lua_pushvalue(L, -2);  /* error message */
     return 2;  /* return false, msg */
@@ -491,11 +459,13 @@ static const luaL_Reg base_funcs[] = {
   {"ipairs", luaB_ipairs},
   {"loadfile", luaB_loadfile},
   {"load", luaB_load},
+#if defined(LUA_COMPAT_LOADSTRING)
+  {"loadstring", luaB_load},
+#endif
   {"next", luaB_next},
   {"pairs", luaB_pairs},
   {"pcall", luaB_pcall},
   {"print", luaB_print},
-  {"warn", luaB_warn},
   {"rawequal", luaB_rawequal},
   {"rawlen", luaB_rawlen},
   {"rawget", luaB_rawget},
@@ -507,7 +477,7 @@ static const luaL_Reg base_funcs[] = {
   {"type", luaB_type},
   {"xpcall", luaB_xpcall},
   /* placeholders */
-  {LUA_GNAME, NULL},
+  {"_G", NULL},
   {"_VERSION", NULL},
   {NULL, NULL}
 };
@@ -519,7 +489,7 @@ LUAMOD_API int luaopen_base (lua_State *L) {
   luaL_setfuncs(L, base_funcs, 0);
   /* set global _G */
   lua_pushvalue(L, -1);
-  lua_setfield(L, -2, LUA_GNAME);
+  lua_setfield(L, -2, "_G");
   /* set global _VERSION */
   lua_pushliteral(L, LUA_VERSION);
   lua_setfield(L, -2, "_VERSION");

lbitlib.c

@@ -0,0 +1,233 @@
+/*
+** $Id: lbitlib.c,v 1.30.1.1 2017/04/19 17:20:42 roberto Exp $
+** Standard library for bitwise operations
+** See Copyright Notice in lua.h
+*/
+
+#define lbitlib_c
+#define LUA_LIB
+
+#include "lprefix.h"
+
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#if defined(LUA_COMPAT_BITLIB)		/* { */
+
+
+#define pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
+#define checkunsigned(L,i)	((lua_Unsigned)luaL_checkinteger(L,i))
+
+
+/* number of bits to consider in a number */
+#if !defined(LUA_NBITS)
+#define LUA_NBITS	32
+#endif
+
+
+/*
+** a lua_Unsigned with its first LUA_NBITS bits equal to 1. (Shift must
+** be made in two parts to avoid problems when LUA_NBITS is equal to the
+** number of bits in a lua_Unsigned.)
+*/
+#define ALLONES		(~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
+
+
+/* macro to trim extra bits */
+#define trim(x)		((x) & ALLONES)
+
+
+/* builds a number with 'n' ones (1 <= n <= LUA_NBITS) */
+#define mask(n)		(~((ALLONES << 1) << ((n) - 1)))
+
+
+
+static lua_Unsigned andaux (lua_State *L) {
+  int i, n = lua_gettop(L);
+  lua_Unsigned r = ~(lua_Unsigned)0;
+  for (i = 1; i <= n; i++)
+    r &= checkunsigned(L, i);
+  return trim(r);
+}
+
+
+static int b_and (lua_State *L) {
+  lua_Unsigned r = andaux(L);
+  pushunsigned(L, r);
+  return 1;
+}
+
+
+static int b_test (lua_State *L) {
+  lua_Unsigned r = andaux(L);
+  lua_pushboolean(L, r != 0);
+  return 1;
+}
+
+
+static int b_or (lua_State *L) {
+  int i, n = lua_gettop(L);
+  lua_Unsigned r = 0;
+  for (i = 1; i <= n; i++)
+    r |= checkunsigned(L, i);
+  pushunsigned(L, trim(r));
+  return 1;
+}
+
+
+static int b_xor (lua_State *L) {
+  int i, n = lua_gettop(L);
+  lua_Unsigned r = 0;
+  for (i = 1; i <= n; i++)
+    r ^= checkunsigned(L, i);
+  pushunsigned(L, trim(r));
+  return 1;
+}
+
+
+static int b_not (lua_State *L) {
+  lua_Unsigned r = ~checkunsigned(L, 1);
+  pushunsigned(L, trim(r));
+  return 1;
+}
+
+
+static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
+  if (i < 0) {  /* shift right? */
+    i = -i;
+    r = trim(r);
+    if (i >= LUA_NBITS) r = 0;
+    else r >>= i;
+  }
+  else {  /* shift left */
+    if (i >= LUA_NBITS) r = 0;
+    else r <<= i;
+    r = trim(r);
+  }
+  pushunsigned(L, r);
+  return 1;
+}
+
+
+static int b_lshift (lua_State *L) {
+  return b_shift(L, checkunsigned(L, 1), luaL_checkinteger(L, 2));
+}
+
+
+static int b_rshift (lua_State *L) {
+  return b_shift(L, checkunsigned(L, 1), -luaL_checkinteger(L, 2));
+}
+
+
+static int b_arshift (lua_State *L) {
+  lua_Unsigned r = checkunsigned(L, 1);
+  lua_Integer i = luaL_checkinteger(L, 2);
+  if (i < 0 || !(r & ((lua_Unsigned)1 << (LUA_NBITS - 1))))
+    return b_shift(L, r, -i);
+  else {  /* arithmetic shift for 'negative' number */
+    if (i >= LUA_NBITS) r = ALLONES;
+    else
+      r = trim((r >> i) | ~(trim(~(lua_Unsigned)0) >> i));  /* add signal bit */
+    pushunsigned(L, r);
+    return 1;
+  }
+}
+
+
+static int b_rot (lua_State *L, lua_Integer d) {
+  lua_Unsigned r = checkunsigned(L, 1);
+  int i = d & (LUA_NBITS - 1);  /* i = d % NBITS */
+  r = trim(r);
+  if (i != 0)  /* avoid undefined shift of LUA_NBITS when i == 0 */
+    r = (r << i) | (r >> (LUA_NBITS - i));
+  pushunsigned(L, trim(r));
+  return 1;
+}
+
+
+static int b_lrot (lua_State *L) {
+  return b_rot(L, luaL_checkinteger(L, 2));
+}
+
+
+static int b_rrot (lua_State *L) {
+  return b_rot(L, -luaL_checkinteger(L, 2));
+}
+
+
+/*
+** get field and width arguments for field-manipulation functions,
+** checking whether they are valid.
+** ('luaL_error' called without 'return' to avoid later warnings about
+** 'width' being used uninitialized.)
+*/
+static int fieldargs (lua_State *L, int farg, int *width) {
+  lua_Integer f = luaL_checkinteger(L, farg);
+  lua_Integer w = luaL_optinteger(L, farg + 1, 1);
+  luaL_argcheck(L, 0 <= f, farg, "field cannot be negative");
+  luaL_argcheck(L, 0 < w, farg + 1, "width must be positive");
+  if (f + w > LUA_NBITS)
+    luaL_error(L, "trying to access non-existent bits");
+  *width = (int)w;
+  return (int)f;
+}
+
+
+static int b_extract (lua_State *L) {
+  int w;
+  lua_Unsigned r = trim(checkunsigned(L, 1));
+  int f = fieldargs(L, 2, &w);
+  r = (r >> f) & mask(w);
+  pushunsigned(L, r);
+  return 1;
+}
+
+
+static int b_replace (lua_State *L) {
+  int w;
+  lua_Unsigned r = trim(checkunsigned(L, 1));
+  lua_Unsigned v = trim(checkunsigned(L, 2));
+  int f = fieldargs(L, 3, &w);
+  lua_Unsigned m = mask(w);
+  r = (r & ~(m << f)) | ((v & m) << f);
+  pushunsigned(L, r);
+  return 1;
+}
+
+
+static const luaL_Reg bitlib[] = {
+  {"arshift", b_arshift},
+  {"band", b_and},
+  {"bnot", b_not},
+  {"bor", b_or},
+  {"bxor", b_xor},
+  {"btest", b_test},
+  {"extract", b_extract},
+  {"lrotate", b_lrot},
+  {"lshift", b_lshift},
+  {"replace", b_replace},
+  {"rrotate", b_rrot},
+  {"rshift", b_rshift},
+  {NULL, NULL}
+};
+
+
+
+LUAMOD_API int luaopen_bit32 (lua_State *L) {
+  luaL_newlib(L, bitlib);
+  return 1;
+}
+
+
+#else					/* }{ */
+
+
+LUAMOD_API int luaopen_bit32 (lua_State *L) {
+  return luaL_error(L, "library 'bit32' has been deprecated");
+}
+
+#endif					/* } */

lcode.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h $
+** $Id: lcode.h,v 1.64.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -24,53 +24,40 @@
 ** grep "ORDER OPR" if you change these enums  (ORDER OP)
 */
 typedef enum BinOpr {
-  /* arithmetic operators */
   OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
-  OPR_DIV, OPR_IDIV,
-  /* bitwise operators */
+  OPR_DIV,
+  OPR_IDIV,
   OPR_BAND, OPR_BOR, OPR_BXOR,
   OPR_SHL, OPR_SHR,
-  /* string operator */
   OPR_CONCAT,
-  /* comparison operators */
   OPR_EQ, OPR_LT, OPR_LE,
   OPR_NE, OPR_GT, OPR_GE,
-  /* logical operators */
   OPR_AND, OPR_OR,
   OPR_NOBINOPR
 } BinOpr;
 
 
-/* true if operation is foldable (that is, it is arithmetic or bitwise) */
-#define foldbinop(op)	((op) <= OPR_SHR)
-
-
-#define luaK_codeABC(fs,o,a,b,c)	luaK_codeABCk(fs,o,a,b,c,0)
-
-
 typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
 
 
 /* get (pointer to) instruction of given 'expdesc' */
 #define getinstruction(fs,e)	((fs)->f->code[(e)->u.info])
 
+#define luaK_codeAsBx(fs,o,A,sBx)	luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
 
 #define luaK_setmultret(fs,e)	luaK_setreturns(fs, e, LUA_MULTRET)
 
 #define luaK_jumpto(fs,t)	luaK_patchlist(fs, luaK_jump(fs), t)
 
-LUAI_FUNC int luaK_code (FuncState *fs, Instruction i);
 LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
-LUAI_FUNC int luaK_codeAsBx (FuncState *fs, OpCode o, int A, int Bx);
-LUAI_FUNC int luaK_codeABCk (FuncState *fs, OpCode o, int A,
-                                            int B, int C, int k);
-LUAI_FUNC int luaK_isKint (expdesc *e);
-LUAI_FUNC int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v);
+LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
+LUAI_FUNC int luaK_codek (FuncState *fs, int reg, int k);
 LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
 LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
 LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
 LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
-LUAI_FUNC void luaK_int (FuncState *fs, int reg, lua_Integer n);
+LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
+LUAI_FUNC int luaK_intK (FuncState *fs, lua_Integer n);
 LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
 LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
 LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);
@@ -88,17 +75,14 @@ LUAI_FUNC int luaK_jump (FuncState *fs);
 LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
 LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
 LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
+LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level);
 LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
 LUAI_FUNC int luaK_getlabel (FuncState *fs);
 LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line);
 LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
 LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1,
                             expdesc *v2, int line);
-LUAI_FUNC void luaK_settablesize (FuncState *fs, int pc,
-                                  int ra, int asize, int hsize);
 LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
-LUAI_FUNC void luaK_finish (FuncState *fs);
-LUAI_FUNC l_noret luaK_semerror (LexState *ls, const char *msg);
 
 
 #endif

lcorolib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lcorolib.c $
+** $Id: lcorolib.c,v 1.10.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Coroutine Library
 ** See Copyright Notice in lua.h
 */
@@ -20,25 +20,26 @@
 
 static lua_State *getco (lua_State *L) {
   lua_State *co = lua_tothread(L, 1);
-  luaL_argexpected(L, co, 1, "thread");
+  luaL_argcheck(L, co, 1, "thread expected");
   return co;
 }
 
 
-/*
-** Resumes a coroutine. Returns the number of results for non-error
-** cases or -1 for errors.
-*/
 static int auxresume (lua_State *L, lua_State *co, int narg) {
-  int status, nres;
-  if (l_unlikely(!lua_checkstack(co, narg))) {
+  int status;
+  if (!lua_checkstack(co, narg)) {
     lua_pushliteral(L, "too many arguments to resume");
     return -1;  /* error flag */
   }
+  if (lua_status(co) == LUA_OK && lua_gettop(co) == 0) {
+    lua_pushliteral(L, "cannot resume dead coroutine");
+    return -1;  /* error flag */
+  }
   lua_xmove(L, co, narg);
-  status = lua_resume(co, L, narg, &nres);
-  if (l_likely(status == LUA_OK || status == LUA_YIELD)) {
-    if (l_unlikely(!lua_checkstack(L, nres + 1))) {
+  status = lua_resume(co, L, narg);
+  if (status == LUA_OK || status == LUA_YIELD) {
+    int nres = lua_gettop(co);
+    if (!lua_checkstack(L, nres + 1)) {
       lua_pop(co, nres);  /* remove results anyway */
       lua_pushliteral(L, "too many results to resume");
       return -1;  /* error flag */
@@ -57,7 +58,7 @@ static int luaB_coresume (lua_State *L) {
   lua_State *co = getco(L);
   int r;
   r = auxresume(L, co, lua_gettop(L) - 1);
-  if (l_unlikely(r < 0)) {
+  if (r < 0) {
     lua_pushboolean(L, 0);
     lua_insert(L, -2);
     return 2;  /* return false + error message */
@@ -73,16 +74,9 @@ static int luaB_coresume (lua_State *L) {
 static int luaB_auxwrap (lua_State *L) {
   lua_State *co = lua_tothread(L, lua_upvalueindex(1));
   int r = auxresume(L, co, lua_gettop(L));
-  if (l_unlikely(r < 0)) {  /* error? */
-    int stat = lua_status(co);
-    if (stat != LUA_OK && stat != LUA_YIELD) {  /* error in the coroutine? */
-      stat = lua_resetthread(co);  /* close its tbc variables */
-      lua_assert(stat != LUA_OK);
-      lua_xmove(co, L, 1);  /* copy error message */
-    }
-    if (stat != LUA_ERRMEM &&  /* not a memory error and ... */
-        lua_type(L, -1) == LUA_TSTRING) {  /* ... error object is a string? */
-      luaL_where(L, 1);  /* add extra info, if available */
+  if (r < 0) {
+    if (lua_type(L, -1) == LUA_TSTRING) {  /* error object is a string? */
+      luaL_where(L, 1);  /* add extra info */
       lua_insert(L, -2);
       lua_concat(L, 2);
     }
@@ -114,48 +108,35 @@ static int luaB_yield (lua_State *L) {
 }
 
 
-#define COS_RUN		0
-#define COS_DEAD	1
-#define COS_YIELD	2
-#define COS_NORM	3
-
-
-static const char *const statname[] =
-  {"running", "dead", "suspended", "normal"};
-
-
-static int auxstatus (lua_State *L, lua_State *co) {
-  if (L == co) return COS_RUN;
+static int luaB_costatus (lua_State *L) {
+  lua_State *co = getco(L);
+  if (L == co) lua_pushliteral(L, "running");
   else {
     switch (lua_status(co)) {
       case LUA_YIELD:
-        return COS_YIELD;
+        lua_pushliteral(L, "suspended");
+        break;
       case LUA_OK: {
         lua_Debug ar;
-        if (lua_getstack(co, 0, &ar))  /* does it have frames? */
-          return COS_NORM;  /* it is running */
+        if (lua_getstack(co, 0, &ar) > 0)  /* does it have frames? */
+          lua_pushliteral(L, "normal");  /* it is running */
         else if (lua_gettop(co) == 0)
-            return COS_DEAD;
+            lua_pushliteral(L, "dead");
         else
-          return COS_YIELD;  /* initial state */
+          lua_pushliteral(L, "suspended");  /* initial state */
+        break;
       }
       default:  /* some error occurred */
-        return COS_DEAD;
+        lua_pushliteral(L, "dead");
+        break;
     }
   }
-}
-
-
-static int luaB_costatus (lua_State *L) {
-  lua_State *co = getco(L);
-  lua_pushstring(L, statname[auxstatus(L, co)]);
   return 1;
 }
 
 
 static int luaB_yieldable (lua_State *L) {
-  lua_State *co = lua_isnone(L, 1) ? L : getco(L);
-  lua_pushboolean(L, lua_isyieldable(co));
+  lua_pushboolean(L, lua_isyieldable(L));
   return 1;
 }
 
@@ -167,28 +148,6 @@ static int luaB_corunning (lua_State *L) {
 }
 
 
-static int luaB_close (lua_State *L) {
-  lua_State *co = getco(L);
-  int status = auxstatus(L, co);
-  switch (status) {
-    case COS_DEAD: case COS_YIELD: {
-      status = lua_resetthread(co);
-      if (status == LUA_OK) {
-        lua_pushboolean(L, 1);
-        return 1;
-      }
-      else {
-        lua_pushboolean(L, 0);
-        lua_xmove(co, L, 1);  /* copy error message */
-        return 2;
-      }
-    }
-    default:  /* normal or running coroutine */
-      return luaL_error(L, "cannot close a %s coroutine", statname[status]);
-  }
-}
-
-
 static const luaL_Reg co_funcs[] = {
   {"create", luaB_cocreate},
   {"resume", luaB_coresume},
@@ -197,7 +156,6 @@ static const luaL_Reg co_funcs[] = {
   {"wrap", luaB_cowrap},
   {"yield", luaB_yield},
   {"isyieldable", luaB_yieldable},
-  {"close", luaB_close},
   {NULL, NULL}
 };
 

lctype.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lctype.c $
+** $Id: lctype.c,v 1.12.1.1 2017/04/19 17:20:42 roberto Exp $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */
@@ -16,15 +16,6 @@
 
 #include <limits.h>
 
-
-#if defined (LUA_UCID)		/* accept UniCode IDentifiers? */
-/* consider all non-ascii codepoints to be alphabetic */
-#define NONA		0x01
-#else
-#define NONA		0x00	/* default */
-#endif
-
-
 LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = {
   0x00,  /* EOZ */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 0. */
@@ -43,22 +34,22 @@ LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = {
   0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,
   0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,	/* 7. */
   0x05,  0x05,  0x05,  0x04,  0x04,  0x04,  0x04,  0x00,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* 8. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* 9. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* a. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* b. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  0x00,  0x00,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* c. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* d. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,	/* e. */
-  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,  NONA,
-  NONA,  NONA,  NONA,  NONA,  NONA,  0x00,  0x00,  0x00,	/* f. */
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 8. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 9. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* a. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* b. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* c. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* d. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* e. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* f. */
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
 };
 
 #endif			/* } */

lctype.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lctype.h $
+** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */
@@ -13,7 +13,7 @@
 /*
 ** WARNING: the functions defined here do not necessarily correspond
 ** to the similar functions in the standard C ctype.h. They are
-** optimized for the specific needs of Lua.
+** optimized for the specific needs of Lua
 */
 
 #if !defined(LUA_USE_CTYPE)
@@ -61,20 +61,14 @@
 #define lisprint(c)	testprop(c, MASK(PRINTBIT))
 #define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
 
-
 /*
-** In ASCII, this 'ltolower' is correct for alphabetic characters and
-** for '.'. That is enough for Lua needs. ('check_exp' ensures that
-** the character either is an upper-case letter or is unchanged by
-** the transformation, which holds for lower-case letters and '.'.)
+** this 'ltolower' only works for alphabetic characters
 */
-#define ltolower(c)  \
-  check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')),  \
-            (c) | ('A' ^ 'a'))
+#define ltolower(c)	((c) | ('A' ^ 'a'))
 
 
-/* one entry for each character and for -1 (EOZ) */
-LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];)
+/* two more entries for 0 and -1 (EOZ) */
+LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
 
 
 #else			/* }{ */

ldblib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c $
+** $Id: ldblib.c,v 1.151.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -21,10 +21,10 @@
 
 
 /*
-** The hook table at registry[HOOKKEY] maps threads to their current
-** hook function.
+** The hook table at registry[&HOOKKEY] maps threads to their current
+** hook function. (We only need the unique address of 'HOOKKEY'.)
 */
-static const char *const HOOKKEY = "_HOOKKEY";
+static const int HOOKKEY = 0;
 
 
 /*
@@ -33,7 +33,7 @@ static const char *const HOOKKEY = "_HOOKKEY";
 ** checked.
 */
 static void checkstack (lua_State *L, lua_State *L1, int n) {
-  if (l_unlikely(L != L1 && !lua_checkstack(L1, n)))
+  if (L != L1 && !lua_checkstack(L1, n))
     luaL_error(L, "stack overflow");
 }
 
@@ -55,7 +55,8 @@ static int db_getmetatable (lua_State *L) {
 
 static int db_setmetatable (lua_State *L) {
   int t = lua_type(L, 2);
-  luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
+  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
+                    "nil or table expected");
   lua_settop(L, 2);
   lua_setmetatable(L, 1);
   return 1;  /* return 1st argument */
@@ -63,24 +64,19 @@ static int db_setmetatable (lua_State *L) {
 
 
 static int db_getuservalue (lua_State *L) {
-  int n = (int)luaL_optinteger(L, 2, 1);
   if (lua_type(L, 1) != LUA_TUSERDATA)
-    luaL_pushfail(L);
-  else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) {
-    lua_pushboolean(L, 1);
-    return 2;
-  }
+    lua_pushnil(L);
+  else
+    lua_getuservalue(L, 1);
   return 1;
 }
 
 
 static int db_setuservalue (lua_State *L) {
-  int n = (int)luaL_optinteger(L, 3, 1);
   luaL_checktype(L, 1, LUA_TUSERDATA);
   luaL_checkany(L, 2);
   lua_settop(L, 2);
-  if (!lua_setiuservalue(L, 1, n))
-    luaL_pushfail(L);
+  lua_setuservalue(L, 1);
   return 1;
 }
 
@@ -150,9 +146,8 @@ static int db_getinfo (lua_State *L) {
   lua_Debug ar;
   int arg;
   lua_State *L1 = getthread(L, &arg);
-  const char *options = luaL_optstring(L, arg+2, "flnSrtu");
+  const char *options = luaL_optstring(L, arg+2, "flnStu");
   checkstack(L, L1, 3);
-  luaL_argcheck(L, options[0] != '>', arg + 2, "invalid option '>'");
   if (lua_isfunction(L, arg + 1)) {  /* info about a function? */
     options = lua_pushfstring(L, ">%s", options);  /* add '>' to 'options' */
     lua_pushvalue(L, arg + 1);  /* move function to 'L1' stack */
@@ -160,7 +155,7 @@ static int db_getinfo (lua_State *L) {
   }
   else {  /* stack level */
     if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
-      luaL_pushfail(L);  /* level out of range */
+      lua_pushnil(L);  /* level out of range */
       return 1;
     }
   }
@@ -168,8 +163,7 @@ static int db_getinfo (lua_State *L) {
     return luaL_argerror(L, arg+2, "invalid option");
   lua_newtable(L);  /* table to collect results */
   if (strchr(options, 'S')) {
-    lua_pushlstring(L, ar.source, ar.srclen);
-    lua_setfield(L, -2, "source");
+    settabss(L, "source", ar.source);
     settabss(L, "short_src", ar.short_src);
     settabsi(L, "linedefined", ar.linedefined);
     settabsi(L, "lastlinedefined", ar.lastlinedefined);
@@ -186,10 +180,6 @@ static int db_getinfo (lua_State *L) {
     settabss(L, "name", ar.name);
     settabss(L, "namewhat", ar.namewhat);
   }
-  if (strchr(options, 'r')) {
-    settabsi(L, "ftransfer", ar.ftransfer);
-    settabsi(L, "ntransfer", ar.ntransfer);
-  }
   if (strchr(options, 't'))
     settabsb(L, "istailcall", ar.istailcall);
   if (strchr(options, 'L'))
@@ -203,6 +193,8 @@ static int db_getinfo (lua_State *L) {
 static int db_getlocal (lua_State *L) {
   int arg;
   lua_State *L1 = getthread(L, &arg);
+  lua_Debug ar;
+  const char *name;
   int nvar = (int)luaL_checkinteger(L, arg + 2);  /* local-variable index */
   if (lua_isfunction(L, arg + 1)) {  /* function argument? */
     lua_pushvalue(L, arg + 1);  /* push function */
@@ -210,10 +202,8 @@ static int db_getlocal (lua_State *L) {
     return 1;  /* return only name (there is no value) */
   }
   else {  /* stack-level argument */
-    lua_Debug ar;
-    const char *name;
     int level = (int)luaL_checkinteger(L, arg + 1);
-    if (l_unlikely(!lua_getstack(L1, level, &ar)))  /* out of range? */
+    if (!lua_getstack(L1, level, &ar))  /* out of range? */
       return luaL_argerror(L, arg+1, "level out of range");
     checkstack(L, L1, 1);
     name = lua_getlocal(L1, &ar, nvar);
@@ -224,7 +214,7 @@ static int db_getlocal (lua_State *L) {
       return 2;
     }
     else {
-      luaL_pushfail(L);  /* no name (nor value) */
+      lua_pushnil(L);  /* no name (nor value) */
       return 1;
     }
   }
@@ -238,7 +228,7 @@ static int db_setlocal (lua_State *L) {
   lua_Debug ar;
   int level = (int)luaL_checkinteger(L, arg + 1);
   int nvar = (int)luaL_checkinteger(L, arg + 2);
-  if (l_unlikely(!lua_getstack(L1, level, &ar)))  /* out of range? */
+  if (!lua_getstack(L1, level, &ar))  /* out of range? */
     return luaL_argerror(L, arg+1, "level out of range");
   luaL_checkany(L, arg+3);
   lua_settop(L, arg+3);
@@ -282,33 +272,25 @@ static int db_setupvalue (lua_State *L) {
 ** Check whether a given upvalue from a given closure exists and
 ** returns its index
 */
-static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) {
-  void *id;
+static int checkupval (lua_State *L, int argf, int argnup) {
   int nup = (int)luaL_checkinteger(L, argnup);  /* upvalue index */
   luaL_checktype(L, argf, LUA_TFUNCTION);  /* closure */
-  id = lua_upvalueid(L, argf, nup);
-  if (pnup) {
-    luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index");
-    *pnup = nup;
-  }
-  return id;
+  luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup,
+                   "invalid upvalue index");
+  return nup;
 }
 
 
 static int db_upvalueid (lua_State *L) {
-  void *id = checkupval(L, 1, 2, NULL);
-  if (id != NULL)
-    lua_pushlightuserdata(L, id);
-  else
-    luaL_pushfail(L);
+  int n = checkupval(L, 1, 2);
+  lua_pushlightuserdata(L, lua_upvalueid(L, 1, n));
   return 1;
 }
 
 
 static int db_upvaluejoin (lua_State *L) {
-  int n1, n2;
-  checkupval(L, 1, 2, &n1);
-  checkupval(L, 3, 4, &n2);
+  int n1 = checkupval(L, 1, 2);
+  int n2 = checkupval(L, 3, 4);
   luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
   luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
   lua_upvaluejoin(L, 1, n1, 3, n2);
@@ -323,7 +305,7 @@ static int db_upvaluejoin (lua_State *L) {
 static void hookf (lua_State *L, lua_Debug *ar) {
   static const char *const hooknames[] =
     {"call", "return", "line", "count", "tail call"};
-  lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
+  lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
   lua_pushthread(L);
   if (lua_rawget(L, -2) == LUA_TFUNCTION) {  /* is there a hook function? */
     lua_pushstring(L, hooknames[(int)ar->event]);  /* push event name */
@@ -376,12 +358,14 @@ static int db_sethook (lua_State *L) {
     count = (int)luaL_optinteger(L, arg + 3, 0);
     func = hookf; mask = makemask(smask, count);
   }
-  if (!luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)) {
-    /* table just created; initialize it */
-    lua_pushliteral(L, "k");
+  if (lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY) == LUA_TNIL) {
+    lua_createtable(L, 0, 2);  /* create a hook table */
+    lua_pushvalue(L, -1);
+    lua_rawsetp(L, LUA_REGISTRYINDEX, &HOOKKEY);  /* set it in position */
+    lua_pushstring(L, "k");
     lua_setfield(L, -2, "__mode");  /** hooktable.__mode = "k" */
     lua_pushvalue(L, -1);
-    lua_setmetatable(L, -2);  /* metatable(hooktable) = hooktable */
+    lua_setmetatable(L, -2);  /* setmetatable(hooktable) = hooktable */
   }
   checkstack(L, L1, 1);
   lua_pushthread(L1); lua_xmove(L1, L, 1);  /* key (thread) */
@@ -398,14 +382,12 @@ static int db_gethook (lua_State *L) {
   char buff[5];
   int mask = lua_gethookmask(L1);
   lua_Hook hook = lua_gethook(L1);
-  if (hook == NULL) {  /* no hook? */
-    luaL_pushfail(L);
-    return 1;
-  }
+  if (hook == NULL)  /* no hook? */
+    lua_pushnil(L);
   else if (hook != hookf)  /* external hook? */
     lua_pushliteral(L, "external hook");
   else {  /* hook table must exist */
-    lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
+    lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
     checkstack(L, L1, 1);
     lua_pushthread(L1); lua_xmove(L1, L, 1);
     lua_rawget(L, -2);   /* 1st result = hooktable[L1] */
@@ -421,12 +403,12 @@ static int db_debug (lua_State *L) {
   for (;;) {
     char buffer[250];
     lua_writestringerror("%s", "lua_debug> ");
-    if (fgets(buffer, sizeof(buffer), stdin) == NULL ||
+    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
         strcmp(buffer, "cont\n") == 0)
       return 0;
     if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
         lua_pcall(L, 0, 0, 0))
-      lua_writestringerror("%s\n", luaL_tolstring(L, -1, NULL));
+      lua_writestringerror("%s\n", lua_tostring(L, -1));
     lua_settop(L, 0);  /* remove eventual returns */
   }
 }
@@ -446,14 +428,6 @@ static int db_traceback (lua_State *L) {
 }
 
 
-static int db_setcstacklimit (lua_State *L) {
-  int limit = (int)luaL_checkinteger(L, 1);
-  int res = lua_setcstacklimit(L, limit);
-  lua_pushinteger(L, res);
-  return 1;
-}
-
-
 static const luaL_Reg dblib[] = {
   {"debug", db_debug},
   {"getuservalue", db_getuservalue},
@@ -471,7 +445,6 @@ static const luaL_Reg dblib[] = {
   {"setmetatable", db_setmetatable},
   {"setupvalue", db_setupvalue},
   {"traceback", db_traceback},
-  {"setcstacklimit", db_setcstacklimit},
   {NULL, NULL}
 };
 

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c $
+** $Id: ldebug.c,v 2.121.1.2 2017/07/10 17:21:50 roberto Exp $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -31,7 +31,11 @@
 
 
 
-#define noLuaClosure(f)		((f) == NULL || (f)->c.tt == LUA_VCCL)
+#define noLuaClosure(f)		((f) == NULL || (f)->c.tt == LUA_TCCL)
+
+
+/* Active Lua function (given call info) */
+#define ci_func(ci)		(clLvalue((ci)->func))
 
 
 static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
@@ -44,101 +48,47 @@ static int currentpc (CallInfo *ci) {
 }
 
 
+static int currentline (CallInfo *ci) {
+  return getfuncline(ci_func(ci)->p, currentpc(ci));
+}
+
+
 /*
-** Get a "base line" to find the line corresponding to an instruction.
-** Base lines are regularly placed at MAXIWTHABS intervals, so usually
-** an integer division gets the right place. When the source file has
-** large sequences of empty/comment lines, it may need extra entries,
-** so the original estimate needs a correction.
-** If the original estimate is -1, the initial 'if' ensures that the
-** 'while' will run at least once.
-** The assertion that the estimate is a lower bound for the correct base
-** is valid as long as the debug info has been generated with the same
-** value for MAXIWTHABS or smaller. (Previous releases use a little
-** smaller value.)
+** If function yielded, its 'func' can be in the 'extra' field. The
+** next function restores 'func' to its correct value for debugging
+** purposes. (It exchanges 'func' and 'extra'; so, when called again,
+** after debugging, it also "re-restores" ** 'func' to its altered value.
 */
-static int getbaseline (const Proto *f, int pc, int *basepc) {
-  if (f->sizeabslineinfo == 0 || pc < f->abslineinfo[0].pc) {
-    *basepc = -1;  /* start from the beginning */
-    return f->linedefined;
-  }
-  else {
-    int i = cast_uint(pc) / MAXIWTHABS - 1;  /* get an estimate */
-    /* estimate must be a lower bond of the correct base */
-    lua_assert(i < 0 ||
-              (i < f->sizeabslineinfo && f->abslineinfo[i].pc <= pc));
-    while (i + 1 < f->sizeabslineinfo && pc >= f->abslineinfo[i + 1].pc)
-      i++;  /* low estimate; adjust it */
-    *basepc = f->abslineinfo[i].pc;
-    return f->abslineinfo[i].line;
+static void swapextra (lua_State *L) {
+  if (L->status == LUA_YIELD) {
+    CallInfo *ci = L->ci;  /* get function that yielded */
+    StkId temp = ci->func;  /* exchange its 'func' and 'extra' values */
+    ci->func = restorestack(L, ci->extra);
+    ci->extra = savestack(L, temp);
   }
 }
 
 
 /*
-** Get the line corresponding to instruction 'pc' in function 'f';
-** first gets a base line and from there does the increments until
-** the desired instruction.
-*/
-int luaG_getfuncline (const Proto *f, int pc) {
-  if (f->lineinfo == NULL)  /* no debug information? */
-    return -1;
-  else {
-    int basepc;
-    int baseline = getbaseline(f, pc, &basepc);
-    while (basepc++ < pc) {  /* walk until given instruction */
-      lua_assert(f->lineinfo[basepc] != ABSLINEINFO);
-      baseline += f->lineinfo[basepc];  /* correct line */
-    }
-    return baseline;
-  }
-}
-
-
-static int getcurrentline (CallInfo *ci) {
-  return luaG_getfuncline(ci_func(ci)->p, currentpc(ci));
-}
-
-
-/*
-** Set 'trap' for all active Lua frames.
-** This function can be called during a signal, under "reasonable"
-** assumptions. A new 'ci' is completely linked in the list before it
-** becomes part of the "active" list, and we assume that pointers are
-** atomic; see comment in next function.
-** (A compiler doing interprocedural optimizations could, theoretically,
-** reorder memory writes in such a way that the list could be
-** temporarily broken while inserting a new element. We simply assume it
-** has no good reasons to do that.)
-*/
-static void settraps (CallInfo *ci) {
-  for (; ci != NULL; ci = ci->previous)
-    if (isLua(ci))
-      ci->u.l.trap = 1;
-}
-
-
-/*
-** This function can be called during a signal, under "reasonable"
-** assumptions.
-** Fields 'basehookcount' and 'hookcount' (set by 'resethookcount')
-** are for debug only, and it is no problem if they get arbitrary
-** values (causes at most one wrong hook call). 'hookmask' is an atomic
-** value. We assume that pointers are atomic too (e.g., gcc ensures that
-** for all platforms where it runs). Moreover, 'hook' is always checked
-** before being called (see 'luaD_hook').
+** This function can be called asynchronously (e.g. during a signal).
+** Fields 'oldpc', 'basehookcount', and 'hookcount' (set by
+** 'resethookcount') are for debug only, and it is no problem if they
+** get arbitrary values (causes at most one wrong hook call). 'hookmask'
+** is an atomic value. We assume that pointers are atomic too (e.g., gcc
+** ensures that for all platforms where it runs). Moreover, 'hook' is
+** always checked before being called (see 'luaD_hook').
 */
 LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
   if (func == NULL || mask == 0) {  /* turn off hooks? */
     mask = 0;
     func = NULL;
   }
+  if (isLua(L->ci))
+    L->oldpc = L->ci->u.l.savedpc;
   L->hook = func;
   L->basehookcount = count;
   resethookcount(L);
   L->hookmask = cast_byte(mask);
-  if (mask)
-    settraps(L->ci);  /* to trace inside 'luaV_execute' */
 }
 
 
@@ -174,7 +124,7 @@ LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
 }
 
 
-static const char *upvalname (const Proto *p, int uv) {
+static const char *upvalname (Proto *p, int uv) {
   TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
   if (s == NULL) return "?";
   else return getstr(s);
@@ -182,37 +132,39 @@ static const char *upvalname (const Proto *p, int uv) {
 
 
 static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
-  if (clLvalue(s2v(ci->func))->p->is_vararg) {
-    int nextra = ci->u.l.nextraargs;
-    if (n >= -nextra) {  /* 'n' is negative */
-      *pos = ci->func - nextra - (n + 1);
-      return "(vararg)";  /* generic name for any vararg */
-    }
+  int nparams = clLvalue(ci->func)->p->numparams;
+  int nvararg = cast_int(ci->u.l.base - ci->func) - nparams;
+  if (n <= -nvararg)
+    return NULL;  /* no such vararg */
+  else {
+    *pos = ci->func + nparams - n;
+    return "(*vararg)";  /* generic name for any vararg */
   }
-  return NULL;  /* no such vararg */
 }
 
 
-const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos) {
-  StkId base = ci->func + 1;
+static const char *findlocal (lua_State *L, CallInfo *ci, int n,
+                              StkId *pos) {
   const char *name = NULL;
+  StkId base;
   if (isLua(ci)) {
     if (n < 0)  /* access to vararg values? */
       return findvararg(ci, n, pos);
-    else
+    else {
+      base = ci->u.l.base;
       name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
+    }
   }
+  else
+    base = ci->func + 1;
   if (name == NULL) {  /* no 'standard' name? */
     StkId limit = (ci == L->ci) ? L->top : ci->next->func;
-    if (limit - base >= n && n > 0) {  /* is 'n' inside 'ci' stack? */
-      /* generic name for any valid slot */
-      name = isLua(ci) ? "(temporary)" : "(C temporary)";
-    }
+    if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
+      name = "(*temporary)";  /* generic name for any valid slot */
     else
       return NULL;  /* no name */
   }
-  if (pos)
-    *pos = base + (n - 1);
+  *pos = base + (n - 1);
   return name;
 }
 
@@ -220,20 +172,22 @@ const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos) {
 LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
   const char *name;
   lua_lock(L);
+  swapextra(L);
   if (ar == NULL) {  /* information about non-active function? */
-    if (!isLfunction(s2v(L->top - 1)))  /* not a Lua function? */
+    if (!isLfunction(L->top - 1))  /* not a Lua function? */
       name = NULL;
     else  /* consider live variables at function start (parameters) */
-      name = luaF_getlocalname(clLvalue(s2v(L->top - 1))->p, n, 0);
+      name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
   }
   else {  /* active function; get information through 'ar' */
     StkId pos = NULL;  /* to avoid warnings */
-    name = luaG_findlocal(L, ar->i_ci, n, &pos);
+    name = findlocal(L, ar->i_ci, n, &pos);
     if (name) {
-      setobjs2s(L, L->top, pos);
+      setobj2s(L, L->top, pos);
       api_incr_top(L);
     }
   }
+  swapextra(L);
   lua_unlock(L);
   return name;
 }
@@ -243,11 +197,13 @@ LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
   StkId pos = NULL;  /* to avoid warnings */
   const char *name;
   lua_lock(L);
-  name = luaG_findlocal(L, ar->i_ci, n, &pos);
+  swapextra(L);
+  name = findlocal(L, ar->i_ci, n, &pos);
   if (name) {
     setobjs2s(L, pos, L->top - 1);
     L->top--;  /* pop value */
   }
+  swapextra(L);
   lua_unlock(L);
   return name;
 }
@@ -256,55 +212,36 @@ LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
 static void funcinfo (lua_Debug *ar, Closure *cl) {
   if (noLuaClosure(cl)) {
     ar->source = "=[C]";
-    ar->srclen = LL("=[C]");
     ar->linedefined = -1;
     ar->lastlinedefined = -1;
     ar->what = "C";
   }
   else {
-    const Proto *p = cl->l.p;
-    if (p->source) {
-      ar->source = getstr(p->source);
-      ar->srclen = tsslen(p->source);
-    }
-    else {
-      ar->source = "=?";
-      ar->srclen = LL("=?");
-    }
+    Proto *p = cl->l.p;
+    ar->source = p->source ? getstr(p->source) : "=?";
     ar->linedefined = p->linedefined;
     ar->lastlinedefined = p->lastlinedefined;
     ar->what = (ar->linedefined == 0) ? "main" : "Lua";
   }
-  luaO_chunkid(ar->short_src, ar->source, ar->srclen);
-}
-
-
-static int nextline (const Proto *p, int currentline, int pc) {
-  if (p->lineinfo[pc] != ABSLINEINFO)
-    return currentline + p->lineinfo[pc];
-  else
-    return luaG_getfuncline(p, pc);
+  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
 }
 
 
 static void collectvalidlines (lua_State *L, Closure *f) {
   if (noLuaClosure(f)) {
-    setnilvalue(s2v(L->top));
+    setnilvalue(L->top);
     api_incr_top(L);
   }
   else {
     int i;
     TValue v;
-    const Proto *p = f->l.p;
-    int currentline = p->linedefined;
+    int *lineinfo = f->l.p->lineinfo;
     Table *t = luaH_new(L);  /* new table to store active lines */
-    sethvalue2s(L, L->top, t);  /* push it on stack */
+    sethvalue(L, L->top, t);  /* push it on stack */
     api_incr_top(L);
-    setbtvalue(&v);  /* boolean 'true' to be the value of all indices */
-    for (i = 0; i < p->sizelineinfo; i++) {  /* for all instructions */
-      currentline = nextline(p, currentline, i);  /* get its line */
-      luaH_setint(L, t, currentline, &v);  /* table[line] = true */
-    }
+    setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */
+    for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */
+      luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */
   }
 }
 
@@ -333,7 +270,7 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
         break;
       }
       case 'l': {
-        ar->currentline = (ci && isLua(ci)) ? getcurrentline(ci) : -1;
+        ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;
         break;
       }
       case 'u': {
@@ -360,15 +297,6 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
         }
         break;
       }
-      case 'r': {
-        if (ci == NULL || !(ci->callstatus & CIST_TRAN))
-          ar->ftransfer = ar->ntransfer = 0;
-        else {
-          ar->ftransfer = ci->u2.transferinfo.ftransfer;
-          ar->ntransfer = ci->u2.transferinfo.ntransfer;
-        }
-        break;
-      }
       case 'L':
       case 'f':  /* handled by lua_getinfo */
         break;
@@ -383,26 +311,28 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
   int status;
   Closure *cl;
   CallInfo *ci;
-  TValue *func;
+  StkId func;
   lua_lock(L);
+  swapextra(L);
   if (*what == '>') {
     ci = NULL;
-    func = s2v(L->top - 1);
+    func = L->top - 1;
     api_check(L, ttisfunction(func), "function expected");
     what++;  /* skip the '>' */
     L->top--;  /* pop function */
   }
   else {
     ci = ar->i_ci;
-    func = s2v(ci->func);
-    lua_assert(ttisfunction(func));
+    func = ci->func;
+    lua_assert(ttisfunction(ci->func));
   }
   cl = ttisclosure(func) ? clvalue(func) : NULL;
   status = auxgetinfo(L, what, ar, cl, ci);
   if (strchr(what, 'f')) {
-    setobj2s(L, L->top, func);
+    setobjs2s(L, L->top, func);
     api_incr_top(L);
   }
+  swapextra(L);  /* correct before option 'L', which can raise a mem. error */
   if (strchr(what, 'L'))
     collectvalidlines(L, cl);
   lua_unlock(L);
@@ -416,38 +346,30 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
 ** =======================================================
 */
 
-static const char *getobjname (const Proto *p, int lastpc, int reg,
+static const char *getobjname (Proto *p, int lastpc, int reg,
                                const char **name);
 
 
 /*
-** Find a "name" for the constant 'c'.
+** find a "name" for the RK value 'c'
 */
-static void kname (const Proto *p, int c, const char **name) {
-  TValue *kvalue = &p->k[c];
-  *name = (ttisstring(kvalue)) ? svalue(kvalue) : "?";
-}
-
-
-/*
-** Find a "name" for the register 'c'.
-*/
-static void rname (const Proto *p, int pc, int c, const char **name) {
-  const char *what = getobjname(p, pc, c, name); /* search for 'c' */
-  if (!(what && *what == 'c'))  /* did not find a constant name? */
-    *name = "?";
-}
-
-
-/*
-** Find a "name" for a 'C' value in an RK instruction.
-*/
-static void rkname (const Proto *p, int pc, Instruction i, const char **name) {
-  int c = GETARG_C(i);  /* key index */
-  if (GETARG_k(i))  /* is 'c' a constant? */
-    kname(p, c, name);
-  else  /* 'c' is a register */
-    rname(p, pc, c, name);
+static void kname (Proto *p, int pc, int c, const char **name) {
+  if (ISK(c)) {  /* is 'c' a constant? */
+    TValue *kvalue = &p->k[INDEXK(c)];
+    if (ttisstring(kvalue)) {  /* literal constant? */
+      *name = svalue(kvalue);  /* it is its own name */
+      return;
+    }
+    /* else no reasonable name found */
+  }
+  else {  /* 'c' is a register */
+    const char *what = getobjname(p, pc, c, name); /* search for 'c' */
+    if (what && *what == 'c') {  /* found a constant name? */
+      return;  /* 'name' already filled */
+    }
+    /* else no reasonable name found */
+  }
+  *name = "?";  /* no reasonable name found */
 }
 
 
@@ -459,70 +381,55 @@ static int filterpc (int pc, int jmptarget) {
 
 
 /*
-** Try to find last instruction before 'lastpc' that modified register 'reg'.
+** try to find last instruction before 'lastpc' that modified register 'reg'
 */
-static int findsetreg (const Proto *p, int lastpc, int reg) {
+static int findsetreg (Proto *p, int lastpc, int reg) {
   int pc;
   int setreg = -1;  /* keep last instruction that changed 'reg' */
   int jmptarget = 0;  /* any code before this address is conditional */
-  if (testMMMode(GET_OPCODE(p->code[lastpc])))
-    lastpc--;  /* previous instruction was not actually executed */
   for (pc = 0; pc < lastpc; pc++) {
     Instruction i = p->code[pc];
     OpCode op = GET_OPCODE(i);
     int a = GETARG_A(i);
-    int change;  /* true if current instruction changed 'reg' */
     switch (op) {
-      case OP_LOADNIL: {  /* set registers from 'a' to 'a+b' */
+      case OP_LOADNIL: {
         int b = GETARG_B(i);
-        change = (a <= reg && reg <= a + b);
+        if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
+          setreg = filterpc(pc, jmptarget);
         break;
       }
-      case OP_TFORCALL: {  /* affect all regs above its base */
-        change = (reg >= a + 2);
+      case OP_TFORCALL: {
+        if (reg >= a + 2)  /* affect all regs above its base */
+          setreg = filterpc(pc, jmptarget);
         break;
       }
       case OP_CALL:
-      case OP_TAILCALL: {  /* affect all registers above base */
-        change = (reg >= a);
+      case OP_TAILCALL: {
+        if (reg >= a)  /* affect all registers above base */
+          setreg = filterpc(pc, jmptarget);
         break;
       }
-      case OP_JMP: {  /* doesn't change registers, but changes 'jmptarget' */
-        int b = GETARG_sJ(i);
+      case OP_JMP: {
+        int b = GETARG_sBx(i);
         int dest = pc + 1 + b;
-        /* jump does not skip 'lastpc' and is larger than current one? */
-        if (dest <= lastpc && dest > jmptarget)
-          jmptarget = dest;  /* update 'jmptarget' */
-        change = 0;
+        /* jump is forward and do not skip 'lastpc'? */
+        if (pc < dest && dest <= lastpc) {
+          if (dest > jmptarget)
+            jmptarget = dest;  /* update 'jmptarget' */
+        }
         break;
       }
-      default:  /* any instruction that sets A */
-        change = (testAMode(op) && reg == a);
+      default:
+        if (testAMode(op) && reg == a)  /* any instruction that set A */
+          setreg = filterpc(pc, jmptarget);
         break;
     }
-    if (change)
-      setreg = filterpc(pc, jmptarget);
   }
   return setreg;
 }
 
 
-/*
-** Check whether table being indexed by instruction 'i' is the
-** environment '_ENV'
-*/
-static const char *gxf (const Proto *p, int pc, Instruction i, int isup) {
-  int t = GETARG_B(i);  /* table index */
-  const char *name;  /* name of indexed variable */
-  if (isup)  /* is an upvalue? */
-    name = upvalname(p, t);
-  else
-    getobjname(p, pc, t, &name);
-  return (name && strcmp(name, LUA_ENV) == 0) ? "global" : "field";
-}
-
-
-static const char *getobjname (const Proto *p, int lastpc, int reg,
+static const char *getobjname (Proto *p, int lastpc, int reg,
                                const char **name) {
   int pc;
   *name = luaF_getlocalname(p, reg + 1, lastpc);
@@ -540,24 +447,15 @@ static const char *getobjname (const Proto *p, int lastpc, int reg,
           return getobjname(p, pc, b, name);  /* get name for 'b' */
         break;
       }
-      case OP_GETTABUP: {
-        int k = GETARG_C(i);  /* key index */
-        kname(p, k, name);
-        return gxf(p, pc, i, 1);
-      }
+      case OP_GETTABUP:
       case OP_GETTABLE: {
         int k = GETARG_C(i);  /* key index */
-        rname(p, pc, k, name);
-        return gxf(p, pc, i, 0);
-      }
-      case OP_GETI: {
-        *name = "integer index";
-        return "field";
-      }
-      case OP_GETFIELD: {
-        int k = GETARG_C(i);  /* key index */
-        kname(p, k, name);
-        return gxf(p, pc, i, 0);
+        int t = GETARG_B(i);  /* table index */
+        const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */
+                         ? luaF_getlocalname(p, t + 1, pc)
+                         : upvalname(p, t);
+        kname(p, pc, k, name);
+        return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
       }
       case OP_GETUPVAL: {
         *name = upvalname(p, GETARG_B(i));
@@ -574,7 +472,8 @@ static const char *getobjname (const Proto *p, int lastpc, int reg,
         break;
       }
       case OP_SELF: {
-        rkname(p, pc, i, name);
+        int k = GETARG_C(i);  /* key index */
+        kname(p, pc, k, name);
         return "method";
       }
       default: break;  /* go through to return NULL */
@@ -593,7 +492,7 @@ static const char *getobjname (const Proto *p, int lastpc, int reg,
 static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
                                      const char **name) {
   TMS tm = (TMS)0;  /* (initial value avoids warnings) */
-  const Proto *p = ci_func(ci)->p;  /* calling function */
+  Proto *p = ci_func(ci)->p;  /* calling function */
   int pc = currentpc(ci);  /* calling instruction index */
   Instruction i = p->code[pc];  /* calling instruction */
   if (ci->callstatus & CIST_HOOKED) {  /* was it called inside a hook? */
@@ -610,14 +509,16 @@ static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
     }
     /* other instructions can do calls through metamethods */
     case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
-    case OP_GETI: case OP_GETFIELD:
       tm = TM_INDEX;
       break;
-    case OP_SETTABUP: case OP_SETTABLE: case OP_SETI: case OP_SETFIELD:
+    case OP_SETTABUP: case OP_SETTABLE:
       tm = TM_NEWINDEX;
       break;
-    case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: {
-      tm = cast(TMS, GETARG_C(i));
+    case OP_ADD: case OP_SUB: case OP_MUL: case OP_MOD:
+    case OP_POW: case OP_DIV: case OP_IDIV: case OP_BAND:
+    case OP_BOR: case OP_BXOR: case OP_SHL: case OP_SHR: {
+      int offset = cast_int(GET_OPCODE(i)) - cast_int(OP_ADD);  /* ORDER OP */
+      tm = cast(TMS, offset + cast_int(TM_ADD));  /* ORDER TM */
       break;
     }
     case OP_UNM: tm = TM_UNM; break;
@@ -625,14 +526,12 @@ static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
     case OP_LEN: tm = TM_LEN; break;
     case OP_CONCAT: tm = TM_CONCAT; break;
     case OP_EQ: tm = TM_EQ; break;
-    /* no cases for OP_EQI and OP_EQK, as they don't call metamethods */
-    case OP_LT: case OP_LTI: case OP_GTI: tm = TM_LT; break;
-    case OP_LE: case OP_LEI: case OP_GEI: tm = TM_LE; break;
-    case OP_CLOSE: case OP_RETURN: tm = TM_CLOSE; break;
+    case OP_LT: tm = TM_LT; break;
+    case OP_LE: tm = TM_LE; break;
     default:
       return NULL;  /* cannot find a reasonable name */
   }
-  *name = getstr(G(L)->tmname[tm]) + 2;
+  *name = getstr(G(L)->tmname[tm]);
   return "metamethod";
 }
 
@@ -641,18 +540,13 @@ static const char *funcnamefromcode (lua_State *L, CallInfo *ci,
 
 
 /*
-** Check whether pointer 'o' points to some value in the stack
-** frame of the current function. Because 'o' may not point to a
-** value in this stack, we cannot compare it with the region
-** boundaries (undefined behaviour in ISO C).
+** The subtraction of two potentially unrelated pointers is
+** not ISO C, but it should not crash a program; the subsequent
+** checks are ISO C and ensure a correct result.
 */
 static int isinstack (CallInfo *ci, const TValue *o) {
-  StkId pos;
-  for (pos = ci->func + 1; pos < ci->top; pos++) {
-    if (o == s2v(pos))
-      return 1;
-  }
-  return 0;  /* not found */
+  ptrdiff_t i = o - ci->u.l.base;
+  return (0 <= i && i < (ci->top - ci->u.l.base) && ci->u.l.base + i == o);
 }
 
 
@@ -683,7 +577,7 @@ static const char *varinfo (lua_State *L, const TValue *o) {
     kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
     if (!kind && isinstack(ci, o))  /* no? try a register */
       kind = getobjname(ci_func(ci)->p, currentpc(ci),
-                        cast_int(cast(StkId, o) - (ci->func + 1)), &name);
+                        cast_int(o - ci->u.l.base), &name);
   }
   return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
 }
@@ -695,25 +589,6 @@ l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
 }
 
 
-l_noret luaG_callerror (lua_State *L, const TValue *o) {
-  CallInfo *ci = L->ci;
-  const char *name = NULL;  /* to avoid warnings */
-  const char *what = (isLua(ci)) ? funcnamefromcode(L, ci, &name) : NULL;
-  if (what != NULL) {
-    const char *t = luaT_objtypename(L, o);
-    luaG_runerror(L, "%s '%s' is not callable (a %s value)", what, name, t);
-  }
-  else
-    luaG_typeerror(L, o, "call");
-}
-
-
-l_noret luaG_forerror (lua_State *L, const TValue *o, const char *what) {
-  luaG_runerror(L, "bad 'for' %s (number expected, got %s)",
-                   what, luaT_objtypename(L, o));
-}
-
-
 l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
   if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
   luaG_typeerror(L, p1, "concatenate");
@@ -722,7 +597,8 @@ l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
 
 l_noret luaG_opinterror (lua_State *L, const TValue *p1,
                          const TValue *p2, const char *msg) {
-  if (!ttisnumber(p1))  /* first operand is wrong? */
+  lua_Number temp;
+  if (!tonumber(p1, &temp))  /* first operand is wrong? */
     p2 = p1;  /* now second is wrong */
   luaG_typeerror(L, p2, msg);
 }
@@ -733,7 +609,7 @@ l_noret luaG_opinterror (lua_State *L, const TValue *p1,
 */
 l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
   lua_Integer temp;
-  if (!luaV_tointegerns(p1, &temp, LUA_FLOORN2I))
+  if (!tointeger(p1, &temp))
     p2 = p1;
   luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
 }
@@ -754,7 +630,7 @@ const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
                                         int line) {
   char buff[LUA_IDSIZE];
   if (src)
-    luaO_chunkid(buff, getstr(src), tsslen(src));
+    luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
   else {  /* no source available; use "?" instead */
     buff[0] = '?'; buff[1] = '\0';
   }
@@ -765,7 +641,6 @@ const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
 l_noret luaG_errormsg (lua_State *L) {
   if (L->errfunc != 0) {  /* is there an error handling function? */
     StkId errfunc = restorestack(L, L->errfunc);
-    lua_assert(ttisfunction(s2v(errfunc)));
     setobjs2s(L, L->top, L->top - 1);  /* move argument */
     setobjs2s(L, L->top - 1, errfunc);  /* push function */
     L->top++;  /* assume EXTRA_STACK */
@@ -784,94 +659,42 @@ l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
   msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
   va_end(argp);
   if (isLua(ci))  /* if Lua function, add source:line information */
-    luaG_addinfo(L, msg, ci_func(ci)->p->source, getcurrentline(ci));
+    luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
   luaG_errormsg(L);
 }
 
 
-/*
-** Check whether new instruction 'newpc' is in a different line from
-** previous instruction 'oldpc'. More often than not, 'newpc' is only
-** one or a few instructions after 'oldpc' (it must be after, see
-** caller), so try to avoid calling 'luaG_getfuncline'. If they are
-** too far apart, there is a good chance of a ABSLINEINFO in the way,
-** so it goes directly to 'luaG_getfuncline'.
-*/
-static int changedline (const Proto *p, int oldpc, int newpc) {
-  if (p->lineinfo == NULL)  /* no debug information? */
-    return 0;
-  if (newpc - oldpc < MAXIWTHABS / 2) {  /* not too far apart? */
-    int delta = 0;  /* line diference */
-    int pc = oldpc;
-    for (;;) {
-      int lineinfo = p->lineinfo[++pc];
-      if (lineinfo == ABSLINEINFO)
-        break;  /* cannot compute delta; fall through */
-      delta += lineinfo;
-      if (pc == newpc)
-        return (delta != 0);  /* delta computed successfully */
-    }
-  }
-  /* either instructions are too far apart or there is an absolute line
-     info in the way; compute line difference explicitly */
-  return (luaG_getfuncline(p, oldpc) != luaG_getfuncline(p, newpc));
-}
-
-
-/*
-** Traces the execution of a Lua function. Called before the execution
-** of each opcode, when debug is on. 'L->oldpc' stores the last
-** instruction traced, to detect line changes. When entering a new
-** function, 'npci' will be zero and will test as a new line whatever
-** the value of 'oldpc'.  Some exceptional conditions may return to
-** a function without setting 'oldpc'. In that case, 'oldpc' may be
-** invalid; if so, use zero as a valid value. (A wrong but valid 'oldpc'
-** at most causes an extra call to a line hook.)
-** This function is not "Protected" when called, so it should correct
-** 'L->top' before calling anything that can run the GC.
-*/
-int luaG_traceexec (lua_State *L, const Instruction *pc) {
+void luaG_traceexec (lua_State *L) {
   CallInfo *ci = L->ci;
   lu_byte mask = L->hookmask;
-  const Proto *p = ci_func(ci)->p;
-  int counthook;
-  if (!(mask & (LUA_MASKLINE | LUA_MASKCOUNT))) {  /* no hooks? */
-    ci->u.l.trap = 0;  /* don't need to stop again */
-    return 0;  /* turn off 'trap' */
-  }
-  pc++;  /* reference is always next instruction */
-  ci->u.l.savedpc = pc;  /* save 'pc' */
-  counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
+  int counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
   if (counthook)
     resethookcount(L);  /* reset count */
   else if (!(mask & LUA_MASKLINE))
-    return 1;  /* no line hook and count != 0; nothing to be done now */
+    return;  /* no line hook and count != 0; nothing to be done */
   if (ci->callstatus & CIST_HOOKYIELD) {  /* called hook last time? */
     ci->callstatus &= ~CIST_HOOKYIELD;  /* erase mark */
-    return 1;  /* do not call hook again (VM yielded, so it did not move) */
+    return;  /* do not call hook again (VM yielded, so it did not move) */
   }
-  if (!isIT(*(ci->u.l.savedpc - 1)))  /* top not being used? */
-    L->top = ci->top;  /* correct top */
   if (counthook)
-    luaD_hook(L, LUA_HOOKCOUNT, -1, 0, 0);  /* call count hook */
+    luaD_hook(L, LUA_HOOKCOUNT, -1);  /* call count hook */
   if (mask & LUA_MASKLINE) {
-    /* 'L->oldpc' may be invalid; use zero in this case */
-    int oldpc = (L->oldpc < p->sizecode) ? L->oldpc : 0;
-    int npci = pcRel(pc, p);
-    if (npci <= oldpc ||  /* call hook when jump back (loop), */
-        changedline(p, oldpc, npci)) {  /* or when enter new line */
-      int newline = luaG_getfuncline(p, npci);
-      luaD_hook(L, LUA_HOOKLINE, newline, 0, 0);  /* call line hook */
-    }
-    L->oldpc = npci;  /* 'pc' of last call to line hook */
+    Proto *p = ci_func(ci)->p;
+    int npc = pcRel(ci->u.l.savedpc, p);
+    int newline = getfuncline(p, npc);
+    if (npc == 0 ||  /* call linehook when enter a new function, */
+        ci->u.l.savedpc <= L->oldpc ||  /* when jump back (loop), or when */
+        newline != getfuncline(p, pcRel(L->oldpc, p)))  /* enter a new line */
+      luaD_hook(L, LUA_HOOKLINE, newline);  /* call line hook */
   }
+  L->oldpc = ci->u.l.savedpc;
   if (L->status == LUA_YIELD) {  /* did hook yield? */
     if (counthook)
       L->hookcount = 1;  /* undo decrement to zero */
     ci->u.l.savedpc--;  /* undo increment (resume will increment it again) */
     ci->callstatus |= CIST_HOOKYIELD;  /* mark that it yielded */
+    ci->func = L->top - 1;  /* protect stack below results */
     luaD_throw(L, LUA_YIELD);
   }
-  return 1;  /* keep 'trap' on */
 }
 

ldebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.h $
+** $Id: ldebug.h,v 2.14.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Auxiliary functions from Debug Interface module
 ** See Copyright Notice in lua.h
 */
@@ -11,39 +11,15 @@
 #include "lstate.h"
 
 
-#define pcRel(pc, p)	(cast_int((pc) - (p)->code) - 1)
-
-
-/* Active Lua function (given call info) */
-#define ci_func(ci)		(clLvalue(s2v((ci)->func)))
+#define pcRel(pc, p)	(cast(int, (pc) - (p)->code) - 1)
 
+#define getfuncline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : -1)
 
 #define resethookcount(L)	(L->hookcount = L->basehookcount)
 
-/*
-** mark for entries in 'lineinfo' array that has absolute information in
-** 'abslineinfo' array
-*/
-#define ABSLINEINFO	(-0x80)
 
-
-/*
-** MAXimum number of successive Instructions WiTHout ABSolute line
-** information. (A power of two allows fast divisions.)
-*/
-#if !defined(MAXIWTHABS)
-#define MAXIWTHABS	128
-#endif
-
-
-LUAI_FUNC int luaG_getfuncline (const Proto *f, int pc);
-LUAI_FUNC const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n,
-                                                    StkId *pos);
 LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
                                                 const char *opname);
-LUAI_FUNC l_noret luaG_callerror (lua_State *L, const TValue *o);
-LUAI_FUNC l_noret luaG_forerror (lua_State *L, const TValue *o,
-                                               const char *what);
 LUAI_FUNC l_noret luaG_concaterror (lua_State *L, const TValue *p1,
                                                   const TValue *p2);
 LUAI_FUNC l_noret luaG_opinterror (lua_State *L, const TValue *p1,
@@ -57,7 +33,7 @@ LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...);
 LUAI_FUNC const char *luaG_addinfo (lua_State *L, const char *msg,
                                                   TString *src, int line);
 LUAI_FUNC l_noret luaG_errormsg (lua_State *L);
-LUAI_FUNC int luaG_traceexec (lua_State *L, const Instruction *pc);
+LUAI_FUNC void luaG_traceexec (lua_State *L);
 
 
 #endif

ldo.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.h $
+** $Id: ldo.h,v 2.29.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -17,15 +17,12 @@
 ** Macro to check stack size and grow stack if needed.  Parameters
 ** 'pre'/'pos' allow the macro to preserve a pointer into the
 ** stack across reallocations, doing the work only when needed.
-** It also allows the running of one GC step when the stack is
-** reallocated.
 ** 'condmovestack' is used in heavy tests to force a stack reallocation
 ** at every check.
 */
 #define luaD_checkstackaux(L,n,pre,pos)  \
-	if (l_unlikely(L->stack_last - L->top <= (n))) \
-	  { pre; luaD_growstack(L, n, 1); pos; } \
-        else { condmovestack(L,pre,pos); }
+	if (L->stack_last - L->top <= (n)) \
+	  { pre; luaD_growstack(L, n); pos; } else { condmovestack(L,pre,pos); }
 
 /* In general, 'pre'/'pos' are empty (nothing to save) */
 #define luaD_checkstack(L,n)	luaD_checkstackaux(L,n,(void)0,(void)0)
@@ -33,42 +30,24 @@
 
 
 #define savestack(L,p)		((char *)(p) - (char *)L->stack)
-#define restorestack(L,n)	((StkId)((char *)L->stack + (n)))
-
-
-/* macro to check stack size, preserving 'p' */
-#define checkstackGCp(L,n,p)  \
-  luaD_checkstackaux(L, n, \
-    ptrdiff_t t__ = savestack(L, p);  /* save 'p' */ \
-    luaC_checkGC(L),  /* stack grow uses memory */ \
-    p = restorestack(L, t__))  /* 'pos' part: restore 'p' */
-
-
-/* macro to check stack size and GC */
-#define checkstackGC(L,fsize)  \
-	luaD_checkstackaux(L, (fsize), luaC_checkGC(L), (void)0)
+#define restorestack(L,n)	((TValue *)((char *)L->stack + (n)))
 
 
 /* type of protected functions, to be ran by 'runprotected' */
 typedef void (*Pfunc) (lua_State *L, void *ud);
 
-LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
 LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
                                                   const char *mode);
-LUAI_FUNC void luaD_hook (lua_State *L, int event, int line,
-                                        int fTransfer, int nTransfer);
-LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci);
-LUAI_FUNC void luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func, int n);
-LUAI_FUNC CallInfo *luaD_precall (lua_State *L, StkId func, int nResults);
+LUAI_FUNC void luaD_hook (lua_State *L, int event, int line);
+LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
 LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
 LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults);
-LUAI_FUNC void luaD_tryfuncTM (lua_State *L, StkId func);
-LUAI_FUNC int luaD_closeprotected (lua_State *L, ptrdiff_t level, int status);
 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
                                         ptrdiff_t oldtop, ptrdiff_t ef);
-LUAI_FUNC void luaD_poscall (lua_State *L, CallInfo *ci, int nres);
-LUAI_FUNC int luaD_reallocstack (lua_State *L, int newsize, int raiseerror);
-LUAI_FUNC int luaD_growstack (lua_State *L, int n, int raiseerror);
+LUAI_FUNC int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult,
+                                          int nres);
+LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
+LUAI_FUNC void luaD_growstack (lua_State *L, int n);
 LUAI_FUNC void luaD_shrinkstack (lua_State *L);
 LUAI_FUNC void luaD_inctop (lua_State *L);
 

ldump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldump.c $
+** $Id: ldump.c,v 2.37.1.1 2017/04/19 17:20:42 roberto Exp $
 ** save precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -29,15 +29,15 @@ typedef struct {
 
 
 /*
-** All high-level dumps go through dumpVector; you can change it to
+** All high-level dumps go through DumpVector; you can change it to
 ** change the endianness of the result
 */
-#define dumpVector(D,v,n)	dumpBlock(D,v,(n)*sizeof((v)[0]))
+#define DumpVector(v,n,D)	DumpBlock(v,(n)*sizeof((v)[0]),D)
 
-#define dumpLiteral(D, s)	dumpBlock(D,s,sizeof(s) - sizeof(char))
+#define DumpLiteral(s,D)	DumpBlock(s, sizeof(s) - sizeof(char), D)
 
 
-static void dumpBlock (DumpState *D, const void *b, size_t size) {
+static void DumpBlock (const void *b, size_t size, DumpState *D) {
   if (D->status == 0 && size > 0) {
     lua_unlock(D->L);
     D->status = (*D->writer)(D->L, b, size, D->data);
@@ -46,164 +46,153 @@ static void dumpBlock (DumpState *D, const void *b, size_t size) {
 }
 
 
-#define dumpVar(D,x)		dumpVector(D,&x,1)
+#define DumpVar(x,D)		DumpVector(&x,1,D)
 
 
-static void dumpByte (DumpState *D, int y) {
+static void DumpByte (int y, DumpState *D) {
   lu_byte x = (lu_byte)y;
-  dumpVar(D, x);
+  DumpVar(x, D);
 }
 
 
-/* dumpInt Buff Size */
-#define DIBS    ((sizeof(size_t) * 8 / 7) + 1)
-
-static void dumpSize (DumpState *D, size_t x) {
-  lu_byte buff[DIBS];
-  int n = 0;
-  do {
-    buff[DIBS - (++n)] = x & 0x7f;  /* fill buffer in reverse order */
-    x >>= 7;
-  } while (x != 0);
-  buff[DIBS - 1] |= 0x80;  /* mark last byte */
-  dumpVector(D, buff + DIBS - n, n);
+static void DumpInt (int x, DumpState *D) {
+  DumpVar(x, D);
 }
 
 
-static void dumpInt (DumpState *D, int x) {
-  dumpSize(D, x);
+static void DumpNumber (lua_Number x, DumpState *D) {
+  DumpVar(x, D);
 }
 
 
-static void dumpNumber (DumpState *D, lua_Number x) {
-  dumpVar(D, x);
+static void DumpInteger (lua_Integer x, DumpState *D) {
+  DumpVar(x, D);
 }
 
 
-static void dumpInteger (DumpState *D, lua_Integer x) {
-  dumpVar(D, x);
-}
-
-
-static void dumpString (DumpState *D, const TString *s) {
+static void DumpString (const TString *s, DumpState *D) {
   if (s == NULL)
-    dumpSize(D, 0);
+    DumpByte(0, D);
   else {
-    size_t size = tsslen(s);
+    size_t size = tsslen(s) + 1;  /* include trailing '\0' */
     const char *str = getstr(s);
-    dumpSize(D, size + 1);
-    dumpVector(D, str, size);
+    if (size < 0xFF)
+      DumpByte(cast_int(size), D);
+    else {
+      DumpByte(0xFF, D);
+      DumpVar(size, D);
+    }
+    DumpVector(str, size - 1, D);  /* no need to save '\0' */
   }
 }
 
 
-static void dumpCode (DumpState *D, const Proto *f) {
-  dumpInt(D, f->sizecode);
-  dumpVector(D, f->code, f->sizecode);
+static void DumpCode (const Proto *f, DumpState *D) {
+  DumpInt(f->sizecode, D);
+  DumpVector(f->code, f->sizecode, D);
 }
 
 
-static void dumpFunction(DumpState *D, const Proto *f, TString *psource);
+static void DumpFunction(const Proto *f, TString *psource, DumpState *D);
 
-static void dumpConstants (DumpState *D, const Proto *f) {
+static void DumpConstants (const Proto *f, DumpState *D) {
   int i;
   int n = f->sizek;
-  dumpInt(D, n);
+  DumpInt(n, D);
   for (i = 0; i < n; i++) {
     const TValue *o = &f->k[i];
-    int tt = ttypetag(o);
-    dumpByte(D, tt);
-    switch (tt) {
-      case LUA_VNUMFLT:
-        dumpNumber(D, fltvalue(o));
-        break;
-      case LUA_VNUMINT:
-        dumpInteger(D, ivalue(o));
-        break;
-      case LUA_VSHRSTR:
-      case LUA_VLNGSTR:
-        dumpString(D, tsvalue(o));
-        break;
-      default:
-        lua_assert(tt == LUA_VNIL || tt == LUA_VFALSE || tt == LUA_VTRUE);
+    DumpByte(ttype(o), D);
+    switch (ttype(o)) {
+    case LUA_TNIL:
+      break;
+    case LUA_TBOOLEAN:
+      DumpByte(bvalue(o), D);
+      break;
+    case LUA_TNUMFLT:
+      DumpNumber(fltvalue(o), D);
+      break;
+    case LUA_TNUMINT:
+      DumpInteger(ivalue(o), D);
+      break;
+    case LUA_TSHRSTR:
+    case LUA_TLNGSTR:
+      DumpString(tsvalue(o), D);
+      break;
+    default:
+      lua_assert(0);
     }
   }
 }
 
 
-static void dumpProtos (DumpState *D, const Proto *f) {
+static void DumpProtos (const Proto *f, DumpState *D) {
   int i;
   int n = f->sizep;
-  dumpInt(D, n);
+  DumpInt(n, D);
   for (i = 0; i < n; i++)
-    dumpFunction(D, f->p[i], f->source);
+    DumpFunction(f->p[i], f->source, D);
 }
 
 
-static void dumpUpvalues (DumpState *D, const Proto *f) {
+static void DumpUpvalues (const Proto *f, DumpState *D) {
   int i, n = f->sizeupvalues;
-  dumpInt(D, n);
+  DumpInt(n, D);
   for (i = 0; i < n; i++) {
-    dumpByte(D, f->upvalues[i].instack);
-    dumpByte(D, f->upvalues[i].idx);
-    dumpByte(D, f->upvalues[i].kind);
+    DumpByte(f->upvalues[i].instack, D);
+    DumpByte(f->upvalues[i].idx, D);
   }
 }
 
 
-static void dumpDebug (DumpState *D, const Proto *f) {
+static void DumpDebug (const Proto *f, DumpState *D) {
   int i, n;
   n = (D->strip) ? 0 : f->sizelineinfo;
-  dumpInt(D, n);
-  dumpVector(D, f->lineinfo, n);
-  n = (D->strip) ? 0 : f->sizeabslineinfo;
-  dumpInt(D, n);
-  for (i = 0; i < n; i++) {
-    dumpInt(D, f->abslineinfo[i].pc);
-    dumpInt(D, f->abslineinfo[i].line);
-  }
+  DumpInt(n, D);
+  DumpVector(f->lineinfo, n, D);
   n = (D->strip) ? 0 : f->sizelocvars;
-  dumpInt(D, n);
+  DumpInt(n, D);
   for (i = 0; i < n; i++) {
-    dumpString(D, f->locvars[i].varname);
-    dumpInt(D, f->locvars[i].startpc);
-    dumpInt(D, f->locvars[i].endpc);
+    DumpString(f->locvars[i].varname, D);
+    DumpInt(f->locvars[i].startpc, D);
+    DumpInt(f->locvars[i].endpc, D);
   }
   n = (D->strip) ? 0 : f->sizeupvalues;
-  dumpInt(D, n);
+  DumpInt(n, D);
   for (i = 0; i < n; i++)
-    dumpString(D, f->upvalues[i].name);
+    DumpString(f->upvalues[i].name, D);
 }
 
 
-static void dumpFunction (DumpState *D, const Proto *f, TString *psource) {
+static void DumpFunction (const Proto *f, TString *psource, DumpState *D) {
   if (D->strip || f->source == psource)
-    dumpString(D, NULL);  /* no debug info or same source as its parent */
+    DumpString(NULL, D);  /* no debug info or same source as its parent */
   else
-    dumpString(D, f->source);
-  dumpInt(D, f->linedefined);
-  dumpInt(D, f->lastlinedefined);
-  dumpByte(D, f->numparams);
-  dumpByte(D, f->is_vararg);
-  dumpByte(D, f->maxstacksize);
-  dumpCode(D, f);
-  dumpConstants(D, f);
-  dumpUpvalues(D, f);
-  dumpProtos(D, f);
-  dumpDebug(D, f);
+    DumpString(f->source, D);
+  DumpInt(f->linedefined, D);
+  DumpInt(f->lastlinedefined, D);
+  DumpByte(f->numparams, D);
+  DumpByte(f->is_vararg, D);
+  DumpByte(f->maxstacksize, D);
+  DumpCode(f, D);
+  DumpConstants(f, D);
+  DumpUpvalues(f, D);
+  DumpProtos(f, D);
+  DumpDebug(f, D);
 }
 
 
-static void dumpHeader (DumpState *D) {
-  dumpLiteral(D, LUA_SIGNATURE);
-  dumpByte(D, LUAC_VERSION);
-  dumpByte(D, LUAC_FORMAT);
-  dumpLiteral(D, LUAC_DATA);
-  dumpByte(D, sizeof(Instruction));
-  dumpByte(D, sizeof(lua_Integer));
-  dumpByte(D, sizeof(lua_Number));
-  dumpInteger(D, LUAC_INT);
-  dumpNumber(D, LUAC_NUM);
+static void DumpHeader (DumpState *D) {
+  DumpLiteral(LUA_SIGNATURE, D);
+  DumpByte(LUAC_VERSION, D);
+  DumpByte(LUAC_FORMAT, D);
+  DumpLiteral(LUAC_DATA, D);
+  DumpByte(sizeof(int), D);
+  DumpByte(sizeof(size_t), D);
+  DumpByte(sizeof(Instruction), D);
+  DumpByte(sizeof(lua_Integer), D);
+  DumpByte(sizeof(lua_Number), D);
+  DumpInteger(LUAC_INT, D);
+  DumpNumber(LUAC_NUM, D);
 }
 
 
@@ -218,9 +207,9 @@ int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
   D.data = data;
   D.strip = strip;
   D.status = 0;
-  dumpHeader(&D);
-  dumpByte(&D, f->sizeupvalues);
-  dumpFunction(&D, f, NULL);
+  DumpHeader(&D);
+  DumpByte(f->sizeupvalues, &D);
+  DumpFunction(f, NULL, &D);
   return D.status;
 }
 

lfunc.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.c $
+** $Id: lfunc.c,v 2.45.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -14,8 +14,6 @@
 
 #include "lua.h"
 
-#include "ldebug.h"
-#include "ldo.h"
 #include "lfunc.h"
 #include "lgc.h"
 #include "lmem.h"
@@ -24,55 +22,56 @@
 
 
 
-CClosure *luaF_newCclosure (lua_State *L, int nupvals) {
-  GCObject *o = luaC_newobj(L, LUA_VCCL, sizeCclosure(nupvals));
+CClosure *luaF_newCclosure (lua_State *L, int n) {
+  GCObject *o = luaC_newobj(L, LUA_TCCL, sizeCclosure(n));
   CClosure *c = gco2ccl(o);
-  c->nupvalues = cast_byte(nupvals);
+  c->nupvalues = cast_byte(n);
   return c;
 }
 
 
-LClosure *luaF_newLclosure (lua_State *L, int nupvals) {
-  GCObject *o = luaC_newobj(L, LUA_VLCL, sizeLclosure(nupvals));
+LClosure *luaF_newLclosure (lua_State *L, int n) {
+  GCObject *o = luaC_newobj(L, LUA_TLCL, sizeLclosure(n));
   LClosure *c = gco2lcl(o);
   c->p = NULL;
-  c->nupvalues = cast_byte(nupvals);
-  while (nupvals--) c->upvals[nupvals] = NULL;
+  c->nupvalues = cast_byte(n);
+  while (n--) c->upvals[n] = NULL;
   return c;
 }
 
-
 /*
 ** fill a closure with new closed upvalues
 */
 void luaF_initupvals (lua_State *L, LClosure *cl) {
   int i;
   for (i = 0; i < cl->nupvalues; i++) {
-    GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
-    UpVal *uv = gco2upv(o);
+    UpVal *uv = luaM_new(L, UpVal);
+    uv->refcount = 1;
     uv->v = &uv->u.value;  /* make it closed */
     setnilvalue(uv->v);
     cl->upvals[i] = uv;
-    luaC_objbarrier(L, cl, uv);
   }
 }
 
 
-/*
-** Create a new upvalue at the given level, and link it to the list of
-** open upvalues of 'L' after entry 'prev'.
-**/
-static UpVal *newupval (lua_State *L, int tbc, StkId level, UpVal **prev) {
-  GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
-  UpVal *uv = gco2upv(o);
-  UpVal *next = *prev;
-  uv->v = s2v(level);  /* current value lives in the stack */
-  uv->tbc = tbc;
-  uv->u.open.next = next;  /* link it to list of open upvalues */
-  uv->u.open.previous = prev;
-  if (next)
-    next->u.open.previous = &uv->u.open.next;
-  *prev = uv;
+UpVal *luaF_findupval (lua_State *L, StkId level) {
+  UpVal **pp = &L->openupval;
+  UpVal *p;
+  UpVal *uv;
+  lua_assert(isintwups(L) || L->openupval == NULL);
+  while (*pp != NULL && (p = *pp)->v >= level) {
+    lua_assert(upisopen(p));
+    if (p->v == level)  /* found a corresponding upvalue? */
+      return p;  /* return it */
+    pp = &p->u.open.next;
+  }
+  /* not found: create a new upvalue */
+  uv = luaM_new(L, UpVal);
+  uv->refcount = 0;
+  uv->u.open.next = *pp;  /* link it to list of open upvalues */
+  uv->u.open.touched = 1;
+  *pp = uv;
+  uv->v = level;  /* current value lives in the stack */
   if (!isintwups(L)) {  /* thread not in list of threads with upvalues? */
     L->twups = G(L)->twups;  /* link it to the list */
     G(L)->twups = L;
@@ -81,175 +80,34 @@ static UpVal *newupval (lua_State *L, int tbc, StkId level, UpVal **prev) {
 }
 
 
-/*
-** Find and reuse, or create if it does not exist, an upvalue
-** at the given level.
-*/
-UpVal *luaF_findupval (lua_State *L, StkId level) {
-  UpVal **pp = &L->openupval;
-  UpVal *p;
-  lua_assert(isintwups(L) || L->openupval == NULL);
-  while ((p = *pp) != NULL && uplevel(p) >= level) {  /* search for it */
-    lua_assert(!isdead(G(L), p));
-    if (uplevel(p) == level)  /* corresponding upvalue? */
-      return p;  /* return it */
-    pp = &p->u.open.next;
-  }
-  /* not found: create a new upvalue after 'pp' */
-  return newupval(L, 0, level, pp);
-}
-
-
-/*
-** Call closing method for object 'obj' with error message 'err'. The
-** boolean 'yy' controls whether the call is yieldable.
-** (This function assumes EXTRA_STACK.)
-*/
-static void callclosemethod (lua_State *L, TValue *obj, TValue *err, int yy) {
-  StkId top = L->top;
-  const TValue *tm = luaT_gettmbyobj(L, obj, TM_CLOSE);
-  setobj2s(L, top, tm);  /* will call metamethod... */
-  setobj2s(L, top + 1, obj);  /* with 'self' as the 1st argument */
-  setobj2s(L, top + 2, err);  /* and error msg. as 2nd argument */
-  L->top = top + 3;  /* add function and arguments */
-  if (yy)
-    luaD_call(L, top, 0);
-  else
-    luaD_callnoyield(L, top, 0);
-}
-
-
-/*
-** Check whether object at given level has a close metamethod and raise
-** an error if not.
-*/
-static void checkclosemth (lua_State *L, StkId level) {
-  const TValue *tm = luaT_gettmbyobj(L, s2v(level), TM_CLOSE);
-  if (ttisnil(tm)) {  /* no metamethod? */
-    int idx = cast_int(level - L->ci->func);  /* variable index */
-    const char *vname = luaG_findlocal(L, L->ci, idx, NULL);
-    if (vname == NULL) vname = "?";
-    luaG_runerror(L, "variable '%s' got a non-closable value", vname);
-  }
-}
-
-
-/*
-** Prepare and call a closing method.
-** If status is CLOSEKTOP, the call to the closing method will be pushed
-** at the top of the stack. Otherwise, values can be pushed right after
-** the 'level' of the upvalue being closed, as everything after that
-** won't be used again.
-*/
-static void prepcallclosemth (lua_State *L, StkId level, int status, int yy) {
-  TValue *uv = s2v(level);  /* value being closed */
-  TValue *errobj;
-  if (status == CLOSEKTOP)
-    errobj = &G(L)->nilvalue;  /* error object is nil */
-  else {  /* 'luaD_seterrorobj' will set top to level + 2 */
-    errobj = s2v(level + 1);  /* error object goes after 'uv' */
-    luaD_seterrorobj(L, status, level + 1);  /* set error object */
-  }
-  callclosemethod(L, uv, errobj, yy);
-}
-
-
-/*
-** Maximum value for deltas in 'tbclist', dependent on the type
-** of delta. (This macro assumes that an 'L' is in scope where it
-** is used.)
-*/
-#define MAXDELTA  \
-	((256ul << ((sizeof(L->stack->tbclist.delta) - 1) * 8)) - 1)
-
-
-/*
-** Insert a variable in the list of to-be-closed variables.
-*/
-void luaF_newtbcupval (lua_State *L, StkId level) {
-  lua_assert(level > L->tbclist);
-  if (l_isfalse(s2v(level)))
-    return;  /* false doesn't need to be closed */
-  checkclosemth(L, level);  /* value must have a close method */
-  while (cast_uint(level - L->tbclist) > MAXDELTA) {
-    L->tbclist += MAXDELTA;  /* create a dummy node at maximum delta */
-    L->tbclist->tbclist.delta = 0;
-  }
-  level->tbclist.delta = cast(unsigned short, level - L->tbclist);
-  L->tbclist = level;
-}
-
-
-void luaF_unlinkupval (UpVal *uv) {
-  lua_assert(upisopen(uv));
-  *uv->u.open.previous = uv->u.open.next;
-  if (uv->u.open.next)
-    uv->u.open.next->u.open.previous = uv->u.open.previous;
-}
-
-
-/*
-** Close all upvalues up to the given stack level.
-*/
-void luaF_closeupval (lua_State *L, StkId level) {
+void luaF_close (lua_State *L, StkId level) {
   UpVal *uv;
-  StkId upl;  /* stack index pointed by 'uv' */
-  while ((uv = L->openupval) != NULL && (upl = uplevel(uv)) >= level) {
-    TValue *slot = &uv->u.value;  /* new position for value */
-    lua_assert(uplevel(uv) < L->top);
-    luaF_unlinkupval(uv);  /* remove upvalue from 'openupval' list */
-    setobj(L, slot, uv->v);  /* move value to upvalue slot */
-    uv->v = slot;  /* now current value lives here */
-    if (!iswhite(uv)) {  /* neither white nor dead? */
-      nw2black(uv);  /* closed upvalues cannot be gray */
-      luaC_barrier(L, uv, slot);
+  while (L->openupval != NULL && (uv = L->openupval)->v >= level) {
+    lua_assert(upisopen(uv));
+    L->openupval = uv->u.open.next;  /* remove from 'open' list */
+    if (uv->refcount == 0)  /* no references? */
+      luaM_free(L, uv);  /* free upvalue */
+    else {
+      setobj(L, &uv->u.value, uv->v);  /* move value to upvalue slot */
+      uv->v = &uv->u.value;  /* now current value lives here */
+      luaC_upvalbarrier(L, uv);
     }
   }
 }
 
 
-/*
-** Remove firt element from the tbclist plus its dummy nodes.
-*/
-static void poptbclist (lua_State *L) {
-  StkId tbc = L->tbclist;
-  lua_assert(tbc->tbclist.delta > 0);  /* first element cannot be dummy */
-  tbc -= tbc->tbclist.delta;
-  while (tbc > L->stack && tbc->tbclist.delta == 0)
-    tbc -= MAXDELTA;  /* remove dummy nodes */
-  L->tbclist = tbc;
-}
-
-
-/*
-** Close all upvalues and to-be-closed variables up to the given stack
-** level.
-*/
-void luaF_close (lua_State *L, StkId level, int status, int yy) {
-  ptrdiff_t levelrel = savestack(L, level);
-  luaF_closeupval(L, level);  /* first, close the upvalues */
-  while (L->tbclist >= level) {  /* traverse tbc's down to that level */
-    StkId tbc = L->tbclist;  /* get variable index */
-    poptbclist(L);  /* remove it from list */
-    prepcallclosemth(L, tbc, status, yy);  /* close variable */
-    level = restorestack(L, levelrel);
-  }
-}
-
-
 Proto *luaF_newproto (lua_State *L) {
-  GCObject *o = luaC_newobj(L, LUA_VPROTO, sizeof(Proto));
+  GCObject *o = luaC_newobj(L, LUA_TPROTO, sizeof(Proto));
   Proto *f = gco2p(o);
   f->k = NULL;
   f->sizek = 0;
   f->p = NULL;
   f->sizep = 0;
   f->code = NULL;
+  f->cache = NULL;
   f->sizecode = 0;
   f->lineinfo = NULL;
   f->sizelineinfo = 0;
-  f->abslineinfo = NULL;
-  f->sizeabslineinfo = 0;
   f->upvalues = NULL;
   f->sizeupvalues = 0;
   f->numparams = 0;
@@ -269,7 +127,6 @@ void luaF_freeproto (lua_State *L, Proto *f) {
   luaM_freearray(L, f->p, f->sizep);
   luaM_freearray(L, f->k, f->sizek);
   luaM_freearray(L, f->lineinfo, f->sizelineinfo);
-  luaM_freearray(L, f->abslineinfo, f->sizeabslineinfo);
   luaM_freearray(L, f->locvars, f->sizelocvars);
   luaM_freearray(L, f->upvalues, f->sizeupvalues);
   luaM_free(L, f);

lfunc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.h $
+** $Id: lfunc.h,v 2.15.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -11,11 +11,11 @@
 #include "lobject.h"
 
 
-#define sizeCclosure(n)	(cast_int(offsetof(CClosure, upvalue)) + \
-                         cast_int(sizeof(TValue)) * (n))
+#define sizeCclosure(n)	(cast(int, sizeof(CClosure)) + \
+                         cast(int, sizeof(TValue)*((n)-1)))
 
-#define sizeLclosure(n)	(cast_int(offsetof(LClosure, upvals)) + \
-                         cast_int(sizeof(TValue *)) * (n))
+#define sizeLclosure(n)	(cast(int, sizeof(LClosure)) + \
+                         cast(int, sizeof(TValue *)*((n)-1)))
 
 
 /* test whether thread is in 'twups' list */
@@ -29,33 +29,30 @@
 #define MAXUPVAL	255
 
 
+/*
+** Upvalues for Lua closures
+*/
+struct UpVal {
+  TValue *v;  /* points to stack or to its own value */
+  lu_mem refcount;  /* reference counter */
+  union {
+    struct {  /* (when open) */
+      UpVal *next;  /* linked list */
+      int touched;  /* mark to avoid cycles with dead threads */
+    } open;
+    TValue value;  /* the value (when closed) */
+  } u;
+};
+
 #define upisopen(up)	((up)->v != &(up)->u.value)
 
 
-#define uplevel(up)	check_exp(upisopen(up), cast(StkId, (up)->v))
-
-
-/*
-** maximum number of misses before giving up the cache of closures
-** in prototypes
-*/
-#define MAXMISS		10
-
-
-
-/* special status to close upvalues preserving the top of the stack */
-#define CLOSEKTOP	(-1)
-
-
 LUAI_FUNC Proto *luaF_newproto (lua_State *L);
-LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals);
-LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals);
+LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
+LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
 LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
-LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
-LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
-LUAI_FUNC void luaF_close (lua_State *L, StkId level, int status, int yy);
-LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
+LUAI_FUNC void luaF_close (lua_State *L, StkId level);
 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
                                          int pc);

lgc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.h $
+** $Id: lgc.h,v 2.91.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -12,31 +12,38 @@
 #include "lstate.h"
 
 /*
-** Collectable objects may have one of three colors: white, which means
-** the object is not marked; gray, which means the object is marked, but
-** its references may be not marked; and black, which means that the
-** object and all its references are marked.  The main invariant of the
-** garbage collector, while marking objects, is that a black object can
-** never point to a white one. Moreover, any gray object must be in a
-** "gray list" (gray, grayagain, weak, allweak, ephemeron) so that it
-** can be visited again before finishing the collection cycle. (Open
-** upvalues are an exception to this rule.)  These lists have no meaning
-** when the invariant is not being enforced (e.g., sweep phase).
+** Collectable objects may have one of three colors: white, which
+** means the object is not marked; gray, which means the
+** object is marked, but its references may be not marked; and
+** black, which means that the object and all its references are marked.
+** The main invariant of the garbage collector, while marking objects,
+** is that a black object can never point to a white one. Moreover,
+** any gray object must be in a "gray list" (gray, grayagain, weak,
+** allweak, ephemeron) so that it can be visited again before finishing
+** the collection cycle. These lists have no meaning when the invariant
+** is not being enforced (e.g., sweep phase).
 */
 
