corrected year (2014 -> 2015) for release 5.2.4.

their stack space

lapi.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h,v 2.8 2014/07/15 21:26:50 roberto Exp roberto $
+** $Id: lapi.h,v 2.7 2009/11/27 15:37:59 roberto Exp $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */

lauxlib.c

@@ -1,14 +1,9 @@
 /*
-** $Id: lauxlib.c,v 1.283 2015/10/06 16:10:22 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.248 2013/03/21 13:54:57 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
 
-#define lauxlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <errno.h>
 #include <stdarg.h>
@@ -21,6 +16,9 @@
 ** Any function declared here could be written as an application function.
 */
 
+#define lauxlib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -33,8 +31,8 @@
 */
 
 
-#define LEVELS1	10	/* size of the first part of the stack */
-#define LEVELS2	11	/* size of the second part of the stack */
+#define LEVELS1	12	/* size of the first part of the stack */
+#define LEVELS2	10	/* size of the second part of the stack */
 
 
 
@@ -66,20 +64,11 @@ static int findfield (lua_State *L, int objidx, int level) {
 }
 
 
-/*
-** Search for a name for a function in all loaded modules
-** (registry._LOADED).
-*/
 static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
   int top = lua_gettop(L);
   lua_getinfo(L, "f", ar);  /* push function */
-  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  lua_pushglobaltable(L);
   if (findfield(L, top + 1, 2)) {
-    const char *name = lua_tostring(L, -1);
-    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);  /* move name to proper place */
     lua_pop(L, 2);  /* remove pushed values */
     return 1;
@@ -92,22 +81,24 @@ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
 
 
 static void pushfuncname (lua_State *L, lua_Debug *ar) {
-  if (pushglobalfuncname(L, ar)) {  /* try first a global name */
-    lua_pushfstring(L, "function '%s'", lua_tostring(L, -1));
-    lua_remove(L, -2);  /* remove name */
-  }
-  else if (*ar->namewhat != '\0')  /* is there a name from code? */
-    lua_pushfstring(L, "%s '%s'", ar->namewhat, ar->name);  /* use it */
+  if (*ar->namewhat != '\0')  /* is there a name? */
+    lua_pushfstring(L, "function " LUA_QS, ar->name);
   else if (*ar->what == 'm')  /* main? */
       lua_pushliteral(L, "main chunk");
-  else if (*ar->what != 'C')  /* for Lua functions, use <file:line> */
+  else if (*ar->what == 'C') {
+    if (pushglobalfuncname(L, ar)) {
+      lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1));
+      lua_remove(L, -2);  /* remove name */
+    }
+    else
+      lua_pushliteral(L, "?");
+  }
+  else
     lua_pushfstring(L, "function <%s:%d>", ar->short_src, ar->linedefined);
-  else  /* nothing left... */
-    lua_pushliteral(L, "?");
 }
 
 
-static int lastlevel (lua_State *L) {
+static int countlevels (lua_State *L) {
   lua_Debug ar;
   int li = 1, le = 1;
   /* find an upper bound */
@@ -126,16 +117,14 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
                                 const char *msg, int level) {
   lua_Debug ar;
   int top = lua_gettop(L);
-  int last = lastlevel(L1);
-  int n1 = (last - level > LEVELS1 + LEVELS2) ? LEVELS1 : -1;
-  if (msg)
-    lua_pushfstring(L, "%s\n", msg);
-  luaL_checkstack(L, 10, NULL);
+  int numlevels = countlevels(L1);
+  int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0;
+  if (msg) lua_pushfstring(L, "%s\n", msg);
   lua_pushliteral(L, "stack traceback:");
   while (lua_getstack(L1, level++, &ar)) {
-    if (n1-- == 0) {  /* too many levels? */
+    if (level == mark) {  /* too many levels? */
       lua_pushliteral(L, "\n\t...");  /* add a '...' */
-      level = last - LEVELS2 + 1;  /* and skip to last ones */
+      level = numlevels - LEVELS2;  /* and skip to last ones */
     }
     else {
       lua_getinfo(L1, "Slnt", &ar);
@@ -161,40 +150,33 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
 ** =======================================================
 */
 
-LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) {
+LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
   lua_Debug ar;
   if (!lua_getstack(L, 0, &ar))  /* no stack frame? */
-    return luaL_error(L, "bad argument #%d (%s)", arg, extramsg);
+    return luaL_error(L, "bad argument #%d (%s)", narg, extramsg);
   lua_getinfo(L, "n", &ar);
   if (strcmp(ar.namewhat, "method") == 0) {
-    arg--;  /* do not count 'self' */
-    if (arg == 0)  /* error is in the self argument itself? */
-      return luaL_error(L, "calling '%s' on bad self (%s)",
+    narg--;  /* do not count `self' */
+    if (narg == 0)  /* error is in the self argument itself? */
+      return luaL_error(L, "calling " LUA_QS " on bad self (%s)",
                            ar.name, extramsg);
   }
   if (ar.name == NULL)
     ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
-  return luaL_error(L, "bad argument #%d to '%s' (%s)",
-                        arg, ar.name, extramsg);
+  return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)",
+                        narg, ar.name, extramsg);
 }
 
 
-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)
-    typearg = lua_tostring(L, -1);  /* use the given type name */
-  else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA)
-    typearg = "light userdata";  /* special name for messages */
-  else
-    typearg = luaL_typename(L, arg);  /* standard name */
-  msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg);
-  return luaL_argerror(L, arg, msg);
+static int typeerror (lua_State *L, int narg, const char *tname) {
+  const char *msg = lua_pushfstring(L, "%s expected, got %s",
+                                    tname, luaL_typename(L, narg));
+  return luaL_argerror(L, narg, msg);
 }
 
 
-static void tag_error (lua_State *L, int arg, int tag) {
-  typeerror(L, arg, lua_typename(L, tag));
+static void tag_error (lua_State *L, int narg, int tag) {
+  typeerror(L, narg, lua_typename(L, tag));
 }
 
 
@@ -240,7 +222,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 }
 
 
-#if !defined(l_inspectstat)	/* { */
+#if !defined(inspectstat)	/* { */
 
 #if defined(LUA_USE_POSIX)
 
@@ -249,13 +231,13 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 /*
 ** use appropriate macros to interpret 'pclose' return status
 */
-#define l_inspectstat(stat,what)  \
+#define inspectstat(stat,what)  \
    if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \
    else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; }
 
 #else
 
-#define l_inspectstat(stat,what)  /* no op */
+#define inspectstat(stat,what)  /* no op */
 
 #endif
 
@@ -267,7 +249,7 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) {
   if (stat == -1)  /* error? */
     return luaL_fileresult(L, 0, NULL);
   else {
-    l_inspectstat(stat, what);  /* interpret result */
+    inspectstat(stat, what);  /* interpret result */
     if (*what == 'e' && stat == 0)  /* successful termination? */
       lua_pushboolean(L, 1);
     else
@@ -288,12 +270,11 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) {
 */
 
 LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
-  if (luaL_getmetatable(L, tname) != LUA_TNIL)  /* name already in use? */
+  luaL_getmetatable(L, tname);  /* try to get metatable */
+  if (!lua_isnil(L, -1))  /* name already in use? */
     return 0;  /* leave previous value on top, but return 0 */
   lua_pop(L, 1);
-  lua_createtable(L, 0, 2);  /* create metatable */
-  lua_pushstring(L, tname);
-  lua_setfield(L, -2, "__name");  /* metatable.__name = tname */
+  lua_newtable(L);  /* create metatable */
   lua_pushvalue(L, -1);
   lua_setfield(L, LUA_REGISTRYINDEX, tname);  /* registry.name = metatable */
   return 1;
@@ -336,16 +317,16 @@ LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
 ** =======================================================
 */
 
-LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
+LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
                                  const char *const lst[]) {
-  const char *name = (def) ? luaL_optstring(L, arg, def) :
-                             luaL_checkstring(L, arg);
+  const char *name = (def) ? luaL_optstring(L, narg, def) :
+                             luaL_checkstring(L, narg);
   int i;
   for (i=0; lst[i]; i++)
     if (strcmp(lst[i], name) == 0)
       return i;
-  return luaL_argerror(L, arg,
-                       lua_pushfstring(L, "invalid option '%s'", name));
+  return luaL_argerror(L, narg,
+                       lua_pushfstring(L, "invalid option " LUA_QS, name));
 }
 
 
@@ -361,71 +342,77 @@ 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 (lua_type(L, arg) != t)
-    tag_error(L, arg, t);
+LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
+  if (lua_type(L, narg) != t)
+    tag_error(L, narg, t);
 }
 
 
-LUALIB_API void luaL_checkany (lua_State *L, int arg) {
-  if (lua_type(L, arg) == LUA_TNONE)
-    luaL_argerror(L, arg, "value expected");
+LUALIB_API void luaL_checkany (lua_State *L, int narg) {
+  if (lua_type(L, narg) == LUA_TNONE)
+    luaL_argerror(L, narg, "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 (!s) tag_error(L, arg, LUA_TSTRING);
+LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
+  const char *s = lua_tolstring(L, narg, len);
+  if (!s) tag_error(L, narg, LUA_TSTRING);
   return s;
 }
 
 
-LUALIB_API const char *luaL_optlstring (lua_State *L, int arg,
+LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
                                         const char *def, size_t *len) {
-  if (lua_isnoneornil(L, arg)) {
+  if (lua_isnoneornil(L, narg)) {
     if (len)
       *len = (def ? strlen(def) : 0);
     return def;
   }
-  else return luaL_checklstring(L, arg, len);
+  else return luaL_checklstring(L, narg, len);
 }
 
 
-LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {
+LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
   int isnum;
-  lua_Number d = lua_tonumberx(L, arg, &isnum);
+  lua_Number d = lua_tonumberx(L, narg, &isnum);
   if (!isnum)
-    tag_error(L, arg, LUA_TNUMBER);
+    tag_error(L, narg, LUA_TNUMBER);
   return d;
 }
 
 
-LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) {
-  return luaL_opt(L, luaL_checknumber, arg, def);
+LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
+  return luaL_opt(L, luaL_checknumber, narg, def);
 }
 
 
-static void interror (lua_State *L, int arg) {
-  if (lua_isnumber(L, arg))
-    luaL_argerror(L, arg, "number has no integer representation");
-  else
-    tag_error(L, arg, LUA_TNUMBER);
-}
-
-
-LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
+LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
   int isnum;
-  lua_Integer d = lua_tointegerx(L, arg, &isnum);
-  if (!isnum) {
-    interror(L, arg);
-  }
+  lua_Integer d = lua_tointegerx(L, narg, &isnum);
+  if (!isnum)
+    tag_error(L, narg, LUA_TNUMBER);
   return d;
 }
 
 
-LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
+LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) {
+  int isnum;
+  lua_Unsigned d = lua_tounsignedx(L, narg, &isnum);
+  if (!isnum)
+    tag_error(L, narg, LUA_TNUMBER);
+  return d;
+}
+
+
+LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
                                                       lua_Integer def) {
-  return luaL_opt(L, luaL_checkinteger, arg, def);
+  return luaL_opt(L, luaL_checkinteger, narg, def);
+}
+
+
+LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg,
+                                                        lua_Unsigned def) {
+  return luaL_opt(L, luaL_checkunsigned, narg, def);
 }
 
 /* }====================================================== */
@@ -437,47 +424,6 @@ LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
 ** =======================================================
 */
 
-/* userdata to box arbitrary data */
-typedef struct UBox {
-  void *box;
-  size_t bsize;
-} UBox;
-
-
-static void *resizebox (lua_State *L, int idx, size_t newsize) {
-  void *ud;
-  lua_Alloc allocf = lua_getallocf(L, &ud);
-  UBox *box = (UBox *)lua_touserdata(L, idx);
-  void *temp = allocf(ud, box->box, box->bsize, newsize);
-  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;
-  return temp;
-}
-
-
-static int boxgc (lua_State *L) {
-  resizebox(L, 1, 0);
-  return 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, "LUABOX")) {  /* creating metatable? */
-    lua_pushcfunction(L, boxgc);
-    lua_setfield(L, -2, "__gc");  /* metatable.__gc = boxgc */
-  }
-  lua_setmetatable(L, -2);
-  return resizebox(L, -1, newsize);
-}
-
-
 /*
 ** check whether buffer is using a userdata on the stack as a temporary
 ** buffer
@@ -498,12 +444,11 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
     if (newsize < B->n || newsize - B->n < sz)
       luaL_error(L, "buffer too large");
     /* create larger buffer */
+    newbuff = (char *)lua_newuserdata(L, newsize * sizeof(char));
+    /* move content to new buffer */
+    memcpy(newbuff, B->b, B->n * sizeof(char));
     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 */
-    }
+      lua_remove(L, -2);  /* remove old buffer */
     B->b = newbuff;
     B->size = newsize;
   }
@@ -512,11 +457,9 @@ 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) {
-  if (l > 0) {  /* avoid 'memcpy' when 's' can be NULL */
-    char *b = luaL_prepbuffsize(B, l);
-    memcpy(b, s, l * sizeof(char));
-    luaL_addsize(B, l);
-  }
+  char *b = luaL_prepbuffsize(B, l);
+  memcpy(b, s, l * sizeof(char));
+  luaL_addsize(B, l);
 }
 
 
@@ -528,10 +471,8 @@ LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
 LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
   lua_State *L = B->L;
   lua_pushlstring(L, B->b, B->n);
-  if (buffonstack(B)) {
-    resizebox(L, -2, 0);  /* delete old buffer */
-    lua_remove(L, -2);  /* remove its header from the stack */
-  }
+  if (buffonstack(B))
+    lua_remove(L, -2);  /* remove old buffer */
 }
 
 
@@ -582,7 +523,7 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
   int ref;
   if (lua_isnil(L, -1)) {
     lua_pop(L, 1);  /* remove from stack */
-    return LUA_REFNIL;  /* 'nil' has a unique fixed reference */
+    return LUA_REFNIL;  /* `nil' has a unique fixed reference */
   }
   t = lua_absindex(L, t);
   lua_rawgeti(L, t, freelist);  /* get first free element */
@@ -621,7 +562,7 @@ LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
 typedef struct LoadF {
   int n;  /* number of pre-read characters */
   FILE *f;  /* file being read */
-  char buff[BUFSIZ];  /* area for reading file */
+  char buff[LUAL_BUFFERSIZE];  /* area for reading file */
 } LoadF;
 
 
@@ -653,7 +594,7 @@ static int errfile (lua_State *L, const char *what, int fnameindex) {
 
 
 static int skipBOM (LoadF *lf) {
-  const char *p = "\xEF\xBB\xBF";  /* UTF-8 BOM mark */
+  const char *p = "\xEF\xBB\xBF";  /* Utf8 BOM mark */
   int c;
   lf->n = 0;
   do {
@@ -714,7 +655,7 @@ LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
   readstatus = ferror(lf.f);
   if (filename) fclose(lf.f);  /* close file (even in case of errors) */
   if (readstatus) {
-    lua_settop(L, fnameindex);  /* ignore results from 'lua_load' */
+    lua_settop(L, fnameindex);  /* ignore results from `lua_load' */
     return errfile(L, "read", fnameindex);
   }
   lua_remove(L, fnameindex);
@@ -757,23 +698,23 @@ LUALIB_API int luaL_loadstring (lua_State *L, const char *s) {
 
 LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
   if (!lua_getmetatable(L, obj))  /* no metatable? */
-    return LUA_TNIL;
+    return 0;
+  lua_pushstring(L, event);
+  lua_rawget(L, -2);
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 2);  /* remove metatable and metafield */
+    return 0;
+  }
   else {
-    int tt;
-    lua_pushstring(L, event);
-    tt = lua_rawget(L, -2);
-    if (tt == LUA_TNIL)  /* is metafield nil? */
-      lua_pop(L, 2);  /* remove metatable and metafield */
-    else
-      lua_remove(L, -2);  /* remove only metatable */
-    return tt;  /* return metafield type */
+    lua_remove(L, -2);  /* remove only metatable */
+    return 1;
   }
 }
 