 
+
+/* how much to allocate before next GC step */
+#if !defined(GCSTEPSIZE)
+/* ~100 small strings */
+#define GCSTEPSIZE	(cast_int(100 * sizeof(TString)))
+#endif
+
+
 /*
 ** Possible states of the Garbage Collector
 */
 #define GCSpropagate	0
-#define GCSenteratomic	1
-#define GCSatomic	2
-#define GCSswpallgc	3
-#define GCSswpfinobj	4
-#define GCSswptobefnz	5
-#define GCSswpend	6
-#define GCScallfin	7
-#define GCSpause	8
+#define GCSatomic	1
+#define GCSswpallgc	2
+#define GCSswpfinobj	3
+#define GCSswptobefnz	4
+#define GCSswpend	5
+#define GCScallfin	6
+#define GCSpause	7
 
 
 #define issweepphase(g)  \
@@ -57,7 +64,7 @@
 /*
 ** some useful bit tricks
 */
-#define resetbits(x,m)		((x) &= cast_byte(~(m)))
+#define resetbits(x,m)		((x) &= cast(lu_byte, ~(m)))
 #define setbits(x,m)		((x) |= (m))
 #define testbits(x,m)		((x) & (m))
 #define bitmask(b)		(1<<(b))
@@ -67,19 +74,12 @@
 #define testbit(x,b)		testbits(x, bitmask(b))
 
 
-/*
-** Layout for bit use in 'marked' field. First three bits are
-** used for object "age" in generational mode. Last bit is used
-** by tests.
-*/
-#define WHITE0BIT	3  /* object is white (type 0) */
-#define WHITE1BIT	4  /* object is white (type 1) */
-#define BLACKBIT	5  /* object is black */
-#define FINALIZEDBIT	6  /* object has been marked for finalization */
-
-#define TESTBIT		7
-
-
+/* Layout for bit use in 'marked' field: */
+#define WHITE0BIT	0  /* object is white (type 0) */
+#define WHITE1BIT	1  /* object is white (type 1) */
+#define BLACKBIT	2  /* object is black */
+#define FINALIZEDBIT	3  /* object has been marked for finalization */
+/* bit 7 is currently used by tests (luaL_checkmemory) */
 
 #define WHITEBITS	bit2mask(WHITE0BIT, WHITE1BIT)
 
@@ -92,62 +92,15 @@
 #define tofinalize(x)	testbit((x)->marked, FINALIZEDBIT)
 
 #define otherwhite(g)	((g)->currentwhite ^ WHITEBITS)
-#define isdeadm(ow,m)	((m) & (ow))
+#define isdeadm(ow,m)	(!(((m) ^ WHITEBITS) & (ow)))
 #define isdead(g,v)	isdeadm(otherwhite(g), (v)->marked)
 
 #define changewhite(x)	((x)->marked ^= WHITEBITS)
-#define nw2black(x)  \
-	check_exp(!iswhite(x), l_setbit((x)->marked, BLACKBIT))
+#define gray2black(x)	l_setbit((x)->marked, BLACKBIT)
 
-#define luaC_white(g)	cast_byte((g)->currentwhite & WHITEBITS)
+#define luaC_white(g)	cast(lu_byte, (g)->currentwhite & WHITEBITS)
 
 
-/* object age in generational mode */
-#define G_NEW		0	/* created in current cycle */
-#define G_SURVIVAL	1	/* created in previous cycle */
-#define G_OLD0		2	/* marked old by frw. barrier in this cycle */
-#define G_OLD1		3	/* first full cycle as old */
-#define G_OLD		4	/* really old object (not to be visited) */
-#define G_TOUCHED1	5	/* old object touched this cycle */
-#define G_TOUCHED2	6	/* old object touched in previous cycle */
-
-#define AGEBITS		7  /* all age bits (111) */
-
-#define getage(o)	((o)->marked & AGEBITS)
-#define setage(o,a)  ((o)->marked = cast_byte(((o)->marked & (~AGEBITS)) | a))
-#define isold(o)	(getage(o) > G_SURVIVAL)
-
-#define changeage(o,f,t)  \
-	check_exp(getage(o) == (f), (o)->marked ^= ((f)^(t)))
-
-
-/* Default Values for GC parameters */
-#define LUAI_GENMAJORMUL         100
-#define LUAI_GENMINORMUL         20
-
-/* wait memory to double before starting new cycle */
-#define LUAI_GCPAUSE    200
-
-/*
-** some gc parameters are stored divided by 4 to allow a maximum value
-** up to 1023 in a 'lu_byte'.
-*/
-#define getgcparam(p)	((p) * 4)
-#define setgcparam(p,v)	((p) = (v) / 4)
-
-#define LUAI_GCMUL      100
-
-/* how much to allocate before next GC step (log2) */
-#define LUAI_GCSTEPSIZE 13      /* 8 KB */
-
-
-/*
-** Check whether the declared GC mode is generational. While in
-** generational mode, the collector can go temporarily to incremental
-** mode to improve performance. This is signaled by 'g->lastatomic != 0'.
-*/
-#define isdecGCmodegen(g)	(g->gckind == KGC_GEN || g->lastatomic != 0)
-
 /*
 ** Does one step of collection when debt becomes positive. 'pre'/'pos'
 ** allows some adjustments to be done only when needed. macro
@@ -174,6 +127,10 @@
 	(isblack(p) && iswhite(o)) ? \
 	luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))
 
+#define luaC_upvalbarrier(L,uv) ( \
+	(iscollectable((uv)->v) && !upisopen(uv)) ? \
+         luaC_upvalbarrier_(L,uv) : cast_void(0))
+
 LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o);
 LUAI_FUNC void luaC_freeallobjects (lua_State *L);
 LUAI_FUNC void luaC_step (lua_State *L);
@@ -181,9 +138,10 @@ LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
 LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
 LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz);
 LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
-LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
+LUAI_FUNC void luaC_barrierback_ (lua_State *L, Table *o);
+LUAI_FUNC void luaC_upvalbarrier_ (lua_State *L, UpVal *uv);
 LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
-LUAI_FUNC void luaC_changemode (lua_State *L, int newmode);
+LUAI_FUNC void luaC_upvdeccount (lua_State *L, UpVal *uv);
 
 
 #endif

linit.c

@@ -1,5 +1,5 @@
 /*
-** $Id: linit.c $
+** $Id: linit.c,v 1.39.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Initialization of libraries for lua.c and other clients
 ** See Copyright Notice in lua.h
 */
@@ -40,7 +40,7 @@
 ** program
 */
 static const luaL_Reg loadedlibs[] = {
-  {LUA_GNAME, luaopen_base},
+  {"_G", luaopen_base},
   {LUA_LOADLIBNAME, luaopen_package},
   {LUA_COLIBNAME, luaopen_coroutine},
   {LUA_TABLIBNAME, luaopen_table},
@@ -50,6 +50,9 @@ static const luaL_Reg loadedlibs[] = {
   {LUA_MATHLIBNAME, luaopen_math},
   {LUA_UTF8LIBNAME, luaopen_utf8},
   {LUA_DBLIBNAME, luaopen_debug},
+#if defined(LUA_COMPAT_BITLIB)
+  {LUA_BITLIBNAME, luaopen_bit32},
+#endif
   {NULL, NULL}
 };
 

liolib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c $
+** $Id: liolib.c,v 2.151.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -39,7 +39,7 @@
 /* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
 static int l_checkmode (const char *mode) {
   return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&
-         (*mode != '+' || ((void)(++mode), 1)) &&  /* skip if char is '+' */
+         (*mode != '+' || (++mode, 1)) &&  /* skip if char is '+' */
          (strspn(mode, L_MODEEXT) == strlen(mode)));  /* check extensions */
 }
 
@@ -64,17 +64,11 @@ static int l_checkmode (const char *mode) {
 #define l_popen(L,c,m)		(_popen(c,m))
 #define l_pclose(L,file)	(_pclose(file))
 
-#if !defined(l_checkmodep)
-/* Windows accepts "[rw][bt]?" as valid modes */
-#define l_checkmodep(m)	((m[0] == 'r' || m[0] == 'w') && \
-  (m[1] == '\0' || ((m[1] == 'b' || m[1] == 't') && m[2] == '\0')))
-#endif
-
 #else				/* }{ */
 
 /* ISO C definitions */
 #define l_popen(L,c,m)  \
-	  ((void)c, (void)m, \
+	  ((void)((void)c, m), \
 	  luaL_error(L, "'popen' not supported"), \
 	  (FILE*)0)
 #define l_pclose(L,file)		((void)L, (void)file, -1)
@@ -83,12 +77,6 @@ static int l_checkmode (const char *mode) {
 
 #endif				/* } */
 
-
-#if !defined(l_checkmodep)
-/* By default, Lua accepts only "r" or "w" as valid modes */
-#define l_checkmodep(m)        ((m[0] == 'r' || m[0] == 'w') && m[1] == '\0')
-#endif
-
 /* }====================================================== */
 
 
@@ -145,7 +133,6 @@ static int l_checkmode (const char *mode) {
 /* }====================================================== */
 
 
-
 #define IO_PREFIX	"_IO_"
 #define IOPREF_LEN	(sizeof(IO_PREFIX)/sizeof(char) - 1)
 #define IO_INPUT	(IO_PREFIX "input")
@@ -165,7 +152,7 @@ static int io_type (lua_State *L) {
   luaL_checkany(L, 1);
   p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
   if (p == NULL)
-    luaL_pushfail(L);  /* not a file */
+    lua_pushnil(L);  /* not a file */
   else if (isclosed(p))
     lua_pushliteral(L, "closed file");
   else
@@ -186,7 +173,7 @@ static int f_tostring (lua_State *L) {
 
 static FILE *tofile (lua_State *L) {
   LStream *p = tolstream(L);
-  if (l_unlikely(isclosed(p)))
+  if (isclosed(p))
     luaL_error(L, "attempt to use a closed file");
   lua_assert(p->f);
   return p->f;
@@ -199,7 +186,7 @@ static FILE *tofile (lua_State *L) {
 ** handle is in a consistent state.
 */
 static LStream *newprefile (lua_State *L) {
-  LStream *p = (LStream *)lua_newuserdatauv(L, sizeof(LStream), 0);
+  LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
   p->closef = NULL;  /* mark file handle as 'closed' */
   luaL_setmetatable(L, LUA_FILEHANDLE);
   return p;
@@ -227,7 +214,7 @@ static int f_close (lua_State *L) {
 
 static int io_close (lua_State *L) {
   if (lua_isnone(L, 1))  /* no argument? */
-    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use default output */
+    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use standard output */
   return f_close(L);
 }
 
@@ -261,7 +248,7 @@ static LStream *newfile (lua_State *L) {
 static void opencheck (lua_State *L, const char *fname, const char *mode) {
   LStream *p = newfile(L);
   p->f = fopen(fname, mode);
-  if (l_unlikely(p->f == NULL))
+  if (p->f == NULL)
     luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
 }
 
@@ -282,7 +269,6 @@ static int io_open (lua_State *L) {
 */
 static int io_pclose (lua_State *L) {
   LStream *p = tolstream(L);
-  errno = 0;
   return luaL_execresult(L, l_pclose(L, p->f));
 }
 
@@ -291,7 +277,8 @@ static int io_popen (lua_State *L) {
   const char *filename = luaL_checkstring(L, 1);
   const char *mode = luaL_optstring(L, 2, "r");
   LStream *p = newprefile(L);
-  luaL_argcheck(L, l_checkmodep(mode), 2, "invalid mode");
+  luaL_argcheck(L, ((mode[0] == 'r' || mode[0] == 'w') && mode[1] == '\0'),
+                   2, "invalid mode");
   p->f = l_popen(L, filename, mode);
   p->closef = &io_pclose;
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
@@ -309,8 +296,8 @@ static FILE *getiofile (lua_State *L, const char *findex) {
   LStream *p;
   lua_getfield(L, LUA_REGISTRYINDEX, findex);
   p = (LStream *)lua_touserdata(L, -1);
-  if (l_unlikely(isclosed(p)))
-    luaL_error(L, "default %s file is closed", findex + IOPREF_LEN);
+  if (isclosed(p))
+    luaL_error(L, "standard %s file is closed", findex + IOPREF_LEN);
   return p->f;
 }
 
@@ -351,22 +338,12 @@ static int io_readline (lua_State *L);
 */
 #define MAXARGLINE	250
 
-/*
-** Auxiliary function to create the iteration function for 'lines'.
-** The iteration function is a closure over 'io_readline', with
-** the following upvalues:
-** 1) The file being read (first value in the stack)
-** 2) the number of arguments to read
-** 3) a boolean, true iff file has to be closed when finished ('toclose')
-** *) a variable number of format arguments (rest of the stack)
-*/
 static void aux_lines (lua_State *L, int toclose) {
   int n = lua_gettop(L) - 1;  /* number of arguments to read */
   luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
-  lua_pushvalue(L, 1);  /* file */
   lua_pushinteger(L, n);  /* number of arguments to read */
   lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  lua_rotate(L, 2, 3);  /* move the three values to their positions */
+  lua_rotate(L, 2, 2);  /* move 'n' and 'toclose' to their positions */
   lua_pushcclosure(L, io_readline, 3 + n);
 }
 
@@ -378,11 +355,6 @@ static int f_lines (lua_State *L) {
 }
 
 
-/*
-** Return an iteration function for 'io.lines'. If file has to be
-** closed, also returns the file itself as a second result (to be
-** closed as the state at the exit of a generic for).
-*/
 static int io_lines (lua_State *L) {
   int toclose;
   if (lua_isnone(L, 1)) lua_pushnil(L);  /* at least one argument */
@@ -398,15 +370,8 @@ static int io_lines (lua_State *L) {
     lua_replace(L, 1);  /* put file at index 1 */
     toclose = 1;  /* close it after iteration */
   }
-  aux_lines(L, toclose);  /* push iteration function */
-  if (toclose) {
-    lua_pushnil(L);  /* state */
-    lua_pushnil(L);  /* control */
-    lua_pushvalue(L, 1);  /* file is the to-be-closed variable (4th result) */
-    return 4;
-  }
-  else
-    return 1;
+  aux_lines(L, toclose);
+  return 1;
 }
 
 
@@ -436,7 +401,7 @@ typedef struct {
 ** Add current char to buffer (if not out of space) and read next one
 */
 static int nextc (RN *rn) {
-  if (l_unlikely(rn->n >= L_MAXLENNUM)) {  /* buffer overflow? */
+  if (rn->n >= L_MAXLENNUM) {  /* buffer overflow? */
     rn->buff[0] = '\0';  /* invalidate result */
     return 0;  /* fail */
   }
@@ -472,7 +437,7 @@ static int readdigits (RN *rn, int hex) {
 /*
 ** Read a number: first reads a valid prefix of a numeral into a buffer.
 ** Then it calls 'lua_stringtonumber' to check whether the format is
-** correct and to convert it to a Lua number.
+** correct and to convert it to a Lua number
 */
 static int read_number (lua_State *L, FILE *f) {
   RN rn;
@@ -484,7 +449,7 @@ static int read_number (lua_State *L, FILE *f) {
   decp[1] = '.';  /* always accept a dot */
   l_lockfile(rn.f);
   do { rn.c = l_getc(rn.f); } while (isspace(rn.c));  /* skip spaces */
-  test2(&rn, "-+");  /* optional sign */
+  test2(&rn, "-+");  /* optional signal */
   if (test2(&rn, "00")) {
     if (test2(&rn, "xX")) hex = 1;  /* numeral is hexadecimal */
     else count = 1;  /* count initial '0' as a valid digit */
@@ -493,14 +458,14 @@ static int read_number (lua_State *L, FILE *f) {
   if (test2(&rn, decp))  /* decimal point? */
     count += readdigits(&rn, hex);  /* fractional part */
   if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) {  /* exponent mark? */
-    test2(&rn, "-+");  /* exponent sign */
+    test2(&rn, "-+");  /* exponent signal */
     readdigits(&rn, 0);  /* exponent digits */
   }
   ungetc(rn.c, rn.f);  /* unread look-ahead char */
   l_unlockfile(rn.f);
   rn.buff[rn.n] = '\0';  /* finish string */
-  if (l_likely(lua_stringtonumber(L, rn.buff)))
-    return 1;  /* ok, it is a valid number */
+  if (lua_stringtonumber(L, rn.buff))  /* is this a valid number? */
+    return 1;  /* ok */
   else {  /* invalid format */
    lua_pushnil(L);  /* "result" to be removed */
    return 0;  /* read fails */
@@ -518,17 +483,17 @@ static int test_eof (lua_State *L, FILE *f) {
 
 static int read_line (lua_State *L, FILE *f, int chop) {
   luaL_Buffer b;
-  int c;
+  int c = '\0';
   luaL_buffinit(L, &b);
-  do {  /* may need to read several chunks to get whole line */
-    char *buff = luaL_prepbuffer(&b);  /* preallocate buffer space */
+  while (c != EOF && c != '\n') {  /* repeat until end of line */
+    char *buff = luaL_prepbuffer(&b);  /* preallocate buffer */
     int i = 0;
     l_lockfile(f);  /* no memory errors can happen inside the lock */
     while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n')
-      buff[i++] = c;  /* read up to end of line or buffer limit */
+      buff[i++] = c;
     l_unlockfile(f);
     luaL_addsize(&b, i);
-  } while (c != EOF && c != '\n');  /* repeat until end of line */
+  }
   if (!chop && c == '\n')  /* want a newline and have one? */
     luaL_addchar(&b, c);  /* add ending newline to result */
   luaL_pushresult(&b);  /* close buffer */
@@ -565,14 +530,14 @@ static int read_chars (lua_State *L, FILE *f, size_t n) {
 
 static int g_read (lua_State *L, FILE *f, int first) {
   int nargs = lua_gettop(L) - 1;
-  int n, success;
+  int success;
+  int n;
   clearerr(f);
   if (nargs == 0) {  /* no arguments? */
     success = read_line(L, f, 1);
-    n = first + 1;  /* to return 1 result */
+    n = first+1;  /* to return 1 result */
   }
-  else {
-    /* ensure stack space for all results and for auxlib's buffer */
+  else {  /* ensure stack space for all results and for auxlib's buffer */
     luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
     success = 1;
     for (n = first; nargs-- && success; n++) {
@@ -607,7 +572,7 @@ static int g_read (lua_State *L, FILE *f, int first) {
     return luaL_fileresult(L, 0, NULL);
   if (!success) {
     lua_pop(L, 1);  /* remove last result */
-    luaL_pushfail(L);  /* push nil instead */
+    lua_pushnil(L);  /* push nil instead */
   }
   return n - first;
 }
@@ -623,9 +588,6 @@ static int f_read (lua_State *L) {
 }
 
 
-/*
-** Iteration function for 'lines'.
-*/
 static int io_readline (lua_State *L) {
   LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
   int i;
@@ -640,14 +602,14 @@ static int io_readline (lua_State *L) {
   lua_assert(n > 0);  /* should return at least a nil */
   if (lua_toboolean(L, -n))  /* read at least one value? */
     return n;  /* return them */
-  else {  /* first result is false: EOF or error */
+  else {  /* first result is nil: EOF or error */
     if (n > 1) {  /* is there error information? */
       /* 2nd result is error message */
       return luaL_error(L, "%s", lua_tostring(L, -n + 1));
     }
     if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */
-      lua_settop(L, 0);  /* clear stack */
-      lua_pushvalue(L, lua_upvalueindex(1));  /* push file at index 1 */
+      lua_settop(L, 0);
+      lua_pushvalue(L, lua_upvalueindex(1));
       aux_close(L);  /* close it */
     }
     return 0;
@@ -676,8 +638,7 @@ static int g_write (lua_State *L, FILE *f, int arg) {
       status = status && (fwrite(s, sizeof(char), l, f) == l);
     }
   }
-  if (l_likely(status))
-    return 1;  /* file handle already on stack top */
+  if (status) return 1;  /* file handle already on stack top */
   else return luaL_fileresult(L, status, NULL);
 }
 
@@ -704,7 +665,7 @@ static int f_seek (lua_State *L) {
   luaL_argcheck(L, (lua_Integer)offset == p3, 3,
                   "not an integer in proper range");
   op = l_fseek(f, offset, mode[op]);
-  if (l_unlikely(op))
+  if (op)
     return luaL_fileresult(L, 0, NULL);  /* error */
   else {
     lua_pushinteger(L, (lua_Integer)l_ftell(f));
@@ -757,37 +718,26 @@ static const luaL_Reg iolib[] = {
 /*
 ** methods for file handles
 */
-static const luaL_Reg meth[] = {
-  {"read", f_read},
-  {"write", f_write},
-  {"lines", f_lines},
-  {"flush", f_flush},
-  {"seek", f_seek},
+static const luaL_Reg flib[] = {
   {"close", f_close},
+  {"flush", f_flush},
+  {"lines", f_lines},
+  {"read", f_read},
+  {"seek", f_seek},
   {"setvbuf", f_setvbuf},
-  {NULL, NULL}
-};
-
-
-/*
-** metamethods for file handles
-*/
-static const luaL_Reg metameth[] = {
-  {"__index", NULL},  /* place holder */
+  {"write", f_write},
   {"__gc", f_gc},
-  {"__close", f_gc},
   {"__tostring", f_tostring},
   {NULL, NULL}
 };
 
 
 static void createmeta (lua_State *L) {
-  luaL_newmetatable(L, LUA_FILEHANDLE);  /* metatable for file handles */
-  luaL_setfuncs(L, metameth, 0);  /* add metamethods to new metatable */
-  luaL_newlibtable(L, meth);  /* create method table */
-  luaL_setfuncs(L, meth, 0);  /* add file methods to method table */
-  lua_setfield(L, -2, "__index");  /* metatable.__index = method table */
-  lua_pop(L, 1);  /* pop metatable */
+  luaL_newmetatable(L, LUA_FILEHANDLE);  /* create metatable for file handles */
+  lua_pushvalue(L, -1);  /* push metatable */
+  lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
+  luaL_setfuncs(L, flib, 0);  /* add file methods to new metatable */
+  lua_pop(L, 1);  /* pop new metatable */
 }
 
 
@@ -797,7 +747,7 @@ static void createmeta (lua_State *L) {
 static int io_noclose (lua_State *L) {
   LStream *p = tolstream(L);
   p->closef = &io_noclose;  /* keep file opened */
-  luaL_pushfail(L);
+  lua_pushnil(L);
   lua_pushliteral(L, "cannot close standard file");
   return 2;
 }

ljumptab.h

@@ -1,112 +0,0 @@
-/*
-** $Id: ljumptab.h $
-** Jump Table for the Lua interpreter
-** See Copyright Notice in lua.h
-*/
-
-
-#undef vmdispatch
-#undef vmcase
-#undef vmbreak
-
-#define vmdispatch(x)     goto *disptab[x];
-
-#define vmcase(l)     L_##l:
-
-#define vmbreak		vmfetch(); vmdispatch(GET_OPCODE(i));
-
-
-static const void *const disptab[NUM_OPCODES] = {
-
-#if 0
-** you can update the following list with this command:
-**
-**  sed -n '/^OP_/\!d; s/OP_/\&\&L_OP_/ ; s/,.*/,/ ; s/\/.*// ; p'  lopcodes.h
-**
-#endif
-
-&&L_OP_MOVE,
-&&L_OP_LOADI,
-&&L_OP_LOADF,
-&&L_OP_LOADK,
-&&L_OP_LOADKX,
-&&L_OP_LOADFALSE,
-&&L_OP_LFALSESKIP,
-&&L_OP_LOADTRUE,
-&&L_OP_LOADNIL,
-&&L_OP_GETUPVAL,
-&&L_OP_SETUPVAL,
-&&L_OP_GETTABUP,
-&&L_OP_GETTABLE,
-&&L_OP_GETI,
-&&L_OP_GETFIELD,
-&&L_OP_SETTABUP,
-&&L_OP_SETTABLE,
-&&L_OP_SETI,
-&&L_OP_SETFIELD,
-&&L_OP_NEWTABLE,
-&&L_OP_SELF,
-&&L_OP_ADDI,
-&&L_OP_ADDK,
-&&L_OP_SUBK,
-&&L_OP_MULK,
-&&L_OP_MODK,
-&&L_OP_POWK,
-&&L_OP_DIVK,
-&&L_OP_IDIVK,
-&&L_OP_BANDK,
-&&L_OP_BORK,
-&&L_OP_BXORK,
-&&L_OP_SHRI,
-&&L_OP_SHLI,
-&&L_OP_ADD,
-&&L_OP_SUB,
-&&L_OP_MUL,
-&&L_OP_MOD,
-&&L_OP_POW,
-&&L_OP_DIV,
-&&L_OP_IDIV,
-&&L_OP_BAND,
-&&L_OP_BOR,
-&&L_OP_BXOR,
-&&L_OP_SHL,
-&&L_OP_SHR,
-&&L_OP_MMBIN,
-&&L_OP_MMBINI,
-&&L_OP_MMBINK,
-&&L_OP_UNM,
-&&L_OP_BNOT,
-&&L_OP_NOT,
-&&L_OP_LEN,
-&&L_OP_CONCAT,
-&&L_OP_CLOSE,
-&&L_OP_TBC,
-&&L_OP_JMP,
-&&L_OP_EQ,
-&&L_OP_LT,
-&&L_OP_LE,
-&&L_OP_EQK,
-&&L_OP_EQI,
-&&L_OP_LTI,
-&&L_OP_LEI,
-&&L_OP_GTI,
-&&L_OP_GEI,
-&&L_OP_TEST,
-&&L_OP_TESTSET,
-&&L_OP_CALL,
-&&L_OP_TAILCALL,
-&&L_OP_RETURN,
-&&L_OP_RETURN0,
-&&L_OP_RETURN1,
-&&L_OP_FORLOOP,
-&&L_OP_FORPREP,
-&&L_OP_TFORPREP,
-&&L_OP_TFORCALL,
-&&L_OP_TFORLOOP,
-&&L_OP_SETLIST,
-&&L_OP_CLOSURE,
-&&L_OP_VARARG,
-&&L_OP_VARARGPREP,
-&&L_OP_EXTRAARG
-
-};

llex.c

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c $
+** $Id: llex.c,v 2.96.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -29,7 +29,7 @@
 
 
 
-#define next(ls)	(ls->current = zgetc(ls->z))
+#define next(ls) (ls->current = zgetc(ls->z))
 
 
 
@@ -63,7 +63,7 @@ static void save (LexState *ls, int c) {
     newsize = luaZ_sizebuffer(b) * 2;
     luaZ_resizebuffer(ls->L, b, newsize);
   }
-  b->buffer[luaZ_bufflen(b)++] = cast_char(c);
+  b->buffer[luaZ_bufflen(b)++] = cast(char, c);
 }
 
 
@@ -81,10 +81,8 @@ void luaX_init (lua_State *L) {
 
 const char *luaX_token2str (LexState *ls, int token) {
   if (token < FIRST_RESERVED) {  /* single-byte symbols? */
-    if (lisprint(token))
-      return luaO_pushfstring(ls->L, "'%c'", token);
-    else  /* control character */
-      return luaO_pushfstring(ls->L, "'<\\%d>'", token);
+    lua_assert(token == cast_uchar(token));
+    return luaO_pushfstring(ls->L, "'%c'", token);
   }
   else {
     const char *s = luaX_tokens[token - FIRST_RESERVED];
@@ -122,29 +120,26 @@ l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
 
 
 /*
-** Creates a new string and anchors it in scanner's table so that it
-** will not be collected until the end of the compilation; by that time
-** it should be anchored somewhere. It also internalizes long strings,
-** ensuring there is only one copy of each unique string.  The table
-** here is used as a set: the string enters as the key, while its value
-** is irrelevant. We use the string itself as the value only because it
-** is a TValue readly available. Later, the code generation can change
-** this value.
+** creates a new string and anchors it in scanner's table so that
+** it will not be collected until the end of the compilation
+** (by that time it should be anchored somewhere)
 */
 TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   lua_State *L = ls->L;
+  TValue *o;  /* entry for 'str' */
   TString *ts = luaS_newlstr(L, str, l);  /* create new string */
-  const TValue *o = luaH_getstr(ls->h, ts);
-  if (!ttisnil(o))  /* string already present? */
-    ts = keystrval(nodefromval(o));  /* get saved copy */
-  else {  /* not in use yet */
-    TValue *stv = s2v(L->top++);  /* reserve stack space for string */
-    setsvalue(L, stv, ts);  /* temporarily anchor the string */
-    luaH_finishset(L, ls->h, stv, o, stv);  /* t[string] = string */
-    /* table is not a metatable, so it does not need to invalidate cache */
+  setsvalue2s(L, L->top++, ts);  /* temporarily anchor it in stack */
+  o = luaH_set(L, ls->h, L->top - 1);
+  if (ttisnil(o)) {  /* not in use yet? */
+    /* boolean value does not need GC barrier;
+       table has no metatable, so it does not need to invalidate cache */
+    setbvalue(o, 1);  /* t[string] = true */
     luaC_checkGC(L);
-    L->top--;  /* remove string from stack */
   }
+  else {  /* string already present */
+    ts = tsvalue(keyfromval(o));  /* re-use value previously stored */
+  }
+  L->top--;  /* remove string from stack */
   return ts;
 }
 
@@ -213,16 +208,8 @@ static int check_next2 (LexState *ls, const char *set) {
 
 /* LUA_NUMBER */
 /*
-** This function is quite liberal in what it accepts, as 'luaO_str2num'
-** will reject ill-formed numerals. Roughly, it accepts the following
-** pattern:
-**
-**   %d(%x|%.|([Ee][+-]?))* | 0[Xx](%x|%.|([Pp][+-]?))*
-**
-** The only tricky part is to accept [+-] only after a valid exponent
-** mark, to avoid reading '3-4' or '0xe+1' as a single number.
-**
-** The caller might have already read an initial dot.
+** this function is quite liberal in what it accepts, as 'luaO_str2num'
+** will reject ill-formed numerals.
 */
 static int read_numeral (LexState *ls, SemInfo *seminfo) {
   TValue obj;
@@ -233,14 +220,14 @@ static int read_numeral (LexState *ls, SemInfo *seminfo) {
   if (first == '0' && check_next2(ls, "xX"))  /* hexadecimal? */
     expo = "Pp";
   for (;;) {
-    if (check_next2(ls, expo))  /* exponent mark? */
+    if (check_next2(ls, expo))  /* exponent part? */
       check_next2(ls, "-+");  /* optional exponent sign */
-    else if (lisxdigit(ls->current) || ls->current == '.')  /* '%x|%.' */
+    if (lisxdigit(ls->current))
+      save_and_next(ls);
+    else if (ls->current == '.')
       save_and_next(ls);
     else break;
   }
-  if (lislalpha(ls->current))  /* is numeral touching a letter? */
-    save_and_next(ls);  /* force an error */
   save(ls, '\0');
   if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0)  /* format error? */
     lexerror(ls, "malformed number", TK_FLT);
@@ -257,10 +244,9 @@ static int read_numeral (LexState *ls, SemInfo *seminfo) {
 
 
 /*
-** read a sequence '[=*[' or ']=*]', leaving the last bracket. If
-** sequence is well formed, return its number of '='s + 2; otherwise,
-** return 1 if it is a single bracket (no '='s and no 2nd bracket);
-** otherwise (an unfinished '[==...') return 0.
+** reads a sequence '[=*[' or ']=*]', leaving the last bracket.
+** If sequence is well formed, return its number of '='s + 2; otherwise,
+** return 1 if there is no '='s or 0 otherwise (an unfinished '[==...').
 */
 static size_t skip_sep (LexState *ls) {
   size_t count = 0;
@@ -274,6 +260,7 @@ static size_t skip_sep (LexState *ls) {
   return (ls->current == s) ? count + 2
          : (count == 0) ? 1
          : 0;
+
 }
 
 
@@ -346,10 +333,10 @@ static unsigned long readutf8esc (LexState *ls) {
   save_and_next(ls);  /* skip 'u' */
   esccheck(ls, ls->current == '{', "missing '{'");
   r = gethexa(ls);  /* must have at least one digit */
-  while (cast_void(save_and_next(ls)), lisxdigit(ls->current)) {
+  while ((save_and_next(ls), lisxdigit(ls->current))) {
     i++;
-    esccheck(ls, r <= (0x7FFFFFFFu >> 4), "UTF-8 value too large");
     r = (r << 4) + luaO_hexavalue(ls->current);
+    esccheck(ls, r <= 0x10FFFF, "UTF-8 value too large");
   }
   esccheck(ls, ls->current == '}', "missing '}'");
   next(ls);  /* skip '}' */
@@ -479,40 +466,40 @@ static int llex (LexState *ls, SemInfo *seminfo) {
           read_long_string(ls, seminfo, sep);
           return TK_STRING;
         }
-        else if (sep == 0)  /* '[=...' missing second bracket? */
+        else if (sep == 0)  /* '[=...' missing second bracket */
           lexerror(ls, "invalid long string delimiter", TK_STRING);
         return '[';
       }
       case '=': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_EQ;  /* '==' */
+        if (check_next1(ls, '=')) return TK_EQ;
         else return '=';
       }
       case '<': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_LE;  /* '<=' */
-        else if (check_next1(ls, '<')) return TK_SHL;  /* '<<' */
+        if (check_next1(ls, '=')) return TK_LE;
+        else if (check_next1(ls, '<')) return TK_SHL;
         else return '<';
       }
       case '>': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_GE;  /* '>=' */
-        else if (check_next1(ls, '>')) return TK_SHR;  /* '>>' */
+        if (check_next1(ls, '=')) return TK_GE;
+        else if (check_next1(ls, '>')) return TK_SHR;
         else return '>';
       }
       case '/': {
         next(ls);
-        if (check_next1(ls, '/')) return TK_IDIV;  /* '//' */
+        if (check_next1(ls, '/')) return TK_IDIV;
         else return '/';
       }
       case '~': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_NE;  /* '~=' */
+        if (check_next1(ls, '=')) return TK_NE;
         else return '~';
       }
       case ':': {
         next(ls);
-        if (check_next1(ls, ':')) return TK_DBCOLON;  /* '::' */
+        if (check_next1(ls, ':')) return TK_DBCOLON;
         else return ':';
       }
       case '"': case '\'': {  /* short literal strings */
@@ -551,7 +538,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
             return TK_NAME;
           }
         }
-        else {  /* single-char tokens ('+', '*', '%', '{', '}', ...) */
+        else {  /* single-char tokens (+ - / ...) */
           int c = ls->current;
           next(ls);
           return c;

llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h $
+** $Id: llex.h,v 1.79.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -7,17 +7,11 @@
 #ifndef llex_h
 #define llex_h
 
-#include <limits.h>
-
 #include "lobject.h"
 #include "lzio.h"
 
 
-/*
-** Single-char tokens (terminal symbols) are represented by their own
-** numeric code. Other tokens start at the following value.
-*/
-#define FIRST_RESERVED	(UCHAR_MAX + 1)
+#define FIRST_RESERVED	257
 
 
 #if !defined(LUA_ENV)
@@ -43,7 +37,7 @@ enum RESERVED {
 };
 
 /* number of reserved words */
-#define NUM_RESERVED	(cast_int(TK_WHILE-FIRST_RESERVED + 1))
+#define NUM_RESERVED	(cast(int, TK_WHILE-FIRST_RESERVED+1))
 
 
 typedef union {

llimits.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llimits.h $
+** $Id: llimits.h,v 1.141.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Limits, basic types, and some other 'installation-dependent' definitions
 ** See Copyright Notice in lua.h
 */
@@ -14,7 +14,6 @@
 
 #include "lua.h"
 
-
 /*
 ** 'lu_mem' and 'l_mem' are unsigned/signed integers big enough to count
 ** the total memory used by Lua (in bytes). Usually, 'size_t' and
@@ -23,7 +22,7 @@
 #if defined(LUAI_MEM)		/* { external definitions? */
 typedef LUAI_UMEM lu_mem;
 typedef LUAI_MEM l_mem;
-#elif LUAI_IS32INT	/* }{ */
+#elif LUAI_BITSINT >= 32	/* }{ */
 typedef size_t lu_mem;
 typedef ptrdiff_t l_mem;
 #else  /* 16-bit ints */	/* }{ */
@@ -34,13 +33,12 @@ typedef long l_mem;
 
 /* chars used as small naturals (so that 'char' is reserved for characters) */
 typedef unsigned char lu_byte;
-typedef signed char ls_byte;
 
 
 /* maximum value for size_t */
 #define MAX_SIZET	((size_t)(~(size_t)0))
 
-/* maximum size visible for Lua (must be representable in a lua_Integer) */
+/* maximum size visible for Lua (must be representable in a lua_Integer */
 #define MAX_SIZE	(sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
                           : (size_t)(LUA_MAXINTEGER))
 
@@ -53,23 +51,6 @@ typedef signed char ls_byte;
 #define MAX_INT		INT_MAX  /* maximum value of an int */
 
 
-/*
-** floor of the log2 of the maximum signed value for integral type 't'.
-** (That is, maximum 'n' such that '2^n' fits in the given signed type.)
-*/
-#define log2maxs(t)	(sizeof(t) * 8 - 2)
-
-
-/*
-** test whether an unsigned value is a power of 2 (or zero)
-*/
-#define ispow2(x)	(((x) & ((x) - 1)) == 0)
-
-
-/* number of chars of a literal string without the ending \0 */
-#define LL(x)   (sizeof(x)/sizeof(char) - 1)
-
-
 /*
 ** conversion of pointer to unsigned integer:
 ** this is for hashing only; there is no problem if the integer
@@ -79,20 +60,27 @@ typedef signed char ls_byte;
 
 
 
+/* type to ensure maximum alignment */
+#if defined(LUAI_USER_ALIGNMENT_T)
+typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
+#else
+typedef union {
+  lua_Number n;
+  double u;
+  void *s;
+  lua_Integer i;
+  long l;
+} L_Umaxalign;
+#endif
+
+
+
 /* types of 'usual argument conversions' for lua_Number and lua_Integer */
 typedef LUAI_UACNUMBER l_uacNumber;
 typedef LUAI_UACINT l_uacInt;
 
 
-/*
-** Internal assertions for in-house debugging
-*/
-#if defined LUAI_ASSERT
-#undef NDEBUG
-#include <assert.h>
-#define lua_assert(c)           assert(c)
-#endif
-
+/* internal assertions for in-house debugging */
 #if defined(lua_assert)
 #define check_exp(c,e)		(lua_assert(c), (e))
 /* to avoid problems with conditions too long */
@@ -107,7 +95,7 @@ typedef LUAI_UACINT l_uacInt;
 ** assertion for checking API calls
 */
 #if !defined(luai_apicheck)
-#define luai_apicheck(l,e)	((void)l, lua_assert(e))
+#define luai_apicheck(l,e)	lua_assert(e)
 #endif
 
 #define api_check(l,e,msg)	luai_apicheck(l,(e) && msg)
@@ -123,15 +111,10 @@ typedef LUAI_UACINT l_uacInt;
 #define cast(t, exp)	((t)(exp))
 
 #define cast_void(i)	cast(void, (i))
-#define cast_voidp(i)	cast(void *, (i))
+#define cast_byte(i)	cast(lu_byte, (i))
 #define cast_num(i)	cast(lua_Number, (i))
 #define cast_int(i)	cast(int, (i))
-#define cast_uint(i)	cast(unsigned int, (i))
-#define cast_byte(i)	cast(lu_byte, (i))
 #define cast_uchar(i)	cast(unsigned char, (i))
-#define cast_char(i)	cast(char, (i))
-#define cast_charp(i)	cast(char *, (i))
-#define cast_sizet(i)	cast(size_t, (i))
 
 
 /* cast a signed lua_Integer to lua_Unsigned */
@@ -152,8 +135,6 @@ typedef LUAI_UACINT l_uacInt;
 /*
 ** non-return type
 */
-#if !defined(l_noret)
-
 #if defined(__GNUC__)
 #define l_noret		void __attribute__((noreturn))
 #elif defined(_MSC_VER) && _MSC_VER >= 1200
@@ -162,21 +143,28 @@ typedef LUAI_UACINT l_uacInt;
 #define l_noret		void
 #endif
 
+
+
+/*
+** maximum depth for nested C calls and syntactical nested non-terminals
+** in a program. (Value must fit in an unsigned short int.)
+*/
+#if !defined(LUAI_MAXCCALLS)
+#define LUAI_MAXCCALLS		200
 #endif
 
 
+
 /*
 ** type for virtual-machine instructions;
 ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
 */
-#if LUAI_IS32INT
-typedef unsigned int l_uint32;
+#if LUAI_BITSINT >= 32
+typedef unsigned int Instruction;
 #else
-typedef unsigned long l_uint32;
+typedef unsigned long Instruction;
 #endif
 
-typedef l_uint32 Instruction;
-
 
 
 /*
@@ -218,17 +206,6 @@ typedef l_uint32 Instruction;
 #endif
 
 
-/*
-** Maximum depth for nested C calls, syntactical nested non-terminals,
-** and other features implemented through recursion in C. (Value must
-** fit in a 16-bit unsigned integer. It must also be compatible with
-** the size of the C stack.)
-*/
-#if !defined(LUAI_MAXCCALLS)
-#define LUAI_MAXCCALLS		200
-#endif
-
-
 /*
 ** macros that are executed whenever program enters the Lua core
 ** ('lua_lock') and leaves the core ('lua_unlock')
@@ -248,7 +225,8 @@ typedef l_uint32 Instruction;
 
 
 /*
-** these macros allow user-specific actions when a thread is
+** these macros allow user-specific actions on threads when you defined
+** LUAI_EXTRASPACE and need to do something extra when a thread is
 ** created/deleted/resumed/yielded.
 */
 #if !defined(luai_userstateopen)
@@ -292,26 +270,20 @@ typedef l_uint32 Instruction;
 #endif
 
 /*
-** modulo: defined as 'a - floor(a/b)*b'; the direct computation
-** using this definition has several problems with rounding errors,
-** so it is better to use 'fmod'. 'fmod' gives the result of
-** 'a - trunc(a/b)*b', and therefore must be corrected when
-** 'trunc(a/b) ~= floor(a/b)'. That happens when the division has a
-** non-integer negative result: non-integer result is equivalent to
-** a non-zero remainder 'm'; negative result is equivalent to 'a' and
-** 'b' with different signs, or 'm' and 'b' with different signs
-** (as the result 'm' of 'fmod' has the same sign of 'a').
+** modulo: defined as 'a - floor(a/b)*b'; this definition gives NaN when
+** 'b' is huge, but the result should be 'a'. 'fmod' gives the result of
+** 'a - trunc(a/b)*b', and therefore must be corrected when 'trunc(a/b)
+** ~= floor(a/b)'. That happens when the division has a non-integer
+** negative result, which is equivalent to the test below.
 */
 #if !defined(luai_nummod)
 #define luai_nummod(L,a,b,m)  \
-  { (void)L; (m) = l_mathop(fmod)(a,b); \
-    if (((m) > 0) ? (b) < 0 : ((m) < 0 && (b) > 0)) (m) += (b); }
+  { (m) = l_mathop(fmod)(a,b); if ((m)*(b) < 0) (m) += (b); }
 #endif
 
 /* exponentiation */
 #if !defined(luai_numpow)
-#define luai_numpow(L,a,b)  \
-  ((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b))
+#define luai_numpow(L,a,b)      ((void)L, l_mathop(pow)(a,b))
 #endif
 
 /* the others are quite standard operations */
@@ -323,8 +295,6 @@ typedef l_uint32 Instruction;
 #define luai_numeq(a,b)         ((a)==(b))
 #define luai_numlt(a,b)         ((a)<(b))
 #define luai_numle(a,b)         ((a)<=(b))
-#define luai_numgt(a,b)         ((a)>(b))
-#define luai_numge(a,b)         ((a)>=(b))
 #define luai_numisnan(a)        (!luai_numeq((a), (a)))
 #endif
 
@@ -340,7 +310,7 @@ typedef l_uint32 Instruction;
 #else
 /* realloc stack keeping its size */
 #define condmovestack(L,pre,pos)  \
-  { int sz_ = stacksize(L); pre; luaD_reallocstack((L), sz_, 0); pos; }
+	{ int sz_ = (L)->stacksize; pre; luaD_reallocstack((L), sz_); pos; }
 #endif
 
 #if !defined(HARDMEMTESTS)

lmathlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c $
+** $Id: lmathlib.c,v 1.119.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -10,11 +10,8 @@
 #include "lprefix.h"
 
 
-#include <float.h>
-#include <limits.h>
-#include <math.h>
 #include <stdlib.h>
-#include <time.h>
+#include <math.h>
 
 #include "lua.h"
 
@@ -26,6 +23,19 @@
 #define PI	(l_mathop(3.141592653589793238462643383279502884))
 
 
+#if !defined(l_rand)		/* { */
+#if defined(LUA_USE_POSIX)
+#define l_rand()	random()
+#define l_srand(x)	srandom(x)
+#define L_RANDMAX	2147483647	/* (2^31 - 1), following POSIX */
+#else
+#define l_rand()	rand()
+#define l_srand(x)	srand(x)
+#define L_RANDMAX	RAND_MAX
+#endif
+#endif				/* } */
+
+
 static int math_abs (lua_State *L) {
   if (lua_isinteger(L, 1)) {
     lua_Integer n = lua_tointeger(L, 1);
@@ -73,11 +83,11 @@ static int math_atan (lua_State *L) {
 static int math_toint (lua_State *L) {
   int valid;
   lua_Integer n = lua_tointegerx(L, 1, &valid);
-  if (l_likely(valid))
+  if (valid)
     lua_pushinteger(L, n);
   else {
     luaL_checkany(L, 1);
-    luaL_pushfail(L);  /* value is not convertible to integer */
+    lua_pushnil(L);  /* value is not convertible to integer */
   }
   return 1;
 }
@@ -175,8 +185,7 @@ static int math_log (lua_State *L) {
     lua_Number base = luaL_checknumber(L, 2);
 #if !defined(LUA_USE_C89)
     if (base == l_mathop(2.0))
-      res = l_mathop(log2)(x);
-    else
+      res = l_mathop(log2)(x); else
 #endif
     if (base == l_mathop(10.0))
       res = l_mathop(log10)(x);
@@ -230,347 +239,22 @@ static int math_max (lua_State *L) {
   return 1;
 }
 
-
-static int math_type (lua_State *L) {
-  if (lua_type(L, 1) == LUA_TNUMBER)
-    lua_pushstring(L, (lua_isinteger(L, 1)) ? "integer" : "float");
-  else {
-    luaL_checkany(L, 1);
-    luaL_pushfail(L);
-  }
-  return 1;
-}
-
-
-
 /*
-** {==================================================================
-** Pseudo-Random Number Generator based on 'xoshiro256**'.
-** ===================================================================
+** This function uses 'double' (instead of 'lua_Number') to ensure that
+** all bits from 'l_rand' can be represented, and that 'RANDMAX + 1.0'
+** will keep full precision (ensuring that 'r' is always less than 1.0.)
 */
-
-/* number of binary digits in the mantissa of a float */
-#define FIGS	l_floatatt(MANT_DIG)
-
-#if FIGS > 64
-/* there are only 64 random bits; use them all */
-#undef FIGS
-#define FIGS	64
-#endif
-
-
-/*
-** LUA_RAND32 forces the use of 32-bit integers in the implementation
-** of the PRN generator (mainly for testing).
-*/
-#if !defined(LUA_RAND32) && !defined(Rand64)
-
-/* try to find an integer type with at least 64 bits */
-
-#if (ULONG_MAX >> 31 >> 31) >= 3
-
-/* 'long' has at least 64 bits */
-#define Rand64		unsigned long
-
-#elif !defined(LUA_USE_C89) && defined(LLONG_MAX)
-
-/* there is a 'long long' type (which must have at least 64 bits) */
-#define Rand64		unsigned long long
-
-#elif (LUA_MAXUNSIGNED >> 31 >> 31) >= 3
-
-/* 'lua_Integer' has at least 64 bits */
-#define Rand64		lua_Unsigned
-
-#endif
-
-#endif
-
-
-#if defined(Rand64)  /* { */
-
-/*
-** Standard implementation, using 64-bit integers.
-** If 'Rand64' has more than 64 bits, the extra bits do not interfere
-** with the 64 initial bits, except in a right shift. Moreover, the
-** final result has to discard the extra bits.
-*/
-
-/* avoid using extra bits when needed */
-#define trim64(x)	((x) & 0xffffffffffffffffu)
-
-
-/* rotate left 'x' by 'n' bits */
-static Rand64 rotl (Rand64 x, int n) {
-  return (x << n) | (trim64(x) >> (64 - n));
-}
-
-static Rand64 nextrand (Rand64 *state) {
-  Rand64 state0 = state[0];
-  Rand64 state1 = state[1];
-  Rand64 state2 = state[2] ^ state0;
-  Rand64 state3 = state[3] ^ state1;
-  Rand64 res = rotl(state1 * 5, 7) * 9;
-  state[0] = state0 ^ state3;
-  state[1] = state1 ^ state2;
-  state[2] = state2 ^ (state1 << 17);
-  state[3] = rotl(state3, 45);
-  return res;
-}
-
-
-/* must take care to not shift stuff by more than 63 slots */
-
-
-/*
-** Convert bits from a random integer into a float in the
-** interval [0,1), getting the higher FIG bits from the
-** random unsigned integer and converting that to a float.
-*/
-
-/* must throw out the extra (64 - FIGS) bits */
-#define shift64_FIG	(64 - FIGS)
-
-/* to scale to [0, 1), multiply by scaleFIG = 2^(-FIGS) */
-#define scaleFIG	(l_mathop(0.5) / ((Rand64)1 << (FIGS - 1)))
-
-static lua_Number I2d (Rand64 x) {
-  return (lua_Number)(trim64(x) >> shift64_FIG) * scaleFIG;
-}
-
-/* convert a 'Rand64' to a 'lua_Unsigned' */
-#define I2UInt(x)	((lua_Unsigned)trim64(x))
-
-/* convert a 'lua_Unsigned' to a 'Rand64' */
-#define Int2I(x)	((Rand64)(x))
-
-
-#else	/* no 'Rand64'   }{ */
-
-/* get an integer with at least 32 bits */
-#if LUAI_IS32INT
-typedef unsigned int lu_int32;
-#else
-typedef unsigned long lu_int32;
-#endif
-
-
-/*
-** Use two 32-bit integers to represent a 64-bit quantity.
-*/
-typedef struct Rand64 {
-  lu_int32 h;  /* higher half */
-  lu_int32 l;  /* lower half */
-} Rand64;
-
-
-/*
-** If 'lu_int32' has more than 32 bits, the extra bits do not interfere
-** with the 32 initial bits, except in a right shift and comparisons.
-** Moreover, the final result has to discard the extra bits.
-*/
-
-/* avoid using extra bits when needed */
-#define trim32(x)	((x) & 0xffffffffu)
-
-
-/*
-** basic operations on 'Rand64' values
-*/
-
-/* build a new Rand64 value */
-static Rand64 packI (lu_int32 h, lu_int32 l) {
-  Rand64 result;
-  result.h = h;
-  result.l = l;
-  return result;
-}
-
-/* return i << n */
-static Rand64 Ishl (Rand64 i, int n) {
-  lua_assert(n > 0 && n < 32);
-  return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n);
-}
-
-/* i1 ^= i2 */
-static void Ixor (Rand64 *i1, Rand64 i2) {
-  i1->h ^= i2.h;
-  i1->l ^= i2.l;
-}
-
-/* return i1 + i2 */
-static Rand64 Iadd (Rand64 i1, Rand64 i2) {
-  Rand64 result = packI(i1.h + i2.h, i1.l + i2.l);
-  if (trim32(result.l) < trim32(i1.l))  /* carry? */
-    result.h++;
-  return result;
-}
-
-/* return i * 5 */
-static Rand64 times5 (Rand64 i) {
-  return Iadd(Ishl(i, 2), i);  /* i * 5 == (i << 2) + i */
-}
-
-/* return i * 9 */
-static Rand64 times9 (Rand64 i) {
-  return Iadd(Ishl(i, 3), i);  /* i * 9 == (i << 3) + i */
-}
-
-/* return 'i' rotated left 'n' bits */
-static Rand64 rotl (Rand64 i, int n) {
-  lua_assert(n > 0 && n < 32);
-  return packI((i.h << n) | (trim32(i.l) >> (32 - n)),
-               (trim32(i.h) >> (32 - n)) | (i.l << n));
-}
-
-/* for offsets larger than 32, rotate right by 64 - offset */
-static Rand64 rotl1 (Rand64 i, int n) {
-  lua_assert(n > 32 && n < 64);
-  n = 64 - n;
-  return packI((trim32(i.h) >> n) | (i.l << (32 - n)),
-               (i.h << (32 - n)) | (trim32(i.l) >> n));
-}
-
-/*
-** implementation of 'xoshiro256**' algorithm on 'Rand64' values
-*/
-static Rand64 nextrand (Rand64 *state) {
-  Rand64 res = times9(rotl(times5(state[1]), 7));
-  Rand64 t = Ishl(state[1], 17);
-  Ixor(&state[2], state[0]);
-  Ixor(&state[3], state[1]);
-  Ixor(&state[1], state[2]);
-  Ixor(&state[0], state[3]);
-  Ixor(&state[2], t);
-  state[3] = rotl1(state[3], 45);
-  return res;
-}
-
-
-/*
-** Converts a 'Rand64' into a float.
-*/
-
-/* an unsigned 1 with proper type */
-#define UONE		((lu_int32)1)
-
-
-#if FIGS <= 32
-
-/* 2^(-FIGS) */
-#define scaleFIG       (l_mathop(0.5) / (UONE << (FIGS - 1)))
-
-/*
-** get up to 32 bits from higher half, shifting right to
-** throw out the extra bits.
-*/
-static lua_Number I2d (Rand64 x) {
-  lua_Number h = (lua_Number)(trim32(x.h) >> (32 - FIGS));
-  return h * scaleFIG;
-}
-
-#else	/* 32 < FIGS <= 64 */
-
-/* must take care to not shift stuff by more than 31 slots */
-
-/* 2^(-FIGS) = 1.0 / 2^30 / 2^3 / 2^(FIGS-33) */
-#define scaleFIG  \
-	((lua_Number)1.0 / (UONE << 30) / 8.0 / (UONE << (FIGS - 33)))
-
-/*
-** use FIGS - 32 bits from lower half, throwing out the other
-** (32 - (FIGS - 32)) = (64 - FIGS) bits
-*/
-#define shiftLOW	(64 - FIGS)
-
-/*
-** higher 32 bits go after those (FIGS - 32) bits: shiftHI = 2^(FIGS - 32)
-*/
-#define shiftHI		((lua_Number)(UONE << (FIGS - 33)) * 2.0)
-
-
-static lua_Number I2d (Rand64 x) {
-  lua_Number h = (lua_Number)trim32(x.h) * shiftHI;
-  lua_Number l = (lua_Number)(trim32(x.l) >> shiftLOW);
-  return (h + l) * scaleFIG;
-}
-
-#endif
-
-
-/* convert a 'Rand64' to a 'lua_Unsigned' */
-static lua_Unsigned I2UInt (Rand64 x) {
-  return ((lua_Unsigned)trim32(x.h) << 31 << 1) | (lua_Unsigned)trim32(x.l);
-}
-
-/* convert a 'lua_Unsigned' to a 'Rand64' */
-static Rand64 Int2I (lua_Unsigned n) {
-  return packI((lu_int32)(n >> 31 >> 1), (lu_int32)n);
-}
-
-#endif  /* } */
-
-
-/*
-** A state uses four 'Rand64' values.
-*/
-typedef struct {
-  Rand64 s[4];
-} RanState;
-
-
-/*
-** Project the random integer 'ran' into the interval [0, n].
-** Because 'ran' has 2^B possible values, the projection can only be
-** uniform when the size of the interval is a power of 2 (exact
-** division). Otherwise, to get a uniform projection into [0, n], we
-** first compute 'lim', the smallest Mersenne number not smaller than
-** 'n'. We then project 'ran' into the interval [0, lim].  If the result
-** is inside [0, n], we are done. Otherwise, we try with another 'ran',
-** until we have a result inside the interval.
-*/
-static lua_Unsigned project (lua_Unsigned ran, lua_Unsigned n,
-                             RanState *state) {
-  if ((n & (n + 1)) == 0)  /* is 'n + 1' a power of 2? */
-    return ran & n;  /* no bias */
-  else {
-    lua_Unsigned lim = n;
-    /* compute the smallest (2^b - 1) not smaller than 'n' */
-    lim |= (lim >> 1);
-    lim |= (lim >> 2);
-    lim |= (lim >> 4);
-    lim |= (lim >> 8);
-    lim |= (lim >> 16);
-#if (LUA_MAXUNSIGNED >> 31) >= 3
-    lim |= (lim >> 32);  /* integer type has more than 32 bits */
-#endif
-    lua_assert((lim & (lim + 1)) == 0  /* 'lim + 1' is a power of 2, */
-      && lim >= n  /* not smaller than 'n', */
-      && (lim >> 1) < n);  /* and it is the smallest one */
-    while ((ran &= lim) > n)  /* project 'ran' into [0..lim] */
-      ran = I2UInt(nextrand(state->s));  /* not inside [0..n]? try again */
-    return ran;
-  }
-}
-
-
 static int math_random (lua_State *L) {
   lua_Integer low, up;
-  lua_Unsigned p;
-  RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
-  Rand64 rv = nextrand(state->s);  /* next pseudo-random value */
+  double r = (double)l_rand() * (1.0 / ((double)L_RANDMAX + 1.0));
   switch (lua_gettop(L)) {  /* check number of arguments */
     case 0: {  /* no arguments */
-      lua_pushnumber(L, I2d(rv));  /* float between 0 and 1 */
+      lua_pushnumber(L, (lua_Number)r);  /* Number between 0 and 1 */
       return 1;
     }
     case 1: {  /* only upper limit */
       low = 1;
       up = luaL_checkinteger(L, 1);
-      if (up == 0) {  /* single 0 as argument? */
-        lua_pushinteger(L, I2UInt(rv));  /* full random integer */
-        return 1;
-      }
       break;
     }
     case 2: {  /* lower and upper limits */
@@ -582,73 +266,36 @@ static int math_random (lua_State *L) {
   }
   /* random integer in the interval [low, up] */
   luaL_argcheck(L, low <= up, 1, "interval is empty");
-  /* project random integer into the interval [0, up - low] */
-  p = project(I2UInt(rv), (lua_Unsigned)up - (lua_Unsigned)low, state);
-  lua_pushinteger(L, p + (lua_Unsigned)low);
+  luaL_argcheck(L, low >= 0 || up <= LUA_MAXINTEGER + low, 1,
+                   "interval too large");
+  r *= (double)(up - low) + 1.0;
+  lua_pushinteger(L, (lua_Integer)r + low);
   return 1;
 }
 
 
-static void setseed (lua_State *L, Rand64 *state,
-                     lua_Unsigned n1, lua_Unsigned n2) {
-  int i;
-  state[0] = Int2I(n1);
-  state[1] = Int2I(0xff);  /* avoid a zero state */
-  state[2] = Int2I(n2);
-  state[3] = Int2I(0);
-  for (i = 0; i < 16; i++)
-    nextrand(state);  /* discard initial values to "spread" seed */
-  lua_pushinteger(L, n1);
-  lua_pushinteger(L, n2);
-}
-
-
-/*
-** Set a "random" seed. To get some randomness, use the current time
-** and the address of 'L' (in case the machine does address space layout
-** randomization).
-*/
-static void randseed (lua_State *L, RanState *state) {
-  lua_Unsigned seed1 = (lua_Unsigned)time(NULL);
-  lua_Unsigned seed2 = (lua_Unsigned)(size_t)L;
-  setseed(L, state->s, seed1, seed2);
-}
-
-
 static int math_randomseed (lua_State *L) {
-  RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
-  if (lua_isnone(L, 1)) {
-    randseed(L, state);
+  l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
+  (void)l_rand(); /* discard first value to avoid undesirable correlations */
+  return 0;
+}
+
+
+static int math_type (lua_State *L) {
+  if (lua_type(L, 1) == LUA_TNUMBER) {
+      if (lua_isinteger(L, 1))
+        lua_pushliteral(L, "integer");
+      else
+        lua_pushliteral(L, "float");
   }
   else {
-    lua_Integer n1 = luaL_checkinteger(L, 1);
-    lua_Integer n2 = luaL_optinteger(L, 2, 0);
-    setseed(L, state->s, n1, n2);
+    luaL_checkany(L, 1);
+    lua_pushnil(L);
   }
-  return 2;  /* return seeds */
+  return 1;
 }
 
 
-static const luaL_Reg randfuncs[] = {
-  {"random", math_random},
-  {"randomseed", math_randomseed},
-  {NULL, NULL}
-};
-
-
-/*
-** Register the random functions and initialize their state.
-*/
-static void setrandfunc (lua_State *L) {
-  RanState *state = (RanState *)lua_newuserdatauv(L, sizeof(RanState), 0);
-  randseed(L, state);  /* initialize with a "random" seed */
-  lua_pop(L, 2);  /* remove pushed seeds */
-  luaL_setfuncs(L, randfuncs, 1);
-}
-
-/* }================================================================== */
-
-
 /*
 ** {==================================================================
 ** Deprecated functions (for compatibility only)
@@ -720,6 +367,8 @@ static const luaL_Reg mathlib[] = {
   {"min",   math_min},
   {"modf",   math_modf},
   {"rad",   math_rad},
+  {"random",     math_random},
+  {"randomseed", math_randomseed},
   {"sin",   math_sin},
   {"sqrt",  math_sqrt},
   {"tan",   math_tan},
@@ -735,8 +384,6 @@ static const luaL_Reg mathlib[] = {
   {"log10", math_log10},
 #endif
   /* placeholders */
-  {"random", NULL},
-  {"randomseed", NULL},
   {"pi", NULL},
   {"huge", NULL},
   {"maxinteger", NULL},
@@ -758,7 +405,6 @@ LUAMOD_API int luaopen_math (lua_State *L) {
   lua_setfield(L, -2, "maxinteger");
   lua_pushinteger(L, LUA_MININTEGER);
   lua_setfield(L, -2, "mininteger");
-  setrandfunc(L);
   return 1;
 }
 

lmem.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.c $
+** $Id: lmem.c,v 1.91.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -22,180 +22,79 @@
 #include "lstate.h"
 
 
-#if defined(EMERGENCYGCTESTS)
-/*
-** First allocation will fail whenever not building initial state.
-** (This fail will trigger 'tryagain' and a full GC cycle at every
-** allocation.)
-*/
-static void *firsttry (global_State *g, void *block, size_t os, size_t ns) {
-  if (completestate(g) && ns > 0)  /* frees never fail */
-    return NULL;  /* fail */
-  else  /* normal allocation */
-    return (*g->frealloc)(g->ud, block, os, ns);
-}
-#else
-#define firsttry(g,block,os,ns)    ((*g->frealloc)(g->ud, block, os, ns))
-#endif
-
-
-
-
 
 /*
 ** About the realloc function:
-** void *frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
+** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
 ** ('osize' is the old size, 'nsize' is the new size)
 **
-** - frealloc(ud, p, x, 0) frees the block 'p' and returns NULL.
-** Particularly, frealloc(ud, NULL, 0, 0) does nothing,
-** which is equivalent to free(NULL) in ISO C.
+** * frealloc(ud, NULL, x, s) creates a new block of size 's' (no
+** matter 'x').
 **
-** - frealloc(ud, NULL, x, s) creates a new block of size 's'
-** (no matter 'x'). Returns NULL if it cannot create the new block.
+** * frealloc(ud, p, x, 0) frees the block 'p'
+** (in this specific case, frealloc must return NULL);
+** particularly, frealloc(ud, NULL, 0, 0) does nothing
+** (which is equivalent to free(NULL) in ISO C)
 **
-** - otherwise, frealloc(ud, b, x, y) reallocates the block 'b' from
-** size 'x' to size 'y'. Returns NULL if it cannot reallocate the
-** block to the new size.
+** frealloc returns NULL if it cannot create or reallocate the area
+** (any reallocation to an equal or smaller size cannot fail!)
 */
 
 
 
-
-/*
-** {==================================================================
-** Functions to allocate/deallocate arrays for the Parser
-** ===================================================================
-*/
-
-/*
-** Minimum size for arrays during parsing, to avoid overhead of
-** reallocating to size 1, then 2, and then 4. All these arrays
-** will be reallocated to exact sizes or erased when parsing ends.
-*/
 #define MINSIZEARRAY	4
 
 
-void *luaM_growaux_ (lua_State *L, void *block, int nelems, int *psize,
-                     int size_elems, int limit, const char *what) {
+void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
+                     int limit, const char *what) {
   void *newblock;
-  int size = *psize;
-  if (nelems + 1 <= size)  /* does one extra element still fit? */
-    return block;  /* nothing to be done */
-  if (size >= limit / 2) {  /* cannot double it? */
-    if (l_unlikely(size >= limit))  /* cannot grow even a little? */
+  int newsize;
+  if (*size >= limit/2) {  /* cannot double it? */
+    if (*size >= limit)  /* cannot grow even a little? */
       luaG_runerror(L, "too many %s (limit is %d)", what, limit);
-    size = limit;  /* still have at least one free place */
+    newsize = limit;  /* still have at least one free place */
   }
   else {
-    size *= 2;
-    if (size < MINSIZEARRAY)
-      size = MINSIZEARRAY;  /* minimum size */
+    newsize = (*size)*2;
+    if (newsize < MINSIZEARRAY)
+      newsize = MINSIZEARRAY;  /* minimum size */
   }
-  lua_assert(nelems + 1 <= size && size <= limit);
-  /* 'limit' ensures that multiplication will not overflow */
-  newblock = luaM_saferealloc_(L, block, cast_sizet(*psize) * size_elems,
-                                         cast_sizet(size) * size_elems);
-  *psize = size;  /* update only when everything else is OK */
+  newblock = luaM_reallocv(L, block, *size, newsize, size_elems);
+  *size = newsize;  /* update only when everything else is OK */
   return newblock;
 }
 
 
-/*
-** In prototypes, the size of the array is also its number of
-** elements (to save memory). So, if it cannot shrink an array
-** to its number of elements, the only option is to raise an
-** error.
-*/
-void *luaM_shrinkvector_ (lua_State *L, void *block, int *size,
-                          int final_n, int size_elem) {
-  void *newblock;
-  size_t oldsize = cast_sizet((*size) * size_elem);
-  size_t newsize = cast_sizet(final_n * size_elem);
-  lua_assert(newsize <= oldsize);
-  newblock = luaM_saferealloc_(L, block, oldsize, newsize);
-  *size = final_n;
-  return newblock;
-}
-
-/* }================================================================== */
-
-
 l_noret luaM_toobig (lua_State *L) {
   luaG_runerror(L, "memory allocation error: block too big");
 }
 
 
-/*
-** Free memory
-*/
-void luaM_free_ (lua_State *L, void *block, size_t osize) {
-  global_State *g = G(L);
-  lua_assert((osize == 0) == (block == NULL));
-  (*g->frealloc)(g->ud, block, osize, 0);
-  g->GCdebt -= osize;
-}
-
 
 /*
-** In case of allocation fail, this function will do an emergency
-** collection to free some memory and then try the allocation again.
-** The GC should not be called while state is not fully built, as the
-** collector is not yet fully initialized. Also, it should not be called
-** when 'gcstopem' is true, because then the interpreter is in the
-** middle of a collection step.
-*/
-static void *tryagain (lua_State *L, void *block,
-                       size_t osize, size_t nsize) {
-  global_State *g = G(L);
-  if (completestate(g) && !g->gcstopem) {
-    luaC_fullgc(L, 1);  /* try to free some memory... */
-    return (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
-  }
-  else return NULL;  /* cannot free any memory without a full state */
-}
-
-
-/*
-** Generic allocation routine.
+** generic allocation routine.
 */
 void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
   void *newblock;
   global_State *g = G(L);
-  lua_assert((osize == 0) == (block == NULL));
-  newblock = firsttry(g, block, osize, nsize);
-  if (l_unlikely(newblock == NULL && nsize > 0)) {
-    newblock = tryagain(L, block, osize, nsize);
-    if (newblock == NULL)  /* still no memory? */
-      return NULL;  /* do not update 'GCdebt' */
+  size_t realosize = (block) ? osize : 0;
+  lua_assert((realosize == 0) == (block == NULL));
+#if defined(HARDMEMTESTS)
+  if (nsize > realosize && g->gcrunning)
+    luaC_fullgc(L, 1);  /* force a GC whenever possible */
+#endif
+  newblock = (*g->frealloc)(g->ud, block, osize, nsize);
+  if (newblock == NULL && nsize > 0) {
+    lua_assert(nsize > realosize);  /* cannot fail when shrinking a block */
+    if (g->version) {  /* is state fully built? */
+      luaC_fullgc(L, 1);  /* try to free some memory... */
+      newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
+    }
+    if (newblock == NULL)
+      luaD_throw(L, LUA_ERRMEM);
   }
   lua_assert((nsize == 0) == (newblock == NULL));
-  g->GCdebt = (g->GCdebt + nsize) - osize;
+  g->GCdebt = (g->GCdebt + nsize) - realosize;
   return newblock;
 }
 
-
-void *luaM_saferealloc_ (lua_State *L, void *block, size_t osize,
-                                                    size_t nsize) {
-  void *newblock = luaM_realloc_(L, block, osize, nsize);
-  if (l_unlikely(newblock == NULL && nsize > 0))  /* allocation failed? */
-    luaM_error(L);
-  return newblock;
-}
-
-
-void *luaM_malloc_ (lua_State *L, size_t size, int tag) {
-  if (size == 0)
-    return NULL;  /* that's all */
-  else {
-    global_State *g = G(L);
-    void *newblock = firsttry(g, NULL, tag, size);
-    if (l_unlikely(newblock == NULL)) {
-      newblock = tryagain(L, NULL, tag, size);
-      if (newblock == NULL)
-        luaM_error(L);
-    }
-    g->GCdebt += size;
-    return newblock;
-  }
-}

lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h $
+** $Id: lmem.h,v 1.43.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -14,13 +14,12 @@
 #include "lua.h"
 
 
-#define luaM_error(L)	luaD_throw(L, LUA_ERRMEM)
-
-
 /*
-** This macro tests whether it is safe to multiply 'n' by the size of
-** type 't' without overflows. Because 'e' is always constant, it avoids
-** the runtime division MAX_SIZET/(e).
+** This macro reallocs a vector 'b' from 'on' to 'n' elements, where
+** each element has size 'e'. In case of arithmetic overflow of the
+** product 'n'*'e', it raises an error (calling 'luaM_toobig'). Because
+** 'e' is always constant, it avoids the runtime division MAX_SIZET/(e).
+**
 ** (The macro is somewhat complex to avoid warnings:  The 'sizeof'
 ** comparison avoids a runtime comparison when overflow cannot occur.
 ** The compiler should be able to optimize the real test by itself, but
@@ -28,66 +27,43 @@
 ** false due to limited range of data type"; the +1 tricks the compiler,
 ** avoiding this warning but also this optimization.)
 */
-#define luaM_testsize(n,e)  \
-	(sizeof(n) >= sizeof(size_t) && cast_sizet((n)) + 1 > MAX_SIZET/(e))
-
-#define luaM_checksize(L,n,e)  \
-	(luaM_testsize(n,e) ? luaM_toobig(L) : cast_void(0))
-
-
-/*
-** Computes the minimum between 'n' and 'MAX_SIZET/sizeof(t)', so that
-** the result is not larger than 'n' and cannot overflow a 'size_t'
-** when multiplied by the size of type 't'. (Assumes that 'n' is an
-** 'int' or 'unsigned int' and that 'int' is not larger than 'size_t'.)
-*/
-#define luaM_limitN(n,t)  \
-  ((cast_sizet(n) <= MAX_SIZET/sizeof(t)) ? (n) :  \
-     cast_uint((MAX_SIZET/sizeof(t))))
-
+#define luaM_reallocv(L,b,on,n,e) \
+  (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \
+      ? luaM_toobig(L) : cast_void(0)) , \
+   luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
 
 /*
 ** Arrays of chars do not need any test
 */
 #define luaM_reallocvchar(L,b,on,n)  \
-  cast_charp(luaM_saferealloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
+    cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
 
-#define luaM_freemem(L, b, s)	luaM_free_(L, (b), (s))
-#define luaM_free(L, b)		luaM_free_(L, (b), sizeof(*(b)))
-#define luaM_freearray(L, b, n)   luaM_free_(L, (b), (n)*sizeof(*(b)))
+#define luaM_freemem(L, b, s)	luaM_realloc_(L, (b), (s), 0)
+#define luaM_free(L, b)		luaM_realloc_(L, (b), sizeof(*(b)), 0)
+#define luaM_freearray(L, b, n)   luaM_realloc_(L, (b), (n)*sizeof(*(b)), 0)
 
-#define luaM_new(L,t)		cast(t*, luaM_malloc_(L, sizeof(t), 0))
-#define luaM_newvector(L,n,t)	cast(t*, luaM_malloc_(L, (n)*sizeof(t), 0))
-#define luaM_newvectorchecked(L,n,t) \
-  (luaM_checksize(L,n,sizeof(t)), luaM_newvector(L,n,t))
+#define luaM_malloc(L,s)	luaM_realloc_(L, NULL, 0, (s))
+#define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))
+#define luaM_newvector(L,n,t) \
+		cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
 
-#define luaM_newobject(L,tag,s)	luaM_malloc_(L, (s), tag)
+#define luaM_newobject(L,tag,s)	luaM_realloc_(L, NULL, tag, (s))
 
 #define luaM_growvector(L,v,nelems,size,t,limit,e) \
-	((v)=cast(t *, luaM_growaux_(L,v,nelems,&(size),sizeof(t), \
-                         luaM_limitN(limit,t),e)))
+          if ((nelems)+1 > (size)) \
+            ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
 
 #define luaM_reallocvector(L, v,oldn,n,t) \
-   (cast(t *, luaM_realloc_(L, v, cast_sizet(oldn) * sizeof(t), \
-                                  cast_sizet(n) * sizeof(t))))
-
-#define luaM_shrinkvector(L,v,size,fs,t) \
-   ((v)=cast(t *, luaM_shrinkvector_(L, v, &(size), fs, sizeof(t))))
+   ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
 
 LUAI_FUNC l_noret luaM_toobig (lua_State *L);
 
 /* not to be called directly */
 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
                                                           size_t size);
-LUAI_FUNC void *luaM_saferealloc_ (lua_State *L, void *block, size_t oldsize,
-                                                              size_t size);
-LUAI_FUNC void luaM_free_ (lua_State *L, void *block, size_t osize);
-LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int nelems,
-                               int *size, int size_elem, int limit,
+LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
+                               size_t size_elem, int limit,
                                const char *what);
-LUAI_FUNC void *luaM_shrinkvector_ (lua_State *L, void *block, int *nelem,
-                                    int final_n, int size_elem);
-LUAI_FUNC void *luaM_malloc_ (lua_State *L, size_t size, int tag);
 
 #endif
 

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c $
+** $Id: loadlib.c,v 1.130.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -56,10 +56,10 @@
 
 
 /*
-** key for table in the registry that keeps handles
+** unique key for table in the registry that keeps handles
 ** for all loaded C libraries
 */
-static const char *const CLIBS = "_CLIBS";
+static const int CLIBS = 0;
 
 #define LIB_FAIL	"open"
 
@@ -67,13 +67,6 @@ static const char *const CLIBS = "_CLIBS";
 #define setprogdir(L)           ((void)0)
 
 
-/*
-** Special type equivalent to '(void*)' for functions in gcc
-** (to suppress warnings when converting function pointers)
-*/
-typedef void (*voidf)(void);
-
-
 /*
 ** system-dependent functions
 */
@@ -132,16 +125,14 @@ static void lsys_unloadlib (void *lib) {
 
 static void *lsys_load (lua_State *L, const char *path, int seeglb) {
   void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
-  if (l_unlikely(lib == NULL))
-    lua_pushstring(L, dlerror());
+  if (lib == NULL) lua_pushstring(L, dlerror());
   return lib;
 }
 
 
 static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
   lua_CFunction f = cast_func(dlsym(lib, sym));
-  if (l_unlikely(f == NULL))
-    lua_pushstring(L, dlerror());
+  if (f == NULL) lua_pushstring(L, dlerror());
   return f;
 }
 
@@ -215,7 +206,7 @@ static void *lsys_load (lua_State *L, const char *path, int seeglb) {
 
 
 static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
-  lua_CFunction f = (lua_CFunction)(voidf)GetProcAddress((HMODULE)lib, sym);
+  lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
   if (f == NULL) pusherror(L);
   return f;
 }
@@ -278,6 +269,8 @@ static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
 #endif
 
 
+#define AUXMARK         "\1"	/* auxiliary mark */
+
 
 /*
 ** return registry.LUA_NOENV as a boolean
@@ -297,33 +290,22 @@ static int noenv (lua_State *L) {
 static void setpath (lua_State *L, const char *fieldname,
                                    const char *envname,
                                    const char *dft) {
-  const char *dftmark;
   const char *nver = lua_pushfstring(L, "%s%s", envname, LUA_VERSUFFIX);
-  const char *path = getenv(nver);  /* try versioned name */
-  if (path == NULL)  /* no versioned environment variable? */
+  const char *path = getenv(nver);  /* use versioned name */
+  if (path == NULL)  /* no environment variable? */
     path = getenv(envname);  /* try unversioned name */
   if (path == NULL || noenv(L))  /* no environment variable? */
     lua_pushstring(L, dft);  /* use default */
-  else if ((dftmark = strstr(path, LUA_PATH_SEP LUA_PATH_SEP)) == NULL)
-    lua_pushstring(L, path);  /* nothing to change */
-  else {  /* path contains a ";;": insert default path in its place */
-    size_t len = strlen(path);
-    luaL_Buffer b;
-    luaL_buffinit(L, &b);
-    if (path < dftmark) {  /* is there a prefix before ';;'? */
-      luaL_addlstring(&b, path, dftmark - path);  /* add it */
-      luaL_addchar(&b, *LUA_PATH_SEP);
-    }
-    luaL_addstring(&b, dft);  /* add default */
-    if (dftmark < path + len - 2) {  /* is there a suffix after ';;'? */
-      luaL_addchar(&b, *LUA_PATH_SEP);
-      luaL_addlstring(&b, dftmark + 2, (path + len - 2) - dftmark);
-    }
-    luaL_pushresult(&b);
+  else {
+    /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
+    path = luaL_gsub(L, path, LUA_PATH_SEP LUA_PATH_SEP,
+                              LUA_PATH_SEP AUXMARK LUA_PATH_SEP);
+    luaL_gsub(L, path, AUXMARK, dft);
+    lua_remove(L, -2); /* remove result from 1st 'gsub' */
   }
   setprogdir(L);
   lua_setfield(L, -3, fieldname);  /* package[fieldname] = path value */
-  lua_pop(L, 1);  /* pop versioned variable name ('nver') */
+  lua_pop(L, 1);  /* pop versioned variable name */
 }
 
 /* }================================================================== */
@@ -334,7 +316,7 @@ static void setpath (lua_State *L, const char *fieldname,
 */
 static void *checkclib (lua_State *L, const char *path) {
   void *plib;
-  lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
+  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
   lua_getfield(L, -1, path);
   plib = lua_touserdata(L, -1);  /* plib = CLIBS[path] */
   lua_pop(L, 2);  /* pop CLIBS table and 'plib' */
@@ -347,7 +329,7 @@ static void *checkclib (lua_State *L, const char *path) {
 ** registry.CLIBS[#CLIBS + 1] = plib  -- also keep a list of all libraries
 */
 static void addtoclib (lua_State *L, const char *path, void *plib) {
-  lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
+  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
   lua_pushlightuserdata(L, plib);
   lua_pushvalue(L, -1);
   lua_setfield(L, -3, path);  /* CLIBS[path] = plib */
@@ -412,13 +394,13 @@ static int ll_loadlib (lua_State *L) {
   const char *path = luaL_checkstring(L, 1);
   const char *init = luaL_checkstring(L, 2);
   int stat = lookforfunc(L, path, init);
-  if (l_likely(stat == 0))  /* no errors? */
+  if (stat == 0)  /* no errors? */
     return 1;  /* return the loaded function */
   else {  /* error; error message is on stack top */
-    luaL_pushfail(L);
+    lua_pushnil(L);
     lua_insert(L, -2);
     lua_pushstring(L, (stat == ERRLIB) ?  LIB_FAIL : "init");
-    return 3;  /* return fail, error message, and where */
+    return 3;  /* return nil, error message, and where */
   }
 }
 
@@ -439,42 +421,14 @@ static int readable (const char *filename) {
 }
 
 
-/*
-** Get the next name in '*path' = 'name1;name2;name3;...', changing
-** the ending ';' to '\0' to create a zero-terminated string. Return
-** NULL when list ends.
-*/
-static const char *getnextfilename (char **path, char *end) {
-  char *sep;
-  char *name = *path;
-  if (name == end)
-    return NULL;  /* no more names */
-  else if (*name == '\0') {  /* from previous iteration? */
-    *name = *LUA_PATH_SEP;  /* restore separator */
-    name++;  /* skip it */
-  }
-  sep = strchr(name, *LUA_PATH_SEP);  /* find next separator */
-  if (sep == NULL)  /* separator not found? */
-    sep = end;  /* name goes until the end */
-  *sep = '\0';  /* finish file name */
-  *path = sep;  /* will start next search from here */
-  return name;
-}
-
-
-/*
-** Given a path such as ";blabla.so;blublu.so", pushes the string
-**
-** no file 'blabla.so'
-**	no file 'blublu.so'
-*/
-static void pusherrornotfound (lua_State *L, const char *path) {
-  luaL_Buffer b;
-  luaL_buffinit(L, &b);
-  luaL_addstring(&b, "no file '");
-  luaL_addgsub(&b, path, LUA_PATH_SEP, "'\n\tno file '");
-  luaL_addstring(&b, "'");
-  luaL_pushresult(&b);
+static const char *pushnexttemplate (lua_State *L, const char *path) {
+  const char *l;
+  while (*path == *LUA_PATH_SEP) path++;  /* skip separators */
+  if (*path == '\0') return NULL;  /* no more templates */
+  l = strchr(path, *LUA_PATH_SEP);  /* find next separator */
+  if (l == NULL) l = path + strlen(path);
+  lua_pushlstring(L, path, l - path);  /* template */
+  return l;
 }
 
 
@@ -482,25 +436,21 @@ static const char *searchpath (lua_State *L, const char *name,
                                              const char *path,
                                              const char *sep,
                                              const char *dirsep) {
-  luaL_Buffer buff;
-  char *pathname;  /* path with name inserted */
-  char *endpathname;  /* its end */
-  const char *filename;
-  /* separator is non-empty and appears in 'name'? */
-  if (*sep != '\0' && strchr(name, *sep) != NULL)
+  luaL_Buffer msg;  /* to build error message */
+  luaL_buffinit(L, &msg);
+  if (*sep != '\0')  /* non-empty separator? */
     name = luaL_gsub(L, name, sep, dirsep);  /* replace it by 'dirsep' */
-  luaL_buffinit(L, &buff);
-  /* add path to the buffer, replacing marks ('?') with the file name */
-  luaL_addgsub(&buff, path, LUA_PATH_MARK, name);
-  luaL_addchar(&buff, '\0');
-  pathname = luaL_buffaddr(&buff);  /* writable list of file names */
-  endpathname = pathname + luaL_bufflen(&buff) - 1;
-  while ((filename = getnextfilename(&pathname, endpathname)) != NULL) {
+  while ((path = pushnexttemplate(L, path)) != NULL) {
+    const char *filename = luaL_gsub(L, lua_tostring(L, -1),
+                                     LUA_PATH_MARK, name);
+    lua_remove(L, -2);  /* remove path template */
     if (readable(filename))  /* does file exist and is readable? */
-      return lua_pushstring(L, filename);  /* save and return name */
+      return filename;  /* return that file name */
+    lua_pushfstring(L, "\n\tno file '%s'", filename);
+    lua_remove(L, -2);  /* remove file name */
+    luaL_addvalue(&msg);  /* concatenate error msg. entry */
   }
-  luaL_pushresult(&buff);  /* push path to create error message */
-  pusherrornotfound(L, lua_tostring(L, -1));  /* create error message */
+  luaL_pushresult(&msg);  /* create error message */
   return NULL;  /* not found */
 }
 
@@ -512,9 +462,9 @@ static int ll_searchpath (lua_State *L) {
                                 luaL_optstring(L, 4, LUA_DIRSEP));
   if (f != NULL) return 1;
   else {  /* error message is on top of the stack */
-    luaL_pushfail(L);
+    lua_pushnil(L);
     lua_insert(L, -2);
-    return 2;  /* return fail + error message */
+    return 2;  /* return nil + error message */
   }
 }
 
@@ -525,14 +475,14 @@ static const char *findfile (lua_State *L, const char *name,
   const char *path;
   lua_getfield(L, lua_upvalueindex(1), pname);
   path = lua_tostring(L, -1);
-  if (l_unlikely(path == NULL))
+  if (path == NULL)
     luaL_error(L, "'package.%s' must be a string", pname);
   return searchpath(L, name, path, ".", dirsep);
 }
 
 
 static int checkload (lua_State *L, int stat, const char *filename) {
-  if (l_likely(stat)) {  /* module loaded successfully? */
+  if (stat) {  /* module loaded successfully? */
     lua_pushstring(L, filename);  /* will be 2nd argument to module */
     return 2;  /* return open function and file name */
   }
@@ -598,7 +548,7 @@ static int searcher_Croot (lua_State *L) {
     if (stat != ERRFUNC)
       return checkload(L, 0, filename);  /* real error */
     else {  /* open function not found */
-      lua_pushfstring(L, "no module '%s' in file '%s'", name, filename);
+      lua_pushfstring(L, "\n\tno module '%s' in file '%s'", name, filename);
       return 1;
     }
   }
@@ -610,31 +560,23 @@ static int searcher_Croot (lua_State *L) {
 static int searcher_preload (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
   lua_getfield(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
-  if (lua_getfield(L, -1, name) == LUA_TNIL) {  /* not found? */
-    lua_pushfstring(L, "no field package.preload['%s']", name);
-    return 1;
-  }
-  else {
-    lua_pushliteral(L, ":preload:");
-    return 2;
-  }
+  if (lua_getfield(L, -1, name) == LUA_TNIL)  /* not found? */
+    lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
+  return 1;
 }
 
 
 static void findloader (lua_State *L, const char *name) {
   int i;
   luaL_Buffer msg;  /* to build error message */
-  /* push 'package.searchers' to index 3 in the stack */
-  if (l_unlikely(lua_getfield(L, lua_upvalueindex(1), "searchers")
-                 != LUA_TTABLE))
-    luaL_error(L, "'package.searchers' must be a table");
   luaL_buffinit(L, &msg);
+  /* push 'package.searchers' to index 3 in the stack */
+  if (lua_getfield(L, lua_upvalueindex(1), "searchers") != LUA_TTABLE)
+    luaL_error(L, "'package.searchers' must be a table");
   /*  iterate over available searchers to find a loader */
   for (i = 1; ; i++) {
-    luaL_addstring(&msg, "\n\t");  /* error-message prefix */
-    if (l_unlikely(lua_rawgeti(L, 3, i) == LUA_TNIL)) {  /* no more searchers? */
+    if (lua_rawgeti(L, 3, i) == LUA_TNIL) {  /* no more searchers? */
       lua_pop(L, 1);  /* remove nil */
-      luaL_buffsub(&msg, 2);  /* remove prefix */
       luaL_pushresult(&msg);  /* create error message */
       luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
     }
@@ -646,10 +588,8 @@ static void findloader (lua_State *L, const char *name) {
       lua_pop(L, 1);  /* remove extra return */
       luaL_addvalue(&msg);  /* concatenate error message */
     }
-    else {  /* no error message */
+    else
       lua_pop(L, 2);  /* remove both returns */
-      luaL_buffsub(&msg, 2);  /* remove prefix */
-    }
   }
 }
 
@@ -664,33 +604,113 @@ static int ll_require (lua_State *L) {
   /* else must load package */
   lua_pop(L, 1);  /* remove 'getfield' result */
   findloader(L, name);
-  lua_rotate(L, -2, 1);  /* function <-> loader data */
-  lua_pushvalue(L, 1);  /* name is 1st argument to module loader */
-  lua_pushvalue(L, -3);  /* loader data is 2nd argument */
-  /* stack: ...; loader data; loader function; mod. name; loader data */
+  lua_pushstring(L, name);  /* pass name as argument to module loader */
+  lua_insert(L, -2);  /* name is 1st argument (before search data) */
   lua_call(L, 2, 1);  /* run loader to load module */
-  /* stack: ...; loader data; result from loader */
   if (!lua_isnil(L, -1))  /* non-nil return? */
     lua_setfield(L, 2, name);  /* LOADED[name] = returned value */
-  else
-    lua_pop(L, 1);  /* pop nil */
   if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
     lua_pushboolean(L, 1);  /* use true as result */
-    lua_copy(L, -1, -2);  /* replace loader result */
+    lua_pushvalue(L, -1);  /* extra copy to be returned */
     lua_setfield(L, 2, name);  /* LOADED[name] = true */
   }
-  lua_rotate(L, -2, 1);  /* loader data <-> module result  */
-  return 2;  /* return module result and loader data */
+  return 1;
 }
 
 /* }====================================================== */
 
 
 
+/*
+** {======================================================
+** 'module' function
+** =======================================================
+*/
+#if defined(LUA_COMPAT_MODULE)
+
+/*
+** changes the environment variable of calling function
+*/
+static void set_env (lua_State *L) {
+  lua_Debug ar;
+  if (lua_getstack(L, 1, &ar) == 0 ||
+      lua_getinfo(L, "f", &ar) == 0 ||  /* get calling function */
+      lua_iscfunction(L, -1))
+    luaL_error(L, "'module' not called from a Lua function");
+  lua_pushvalue(L, -2);  /* copy new environment table to top */
+  lua_setupvalue(L, -2, 1);
+  lua_pop(L, 1);  /* remove function */
+}
+
+
+static void dooptions (lua_State *L, int n) {
+  int i;
+  for (i = 2; i <= n; i++) {
+    if (lua_isfunction(L, i)) {  /* avoid 'calling' extra info. */
+      lua_pushvalue(L, i);  /* get option (a function) */
+      lua_pushvalue(L, -2);  /* module */
+      lua_call(L, 1, 0);
+    }
+  }
+}
+
+
+static void modinit (lua_State *L, const char *modname) {
+  const char *dot;
+  lua_pushvalue(L, -1);
+  lua_setfield(L, -2, "_M");  /* module._M = module */
+  lua_pushstring(L, modname);
+  lua_setfield(L, -2, "_NAME");
+  dot = strrchr(modname, '.');  /* look for last dot in module name */
+  if (dot == NULL) dot = modname;
+  else dot++;
+  /* set _PACKAGE as package name (full module name minus last part) */
+  lua_pushlstring(L, modname, dot - modname);
+  lua_setfield(L, -2, "_PACKAGE");
+}
+
+
+static int ll_module (lua_State *L) {
+  const char *modname = luaL_checkstring(L, 1);
+  int lastarg = lua_gettop(L);  /* last parameter */
+  luaL_pushmodule(L, modname, 1);  /* get/create module table */
+  /* check whether table already has a _NAME field */
+  if (lua_getfield(L, -1, "_NAME") != LUA_TNIL)
+    lua_pop(L, 1);  /* table is an initialized module */
+  else {  /* no; initialize it */
+    lua_pop(L, 1);
+    modinit(L, modname);
+  }
+  lua_pushvalue(L, -1);
+  set_env(L);
+  dooptions(L, lastarg);
+  return 1;
+}
+
+
+static int ll_seeall (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (!lua_getmetatable(L, 1)) {
+    lua_createtable(L, 0, 1); /* create new metatable */
+    lua_pushvalue(L, -1);
+    lua_setmetatable(L, 1);
+  }
+  lua_pushglobaltable(L);
+  lua_setfield(L, -2, "__index");  /* mt.__index = _G */
+  return 0;
+}
+
+#endif
+/* }====================================================== */
+
+
 
 static const luaL_Reg pk_funcs[] = {
   {"loadlib", ll_loadlib},
   {"searchpath", ll_searchpath},
+#if defined(LUA_COMPAT_MODULE)
+  {"seeall", ll_seeall},
+#endif
   /* placeholders */
   {"preload", NULL},
   {"cpath", NULL},
@@ -702,6 +722,9 @@ static const luaL_Reg pk_funcs[] = {
 
 
 static const luaL_Reg ll_funcs[] = {
+#if defined(LUA_COMPAT_MODULE)
+  {"module", ll_module},
+#endif
   {"require", ll_require},
   {NULL, NULL}
 };
@@ -719,6 +742,10 @@ static void createsearcherstable (lua_State *L) {
     lua_pushcclosure(L, searchers[i], 1);
     lua_rawseti(L, -2, i+1);
   }
+#if defined(LUA_COMPAT_LOADERS)
+  lua_pushvalue(L, -1);  /* make a copy of 'searchers' table */
+  lua_setfield(L, -3, "loaders");  /* put it in field 'loaders' */
+#endif
   lua_setfield(L, -2, "searchers");  /* put it in field 'searchers' */
 }
 