 
 LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
   obj = lua_absindex(L, obj);
-  if (luaL_getmetafield(L, obj, event) == LUA_TNIL)  /* no metafield? */
+  if (!luaL_getmetafield(L, obj, event))  /* no metafield? */
     return 0;
   lua_pushvalue(L, obj);
   lua_call(L, 1, 1);
@@ -781,13 +722,13 @@ LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
 }
 
 
-LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
-  lua_Integer l;
+LUALIB_API int luaL_len (lua_State *L, int idx) {
+  int l;
   int isnum;
   lua_len(L, idx);
-  l = lua_tointegerx(L, -1, &isnum);
+  l = (int)lua_tointegerx(L, -1, &isnum);
   if (!isnum)
-    luaL_error(L, "object length is not an integer");
+    luaL_error(L, "object length is not a number");
   lua_pop(L, 1);  /* remove object */
   return l;
 }
@@ -796,13 +737,7 @@ LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
 LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
   if (!luaL_callmeta(L, idx, "__tostring")) {  /* no metafield? */
     switch (lua_type(L, idx)) {
-      case LUA_TNUMBER: {
-        if (lua_isinteger(L, idx))
-          lua_pushfstring(L, "%I", lua_tointeger(L, idx));
-        else
-          lua_pushfstring(L, "%f", lua_tonumber(L, idx));
-        break;
-      }
+      case LUA_TNUMBER:
       case LUA_TSTRING:
         lua_pushvalue(L, idx);
         break;
@@ -837,7 +772,8 @@ static const char *luaL_findtable (lua_State *L, int idx,
     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_rawget(L, -2);
+    if (lua_isnil(L, -1)) {  /* 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);
@@ -874,12 +810,13 @@ static int libsize (const luaL_Reg *l) {
 LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
                                  int sizehint) {
   luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
-  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no _LOADED[modname]? */
+  lua_getfield(L, -1, modname);  /* get _LOADED[modname] */
+  if (!lua_istable(L, -1)) {  /* not found? */
     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);
+      luaL_error(L, "name conflict for module " LUA_QS, modname);
     lua_pushvalue(L, -1);
     lua_setfield(L, -3, modname);  /* _LOADED[modname] = new table */
   }
@@ -909,6 +846,7 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
 ** Returns with only the table at the stack.
 */
 LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
+  luaL_checkversion(L);
   luaL_checkstack(L, nup, "too many upvalues");
   for (; l->name != NULL; l++) {  /* fill the table with given functions */
     int i;
@@ -926,8 +864,8 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
 ** into the stack
 */
 LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
-  if (lua_getfield(L, idx, fname) == LUA_TTABLE)
-    return 1;  /* table already there */
+  lua_getfield(L, idx, fname);
+  if (lua_istable(L, -1)) return 1;  /* table already there */
   else {
     lua_pop(L, 1);  /* remove previous result */
     idx = lua_absindex(L, idx);
@@ -940,26 +878,22 @@ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
 
 
 /*
-** Stripped-down 'require': After checking "loaded" table, calls 'openf'
-** to open a module, registers the result in 'package.loaded' table and,
-** if 'glb' is true, also registers the result in the global table.
+** stripped-down 'require'. Calls 'openf' to open a module,
+** registers the result in 'package.loaded' table and, if 'glb'
+** is true, also registers the result in the global table.
 ** Leaves resulting module on the top.
 */
 LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
                                lua_CFunction openf, int glb) {
+  lua_pushcfunction(L, openf);
+  lua_pushstring(L, modname);  /* argument to open function */
+  lua_call(L, 1, 1);  /* open module */
   luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, -1, modname);  /* _LOADED[modname] */
-  if (!lua_toboolean(L, -1)) {  /* package not already loaded? */
-    lua_pop(L, 1);  /* remove field */
-    lua_pushcfunction(L, openf);
-    lua_pushstring(L, modname);  /* argument to open function */
-    lua_call(L, 1, 1);  /* call 'openf' to open module */
-    lua_pushvalue(L, -1);  /* make copy of module (call result) */
-    lua_setfield(L, -3, modname);  /* _LOADED[modname] = module */
-  }
-  lua_remove(L, -2);  /* remove _LOADED table */
+  lua_pushvalue(L, -2);  /* make copy of module (call result) */
+  lua_setfield(L, -2, modname);  /* _LOADED[modname] = module */
+  lua_pop(L, 1);  /* remove _LOADED table */
   if (glb) {
-    lua_pushvalue(L, -1);  /* copy of module */
+    lua_pushvalue(L, -1);  /* copy of 'mod' */
     lua_setglobal(L, modname);  /* _G[modname] = module */
   }
 }
@@ -974,7 +908,7 @@ LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *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' */
+    s = wild + l;  /* continue after `p' */
   }
   luaL_addstring(&b, s);  /* push last suffix */
   luaL_pushresult(&b);
@@ -994,8 +928,8 @@ static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
 
 
 static int panic (lua_State *L) {
-  lua_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
-                        lua_tostring(L, -1));
+  luai_writestringerror("PANIC: unprotected error in call to Lua API (%s)\n",
+                   lua_tostring(L, -1));
   return 0;  /* return to Lua to abort */
 }
 
@@ -1007,14 +941,19 @@ LUALIB_API lua_State *luaL_newstate (void) {
 }
 
 
-LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
+LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) {
   const lua_Number *v = lua_version(L);
-  if (sz != LUAL_NUMSIZES)  /* check numeric types */
-    luaL_error(L, "core and library have incompatible numeric types");
   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",
                   ver, *v);
+  /* check conversions number -> integer types */
+  lua_pushnumber(L, -(lua_Number)0x1234);
+  if (lua_tointeger(L, -1) != -0x1234 ||
+      lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234)
+    luaL_error(L, "bad conversion number->int;"
+                  " must recompile Lua with proper settings");
+  lua_pop(L, 1);
 }
 

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.128 2014/10/29 16:11:17 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.120 2011/11/29 15:55:08 roberto Exp $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -16,7 +16,7 @@
 
 
 
-/* extra error code for 'luaL_load' */
+/* extra error code for `luaL_load' */
 #define LUA_ERRFILE     (LUA_ERRERR+1)
 
 
@@ -26,30 +26,30 @@ typedef struct luaL_Reg {
 } luaL_Reg;
 
 
-#define LUAL_NUMSIZES	(sizeof(lua_Integer)*16 + sizeof(lua_Number))
-
-LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
-#define luaL_checkversion(L)  \
-	  luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
+LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver);
+#define luaL_checkversion(L)	luaL_checkversion_(L, LUA_VERSION_NUM)
 
 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 const char *(luaL_checklstring) (lua_State *L, int arg,
+LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
+LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
                                                           size_t *l);
-LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
+LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
                                           const char *def, size_t *l);
-LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
-LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
+LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
+LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
 
-LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
-LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
+LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
+LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
                                           lua_Integer def);
+LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int numArg);
+LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int numArg,
+                                            lua_Unsigned def);
 
 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
-LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
-LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
+LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
+LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
 
 LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
 LUALIB_API void  (luaL_setmetatable) (lua_State *L, const char *tname);
@@ -59,13 +59,13 @@ LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
 LUALIB_API void (luaL_where) (lua_State *L, int lvl);
 LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
 
-LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
+LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
                                    const char *const lst[]);
 
 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 */
+/* pre-defined references */
 #define LUA_NOREF       (-2)
 #define LUA_REFNIL      (-1)
 
@@ -83,7 +83,7 @@ LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
 
 LUALIB_API lua_State *(luaL_newstate) (void);
 
-LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
+LUALIB_API int (luaL_len) (lua_State *L, int idx);
 
 LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
                                                   const char *r);
@@ -108,13 +108,16 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
 #define luaL_newlibtable(L,l)	\
   lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
 
-#define luaL_newlib(L,l)  \
-  (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
+#define luaL_newlib(L,l)	(luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
 
-#define luaL_argcheck(L, cond,arg,extramsg)	\
-		((void)((cond) || luaL_argerror(L, (arg), (extramsg))))
+#define luaL_argcheck(L, cond,numarg,extramsg)	\
+		((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
 #define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
 #define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
+#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
+#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
+#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
+#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
 
 #define luaL_typename(L,i)	lua_typename(L, lua_type(L,(i)))
 
@@ -204,53 +207,6 @@ LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
 #endif
 
 
-/*
-** {==================================================================
-** "Abstraction Layer" for basic report of messages and errors
-** ===================================================================
-*/
-
-/* print a string */
-#if !defined(lua_writestring)
-#define lua_writestring(s,l)   fwrite((s), sizeof(char), (l), stdout)
-#endif
-
-/* print a newline and flush the output */
-#if !defined(lua_writeline)
-#define lua_writeline()        (lua_writestring("\n", 1), fflush(stdout))
-#endif
-
-/* print an error message */
-#if !defined(lua_writestringerror)
-#define lua_writestringerror(s,p) \
-        (fprintf(stderr, (s), (p)), fflush(stderr))
-#endif
-
-/* }================================================================== */
-
-
-/*
-** {============================================================
-** Compatibility with deprecated conversions
-** =============================================================
-*/
-#if defined(LUA_COMPAT_APIINTCASTS)
-
-#define luaL_checkunsigned(L,a)	((lua_Unsigned)luaL_checkinteger(L,a))
-#define luaL_optunsigned(L,a,d)	\
-	((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
-
-#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
-#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
-
-#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
-#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
-
-#endif
-/* }============================================================ */
-
-
-
 #endif
 
 

lbaselib.c

@@ -1,13 +1,9 @@
 /*
-** $Id: lbaselib.c,v 1.311 2015/06/26 19:25:45 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.276 2013/02/21 13:44:53 roberto Exp $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
 
-#define lbaselib_c
-#define LUA_LIB
-
-#include "lprefix.h"
 
 
 #include <ctype.h>
@@ -15,6 +11,9 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define lbaselib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -33,74 +32,62 @@ static int luaB_print (lua_State *L) {
     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);
+      return luaL_error(L,
+         LUA_QL("tostring") " must return a string to " LUA_QL("print"));
+    if (i>1) luai_writestring("\t", 1);
+    luai_writestring(s, l);
     lua_pop(L, 1);  /* pop result */
   }
-  lua_writeline();
+  luai_writeline();
   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 signal */
-  else if (*s == '+') s++;
-  if (!isalnum((unsigned char)*s))  /* no digit? */
-    return NULL;
-  do {
-    int digit = (isdigit((unsigned char)*s)) ? *s - '0'
-                   : (toupper((unsigned char)*s) - 'A') + 10;
-    if (digit >= base) return NULL;  /* invalid numeral */
-    n = n * base + digit;
-    s++;
-  } while (isalnum((unsigned char)*s));
-  s += strspn(s, SPACECHARS);  /* skip trailing spaces */
-  *pn = (lua_Integer)((neg) ? (0u - n) : n);
-  return s;
-}
-
-
 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 */
+  if (lua_isnoneornil(L, 2)) {  /* standard conversion */
+    int isnum;
+    lua_Number n = lua_tonumberx(L, 1, &isnum);
+    if (isnum) {
+      lua_pushnumber(L, n);
       return 1;
-    }
-    else {
-      size_t l;
-      const char *s = lua_tolstring(L, 1, &l);
-      if (s != NULL && lua_stringtonumber(L, s) == l + 1)
-        return 1;  /* successful conversion to number */
-      /* else not a number */
-    }
+    }  /* else not a number; must be something */
+    luaL_checkany(L, 1);
   }
   else {
     size_t l;
-    const char *s;
-    lua_Integer n = 0;  /* to avoid warnings */
-    lua_Integer base = luaL_checkinteger(L, 2);
-    luaL_checktype(L, 1, LUA_TSTRING);  /* no numbers as strings */
-    s = lua_tolstring(L, 1, &l);
+    const char *s = luaL_checklstring(L, 1, &l);
+    const char *e = s + l;  /* end point for 's' */
+    int base = luaL_checkint(L, 2);
+    int neg = 0;
     luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
-    if (b_str2int(s, (int)base, &n) == s + l) {
-      lua_pushinteger(L, n);
-      return 1;
+    s += strspn(s, SPACECHARS);  /* skip initial spaces */
+    if (*s == '-') { s++; neg = 1; }  /* handle signal */
+    else if (*s == '+') s++;
+    if (isalnum((unsigned char)*s)) {
+      lua_Number n = 0;
+      do {
+        int digit = (isdigit((unsigned char)*s)) ? *s - '0'
+                       : toupper((unsigned char)*s) - 'A' + 10;
+        if (digit >= base) break;  /* invalid numeral; force a fail */
+        n = n * (lua_Number)base + (lua_Number)digit;
+        s++;
+      } while (isalnum((unsigned char)*s));
+      s += strspn(s, SPACECHARS);  /* skip trailing spaces */
+      if (s == e) {  /* no invalid trailing characters? */
+        lua_pushnumber(L, (neg) ? -n : n);
+        return 1;
+      }  /* else not a number */
     }  /* else not a number */
-  }  /* else not a number */
+  }
   lua_pushnil(L);  /* not a number */
   return 1;
 }
 
 
 static int luaB_error (lua_State *L) {
-  int level = (int)luaL_optinteger(L, 2, 1);
+  int level = luaL_optint(L, 2, 1);
   lua_settop(L, 1);
   if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
     luaL_where(L, level);
@@ -127,7 +114,7 @@ static int luaB_setmetatable (lua_State *L) {
   luaL_checktype(L, 1, LUA_TTABLE);
   luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
                     "nil or table expected");
-  if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)
+  if (luaL_getmetafield(L, 1, "__metatable"))
     return luaL_error(L, "cannot change a protected metatable");
   lua_settop(L, 2);
   lua_setmetatable(L, 1);
@@ -173,18 +160,19 @@ static int luaB_rawset (lua_State *L) {
 static int luaB_collectgarbage (lua_State *L) {
   static const char *const opts[] = {"stop", "restart", "collect",
     "count", "step", "setpause", "setstepmul",
-    "isrunning", NULL};
+    "setmajorinc", "isrunning", "generational", "incremental", NULL};
   static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
     LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
-    LUA_GCISRUNNING};
+    LUA_GCSETMAJORINC, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
   int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
-  int ex = (int)luaL_optinteger(L, 2, 0);
+  int ex = luaL_optint(L, 2, 0);
   int res = lua_gc(L, o, ex);
   switch (o) {
     case LUA_GCCOUNT: {
       int b = lua_gc(L, LUA_GCCOUNTB, 0);
-      lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024));
-      return 1;
+      lua_pushnumber(L, res + ((lua_Number)b/1024));
+      lua_pushinteger(L, b);
+      return 2;
     }
     case LUA_GCSTEP: case LUA_GCISRUNNING: {
       lua_pushboolean(L, res);
@@ -199,16 +187,15 @@ static int luaB_collectgarbage (lua_State *L) {
 
 
 static int luaB_type (lua_State *L) {
-  int t = lua_type(L, 1);
-  luaL_argcheck(L, t != LUA_TNONE, 1, "value expected");
-  lua_pushstring(L, lua_typename(L, t));
+  luaL_checkany(L, 1);
+  lua_pushstring(L, luaL_typename(L, 1));
   return 1;
 }
 
 
 static int pairsmeta (lua_State *L, const char *method, int iszero,
                       lua_CFunction iter) {
-  if (luaL_getmetafield(L, 1, method) == LUA_TNIL) {  /* no metamethod? */
+  if (!luaL_getmetafield(L, 1, method)) {  /* no metamethod? */
     luaL_checktype(L, 1, LUA_TTABLE);  /* argument must be a table */
     lua_pushcfunction(L, iter);  /* will return generator, */
     lua_pushvalue(L, 1);  /* state, */
@@ -240,31 +227,18 @@ static int luaB_pairs (lua_State *L) {
 }
 