@@ -728,11 +755,12 @@ static void createsearcherstable (lua_State *L) {
 ** setting a finalizer to close all libraries when closing state.
 */
 static void createclibstable (lua_State *L) {
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);  /* create CLIBS table */
+  lua_newtable(L);  /* create CLIBS table */
   lua_createtable(L, 0, 1);  /* create metatable for CLIBS */
   lua_pushcfunction(L, gctm);
   lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
   lua_setmetatable(L, -2);
+  lua_rawsetp(L, LUA_REGISTRYINDEX, &CLIBS);  /* set CLIBS table in registry */
 }
 
 

lobject.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c $
+** $Id: lobject.c,v 2.113.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -29,6 +29,36 @@
 #include "lvm.h"
 
 
+
+LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT};
+
+
+/*
+** converts an integer to a "floating point byte", represented as
+** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
+** eeeee != 0 and (xxx) otherwise.
+*/
+int luaO_int2fb (unsigned int x) {
+  int e = 0;  /* exponent */
+  if (x < 8) return x;
+  while (x >= (8 << 4)) {  /* coarse steps */
+    x = (x + 0xf) >> 4;  /* x = ceil(x / 16) */
+    e += 4;
+  }
+  while (x >= (8 << 1)) {  /* fine steps */
+    x = (x + 1) >> 1;  /* x = ceil(x / 2) */
+    e++;
+  }
+  return ((e+1) << 3) | (cast_int(x) - 8);
+}
+
+
+/* converts back */
+int luaO_fb2int (int x) {
+  return (x < 8) ? x : ((x & 7) + 8) << ((x >> 3) - 1);
+}
+
+
 /*
 ** Computes ceil(log2(x))
 */
@@ -57,7 +87,7 @@ static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
     case LUA_OPSUB:return intop(-, v1, v2);
     case LUA_OPMUL:return intop(*, v1, v2);
     case LUA_OPMOD: return luaV_mod(L, v1, v2);
-    case LUA_OPIDIV: return luaV_idiv(L, v1, v2);
+    case LUA_OPIDIV: return luaV_div(L, v1, v2);
     case LUA_OPBAND: return intop(&, v1, v2);
     case LUA_OPBOR: return intop(|, v1, v2);
     case LUA_OPBXOR: return intop(^, v1, v2);
@@ -80,55 +110,53 @@ static lua_Number numarith (lua_State *L, int op, lua_Number v1,
     case LUA_OPPOW: return luai_numpow(L, v1, v2);
     case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
     case LUA_OPUNM: return luai_numunm(L, v1);
-    case LUA_OPMOD: return luaV_modf(L, v1, v2);
+    case LUA_OPMOD: {
+      lua_Number m;
+      luai_nummod(L, v1, v2, m);
+      return m;
+    }
     default: lua_assert(0); return 0;
   }
 }
 
 
-int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2,
-                   TValue *res) {
+void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+                 TValue *res) {
   switch (op) {
     case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
     case LUA_OPSHL: case LUA_OPSHR:
     case LUA_OPBNOT: {  /* operate only on integers */
       lua_Integer i1; lua_Integer i2;
-      if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) {
+      if (tointeger(p1, &i1) && tointeger(p2, &i2)) {
         setivalue(res, intarith(L, op, i1, i2));
-        return 1;
+        return;
       }
-      else return 0;  /* fail */
+      else break;  /* go to the end */
     }
     case LUA_OPDIV: case LUA_OPPOW: {  /* operate only on floats */
       lua_Number n1; lua_Number n2;
-      if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+      if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
         setfltvalue(res, numarith(L, op, n1, n2));
-        return 1;
+        return;
       }
-      else return 0;  /* fail */
+      else break;  /* go to the end */
     }
     default: {  /* other operations */
       lua_Number n1; lua_Number n2;
       if (ttisinteger(p1) && ttisinteger(p2)) {
         setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
-        return 1;
+        return;
       }
-      else if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
+      else if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
         setfltvalue(res, numarith(L, op, n1, n2));
-        return 1;
+        return;
       }
-      else return 0;  /* fail */
+      else break;  /* go to the end */
     }
   }
-}
-
-
-void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
-                 StkId res) {
-  if (!luaO_rawarith(L, op, p1, p2, s2v(res))) {
-    /* could not perform raw operation; try metamethod */
-    luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
-  }
+  /* could not perform raw operation; try metamethod */
+  lua_assert(L != NULL);  /* should not fail when folding (compile time) */
+  luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
 }
 
 
@@ -159,7 +187,7 @@ static int isneg (const char **s) {
 #define MAXSIGDIG	30
 
 /*
-** convert a hexadecimal numeric string to a number, following
+** convert an hexadecimal numeric string to a number, following
 ** C99 specification for 'strtod'
 */
 static lua_Number lua_strx2number (const char *s, char **endptr) {
@@ -170,9 +198,9 @@ static lua_Number lua_strx2number (const char *s, char **endptr) {
   int e = 0;  /* exponent correction */
   int neg;  /* 1 if number is negative */
   int hasdot = 0;  /* true after seen a dot */
-  *endptr = cast_charp(s);  /* nothing is valid yet */
+  *endptr = cast(char *, s);  /* nothing is valid yet */
   while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
-  neg = isneg(&s);  /* check sign */
+  neg = isneg(&s);  /* check signal */
   if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X')))  /* check '0x' */
     return 0.0;  /* invalid format (no '0x') */
   for (s += 2; ; s++) {  /* skip '0x' and read numeral */
@@ -192,20 +220,20 @@ static lua_Number lua_strx2number (const char *s, char **endptr) {
   }
   if (nosigdig + sigdig == 0)  /* no digits? */
     return 0.0;  /* invalid format */
-  *endptr = cast_charp(s);  /* valid up to here */
+  *endptr = cast(char *, s);  /* valid up to here */
   e *= 4;  /* each digit multiplies/divides value by 2^4 */
   if (*s == 'p' || *s == 'P') {  /* exponent part? */
     int exp1 = 0;  /* exponent value */
-    int neg1;  /* exponent sign */
+    int neg1;  /* exponent signal */
     s++;  /* skip 'p' */
-    neg1 = isneg(&s);  /* sign */
+    neg1 = isneg(&s);  /* signal */
     if (!lisdigit(cast_uchar(*s)))
       return 0.0;  /* invalid; must have at least one digit */
     while (lisdigit(cast_uchar(*s)))  /* read exponent */
       exp1 = exp1 * 10 + *(s++) - '0';
     if (neg1) exp1 = -exp1;
     e += exp1;
-    *endptr = cast_charp(s);  /* valid up to here */
+    *endptr = cast(char *, s);  /* valid up to here */
   }
   if (neg) r = -r;
   return l_mathop(ldexp)(r, e);
@@ -215,42 +243,37 @@ static lua_Number lua_strx2number (const char *s, char **endptr) {
 /* }====================================================== */
 
 
-/* maximum length of a numeral to be converted to a number */
+/* maximum length of a numeral */
 #if !defined (L_MAXLENNUM)
 #define L_MAXLENNUM	200
 #endif
 
-/*
-** Convert string 's' to a Lua number (put in 'result'). Return NULL on
-** fail or the address of the ending '\0' on success. ('mode' == 'x')
-** means a hexadecimal numeral.
-*/
 static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
   char *endptr;
   *result = (mode == 'x') ? lua_strx2number(s, &endptr)  /* try to convert */
                           : lua_str2number(s, &endptr);
   if (endptr == s) return NULL;  /* nothing recognized? */
   while (lisspace(cast_uchar(*endptr))) endptr++;  /* skip trailing spaces */
-  return (*endptr == '\0') ? endptr : NULL;  /* OK iff no trailing chars */
+  return (*endptr == '\0') ? endptr : NULL;  /* OK if no trailing characters */
 }
 
 
 /*
-** Convert string 's' to a Lua number (put in 'result') handling the
-** current locale.
+** Convert string 's' to a Lua number (put in 'result'). Return NULL
+** on fail or the address of the ending '\0' on success.
+** 'pmode' points to (and 'mode' contains) special things in the string:
+** - 'x'/'X' means an hexadecimal numeral
+** - 'n'/'N' means 'inf' or 'nan' (which should be rejected)
+** - '.' just optimizes the search for the common case (nothing special)
 ** This function accepts both the current locale or a dot as the radix
 ** mark. If the conversion fails, it may mean number has a dot but
 ** locale accepts something else. In that case, the code copies 's'
 ** to a buffer (because 's' is read-only), changes the dot to the
 ** current locale radix mark, and tries to convert again.
-** The variable 'mode' checks for special characters in the string:
-** - 'n' means 'inf' or 'nan' (which should be rejected)
-** - 'x' means a hexadecimal numeral
-** - '.' just optimizes the search for the common case (no special chars)
 */
 static const char *l_str2d (const char *s, lua_Number *result) {
   const char *endptr;
-  const char *pmode = strpbrk(s, ".xXnN");  /* look for special chars */
+  const char *pmode = strpbrk(s, ".xXnN");
   int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
   if (mode == 'n')  /* reject 'inf' and 'nan' */
     return NULL;
@@ -258,7 +281,7 @@ static const char *l_str2d (const char *s, lua_Number *result) {
   if (endptr == NULL) {  /* failed? may be a different locale */
     char buff[L_MAXLENNUM + 1];
     const char *pdot = strchr(s, '.');
-    if (pdot == NULL || strlen(s) > L_MAXLENNUM)
+    if (strlen(s) > L_MAXLENNUM || pdot == NULL)
       return NULL;  /* string too long or no dot; fail */
     strcpy(buff, s);  /* copy string to buffer */
     buff[pdot - s] = lua_getlocaledecpoint();  /* correct decimal point */
@@ -322,204 +345,109 @@ size_t luaO_str2num (const char *s, TValue *o) {
 
 int luaO_utf8esc (char *buff, unsigned long x) {
   int n = 1;  /* number of bytes put in buffer (backwards) */
-  lua_assert(x <= 0x7FFFFFFFu);
+  lua_assert(x <= 0x10FFFF);
   if (x < 0x80)  /* ascii? */
-    buff[UTF8BUFFSZ - 1] = cast_char(x);
+    buff[UTF8BUFFSZ - 1] = cast(char, x);
   else {  /* need continuation bytes */
     unsigned int mfb = 0x3f;  /* maximum that fits in first byte */
     do {  /* add continuation bytes */
-      buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f));
+      buff[UTF8BUFFSZ - (n++)] = cast(char, 0x80 | (x & 0x3f));
       x >>= 6;  /* remove added bits */
       mfb >>= 1;  /* now there is one less bit available in first byte */
     } while (x > mfb);  /* still needs continuation byte? */
-    buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x);  /* add first byte */
+    buff[UTF8BUFFSZ - n] = cast(char, (~mfb << 1) | x);  /* add first byte */
   }
   return n;
 }
 
 
-/*
-** Maximum length of the conversion of a number to a string. Must be
-** enough to accommodate both LUA_INTEGER_FMT and LUA_NUMBER_FMT.
-** (For a long long int, this is 19 digits plus a sign and a final '\0',
-** adding to 21. For a long double, it can go to a sign, 33 digits,
-** the dot, an exponent letter, an exponent sign, 5 exponent digits,
-** and a final '\0', adding to 43.)
-*/
-#define MAXNUMBER2STR	44
+/* maximum length of the conversion of a number to a string */
+#define MAXNUMBER2STR	50
 
 
 /*
-** Convert a number object to a string, adding it to a buffer
+** Convert a number object to a string
 */
-static int tostringbuff (TValue *obj, char *buff) {
-  int len;
+void luaO_tostring (lua_State *L, StkId obj) {
+  char buff[MAXNUMBER2STR];
+  size_t len;
   lua_assert(ttisnumber(obj));
   if (ttisinteger(obj))
-    len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
+    len = lua_integer2str(buff, sizeof(buff), ivalue(obj));
   else {
-    len = lua_number2str(buff, MAXNUMBER2STR, fltvalue(obj));
+    len = lua_number2str(buff, sizeof(buff), fltvalue(obj));
+#if !defined(LUA_COMPAT_FLOATSTRING)
     if (buff[strspn(buff, "-0123456789")] == '\0') {  /* looks like an int? */
       buff[len++] = lua_getlocaledecpoint();
       buff[len++] = '0';  /* adds '.0' to result */
     }
+#endif
   }
-  return len;
+  setsvalue2s(L, obj, luaS_newlstr(L, buff, len));
 }
 
 
-/*
-** Convert a number object to a Lua string, replacing the value at 'obj'
-*/
-void luaO_tostring (lua_State *L, TValue *obj) {
-  char buff[MAXNUMBER2STR];
-  int len = tostringbuff(obj, buff);
-  setsvalue(L, obj, luaS_newlstr(L, buff, len));
-}
-
-
-
-
-/*
-** {==================================================================
-** 'luaO_pushvfstring'
-** ===================================================================
-*/
-
-/* size for buffer space used by 'luaO_pushvfstring' */
-#define BUFVFS		200
-
-/* buffer used by 'luaO_pushvfstring' */
-typedef struct BuffFS {
-  lua_State *L;
-  int pushed;  /* number of string pieces already on the stack */
-  int blen;  /* length of partial string in 'space' */
-  char space[BUFVFS];  /* holds last part of the result */
-} BuffFS;
-
-
-/*
-** Push given string to the stack, as part of the buffer, and
-** join the partial strings in the stack into one.
-*/
-static void pushstr (BuffFS *buff, const char *str, size_t l) {
-  lua_State *L = buff->L;
+static void pushstr (lua_State *L, const char *str, size_t l) {
   setsvalue2s(L, L->top, luaS_newlstr(L, str, l));
-  L->top++;  /* may use one extra slot */
-  buff->pushed++;
-  luaV_concat(L, buff->pushed);  /* join partial results into one */
-  buff->pushed = 1;
+  luaD_inctop(L);
 }
 
 
 /*
-** empty the buffer space into the stack
-*/
-static void clearbuff (BuffFS *buff) {
-  pushstr(buff, buff->space, buff->blen);  /* push buffer contents */
-  buff->blen = 0;  /* space now is empty */
-}
-
-
-/*
-** Get a space of size 'sz' in the buffer. If buffer has not enough
-** space, empty it. 'sz' must fit in an empty buffer.
-*/
-static char *getbuff (BuffFS *buff, int sz) {
-  lua_assert(buff->blen <= BUFVFS); lua_assert(sz <= BUFVFS);
-  if (sz > BUFVFS - buff->blen)  /* not enough space? */
-    clearbuff(buff);
-  return buff->space + buff->blen;
-}
-
-
-#define addsize(b,sz)	((b)->blen += (sz))
-
-
-/*
-** Add 'str' to the buffer. If string is larger than the buffer space,
-** push the string directly to the stack.
-*/
-static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
-  if (slen <= BUFVFS) {  /* does string fit into buffer? */
-    char *bf = getbuff(buff, cast_int(slen));
-    memcpy(bf, str, slen);  /* add string to buffer */
-    addsize(buff, cast_int(slen));
-  }
-  else {  /* string larger than buffer */
-    clearbuff(buff);  /* string comes after buffer's content */
-    pushstr(buff, str, slen);  /* push string */
-  }
-}
-
-
-/*
-** Add a number to the buffer.
-*/
-static void addnum2buff (BuffFS *buff, TValue *num) {
-  char *numbuff = getbuff(buff, MAXNUMBER2STR);
-  int len = tostringbuff(num, numbuff);  /* format number into 'numbuff' */
-  addsize(buff, len);
-}
-
-
-/*
-** this function handles only '%d', '%c', '%f', '%p', '%s', and '%%'
+** this function handles only '%d', '%c', '%f', '%p', and '%s'
    conventional formats, plus Lua-specific '%I' and '%U'
 */
 const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
-  BuffFS buff;  /* holds last part of the result */
-  const char *e;  /* points to next '%' */
-  buff.pushed = buff.blen = 0;
-  buff.L = L;
-  while ((e = strchr(fmt, '%')) != NULL) {
-    addstr2buff(&buff, fmt, e - fmt);  /* add 'fmt' up to '%' */
-    switch (*(e + 1)) {  /* conversion specifier */
+  int n = 0;
+  for (;;) {
+    const char *e = strchr(fmt, '%');
+    if (e == NULL) break;
+    pushstr(L, fmt, e - fmt);
+    switch (*(e+1)) {
       case 's': {  /* zero-terminated string */
         const char *s = va_arg(argp, char *);
         if (s == NULL) s = "(null)";
-        addstr2buff(&buff, s, strlen(s));
+        pushstr(L, s, strlen(s));
         break;
       }
       case 'c': {  /* an 'int' as a character */
-        char c = cast_uchar(va_arg(argp, int));
-        addstr2buff(&buff, &c, sizeof(char));
+        char buff = cast(char, va_arg(argp, int));
+        if (lisprint(cast_uchar(buff)))
+          pushstr(L, &buff, 1);
+        else  /* non-printable character; print its code */
+          luaO_pushfstring(L, "<\\%d>", cast_uchar(buff));
         break;
       }
       case 'd': {  /* an 'int' */
-        TValue num;
-        setivalue(&num, va_arg(argp, int));
-        addnum2buff(&buff, &num);
-        break;
+        setivalue(L->top, va_arg(argp, int));
+        goto top2str;
       }
       case 'I': {  /* a 'lua_Integer' */
-        TValue num;
-        setivalue(&num, cast(lua_Integer, va_arg(argp, l_uacInt)));
-        addnum2buff(&buff, &num);
-        break;
+        setivalue(L->top, cast(lua_Integer, va_arg(argp, l_uacInt)));
+        goto top2str;
       }
       case 'f': {  /* a 'lua_Number' */
-        TValue num;
-        setfltvalue(&num, cast_num(va_arg(argp, l_uacNumber)));
-        addnum2buff(&buff, &num);
+        setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
+      top2str:  /* convert the top element to a string */
+        luaD_inctop(L);
+        luaO_tostring(L, L->top - 1);
         break;
       }
       case 'p': {  /* a pointer */
-        const int sz = 3 * sizeof(void*) + 8; /* enough space for '%p' */
-        char *bf = getbuff(&buff, sz);
+        char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */
         void *p = va_arg(argp, void *);
-        int len = lua_pointer2str(bf, sz, p);
-        addsize(&buff, len);
+        int l = lua_pointer2str(buff, sizeof(buff), p);
+        pushstr(L, buff, l);
         break;
       }
-      case 'U': {  /* a 'long' as a UTF-8 sequence */
-        char bf[UTF8BUFFSZ];
-        int len = luaO_utf8esc(bf, va_arg(argp, long));
-        addstr2buff(&buff, bf + UTF8BUFFSZ - len, len);
+      case 'U': {  /* an 'int' as a UTF-8 sequence */
+        char buff[UTF8BUFFSZ];
+        int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long)));
+        pushstr(L, buff + UTF8BUFFSZ - l, l);
         break;
       }
       case '%': {
-        addstr2buff(&buff, "%", 1);
+        pushstr(L, "%", 1);
         break;
       }
       default: {
@@ -527,12 +455,13 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
                          *(e + 1));
       }
     }
-    fmt = e + 2;  /* skip '%' and the specifier */
+    n += 2;
+    fmt = e+2;
   }
-  addstr2buff(&buff, fmt, strlen(fmt));  /* rest of 'fmt' */
-  clearbuff(&buff);  /* empty buffer into the stack */
-  lua_assert(buff.pushed == 1);
-  return svalue(s2v(L->top - 1));
+  luaD_checkstack(L, 1);
+  pushstr(L, fmt, strlen(fmt));
+  if (n > 0) luaV_concat(L, n + 1);
+  return svalue(L->top - 1);
 }
 
 
@@ -545,8 +474,9 @@ const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
   return msg;
 }
 
-/* }================================================================== */
 
+/* number of chars of a literal string without the ending \0 */
+#define LL(x)	(sizeof(x)/sizeof(char) - 1)
 
 #define RETS	"..."
 #define PRE	"[string \""
@@ -554,36 +484,36 @@ const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
 
 #define addstr(a,b,l)	( memcpy(a,b,(l) * sizeof(char)), a += (l) )
 
-void luaO_chunkid (char *out, const char *source, size_t srclen) {
-  size_t bufflen = LUA_IDSIZE;  /* free space in buffer */
+void luaO_chunkid (char *out, const char *source, size_t bufflen) {
+  size_t l = strlen(source);
   if (*source == '=') {  /* 'literal' source */
-    if (srclen <= bufflen)  /* small enough? */
-      memcpy(out, source + 1, srclen * sizeof(char));
+    if (l <= bufflen)  /* small enough? */
+      memcpy(out, source + 1, l * sizeof(char));
     else {  /* truncate it */
       addstr(out, source + 1, bufflen - 1);
       *out = '\0';
     }
   }
   else if (*source == '@') {  /* file name */
-    if (srclen <= bufflen)  /* small enough? */
-      memcpy(out, source + 1, srclen * sizeof(char));
+    if (l <= bufflen)  /* small enough? */
+      memcpy(out, source + 1, l * sizeof(char));
     else {  /* add '...' before rest of name */
       addstr(out, RETS, LL(RETS));
       bufflen -= LL(RETS);
-      memcpy(out, source + 1 + srclen - bufflen, bufflen * sizeof(char));
+      memcpy(out, source + 1 + l - bufflen, bufflen * sizeof(char));
     }
   }
   else {  /* string; format as [string "source"] */
     const char *nl = strchr(source, '\n');  /* find first new line (if any) */
     addstr(out, PRE, LL(PRE));  /* add prefix */
     bufflen -= LL(PRE RETS POS) + 1;  /* save space for prefix+suffix+'\0' */
-    if (srclen < bufflen && nl == NULL) {  /* small one-line source? */
-      addstr(out, source, srclen);  /* keep it */
+    if (l < bufflen && nl == NULL) {  /* small one-line source? */
+      addstr(out, source, l);  /* keep it */
     }
     else {
-      if (nl != NULL) srclen = nl - source;  /* stop at first newline */
-      if (srclen > bufflen) srclen = bufflen;
-      addstr(out, source, srclen);
+      if (nl != NULL) l = nl - source;  /* stop at first newline */
+      if (l > bufflen) l = bufflen;
+      addstr(out, source, l);
       addstr(out, RETS, LL(RETS));
     }
     memcpy(out, POS, (LL(POS) + 1) * sizeof(char));

lopcodes.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.c $
+** $Id: lopcodes.c,v 1.55.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -10,95 +10,115 @@
 #include "lprefix.h"
 
 
+#include <stddef.h>
+
 #include "lopcodes.h"
 
 
 /* ORDER OP */
 
-LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
-/*       MM OT IT T  A  mode		   opcode  */
-  opmode(0, 0, 0, 0, 1, iABC)		/* OP_MOVE */
- ,opmode(0, 0, 0, 0, 1, iAsBx)		/* OP_LOADI */
- ,opmode(0, 0, 0, 0, 1, iAsBx)		/* OP_LOADF */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_LOADK */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_LOADKX */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADFALSE */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LFALSESKIP */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADTRUE */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LOADNIL */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETUPVAL */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETUPVAL */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETTABUP */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETTABLE */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETI */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_GETFIELD */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETTABUP */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETTABLE */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETI */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_SETFIELD */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_NEWTABLE */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SELF */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADDI */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADDK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SUBK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MULK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MODK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_POWK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_DIVK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_IDIVK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BANDK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BORK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BXORK */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHRI */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHLI */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_ADD */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SUB */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MUL */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_MOD */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_POW */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_DIV */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_IDIV */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BAND */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BOR */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BXOR */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHL */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_SHR */
- ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBIN */
- ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBINI*/
- ,opmode(1, 0, 0, 0, 0, iABC)		/* OP_MMBINK*/
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_UNM */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_BNOT */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_NOT */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_LEN */
- ,opmode(0, 0, 0, 0, 1, iABC)		/* OP_CONCAT */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_CLOSE */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_TBC */
- ,opmode(0, 0, 0, 0, 0, isJ)		/* OP_JMP */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQ */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LT */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LE */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQK */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_EQI */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LTI */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_LEI */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_GTI */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_GEI */
- ,opmode(0, 0, 0, 1, 0, iABC)		/* OP_TEST */
- ,opmode(0, 0, 0, 1, 1, iABC)		/* OP_TESTSET */
- ,opmode(0, 1, 1, 0, 1, iABC)		/* OP_CALL */
- ,opmode(0, 1, 1, 0, 1, iABC)		/* OP_TAILCALL */
- ,opmode(0, 0, 1, 0, 0, iABC)		/* OP_RETURN */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_RETURN0 */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_RETURN1 */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_FORLOOP */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_FORPREP */
- ,opmode(0, 0, 0, 0, 0, iABx)		/* OP_TFORPREP */
- ,opmode(0, 0, 0, 0, 0, iABC)		/* OP_TFORCALL */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_TFORLOOP */
- ,opmode(0, 0, 1, 0, 0, iABC)		/* OP_SETLIST */
- ,opmode(0, 0, 0, 0, 1, iABx)		/* OP_CLOSURE */
- ,opmode(0, 1, 0, 0, 1, iABC)		/* OP_VARARG */
- ,opmode(0, 0, 1, 0, 1, iABC)		/* OP_VARARGPREP */
- ,opmode(0, 0, 0, 0, 0, iAx)		/* OP_EXTRAARG */
+LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
+  "MOVE",
+  "LOADK",
+  "LOADKX",
+  "LOADBOOL",
+  "LOADNIL",
+  "GETUPVAL",
+  "GETTABUP",
+  "GETTABLE",
+  "SETTABUP",
+  "SETUPVAL",
+  "SETTABLE",
+  "NEWTABLE",
+  "SELF",
+  "ADD",
+  "SUB",
+  "MUL",
+  "MOD",
+  "POW",
+  "DIV",
+  "IDIV",
+  "BAND",
+  "BOR",
+  "BXOR",
+  "SHL",
+  "SHR",
+  "UNM",
+  "BNOT",
+  "NOT",
+  "LEN",
+  "CONCAT",
+  "JMP",
+  "EQ",
+  "LT",
+  "LE",
+  "TEST",
+  "TESTSET",
+  "CALL",
+  "TAILCALL",
+  "RETURN",
+  "FORLOOP",
+  "FORPREP",
+  "TFORCALL",
+  "TFORLOOP",
+  "SETLIST",
+  "CLOSURE",
+  "VARARG",
+  "EXTRAARG",
+  NULL
+};
+
+
+#define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m))
+
+LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
+/*       T  A    B       C     mode		   opcode	*/
+  opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_MOVE */
+ ,opmode(0, 1, OpArgK, OpArgN, iABx)		/* OP_LOADK */
+ ,opmode(0, 1, OpArgN, OpArgN, iABx)		/* OP_LOADKX */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_LOADBOOL */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_LOADNIL */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_GETUPVAL */
+ ,opmode(0, 1, OpArgU, OpArgK, iABC)		/* OP_GETTABUP */
+ ,opmode(0, 1, OpArgR, OpArgK, iABC)		/* OP_GETTABLE */
+ ,opmode(0, 0, OpArgK, OpArgK, iABC)		/* OP_SETTABUP */
+ ,opmode(0, 0, OpArgU, OpArgN, iABC)		/* OP_SETUPVAL */
+ ,opmode(0, 0, OpArgK, OpArgK, iABC)		/* OP_SETTABLE */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_NEWTABLE */
+ ,opmode(0, 1, OpArgR, OpArgK, iABC)		/* OP_SELF */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_ADD */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SUB */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MUL */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MOD */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_POW */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_IDIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BAND */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BOR */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BXOR */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SHL */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SHR */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_UNM */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_BNOT */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_NOT */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LEN */
+ ,opmode(0, 1, OpArgR, OpArgR, iABC)		/* OP_CONCAT */
+ ,opmode(0, 0, OpArgR, OpArgN, iAsBx)		/* OP_JMP */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_EQ */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LT */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LE */
+ ,opmode(1, 0, OpArgN, OpArgU, iABC)		/* OP_TEST */
+ ,opmode(1, 1, OpArgR, OpArgU, iABC)		/* OP_TESTSET */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_CALL */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_TAILCALL */
+ ,opmode(0, 0, OpArgU, OpArgN, iABC)		/* OP_RETURN */
+ ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_FORLOOP */
+ ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_FORPREP */
+ ,opmode(0, 0, OpArgN, OpArgU, iABC)		/* OP_TFORCALL */
+ ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_TFORLOOP */
+ ,opmode(0, 0, OpArgU, OpArgU, iABC)		/* OP_SETLIST */
+ ,opmode(0, 1, OpArgU, OpArgN, iABx)		/* OP_CLOSURE */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_VARARG */
+ ,opmode(0, 0, OpArgU, OpArgU, iAx)		/* OP_EXTRAARG */
 };
 

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h $
+** $Id: lopcodes.h,v 1.149.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -11,94 +11,69 @@
 
 
 /*===========================================================================
-  We assume that instructions are unsigned 32-bit integers.
-  All instructions have an opcode in the first 7 bits.
-  Instructions can have the following formats:
+  We assume that instructions are unsigned numbers.
+  All instructions have an opcode in the first 6 bits.
+  Instructions can have the following fields:
+	'A' : 8 bits
+	'B' : 9 bits
+	'C' : 9 bits
+	'Ax' : 26 bits ('A', 'B', and 'C' together)
+	'Bx' : 18 bits ('B' and 'C' together)
+	'sBx' : signed Bx
 
-        3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
-        1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
-iABC          C(8)     |      B(8)     |k|     A(8)      |   Op(7)     |
-iABx                Bx(17)               |     A(8)      |   Op(7)     |
-iAsBx              sBx (signed)(17)      |     A(8)      |   Op(7)     |
-iAx                           Ax(25)                     |   Op(7)     |
-isJ                           sJ(25)                     |   Op(7)     |
-
-  A signed argument is represented in excess K: the represented value is
-  the written unsigned value minus K, where K is half the maximum for the
-  corresponding unsigned argument.
+  A signed argument is represented in excess K; that is, the number
+  value is the unsigned value minus K. K is exactly the maximum value
+  for that argument (so that -max is represented by 0, and +max is
+  represented by 2*max), which is half the maximum for the corresponding
+  unsigned argument.
 ===========================================================================*/
 
 
-enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
+enum OpMode {iABC, iABx, iAsBx, iAx};  /* basic instruction format */
 
 
 /*
 ** size and position of opcode arguments.
 */
-#define SIZE_C		8
-#define SIZE_B		8
-#define SIZE_Bx		(SIZE_C + SIZE_B + 1)
+#define SIZE_C		9
+#define SIZE_B		9
+#define SIZE_Bx		(SIZE_C + SIZE_B)
 #define SIZE_A		8
-#define SIZE_Ax		(SIZE_Bx + SIZE_A)
-#define SIZE_sJ		(SIZE_Bx + SIZE_A)
+#define SIZE_Ax		(SIZE_C + SIZE_B + SIZE_A)
 
-#define SIZE_OP		7
+#define SIZE_OP		6
 
 #define POS_OP		0
-
 #define POS_A		(POS_OP + SIZE_OP)
-#define POS_k		(POS_A + SIZE_A)
-#define POS_B		(POS_k + 1)
-#define POS_C		(POS_B + SIZE_B)
-
-#define POS_Bx		POS_k
-
+#define POS_C		(POS_A + SIZE_A)
+#define POS_B		(POS_C + SIZE_C)
+#define POS_Bx		POS_C
 #define POS_Ax		POS_A
 
-#define POS_sJ		POS_A
-
 
 /*
 ** limits for opcode arguments.
-** we use (signed) 'int' to manipulate most arguments,
-** so they must fit in ints.
+** we use (signed) int to manipulate most arguments,
+** so they must fit in LUAI_BITSINT-1 bits (-1 for sign)
 */
-
-/* Check whether type 'int' has at least 'b' bits ('b' < 32) */
-#define L_INTHASBITS(b)		((UINT_MAX >> ((b) - 1)) >= 1)
-
-
-#if L_INTHASBITS(SIZE_Bx)
-#define MAXARG_Bx	((1<<SIZE_Bx)-1)
+#if SIZE_Bx < LUAI_BITSINT-1
+#define MAXARG_Bx        ((1<<SIZE_Bx)-1)
+#define MAXARG_sBx        (MAXARG_Bx>>1)         /* 'sBx' is signed */
 #else
-#define MAXARG_Bx	MAX_INT
+#define MAXARG_Bx        MAX_INT
+#define MAXARG_sBx        MAX_INT
 #endif
 
-#define OFFSET_sBx	(MAXARG_Bx>>1)         /* 'sBx' is signed */
-
-
-#if L_INTHASBITS(SIZE_Ax)
+#if SIZE_Ax < LUAI_BITSINT-1
 #define MAXARG_Ax	((1<<SIZE_Ax)-1)
 #else
 #define MAXARG_Ax	MAX_INT
 #endif
 
-#if L_INTHASBITS(SIZE_sJ)
-#define MAXARG_sJ	((1 << SIZE_sJ) - 1)
-#else
-#define MAXARG_sJ	MAX_INT
-#endif
 
-#define OFFSET_sJ	(MAXARG_sJ >> 1)
-
-
-#define MAXARG_A	((1<<SIZE_A)-1)
-#define MAXARG_B	((1<<SIZE_B)-1)
-#define MAXARG_C	((1<<SIZE_C)-1)
-#define OFFSET_sC	(MAXARG_C >> 1)
-
-#define int2sC(i)	((i) + OFFSET_sC)
-#define sC2int(i)	((i) - OFFSET_sC)
+#define MAXARG_A        ((1<<SIZE_A)-1)
+#define MAXARG_B        ((1<<SIZE_B)-1)
+#define MAXARG_C        ((1<<SIZE_C)-1)
 
 
 /* creates a mask with 'n' 1 bits at position 'p' */
@@ -115,49 +90,33 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
 #define SET_OPCODE(i,o)	((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
 		((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
 
-#define checkopm(i,m)	(getOpMode(GET_OPCODE(i)) == m)
-
-
-#define getarg(i,pos,size)	(cast_int(((i)>>(pos)) & MASK1(size,0)))
+#define getarg(i,pos,size)	(cast(int, ((i)>>pos) & MASK1(size,0)))
 #define setarg(i,v,pos,size)	((i) = (((i)&MASK0(size,pos)) | \
                 ((cast(Instruction, v)<<pos)&MASK1(size,pos))))
 
 #define GETARG_A(i)	getarg(i, POS_A, SIZE_A)
 #define SETARG_A(i,v)	setarg(i, v, POS_A, SIZE_A)
 
-#define GETARG_B(i)	check_exp(checkopm(i, iABC), getarg(i, POS_B, SIZE_B))
-#define GETARG_sB(i)	sC2int(GETARG_B(i))
+#define GETARG_B(i)	getarg(i, POS_B, SIZE_B)
 #define SETARG_B(i,v)	setarg(i, v, POS_B, SIZE_B)
 
-#define GETARG_C(i)	check_exp(checkopm(i, iABC), getarg(i, POS_C, SIZE_C))
-#define GETARG_sC(i)	sC2int(GETARG_C(i))
+#define GETARG_C(i)	getarg(i, POS_C, SIZE_C)
 #define SETARG_C(i,v)	setarg(i, v, POS_C, SIZE_C)
 
-#define TESTARG_k(i)	check_exp(checkopm(i, iABC), (cast_int(((i) & (1u << POS_k)))))
-#define GETARG_k(i)	check_exp(checkopm(i, iABC), getarg(i, POS_k, 1))
-#define SETARG_k(i,v)	setarg(i, v, POS_k, 1)
-
-#define GETARG_Bx(i)	check_exp(checkopm(i, iABx), getarg(i, POS_Bx, SIZE_Bx))
+#define GETARG_Bx(i)	getarg(i, POS_Bx, SIZE_Bx)
 #define SETARG_Bx(i,v)	setarg(i, v, POS_Bx, SIZE_Bx)
 
-#define GETARG_Ax(i)	check_exp(checkopm(i, iAx), getarg(i, POS_Ax, SIZE_Ax))
+#define GETARG_Ax(i)	getarg(i, POS_Ax, SIZE_Ax)
 #define SETARG_Ax(i,v)	setarg(i, v, POS_Ax, SIZE_Ax)
 
-#define GETARG_sBx(i)  \
-	check_exp(checkopm(i, iAsBx), getarg(i, POS_Bx, SIZE_Bx) - OFFSET_sBx)
-#define SETARG_sBx(i,b)	SETARG_Bx((i),cast_uint((b)+OFFSET_sBx))
-
-#define GETARG_sJ(i)  \
-	check_exp(checkopm(i, isJ), getarg(i, POS_sJ, SIZE_sJ) - OFFSET_sJ)
-#define SETARG_sJ(i,j) \
-	setarg(i, cast_uint((j)+OFFSET_sJ), POS_sJ, SIZE_sJ)
+#define GETARG_sBx(i)	(GETARG_Bx(i)-MAXARG_sBx)
+#define SETARG_sBx(i,b)	SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx))
 
 
-#define CREATE_ABCk(o,a,b,c,k)	((cast(Instruction, o)<<POS_OP) \
+#define CREATE_ABC(o,a,b,c)	((cast(Instruction, o)<<POS_OP) \
 			| (cast(Instruction, a)<<POS_A) \
 			| (cast(Instruction, b)<<POS_B) \
-			| (cast(Instruction, c)<<POS_C) \
-			| (cast(Instruction, k)<<POS_k))
+			| (cast(Instruction, c)<<POS_C))
 
 #define CREATE_ABx(o,a,bc)	((cast(Instruction, o)<<POS_OP) \
 			| (cast(Instruction, a)<<POS_A) \
@@ -166,15 +125,27 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
 #define CREATE_Ax(o,a)		((cast(Instruction, o)<<POS_OP) \
 			| (cast(Instruction, a)<<POS_Ax))
 
-#define CREATE_sJ(o,j,k)	((cast(Instruction, o) << POS_OP) \
-			| (cast(Instruction, j) << POS_sJ) \
-			| (cast(Instruction, k) << POS_k))
 
+/*
+** Macros to operate RK indices
+*/
+
+/* this bit 1 means constant (0 means register) */
+#define BITRK		(1 << (SIZE_B - 1))
+
+/* test whether value is a constant */
+#define ISK(x)		((x) & BITRK)
+
+/* gets the index of the constant */
+#define INDEXK(r)	((int)(r) & ~BITRK)
 
 #if !defined(MAXINDEXRK)  /* (for debugging only) */
-#define MAXINDEXRK	MAXARG_B
+#define MAXINDEXRK	(BITRK - 1)
 #endif
 
+/* code a constant index as a RK value */
+#define RKASK(x)	((x) | BITRK)
+
 
 /*
 ** invalid register that fits in 8 bits
@@ -183,9 +154,9 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
 
 
 /*
-** R[x] - register
-** K[x] - constant (in constant table)
-** RK(x) == if k(i) then K[x] else R[x]
+** R(x) - register
+** Kst(x) - constant (in constant table)
+** RK(x) == if ISK(x) then Kst(INDEXK(x)) else R(x)
 */
 
 
@@ -195,198 +166,132 @@ enum OpMode {iABC, iABx, iAsBx, iAx, isJ};  /* basic instruction formats */
 
 typedef enum {
 /*----------------------------------------------------------------------
-  name		args	description
+name		args	description
 ------------------------------------------------------------------------*/
-OP_MOVE,/*	A B	R[A] := R[B]					*/
-OP_LOADI,/*	A sBx	R[A] := sBx					*/
-OP_LOADF,/*	A sBx	R[A] := (lua_Number)sBx				*/
-OP_LOADK,/*	A Bx	R[A] := K[Bx]					*/
-OP_LOADKX,/*	A	R[A] := K[extra arg]				*/
-OP_LOADFALSE,/*	A	R[A] := false					*/
-OP_LFALSESKIP,/*A	R[A] := false; pc++				*/
-OP_LOADTRUE,/*	A	R[A] := true					*/
-OP_LOADNIL,/*	A B	R[A], R[A+1], ..., R[A+B] := nil		*/
-OP_GETUPVAL,/*	A B	R[A] := UpValue[B]				*/
-OP_SETUPVAL,/*	A B	UpValue[B] := R[A]				*/
+OP_MOVE,/*	A B	R(A) := R(B)					*/
+OP_LOADK,/*	A Bx	R(A) := Kst(Bx)					*/
+OP_LOADKX,/*	A 	R(A) := Kst(extra arg)				*/
+OP_LOADBOOL,/*	A B C	R(A) := (Bool)B; if (C) pc++			*/
+OP_LOADNIL,/*	A B	R(A), R(A+1), ..., R(A+B) := nil		*/
+OP_GETUPVAL,/*	A B	R(A) := UpValue[B]				*/
 
-OP_GETTABUP,/*	A B C	R[A] := UpValue[B][K[C]:string]			*/
-OP_GETTABLE,/*	A B C	R[A] := R[B][R[C]]				*/
-OP_GETI,/*	A B C	R[A] := R[B][C]					*/
-OP_GETFIELD,/*	A B C	R[A] := R[B][K[C]:string]			*/
+OP_GETTABUP,/*	A B C	R(A) := UpValue[B][RK(C)]			*/
+OP_GETTABLE,/*	A B C	R(A) := R(B)[RK(C)]				*/
 
-OP_SETTABUP,/*	A B C	UpValue[A][K[B]:string] := RK(C)		*/
-OP_SETTABLE,/*	A B C	R[A][R[B]] := RK(C)				*/
-OP_SETI,/*	A B C	R[A][B] := RK(C)				*/
-OP_SETFIELD,/*	A B C	R[A][K[B]:string] := RK(C)			*/
+OP_SETTABUP,/*	A B C	UpValue[A][RK(B)] := RK(C)			*/
+OP_SETUPVAL,/*	A B	UpValue[B] := R(A)				*/
+OP_SETTABLE,/*	A B C	R(A)[RK(B)] := RK(C)				*/
 
-OP_NEWTABLE,/*	A B C k	R[A] := {}					*/
+OP_NEWTABLE,/*	A B C	R(A) := {} (size = B,C)				*/
 
-OP_SELF,/*	A B C	R[A+1] := R[B]; R[A] := R[B][RK(C):string]	*/
+OP_SELF,/*	A B C	R(A+1) := R(B); R(A) := R(B)[RK(C)]		*/
 
-OP_ADDI,/*	A B sC	R[A] := R[B] + sC				*/
+OP_ADD,/*	A B C	R(A) := RK(B) + RK(C)				*/
+OP_SUB,/*	A B C	R(A) := RK(B) - RK(C)				*/
+OP_MUL,/*	A B C	R(A) := RK(B) * RK(C)				*/
+OP_MOD,/*	A B C	R(A) := RK(B) % RK(C)				*/
+OP_POW,/*	A B C	R(A) := RK(B) ^ RK(C)				*/
+OP_DIV,/*	A B C	R(A) := RK(B) / RK(C)				*/
+OP_IDIV,/*	A B C	R(A) := RK(B) // RK(C)				*/
+OP_BAND,/*	A B C	R(A) := RK(B) & RK(C)				*/
+OP_BOR,/*	A B C	R(A) := RK(B) | RK(C)				*/
+OP_BXOR,/*	A B C	R(A) := RK(B) ~ RK(C)				*/
+OP_SHL,/*	A B C	R(A) := RK(B) << RK(C)				*/
+OP_SHR,/*	A B C	R(A) := RK(B) >> RK(C)				*/
+OP_UNM,/*	A B	R(A) := -R(B)					*/
+OP_BNOT,/*	A B	R(A) := ~R(B)					*/
+OP_NOT,/*	A B	R(A) := not R(B)				*/
+OP_LEN,/*	A B	R(A) := length of R(B)				*/
 
-OP_ADDK,/*	A B C	R[A] := R[B] + K[C]:number			*/
-OP_SUBK,/*	A B C	R[A] := R[B] - K[C]:number			*/
-OP_MULK,/*	A B C	R[A] := R[B] * K[C]:number			*/
-OP_MODK,/*	A B C	R[A] := R[B] % K[C]:number			*/
-OP_POWK,/*	A B C	R[A] := R[B] ^ K[C]:number			*/
-OP_DIVK,/*	A B C	R[A] := R[B] / K[C]:number			*/
-OP_IDIVK,/*	A B C	R[A] := R[B] // K[C]:number			*/
+OP_CONCAT,/*	A B C	R(A) := R(B).. ... ..R(C)			*/
 
-OP_BANDK,/*	A B C	R[A] := R[B] & K[C]:integer			*/
-OP_BORK,/*	A B C	R[A] := R[B] | K[C]:integer			*/
-OP_BXORK,/*	A B C	R[A] := R[B] ~ K[C]:integer			*/
+OP_JMP,/*	A sBx	pc+=sBx; if (A) close all upvalues >= R(A - 1)	*/
+OP_EQ,/*	A B C	if ((RK(B) == RK(C)) ~= A) then pc++		*/
+OP_LT,/*	A B C	if ((RK(B) <  RK(C)) ~= A) then pc++		*/
+OP_LE,/*	A B C	if ((RK(B) <= RK(C)) ~= A) then pc++		*/
 
-OP_SHRI,/*	A B sC	R[A] := R[B] >> sC				*/
-OP_SHLI,/*	A B sC	R[A] := sC << R[B]				*/
+OP_TEST,/*	A C	if not (R(A) <=> C) then pc++			*/
+OP_TESTSET,/*	A B C	if (R(B) <=> C) then R(A) := R(B) else pc++	*/
 
-OP_ADD,/*	A B C	R[A] := R[B] + R[C]				*/
-OP_SUB,/*	A B C	R[A] := R[B] - R[C]				*/
-OP_MUL,/*	A B C	R[A] := R[B] * R[C]				*/
-OP_MOD,/*	A B C	R[A] := R[B] % R[C]				*/
-OP_POW,/*	A B C	R[A] := R[B] ^ R[C]				*/
-OP_DIV,/*	A B C	R[A] := R[B] / R[C]				*/
-OP_IDIV,/*	A B C	R[A] := R[B] // R[C]				*/
+OP_CALL,/*	A B C	R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
+OP_TAILCALL,/*	A B C	return R(A)(R(A+1), ... ,R(A+B-1))		*/
+OP_RETURN,/*	A B	return R(A), ... ,R(A+B-2)	(see note)	*/
 
-OP_BAND,/*	A B C	R[A] := R[B] & R[C]				*/
-OP_BOR,/*	A B C	R[A] := R[B] | R[C]				*/
-OP_BXOR,/*	A B C	R[A] := R[B] ~ R[C]				*/
-OP_SHL,/*	A B C	R[A] := R[B] << R[C]				*/
-OP_SHR,/*	A B C	R[A] := R[B] >> R[C]				*/
+OP_FORLOOP,/*	A sBx	R(A)+=R(A+2);
+			if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
+OP_FORPREP,/*	A sBx	R(A)-=R(A+2); pc+=sBx				*/
 
-OP_MMBIN,/*	A B C	call C metamethod over R[A] and R[B]		*/
-OP_MMBINI,/*	A sB C k	call C metamethod over R[A] and sB	*/
-OP_MMBINK,/*	A B C k		call C metamethod over R[A] and K[B]	*/
+OP_TFORCALL,/*	A C	R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));	*/
+OP_TFORLOOP,/*	A sBx	if R(A+1) ~= nil then { R(A)=R(A+1); pc += sBx }*/
 
-OP_UNM,/*	A B	R[A] := -R[B]					*/
-OP_BNOT,/*	A B	R[A] := ~R[B]					*/
-OP_NOT,/*	A B	R[A] := not R[B]				*/
-OP_LEN,/*	A B	R[A] := #R[B] (length operator)			*/
+OP_SETLIST,/*	A B C	R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B	*/
 
-OP_CONCAT,/*	A B	R[A] := R[A].. ... ..R[A + B - 1]		*/
+OP_CLOSURE,/*	A Bx	R(A) := closure(KPROTO[Bx])			*/
 
-OP_CLOSE,/*	A	close all upvalues >= R[A]			*/
-OP_TBC,/*	A	mark variable A "to be closed"			*/
-OP_JMP,/*	sJ	pc += sJ					*/
-OP_EQ,/*	A B k	if ((R[A] == R[B]) ~= k) then pc++		*/
-OP_LT,/*	A B k	if ((R[A] <  R[B]) ~= k) then pc++		*/
-OP_LE,/*	A B k	if ((R[A] <= R[B]) ~= k) then pc++		*/
-
-OP_EQK,/*	A B k	if ((R[A] == K[B]) ~= k) then pc++		*/
-OP_EQI,/*	A sB k	if ((R[A] == sB) ~= k) then pc++		*/
-OP_LTI,/*	A sB k	if ((R[A] < sB) ~= k) then pc++			*/
-OP_LEI,/*	A sB k	if ((R[A] <= sB) ~= k) then pc++		*/
-OP_GTI,/*	A sB k	if ((R[A] > sB) ~= k) then pc++			*/
-OP_GEI,/*	A sB k	if ((R[A] >= sB) ~= k) then pc++		*/
-
-OP_TEST,/*	A k	if (not R[A] == k) then pc++			*/
-OP_TESTSET,/*	A B k	if (not R[B] == k) then pc++ else R[A] := R[B]	*/
-
-OP_CALL,/*	A B C	R[A], ... ,R[A+C-2] := R[A](R[A+1], ... ,R[A+B-1]) */
-OP_TAILCALL,/*	A B C k	return R[A](R[A+1], ... ,R[A+B-1])		*/
-
-OP_RETURN,/*	A B C k	return R[A], ... ,R[A+B-2]	(see note)	*/
-OP_RETURN0,/*		return						*/
-OP_RETURN1,/*	A	return R[A]					*/
-
-OP_FORLOOP,/*	A Bx	update counters; if loop continues then pc-=Bx; */
-OP_FORPREP,/*	A Bx	<check values and prepare counters>;
-                        if not to run then pc+=Bx+1;			*/
-
-OP_TFORPREP,/*	A Bx	create upvalue for R[A + 3]; pc+=Bx		*/
-OP_TFORCALL,/*	A C	R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]);	*/
-OP_TFORLOOP,/*	A Bx	if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx }	*/
-
-OP_SETLIST,/*	A B C k	R[A][C+i] := R[A+i], 1 <= i <= B		*/
-
-OP_CLOSURE,/*	A Bx	R[A] := closure(KPROTO[Bx])			*/
-
-OP_VARARG,/*	A C	R[A], R[A+1], ..., R[A+C-2] = vararg		*/
-
-OP_VARARGPREP,/*A	(adjust vararg parameters)			*/
+OP_VARARG,/*	A B	R(A), R(A+1), ..., R(A+B-2) = vararg		*/
 
 OP_EXTRAARG/*	Ax	extra (larger) argument for previous opcode	*/
 } OpCode;
 
 
-#define NUM_OPCODES	((int)(OP_EXTRAARG) + 1)
+#define NUM_OPCODES	(cast(int, OP_EXTRAARG) + 1)
 
 
 
 /*===========================================================================
   Notes:
-  (*) In OP_CALL, if (B == 0) then B = top - A. If (C == 0), then
-  'top' is set to last_result+1, so next open instruction (OP_CALL,
-  OP_RETURN*, OP_SETLIST) may use 'top'.
+  (*) In OP_CALL, if (B == 0) then B = top. If (C == 0), then 'top' is
+  set to last_result+1, so next open instruction (OP_CALL, OP_RETURN,
+  OP_SETLIST) may use 'top'.
 
-  (*) In OP_VARARG, if (C == 0) then use actual number of varargs and
+  (*) In OP_VARARG, if (B == 0) then use actual number of varargs and
   set top (like in OP_CALL with C == 0).
 
   (*) In OP_RETURN, if (B == 0) then return up to 'top'.
 
-  (*) In OP_LOADKX and OP_NEWTABLE, the next instruction is always
-  OP_EXTRAARG.
+  (*) In OP_SETLIST, if (B == 0) then B = 'top'; if (C == 0) then next
+  'instruction' is EXTRAARG(real C).
 
-  (*) In OP_SETLIST, if (B == 0) then real B = 'top'; if k, then
-  real C = EXTRAARG _ C (the bits of EXTRAARG concatenated with the
-  bits of C).
+  (*) In OP_LOADKX, the next 'instruction' is always EXTRAARG.
 
-  (*) In OP_NEWTABLE, B is log2 of the hash size (which is always a
-  power of 2) plus 1, or zero for size zero. If not k, the array size
-  is C. Otherwise, the array size is EXTRAARG _ C.
-
-  (*) For comparisons, k specifies what condition the test should accept
+  (*) For comparisons, A specifies what condition the test should accept
   (true or false).
 
-  (*) In OP_MMBINI/OP_MMBINK, k means the arguments were flipped
-   (the constant is the first operand).
-
   (*) All 'skips' (pc++) assume that next instruction is a jump.
 
-  (*) In instructions OP_RETURN/OP_TAILCALL, 'k' specifies that the
-  function builds upvalues, which may need to be closed. C > 0 means
-  the function is vararg, so that its 'func' must be corrected before
-  returning; in this case, (C - 1) is its number of fixed parameters.
-
-  (*) In comparisons with an immediate operand, C signals whether the
-  original operand was a float. (It must be corrected in case of
-  metamethods.)
-
 ===========================================================================*/
 
 
 /*
 ** masks for instruction properties. The format is:
-** bits 0-2: op mode
-** bit 3: instruction set register A
-** bit 4: operator is a test (next instruction must be a jump)
-** bit 5: instruction uses 'L->top' set by previous instruction (when B == 0)
-** bit 6: instruction sets 'L->top' for next instruction (when C == 0)
-** bit 7: instruction is an MM instruction (call a metamethod)
+** bits 0-1: op mode
+** bits 2-3: C arg mode
+** bits 4-5: B arg mode
+** bit 6: instruction set register A
+** bit 7: operator is a test (next instruction must be a jump)
 */
 
-LUAI_DDEC(const lu_byte luaP_opmodes[NUM_OPCODES];)
+enum OpArgMask {
+  OpArgN,  /* argument is not used */
+  OpArgU,  /* argument is used */
+  OpArgR,  /* argument is a register or a jump offset */
+  OpArgK   /* argument is a constant or register/constant */
+};
 
-#define getOpMode(m)	(cast(enum OpMode, luaP_opmodes[m] & 7))
-#define testAMode(m)	(luaP_opmodes[m] & (1 << 3))
-#define testTMode(m)	(luaP_opmodes[m] & (1 << 4))
-#define testITMode(m)	(luaP_opmodes[m] & (1 << 5))
-#define testOTMode(m)	(luaP_opmodes[m] & (1 << 6))
-#define testMMMode(m)	(luaP_opmodes[m] & (1 << 7))
+LUAI_DDEC const lu_byte luaP_opmodes[NUM_OPCODES];
 
-/* "out top" (set top for next instruction) */
-#define isOT(i)  \
-	((testOTMode(GET_OPCODE(i)) && GETARG_C(i) == 0) || \
-          GET_OPCODE(i) == OP_TAILCALL)
+#define getOpMode(m)	(cast(enum OpMode, luaP_opmodes[m] & 3))
+#define getBMode(m)	(cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3))
+#define getCMode(m)	(cast(enum OpArgMask, (luaP_opmodes[m] >> 2) & 3))
+#define testAMode(m)	(luaP_opmodes[m] & (1 << 6))
+#define testTMode(m)	(luaP_opmodes[m] & (1 << 7))
 
-/* "in top" (uses top from previous instruction) */
-#define isIT(i)		(testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0)
 
-#define opmode(mm,ot,it,t,a,m)  \
-    (((mm) << 7) | ((ot) << 6) | ((it) << 5) | ((t) << 4) | ((a) << 3) | (m))
+LUAI_DDEC const char *const luaP_opnames[NUM_OPCODES+1];  /* opcode names */
 
 
 /* number of list items to accumulate before a SETLIST instruction */
 #define LFIELDS_PER_FLUSH	50
 
+
 #endif

lopnames.h

@@ -1,103 +0,0 @@
-/*
-** $Id: lopnames.h $
-** Opcode names
-** See Copyright Notice in lua.h
-*/
-
-#if !defined(lopnames_h)
-#define lopnames_h
-
-#include <stddef.h>
-
-
-/* ORDER OP */
-
-static const char *const opnames[] = {
-  "MOVE",
-  "LOADI",
-  "LOADF",
-  "LOADK",
-  "LOADKX",
-  "LOADFALSE",
-  "LFALSESKIP",
-  "LOADTRUE",
-  "LOADNIL",
-  "GETUPVAL",
-  "SETUPVAL",
-  "GETTABUP",
-  "GETTABLE",
-  "GETI",
-  "GETFIELD",
-  "SETTABUP",
-  "SETTABLE",
-  "SETI",
-  "SETFIELD",
-  "NEWTABLE",
-  "SELF",
-  "ADDI",
-  "ADDK",
-  "SUBK",
-  "MULK",
-  "MODK",
-  "POWK",
-  "DIVK",
-  "IDIVK",
-  "BANDK",
-  "BORK",
-  "BXORK",
-  "SHRI",
-  "SHLI",
-  "ADD",
-  "SUB",
-  "MUL",
-  "MOD",
-  "POW",
-  "DIV",
-  "IDIV",
-  "BAND",
-  "BOR",
-  "BXOR",
-  "SHL",
-  "SHR",
-  "MMBIN",
-  "MMBINI",
-  "MMBINK",
-  "UNM",
-  "BNOT",
-  "NOT",
-  "LEN",
-  "CONCAT",
-  "CLOSE",
-  "TBC",
-  "JMP",
-  "EQ",
-  "LT",
-  "LE",
-  "EQK",
-  "EQI",
-  "LTI",
-  "LEI",
-  "GTI",
-  "GEI",
-  "TEST",
-  "TESTSET",
-  "CALL",
-  "TAILCALL",
-  "RETURN",
-  "RETURN0",
-  "RETURN1",
-  "FORLOOP",
-  "FORPREP",
-  "TFORPREP",
-  "TFORCALL",
-  "TFORLOOP",
-  "SETLIST",
-  "CLOSURE",
-  "VARARG",
-  "VARARGPREP",
-  "EXTRAARG",
-  NULL
-};
-
-#endif
-

loslib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c $
+** $Id: loslib.c,v 1.65.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -59,20 +59,18 @@
 ** ===================================================================
 */
 
+#if !defined(l_time_t)		/* { */
 /*
 ** type to represent time_t in Lua
 */
-#if !defined(LUA_NUMTIME)	/* { */
-
 #define l_timet			lua_Integer
 #define l_pushtime(L,t)		lua_pushinteger(L,(lua_Integer)(t))
-#define l_gettime(L,arg)	luaL_checkinteger(L, arg)
 
-#else				/* }{ */
-
-#define l_timet			lua_Number
-#define l_pushtime(L,t)		lua_pushnumber(L,(lua_Number)(t))
-#define l_gettime(L,arg)	luaL_checknumber(L, arg)
+static time_t l_checktime (lua_State *L, int arg) {
+  lua_Integer t = luaL_checkinteger(L, arg);
+  luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
+  return (time_t)t;
+}
 
 #endif				/* } */
 
@@ -92,7 +90,7 @@
 
 /* ISO C definitions */
 #define l_gmtime(t,r)		((void)(r)->tm_sec, gmtime(t))
-#define l_localtime(t,r)	((void)(r)->tm_sec, localtime(t))
+#define l_localtime(t,r)  	((void)(r)->tm_sec, localtime(t))
 
 #endif				/* } */
 
@@ -139,11 +137,10 @@
 
 
 
+
 static int os_execute (lua_State *L) {
   const char *cmd = luaL_optstring(L, 1, NULL);
-  int stat;
-  errno = 0;
-  stat = system(cmd);
+  int stat = system(cmd);
   if (cmd != NULL)
     return luaL_execresult(L, stat);
   else {
@@ -170,7 +167,7 @@ static int os_tmpname (lua_State *L) {
   char buff[LUA_TMPNAMBUFSIZE];
   int err;
   lua_tmpnam(buff, err);
-  if (l_unlikely(err))
+  if (err)
     return luaL_error(L, "unable to generate a unique filename");
   lua_pushstring(L, buff);
   return 1;
@@ -197,25 +194,11 @@ static int os_clock (lua_State *L) {
 ** =======================================================
 */
 
-/*
-** About the overflow check: an overflow cannot occur when time
-** is represented by a lua_Integer, because either lua_Integer is
-** large enough to represent all int fields or it is not large enough
-** to represent a time that cause a field to overflow.  However, if
-** times are represented as doubles and lua_Integer is int, then the
-** time 0x1.e1853b0d184f6p+55 would cause an overflow when adding 1900
-** to compute the year.
-*/
-static void setfield (lua_State *L, const char *key, int value, int delta) {
-  #if (defined(LUA_NUMTIME) && LUA_MAXINTEGER <= INT_MAX)
-    if (l_unlikely(value > LUA_MAXINTEGER - delta))
-      luaL_error(L, "field '%s' is out-of-bound", key);
-  #endif
-  lua_pushinteger(L, (lua_Integer)value + delta);
+static void setfield (lua_State *L, const char *key, int value) {
+  lua_pushinteger(L, value);
   lua_setfield(L, -2, key);
 }
 
-
 static void setboolfield (lua_State *L, const char *key, int value) {
   if (value < 0)  /* undefined? */
     return;  /* does not set field */
@@ -228,14 +211,14 @@ static void setboolfield (lua_State *L, const char *key, int value) {
 ** Set all fields from structure 'tm' in the table on top of the stack
 */
 static void setallfields (lua_State *L, struct tm *stm) {
-  setfield(L, "year", stm->tm_year, 1900);
-  setfield(L, "month", stm->tm_mon, 1);
-  setfield(L, "day", stm->tm_mday, 0);
-  setfield(L, "hour", stm->tm_hour, 0);
-  setfield(L, "min", stm->tm_min, 0);
-  setfield(L, "sec", stm->tm_sec, 0);
-  setfield(L, "yday", stm->tm_yday, 1);
-  setfield(L, "wday", stm->tm_wday, 1);
+  setfield(L, "sec", stm->tm_sec);
+  setfield(L, "min", stm->tm_min);
+  setfield(L, "hour", stm->tm_hour);
+  setfield(L, "day", stm->tm_mday);
+  setfield(L, "month", stm->tm_mon + 1);
+  setfield(L, "year", stm->tm_year + 1900);
+  setfield(L, "wday", stm->tm_wday + 1);
+  setfield(L, "yday", stm->tm_yday + 1);
   setboolfield(L, "isdst", stm->tm_isdst);
 }
 
@@ -248,21 +231,24 @@ static int getboolfield (lua_State *L, const char *key) {
 }
 
 
+/* maximum value for date fields (to avoid arithmetic overflows with 'int') */
+#if !defined(L_MAXDATEFIELD)
+#define L_MAXDATEFIELD	(INT_MAX / 2)
+#endif
+
 static int getfield (lua_State *L, const char *key, int d, int delta) {
   int isnum;
   int t = lua_getfield(L, -1, key);  /* get field and its type */
   lua_Integer res = lua_tointegerx(L, -1, &isnum);
   if (!isnum) {  /* field is not an integer? */
-    if (l_unlikely(t != LUA_TNIL))  /* some other value? */
+    if (t != LUA_TNIL)  /* some other value? */
       return luaL_error(L, "field '%s' is not an integer", key);
-    else if (l_unlikely(d < 0))  /* absent field; no default? */
+    else if (d < 0)  /* absent field; no default? */
       return luaL_error(L, "field '%s' missing in date table", key);
     res = d;
   }
   else {
-    /* unsigned avoids overflow when lua_Integer has 32 bits */
-    if (!(res >= 0 ? (lua_Unsigned)res <= (lua_Unsigned)INT_MAX + delta
-                   : (lua_Integer)INT_MIN + delta <= res))
+    if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
       return luaL_error(L, "field '%s' is out-of-bound", key);
     res -= delta;
   }
@@ -290,13 +276,6 @@ static const char *checkoption (lua_State *L, const char *conv,
 }
 
 
-static time_t l_checktime (lua_State *L, int arg) {
-  l_timet t = l_gettime(L, arg);
-  luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
-  return (time_t)t;
-}
-
-
 /* maximum size for an individual 'strftime' item */
 #define SIZETIMEFMT	250
 
@@ -315,7 +294,7 @@ static int os_date (lua_State *L) {
     stm = l_localtime(&t, &tmr);
   if (stm == NULL)  /* invalid date? */
     return luaL_error(L,
-                 "date result cannot be represented in this installation");
+                 "time result cannot be represented in this installation");
   if (strcmp(s, "*t") == 0) {
     lua_createtable(L, 0, 9);  /* 9 = number of fields */
     setallfields(L, stm);
@@ -351,12 +330,12 @@ static int os_time (lua_State *L) {
     struct tm ts;
     luaL_checktype(L, 1, LUA_TTABLE);
     lua_settop(L, 1);  /* make sure table is at the top */
-    ts.tm_year = getfield(L, "year", -1, 1900);
-    ts.tm_mon = getfield(L, "month", -1, 1);
-    ts.tm_mday = getfield(L, "day", -1, 0);
-    ts.tm_hour = getfield(L, "hour", 12, 0);
-    ts.tm_min = getfield(L, "min", 0, 0);
     ts.tm_sec = getfield(L, "sec", 0, 0);
+    ts.tm_min = getfield(L, "min", 0, 0);
+    ts.tm_hour = getfield(L, "hour", 12, 0);
+    ts.tm_mday = getfield(L, "day", -1, 0);
+    ts.tm_mon = getfield(L, "month", -1, 1);
+    ts.tm_year = getfield(L, "year", -1, 1900);
     ts.tm_isdst = getboolfield(L, "isdst");
     t = mktime(&ts);
     setallfields(L, &ts);  /* update fields with normalized values */

lparser.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h $
+** $Id: lparser.h,v 1.76.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -23,96 +23,63 @@
 
 /* kinds of variables/expressions */
 typedef enum {
-  VVOID,  /* when 'expdesc' describes the last expression of a list,
+  VVOID,  /* when 'expdesc' describes the last expression a list,
              this kind means an empty list (so, no expression) */
   VNIL,  /* constant nil */
   VTRUE,  /* constant true */
   VFALSE,  /* constant false */
   VK,  /* constant in 'k'; info = index of constant in 'k' */
   VKFLT,  /* floating constant; nval = numerical float value */
-  VKINT,  /* integer constant; ival = numerical integer value */
-  VKSTR,  /* string constant; strval = TString address;
-             (string is fixed by the lexer) */
+  VKINT,  /* integer constant; nval = numerical integer value */
   VNONRELOC,  /* expression has its value in a fixed register;
                  info = result register */
-  VLOCAL,  /* local variable; var.ridx = register index;
-              var.vidx = relative index in 'actvar.arr'  */
+  VLOCAL,  /* local variable; info = local register */
   VUPVAL,  /* upvalue variable; info = index of upvalue in 'upvalues' */
-  VCONST,  /* compile-time <const> variable;
-              info = absolute index in 'actvar.arr'  */
   VINDEXED,  /* indexed variable;
-                ind.t = table register;
-                ind.idx = key's R index */
-  VINDEXUP,  /* indexed upvalue;
-                ind.t = table upvalue;
-                ind.idx = key's K index */
-  VINDEXI, /* indexed variable with constant integer;
-                ind.t = table register;
-                ind.idx = key's value */
-  VINDEXSTR, /* indexed variable with literal string;
-                ind.t = table register;
-                ind.idx = key's K index */
+                ind.vt = whether 't' is register or upvalue;
+                ind.t = table register or upvalue;
+                ind.idx = key's R/K index */
   VJMP,  /* expression is a test/comparison;
             info = pc of corresponding jump instruction */
-  VRELOC,  /* expression can put result in any register;
-              info = instruction pc */
+  VRELOCABLE,  /* expression can put result in any register;
+                  info = instruction pc */
   VCALL,  /* expression is a function call; info = instruction pc */
   VVARARG  /* vararg expression; info = instruction pc */
 } expkind;
 
 
-#define vkisvar(k)	(VLOCAL <= (k) && (k) <= VINDEXSTR)
-#define vkisindexed(k)	(VINDEXED <= (k) && (k) <= VINDEXSTR)
-
+#define vkisvar(k)	(VLOCAL <= (k) && (k) <= VINDEXED)
+#define vkisinreg(k)	((k) == VNONRELOC || (k) == VLOCAL)
 
 typedef struct expdesc {
   expkind k;
   union {
     lua_Integer ival;    /* for VKINT */
     lua_Number nval;  /* for VKFLT */
-    TString *strval;  /* for VKSTR */
     int info;  /* for generic use */
-    struct {  /* for indexed variables */
-      short idx;  /* index (R or "long" K) */
+    struct {  /* for indexed variables (VINDEXED) */
+      short idx;  /* index (R/K) */
       lu_byte t;  /* table (register or upvalue) */
+      lu_byte vt;  /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
     } ind;
-    struct {  /* for local variables */
-      lu_byte ridx;  /* register holding the variable */
-      unsigned short vidx;  /* compiler index (in 'actvar.arr')  */
-    } var;
   } u;
   int t;  /* patch list of 'exit when true' */
   int f;  /* patch list of 'exit when false' */
 } expdesc;
 
 
-/* kinds of variables */
-#define VDKREG		0   /* regular */
-#define RDKCONST	1   /* constant */
-#define RDKTOCLOSE	2   /* to-be-closed */
-#define RDKCTC		3   /* compile-time constant */
-
-/* description of an active local variable */
-typedef union Vardesc {
-  struct {
-    TValuefields;  /* constant value (if it is a compile-time constant) */
-    lu_byte kind;
-    lu_byte ridx;  /* register holding the variable */
-    short pidx;  /* index of the variable in the Proto's 'locvars' array */
-    TString *name;  /* variable name */
-  } vd;
-  TValue k;  /* constant value (if any) */
+/* description of active local variable */
+typedef struct Vardesc {
+  short idx;  /* variable index in stack */
 } Vardesc;
 
 
-
 /* description of pending goto statements and label statements */
 typedef struct Labeldesc {
   TString *name;  /* label identifier */
   int pc;  /* position in code */
   int line;  /* line where it appeared */
-  lu_byte nactvar;  /* number of active variables in that position */
-  lu_byte close;  /* goto that escapes upvalues */
+  lu_byte nactvar;  /* local level where it appears in current block */
 } Labeldesc;
 
 
@@ -126,7 +93,7 @@ typedef struct Labellist {
 
 /* dynamic structures used by the parser */
 typedef struct Dyndata {
-  struct {  /* list of all active local variables */
+  struct {  /* list of active local variables */
     Vardesc *arr;
     int n;
     int size;
@@ -148,22 +115,17 @@ typedef struct FuncState {
   struct BlockCnt *bl;  /* chain of current blocks */
   int pc;  /* next position to code (equivalent to 'ncode') */
   int lasttarget;   /* 'label' of last 'jump label' */
-  int previousline;  /* last line that was saved in 'lineinfo' */
+  int jpc;  /* list of pending jumps to 'pc' */
   int nk;  /* number of elements in 'k' */
   int np;  /* number of elements in 'p' */
-  int nabslineinfo;  /* number of elements in 'abslineinfo' */
   int firstlocal;  /* index of first local var (in Dyndata array) */
-  int firstlabel;  /* index of first label (in 'dyd->label->arr') */
-  short ndebugvars;  /* number of elements in 'f->locvars' */
+  short nlocvars;  /* number of elements in 'f->locvars' */
   lu_byte nactvar;  /* number of active local variables */
   lu_byte nups;  /* number of upvalues */
   lu_byte freereg;  /* first free register */
-  lu_byte iwthabs;  /* instructions issued since last absolute line info */
-  lu_byte needclose;  /* function needs to close upvalues when returning */
 } FuncState;
 
 
-LUAI_FUNC int luaY_nvarstack (FuncState *fs);
 LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
                                  Dyndata *dyd, const char *name, int firstchar);
 

lprefix.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lprefix.h $
+** $Id: lprefix.h,v 1.2.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Definitions for Lua code that must come before any other header file
 ** See Copyright Notice in lua.h
 */
@@ -33,7 +33,7 @@
 /*
 ** Windows stuff
 */
-#if defined(_WIN32)	/* { */
+#if defined(_WIN32) 	/* { */
 
 #if !defined(_CRT_SECURE_NO_WARNINGS)
 #define _CRT_SECURE_NO_WARNINGS  /* avoid warnings about ISO C functions */

lstate.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c $
+** $Id: lstate.c,v 2.133.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -28,6 +28,25 @@
 #include "ltm.h"
 
 
+#if !defined(LUAI_GCPAUSE)
+#define LUAI_GCPAUSE	200  /* 200% */
+#endif
+
+#if !defined(LUAI_GCMUL)
+#define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
+#endif
+
+
+/*
+** a macro to help the creation of a unique random seed when a state is
+** created; the seed is used to randomize hashes.
+*/
+#if !defined(luai_makeseed)
+#include <time.h>
+#define luai_makeseed()		cast(unsigned int, time(NULL))
+#endif
+
+
 
 /*
 ** thread state + extra space
@@ -52,35 +71,25 @@ typedef struct LG {
 
 
 /*
-** A macro to create a "random" seed when a state is created;
-** the seed is used to randomize string hashes.
-*/
-#if !defined(luai_makeseed)
-
-#include <time.h>
-
-/*
-** Compute an initial seed with some level of randomness.
-** Rely on Address Space Layout Randomization (if present) and
-** current time.
+** Compute an initial seed as random as possible. Rely on Address Space
+** Layout Randomization (if present) to increase randomness..
 */
 #define addbuff(b,p,e) \
-  { size_t t = cast_sizet(e); \
+  { size_t t = cast(size_t, e); \
     memcpy(b + p, &t, sizeof(t)); p += sizeof(t); }
 
-static unsigned int luai_makeseed (lua_State *L) {
-  char buff[3 * sizeof(size_t)];
-  unsigned int h = cast_uint(time(NULL));
+static unsigned int makeseed (lua_State *L) {
+  char buff[4 * sizeof(size_t)];
+  unsigned int h = luai_makeseed();
   int p = 0;
   addbuff(buff, p, L);  /* heap variable */
   addbuff(buff, p, &h);  /* local variable */
+  addbuff(buff, p, luaO_nilobject);  /* global variable */
   addbuff(buff, p, &lua_newstate);  /* public function */
   lua_assert(p == sizeof(buff));
   return luaS_hash(buff, p, h);
 }
 
-#endif
-
 
 /*
 ** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
@@ -96,21 +105,12 @@ void luaE_setdebt (global_State *g, l_mem debt) {
 }
 
 
-LUA_API int lua_setcstacklimit (lua_State *L, unsigned int limit) {
-  UNUSED(L); UNUSED(limit);
-  return LUAI_MAXCCALLS;  /* warning?? */
-}
-
-
 CallInfo *luaE_extendCI (lua_State *L) {
-  CallInfo *ci;
-  lua_assert(L->ci->next == NULL);
-  ci = luaM_new(L, CallInfo);
+  CallInfo *ci = luaM_new(L, CallInfo);
   lua_assert(L->ci->next == NULL);
   L->ci->next = ci;
   ci->previous = L->ci;
   ci->next = NULL;
-  ci->u.l.trap = 0;
   L->nci++;
   return ci;
 }
@@ -132,69 +132,37 @@ void luaE_freeCI (lua_State *L) {
 
 
 /*
-** free half of the CallInfo structures not in use by a thread,
-** keeping the first one.
+** free half of the CallInfo structures not in use by a thread
 */
 void luaE_shrinkCI (lua_State *L) {
-  CallInfo *ci = L->ci->next;  /* first free CallInfo */
-  CallInfo *next;
-  if (ci == NULL)
-    return;  /* no extra elements */
-  while ((next = ci->next) != NULL) {  /* two extra elements? */
-    CallInfo *next2 = next->next;  /* next's next */
-    ci->next = next2;  /* remove next from the list */
+  CallInfo *ci = L->ci;
+  CallInfo *next2;  /* next's next */
+  /* while there are two nexts */
+  while (ci->next != NULL && (next2 = ci->next->next) != NULL) {
+    luaM_free(L, ci->next);  /* free next */
     L->nci--;
-    luaM_free(L, next);  /* free next */
-    if (next2 == NULL)
-      break;  /* no more elements */
-    else {
-      next2->previous = ci;
-      ci = next2;  /* continue */
-    }
+    ci->next = next2;  /* remove 'next' from the list */
+    next2->previous = ci;
+    ci = next2;  /* keep next's next */
   }
 }
 
 
-/*
-** Called when 'getCcalls(L)' larger or equal to LUAI_MAXCCALLS.
-** If equal, raises an overflow error. If value is larger than
-** LUAI_MAXCCALLS (which means it is handling an overflow) but
-** not much larger, does not report an error (to allow overflow
-** handling to work).
-*/
-void luaE_checkcstack (lua_State *L) {
-  if (getCcalls(L) == LUAI_MAXCCALLS)
-    luaG_runerror(L, "C stack overflow");
-  else if (getCcalls(L) >= (LUAI_MAXCCALLS / 10 * 11))
-    luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */
-}
-
-
-LUAI_FUNC void luaE_incCstack (lua_State *L) {
-  L->nCcalls++;
-  if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
-    luaE_checkcstack(L);
-}
-
-
 static void stack_init (lua_State *L1, lua_State *L) {
   int i; CallInfo *ci;
   /* initialize stack array */
-  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue);
-  L1->tbclist = L1->stack;
-  for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++)
-    setnilvalue(s2v(L1->stack + i));  /* erase new stack */
+  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE, TValue);
+  L1->stacksize = BASIC_STACK_SIZE;
+  for (i = 0; i < BASIC_STACK_SIZE; i++)
+    setnilvalue(L1->stack + i);  /* erase new stack */
   L1->top = L1->stack;
-  L1->stack_last = L1->stack + BASIC_STACK_SIZE;
+  L1->stack_last = L1->stack + L1->stacksize - EXTRA_STACK;
   /* initialize first ci */
   ci = &L1->base_ci;
   ci->next = ci->previous = NULL;
-  ci->callstatus = CIST_C;
+  ci->callstatus = 0;
   ci->func = L1->top;
-  ci->u.c.k = NULL;
-  ci->nresults = 0;
-  setnilvalue(s2v(L1->top));  /* 'function' entry for this 'ci' */
-  L1->top++;
+  setnilvalue(L1->top++);  /* 'function' entry for this 'ci' */
   ci->top = L1->top + LUA_MINSTACK;
   L1->ci = ci;
 }
@@ -206,7 +174,7 @@ static void freestack (lua_State *L) {
   L->ci = &L->base_ci;  /* free the entire 'ci' list */
   luaE_freeCI(L);
   lua_assert(L->nci == 0);
-  luaM_freearray(L, L->stack, stacksize(L) + EXTRA_STACK);  /* free stack */
+  luaM_freearray(L, L->stack, L->stacksize);  /* free stack array */
 }
 
 
@@ -214,19 +182,23 @@ static void freestack (lua_State *L) {
 ** Create registry table and its predefined values
 */
 static void init_registry (lua_State *L, global_State *g) {
+  TValue temp;
   /* create registry */
   Table *registry = luaH_new(L);
   sethvalue(L, &g->l_registry, registry);
   luaH_resize(L, registry, LUA_RIDX_LAST, 0);
   /* registry[LUA_RIDX_MAINTHREAD] = L */
-  setthvalue(L, &registry->array[LUA_RIDX_MAINTHREAD - 1], L);
-  /* registry[LUA_RIDX_GLOBALS] = new table (table of globals) */
-  sethvalue(L, &registry->array[LUA_RIDX_GLOBALS - 1], luaH_new(L));
+  setthvalue(L, &temp, L);  /* temp = L */
+  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &temp);
+  /* registry[LUA_RIDX_GLOBALS] = table of globals */
+  sethvalue(L, &temp, luaH_new(L));  /* temp = new table (global table) */
+  luaH_setint(L, registry, LUA_RIDX_GLOBALS, &temp);
 }
 
 
 /*
 ** open parts of the state that may cause memory-allocation errors.
+** ('g->version' != NULL flags that the state was completely build)
 */
 static void f_luaopen (lua_State *L, void *ud) {
   global_State *g = G(L);
@@ -237,7 +209,7 @@ static void f_luaopen (lua_State *L, void *ud) {
   luaT_init(L);
   luaX_init(L);
   g->gcrunning = 1;  /* allow gc */
-  setnilvalue(&g->nilvalue);  /* now state is complete */
+  g->version = lua_version(NULL);
   luai_userstateopen(L);
 }
 
@@ -251,30 +223,28 @@ static void preinit_thread (lua_State *L, global_State *g) {
   L->stack = NULL;
   L->ci = NULL;
   L->nci = 0;
+  L->stacksize = 0;
   L->twups = L;  /* thread has no upvalues */
-  L->nCcalls = 0;
   L->errorJmp = NULL;
+  L->nCcalls = 0;
   L->hook = NULL;
   L->hookmask = 0;
   L->basehookcount = 0;
   L->allowhook = 1;
   resethookcount(L);
   L->openupval = NULL;
+  L->nny = 1;
   L->status = LUA_OK;
   L->errfunc = 0;
-  L->oldpc = 0;
 }
 
 
 static void close_state (lua_State *L) {
   global_State *g = G(L);
-  if (!completestate(g))  /* closing a partially built state? */
-    luaC_freeallobjects(L);  /* jucst collect its objects */
-  else {  /* closing a fully built state */
-    luaD_closeprotected(L, 1, LUA_OK);  /* close all upvalues */
-    luaC_freeallobjects(L);  /* collect all objects */
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
+  luaC_freeallobjects(L);  /* collect all objects */
+  if (g->version)  /* closing a fully built state? */
     luai_userstateclose(L);
-  }
   luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
   freestack(L);
   lua_assert(gettotalbytes(g) == sizeof(LG));
@@ -283,20 +253,19 @@ static void close_state (lua_State *L) {
 
 
 LUA_API lua_State *lua_newthread (lua_State *L) {
-  global_State *g;
+  global_State *g = G(L);
   lua_State *L1;
   lua_lock(L);
-  g = G(L);
   luaC_checkGC(L);
   /* create new thread */
   L1 = &cast(LX *, luaM_newobject(L, LUA_TTHREAD, sizeof(LX)))->l;
   L1->marked = luaC_white(g);
-  L1->tt = LUA_VTHREAD;
+  L1->tt = LUA_TTHREAD;
   /* link it on list 'allgc' */
   L1->next = g->allgc;
   g->allgc = obj2gco(L1);
   /* anchor it on L stack */
-  setthvalue2s(L, L->top, L1);
+  setthvalue(L, L->top, L1);
   api_incr_top(L);
   preinit_thread(L1, g);
   L1->hookmask = L->hookmask;
@@ -315,7 +284,7 @@ LUA_API lua_State *lua_newthread (lua_State *L) {
 
 void luaE_freethread (lua_State *L, lua_State *L1) {
   LX *l = fromstate(L1);
-  luaF_closeupval(L1, L1->stack);  /* close all upvalues */
+  luaF_close(L1, L1->stack);  /* close all upvalues for this thread */
   lua_assert(L1->openupval == NULL);
   luai_userstatefree(L, L1);
   freestack(L1);
@@ -323,34 +292,6 @@ void luaE_freethread (lua_State *L, lua_State *L1) {
 }
 
 
-int luaE_resetthread (lua_State *L, int status) {
-  CallInfo *ci = L->ci = &L->base_ci;  /* unwind CallInfo list */
-  setnilvalue(s2v(L->stack));  /* 'function' entry for basic 'ci' */
-  ci->func = L->stack;
-  ci->callstatus = CIST_C;
-  if (status == LUA_YIELD)
-    status = LUA_OK;
-  status = luaD_closeprotected(L, 1, status);
-  if (status != LUA_OK)  /* errors? */
-    luaD_seterrorobj(L, status, L->stack + 1);
-  else
-    L->top = L->stack + 1;
-  ci->top = L->top + LUA_MINSTACK;
-  L->status = cast_byte(status);
-  luaD_reallocstack(L, cast_int(ci->top - L->stack), 0);
-  return status;
-}
-
-
-LUA_API int lua_resetthread (lua_State *L) {
-  int status;
-  lua_lock(L);
-  status = luaE_resetthread(L, L->status);
-  lua_unlock(L);
-  return status;
-}
-
-
 LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   int i;
   lua_State *L;
@@ -359,44 +300,34 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   if (l == NULL) return NULL;
   L = &l->l.l;
   g = &l->g;
-  L->tt = LUA_VTHREAD;
+  L->next = NULL;
+  L->tt = LUA_TTHREAD;
   g->currentwhite = bitmask(WHITE0BIT);
   L->marked = luaC_white(g);
   preinit_thread(L, g);
-  g->allgc = obj2gco(L);  /* by now, only object is the main thread */
-  L->next = NULL;
-  incnny(L);  /* main thread is always non yieldable */
   g->frealloc = f;
   g->ud = ud;
-  g->warnf = NULL;
-  g->ud_warn = NULL;
   g->mainthread = L;
-  g->seed = luai_makeseed(L);
+  g->seed = makeseed(L);
   g->gcrunning = 0;  /* no GC while building state */
+  g->GCestimate = 0;
   g->strt.size = g->strt.nuse = 0;
   g->strt.hash = NULL;
   setnilvalue(&g->l_registry);
   g->panic = NULL;
+  g->version = NULL;
   g->gcstate = GCSpause;
-  g->gckind = KGC_INC;
-  g->gcstopem = 0;
-  g->gcemergency = 0;
-  g->finobj = g->tobefnz = g->fixedgc = NULL;
-  g->firstold1 = g->survival = g->old1 = g->reallyold = NULL;
-  g->finobjsur = g->finobjold1 = g->finobjrold = NULL;
+  g->gckind = KGC_NORMAL;
+  g->allgc = g->finobj = g->tobefnz = g->fixedgc = NULL;
   g->sweepgc = NULL;
   g->gray = g->grayagain = NULL;
   g->weak = g->ephemeron = g->allweak = NULL;
   g->twups = NULL;
   g->totalbytes = sizeof(LG);
   g->GCdebt = 0;
-  g->lastatomic = 0;
-  setivalue(&g->nilvalue, 0);  /* to signal that state is not yet built */
-  setgcparam(g->gcpause, LUAI_GCPAUSE);
-  setgcparam(g->gcstepmul, LUAI_GCMUL);
-  g->gcstepsize = LUAI_GCSTEPSIZE;
-  setgcparam(g->genmajormul, LUAI_GENMAJORMUL);
-  g->genminormul = LUAI_GENMINORMUL;
+  g->gcfinnum = 0;
+  g->gcpause = LUAI_GCPAUSE;
+  g->gcstepmul = LUAI_GCMUL;
   for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
   if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
     /* memory allocation error: free partial state */
@@ -408,32 +339,9 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
 
 
 LUA_API void lua_close (lua_State *L) {
-  lua_lock(L);
   L = G(L)->mainthread;  /* only the main thread can be closed */
+  lua_lock(L);
   close_state(L);
 }
 
 
-void luaE_warning (lua_State *L, const char *msg, int tocont) {
-  lua_WarnFunction wf = G(L)->warnf;
-  if (wf != NULL)
-    wf(G(L)->ud_warn, msg, tocont);
-}
-
-
-/*
-** Generate a warning from an error message
-*/
-void luaE_warnerror (lua_State *L, const char *where) {
-  TValue *errobj = s2v(L->top - 1);  /* error object */
-  const char *msg = (ttisstring(errobj))
-                  ? svalue(errobj)
-                  : "error object is not a string";
-  /* produce warning "error in %s (%s)" (where, msg) */
-  luaE_warning(L, "error in ", 1);
-  luaE_warning(L, where, 1);
-  luaE_warning(L, " (", 1);
-  luaE_warning(L, msg, 1);
-  luaE_warning(L, ")", 0);
-}
-

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h $
+** $Id: lstate.h,v 2.133.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -15,6 +15,7 @@
 
 
 /*
+
 ** Some notes about garbage-collected objects: All objects in Lua must
 ** be kept somehow accessible until being freed, so all objects always
 ** belong to one (and only one) of these lists, using field 'next' of
@@ -26,44 +27,12 @@
 ** 'fixedgc': all objects that are not to be collected (currently
 ** only small strings, such as reserved words).
 **
-** For the generational collector, some of these lists have marks for
-** generations. Each mark points to the first element in the list for
-** that particular generation; that generation goes until the next mark.
-**
-** 'allgc' -> 'survival': new objects;
-** 'survival' -> 'old': objects that survived one collection;
-** 'old1' -> 'reallyold': objects that became old in last collection;
-** 'reallyold' -> NULL: objects old for more than one cycle.
-**
-** 'finobj' -> 'finobjsur': new objects marked for finalization;
-** 'finobjsur' -> 'finobjold1': survived   """";
-** 'finobjold1' -> 'finobjrold': just old  """";
-** 'finobjrold' -> NULL: really old       """".
-**
-** All lists can contain elements older than their main ages, due
-** to 'luaC_checkfinalizer' and 'udata2finalize', which move
-** objects between the normal lists and the "marked for finalization"
-** lists. Moreover, barriers can age young objects in young lists as
-** OLD0, which then become OLD1. However, a list never contains
-** elements younger than their main ages.
-**
-** The generational collector also uses a pointer 'firstold1', which
-** points to the first OLD1 object in the list. It is used to optimize
-** 'markold'. (Potentially OLD1 objects can be anywhere between 'allgc'
-** and 'reallyold', but often the list has no OLD1 objects or they are
-** after 'old1'.) Note the difference between it and 'old1':
-** 'firstold1': no OLD1 objects before this point; there can be all
-**   ages after it.
-** 'old1': no objects younger than OLD1 after this point.
-*/
-
-/*
 ** Moreover, there is another set of lists that control gray objects.
 ** These lists are linked by fields 'gclist'. (All objects that
 ** can become gray have such a field. The field is not the same
 ** in all objects, but it always has this name.)  Any gray object
 ** must belong to one of these lists, and all objects in these lists
-** must be gray (with two exceptions explained below):
+** must be gray:
 **
 ** 'gray': regular gray objects, still waiting to be visited.
 ** 'grayagain': objects that must be revisited at the atomic phase.
@@ -74,46 +43,11 @@
 ** 'weak': tables with weak values to be cleared;
 ** 'ephemeron': ephemeron tables with white->white entries;
 ** 'allweak': tables with weak keys and/or weak values to be cleared.
-**
-** The exceptions to that "gray rule" are:
-** - TOUCHED2 objects in generational mode stay in a gray list (because
-** they must be visited again at the end of the cycle), but they are
-** marked black because assignments to them must activate barriers (to
-** move them back to TOUCHED1).
-** - Open upvales are kept gray to avoid barriers, but they stay out
-** of gray lists. (They don't even have a 'gclist' field.)
+** The last three lists are used only during the atomic phase.
+
 */
 