 
-/*
-** Traversal function for 'ipairs'
-*/
 static int ipairsaux (lua_State *L) {
-  lua_Integer i = luaL_checkinteger(L, 2) + 1;
+  int i = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  i++;  /* next value */
   lua_pushinteger(L, i);
-  return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
+  lua_rawgeti(L, 1, i);
+  return (lua_isnil(L, -1)) ? 1 : 2;
 }
 
 
-/*
-** This function will use either 'ipairsaux' or 'ipairsaux_raw' to
-** traverse a table, depending on whether the table has metamethods
-** that can affect the traversal.
-*/
 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
 }
 
 
@@ -310,7 +284,7 @@ static int luaB_loadfile (lua_State *L) {
 
 
 /*
-** Reader for generic 'load' function: 'lua_load' uses the
+** Reader for generic `load' function: `lua_load' uses the
 ** stack for internal stuff, so the reader cannot change the
 ** stack top. Instead, it keeps its resulting string in a
 ** reserved slot inside the stack.
@@ -354,8 +328,7 @@ static int luaB_load (lua_State *L) {
 /* }====================================================== */
 
 
-static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
-  (void)d1;  (void)d2;  /* only to match 'lua_Kfunction' prototype */
+static int dofilecont (lua_State *L) {
   return lua_gettop(L) - 1;
 }
 
@@ -366,20 +339,14 @@ static int luaB_dofile (lua_State *L) {
   if (luaL_loadfile(L, fname) != LUA_OK)
     return lua_error(L);
   lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
-  return dofilecont(L, 0, 0);
+  return dofilecont(L);
 }
 
 
 static int luaB_assert (lua_State *L) {
-  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 */
-    lua_remove(L, 1);  /* remove it */
-    lua_pushliteral(L, "assertion failed!");  /* default message */
-    lua_settop(L, 1);  /* leave only message (default if no other one) */
-    return luaB_error(L);  /* call 'error' */
-  }
+  if (!lua_toboolean(L, 1))
+    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
+  return lua_gettop(L);
 }
 
 
@@ -390,57 +357,53 @@ static int luaB_select (lua_State *L) {
     return 1;
   }
   else {
-    lua_Integer i = luaL_checkinteger(L, 1);
+    int i = luaL_checkint(L, 1);
     if (i < 0) i = n + i;
     else if (i > n) i = n;
     luaL_argcheck(L, 1 <= i, 1, "index out of range");
-    return n - (int)i;
+    return n - i;
   }
 }
 
 
-/*
-** Continuation function for 'pcall' and 'xpcall'. Both functions
-** already pushed a 'true' before doing the call, so in case of success
-** 'finishpcall' only has to return everything in the stack minus
-** 'extra' values (where 'extra' is exactly the number of items to be
-** ignored).
-*/
-static int finishpcall (lua_State *L, int status, lua_KContext extra) {
-  if (status != LUA_OK && status != LUA_YIELD) {  /* error? */
-    lua_pushboolean(L, 0);  /* first result (false) */
-    lua_pushvalue(L, -2);  /* error message */
+static int finishpcall (lua_State *L, int status) {
+  if (!lua_checkstack(L, 1)) {  /* no space for extra boolean? */
+    lua_settop(L, 0);  /* create space for return values */
+    lua_pushboolean(L, 0);
+    lua_pushstring(L, "stack overflow");
     return 2;  /* return false, msg */
   }
-  else
-    return lua_gettop(L) - (int)extra;  /* return all results */
+  lua_pushboolean(L, status);  /* first result (status) */
+  lua_replace(L, 1);  /* put first result in first slot */
+  return lua_gettop(L);
+}
+
+
+static int pcallcont (lua_State *L) {
+  int status = lua_getctx(L, NULL);
+  return finishpcall(L, (status == LUA_YIELD));
 }
 
 
 static int luaB_pcall (lua_State *L) {
   int status;
   luaL_checkany(L, 1);
-  lua_pushboolean(L, 1);  /* first result if no errors */
-  lua_insert(L, 1);  /* put it in place */
-  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
-  return finishpcall(L, status, 0);
+  lua_pushnil(L);
+  lua_insert(L, 1);  /* create space for status result */
+  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, pcallcont);
+  return finishpcall(L, (status == LUA_OK));
 }
 
 
-/*
-** Do a protected call with error handling. After 'lua_rotate', the
-** stack will have <f, err, true, f, [args...]>; so, the function passes
-** 2 to 'finishpcall' to skip the 2 first values when returning results.
-*/
 static int luaB_xpcall (lua_State *L) {
   int status;
   int n = lua_gettop(L);
-  luaL_checktype(L, 2, LUA_TFUNCTION);  /* check error function */
-  lua_pushboolean(L, 1);  /* first result */
-  lua_pushvalue(L, 1);  /* function */
-  lua_rotate(L, 3, 2);  /* move them below function's arguments */
-  status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
-  return finishpcall(L, status, 2);
+  luaL_argcheck(L, n >= 2, 2, "value expected");
+  lua_pushvalue(L, 1);  /* exchange function... */
+  lua_copy(L, 2, 1);  /* ...and error handler */
+  lua_replace(L, 2);
+  status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 0, pcallcont);
+  return finishpcall(L, (status == LUA_OK));
 }
 
 
@@ -477,23 +440,19 @@ static const luaL_Reg base_funcs[] = {
   {"tostring", luaB_tostring},
   {"type", luaB_type},
   {"xpcall", luaB_xpcall},
-  /* placeholders */
-  {"_G", NULL},
-  {"_VERSION", NULL},
   {NULL, NULL}
 };
 
 
 LUAMOD_API int luaopen_base (lua_State *L) {
-  /* open lib into global table */
-  lua_pushglobaltable(L);
-  luaL_setfuncs(L, base_funcs, 0);
   /* set global _G */
-  lua_pushvalue(L, -1);
+  lua_pushglobaltable(L);
+  lua_pushglobaltable(L);
   lua_setfield(L, -2, "_G");
-  /* set global _VERSION */
+  /* open lib into global table */
+  luaL_setfuncs(L, base_funcs, 0);
   lua_pushliteral(L, LUA_VERSION);
-  lua_setfield(L, -2, "_VERSION");
+  lua_setfield(L, -2, "_VERSION");  /* set global _VERSION */
   return 1;
 }
 

lbitlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbitlib.c,v 1.29 2015/10/08 15:55:35 roberto Exp roberto $
+** $Id: lbitlib.c,v 1.18.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Standard library for bitwise operations
 ** See Copyright Notice in lua.h
 */
@@ -7,36 +7,20 @@
 #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)
 
@@ -45,25 +29,28 @@
 #define mask(n)		(~((ALLONES << 1) << ((n) - 1)))
 
 
+typedef lua_Unsigned b_uint;
 