 
-
-/*
-** About 'nCcalls':  This count has two parts: the lower 16 bits counts
-** the number of recursive invocations in the C stack; the higher
-** 16 bits counts the number of non-yieldable calls in the stack.
-** (They are together so that we can change and save both with one
-** instruction.)
-*/
-
-
-/* true if this thread does not have non-yieldable calls in the stack */
-#define yieldable(L)		(((L)->nCcalls & 0xffff0000) == 0)
-
-/* real number of C calls */
-#define getCcalls(L)	((L)->nCcalls & 0xffff)
-
-
-/* Increment the number of non-yieldable calls */
-#define incnny(L)	((L)->nCcalls += 0x10000)
-
-/* Decrement the number of non-yieldable calls */
-#define decnny(L)	((L)->nCcalls -= 0x10000)
-
-/* Non-yieldable call increment */
-#define nyci	(0x10000 | 1)
-
-
-
-
 struct lua_longjmp;  /* defined in ldo.c */
 
 
@@ -127,24 +61,16 @@ struct lua_longjmp;  /* defined in ldo.c */
 #endif
 
 
-/*
-** Extra stack space to handle TM calls and some other extras. This
-** space is not included in 'stack_last'. It is used only to avoid stack
-** checks, either because the element will be promptly popped or because
-** there will be a stack check soon after the push. Function frames
-** never use this extra space, so it does not need to be kept clean.
-*/
+/* extra stack space to handle TM calls and some other extras */
 #define EXTRA_STACK   5
 
 
 #define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
 
-#define stacksize(th)	cast_int((th)->stack_last - (th)->stack)
-
 
 /* kinds of Garbage Collection */
-#define KGC_INC		0	/* incremental gc */
-#define KGC_GEN		1	/* generational gc */
+#define KGC_NORMAL	0
+#define KGC_EMERGENCY	1	/* gc was forced by an allocation failure */
 
 
 typedef struct stringtable {
@@ -156,18 +82,12 @@ typedef struct stringtable {
 
 /*
 ** Information about a call.
-** About union 'u':
-** - field 'l' is used only for Lua functions;
-** - field 'c' is used only for C functions.
-** About union 'u2':
-** - field 'funcidx' is used only by C functions while doing a
-** protected call;
-** - field 'nyield' is used only while a function is "doing" an
-** yield (from the yield until the next resume);
-** - field 'nres' is used only while closing tbc variables when
-** returning from a C function;
-** - field 'transferinfo' is used only during call/returnhooks,
-** before the function starts or after it ends.
+** When a thread yields, 'func' is adjusted to pretend that the
+** top function has only the yielded values in its stack; in that
+** case, the actual 'func' value is saved in field 'extra'.
+** When a function calls another with a continuation, 'extra' keeps
+** the function index so that, in case of errors, the continuation
+** function can be called with the correct top.
 */
 typedef struct CallInfo {
   StkId func;  /* function index in the stack */
@@ -175,9 +95,8 @@ typedef struct CallInfo {
   struct CallInfo *previous, *next;  /* dynamic call link */
   union {
     struct {  /* only for Lua functions */
+      StkId base;  /* base for this function */
       const Instruction *savedpc;
-      volatile l_signalT trap;
-      int nextraargs;  /* # of extra arguments in vararg functions */
     } l;
     struct {  /* only for C functions */
       lua_KFunction k;  /* continuation in case of yields */
@@ -185,15 +104,7 @@ typedef struct CallInfo {
       lua_KContext ctx;  /* context info. in case of yields */
     } c;
   } u;
-  union {
-    int funcidx;  /* called-function index */
-    int nyield;  /* number of values yielded */
-    int nres;  /* number of values returned */
-    struct {  /* info about transferred values (for call/return hooks) */
-      unsigned short ftransfer;  /* offset of first value transferred */
-      unsigned short ntransfer;  /* number of values transferred */
-    } transferinfo;
-  } u2;
+  ptrdiff_t extra;
   short nresults;  /* expected number of results from this function */
   unsigned short callstatus;
 } CallInfo;
@@ -203,40 +114,17 @@ typedef struct CallInfo {
 ** Bits in CallInfo status
 */
 #define CIST_OAH	(1<<0)	/* original value of 'allowhook' */
-#define CIST_C		(1<<1)	/* call is running a C function */
-#define CIST_FRESH	(1<<2)	/* call is on a fresh "luaV_execute" frame */
-#define CIST_HOOKED	(1<<3)	/* call is running a debug hook */
-#define CIST_YPCALL	(1<<4)	/* doing a yieldable protected call */
+#define CIST_LUA	(1<<1)	/* call is running a Lua function */
+#define CIST_HOOKED	(1<<2)	/* call is running a debug hook */
+#define CIST_FRESH	(1<<3)	/* call is running on a fresh invocation
+                                   of luaV_execute */
+#define CIST_YPCALL	(1<<4)	/* call is a yieldable protected call */
 #define CIST_TAIL	(1<<5)	/* call was tail called */
 #define CIST_HOOKYIELD	(1<<6)	/* last hook called yielded */
-#define CIST_FIN	(1<<7)	/* call is running a finalizer */
-#define CIST_TRAN	(1<<8)	/* 'ci' has transfer information */
-#define CIST_CLSRET	(1<<9)  /* function is closing tbc variables */
-/* Bits 10-12 are used for CIST_RECST (see below) */
-#define CIST_RECST	10
-#if defined(LUA_COMPAT_LT_LE)
-#define CIST_LEQ	(1<<13)  /* using __lt for __le */
-#endif
+#define CIST_LEQ	(1<<7)  /* using __lt for __le */
+#define CIST_FIN	(1<<8)  /* call is running a finalizer */
 
-
-/*
-** Field CIST_RECST stores the "recover status", used to keep the error
-** status while closing to-be-closed variables in coroutines, so that
-** Lua can correctly resume after an yield from a __close method called
-** because of an error.  (Three bits are enough for error status.)
-*/
-#define getcistrecst(ci)     (((ci)->callstatus >> CIST_RECST) & 7)
-#define setcistrecst(ci,st)  \
-  check_exp(((st) & 7) == (st),   /* status must fit in three bits */  \
-            ((ci)->callstatus = ((ci)->callstatus & ~(7 << CIST_RECST))  \
-                                                  | ((st) << CIST_RECST)))
-
-
-/* active function is a Lua function */
-#define isLua(ci)	(!((ci)->callstatus & CIST_C))
-
-/* call is running Lua code (not a hook) */
-#define isLuacode(ci)	(!((ci)->callstatus & (CIST_C | CIST_HOOKED)))
+#define isLua(ci)	((ci)->callstatus & CIST_LUA)
 
 /* assume that CIST_OAH has offset 0 and that 'v' is strictly 0/1 */
 #define setoah(st,v)	((st) = ((st) & ~CIST_OAH) | (v))
@@ -251,23 +139,15 @@ typedef struct global_State {
   void *ud;         /* auxiliary data to 'frealloc' */
   l_mem totalbytes;  /* number of bytes currently allocated - GCdebt */
   l_mem GCdebt;  /* bytes allocated not yet compensated by the collector */
+  lu_mem GCmemtrav;  /* memory traversed by the GC */
   lu_mem GCestimate;  /* an estimate of the non-garbage memory in use */
-  lu_mem lastatomic;  /* see function 'genstep' in file 'lgc.c' */
   stringtable strt;  /* hash table for strings */
   TValue l_registry;
-  TValue nilvalue;  /* a nil value */
   unsigned int seed;  /* randomized seed for hashes */
   lu_byte currentwhite;
   lu_byte gcstate;  /* state of garbage collector */
   lu_byte gckind;  /* kind of GC running */
-  lu_byte gcstopem;  /* stops emergency collections */
-  lu_byte genminormul;  /* control for minor generational collections */
-  lu_byte genmajormul;  /* control for major generational collections */
   lu_byte gcrunning;  /* true if GC is running */
-  lu_byte gcemergency;  /* true if this is an emergency collection */
-  lu_byte gcpause;  /* size of pause between successive GCs */
-  lu_byte gcstepmul;  /* GC "speed" */
-  lu_byte gcstepsize;  /* (log2 of) GC granularity */
   GCObject *allgc;  /* list of all collectable objects */
   GCObject **sweepgc;  /* current position of sweep in list */
   GCObject *finobj;  /* list of collectable objects with finalizers */
@@ -278,23 +158,17 @@ typedef struct global_State {
   GCObject *allweak;  /* list of all-weak tables */
   GCObject *tobefnz;  /* list of userdata to be GC */
   GCObject *fixedgc;  /* list of objects not to be collected */
-  /* fields for generational collector */
-  GCObject *survival;  /* start of objects that survived one GC cycle */
-  GCObject *old1;  /* start of old1 objects */
-  GCObject *reallyold;  /* objects more than one cycle old ("really old") */
-  GCObject *firstold1;  /* first OLD1 object in the list (if any) */
-  GCObject *finobjsur;  /* list of survival objects with finalizers */
-  GCObject *finobjold1;  /* list of old1 objects with finalizers */
-  GCObject *finobjrold;  /* list of really old objects with finalizers */
   struct lua_State *twups;  /* list of threads with open upvalues */
+  unsigned int gcfinnum;  /* number of finalizers to call in each GC step */
+  int gcpause;  /* size of pause between successive GCs */
+  int gcstepmul;  /* GC 'granularity' */
   lua_CFunction panic;  /* to be called in unprotected errors */
   struct lua_State *mainthread;
-  TString *memerrmsg;  /* message for memory-allocation errors */
+  const lua_Number *version;  /* pointer to version number */
+  TString *memerrmsg;  /* memory-error message */
   TString *tmname[TM_N];  /* array with tag-method names */
   struct Table *mt[LUA_NUMTAGS];  /* metatables for basic types */
   TString *strcache[STRCACHE_N][STRCACHE_M];  /* cache for strings in API */
-  lua_WarnFunction warnf;  /* warning function */
-  void *ud_warn;         /* auxiliary data to 'warnf' */
 } global_State;
 
 
@@ -303,47 +177,36 @@ typedef struct global_State {
 */
 struct lua_State {
   CommonHeader;
-  lu_byte status;
-  lu_byte allowhook;
   unsigned short nci;  /* number of items in 'ci' list */
+  lu_byte status;
   StkId top;  /* first free slot in the stack */
   global_State *l_G;
   CallInfo *ci;  /* call info for current function */
-  StkId stack_last;  /* end of stack (last element + 1) */
+  const Instruction *oldpc;  /* last pc traced */
+  StkId stack_last;  /* last free slot in the stack */
   StkId stack;  /* stack base */
   UpVal *openupval;  /* list of open upvalues in this stack */
-  StkId tbclist;  /* list of to-be-closed variables */
   GCObject *gclist;
   struct lua_State *twups;  /* list of threads with open upvalues */
   struct lua_longjmp *errorJmp;  /* current error recover point */
   CallInfo base_ci;  /* CallInfo for first level (C calling Lua) */
   volatile lua_Hook hook;
   ptrdiff_t errfunc;  /* current error handling function (stack index) */
-  l_uint32 nCcalls;  /* number of nested (non-yieldable | C)  calls */
-  int oldpc;  /* last pc traced */
+  int stacksize;
   int basehookcount;
   int hookcount;
-  volatile l_signalT hookmask;
+  unsigned short nny;  /* number of non-yieldable calls in stack */
+  unsigned short nCcalls;  /* number of nested C calls */
+  l_signalT hookmask;
+  lu_byte allowhook;
 };
 
 
 #define G(L)	(L->l_G)
 
-/*
-** 'g->nilvalue' being a nil value flags that the state was completely
-** build.
-*/
-#define completestate(g)	ttisnil(&g->nilvalue)
-
 
 /*
 ** Union of all collectable objects (only for conversions)
-** ISO C99, 6.5.2.3 p.5:
-** "if a union contains several structures that share a common initial
-** sequence [...], and if the union object currently contains one
-** of these structures, it is permitted to inspect the common initial
-** part of any of them anywhere that a declaration of the complete type
-** of the union is visible."
 */
 union GCUnion {
   GCObject gc;  /* common header */
@@ -353,36 +216,27 @@ union GCUnion {
   struct Table h;
   struct Proto p;
   struct lua_State th;  /* thread */
-  struct UpVal upv;
 };
 
 
-/*
-** ISO C99, 6.7.2.1 p.14:
-** "A pointer to a union object, suitably converted, points to each of
-** its members [...], and vice versa."
-*/
 #define cast_u(o)	cast(union GCUnion *, (o))
 
 /* macros to convert a GCObject into a specific value */
 #define gco2ts(o)  \
 	check_exp(novariant((o)->tt) == LUA_TSTRING, &((cast_u(o))->ts))
-#define gco2u(o)  check_exp((o)->tt == LUA_VUSERDATA, &((cast_u(o))->u))
-#define gco2lcl(o)  check_exp((o)->tt == LUA_VLCL, &((cast_u(o))->cl.l))
-#define gco2ccl(o)  check_exp((o)->tt == LUA_VCCL, &((cast_u(o))->cl.c))
+#define gco2u(o)  check_exp((o)->tt == LUA_TUSERDATA, &((cast_u(o))->u))
+#define gco2lcl(o)  check_exp((o)->tt == LUA_TLCL, &((cast_u(o))->cl.l))
+#define gco2ccl(o)  check_exp((o)->tt == LUA_TCCL, &((cast_u(o))->cl.c))
 #define gco2cl(o)  \
 	check_exp(novariant((o)->tt) == LUA_TFUNCTION, &((cast_u(o))->cl))
-#define gco2t(o)  check_exp((o)->tt == LUA_VTABLE, &((cast_u(o))->h))
-#define gco2p(o)  check_exp((o)->tt == LUA_VPROTO, &((cast_u(o))->p))
-#define gco2th(o)  check_exp((o)->tt == LUA_VTHREAD, &((cast_u(o))->th))
-#define gco2upv(o)	check_exp((o)->tt == LUA_VUPVAL, &((cast_u(o))->upv))
+#define gco2t(o)  check_exp((o)->tt == LUA_TTABLE, &((cast_u(o))->h))
+#define gco2p(o)  check_exp((o)->tt == LUA_TPROTO, &((cast_u(o))->p))
+#define gco2th(o)  check_exp((o)->tt == LUA_TTHREAD, &((cast_u(o))->th))
 
 
-/*
-** macro to convert a Lua object into a GCObject
-** (The access to 'tt' tries to ensure that 'v' is actually a Lua object.)
-*/
-#define obj2gco(v)	check_exp((v)->tt >= LUA_TSTRING, &(cast_u(v)->gc))
+/* macro to convert a Lua object into a GCObject */
+#define obj2gco(v) \
+	check_exp(novariant((v)->tt) < LUA_TDEADKEY, (&(cast_u(v)->gc)))
 
 
 /* actual number of total bytes allocated */
@@ -393,11 +247,6 @@ LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
 LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
 LUAI_FUNC void luaE_freeCI (lua_State *L);
 LUAI_FUNC void luaE_shrinkCI (lua_State *L);
-LUAI_FUNC void luaE_checkcstack (lua_State *L);
-LUAI_FUNC void luaE_incCstack (lua_State *L);
-LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont);
-LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where);
-LUAI_FUNC int luaE_resetthread (lua_State *L, int status);
 
 
 #endif

lstring.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.c $
+** $Id: lstring.c,v 2.56.1.1 2017/04/19 17:20:42 roberto Exp $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -22,10 +22,16 @@
 #include "lstring.h"
 
 
+#define MEMERRMSG       "not enough memory"
+
+
 /*
-** Maximum size for string table.
+** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to
+** compute its hash
 */
-#define MAXSTRTB	cast_int(luaM_limitN(MAX_INT, TString*))
+#if !defined(LUAI_HASHLIMIT)
+#define LUAI_HASHLIMIT		5
+#endif
 
 
 /*
@@ -33,7 +39,7 @@
 */
 int luaS_eqlngstr (TString *a, TString *b) {
   size_t len = a->u.lnglen;
-  lua_assert(a->tt == LUA_VLNGSTR && b->tt == LUA_VLNGSTR);
+  lua_assert(a->tt == LUA_TLNGSTR && b->tt == LUA_TLNGSTR);
   return (a == b) ||  /* same instance or... */
     ((len == b->u.lnglen) &&  /* equal length and ... */
      (memcmp(getstr(a), getstr(b), len) == 0));  /* equal contents */
@@ -41,65 +47,52 @@ int luaS_eqlngstr (TString *a, TString *b) {
 
 
 unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
-  unsigned int h = seed ^ cast_uint(l);
-  for (; l > 0; l--)
+  unsigned int h = seed ^ cast(unsigned int, l);
+  size_t step = (l >> LUAI_HASHLIMIT) + 1;
+  for (; l >= step; l -= step)
     h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
   return h;
 }
 
 
 unsigned int luaS_hashlongstr (TString *ts) {
-  lua_assert(ts->tt == LUA_VLNGSTR);
+  lua_assert(ts->tt == LUA_TLNGSTR);
   if (ts->extra == 0) {  /* no hash? */
-    size_t len = ts->u.lnglen;
-    ts->hash = luaS_hash(getstr(ts), len, ts->hash);
+    ts->hash = luaS_hash(getstr(ts), ts->u.lnglen, ts->hash);
     ts->extra = 1;  /* now it has its hash */
   }
   return ts->hash;
 }
 
 
-static void tablerehash (TString **vect, int osize, int nsize) {
+/*
+** resizes the string table
+*/
+void luaS_resize (lua_State *L, int newsize) {
   int i;
-  for (i = osize; i < nsize; i++)  /* clear new elements */
-    vect[i] = NULL;
-  for (i = 0; i < osize; i++) {  /* rehash old part of the array */
-    TString *p = vect[i];
-    vect[i] = NULL;
-    while (p) {  /* for each string in the list */
+  stringtable *tb = &G(L)->strt;
+  if (newsize > tb->size) {  /* grow table if needed */
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
+    for (i = tb->size; i < newsize; i++)
+      tb->hash[i] = NULL;
+  }
+  for (i = 0; i < tb->size; i++) {  /* rehash */
+    TString *p = tb->hash[i];
+    tb->hash[i] = NULL;
+    while (p) {  /* for each node in the list */
       TString *hnext = p->u.hnext;  /* save next */
-      unsigned int h = lmod(p->hash, nsize);  /* new position */
-      p->u.hnext = vect[h];  /* chain it into array */
-      vect[h] = p;
+      unsigned int h = lmod(p->hash, newsize);  /* new position */
+      p->u.hnext = tb->hash[h];  /* chain it */
+      tb->hash[h] = p;
       p = hnext;
     }
   }
-}
-
-
-/*
-** Resize the string table. If allocation fails, keep the current size.
-** (This can degrade performance, but any non-zero size should work
-** correctly.)
-*/
-void luaS_resize (lua_State *L, int nsize) {
-  stringtable *tb = &G(L)->strt;
-  int osize = tb->size;
-  TString **newvect;
-  if (nsize < osize)  /* shrinking table? */
-    tablerehash(tb->hash, osize, nsize);  /* depopulate shrinking part */
-  newvect = luaM_reallocvector(L, tb->hash, osize, nsize, TString*);
-  if (l_unlikely(newvect == NULL)) {  /* reallocation failed? */
-    if (nsize < osize)  /* was it shrinking table? */
-      tablerehash(tb->hash, nsize, osize);  /* restore to original size */
-    /* leave table as it was */
-  }
-  else {  /* allocation succeeded */
-    tb->hash = newvect;
-    tb->size = nsize;
-    if (nsize > osize)
-      tablerehash(newvect, osize, nsize);  /* rehash for new size */
+  if (newsize < tb->size) {  /* shrink table if needed */
+    /* vanishing slice should be empty */
+    lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL);
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
   }
+  tb->size = newsize;
 }
 
 
@@ -111,8 +104,8 @@ void luaS_clearcache (global_State *g) {
   int i, j;
   for (i = 0; i < STRCACHE_N; i++)
     for (j = 0; j < STRCACHE_M; j++) {
-      if (iswhite(g->strcache[i][j]))  /* will entry be collected? */
-        g->strcache[i][j] = g->memerrmsg;  /* replace it with something fixed */
+    if (iswhite(g->strcache[i][j]))  /* will entry be collected? */
+      g->strcache[i][j] = g->memerrmsg;  /* replace it with something fixed */
     }
 }
 
@@ -123,10 +116,7 @@ void luaS_clearcache (global_State *g) {
 void luaS_init (lua_State *L) {
   global_State *g = G(L);
   int i, j;
-  stringtable *tb = &G(L)->strt;
-  tb->hash = luaM_newvector(L, MINSTRTABSIZE, TString*);
-  tablerehash(tb->hash, 0, MINSTRTABSIZE);  /* clear array */
-  tb->size = MINSTRTABSIZE;
+  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */
   /* pre-create memory-error message */
   g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
   luaC_fix(L, obj2gco(g->memerrmsg));  /* it should never be collected */
@@ -155,7 +145,7 @@ static TString *createstrobj (lua_State *L, size_t l, int tag, unsigned int h) {
 
 
 TString *luaS_createlngstrobj (lua_State *L, size_t l) {
-  TString *ts = createstrobj(L, l, LUA_VLNGSTR, G(L)->seed);
+  TString *ts = createstrobj(L, l, LUA_TLNGSTR, G(L)->seed);
   ts->u.lnglen = l;
   return ts;
 }
@@ -171,46 +161,34 @@ void luaS_remove (lua_State *L, TString *ts) {
 }
 
 
-static void growstrtab (lua_State *L, stringtable *tb) {
-  if (l_unlikely(tb->nuse == MAX_INT)) {  /* too many strings? */
-    luaC_fullgc(L, 1);  /* try to free some... */
-    if (tb->nuse == MAX_INT)  /* still too many? */
-      luaM_error(L);  /* cannot even create a message... */
-  }
-  if (tb->size <= MAXSTRTB / 2)  /* can grow string table? */
-    luaS_resize(L, tb->size * 2);
-}
-
-
 /*
-** Checks whether short string exists and reuses it or creates a new one.
+** checks whether short string exists and reuses it or creates a new one
 */
 static TString *internshrstr (lua_State *L, const char *str, size_t l) {
   TString *ts;
   global_State *g = G(L);
-  stringtable *tb = &g->strt;
   unsigned int h = luaS_hash(str, l, g->seed);
-  TString **list = &tb->hash[lmod(h, tb->size)];
+  TString **list = &g->strt.hash[lmod(h, g->strt.size)];
   lua_assert(str != NULL);  /* otherwise 'memcmp'/'memcpy' are undefined */
   for (ts = *list; ts != NULL; ts = ts->u.hnext) {
-    if (l == ts->shrlen && (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
+    if (l == ts->shrlen &&
+        (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
       /* found! */
       if (isdead(g, ts))  /* dead (but not collected yet)? */
         changewhite(ts);  /* resurrect it */
       return ts;
     }
   }
-  /* else must create a new string */
-  if (tb->nuse >= tb->size) {  /* need to grow string table? */
-    growstrtab(L, tb);
-    list = &tb->hash[lmod(h, tb->size)];  /* rehash with new size */
+  if (g->strt.nuse >= g->strt.size && g->strt.size <= MAX_INT/2) {
+    luaS_resize(L, g->strt.size * 2);
+    list = &g->strt.hash[lmod(h, g->strt.size)];  /* recompute with new size */
   }
-  ts = createstrobj(L, l, LUA_VSHRSTR, h);
+  ts = createstrobj(L, l, LUA_TSHRSTR, h);
   memcpy(getstr(ts), str, l * sizeof(char));
   ts->shrlen = cast_byte(l);
   ts->u.hnext = *list;
   *list = ts;
-  tb->nuse++;
+  g->strt.nuse++;
   return ts;
 }
 
@@ -223,7 +201,7 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
     return internshrstr(L, str, l);
   else {
     TString *ts;
-    if (l_unlikely(l >= (MAX_SIZE - sizeof(TString))/sizeof(char)))
+    if (l >= (MAX_SIZE - sizeof(TString))/sizeof(char))
       luaM_toobig(L);
     ts = luaS_createlngstrobj(L, l);
     memcpy(getstr(ts), str, l * sizeof(char));
@@ -255,19 +233,16 @@ TString *luaS_new (lua_State *L, const char *str) {
 }
 
 
-Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue) {
+Udata *luaS_newudata (lua_State *L, size_t s) {
   Udata *u;
-  int i;
   GCObject *o;
-  if (l_unlikely(s > MAX_SIZE - udatamemoffset(nuvalue)))
+  if (s > MAX_SIZE - sizeof(Udata))
     luaM_toobig(L);
-  o = luaC_newobj(L, LUA_VUSERDATA, sizeudata(nuvalue, s));
+  o = luaC_newobj(L, LUA_TUSERDATA, sizeludata(s));
   u = gco2u(o);
   u->len = s;
-  u->nuvalue = nuvalue;
   u->metatable = NULL;
-  for (i = 0; i < nuvalue; i++)
-    setnilvalue(&u->uv[i].uv);
+  setuservalue(L, u, luaO_nilobject);
   return u;
 }
 

lstring.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.h $
+** $Id: lstring.h,v 1.61.1.1 2017/04/19 17:20:42 roberto Exp $
 ** String table (keep all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,18 +12,10 @@
 #include "lstate.h"
 
 
-/*
-** Memory-allocation error message must be preallocated (it cannot
-** be created after memory is exhausted)
-*/
-#define MEMERRMSG       "not enough memory"
+#define sizelstring(l)  (sizeof(union UTString) + ((l) + 1) * sizeof(char))
 
-
-/*
-** Size of a TString: Size of the header plus space for the string
-** itself (including final '\0').
-*/
-#define sizelstring(l)  (offsetof(TString, contents) + ((l) + 1) * sizeof(char))
+#define sizeludata(l)	(sizeof(union UUdata) + (l))
+#define sizeudata(u)	sizeludata((u)->len)
 
 #define luaS_newliteral(L, s)	(luaS_newlstr(L, "" s, \
                                  (sizeof(s)/sizeof(char))-1))
@@ -32,13 +24,13 @@
 /*
 ** test whether a string is a reserved word
 */
-#define isreserved(s)	((s)->tt == LUA_VSHRSTR && (s)->extra > 0)
+#define isreserved(s)	((s)->tt == LUA_TSHRSTR && (s)->extra > 0)
 
 
 /*
 ** equality for short strings, which are always internalized
 */
-#define eqshrstr(a,b)	check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
+#define eqshrstr(a,b)	check_exp((a)->tt == LUA_TSHRSTR, (a) == (b))
 
 
 LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
@@ -48,7 +40,7 @@ LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
 LUAI_FUNC void luaS_clearcache (global_State *g);
 LUAI_FUNC void luaS_init (lua_State *L);
 LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
-LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue);
+LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s);
 LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
 LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
 LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);

lstrlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c $
+** $Id: lstrlib.c,v 1.254.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -14,7 +14,6 @@
 #include <float.h>
 #include <limits.h>
 #include <locale.h>
-#include <math.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -60,50 +59,23 @@ static int str_len (lua_State *L) {
 }
 
 
-/*
-** translate a relative initial string position
-** (negative means back from end): clip result to [1, inf).
-** The length of any string in Lua must fit in a lua_Integer,
-** so there are no overflows in the casts.
-** The inverted comparison avoids a possible overflow
-** computing '-pos'.
-*/
-static size_t posrelatI (lua_Integer pos, size_t len) {
-  if (pos > 0)
-    return (size_t)pos;
-  else if (pos == 0)
-    return 1;
-  else if (pos < -(lua_Integer)len)  /* inverted comparison */
-    return 1;  /* clip to 1 */
-  else return len + (size_t)pos + 1;
-}
-
-
-/*
-** Gets an optional ending string position from argument 'arg',
-** with default value 'def'.
-** Negative means back from end: clip result to [0, len]
-*/
-static size_t getendpos (lua_State *L, int arg, lua_Integer def,
-                         size_t len) {
-  lua_Integer pos = luaL_optinteger(L, arg, def);
-  if (pos > (lua_Integer)len)
-    return len;
-  else if (pos >= 0)
-    return (size_t)pos;
-  else if (pos < -(lua_Integer)len)
-    return 0;
-  else return len + (size_t)pos + 1;
+/* translate a relative string position: negative means back from end */
+static lua_Integer posrelat (lua_Integer pos, size_t len) {
+  if (pos >= 0) return pos;
+  else if (0u - (size_t)pos > len) return 0;
+  else return (lua_Integer)len + pos + 1;
 }
 
 
 static int str_sub (lua_State *L) {
   size_t l;
   const char *s = luaL_checklstring(L, 1, &l);
-  size_t start = posrelatI(luaL_checkinteger(L, 2), l);
-  size_t end = getendpos(L, 3, -1, l);
+  lua_Integer start = posrelat(luaL_checkinteger(L, 2), l);
+  lua_Integer end = posrelat(luaL_optinteger(L, 3, -1), l);
+  if (start < 1) start = 1;
+  if (end > (lua_Integer)l) end = l;
   if (start <= end)
-    lua_pushlstring(L, s + start - 1, (end - start) + 1);
+    lua_pushlstring(L, s + start - 1, (size_t)(end - start) + 1);
   else lua_pushliteral(L, "");
   return 1;
 }
@@ -152,9 +124,8 @@ static int str_rep (lua_State *L) {
   const char *s = luaL_checklstring(L, 1, &l);
   lua_Integer n = luaL_checkinteger(L, 2);
   const char *sep = luaL_optlstring(L, 3, "", &lsep);
-  if (n <= 0)
-    lua_pushliteral(L, "");
-  else if (l_unlikely(l + lsep < l || l + lsep > MAXSIZE / n))
+  if (n <= 0) lua_pushliteral(L, "");
+  else if (l + lsep < l || l + lsep > MAXSIZE / n)  /* may overflow? */
     return luaL_error(L, "resulting string too large");
   else {
     size_t totallen = (size_t)n * l + (size_t)(n - 1) * lsep;
@@ -177,12 +148,13 @@ static int str_rep (lua_State *L) {
 static int str_byte (lua_State *L) {
   size_t l;
   const char *s = luaL_checklstring(L, 1, &l);
-  lua_Integer pi = luaL_optinteger(L, 2, 1);
-  size_t posi = posrelatI(pi, l);
-  size_t pose = getendpos(L, 3, pi, l);
+  lua_Integer posi = posrelat(luaL_optinteger(L, 2, 1), l);
+  lua_Integer pose = posrelat(luaL_optinteger(L, 3, posi), l);
   int n, i;
+  if (posi < 1) posi = 1;
+  if (pose > (lua_Integer)l) pose = l;
   if (posi > pose) return 0;  /* empty interval; return no values */
-  if (l_unlikely(pose - posi >= (size_t)INT_MAX))  /* arithmetic overflow? */
+  if (pose - posi >= INT_MAX)  /* arithmetic overflow? */
     return luaL_error(L, "string slice too long");
   n = (int)(pose -  posi) + 1;
   luaL_checkstack(L, n, "string slice too long");
@@ -198,8 +170,8 @@ static int str_char (lua_State *L) {
   luaL_Buffer b;
   char *p = luaL_buffinitsize(L, &b, n);
   for (i=1; i<=n; i++) {
-    lua_Unsigned c = (lua_Unsigned)luaL_checkinteger(L, i);
-    luaL_argcheck(L, c <= (lua_Unsigned)UCHAR_MAX, i, "value out of range");
+    lua_Integer c = luaL_checkinteger(L, i);
+    luaL_argcheck(L, uchar(c) == c, i, "value out of range");
     p[i - 1] = uchar(c);
   }
   luaL_pushresultsize(&b, n);
@@ -207,143 +179,27 @@ static int str_char (lua_State *L) {
 }
 
 
-/*
-** Buffer to store the result of 'string.dump'. It must be initialized
-** after the call to 'lua_dump', to ensure that the function is on the
-** top of the stack when 'lua_dump' is called. ('luaL_buffinit' might
-** push stuff.)
-*/
-struct str_Writer {
-  int init;  /* true iff buffer has been initialized */
-  luaL_Buffer B;
-};
-
-
-static int writer (lua_State *L, const void *b, size_t size, void *ud) {
-  struct str_Writer *state = (struct str_Writer *)ud;
-  if (!state->init) {
-    state->init = 1;
-    luaL_buffinit(L, &state->B);
-  }
-  luaL_addlstring(&state->B, (const char *)b, size);
+static int writer (lua_State *L, const void *b, size_t size, void *B) {
+  (void)L;
+  luaL_addlstring((luaL_Buffer *) B, (const char *)b, size);
   return 0;
 }
 
 
 static int str_dump (lua_State *L) {
-  struct str_Writer state;
+  luaL_Buffer b;
   int strip = lua_toboolean(L, 2);
   luaL_checktype(L, 1, LUA_TFUNCTION);
-  lua_settop(L, 1);  /* ensure function is on the top of the stack */
-  state.init = 0;
-  if (l_unlikely(lua_dump(L, writer, &state, strip) != 0))
+  lua_settop(L, 1);
+  luaL_buffinit(L,&b);
+  if (lua_dump(L, writer, &b, strip) != 0)
     return luaL_error(L, "unable to dump given function");
-  luaL_pushresult(&state.B);
+  luaL_pushresult(&b);
   return 1;
 }
 
 
 
-/*
-** {======================================================
-** METAMETHODS
-** =======================================================
-*/
-
-#if defined(LUA_NOCVTS2N)	/* { */
-
-/* no coercion from strings to numbers */
-
-static const luaL_Reg stringmetamethods[] = {
-  {"__index", NULL},  /* placeholder */
-  {NULL, NULL}
-};
-
-#else		/* }{ */
-
-static int tonum (lua_State *L, int arg) {
-  if (lua_type(L, arg) == LUA_TNUMBER) {  /* already a number? */
-    lua_pushvalue(L, arg);
-    return 1;
-  }
-  else {  /* check whether it is a numerical string */
-    size_t len;
-    const char *s = lua_tolstring(L, arg, &len);
-    return (s != NULL && lua_stringtonumber(L, s) == len + 1);
-  }
-}
-
-
-static void trymt (lua_State *L, const char *mtname) {
-  lua_settop(L, 2);  /* back to the original arguments */
-  if (l_unlikely(lua_type(L, 2) == LUA_TSTRING ||
-                 !luaL_getmetafield(L, 2, mtname)))
-    luaL_error(L, "attempt to %s a '%s' with a '%s'", mtname + 2,
-                  luaL_typename(L, -2), luaL_typename(L, -1));
-  lua_insert(L, -3);  /* put metamethod before arguments */
-  lua_call(L, 2, 1);  /* call metamethod */
-}
-
-
-static int arith (lua_State *L, int op, const char *mtname) {
-  if (tonum(L, 1) && tonum(L, 2))
-    lua_arith(L, op);  /* result will be on the top */
-  else
-    trymt(L, mtname);
-  return 1;
-}
-
-
-static int arith_add (lua_State *L) {
-  return arith(L, LUA_OPADD, "__add");
-}
-
-static int arith_sub (lua_State *L) {
-  return arith(L, LUA_OPSUB, "__sub");
-}
-
-static int arith_mul (lua_State *L) {
-  return arith(L, LUA_OPMUL, "__mul");
-}
-
-static int arith_mod (lua_State *L) {
-  return arith(L, LUA_OPMOD, "__mod");
-}
-
-static int arith_pow (lua_State *L) {
-  return arith(L, LUA_OPPOW, "__pow");
-}
-
-static int arith_div (lua_State *L) {
-  return arith(L, LUA_OPDIV, "__div");
-}
-
-static int arith_idiv (lua_State *L) {
-  return arith(L, LUA_OPIDIV, "__idiv");
-}
-
-static int arith_unm (lua_State *L) {
-  return arith(L, LUA_OPUNM, "__unm");
-}
-
-
-static const luaL_Reg stringmetamethods[] = {
-  {"__add", arith_add},
-  {"__sub", arith_sub},
-  {"__mul", arith_mul},
-  {"__mod", arith_mod},
-  {"__pow", arith_pow},
-  {"__div", arith_div},
-  {"__idiv", arith_idiv},
-  {"__unm", arith_unm},
-  {"__index", NULL},  /* placeholder */
-  {NULL, NULL}
-};
-
-#endif		/* } */
-
-/* }====================================================== */
-
 /*
 ** {======================================================
 ** PATTERN MATCHING
@@ -385,8 +241,7 @@ static const char *match (MatchState *ms, const char *s, const char *p);
 
 static int check_capture (MatchState *ms, int l) {
   l -= '1';
-  if (l_unlikely(l < 0 || l >= ms->level ||
-                 ms->capture[l].len == CAP_UNFINISHED))
+  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
     return luaL_error(ms->L, "invalid capture index %%%d", l + 1);
   return l;
 }
@@ -403,14 +258,14 @@ static int capture_to_close (MatchState *ms) {
 static const char *classend (MatchState *ms, const char *p) {
   switch (*p++) {
     case L_ESC: {
-      if (l_unlikely(p == ms->p_end))
+      if (p == ms->p_end)
         luaL_error(ms->L, "malformed pattern (ends with '%%')");
       return p+1;
     }
     case '[': {
       if (*p == '^') p++;
       do {  /* look for a ']' */
-        if (l_unlikely(p == ms->p_end))
+        if (p == ms->p_end)
           luaL_error(ms->L, "malformed pattern (missing ']')");
         if (*(p++) == L_ESC && p < ms->p_end)
           p++;  /* skip escapes (e.g. '%]') */
@@ -485,7 +340,7 @@ static int singlematch (MatchState *ms, const char *s, const char *p,
 
 static const char *matchbalance (MatchState *ms, const char *s,
                                    const char *p) {
-  if (l_unlikely(p >= ms->p_end - 1))
+  if (p >= ms->p_end - 1)
     luaL_error(ms->L, "malformed pattern (missing arguments to '%%b')");
   if (*s != *p) return NULL;
   else {
@@ -568,7 +423,7 @@ static const char *match_capture (MatchState *ms, const char *s, int l) {
 
 
 static const char *match (MatchState *ms, const char *s, const char *p) {
-  if (l_unlikely(ms->matchdepth-- == 0))
+  if (ms->matchdepth-- == 0)
     luaL_error(ms->L, "pattern too complex");
   init: /* using goto's to optimize tail recursion */
   if (p != ms->p_end) {  /* end of pattern? */
@@ -602,7 +457,7 @@ static const char *match (MatchState *ms, const char *s, const char *p) {
           case 'f': {  /* frontier? */
             const char *ep; char previous;
             p += 2;
-            if (l_unlikely(*p != '['))
+            if (*p != '[')
               luaL_error(ms->L, "missing '[' after '%%f' in pattern");
             ep = classend(ms, p);  /* points to what is next */
             previous = (s == ms->src_init) ? '\0' : *(s - 1);
@@ -692,43 +547,22 @@ static const char *lmemfind (const char *s1, size_t l1,
 }
 
 
-/*
-** get information about the i-th capture. If there are no captures
-** and 'i==0', return information about the whole match, which
-** is the range 's'..'e'. If the capture is a string, return
-** its length and put its address in '*cap'. If it is an integer
-** (a position), push it on the stack and return CAP_POSITION.
-*/
-static size_t get_onecapture (MatchState *ms, int i, const char *s,
-                              const char *e, const char **cap) {
-  if (i >= ms->level) {
-    if (l_unlikely(i != 0))
-      luaL_error(ms->L, "invalid capture index %%%d", i + 1);
-    *cap = s;
-    return e - s;
-  }
-  else {
-    ptrdiff_t capl = ms->capture[i].len;
-    *cap = ms->capture[i].init;
-    if (l_unlikely(capl == CAP_UNFINISHED))
-      luaL_error(ms->L, "unfinished capture");
-    else if (capl == CAP_POSITION)
-      lua_pushinteger(ms->L, (ms->capture[i].init - ms->src_init) + 1);
-    return capl;
-  }
-}
-
-
-/*
-** Push the i-th capture on the stack.
-*/
 static void push_onecapture (MatchState *ms, int i, const char *s,
                                                     const char *e) {
-  const char *cap;
-  ptrdiff_t l = get_onecapture(ms, i, s, e, &cap);
-  if (l != CAP_POSITION)
-    lua_pushlstring(ms->L, cap, l);
-  /* else position was already pushed */
+  if (i >= ms->level) {
+    if (i == 0)  /* ms->level == 0, too */
+      lua_pushlstring(ms->L, s, e - s);  /* add whole match */
+    else
+      luaL_error(ms->L, "invalid capture index %%%d", i + 1);
+  }
+  else {
+    ptrdiff_t l = ms->capture[i].len;
+    if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
+    if (l == CAP_POSITION)
+      lua_pushinteger(ms->L, (ms->capture[i].init - ms->src_init) + 1);
+    else
+      lua_pushlstring(ms->L, ms->capture[i].init, l);
+  }
 }
 
 
@@ -774,15 +608,16 @@ static int str_find_aux (lua_State *L, int find) {
   size_t ls, lp;
   const char *s = luaL_checklstring(L, 1, &ls);
   const char *p = luaL_checklstring(L, 2, &lp);
-  size_t init = posrelatI(luaL_optinteger(L, 3, 1), ls) - 1;
-  if (init > ls) {  /* start after string's end? */
-    luaL_pushfail(L);  /* cannot find anything */
+  lua_Integer init = posrelat(luaL_optinteger(L, 3, 1), ls);
+  if (init < 1) init = 1;
+  else if (init > (lua_Integer)ls + 1) {  /* start after string's end? */
+    lua_pushnil(L);  /* cannot find anything */
     return 1;
   }
   /* explicit request or no special characters? */
   if (find && (lua_toboolean(L, 4) || nospecials(p, lp))) {
     /* do a plain search */
-    const char *s2 = lmemfind(s + init, ls - init, p, lp);
+    const char *s2 = lmemfind(s + init - 1, ls - (size_t)init + 1, p, lp);
     if (s2) {
       lua_pushinteger(L, (s2 - s) + 1);
       lua_pushinteger(L, (s2 - s) + lp);
@@ -791,7 +626,7 @@ static int str_find_aux (lua_State *L, int find) {
   }
   else {
     MatchState ms;
-    const char *s1 = s + init;
+    const char *s1 = s + init - 1;
     int anchor = (*p == '^');
     if (anchor) {
       p++; lp--;  /* skip anchor character */
@@ -811,7 +646,7 @@ static int str_find_aux (lua_State *L, int find) {
       }
     } while (s1++ < ms.src_end && !anchor);
   }
-  luaL_pushfail(L);  /* not found */
+  lua_pushnil(L);  /* not found */
   return 1;
 }
 
@@ -855,14 +690,11 @@ static int gmatch (lua_State *L) {
   size_t ls, lp;
   const char *s = luaL_checklstring(L, 1, &ls);
   const char *p = luaL_checklstring(L, 2, &lp);
-  size_t init = posrelatI(luaL_optinteger(L, 3, 1), ls) - 1;
   GMatchState *gm;
-  lua_settop(L, 2);  /* keep strings on closure to avoid being collected */
-  gm = (GMatchState *)lua_newuserdatauv(L, sizeof(GMatchState), 0);
-  if (init > ls)  /* start after string's end? */
-    init = ls + 1;  /* avoid overflows in 's + init' */
+  lua_settop(L, 2);  /* keep them on closure to avoid being collected */
+  gm = (GMatchState *)lua_newuserdata(L, sizeof(GMatchState));
   prepstate(&gm->ms, L, s, ls, p, lp);
-  gm->src = s + init; gm->p = p; gm->lastmatch = NULL;
+  gm->src = s; gm->p = p; gm->lastmatch = NULL;
   lua_pushcclosure(L, gmatch_aux, 3);
   return 1;
 }
@@ -870,72 +702,60 @@ static int gmatch (lua_State *L) {
 
 static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
                                                    const char *e) {
-  size_t l;
+  size_t l, i;
   lua_State *L = ms->L;
   const char *news = lua_tolstring(L, 3, &l);
-  const char *p;
-  while ((p = (char *)memchr(news, L_ESC, l)) != NULL) {
-    luaL_addlstring(b, news, p - news);
-    p++;  /* skip ESC */
-    if (*p == L_ESC)  /* '%%' */
-      luaL_addchar(b, *p);
-    else if (*p == '0')  /* '%0' */
-        luaL_addlstring(b, s, e - s);
-    else if (isdigit(uchar(*p))) {  /* '%n' */
-      const char *cap;
-      ptrdiff_t resl = get_onecapture(ms, *p - '1', s, e, &cap);
-      if (resl == CAP_POSITION)
-        luaL_addvalue(b);  /* add position to accumulated result */
-      else
-        luaL_addlstring(b, cap, resl);
+  for (i = 0; i < l; i++) {
+    if (news[i] != L_ESC)
+      luaL_addchar(b, news[i]);
+    else {
+      i++;  /* skip ESC */
+      if (!isdigit(uchar(news[i]))) {
+        if (news[i] != L_ESC)
+          luaL_error(L, "invalid use of '%c' in replacement string", L_ESC);
+        luaL_addchar(b, news[i]);
+      }
+      else if (news[i] == '0')
+          luaL_addlstring(b, s, e - s);
+      else {
+        push_onecapture(ms, news[i] - '1', s, e);
+        luaL_tolstring(L, -1, NULL);  /* if number, convert it to string */
+        lua_remove(L, -2);  /* remove original value */
+        luaL_addvalue(b);  /* add capture to accumulated result */
+      }
     }
-    else
-      luaL_error(L, "invalid use of '%c' in replacement string", L_ESC);
-    l -= p + 1 - news;
-    news = p + 1;
   }
-  luaL_addlstring(b, news, l);
 }
 
 
-/*
-** Add the replacement value to the string buffer 'b'.
-** Return true if the original string was changed. (Function calls and
-** table indexing resulting in nil or false do not change the subject.)
-*/
-static int add_value (MatchState *ms, luaL_Buffer *b, const char *s,
-                                      const char *e, int tr) {
+static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
+                                       const char *e, int tr) {
   lua_State *L = ms->L;
   switch (tr) {
-    case LUA_TFUNCTION: {  /* call the function */
+    case LUA_TFUNCTION: {
       int n;
-      lua_pushvalue(L, 3);  /* push the function */
-      n = push_captures(ms, s, e);  /* all captures as arguments */
-      lua_call(L, n, 1);  /* call it */
+      lua_pushvalue(L, 3);
+      n = push_captures(ms, s, e);
+      lua_call(L, n, 1);
       break;
     }
-    case LUA_TTABLE: {  /* index the table */
-      push_onecapture(ms, 0, s, e);  /* first capture is the index */
+    case LUA_TTABLE: {
+      push_onecapture(ms, 0, s, e);
       lua_gettable(L, 3);
       break;
     }
     default: {  /* LUA_TNUMBER or LUA_TSTRING */
-      add_s(ms, b, s, e);  /* add value to the buffer */
-      return 1;  /* something changed */
+      add_s(ms, b, s, e);
+      return;
     }
   }
   if (!lua_toboolean(L, -1)) {  /* nil or false? */
-    lua_pop(L, 1);  /* remove value */
-    luaL_addlstring(b, s, e - s);  /* keep original text */
-    return 0;  /* no changes */
-  }
-  else if (l_unlikely(!lua_isstring(L, -1)))
-    return luaL_error(L, "invalid replacement value (a %s)",
-                         luaL_typename(L, -1));
-  else {
-    luaL_addvalue(b);  /* add result to accumulator */
-    return 1;  /* something changed */
+    lua_pop(L, 1);
+    lua_pushlstring(L, s, e - s);  /* keep original text */
   }
+  else if (!lua_isstring(L, -1))
+    luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1));
+  luaL_addvalue(b);  /* add result to accumulator */
 }
 
 
@@ -948,12 +768,11 @@ static int str_gsub (lua_State *L) {
   lua_Integer max_s = luaL_optinteger(L, 4, srcl + 1);  /* max replacements */
   int anchor = (*p == '^');
   lua_Integer n = 0;  /* replacement count */
-  int changed = 0;  /* change flag */
   MatchState ms;
   luaL_Buffer b;
-  luaL_argexpected(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
+  luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
                    tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3,
-                      "string/function/table");
+                      "string/function/table expected");
   luaL_buffinit(L, &b);
   if (anchor) {
     p++; lp--;  /* skip anchor character */
@@ -964,7 +783,7 @@ static int str_gsub (lua_State *L) {
     reprepstate(&ms);  /* (re)prepare state for new match */
     if ((e = match(&ms, src, p)) != NULL && e != lastmatch) {  /* match? */
       n++;
-      changed = add_value(&ms, &b, src, e, tr) | changed;
+      add_value(&ms, &b, src, e, tr);  /* add replacement to buffer */
       src = lastmatch = e;
     }
     else if (src < ms.src_end)  /* otherwise, skip one character */
@@ -972,12 +791,8 @@ static int str_gsub (lua_State *L) {
     else break;  /* end of subject */
     if (anchor) break;
   }
-  if (!changed)  /* no changes? */
-    lua_pushvalue(L, 1);  /* return original string */
-  else {  /* something changed */
-    luaL_addlstring(&b, src, ms.src_end-src);
-    luaL_pushresult(&b);  /* create and return new string */
-  }
+  luaL_addlstring(&b, src, ms.src_end-src);
+  luaL_pushresult(&b);
   lua_pushinteger(L, n);  /* number of substitutions */
   return 2;
 }
@@ -998,6 +813,8 @@ static int str_gsub (lua_State *L) {
 ** Hexadecimal floating-point formatter
 */
 
+#include <math.h>
+
 #define SIZELENMOD	(sizeof(LUA_NUMBER_FRMLEN)/sizeof(char))
 
 
@@ -1007,7 +824,7 @@ static int str_gsub (lua_State *L) {
 ** to nibble boundaries by making what is left after that first digit a
 ** multiple of 4.
 */
-#define L_NBFD		((l_floatatt(MANT_DIG) - 1)%4 + 1)
+#define L_NBFD		((l_mathlim(MANT_DIG) - 1)%4 + 1)
 
 
 /*
@@ -1034,7 +851,7 @@ static int num2straux (char *buff, int sz, lua_Number x) {
     lua_Number m = l_mathop(frexp)(x, &e);  /* 'x' fraction and exponent */
     int n = 0;  /* character count */
     if (m < 0) {  /* is number negative? */
-      buff[n++] = '-';  /* add sign */
+      buff[n++] = '-';  /* add signal */
       m = -m;  /* make it positive */
     }
     buff[n++] = '0'; buff[n++] = 'x';  /* add "0x" */
@@ -1061,7 +878,7 @@ static int lua_number2strx (lua_State *L, char *buff, int sz,
     for (i = 0; i < n; i++)
       buff[i] = toupper(uchar(buff[i]));
   }
-  else if (l_unlikely(fmt[SIZELENMOD] != 'a'))
+  else if (fmt[SIZELENMOD] != 'a')
     return luaL_error(L, "modifiers for format '%%a'/'%%A' not implemented");
   return n;
 }
@@ -1070,30 +887,17 @@ static int lua_number2strx (lua_State *L, char *buff, int sz,
 
 
 /*
-** Maximum size for items formatted with '%f'. This size is produced
+** Maximum size of each formatted item. This maximum size is produced
 ** by format('%.99f', -maxfloat), and is equal to 99 + 3 ('-', '.',
 ** and '\0') + number of decimal digits to represent maxfloat (which
-** is maximum exponent + 1). (99+3+1, adding some extra, 110)
+** is maximum exponent + 1). (99+3+1 then rounded to 120 for "extra
+** expenses", such as locale-dependent stuff)
 */
-#define MAX_ITEMF	(110 + l_floatatt(MAX_10_EXP))
-
-
-/*
-** All formats except '%f' do not need that large limit.  The other
-** float formats use exponents, so that they fit in the 99 limit for
-** significant digits; 's' for large strings and 'q' add items directly
-** to the buffer; all integer formats also fit in the 99 limit.  The
-** worst case are floats: they may need 99 significant digits, plus
-** '0x', '-', '.', 'e+XXXX', and '\0'. Adding some extra, 120.
-*/
-#define MAX_ITEM	120
+#define MAX_ITEM        (120 + l_mathlim(MAX_10_EXP))
 
 
 /* valid flags in a format specification */
-#if !defined(L_FMTFLAGS)
-#define L_FMTFLAGS	"-+ #0"
-#endif
-
+#define FLAGS	"-+ #0"
 
 /*
 ** maximum size of each format specification (such as "%-099.99d")
@@ -1125,32 +929,14 @@ static void addquoted (luaL_Buffer *b, const char *s, size_t len) {
 
 
 /*
-** Serialize a floating-point number in such a way that it can be
-** scanned back by Lua. Use hexadecimal format for "common" numbers
-** (to preserve precision); inf, -inf, and NaN are handled separately.
-** (NaN cannot be expressed as a numeral, so we write '(0/0)' for it.)
+** Ensures the 'buff' string uses a dot as the radix character.
 */
-static int quotefloat (lua_State *L, char *buff, lua_Number n) {
-  const char *s;  /* for the fixed representations */
-  if (n == (lua_Number)HUGE_VAL)  /* inf? */
-    s = "1e9999";
-  else if (n == -(lua_Number)HUGE_VAL)  /* -inf? */
-    s = "-1e9999";
-  else if (n != n)  /* NaN? */
-    s = "(0/0)";
-  else {  /* format number as hexadecimal */
-    int  nb = lua_number2strx(L, buff, MAX_ITEM,
-                                 "%" LUA_NUMBER_FRMLEN "a", n);
-    /* ensures that 'buff' string uses a dot as the radix character */
-    if (memchr(buff, '.', nb) == NULL) {  /* no dot? */
-      char point = lua_getlocaledecpoint();  /* try locale point */
-      char *ppoint = (char *)memchr(buff, point, nb);
-      if (ppoint) *ppoint = '.';  /* change it to a dot */
-    }
-    return nb;
+static void checkdp (char *buff, int nb) {
+  if (memchr(buff, '.', nb) == NULL) {  /* no dot? */
+    char point = lua_getlocaledecpoint();  /* try locale point */
+    char *ppoint = (char *)memchr(buff, point, nb);
+    if (ppoint) *ppoint = '.';  /* change it to a dot */
   }
-  /* for the fixed representations */
-  return l_sprintf(buff, MAX_ITEM, "%s", s);
 }
 
 
@@ -1165,12 +951,15 @@ static void addliteral (lua_State *L, luaL_Buffer *b, int arg) {
     case LUA_TNUMBER: {
       char *buff = luaL_prepbuffsize(b, MAX_ITEM);
       int nb;
-      if (!lua_isinteger(L, arg))  /* float? */
-        nb = quotefloat(L, buff, lua_tonumber(L, arg));
+      if (!lua_isinteger(L, arg)) {  /* float? */
+        lua_Number n = lua_tonumber(L, arg);  /* write as hexa ('%a') */
+        nb = lua_number2strx(L, buff, MAX_ITEM, "%" LUA_NUMBER_FRMLEN "a", n);
+        checkdp(buff, nb);  /* ensure it uses a dot */
+      }
       else {  /* integers */
         lua_Integer n = lua_tointeger(L, arg);
         const char *format = (n == LUA_MININTEGER)  /* corner case? */
-                           ? "0x%" LUA_INTEGER_FRMLEN "x"  /* use hex */
+                           ? "0x%" LUA_INTEGER_FRMLEN "x"  /* use hexa */
                            : LUA_INTEGER_FMT;  /* else use default format */
         nb = l_sprintf(buff, MAX_ITEM, format, (LUAI_UACINT)n);
       }
@@ -1191,8 +980,8 @@ static void addliteral (lua_State *L, luaL_Buffer *b, int arg) {
 
 static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
   const char *p = strfrmt;
-  while (*p != '\0' && strchr(L_FMTFLAGS, *p) != NULL) p++;  /* skip flags */
-  if ((size_t)(p - strfrmt) >= sizeof(L_FMTFLAGS)/sizeof(char))
+  while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++;  /* skip flags */
+  if ((size_t)(p - strfrmt) >= sizeof(FLAGS)/sizeof(char))
     luaL_error(L, "invalid format (repeated flags)");
   if (isdigit(uchar(*p))) p++;  /* skip width */
   if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
@@ -1239,51 +1028,36 @@ static int str_format (lua_State *L) {
       luaL_addchar(&b, *strfrmt++);  /* %% */
     else { /* format item */
       char form[MAX_FORMAT];  /* to store the format ('%...') */
-      int maxitem = MAX_ITEM;
-      char *buff = luaL_prepbuffsize(&b, maxitem);  /* to put formatted item */
+      char *buff = luaL_prepbuffsize(&b, MAX_ITEM);  /* to put formatted item */
       int nb = 0;  /* number of bytes in added item */
       if (++arg > top)
-        return luaL_argerror(L, arg, "no value");
+        luaL_argerror(L, arg, "no value");
       strfrmt = scanformat(L, strfrmt, form);
       switch (*strfrmt++) {
         case 'c': {
-          nb = l_sprintf(buff, maxitem, form, (int)luaL_checkinteger(L, arg));
+          nb = l_sprintf(buff, MAX_ITEM, form, (int)luaL_checkinteger(L, arg));
           break;
         }
         case 'd': case 'i':
         case 'o': case 'u': case 'x': case 'X': {
           lua_Integer n = luaL_checkinteger(L, arg);
           addlenmod(form, LUA_INTEGER_FRMLEN);
-          nb = l_sprintf(buff, maxitem, form, (LUAI_UACINT)n);
+          nb = l_sprintf(buff, MAX_ITEM, form, (LUAI_UACINT)n);
           break;
         }
         case 'a': case 'A':
           addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = lua_number2strx(L, buff, maxitem, form,
+          nb = lua_number2strx(L, buff, MAX_ITEM, form,
                                   luaL_checknumber(L, arg));
           break;
-        case 'f':
-          maxitem = MAX_ITEMF;  /* extra space for '%f' */
-          buff = luaL_prepbuffsize(&b, maxitem);
-          /* FALLTHROUGH */
-        case 'e': case 'E': case 'g': case 'G': {
+        case 'e': case 'E': case 'f':
+        case 'g': case 'G': {
           lua_Number n = luaL_checknumber(L, arg);
           addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = l_sprintf(buff, maxitem, form, (LUAI_UACNUMBER)n);
-          break;
-        }
-        case 'p': {
-          const void *p = lua_topointer(L, arg);
-          if (p == NULL) {  /* avoid calling 'printf' with argument NULL */
-            p = "(null)";  /* result */
-            form[strlen(form) - 1] = 's';  /* format it as a string */
-          }
-          nb = l_sprintf(buff, maxitem, form, p);
+          nb = l_sprintf(buff, MAX_ITEM, form, (LUAI_UACNUMBER)n);
           break;
         }
         case 'q': {
-          if (form[2] != '\0')  /* modifiers? */
-            return luaL_error(L, "specifier '%%q' cannot have modifiers");
           addliteral(L, &b, arg);
           break;
         }
@@ -1299,17 +1073,18 @@ static int str_format (lua_State *L) {
               luaL_addvalue(&b);  /* keep entire string */
             }
             else {  /* format the string into 'buff' */
-              nb = l_sprintf(buff, maxitem, form, s);
+              nb = l_sprintf(buff, MAX_ITEM, form, s);
               lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
             }
           }
           break;
         }
         default: {  /* also treat cases 'pnLlh' */
-          return luaL_error(L, "invalid conversion '%s' to 'format'", form);
+          return luaL_error(L, "invalid option '%%%c' to 'format'",
+                               *(strfrmt - 1));
         }
       }
-      lua_assert(nb < maxitem);
+      lua_assert(nb < MAX_ITEM);
       luaL_addsize(&b, nb);
     }
   }
@@ -1361,6 +1136,17 @@ struct cD {
 #define MAXALIGN	(offsetof(struct cD, u))
 
 
+/*
+** Union for serializing floats
+*/
+typedef union Ftypes {
+  float f;
+  double d;
+  lua_Number n;
+  char buff[5 * sizeof(lua_Number)];  /* enough for any float type */
+} Ftypes;
+
+
 /*
 ** information to pack/unpack stuff
 */
@@ -1377,9 +1163,7 @@ typedef struct Header {
 typedef enum KOption {
   Kint,		/* signed integers */
   Kuint,	/* unsigned integers */
-  Kfloat,	/* single-precision floating-point numbers */
-  Knumber,	/* Lua "native" floating-point numbers */
-  Kdouble,	/* double-precision floating-point numbers */
+  Kfloat,	/* floating-point numbers */
   Kchar,	/* fixed-length strings */
   Kstring,	/* strings with prefixed length */
   Kzstr,	/* zero-terminated strings */
@@ -1414,7 +1198,7 @@ static int getnum (const char **fmt, int df) {
 */
 static int getnumlimit (Header *h, const char **fmt, int df) {
   int sz = getnum(fmt, df);
-  if (l_unlikely(sz > MAXINTSIZE || sz <= 0))
+  if (sz > MAXINTSIZE || sz <= 0)
     return luaL_error(h->L, "integral size (%d) out of limits [1,%d]",
                             sz, MAXINTSIZE);
   return sz;
@@ -1448,14 +1232,14 @@ static KOption getoption (Header *h, const char **fmt, int *size) {
     case 'J': *size = sizeof(lua_Integer); return Kuint;
     case 'T': *size = sizeof(size_t); return Kuint;
     case 'f': *size = sizeof(float); return Kfloat;
-    case 'n': *size = sizeof(lua_Number); return Knumber;
-    case 'd': *size = sizeof(double); return Kdouble;
+    case 'd': *size = sizeof(double); return Kfloat;
+    case 'n': *size = sizeof(lua_Number); return Kfloat;
     case 'i': *size = getnumlimit(h, fmt, sizeof(int)); return Kint;
     case 'I': *size = getnumlimit(h, fmt, sizeof(int)); return Kuint;
     case 's': *size = getnumlimit(h, fmt, sizeof(size_t)); return Kstring;
     case 'c':
       *size = getnum(fmt, -1);
-      if (l_unlikely(*size == -1))
+      if (*size == -1)
         luaL_error(h->L, "missing size for format option 'c'");
       return Kchar;
     case 'z': return Kzstr;
@@ -1494,7 +1278,7 @@ static KOption getdetails (Header *h, size_t totalsize,
   else {
     if (align > h->maxalign)  /* enforce maximum alignment */
       align = h->maxalign;
-    if (l_unlikely((align & (align - 1)) != 0))  /* not a power of 2? */
+    if ((align & (align - 1)) != 0)  /* is 'align' not a power of 2? */
       luaL_argerror(h->L, 1, "format asks for alignment not power of 2");
     *ntoalign = (align - (int)(totalsize & (align - 1))) & (align - 1);
   }
@@ -1529,10 +1313,12 @@ static void packint (luaL_Buffer *b, lua_Unsigned n,
 ** Copy 'size' bytes from 'src' to 'dest', correcting endianness if
 ** given 'islittle' is different from native endianness.
 */
-static void copywithendian (char *dest, const char *src,
+static void copywithendian (volatile char *dest, volatile const char *src,
                             int size, int islittle) {
-  if (islittle == nativeendian.little)
-    memcpy(dest, src, size);
+  if (islittle == nativeendian.little) {
+    while (size-- != 0)
+      *(dest++) = *(src++);
+  }
   else {
     dest += size - 1;
     while (size-- != 0)
@@ -1575,27 +1361,15 @@ static int str_pack (lua_State *L) {
         packint(&b, (lua_Unsigned)n, h.islittle, size, 0);
         break;
       }
-      case Kfloat: {  /* C float */
-        float f = (float)luaL_checknumber(L, arg);  /* get argument */
-        char *buff = luaL_prepbuffsize(&b, sizeof(f));
-        /* move 'f' to final result, correcting endianness if needed */
-        copywithendian(buff, (char *)&f, sizeof(f), h.islittle);
-        luaL_addsize(&b, size);
-        break;
-      }
-      case Knumber: {  /* Lua float */
-        lua_Number f = luaL_checknumber(L, arg);  /* get argument */
-        char *buff = luaL_prepbuffsize(&b, sizeof(f));
-        /* move 'f' to final result, correcting endianness if needed */
-        copywithendian(buff, (char *)&f, sizeof(f), h.islittle);
-        luaL_addsize(&b, size);
-        break;
-      }
-      case Kdouble: {  /* C double */
-        double f = (double)luaL_checknumber(L, arg);  /* get argument */
-        char *buff = luaL_prepbuffsize(&b, sizeof(f));
-        /* move 'f' to final result, correcting endianness if needed */
-        copywithendian(buff, (char *)&f, sizeof(f), h.islittle);
+      case Kfloat: {  /* floating-point options */
+        volatile Ftypes u;
+        char *buff = luaL_prepbuffsize(&b, size);
+        lua_Number n = luaL_checknumber(L, arg);  /* get argument */
+        if (size == sizeof(u.f)) u.f = (float)n;  /* copy it into 'u' */
+        else if (size == sizeof(u.d)) u.d = (double)n;
+        else u.n = n;
+        /* move 'u' to final result, correcting endianness if needed */
+        copywithendian(buff, u.buff, size, h.islittle);
         luaL_addsize(&b, size);
         break;
       }
@@ -1648,12 +1422,17 @@ static int str_packsize (lua_State *L) {
   while (*fmt != '\0') {
     int size, ntoalign;
     KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign);
-    luaL_argcheck(L, opt != Kstring && opt != Kzstr, 1,
-                     "variable-length format");
     size += ntoalign;  /* total space used by option */
     luaL_argcheck(L, totalsize <= MAXSIZE - size, 1,
                      "format result too large");
     totalsize += size;
+    switch (opt) {
+      case Kstring:  /* strings with length count */
+      case Kzstr:    /* zero-terminated string */
+        luaL_argerror(L, 1, "variable-length format");
+        /* call never return, but to avoid warnings: *//* FALLTHROUGH */
+      default:  break;
+    }
   }
   lua_pushinteger(L, (lua_Integer)totalsize);
   return 1;
@@ -1686,7 +1465,7 @@ static lua_Integer unpackint (lua_State *L, const char *str,
   else if (size > SZINT) {  /* must check unread bytes */
     int mask = (!issigned || (lua_Integer)res >= 0) ? 0 : MC;
     for (i = limit; i < size; i++) {
-      if (l_unlikely((unsigned char)str[islittle ? i : size - 1 - i] != mask))
+      if ((unsigned char)str[islittle ? i : size - 1 - i] != mask)
         luaL_error(L, "%d-byte integer does not fit into Lua Integer", size);
     }
   }
@@ -1699,15 +1478,15 @@ static int str_unpack (lua_State *L) {
   const char *fmt = luaL_checkstring(L, 1);
   size_t ld;
   const char *data = luaL_checklstring(L, 2, &ld);
-  size_t pos = posrelatI(luaL_optinteger(L, 3, 1), ld) - 1;
+  size_t pos = (size_t)posrelat(luaL_optinteger(L, 3, 1), ld) - 1;
   int n = 0;  /* number of results */
   luaL_argcheck(L, pos <= ld, 3, "initial position out of string");
   initheader(L, &h);
   while (*fmt != '\0') {
     int size, ntoalign;
     KOption opt = getdetails(&h, pos, &fmt, &size, &ntoalign);
-    luaL_argcheck(L, (size_t)ntoalign + size <= ld - pos, 2,
-                    "data string too short");
+    if ((size_t)ntoalign + size > ~pos || pos + ntoalign + size > ld)
+      luaL_argerror(L, 2, "data string too short");
     pos += ntoalign;  /* skip alignment */
     /* stack space for item + next position */
     luaL_checkstack(L, 2, "too many results");
@@ -1721,21 +1500,13 @@ static int str_unpack (lua_State *L) {
         break;
       }
       case Kfloat: {
-        float f;
-        copywithendian((char *)&f, data + pos, sizeof(f), h.islittle);
-        lua_pushnumber(L, (lua_Number)f);
-        break;
-      }
-      case Knumber: {
-        lua_Number f;
-        copywithendian((char *)&f, data + pos, sizeof(f), h.islittle);
-        lua_pushnumber(L, f);
-        break;
-      }
-      case Kdouble: {
-        double f;
-        copywithendian((char *)&f, data + pos, sizeof(f), h.islittle);
-        lua_pushnumber(L, (lua_Number)f);
+        volatile Ftypes u;
+        lua_Number num;
+        copywithendian(u.buff, data + pos, size, h.islittle);
+        if (size == sizeof(u.f)) num = (lua_Number)u.f;
+        else if (size == sizeof(u.d)) num = (lua_Number)u.d;
+        else num = u.n;
+        lua_pushnumber(L, num);
         break;
       }
       case Kchar: {
@@ -1744,15 +1515,13 @@ static int str_unpack (lua_State *L) {
       }
       case Kstring: {
         size_t len = (size_t)unpackint(L, data + pos, h.islittle, size, 0);
-        luaL_argcheck(L, len <= ld - pos - size, 2, "data string too short");
+        luaL_argcheck(L, pos + len + size <= ld, 2, "data string too short");
         lua_pushlstring(L, data + pos + size, len);
         pos += len;  /* skip string */
         break;
       }
       case Kzstr: {
-        size_t len = strlen(data + pos);
-        luaL_argcheck(L, pos + len < ld, 2,
-                         "unfinished string for format 'z'");
+        size_t len = (int)strlen(data + pos);
         lua_pushlstring(L, data + pos, len);
         pos += len + 1;  /* skip string plus final '\0' */
         break;
@@ -1793,9 +1562,7 @@ static const luaL_Reg strlib[] = {
 
 
 static void createmetatable (lua_State *L) {
-  /* table to be metatable for strings */
-  luaL_newlibtable(L, stringmetamethods);
-  luaL_setfuncs(L, stringmetamethods, 0);
+  lua_createtable(L, 0, 1);  /* table to be metatable for strings */
   lua_pushliteral(L, "");  /* dummy string */
   lua_pushvalue(L, -2);  /* copy table */
   lua_setmetatable(L, -2);  /* set table as metatable for strings */

ltable.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h $
+** $Id: ltable.h,v 2.23.1.2 2018/05/24 19:39:05 roberto Exp $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -12,15 +12,19 @@
 
 #define gnode(t,i)	(&(t)->node[i])
 #define gval(n)		(&(n)->i_val)
-#define gnext(n)	((n)->u.next)
+#define gnext(n)	((n)->i_key.nk.next)
 
 
+/* 'const' to avoid wrong writings that can mess up field 'next' */
+#define gkey(n)		cast(const TValue*, (&(n)->i_key.tvk))
+
 /*
-** Clear all bits of fast-access metamethods, which means that the table
-** may have any of these metamethods. (First access that fails after the
-** clearing will set the bit again.)
+** writable version of 'gkey'; allows updates to individual fields,
+** but not to the whole (which has incompatible type)
 */
-#define invalidateTMcache(t)	((t)->flags &= ~maskflags)
+#define wgkey(n)		(&(n)->i_key.nk)
+
+#define invalidateTMcache(t)	((t)->flags = 0)
 
 
 /* true when 't' is using 'dummynode' as its hash part */
@@ -31,8 +35,9 @@
 #define allocsizenode(t)	(isdummy(t) ? 0 : sizenode(t))
 
 
-/* returns the Node, given the value of a table entry */
-#define nodefromval(v)	cast(Node *, (v))
+/* returns the key, given the value of a table entry */
+#define keyfromval(v) \
+  (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
 
 
 LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
@@ -41,12 +46,8 @@ LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
 LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
 LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
 LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
-LUAI_FUNC void luaH_newkey (lua_State *L, Table *t, const TValue *key,
-                                                    TValue *value);
-LUAI_FUNC void luaH_set (lua_State *L, Table *t, const TValue *key,
-                                                 TValue *value);
-LUAI_FUNC void luaH_finishset (lua_State *L, Table *t, const TValue *key,
-                                       const TValue *slot, TValue *value);
+LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
+LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
 LUAI_FUNC Table *luaH_new (lua_State *L);
 LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
                                                     unsigned int nhsize);
@@ -54,7 +55,6 @@ LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
 LUAI_FUNC void luaH_free (lua_State *L, Table *t);
 LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
 LUAI_FUNC lua_Unsigned luaH_getn (Table *t);
-LUAI_FUNC unsigned int luaH_realasize (const Table *t);
 
 
 #if defined(LUA_DEBUG)

ltablib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltablib.c $
+** $Id: ltablib.c,v 1.93.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Library for Table Manipulation
 ** See Copyright Notice in lua.h
 */
@@ -58,6 +58,24 @@ static void checktab (lua_State *L, int arg, int what) {
 }
 
 
+#if defined(LUA_COMPAT_MAXN)
+static int maxn (lua_State *L) {
+  lua_Number max = 0;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushnil(L);  /* first key */
+  while (lua_next(L, 1)) {
+    lua_pop(L, 1);  /* remove value */
+    if (lua_type(L, -1) == LUA_TNUMBER) {
+      lua_Number v = lua_tonumber(L, -1);
+      if (v > max) max = v;
+    }
+  }
+  lua_pushnumber(L, max);
+  return 1;
+}
+#endif
+
+
 static int tinsert (lua_State *L) {
   lua_Integer e = aux_getn(L, 1, TAB_RW) + 1;  /* first empty element */
   lua_Integer pos;  /* where to insert new element */
@@ -69,9 +87,7 @@ static int tinsert (lua_State *L) {
     case 3: {
       lua_Integer i;
       pos = luaL_checkinteger(L, 2);  /* 2nd argument is the position */
-      /* check whether 'pos' is in [1, e] */
-      luaL_argcheck(L, (lua_Unsigned)pos - 1u < (lua_Unsigned)e, 2,
-                       "position out of bounds");
+      luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds");
       for (i = e; i > pos; i--) {  /* move up elements */
         lua_geti(L, 1, i - 1);
         lua_seti(L, 1, i);  /* t[i] = t[i - 1] */
@@ -91,16 +107,14 @@ static int tremove (lua_State *L) {
   lua_Integer size = aux_getn(L, 1, TAB_RW);
   lua_Integer pos = luaL_optinteger(L, 2, size);
   if (pos != size)  /* validate 'pos' if given */
-    /* check whether 'pos' is in [1, size + 1] */
-    luaL_argcheck(L, (lua_Unsigned)pos - 1u <= (lua_Unsigned)size, 1,
-                     "position out of bounds");
+    luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
   lua_geti(L, 1, pos);  /* result = t[pos] */
   for ( ; pos < size; pos++) {
     lua_geti(L, 1, pos + 1);
     lua_seti(L, 1, pos);  /* t[pos] = t[pos + 1] */
   }
   lua_pushnil(L);
-  lua_seti(L, 1, pos);  /* remove entry t[pos] */
+  lua_seti(L, 1, pos);  /* t[pos] = nil */
   return 1;
 }
 
@@ -145,8 +159,8 @@ static int tmove (lua_State *L) {
 
 static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) {
   lua_geti(L, 1, i);
-  if (l_unlikely(!lua_isstring(L, -1)))
-    luaL_error(L, "invalid value (%s) at index %I in table for 'concat'",
+  if (!lua_isstring(L, -1))
+    luaL_error(L, "invalid value (%s) at index %d in table for 'concat'",
                   luaL_typename(L, -1), i);
   luaL_addvalue(b);
 }
@@ -177,7 +191,7 @@ static int tconcat (lua_State *L) {
 ** =======================================================
 */
 
-static int tpack (lua_State *L) {
+static int pack (lua_State *L) {
   int i;
   int n = lua_gettop(L);  /* number of elements to pack */
   lua_createtable(L, n, 1);  /* create result table */
@@ -190,14 +204,13 @@ static int tpack (lua_State *L) {
 }
 
 
-static int tunpack (lua_State *L) {
+static int unpack (lua_State *L) {
   lua_Unsigned n;
   lua_Integer i = luaL_optinteger(L, 2, 1);
   lua_Integer e = luaL_opt(L, luaL_checkinteger, 3, luaL_len(L, 1));
   if (i > e) return 0;  /* empty range */
   n = (lua_Unsigned)e - i;  /* number of elements minus 1 (avoid overflows) */
-  if (l_unlikely(n >= (unsigned int)INT_MAX  ||
-                 !lua_checkstack(L, (int)(++n))))
+  if (n >= (unsigned int)INT_MAX  || !lua_checkstack(L, (int)(++n)))
     return luaL_error(L, "too many results to unpack");
   for (; i < e; i++) {  /* push arg[i..e - 1] (to avoid overflows) */
     lua_geti(L, 1, i);
@@ -300,15 +313,15 @@ static IdxT partition (lua_State *L, IdxT lo, IdxT up) {
   /* loop invariant: a[lo .. i] <= P <= a[j .. up] */
   for (;;) {
     /* next loop: repeat ++i while a[i] < P */
-    while ((void)lua_geti(L, 1, ++i), sort_comp(L, -1, -2)) {
-      if (l_unlikely(i == up - 1))  /* a[i] < P  but a[up - 1] == P  ?? */
+    while (lua_geti(L, 1, ++i), sort_comp(L, -1, -2)) {
+      if (i == up - 1)  /* a[i] < P  but a[up - 1] == P  ?? */
         luaL_error(L, "invalid order function for sorting");
       lua_pop(L, 1);  /* remove a[i] */
     }
     /* after the loop, a[i] >= P and a[lo .. i - 1] < P */
     /* next loop: repeat --j while P < a[j] */
-    while ((void)lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
-      if (l_unlikely(j < i))  /* j < i  but  a[j] > P ?? */
+    while (lua_geti(L, 1, --j), sort_comp(L, -3, -1)) {
+      if (j < i)  /* j < i  but  a[j] > P ?? */
         luaL_error(L, "invalid order function for sorting");
       lua_pop(L, 1);  /* remove a[j] */
     }
@@ -339,7 +352,7 @@ static IdxT choosePivot (IdxT lo, IdxT up, unsigned int rnd) {
 
 
 /*
-** Quicksort algorithm (recursive function)
+** QuickSort algorithm (recursive function)
 */
 static void auxsort (lua_State *L, IdxT lo, IdxT up,
                                    unsigned int rnd) {
@@ -412,9 +425,12 @@ static int sort (lua_State *L) {
 
 static const luaL_Reg tab_funcs[] = {
   {"concat", tconcat},
+#if defined(LUA_COMPAT_MAXN)
+  {"maxn", maxn},
+#endif
   {"insert", tinsert},
-  {"pack", tpack},
-  {"unpack", tunpack},
+  {"pack", pack},
+  {"unpack", unpack},
   {"remove", tremove},
   {"move", tmove},
   {"sort", sort},
@@ -424,6 +440,11 @@ static const luaL_Reg tab_funcs[] = {
 
 LUAMOD_API int luaopen_table (lua_State *L) {
   luaL_newlib(L, tab_funcs);
+#if defined(LUA_COMPAT_UNPACK)
+  /* _G.unpack = table.unpack */
+  lua_getfield(L, -1, "unpack");
+  lua_setglobal(L, "unpack");
+#endif
   return 1;
 }
 

ltests.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h $
+** $Id: ltests.h,v 2.50.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -8,19 +8,29 @@
 #define ltests_h
 
 
-#include <stdio.h>
 #include <stdlib.h>
 
-/* test Lua with compatibility code */
-#define LUA_COMPAT_MATHLIB
-#define LUA_COMPAT_LT_LE
+/* test Lua with no compatibility code */
+#undef LUA_COMPAT_MATHLIB
+#undef LUA_COMPAT_IPAIRS
+#undef LUA_COMPAT_BITLIB
+#undef LUA_COMPAT_APIINTCASTS
+#undef LUA_COMPAT_FLOATSTRING
+#undef LUA_COMPAT_UNPACK
+#undef LUA_COMPAT_LOADERS
+#undef LUA_COMPAT_LOG10
+#undef LUA_COMPAT_LOADSTRING
+#undef LUA_COMPAT_MAXN
+#undef LUA_COMPAT_MODULE
 
 
 #define LUA_DEBUG
 
 
 /* turn on assertions */
-#define LUAI_ASSERT
+#undef NDEBUG
+#include <assert.h>
+#define lua_assert(c)           assert(c)
 
 
 /* to avoid warnings, and to make sure value is really unused */
@@ -36,23 +46,13 @@
 #endif
 
 
-/* get a chance to test code without jump tables */
-#define LUA_USE_JUMPTABLE	0
-
-
-/* use 32-bit integers in random generator */
-#define LUA_RAND32
-
-
 /* memory-allocator control variables */
 typedef struct Memcontrol {
-  int failnext;
   unsigned long numblocks;
   unsigned long total;
   unsigned long maxmem;
   unsigned long memlimit;
-  unsigned long countlimit;
-  unsigned long objcount[LUA_NUMTYPES];
+  unsigned long objcount[LUA_NUMTAGS];
 } Memcontrol;
 
 LUA_API Memcontrol l_memcontrol;
@@ -68,13 +68,7 @@ extern void *l_Trick;
 /*
 ** Function to traverse and check all memory used by Lua
 */
-LUAI_FUNC int lua_checkmemory (lua_State *L);
-
-/*
-** Function to print an object GC-friendly
-*/
-struct GCObject;
-LUAI_FUNC void lua_printobj (lua_State *L, struct GCObject *o);
+int lua_checkmemory (lua_State *L);
 
 
 /* test for lock/unlock */
@@ -116,13 +110,7 @@ LUA_API void *debug_realloc (void *ud, void *block,
 #undef LUAL_BUFFERSIZE
 #define LUAL_BUFFERSIZE		23
 #define MINSTRTABSIZE		2
-#define MAXIWTHABS		3
-
-#define STRCACHE_N	23
-#define STRCACHE_M	5
-
-#undef LUAI_USER_ALIGNMENT_T
-#define LUAI_USER_ALIGNMENT_T   union { char b[sizeof(void*) * 8]; }
+#define MAXINDEXRK		1
 
 
 /* make stack-overflow tests run faster */
@@ -130,15 +118,12 @@ LUA_API void *debug_realloc (void *ud, void *block,
 #define LUAI_MAXSTACK   50000
 
 
-/* test mode uses more stack space */
-#undef LUAI_MAXCCALLS
-#define LUAI_MAXCCALLS	180
+#undef LUAI_USER_ALIGNMENT_T
+#define LUAI_USER_ALIGNMENT_T   union { char b[sizeof(void*) * 8]; }
 
 
-/* force Lua to use its own implementations */
-#undef lua_strx2number
-#undef lua_number2strx
-
+#define STRCACHE_N	23
+#define STRCACHE_M	5
 
 #endif
 

ltm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c $
+** $Id: ltm.c,v 2.38.1.1 2017/04/19 17:39:34 roberto Exp $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -16,7 +16,6 @@
 
 #include "ldebug.h"
 #include "ldo.h"
-#include "lgc.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
@@ -27,11 +26,11 @@
 
 static const char udatatypename[] = "userdata";
 
-LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTYPES] = {
+LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
   "no value",
   "nil", "boolean", udatatypename, "number",
   "string", "table", "function", udatatypename, "thread",
-  "upvalue", "proto" /* these last cases are used for tests only */
+  "proto" /* this last case is used for tests only */
 };
 
 
@@ -43,7 +42,7 @@ void luaT_init (lua_State *L) {
     "__div", "__idiv",
     "__band", "__bor", "__bxor", "__shl", "__shr",
     "__unm", "__bnot", "__lt", "__le",
-    "__concat", "__call", "__close"
+    "__concat", "__call"
   };
   int i;
   for (i=0; i<TM_N; i++) {
@@ -60,7 +59,7 @@ void luaT_init (lua_State *L) {
 const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
   const TValue *tm = luaH_getshortstr(events, ename);
   lua_assert(event <= TM_EQ);
-  if (notm(tm)) {  /* no tag method? */
+  if (ttisnil(tm)) {  /* no tag method? */
     events->flags |= cast_byte(1u<<event);  /* cache this fact */
     return NULL;
   }
@@ -70,7 +69,7 @@ const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
 
 const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
   Table *mt;
-  switch (ttype(o)) {
+  switch (ttnov(o)) {
     case LUA_TTABLE:
       mt = hvalue(o)->metatable;
       break;
@@ -78,9 +77,9 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
       mt = uvalue(o)->metatable;
       break;
     default:
-      mt = G(L)->mt[ttype(o)];
+      mt = G(L)->mt[ttnov(o)];
   }
-  return (mt ? luaH_getshortstr(mt, G(L)->tmname[event]) : &G(L)->nilvalue);
+  return (mt ? luaH_getshortstr(mt, G(L)->tmname[event]) : luaO_nilobject);
 }
 
 
@@ -96,62 +95,54 @@ const char *luaT_objtypename (lua_State *L, const TValue *o) {
     if (ttisstring(name))  /* is '__name' a string? */
       return getstr(tsvalue(name));  /* use it as type name */
   }
-  return ttypename(ttype(o));  /* else use standard type name */
+  return ttypename(ttnov(o));  /* else use standard type name */
 }
 
 
 void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
-                  const TValue *p2, const TValue *p3) {
-  StkId func = L->top;
-  setobj2s(L, func, f);  /* push function (assume EXTRA_STACK) */
-  setobj2s(L, func + 1, p1);  /* 1st argument */
-  setobj2s(L, func + 2, p2);  /* 2nd argument */
-  setobj2s(L, func + 3, p3);  /* 3rd argument */
-  L->top = func + 4;
-  /* metamethod may yield only when called from Lua code */
-  if (isLuacode(L->ci))
-    luaD_call(L, func, 0);
-  else
-    luaD_callnoyield(L, func, 0);
-}
-
-
-void luaT_callTMres (lua_State *L, const TValue *f, const TValue *p1,
-                     const TValue *p2, StkId res) {
-  ptrdiff_t result = savestack(L, res);
+                  const TValue *p2, TValue *p3, int hasres) {
+  ptrdiff_t result = savestack(L, p3);
   StkId func = L->top;
   setobj2s(L, func, f);  /* push function (assume EXTRA_STACK) */
   setobj2s(L, func + 1, p1);  /* 1st argument */
   setobj2s(L, func + 2, p2);  /* 2nd argument */
   L->top += 3;
+  if (!hasres)  /* no result? 'p3' is third argument */
+    setobj2s(L, L->top++, p3);  /* 3rd argument */
   /* metamethod may yield only when called from Lua code */
-  if (isLuacode(L->ci))
-    luaD_call(L, func, 1);
+  if (isLua(L->ci))
+    luaD_call(L, func, hasres);
   else
-    luaD_callnoyield(L, func, 1);
-  res = restorestack(L, result);
-  setobjs2s(L, res, --L->top);  /* move result to its place */
+    luaD_callnoyield(L, func, hasres);
+  if (hasres) {  /* if has result, move it to its place */
+    p3 = restorestack(L, result);
+    setobjs2s(L, p3, --L->top);
+  }
 }
 
 
-static int callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
-                      StkId res, TMS event) {
+int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                    StkId res, TMS event) {
   const TValue *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */
-  if (notm(tm))
+  if (ttisnil(tm))
     tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
-  if (notm(tm)) return 0;
-  luaT_callTMres(L, tm, p1, p2, res);
+  if (ttisnil(tm)) return 0;
+  luaT_callTM(L, tm, p1, p2, res, 1);
   return 1;
 }
 
 
 void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
                     StkId res, TMS event) {
-  if (l_unlikely(!callbinTM(L, p1, p2, res, event))) {
+  if (!luaT_callbinTM(L, p1, p2, res, event)) {
     switch (event) {
+      case TM_CONCAT:
+        luaG_concaterror(L, p1, p2);
+      /* call never returns, but to avoid warnings: *//* FALLTHROUGH */
       case TM_BAND: case TM_BOR: case TM_BXOR:
       case TM_SHL: case TM_SHR: case TM_BNOT: {
-        if (ttisnumber(p1) && ttisnumber(p2))
+        lua_Number dummy;
+        if (tonumber(p1, &dummy) && tonumber(p2, &dummy))
           luaG_tointerror(L, p1, p2);
         else
           luaG_opinterror(L, p1, p2, "perform bitwise operation on");
@@ -164,108 +155,11 @@ void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
 }
 
 
-void luaT_tryconcatTM (lua_State *L) {
-  StkId top = L->top;
-  if (l_unlikely(!callbinTM(L, s2v(top - 2), s2v(top - 1), top - 2,
-                               TM_CONCAT)))
-    luaG_concaterror(L, s2v(top - 2), s2v(top - 1));
-}
-
-
-void luaT_trybinassocTM (lua_State *L, const TValue *p1, const TValue *p2,
-                                       int flip, StkId res, TMS event) {
-  if (flip)
-    luaT_trybinTM(L, p2, p1, res, event);
-  else
-    luaT_trybinTM(L, p1, p2, res, event);
-}
-
-
-void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2,
-                                   int flip, StkId res, TMS event) {
-  TValue aux;
-  setivalue(&aux, i2);
-  luaT_trybinassocTM(L, p1, &aux, flip, res, event);
-}
-
-
-/*
-** Calls an order tag method.
-** For lessequal, LUA_COMPAT_LT_LE keeps compatibility with old
-** behavior: if there is no '__le', try '__lt', based on l <= r iff
-** !(r < l) (assuming a total order). If the metamethod yields during
-** this substitution, the continuation has to know about it (to negate
-** the result of r<l); bit CIST_LEQ in the call status keeps that
-** information.
-*/
 int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2,
                       TMS event) {
-  if (callbinTM(L, p1, p2, L->top, event))  /* try original event */
-    return !l_isfalse(s2v(L->top));
-#if defined(LUA_COMPAT_LT_LE)
-  else if (event == TM_LE) {
-      /* try '!(p2 < p1)' for '(p1 <= p2)' */
-      L->ci->callstatus |= CIST_LEQ;  /* mark it is doing 'lt' for 'le' */
-      if (callbinTM(L, p2, p1, L->top, TM_LT)) {
-        L->ci->callstatus ^= CIST_LEQ;  /* clear mark */
-        return l_isfalse(s2v(L->top));
-      }
-      /* else error will remove this 'ci'; no need to clear mark */
-  }
-#endif
-  luaG_ordererror(L, p1, p2);  /* no metamethod found */
-  return 0;  /* to avoid warnings */
-}
-
-
-int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2,
-                       int flip, int isfloat, TMS event) {
-  TValue aux; const TValue *p2;
-  if (isfloat) {
-    setfltvalue(&aux, cast_num(v2));
-  }
+  if (!luaT_callbinTM(L, p1, p2, L->top, event))
+    return -1;  /* no metamethod */
   else
-    setivalue(&aux, v2);
-  if (flip) {  /* arguments were exchanged? */
-    p2 = p1; p1 = &aux;  /* correct them */
-  }
-  else
-    p2 = &aux;
-  return luaT_callorderTM(L, p1, p2, event);
-}
-
-
-void luaT_adjustvarargs (lua_State *L, int nfixparams, CallInfo *ci,
-                         const Proto *p) {
-  int i;
-  int actual = cast_int(L->top - ci->func) - 1;  /* number of arguments */
-  int nextra = actual - nfixparams;  /* number of extra arguments */
-  ci->u.l.nextraargs = nextra;
-  luaD_checkstack(L, p->maxstacksize + 1);
-  /* copy function to the top of the stack */
-  setobjs2s(L, L->top++, ci->func);
-  /* move fixed parameters to the top of the stack */
-  for (i = 1; i <= nfixparams; i++) {
-    setobjs2s(L, L->top++, ci->func + i);
-    setnilvalue(s2v(ci->func + i));  /* erase original parameter (for GC) */
-  }
-  ci->func += actual + 1;
-  ci->top += actual + 1;
-  lua_assert(L->top <= ci->top && ci->top <= L->stack_last);
-}
-
-
-void luaT_getvarargs (lua_State *L, CallInfo *ci, StkId where, int wanted) {
-  int i;
-  int nextra = ci->u.l.nextraargs;
-  if (wanted < 0) {
-    wanted = nextra;  /* get all extra arguments available */
-    checkstackGCp(L, nextra, where);  /* ensure stack space */
-    L->top = where + nextra;  /* next instruction will need top */
-  }
-  for (i = 0; i < wanted && i < nextra; i++)
-    setobjs2s(L, where + i, ci->func - nextra + i);
-  for (; i < wanted; i++)   /* complete required results with nil */
-    setnilvalue(s2v(where + i));
+    return !l_isfalse(L->top);
 }
 

ltm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h $
+** $Id: ltm.h,v 2.22.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -40,26 +40,10 @@ typedef enum {
   TM_LE,
   TM_CONCAT,
   TM_CALL,
-  TM_CLOSE,
   TM_N		/* number of elements in the enum */
 } TMS;
 
 
-/*
-** Mask with 1 in all fast-access methods. A 1 in any of these bits
-** in the flag of a (meta)table means the metatable does not have the
-** corresponding metamethod field. (Bit 7 of the flag is used for
-** 'isrealasize'.)
-*/
-#define maskflags	(~(~0u << (TM_EQ + 1)))
-
-
-/*
-** Test whether there is no tagmethod.
-** (Because tagmethods use raw accesses, the result may be an "empty" nil.)
-*/
-#define notm(tm)	ttisnil(tm)
-
 
 #define gfasttm(g,et,e) ((et) == NULL ? NULL : \
   ((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))
@@ -68,7 +52,7 @@ typedef enum {
 
 #define ttypename(x)	luaT_typenames_[(x) + 1]
 
-LUAI_DDEC(const char *const luaT_typenames_[LUA_TOTALTYPES];)
+LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
 
 
 LUAI_FUNC const char *luaT_objtypename (lua_State *L, const TValue *o);
@@ -79,25 +63,14 @@ LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
 LUAI_FUNC void luaT_init (lua_State *L);
 
 LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
-                            const TValue *p2, const TValue *p3);
-LUAI_FUNC void luaT_callTMres (lua_State *L, const TValue *f,
-                            const TValue *p1, const TValue *p2, StkId p3);
+                            const TValue *p2, TValue *p3, int hasres);
+LUAI_FUNC int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                              StkId res, TMS event);
 LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
                               StkId res, TMS event);
-LUAI_FUNC void luaT_tryconcatTM (lua_State *L);
-LUAI_FUNC void luaT_trybinassocTM (lua_State *L, const TValue *p1,
-       const TValue *p2, int inv, StkId res, TMS event);
-LUAI_FUNC void luaT_trybiniTM (lua_State *L, const TValue *p1, lua_Integer i2,
-                               int inv, StkId res, TMS event);
 LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1,
                                 const TValue *p2, TMS event);
-LUAI_FUNC int luaT_callorderiTM (lua_State *L, const TValue *p1, int v2,
-                                 int inv, int isfloat, TMS event);
 
-LUAI_FUNC void luaT_adjustvarargs (lua_State *L, int nfixparams,
-                                   struct CallInfo *ci, const Proto *p);
-LUAI_FUNC void luaT_getvarargs (lua_State *L, struct CallInfo *ci,
-                                              StkId where, int wanted);
 
 
 #endif

lua.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c $
+** $Id: lua.c,v 1.230.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -9,22 +9,31 @@
 #include "lprefix.h"
 
 
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include <signal.h>
-
 #include "lua.h"
 
 #include "lauxlib.h"
 #include "lualib.h"
 
 
+
+#if !defined(LUA_PROMPT)
+#define LUA_PROMPT		"> "
+#define LUA_PROMPT2		">> "
+#endif
+
 #if !defined(LUA_PROGNAME)
 #define LUA_PROGNAME		"lua"
 #endif
 
+#if !defined(LUA_MAXINPUT)
+#define LUA_MAXINPUT		512
+#endif
+
 #if !defined(LUA_INIT_VAR)
 #define LUA_INIT_VAR		"LUA_INIT"
 #endif
@@ -32,31 +41,70 @@
 #define LUA_INITVARVERSION	LUA_INIT_VAR LUA_VERSUFFIX
 
 
+/*
+** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
+** is, whether we're running lua interactively).
+*/
+#if !defined(lua_stdin_is_tty)	/* { */
+
+#if defined(LUA_USE_POSIX)	/* { */
+
+#include <unistd.h>
+#define lua_stdin_is_tty()	isatty(0)
+
+#elif defined(LUA_USE_WINDOWS)	/* }{ */
+
+#include <io.h>
+#include <windows.h>
+
+#define lua_stdin_is_tty()	_isatty(_fileno(stdin))
+
+#else				/* }{ */
+
+/* ISO C definition */
+#define lua_stdin_is_tty()	1  /* assume stdin is a tty */
+
+#endif				/* } */
+
+#endif				/* } */
+
+
+/*
+** lua_readline defines how to show a prompt and then read a line from
+** the standard input.
+** lua_saveline defines how to "save" a read line in a "history".
+** lua_freeline defines how to free a line read by lua_readline.
+*/
+#if !defined(lua_readline)	/* { */
+
+#if defined(LUA_USE_READLINE)	/* { */
+
+#include <readline/readline.h>
+#include <readline/history.h>
+#define lua_readline(L,b,p)	((void)L, ((b)=readline(p)) != NULL)
+#define lua_saveline(L,line)	((void)L, add_history(line))
+#define lua_freeline(L,b)	((void)L, free(b))
+
+#else				/* }{ */
+
+#define lua_readline(L,b,p) \
+        ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
+        fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
+#define lua_saveline(L,line)	{ (void)L; (void)line; }
+#define lua_freeline(L,b)	{ (void)L; (void)b; }
+
+#endif				/* } */
+
+#endif				/* } */
+
+
+
+
 static lua_State *globalL = NULL;
 
 static const char *progname = LUA_PROGNAME;
 
 
-#if defined(LUA_USE_POSIX)   /* { */
-
-/*
-** Use 'sigaction' when available.
-*/
-static void setsignal (int sig, void (*handler)(int)) {
-  struct sigaction sa;
-  sa.sa_handler = handler;
-  sa.sa_flags = 0;
-  sigemptyset(&sa.sa_mask);  /* do not mask any signal */
-  sigaction(sig, &sa, NULL);
-}
-
-#else           /* }{ */
-
-#define setsignal            signal
-
-#endif                               /* } */
-
-
 /*
 ** Hook set by signal function to stop the interpreter.
 */
@@ -74,9 +122,8 @@ static void lstop (lua_State *L, lua_Debug *ar) {
 ** interpreter.
 */
 static void laction (int i) {
-  int flag = LUA_MASKCALL | LUA_MASKRET | LUA_MASKLINE | LUA_MASKCOUNT;
-  setsignal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
-  lua_sethook(globalL, lstop, flag, 1);
+  signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
+  lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
 }
 
 
@@ -94,7 +141,6 @@ static void print_usage (const char *badoption) {
   "  -l name  require library 'name' into global 'name'\n"
   "  -v       show version information\n"
   "  -E       ignore environment variables\n"
-  "  -W       turn warnings on\n"
   "  --       stop handling options\n"
   "  -        stop handling options and execute stdin\n"
   ,
@@ -155,9 +201,9 @@ static int docall (lua_State *L, int narg, int nres) {
   lua_pushcfunction(L, msghandler);  /* push message handler */
   lua_insert(L, base);  /* put it under function and args */
   globalL = L;  /* to be available to 'laction' */
-  setsignal(SIGINT, laction);  /* set C-signal handler */
+  signal(SIGINT, laction);  /* set C-signal handler */
   status = lua_pcall(L, narg, nres, base);
-  setsignal(SIGINT, SIG_DFL); /* reset C-signal handler */
+  signal(SIGINT, SIG_DFL); /* reset C-signal handler */
   lua_remove(L, base);  /* remove message handler from the stack */
   return status;
 }
@@ -222,232 +268,14 @@ static int dolibrary (lua_State *L, const char *name) {
 
 
 /*
-** Push on the stack the contents of table 'arg' from 1 to #arg
-*/
-static int pushargs (lua_State *L) {
-  int i, n;
-  if (lua_getglobal(L, "arg") != LUA_TTABLE)
-    luaL_error(L, "'arg' is not a table");
-  n = (int)luaL_len(L, -1);
-  luaL_checkstack(L, n + 3, "too many arguments to script");
-  for (i = 1; i <= n; i++)
-    lua_rawgeti(L, -i, i);
-  lua_remove(L, -i);  /* remove table from the stack */
-  return n;
-}
-
-
-static int handle_script (lua_State *L, char **argv) {
-  int status;
-  const char *fname = argv[0];
-  if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
-    fname = NULL;  /* stdin */
-  status = luaL_loadfile(L, fname);
-  if (status == LUA_OK) {
-    int n = pushargs(L);  /* push arguments to script */
-    status = docall(L, n, LUA_MULTRET);
-  }
-  return report(L, status);
-}
-
-
-/* bits of various argument indicators in 'args' */
-#define has_error	1	/* bad option */
-#define has_i		2	/* -i */
-#define has_v		4	/* -v */
-#define has_e		8	/* -e */
-#define has_E		16	/* -E */
-
-
-/*
-** Traverses all arguments from 'argv', returning a mask with those
-** needed before running any Lua code (or an error code if it finds
-** any invalid argument). 'first' returns the first not-handled argument
-** (either the script name or a bad argument in case of error).
-*/
-static int collectargs (char **argv, int *first) {
-  int args = 0;
-  int i;
-  for (i = 1; argv[i] != NULL; i++) {
-    *first = i;
-    if (argv[i][0] != '-')  /* not an option? */
-        return args;  /* stop handling options */
-    switch (argv[i][1]) {  /* else check option */
-      case '-':  /* '--' */
-        if (argv[i][2] != '\0')  /* extra characters after '--'? */
-          return has_error;  /* invalid option */
-        *first = i + 1;
-        return args;
-      case '\0':  /* '-' */
-        return args;  /* script "name" is '-' */
-      case 'E':
-        if (argv[i][2] != '\0')  /* extra characters? */
-          return has_error;  /* invalid option */
-        args |= has_E;
-        break;
-      case 'W':
-        if (argv[i][2] != '\0')  /* extra characters? */
-          return has_error;  /* invalid option */
-        break;
-      case 'i':
-        args |= has_i;  /* (-i implies -v) *//* FALLTHROUGH */
-      case 'v':
-        if (argv[i][2] != '\0')  /* extra characters? */
-          return has_error;  /* invalid option */
-        args |= has_v;
-        break;
-      case 'e':
-        args |= has_e;  /* FALLTHROUGH */
-      case 'l':  /* both options need an argument */
-        if (argv[i][2] == '\0') {  /* no concatenated argument? */
-          i++;  /* try next 'argv' */
-          if (argv[i] == NULL || argv[i][0] == '-')
-            return has_error;  /* no next argument or it is another option */
-        }
-        break;
-      default:  /* invalid option */
-        return has_error;
-    }
-  }
-  *first = i;  /* no script name */
-  return args;
-}
-
-
-/*
-** Processes options 'e' and 'l', which involve running Lua code, and
-** 'W', which also affects the state.
-** Returns 0 if some code raises an error.
-*/
-static int runargs (lua_State *L, char **argv, int n) {
-  int i;
-  for (i = 1; i < n; i++) {
-    int option = argv[i][1];
-    lua_assert(argv[i][0] == '-');  /* already checked */
-    switch (option) {
-      case 'e':  case 'l': {
-        int status;
-        const char *extra = argv[i] + 2;  /* both options need an argument */
-        if (*extra == '\0') extra = argv[++i];
-        lua_assert(extra != NULL);
-        status = (option == 'e')
-                 ? dostring(L, extra, "=(command line)")
-                 : dolibrary(L, extra);
-        if (status != LUA_OK) return 0;
-        break;
-      }
-      case 'W':
-        lua_warning(L, "@on", 0);  /* warnings on */
-        break;
-    }
-  }
-  return 1;
-}
-
-
-static int handle_luainit (lua_State *L) {
-  const char *name = "=" LUA_INITVARVERSION;
-  const char *init = getenv(name + 1);
-  if (init == NULL) {
-    name = "=" LUA_INIT_VAR;
-    init = getenv(name + 1);  /* try alternative name */
-  }
-  if (init == NULL) return LUA_OK;
-  else if (init[0] == '@')
-    return dofile(L, init+1);
-  else
-    return dostring(L, init, name);
-}
-
-
-/*
-** {==================================================================
-** Read-Eval-Print Loop (REPL)
-** ===================================================================
-*/
-
-#if !defined(LUA_PROMPT)
-#define LUA_PROMPT		"> "
-#define LUA_PROMPT2		">> "
-#endif
-
-#if !defined(LUA_MAXINPUT)
-#define LUA_MAXINPUT		512
-#endif
-
-
-/*
-** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
-** is, whether we're running lua interactively).
-*/
-#if !defined(lua_stdin_is_tty)	/* { */
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#include <unistd.h>
-#define lua_stdin_is_tty()	isatty(0)
-
-#elif defined(LUA_USE_WINDOWS)	/* }{ */
-
-#include <io.h>
-#include <windows.h>
-
-#define lua_stdin_is_tty()	_isatty(_fileno(stdin))
-
-#else				/* }{ */
-
-/* ISO C definition */
-#define lua_stdin_is_tty()	1  /* assume stdin is a tty */
-
-#endif				/* } */
-
-#endif				/* } */
-
-
-/*
-** lua_readline defines how to show a prompt and then read a line from
-** the standard input.
-** lua_saveline defines how to "save" a read line in a "history".
-** lua_freeline defines how to free a line read by lua_readline.
-*/
-#if !defined(lua_readline)	/* { */
-
-#if defined(LUA_USE_READLINE)	/* { */
-
-#include <readline/readline.h>
-#include <readline/history.h>
-#define lua_initreadline(L)	((void)L, rl_readline_name="lua")
-#define lua_readline(L,b,p)	((void)L, ((b)=readline(p)) != NULL)
-#define lua_saveline(L,line)	((void)L, add_history(line))
-#define lua_freeline(L,b)	((void)L, free(b))
-
-#else				/* }{ */
-
-#define lua_initreadline(L)  ((void)L)
-#define lua_readline(L,b,p) \
-        ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
-        fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
-#define lua_saveline(L,line)	{ (void)L; (void)line; }
-#define lua_freeline(L,b)	{ (void)L; (void)b; }
-
-#endif				/* } */
-
-#endif				/* } */
-
-
-/*
-** Return the string to be used as a prompt by the interpreter. Leave
-** the string (or nil, if using the default value) on the stack, to keep
-** it anchored.
+** Returns the string to be used as a prompt by the interpreter.
 */
 static const char *get_prompt (lua_State *L, int firstline) {
-  if (lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2") == LUA_TNIL)
-    return (firstline ? LUA_PROMPT : LUA_PROMPT2);  /* use the default */
-  else {  /* apply 'tostring' over the value */
-    const char *p = luaL_tolstring(L, -1, NULL);
-    lua_remove(L, -2);  /* remove original value */
-    return p;
-  }
+  const char *p;
+  lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
+  p = lua_tostring(L, -1);
+  if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
+  return p;
 }
 
 /* mark in error messages for incomplete statements */
@@ -578,7 +406,6 @@ static void doREPL (lua_State *L) {
   int status;
   const char *oldprogname = progname;
   progname = NULL;  /* no 'progname' on errors in interactive mode */
-  lua_initreadline(L);
   while ((status = loadline(L)) != -1) {
     if (status == LUA_OK)
       status = docall(L, 0, LUA_MULTRET);
@@ -590,7 +417,134 @@ static void doREPL (lua_State *L) {
   progname = oldprogname;
 }
 
-/* }================================================================== */
+
+/*
+** Push on the stack the contents of table 'arg' from 1 to #arg
+*/
+static int pushargs (lua_State *L) {
+  int i, n;
+  if (lua_getglobal(L, "arg") != LUA_TTABLE)
+    luaL_error(L, "'arg' is not a table");
+  n = (int)luaL_len(L, -1);
+  luaL_checkstack(L, n + 3, "too many arguments to script");
+  for (i = 1; i <= n; i++)
+    lua_rawgeti(L, -i, i);
+  lua_remove(L, -i);  /* remove table from the stack */
+  return n;
+}
+
+
+static int handle_script (lua_State *L, char **argv) {
+  int status;
+  const char *fname = argv[0];
+  if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
+    fname = NULL;  /* stdin */
+  status = luaL_loadfile(L, fname);
+  if (status == LUA_OK) {
+    int n = pushargs(L);  /* push arguments to script */
+    status = docall(L, n, LUA_MULTRET);
+  }
+  return report(L, status);
+}
+
+
+
+/* bits of various argument indicators in 'args' */
+#define has_error	1	/* bad option */
+#define has_i		2	/* -i */
+#define has_v		4	/* -v */
+#define has_e		8	/* -e */
+#define has_E		16	/* -E */
+
+/*
+** Traverses all arguments from 'argv', returning a mask with those
+** needed before running any Lua code (or an error code if it finds
+** any invalid argument). 'first' returns the first not-handled argument
+** (either the script name or a bad argument in case of error).
+*/
+static int collectargs (char **argv, int *first) {
+  int args = 0;
+  int i;
+  for (i = 1; argv[i] != NULL; i++) {
+    *first = i;
+    if (argv[i][0] != '-')  /* not an option? */
+        return args;  /* stop handling options */
+    switch (argv[i][1]) {  /* else check option */
+      case '-':  /* '--' */
+        if (argv[i][2] != '\0')  /* extra characters after '--'? */
+          return has_error;  /* invalid option */
+        *first = i + 1;
+        return args;
+      case '\0':  /* '-' */
+        return args;  /* script "name" is '-' */
+      case 'E':
+        if (argv[i][2] != '\0')  /* extra characters after 1st? */
+          return has_error;  /* invalid option */
+        args |= has_E;
+        break;
+      case 'i':
+        args |= has_i;  /* (-i implies -v) *//* FALLTHROUGH */
+      case 'v':
+        if (argv[i][2] != '\0')  /* extra characters after 1st? */
+          return has_error;  /* invalid option */
+        args |= has_v;
+        break;
+      case 'e':
+        args |= has_e;  /* FALLTHROUGH */
+      case 'l':  /* both options need an argument */
+        if (argv[i][2] == '\0') {  /* no concatenated argument? */
+          i++;  /* try next 'argv' */
+          if (argv[i] == NULL || argv[i][0] == '-')
+            return has_error;  /* no next argument or it is another option */
+        }
+        break;
+      default:  /* invalid option */
+        return has_error;
+    }
+  }
+  *first = i;  /* no script name */
+  return args;
+}
+
+
+/*
+** Processes options 'e' and 'l', which involve running Lua code.
+** Returns 0 if some code raises an error.
+*/
+static int runargs (lua_State *L, char **argv, int n) {
+  int i;
+  for (i = 1; i < n; i++) {
+    int option = argv[i][1];
+    lua_assert(argv[i][0] == '-');  /* already checked */
+    if (option == 'e' || option == 'l') {
+      int status;
+      const char *extra = argv[i] + 2;  /* both options need an argument */
+      if (*extra == '\0') extra = argv[++i];
+      lua_assert(extra != NULL);
+      status = (option == 'e')
+               ? dostring(L, extra, "=(command line)")
+               : dolibrary(L, extra);
+      if (status != LUA_OK) return 0;
+    }
+  }
+  return 1;
+}
+
+
+
+static int handle_luainit (lua_State *L) {
+  const char *name = "=" LUA_INITVARVERSION;
+  const char *init = getenv(name + 1);
+  if (init == NULL) {
+    name = "=" LUA_INIT_VAR;
+    init = getenv(name + 1);  /* try alternative name */
+  }
+  if (init == NULL) return LUA_OK;
+  else if (init[0] == '@')
+    return dofile(L, init+1);
+  else
+    return dostring(L, init, name);
+}
 
 
 /*
@@ -616,7 +570,6 @@ static int pmain (lua_State *L) {
   }
   luaL_openlibs(L);  /* open standard libraries */
   createargtable(L, argv, argc, script);  /* create table 'arg' */
-  lua_gc(L, LUA_GCGEN, 0, 0);  /* GC in generational mode */
   if (!(args & has_E)) {  /* no option '-E'? */
     if (handle_luainit(L) != LUA_OK)  /* run LUA_INIT */
       return 0;  /* error running LUA_INIT */

lua.h

@@ -1,5 +1,4 @@
 /*
-** $Id: lua.h $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -17,15 +16,13 @@
 
 
 #define LUA_VERSION_MAJOR	"5"
-#define LUA_VERSION_MINOR	"4"
-#define LUA_VERSION_RELEASE	"3"
-
-#define LUA_VERSION_NUM			504
-#define LUA_VERSION_RELEASE_NUM		(LUA_VERSION_NUM * 100 + 0)
+#define LUA_VERSION_MINOR	"3"
+#define LUA_VERSION_NUM		503
+#define LUA_VERSION_RELEASE	"6"
 
 #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
-#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2021 Lua.org, PUC-Rio"
+#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2020 Lua.org, PUC-Rio"
 #define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
 
 
@@ -51,7 +48,8 @@
 #define LUA_ERRRUN	2
 #define LUA_ERRSYNTAX	3
 #define LUA_ERRMEM	4
-#define LUA_ERRERR	5
+#define LUA_ERRGCMM	5
+#define LUA_ERRERR	6
 
 
 typedef struct lua_State lua_State;
@@ -72,7 +70,7 @@ typedef struct lua_State lua_State;
 #define LUA_TUSERDATA		7
 #define LUA_TTHREAD		8
 
-#define LUA_NUMTYPES		9
+#define LUA_NUMTAGS		9
 
 
 
@@ -125,13 +123,6 @@ typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
 typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
 
 
-/*
-** Type for warning functions
-*/
-typedef void (*lua_WarnFunction) (void *ud, const char *msg, int tocont);
-
-
-
 
 /*
 ** generic extra include file
@@ -153,12 +144,11 @@ extern const char lua_ident[];
 LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
 LUA_API void       (lua_close) (lua_State *L);
 LUA_API lua_State *(lua_newthread) (lua_State *L);
-LUA_API int        (lua_resetthread) (lua_State *L);
 
 LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
 
 
-LUA_API lua_Number (lua_version) (lua_State *L);
+LUA_API const lua_Number *(lua_version) (lua_State *L);
 
 
 /*
@@ -191,7 +181,7 @@ LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
 LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
 LUA_API int             (lua_toboolean) (lua_State *L, int idx);
 LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
-LUA_API lua_Unsigned    (lua_rawlen) (lua_State *L, int idx);
+LUA_API size_t          (lua_rawlen) (lua_State *L, int idx);
 LUA_API lua_CFunction   (lua_tocfunction) (lua_State *L, int idx);
 LUA_API void	       *(lua_touserdata) (lua_State *L, int idx);
 LUA_API lua_State      *(lua_tothread) (lua_State *L, int idx);
@@ -256,9 +246,9 @@ LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
 LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);
 
 LUA_API void  (lua_createtable) (lua_State *L, int narr, int nrec);
-LUA_API void *(lua_newuserdatauv) (lua_State *L, size_t sz, int nuvalue);
+LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
 LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
-LUA_API int  (lua_getiuservalue) (lua_State *L, int idx, int n);
+LUA_API int  (lua_getuservalue) (lua_State *L, int idx);
 
 
 /*
@@ -272,7 +262,7 @@ LUA_API void  (lua_rawset) (lua_State *L, int idx);
 LUA_API void  (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
 LUA_API void  (lua_rawsetp) (lua_State *L, int idx, const void *p);
 LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
-LUA_API int   (lua_setiuservalue) (lua_State *L, int idx, int n);
+LUA_API void  (lua_setuservalue) (lua_State *L, int idx);
 
 
 /*
@@ -297,21 +287,13 @@ LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
 */
 LUA_API int  (lua_yieldk)     (lua_State *L, int nresults, lua_KContext ctx,
                                lua_KFunction k);
-LUA_API int  (lua_resume)     (lua_State *L, lua_State *from, int narg,
-                               int *nres);
+LUA_API int  (lua_resume)     (lua_State *L, lua_State *from, int narg);
 LUA_API int  (lua_status)     (lua_State *L);
 LUA_API int (lua_isyieldable) (lua_State *L);
 
 #define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)
 
 
-/*
-** Warning-related functions
-*/
-LUA_API void (lua_setwarnf) (lua_State *L, lua_WarnFunction f, void *ud);
-LUA_API void (lua_warning)  (lua_State *L, const char *msg, int tocont);
-
-
 /*
 ** garbage-collection function and options
 */
@@ -325,10 +307,8 @@ LUA_API void (lua_warning)  (lua_State *L, const char *msg, int tocont);
 #define LUA_GCSETPAUSE		6
 #define LUA_GCSETSTEPMUL	7
 #define LUA_GCISRUNNING		9
-#define LUA_GCGEN		10
-#define LUA_GCINC		11
 
-LUA_API int (lua_gc) (lua_State *L, int what, ...);
+LUA_API int (lua_gc) (lua_State *L, int what, int data);
 
 
 /*
@@ -347,8 +327,6 @@ LUA_API size_t   (lua_stringtonumber) (lua_State *L, const char *s);
 LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
 LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
-LUA_API void (lua_toclose) (lua_State *L, int idx);
-LUA_API void (lua_closeslot) (lua_State *L, int idx);
 
 
 /*
@@ -398,7 +376,7 @@ LUA_API void (lua_closeslot) (lua_State *L, int idx);
 
 /*
 ** {==============================================================
-** compatibility macros
+** compatibility macros for unsigned conversions
 ** ===============================================================
 */
 #if defined(LUA_COMPAT_APIINTCASTS)
@@ -408,13 +386,6 @@ LUA_API void (lua_closeslot) (lua_State *L, int idx);
 #define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
 
 #endif
-
-#define lua_newuserdata(L,s)	lua_newuserdatauv(L,s,1)
-#define lua_getuservalue(L,idx)	lua_getiuservalue(L,idx,1)
-#define lua_setuservalue(L,idx)	lua_setiuservalue(L,idx,1)
-
-#define LUA_NUMTAGS		LUA_NUMTYPES
-
 /* }============================================================== */
 
 /*
@@ -465,7 +436,6 @@ LUA_API lua_Hook (lua_gethook) (lua_State *L);
 LUA_API int (lua_gethookmask) (lua_State *L);
 LUA_API int (lua_gethookcount) (lua_State *L);
 
-LUA_API int (lua_setcstacklimit) (lua_State *L, unsigned int limit);
 
 struct lua_Debug {
   int event;
@@ -473,7 +443,6 @@ struct lua_Debug {
   const char *namewhat;	/* (n) 'global', 'local', 'field', 'method' */
   const char *what;	/* (S) 'Lua', 'C', 'main', 'tail' */
   const char *source;	/* (S) */
-  size_t srclen;	/* (S) */
   int currentline;	/* (l) */
   int linedefined;	/* (S) */
   int lastlinedefined;	/* (S) */
@@ -481,8 +450,6 @@ struct lua_Debug {
   unsigned char nparams;/* (u) number of parameters */
   char isvararg;        /* (u) */
   char istailcall;	/* (t) */
-  unsigned short ftransfer;   /* (r) index of first value transferred */
-  unsigned short ntransfer;   /* (r) number of transferred values */
   char short_src[LUA_IDSIZE]; /* (S) */
   /* private part */
   struct CallInfo *i_ci;  /* active function */
@@ -492,7 +459,7 @@ struct lua_Debug {
 
 
 /******************************************************************************
-* Copyright (C) 1994-2021 Lua.org, PUC-Rio.
+* Copyright (C) 1994-2020 Lua.org, PUC-Rio.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h $
+** $Id: luaconf.h,v 1.259.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -14,16 +14,6 @@
 
 /*
 ** ===================================================================
-** General Configuration File for Lua
-**
-** Some definitions here can be changed externally, through the compiler
-** (e.g., with '-D' options): They are commented out or protected
-** by '#if !defined' guards. However, several other definitions
-** should be changed directly here, either because they affect the
-** Lua ABI (by making the changes here, you ensure that all software
-** connected to Lua, such as C libraries, will be compiled with the same
-** configuration); or because they are seldom changed.
-**
 ** Search for "@@" to find all configurable definitions.
 ** ===================================================================
 */
@@ -32,10 +22,20 @@
 /*
 ** {====================================================================
 ** System Configuration: macros to adapt (if needed) Lua to some
-** particular platform, for instance restricting it to C89.
+** particular platform, for instance compiling it with 32-bit numbers or
+** restricting it to C89.
 ** =====================================================================
 */
 
+/*
+@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats. You
+** can also define LUA_32BITS in the make file, but changing here you
+** ensure that all software connected to Lua will be compiled with the
+** same configuration.
+*/
+/* #define LUA_32BITS */
+
+
 /*
 @@ LUA_USE_C89 controls the use of non-ISO-C89 features.
 ** Define it if you want Lua to avoid the use of a few C99 features
@@ -61,37 +61,45 @@
 #if defined(LUA_USE_LINUX)
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
+#define LUA_USE_READLINE	/* needs some extra libraries */
 #endif
 
 
 #if defined(LUA_USE_MACOSX)
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN		/* MacOS does not need -ldl */
+#define LUA_USE_READLINE	/* needs an extra library: -lreadline */
 #endif
 
 
 /*
-@@ LUAI_IS32INT is true iff 'int' has (at least) 32 bits.
+@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
+** C89 ('long' and 'double'); Windows always has '__int64', so it does
+** not need to use this case.
 */
-#define LUAI_IS32INT	((UINT_MAX >> 30) >= 3)
-
-/* }================================================================== */
+#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
+#define LUA_C89_NUMBERS
+#endif
 
 
 
 /*
-** {==================================================================
-** Configuration for Number types. These options should not be
-** set externally, because any other code connected to Lua must
-** use the same configuration.
-** ===================================================================
+@@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'.
 */
+/* avoid undefined shifts */
+#if ((INT_MAX >> 15) >> 15) >= 1
+#define LUAI_BITSINT	32
+#else
+/* 'int' always must have at least 16 bits */
+#define LUAI_BITSINT	16
+#endif
+
 
 /*
 @@ LUA_INT_TYPE defines the type for Lua integers.
 @@ LUA_FLOAT_TYPE defines the type for Lua floats.
-** Lua should work fine with any mix of these options supported
-** by your C compiler. The usual configurations are 64-bit integers
+** Lua should work fine with any mix of these options (if supported
+** by your C compiler). The usual configurations are 64-bit integers
 ** and 'double' (the default), 32-bit integers and 'float' (for
 ** restricted platforms), and 'long'/'double' (for C compilers not
 ** compliant with C99, which may not have support for 'long long').
@@ -107,61 +115,43 @@
 #define LUA_FLOAT_DOUBLE	2
 #define LUA_FLOAT_LONGDOUBLE	3
 
-
-/* Default configuration ('long long' and 'double', for 64-bit Lua) */
-#define LUA_INT_DEFAULT		LUA_INT_LONGLONG
-#define LUA_FLOAT_DEFAULT	LUA_FLOAT_DOUBLE
-
-
-/*
-@@ LUA_32BITS enables Lua with 32-bit integers and 32-bit floats.
-*/
-#define LUA_32BITS	0
-
-
-/*
-@@ LUA_C89_NUMBERS ensures that Lua uses the largest types available for
-** C89 ('long' and 'double'); Windows always has '__int64', so it does
-** not need to use this case.
-*/
-#if defined(LUA_USE_C89) && !defined(LUA_USE_WINDOWS)
-#define LUA_C89_NUMBERS		1
-#else
-#define LUA_C89_NUMBERS		0
-#endif
-
-
-#if LUA_32BITS		/* { */
+#if defined(LUA_32BITS)		/* { */
 /*
 ** 32-bit integers and 'float'
 */
-#if LUAI_IS32INT  /* use 'int' if big enough */
+#if LUAI_BITSINT >= 32  /* use 'int' if big enough */
 #define LUA_INT_TYPE	LUA_INT_INT
 #else  /* otherwise use 'long' */
 #define LUA_INT_TYPE	LUA_INT_LONG
 #endif
 #define LUA_FLOAT_TYPE	LUA_FLOAT_FLOAT
 
-#elif LUA_C89_NUMBERS	/* }{ */
+#elif defined(LUA_C89_NUMBERS)	/* }{ */
 /*
 ** largest types available for C89 ('long' and 'double')
 */
 #define LUA_INT_TYPE	LUA_INT_LONG
 #define LUA_FLOAT_TYPE	LUA_FLOAT_DOUBLE
 
-#else		/* }{ */
-/* use defaults */
-
-#define LUA_INT_TYPE	LUA_INT_DEFAULT
-#define LUA_FLOAT_TYPE	LUA_FLOAT_DEFAULT
-
 #endif				/* } */
 
 
+/*
+** default configuration for 64-bit Lua ('long long' and 'double')
+*/
+#if !defined(LUA_INT_TYPE)
+#define LUA_INT_TYPE	LUA_INT_LONGLONG
+#endif
+
+#if !defined(LUA_FLOAT_TYPE)
+#define LUA_FLOAT_TYPE	LUA_FLOAT_DOUBLE
+#endif
+
 /* }================================================================== */
 
 
 
+
 /*
 ** {==================================================================
 ** Configuration for Paths.
@@ -189,7 +179,6 @@
 ** hierarchy or if you want to install your libraries in
 ** non-conventional directories.
 */
-
 #define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #if defined(_WIN32)	/* { */
 /*
@@ -199,40 +188,27 @@
 #define LUA_LDIR	"!\\lua\\"
 #define LUA_CDIR	"!\\"
 #define LUA_SHRDIR	"!\\..\\share\\lua\\" LUA_VDIR "\\"
-
-#if !defined(LUA_PATH_DEFAULT)
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
 		LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" \
 		LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
 		".\\?.lua;" ".\\?\\init.lua"
-#endif
-
-#if !defined(LUA_CPATH_DEFAULT)
 #define LUA_CPATH_DEFAULT \
 		LUA_CDIR"?.dll;" \
 		LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
 		LUA_CDIR"loadall.dll;" ".\\?.dll"
-#endif
 
 #else			/* }{ */
 
 #define LUA_ROOT	"/usr/local/"
 #define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR "/"
 #define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR "/"
-
-#if !defined(LUA_PATH_DEFAULT)
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
 		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
 		"./?.lua;" "./?/init.lua"
-#endif
-
-#if !defined(LUA_CPATH_DEFAULT)
 #define LUA_CPATH_DEFAULT \
 		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
-#endif
-
 #endif			/* } */
 
 
@@ -241,16 +217,12 @@
 ** CHANGE it if your machine does not use "/" as the directory separator
 ** and is not Windows. (On Windows Lua automatically uses "\".)
 */
-#if !defined(LUA_DIRSEP)
-
 #if defined(_WIN32)
 #define LUA_DIRSEP	"\\"
 #else
 #define LUA_DIRSEP	"/"
 #endif
 
-#endif
-
 /* }================================================================== */
 
 
@@ -284,18 +256,16 @@
 #endif				/* } */
 
 
-/*
-** More often than not the libs go together with the core.
-*/
+/* more often than not the libs go together with the core */
 #define LUALIB_API	LUA_API
-#define LUAMOD_API	LUA_API
+#define LUAMOD_API	LUALIB_API
 
 
 /*
 @@ LUAI_FUNC is a mark for all extern functions that are not to be
 ** exported to outside modules.
-@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables,
-** none of which to be exported to outside modules (LUAI_DDEF for
+@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
+** that are not to be exported to outside modules (LUAI_DDEF for
 ** definitions and LUAI_DDEC for declarations).
 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 ** (versions 3.2 and later) mark them as "hidden" to optimize access
@@ -307,12 +277,12 @@
 */
 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
     defined(__ELF__)		/* { */
-#define LUAI_FUNC	__attribute__((visibility("internal"))) extern
+#define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
 #else				/* }{ */
 #define LUAI_FUNC	extern
 #endif				/* } */
 
-#define LUAI_DDEC(dec)	LUAI_FUNC dec
+#define LUAI_DDEC	LUAI_FUNC
 #define LUAI_DDEF	/* empty */
 
 /* }================================================================== */
@@ -325,43 +295,88 @@
 */
 
 /*
-@@ LUA_COMPAT_5_3 controls other macros for compatibility with Lua 5.3.
+@@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2.
+@@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1.
 ** You can define it to get all options, or change specific options
 ** to fit your specific needs.
 */
-#if defined(LUA_COMPAT_5_3)	/* { */
+#if defined(LUA_COMPAT_5_2)	/* { */
 
 /*
 @@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
 ** functions in the mathematical library.
-** (These functions were already officially removed in 5.3;
-** nevertheless they are still available here.)
 */
 #define LUA_COMPAT_MATHLIB
 
+/*
+@@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'.
+*/
+#define LUA_COMPAT_BITLIB
+
+/*
+@@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod.
+*/
+#define LUA_COMPAT_IPAIRS
+
 /*
 @@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
 ** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
 ** luaL_checkint, luaL_checklong, etc.)
-** (These macros were also officially removed in 5.3, but they are still
-** available here.)
 */
 #define LUA_COMPAT_APIINTCASTS
 
+#endif				/* } */
+
+
+#if defined(LUA_COMPAT_5_1)	/* { */
+
+/* Incompatibilities from 5.2 -> 5.3 */
+#define LUA_COMPAT_MATHLIB
+#define LUA_COMPAT_APIINTCASTS
 
 /*
-@@ LUA_COMPAT_LT_LE controls the emulation of the '__le' metamethod
-** using '__lt'.
+@@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
+** You can replace it with 'table.unpack'.
 */
-#define LUA_COMPAT_LT_LE
+#define LUA_COMPAT_UNPACK
 
+/*
+@@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
+** You can replace it with 'package.searchers'.
+*/
+#define LUA_COMPAT_LOADERS
+
+/*
+@@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
+** You can call your C function directly (with light C functions).
+*/
+#define lua_cpcall(L,f,u)  \
+	(lua_pushcfunction(L, (f)), \
+	 lua_pushlightuserdata(L,(u)), \
+	 lua_pcall(L,1,0,0))
+
+
+/*
+@@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
+** You can rewrite 'log10(x)' as 'log(x, 10)'.
+*/
+#define LUA_COMPAT_LOG10
+
+/*
+@@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
+** library. You can rewrite 'loadstring(s)' as 'load(s)'.
+*/
+#define LUA_COMPAT_LOADSTRING
+
+/*
+@@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
+*/
+#define LUA_COMPAT_MAXN
 
 /*
 @@ The following macros supply trivial compatibility for some
 ** changes in the API. The macros themselves document how to
 ** change your code to avoid using them.
-** (Once more, these macros were officially removed in 5.3, but they are
-** still available here.)
 */
 #define lua_strlen(L,i)		lua_rawlen(L, (i))
 
@@ -370,31 +385,47 @@
 #define lua_equal(L,idx1,idx2)		lua_compare(L,(idx1),(idx2),LUA_OPEQ)
 #define lua_lessthan(L,idx1,idx2)	lua_compare(L,(idx1),(idx2),LUA_OPLT)
 
+/*
+@@ LUA_COMPAT_MODULE controls compatibility with previous
+** module functions 'module' (Lua) and 'luaL_register' (C).
+*/
+#define LUA_COMPAT_MODULE
+
 #endif				/* } */
 
+
+/*
+@@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a
+@@ a float mark ('.0').
+** This macro is not on by default even in compatibility mode,
+** because this is not really an incompatibility.
+*/
+/* #define LUA_COMPAT_FLOATSTRING */
+
 /* }================================================================== */
 
 
 
 /*
 ** {==================================================================
-** Configuration for Numbers (low-level part).
+** Configuration for Numbers.
 ** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
 ** satisfy your needs.
 ** ===================================================================
 */
 
 /*
+@@ LUA_NUMBER is the floating-point type used by Lua.
 @@ LUAI_UACNUMBER is the result of a 'default argument promotion'
 @@ over a floating number.
-@@ l_floatatt(x) corrects float attribute 'x' to the proper float type
+@@ l_mathlim(x) corrects limit name 'x' to the proper float type
 ** by prefixing it with one of FLT/DBL/LDBL.
 @@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
 @@ LUA_NUMBER_FMT is the format for writing floats.
 @@ lua_number2str converts a float to a string.
 @@ l_mathop allows the addition of an 'l' or 'f' to all math operations.
 @@ l_floor takes the floor of a float.
-@@ lua_str2number converts a decimal numeral to a number.
+@@ lua_str2number converts a decimal numeric string to a number.
 */
 
 
@@ -406,13 +437,12 @@
 	l_sprintf((s), sz, LUA_NUMBER_FMT, (LUAI_UACNUMBER)(n))
 
 /*
-@@ lua_numbertointeger converts a float number with an integral value
-** to an integer, or returns 0 if float is not within the range of
-** a lua_Integer.  (The range comparisons are tricky because of
-** rounding. The tests here assume a two-complement representation,
-** where MININTEGER always has an exact representation as a float;
-** MAXINTEGER may not have one, and therefore its conversion to float
-** may have an ill-defined value.)
+@@ lua_numbertointeger converts a float number to an integer, or
+** returns 0 if float is not within the range of a lua_Integer.
+** (The range comparisons are tricky because of rounding. The tests
+** here assume a two-complement representation, where MININTEGER always
+** has an exact representation as a float; MAXINTEGER may not have one,
+** and therefore its conversion to float may have an ill-defined value.)
 */
 #define lua_numbertointeger(n,p) \
   ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
@@ -426,7 +456,7 @@
 
 #define LUA_NUMBER	float
 
-#define l_floatatt(n)		(FLT_##n)
+#define l_mathlim(n)		(FLT_##n)
 
 #define LUAI_UACNUMBER	double
 
@@ -442,7 +472,7 @@
 
 #define LUA_NUMBER	long double
 
-#define l_floatatt(n)		(LDBL_##n)
+#define l_mathlim(n)		(LDBL_##n)
 
 #define LUAI_UACNUMBER	long double
 
@@ -457,7 +487,7 @@
 
 #define LUA_NUMBER	double
 
-#define l_floatatt(n)		(DBL_##n)
+#define l_mathlim(n)		(DBL_##n)
 
 #define LUAI_UACNUMBER	double
 
@@ -477,15 +507,16 @@
 
 
 /*
+@@ LUA_INTEGER is the integer type used by Lua.
+**
 @@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
+**
 @@ LUAI_UACINT is the result of a 'default argument promotion'
-@@ over a LUA_INTEGER.
+@@ over a lUA_INTEGER.
 @@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
 @@ LUA_INTEGER_FMT is the format for writing integers.
 @@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
 @@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
-@@ LUA_MAXUNSIGNED is the maximum value for a LUA_UNSIGNED.
-@@ LUA_UNSIGNEDBITS is the number of bits in a LUA_UNSIGNED.
 @@ lua_integer2str converts an integer to a string.
 */
 
@@ -506,9 +537,6 @@
 #define LUA_UNSIGNED		unsigned LUAI_UACINT
 
 
-#define LUA_UNSIGNEDBITS	(sizeof(LUA_UNSIGNED) * CHAR_BIT)
-
-
 /* now the variable definitions */
 
 #if LUA_INT_TYPE == LUA_INT_INT		/* { int */
@@ -519,8 +547,6 @@
 #define LUA_MAXINTEGER		INT_MAX
 #define LUA_MININTEGER		INT_MIN
 
-#define LUA_MAXUNSIGNED		UINT_MAX
-
 #elif LUA_INT_TYPE == LUA_INT_LONG	/* }{ long */
 
 #define LUA_INTEGER		long
@@ -529,8 +555,6 @@
 #define LUA_MAXINTEGER		LONG_MAX
 #define LUA_MININTEGER		LONG_MIN
 
-#define LUA_MAXUNSIGNED		ULONG_MAX
-
 #elif LUA_INT_TYPE == LUA_INT_LONGLONG	/* }{ long long */
 
 /* use presence of macro LLONG_MAX as proxy for C99 compliance */
@@ -543,8 +567,6 @@
 #define LUA_MAXINTEGER		LLONG_MAX
 #define LUA_MININTEGER		LLONG_MIN
 
-#define LUA_MAXUNSIGNED		ULLONG_MAX
-
 #elif defined(LUA_USE_WINDOWS) /* }{ */
 /* in Windows, can use specific Windows types */
 
@@ -554,8 +576,6 @@
 #define LUA_MAXINTEGER		_I64_MAX
 #define LUA_MININTEGER		_I64_MIN
 
-#define LUA_MAXUNSIGNED		_UI64_MAX
-
 #else				/* }{ */
 
 #error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
@@ -590,7 +610,7 @@
 
 
 /*
-@@ lua_strx2number converts a hexadecimal numeral to a number.
+@@ lua_strx2number converts an hexadecimal numeric string to a number.
 ** In C99, 'strtod' does that conversion. Otherwise, you can
 ** leave 'lua_strx2number' undefined and Lua will provide its own
 ** implementation.
@@ -608,7 +628,7 @@
 
 
 /*
-@@ lua_number2strx converts a float to a hexadecimal numeral.
+@@ lua_number2strx converts a float to an hexadecimal numeric string.
 ** In C99, 'sprintf' (with format specifiers '%a'/'%A') does that.
 ** Otherwise, you can leave 'lua_number2strx' undefined and Lua will
 ** provide its own implementation.
@@ -654,40 +674,12 @@
 /*
 @@ lua_getlocaledecpoint gets the locale "radix character" (decimal point).
 ** Change that if you do not want to use C locales. (Code using this
-** macro must include the header 'locale.h'.)
+** macro must include header 'locale.h'.)
 */
 #if !defined(lua_getlocaledecpoint)
 #define lua_getlocaledecpoint()		(localeconv()->decimal_point[0])
 #endif
 
-
-/*
-** macros to improve jump prediction, used mostly for error handling
-** and debug facilities. (Some macros in the Lua API use these macros.
-** Define LUA_NOBUILTIN if you do not want '__builtin_expect' in your
-** code.)
-*/
-#if !defined(luai_likely)
-
-#if defined(__GNUC__) && !defined(LUA_NOBUILTIN)
-#define luai_likely(x)		(__builtin_expect(((x) != 0), 1))
-#define luai_unlikely(x)	(__builtin_expect(((x) != 0), 0))
-#else
-#define luai_likely(x)		(x)
-#define luai_unlikely(x)	(x)
-#endif
-
-#endif
-
-
-#if defined(LUA_CORE) || defined(LUA_LIB)
-/* shorter names for Lua's own use */
-#define l_likely(x)	luai_likely(x)
-#define l_unlikely(x)	luai_unlikely(x)
-#endif
-
-
-
 /* }================================================================== */
 
 
@@ -723,7 +715,7 @@
 ** {==================================================================
 ** Macros that affect the API and must be stable (that is, must be the
 ** same when you compile Lua and when you compile code that links to
-** Lua).
+** Lua). You probably do not want/need to change them.
 ** =====================================================================
 */
 
@@ -732,9 +724,8 @@
 ** CHANGE it if you need a different limit. This limit is arbitrary;
 ** its only purpose is to stop Lua from consuming unlimited stack
 ** space (and to reserve some numbers for pseudo-indices).
-** (It must fit into max(size_t)/32.)
 */
-#if LUAI_IS32INT
+#if LUAI_BITSINT >= 32
 #define LUAI_MAXSTACK		1000000
 #else
 #define LUAI_MAXSTACK		15000
@@ -759,19 +750,28 @@
 
 /*
 @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
+** CHANGE it if it uses too much C-stack space. (For long double,
+** 'string.format("%.99f", -1e4932)' needs 5034 bytes, so a
+** smaller buffer would force a memory allocation for each call to
+** 'string.format'.)
 */
-#define LUAL_BUFFERSIZE   ((int)(16 * sizeof(void*) * sizeof(lua_Number)))
-
-
-/*
-@@ LUAI_MAXALIGN defines fields that, when used in a union, ensure
-** maximum alignment for the other items in that union.
-*/
-#define LUAI_MAXALIGN  lua_Number n; double u; void *s; lua_Integer i; long l
+#if LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE
+#define LUAL_BUFFERSIZE		8192
+#else
+#define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
+#endif
 
 /* }================================================================== */
 
 
+/*
+@@ LUA_QL describes how error messages quote program elements.
+** Lua does not use these macros anymore; they are here for
+** compatibility only.
+*/
+#define LUA_QL(x)	"'" x "'"
+#define LUA_QS		LUA_QL("%s")
+
 
 
 

lualib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h $
+** $Id: lualib.h,v 1.45.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -35,6 +35,9 @@ LUAMOD_API int (luaopen_string) (lua_State *L);
 #define LUA_UTF8LIBNAME	"utf8"
 LUAMOD_API int (luaopen_utf8) (lua_State *L);
 
+#define LUA_BITLIBNAME	"bit32"
+LUAMOD_API int (luaopen_bit32) (lua_State *L);
+
 #define LUA_MATHLIBNAME	"math"
 LUAMOD_API int (luaopen_math) (lua_State *L);
 
@@ -49,4 +52,10 @@ LUAMOD_API int (luaopen_package) (lua_State *L);
 LUALIB_API void (luaL_openlibs) (lua_State *L);
 
 
+
+#if !defined(lua_assert)
+#define lua_assert(x)	((void)0)
+#endif
+
+
 #endif

lundump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c $
+** $Id: lundump.c,v 2.44.1.1 2017/04/19 17:20:42 roberto Exp $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -10,7 +10,6 @@
 #include "lprefix.h"
 
 
-#include <limits.h>
 #include <string.h>
 
 #include "lua.h"
@@ -26,7 +25,7 @@
 
 
 #if !defined(luai_verifycode)
-#define luai_verifycode(L,f)  /* empty */
+#define luai_verifycode(L,b,f)  /* empty */
 #endif
 
 
@@ -37,92 +36,73 @@ typedef struct {
 } LoadState;
 
 
-static l_noret error (LoadState *S, const char *why) {
-  luaO_pushfstring(S->L, "%s: bad binary format (%s)", S->name, why);
+static l_noret error(LoadState *S, const char *why) {
+  luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why);
   luaD_throw(S->L, LUA_ERRSYNTAX);
 }
 
 
 /*
-** All high-level loads go through loadVector; you can change it to
+** All high-level loads go through LoadVector; you can change it to
 ** adapt to the endianness of the input
 */
-#define loadVector(S,b,n)	loadBlock(S,b,(n)*sizeof((b)[0]))
+#define LoadVector(S,b,n)	LoadBlock(S,b,(n)*sizeof((b)[0]))
 
-static void loadBlock (LoadState *S, void *b, size_t size) {
+static void LoadBlock (LoadState *S, void *b, size_t size) {
   if (luaZ_read(S->Z, b, size) != 0)
-    error(S, "truncated chunk");
+    error(S, "truncated");
 }
 
 
-#define loadVar(S,x)		loadVector(S,&x,1)
+#define LoadVar(S,x)		LoadVector(S,&x,1)
 
 
-static lu_byte loadByte (LoadState *S) {
-  int b = zgetc(S->Z);
-  if (b == EOZ)
-    error(S, "truncated chunk");
-  return cast_byte(b);
-}
-
-
-static size_t loadUnsigned (LoadState *S, size_t limit) {
-  size_t x = 0;
-  int b;
-  limit >>= 7;
-  do {
-    b = loadByte(S);
-    if (x >= limit)
-      error(S, "integer overflow");
-    x = (x << 7) | (b & 0x7f);
-  } while ((b & 0x80) == 0);
+static lu_byte LoadByte (LoadState *S) {
+  lu_byte x;
+  LoadVar(S, x);
   return x;
 }
 
 
-static size_t loadSize (LoadState *S) {
-  return loadUnsigned(S, ~(size_t)0);
+static int LoadInt (LoadState *S) {
+  int x;
+  LoadVar(S, x);
+  return x;
 }
 
 
-static int loadInt (LoadState *S) {
-  return cast_int(loadUnsigned(S, INT_MAX));
-}
-
-
-static lua_Number loadNumber (LoadState *S) {
+static lua_Number LoadNumber (LoadState *S) {
   lua_Number x;
-  loadVar(S, x);
+  LoadVar(S, x);
   return x;
 }
 
 
-static lua_Integer loadInteger (LoadState *S) {
+static lua_Integer LoadInteger (LoadState *S) {
   lua_Integer x;
-  loadVar(S, x);
+  LoadVar(S, x);
   return x;
 }
 
 
-/*
-** Load a nullable string into prototype 'p'.
-*/
-static TString *loadStringN (LoadState *S, Proto *p) {
+static TString *LoadString (LoadState *S, Proto *p) {
   lua_State *L = S->L;
+  size_t size = LoadByte(S);
   TString *ts;
-  size_t size = loadSize(S);
-  if (size == 0)  /* no string? */
+  if (size == 0xFF)
+    LoadVar(S, size);
+  if (size == 0)
     return NULL;
   else if (--size <= LUAI_MAXSHORTLEN) {  /* short string? */
     char buff[LUAI_MAXSHORTLEN];
-    loadVector(S, buff, size);  /* load string into buffer */
-    ts = luaS_newlstr(L, buff, size);  /* create string */
+    LoadVector(S, buff, size);
+    ts = luaS_newlstr(L, buff, size);
   }
   else {  /* long string */
-    ts = luaS_createlngstrobj(L, size);  /* create string */
+    ts = luaS_createlngstrobj(L, size);
     setsvalue2s(L, L->top, ts);  /* anchor it ('loadVector' can GC) */
     luaD_inctop(L);
-    loadVector(S, getstr(ts), size);  /* load directly in final place */
+    LoadVector(S, getstr(ts), size);  /* load directly in final place */
     L->top--;  /* pop string */
   }
   luaC_objbarrier(L, p, ts);
@@ -130,183 +110,157 @@ static TString *loadStringN (LoadState *S, Proto *p) {
 }
 
 
-/*
-** Load a non-nullable string into prototype 'p'.
-*/
-static TString *loadString (LoadState *S, Proto *p) {
-  TString *st = loadStringN(S, p);
-  if (st == NULL)
-    error(S, "bad format for constant string");
-  return st;
-}
-
-
-static void loadCode (LoadState *S, Proto *f) {
-  int n = loadInt(S);
-  f->code = luaM_newvectorchecked(S->L, n, Instruction);
+static void LoadCode (LoadState *S, Proto *f) {
+  int n = LoadInt(S);
+  f->code = luaM_newvector(S->L, n, Instruction);
   f->sizecode = n;
-  loadVector(S, f->code, n);
+  LoadVector(S, f->code, n);
 }
 
 
-static void loadFunction(LoadState *S, Proto *f, TString *psource);
+static void LoadFunction(LoadState *S, Proto *f, TString *psource);
 
 
-static void loadConstants (LoadState *S, Proto *f) {
+static void LoadConstants (LoadState *S, Proto *f) {
   int i;
-  int n = loadInt(S);
-  f->k = luaM_newvectorchecked(S->L, n, TValue);
+  int n = LoadInt(S);
+  f->k = luaM_newvector(S->L, n, TValue);
   f->sizek = n;
   for (i = 0; i < n; i++)
     setnilvalue(&f->k[i]);
   for (i = 0; i < n; i++) {
     TValue *o = &f->k[i];
-    int t = loadByte(S);
+    int t = LoadByte(S);
     switch (t) {
-      case LUA_VNIL:
-        setnilvalue(o);
-        break;
-      case LUA_VFALSE:
-        setbfvalue(o);
-        break;
-      case LUA_VTRUE:
-        setbtvalue(o);
-        break;
-      case LUA_VNUMFLT:
-        setfltvalue(o, loadNumber(S));
-        break;
-      case LUA_VNUMINT:
-        setivalue(o, loadInteger(S));
-        break;
-      case LUA_VSHRSTR:
-      case LUA_VLNGSTR:
-        setsvalue2n(S->L, o, loadString(S, f));
-        break;
-      default: lua_assert(0);
+    case LUA_TNIL:
+      setnilvalue(o);
+      break;
+    case LUA_TBOOLEAN:
+      setbvalue(o, LoadByte(S));
+      break;
+    case LUA_TNUMFLT:
+      setfltvalue(o, LoadNumber(S));
+      break;
+    case LUA_TNUMINT:
+      setivalue(o, LoadInteger(S));
+      break;
+    case LUA_TSHRSTR:
+    case LUA_TLNGSTR:
+      setsvalue2n(S->L, o, LoadString(S, f));
+      break;
+    default:
+      lua_assert(0);
     }
   }
 }
 
 
-static void loadProtos (LoadState *S, Proto *f) {
+static void LoadProtos (LoadState *S, Proto *f) {
   int i;
-  int n = loadInt(S);
-  f->p = luaM_newvectorchecked(S->L, n, Proto *);
+  int n = LoadInt(S);
+  f->p = luaM_newvector(S->L, n, Proto *);
   f->sizep = n;
   for (i = 0; i < n; i++)
     f->p[i] = NULL;
   for (i = 0; i < n; i++) {
     f->p[i] = luaF_newproto(S->L);
     luaC_objbarrier(S->L, f, f->p[i]);
-    loadFunction(S, f->p[i], f->source);
+    LoadFunction(S, f->p[i], f->source);
   }
 }
 
 
-/*
-** Load the upvalues for a function. The names must be filled first,
-** because the filling of the other fields can raise read errors and
-** the creation of the error message can call an emergency collection;
-** in that case all prototypes must be consistent for the GC.
-*/
-static void loadUpvalues (LoadState *S, Proto *f) {
+static void LoadUpvalues (LoadState *S, Proto *f) {
   int i, n;
-  n = loadInt(S);
-  f->upvalues = luaM_newvectorchecked(S->L, n, Upvaldesc);
+  n = LoadInt(S);
+  f->upvalues = luaM_newvector(S->L, n, Upvaldesc);
   f->sizeupvalues = n;
-  for (i = 0; i < n; i++)  /* make array valid for GC */
+  for (i = 0; i < n; i++)
     f->upvalues[i].name = NULL;
-  for (i = 0; i < n; i++) {  /* following calls can raise errors */
-    f->upvalues[i].instack = loadByte(S);
-    f->upvalues[i].idx = loadByte(S);
-    f->upvalues[i].kind = loadByte(S);
+  for (i = 0; i < n; i++) {
+    f->upvalues[i].instack = LoadByte(S);
+    f->upvalues[i].idx = LoadByte(S);
   }
 }
 
 
-static void loadDebug (LoadState *S, Proto *f) {
+static void LoadDebug (LoadState *S, Proto *f) {
   int i, n;
-  n = loadInt(S);
-  f->lineinfo = luaM_newvectorchecked(S->L, n, ls_byte);
+  n = LoadInt(S);
+  f->lineinfo = luaM_newvector(S->L, n, int);
   f->sizelineinfo = n;
-  loadVector(S, f->lineinfo, n);
-  n = loadInt(S);
-  f->abslineinfo = luaM_newvectorchecked(S->L, n, AbsLineInfo);
-  f->sizeabslineinfo = n;
-  for (i = 0; i < n; i++) {
-    f->abslineinfo[i].pc = loadInt(S);
-    f->abslineinfo[i].line = loadInt(S);
-  }
-  n = loadInt(S);
-  f->locvars = luaM_newvectorchecked(S->L, n, LocVar);
+  LoadVector(S, f->lineinfo, n);
+  n = LoadInt(S);
+  f->locvars = luaM_newvector(S->L, n, LocVar);
   f->sizelocvars = n;
   for (i = 0; i < n; i++)
     f->locvars[i].varname = NULL;
   for (i = 0; i < n; i++) {
-    f->locvars[i].varname = loadStringN(S, f);
-    f->locvars[i].startpc = loadInt(S);
-    f->locvars[i].endpc = loadInt(S);
+    f->locvars[i].varname = LoadString(S, f);
+    f->locvars[i].startpc = LoadInt(S);
+    f->locvars[i].endpc = LoadInt(S);
   }
-  n = loadInt(S);
+  n = LoadInt(S);
   for (i = 0; i < n; i++)
-    f->upvalues[i].name = loadStringN(S, f);
+    f->upvalues[i].name = LoadString(S, f);
 }
 
 
-static void loadFunction (LoadState *S, Proto *f, TString *psource) {
-  f->source = loadStringN(S, f);
+static void LoadFunction (LoadState *S, Proto *f, TString *psource) {
+  f->source = LoadString(S, f);
   if (f->source == NULL)  /* no source in dump? */
     f->source = psource;  /* reuse parent's source */
-  f->linedefined = loadInt(S);
-  f->lastlinedefined = loadInt(S);
-  f->numparams = loadByte(S);
-  f->is_vararg = loadByte(S);
-  f->maxstacksize = loadByte(S);
-  loadCode(S, f);
-  loadConstants(S, f);
-  loadUpvalues(S, f);
-  loadProtos(S, f);
-  loadDebug(S, f);
+  f->linedefined = LoadInt(S);
+  f->lastlinedefined = LoadInt(S);
+  f->numparams = LoadByte(S);
+  f->is_vararg = LoadByte(S);
+  f->maxstacksize = LoadByte(S);
+  LoadCode(S, f);
+  LoadConstants(S, f);
+  LoadUpvalues(S, f);
+  LoadProtos(S, f);
+  LoadDebug(S, f);
 }
 
 
 static void checkliteral (LoadState *S, const char *s, const char *msg) {
   char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
   size_t len = strlen(s);
-  loadVector(S, buff, len);
+  LoadVector(S, buff, len);
   if (memcmp(s, buff, len) != 0)
     error(S, msg);
 }
 
 
 static void fchecksize (LoadState *S, size_t size, const char *tname) {
-  if (loadByte(S) != size)
-    error(S, luaO_pushfstring(S->L, "%s size mismatch", tname));
+  if (LoadByte(S) != size)
+    error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));
 }
 
 
 #define checksize(S,t)	fchecksize(S,sizeof(t),#t)
 
 static void checkHeader (LoadState *S) {
-  /* skip 1st char (already read and checked) */
-  checkliteral(S, &LUA_SIGNATURE[1], "not a binary chunk");
-  if (loadByte(S) != LUAC_VERSION)
-    error(S, "version mismatch");
-  if (loadByte(S) != LUAC_FORMAT)
-    error(S, "format mismatch");
-  checkliteral(S, LUAC_DATA, "corrupted chunk");
+  checkliteral(S, LUA_SIGNATURE + 1, "not a");  /* 1st char already checked */
+  if (LoadByte(S) != LUAC_VERSION)
+    error(S, "version mismatch in");
+  if (LoadByte(S) != LUAC_FORMAT)
+    error(S, "format mismatch in");
+  checkliteral(S, LUAC_DATA, "corrupted");
+  checksize(S, int);
+  checksize(S, size_t);
   checksize(S, Instruction);
   checksize(S, lua_Integer);
   checksize(S, lua_Number);
-  if (loadInteger(S) != LUAC_INT)
-    error(S, "integer format mismatch");
-  if (loadNumber(S) != LUAC_NUM)
-    error(S, "float format mismatch");
+  if (LoadInteger(S) != LUAC_INT)
+    error(S, "endianness mismatch in");
+  if (LoadNumber(S) != LUAC_NUM)
+    error(S, "float format mismatch in");
 }
 
 
 /*
-** Load precompiled chunk.
+** load precompiled chunk
 */
 LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
   LoadState S;
@@ -320,14 +274,14 @@ LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
   S.L = L;
   S.Z = Z;
   checkHeader(&S);
-  cl = luaF_newLclosure(L, loadByte(&S));
-  setclLvalue2s(L, L->top, cl);
+  cl = luaF_newLclosure(L, LoadByte(&S));
+  setclLvalue(L, L->top, cl);
   luaD_inctop(L);
   cl->p = luaF_newproto(L);
   luaC_objbarrier(L, cl, cl->p);
-  loadFunction(&S, cl->p, NULL);
+  LoadFunction(&S, cl->p, NULL);
   lua_assert(cl->nupvalues == cl->p->sizeupvalues);
-  luai_verifycode(L, cl->p);
+  luai_verifycode(L, buff, cl->p);
   return cl;
 }
 

lundump.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h $
+** $Id: lundump.h,v 1.45.1.1 2017/04/19 17:20:42 roberto Exp $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -18,12 +18,8 @@
 #define LUAC_INT	0x5678
 #define LUAC_NUM	cast_num(370.5)
 
-/*
-** Encode major-minor version in one byte, one nibble for each
-*/
-#define MYINT(s)	(s[0]-'0')  /* assume one-digit numerals */
+#define MYINT(s)	(s[0]-'0')
 #define LUAC_VERSION	(MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR))
-
 #define LUAC_FORMAT	0	/* this is the official format */
 
 /* load one chunk; from lundump.c */

lutf8lib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lutf8lib.c $
+** $Id: lutf8lib.c,v 1.16.1.1 2017/04/19 17:29:57 roberto Exp $
 ** Standard library for UTF-8 manipulation
 ** See Copyright Notice in lua.h
 */
@@ -20,20 +20,7 @@
 #include "lauxlib.h"
 #include "lualib.h"
 
-
-#define MAXUNICODE	0x10FFFFu
-
-#define MAXUTF		0x7FFFFFFFu
-
-/*
-** Integer type for decoded UTF-8 values; MAXUTF needs 31 bits.
-*/
-#if (UINT_MAX >> 30) >= 1
-typedef unsigned int utfint;
-#else
-typedef unsigned long utfint;
-#endif
-
+#define MAXUNICODE	0x10FFFF
 
 #define iscont(p)	((*(p) & 0xC0) == 0x80)
 
@@ -48,62 +35,53 @@ static lua_Integer u_posrelat (lua_Integer pos, size_t len) {
 
 
 /*
-** Decode one UTF-8 sequence, returning NULL if byte sequence is
-** invalid.  The array 'limits' stores the minimum value for each
-** sequence length, to check for overlong representations. Its first
-** entry forces an error for non-ascii bytes with no continuation
-** bytes (count == 0).
+** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
 */
-static const char *utf8_decode (const char *s, utfint *val, int strict) {
-  static const utfint limits[] =
-        {~(utfint)0, 0x80, 0x800, 0x10000u, 0x200000u, 0x4000000u};
-  unsigned int c = (unsigned char)s[0];
-  utfint res = 0;  /* final result */
+static const char *utf8_decode (const char *o, int *val) {
+  static const unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
+  const unsigned char *s = (const unsigned char *)o;
+  unsigned int c = s[0];
+  unsigned int res = 0;  /* final result */
   if (c < 0x80)  /* ascii? */
     res = c;
   else {
     int count = 0;  /* to count number of continuation bytes */
-    for (; c & 0x40; c <<= 1) {  /* while it needs continuation bytes... */
-      unsigned int cc = (unsigned char)s[++count];  /* read next byte */
+    while (c & 0x40) {  /* still have continuation bytes? */
+      int cc = s[++count];  /* read next byte */
       if ((cc & 0xC0) != 0x80)  /* not a continuation byte? */
         return NULL;  /* invalid byte sequence */
       res = (res << 6) | (cc & 0x3F);  /* add lower 6 bits from cont. byte */
+      c <<= 1;  /* to test next bit */
     }
-    res |= ((utfint)(c & 0x7F) << (count * 5));  /* add first byte */
-    if (count > 5 || res > MAXUTF || res < limits[count])
+    res |= ((c & 0x7F) << (count * 5));  /* add first byte */
+    if (count > 3 || res > MAXUNICODE || res <= limits[count])
       return NULL;  /* invalid byte sequence */
     s += count;  /* skip continuation bytes read */
   }
-  if (strict) {
-    /* check for invalid code points; too large or surrogates */
-    if (res > MAXUNICODE || (0xD800u <= res && res <= 0xDFFFu))
-      return NULL;
-  }
   if (val) *val = res;
-  return s + 1;  /* +1 to include first byte */
+  return (const char *)s + 1;  /* +1 to include first byte */
 }
 
 
 /*
-** utf8len(s [, i [, j [, lax]]]) --> number of characters that
-** start in the range [i,j], or nil + current position if 's' is not
-** well formed in that interval
+** utf8len(s [, i [, j]]) --> number of characters that start in the
+** range [i,j], or nil + current position if 's' is not well formed in
+** that interval
 */
 static int utflen (lua_State *L) {
-  lua_Integer n = 0;  /* counter for the number of characters */
-  size_t len;  /* string length in bytes */
+  int n = 0;
+  size_t len;
   const char *s = luaL_checklstring(L, 1, &len);
   lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
   lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len);
-  int lax = lua_toboolean(L, 4);
   luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
-                   "initial position out of bounds");
+                   "initial position out of string");
   luaL_argcheck(L, --posj < (lua_Integer)len, 3,
-                   "final position out of bounds");
+                   "final position out of string");
   while (posi <= posj) {
-    const char *s1 = utf8_decode(s + posi, NULL, !lax);
+    const char *s1 = utf8_decode(s + posi, NULL);
     if (s1 == NULL) {  /* conversion error? */
-      luaL_pushfail(L);  /* return fail ... */
+      lua_pushnil(L);  /* return nil ... */
       lua_pushinteger(L, posi + 1);  /* ... and current position */
       return 2;
     }
@@ -116,29 +94,28 @@ static int utflen (lua_State *L) {
 
 
 /*
-** codepoint(s, [i, [j [, lax]]]) -> returns codepoints for all
-** characters that start in the range [i,j]
+** codepoint(s, [i, [j]])  -> returns codepoints for all characters
+** that start in the range [i,j]
 */
 static int codepoint (lua_State *L) {
   size_t len;
   const char *s = luaL_checklstring(L, 1, &len);
   lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
   lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len);
-  int lax = lua_toboolean(L, 4);
   int n;
   const char *se;
-  luaL_argcheck(L, posi >= 1, 2, "out of bounds");
-  luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of bounds");
+  luaL_argcheck(L, posi >= 1, 2, "out of range");
+  luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of range");
   if (posi > pose) return 0;  /* empty interval; return no values */
   if (pose - posi >= INT_MAX)  /* (lua_Integer -> int) overflow? */
     return luaL_error(L, "string slice too long");
-  n = (int)(pose -  posi) + 1;  /* upper bound for number of returns */
+  n = (int)(pose -  posi) + 1;
   luaL_checkstack(L, n, "string slice too long");
-  n = 0;  /* count the number of returns */
-  se = s + pose;  /* string end */
+  n = 0;
+  se = s + pose;
   for (s += posi - 1; s < se;) {
-    utfint code;
-    s = utf8_decode(s, &code, !lax);
+    int code;
+    s = utf8_decode(s, &code);
     if (s == NULL)
       return luaL_error(L, "invalid UTF-8 code");
     lua_pushinteger(L, code);
@@ -149,8 +126,8 @@ static int codepoint (lua_State *L) {
 
 
 static void pushutfchar (lua_State *L, int arg) {
-  lua_Unsigned code = (lua_Unsigned)luaL_checkinteger(L, arg);
-  luaL_argcheck(L, code <= MAXUTF, arg, "value out of range");
+  lua_Integer code = luaL_checkinteger(L, arg);
+  luaL_argcheck(L, 0 <= code && code <= MAXUNICODE, arg, "value out of range");
   lua_pushfstring(L, "%U", (long)code);
 }
 
@@ -187,7 +164,7 @@ static int byteoffset (lua_State *L) {
   lua_Integer posi = (n >= 0) ? 1 : len + 1;
   posi = u_posrelat(luaL_optinteger(L, 3, posi), len);
   luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3,
-                   "position out of bounds");
+                   "position out of range");
   if (n == 0) {
     /* find beginning of current byte sequence */
     while (posi > 0 && iscont(s + posi)) posi--;
@@ -216,12 +193,12 @@ static int byteoffset (lua_State *L) {
   if (n == 0)  /* did it find given character? */
     lua_pushinteger(L, posi + 1);
   else  /* no such character */
-    luaL_pushfail(L);
+    lua_pushnil(L);
   return 1;
 }
 
 
-static int iter_aux (lua_State *L, int strict) {
+static int iter_aux (lua_State *L) {
   size_t len;
   const char *s = luaL_checklstring(L, 1, &len);
   lua_Integer n = lua_tointeger(L, 2) - 1;
@@ -234,9 +211,9 @@ static int iter_aux (lua_State *L, int strict) {
   if (n >= (lua_Integer)len)
     return 0;  /* no more codepoints */
   else {
-    utfint code;
-    const char *next = utf8_decode(s + n, &code, strict);
-    if (next == NULL)
+    int code;
+    const char *next = utf8_decode(s + n, &code);
+    if (next == NULL || iscont(next))
       return luaL_error(L, "invalid UTF-8 code");
     lua_pushinteger(L, n + 1);
     lua_pushinteger(L, code);
@@ -245,19 +222,9 @@ static int iter_aux (lua_State *L, int strict) {
 }
 
 
-static int iter_auxstrict (lua_State *L) {
-  return iter_aux(L, 1);
-}
-
-static int iter_auxlax (lua_State *L) {
-  return iter_aux(L, 0);
-}
-
-
 static int iter_codes (lua_State *L) {
-  int lax = lua_toboolean(L, 2);
   luaL_checkstring(L, 1);
-  lua_pushcfunction(L, lax ? iter_auxlax : iter_auxstrict);
+  lua_pushcfunction(L, iter_aux);
   lua_pushvalue(L, 1);
   lua_pushinteger(L, 0);
   return 3;
@@ -265,7 +232,7 @@ static int iter_codes (lua_State *L) {
 
 
 /* pattern to match a single UTF-8 character */
-#define UTF8PATT	"[\0-\x7F\xC2-\xFD][\x80-\xBF]*"
+#define UTF8PATT	"[\0-\x7F\xC2-\xF4][\x80-\xBF]*"
 
 
 static const luaL_Reg funcs[] = {

lvm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h $
+** $Id: lvm.h,v 2.41.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -33,42 +33,15 @@
 ** integral values)
 */
 #if !defined(LUA_FLOORN2I)
-#define LUA_FLOORN2I		F2Ieq
+#define LUA_FLOORN2I		0
 #endif
 
 
-/*
-** Rounding modes for float->integer coercion
- */
-typedef enum {
-  F2Ieq,     /* no rounding; accepts only integral values */
-  F2Ifloor,  /* takes the floor of the number */
-  F2Iceil    /* takes the ceil of the number */
-} F2Imod;
-
-
-/* convert an object to a float (including string coercion) */
 #define tonumber(o,n) \
 	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
 
-
-/* convert an object to a float (without string coercion) */
-#define tonumberns(o,n) \
-	(ttisfloat(o) ? ((n) = fltvalue(o), 1) : \
-	(ttisinteger(o) ? ((n) = cast_num(ivalue(o)), 1) : 0))
-
-
-/* convert an object to an integer (including string coercion) */
 #define tointeger(o,i) \
-  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
-                          : luaV_tointeger(o,i,LUA_FLOORN2I))
-
-
-/* convert an object to an integer (without string coercion) */
-#define tointegerns(o,i) \
-  (l_likely(ttisinteger(o)) ? (*(i) = ivalue(o), 1) \
-                          : luaV_tointegerns(o,i,LUA_FLOORN2I))
-
+    (ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger(o,i,LUA_FLOORN2I))
 
 #define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
 
@@ -76,39 +49,47 @@ typedef enum {
 
 
 /*
-** fast track for 'gettable': if 't' is a table and 't[k]' is present,
-** return 1 with 'slot' pointing to 't[k]' (position of final result).
-** Otherwise, return 0 (meaning it will have to check metamethod)
-** with 'slot' pointing to an empty 't[k]' (if 't' is a table) or NULL
-** (otherwise). 'f' is the raw get function to use.
+** fast track for 'gettable': if 't' is a table and 't[k]' is not nil,
+** return 1 with 'slot' pointing to 't[k]' (final result).  Otherwise,
+** return 0 (meaning it will have to check metamethod) with 'slot'
+** pointing to a nil 't[k]' (if 't' is a table) or NULL (otherwise).
+** 'f' is the raw get function to use.
 */
 #define luaV_fastget(L,t,k,slot,f) \
   (!ttistable(t)  \
    ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
    : (slot = f(hvalue(t), k),  /* else, do raw access */  \
-      !isempty(slot)))  /* result not empty? */
+      !ttisnil(slot)))  /* result not nil? */
+
+/*
+** standard implementation for 'gettable'
+*/
+#define luaV_gettable(L,t,k,v) { const TValue *slot; \
+  if (luaV_fastget(L,t,k,slot,luaH_get)) { setobj2s(L, v, slot); } \
+  else luaV_finishget(L,t,k,v,slot); }
 
 
 /*
-** Special case of 'luaV_fastget' for integers, inlining the fast case
-** of 'luaH_getint'.
+** Fast track for set table. If 't' is a table and 't[k]' is not nil,
+** call GC barrier, do a raw 't[k]=v', and return true; otherwise,
+** return false with 'slot' equal to NULL (if 't' is not a table) or
+** 'nil'. (This is needed by 'luaV_finishget'.) Note that, if the macro
+** returns true, there is no need to 'invalidateTMcache', because the
+** call is not creating a new entry.
 */
-#define luaV_fastgeti(L,t,k,slot) \
-  (!ttistable(t)  \
-   ? (slot = NULL, 0)  /* not a table; 'slot' is NULL and result is 0 */  \
-   : (slot = (l_castS2U(k) - 1u < hvalue(t)->alimit) \
-              ? &hvalue(t)->array[k - 1] : luaH_getint(hvalue(t), k), \
-      !isempty(slot)))  /* result not empty? */
+#define luaV_fastset(L,t,k,slot,f,v) \
+  (!ttistable(t) \
+   ? (slot = NULL, 0) \
+   : (slot = f(hvalue(t), k), \
+     ttisnil(slot) ? 0 \
+     : (luaC_barrierback(L, hvalue(t), v), \
+        setobj2t(L, cast(TValue *,slot), v), \
+        1)))
 
 
-/*
-** Finish a fast set operation (when fast get succeeds). In that case,
-** 'slot' points to the place to put the value.
-*/
-#define luaV_finishfastset(L,t,slot,v) \
-    { setobj2t(L, cast(TValue *,slot), v); \
-      luaC_barrierback(L, gcvalue(t), v); }
-
+#define luaV_settable(L,t,k,v) { const TValue *slot; \
+  if (!luaV_fastset(L,t,k,slot,luaH_get,v)) \
+    luaV_finishset(L,t,k,v,slot); }
 
 
 
@@ -116,20 +97,16 @@ LUAI_FUNC int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2);
 LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
 LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
 LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
-LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, F2Imod mode);
-LUAI_FUNC int luaV_tointegerns (const TValue *obj, lua_Integer *p,
-                                F2Imod mode);
-LUAI_FUNC int luaV_flttointeger (lua_Number n, lua_Integer *p, F2Imod mode);
+LUAI_FUNC int luaV_tointeger (const TValue *obj, lua_Integer *p, int mode);
 LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
                                StkId val, const TValue *slot);
 LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
-                               TValue *val, const TValue *slot);
+                               StkId val, const TValue *slot);
 LUAI_FUNC void luaV_finishOp (lua_State *L);
-LUAI_FUNC void luaV_execute (lua_State *L, CallInfo *ci);
+LUAI_FUNC void luaV_execute (lua_State *L);
 LUAI_FUNC void luaV_concat (lua_State *L, int total);
-LUAI_FUNC lua_Integer luaV_idiv (lua_State *L, lua_Integer x, lua_Integer y);
+LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
 LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
-LUAI_FUNC lua_Number luaV_modf (lua_State *L, lua_Number x, lua_Number y);
 LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
 

lzio.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.c $
+** $Id: lzio.c,v 1.37.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h $
+** $Id: lzio.h,v 1.31.1.1 2017/04/19 17:20:42 roberto Exp $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */

makefile

@@ -1,11 +1,12 @@
-# Developer's makefile for building Lua
-# see luaconf.h for further customization
+# makefile for building Lua
+# see INSTALL for installation instructions
+# see ../Makefile and luaconf.h for further customization
 
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
 # Warnings valid for both C and C++
 CWARNSCPP= \
-	-Wfatal-errors \
+	-pedantic \
 	-Wextra \
 	-Wshadow \
 	-Wsign-compare \
@@ -13,24 +14,18 @@ CWARNSCPP= \
 	-Wwrite-strings \
 	-Wredundant-decls \
 	-Wdisabled-optimization \
+	-Waggregate-return \
 	-Wdouble-promotion \
-        # the next warnings might be useful sometimes,
-	# but usually they generate too much noise
-	# -Werror \
-	# -pedantic   # warns if we use jump tables \
-	# -Wconversion  \
+	#-Wno-aggressive-loop-optimizations   # not accepted by clang \
+	#-Wlogical-op   # not accepted by clang \
+	# the next warnings generate too much noise, so they are disabled
+	# -Wconversion  -Wno-sign-conversion \
 	# -Wsign-conversion \
+	# -Wconversion \
 	# -Wstrict-overflow=2 \
 	# -Wformat=2 \
 	# -Wcast-qual \
 
-
-# Warnings for gcc, not valid for clang
-CWARNGCC= \
-	-Wlogical-op \
-	-Wno-aggressive-loop-optimizations \
-
-
 # The next warnings are neither valid nor needed for C++
 CWARNSC= -Wdeclaration-after-statement \
 	-Wmissing-prototypes \
@@ -40,38 +35,31 @@ CWARNSC= -Wdeclaration-after-statement \
 	-Wold-style-definition \
 
 
-CWARNS= $(CWARNSCPP) $(CWARNSC) $(CWARNGCC)
+CWARNS= $(CWARNSCPP)  $(CWARNSC)
 
-# Some useful compiler options for internal tests:
-# -DLUAI_ASSERT turns on all assertions inside Lua.
-# -DHARDSTACKTESTS forces a reallocation of the stack at every point where
-# the stack can be reallocated.
-# -DHARDMEMTESTS forces a full collection at all points where the collector
-# can run.
-# -DEMERGENCYGCTESTS forces an emergency collection at every single allocation.
-# -DEXTERNMEMCHECK removes internal consistency checking of blocks being
-# deallocated (useful when an external tool like valgrind does the check).
-# -DMAXINDEXRK=k limits range of constants in RK instruction operands.
-# -DLUA_COMPAT_5_3
 
+# -DEXTERNMEMCHECK -DHARDSTACKTESTS -DHARDMEMTESTS -DTRACEMEM='"tempmem"'
+# -g -DLUA_USER_H='"ltests.h"'
 # -pg -malign-double
 # -DLUA_USE_CTYPE -DLUA_USE_APICHECK
-# ('-ftrapv' for runtime checks of integer overflows)
-# -fsanitize=undefined -ftrapv -fno-inline
-# TESTS= -DLUA_USER_H='"ltests.h"' -O0 -g
+# (in clang, '-ftrapv' for runtime checks of integer overflows)
+# -fsanitize=undefined -ftrapv
+TESTS= -DLUA_USER_H='"ltests.h"'
 
+# -mtune=native -fomit-frame-pointer
+# -fno-stack-protector
+LOCAL = $(TESTS) $(CWARNS) -g
 
-LOCAL = $(TESTS) $(CWARNS)
 
 
 # enable Linux goodies
-MYCFLAGS= $(LOCAL) -std=c99 -DLUA_USE_LINUX -DLUA_USE_READLINE
+MYCFLAGS= $(LOCAL) -std=c99 -DLUA_USE_LINUX -DLUA_COMPAT_5_2
 MYLDFLAGS= $(LOCAL) -Wl,-E
 MYLIBS= -ldl -lreadline
 
 
 CC= gcc
-CFLAGS= -Wall -O2 $(MYCFLAGS) -fno-stack-protector -fno-common -march=native
+CFLAGS= -Wall -O2 $(MYCFLAGS)
 AR= ar rc
 RANLIB= ranlib
 RM= rm -f
@@ -89,18 +77,19 @@ CORE_O=	lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o \
 	ltm.o lundump.o lvm.o lzio.o ltests.o
 AUX_O=	lauxlib.o
 LIB_O=	lbaselib.o ldblib.o liolib.o lmathlib.o loslib.o ltablib.o lstrlib.o \
-	lutf8lib.o loadlib.o lcorolib.o linit.o
+	lutf8lib.o lbitlib.o loadlib.o lcorolib.o linit.o
 
 LUA_T=	lua
 LUA_O=	lua.o
 
+# LUAC_T=	luac
+# LUAC_O=	luac.o print.o
 
-ALL_T= $(CORE_T) $(LUA_T)
-ALL_O= $(CORE_O) $(LUA_O) $(AUX_O) $(LIB_O)
+ALL_T= $(CORE_T) $(LUA_T) $(LUAC_T)
+ALL_O= $(CORE_O) $(LUA_O) $(LUAC_O) $(AUX_O) $(LIB_O)
 ALL_A= $(CORE_T)
 
 all:	$(ALL_T)
-	touch all
 
 o:	$(ALL_O)
 
@@ -113,8 +102,11 @@ $(CORE_T): $(CORE_O) $(AUX_O) $(LIB_O)
 $(LUA_T): $(LUA_O) $(CORE_T)
 	$(CC) -o $@ $(MYLDFLAGS) $(LUA_O) $(CORE_T) $(LIBS) $(MYLIBS) $(DL)
 
+$(LUAC_T): $(LUAC_O) $(CORE_T)
+	$(CC) -o $@ $(MYLDFLAGS) $(LUAC_O) $(CORE_T) $(LIBS) $(MYLIBS)
 
 clean:
+	rcsclean -u
 	$(RM) $(ALL_T) $(ALL_O)
 
 depend:
@@ -131,7 +123,7 @@ echo:
 	@echo "MYLIBS = $(MYLIBS)"
 	@echo "DL = $(DL)"
 
-$(ALL_O): makefile ltests.h
+$(ALL_O): makefile
 
 # DO NOT EDIT
 # automatically made with 'gcc -MM l*.c'
@@ -141,6 +133,7 @@ lapi.o: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  ltable.h lundump.h lvm.h
 lauxlib.o: lauxlib.c lprefix.h lua.h luaconf.h lauxlib.h
 lbaselib.o: lbaselib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
+lbitlib.o: lbitlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
 lcode.o: lcode.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
  llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \
  ldo.h lgc.h lstring.h ltable.h lvm.h
@@ -155,8 +148,8 @@ ldo.o: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lparser.h lstring.h ltable.h lundump.h lvm.h
 ldump.o: ldump.c lprefix.h lua.h luaconf.h lobject.h llimits.h lstate.h \
  ltm.h lzio.h lmem.h lundump.h
-lfunc.o: lfunc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
- llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h
+lfunc.o: lfunc.c lprefix.h lua.h luaconf.h lfunc.h lobject.h llimits.h \
+ lgc.h lstate.h ltm.h lzio.h lmem.h
 lgc.o: lgc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h
 linit.o: linit.c lprefix.h lua.h luaconf.h lualib.h lauxlib.h
@@ -187,10 +180,10 @@ ltable.o: ltable.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
 ltablib.o: ltablib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
 ltests.o: ltests.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
  lobject.h ltm.h lzio.h lmem.h lauxlib.h lcode.h llex.h lopcodes.h \
- lparser.h lctype.h ldebug.h ldo.h lfunc.h lopnames.h lstring.h lgc.h \
- ltable.h lualib.h
+ lparser.h lctype.h ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h \
+ lualib.h
 ltm.o: ltm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
- llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h
+ llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h ltable.h lvm.h
 lua.o: lua.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
 lundump.o: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
  lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lstring.h lgc.h \
@@ -198,7 +191,7 @@ lundump.o: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
 lutf8lib.o: lutf8lib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
 lvm.o: lvm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h \
- ltable.h lvm.h ljumptab.h
+ ltable.h lvm.h
 lzio.o: lzio.c lprefix.h lua.h luaconf.h llimits.h lmem.h lstate.h \
  lobject.h ltm.h lzio.h
 

manual/2html

@@ -1,4 +1,4 @@
-#!/usr/bin/env lua5.3
+#!/usr/bin/env lua5.2
 
 
 -- special marks:
@@ -12,7 +12,7 @@ header = [[
 <html>
 
 <head>
-<title>Lua 5.4 Reference Manual</title>
+<title>Lua 5.3 Reference Manual</title>
 <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
 <link rel="stylesheet" href="lua.css">
 <link rel="stylesheet" href="manual.css">
@@ -23,14 +23,14 @@ header = [[
 <hr>
 <h1>
 <a href="http://www.lua.org/home.html"><img src="logo.gif" alt="[Lua logo]" border="0"></a>
-Lua 5.4 Reference Manual
+Lua 5.3 Reference Manual
 </h1>
 
 by Roberto Ierusalimschy, Luiz Henrique de Figueiredo, Waldemar Celes
 <p>
 <small>
 <a href="http://www.lua.org/copyright.html">Copyright</a>
-&copy; 2021 Lua.org, PUC-Rio.  All rights reserved.
+&copy; 2015 Lua.org, PUC-Rio.  All rights reserved.
 </small>
 <hr>
 
@@ -324,7 +324,6 @@ N = function (s) return (string.gsub(s, " ", "&nbsp;")) end,
 NE = id,        -- tag"foreignphrase",
 num = id,
 ["nil"] = fixed(Tag.b"nil"),
-fail = fixed(Tag.b"fail"),
 Open = fixed"{",
 part = section("h1", true),
 Pat = compose(verbfixed, prepos("'", "'")),

onelua.c

@@ -1,107 +0,0 @@
-/*
-* one.c -- Lua core, libraries, and interpreter in a single file
-*/
-
-/* default is to build the full interpreter */
-#ifndef MAKE_LIB
-#ifndef MAKE_LUAC
-#ifndef MAKE_LUA
-#define MAKE_LUA
-#endif
-#endif
-#endif
-
-/* choose suitable platform-specific features */
-/* some of these may need extra libraries such as -ldl -lreadline -lncurses */
-#if 0
-#define LUA_USE_LINUX
-#define LUA_USE_MACOSX
-#define LUA_USE_POSIX
-#define LUA_ANSI
-#endif
-
-/* no need to change anything below this line ----------------------------- */
-
-#include "lprefix.h"
-
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include <float.h>
-#include <limits.h>
-#include <locale.h>
-#include <math.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-
-/* setup for luaconf.h */
-#define LUA_CORE
-#define LUA_LIB
-#define ltable_c
-#define lvm_c
-#include "luaconf.h"
-
-/* do not export internal symbols */
-#undef LUAI_FUNC
-#undef LUAI_DDEC
-#undef LUAI_DDEF
-#define LUAI_FUNC	static
-#define LUAI_DDEC(def)	/* empty */
-#define LUAI_DDEF	static
-
-/* core -- used by all */
-#include "lzio.c"
-#include "lctype.c"
-#include "lopcodes.c"
-#include "lmem.c"
-#include "lundump.c"
-#include "ldump.c"
-#include "lstate.c"
-#include "lgc.c"
-#include "llex.c"
-#include "lcode.c"
-#include "lparser.c"
-#include "ldebug.c"
-#include "lfunc.c"
-#include "lobject.c"
-#include "ltm.c"
-#include "lstring.c"
-#include "ltable.c"
-#include "ldo.c"
-#include "lvm.c"
-#include "lapi.c"
-
-/* auxiliary library -- used by all */
-#include "lauxlib.c"
-
-/* standard library  -- not used by luac */
-#ifndef MAKE_LUAC
-#include "lbaselib.c"
-#include "lcorolib.c"
-#include "ldblib.c"
-#include "liolib.c"
-#include "lmathlib.c"
-#include "loadlib.c"
-#include "loslib.c"
-#include "lstrlib.c"
-#include "ltablib.c"
-#include "lutf8lib.c"
-#include "linit.c"
-#endif
-
-/* lua */
-#ifdef MAKE_LUA
-#include "lua.c"
-#endif
-
-/* luac */
-#ifdef MAKE_LUAC
-#include "luac.c"
-#endif

testes/all.lua

@@ -1,17 +1,17 @@
 #!../lua
--- $Id: testes/all.lua $
+-- $Id: all.lua,v 1.95 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice at the end of this file
 
 
-local version = "Lua 5.4"
+local version = "Lua 5.3"
 if _VERSION ~= version then
-  io.stderr:write("This test suite is for ", version,
-                  ", not for ", _VERSION, "\nExiting tests")
+  io.stderr:write("\nThis test suite is for ", version, ", not for ", _VERSION,
+    "\nExiting tests\n")
   return
 end
 
 
-_G.ARG = arg   -- save arg for other tests
+_G._ARG = arg   -- save arg for other tests
 
 
 -- next variables control the execution of some tests
@@ -37,13 +37,13 @@ end
 -- tests should require debug when needed
 debug = nil
 