-static lua_Unsigned andaux (lua_State *L) {
+
+
+static b_uint andaux (lua_State *L) {
   int i, n = lua_gettop(L);
-  lua_Unsigned r = ~(lua_Unsigned)0;
+  b_uint r = ~(b_uint)0;
   for (i = 1; i <= n; i++)
-    r &= checkunsigned(L, i);
+    r &= luaL_checkunsigned(L, i);
   return trim(r);
 }
 
 
 static int b_and (lua_State *L) {
-  lua_Unsigned r = andaux(L);
-  pushunsigned(L, r);
+  b_uint r = andaux(L);
+  lua_pushunsigned(L, r);
   return 1;
 }
 
 
 static int b_test (lua_State *L) {
-  lua_Unsigned r = andaux(L);
+  b_uint r = andaux(L);
   lua_pushboolean(L, r != 0);
   return 1;
 }
@@ -71,32 +58,32 @@ static int b_test (lua_State *L) {
 
 static int b_or (lua_State *L) {
   int i, n = lua_gettop(L);
-  lua_Unsigned r = 0;
+  b_uint r = 0;
   for (i = 1; i <= n; i++)
-    r |= checkunsigned(L, i);
-  pushunsigned(L, trim(r));
+    r |= luaL_checkunsigned(L, i);
+  lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
 static int b_xor (lua_State *L) {
   int i, n = lua_gettop(L);
-  lua_Unsigned r = 0;
+  b_uint r = 0;
   for (i = 1; i <= n; i++)
-    r ^= checkunsigned(L, i);
-  pushunsigned(L, trim(r));
+    r ^= luaL_checkunsigned(L, i);
+  lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
 static int b_not (lua_State *L) {
-  lua_Unsigned r = ~checkunsigned(L, 1);
-  pushunsigned(L, trim(r));
+  b_uint r = ~luaL_checkunsigned(L, 1);
+  lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
-static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
+static int b_shift (lua_State *L, b_uint r, int i) {
   if (i < 0) {  /* shift right? */
     i = -i;
     r = trim(r);
@@ -108,54 +95,54 @@ static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
     else r <<= i;
     r = trim(r);
   }
-  pushunsigned(L, r);
+  lua_pushunsigned(L, r);
   return 1;
 }
 
 
 static int b_lshift (lua_State *L) {
-  return b_shift(L, checkunsigned(L, 1), luaL_checkinteger(L, 2));
+  return b_shift(L, luaL_checkunsigned(L, 1), luaL_checkint(L, 2));
 }
 
 
 static int b_rshift (lua_State *L) {
-  return b_shift(L, checkunsigned(L, 1), -luaL_checkinteger(L, 2));
+  return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkint(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))))
+  b_uint r = luaL_checkunsigned(L, 1);
+  int i = luaL_checkint(L, 2);
+  if (i < 0 || !(r & ((b_uint)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);
+      r = trim((r >> i) | ~(~(b_uint)0 >> i));  /* add signal bit */
+    lua_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 */
+static int b_rot (lua_State *L, int i) {
+  b_uint r = luaL_checkunsigned(L, 1);
+  i &= (LUA_NBITS - 1);  /* i = i % 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));
+  lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
 static int b_lrot (lua_State *L) {
-  return b_rot(L, luaL_checkinteger(L, 2));
+  return b_rot(L, luaL_checkint(L, 2));
 }
 
 
 static int b_rrot (lua_State *L) {
-  return b_rot(L, -luaL_checkinteger(L, 2));
+  return b_rot(L, -luaL_checkint(L, 2));
 }
 
 
@@ -166,35 +153,36 @@ static int b_rrot (lua_State *L) {
 ** '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);
+  int f = luaL_checkint(L, farg);
+  int w = luaL_optint(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;
+  *width = w;
+  return f;
 }
 
 
 static int b_extract (lua_State *L) {
   int w;
-  lua_Unsigned r = trim(checkunsigned(L, 1));
+  b_uint r = luaL_checkunsigned(L, 1);
   int f = fieldargs(L, 2, &w);
   r = (r >> f) & mask(w);
-  pushunsigned(L, r);
+  lua_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));
+  b_uint r = luaL_checkunsigned(L, 1);
+  b_uint v = luaL_checkunsigned(L, 2);
   int f = fieldargs(L, 3, &w);
-  lua_Unsigned m = mask(w);
-  r = (r & ~(m << f)) | ((v & m) << f);
-  pushunsigned(L, r);
+  int m = mask(w);
+  v &= m;  /* erase bits outside given width */
+  r = (r & ~(m << f)) | (v << f);
+  lua_pushunsigned(L, r);
   return 1;
 }
 
@@ -222,12 +210,3 @@ LUAMOD_API int luaopen_bit32 (lua_State *L) {
   return 1;
 }
 
-
-#else					/* }{ */
-
-
-LUAMOD_API int luaopen_bit32 (lua_State *L) {
-  return luaL_error(L, "library 'bit32' has been deprecated");
-}
-
-#endif					/* } */

lcode.c

@@ -1,18 +1,15 @@
 /*
-** $Id: lcode.c,v 2.102 2015/10/26 14:27:47 roberto Exp roberto $
+** $Id: lcode.c,v 2.62 2012/08/16 17:34:28 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
 
+
+#include <stdlib.h>
+
 #define lcode_c
 #define LUA_CORE
 
-#include "lprefix.h"
-
-
-#include <math.h>
-#include <stdlib.h>
-
 #include "lua.h"
 
 #include "lcode.h"
@@ -29,25 +26,11 @@
 #include "lvm.h"
 
 
-/* Maximum number of registers in a Lua function (must fit in 8 bits) */
-#define MAXREGS		255
-
-
 #define hasjumps(e)	((e)->t != (e)->f)
 
 
-static int tonumeral(expdesc *e, TValue *v) {
-  if (hasjumps(e))
-    return 0;  /* not a numeral */
-  switch (e->k) {
-    case VKINT:
-      if (v) setivalue(v, e->u.ival);
-      return 1;
-    case VKFLT:
-      if (v) setfltvalue(v, e->u.nval);
-      return 1;
-    default: return 0;
-  }
+static int isnumeral(expdesc *e) {
+  return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
 }
 
 
@@ -105,7 +88,7 @@ static void fixjump (FuncState *fs, int pc, int dest) {
 
 
 /*
-** returns current 'pc' and marks it as a jump target (to avoid wrong
+** returns current `pc' and marks it as a jump target (to avoid wrong
 ** optimizations with consecutive instructions not in the same basic block).
 */
 int luaK_getlabel (FuncState *fs) {
@@ -193,7 +176,7 @@ void luaK_patchlist (FuncState *fs, int list, int target) {
 }
 
 
-void luaK_patchclose (FuncState *fs, int list, int level) {
+LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level) {
   level++;  /* argument is +1 to reserve 0 as non-op */
   while (list != NO_JUMP) {
     int next = getjump(fs, list);
@@ -228,7 +211,7 @@ void luaK_concat (FuncState *fs, int *l1, int l2) {
 
 static int luaK_code (FuncState *fs, Instruction i) {
   Proto *f = fs->f;
-  dischargejpc(fs);  /* 'pc' will change */
+  dischargejpc(fs);  /* `pc' will change */
   /* put new instruction in code array */
   luaM_growvector(fs->ls->L, f->code, fs->pc, f->sizecode, Instruction,
                   MAX_INT, "opcodes");
@@ -278,9 +261,8 @@ int luaK_codek (FuncState *fs, int reg, int k) {
 void luaK_checkstack (FuncState *fs, int n) {
   int newstack = fs->freereg + n;
   if (newstack > fs->f->maxstacksize) {
-    if (newstack >= MAXREGS)
-      luaX_syntaxerror(fs->ls,
-        "function or expression needs too many registers");
+    if (newstack >= MAXSTACK)
+      luaX_syntaxerror(fs->ls, "function or expression too complex");
     fs->f->maxstacksize = cast_byte(newstack);
   }
 }
@@ -306,28 +288,25 @@ static void freeexp (FuncState *fs, expdesc *e) {
 }
 
 
-/*
-** Use scanner's table to cache position of constants in constant list
-** and try to reuse constants
-*/
 static int addk (FuncState *fs, TValue *key, TValue *v) {
   lua_State *L = fs->ls->L;
+  TValue *idx = luaH_set(L, fs->h, key);
   Proto *f = fs->f;
-  TValue *idx = luaH_set(L, fs->ls->h, key);  /* index scanner table */
   int k, oldsize;
-  if (ttisinteger(idx)) {  /* is there an index there? */
-    k = cast_int(ivalue(idx));
-    /* correct value? (warning: must distinguish floats from integers!) */
-    if (k < fs->nk && ttype(&f->k[k]) == ttype(v) &&
-                      luaV_rawequalobj(&f->k[k], v))
-      return k;  /* reuse index */
+  if (ttisnumber(idx)) {
+    lua_Number n = nvalue(idx);
+    lua_number2int(k, n);
+    if (luaV_rawequalobj(&f->k[k], v))
+      return k;
+    /* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
+       go through and create a new entry for this value */
   }
   /* constant not found; create a new entry */
   oldsize = f->sizek;
   k = fs->nk;
   /* numerical value does not need GC barrier;
      table has no metatable, so it does not need to invalidate cache */
-  setivalue(idx, k);
+  setnvalue(idx, cast_num(k));
   luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants");
   while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
   setobj(L, &f->k[k], v);
@@ -344,23 +323,20 @@ int luaK_stringK (FuncState *fs, TString *s) {
 }
 