-
 if usertests then
   T = nil    -- no "internal" tests for user tests
 else
   T = rawget(_G, "T")  -- avoid problems with 'strict' module
 end
 
+math.randomseed(0)
 
 --[=[
   example of a long [comment],
@@ -51,14 +51,6 @@ end
 
 ]=]
 
-print("\n\tStarting Tests")
-
-do
-  -- set random seed
-  local random_x, random_y = math.randomseed()
-  print(string.format("random seeds: %d, %d", random_x, random_y))
-end
-
 print("current path:\n****" .. package.path .. "****\n")
 
 
@@ -100,8 +92,6 @@ local function F (m)
   end
 end
 
-local Cstacklevel
-
 local showmem
 if not T then
   local max = 0
@@ -111,7 +101,6 @@ if not T then
     print(format("    ---- total memory: %s, max memory: %s ----\n",
           F(m), F(max)))
   end
-  Cstacklevel = function () return 0 end   -- no info about stack level
 else
   showmem = function ()
     T.checkmemory()
@@ -125,16 +114,9 @@ else
                  T.totalmem"string", T.totalmem"table", T.totalmem"function",
                  T.totalmem"userdata", T.totalmem"thread"))
   end
-
-  Cstacklevel = function ()
-    local _, _, ncalls = T.stacklevel()
-    return ncalls    -- number of C calls
-  end
 end
 
 
-local Cstack = Cstacklevel()
-
 --
 -- redefine dofile to run files through dump/undump
 --
@@ -154,8 +136,18 @@ end
 
 dofile('main.lua')
 
--- trace GC cycles
-require"tracegc".start()
+do
+  local next, setmetatable, stderr = next, setmetatable, io.stderr
+  -- track collections
+  local mt = {}
+  -- each time a table is collected, remark it for finalization
+  -- on next cycle
+  mt.__gc = function (o)
+     stderr:write'.'    -- mark progress
+     local n = setmetatable(o, mt)   -- remark it
+   end
+   local n = setmetatable({}, mt)    -- create object
+end
 
 report"gc.lua"
 local f = assert(loadfile('gc.lua'))
@@ -167,7 +159,7 @@ olddofile('strings.lua')
 olddofile('literals.lua')
 dofile('tpack.lua')
 assert(dofile('attrib.lua') == 27)
-dofile('gengc.lua')
+
 assert(dofile('locals.lua') == 5)
 dofile('constructs.lua')
 dofile('code.lua', true)
@@ -177,7 +169,6 @@ if not _G._soft then
   assert(f() == 'b')
   assert(f() == 'a')
 end
-dofile('cstack.lua')
 dofile('nextvar.lua')
 dofile('pm.lua')
 dofile('utf8.lua')
@@ -195,19 +186,13 @@ assert(dofile('verybig.lua', true) == 10); collectgarbage()
 dofile('files.lua')
 
 if #msgs > 0 then
-  local m = table.concat(msgs, "\n  ")
-  warn("#tests not performed:\n  ", m, "\n")
+  print("\ntests not performed:")
+  for i=1,#msgs do
+    print(msgs[i])
+  end
+  print()
 end
 
-print("(there should be two warnings now)")
-warn("@on")
-warn("#This is ", "an expected", " warning")
-warn("@off")
-warn("******** THIS WARNING SHOULD NOT APPEAR **********")
-warn("******** THIS WARNING ALSO SHOULD NOT APPEAR **********")
-warn("@on")
-warn("#This is", " another one")
-
 -- no test module should define 'debug'
 assert(debug == nil)
 
@@ -221,16 +206,11 @@ debug.sethook(function (a) assert(type(a) == 'string') end, "cr")
 -- to survive outside block
 _G.showmem = showmem
 
-
-assert(Cstack == Cstacklevel(),
-  "should be at the same C-stack level it was when started the tests")
-
 end   --)
 
-local _G, showmem, print, format, clock, time, difftime,
-      assert, open, warn =
+local _G, showmem, print, format, clock, time, difftime, assert, open =
       _G, showmem, print, string.format, os.clock, os.time, os.difftime,
-      assert, io.open, warn
+      assert, io.open
 
 -- file with time of last performed test
 local fname = T and "time-debug.txt" or "time.txt"
@@ -251,7 +231,7 @@ end
 print('cleaning all!!!!')
 for n in pairs(_G) do
   if not ({___Glob = 1, tostring = 1})[n] then
-    _G[n] = undef
+    _G[n] = nil
   end
 end
 
@@ -274,7 +254,7 @@ if not usertests then
   local diff = (clocktime - lasttime) / lasttime
   local tolerance = 0.05    -- 5%
   if (diff >= tolerance or diff <= -tolerance) then
-    warn(format("#time difference from previous test: %+.1f%%",
+    print(format("WARNING: time difference from previous test: %+.1f%%",
                   diff * 100))
   end
   assert(open(fname, "w")):write(clocktime):close()

testes/api.lua

@@ -1,4 +1,4 @@
--- $Id: testes/api.lua $
+-- $Id: api.lua,v 1.147 2016/11/07 13:06:25 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 if T==nil then
@@ -11,9 +11,6 @@ local debug = require "debug"
 local pack = table.pack
 
 
--- standard error message for memory errors
-local MEMERRMSG = "not enough memory"
-
 function tcheck (t1, t2)
   assert(t1.n == (t2.n or #t2) + 1)
   for i = 2, t1.n do assert(t1[i] == t2[i - 1]) end
@@ -114,18 +111,7 @@ do   -- testing 'rotate'
   tcheck(t, {10, 20, 30, 40})
 end
 
-
--- testing warnings
-T.testC([[
-  warningC "#This shold be a"
-  warningC " single "
-  warning "warning"
-  warningC "#This should be "
-  warning "another one"
-]])
-
-
--- testing message handlers
+-- testing non-function message handlers
 do
   local f = T.makeCfunc[[
     getglobal error
@@ -135,11 +121,14 @@ do
     return 2     # return error message and status
   ]]
 
-  local msg, st = f(string.upper)   -- function handler
-  assert(st == "ERRRUN" and msg == "BOLA")
-  local msg, st = f(string.len)     -- function handler
-  assert(st == "ERRRUN" and msg == 4)
+  local msg, st = f({})     -- invalid handler
+  assert(st == "ERRERR" and string.find(msg, "error handling"))
+  local msg, st = f(nil)     -- invalid handler
+  assert(st == "ERRERR" and string.find(msg, "error handling"))
 
+  local a = setmetatable({}, {__call = function (_, x) return x:upper() end})
+  local msg, st = f(a)   -- callable handler
+  assert(st == "ERRRUN" and msg == "BOLA")
 end
 
 t = pack(T.testC("insert 3; pushvalue 3; remove 3; pushvalue 2; remove 2; \
@@ -244,23 +233,6 @@ assert(a == 20 and b == false)
 a,b = T.testC("compare LE 5 -6, return 2", a1, 2, 2, a1, 2, 20)
 assert(a == 20 and b == true)
 
-
-do  -- testing lessthan and lessequal with metamethods
-  local mt = {__lt = function (a,b) return a[1] < b[1] end,
-              __le = function (a,b) return a[1] <= b[1] end,
-              __eq = function (a,b) return a[1] == b[1] end}
-  local function O (x)
-    return setmetatable({x}, mt)
-  end
-
-  local a, b = T.testC("compare LT 2 3; pushint 10; return 2", O(1), O(2))
-  assert(a == true and b == 10)
-  local a, b = T.testC("compare LE 2 3; pushint 10; return 2", O(3), O(2))
-  assert(a == false and b == 10)
-  local a, b = T.testC("compare EQ 2 3; pushint 10; return 2", O(3), O(3))
-  assert(a == true and b == 10)
-end
-
 -- testing length
 local t = setmetatable({x = 20}, {__len = function (t) return t.x end})
 a,b,c = T.testC([[
@@ -350,7 +322,6 @@ function to (s, x, n)
   return T.testC(string.format("%s %d; return 1", s, n), x)
 end
 
-local null = T.pushuserdata(0)
 local hfunc = string.gmatch("", "")    -- a "heavy C function" (with upvalues)
 assert(debug.getupvalue(hfunc, 1))
 assert(to("tostring", {}) == nil)
@@ -368,22 +339,13 @@ assert(to("tonumber", {}) == 0)
 assert(to("tonumber", "12") == 12)
 assert(to("tonumber", "s2") == 0)
 assert(to("tonumber", 1, 20) == 0)
-assert(to("topointer", 10) == null)
-assert(to("topointer", true) == null)
-assert(to("topointer", nil) == null)
-assert(to("topointer", "abc") ~= null)
-assert(to("topointer", string.rep("x", 10)) ==
-       to("topointer", string.rep("x", 10)))    -- short strings
-do    -- long strings
-  local s1 = string.rep("x", 300)
-  local s2 = string.rep("x", 300)
-  assert(to("topointer", s1) ~= to("topointer", s2))
-end
-assert(to("topointer", T.pushuserdata(20)) ~= null)
-assert(to("topointer", io.read) ~= null)           -- light C function
-assert(to("topointer", hfunc) ~= null)        -- "heavy" C function
-assert(to("topointer", function () end) ~= null)   -- Lua function
-assert(to("topointer", io.stdin) ~= null)   -- full userdata
+assert(to("topointer", 10) == 0)
+assert(to("topointer", true) == 0)
+assert(to("topointer", T.pushuserdata(20)) == 20)
+assert(to("topointer", io.read) ~= 0)           -- light C function
+assert(to("topointer", hfunc) ~= 0)        -- "heavy" C function
+assert(to("topointer", function () end) ~= 0)   -- Lua function
+assert(to("topointer", io.stdin) ~= 0)   -- full userdata
 assert(to("func2num", 20) == 0)
 assert(to("func2num", T.pushuserdata(10)) == 0)
 assert(to("func2num", io.read) ~= 0)     -- light C function
@@ -407,11 +369,11 @@ do
   -- "argerror" without frames
   assert(T.checkpanic("loadstring 4") ==
       "bad argument #4 (string expected, got no value)")
-
+  
 
   -- memory error
   T.totalmem(T.totalmem()+10000)   -- set low memory limit (+10k)
-  assert(T.checkpanic("newuserdata 20000") == MEMERRMSG)
+  assert(T.checkpanic("newuserdata 20000") == "not enough memory")
   T.totalmem(0)          -- restore high limit
 
   -- stack error
@@ -424,23 +386,6 @@ do
     assert(string.find(msg, "stack overflow"))
   end
 
-  -- exit in panic still close to-be-closed variables
-  assert(T.checkpanic([[
-    pushstring "return {__close = function () Y = 'ho'; end}"
-    newtable
-    loadstring -2
-    call 0 1
-    setmetatable -2
-    toclose -1
-    pushstring "hi"
-    error
-  ]],
-  [[
-    getglobal Y
-    concat 2         # concat original error with global Y
-  ]]) == "hiho")
-
-
 end
 
 -- testing deep C stack
@@ -475,7 +420,7 @@ prog[#prog + 1] = "return 2"
 prog = table.concat(prog, ";")
 local g, t = T.testC(prog)
 assert(g == _G)
-for i = 1,lim do assert(t[i] == i*10); t[i] = undef end
+for i = 1,lim do assert(t[i] == i*10); t[i] = nil end
 assert(next(t) == nil)
 prog, g, t = nil
 
@@ -507,12 +452,10 @@ function checkerrnopro (code, msg)
 end
 
 if not _soft then
-  collectgarbage("stop")   -- avoid __gc with full stack
   checkerrnopro("pushnum 3; call 0 0", "attempt to call")
   print"testing stack overflow in unprotected thread"
   function f () f() end
   checkerrnopro("getglobal 'f'; call 0 0;", "stack overflow")
-  collectgarbage("restart")
 end
 print"+"
 
@@ -521,57 +464,9 @@ print"+"
 
 do   -- getp/setp
   local a = {}
-  local a1 = T.testC("rawsetp 2 1; return 1", a, 20)
-  assert(a == a1)
+  T.testC("rawsetp 2 1", a, 20)
   assert(a[T.pushuserdata(1)] == 20)
-  local a1, res = T.testC("rawgetp -1 1; return 2", a)
-  assert(a == a1 and res == 20)
-end
-
-
-do  -- using the table itself as index
-  local a = {}
-  a[a] = 10
-  local prog = "gettable -1; return *"
-  local res = {T.testC(prog, a)}
-  assert(#res == 2 and res[1] == prog and res[2] == 10)
-
-  local prog = "settable -2; return *"
-  local res = {T.testC(prog, a, 20)}
-  assert(a[a] == 20)
-  assert(#res == 1 and res[1] == prog)
-
-  -- raw
-  a[a] = 10
-  local prog = "rawget -1; return *"
-  local res = {T.testC(prog, a)}
-  assert(#res == 2 and res[1] == prog and res[2] == 10)
-
-  local prog = "rawset -2; return *"
-  local res = {T.testC(prog, a, 20)}
-  assert(a[a] == 20)
-  assert(#res == 1 and res[1] == prog)
-
-  -- using the table as the value to set
-  local prog = "rawset -1; return *"
-  local res = {T.testC(prog, 30, a)}
-  assert(a[30] == a)
-  assert(#res == 1 and res[1] == prog)
-
-  local prog = "settable -1; return *"
-  local res = {T.testC(prog, 40, a)}
-  assert(a[40] == a)
-  assert(#res == 1 and res[1] == prog)
-
-  local prog = "rawseti -1 100; return *"
-  local res = {T.testC(prog, a)}
-  assert(a[100] == a)
-  assert(#res == 1 and res[1] == prog)
-
-  local prog = "seti -1 200; return *"
-  local res = {T.testC(prog, a)}
-  assert(a[200] == a)
-  assert(#res == 1 and res[1] == prog)
+  assert(T.testC("rawgetp 2 1; return 1", a) == 20)
 end
 
 a = {x=0, y=12}
@@ -684,52 +579,33 @@ checkerr("got number", debug.setuservalue, 3, {})
 checkerr("got nil", debug.setuservalue, nil, {})
 checkerr("got light userdata", debug.setuservalue, T.pushuserdata(1), {})
 
--- testing multiple user values
-local b = T.newuserdata(0, 10)
-for i = 1, 10 do
-  local v, p = debug.getuservalue(b, i)
-  assert(v == nil and p)
-end
-do   -- indices out of range
-  local v, p = debug.getuservalue(b, -2)
-  assert(v == nil and not p)
-  local v, p = debug.getuservalue(b, 11)
-  assert(v == nil and not p)
-end
-local t = {true, false, 4.56, print, {}, b, "XYZ"}
-for k, v in ipairs(t) do
-  debug.setuservalue(b, v, k)
-end
-for k, v in ipairs(t) do
-  local v1, p = debug.getuservalue(b, k)
-  assert(v1 == v and p)
+local b = T.newuserdata(0)
+assert(debug.getuservalue(b) == nil)
+for _, v in pairs{true, false, 4.56, print, {}, b, "XYZ"} do
+  assert(debug.setuservalue(b, v) == b)
+  assert(debug.getuservalue(b) == v)
 end
 
-assert(not debug.getuservalue(4))
+assert(debug.getuservalue(4) == nil)
 
-debug.setuservalue(b, function () return 10 end, 10)
+debug.setuservalue(b, function () return 10 end)
 collectgarbage()   -- function should not be collected
-assert(debug.getuservalue(b, 10)() == 10)
+assert(debug.getuservalue(b)() == 10)
 
 debug.setuservalue(b, 134)
 collectgarbage()   -- number should not be a problem for collector
 assert(debug.getuservalue(b) == 134)
 
-
 -- test barrier for uservalues
-do
-  local oldmode = collectgarbage("incremental")
-  T.gcstate("atomic")
-  assert(T.gccolor(b) == "black")
-  debug.setuservalue(b, {x = 100})
-  T.gcstate("pause")  -- complete collection
-  assert(debug.getuservalue(b).x == 100)  -- uvalue should be there
-  collectgarbage(oldmode)
-end
+T.gcstate("atomic")
+assert(T.gccolor(b) == "black")
+debug.setuservalue(b, {x = 100})
+T.gcstate("pause")  -- complete collection
+assert(debug.getuservalue(b).x == 100)  -- uvalue should be there
 
 -- long chain of userdata
 for i = 1, 1000 do
-  local bb = T.newuserdata(0, 1)
+  local bb = T.newuserdata(0)
   debug.setuservalue(bb, b)
   b = bb
 end
@@ -800,17 +676,17 @@ local F
 F = function (x)
   local udval = T.udataval(x)
   table.insert(cl, udval)
-  local d = T.newuserdata(100)   -- create garbage
+  local d = T.newuserdata(100)   -- cria lixo
   d = nil
   assert(debug.getmetatable(x).__gc == F)
-  assert(load("table.insert({}, {})"))()   -- create more garbage
-  collectgarbage()   -- force a GC during GC
-  assert(debug.getmetatable(x).__gc == F)  -- previous GC did not mess this?
-  local dummy = {}    -- create more garbage during GC
+  assert(load("table.insert({}, {})"))()   -- cria mais lixo
+  collectgarbage()   -- forca coleta de lixo durante coleta!
+  assert(debug.getmetatable(x).__gc == F)   -- coleta anterior nao melou isso?
+  local dummy = {}    -- cria lixo durante coleta
   if A ~= nil then
     assert(type(A) == "userdata")
     assert(T.udataval(A) == B)
-    debug.getmetatable(A)    -- just access it
+    debug.getmetatable(A)    -- just acess it
   end
   A = x   -- ressucita userdata
   B = udval
@@ -925,7 +801,7 @@ x = T.udataval(x)
 collectgarbage()
 -- old `x' cannot be collected (`a' still uses it)
 assert(#cl == 0)
-for n in pairs(a) do a[n] = undef end
+for n in pairs(a) do a[n] = nil end
 collectgarbage()
 assert(#cl == 1 and cl[1] == x)   -- old `x' must be collected
 
@@ -984,25 +860,30 @@ assert(t[7] == nil)
 
 -------------------------------------------------------------------------
 do   -- testing errors during GC
-  warn("@off")
-  collectgarbage("stop")
   local a = {}
   for i=1,20 do
     a[i] = T.newuserdata(i)   -- creates several udata
   end
   for i=1,20,2 do   -- mark half of them to raise errors during GC
-    debug.setmetatable(a[i],
-      {__gc = function (x) error("@expected error in gc") end})
+    debug.setmetatable(a[i], {__gc = function (x) error("error inside gc") end})
   end
   for i=2,20,2 do   -- mark the other half to count and to create more garbage
     debug.setmetatable(a[i], {__gc = function (x) load("A=A+1")() end})
   end
-  a = nil
   _G.A = 0
-  collectgarbage()
+  a = 0
+  while 1 do
+    local stat, msg = pcall(collectgarbage)
+    if stat then
+      break   -- stop when no more errors
+    else
+      a = a + 1
+      assert(string.find(msg, "__gc"))
+    end
+  end
+  assert(a == 10)  -- number of errors
+
   assert(A == 10)  -- number of normal collections
-  collectgarbage("restart")
-  warn("@on")
 end
 -------------------------------------------------------------------------
 -- test for userdata vals
@@ -1068,230 +949,45 @@ T.closestate(L1)
 L1 = nil
 
 print('+')
+
 -------------------------------------------------------------------------
--- testing to-be-closed variables
+-- testing memory limits
 -------------------------------------------------------------------------
-print"testing to-be-closed variables"
-
-do
-  local openresource = {}
-
-  local function newresource ()
-    local x = setmetatable({10}, {__close = function(y)
-      assert(openresource[#openresource] == y)
-      openresource[#openresource] = nil
-      y[1] = y[1] + 1
-    end})
-    openresource[#openresource + 1] = x
-    return x
-  end
-
-  local a, b = T.testC([[
-    call 0 1   # create resource
-    pushnil
-    toclose -2  # mark call result to be closed
-    toclose -1  # mark nil to be closed (will be ignored)
-    return 2
-  ]], newresource)
-  assert(a[1] == 11 and b == nil)
-  assert(#openresource == 0)    -- was closed
-
-  -- repeat the test, but calling function in a 'multret' context
-  local a = {T.testC([[
-    call 0 1   # create resource
-    toclose 2 # mark it to be closed
-    return 2
-  ]], newresource)}
-  assert(type(a[1]) == "string" and a[2][1] == 11)
-  assert(#openresource == 0)    -- was closed
-
-  -- closing by error
-  local a, b = pcall(T.makeCfunc[[
-    call 0 1   # create resource
-    toclose -1 # mark it to be closed
-    error       # resource is the error object
-  ]], newresource)
-  assert(a == false and b[1] == 11)
-  assert(#openresource == 0)    -- was closed
-
-  -- non-closable value
-  local a, b = pcall(T.makeCfunc[[
-    newtable   # create non-closable object
-    toclose -1 # mark it to be closed (should raise an error)
-    abort  # will not be executed
-  ]])
-  assert(a == false and
-    string.find(b, "non%-closable value"))
-
-  local function check (n)
-    assert(#openresource == n)
-  end
-
-  -- closing resources with 'closeslot'
-  _ENV.xxx = true
-  local a = T.testC([[
-    pushvalue 2  # stack: S, NR, CH, NR
-    call 0 1   # create resource; stack: S, NR, CH, R
-    toclose -1 # mark it to be closed
-    pushvalue 2  #  stack: S, NR, CH, R, NR
-    call 0 1   # create another resource; stack: S, NR, CH, R, R
-    toclose -1 # mark it to be closed
-    pushvalue 3  # stack: S, NR, CH, R, R, CH
-    pushint 2   # there should be two open resources
-    call 1 0  #  stack: S, NR, CH, R, R
-    closeslot -1   # close second resource
-    pushvalue 3  # stack: S, NR, CH, R, R, CH
-    pushint 1   # there should be one open resource
-    call 1 0  # stack: S, NR, CH, R, R
-    closeslot 4
-    setglobal "xxx"  # previous op. erased the slot
-    pop 1       # pop other resource from the stack
-    pushint *
-    return 1    # return stack size
-  ]], newresource, check)
-  assert(a == 3 and _ENV.xxx == nil)   -- no extra items left in the stack
-
-  -- closing resources with 'pop'
-  local a = T.testC([[
-    pushvalue 2  # stack: S, NR, CH, NR
-    call 0 1   # create resource; stack: S, NR, CH, R
-    toclose -1 # mark it to be closed
-    pushvalue 2  #  stack: S, NR, CH, R, NR
-    call 0 1   # create another resource; stack: S, NR, CH, R, R
-    toclose -1 # mark it to be closed
-    pushvalue 3  # stack: S, NR, CH, R, R, CH
-    pushint 2   # there should be two open resources
-    call 1 0  #  stack: S, NR, CH, R, R
-    pop 1   # pop second resource
-    pushvalue 3  # stack: S, NR, CH, R, CH
-    pushint 1   # there should be one open resource
-    call 1 0  # stack: S, NR, CH, R
-    pop 1       # pop other resource from the stack
-    pushvalue 3  # stack: S, NR, CH, CH
-    pushint 0   # there should be no open resources
-    call 1 0  # stack: S, NR, CH
-    pushint *
-    return 1    # return stack size
-  ]], newresource, check)
-  assert(a == 3)   -- no extra items left in the stack
-
-  -- non-closable value
-  local a, b = pcall(T.makeCfunc[[
-    pushint 32
-    toclose -1
-  ]])
-  assert(not a and string.find(b, "(C temporary)"))
-
-end
-
-
---[[
-** {==================================================================
-** Testing memory limits
-** ===================================================================
---]]
-
-print("memory-allocation errors")
-
 checkerr("block too big", T.newuserdata, math.maxinteger)
 collectgarbage()
-local f = load"local a={}; for i=1,100000 do a[i]=i end"
-T.alloccount(10)
-checkerr(MEMERRMSG, f)
-T.alloccount()          -- remove limit
+T.totalmem(T.totalmem()+5000)   -- set low memory limit (+5k)
+checkerr("not enough memory", load"local a={}; for i=1,100000 do a[i]=i end")
+T.totalmem(0)          -- restore high limit
 
-
--- test memory errors; increase limit for maximum memory by steps,
--- o that we get memory errors in all allocations of a given
--- task, until there is enough memory to complete the task without
--- errors.
-function testbytes (s, f)
-  collectgarbage()
+-- test memory errors; increase memory limit in small steps, so that
+-- we get memory errors in different parts of a given task, up to there
+-- is enough memory to complete the task without errors
+function testamem (s, f)
+  collectgarbage(); collectgarbage()
   local M = T.totalmem()
   local oldM = M
   local a,b = nil
-  while true do
-    collectgarbage(); collectgarbage()
+  while 1 do
+    M = M+7   -- increase memory limit in small steps
     T.totalmem(M)
-    a, b = T.testC("pcall 0 1 0; pushstatus; return 2", f)
-    T.totalmem(0)  -- remove limit
-    if a and b == "OK" then break end       -- stop when no more errors
-    if b ~= "OK" and b ~= MEMERRMSG then    -- not a memory error?
-      error(a, 0)   -- propagate it
+    a, b = pcall(f)
+    T.totalmem(0)  -- restore high limit
+    if a and b then break end       -- stop when no more errors
+    collectgarbage()
+    if not a and not    -- `real' error?
+      (string.find(b, "memory") or string.find(b, "overflow")) then
+      error(b, 0)   -- propagate it
     end
-    M = M + 7   -- increase memory limit
   end
-  print(string.format("minimum memory for %s: %d bytes", s, M - oldM))
-  return a
+  print("\nlimit for " .. s .. ": " .. M-oldM)
+  return b
 end
 
--- test memory errors; increase limit for number of allocations one
--- by one, so that we get memory errors in all allocations of a given
--- task, until there is enough allocations to complete the task without
--- errors.
-
-function testalloc (s, f)
-  collectgarbage()
-  local M = 0
-  local a,b = nil
-  while true do
-    collectgarbage(); collectgarbage()
-    T.alloccount(M)
-    a, b = T.testC("pcall 0 1 0; pushstatus; return 2", f)
-    T.alloccount()  -- remove limit
-    if a and b == "OK" then break end       -- stop when no more errors
-    if b ~= "OK" and b ~= MEMERRMSG then    -- not a memory error?
-      error(a, 0)   -- propagate it
-    end
-    M = M + 1   -- increase allocation limit
-  end
-  print(string.format("minimum allocations for %s: %d allocations", s, M))
-  return a
-end
-
-
-local function testamem (s, f)
-  testalloc(s, f)
-  return testbytes(s, f)
-end
-
-
--- doing nothing
-b = testamem("doing nothing", function () return 10 end)
-assert(b == 10)
 
 -- testing memory errors when creating a new state
 
-testamem("state creation", function ()
-  local st = T.newstate()
-  if st then T.closestate(st) end   -- close new state
-  return st
-end)
-
-testamem("empty-table creation", function ()
-  return {}
-end)
-
-testamem("string creation", function ()
-  return "XXX" .. "YYY"
-end)
-
-testamem("coroutine creation", function()
-           return coroutine.create(print)
-end)
-
-
--- testing to-be-closed variables
-testamem("to-be-closed variables", function()
-  local flag
-  do
-    local x <close> =
-              setmetatable({}, {__close = function () flag = true end})
-    flag = false
-    local x = {}
-  end
-  return flag
-end)
+b = testamem("state creation", T.newstate)
+T.closestate(b);  -- close new state
 
 
 -- testing threads
@@ -1313,7 +1009,7 @@ G=0; collectgarbage(); a =collectgarbage("count")
 load(expand(20,"G=G+1"))()
 assert(G==20); collectgarbage();  -- assert(gcinfo() <= a+1)
 
-testamem("running code on new thread", function ()
+testamem("thread creation", function ()
   return T.doonnewstack("x=1") == 0  -- try to create thread
 end)
 
@@ -1349,7 +1045,7 @@ assert(_G.a == "aaax")
 
 -- other generic tests
 
-testamem("gsub", function ()
+testamem("string creation", function ()
   local a, b = string.gsub("alo alo", "(a)", function (x) return x..'b' end)
   return (a == 'ablo ablo')
 end)
@@ -1384,13 +1080,13 @@ end)
 local a = 1
 close = nil
 testamem("closure creation", function ()
-  function close (b)
-   return function (x) return b + x end
+  function close (b,c)
+   return function (x) return a+b+c+x end
   end
-  return (close(2)(4) == 6)
+  return (close(2,3)(4) == 10)
 end)
 
-testamem("using coroutines", function ()
+testamem("coroutines", function ()
   local a = coroutine.wrap(function ()
               coroutine.yield(string.rep("a", 10))
               return {}
@@ -1407,64 +1103,6 @@ do   -- auxiliary buffer
   end)
 end
 
-testamem("growing stack", function ()
-  local function foo (n)
-    if n == 0 then return 1 else return 1 + foo(n - 1) end
-  end
-  return foo(100)
-end)
-
--- }==================================================================
-
-
-do   -- testing failing in 'lua_checkstack'
-  local res = T.testC([[rawcheckstack 500000; return 1]])
-  assert(res == false)
-  local L = T.newstate()
-  T.alloccount(0)   -- will be unable to reallocate the stack
-  res = T.testC(L, [[rawcheckstack 5000; return 1]])
-  T.alloccount()
-  T.closestate(L)
-  assert(res == false)
-end
-
-do   -- closing state with no extra memory
-  local L = T.newstate()
-  T.alloccount(0)
-  T.closestate(L)
-  T.alloccount()
-end
-
-do   -- garbage collection with no extra memory
-  local L = T.newstate()
-  T.loadlib(L)
-  local res = (T.doremote(L, [[
-    _ENV = require"_G"
-    local T = require"T"
-    local a = {}
-    for i = 1, 1000 do a[i] = 'i' .. i end    -- grow string table
-    local stsize, stuse = T.querystr()
-    assert(stuse > 1000)
-    local function foo (n)
-      if n > 0 then foo(n - 1) end
-    end
-    foo(180)    -- grow stack
-    local _, stksize = T.stacklevel()
-    assert(stksize > 180)
-    a = nil
-    T.alloccount(0)
-    collectgarbage()
-    T.alloccount()
-    -- stack and string table could not be reallocated,
-    -- so they kept their sizes (without errors)
-    assert(select(2, T.stacklevel()) == stksize)
-    assert(T.querystr() == stsize)
-    return 'ok'
-  ]]))
-  assert(res == 'ok')
-  T.closestate(L)
-end
-
 print'+'
 
 -- testing some auxlib functions

testes/attrib.lua

@@ -1,4 +1,4 @@
--- $Id: testes/attrib.lua $
+-- $Id: attrib.lua,v 1.65 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print "testing require"
@@ -28,7 +28,7 @@ do
   local path = table.concat(t, ";")
   -- use that path in a search
   local s, err = package.searchpath("xuxu", path)
-  -- search fails; check that message has an occurrence of
+  -- search fails; check that message has an occurence of
   -- '??????????' with ? replaced by xuxu and at least 'max' lines
   assert(not s and
          string.find(err, string.rep("xuxu", 10)) and
@@ -47,29 +47,6 @@ do
   package.path = oldpath
 end
 
-
-do  print"testing 'require' message"
-  local oldpath = package.path
-  local oldcpath = package.cpath
-
-  package.path = "?.lua;?/?"
-  package.cpath = "?.so;?/init"
-
-  local st, msg = pcall(require, 'XXX')
-
-  local expected = [[module 'XXX' not found:
-	no field package.preload['XXX']
-	no file 'XXX.lua'
-	no file 'XXX/XXX'
-	no file 'XXX.so'
-	no file 'XXX/init']]
-
-  assert(msg == expected)
-
-  package.path = oldpath
-  package.cpath = oldcpath
-end
-
 print('+')
 
 
@@ -145,13 +122,12 @@ local oldpath = package.path
 
 package.path = string.gsub("D/?.lua;D/?.lc;D/?;D/??x?;D/L", "D/", DIR)
 
-local try = function (p, n, r, ext)
+local try = function (p, n, r)
   NAME = nil
-  local rr, x = require(p)
+  local rr = require(p)
   assert(NAME == n)
   assert(REQUIRED == p)
   assert(rr == r)
-  assert(ext == x)
 end
 
 a = require"names"
@@ -167,27 +143,27 @@ assert(package.searchpath("C", package.path) == D"C.lua")
 assert(require"C" == 25)
 assert(require"C" == 25)
 AA = nil
-try('B', 'B.lua', true, "libs/B.lua")
+try('B', 'B.lua', true)
 assert(package.loaded.B)
 assert(require"B" == true)
 assert(package.loaded.A)
 assert(require"C" == 25)
 package.loaded.A = nil
-try('B', nil, true, nil)   -- should not reload package
-try('A', 'A.lua', true, "libs/A.lua")
+try('B', nil, true)   -- should not reload package
+try('A', 'A.lua', true)
 package.loaded.A = nil
 os.remove(D'A.lua')
 AA = {}
-try('A', 'A.lc', AA, "libs/A.lc")  -- now must find second option
+try('A', 'A.lc', AA)  -- now must find second option
 assert(package.searchpath("A", package.path) == D"A.lc")
 assert(require("A") == AA)
 AA = false
-try('K', 'L', false, "libs/L")     -- default option
-try('K', 'L', false, "libs/L")     -- default option (should reload it)
+try('K', 'L', false)     -- default option
+try('K', 'L', false)     -- default option (should reload it)
 assert(rawget(_G, "_REQUIREDNAME") == nil)
 
 AA = "x"
-try("X", "XXxX", AA, "libs/XXxX")
+try("X", "XXxX", AA)
 
 
 removefiles(files)
@@ -207,16 +183,14 @@ files = {
 createfiles(files, "_ENV = {}\n", "\nreturn _ENV\n")
 AA = 0
 
-local m, ext = assert(require"P1")
-assert(ext == "libs/P1/init.lua")
+local m = assert(require"P1")
 assert(AA == 0 and m.AA == 10)
 assert(require"P1" == m)
 assert(require"P1" == m)
 
 assert(package.searchpath("P1.xuxu", package.path) == D"P1/xuxu.lua")
-m.xuxu, ext = assert(require"P1.xuxu")
+m.xuxu = assert(require"P1.xuxu")
 assert(AA == 0 and m.xuxu.AA == 20)
-assert(ext == "libs/P1/xuxu.lua")
 assert(require"P1.xuxu" == m.xuxu)
 assert(require"P1.xuxu" == m.xuxu)
 assert(require"P1" == m and m.AA == 10)
@@ -293,17 +267,15 @@ else
 
   -- test C modules with prefixes in names
   package.cpath = DC"?"
-  local lib2, ext = require"lib2-v2"
-  assert(string.find(ext, "libs/lib2-v2", 1, true))
+  local lib2 = require"lib2-v2"
   -- check correct access to global environment and correct
   -- parameters
   assert(_ENV.x == "lib2-v2" and _ENV.y == DC"lib2-v2")
-  assert(lib2.id("x") == true)   -- a different "id" implementation
+  assert(lib2.id("x") == "x")
 
   -- test C submodules
-  local fs, ext = require"lib1.sub"
+  local fs = require"lib1.sub"
   assert(_ENV.x == "lib1.sub" and _ENV.y == DC"lib1")
-  assert(string.find(ext, "libs/lib1", 1, true))
   assert(fs.id(45) == 45)
 end
 
@@ -321,10 +293,10 @@ do
     return _ENV
   end
 
-  local pl, ext = require"pl"
+  local pl = require"pl"
   assert(require"pl" == pl)
   assert(pl.xuxu(10) == 30)
-  assert(pl[1] == "pl" and pl[2] == ":preload:" and ext == ":preload:")
+  assert(pl[1] == "pl" and pl[2] == nil)
 
   package = p
   assert(type(package.path) == "string")
@@ -416,7 +388,7 @@ assert(a[a][a][a][a][print] == assert)
 a[print](a[a[f]] == a[print])
 assert(not pcall(function () local a = {}; a[nil] = 10 end))
 assert(not pcall(function () local a = {[nil] = 10} end))
-assert(a[nil] == undef)
+assert(a[nil] == nil)
 a = nil
 
 a = {10,9,8,7,6,5,4,3,2; [-3]='a', [f]=print, a='a', b='ab'}
@@ -425,30 +397,19 @@ assert(a[1]==10 and a[-3]==a.a and a[f]==print and a.x=='a' and not a.y)
 a[1], f(a)[2], b, c = {['alo']=assert}, 10, a[1], a[f], 6, 10, 23, f(a), 2
 a[1].alo(a[2]==10 and b==10 and c==print)
 
-a.aVeryLongName012345678901234567890123456789012345678901234567890123456789 = 10
-local function foo ()
-  return a.aVeryLongName012345678901234567890123456789012345678901234567890123456789
-end
-assert(foo() == 10 and
-a.aVeryLongName012345678901234567890123456789012345678901234567890123456789 ==
-10)
-
-
 
 -- test of large float/integer indices 
 
 -- compute maximum integer where all bits fit in a float
 local maxint = math.maxinteger
 
--- trim (if needed) to fit in a float
-while maxint ~= (maxint + 0.0) or (maxint - 1) ~= (maxint - 1.0) do
+while maxint - 1.0 == maxint - 0.0 do   -- trim (if needed) to fit in a float
   maxint = maxint // 2
 end
 
 maxintF = maxint + 0.0   -- float version
 
-assert(maxintF == maxint and math.type(maxintF) == "float" and
-       maxintF >= 2.0^14)
+assert(math.type(maxintF) == "float" and maxintF >= 2.0^14)
 
 -- floats and integers must index the same places
 a[maxintF] = 10; a[maxintF - 1.0] = 11;
@@ -473,12 +434,6 @@ do
   i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
   assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
          b[3] == 1)
-  a = {}
-  local function foo ()    -- assigining to upvalues
-    b, a.x, a = a, 10, 20
-  end
-  foo()
-  assert(a == 20 and b.x == 10)
 end
 
 -- repeat test with upvalues

testes/big.lua

@@ -1,4 +1,4 @@
--- $Id: testes/big.lua $
+-- $Id: big.lua,v 1.32 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 if _soft then
@@ -23,7 +23,7 @@ local f = assert(load(prog, nil, nil, env))
 
 f()
 assert(env.X[lim] == lim - 1 and env.X[lim + 1] == lim)
-for k in pairs(env) do env[k] = undef end
+for k in pairs(env) do env[k] = nil end
 
 -- yields during accesses larger than K (in RK)
 setmetatable(env, {
@@ -49,7 +49,7 @@ assert(not e and m:find("global 'X'"))
 -- errors in metamethods 
 getmetatable(env).__newindex = function () error("hi") end
 local e, m = xpcall(f, debug.traceback)
-assert(not e and m:find("'newindex'"))
+assert(not e and m:find("'__newindex'"))
 
 f, X = nil
 
@@ -66,7 +66,7 @@ assert(repstrings * ssize > 2.0^32)  -- it should be larger than maximum size
 
 local longs = string.rep("\0", ssize)   -- create one long string
 
--- create function to concatenate 'repstrings' copies of its argument
+-- create function to concatentate 'repstrings' copies of its argument
 local rep = assert(load(
   "local a = ...; return " .. string.rep("a", repstrings, "..")))
 

testes/bitwise.lua

@@ -1,10 +1,8 @@
--- $Id: testes/bitwise.lua $
+-- $Id: bitwise.lua,v 1.26 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print("testing bitwise operations")
 
-require "bwcoercion"
-
 local numbits = string.packsize('j') * 8
 
 assert(~0 == -1)
@@ -56,22 +54,6 @@ assert("0xffffffffffffffff" | 0 == -1)
 assert("0xfffffffffffffffe" & "-1" == -2)
 assert(" \t-0xfffffffffffffffe\n\t" & "-1" == 2)
 assert("   \n  -45  \t " >> "  -2  " == -45 * 4)
-assert("1234.0" << "5.0" == 1234 * 32)
-assert("0xffff.0" ~ "0xAAAA" == 0x5555)
-assert(~"0x0.000p4" == -1)
-
-assert(("7" .. 3) << 1 == 146)
-assert(0xffffffff >> (1 .. "9") == 0x1fff)
-assert(10 | (1 .. "9") == 27)
-
-do
-  local st, msg = pcall(function () return 4 & "a" end)
-  assert(string.find(msg, "'band'"))
-
-  local st, msg = pcall(function () return ~"a" end)
-  assert(string.find(msg, "'bnot'"))
-end
-
 
 -- out of range number
 assert(not pcall(function () return "0xffffffffffffffff.0" | 0 end))

testes/calls.lua

@@ -1,4 +1,4 @@
--- $Id: testes/calls.lua $
+-- $Id: calls.lua,v 1.60 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print("testing functions and calls")
@@ -21,6 +21,21 @@ assert(type(f) == 'function')
 assert(not pcall(type))
 
 
+do    -- test error in 'print' too...
+  local tostring = _ENV.tostring
+
+  _ENV.tostring = nil
+  local st, msg = pcall(print, 1)
+  assert(st == false and string.find(msg, "attempt to call a nil value"))
+
+  _ENV.tostring = function () return {} end
+  local st, msg = pcall(print, 1)
+  assert(st == false and string.find(msg, "must return a string"))
+  
+  _ENV.tostring = tostring
+end
+
+
 -- testing local-function recursion
 fact = false
 do
@@ -105,92 +120,18 @@ function deep (n)
   if n>0 then deep(n-1) end
 end
 deep(10)
-deep(180)
-
-
-print"testing tail calls"
+deep(200)
 
+-- testing tail call
 function deep (n) if n>0 then return deep(n-1) else return 101 end end
 assert(deep(30000) == 101)
 a = {}
 function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
 assert(a:deep(30000) == 101)
 
-do   -- tail calls x varargs
-  local function foo (x, ...) local a = {...}; return x, a[1], a[2] end
-
-  local function foo1 (x) return foo(10, x, x + 1) end
-
-  local a, b, c = foo1(-2)
-  assert(a == 10 and b == -2 and c == -1)
-
-  -- tail calls x metamethods
-  local t = setmetatable({}, {__call = foo})
-  local function foo2 (x) return t(10, x) end
-  a, b, c = foo2(100)
-  assert(a == t and b == 10 and c == 100)
-
-  a, b = (function () return foo() end)()
-  assert(a == nil and b == nil)
-
-  local X, Y, A
-  local function foo (x, y, ...) X = x; Y = y; A = {...} end
-  local function foo1 (...) return foo(...) end
-
-  local a, b, c = foo1()
-  assert(X == nil and Y == nil and #A == 0)
-
-  a, b, c = foo1(10)
-  assert(X == 10 and Y == nil and #A == 0)
-
-  a, b, c = foo1(10, 20)
-  assert(X == 10 and Y == 20 and #A == 0)
-
-  a, b, c = foo1(10, 20, 30)
-  assert(X == 10 and Y == 20 and #A == 1 and A[1] == 30)
-end
-
-
-
-do   -- tail calls x chain of __call
-  local n = 10000   -- depth
-
-  local function foo ()
-    if n == 0 then return 1023
-    else n = n - 1; return foo()
-    end
-  end
-
-  -- build a chain of __call metamethods ending in function 'foo'
-  for i = 1, 100 do
-    foo = setmetatable({}, {__call = foo})
-  end
-
-  -- call the first one as a tail call in a new coroutine
-  -- (to ensure stack is not preallocated)
-  assert(coroutine.wrap(function() return foo() end)() == 1023)
-end
-
 print('+')
 
 
-do  -- testing chains of '__call'
-  local N = 20
-  local u = table.pack
-  for i = 1, N do
-    u = setmetatable({i}, {__call = u})
-  end
-
-  local Res = u("a", "b", "c")
-
-  assert(Res.n == N + 3)
-  for i = 1, N do
-    assert(Res[i][1] == i)
-  end
-  assert(Res[N + 1] == "a" and Res[N + 2] == "b" and Res[N + 3] == "c")
-end
-
-
 a = nil
 (function (x) a=x end)(23)
 assert(a == 23 and (function (x) return x*2 end)(20) == 40)
@@ -317,16 +258,6 @@ f = load(string.dump(function () return 1 end), nil, "b", {})
 assert(type(f) == "function" and f() == 1)
 
 
-do   -- another bug (in 5.4.0)
-  -- loading a binary long string interrupted by GC cycles
-  local f = string.dump(function ()
-    return '01234567890123456789012345678901234567890123456789'
-  end)
-  f = load(read1(f))
-  assert(f() == '01234567890123456789012345678901234567890123456789')
-end
-
-
 x = string.dump(load("x = 1; return x"))
 a = assert(load(read1(x), nil, "b"))
 assert(a() == 1 and _G.x == 1)
@@ -368,12 +299,8 @@ x = [[
    end
   end
 ]]
-a = assert(load(read1(x), "read", "t"))
-assert(a()(2)(3)(10) == 15)
 
--- repeat the test loading a binary chunk
-x = string.dump(a)
-a = assert(load(read1(x), "read", "b"))
+a = assert(load(read1(x)))
 assert(a()(2)(3)(10) == 15)
 
 
@@ -436,30 +363,22 @@ assert((function (a) return a end)() == nil)
 
 print("testing binary chunks")
 do
-  local header = string.pack("c4BBc6BBB",
-    "\27Lua",                                  -- signature
-    0x54,                                      -- version 5.4 (0x54)
-    0,                                         -- format
-    "\x19\x93\r\n\x1a\n",                      -- data
-    4,                                         -- size of instruction
-    string.packsize("j"),                      -- sizeof(lua integer)
-    string.packsize("n")                       -- sizeof(lua number)
+  local header = string.pack("c4BBc6BBBBBj",
+    "\27Lua",                -- signature
+    5*16 + 3,                -- version 5.3
+    0,                       -- format
+    "\x19\x93\r\n\x1a\n",    -- data
+    string.packsize("i"),    -- sizeof(int)
+    string.packsize("T"),    -- sizeof(size_t)
+    4,                       -- size of instruction
+    string.packsize("j"),    -- sizeof(lua integer)
+    string.packsize("n"),    -- sizeof(lua number)
+    0x5678                   -- LUAC_INT
+    -- LUAC_NUM may not have a unique binary representation (padding...)
   )
-  local c = string.dump(function ()
-    local a = 1; local b = 3;
-    local f = function () return a + b + _ENV.c; end    -- upvalues
-    local s1 = "a constant"
-    local s2 = "another constant"
-    return a + b * 3
-  end)
+  local c = string.dump(function () local a = 1; local b = 3; return a+b*3 end)
 
-  assert(assert(load(c))() == 10)
-
-  -- check header
   assert(string.sub(c, 1, #header) == header)
-  -- check LUAC_INT and LUAC_NUM
-  local ci, cn = string.unpack("jn", c, #header + 1)
-  assert(ci == 0x5678 and cn == 370.5)
 
   -- corrupted header
   for i = 1, #header do
@@ -475,6 +394,7 @@ do
     local st, msg = load(string.sub(c, 1, i))
     assert(not st and string.find(msg, "truncated"))
   end
+  assert(assert(load(c))() == 10)
 end
 
 print('OK')

testes/closure.lua

@@ -1,4 +1,4 @@
--- $Id: testes/closure.lua $
+-- $Id: closure.lua,v 1.59 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print "testing closures"
@@ -44,17 +44,16 @@ assert(B.g == 19)
 
 -- testing equality
 a = {}
+for i = 1, 5 do  a[i] = function (x) return x + a + _ENV end  end
+assert(a[3] == a[4] and a[4] == a[5])
 
 for i = 1, 5 do  a[i] = function (x) return i + a + _ENV end  end
 assert(a[3] ~= a[4] and a[4] ~= a[5])
 
-do
-  local a = function (x)  return math.sin(_ENV[x])  end
-  local function f()
-    return a
-  end
-  assert(f() == f())
+local function f()
+  return function (x)  return math.sin(_ENV[x])  end
 end
+assert(f() == f())
 
 
 -- testing closures with 'for' control variable
@@ -63,7 +62,7 @@ for i=1,10 do
   a[i] = {set = function(x) i=x end, get = function () return i end}
   if i == 3 then break end
 end
-assert(a[4] == undef)
+assert(a[4] == nil)
 a[1].set(10)
 assert(a[2].get() == 2)
 a[2].set('a')
@@ -151,28 +150,6 @@ y = f(10)
 w = 1.345
 assert(y(20)(30) == 60+w)
 
-
--- testing closures x break
-do
-  local X, Y
-  local a = math.sin(0)
-
-  while a do
-    local b = 10
-    X = function () return b end   -- closure with upvalue
-    if a then break end
-  end
-  
-  do
-    local b = 20
-    Y = function () return b end   -- closure with upvalue
-  end
-
-  -- upvalues must be different
-  assert(X() == 10 and Y() == 20)
-end
-
-  
 -- testing closures x repeat-until
 
 local a = {}
@@ -242,7 +219,7 @@ end
 
 assert(debug.upvalueid(foo1, 1))
 assert(debug.upvalueid(foo1, 2))
-assert(not debug.upvalueid(foo1, 3))
+assert(not pcall(debug.upvalueid, foo1, 3))
 assert(debug.upvalueid(foo1, 1) == debug.upvalueid(foo2, 2))
 assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo2, 1))
 assert(debug.upvalueid(foo3, 1))

testes/code.lua

@@ -1,4 +1,4 @@
--- $Id: testes/code.lua $
+-- $Id: code.lua,v 1.42 2016/11/07 13:04:32 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 if T==nil then
@@ -7,23 +7,6 @@ if T==nil then
 end
 print "testing code generation and optimizations"
 
--- to test constant propagation
-local k0aux <const> = 0
-local k0 <const> = k0aux
-local k1 <const> = 1
-local k3 <const> = 3
-local k6 <const> = k3 + (k3 << k0)
-local kFF0 <const> = 0xFF0
-local k3_78 <const> = 3.78
-local x, k3_78_4 <const> = 10, k3_78 / 4
-assert(x == 10)
-
-local kx <const> = "x"
-
-local kTrue <const> = true
-local kFalse <const> = false
-
-local kNil <const> = nil
 
 -- this code gave an error for the code checker
 do
@@ -44,59 +27,33 @@ end
 
 local function foo ()
   local a
-  a = k3;
+  a = 3;
   a = 0; a = 0.0; a = -7 + 7
-  a = k3_78/4; a = k3_78_4
-  a = -k3_78/4; a = k3_78/4; a = -3.78/4
+  a = 3.78/4; a = 3.78/4
+  a = -3.78/4; a = 3.78/4; a = -3.78/4
   a = -3.79/4; a = 0.0; a = -0;
-  a = k3; a = 3.0; a = 3; a = 3.0
+  a = 3; a = 3.0; a = 3; a = 3.0
 end
 
-checkKlist(foo, {3.78/4, -3.78/4, -3.79/4})
-
-
-foo = function (f, a)
-        f(100 * 1000)
-        f(100.0 * 1000)
-        f(-100 * 1000)
-        f(-100 * 1000.0)
-        f(100000)
-        f(100000.0)
-        f(-100000)
-        f(-100000.0)
-      end
-
-checkKlist(foo, {100000, 100000.0, -100000, -100000.0})
+checkKlist(foo, {3, 0, 0.0, 3.78/4, -3.78/4, -3.79/4, 3.0})
 
 
 -- testing opcodes
 
--- check that 'f' opcodes match '...'
 function check (f, ...)
   local arg = {...}
   local c = T.listcode(f)
   for i=1, #arg do
-    local opcode = string.match(c[i], "%u%w+")
-    -- print(arg[i], opcode)
-    assert(arg[i] == opcode)
+    -- print(arg[i], c[i])
+    assert(string.find(c[i], '- '..arg[i]..' *%d'))
   end
-  assert(c[#arg+2] == undef)
+  assert(c[#arg+2] == nil)
 end
 
 
--- check that 'f' opcodes match '...' and that 'f(p) == r'.
-function checkR (f, p, r, ...)
-  local r1 = f(p)
-  assert(r == r1 and math.type(r) == math.type(r1))
-  check(f, ...)
-end
-
-
--- check that 'a' and 'b' has the same opcodes
 function checkequal (a, b)
   a = T.listcode(a)
   b = T.listcode(b)
-  assert(#a == #b)
   for i = 1, #a do
     a[i] = string.gsub(a[i], '%b()', '')   -- remove line number
     b[i] = string.gsub(b[i], '%b()', '')   -- remove line number
@@ -106,30 +63,23 @@ end
 
 
 -- some basic instructions
-check(function ()   -- function does not create upvalues
+check(function ()
   (function () end){f()}
-end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
-     'SETLIST', 'CALL', 'RETURN0')
-
-check(function (x)   -- function creates upvalues
-  (function () return x end){f()}
-end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
-     'SETLIST', 'CALL', 'RETURN')
+end, 'CLOSURE', 'NEWTABLE', 'GETTABUP', 'CALL', 'SETLIST', 'CALL', 'RETURN')
 
 
 -- sequence of LOADNILs
 check(function ()
-  local kNil <const> = nil
   local a,b,c
   local d; local e;
   local f,g,h;
-  d = nil; d=nil; b=nil; a=kNil; c=nil;
-end, 'LOADNIL', 'RETURN0')
+  d = nil; d=nil; b=nil; a=nil; c=nil;
+end, 'LOADNIL', 'RETURN')
 
 check(function ()
   local a,b,c,d = 1,1,1,1
   d=nil;c=nil;b=nil;a=nil
-end, 'LOADI', 'LOADI', 'LOADI', 'LOADI', 'LOADNIL', 'RETURN0')
+end, 'LOADK', 'LOADK', 'LOADK', 'LOADK', 'LOADNIL', 'RETURN')
 
 do
   local a,b,c,d = 1,1,1,1
@@ -139,225 +89,97 @@ end
 
 
 -- single return
-check (function (a,b,c) return a end, 'RETURN1')
+check (function (a,b,c) return a end, 'RETURN')
 
 
 -- infinite loops
-check(function () while kTrue do local a = -1 end end,
-'LOADI', 'JMP', 'RETURN0')
+check(function () while true do local a = -1 end end,
+'LOADK', 'JMP', 'RETURN')
 
 check(function () while 1 do local a = -1 end end,
-'LOADI', 'JMP', 'RETURN0')
+'LOADK', 'JMP', 'RETURN')
 
 check(function () repeat local x = 1 until true end,
-'LOADI', 'RETURN0')
+'LOADK', 'RETURN')
 
 
 -- concat optimization
 check(function (a,b,c,d) return a..b..c..d end,
-  'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN1')
+  'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN')
 
 -- not
-check(function () return not not nil end, 'LOADFALSE', 'RETURN1')
-check(function () return not not kFalse end, 'LOADFALSE', 'RETURN1')
-check(function () return not not true end, 'LOADTRUE', 'RETURN1')
-check(function () return not not k3 end, 'LOADTRUE', 'RETURN1')
+check(function () return not not nil end, 'LOADBOOL', 'RETURN')
+check(function () return not not false end, 'LOADBOOL', 'RETURN')
+check(function () return not not true end, 'LOADBOOL', 'RETURN')
+check(function () return not not 1 end, 'LOADBOOL', 'RETURN')
 
 -- direct access to locals
 check(function ()
   local a,b,c,d
-  a = b*a
-  c.x, a[b] = -((a + d/b - a[b]) ^ a.x), b
+  a = b*2
+  c[2], a[b] = -((a + d/2 - a[b]) ^ a.x), b
 end,
   'LOADNIL',
-  'MUL', 'MMBIN',
-  'DIV', 'MMBIN', 'ADD', 'MMBIN', 'GETTABLE', 'SUB', 'MMBIN',
-  'GETFIELD', 'POW', 'MMBIN', 'UNM', 'SETTABLE', 'SETFIELD', 'RETURN0')
+  'MUL',
+  'DIV', 'ADD', 'GETTABLE', 'SUB', 'GETTABLE', 'POW',
+    'UNM', 'SETTABLE', 'SETTABLE', 'RETURN')
 
 
 -- direct access to constants
 check(function ()
   local a,b
-  local c = kNil
-  a[kx] = 3.2
+  a.x = 3.2
   a.x = b
   a[b] = 'x'
 end,
-  'LOADNIL', 'SETFIELD', 'SETFIELD', 'SETTABLE', 'RETURN0')
-
--- "get/set table" with numeric indices
-check(function (a)
-  local k255 <const> = 255
-  a[1] = a[100]
-  a[k255] = a[256]
-  a[256] = 5
-end,
-  'GETI', 'SETI',
-  'LOADI', 'GETTABLE', 'SETI',
-  'LOADI', 'SETTABLE',  'RETURN0')
+  'LOADNIL', 'SETTABLE', 'SETTABLE', 'SETTABLE', 'RETURN')
 
 check(function ()
   local a,b
-  a = a - a
-  b = a/a
+  a = 1 - a
+  b = 1/a
   b = 5-4
 end,
-  'LOADNIL', 'SUB', 'MMBIN', 'DIV', 'MMBIN', 'LOADI', 'RETURN0')
+  'LOADNIL', 'SUB', 'DIV', 'LOADK', 'RETURN')
 
 check(function ()
   local a,b
-  a[kTrue] = false
+  a[true] = false
 end,
-  'LOADNIL', 'LOADTRUE', 'SETTABLE', 'RETURN0')
-
-
--- equalities
-checkR(function (a) if a == 1 then return 2 end end, 1, 2,
-  'EQI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if -4.0 == a then return 2 end end, -4, 2,
-  'EQI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if a == "hi" then return 2 end end, 10, nil,
-  'EQK', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if a == 10000 then return 2 end end, 1, nil,
-  'EQK', 'JMP', 'LOADI', 'RETURN1')   -- number too large
-
-checkR(function (a) if -10000 == a then return 2 end end, -10000, 2,
-  'EQK', 'JMP', 'LOADI', 'RETURN1')   -- number too large
-
--- comparisons
-
-checkR(function (a) if -10 <= a then return 2 end end, -10, 2,
-  'GEI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if 128.0 > a then return 2 end end, 129, nil,
-  'LTI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if -127.0 < a then return 2 end end, -127, nil,
-  'GTI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if 10 < a then return 2 end end, 11, 2,
-  'GTI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if 129 < a then return 2 end end, 130, 2,
-  'LOADI', 'LT', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if a >= 23.0 then return 2 end end, 25, 2,
-  'GEI', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if a >= 23.1 then return 2 end end, 0, nil,
-  'LOADK', 'LE', 'JMP', 'LOADI', 'RETURN1')
-
-checkR(function (a) if a > 2300.0 then return 2 end end, 0, nil,
-  'LOADF', 'LT', 'JMP', 'LOADI', 'RETURN1')
+  'LOADNIL', 'SETTABLE', 'RETURN')
 
 
 -- constant folding
 local function checkK (func, val)
-  check(func, 'LOADK', 'RETURN1')
-  checkKlist(func, {val})
+  check(func, 'LOADK', 'RETURN')
+  local k = T.listk(func)
+  assert(#k == 1 and k[1] == val and math.type(k[1]) == math.type(val))
   assert(func() == val)
 end
-
-local function checkI (func, val)
-  check(func, 'LOADI', 'RETURN1')
-  checkKlist(func, {})
-  assert(func() == val)
-end
-
-local function checkF (func, val)
-  check(func, 'LOADF', 'RETURN1')
-  checkKlist(func, {})
-  assert(func() == val)
-end
-
-checkF(function () return 0.0 end, 0.0)
-checkI(function () return k0 end, 0)
-checkI(function () return -k0//1 end, 0)
+checkK(function () return 0.0 end, 0.0)
+checkK(function () return 0 end, 0)
+checkK(function () return -0//1 end, 0)
 checkK(function () return 3^-1 end, 1/3)
 checkK(function () return (1 + 1)^(50 + 50) end, 2^100)
 checkK(function () return (-2)^(31 - 2) end, -0x20000000 + 0.0)
-checkF(function () return (-k3^0 + 5) // 3.0 end, 1.0)
-checkI(function () return -k3 % 5 end, 2)
-checkF(function () return -((2.0^8 + -(-1)) % 8)/2 * 4 - 3 end, -5.0)
-checkF(function () return -((2^8 + -(-1)) % 8)//2 * 4 - 3 end, -7.0)
-checkI(function () return 0xF0.0 | 0xCC.0 ~ 0xAA & 0xFD end, 0xF4)
-checkI(function () return ~(~kFF0 | kFF0) end, 0)
-checkI(function () return ~~-1024.0 end, -1024)
-checkI(function () return ((100 << k6) << -4) >> 2 end, 100)
-
--- borders around MAXARG_sBx ((((1 << 17) - 1) >> 1) == 65535)
-local a = 17; local sbx = ((1 << a) - 1) >> 1   -- avoid folding
-local border <const> = 65535
-checkI(function () return border end, sbx)
-checkI(function () return -border end, -sbx)
-checkI(function () return border + 1 end, sbx + 1)
-checkK(function () return border + 2 end, sbx + 2)
-checkK(function () return -(border + 1) end, -(sbx + 1))
-
-local border <const> = 65535.0
-checkF(function () return border end, sbx + 0.0)
-checkF(function () return -border end, -sbx + 0.0)
-checkF(function () return border + 1 end, (sbx + 1.0))
-checkK(function () return border + 2 end, (sbx + 2.0))
-checkK(function () return -(border + 1) end, -(sbx + 1.0))
+checkK(function () return (-3^0 + 5) // 3.0 end, 1.0)
+checkK(function () return -3 % 5 end, 2)
+checkK(function () return -((2.0^8 + -(-1)) % 8)/2 * 4 - 3 end, -5.0)
+checkK(function () return -((2^8 + -(-1)) % 8)//2 * 4 - 3 end, -7.0)
+checkK(function () return 0xF0.0 | 0xCC.0 ~ 0xAA & 0xFD end, 0xF4)
+checkK(function () return ~(~0xFF0 | 0xFF0) end, 0)
+checkK(function () return ~~-100024.0 end, -100024)
+checkK(function () return ((100 << 6) << -4) >> 2 end, 100)
 
 
--- immediate operands
-checkR(function (x) return x + k1 end, 10, 11, 'ADDI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x - 127 end, 10, -117, 'ADDI', 'MMBINI', 'RETURN1')
-checkR(function (x) return 128 + x end, 0.0, 128.0,
-         'ADDI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x * -127 end, -1.0, 127.0,
-         'MULK', 'MMBINK', 'RETURN1')
-checkR(function (x) return 20 * x end, 2, 40, 'MULK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x ^ -2 end, 2, 0.25, 'POWK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x / 40 end, 40, 1.0, 'DIVK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x // 1 end, 10.0, 10.0,
-         'IDIVK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x % (100 - 10) end, 91, 1,
-         'MODK', 'MMBINK', 'RETURN1')
-checkR(function (x) return k1 << x end, 3, 8, 'SHLI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x << 127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x << -127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x >> 128 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x >> -127 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
-checkR(function (x) return x & 1 end, 9, 1, 'BANDK', 'MMBINK', 'RETURN1')
-checkR(function (x) return 10 | x end, 1, 11, 'BORK', 'MMBINK', 'RETURN1')
-checkR(function (x) return -10 ~ x end, -1, 9, 'BXORK', 'MMBINK', 'RETURN1')
-
--- K operands in arithmetic operations
-checkR(function (x) return x + 0.0 end, 1, 1.0, 'ADDK', 'MMBINK', 'RETURN1')
---  check(function (x) return 128 + x end, 'ADDK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x * -10000 end, 2, -20000,
-         'MULK', 'MMBINK', 'RETURN1')
---  check(function (x) return 20 * x end, 'MULK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x ^ 0.5 end, 4, 2.0, 'POWK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x / 2.0 end, 4, 2.0, 'DIVK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x // 10000 end, 10000, 1,
-         'IDIVK', 'MMBINK', 'RETURN1')
-checkR(function (x) return x % (100.0 - 10) end, 91, 1.0,
-         'MODK', 'MMBINK', 'RETURN1')
-
--- no foldings (and immediate operands)
-check(function () return -0.0 end, 'LOADF', 'UNM', 'RETURN1')
-check(function () return k3/0 end, 'LOADI', 'DIVK', 'MMBINK', 'RETURN1')
-check(function () return 0%0 end, 'LOADI', 'MODK', 'MMBINK', 'RETURN1')
-check(function () return -4//0 end, 'LOADI', 'IDIVK', 'MMBINK', 'RETURN1')
-check(function (x) return x >> 2.0 end, 'LOADF', 'SHR', 'MMBIN', 'RETURN1')
-check(function (x) return x << 128 end, 'LOADI', 'SHL', 'MMBIN', 'RETURN1')
-check(function (x) return x & 2.0 end, 'LOADF', 'BAND', 'MMBIN', 'RETURN1')
-
--- basic 'for' loops
-check(function () for i = -10, 10.5 do end end,
-'LOADI', 'LOADK', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
-check(function () for i = 0xfffffff, 10.0, 1 do end end,
-'LOADK', 'LOADF', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
+-- no foldings
+check(function () return -0.0 end, 'LOADK', 'UNM', 'RETURN')
+check(function () return 3/0 end, 'DIV', 'RETURN')
+check(function () return 0%0 end, 'MOD', 'RETURN')
+check(function () return -4//0 end, 'IDIV', 'RETURN')
 
 -- bug in constant folding for 5.1
-check(function () return -nil end, 'LOADNIL', 'UNM', 'RETURN1')
+check(function () return -nil end, 'LOADNIL', 'UNM', 'RETURN')
 
 
 check(function ()
@@ -366,29 +188,21 @@ check(function ()
   b[a], a = c, b
   a, b = c, a
   a = a
-end,
+end, 
   'LOADNIL',
   'MOVE', 'MOVE', 'SETTABLE',
   'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
   'MOVE', 'MOVE', 'MOVE',
   -- no code for a = a
-  'RETURN0')
+  'RETURN')
 
 
 -- x == nil , x ~= nil
--- checkequal(function (b) if (a==nil) then a=1 end; if a~=nil then a=1 end end,
---            function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
+checkequal(function () if (a==nil) then a=1 end; if a~=nil then a=1 end end,
+           function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
 
--- check(function () if a==nil then a='a' end end,
--- 'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
-
-do   -- tests for table access in upvalues
-  local t
-  check(function () t[kx] = t.y end, 'GETTABUP', 'SETTABUP')
-  check(function (a) t[a()] = t[a()] end,
-  'MOVE', 'CALL', 'GETUPVAL', 'MOVE', 'CALL',
-  'GETUPVAL', 'GETTABLE', 'SETTABLE')
-end
+check(function () if a==nil then a='a' end end,
+'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
 
 -- de morgan
 checkequal(function () local a; if not (a or b) then b=a end end,
@@ -398,38 +212,28 @@ checkequal(function (l) local a; return 0 <= a and a <= l end,
            function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
 
 
--- if-break optimizations
-check(function (a, b)
-        while a do
-          if b then break else a = a + 1 end
+-- if-goto optimizations
+check(function (a, b, c, d, e)
+        if a == b then goto l1
+        elseif a == c then goto l2
+        elseif a == d then goto l2
+        else if a == e then goto l3
+             else goto l3
+             end
         end
-      end,
-'TEST', 'JMP', 'TEST', 'JMP', 'ADDI', 'MMBINI', 'JMP', 'RETURN0')
+        ::l1:: ::l2:: ::l3:: ::l4:: 
+end, 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'EQ', 'JMP', 'JMP', 'RETURN')
 
-checkequal(function () return 6 or true or nil end,
-           function () return k6 or kTrue or kNil end)
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) ::L2:: if not(a < 10) then goto L1 end; a = a + 1;
+                goto L2; ::L1:: end
+)
 
-checkequal(function () return 6 and true or nil end,
-           function () return k6 and kTrue or kNil end)
-
-
-do   -- string constants
-  local k0 <const> = "00000000000000000000000000000000000000000000000000"
-  local function f1 ()
-    local k <const> = k0
-    return function ()
-             return function () return k end
-           end
-  end
-
-  local f2 = f1()
-  local f3 = f2()
-  assert(f3() == k0)
-  checkK(f3, k0)
-  -- string is not needed by other functions
-  assert(T.listk(f1)[1] == nil)
-  assert(T.listk(f2)[1] == nil)
-end
+checkequal(
+function (a) while a < 10 do a = a + 1 end end,
+function (a) while true do if not(a < 10) then break end; a = a + 1; end end
+)
 
 print 'OK'
 

testes/constructs.lua

@@ -1,4 +1,4 @@
--- $Id: testes/constructs.lua $
+-- $Id: constructs.lua,v 1.41 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 ;;print "testing syntax";;
@@ -32,6 +32,10 @@ assert(-3%5 == 2 and -3+5 == 2)
 assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
 assert(not(2+1 > 3*1) and "a".."b" > "a");
 
+assert("7" .. 3 << 1 == 146)
+assert(10 >> 1 .. "9" == 0)
+assert(10 | 1 .. "9" == 27)
+
 assert(0xF0 | 0xCC ~ 0xAA & 0xFD == 0xF4)
 assert(0xFD & 0xAA ~ 0xCC | 0xF0 == 0xF4)
 assert(0xF0 & 0x0F + 1 == 0x10)
@@ -59,41 +63,6 @@ assert((x>y) and x or y == 2);
 
 assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
 
-do   -- testing operators with diffent kinds of constants
-  -- operands to consider:
-  --  * fit in register
-  --  * constant doesn't fit in register
-  --  * floats with integral values
-  local operand = {3, 100, 5.0, -10, -5.0, 10000, -10000}
-  local operator = {"+", "-", "*", "/", "//", "%", "^",
-                    "&", "|", "^", "<<", ">>",
-                    "==", "~=", "<", ">", "<=", ">=",}
-  for _, op in ipairs(operator) do
-    local f = assert(load(string.format([[return function (x,y)
-                return x %s y
-              end]], op)))();
-    for _, o1 in ipairs(operand) do
-      for _, o2 in ipairs(operand) do
-        local gab = f(o1, o2)
-
-        _ENV.XX = o1
-        code = string.format("return XX %s %s", op, o2)
-        res = assert(load(code))()
-        assert(res == gab)
-
-        _ENV.XX = o2
-        local code = string.format("return (%s) %s XX", o1, op)
-        local res = assert(load(code))()
-        assert(res == gab)
-
-        code = string.format("return (%s) %s %s", o1, op, o2)
-        res = assert(load(code))()
-        assert(res == gab)
-      end
-    end
-  end
-end
-
 
 -- silly loops
 repeat until 1; repeat until true;
@@ -210,28 +179,6 @@ assert(a==1 and b==nil)
 
 print'+';
 
-do   -- testing constants
-  local prog <const> = [[local x <XXX> = 10]]
-  checkload(prog, "unknown attribute 'XXX'")
-
-  checkload([[local xxx <const> = 20; xxx = 10]],
-             ":1: attempt to assign to const variable 'xxx'")
-
-  checkload([[
-    local xx;
-    local xxx <const> = 20;
-    local yyy;
-    local function foo ()
-      local abc = xx + yyy + xxx;
-      return function () return function () xxx = yyy end end
-    end
-  ]], ":6: attempt to assign to const variable 'xxx'")
-
-  checkload([[
-    local x <close> = nil
-    x = io.open()
-  ]], ":2: attempt to assign to const variable 'x'")
-end
 
 f = [[
 return function ( a , b , c , d , e )
@@ -287,7 +234,7 @@ a,b = F(nil)==nil; assert(a == true and b == nil)
 ------------------------------------------------------------------
 
 -- sometimes will be 0, sometimes will not...
-_ENV.GLOB1 = math.random(0, 1)
+_ENV.GLOB1 = math.floor(os.time()) % 2
 
 -- basic expressions with their respective values
 local basiccases = {
@@ -298,36 +245,16 @@ local basiccases = {
   {"(0==_ENV.GLOB1)", 0 == _ENV.GLOB1},
 }
 
-local prog
-
-if _ENV.GLOB1 == 0 then
-  basiccases[2][1] = "F"   -- constant false
-
-  prog = [[
-    local F <const> = false
-    if %s then IX = true end
-    return %s
-]]
-else
-  basiccases[4][1] = "k10"   -- constant 10
-
-  prog = [[
-    local k10 <const> = 10
-    if %s then IX = true end
-    return %s
-  ]]
-end
-
 print('testing short-circuit optimizations (' .. _ENV.GLOB1 .. ')')
 
 
 -- operators with their respective values
-local binops <const> = {
+local binops = {
   {" and ", function (a,b) if not a then return a else return b end end},
   {" or ", function (a,b) if a then return a else return b end end},
 }
 
-local cases <const> = {}
+local cases = {}
 
 -- creates all combinations of '(cases[i] op cases[n-i])' plus
 -- 'not(cases[i] op cases[n-i])' (syntax + value)
@@ -357,6 +284,8 @@ cases[1] = basiccases
 for i = 2, level do cases[i] = createcases(i) end
 print("+")
 
+local prog = [[if %s then IX = true end; return %s]]
+
 local i = 0
 for n = 1, level do
   for _, v in pairs(cases[n]) do
@@ -374,4 +303,11 @@ end
 checkload("for x do", "expected")
 checkload("x:call", "expected")
 
+if not _soft then
+  -- control structure too long
+  local s = string.rep("a = a + 1\n", 2^18)
+  s = "while true do " .. s .. "end"
+  checkload(s, "too long")
+end
+
 print'OK'

testes/coroutine.lua

@@ -1,4 +1,4 @@
--- $Id: testes/coroutine.lua $
+-- $Id: coroutine.lua,v 1.42 2016/11/07 13:03:20 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print "testing coroutines"
@@ -10,7 +10,7 @@ local f
 local main, ismain = coroutine.running()
 assert(type(main) == "thread" and ismain)
 assert(not coroutine.resume(main))
-assert(not coroutine.isyieldable(main) and not coroutine.isyieldable())
+assert(not coroutine.isyieldable())
 assert(not pcall(coroutine.yield))
 
 
@@ -38,7 +38,7 @@ function foo (a, ...)
   assert(coroutine.resume(f) == false)
   assert(coroutine.status(f) == "running")
   local arg = {...}
-  assert(coroutine.isyieldable(x))
+  assert(coroutine.isyieldable())
   for i=1,#arg do
     _G.x = {coroutine.yield(table.unpack(arg[i]))}
   end
@@ -46,17 +46,14 @@ function foo (a, ...)
 end
 
 f = coroutine.create(foo)
-assert(coroutine.isyieldable(f))
 assert(type(f) == "thread" and coroutine.status(f) == "suspended")
 assert(string.find(tostring(f), "thread"))
 local s,a,b,c,d
 s,a,b,c,d = coroutine.resume(f, {1,2,3}, {}, {1}, {'a', 'b', 'c'})
-assert(coroutine.isyieldable(f))
 assert(s and a == nil and coroutine.status(f) == "suspended")
 s,a,b,c,d = coroutine.resume(f)
 eqtab(_G.x, {})
 assert(s and a == 1 and b == nil)
-assert(coroutine.isyieldable(f))
 s,a,b,c,d = coroutine.resume(f, 1, 2, 3)
 eqtab(_G.x, {1, 2, 3})
 assert(s and a == 'a' and b == 'b' and c == 'c' and d == nil)
@@ -110,7 +107,7 @@ function filter (p, g)
   end)
 end
 
-local x = gen(80)
+local x = gen(100)
 local a = {}
 while 1 do
   local n = x()
@@ -119,134 +116,9 @@ while 1 do
   x = filter(n, x)
 end
 
-assert(#a == 22 and a[#a] == 79)
+assert(#a == 25 and a[#a] == 97)
 x, a = nil
 
-
-print("to-be-closed variables in coroutines")
-
-local function func2close (f)
-  return setmetatable({}, {__close = f})
-end
-
-do
-  -- ok to close a dead coroutine
-  local co = coroutine.create(print)
-  assert(coroutine.resume(co, "testing 'coroutine.close'"))
-  assert(coroutine.status(co) == "dead")
-  local st, msg = coroutine.close(co)
-  assert(st and msg == nil)
-
-  -- cannot close the running coroutine
-  local st, msg = pcall(coroutine.close, coroutine.running())
-  assert(not st and string.find(msg, "running"))
-
-  local main = coroutine.running()
-
-  -- cannot close a "normal" coroutine
-  ;(coroutine.wrap(function ()
-    local st, msg = pcall(coroutine.close, main)
-    assert(not st and string.find(msg, "normal"))
-  end))()
-
-  -- to-be-closed variables in coroutines
-  local X
-
-  -- closing a coroutine after an error
-  local co = coroutine.create(error)
-  local st, msg = coroutine.resume(co, 100)
-  assert(not st and msg == 100)
-  st, msg = coroutine.close(co)
-  assert(not st and msg == 100)
-
-  co = coroutine.create(function ()
-    local x <close> = func2close(function (self, err)
-      assert(err == nil); X = false
-    end)
-    X = true
-    coroutine.yield()
-  end)
-  coroutine.resume(co)
-  assert(X)
-  assert(coroutine.close(co))
-  assert(not X and coroutine.status(co) == "dead")
-
-  -- error closing a coroutine
-  local x = 0
-  co = coroutine.create(function()
-    local y <close> = func2close(function (self,err)
-      assert(err == 111)
-      x = 200
-      error(200)
-    end)
-    local x <close> = func2close(function (self, err)
-      assert(err == nil); error(111)
-    end)
-    coroutine.yield()
-  end)
-  coroutine.resume(co)
-  assert(x == 0)
-  local st, msg = coroutine.close(co)
-  assert(st == false and coroutine.status(co) == "dead" and msg == 200)
-  assert(x == 200)
-end
-
-do
-  -- <close> versus pcall in coroutines
-  local X = false
-  local Y = false
-  function foo ()
-    local x <close> = func2close(function (self, err)
-      Y = debug.getinfo(2)
-      X = err
-    end)
-    error(43)
-  end
-  co = coroutine.create(function () return pcall(foo) end)
-  local st1, st2, err = coroutine.resume(co)
-  assert(st1 and not st2 and err == 43)
-  assert(X == 43 and Y.name == "pcall")
-
-  -- recovering from errors in __close metamethods
-  local track = {}
-
-  local function h (o)
-    local hv <close> = o
-    return 1
-  end
-
-  local function foo ()
-    local x <close> = func2close(function(_,msg)
-      track[#track + 1] = msg or false
-      error(20)
-    end)
-    local y <close> = func2close(function(_,msg)
-      track[#track + 1] = msg or false
-      return 1000
-    end)
-    local z <close> = func2close(function(_,msg)
-      track[#track + 1] = msg or false
-      error(10)
-    end)
-    coroutine.yield(1)
-    h(func2close(function(_,msg)
-        track[#track + 1] = msg or false
-        error(2)
-      end))
-  end
-
-  local co = coroutine.create(pcall)
-
-  local st, res = coroutine.resume(co, foo)    -- call 'foo' protected
-  assert(st and res == 1)   -- yield 1
-  local st, res1, res2 = coroutine.resume(co)   -- continue
-  assert(coroutine.status(co) == "dead")
-  assert(st and not res1 and res2 == 20)   -- last error (20)
-  assert(track[1] == false and track[2] == 2 and track[3] == 10 and
-         track[4] == 10)
-end
-
-
 -- yielding across C boundaries
 
 co = coroutine.wrap(function()
@@ -305,26 +177,6 @@ do
 end
 
 
-
-do   -- testing single trace of coroutines
-  local X
-  local co = coroutine.create(function ()
-    coroutine.yield(10)
-    return 20;
-  end)
-  local trace = {}
-  local function dotrace (event)
-    trace[#trace + 1] = event
-  end
-  debug.sethook(co, dotrace, "clr")
-  repeat until not coroutine.resume(co)
-  local correcttrace = {"call", "line", "call", "return", "line", "return"}
-  assert(#trace == #correcttrace)
-  for k, v in pairs(trace) do
-    assert(v == correcttrace[k])
-  end
-end
-
 -- errors in coroutines
 function foo ()
   assert(debug.getinfo(1).currentline == debug.getinfo(foo).linedefined + 1)
@@ -383,7 +235,7 @@ local f = x()
 assert(f() == 21 and x()() == 32 and x() == f)
 x = nil
 collectgarbage()
-assert(C[1] == undef)
+assert(C[1] == nil)
 assert(f() == 43 and f() == 53)
 
 
@@ -417,13 +269,9 @@ do
   local st, res = coroutine.resume(B)
   assert(st == true and res == false)
 
-  local X = false
-  A = coroutine.wrap(function()
-    local _ <close> = setmetatable({}, {__close = function () X = true end})
-    return pcall(A, 1)
-  end)
+  A = coroutine.wrap(function() return pcall(A, 1) end)
   st, res = A()
-  assert(not st and string.find(res, "non%-suspended") and X == true)
+  assert(not st and string.find(res, "non%-suspended"))
 end
 
 
@@ -461,8 +309,7 @@ assert(_G.f() == 12)
 
 
 if not T then
-  (Message or print)
-      ('\n >>> testC not active: skipping coroutine API tests <<<\n')
+  (Message or print)('\n >>> testC not active: skipping yield/hook tests <<<\n')
 else
   print "testing yields inside hooks"
 
@@ -490,36 +337,10 @@ else
   while A==0 or B==0 do    -- A ~= 0 when 'x' finishes (similar for 'B','y')
     if A==0 then turn = "A"; assert(T.resume(x)) end
     if B==0 then turn = "B"; assert(T.resume(y)) end
-
-    -- check that traceback works correctly after yields inside hooks
-    debug.traceback(x)
-    debug.traceback(y)
   end
 
   assert(B // A == 7)    -- fact(7) // fact(6)
 
-  do   -- hooks vs. multiple values
-    local done
-    local function test (n)
-      done = false
-      return coroutine.wrap(function ()
-        local a = {}
-        for i = 1, n do a[i] = i end
-        -- 'pushint' just to perturb the stack
-        T.sethook("pushint 10; yield 0", "", 1)   -- yield at each op.
-        local a1 = {table.unpack(a)}   -- must keep top between ops.
-        assert(#a1 == n)
-        for i = 1, n do assert(a[i] == i) end
-        done = true
-      end)
-    end
-    -- arguments to the coroutine are just to perturb its stack
-    local co = test(0); while not done do co(30) end
-    co = test(1); while not done do co(20, 10) end
-    co = test(3); while not done do co() end
-    co = test(100); while not done do co() end
-  end
-
   local line = debug.getinfo(1, "l").currentline + 2    -- get line number
   local function foo ()
     local x = 10    --<< this line is 'line'
@@ -568,13 +389,18 @@ else
     assert(coroutine.resume(c, 1, 2, 3))   -- start coroutine
     local n,v = debug.getlocal(c, 0, 1)    -- check its local
     assert(n == "a" and v == 1)
+    n,v = debug.getlocal(c, 0, -1)         -- check varargs
+    assert(v == 2)
+    n,v = debug.getlocal(c, 0, -2)
+    assert(v == 3)
     assert(debug.setlocal(c, 0, 1, 10))     -- test 'setlocal'
+    assert(debug.setlocal(c, 0, -2, 20))
     local t = debug.getinfo(c, 0)        -- test 'getinfo'
     assert(t.currentline == t.linedefined + 1)
     assert(not debug.getinfo(c, 1))      -- no other level
     assert(coroutine.resume(c))          -- run next line
     v = {coroutine.resume(c)}         -- finish coroutine
-    assert(v[1] == true and v[2] == 2 and v[3] == 3 and v[4] == undef)
+    assert(v[1] == true and v[2] == 2 and v[3] == 20 and v[4] == nil)
     assert(not coroutine.resume(c))
   end
 
@@ -641,17 +467,8 @@ else
          c == "ERRRUN" and d == 4)
 
 
-  -- using a main thread as a coroutine  (dubious use!)
+  -- using a main thread as a coroutine
   local state = T.newstate()
-
-  -- check that yielddable is working correctly
-  assert(T.testC(state, "newthread; isyieldable -1; remove 1; return 1"))
-
-  -- main thread is not yieldable
-  assert(not T.testC(state, "rawgeti R 1; isyieldable -1; remove 1; return 1"))
-
-  T.testC(state, "settop 0")
-
   T.loadlib(state)
 
   assert(T.doremote(state, [[
@@ -723,41 +540,31 @@ print"+"
 
 print"testing yields inside metamethods"
 
-local function val(x)
-  if type(x) == "table" then return x.x else return x end
-end
-
 local mt = {
-  __eq = function(a,b) coroutine.yield(nil, "eq"); return val(a) == val(b) end,
-  __lt = function(a,b) coroutine.yield(nil, "lt"); return val(a) < val(b) end,
+  __eq = function(a,b) coroutine.yield(nil, "eq"); return a.x == b.x end,
+  __lt = function(a,b) coroutine.yield(nil, "lt"); return a.x < b.x end,
   __le = function(a,b) coroutine.yield(nil, "le"); return a - b <= 0 end,
-  __add = function(a,b) coroutine.yield(nil, "add");
-                        return val(a) + val(b) end,
-  __sub = function(a,b) coroutine.yield(nil, "sub"); return val(a) - val(b) end,
-  __mul = function(a,b) coroutine.yield(nil, "mul"); return val(a) * val(b) end,
-  __div = function(a,b) coroutine.yield(nil, "div"); return val(a) / val(b) end,
-  __idiv = function(a,b) coroutine.yield(nil, "idiv");
-                         return val(a) // val(b) end,
-  __pow = function(a,b) coroutine.yield(nil, "pow"); return val(a) ^ val(b) end,
-  __mod = function(a,b) coroutine.yield(nil, "mod"); return val(a) % val(b) end,
-  __unm = function(a,b) coroutine.yield(nil, "unm"); return -val(a) end,
-  __bnot = function(a,b) coroutine.yield(nil, "bnot"); return ~val(a) end,
-  __shl = function(a,b) coroutine.yield(nil, "shl");
-                        return val(a) << val(b) end,
-  __shr = function(a,b) coroutine.yield(nil, "shr");
-                        return val(a) >> val(b) end,
+  __add = function(a,b) coroutine.yield(nil, "add"); return a.x + b.x end,
+  __sub = function(a,b) coroutine.yield(nil, "sub"); return a.x - b.x end,
+  __mod = function(a,b) coroutine.yield(nil, "mod"); return a.x % b.x end,
+  __unm = function(a,b) coroutine.yield(nil, "unm"); return -a.x end,
+  __bnot = function(a,b) coroutine.yield(nil, "bnot"); return ~a.x end,
+  __shl = function(a,b) coroutine.yield(nil, "shl"); return a.x << b.x end,
+  __shr = function(a,b) coroutine.yield(nil, "shr"); return a.x >> b.x end,
   __band = function(a,b)
+             a = type(a) == "table" and a.x or a
+             b = type(b) == "table" and b.x or b
              coroutine.yield(nil, "band")
-             return val(a) & val(b)
+             return a & b
            end,
-  __bor = function(a,b) coroutine.yield(nil, "bor");
-                        return val(a) | val(b) end,
-  __bxor = function(a,b) coroutine.yield(nil, "bxor");
-                         return val(a) ~ val(b) end,
+  __bor = function(a,b) coroutine.yield(nil, "bor"); return a.x | b.x end,
+  __bxor = function(a,b) coroutine.yield(nil, "bxor"); return a.x ~ b.x end,
 
   __concat = function(a,b)
                coroutine.yield(nil, "concat");
-               return val(a) .. val(b)
+               a = type(a) == "table" and a.x or a
+               b = type(b) == "table" and b.x or b
+               return a .. b
              end,
   __index = function (t,k) coroutine.yield(nil, "idx"); return t.k[k] end,
   __newindex = function (t,k,v) coroutine.yield(nil, "nidx"); t.k[k] = v end,
@@ -778,7 +585,7 @@ local function run (f, t)
   local c = coroutine.wrap(f)
   while true do
     local res, stat = c()
-    if res then assert(t[i] == undef); return res, t end
+    if res then assert(t[i] == nil); return res, t end
     assert(stat == t[i])
     i = i + 1
   end
@@ -787,41 +594,15 @@ end
 
 assert(run(function () if (a>=b) then return '>=' else return '<' end end,
        {"le", "sub"}) == "<")
+-- '<=' using '<'
+mt.__le = nil
 assert(run(function () if (a<=b) then return '<=' else return '>' end end,
-       {"le", "sub"}) == "<=")
+       {"lt"}) == "<=")
 assert(run(function () if (a==b) then return '==' else return '~=' end end,
        {"eq"}) == "~=")
 
 assert(run(function () return a & b + a end, {"add", "band"}) == 2)
 
-assert(run(function () return 1 + a end, {"add"}) == 11)
-assert(run(function () return a - 25 end, {"sub"}) == -15)
-assert(run(function () return 2 * a end, {"mul"}) == 20)
-assert(run(function () return a ^ 2 end, {"pow"}) == 100)
-assert(run(function () return a / 2 end, {"div"}) == 5)
-assert(run(function () return a % 6 end, {"mod"}) == 4)
-assert(run(function () return a // 3 end, {"idiv"}) == 3)
-
-assert(run(function () return a + b end, {"add"}) == 22)
-assert(run(function () return a - b end, {"sub"}) == -2)
-assert(run(function () return a * b end, {"mul"}) == 120)
-assert(run(function () return a ^ b end, {"pow"}) == 10^12)
-assert(run(function () return a / b end, {"div"}) == 10/12)
-assert(run(function () return a % b end, {"mod"}) == 10)
-assert(run(function () return a // b end, {"idiv"}) == 0)
-
--- repeat tests with larger constants (to use 'K' opcodes)
-local a1000 = new(1000)
-
-assert(run(function () return a1000 + 1000 end, {"add"}) == 2000)
-assert(run(function () return a1000 - 25000 end, {"sub"}) == -24000)
-assert(run(function () return 2000 * a end, {"mul"}) == 20000)
-assert(run(function () return a1000 / 1000 end, {"div"}) == 1)
-assert(run(function () return a1000 % 600 end, {"mod"}) == 400)
-assert(run(function () return a1000 // 500 end, {"idiv"}) == 2)
-
-
-
 assert(run(function () return a % b end, {"mod"}) == 10)
 
 assert(run(function () return ~a & b end, {"bnot", "band"}) == ~10 & 12)
@@ -830,16 +611,6 @@ assert(run(function () return a ~ b end, {"bxor"}) == 10 ~ 12)
 assert(run(function () return a << b end, {"shl"}) == 10 << 12)
 assert(run(function () return a >> b end, {"shr"}) == 10 >> 12)
 
-assert(run(function () return 10 & b end, {"band"}) == 10 & 12)
-assert(run(function () return a | 2 end, {"bor"}) == 10 | 2)
-assert(run(function () return a ~ 2 end, {"bxor"}) == 10 ~ 2)
-assert(run(function () return a >> 2 end, {"shr"}) == 10 >> 2)
-assert(run(function () return 1 >> a end, {"shr"}) == 1 >> 10)
-assert(run(function () return a << 2 end, {"shl"}) == 10 << 2)
-assert(run(function () return 1 << a end, {"shl"}) == 1 << 10)
-assert(run(function () return 2 ~ a end, {"bxor"}) == 2 ~ 10)
-
-
 assert(run(function () return a..b end, {"concat"}) == "1012")
 
 assert(run(function() return a .. b .. c .. a end,
@@ -849,18 +620,20 @@ assert(run(function() return "a" .. "b" .. a .. "c" .. c .. b .. "x" end,
        {"concat", "concat", "concat"}) == "ab10chello12x")
 
 
-do   -- a few more tests for comparison operators
+do   -- a few more tests for comparsion operators
   local mt1 = {
     __le = function (a,b)
       coroutine.yield(10)
-      return (val(a) <= val(b))
+      return
+        (type(a) == "table" and a.x or a) <= (type(b) == "table" and b.x or b)
     end,
     __lt = function (a,b)
       coroutine.yield(10)
-      return val(a) < val(b)
+      return
+        (type(a) == "table" and a.x or a) < (type(b) == "table" and b.x or b)
     end,
   }
-  local mt2 = { __lt = mt1.__lt, __le = mt1.__le }
+  local mt2 = { __lt = mt1.__lt }   -- no __le
 
   local function run (f)
     local co = coroutine.wrap(f)
@@ -921,7 +694,7 @@ assert(run(function ()
 -- tests for coroutine API
 if T==nil then
   (Message or print)('\n >>> testC not active: skipping coroutine API tests <<<\n')
-  print "OK"; return
+  return
 end
 
 print('testing coroutine API')
@@ -1069,9 +842,9 @@ co = coroutine.wrap(function (...) return
 end)
 
 local a = {co(3,4,6)}
-assert(a[1] == 6 and a[2] == undef)
-a = {co()}; assert(a[1] == undef and _G.status == "YIELD" and _G.ctx == 2)
-a = {co()}; assert(a[1] == undef and _G.status == "YIELD" and _G.ctx == 3)
+assert(a[1] == 6 and a[2] == nil)
+a = {co()}; assert(a[1] == nil and _G.status == "YIELD" and _G.ctx == 2)
+a = {co()}; assert(a[1] == nil and _G.status == "YIELD" and _G.ctx == 3)
 a = {co(7,8)};
 -- original arguments
 assert(type(a[1]) == 'string' and type(a[2]) == 'string' and

testes/cstack.lua

@@ -1,157 +0,0 @@
--- $Id: testes/cstack.lua $
--- See Copyright Notice in file all.lua
-
-
-local tracegc = require"tracegc"
-
-print"testing stack overflow detection"
-
--- Segmentation faults in these tests probably result from a C-stack
--- overflow. To avoid these errors, you should set a smaller limit for
--- the use of C stack by Lua, by changing the constant 'LUAI_MAXCCALLS'.
--- Alternatively, you can ensure a larger stack for the program.
-
-
-local function checkerror (msg, f, ...)
-  local s, err = pcall(f, ...)
-  assert(not s and string.find(err, msg))
-end
-
-do  print("testing stack overflow in message handling")
-  local count = 0
-  local function loop (x, y, z)
-    count = count + 1
-    return 1 + loop(x, y, z)
-  end
-  tracegc.stop()    -- __gc should not be called with a full stack
-  local res, msg = xpcall(loop, loop)
-  tracegc.start()
-  assert(msg == "error in error handling")
-  print("final count: ", count)
-end
-
-
--- bug since 2.5 (C-stack overflow in recursion inside pattern matching)
-do  print("testing recursion inside pattern matching")
-  local function f (size)
-    local s = string.rep("a", size)
-    local p = string.rep(".?", size)
-    return string.match(s, p)
-  end
-  local m = f(80)
-  assert(#m == 80)
-  checkerror("too complex", f, 2000)
-end
-
-
-do  print("testing stack-overflow in recursive 'gsub'")
-  local count = 0
-  local function foo ()
-    count = count + 1
-    string.gsub("a", ".", foo)
-  end
-  checkerror("stack overflow", foo)
-  print("final count: ", count)
-
-  print("testing stack-overflow in recursive 'gsub' with metatables")
-  local count = 0
-  local t = setmetatable({}, {__index = foo})
-  foo = function ()
-    count = count + 1
-    string.gsub("a", ".", t)
-  end
-  checkerror("stack overflow", foo)
-  print("final count: ", count)
-end
-
-
-do   -- bug in 5.4.0
-  print("testing limits in coroutines inside deep calls")
-  local count = 0
-  local lim = 1000
-  local function stack (n)
-    if n > 0 then return stack(n - 1) + 1
-    else coroutine.wrap(function ()
-           count = count + 1
-           stack(lim)
-         end)()
-    end
-  end
-
-  local st, msg = xpcall(stack, function () return "ok" end, lim)
-  assert(not st and msg == "ok")
-  print("final count: ", count)
-end
-
-
-do
-  print("nesting of resuming yielded coroutines")
-  local count = 0
-
-  local function body ()
-    coroutine.yield()
-    local f = coroutine.wrap(body)
-    f();  -- start new coroutine (will stop in previous yield)
-    count = count + 1
-    f()   -- call it recursively
-  end
-
-  local f = coroutine.wrap(body)
-  f()
-  assert(not pcall(f))
-  print("final count: ", count)
-end
-
-
-if T then
-  print("testing stack recovery")
-  local N = 0      -- trace number of calls
-  local LIM = -1   -- will store N just before stack overflow
-
-  -- trace stack size; after stack overflow, it should be
-  -- the maximum allowed stack size.
-  local stack1
-  local dummy
-
-  local function err(msg)
-    assert(string.find(msg, "stack overflow"))
-    local _, stacknow = T.stacklevel()
-    assert(stacknow == stack1 + 200)
-  end
-
-  -- When LIM==-1, the 'if' is not executed, so this function only
-  -- counts and stores the stack limits up to overflow.  Then, LIM
-  -- becomes N, and then the 'if' code is run when the stack is
-  -- full. Then, there is a stack overflow inside 'xpcall', after which
-  -- the stack must have been restored back to its maximum normal size.
-  local function f()
-    dummy, stack1 = T.stacklevel()
-    if N == LIM then
-      xpcall(f, err)
-      local _, stacknow = T.stacklevel()
-      assert(stacknow == stack1)
-      return
-    end
-    N = N + 1
-    f()
-  end
-
-  local topB, sizeB   -- top and size Before overflow
-  local topA, sizeA   -- top and size After overflow
-  topB, sizeB = T.stacklevel()
-  tracegc.stop()    -- __gc should not be called with a full stack
-  xpcall(f, err)
-  tracegc.start()
-  topA, sizeA = T.stacklevel()
-  -- sizes should be comparable
-  assert(topA == topB and sizeA < sizeB * 2)
-  print(string.format("maximum stack size: %d", stack1))
-  LIM = N      -- will stop recursion at maximum level
-  N = 0        -- to count again
-  tracegc.stop()    -- __gc should not be called with a full stack
-  f()
-  tracegc.start()
-  print"+"
-end
-
-print'OK'

testes/db.lua

@@ -1,4 +1,4 @@
--- $Id: testes/db.lua $
+-- $Id: db.lua,v 1.79 2016/11/07 13:02:34 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 -- testing debug library
@@ -31,7 +31,6 @@ end
 
 do
   assert(not pcall(debug.getinfo, print, "X"))   -- invalid option
-  assert(not pcall(debug.getinfo, 0, ">"))   -- invalid option
   assert(not debug.getinfo(1000))   -- out of range level
   assert(not debug.getinfo(-1))     -- out of range level
   local a = debug.getinfo(print)
@@ -120,16 +119,6 @@ else
 end
 ]], {2,3,4,7})
 
-test([[
-local function foo()
-end
-foo()
-A = 1
-A = 2
-A = 3
-]], {2, 3, 2, 4, 5, 6})
-
-
 test([[--
 if nil then
   a=1
@@ -173,27 +162,9 @@ test([[for i,v in pairs{'a','b'} do
 end
 ]], {1,2,1,2,1,3})
 
-test([[for i=1,4 do a=1 end]], {1,1,1,1})
+test([[for i=1,4 do a=1 end]], {1,1,1,1,1})
 
 
-do   -- testing line info/trace with large gaps in source
-
-  local a = {1, 2, 3, 10, 124, 125, 126, 127, 128, 129, 130,
-             255, 256, 257, 500, 1000}
-  local s = [[
-     local b = {10}
-     a = b[1] X + Y b[1]
-     b = 4
-  ]]
-  for _, i in ipairs(a) do
-    local subs = {X = string.rep("\n", i)}
-    for _, j in ipairs(a) do
-      subs.Y = string.rep("\n", j)
-      local s = string.gsub(s, "[XY]", subs)
-      test(s, {1, 2 + i, 2 + i + j, 2 + i, 2 + i + j, 3 + i + j})
-    end
-  end
-end
 
 print'+'
 
@@ -216,23 +187,19 @@ assert(not debug.getlocal(co, foo, 3))
 assert(not debug.getlocal(print, 1))
 
 
-local function foo () return (debug.getlocal(1, -1)) end
-assert(not foo(10))
-
-
 -- varargs
 local function foo (a, ...)
   local t = table.pack(...)
   for i = 1, t.n do
     local n, v = debug.getlocal(1, -i)
-    assert(n == "(vararg)" and v == t[i])
+    assert(n == "(*vararg)" and v == t[i])
   end
   assert(not debug.getlocal(1, -(t.n + 1)))
   assert(not debug.setlocal(1, -(t.n + 1), 30))
   if t.n > 0 then
     (function (x)
-      assert(debug.setlocal(2, -1, x) == "(vararg)")
-      assert(debug.setlocal(2, -t.n, x) == "(vararg)")
+      assert(debug.setlocal(2, -1, x) == "(*vararg)")
+      assert(debug.setlocal(2, -t.n, x) == "(*vararg)")
      end)(430)
      assert(... == 430)
   end
@@ -246,6 +213,9 @@ for i = 1, (_soft and 100 or 1000) do a[i] = i end
 foo(table.unpack(a))
 a = nil
 
+-- access to vararg in non-vararg function
+local function foo () return debug.getlocal(1, -1) end
+assert(not foo(10))
 
 
 do   -- test hook presence in debug info
@@ -266,10 +236,6 @@ do   -- test hook presence in debug info
 end
 
 
--- hook table has weak keys
-assert(getmetatable(debug.getregistry()._HOOKKEY).__mode == 'k')
-
-
 a = {}; L = nil
 local glob = 1
 local oldglob = glob
@@ -320,7 +286,7 @@ alo' .. [[
 assert(debug.getinfo(1, "l").currentline == L+11)  -- check count of lines
 
 
-function g (...)
+function g(...)
   local arg = {...}
   do local a,b,c; a=math.sin(40); end
   local feijao
@@ -343,9 +309,9 @@ assert(a[f] and a[g] and a[assert] and a[debug.getlocal] and not a[print])
 -- tests for manipulating non-registered locals (C and Lua temporaries)
 
 local n, v = debug.getlocal(0, 1)
-assert(v == 0 and n == "(C temporary)")
+assert(v == 0 and n == "(*temporary)")
 local n, v = debug.getlocal(0, 2)
-assert(v == 2 and n == "(C temporary)")
+assert(v == 2 and n == "(*temporary)")
 assert(not debug.getlocal(0, 3))
 assert(not debug.getlocal(0, 0))
 
@@ -362,30 +328,7 @@ assert(g(0,0) == 30)
  
 
 debug.sethook(nil);
-assert(not debug.gethook())
-
-
--- minimal tests for setuservalue/getuservalue
-do
-  assert(not debug.setuservalue(io.stdin, 10))
-  local a, b = debug.getuservalue(io.stdin, 10)
-  assert(a == nil and not b)
-end
-
--- testing iteraction between multiple values x hooks
-do
-  local function f(...) return 3, ... end
-  local count = 0
-  local a = {}
-  for i = 1, 100 do a[i] = i end
-  debug.sethook(function () count = count + 1 end, "", 1)
-  local t = {table.unpack(a)}
-  assert(#t == 100)
-  t = {table.unpack(a, 1, 3)}
-  assert(#t == 3)
-  t = {f(table.unpack(a, 1, 30))}
-  assert(#t == 31)
-end
+assert(debug.gethook() == nil)
 
 
 -- testing access to function arguments
@@ -425,14 +368,12 @@ end, "c")
 a:f(1,2,3,4,5)
 assert(X.self == a and X.a == 1   and X.b == 2 and X.c == nil)
 assert(XX == 12)
-assert(not debug.gethook())
+assert(debug.gethook() == nil)
 
 
 -- testing access to local variables in return hook (bug in 5.2)
 do
-  local X = false
-
-  local function foo (a, b, ...)
+  local function foo (a, b)
     do local x,y,z end
     local c, d = 10, 20
     return
@@ -440,67 +381,20 @@ do
 
   local function aux ()
     if debug.getinfo(2).name == "foo" then
-      X = true   -- to signal that it found 'foo'
+      foo = nil   -- to signal that it found 'foo'
       local tab = {a = 100, b = 200, c = 10, d = 20}
       for n, v in pairs(collectlocals(2)) do
         assert(tab[n] == v)
-        tab[n] = undef
+        tab[n] = nil
       end
       assert(next(tab) == nil)    -- 'tab' must be empty
     end
   end
 
   debug.sethook(aux, "r"); foo(100, 200); debug.sethook()
-  assert(X)
-
+  assert(foo == nil)
 end
 
-
-local function eqseq (t1, t2)
-  assert(#t1 == #t2)
-  for i = 1, #t1 do
-    assert(t1[i] == t2[i])
-  end
-end
-
-
-do  print("testing inspection of parameters/returned values")
-  local on = false
-  local inp, out
-
-  local function hook (event)
-    if not on then return end
-    local ar = debug.getinfo(2, "ruS")
-    local t = {}
-    for i = ar.ftransfer, ar.ftransfer + ar.ntransfer - 1 do
-      local _, v = debug.getlocal(2, i)
-      t[#t + 1] = v 
-    end
-    if event == "return" then
-      out = t
-    else
-      inp = t
-    end
-  end
-
-  debug.sethook(hook, "cr")
-
-  on = true; math.sin(3); on = false
-  eqseq(inp, {3}); eqseq(out, {math.sin(3)})
-
-  on = true; select(2, 10, 20, 30, 40); on = false
-  eqseq(inp, {2, 10, 20, 30, 40}); eqseq(out, {20, 30, 40})
-
-  local function foo (a, ...) return ... end
-  local function foo1 () on = not on; return foo(20, 10, 0) end
-  foo1(); on = false
-  eqseq(inp, {20}); eqseq(out, {10, 0})
-
-  debug.sethook()
-end
-
-
-
 -- testing upvalue access
 local function getupvalues (f)
   local t = {}
@@ -622,7 +516,7 @@ co = load[[
 local a = 0
 -- 'A' should be visible to debugger only after its complete definition
 debug.sethook(function (e, l)
-  if l == 3 then a = a + 1; assert(debug.getlocal(2, 1) == "(temporary)")
+  if l == 3 then a = a + 1; assert(debug.getlocal(2, 1) == "(*temporary)")
   elseif l == 4 then a = a + 1; assert(debug.getlocal(2, 1) == "A")
   end
 end, "l")
@@ -660,11 +554,6 @@ t = debug.getinfo(1)   -- main
 assert(t.isvararg == true and t.nparams == 0 and t.nups == 1 and
        debug.getupvalue(t.func, 1) == "_ENV")
 
-t = debug.getinfo(math.sin)   -- C function
-assert(t.isvararg == true and t.nparams == 0 and t.nups == 0)
-
-t = debug.getinfo(string.gmatch("abc", "a"))   -- C closure
-assert(t.isvararg == true and t.nparams == 0 and t.nups > 0)
 
 
 
@@ -677,7 +566,7 @@ local function checktraceback (co, p, level)
     assert(i == 0 or string.find(l, p[i]))
     i = i+1
   end
-  assert(p[i] == undef)
+  assert(p[i] == nil)
 end
 
 
@@ -712,7 +601,7 @@ assert(x.currentline == l.currentline and x.activelines[x.currentline])
 assert(type(x.func) == "function")
 for i=x.linedefined + 1, x.lastlinedefined do
   assert(x.activelines[i])
-  x.activelines[i] = undef
+  x.activelines[i] = nil
 end
 assert(next(x.activelines) == nil)   -- no 'extra' elements
 assert(not debug.getinfo(co, 2))
@@ -756,12 +645,7 @@ assert(a and b == 30)
 
 -- check traceback of suspended (or dead with error) coroutines
 
-function f(i)
-  if i == 0 then error(i)
-  else coroutine.yield(); f(i-1)
-  end
-end
-
+function f(i) if i==0 then error(i) else coroutine.yield(); f(i-1) end end
 
 co = coroutine.create(function (x) f(x) end)
 a, b = coroutine.resume(co, 3)
@@ -816,19 +700,16 @@ setmetatable(a, {
 
 local b = setmetatable({}, getmetatable(a))
 
-assert(a[3] == "index" and a^3 == "pow" and a..a == "concat")
-assert(a/3 == "div" and 3%a == "mod")
-assert(a+3 == "add" and 3-a == "sub" and a*3 == "mul" and
-       -a == "unm" and #a == "len" and a&3 == "band")
-assert(a + 30000 == "add" and a - 3.0 == "sub" and a * 3.0 == "mul" and
-       -a == "unm" and #a == "len" and a & 3 == "band")
-assert(a|3 == "bor" and 3~a == "bxor" and a<<3 == "shl" and a>>1 == "shr")
-assert (a==b and a.op == "eq")
-assert (a>=b and a.op == "le")
-assert ("x">=a and a.op == "le")
-assert (a>b and a.op == "lt")
-assert (a>10 and a.op == "lt")
-assert(~a == "bnot")
+assert(a[3] == "__index" and a^3 == "__pow" and a..a == "__concat")
+assert(a/3 == "__div" and 3%a == "__mod")
+assert(a+3 == "__add" and 3-a == "__sub" and a*3 == "__mul" and
+       -a == "__unm" and #a == "__len" and a&3 == "__band")
+assert(a|3 == "__bor" and 3~a == "__bxor" and a<<3 == "__shl" and
+       a>>1 == "__shr")
+assert (a==b and a.op == "__eq")
+assert (a>=b and a.op == "__le")
+assert (a>b and a.op == "__lt")
+assert(~a == "__bnot")
 
 do   -- testing for-iterator name
   local function f()
@@ -897,20 +778,20 @@ end
 
 
 print("testing debug functions on chunk without debug info")
-prog = [[-- program to be loaded without debug information (strip)
+prog = [[-- program to be loaded without debug information
 local debug = require'debug'
 local a = 12  -- a local variable
 
 local n, v = debug.getlocal(1, 1)
-assert(n == "(temporary)" and v == debug)   -- unkown name but known value
+assert(n == "(*temporary)" and v == debug)   -- unkown name but known value
 n, v = debug.getlocal(1, 2)
-assert(n == "(temporary)" and v == 12)   -- unkown name but known value
+assert(n == "(*temporary)" and v == 12)   -- unkown name but known value
 
 -- a function with an upvalue
 local f = function () local x; return a end
 n, v = debug.getupvalue(f, 1)
-assert(n == "(no name)" and v == 12)
-assert(debug.setupvalue(f, 1, 13) == "(no name)")
+assert(n == "(*no name)" and v == 12)
+assert(debug.setupvalue(f, 1, 13) == "(*no name)")
 assert(a == 13)
 
 local t = debug.getinfo(f)
@@ -940,23 +821,6 @@ local f = assert(load(string.dump(load(prog), true)))
 
 assert(f() == 13)
 
-do   -- bug in 5.4.0: line hooks in stripped code
-  local function foo ()
-    local a = 1
-    local b = 2
-    return b
-  end
-
-  local s = load(string.dump(foo, true))
-  local line = true
-  debug.sethook(function (e, l)
-    assert(e == "line")
-    line = l
-  end, "l")
-  assert(s() == 2); debug.sethook(nil)
-  assert(line == nil)  -- hook called withoug debug info for 1st instruction
-end
-
 do   -- tests for 'source' in binary dumps
   local prog = [[
     return function (x)

testes/errors.lua

@@ -1,4 +1,4 @@
--- $Id: testes/errors.lua $
+-- $Id: errors.lua,v 1.94 2016/12/21 19:23:02 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print("testing errors")
@@ -18,15 +18,14 @@ end
 
 local function doit (s)
   local f, msg = load(s)
-  if not f then return msg end
+  if f == nil then return msg end
   local cond, msg = pcall(f)
   return (not cond) and msg
 end
 
 
-local function checkmessage (prog, msg, debug)
+local function checkmessage (prog, msg)
   local m = doit(prog)
-  if debug then print(m) end
   assert(string.find(m, msg, 1, true))
 end
 
@@ -68,45 +67,6 @@ checksyntax([[
 ]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
 
 
-do   -- testing errors in goto/break
-  local function checksyntax (prog, msg, line)
-    local st, err = load(prog)
-    assert(string.find(err, "line " .. line))
-    assert(string.find(err, msg, 1, true))
-  end
-
-  checksyntax([[
-    ::A:: a = 1
-    ::A::
-  ]], "label 'A' already defined", 1)
-
-  checksyntax([[
-    a = 1
-    goto A
-    do ::A:: end
-  ]], "no visible label 'A'", 2)
-
-end
-
-
-if not T then
-  (Message or print)
-    ('\n >>> testC not active: skipping memory message test <<<\n')
-else
-  print "testing memory error message"
-  local a = {}
-  for i = 1, 10000 do a[i] = true end   -- preallocate array
-  collectgarbage()
-  T.totalmem(T.totalmem() + 10000)
-  -- force a memory error (by a small margin)
-  local st, msg = pcall(function()
-    for i = 1, 100000 do a[i] = tostring(i) end
-  end)
-  T.totalmem(0)
-  assert(not st and msg == "not enough" .. " memory")
-end
-
-
 -- tests for better error messages
 
 checkmessage("a = {} + 1", "arithmetic")
@@ -121,21 +81,6 @@ assert(not string.find(doit"a={13}; local bbbb=1; a[bbbb](3)", "'bbbb'"))
 checkmessage("a={13}; local bbbb=1; a[bbbb](3)", "number")
 checkmessage("a=(1)..{}", "a table value")
 
--- calls
-checkmessage("local a; a(13)", "local 'a'")
-checkmessage([[
-  local a = setmetatable({}, {__add = 34})
-  a = a + 1
-]], "metamethod 'add'")
-checkmessage([[
-  local a = setmetatable({}, {__lt = {}})
-  a = a > a
-]], "metamethod 'lt'")
-
--- tail calls
-checkmessage("local a={}; return a.bbbb(3)", "field 'bbbb'")
-checkmessage("a={}; do local a=1 end; return a:bbbb(3)", "method 'bbbb'")
-
 checkmessage("a = #print", "length of a function value")
 checkmessage("a = #3", "length of a number value")
 
@@ -143,7 +88,7 @@ aaa = nil
 checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
 checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
 checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
-checkmessage("local a,b,c; (function () a = b+1.1 end)()", "upvalue 'b'")
+checkmessage("local a,b,c; (function () a = b+1 end)()", "upvalue 'b'")
 assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
 
 -- upvalues being indexed do not go to the stack
@@ -152,9 +97,9 @@ checkmessage("local a,b,cc; (function () a.x = 1 end)()", "upvalue 'a'")
 
 checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
 
-checkmessage("b=1; local aaa={}; x=aaa+b", "local 'aaa'")
-checkmessage("aaa={}; x=3.3/aaa", "global 'aaa'")
-checkmessage("aaa=2; b=nil;x=aaa*b", "global 'b'")
+checkmessage("b=1; local aaa='a'; x=aaa+b", "local 'aaa'")
+checkmessage("aaa={}; x=3/aaa", "global 'aaa'")
+checkmessage("aaa='2'; b=nil;x=aaa*b", "global 'b'")
 checkmessage("aaa={}; x=-aaa", "global 'aaa'")
 
 -- short circuit
@@ -174,9 +119,9 @@ checkmessage("print(10 < '23')", "number with string")
 -- float->integer conversions
 checkmessage("local a = 2.0^100; x = a << 2", "local a")
 checkmessage("local a = 1 >> 2.0^100", "has no integer representation")
-checkmessage("local a = 10.1 << 2.0^100", "has no integer representation")
+checkmessage("local a = '10' << 2.0^100", "has no integer representation")
 checkmessage("local a = 2.0^100 & 1", "has no integer representation")
-checkmessage("local a = 2.0^100 & 1e100", "has no integer representation")
+checkmessage("local a = 2.0^100 & '1'", "has no integer representation")
 checkmessage("local a = 2.0 | 1e40", "has no integer representation")
 checkmessage("local a = 2e100 ~ 1", "has no integer representation")
 checkmessage("string.sub('a', 2.0^100)", "has no integer representation")
@@ -191,23 +136,6 @@ checkmessage("a = 24 // 0", "divide by zero")
 checkmessage("a = 1 % 0", "'n%0'")
 
 
--- type error for an object which is neither in an upvalue nor a register.
--- The following code will try to index the value 10 that is stored in
--- the metatable, without moving it to a register.
-checkmessage("local a = setmetatable({}, {__index = 10}).x",
-             "attempt to index a number value")
-
-
--- numeric for loops
-checkmessage("for i = {}, 10 do end", "table")
-checkmessage("for i = io.stdin, 10 do end", "FILE")
-checkmessage("for i = {}, 10 do end", "initial value")
-checkmessage("for i = 1, 'x', 10 do end", "string")
-checkmessage("for i = 1, {}, 10 do end", "limit")
-checkmessage("for i = 1, {} do end", "limit")
-checkmessage("for i = 1, 10, print do end", "step")
-checkmessage("for i = 1, 10, print do end", "function")
-
 -- passing light userdata instead of full userdata
 _G.D = debug
 checkmessage([[
@@ -352,8 +280,8 @@ end
 
 local function lineerror (s, l)
   local err,msg = pcall(load(s))
-  local line = tonumber(string.match(msg, ":(%d+):"))
-  assert(line == l or (not line and not l))
+  local line = string.match(msg, ":(%d+):")
+  assert((line and line+0) == l)
 end
 
 lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
@@ -399,68 +327,35 @@ local p = [[
 g()
 ]]
 X=3;lineerror((p), 3)
-X=0;lineerror((p), false)
+X=0;lineerror((p), nil)
 X=1;lineerror((p), 2)
 X=2;lineerror((p), 1)
 
 
-lineerror([[
-local b = false
-if not b then
-  error 'test'
-end]], 3)
-
-lineerror([[
-local b = false
-if not b then
-  if not b then
-    if not b then
-      error 'test'
-    end
-  end
-end]], 5)
-
-do
-  -- Force a negative estimate for base line. Error in instruction 2
-  -- (after VARARGPREP, GETGLOBAL), with first absolute line information
-  -- (forced by too many lines) in instruction 0.
-  local s = string.format("%s return __A.x", string.rep("\n", 300))
-  lineerror(s, 301)
-end
-
-
 if not _soft then
   -- several tests that exaust the Lua stack
   collectgarbage()
   print"testing stack overflow"
   C = 0
-  -- get line where stack overflow will happen
-  local l = debug.getinfo(1, "l").currentline + 1
-  local function auxy () C=C+1; auxy() end     -- produce a stack overflow
-  function y ()
-    collectgarbage("stop")   -- avoid running finalizers without stack space
-    auxy()
-    collectgarbage("restart")
-  end
+  local l = debug.getinfo(1, "l").currentline; function y () C=C+1; y() end
 
   local function checkstackmessage (m)
-    print("(expected stack overflow after " .. C .. " calls)")
-    C = 0    -- prepare next count
-    return (string.find(m, "stack overflow"))
+    return (string.find(m, "^.-:%d+: stack overflow"))
   end
   -- repeated stack overflows (to check stack recovery)
   assert(checkstackmessage(doit('y()')))
+  print('+')
   assert(checkstackmessage(doit('y()')))
+  print('+')
   assert(checkstackmessage(doit('y()')))
+  print('+')
 
 
   -- error lines in stack overflow
+  C = 0
   local l1
   local function g(x)
-    l1 = debug.getinfo(x, "l").currentline + 2
-    collectgarbage("stop")   -- avoid running finalizers without stack space
-    auxy()
-    collectgarbage("restart")
+    l1 = debug.getinfo(x, "l").currentline; y()
   end
   local _, stackmsg = xpcall(g, debug.traceback, 1)
   print('+')
@@ -566,7 +461,7 @@ checksyntax("a\1a = 1", "", "<\\1>", 1)
 checksyntax("\255a = 1", "", "<\\255>", 1)
 
 doit('I = load("a=9+"); a=3')
-assert(a==3 and not I)
+assert(a==3 and I == nil)
 print('+')
 
 lim = 1000
@@ -579,29 +474,26 @@ end
 
 -- testing syntax limits
 
-local function testrep (init, rep, close, repc, finalresult)
-  local s = init .. string.rep(rep, 100) .. close .. string.rep(repc, 100)
-  local res, msg = load(s)
-  assert(res)   -- 100 levels is OK
-  if (finalresult) then
-    assert(res() == finalresult)
-  end
-  s = init .. string.rep(rep, 500)
-  local res, msg = load(s)   -- 500 levels not ok
-  assert(not res and (string.find(msg, "too many") or
-                      string.find(msg, "overflow")))
+local maxClevel = 200    -- LUAI_MAXCCALLS (in llimits.h)
+
+local function testrep (init, rep, close, repc)
+  local s = init .. string.rep(rep, maxClevel - 10) .. close ..
+               string.rep(repc, maxClevel - 10)
+  assert(load(s))   -- 190 levels is OK
+  s = init .. string.rep(rep, maxClevel + 1)
+  checkmessage(s, "too many C levels")
 end
 
 testrep("local a; a", ",a", "= 1", ",1")    -- multiple assignment
 testrep("local a; a=", "{", "0", "}")
-testrep("return ", "(", "2", ")", 2)
-testrep("local function a (x) return x end; return ", "a(", "2.2", ")", 2.2)
+testrep("local a; a=", "(", "2", ")")
+testrep("local a; ", "a(", "2", ")")
 testrep("", "do ", "", " end")
 testrep("", "while a do ", "", " end")
 testrep("local a; ", "if a then else ", "", " end")
 testrep("", "function foo () ", "", " end")
-testrep("local a = ''; return ", "a..", "'a'", "", "a")
-testrep("local a = 1; return ", "a^", "a", "", 1)
+testrep("local a; a=", "a..", "a", "")
+testrep("local a; a=", "a^", "a", "")
 
 checkmessage("a = f(x" .. string.rep(",x", 260) .. ")", "too many registers")
 

testes/events.lua

@@ -1,4 +1,4 @@
--- $Id: testes/events.lua $
+-- $Id: events.lua,v 1.45 2016/12/21 19:23:02 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing metatables')
@@ -15,7 +15,7 @@ X = X+10
 assert(X == 30 and _G.X == 20)
 B = false
 assert(B == false)
-_ENV["B"] = undef
+B = nil
 assert(B == 30)
 
 assert(getmetatable{} == nil)
@@ -70,12 +70,8 @@ end
 local c = {}
 a = setmetatable({}, t)
 t.__newindex = c
-t.__index = c
-a[1] = 10; a[2] = 20; a[3] = 90;
-for i = 4, 20 do a[i] = i * 10 end
-assert(a[1] == 10 and a[2] == 20 and a[3] == 90)
-for i = 4, 20 do assert(a[i] == i * 10) end
-assert(next(a) == nil)
+a[1] = 10; a[2] = 20; a[3] = 90
+assert(c[1] == 10 and c[2] == 20 and c[3] == 90)
 
 
 do
@@ -99,8 +95,7 @@ do  -- newindex
   foi = false; a['a1']=0; assert(not foi)
   foi = false; a['a11']=0; assert(foi)
   foi = false; a[11]=0; assert(foi)
-  foi = false; a[1]=undef; assert(not foi)
-  a[1] = undef
+  foi = false; a[1]=nil; assert(not foi)
   foi = false; a[1]=nil; assert(foi)
 end
 
@@ -111,9 +106,9 @@ t.__call = f
 
 do
   local x,y = a(table.unpack{'a', 1})
-  assert(x==a and y[1]=='a' and y[2]==1 and y[3]==undef)
+  assert(x==a and y[1]=='a' and y[2]==1 and y[3]==nil)
   x,y = a()
-  assert(x==a and y[1]==undef)
+  assert(x==a and y[1]==nil)
 end
 
 
@@ -138,55 +133,52 @@ t.__bxor = f("bxor")
 t.__shl = f("shl")
 t.__shr = f("shr")
 t.__bnot = f("bnot")
-t.__lt = f("lt")
-t.__le = f("le")
 
-
-local function checkcap (t)
-  assert(#cap + 1 == #t)
-  for i = 1, #t do
-    assert(cap[i - 1] == t[i])
-    assert(math.type(cap[i - 1]) == math.type(t[i]))
-  end
-end
-
--- Some tests are done inside small anonymous functions to ensure
--- that constants go to constant table even in debug compilation,
--- when the constant table is very small.
-assert(b+5 == b); checkcap{"add", b, 5}
-assert(5.2 + b == 5.2); checkcap{"add", 5.2, b}
-assert(b+'5' == b); checkcap{"add", b, '5'}
-assert(5+b == 5); checkcap{"add", 5, b}
-assert('5'+b == '5'); checkcap{"add", '5', b}
-b=b-3; assert(getmetatable(b) == t); checkcap{"sub", b, 3}
-assert(5-a == 5); checkcap{"sub", 5, a}
-assert('5'-a == '5'); checkcap{"sub", '5', a}
-assert(a*a == a); checkcap{"mul", a, a}
-assert(a/0 == a); checkcap{"div", a, 0}
-assert(a/0.0 == a); checkcap{"div", a, 0.0}
-assert(a%2 == a); checkcap{"mod", a, 2}
-assert(a // (1/0) == a); checkcap{"idiv", a, 1/0}
-;(function () assert(a & "hi" == a) end)(); checkcap{"band", a, "hi"}
-;(function () assert(10 & a  == 10) end)(); checkcap{"band", 10, a}
-;(function () assert(a | 10  == a) end)(); checkcap{"bor", a, 10}
-assert(a | "hi" == a); checkcap{"bor", a, "hi"}
-assert("hi" ~ a == "hi"); checkcap{"bxor", "hi", a}
-;(function () assert(10 ~ a == 10) end)(); checkcap{"bxor", 10, a}
-assert(-a == a); checkcap{"unm", a, a}
-assert(a^4.0 == a); checkcap{"pow", a, 4.0}
-assert(a^'4' == a); checkcap{"pow", a, '4'}
-assert(4^a == 4); checkcap{"pow", 4, a}
-assert('4'^a == '4'); checkcap{"pow", '4', a}
-assert(#a == a); checkcap{"len", a, a}
-assert(~a == a); checkcap{"bnot", a, a}
-assert(a << 3 == a); checkcap{"shl", a, 3}
-assert(1.5 >> a == 1.5); checkcap{"shr", 1.5, a}
-
--- for comparison operators, all results are true
-assert(5.0 > a); checkcap{"lt", a, 5.0}
-assert(a >= 10); checkcap{"le", 10, a}
-assert(a <= -10.0); checkcap{"le", a, -10.0}
-assert(a < -10); checkcap{"lt", a, -10}
+assert(b+5 == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == 5 and cap[3]==nil)
+assert(b+'5' == b)
+assert(cap[0] == "add" and cap[1] == b and cap[2] == '5' and cap[3]==nil)
+assert(5+b == 5)
+assert(cap[0] == "add" and cap[1] == 5 and cap[2] == b and cap[3]==nil)
+assert('5'+b == '5')
+assert(cap[0] == "add" and cap[1] == '5' and cap[2] == b and cap[3]==nil)
+b=b-3; assert(getmetatable(b) == t)
+assert(5-a == 5)
+assert(cap[0] == "sub" and cap[1] == 5 and cap[2] == a and cap[3]==nil)
+assert('5'-a == '5')
+assert(cap[0] == "sub" and cap[1] == '5' and cap[2] == a and cap[3]==nil)
+assert(a*a == a)
+assert(cap[0] == "mul" and cap[1] == a and cap[2] == a and cap[3]==nil)
+assert(a/0 == a)
+assert(cap[0] == "div" and cap[1] == a and cap[2] == 0 and cap[3]==nil)
+assert(a%2 == a)
+assert(cap[0] == "mod" and cap[1] == a and cap[2] == 2 and cap[3]==nil)
+assert(a // (1/0) == a)
+assert(cap[0] == "idiv" and cap[1] == a and cap[2] == 1/0 and cap[3]==nil)
+assert(a & "hi" == a)
+assert(cap[0] == "band" and cap[1] == a and cap[2] == "hi" and cap[3]==nil)
+assert(a | "hi" == a)
+assert(cap[0] == "bor" and cap[1] == a and cap[2] == "hi" and cap[3]==nil)
+assert("hi" ~ a == "hi")
+assert(cap[0] == "bxor" and cap[1] == "hi" and cap[2] == a and cap[3]==nil)
+assert(-a == a)
+assert(cap[0] == "unm" and cap[1] == a)
+assert(a^4 == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == 4 and cap[3]==nil)
+assert(a^'4' == a)
+assert(cap[0] == "pow" and cap[1] == a and cap[2] == '4' and cap[3]==nil)
+assert(4^a == 4)
+assert(cap[0] == "pow" and cap[1] == 4 and cap[2] == a and cap[3]==nil)
+assert('4'^a == '4')
+assert(cap[0] == "pow" and cap[1] == '4' and cap[2] == a and cap[3]==nil)
+assert(#a == a)
+assert(cap[0] == "len" and cap[1] == a)
+assert(~a == a)
+assert(cap[0] == "bnot" and cap[1] == a)
+assert(a << 3 == a)
+assert(cap[0] == "shl" and cap[1] == a and cap[2] == 3)
+assert(1.5 >> a == 1.5)
+assert(cap[0] == "shr" and cap[1] == 1.5 and cap[2] == a)
 
 
 -- test for rawlen
@@ -210,23 +202,9 @@ t.__lt = function (a,b,c)
  return a<b, "dummy"
 end
 
-t.__le = function (a,b,c)
-  assert(c == nil)
-  if type(a) == 'table' then a = a.x end
-  if type(b) == 'table' then b = b.x end
- return a<=b, "dummy"
-end
-
-t.__eq = function (a,b,c)
-  assert(c == nil)
-  if type(a) == 'table' then a = a.x end
-  if type(b) == 'table' then b = b.x end
- return a == b, "dummy"
-end
-
 function Op(x) return setmetatable({x=x}, t) end
 
-local function test (a, b, c)
+local function test ()
   assert(not(Op(1)<Op(1)) and (Op(1)<Op(2)) and not(Op(2)<Op(1)))
   assert(not(1 < Op(1)) and (Op(1) < 2) and not(2 < Op(1)))
   assert(not(Op('a')<Op('a')) and (Op('a')<Op('b')) and not(Op('b')<Op('a')))
@@ -239,13 +217,18 @@ local function test (a, b, c)
   assert((1 >= Op(1)) and not(1 >= Op(2)) and (Op(2) >= 1))
   assert((Op('a')>=Op('a')) and not(Op('a')>=Op('b')) and (Op('b')>=Op('a')))
   assert(('a' >= Op('a')) and not(Op('a') >= 'b') and (Op('b') >= Op('a')))
-  assert(Op(1) == Op(1) and Op(1) ~= Op(2))
-  assert(Op('a') == Op('a') and Op('a') ~= Op('b'))
-  assert(a == a and a ~= b)
-  assert(Op(3) == c)
 end
 
-test(Op(1), Op(2), Op(3))
+test()
+
+t.__le = function (a,b,c)
+  assert(c == nil)
+  if type(a) == 'table' then a = a.x end
+  if type(b) == 'table' then b = b.x end
+ return a<=b, "dummy"
+end
+
+test()  -- retest comparisons, now using both `lt' and `le'
 
 
 -- test `partial order'
@@ -263,11 +246,19 @@ end
 t.__lt = function (a,b)
   for k in pairs(a) do
     if not b[k] then return false end
-    b[k] = undef
+    b[k] = nil
   end
   return next(b) ~= nil
 end
 
+t.__le = nil
+
+assert(Set{1,2,3} < Set{1,2,3,4})
+assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
+assert((Set{1,2,3,4} <= Set{1,2,3,4}))
+assert((Set{1,2,3,4} >= Set{1,2,3,4}))
+assert((Set{1,3} <= Set{3,5}))   -- wrong!! model needs a `le' method ;-)
+
 t.__le = function (a,b)
   for k in pairs(a) do
     if not b[k] then return false end
@@ -275,19 +266,14 @@ t.__le = function (a,b)
   return true
 end
 
-assert(Set{1,2,3} < Set{1,2,3,4})
-assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
-assert((Set{1,2,3,4} <= Set{1,2,3,4}))
-assert((Set{1,2,3,4} >= Set{1,2,3,4}))
-assert(not (Set{1,3} <= Set{3,5}))
+assert(not (Set{1,3} <= Set{3,5}))   -- now its OK!
 assert(not(Set{1,3} <= Set{3,5}))
 assert(not(Set{1,3} >= Set{3,5}))
 
-
 t.__eq = function (a,b)
   for k in pairs(a) do
     if not b[k] then return false end
-    b[k] = undef
+    b[k] = nil
   end
   return next(b) == nil
 end
@@ -302,27 +288,16 @@ assert(Set{1,3,5} ~= Set{3,5,1,6})
 
 -- '__eq' is not used for table accesses
 t[Set{1,3,5}] = 1
-assert(t[Set{1,3,5}] == undef)
-
-
-do   -- test invalidating flags
-  local mt = {__eq = true}
-  local a = setmetatable({10}, mt)
-  local b = setmetatable({10}, mt)
-  mt.__eq = nil
-  assert(a ~= b)   -- no metamethod
-  mt.__eq = function (x,y) return x[1] == y[1] end
-  assert(a == b)   -- must use metamethod now
-end
+assert(t[Set{1,3,5}] == nil)
 
 
 if not T then
   (Message or print)('\n >>> testC not active: skipping tests for \z
-userdata <<<\n')
+userdata equality <<<\n')
 else
-  local u1 = T.newuserdata(0, 1)
-  local u2 = T.newuserdata(0, 1)
-  local u3 = T.newuserdata(0, 1)
+  local u1 = T.newuserdata(0)
+  local u2 = T.newuserdata(0)
+  local u3 = T.newuserdata(0)
   assert(u1 ~= u2 and u1 ~= u3)
   debug.setuservalue(u1, 1);
   debug.setuservalue(u2, 2);
@@ -336,12 +311,6 @@ else
   assert(u1 == u3 and u3 == u1 and u1 ~= u2)
   assert(u2 == u1 and u2 == u3 and u3 == u2)
   assert(u2 ~= {})   -- different types cannot be equal
-  assert(rawequal(u1, u1) and not rawequal(u1, u3))
-
-  local mirror = {}
-  debug.setmetatable(u3, {__index = mirror, __newindex = mirror})
-  for i = 1, 10 do u3[i] = i end
-  for i = 1, 10 do assert(u3[i] == i) end
 end
 
 
@@ -387,7 +356,6 @@ t1 = {};  c = {}; setmetatable(c, t1)
 d = {}
 t1.__eq = function () return true end
 t1.__lt = function () return true end
-t1.__le = function () return false end
 setmetatable(d, t1)
 assert(c == d and c < d and not(d <= c))
 t2 = {}
@@ -453,10 +421,10 @@ assert(getmetatable(true) == nil)
 
 debug.setmetatable(nil, mt)
 assert(getmetatable(nil) == mt)
-mt.__add = function (a,b) return (a or 1) + (b or 2) end
-assert(10 + nil == 12)
-assert(nil + 23 == 24)
-assert(nil + nil == 3)
+mt.__add = function (a,b) return (a or 0) + (b or 0) end
+assert(10 + nil == 10)
+assert(nil + 23 == 23)
+assert(nil + nil == 0)
 debug.setmetatable(nil, nil)
 assert(getmetatable(nil) == nil)
 

testes/files.lua

@@ -1,4 +1,4 @@
--- $Id: testes/files.lua $
+-- $Id: files.lua,v 1.95 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 local debug = require "debug"
@@ -28,9 +28,6 @@ assert(not io.close(io.stdin) and
        not io.stdout:close() and
        not io.stderr:close())
 
--- cannot call close method without an argument (new in 5.3.5)
-checkerr("got no value", io.stdin.close)
-
 
 assert(type(io.input()) == "userdata" and io.type(io.output()) == "file")
 assert(type(io.stdin) == "userdata" and io.type(io.stderr) == "file")
@@ -120,76 +117,27 @@ io.output(io.open(otherfile, "ab"))
 assert(io.write("\n\n\t\t  ", 3450, "\n"));
 io.close()
 
-
-do
-  -- closing file by scope
-  local F = nil
-  do
-    local f <close> = assert(io.open(file, "w"))
-    F = f
-  end
-  assert(tostring(F) == "file (closed)")
-end
+-- test writing/reading numbers
+f = assert(io.open(file, "w"))
+f:write(maxint, '\n')
+f:write(string.format("0X%x\n", maxint))
+f:write("0xABCp-3", '\n')
+f:write(0, '\n')
+f:write(-maxint, '\n')
+f:write(string.format("0x%X\n", -maxint))
+f:write("-0xABCp-3", '\n')
+assert(f:close())
+f = assert(io.open(file, "r"))
+assert(f:read("n") == maxint)
+assert(f:read("n") == maxint)
+assert(f:read("n") == 0xABCp-3)
+assert(f:read("n") == 0)
+assert(f:read("*n") == -maxint)            -- test old format (with '*')
+assert(f:read("n") == -maxint)
+assert(f:read("*n") == -0xABCp-3)            -- test old format (with '*')
+assert(f:close())
 assert(os.remove(file))
 
-
-do
-  -- test writing/reading numbers
-  local f <close> = assert(io.open(file, "w"))
-  f:write(maxint, '\n')
-  f:write(string.format("0X%x\n", maxint))
-  f:write("0xABCp-3", '\n')
-  f:write(0, '\n')
-  f:write(-maxint, '\n')
-  f:write(string.format("0x%X\n", -maxint))
-  f:write("-0xABCp-3", '\n')
-  assert(f:close())
-  local f <close> = assert(io.open(file, "r"))
-  assert(f:read("n") == maxint)
-  assert(f:read("n") == maxint)
-  assert(f:read("n") == 0xABCp-3)
-  assert(f:read("n") == 0)
-  assert(f:read("*n") == -maxint)            -- test old format (with '*')
-  assert(f:read("n") == -maxint)
-  assert(f:read("*n") == -0xABCp-3)            -- test old format (with '*')
-end
-assert(os.remove(file))
-
-
--- testing multiple arguments to io.read
-do
-  local f <close> = assert(io.open(file, "w"))
-  f:write[[
-a line
-another line
-1234
-3.45
-one
-two
-three
-]]
-  local l1, l2, l3, l4, n1, n2, c, dummy
-  assert(f:close())
-  local f <close> = assert(io.open(file, "r"))
-  l1, l2, n1, n2, dummy = f:read("l", "L", "n", "n")
-  assert(l1 == "a line" and l2 == "another line\n" and
-         n1 == 1234 and n2 == 3.45 and dummy == nil)
-  assert(f:close())
-  local f <close> = assert(io.open(file, "r"))
-  l1, l2, n1, n2, c, l3, l4, dummy = f:read(7, "l", "n", "n", 1, "l", "l")
-  assert(l1 == "a line\n" and l2 == "another line" and c == '\n' and
-         n1 == 1234 and n2 == 3.45 and l3 == "one" and l4 == "two"
-         and dummy == nil)
-  assert(f:close())
-  local f <close> = assert(io.open(file, "r"))
-  -- second item failing
-  l1, n1, n2, dummy = f:read("l", "n", "n", "l")
-  assert(l1 == "a line" and not n1)
-end
-assert(os.remove(file))
-
-
-
 -- test yielding during 'dofile'
 f = assert(io.open(file, "w"))
 f:write[[
@@ -200,7 +148,7 @@ return x + y * z
 assert(f:close())
 f = coroutine.wrap(dofile)
 assert(f(file) == 10)
-assert(f(100, 101) == 20)
+print(f(100, 101) == 20)
 assert(f(200) == 100 + 200 * 101)
 assert(os.remove(file))
 
@@ -228,7 +176,7 @@ assert(f:read("n") == 0Xdeadbeefdeadbeef); assert(f:read(2) == "x\n")
 assert(f:read("n") == 0x1.13aP3); assert(f:read(1) == "e")
 
 do   -- attempt to read too long number
-  assert(not f:read("n"))  -- fails
+  assert(f:read("n") == nil)  -- fails
   local s = f:read("L")   -- read rest of line
   assert(string.find(s, "^00*\n$"))  -- lots of 0's left
 end
@@ -314,14 +262,14 @@ assert(io.read() == "fourth_line")
 assert(io.read() == "")  -- empty line
 assert(io.read('n') == 3450)
 assert(io.read(1) == '\n')
-assert(not io.read(0))  -- end of file
-assert(not io.read(1))  -- end of file
-assert(not io.read(30000))  -- end of file
-assert(({io.read(1)})[2] == undef)
-assert(not io.read())  -- end of file
-assert(({io.read()})[2] == undef)
-assert(not io.read('n'))  -- end of file
-assert(({io.read('n')})[2] == undef)
+assert(io.read(0) == nil)  -- end of file
+assert(io.read(1) == nil)  -- end of file
+assert(io.read(30000) == nil)  -- end of file
+assert(({io.read(1)})[2] == nil)
+assert(io.read() == nil)  -- end of file
+assert(({io.read()})[2] == nil)
+assert(io.read('n') == nil)  -- end of file
+assert(({io.read('n')})[2] == nil)
 assert(io.read('a') == '')  -- end of file (OK for 'a')
 assert(io.read('a') == '')  -- end of file (OK for 'a')
 collectgarbage()
@@ -356,7 +304,7 @@ assert(io.read(string.len(t)) == t)
 assert(io.read(1) == ' ')
 assert(io.read(0))
 assert(io.read('a') == ';end of file\n')
-assert(not io.read(0))
+assert(io.read(0) == nil)
 assert(io.close(io.input()))
 
 
@@ -364,7 +312,7 @@ assert(io.close(io.input()))
 do
   local function ismsg (m)
     -- error message is not a code number
-    return (type(m) == "string" and not tonumber(m))
+    return (type(m) == "string" and tonumber(m) == nil)
   end
 
   -- read
@@ -393,7 +341,7 @@ assert(io.read"L" == "\n")
 assert(io.read"L" == "\n")
 assert(io.read"L" == "line\n")
 assert(io.read"L" == "other")
-assert(not io.read"L")
+assert(io.read"L" == nil)
 io.input():close()
 
 local f = assert(io.open(file))
@@ -418,51 +366,14 @@ assert(s == "lineother")
 
 io.output(file); io.write"a = 10 + 34\na = 2*a\na = -a\n":close()
 local t = {}
-assert(load(io.lines(file, "L"), nil, nil, t))()
+load(io.lines(file, "L"), nil, nil, t)()
 assert(t.a == -((10 + 34) * 2))
 
 
-do   -- testing closing file in line iteration
-
-  -- get the to-be-closed variable from a loop
-  local function gettoclose (lv)
-    lv = lv + 1
-    local stvar = 0   -- to-be-closed is 4th state variable in the loop
-    for i = 1, 1000 do
-      local n, v = debug.getlocal(lv, i)
-      if n == "(for state)" then
-        stvar = stvar + 1
-        if stvar == 4 then return v end
-      end
-    end
-  end
-
-  local f
-  for l in io.lines(file) do
-    f = gettoclose(1)
-    assert(io.type(f) == "file")
-    break
-  end
-  assert(io.type(f) == "closed file")
-
-  f = nil
-  local function foo (name)
-    for l in io.lines(name) do
-      f = gettoclose(1)
-      assert(io.type(f) == "file")
-      error(f)   -- exit loop with an error
-    end
-  end
-  local st, msg = pcall(foo, file)
-  assert(st == false and io.type(msg) == "closed file")
-
-end
-
-
 -- test for multipe arguments in 'lines'
 io.output(file); io.write"0123456789\n":close()
 for a,b in io.lines(file, 1, 1) do
-  if a == "\n" then assert(not b)
+  if a == "\n" then assert(b == nil)
   else assert(tonumber(a) == tonumber(b) - 1)
   end
 end
@@ -473,13 +384,13 @@ end
 
 for a,b,c in io.lines(file, "a", 0, 1) do
   if a == "" then break end
-  assert(a == "0123456789\n" and not b and not c)
+  assert(a == "0123456789\n" and b == nil and c == nil)
 end
 collectgarbage()   -- to close file in previous iteration
 
 io.output(file); io.write"00\n10\n20\n30\n40\n":close()
 for a, b in io.lines(file, "n", "n") do
-  if a == 40 then assert(not b)
+  if a == 40 then assert(b == nil)
   else assert(a == b - 10)
   end
 end
@@ -499,13 +410,13 @@ X
 -                                   y;
 ]]:close()
 _G.X = 1
-assert(not load((io.lines(file))))
+assert(not load(io.lines(file)))
 collectgarbage()   -- to close file in previous iteration
-load((io.lines(file, "L")))()
+load(io.lines(file, "L"))()
 assert(_G.X == 2)
-load((io.lines(file, 1)))()
+load(io.lines(file, 1))()
 assert(_G.X == 4)
-load((io.lines(file, 3)))()
+load(io.lines(file, 3))()
 assert(_G.X == 8)
 
 print('+')
@@ -654,7 +565,7 @@ and the rest of the file
 io.input(file)
 local _,a,b,c,d,e,h,__ = io.read(1, 'n', 'n', 'l', 'l', 'l', 'a', 10)
 assert(io.close(io.input()))
-assert(_ == ' ' and not __)
+assert(_ == ' ' and __ == nil)
 assert(type(a) == 'number' and a==123.4 and b==-56e-2)
 assert(d=='second line' and e=='third line')
 assert(h==[[
@@ -706,7 +617,7 @@ if not _soft then
   io.input():seek('set', 0)
   y = io.read()  -- huge line
   assert(x == y..'\n'..io.read())
-  assert(not io.read())
+  assert(io.read() == nil)
   io.close(io.input())
   assert(os.remove(file))
   x = nil; y = nil
@@ -715,27 +626,12 @@ end
 if not _port then
   local progname
   do  -- get name of running executable
-    local arg = arg or ARG
+    local arg = arg or _ARG
     local i = 0
     while arg[i] do i = i - 1 end
     progname = '"' .. arg[i + 1] .. '"'
   end
   print("testing popen/pclose and execute")
-  -- invalid mode for popen
-  checkerr("invalid mode", io.popen, "cat", "")
-  checkerr("invalid mode", io.popen, "cat", "r+")
-  checkerr("invalid mode", io.popen, "cat", "rw")
-  do  -- basic tests for popen
-    local file = os.tmpname()
-    local f = assert(io.popen("cat - > " .. file, "w"))
-    f:write("a line")
-    assert(f:close())
-    local f = assert(io.popen("cat - < " .. file, "r"))
-    assert(f:read("a") == "a line")
-    assert(f:close())
-    assert(os.remove(file))
-  end
-
   local tests = {
     -- command,   what,  code
     {"ls > /dev/null", "ok"},
@@ -790,24 +686,11 @@ assert(os.date(string.rep("%d", 1000), t) ==
        string.rep(os.date("%d", t), 1000))
 assert(os.date(string.rep("%", 200)) == string.rep("%", 100))
 
-local function checkDateTable (t)
-  _G.D = os.date("*t", t)
-  assert(os.time(D) == t)
-  load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
-    D.hour==%H and D.min==%M and D.sec==%S and
-    D.wday==%w+1 and D.yday==%j)]], t))()
-  _G.D = nil
-end
-
-checkDateTable(os.time())
-if not _port then
-  -- assume that time_t can represent these values
-  checkDateTable(0)
-  checkDateTable(1)
-  checkDateTable(1000)
-  checkDateTable(0x7fffffff)
-  checkDateTable(0x80000000)
-end
+local t = os.time()
+D = os.date("*t", t)
+load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
 
 checkerr("invalid conversion specifier", os.date, "%")
 checkerr("invalid conversion specifier", os.date, "%9")
@@ -821,24 +704,11 @@ checkerr("not an integer", os.time, {year=1000, month=1, day=1, hour=1.5})
 
 checkerr("missing", os.time, {hour = 12})   -- missing date
 
-
-if string.packsize("i") == 4 then   -- 4-byte ints
-  checkerr("field 'year' is out-of-bound", os.time,
-              {year = -(1 << 31) + 1899, month = 1, day = 1})
-end
-
 if not _port then
   -- test Posix-specific modifiers
   assert(type(os.date("%Ex")) == 'string')
   assert(type(os.date("%Oy")) == 'string')
 
-  -- test large dates (assume at least 4-byte ints and time_t)
-  local t0 = os.time{year = 1970, month = 1, day = 0}
-  local t1 = os.time{year = 1970, month = 1, day = 0, sec = (1 << 31) - 1}
-  assert(t1 - t0 == (1 << 31) - 1)
-  t0 = os.time{year = 1970, month = 1, day = 1}
-  t1 = os.time{year = 1970, month = 1, day = 1, sec = -(1 << 31)}
-  assert(t1 - t0 == -(1 << 31))
 
   -- test out-of-range dates (at least for Unix)
   if maxint >= 2^62 then  -- cannot do these tests in Small Lua
@@ -853,51 +723,34 @@ if not _port then
         -- time_t has 8 bytes; an int year cannot represent a huge time
         print("  8-byte time_t")
         checkerr("cannot be represented", os.date, "%Y", 2^60)
-
-        -- this is the maximum year
-        assert(tonumber(os.time
-          {year=(1 << 31) + 1899, month=12, day=31, hour=23, min=59, sec=59}))
-
-        -- this is too much
-        checkerr("represented", os.time,
-          {year=(1 << 31) + 1899, month=12, day=31, hour=23, min=59, sec=60})
+        -- it should have no problems with year 4000
+        assert(tonumber(os.time{year=4000, month=1, day=1}))
       end
-
-      -- internal 'int' fields cannot hold these values
-      checkerr("field 'day' is out-of-bound", os.time,
-                  {year = 0, month = 1, day = 2^32})
-
-      checkerr("field 'month' is out-of-bound", os.time,
-                  {year = 0, month = -((1 << 31) + 1), day = 1})
-
-      checkerr("field 'year' is out-of-bound", os.time,
-                  {year = (1 << 31) + 1900, month = 1, day = 1})
-
     else    -- 8-byte ints
       -- assume time_t has 8 bytes too
       print("  8-byte time_t")
       assert(tonumber(os.date("%Y", 2^60)))
-
       -- but still cannot represent a huge year
       checkerr("cannot be represented", os.time, {year=2^60, month=1, day=1})
     end
   end
 end
 
+
+D = os.date("!*t", t)
+load(os.date([[!assert(D.year==%Y and D.month==%m and D.day==%d and
+  D.hour==%H and D.min==%M and D.sec==%S and
+  D.wday==%w+1 and D.yday==%j and type(D.isdst) == 'boolean')]], t))()
+
 do
   local D = os.date("*t")
   local t = os.time(D)
-  if D.isdst == nil then
-    print("no daylight saving information")
-  else
-    assert(type(D.isdst) == 'boolean')
-  end
+  assert(type(D.isdst) == 'boolean')
   D.isdst = nil
   local t1 = os.time(D)
   assert(t == t1)   -- if isdst is absent uses correct default
 end
 
-local D = os.date("*t")
 t = os.time(D)
 D.year = D.year-1;
 local t1 = os.time(D)

testes/gc.lua

@@ -1,31 +1,18 @@
--- $Id: testes/gc.lua $
+-- $Id: gc.lua,v 1.72 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
-print('testing incremental garbage collection')
+print('testing garbage collection')
 
 local debug = require"debug"
 
-assert(collectgarbage("isrunning"))
-
 collectgarbage()
 
-local oldmode = collectgarbage("incremental")
+assert(collectgarbage("isrunning"))
 
--- changing modes should return previous mode
-assert(collectgarbage("generational") == "incremental")
-assert(collectgarbage("generational") == "generational")
-assert(collectgarbage("incremental") == "generational")
-assert(collectgarbage("incremental") == "incremental")
+local function gcinfo () return collectgarbage"count" * 1024 end
 
 
-local function nop () end
-
-local function gcinfo ()
-  return collectgarbage"count" * 1024
-end
-
-
--- test weird parameters to 'collectgarbage'
+-- test weird parameters
 do
   -- save original parameters
   local a = collectgarbage("setpause", 200)
@@ -50,13 +37,12 @@ end
 
 _G["while"] = 234
 
+limit = 5000
+
 
---
--- tests for GC activation when creating different kinds of objects
---
 local function GC1 ()
   local u
-  local b     -- (above 'u' it in the stack)
+  local b     -- must be declared after 'u' (to be above it in the stack)
   local finish = false
   u = setmetatable({}, {__gc = function () finish = true end})
   b = {34}
@@ -78,7 +64,7 @@ local function GC2 ()
   local u
   local finish = false
   u = {setmetatable({}, {__gc = function () finish = true end})}
-  local b = {34}
+  b = {34}
   repeat u = {{}} until finish
   assert(b[1] == 34)   -- 'u' was collected, but 'b' was not
 
@@ -96,38 +82,40 @@ end
 local function GC()  GC1(); GC2() end
 
 
-do
-  print("creating many objects")
-
-  local limit = 5000
-
-  for i = 1, limit do
-    local a = {}; a = nil
-  end
-
-  local a = "a"
-
-  for i = 1, limit do
-    a = i .. "b";
-    a = string.gsub(a, '(%d%d*)', "%1 %1")
-    a = "a"
-  end
-
-
-
-  a = {}
-
-  function a:test ()
-    for i = 1, limit do
-      load(string.format("function temp(a) return 'a%d' end", i), "")()
-      assert(temp() == string.format('a%d', i))
-    end
-  end
-
-  a:test()
+contCreate = 0
 
+print('tables')
+while contCreate <= limit do
+  local a = {}; a = nil
+  contCreate = contCreate+1
 end
 
+a = "a"
+
+contCreate = 0
+print('strings')
+while contCreate <= limit do
+  a = contCreate .. "b";
+  a = string.gsub(a, '(%d%d*)', string.upper)
+  a = "a"
+  contCreate = contCreate+1
+end
+
+
+contCreate = 0
+
+a = {}
+
+print('functions')
+function a:test ()
+  while contCreate <= limit do
+    load(string.format("function temp(a) return 'a%d' end", contCreate), "")()
+    assert(temp() == string.format('a%d', contCreate))
+    contCreate = contCreate+1
+  end
+end
+
+a:test()
 
 -- collection of functions without locals, globals, etc.
 do local f = function () end end
@@ -159,8 +147,9 @@ print('long strings')
 x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
 assert(string.len(x)==80)
 s = ''
+n = 0
 k = math.min(300, (math.maxinteger // 80) // 2)
-for n = 1, k do s = s..x; j=tostring(n)  end
+while n < k do s = s..x; n=n+1; j=tostring(n)  end
 assert(string.len(s) == k*80)
 s = string.sub(s, 1, 10000)
 s, i = string.gsub(s, '(%d%d%d%d)', '')
@@ -171,50 +160,49 @@ x = nil
 assert(_G["while"] == 234)
 
 
---
--- test the "size" of basic GC steps (whatever they mean...)
---
-do
 print("steps")
 
-  print("steps (2)")
-
-  local function dosteps (siz)
-    collectgarbage()
-    local a = {}
-    for i=1,100 do a[i] = {{}}; local b = {} end
-    local x = gcinfo()
-    local i = 0
-    repeat   -- do steps until it completes a collection cycle
-      i = i+1
-    until collectgarbage("step", siz)
-    assert(gcinfo() < x)
-    return i    -- number of steps
-  end
-
-  collectgarbage"stop"
-
-  if not _port then
-    assert(dosteps(10) < dosteps(2))
-  end
-
-  -- collector should do a full collection with so many steps
-  assert(dosteps(20000) == 1)
-  assert(collectgarbage("step", 20000) == true)
-  assert(collectgarbage("step", 20000) == true)
+print("steps (2)")
 
+local function dosteps (siz)
   assert(not collectgarbage("isrunning"))
-  collectgarbage"restart"
-  assert(collectgarbage("isrunning"))
-
+  collectgarbage()
+  assert(not collectgarbage("isrunning"))
+  local a = {}
+  for i=1,100 do a[i] = {{}}; local b = {} end
+  local x = gcinfo()
+  local i = 0
+  repeat   -- do steps until it completes a collection cycle
+    i = i+1
+  until collectgarbage("step", siz)
+  assert(gcinfo() < x)
+  return i
 end
 
+collectgarbage"stop"
+
+if not _port then
+  -- test the "size" of basic GC steps (whatever they mean...)
+  assert(dosteps(0) > 10)
+  assert(dosteps(10) < dosteps(2))
+end
+
+-- collector should do a full collection with so many steps
+assert(dosteps(20000) == 1)
+assert(collectgarbage("step", 20000) == true)
+assert(collectgarbage("step", 20000) == true)
+
+assert(not collectgarbage("isrunning"))
+collectgarbage"restart"
+assert(collectgarbage("isrunning"))
+
 
 if not _port then
   -- test the pace of the collector
   collectgarbage(); collectgarbage()
   local x = gcinfo()
   collectgarbage"stop"
+  assert(not collectgarbage("isrunning"))
   repeat
     local a = {}
   until gcinfo() > 3 * x
@@ -235,7 +223,7 @@ b = {}
 for k,v in pairs(a) do b[k]=v end
 -- remove all indices and collect them
 for n in pairs(b) do
-  a[n] = undef
+  a[n] = nil
   assert(type(n) == 'table' and next(n) == nil)
   collectgarbage()
 end
@@ -262,7 +250,7 @@ a = {}; setmetatable(a, {__mode = 'v'});
 a[1] = string.rep('b', 21)
 collectgarbage()
 assert(a[1])   -- strings are *values*
-a[1] = undef
+a[1] = nil
 -- fill a with some `collectable' values (in both parts of the table)
 for i=1,lim do a[i] = {} end
 for i=1,lim do a[i..'x'] = {} end
@@ -274,7 +262,7 @@ local i = 0
 for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
 assert(i == 2*lim)
 
-a = {}; setmetatable(a, {__mode = 'kv'});
+a = {}; setmetatable(a, {__mode = 'vk'});
 local x, y, z = {}, {}, {}
 -- keep only some items
 a[1], a[2], a[3] = x, y, z
@@ -330,7 +318,7 @@ while n do n = a[n].k[1]; i = i + 1 end
 assert(i == 100)
 x = nil
 GC()
-for i = 1, 4 do assert(a[i][1] == i * 10); a[i] = undef end
+for i = 1, 4 do assert(a[i][1] == i * 10); a[i] = nil end
 assert(next(a) == nil)
 
 local K = {}
@@ -353,38 +341,40 @@ GC()
 
 
 -- testing errors during GC
-if T then
-  collectgarbage("stop")   -- stop collection
-  local u = {}
-  local s = {}; setmetatable(s, {__mode = 'k'})
-  setmetatable(u, {__gc = function (o)
-    local i = s[o]
-    s[i] = true
-    assert(not s[i - 1])   -- check proper finalization order
-    if i == 8 then error("@expected@") end   -- error during GC
-  end})
+do
+collectgarbage("stop")   -- stop collection
+local u = {}
+local s = {}; setmetatable(s, {__mode = 'k'})
+setmetatable(u, {__gc = function (o)
+  local i = s[o]
+  s[i] = true
+  assert(not s[i - 1])   -- check proper finalization order
+  if i == 8 then error("here") end   -- error during GC
+end})
 
-  for i = 6, 10 do
-    local n = setmetatable({}, getmetatable(u))
-    s[n] = i
-  end
+for i = 6, 10 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
 
-  warn("@on"); warn("@store")
-  collectgarbage()
-  assert(string.find(_WARN, "error in __gc metamethod"))
-  assert(string.match(_WARN, "@(.-)@") == "expected"); _WARN = false
-  for i = 8, 10 do assert(s[i]) end
+assert(not pcall(collectgarbage))
+for i = 8, 10 do assert(s[i]) end
 
-  for i = 1, 5 do
-    local n = setmetatable({}, getmetatable(u))
-    s[n] = i
-  end
+for i = 1, 5 do
+  local n = setmetatable({}, getmetatable(u))
+  s[n] = i
+end
 
-  collectgarbage()
-  for i = 1, 10 do assert(s[i]) end
+collectgarbage()
+for i = 1, 10 do assert(s[i]) end
 
-  getmetatable(u).__gc = nil
-  warn("@normal")
+getmetatable(u).__gc = false
+
+
+-- __gc errors with non-string messages
+setmetatable({}, {__gc = function () error{} end})
+local a, b = pcall(collectgarbage)
+assert(not a and type(b) == "string" and string.find(b, "error in __gc"))
 
 end
 print '+'
@@ -416,7 +406,7 @@ else
     local u = u
     getmetatable(u).__gc = function (o)
       assert(a[o] == 10-s)
-      assert(a[10-s] == undef) -- udata already removed from weak table
+      assert(a[10-s] == nil) -- udata already removed from weak table
       assert(getmetatable(o) == getmetatable(u))
     assert(getmetatable(o).a[o] == 10-s)
       s=s+1
@@ -450,49 +440,19 @@ u, m = nil
 collectgarbage()
 assert(m==10)
 
-do   -- tests for string keys in weak tables
-  collectgarbage(); collectgarbage()
-  local m = collectgarbage("count")         -- current memory
-  local a = setmetatable({}, {__mode = "kv"})
-  a[string.rep("a", 2^22)] = 25   -- long string key -> number value
-  a[string.rep("b", 2^22)] = {}   -- long string key -> colectable value
-  a[{}] = 14                     -- colectable key
-  assert(collectgarbage("count") > m + 2^13)    -- 2^13 == 2 * 2^22 in KB
-  collectgarbage()
-  assert(collectgarbage("count") >= m + 2^12 and
-        collectgarbage("count") < m + 2^13)    -- one key was collected
-  local k, v = next(a)   -- string key with number value preserved
-  assert(k == string.rep("a", 2^22) and v == 25)
-  assert(next(a, k) == nil)  -- everything else cleared
-  assert(a[string.rep("b", 2^22)] == undef)
-  a[k] = undef        -- erase this last entry
-  k = nil
-  collectgarbage()
-  assert(next(a) == nil)
-  -- make sure will not try to compare with dead key
-  assert(a[string.rep("b", 100)] == undef)
-  assert(collectgarbage("count") <= m + 1)   -- eveything collected
-end
-
 
 -- errors during collection
-if T then
-  warn("@store")
-  u = setmetatable({}, {__gc = function () error "@expected error" end})
-  u = nil
-  collectgarbage()
-  assert(string.find(_WARN, "@expected error")); _WARN = false
-  warn("@normal")
-end
+u = setmetatable({}, {__gc = function () error "!!!" end})
+u = nil
+assert(not pcall(collectgarbage))
 
 
 if not _soft then
-  print("long list")
+  print("deep structures")
   local a = {}
   for i = 1,200000 do
     a = {next = a}
   end
-  a = nil
   collectgarbage()
 end
 
@@ -525,7 +485,7 @@ do
   local collected = false   -- to detect collection
   collectgarbage(); collectgarbage("stop")
   do
-    local function f (param)
+    local function f (param) 
       ;(function ()
         assert(type(f) == 'function' and type(param) == 'thread')
         param = {param, f}
@@ -536,7 +496,10 @@ do
     local co = coroutine.create(f)
     assert(coroutine.resume(co, co))
   end
-  -- Now, thread and closure are not reacheable any more.
+  -- Now, thread and closure are not reacheable any more;
+  -- two collections are needed to break cycle
+  collectgarbage()
+  assert(not collected)
   collectgarbage()
   assert(collected)
   collectgarbage("restart")
@@ -546,10 +509,10 @@ end
 do
   collectgarbage()
   collectgarbage"stop"
-  collectgarbage("step", 0)   -- steps should not unblock the collector
   local x = gcinfo()
   repeat
-    for i=1,1000 do _ENV.a = {} end   -- no collection during the loop
+    for i=1,1000 do _ENV.a = {} end
+    collectgarbage("step", 0)   -- steps should not unblock the collector
   until gcinfo() > 2 * x
   collectgarbage"restart"
 end
@@ -580,18 +543,17 @@ if T then   -- tests for weird cases collecting upvalues
 
   collectgarbage("restart")
 
-  -- test barrier in sweep phase (backing userdata to gray)
-  local u = T.newuserdata(0, 1)   -- create a userdata
+  -- test barrier in sweep phase (advance cleaning of upvalue to white)
+  local u = T.newuserdata(0)   -- create a userdata
   collectgarbage()
   collectgarbage"stop"
-  local a = {}     -- avoid 'u' as first element in 'allgc'
   T.gcstate"atomic"
   T.gcstate"sweepallgc"
   local x = {}
-  assert(T.gccolor(u) == "black")   -- userdata is "old" (black)
+  assert(T.gccolor(u) == "black")   -- upvalue is "old" (black)
   assert(T.gccolor(x) == "white")   -- table is "new" (white)
   debug.setuservalue(u, x)          -- trigger barrier
-  assert(T.gccolor(u) == "gray")   -- userdata changed back to gray
+  assert(T.gccolor(u) == "white")   -- upvalue changed to white
   collectgarbage"restart"
 
   print"+"
@@ -603,8 +565,8 @@ if T then
   collectgarbage("stop")
   local x = T.newuserdata(0)
   local y = T.newuserdata(0)
-  debug.setmetatable(y, {__gc = nop})   -- bless the new udata before...
-  debug.setmetatable(x, {__gc = nop})   -- ...the old one
+  debug.setmetatable(y, {__gc = true})   -- bless the new udata before...
+  debug.setmetatable(x, {__gc = true})   -- ...the old one
   assert(T.gccolor(y) == "white")
   T.checkmemory()
   collectgarbage("restart")
@@ -630,7 +592,6 @@ if T then
   assert(T.totalmem("thread") == t + 1)
 end
 
-
 -- create an object to be collected when state is closed
 do
   local setmetatable,assert,type,print,getmetatable =
@@ -640,7 +601,7 @@ do
     assert(getmetatable(o) == tt)
     -- create new objects during GC
     local a = 'xuxu'..(10+3)..'joao', {}
-    ___Glob = o  -- ressurrect object!
+    ___Glob = o  -- ressurect object!
     setmetatable({}, tt)  -- creates a new one with same metatable
     print(">>> closing state " .. "<<<\n")
   end
@@ -649,41 +610,15 @@ do
 end
 
 -- create several objects to raise errors when collected while closing state
-if T then
-  local error, assert, find, warn = error, assert, string.find, warn
-  local n = 0
-  local lastmsg
-  local mt = {__gc = function (o)
-    n = n + 1
-    assert(n == o[1])
-    if n == 1 then
-      _WARN = false
-    elseif n == 2 then
-      assert(find(_WARN, "@expected warning"))
-      lastmsg = _WARN    -- get message from previous error (first 'o')
-    else
-      assert(lastmsg == _WARN)  -- subsequent error messages are equal
-    end
-    warn("@store"); _WARN = false
-    error"@expected warning"
-  end}
-  for i = 10, 1, -1 do
+do
+  local mt = {__gc = function (o) return o + 1 end}
+  for i = 1,10 do
     -- create object and preserve it until the end
-    table.insert(___Glob, setmetatable({i}, mt))
+    table.insert(___Glob, setmetatable({}, mt))
   end
 end
 
 -- just to make sure
 assert(collectgarbage'isrunning')
 
-do    -- check that the collector is reentrant in incremental mode
-  setmetatable({}, {__gc = function ()
-    collectgarbage()
-  end})
-  collectgarbage()
-end
-
-
-collectgarbage(oldmode)
-
 print('OK')

testes/gengc.lua

@@ -1,172 +0,0 @@
--- $Id: testes/gengc.lua $
--- See Copyright Notice in file all.lua
-
-print('testing generational garbage collection')
-
-local debug = require"debug"
-
-assert(collectgarbage("isrunning"))
-
-collectgarbage()
-
-local oldmode = collectgarbage("generational")
-
-
--- ensure that table barrier evolves correctly
-do
-  local U = {}
-  -- full collection makes 'U' old
-  collectgarbage()
-  assert(not T or T.gcage(U) == "old")
-
-  -- U refers to a new table, so it becomes 'touched1'
-  U[1] = {x = {234}}
-  assert(not T or (T.gcage(U) == "touched1" and T.gcage(U[1]) == "new"))
-
-  -- both U and the table survive one more collection
-  collectgarbage("step", 0)
-  assert(not T or (T.gcage(U) == "touched2" and T.gcage(U[1]) == "survival"))
-
-  -- both U and the table survive yet another collection
-  -- now everything is old
-  collectgarbage("step", 0)
-  assert(not T or (T.gcage(U) == "old" and T.gcage(U[1]) == "old1"))
-
-  -- data was not corrupted
-  assert(U[1].x[1] == 234)
-end
-
-
-do
-  -- ensure that 'firstold1' is corrected when object is removed from
-  -- the 'allgc' list
-  local function foo () end
-  local old = {10}
-  collectgarbage()    -- make 'old' old
-  assert(not T or T.gcage(old) == "old")
-  setmetatable(old, {})    -- new table becomes OLD0 (barrier)
-  assert(not T or T.gcage(getmetatable(old)) == "old0")
-  collectgarbage("step", 0)   -- new table becomes OLD1 and firstold1
-  assert(not T or T.gcage(getmetatable(old)) == "old1")
-  setmetatable(getmetatable(old), {__gc = foo})  -- get it out of allgc list
-  collectgarbage("step", 0)   -- should not seg. fault
-end
-
-
-do   -- bug in 5.4.0
--- When an object aged OLD1 is finalized, it is moved from the list
--- 'finobj' to the *beginning* of the list 'allgc', but that part of the
--- list was not being visited by 'markold'.
-  local A = {}
-  A[1] = false     -- old anchor for object
-
-  -- obj finalizer
-  local function gcf (obj)
-    A[1] = obj     -- anchor object
-    assert(not T or T.gcage(obj) == "old1")
-    obj = nil      -- remove it from the stack
-    collectgarbage("step", 0)   -- do a young collection
-    print(getmetatable(A[1]).x)   -- metatable was collected
-  end
-
-  collectgarbage()   -- make A old
-  local obj = {}     -- create a new object
-  collectgarbage("step", 0)   -- make it a survival
-  assert(not T or T.gcage(obj) == "survival")
-  setmetatable(obj, {__gc = gcf, x = "+"})   -- create its metatable
-  assert(not T or T.gcage(getmetatable(obj)) == "new")
-  obj = nil   -- clear object
-  collectgarbage("step", 0)   -- will call obj's finalizer
-end
-
-
-do   -- another bug in 5.4.0
-  local old = {10}
-  collectgarbage()   -- make 'old' old
-  local co = coroutine.create(
-    function ()
-      local x = nil
-      local f = function ()
-                  return x[1]
-                end
-      x = coroutine.yield(f)
-      coroutine.yield()
-    end
-  )
-  local _, f = coroutine.resume(co)   -- create closure over 'x' in coroutine
-  collectgarbage("step", 0)   -- make upvalue a survival
-  old[1] = {"hello"}    -- 'old' go to grayagain as 'touched1'
-  coroutine.resume(co, {123})     -- its value will be new
-  co = nil
-  collectgarbage("step", 0)   -- hit the barrier
-  assert(f() == 123 and old[1][1] == "hello")
-  collectgarbage("step", 0)   -- run the collector once more
-  -- make sure old[1] was not collected
-  assert(f() == 123 and old[1][1] == "hello")
-end
-
-
-do   -- bug introduced in commit 9cf3299fa
-  local t = setmetatable({}, {__mode = "kv"})   -- all-weak table
-  collectgarbage()   -- full collection
-  assert(not T or T.gcage(t) == "old")
-  t[1] = {10}
-  assert(not T or (T.gcage(t) == "touched1" and T.gccolor(t) == "gray"))
-  collectgarbage("step", 0)   -- minor collection
-  assert(not T or (T.gcage(t) == "touched2" and T.gccolor(t) == "black"))
-  collectgarbage("step", 0)   -- minor collection
-  assert(not T or T.gcage(t) == "old")   -- t should be black, but it was gray
-  t[1] = {10}      -- no barrier here, so t was still old
-  collectgarbage("step", 0)   -- minor collection
-  -- t, being old, is ignored by the collection, so it is not cleared
-  assert(t[1] == nil)   -- fails with the bug
-end
-
-
-if T == nil then
-  (Message or print)('\n >>> testC not active: \z
-                             skipping some generational tests <<<\n')
-  print 'OK'
-  return
-end
-
-
--- ensure that userdata barrier evolves correctly
-do
-  local U = T.newuserdata(0, 1)
-  -- full collection makes 'U' old
-  collectgarbage()
-  assert(T.gcage(U) == "old")
-
-  -- U refers to a new table, so it becomes 'touched1'
-  debug.setuservalue(U, {x = {234}})
-  assert(T.gcage(U) == "touched1" and
-         T.gcage(debug.getuservalue(U)) == "new")
-
-  -- both U and the table survive one more collection
-  collectgarbage("step", 0)
-  assert(T.gcage(U) == "touched2" and
-         T.gcage(debug.getuservalue(U)) == "survival")
-
-  -- both U and the table survive yet another collection
-  -- now everything is old
-  collectgarbage("step", 0)
-  assert(T.gcage(U) == "old" and
-         T.gcage(debug.getuservalue(U)) == "old1")
-
-  -- data was not corrupted
-  assert(debug.getuservalue(U).x[1] == 234)
-end
-
--- just to make sure
-assert(collectgarbage'isrunning')
-
-
-
--- just to make sure
-assert(collectgarbage'isrunning')
-
-collectgarbage(oldmode)
-
-print('OK')
-

testes/goto.lua

@@ -1,4 +1,4 @@
--- $Id: testes/goto.lua $
+-- $Id: goto.lua,v 1.13 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 collectgarbage()
@@ -14,7 +14,6 @@ errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
 
 -- repeated label
 errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
-errmsg([[ ::l1:: do ::l1:: end]], "label 'l1'")
 
 
 -- undefined label
@@ -68,6 +67,8 @@ do
   assert(assert(load(prog))() == 31)
 end
 
+-- goto to correct label when nested
+do goto l3; ::l3:: end   -- does not loop jumping to previous label 'l3'
 
 -- ok to jump over local dec. to end of block
 do
@@ -127,30 +128,6 @@ do   -- bug in 5.2 -> 5.3.2
   assert(x == 2 and y == true)
 end
 
--- bug in 5.3
-do
-  local first = true
-  local a = false
-  if true then
-    goto LBL
-    ::loop::
-    a = true
-    ::LBL::
-    if first then
-      first = false
-      goto loop
-    end
-  end
-  assert(a)
-end
-
-do   -- compiling infinite loops
-  goto escape   -- do not run the infinite loops
-  ::a:: goto a
-  ::b:: goto c
-  ::c:: goto b
-end
-::escape::
 --------------------------------------------------------------------------------
 -- testing closing of upvalues
 
@@ -249,22 +226,6 @@ assert(testG(2) == "2")
 assert(testG(3) == "3")
 assert(testG(4) == 5)
 assert(testG(5) == 10)
-
-do
-  -- if x back goto out of scope of upvalue
-  local X
-  goto L1
-
-  ::L2:: goto L3
-
-  ::L1:: do
-    local a <close> = setmetatable({}, {__close = function () X = true end})
-    assert(X == nil)
-    if a then goto L2 end   -- jumping back out of scope of 'a'
-  end
-
-  ::L3:: assert(X == true)   -- checks that 'a' was correctly closed
-end
 --------------------------------------------------------------------------------
 
 

testes/heavy.lua

@@ -1,32 +1,30 @@
--- $Id: heavy.lua,v 1.7 2017/12/29 15:42:15 roberto Exp $
+-- $Id: heavy.lua,v 1.4 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
-local function teststring ()
-  print("creating a string too long")
-  do
+print("creating a string too long")
+do
+  local st, msg = pcall(function ()
     local a = "x"
-    local st, msg = pcall(function ()
-      while true do
-        a = a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
-         print(string.format("string with %d bytes", #a))
-      end
-    end)
-    assert(not st and
-      (string.find(msg, "string length overflow") or
-       string.find(msg, "not enough memory")))
-    print("string length overflow with " .. #a * 100)
-  end
-  print('+')
+    while true do
+      a = a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       .. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
+       print(string.format("string with %d bytes", #a))
+    end
+  end)
+  assert(not st and
+    (string.find(msg, "string length overflow") or
+     string.find(msg, "not enough memory")))
 end
+print('+')
+
 
 local function loadrep (x, what)
   local p = 1<<20
@@ -35,139 +33,40 @@ local function loadrep (x, what)
   local function f()
     count = count + p
     if count % (0x80*p) == 0 then
-      io.stderr:write("(", count // 2^20, " M)")
+      io.stderr:write("(", string.format("0x%x", count), ")")
     end
     return s
   end
   local st, msg = load(f, "=big")
-  print("\nmemory: ", collectgarbage'count' * 1024)
-  msg = string.match(msg, "^[^\n]+")    -- get only first line
-  print(string.format("total: 0x%x %s ('%s')", count, what, msg))
+  print(string.format("\ntotal: 0x%x %s", count, what))
   return st, msg
 end
 
 
-function controlstruct ()
-  print("control structure too long")
-  local lim = ((1 << 24) - 2) // 3
-  local s = string.rep("a = a + 1\n", lim)
-  s = "while true do " .. s .. "end"
-  assert(load(s))
-  print("ok with " .. lim .. " lines")
-  lim = lim + 3
-  s = string.rep("a = a + 1\n", lim)
-  s = "while true do " .. s .. "end"
-  local st, msg = load(s)
-  assert(not st and string.find(msg, "too long"))
-  print(msg)
-end
-
-
-function manylines ()
-  print("loading chunk with too many lines")
+print("loading chunk with too many lines")
+do
   local st, msg = loadrep("\n", "lines")
   assert(not st and string.find(msg, "too many lines"))
-  print('+')
 end
+print('+')
 
 
-function hugeid ()
-  print("loading chunk with huge identifier")
+print("loading chunk with huge identifier")
+do
   local st, msg = loadrep("a", "chars")
   assert(not st and 
     (string.find(msg, "lexical element too long") or
      string.find(msg, "not enough memory")))
-  print('+')
 end
+print('+')
 
-function toomanyinst ()
-  print("loading chunk with too many instructions")
+
+print("loading chunk with too many instructions")
+do
   local st, msg = loadrep("a = 10; ", "instructions")
-  print('+')
+  print(st, msg)
 end
+print('+')
 
 
-local function loadrepfunc (prefix, f)
-  local count = -1
-  local function aux ()
-    count = count + 1
-    if count == 0 then
-      return prefix
-    else
-      if count % (0x100000) == 0 then
-        io.stderr:write("(", count // 2^20, " M)")
-      end
-      return f(count)
-    end
-  end
-  local st, msg = load(aux, "k")
-  print("\nmemory: ", collectgarbage'count' * 1024)
-  msg = string.match(msg, "^[^\n]+")    -- get only first line
-  print("expected error: ", msg)
-end
-
-
-function toomanyconst ()
-  print("loading function with too many constants")
-  loadrepfunc("function foo () return {0,",
-      function (n)
-        -- convert 'n' to a string in the format [["...",]],
-        -- where '...' is a kind of number in base 128
-        -- (in a range that does not include either the double quote
-        -- and the escape.)
-        return string.char(34,
-          ((n // 128^0) & 127) + 128,
-          ((n // 128^1) & 127) + 128,
-          ((n // 128^2) & 127) + 128,
-          ((n // 128^3) & 127) + 128,
-          ((n // 128^4) & 127) + 128,
-          34, 44)
-      end)
-end
-
-
-function toomanystr ()
-  local a = {}
-  local st, msg = pcall(function ()
-    for i = 1, math.huge do
-      if i % (0x100000) == 0 then
-        io.stderr:write("(", i // 2^20, " M)")
-      end
-      a[i] = string.pack("I", i)
-     end
-  end)
-  local size = #a
-  a = collectgarbage'count'
-  print("\nmemory:", a * 1024)
-  print("expected error:", msg)
-  print("size:", size)
-end
-
-
-function toomanyidx ()
-  local a = {}
-  local st, msg = pcall(function ()
-    for i = 1, math.huge do
-      if i % (0x100000) == 0 then
-        io.stderr:write("(", i // 2^20, " M)")
-      end
-      a[i] = i
-     end
-  end)
-  print("\nmemory: ", collectgarbage'count' * 1024)
-  print("expected error: ", msg)
-  print("size:", #a)
-end
-  
-
-
--- teststring()
--- controlstruct()
--- manylines()
--- hugeid()
--- toomanyinst()
--- toomanyconst()
--- toomanystr()
-toomanyidx()
-
 print "OK"

testes/libs/lib22.c

@@ -1,25 +0,0 @@
-#include "lua.h"
-#include "lauxlib.h"
-
-static int id (lua_State *L) {
-  lua_pushboolean(L, 1);
-  lua_insert(L, 1);
-  return lua_gettop(L);
-}
-
-
-static const struct luaL_Reg funcs[] = {
-  {"id", id},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_lib2 (lua_State *L) {
-  lua_settop(L, 2);
-  lua_setglobal(L, "y");  /* y gets 2nd parameter */
-  lua_setglobal(L, "x");  /* x gets 1st parameter */
-  luaL_newlib(L, funcs);
-  return 1;
-}
-
-

testes/libs/makefile

@@ -9,19 +9,18 @@ CFLAGS = -Wall -std=gnu99 -O2 -I$(LUA_DIR) -fPIC -shared
 
 # libraries used by the tests
 all: lib1.so lib11.so lib2.so lib21.so lib2-v2.so
-	touch all
 
-lib1.so: lib1.c $(LUA_DIR)/luaconf.h
+lib1.so: lib1.c
 	$(CC) $(CFLAGS) -o lib1.so lib1.c
 
-lib11.so: lib11.c $(LUA_DIR)/luaconf.h
+lib11.so: lib11.c
 	$(CC) $(CFLAGS) -o lib11.so lib11.c
 
-lib2.so: lib2.c $(LUA_DIR)/luaconf.h
+lib2.so: lib2.c
 	$(CC) $(CFLAGS) -o lib2.so lib2.c
 
-lib21.so: lib21.c $(LUA_DIR)/luaconf.h
+lib21.so: lib21.c
 	$(CC) $(CFLAGS) -o lib21.so lib21.c
 
-lib2-v2.so: lib21.c $(LUA_DIR)/luaconf.h
-	$(CC) $(CFLAGS) -o lib2-v2.so lib22.c
+lib2-v2.so: lib2.so
+	mv lib2.so ./lib2-v2.so

testes/literals.lua

@@ -1,4 +1,4 @@
--- $Id: testes/literals.lua $
+-- $Id: literals.lua,v 1.36 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing scanner')
@@ -56,23 +56,16 @@ assert("abc\z
 assert("\u{0}\u{00000000}\x00\0" == string.char(0, 0, 0, 0))
 
 -- limits for 1-byte sequences
-assert("\u{0}\u{7F}" == "\x00\x7F")
+assert("\u{0}\u{7F}" == "\x00\z\x7F")
 
 -- limits for 2-byte sequences
-assert("\u{80}\u{7FF}" == "\xC2\x80\xDF\xBF")
+assert("\u{80}\u{7FF}" == "\xC2\x80\z\xDF\xBF")
 
 -- limits for 3-byte sequences
-assert("\u{800}\u{FFFF}" ==   "\xE0\xA0\x80\xEF\xBF\xBF")
+assert("\u{800}\u{FFFF}" ==   "\xE0\xA0\x80\z\xEF\xBF\xBF")
 
 -- limits for 4-byte sequences
-assert("\u{10000}\u{1FFFFF}" == "\xF0\x90\x80\x80\xF7\xBF\xBF\xBF")
-
--- limits for 5-byte sequences
-assert("\u{200000}\u{3FFFFFF}" == "\xF8\x88\x80\x80\x80\xFB\xBF\xBF\xBF\xBF")
-
--- limits for 6-byte sequences
-assert("\u{4000000}\u{7FFFFFFF}" ==
-       "\xFC\x84\x80\x80\x80\x80\xFD\xBF\xBF\xBF\xBF\xBF")
+assert("\u{10000}\u{10FFFF}" == "\xF0\x90\x80\x80\z\xF4\x8F\xBF\xBF")
 
 
 -- Error in escape sequences
@@ -101,7 +94,7 @@ lexerror([["xyz\300"]], [[\300"]])
 lexerror([["   \256"]], [[\256"]])
 
 -- errors in UTF-8 sequences
-lexerror([["abc\u{100000000}"]], [[abc\u{100000000]])   -- too large
+lexerror([["abc\u{110000}"]], [[abc\u{110000]])   -- too large
 lexerror([["abc\u11r"]], [[abc\u1]])    -- missing '{'
 lexerror([["abc\u"]], [[abc\u"]])    -- missing '{'
 lexerror([["abc\u{11r"]], [[abc\u{11r]])    -- missing '}'
@@ -281,7 +274,7 @@ if os.setlocale("pt_BR") or os.setlocale("ptb") then
 
   assert(" 0x.1 " + " 0x,1" + "-0X.1\t" == 0x0.1)
 
-  assert(not tonumber"inf" and not tonumber"NAN")
+  assert(tonumber"inf" == nil and tonumber"NAN" == nil)
 
   assert(assert(load(string.format("return %q", 4.51)))() == 4.51)
 