 
-/*
-** Integers use userdata as keys to avoid collision with floats with same
-** value; conversion to 'void*' used only for hashing, no "precision"
-** problems
-*/
-int luaK_intK (FuncState *fs, lua_Integer n) {
-  TValue k, o;
-  setpvalue(&k, cast(void*, cast(size_t, n)));
-  setivalue(&o, n);
-  return addk(fs, &k, &o);
-}
-
-
-static int luaK_numberK (FuncState *fs, lua_Number r) {
+int luaK_numberK (FuncState *fs, lua_Number r) {
+  int n;
+  lua_State *L = fs->ls->L;
   TValue o;
-  setfltvalue(&o, r);
-  return addk(fs, &o, &o);
+  setnvalue(&o, r);
+  if (r == 0 || luai_numisnan(NULL, r)) {  /* handle -0 and NaN */
+    /* use raw representation as key to avoid numeric problems */
+    setsvalue(L, L->top++, luaS_newlstr(L, (char *)&r, sizeof(r)));
+    n = addk(fs, L->top - 1, &o);
+    L->top--;
+  }
+  else
+    n = addk(fs, &o, &o);  /* regular case */
+  return n;
 }
 
 
@@ -375,7 +351,7 @@ static int nilK (FuncState *fs) {
   TValue k, v;
   setnilvalue(&v);
   /* cannot use nil as key; instead use table itself to represent nil */
-  sethvalue(fs->ls->L, &k, fs->ls->h);
+  sethvalue(fs->ls->L, &k, fs->h);
   return addk(fs, &k, &v);
 }
 
@@ -457,14 +433,10 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
       luaK_codek(fs, reg, e->u.info);
       break;
     }
-    case VKFLT: {
+    case VKNUM: {
       luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
       break;
     }
-    case VKINT: {
-      luaK_codek(fs, reg, luaK_intK(fs, e->u.ival));
-      break;
-    }
     case VRELOCABLE: {
       Instruction *pc = &getcode(fs, e);
       SETARG_A(*pc, reg);
@@ -496,7 +468,7 @@ static void discharge2anyreg (FuncState *fs, expdesc *e) {
 static void exp2reg (FuncState *fs, expdesc *e, int reg) {
   discharge2reg(fs, e, reg);
   if (e->k == VJMP)
-    luaK_concat(fs, &e->t, e->u.info);  /* put this jump in 't' list */
+    luaK_concat(fs, &e->t, e->u.info);  /* put this jump in `t' list */
   if (hasjumps(e)) {
     int final;  /* position after whole expression */
     int p_f = NO_JUMP;  /* position of an eventual LOAD false */
@@ -566,19 +538,13 @@ int luaK_exp2RK (FuncState *fs, expdesc *e) {
       }
       else break;
     }
-    case VKINT: {
-      e->u.info = luaK_intK(fs, e->u.ival);
-      e->k = VK;
-      goto vk;
-    }
-    case VKFLT: {
+    case VKNUM: {
       e->u.info = luaK_numberK(fs, e->u.nval);
       e->k = VK;
+      /* go through */
     }
-    /* FALLTHROUGH */
     case VK: {
-     vk:
-      if (e->u.info <= MAXINDEXRK)  /* constant fits in 'argC'? */
+      if (e->u.info <= MAXINDEXRK)  /* constant fits in argC? */
         return RKASK(e->u.info);
       else break;
     }
@@ -661,7 +627,7 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
       pc = e->u.info;
       break;
     }
-    case VK: case VKFLT: case VKINT: case VTRUE: {
+    case VK: case VKNUM: case VTRUE: {
       pc = NO_JUMP;  /* always true; do nothing */
       break;
     }
@@ -670,7 +636,7 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
       break;
     }
   }
-  luaK_concat(fs, &e->f, pc);  /* insert last jump in 'f' list */
+  luaK_concat(fs, &e->f, pc);  /* insert last jump in `f' list */
   luaK_patchtohere(fs, e->t);
   e->t = NO_JUMP;
 }
@@ -693,7 +659,7 @@ void luaK_goiffalse (FuncState *fs, expdesc *e) {
       break;
     }
   }
-  luaK_concat(fs, &e->t, pc);  /* insert last jump in 't' list */
+  luaK_concat(fs, &e->t, pc);  /* insert last jump in `t' list */
   luaK_patchtohere(fs, e->f);
   e->f = NO_JUMP;
 }
@@ -706,7 +672,7 @@ static void codenot (FuncState *fs, expdesc *e) {
       e->k = VTRUE;
       break;
     }
-    case VK: case VKFLT: case VKINT: case VTRUE: {
+    case VK: case VKNUM: case VTRUE: {
       e->k = VFALSE;
       break;
     }
@@ -744,70 +710,25 @@ void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
 }
 
 
-/*
-** return false if folding can raise an error
-*/
-static int validop (int op, TValue *v1, TValue *v2) {
-  switch (op) {
-    case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
-    case LUA_OPSHL: case LUA_OPSHR: case LUA_OPBNOT: {  /* conversion errors */
-      lua_Integer i;
-      return (tointeger(v1, &i) && tointeger(v2, &i));
-    }
-    case LUA_OPDIV: case LUA_OPIDIV: case LUA_OPMOD:  /* division by 0 */
-      return (nvalue(v2) != 0);
-    default: return 1;  /* everything else is valid */
-  }
-}
-
-
-/*
-** Try to "constant-fold" an operation; return 1 iff successful
-*/
-static int constfolding (FuncState *fs, int op, expdesc *e1, expdesc *e2) {
-  TValue v1, v2, res;
-  if (!tonumeral(e1, &v1) || !tonumeral(e2, &v2) || !validop(op, &v1, &v2))
-    return 0;  /* non-numeric operands or not safe to fold */
-  luaO_arith(fs->ls->L, op, &v1, &v2, &res);  /* does operation */
-  if (ttisinteger(&res)) {
-    e1->k = VKINT;
-    e1->u.ival = ivalue(&res);
-  }
-  else {  /* folds neither NaN nor 0.0 (to avoid collapsing with -0.0) */
-    lua_Number n = fltvalue(&res);
-    if (luai_numisnan(n) || n == 0)
-      return 0;
-    e1->k = VKFLT;
-    e1->u.nval = n;
-  }
+static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
+  lua_Number r;
+  if (!isnumeral(e1) || !isnumeral(e2)) return 0;
+  if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)
+    return 0;  /* do not attempt to divide by 0 */
+  r = luaO_arith(op - OP_ADD + LUA_OPADD, e1->u.nval, e2->u.nval);
+  e1->u.nval = r;
   return 1;
 }
 