@@ -306,13 +299,4 @@ assert(not load"a = 'non-ending string\n'")
 assert(not load"a = '\\345'")
 assert(not load"a = [=x]")
 
-local function malformednum (n, exp)
-  local s, msg = load("return " .. n)
-  assert(not s and string.find(msg, exp))
-end
-
-malformednum("0xe-", "near <eof>")
-malformednum("0xep-p", "malformed number")
-malformednum("1print()", "malformed number")
-
 print('OK')

testes/locals.lua

@@ -1,12 +1,10 @@
--- $Id: testes/locals.lua $
+-- $Id: locals.lua,v 1.37 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing local variables and environments')
 
 local debug = require"debug"
 
-local tracegc = require"tracegc"
-
 
 -- bug in 5.1:
 
@@ -84,7 +82,7 @@ assert(c.a == nil)
 f()
 assert(c.a == 3)
 
--- old test for limits for special instructions
+-- old test for limits for special instructions (now just a generic test)
 do
   local i = 2
   local p = 4    -- p == 2^i
@@ -107,39 +105,20 @@ end
 print'+'
 
 
-if rawget(_G, "T") then
+if rawget(_G, "querytab") then
   -- testing clearing of dead elements from tables
   collectgarbage("stop")   -- stop GC
-  local a = {[{}] = 4, [3] = 0, alo = 1,
+  local a = {[{}] = 4, [3] = 0, alo = 1, 
              a1234567890123456789012345678901234567890 = 10}
 
-  local t = T.querytab(a)
+  local t = querytab(a)
 
-  for k,_ in pairs(a) do a[k] = undef end
-  collectgarbage()   -- restore GC and collect dead fields in 'a'
+  for k,_ in pairs(a) do a[k] = nil end
+  collectgarbage()   -- restore GC and collect dead fiels in `a'
   for i=0,t-1 do
     local k = querytab(a, i)
     assert(k == nil or type(k) == 'number' or k == 'alo')
   end
-
-  -- testing allocation errors during table insertions
-  local a = {}
-  local function additems ()
-    a.x = true; a.y = true; a.z = true
-    a[1] = true
-    a[2] = true
-  end
-  for i = 1, math.huge do
-    T.alloccount(i)
-    local st, msg = pcall(additems)
-    T.alloccount()
-    local count = 0
-    for k, v in pairs(a) do
-      assert(a[k] == v)
-      count = count + 1
-    end
-    if st then assert(count == 5); break end
-  end
 end
 
 
@@ -175,876 +154,6 @@ end
 assert(x==20)
 
 
-do   -- constants
-  local a<const>, b, c<const> = 10, 20, 30
-  b = a + c + b    -- 'b' is not constant
-  assert(a == 10 and b == 60 and c == 30)
-  local function checkro (name, code)
-    local st, msg = load(code)
-    local gab = string.format("attempt to assign to const variable '%s'", name)
-    assert(not st and string.find(msg, gab))
-  end
-  checkro("y", "local x, y <const>, z = 10, 20, 30; x = 11; y = 12")
-  checkro("x", "local x <const>, y, z <const> = 10, 20, 30; x = 11")
-  checkro("z", "local x <const>, y, z <const> = 10, 20, 30; y = 10; z = 11")
-
-  checkro("z", [[
-    local a, z <const>, b = 10;
-    function foo() a = 20; z = 32; end
-  ]])
-
-  checkro("var1", [[
-    local a, var1 <const> = 10;
-    function foo() a = 20; z = function () var1 = 12; end  end
-  ]])
-end
-
-
-print"testing to-be-closed variables"
-
-local function stack(n) n = ((n == 0) or stack(n - 1)) end
-
-local function func2close (f, x, y)
-  local obj = setmetatable({}, {__close = f})
-  if x then
-    return x, obj, y
-  else
-    return obj
-  end
-end
-
-
-do
-  local a = {}
-  do
-    local b <close> = false   -- not to be closed
-    local x <close> = setmetatable({"x"}, {__close = function (self)
-                                                   a[#a + 1] = self[1] end})
-    local w, y <close>, z = func2close(function (self, err)
-                                assert(err == nil); a[#a + 1] = "y"
-                              end, 10, 20)
-    local c <close> = nil  -- not to be closed
-    a[#a + 1] = "in"
-    assert(w == 10 and z == 20)
-  end
-  a[#a + 1] = "out"
-  assert(a[1] == "in" and a[2] == "y" and a[3] == "x" and a[4] == "out")
-end
-
-do
-  local X = false
-
-  local x, closescope = func2close(function (_, msg)
-    stack(10);
-    assert(msg == nil)
-    X = true
-  end, 100)
-  assert(x == 100);  x = 101;   -- 'x' is not read-only
-
-  -- closing functions do not corrupt returning values
-  local function foo (x)
-    local _ <close> = closescope
-    return x, X, 23
-  end
-
-  local a, b, c = foo(1.5)
-  assert(a == 1.5 and b == false and c == 23 and X == true)
-
-  X = false
-  foo = function (x)
-    local _<close> = func2close(function (_, msg)
-      -- without errors, enclosing function should be still active when
-      -- __close is called
-      assert(debug.getinfo(2).name == "foo")
-      assert(msg == nil)
-    end)
-    local  _<close> = closescope
-    local y = 15
-    return y
-  end
-
-  assert(foo() == 15 and X == true)
-
-  X = false
-  foo = function ()
-    local x <close> = closescope
-    return x
-  end
-
-  assert(foo() == closescope and X == true)
-
-end
-
-
--- testing to-be-closed x compile-time constants
--- (there were some bugs here in Lua 5.4-rc3, due to a confusion
--- between compile levels and stack levels of variables)
-do
-  local flag = false
-  local x = setmetatable({},
-    {__close = function() assert(flag == false); flag = true end})
-  local y <const> = nil
-  local z <const> = nil
-  do
-      local a <close> = x
-  end
-  assert(flag)   -- 'x' must be closed here
-end
-
-do
-  -- similar problem, but with implicit close in for loops
-  local flag = false
-  local x = setmetatable({},
-    {__close = function () assert(flag == false); flag = true end})
-  -- return an empty iterator, nil, nil, and 'x' to be closed
-  local function a ()
-    return (function () return nil end), nil, nil, x
-  end
-  local v <const> = 1
-  local w <const> = 1
-  local x <const> = 1
-  local y <const> = 1
-  local z <const> = 1
-  for k in a() do
-      a = k
-  end    -- ending the loop must close 'x'
-  assert(flag)   -- 'x' must be closed here
-end
-
-
-
-do
-  -- calls cannot be tail in the scope of to-be-closed variables
-  local X, Y
-  local function foo ()
-    local _ <close> = func2close(function () Y = 10 end)
-    assert(X == true and Y == nil)    -- 'X' not closed yet
-    return 1,2,3
-  end
-
-  local function bar ()
-    local _ <close> = func2close(function () X = false end)
-    X = true
-    do
-      return foo()    -- not a tail call!
-    end
-  end
-
-  local a, b, c, d = bar()
-  assert(a == 1 and b == 2 and c == 3 and X == false and Y == 10 and d == nil)
-end
-
-
-do print("testing errors in __close")
-
-  -- original error is in __close
-  local function foo ()
-
-    local x <close> =
-      func2close(function (self, msg)
-        assert(string.find(msg, "@y"))
-        error("@x")
-      end)
-
-    local x1 <close> =
-      func2close(function (self, msg)
-        assert(string.find(msg, "@y"))
-      end)
-
-    local gc <close> = func2close(function () collectgarbage() end)
-
-    local y <close> =
-      func2close(function (self, msg)
-        assert(string.find(msg, "@z"))  -- error in 'z'
-        error("@y")
-      end)
-
-    local z <close> =
-      func2close(function (self, msg)
-        assert(msg == nil)
-        error("@z")
-      end)
-
-    return 200
-  end
-
-  local stat, msg = pcall(foo, false)
-  assert(string.find(msg, "@x"))
-
-
-  -- original error not in __close
-  local function foo ()
-
-    local x <close> =
-      func2close(function (self, msg)
-        -- after error, 'foo' was discarded, so caller now
-        -- must be 'pcall'
-        assert(debug.getinfo(2).name == "pcall")
-        assert(string.find(msg, "@x1"))
-      end)
-
-    local x1 <close> =
-      func2close(function (self, msg)
-        assert(debug.getinfo(2).name == "pcall")
-        assert(string.find(msg, "@y"))
-        error("@x1")
-      end)
-
-    local gc <close> = func2close(function () collectgarbage() end)
-
-    local y <close> =
-      func2close(function (self, msg)
-        assert(debug.getinfo(2).name == "pcall")
-        assert(string.find(msg, "@z"))
-        error("@y")
-      end)
-
-    local first = true
-    local z <close> =
-      func2close(function (self, msg)
-        assert(debug.getinfo(2).name == "pcall")
-        -- 'z' close is called once
-        assert(first and msg == 4)
-        first = false
-        error("@z")
-      end)
-
-    error(4)    -- original error
-  end
-
-  local stat, msg = pcall(foo, true)
-  assert(string.find(msg, "@x1"))
-
-  -- error leaving a block
-  local function foo (...)
-    do
-      local x1 <close> =
-        func2close(function (self, msg)
-          assert(string.find(msg, "@X"))
-          error("@Y")
-        end)
-
-      local x123 <close> =
-        func2close(function (_, msg)
-          assert(msg == nil)
-          error("@X")
-        end)
-    end
-    os.exit(false)    -- should not run
-  end
-
-  local st, msg = xpcall(foo, debug.traceback)
-  assert(string.match(msg, "^[^ ]* @Y"))
-
-  -- error in toclose in vararg function
-  local function foo (...)
-    local x123 <close> = func2close(function () error("@x123") end)
-  end
-
-  local st, msg = xpcall(foo, debug.traceback)
-  assert(string.match(msg, "^[^ ]* @x123"))
-  assert(string.find(msg, "in metamethod 'close'"))
-end
-
-
-do   -- errors due to non-closable values
-  local function foo ()
-    local x <close> = {}
-    os.exit(false)    -- should not run
-  end
-  local stat, msg = pcall(foo)
-  assert(not stat and
-    string.find(msg, "variable 'x' got a non%-closable value"))
-
-  local function foo ()
-    local xyz <close> = setmetatable({}, {__close = print})
-    getmetatable(xyz).__close = nil   -- remove metamethod
-  end
-  local stat, msg = pcall(foo)
-  assert(not stat and string.find(msg, "metamethod 'close'"))
-
-  local function foo ()
-    local a1 <close> = func2close(function (_, msg)
-      assert(string.find(msg, "number value"))
-      error(12)
-    end)
-    local a2 <close> = setmetatable({}, {__close = print})
-    local a3 <close> = func2close(function (_, msg)
-      assert(msg == nil)
-      error(123)
-    end)
-    getmetatable(a2).__close = 4   -- invalidate metamethod
-  end
-  local stat, msg = pcall(foo)
-  assert(not stat and msg == 12)
-end
-
-
-do   -- tbc inside close methods
-  local track = {}
-  local function foo ()
-    local x <close> = func2close(function ()
-      local xx <close> = func2close(function (_, msg)
-        assert(msg == nil)
-        track[#track + 1] = "xx"
-      end)
-      track[#track + 1] = "x"
-    end)
-    track[#track + 1] = "foo"
-    return 20, 30, 40
-  end
-  local a, b, c, d = foo()
-  assert(a == 20 and b == 30 and c == 40 and d == nil)
-  assert(track[1] == "foo" and track[2] == "x" and track[3] == "xx")
-
-  -- again, with errors
-  local track = {}
-  local function foo ()
-    local x0 <close> = func2close(function (_, msg)
-      assert(msg == 202)
-        track[#track + 1] = "x0"
-    end)
-    local x <close> = func2close(function ()
-      local xx <close> = func2close(function (_, msg)
-        assert(msg == 101)
-        track[#track + 1] = "xx"
-        error(202)
-      end)
-      track[#track + 1] = "x"
-      error(101)
-    end)
-    track[#track + 1] = "foo"
-    return 20, 30, 40
-  end
-  local st, msg = pcall(foo)
-  assert(not st and msg == 202)
-  assert(track[1] == "foo" and track[2] == "x" and track[3] == "xx" and
-         track[4] == "x0")
-end
-
-
-local function checktable (t1, t2)
-  assert(#t1 == #t2)
-  for i = 1, #t1 do
-    assert(t1[i] == t2[i])
-  end
-end
-
-
-do    -- test for tbc variable high in the stack
-
-   -- function to force a stack overflow
-  local function overflow (n)
-    overflow(n + 1)
-  end
-
-  -- error handler will create tbc variable handling a stack overflow,
-  -- high in the stack
-  local function errorh (m)
-    assert(string.find(m, "stack overflow"))
-    local x <close> = func2close(function (o) o[1] = 10 end)
-    return x
-  end
-
-  local flag
-  local st, obj
-  -- run test in a coroutine so as not to swell the main stack
-  local co = coroutine.wrap(function ()
-    -- tbc variable down the stack
-    local y <close> = func2close(function (obj, msg)
-      assert(msg == nil)
-      obj[1] = 100
-      flag = obj
-    end)
-    tracegc.stop()
-    st, obj = xpcall(overflow, errorh, 0)
-    tracegc.start()
-  end)
-  co()
-  assert(not st and obj[1] == 10 and flag[1] == 100)
-end
-
-
-if rawget(_G, "T") then
-
-  -- memory error inside closing function
-  local function foo ()
-    local y <close> = func2close(function () T.alloccount() end)
-    local x <close> = setmetatable({}, {__close = function ()
-      T.alloccount(0); local x = {}   -- force a memory error
-    end})
-    error(1000)   -- common error inside the function's body
-  end
-
-  stack(5)    -- ensure a minimal number of CI structures
-
-  -- despite memory error, 'y' will be executed and
-  -- memory limit will be lifted
-  local _, msg = pcall(foo)
-  assert(msg == "not enough memory")
-
-  local closemsg
-  local close = func2close(function (self, msg)
-    T.alloccount()
-    closemsg = msg
-  end)
-
-  -- set a memory limit and return a closing object to remove the limit
-  local function enter (count)
-    stack(10)   -- reserve some stack space
-    T.alloccount(count)
-    closemsg = nil
-    return close
-  end
-
-  local function test ()
-    local x <close> = enter(0)   -- set a memory limit
-    local y = {}    -- raise a memory error
-  end
-
-  local _, msg = pcall(test)
-  assert(msg == "not enough memory" and closemsg == "not enough memory")
-
-
-  -- repeat test with extra closing upvalues
-  local function test ()
-    local xxx <close> = func2close(function (self, msg)
-      assert(msg == "not enough memory");
-      error(1000)   -- raise another error
-    end)
-    local xx <close> = func2close(function (self, msg)
-      assert(msg == "not enough memory");
-    end)
-    local x <close> = enter(0)   -- set a memory limit
-    local y = {}   -- raise a memory error
-  end
-
-  local _, msg = pcall(test)
-  assert(msg == 1000 and closemsg == "not enough memory")
-
-  do    -- testing 'toclose' in C string buffer
-    collectgarbage()
-    local s = string.rep('a', 10000)    -- large string
-    local m = T.totalmem()
-    collectgarbage("stop")
-    s = string.upper(s)    -- allocate buffer + new string (10K each)
-    -- ensure buffer was deallocated
-    assert(T.totalmem() - m <= 11000)
-    collectgarbage("restart")
-  end
-
-  do   -- now some tests for freeing buffer in case of errors
-    local lim = 10000           -- some size larger than the static buffer
-    local extra = 2000          -- some extra memory (for callinfo, etc.)
-
-    local s = string.rep("a", lim)
-
-    -- concat this table needs two buffer resizes (one for each 's')
-    local a = {s, s}
-
-    collectgarbage(); collectgarbage()
-
-    m = T.totalmem()
-    collectgarbage("stop")
-
-    -- error in the first buffer allocation
-    T. totalmem(m + extra)
-    assert(not pcall(table.concat, a))
-    -- first buffer was not even allocated
-    assert(T.totalmem() - m <= extra)
-
-    -- error in the second buffer allocation
-    T. totalmem(m + lim + extra)
-    assert(not pcall(table.concat, a))
-    -- first buffer was released by 'toclose'
-    assert(T.totalmem() - m <= extra)
-
-    -- error in creation of final string
-    T.totalmem(m + 2 * lim + extra)
-    assert(not pcall(table.concat, a))
-    -- second buffer was released by 'toclose'
-    assert(T.totalmem() - m <= extra)
-
-    -- userdata, buffer, buffer, final string
-    T.totalmem(m + 4*lim + extra)
-    assert(#table.concat(a) == 2*lim)
-
-    T.totalmem(0)     -- remove memory limit
-    collectgarbage("restart")
-
-    print'+'
-  end
-
-
-  do
-    -- '__close' vs. return hooks in C functions
-    local trace = {}
-
-    local function hook (event)
-      trace[#trace + 1] = event .. " " .. (debug.getinfo(2).name or "?")
-    end
-
-    -- create tbc variables to be used by C function
-    local x = func2close(function (_,msg)
-      trace[#trace + 1] = "x"
-    end)
-
-    local y = func2close(function (_,msg)
-      trace[#trace + 1] = "y"
-    end)
-
-    debug.sethook(hook, "r")
-    local t = {T.testC([[
-       toclose 2      # x
-       pushnum 10
-       pushint 20
-       toclose 3      # y
-       return 2
-    ]], x, y)}
-    debug.sethook()
-
-    -- hooks ran before return hook from 'testC'
-    checktable(trace,
-       {"return sethook", "y", "return ?", "x", "return ?", "return testC"})
-    -- results are correct
-    checktable(t, {10, 20})
-  end
-end
-
-
-do   -- '__close' vs. return hooks in Lua functions
-  local trace = {}
-
-  local function hook (event)
-    trace[#trace + 1] = event .. " " .. debug.getinfo(2).name
-  end
-
-  local function foo (...)
-    local x <close> = func2close(function (_,msg)
-      trace[#trace + 1] = "x"
-    end)
-
-    local y <close> = func2close(function (_,msg)
-      debug.sethook(hook, "r")
-    end)
-
-    return ...
-  end
-
-  local t = {foo(10,20,30)}
-  debug.sethook()
-  checktable(t, {10, 20, 30})
-  checktable(trace,
-    {"return sethook", "return close", "x", "return close", "return foo"})
-end
-
-
-print "to-be-closed variables in coroutines"
-
-do
-  -- yielding inside closing metamethods
-
-  local trace = {}
-  local co = coroutine.wrap(function ()
-
-    trace[#trace + 1] = "nowX"
-
-    -- will be closed after 'y'
-    local x <close> = func2close(function (_, msg)
-      assert(msg == nil)
-      trace[#trace + 1] = "x1"
-      coroutine.yield("x")
-      trace[#trace + 1] = "x2"
-    end)
-
-    return pcall(function ()
-      do   -- 'z' will be closed first
-        local z <close> = func2close(function (_, msg)
-          assert(msg == nil)
-          trace[#trace + 1] = "z1"
-          coroutine.yield("z")
-          trace[#trace + 1] = "z2"
-        end)
-      end
-
-      trace[#trace + 1] = "nowY"
-
-      -- will be closed after 'z'
-      local y <close> = func2close(function(_, msg)
-        assert(msg == nil)
-        trace[#trace + 1] = "y1"
-        coroutine.yield("y")
-        trace[#trace + 1] = "y2"
-      end)
-
-      return 10, 20, 30
-    end)
-  end)
-
-  assert(co() == "z")
-  assert(co() == "y")
-  assert(co() == "x")
-  checktable({co()}, {true, 10, 20, 30})
-  checktable(trace, {"nowX", "z1", "z2", "nowY", "y1", "y2", "x1", "x2"})
-
-end
-
-
-do
-  -- yielding inside closing metamethods after an error
-
-  local co = coroutine.wrap(function ()
-
-    local function foo (err)
-
-      local z <close> = func2close(function(_, msg)
-        assert(msg == nil or msg == err + 20)
-        coroutine.yield("z")
-        return 100, 200
-      end)
-
-      local y <close> = func2close(function(_, msg)
-        -- still gets the original error (if any)
-        assert(msg == err or (msg == nil and err == 1))
-        coroutine.yield("y")
-        if err then error(err + 20) end   -- creates or changes the error
-      end)
-
-      local x <close> = func2close(function(_, msg)
-        assert(msg == err or (msg == nil and err == 1))
-        coroutine.yield("x")
-        return 100, 200
-      end)
-
-      if err == 10 then error(err) else return 10, 20 end
-    end
-
-    coroutine.yield(pcall(foo, nil))  -- no error
-    coroutine.yield(pcall(foo, 1))    -- error in __close
-    return pcall(foo, 10)     -- 'foo' will raise an error
-  end)
-
-  local a, b = co()   -- first foo: no error
-  assert(a == "x" and b == nil)    -- yields inside 'x'; Ok
-  a, b = co()
-  assert(a == "y" and b == nil)    -- yields inside 'y'; Ok
-  a, b = co()
-  assert(a == "z" and b == nil)    -- yields inside 'z'; Ok
-  local a, b, c = co()
-  assert(a and b == 10 and c == 20)   -- returns from 'pcall(foo, nil)'
-
-  local a, b = co()   -- second foo: error in __close
-  assert(a == "x" and b == nil)    -- yields inside 'x'; Ok
-  a, b = co()
-  assert(a == "y" and b == nil)    -- yields inside 'y'; Ok
-  a, b = co()
-  assert(a == "z" and b == nil)    -- yields inside 'z'; Ok
-  local st, msg = co()             -- reports the error in 'y'
-  assert(not st and msg == 21)
-
-  local a, b = co()    -- third foo: error in function body
-  assert(a == "x" and b == nil)    -- yields inside 'x'; Ok
-  a, b = co()
-  assert(a == "y" and b == nil)    -- yields inside 'y'; Ok
-  a, b = co()
-  assert(a == "z" and b == nil)    -- yields inside 'z'; Ok
-  local st, msg = co()    -- gets final error
-  assert(not st and msg == 10 + 20)
-
-end
-
-
-do
-  -- an error in a wrapped coroutine closes variables
-  local x = false
-  local y = false
-  local co = coroutine.wrap(function ()
-    local xv <close> = func2close(function () x = true end)
-    do
-      local yv <close> = func2close(function () y = true end)
-      coroutine.yield(100)   -- yield doesn't close variable
-    end
-    coroutine.yield(200)   -- yield doesn't close variable
-    error(23)              -- error does
-  end)
-
-  local b = co()
-  assert(b == 100 and not x and not y)
-  b = co()
-  assert(b == 200 and not x and y)
-  local a, b = pcall(co)
-  assert(not a and b == 23 and x and y)
-end
-
-
-do
-
-  -- error in a wrapped coroutine raising errors when closing a variable
-  local x = 0
-  local co = coroutine.wrap(function ()
-    local xx <close> = func2close(function (_, msg)
-      x = x + 1;
-      assert(string.find(msg, "@XXX"))
-      error("@YYY")
-    end)
-    local xv <close> = func2close(function () x = x + 1; error("@XXX") end)
-    coroutine.yield(100)
-    error(200)
-  end)
-  assert(co() == 100); assert(x == 0)
-  local st, msg = pcall(co); assert(x == 2)
-  assert(not st and string.find(msg, "@YYY"))   -- should get error raised
-
-  local x = 0
-  local y = 0
-  co = coroutine.wrap(function ()
-    local xx <close> = func2close(function (_, err)
-      y = y + 1;
-      assert(string.find(err, "XXX"))
-      error("YYY")
-    end)
-    local xv <close> = func2close(function ()
-      x = x + 1; error("XXX")
-    end)
-    coroutine.yield(100)
-    return 200
-  end)
-  assert(co() == 100); assert(x == 0)
-  local st, msg = pcall(co)
-  assert(x == 1 and y == 1)
-  -- should get first error raised
-  assert(not st and string.find(msg, "%w+%.%w+:%d+: YYY"))
-
-end
-
-
--- a suspended coroutine should not close its variables when collected
-local co
-co = coroutine.wrap(function()
-  -- should not run
-  local x <close> = func2close(function () os.exit(false) end)
-  co = nil
-  coroutine.yield()
-end)
-co()                 -- start coroutine
-assert(co == nil)    -- eventually it will be collected
-collectgarbage()
-
-
-if rawget(_G, "T") then
-  print("to-be-closed variables x coroutines in C")
-  do
-    local token = 0
-    local count = 0
-    local f = T.makeCfunc[[
-      toclose 1
-      toclose 2
-      return .
-    ]]
-
-    local obj = func2close(function (_, msg)
-      count = count + 1
-      token = coroutine.yield(count, token)
-    end)
-
-    local co = coroutine.wrap(f)
-    local ct, res = co(obj, obj, 10, 20, 30, 3)   -- will return 10, 20, 30
-    -- initial token value, after closing 2nd obj
-    assert(ct == 1 and res == 0)
-    -- run until yield when closing 1st obj
-    ct, res = co(100)
-    assert(ct == 2 and res == 100)
-    res = {co(200)}      -- run until end
-    assert(res[1] == 10 and res[2] == 20 and res[3] == 30 and res[4] == nil)
-    assert(token == 200)
-  end
-
-  do
-    local f = T.makeCfunc[[
-      toclose 1
-      return .
-    ]]
-
-    local obj = func2close(function ()
-      local temp
-      local x <close> = func2close(function ()
-        coroutine.yield(temp)
-        return 1,2,3    -- to be ignored
-      end)
-      temp = coroutine.yield("closing obj")
-      return 1,2,3    -- to be ignored
-    end)
-
-    local co = coroutine.wrap(f)
-    local res = co(obj, 10, 30, 1)   -- will return only 30
-    assert(res == "closing obj")
-    res = co("closing x")
-    assert(res == "closing x")
-    res = {co()}
-    assert(res[1] == 30 and res[2] == nil)
-  end
-
-  do
-    -- still cannot yield inside 'closeslot'
-    local f = T.makeCfunc[[
-      toclose 1
-      closeslot 1
-    ]]
-    local obj = func2close(coroutine.yield)
-    local co = coroutine.create(f)
-    local st, msg = coroutine.resume(co, obj)
-    assert(not st and string.find(msg, "attempt to yield across"))
-
-    -- nor outside a coroutine
-    local f = T.makeCfunc[[
-      toclose 1
-    ]]
-    local st, msg = pcall(f, obj)
-    assert(not st and string.find(msg, "attempt to yield from outside"))
-  end
-end
-
-
-
--- to-be-closed variables in generic for loops
-do
-  local numopen = 0
-  local function open (x)
-    numopen = numopen + 1
-    return
-      function ()   -- iteraction function
-        x = x - 1
-        if x > 0 then return x end
-      end,
-      nil,   -- state
-      nil,   -- control variable
-      func2close(function () numopen = numopen - 1 end)   -- closing function
-  end
-
-  local s = 0
-  for i in open(10) do
-     s = s + i
-  end
-  assert(s == 45 and numopen == 0)
-
-  local s = 0
-  for i in open(10) do
-     if i < 5 then break end
-     s = s + i
-  end
-  assert(s == 35 and numopen == 0)
-
-  local s = 0
-  for i in open(10) do
-    for j in open(10) do
-       if i + j < 5 then goto endloop end
-       s = s + i
-    end
-  end
-  ::endloop::
-  assert(s == 375 and numopen == 0)
-end
-
 print('OK')
 
 return 5,f

testes/main.lua

@@ -1,5 +1,5 @@
 # testing special comment on first line
--- $Id: testes/main.lua $
+-- $Id: main.lua,v 1.65 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 -- most (all?) tests here assume a reasonable "Unix-like" shell
@@ -13,7 +13,7 @@ print ("testing stand-alone interpreter")
 
 assert(os.execute())   -- machine has a system command
 
-local arg = arg or ARG
+local arg = arg or _ARG
 
 local prog = os.tmpname()
 local otherprog = os.tmpname()
@@ -43,8 +43,6 @@ local function getoutput ()
 end
 
 local function checkprogout (s)
-  -- expected result must end with new line
-  assert(string.sub(s, -1) == "\n")
   local t = getoutput()
   for line in string.gmatch(s, ".-\n") do
     assert(string.find(t, line, 1, true))
@@ -107,7 +105,7 @@ RUN('env LUA_INIT= LUA_PATH=x lua %s > %s', prog, out)
 checkout("x\n")
 
 -- test LUA_PATH_version
-RUN('env LUA_INIT= LUA_PATH_5_4=y LUA_PATH=x lua %s > %s', prog, out)
+RUN('env LUA_INIT= LUA_PATH_5_3=y LUA_PATH=x lua %s > %s', prog, out)
 checkout("y\n")
 
 -- test LUA_CPATH
@@ -116,7 +114,7 @@ RUN('env LUA_INIT= LUA_CPATH=xuxu lua %s > %s', prog, out)
 checkout("xuxu\n")
 
 -- test LUA_CPATH_version
-RUN('env LUA_INIT= LUA_CPATH_5_4=yacc LUA_CPATH=x lua %s > %s', prog, out)
+RUN('env LUA_INIT= LUA_CPATH_5_3=yacc LUA_CPATH=x lua %s > %s', prog, out)
 checkout("yacc\n")
 
 -- test LUA_INIT (and its access to 'arg' table)
@@ -126,7 +124,7 @@ checkout("3.2\n")
 
 -- test LUA_INIT_version
 prepfile("print(X)")
-RUN('env LUA_INIT_5_4="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
+RUN('env LUA_INIT_5_3="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
 checkout("10\n")
 
 -- test LUA_INIT for files
@@ -144,18 +142,12 @@ do
   prepfile("print(package.path, package.cpath)")
   RUN('env LUA_INIT="error(10)" LUA_PATH=xxx LUA_CPATH=xxx lua -E %s > %s',
        prog, out)
-  local output = getoutput()
-  defaultpath = string.match(output, "^(.-)\t")
-  defaultCpath = string.match(output, "\t(.-)$")
-
-  -- running with an empty environment
-  RUN('env -i lua %s > %s', prog, out)
   local out = getoutput()
-  assert(defaultpath == string.match(output, "^(.-)\t"))
-  assert(defaultCpath == string.match(output, "\t(.-)$"))
+  defaultpath = string.match(out, "^(.-)\t")
+  defaultCpath = string.match(out, "\t(.-)$")
 end
 
--- paths did not change
+-- paths did not changed
 assert(not string.find(defaultpath, "xxx") and
        string.find(defaultpath, "lua") and
        not string.find(defaultCpath, "xxx") and
@@ -168,20 +160,15 @@ local function convert (p)
   RUN('env LUA_PATH="%s" lua %s > %s', p, prog, out)
   local expected = getoutput()
   expected = string.sub(expected, 1, -2)   -- cut final end of line
-  if string.find(p, ";;") then
-    p = string.gsub(p, ";;", ";"..defaultpath..";")
-    p = string.gsub(p, "^;", "")   -- remove ';' at the beginning
-    p = string.gsub(p, ";$", "")   -- remove ';' at the end
-  end
-  assert(p == expected)
+  assert(string.gsub(p, ";;", ";"..defaultpath..";") == expected)
 end
 
 convert(";")
 convert(";;")
-convert("a;;b")
-convert(";;b")
-convert("a;;")
-convert("a;b;;c")
+convert(";;;")
+convert(";;;;")
+convert(";;;;;")
+convert(";;a;;;bc")
 
 
 -- test -l over multiple libraries
@@ -195,7 +182,7 @@ local a = [[
   assert(#arg == 3 and arg[1] == 'a' and
          arg[2] == 'b' and arg[3] == 'c')
   assert(arg[-1] == '--' and arg[-2] == "-e " and arg[-3] == '%s')
-  assert(arg[4] == undef and arg[-4] == undef)
+  assert(arg[4] == nil and arg[-4] == nil)
   local a, b, c = ...
   assert(... == 'a' and a == 'a' and b == 'b' and c == 'c')
 ]]
@@ -221,42 +208,6 @@ assert(string.find(getoutput(), "error calling 'print'"))
 RUN('echo "io.stderr:write(1000)\ncont" | lua -e "require\'debug\'.debug()" 2> %s', out)
 checkout("lua_debug> 1000lua_debug> ")
 
-
-print("testing warnings")
-
--- no warnings by default
-RUN('echo "io.stderr:write(1); warn[[XXX]]" | lua 2> %s', out)
-checkout("1")
-
-prepfile[[
-warn("@allow")               -- unknown control, ignored
-warn("@off", "XXX", "@off")  -- these are not control messages
-warn("@off")                 -- this one is
-warn("@on", "YYY", "@on")    -- not control, but warn is off
-warn("@off")                 -- keep it off
-warn("@on")                  -- restart warnings
-warn("", "@on")              -- again, no control, real warning
-warn("@on")                  -- keep it "started"
-warn("Z", "Z", "Z")          -- common warning
-]]
-RUN('lua -W %s 2> %s', prog, out)
-checkout[[
-Lua warning: @offXXX@off
-Lua warning: @on
-Lua warning: ZZZ
-]]
-
-prepfile[[
-warn("@allow")
--- create two objects to be finalized when closing state
--- the errors in the finalizers must generate warnings
-u1 = setmetatable({}, {__gc = function () error("XYZ") end})
-u2 = setmetatable({}, {__gc = function () error("ZYX") end})
-]]
-RUN('lua -W %s 2> %s', prog, out)
-checkprogout("ZYX)\nXYZ)\n")
-
-
 -- test many arguments
 prepfile[[print(({...})[30])]]
 RUN('lua %s %s > %s', prog, string.rep(" a", 30), out)
@@ -287,33 +238,6 @@ RUN([[lua "-e_PROMPT='%s'" -i < %s > %s]], prompt, prog, out)
 local t = getoutput()
 assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
 
--- using the prompt default
-prepfile[[ --
-a = 2
-]]
-RUN([[lua -i < %s > %s]], prog, out)
-local t = getoutput()
-prompt = "> "    -- the default
-assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
-
-
--- non-string prompt
-prompt =
-  "local C = 0;\z
-   _PROMPT=setmetatable({},{__tostring = function () \z
-     C = C + 1; return C end})"
-prepfile[[ --
-a = 2
-]]
-RUN([[lua -e "%s" -i < %s > %s]], prompt, prog, out)
-local t = getoutput()
-assert(string.find(t, [[
-1 --
-2a = 2
-3
-]], 1, true))
-
-
 -- test for error objects
 prepfile[[
 debug = require "debug"
@@ -330,15 +254,15 @@ NoRun("error object is a table value", [[lua %s]], prog)
 
 
 -- chunk broken in many lines
-s = [=[ --
-function f ( x )
+s = [=[ -- 
+function f ( x ) 
   local a = [[
 xuxu
 ]]
   local b = "\
 xuxu\n"
   if x == 11 then return 1 + 12 , 2 + 20 end  --[[ test multiple returns ]]
-  return x + 1
+  return x + 1 
   --\\
 end
 return( f( 100 ) )
@@ -348,16 +272,16 @@ s = string.gsub(s, ' ', '\n\n')   -- change all spaces for newlines
 prepfile(s)
 RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
 checkprogout("101\n13\t22\n\n")
-
+  
 prepfile[[#comment in 1st line without \n at the end]]
 RUN('lua %s', prog)
-
+  
 prepfile[[#test line number when file starts with comment line
 debug = require"debug"
 print(debug.getinfo(1).currentline)
 ]]
 RUN('lua %s > %s', prog, out)
-checkprogout('3\n')
+checkprogout('3')
 
 -- close Lua with an open file
 prepfile(string.format([[io.output(%q); io.write('alo')]], out))
@@ -382,21 +306,6 @@ NoRun("", "lua %s", prog)   -- no message
 prepfile("os.exit(false, true)")
 NoRun("", "lua %s", prog)   -- no message
 
-
--- to-be-closed variables in main chunk
-prepfile[[
-  local x <close> = setmetatable({},
-        {__close = function (self, err)
-                     assert(err == nil)
-                     print("Ok")
-                   end})
-  local e1 <close> = setmetatable({}, {__close = function () print(120) end})
-  os.exit(true, true)
-]]
-RUN('lua %s > %s', prog, out)
-checkprogout("120\nOk\n")
-
-
 -- remove temporary files
 assert(os.remove(prog))
 assert(os.remove(otherprog))
@@ -413,40 +322,17 @@ NoRun("syntax error", "lua -e a")
 NoRun("'-l' needs argument", "lua -l")
 
 
-if T then   -- test library?
+if T then   -- auxiliary library?
   print("testing 'not enough memory' to create a state")
   NoRun("not enough memory", "env MEMLIMIT=100 lua")
-
-  -- testing 'warn'
-  warn("@store")
-  warn("@123", "456", "789")
-  assert(_WARN == "@123456789"); _WARN = false
-
-  warn("zip", "", " ", "zap")
-  assert(_WARN == "zip zap"); _WARN = false
-  warn("ZIP", "", " ", "ZAP")
-  assert(_WARN == "ZIP ZAP"); _WARN = false
-  warn("@normal")
 end
-
-do
-  -- 'warn' must get at least one argument
-  local st, msg = pcall(warn)
-  assert(string.find(msg, "string expected"))
-
-  -- 'warn' does not leave unfinished warning in case of errors
-  -- (message would appear in next warning)
-  st, msg = pcall(warn, "SHOULD NOT APPEAR", {})
-  assert(string.find(msg, "string expected"))
-end
-
 print('+')
 
 print('testing Ctrl C')
 do
   -- interrupt a script
   local function kill (pid)
-    return os.execute(string.format('kill -INT %s 2> /dev/null', pid))
+    return os.execute(string.format('kill -INT %d 2> /dev/null', pid))
   end
 
   -- function to run a script in background, returning its output file

testes/math.lua

@@ -1,12 +1,12 @@
--- $Id: testes/math.lua $
+-- $Id: math.lua,v 1.78 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print("testing numbers and math lib")
 
-local minint <const> = math.mininteger
-local maxint <const> = math.maxinteger
+local minint = math.mininteger
+local maxint = math.maxinteger
 
-local intbits <const> = math.floor(math.log(maxint, 2) + 0.5) + 1
+local intbits = math.floor(math.log(maxint, 2) + 0.5) + 1
 assert((1 << intbits) == 0)
 
 assert(minint == 1 << (intbits - 1))
@@ -39,7 +39,7 @@ do
 end
 
 assert(math.type(0) == "integer" and math.type(0.0) == "float"
-       and not math.type("10"))
+       and math.type("10") == nil)
 
 
 local function checkerror (msg, f, ...)
@@ -139,17 +139,6 @@ assert(-1 // 0.0 == -1/0)
 assert(eqT(3.5 // 1.5, 2.0))
 assert(eqT(3.5 // -1.5, -3.0))
 
-do   -- tests for different kinds of opcodes
-  local x, y 
-  x = 1; assert(x // 0.0 == 1/0)
-  x = 1.0; assert(x // 0 == 1/0)
-  x = 3.5; assert(eqT(x // 1, 3.0))
-  assert(eqT(x // -1, -4.0))
-
-  x = 3.5; y = 1.5; assert(eqT(x // y, 2.0))
-  x = 3.5; y = -1.5; assert(eqT(x // y, -3.0))
-end
-
 assert(maxint // maxint == 1)
 assert(maxint // 1 == maxint)
 assert((maxint - 1) // maxint == 0)
@@ -270,7 +259,7 @@ else
 end
 
 do
-  local NaN <const> = 0/0
+  local NaN = 0/0
   assert(not (NaN < 0))
   assert(not (NaN > minint))
   assert(not (NaN <= -9))
@@ -278,8 +267,6 @@ do
   assert(not (NaN < maxint))
   assert(not (minint <= NaN))
   assert(not (minint < NaN))
-  assert(not (4 <= NaN))
-  assert(not (4 < NaN))
 end
 
 
@@ -292,7 +279,7 @@ checkcompt(msgf2i, "return 2.3 >> 0")
 checkcompt(msgf2i, ("return 2.0^%d & 1"):format(intbits - 1))
 checkcompt("field 'huge'", "return math.huge << 1")
 checkcompt(msgf2i, ("return 1 | 2.0^%d"):format(intbits - 1))
-checkcompt(msgf2i, "return 2.3 ~ 0.0")
+checkcompt(msgf2i, "return 2.3 ~ '0.0'")
 
 
 -- testing overflow errors when converting from float to integer (runtime)
@@ -381,17 +368,17 @@ assert(tonumber(1/0) == 1/0)
 
 -- 'tonumber' with strings
 assert(tonumber("0") == 0)
-assert(not tonumber(""))
-assert(not tonumber("  "))
-assert(not tonumber("-"))
-assert(not tonumber("  -0x "))
-assert(not tonumber{})
+assert(tonumber("") == nil)
+assert(tonumber("  ") == nil)
+assert(tonumber("-") == nil)
+assert(tonumber("  -0x ") == nil)
+assert(tonumber{} == nil)
 assert(tonumber'+0.01' == 1/100 and tonumber'+.01' == 0.01 and
        tonumber'.01' == 0.01    and tonumber'-1.' == -1 and
        tonumber'+1.' == 1)
-assert(not tonumber'+ 0.01' and not tonumber'+.e1' and
-       not tonumber'1e'     and not tonumber'1.0e+' and
-       not tonumber'.')
+assert(tonumber'+ 0.01' == nil and tonumber'+.e1' == nil and
+       tonumber'1e' == nil     and tonumber'1.0e+' == nil and
+       tonumber'.' == nil)
 assert(tonumber('-012') == -010-2)
 assert(tonumber('-1.2e2') == - - -120)
 
@@ -445,45 +432,45 @@ local function f (...)
   end
 end
 
-assert(not f(tonumber('fFfa', 15)))
-assert(not f(tonumber('099', 8)))
-assert(not f(tonumber('1\0', 2)))
-assert(not f(tonumber('', 8)))
-assert(not f(tonumber('  ', 9)))
-assert(not f(tonumber('  ', 9)))
-assert(not f(tonumber('0xf', 10)))
+assert(f(tonumber('fFfa', 15)) == nil)
+assert(f(tonumber('099', 8)) == nil)
+assert(f(tonumber('1\0', 2)) == nil)
+assert(f(tonumber('', 8)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('  ', 9)) == nil)
+assert(f(tonumber('0xf', 10)) == nil)
 
-assert(not f(tonumber('inf')))
-assert(not f(tonumber(' INF ')))
-assert(not f(tonumber('Nan')))
-assert(not f(tonumber('nan')))
+assert(f(tonumber('inf')) == nil)
+assert(f(tonumber(' INF ')) == nil)
+assert(f(tonumber('Nan')) == nil)
+assert(f(tonumber('nan')) == nil)
 
-assert(not f(tonumber('  ')))
-assert(not f(tonumber('')))
-assert(not f(tonumber('1  a')))
-assert(not f(tonumber('1  a', 2)))
-assert(not f(tonumber('1\0')))
-assert(not f(tonumber('1 \0')))
-assert(not f(tonumber('1\0 ')))
-assert(not f(tonumber('e1')))
-assert(not f(tonumber('e  1')))
-assert(not f(tonumber(' 3.4.5 ')))
+assert(f(tonumber('  ')) == nil)
+assert(f(tonumber('')) == nil)
+assert(f(tonumber('1  a')) == nil)
+assert(f(tonumber('1  a', 2)) == nil)
+assert(f(tonumber('1\0')) == nil)
+assert(f(tonumber('1 \0')) == nil)
+assert(f(tonumber('1\0 ')) == nil)
+assert(f(tonumber('e1')) == nil)
+assert(f(tonumber('e  1')) == nil)
+assert(f(tonumber(' 3.4.5 ')) == nil)
 
 
 -- testing 'tonumber' for invalid hexadecimal formats
 
-assert(not tonumber('0x'))
-assert(not tonumber('x'))
-assert(not tonumber('x3'))
-assert(not tonumber('0x3.3.3'))   -- two decimal points
-assert(not tonumber('00x2'))
-assert(not tonumber('0x 2'))
-assert(not tonumber('0 x2'))
-assert(not tonumber('23x'))
-assert(not tonumber('- 0xaa'))
-assert(not tonumber('-0xaaP '))   -- no exponent
-assert(not tonumber('0x0.51p'))
-assert(not tonumber('0x5p+-2'))
+assert(tonumber('0x') == nil)
+assert(tonumber('x') == nil)
+assert(tonumber('x3') == nil)
+assert(tonumber('0x3.3.3') == nil)   -- two decimal points
+assert(tonumber('00x2') == nil)
+assert(tonumber('0x 2') == nil)
+assert(tonumber('0 x2') == nil)
+assert(tonumber('23x') == nil)
+assert(tonumber('- 0xaa') == nil)
+assert(tonumber('-0xaaP ') == nil)   -- no exponent
+assert(tonumber('0x0.51p') == nil)
+assert(tonumber('0x5p+-2') == nil)
 
 
 -- testing hexadecimal numerals
@@ -541,73 +528,9 @@ assert(eqT(-4 % 3, 2))
 assert(eqT(4 % -3, -2))
 assert(eqT(-4.0 % 3, 2.0))
 assert(eqT(4 % -3.0, -2.0))
-assert(eqT(4 % -5, -1))
-assert(eqT(4 % -5.0, -1.0))
-assert(eqT(4 % 5, 4))
-assert(eqT(4 % 5.0, 4.0))
-assert(eqT(-4 % -5, -4))
-assert(eqT(-4 % -5.0, -4.0))
-assert(eqT(-4 % 5, 1))
-assert(eqT(-4 % 5.0, 1.0))
-assert(eqT(4.25 % 4, 0.25))
-assert(eqT(10.0 % 2, 0.0))
-assert(eqT(-10.0 % 2, 0.0))
-assert(eqT(-10.0 % -2, 0.0))
 assert(math.pi - math.pi % 1 == 3)
 assert(math.pi - math.pi % 0.001 == 3.141)
 
-do   -- very small numbers
-  local i, j = 0, 20000
-  while i < j do
-    local m = (i + j) // 2
-    if 10^-m > 0 then
-      i = m + 1
-    else
-      j = m
-    end
-  end
-  -- 'i' is the smallest possible ten-exponent
-  local b = 10^-(i - (i // 10))   -- a very small number
-  assert(b > 0 and b * b == 0)
-  local delta = b / 1000
-  assert(eq((2.1 * b) % (2 * b), (0.1 * b), delta))
-  assert(eq((-2.1 * b) % (2 * b), (2 * b) - (0.1 * b), delta))
-  assert(eq((2.1 * b) % (-2 * b), (0.1 * b) - (2 * b), delta))
-  assert(eq((-2.1 * b) % (-2 * b), (-0.1 * b), delta))
-end
-
-
--- basic consistency between integer modulo and float modulo
-for i = -10, 10 do
-  for j = -10, 10 do
-    if j ~= 0 then
-      assert((i + 0.0) % j == i % j)
-    end
-  end
-end
-
-for i = 0, 10 do
-  for j = -10, 10 do
-    if j ~= 0 then
-      assert((2^i) % j == (1 << i) % j)
-    end
-  end
-end
-
-do    -- precision of module for large numbers
-  local i = 10
-  while (1 << i) > 0 do
-    assert((1 << i) % 3 == i % 2 + 1)
-    i = i + 1
-  end
-
-  i = 10
-  while 2^i < math.huge do
-    assert(2^i % 3 == i % 2 + 1)
-    i = i + 1
-  end
-end
-
 assert(eqT(minint % minint, 0))
 assert(eqT(maxint % maxint, 0))
 assert((minint + 1) % minint == minint + 1)
@@ -705,19 +628,19 @@ do   -- testing floor & ceil
   assert(eqT(math.tointeger(maxint), maxint))
   assert(eqT(math.tointeger(maxint .. ""), maxint))
   assert(eqT(math.tointeger(minint + 0.0), minint))
-  assert(not math.tointeger(0.0 - minint))
-  assert(not math.tointeger(math.pi))
-  assert(not math.tointeger(-math.pi))
+  assert(math.tointeger(0.0 - minint) == nil)
+  assert(math.tointeger(math.pi) == nil)
+  assert(math.tointeger(-math.pi) == nil)
   assert(math.floor(math.huge) == math.huge)
   assert(math.ceil(math.huge) == math.huge)
-  assert(not math.tointeger(math.huge))
+  assert(math.tointeger(math.huge) == nil)
   assert(math.floor(-math.huge) == -math.huge)
   assert(math.ceil(-math.huge) == -math.huge)
-  assert(not math.tointeger(-math.huge))
+  assert(math.tointeger(-math.huge) == nil)
   assert(math.tointeger("34.0") == 34)
-  assert(not math.tointeger("34.3"))
-  assert(not math.tointeger({}))
-  assert(not math.tointeger(0/0))    -- NaN
+  assert(math.tointeger("34.3") == nil)
+  assert(math.tointeger({}) == nil)
+  assert(math.tointeger(0/0) == nil)    -- NaN
 end
 
 
@@ -758,7 +681,7 @@ do    -- testing max/min
   assert(eqT(math.min(maxint, maxint - 1), maxint - 1))
   assert(eqT(math.min(maxint - 2, maxint, maxint - 1), maxint - 2))
 end
--- testing implicit conversions
+-- testing implicit convertions
 
 local a,b = '10', '20'
 assert(a*b == 200 and a+b == 30 and a-b == -10 and a/b == 0.5 and -b == -20)
@@ -767,8 +690,7 @@ assert(a == '10' and b == '20')
 
 do
   print("testing -0 and NaN")
-  local mz <const> = -0.0
-  local z <const> = 0.0
+  local mz, z = -0.0, 0.0
   assert(mz == z)
   assert(1/mz < 0 and 0 < 1/z)
   local a = {[mz] = 1}
@@ -776,25 +698,24 @@ do
   a[z] = 2
   assert(a[z] == 2 and a[mz] == 2)
   local inf = math.huge * 2 + 1
-  local mz <const> = -1/inf
-  local z <const> = 1/inf
+  mz, z = -1/inf, 1/inf
   assert(mz == z)
   assert(1/mz < 0 and 0 < 1/z)
-  local NaN <const> = inf - inf
+  local NaN = inf - inf
   assert(NaN ~= NaN)
   assert(not (NaN < NaN))
   assert(not (NaN <= NaN))
   assert(not (NaN > NaN))
   assert(not (NaN >= NaN))
   assert(not (0 < NaN) and not (NaN < 0))
-  local NaN1 <const> = 0/0
+  local NaN1 = 0/0
   assert(NaN ~= NaN1 and not (NaN <= NaN1) and not (NaN1 <= NaN))
   local a = {}
   assert(not pcall(rawset, a, NaN, 1))
-  assert(a[NaN] == undef)
+  assert(a[NaN] == nil)
   a[1] = 1
   assert(not pcall(rawset, a, NaN, 1))
-  assert(a[NaN] == undef)
+  assert(a[NaN] == nil)
   -- strings with same binary representation as 0.0 (might create problems
   -- for constant manipulation in the pre-compiler)
   local a1, a2, a3, a4, a5 = 0, 0, "\0\0\0\0\0\0\0\0", 0, "\0\0\0\0\0\0\0\0"
@@ -804,220 +725,100 @@ end
 
 
 print("testing 'math.random'")
-
-local random, max, min = math.random, math.max, math.min
-
-local function testnear (val, ref, tol)
-  return (math.abs(val - ref) < ref * tol)
-end
-
-
--- low-level!! For the current implementation of random in Lua,
--- the first call after seed 1007 should return 0x7a7040a5a323c9d6
-do
-  -- all computations should work with 32-bit integers
-  local h <const> = 0x7a7040a5   -- higher half
-  local l <const> = 0xa323c9d6   -- lower half
-
-  math.randomseed(1007)
-  -- get the low 'intbits' of the 64-bit expected result
-  local res = (h << 32 | l) & ~(~0 << intbits)
-  assert(random(0) == res)
-
-  math.randomseed(1007, 0)
-  -- using higher bits to generate random floats; (the '% 2^32' converts
-  -- 32-bit integers to floats as unsigned)
-  local res
-  if floatbits <= 32 then
-    -- get all bits from the higher half
-    res = (h >> (32 - floatbits)) % 2^32
-  else
-    -- get 32 bits from the higher half and the rest from the lower half
-    res = (h % 2^32) * 2^(floatbits - 32) + ((l >> (64 - floatbits)) % 2^32)
-  end
-  local rand = random()
-  assert(eq(rand, 0x0.7a7040a5a323c9d6, 2^-floatbits))
-  assert(rand * 2^floatbits == res)
-end
-
-do
-  -- testing return of 'randomseed'
-  local x, y = math.randomseed()
-  local res = math.random(0)
-  x, y = math.randomseed(x, y)    -- should repeat the state
-  assert(math.random(0) == res)
-  math.randomseed(x, y)    -- again should repeat the state
-  assert(math.random(0) == res)
-  -- keep the random seed for following tests
-end
+math.randomseed(0)
 
 do   -- test random for floats
-  local randbits = math.min(floatbits, 64)   -- at most 64 random bits
-  local mult = 2^randbits      -- to make random float into an integral
-  local counts = {}    -- counts for bits
-  for i = 1, randbits do counts[i] = 0 end
-  local up = -math.huge
-  local low = math.huge
-  local rounds = 100 * randbits   -- 100 times for each bit
-  local totalrounds = 0
-  ::doagain::   -- will repeat test until we get good statistics
-  for i = 0, rounds do
-    local t = random()
+  local max = -math.huge
+  local min = math.huge
+  for i = 0, 20000 do
+    local t = math.random()
     assert(0 <= t and t < 1)
-    up = max(up, t)
-    low = min(low, t)
-    assert(t * mult % 1 == 0)    -- no extra bits
-    local bit = i % randbits     -- bit to be tested
-    if (t * 2^bit) % 1 >= 0.5 then    -- is bit set?
-      counts[bit + 1] = counts[bit + 1] + 1   -- increment its count
+    max = math.max(max, t)
+    min = math.min(min, t)
+    if eq(max, 1, 0.001) and eq(min, 0, 0.001) then
+      goto ok
     end
   end
-  totalrounds = totalrounds + rounds
-  if not (eq(up, 1, 0.001) and eq(low, 0, 0.001)) then
-    goto doagain
-  end
-  -- all bit counts should be near 50%
-  local expected = (totalrounds / randbits / 2)
-  for i = 1, randbits do
-    if not testnear(counts[i], expected, 0.10) then
-      goto doagain
-    end
-  end
-  print(string.format("float random range in %d calls: [%f, %f]",
-                      totalrounds, low, up))
-end
-
-
-do   -- test random for full integers
-  local up = 0
-  local low = 0
-  local counts = {}    -- counts for bits
-  for i = 1, intbits do counts[i] = 0 end
-  local rounds = 100 * intbits   -- 100 times for each bit
-  local totalrounds = 0
-  ::doagain::   -- will repeat test until we get good statistics
-  for i = 0, rounds do
-    local t = random(0)
-    up = max(up, t)
-    low = min(low, t)
-    local bit = i % intbits     -- bit to be tested
-    -- increment its count if it is set
-    counts[bit + 1] = counts[bit + 1] + ((t >> bit) & 1)
-  end
-  totalrounds = totalrounds + rounds
-  local lim = maxint >> 10
-  if not (maxint - up < lim and low - minint < lim) then
-    goto doagain
-  end
-  -- all bit counts should be near 50%
-  local expected = (totalrounds / intbits / 2)
-  for i = 1, intbits do
-    if not testnear(counts[i], expected, 0.10) then
-      goto doagain
-    end
-  end
-  print(string.format(
-     "integer random range in %d calls: [minint + %.0fppm, maxint - %.0fppm]",
-      totalrounds, (minint - low) / minint * 1e6,
-                   (maxint - up) / maxint * 1e6))
+  -- loop ended without satisfing condition
+  assert(false)
+ ::ok::
 end
 
 do
-  -- test distribution for a dice
-  local count = {0, 0, 0, 0, 0, 0}
-  local rep = 200
-  local totalrep = 0
-  ::doagain::
-  for i = 1, rep * 6 do
-    local r = random(6)
-    count[r] = count[r] + 1
-  end
-  totalrep = totalrep + rep
-  for i = 1, 6 do
-    if not testnear(count[i], totalrep, 0.05) then
-      goto doagain
+  local function aux (p, lim)   -- test random for small intervals
+    local x1, x2
+    if #p == 1 then x1 = 1; x2 = p[1]
+    else x1 = p[1]; x2 = p[2]
     end
-  end
-end
-
-do
-  local function aux (x1, x2)     -- test random for small intervals
     local mark = {}; local count = 0   -- to check that all values appeared
-    while true do
-      local t = random(x1, x2)
+    for i = 0, lim or 2000 do
+      local t = math.random(table.unpack(p))
       assert(x1 <= t and t <= x2)
       if not mark[t] then  -- new value
         mark[t] = true
         count = count + 1
-        if count == x2 - x1 + 1 then   -- all values appeared; OK
-          goto ok
-        end
+      end
+      if count == x2 - x1 + 1 then   -- all values appeared; OK
+        goto ok
       end
     end
+    -- loop ended without satisfing condition
+    assert(false)
    ::ok::
   end
 
-  aux(-10,0)
-  aux(1, 6)
-  aux(1, 2)
-  aux(1, 13)
-  aux(1, 31)
-  aux(1, 32)
-  aux(1, 33)
-  aux(-10, 10)
-  aux(-10,-10)   -- unit set
-  aux(minint, minint)   -- unit set
-  aux(maxint, maxint)   -- unit set
-  aux(minint, minint + 9)
-  aux(maxint - 3, maxint)
+  aux({-10,0})
+  aux({6})
+  aux({-10, 10})
+  aux({minint, minint})
+  aux({maxint, maxint})
+  aux({minint, minint + 9})
+  aux({maxint - 3, maxint})
 end
 
 do
   local function aux(p1, p2)       -- test random for large intervals
     local max = minint
     local min = maxint
-    local n = 100
+    local n = 200
     local mark = {}; local count = 0   -- to count how many different values
-    ::doagain::
     for _ = 1, n do
-      local t = random(p1, p2)
+      local t = math.random(p1, p2)
+      max = math.max(max, t)
+      min = math.min(min, t)
       if not mark[t] then  -- new value
-        assert(p1 <= t and t <= p2)
-        max = math.max(max, t)
-        min = math.min(min, t)
         mark[t] = true
         count = count + 1
       end
     end
     -- at least 80% of values are different
-    if not (count >= n * 0.8) then
-      goto doagain
-    end
+    assert(count >= n * 0.8)
     -- min and max not too far from formal min and max
-    local diff = (p2 - p1) >> 4
-    if not (min < p1 + diff and max > p2 - diff) then
-      goto doagain
-    end
+    local diff = (p2 - p1) // 8
+    assert(min < p1 + diff and max > p2 - diff)
   end
   aux(0, maxint)
   aux(1, maxint)
-  aux(3, maxint // 3)
   aux(minint, -1)
   aux(minint // 2, maxint // 2)
-  aux(minint, maxint)
-  aux(minint + 1, maxint)
-  aux(minint, maxint - 1)
-  aux(0, 1 << (intbits - 5))
 end
 
+for i=1,100 do
+  assert(math.random(maxint) > 0)
+  assert(math.random(minint, -1) < 0)
+end
 
-assert(not pcall(random, 1, 2, 3))    -- too many arguments
+assert(not pcall(math.random, 1, 2, 3))    -- too many arguments
 
 -- empty interval
-assert(not pcall(random, minint + 1, minint))
-assert(not pcall(random, maxint, maxint - 1))
-assert(not pcall(random, maxint, minint))
+assert(not pcall(math.random, minint + 1, minint))
+assert(not pcall(math.random, maxint, maxint - 1))
+assert(not pcall(math.random, maxint, minint))
 
+-- interval too large
+assert(not pcall(math.random, minint, 0))
+assert(not pcall(math.random, -1, maxint))
+assert(not pcall(math.random, minint // 2, maxint // 2 + 1))
 
 
 print('OK')

testes/nextvar.lua

@@ -1,4 +1,4 @@
--- $Id: testes/nextvar.lua $
+-- $Id: nextvar.lua,v 1.79 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing tables, next, and for')
@@ -13,7 +13,7 @@ local a = {}
 
 -- make sure table has lots of space in hash part
 for i=1,100 do a[i.."+"] = true end
-for i=1,100 do a[i.."+"] = undef end
+for i=1,100 do a[i.."+"] = nil end
 -- fill hash part with numeric indices testing size operator
 for i=1,100 do
   a[i] = true
@@ -49,14 +49,34 @@ if not T then
 else --[
 -- testing table sizes
 
+local function log2 (x) return math.log(x, 2) end
 
 local function mp2 (n)   -- minimum power of 2 >= n
-  local mp = 2^math.ceil(math.log(n, 2))
+  local mp = 2^math.ceil(log2(n))
   assert(n == 0 or (mp/2 < n and n <= mp))
   return mp
 end
 
+local function fb (n)
+  local r, nn = T.int2fb(n)
+  assert(r < 256)
+  return nn
+end
 
+-- test fb function
+for a = 1, 10000 do   -- all numbers up to 10^4
+  local n = fb(a)
+  assert(a <= n and n <= a*1.125)
+end
+local a = 1024   -- plus a few up to 2 ^30
+local lim = 2^30
+while a < lim do
+  local n = fb(a)
+  assert(a <= n and n <= a*1.125)
+  a = math.ceil(a*1.3)
+end
+
+ 
 local function check (t, na, nh)
   local a, h = T.querytab(t)
   if a ~= na or h ~= nh then
@@ -75,46 +95,30 @@ end
 
 
 -- testing constructor sizes
-local sizes = {0, 1, 2, 3, 4, 5, 7, 8, 9, 15, 16, 17,
-  30, 31, 32, 33, 34, 254, 255, 256, 500, 1000}
-
-for _, sa in ipairs(sizes) do    -- 'sa' is size of the array part
-  local arr = {"return {"}
-  for i = 1, sa do arr[1 + i] = "1," end    -- build array part
-  for _, sh in ipairs(sizes) do    -- 'sh' is size of the hash part
-    for j = 1, sh do   -- build hash part
-      arr[1 + sa + j] = string.format('k%x=%d,', j, j)
-    end
-    arr[1 + sa + sh + 1] = "}"
-    local prog = table.concat(arr)
-    local f = assert(load(prog))
-    collectgarbage("stop")
-    f()    -- call once to ensure stack space
-    -- make sure table is not resized after being created
-    if sa == 0 or sh == 0 then
-      T.alloccount(2);  -- header + array or hash part
-    else
-      T.alloccount(3);  -- header + array part + hash part
-    end
-    local t = f()
-    T.alloccount();
-    collectgarbage("restart")
-    assert(#t == sa)
-    check(t, sa, mp2(sh))
+local lim = 40
+local s = 'return {'
+for i=1,lim do
+  s = s..i..','
+  local s = s
+  for k=0,lim do 
+    local t = load(s..'}', '')()
+    assert(#t == i)
+    check(t, fb(i), mp2(k))
+    s = string.format('%sa%d=%d,', s, k, k)
   end
 end
 
 
 -- tests with unknown number of elements
 local a = {}
-for i=1,sizes[#sizes] do a[i] = i end   -- build auxiliary table
-for k in ipairs(sizes) do
-  local t = {table.unpack(a,1,k)}
-  assert(#t == k)
-  check(t, k, 0)
-  t = {1,2,3,table.unpack(a,1,k)}
-  check(t, k+3, 0)
-  assert(#t == k + 3)
+for i=1,lim do a[i] = i end   -- build auxiliary table
+for k=0,lim do
+  local a = {table.unpack(a,1,k)}
+  assert(#a == k)
+  check(a, k, 0)
+  a = {1,2,3,table.unpack(a,1,k)}
+  check(a, k+3, 0)
+  assert(#a == k + 3)
 end
 
 
@@ -141,14 +145,14 @@ a = {}
 for i=1,16 do a[i] = i end
 check(a, 16, 0)
 do
-  for i=1,11 do a[i] = undef end
-  for i=30,50 do a[i] = true; a[i] = undef end   -- force a rehash (?)
-  check(a, 0, 8)   -- 5 elements in the table
+  for i=1,11 do a[i] = nil end
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
+  check(a, 0, 8)   -- only 5 elements in the table
   a[10] = 1
-  for i=30,50 do a[i] = true; a[i] = undef end   -- force a rehash (?)
+  for i=30,50 do a[i] = nil end   -- force a rehash (?)
   check(a, 0, 8)   -- only 6 elements in the table
-  for i=1,14 do a[i] = true; a[i] = undef end
-  for i=18,50 do a[i] = true; a[i] = undef end   -- force a rehash (?)
+  for i=1,14 do a[i] = nil end
+  for i=18,50 do a[i] = nil end   -- force a rehash (?)
   check(a, 0, 4)   -- only 2 elements ([15] and [16])
 end
 
@@ -173,31 +177,15 @@ end
 local a = {}
 for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
 
-
--- Table length with limit smaller than maximum value at array
-local a = {}
-for i = 1,64 do a[i] = true end    -- make its array size 64
-for i = 1,64 do a[i] = nil end     -- erase all elements
-assert(T.querytab(a) == 64)    -- array part has 64 elements
-a[32] = true; a[48] = true;    -- binary search will find these ones
-a[51] = true                   -- binary search will miss this one
-assert(#a == 48)               -- this will set the limit
-assert(select(4, T.querytab(a)) == 48)  -- this is the limit now
-a[50] = true                   -- this will set a new limit
-assert(select(4, T.querytab(a)) == 50)  -- this is the limit now
--- but the size is larger (and still inside the array part)
-assert(#a == 51)
-
 end  --]
 
 
--- test size operation on tables with nils
+-- test size operation on empty tables
 assert(#{} == 0)
 assert(#{nil} == 0)
 assert(#{nil, nil} == 0)
 assert(#{nil, nil, nil} == 0)
 assert(#{nil, nil, nil, nil} == 0)
-assert(#{1, 2, 3, nil, nil} == 3)
 print'+'
 
 
@@ -215,7 +203,7 @@ local function find (name)
   while 1 do
     n,v = next(_G, n)
     if not n then return nofind end
-    assert(_G[n] ~= undef)
+    assert(v ~= nil)
     if n == name then return v end
   end
 end
@@ -233,7 +221,7 @@ assert(_G["print"]==find("print"))
 assert(assert==find1("assert"))
 assert(nofind==find("return"))
 assert(not find1("return"))
-_G["ret" .. "urn"] = undef
+_G["ret" .. "urn"] = nil
 assert(nofind==find("return"))
 _G["xxx"] = 1
 assert(xxx==find("xxx"))
@@ -268,14 +256,14 @@ do   -- clear global table
   for n,v in pairs(a) do
     if not package.loaded[n] and type(v) ~= "function" and
        not string.find(n, "^[%u_]") then
-      _G[n] = undef
+     _G[n] = nil
     end
     collectgarbage()
   end
 end
 
 
---
+-- 
 
 local function checknext (a)
   local b = {}
@@ -292,6 +280,7 @@ checknext{1,2,3,4,5,x=1,y=2,z=3}
 
 assert(#{} == 0)
 assert(#{[-1] = 2} == 0)
+assert(#{1,2,3,nil,nil} == 3)
 for i=0,40 do
   local a = {}
   for j=1,i do a[j]=j end
@@ -323,27 +312,6 @@ assert(a[#a])
 print('+')
 
 
-do    -- testing 'next' with all kinds of keys
-  local a = {
-    [1] = 1,                        -- integer
-    [1.1] = 2,                      -- float
-    ['x'] = 3,                      -- short string
-    [string.rep('x', 1000)] = 4,    -- long string
-    [print] = 5,                    -- C function
-    [checkerror] = 6,               -- Lua function
-    [coroutine.running()] = 7,      -- thread
-    [true] = 8,                     -- boolean
-    [io.stdin] = 9,                 -- userdata
-    [{}] = 10,                      -- table
-  }
-  local b = {}; for i = 1, 10 do b[i] = true end
-  for k, v in pairs(a) do
-    assert(b[v]); b[v] = undef
-  end
-  assert(next(b) == nil)        -- 'b' now is empty
-end
-
-
 -- erasing values
 local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
            [100.3] = 4, [4] = 5}
@@ -352,53 +320,19 @@ local n = 0
 for k, v in pairs( t ) do
   n = n+1
   assert(t[k] == v)
-  t[k] = undef
+  t[k] = nil
   collectgarbage()
-  assert(t[k] == undef)
+  assert(t[k] == nil)
 end
 assert(n == 5)
 
 
-do
-  print("testing next x GC of deleted keys")
-  -- bug in 5.4.1
-  local co = coroutine.wrap(function (t)
-    for k, v in pairs(t) do
-        local k1 = next(t)    -- all previous keys were deleted
-        assert(k == k1)       -- current key is the first in the table
-        t[k] = nil
-        local expected = (type(k) == "table" and k[1] or
-                          type(k) == "function" and k() or
-                          string.sub(k, 1, 1))
-        assert(expected == v)
-        coroutine.yield(v)
-    end
-  end)
-  local t = {}
-  t[{1}] = 1    -- add several unanchored, collectable keys
-  t[{2}] = 2
-  t[string.rep("a", 50)] = "a"    -- long string
-  t[string.rep("b", 50)] = "b"
-  t[{3}] = 3
-  t[string.rep("c", 10)] = "c"    -- short string
-  t[function () return 10 end] = 10
-  local count = 7
-  while co(t) do
-    collectgarbage("collect")   -- collect dead keys
-    count = count - 1
-  end
-  assert(count == 0 and next(t) == nil)    -- traversed the whole table
-end
-
-
 local function test (a)
   assert(not pcall(table.insert, a, 2, 20));
   table.insert(a, 10); table.insert(a, 2, 20);
   table.insert(a, 1, -1); table.insert(a, 40);
   table.insert(a, #a+1, 50)
   table.insert(a, 2, -2)
-  assert(a[2] ~= undef)
-  assert(a["2"] == undef)
   assert(not pcall(table.insert, a, 0, 20));
   assert(not pcall(table.insert, a, #a + 2, 20));
   assert(table.remove(a,1) == -1)
@@ -425,7 +359,7 @@ test(a)
 assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
 
 a = {[0] = "ban"}
-assert(#a == 0 and table.remove(a) == "ban" and a[0] == undef)
+assert(#a == 0 and table.remove(a) == "ban" and a[0] == nil)
 
 table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
 assert(table.remove(a) == 10)
@@ -457,7 +391,7 @@ do   -- testing table library with metamethods
     for i = 1, 10 do
       table.insert(proxy, 1, i)
     end
-    assert(#proxy == 10 and #t == 10 and proxy[1] ~= undef)
+    assert(#proxy == 10 and #t == 10)
     for i = 1, 10 do
       assert(t[i] == 11 - i)
     end
@@ -528,7 +462,7 @@ else --[
   mt.__newindex = nil
   mt.__len = nil
   local tab2 = {}
-  local u2 = T.newuserdata(0)
+  local u2 = T.newuserdata(0) 
   debug.setmetatable(u2, {__newindex = function (_, k, v) tab2[k] = v end})
   table.move(u, 1, 4, 1, u2)
   assert(#tab2 == 4 and tab2[1] == tab[1] and tab2[4] == tab[4])
@@ -539,7 +473,7 @@ print('+')
 
 a = {}
 for i=1,1000 do
-  a[i] = i; a[i - 1] = undef
+  a[i] = i; a[i-1] = nil
 end
 assert(next(a,nil) == 1000 and next(a,1000) == nil)
 
@@ -572,12 +506,6 @@ do
   a = 0; for i=1.0, 0.99999, -1 do a=a+1 end; assert(a==1)
 end
 
-do   -- changing the control variable
-  local a
-  a = 0; for i = 1, 10 do a = a + 1; i = "x" end; assert(a == 10)
-  a = 0; for i = 10.0, 1, -1 do a = a + 1; i = "x" end; assert(a == 10)
-end
-
 -- conversion
 a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
 
@@ -635,69 +563,6 @@ do  -- checking types
 
 end
 
-
-do   -- testing other strange cases for numeric 'for'
-
-  local function checkfor (from, to, step, t)
-    local c = 0
-    for i = from, to, step do
-      c = c + 1
-      assert(i == t[c])
-    end
-    assert(c == #t)
-  end
-
-  local maxi = math.maxinteger
-  local mini = math.mininteger
-
-  checkfor(mini, maxi, maxi, {mini, -1, maxi - 1})
-
-  checkfor(mini, math.huge, maxi, {mini, -1, maxi - 1})
-
-  checkfor(maxi, mini, mini, {maxi, -1})
-
-  checkfor(maxi, mini, -maxi, {maxi, 0, -maxi})
-
-  checkfor(maxi, -math.huge, mini, {maxi, -1})
-
-  checkfor(maxi, mini, 1, {})
-  checkfor(mini, maxi, -1, {})
-
-  checkfor(maxi - 6, maxi, 3, {maxi - 6, maxi - 3, maxi})
-  checkfor(mini + 4, mini, -2, {mini + 4, mini + 2, mini})
-
-  local step = maxi // 10
-  local c = mini
-  for i = mini, maxi, step do
-    assert(i == c)
-    c = c + step
-  end
-
-  c = maxi
-  for i = maxi, mini, -step do
-    assert(i == c)
-    c = c - step
-  end
-
-  checkfor(maxi, maxi, maxi, {maxi})
-  checkfor(maxi, maxi, mini, {maxi})
-  checkfor(mini, mini, maxi, {mini})
-  checkfor(mini, mini, mini, {mini})
-end
-
-
-checkerror("'for' step is zero", function ()
-  for i = 1, 10, 0 do end
-end)
-
-checkerror("'for' step is zero", function ()
-  for i = 1, -10, 0 do end
-end)
-
-checkerror("'for' step is zero", function ()
-  for i = 1.0, -10, 0.0 do end
-end)
-
 collectgarbage()
 
 
@@ -705,8 +570,7 @@ collectgarbage()
 
 local function f (n, p)
   local t = {}; for i=1,p do t[i] = i*10 end
-  return function (_, n, ...)
-           assert(select("#", ...) == 0)  -- no extra arguments
+  return function (_,n)
            if n > 0 then
              n = n-1
              return n, table.unpack(t)
@@ -755,7 +619,7 @@ a[3] = 30
 -- testing ipairs with metamethods
 a = {n=10}
 setmetatable(a, { __index = function (t,k)
-                     if k <= t.n then return k * 10 end
+                     if k <= t.n then return k * 10 end 
                   end})
 i = 0
 for k,v in ipairs(a) do

testes/packtests

@@ -1,55 +0,0 @@
-NAME=$1"-tests"
-
-ln -s . $NAME
-ln -s .. ltests
-
-tar --create --gzip --no-recursion --file=$NAME.tar.gz  \
-$NAME/all.lua  \
-$NAME/api.lua  \
-$NAME/attrib.lua  \
-$NAME/big.lua  \
-$NAME/bitwise.lua  \
-$NAME/bwcoercion.lua  \
-$NAME/calls.lua  \
-$NAME/closure.lua  \
-$NAME/code.lua  \
-$NAME/constructs.lua  \
-$NAME/coroutine.lua  \
-$NAME/cstack.lua  \
-$NAME/db.lua  \
-$NAME/errors.lua  \
-$NAME/events.lua  \
-$NAME/files.lua  \
-$NAME/gc.lua  \
-$NAME/gengc.lua  \
-$NAME/goto.lua  \
-$NAME/heavy.lua  \
-$NAME/literals.lua  \
-$NAME/locals.lua  \
-$NAME/main.lua  \
-$NAME/math.lua  \
-$NAME/nextvar.lua  \
-$NAME/pm.lua  \
-$NAME/sort.lua  \
-$NAME/strings.lua  \
-$NAME/tpack.lua  \
-$NAME/tracegc.lua  \
-$NAME/utf8.lua  \
-$NAME/vararg.lua  \
-$NAME/verybig.lua  \
-$NAME/libs/makefile  \
-$NAME/libs/P1  \
-$NAME/libs/lib1.c  \
-$NAME/libs/lib11.c  \
-$NAME/libs/lib2.c \
-$NAME/libs/lib21.c  \
-$NAME/libs/lib22.c  \
-$NAME/ltests/ltests.h \
-$NAME/ltests/ltests.c
-
-\rm -I $NAME
-\rm -I ltests
-
-echo ${NAME}.tar.gz" created"
-
-

testes/pm.lua

@@ -1,4 +1,4 @@
--- $Id: testes/pm.lua $
+-- $Id: pm.lua,v 1.48 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing pattern matching')
@@ -28,10 +28,10 @@ a,b = string.find('a\0a\0a\0a\0\0ab', '\0ab', 2);  -- finds at the end
 assert(a == 9 and b == 11);
 a,b = string.find('a\0a\0a\0a\0\0ab', 'b')    -- last position
 assert(a == 11 and b == 11)
-assert(not string.find('a\0a\0a\0a\0\0ab', 'b\0'))   -- check ending
-assert(not string.find('', '\0'))
+assert(string.find('a\0a\0a\0a\0\0ab', 'b\0') == nil)   -- check ending
+assert(string.find('', '\0') == nil)
 assert(string.find('alo123alo', '12') == 4)
-assert(not string.find('alo123alo', '^12'))
+assert(string.find('alo123alo', '^12') == nil)
 
 assert(string.match("aaab", ".*b") == "aaab")
 assert(string.match("aaa", ".*a") == "aaa")
@@ -57,17 +57,17 @@ assert(f('aaa', 'ab*a') == 'aa')
 assert(f('aba', 'ab*a') == 'aba')
 assert(f('aaab', 'a+') == 'aaa')
 assert(f('aaa', '^.+$') == 'aaa')
-assert(not f('aaa', 'b+'))
-assert(not f('aaa', 'ab+a'))
+assert(f('aaa', 'b+') == nil)
+assert(f('aaa', 'ab+a') == nil)
 assert(f('aba', 'ab+a') == 'aba')
 assert(f('a$a', '.$') == 'a')
 assert(f('a$a', '.%$') == 'a$')
 assert(f('a$a', '.$.') == 'a$a')
-assert(not f('a$a', '$$'))
-assert(not f('a$b', 'a$'))
+assert(f('a$a', '$$') == nil)
+assert(f('a$b', 'a$') == nil)
 assert(f('a$a', '$') == '')
 assert(f('', 'b*') == '')
-assert(not f('aaa', 'bb*'))
+assert(f('aaa', 'bb*') == nil)
 assert(f('aaab', 'a-') == '')
 assert(f('aaa', '^.-$') == 'aaa')
 assert(f('aabaaabaaabaaaba', 'b.*b') == 'baaabaaabaaab')
@@ -101,7 +101,7 @@ end
 assert(f1('alo alx 123 b\0o b\0o', '(..*) %1') == "b\0o b\0o")
 assert(f1('axz123= 4= 4 34', '(.+)=(.*)=%2 %1') == '3= 4= 4 3')
 assert(f1('=======', '^(=*)=%1$') == '=======')
-assert(not string.match('==========', '^([=]*)=%1$'))
+assert(string.match('==========', '^([=]*)=%1$') == nil)
 
 local function range (i, j)
   if i <= j then
@@ -109,7 +109,7 @@ local function range (i, j)
   end
 end
 
-local abc = string.char(range(0, 127)) .. string.char(range(128, 255));
+local abc = string.char(range(0, 255));
 
 assert(string.len(abc) == 256)
 
@@ -135,7 +135,7 @@ print('+');
 assert(string.match("alo xyzK", "(%w+)K") == "xyz")
 assert(string.match("254 K", "(%d*)K") == "")
 assert(string.match("alo ", "(%w*)$") == "")
-assert(not string.match("alo ", "(%w+)$"))
+assert(string.match("alo ", "(%w+)$") == nil)
 assert(string.find("(álo)", "%(á") == 1)
 local a, b, c, d, e = string.match("âlo alo", "^(((.).).* (%w*))$")
 assert(a == 'âlo alo' and b == 'âl' and c == 'â' and d == 'alo' and e == nil)
@@ -209,7 +209,7 @@ assert(s == r and t[1] == 1 and t[3] == 3 and t[7] == 4 and t[13] == 4)
 
 
 function isbalanced (s)
-  return not string.find(string.gsub(s, "%b()", ""), "[()]")
+  return string.find(string.gsub(s, "%b()", ""), "[()]") == nil
 end
 
 assert(isbalanced("(9 ((8))(\0) 7) \0\0 a b ()(c)() a"))
@@ -228,7 +228,7 @@ assert(t[1] == "first" and t[2] == "second" and t[3] == "word" and t.n == 3)
 t = {n=0}
 assert(string.gsub("first second word", "%w+",
          function (w) t.n=t.n+1; t[t.n] = w end, 2) == "first second word")
-assert(t[1] == "first" and t[2] == "second" and t[3] == undef)
+assert(t[1] == "first" and t[2] == "second" and t[3] == nil)
 
 checkerror("invalid replacement value %(a table%)",
             string.gsub, "alo", ".", {a = {}})
@@ -237,6 +237,18 @@ checkerror("invalid capture index %%0", string.gsub, "alo", "(%0)", "a")
 checkerror("invalid capture index %%1", string.gsub, "alo", "(%1)", "a")
 checkerror("invalid use of '%%'", string.gsub, "alo", ".", "%x")
 
+-- bug since 2.5 (C-stack overflow)
+do
+  local function f (size)
+    local s = string.rep("a", size)
+    local p = string.rep(".?", size)
+    return pcall(string.match, s, p)
+  end
+  local r, m = f(80)
+  assert(r and #m == 80)
+  r, m = f(200000)
+  assert(not r and string.find(m, "too complex"))
+end
 
 if not _soft then
   print("big strings")
@@ -297,35 +309,6 @@ for k,v in pairs(t) do assert(k+1 == v+0); a=a+1 end
 assert(a == 3)
 
 
-do   -- init parameter in gmatch
-  local s = 0
-  for k in string.gmatch("10 20 30", "%d+", 3) do
-    s = s + tonumber(k)
-  end
-  assert(s == 50)
-
-  s = 0
-  for k in string.gmatch("11 21 31", "%d+", -4) do
-    s = s + tonumber(k)
-  end
-  assert(s == 32)
-
-  -- there is an empty string at the end of the subject
-  s = 0
-  for k in string.gmatch("11 21 31", "%w*", 9) do
-    s = s + 1
-  end
-  assert(s == 1)
-
-  -- there are no empty strings after the end of the subject
-  s = 0
-  for k in string.gmatch("11 21 31", "%w*", 10) do
-    s = s + 1
-  end
-  assert(s == 0)
-end
-
-
 -- tests for `%f' (`frontiers')
 
 assert(string.gsub("aaa aa a aaa a", "%f[%w]a", "x") == "xaa xa x xaa x")
@@ -387,35 +370,5 @@ assert(string.match("abc\0\0\0", "%\0%\0?") == "\0\0")
 assert(string.find("abc\0\0","\0.") == 4)
 assert(string.find("abcx\0\0abc\0abc","x\0\0abc\0a.") == 4)
 
-
-do   -- test reuse of original string in gsub
-  local s = string.rep("a", 100)
-  local r = string.gsub(s, "b", "c")   -- no match
-  assert(string.format("%p", s) == string.format("%p", r))
-
-  r = string.gsub(s, ".", {x = "y"})   -- no substitutions
-  assert(string.format("%p", s) == string.format("%p", r))
-
-  local count = 0
-  r = string.gsub(s, ".", function (x)
-                            assert(x == "a")
-                            count = count + 1
-                            return nil    -- no substitution
-                          end)
-  r = string.gsub(r, ".", {b = 'x'})   -- "a" is not a key; no subst.
-  assert(count == 100)
-  assert(string.format("%p", s) == string.format("%p", r))
-
-  count = 0
-  r = string.gsub(s, ".", function (x)
-                            assert(x == "a")
-                            count = count + 1
-                            return x    -- substitution...
-                          end)
-  assert(count == 100)
-  -- no reuse in this case
-  assert(r == s and string.format("%p", s) ~= string.format("%p", r))
-end
-
 print('OK')
 

testes/sort.lua

@@ -1,4 +1,4 @@
--- $Id: testes/sort.lua $
+-- $Id: sort.lua,v 1.38 2016/11/07 13:11:28 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print "testing (parts of) table library"
@@ -79,7 +79,7 @@ end
 print "testing pack"
 
 a = table.pack()
-assert(a[1] == undef and a.n == 0) 
+assert(a[1] == nil and a.n == 0) 
 
 a = table.pack(table)
 assert(a[1] == table and a.n == 1)

testes/strings.lua

@@ -1,10 +1,9 @@
--- $Id: testes/strings.lua $
+-- $Id: strings.lua,v 1.87 2016/12/21 19:23:02 roberto Exp $
 -- See Copyright Notice in file all.lua
 
 print('testing strings and string library')
 
-local maxi <const> = math.maxinteger
-local mini <const> = math.mininteger
+local maxi, mini = math.maxinteger, math.mininteger
 
 
 local function checkerror (msg, f, ...)
@@ -56,13 +55,13 @@ a,b = string.find("123456789", "345")
 assert(string.sub("123456789", a, b) == "345")
 assert(string.find("1234567890123456789", "345", 3) == 3)
 assert(string.find("1234567890123456789", "345", 4) == 13)
-assert(not string.find("1234567890123456789", "346", 4))
+assert(string.find("1234567890123456789", "346", 4) == nil)
 assert(string.find("1234567890123456789", ".45", -9) == 13)
-assert(not string.find("abcdefg", "\0", 5, 1))
+assert(string.find("abcdefg", "\0", 5, 1) == nil)
 assert(string.find("", "") == 1)
 assert(string.find("", "", 1) == 1)
 assert(not string.find("", "", 2))
-assert(not string.find('', 'aaa', 1))
+assert(string.find('', 'aaa', 1) == nil)
 assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
 
 assert(string.len("") == 0)
@@ -95,11 +94,6 @@ assert(string.char(string.byte("\xe4l\0
 assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
 assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
 
-checkerror("out of range", string.char, 256)
-checkerror("out of range", string.char, -1)
-checkerror("out of range", string.char, math.maxinteger)
-checkerror("out of range", string.char, math.mininteger)
-
 assert(string.upper("ab\0c") == "AB\0C")
 assert(string.lower("\0ABCc%$") == "\0abcc%$")
 assert(string.rep('teste', 0) == '')
@@ -154,43 +148,6 @@ else   -- compatible coercion
   assert(tostring(-1203 + 0.0) == "-1203")
 end
 
-do  -- tests for '%p' format
-  -- not much to test, as C does not specify what '%p' does.
-  -- ("The value of the pointer is converted to a sequence of printing
-  -- characters, in an implementation-defined manner.")
-  local null = "(null)"    -- nulls are formatted by Lua
-  assert(string.format("%p", 4) == null)
-  assert(string.format("%p", true) == null)
-  assert(string.format("%p", nil) == null)
-  assert(string.format("%p", {}) ~= null)
-  assert(string.format("%p", print) ~= null)
-  assert(string.format("%p", coroutine.running()) ~= null)
-  assert(string.format("%p", io.stdin) ~= null)
-  assert(string.format("%p", io.stdin) == string.format("%p", io.stdin))
-  assert(string.format("%p", print) == string.format("%p", print))
-  assert(string.format("%p", print) ~= string.format("%p", assert))
-
-  assert(#string.format("%90p", {}) == 90)
-  assert(#string.format("%-60p", {}) == 60)
-  assert(string.format("%10p", false) == string.rep(" ", 10 - #null) .. null)
-  assert(string.format("%-12p", 1.5) == null .. string.rep(" ", 12 - #null))
-
-  do
-    local t1 = {}; local t2 = {}
-    assert(string.format("%p", t1) ~= string.format("%p", t2))
-  end
-
-  do     -- short strings are internalized
-    local s1 = string.rep("a", 10)
-    local s2 = string.rep("aa", 5)
-  assert(string.format("%p", s1) == string.format("%p", s2))
-  end
-
-  do     -- long strings aren't internalized
-    local s1 = string.rep("a", 300); local s2 = string.rep("a", 300)
-    assert(string.format("%p", s1) ~= string.format("%p", s2))
-  end
-end
 
 x = '"ílo"\n\\'
 assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
@@ -229,15 +186,11 @@ do
   checkQ(true)
   checkQ(nil)
   checkQ(false)
-  checkQ(math.huge)
-  checkQ(-math.huge)
-  assert(string.format("%q", 0/0) == "(0/0)")   -- NaN
   checkerror("no literal", string.format, "%q", {})
 end
 
 assert(string.format("\0%s\0", "\0\0\1") == "\0\0\0\1\0")
 checkerror("contains zeros", string.format, "%10s", "\0")
-checkerror("cannot have modifiers", string.format, "%10q", "1")
 
 -- format x tostring
 assert(string.format("%s %s", nil, true) == "nil true")
@@ -271,12 +224,6 @@ do    -- longest number that can be formatted
   local s = string.format('%.99f', -(10^i))
   assert(string.len(s) >= i + 101)
   assert(tonumber(s) == -(10^i))
-
-  -- limit for floats
-  assert(10^38 < math.huge)
-  local s = string.format('%.99f', -(10^38))
-  assert(string.len(s) >= 38 + 101)
-  assert(tonumber(s) == -(10^38))
 end
 
 
@@ -352,7 +299,7 @@ check("%100.3d", "too long")
 check("%1"..aux..".3d", "too long")
 check("%1.100d", "too long")
 check("%10.1"..aux.."004d", "too long")
-check("%t", "invalid conversion")
+check("%t", "invalid option")
 check("%"..aux.."d", "repeated flags")
 check("%d %d", "no value")
 
@@ -361,9 +308,6 @@ assert(load("return 1\n--comment without ending EOL")() == 1)
 
 
 checkerror("table expected", table.concat, 3)
-checkerror("at index " .. maxi, table.concat, {}, " ", maxi, maxi)
--- '%' escapes following minus signal
-checkerror("at index %" .. mini, table.concat, {}, " ", mini, mini)
 assert(table.concat{} == "")
 assert(table.concat({}, 'x') == "")
 assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
@@ -431,68 +375,5 @@ do
   assert(co() == "2")
 end
 
-
-if T==nil then
-  (Message or print)
-     ("\n >>> testC not active: skipping 'pushfstring' tests <<<\n")
-else
-
-  print"testing 'pushfstring'"
-
-  -- formats %U, %f, %I already tested elsewhere
-
-  local blen = 200    -- internal buffer length in 'luaO_pushfstring'
-
-  local function callpfs (op, fmt, n)
-    local x = {T.testC("pushfstring" .. op .. "; return *", fmt, n)}
-    -- stack has code, 'fmt', 'n', and result from operation
-    assert(#x == 4)  -- make sure nothing else was left in the stack
-    return x[4]
-  end
-
-  local function testpfs (op, fmt, n)
-    assert(callpfs(op, fmt, n) == string.format(fmt, n))
-  end
-
-  testpfs("I", "", 0)
-  testpfs("I", string.rep("a", blen - 1), 0)
-  testpfs("I", string.rep("a", blen), 0)
-  testpfs("I", string.rep("a", blen + 1), 0)
-
-  local str = string.rep("ab", blen) .. "%d" .. string.rep("d", blen / 2)
-  testpfs("I", str, 2^14)
-  testpfs("I", str, -2^15)
-
-  str = "%d" .. string.rep("cd", blen)
-  testpfs("I", str, 2^14)
-  testpfs("I", str, -2^15)
-
-  str = string.rep("c", blen - 2) .. "%d"
-  testpfs("I", str, 2^14)
-  testpfs("I", str, -2^15)
-
-  for l = 12, 14 do
-    local str1 = string.rep("a", l)
-    for i = 0, 500, 13 do
-      for j = 0, 500, 13 do
-        str = string.rep("a", i) .. "%s" .. string.rep("d", j)
-        testpfs("S", str, str1)
-        testpfs("S", str, str)
-      end
-    end
-  end
-
-  str = "abc %c def"
-  testpfs("I", str, string.byte("A"))
-  testpfs("I", str, 255)
-
-  str = string.rep("a", blen - 1) .. "%p" .. string.rep("cd", blen)
-  testpfs("P", str, {})
-
-  str = string.rep("%%", 3 * blen) .. "%p" .. string.rep("%%", 2 * blen)
-  testpfs("P", str, {})
-end
-
-
 print('OK')