 
-/*
-** Code for binary and unary expressions that "produce values"
-** (arithmetic operations, bitwise operations, concat, length). First
-** try to do constant folding (only for numeric [arithmetic and
-** bitwise] operations, which is what 'lua_arith' accepts).
-** Expression to produce final result will be encoded in 'e1'.
-*/
-static void codeexpval (FuncState *fs, OpCode op,
-                        expdesc *e1, expdesc *e2, int line) {
-  lua_assert(op >= OP_ADD);
-  if (op <= OP_BNOT && constfolding(fs, (op - OP_ADD) + LUA_OPADD, e1, e2))
-    return;  /* result has been folded */
+static void codearith (FuncState *fs, OpCode op,
+                       expdesc *e1, expdesc *e2, int line) {
+  if (constfolding(op, e1, e2))
+    return;
   else {
-    int o1, o2;
-    /* move operands to registers (if needed) */
-    if (op == OP_UNM || op == OP_BNOT || op == OP_LEN) {  /* unary op? */
-      o2 = 0;  /* no second expression */
-      o1 = luaK_exp2anyreg(fs, e1);  /* cannot operate on constants */
-    }
-    else {  /* regular case (binary operators) */
-      o2 = luaK_exp2RK(fs, e2);  /* both operands are "RK" */
-      o1 = luaK_exp2RK(fs, e1);
-    }
-    if (o1 > o2) {  /* free registers in proper order */
+    int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0;
+    int o1 = luaK_exp2RK(fs, e1);
+    if (o1 > o2) {
       freeexp(fs, e1);
       freeexp(fs, e2);
     }
@@ -815,8 +736,8 @@ static void codeexpval (FuncState *fs, OpCode op,
       freeexp(fs, e2);
       freeexp(fs, e1);
     }
-    e1->u.info = luaK_codeABC(fs, op, 0, o1, o2);  /* generate opcode */
-    e1->k = VRELOCABLE;  /* all those operations are relocatable */
+    e1->u.info = luaK_codeABC(fs, op, 0, o1, o2);
+    e1->k = VRELOCABLE;
     luaK_fixline(fs, line);
   }
 }
@@ -829,7 +750,7 @@ static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
   freeexp(fs, e2);
   freeexp(fs, e1);
   if (cond == 0 && op != OP_EQ) {
-    int temp;  /* exchange args to replace by '<' or '<=' */
+    int temp;  /* exchange args to replace by `<' or `<=' */
     temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */
     cond = 1;
   }
@@ -840,13 +761,23 @@ static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
 
 void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line) {
   expdesc e2;
-  e2.t = e2.f = NO_JUMP; e2.k = VKINT; e2.u.ival = 0;
+  e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
   switch (op) {
-    case OPR_MINUS: case OPR_BNOT: case OPR_LEN: {
-      codeexpval(fs, cast(OpCode, (op - OPR_MINUS) + OP_UNM), e, &e2, line);
+    case OPR_MINUS: {
+      if (isnumeral(e))  /* minus constant? */
+        e->u.nval = luai_numunm(NULL, e->u.nval);  /* fold it */
+      else {
+        luaK_exp2anyreg(fs, e);
+        codearith(fs, OP_UNM, e, &e2, line);
+      }
       break;
     }
     case OPR_NOT: codenot(fs, e); break;
+    case OPR_LEN: {
+      luaK_exp2anyreg(fs, e);  /* cannot operate on constants */
+      codearith(fs, OP_LEN, e, &e2, line);
+      break;
+    }
     default: lua_assert(0);
   }
 }
@@ -863,15 +794,12 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
       break;
     }
     case OPR_CONCAT: {
-      luaK_exp2nextreg(fs, v);  /* operand must be on the 'stack' */
+      luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */
       break;
     }
-    case OPR_ADD: case OPR_SUB:
-    case OPR_MUL: case OPR_DIV: case OPR_IDIV:
-    case OPR_MOD: case OPR_POW:
-    case OPR_BAND: case OPR_BOR: case OPR_BXOR:
-    case OPR_SHL: case OPR_SHR: {
-      if (!tonumeral(v, NULL)) luaK_exp2RK(fs, v);
+    case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
+    case OPR_MOD: case OPR_POW: {
+      if (!isnumeral(v)) luaK_exp2RK(fs, v);
       break;
     }
     default: {
@@ -909,23 +837,21 @@ void luaK_posfix (FuncState *fs, BinOpr op,
       }
       else {
         luaK_exp2nextreg(fs, e2);  /* operand must be on the 'stack' */
-        codeexpval(fs, OP_CONCAT, e1, e2, line);
+        codearith(fs, OP_CONCAT, e1, e2, line);
       }
       break;
     }
     case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
-    case OPR_IDIV: case OPR_MOD: case OPR_POW:
-    case OPR_BAND: case OPR_BOR: case OPR_BXOR:
-    case OPR_SHL: case OPR_SHR: {
-      codeexpval(fs, cast(OpCode, (op - OPR_ADD) + OP_ADD), e1, e2, line);
+    case OPR_MOD: case OPR_POW: {
+      codearith(fs, cast(OpCode, op - OPR_ADD + OP_ADD), e1, e2, line);
       break;
     }
     case OPR_EQ: case OPR_LT: case OPR_LE: {
-      codecomp(fs, cast(OpCode, (op - OPR_EQ) + OP_EQ), 1, e1, e2);
+      codecomp(fs, cast(OpCode, op - OPR_EQ + OP_EQ), 1, e1, e2);
       break;
     }
     case OPR_NE: case OPR_GT: case OPR_GE: {
-      codecomp(fs, cast(OpCode, (op - OPR_NE) + OP_EQ), 0, e1, e2);
+      codecomp(fs, cast(OpCode, op - OPR_NE + OP_EQ), 0, e1, e2);
       break;
     }
     default: lua_assert(0);

lcode.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h,v 1.62 2013/12/18 14:12:03 roberto Exp roberto $
+** $Id: lcode.h,v 1.58 2011/08/30 16:26:41 roberto Exp $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -24,11 +24,7 @@
 ** grep "ORDER OPR" if you change these enums  (ORDER OP)
 */
 typedef enum BinOpr {
-  OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
-  OPR_DIV,
-  OPR_IDIV,
-  OPR_BAND, OPR_BOR, OPR_BXOR,
-  OPR_SHL, OPR_SHR,
+  OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW,
   OPR_CONCAT,
   OPR_EQ, OPR_LT, OPR_LE,
   OPR_NE, OPR_GT, OPR_GE,
@@ -37,7 +33,7 @@ typedef enum BinOpr {
 } BinOpr;
 
 
-typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
+typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
 
 
 #define getcode(fs,e)	((fs)->f->code[(e)->u.info])
@@ -56,7 +52,7 @@ 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 int luaK_stringK (FuncState *fs, TString *s);
-LUAI_FUNC int luaK_intK (FuncState *fs, lua_Integer n);
+LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r);
 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);

lcorolib.c

@@ -1,30 +1,22 @@
 /*
-** $Id: lcorolib.c,v 1.8 2014/10/25 11:50:46 roberto Exp roberto $
+** $Id: lcorolib.c,v 1.5 2013/02/21 13:44:53 roberto Exp $
 ** Coroutine Library
 ** See Copyright Notice in lua.h
 */
 
-#define lcorolib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <stdlib.h>
 
+
+#define lcorolib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
 #include "lualib.h"
 
 
-static lua_State *getco (lua_State *L) {
-  lua_State *co = lua_tothread(L, 1);
-  luaL_argcheck(L, co, 1, "thread expected");
-  return co;
-}
-
-
 static int auxresume (lua_State *L, lua_State *co, int narg) {
   int status;
   if (!lua_checkstack(co, narg)) {
@@ -55,8 +47,9 @@ static int auxresume (lua_State *L, lua_State *co, int narg) {
 
 
 static int luaB_coresume (lua_State *L) {
-  lua_State *co = getco(L);
+  lua_State *co = lua_tothread(L, 1);
   int r;
+  luaL_argcheck(L, co, 1, "coroutine expected");
   r = auxresume(L, co, lua_gettop(L) - 1);
   if (r < 0) {
     lua_pushboolean(L, 0);
@@ -66,7 +59,7 @@ static int luaB_coresume (lua_State *L) {
   else {
     lua_pushboolean(L, 1);
     lua_insert(L, -(r + 1));
-    return r + 1;  /* return true + 'resume' returns */
+    return r + 1;  /* return true + `resume' returns */
   }
 }
 
@@ -109,7 +102,8 @@ static int luaB_yield (lua_State *L) {
 
 
 static int luaB_costatus (lua_State *L) {
-  lua_State *co = getco(L);
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argcheck(L, co, 1, "coroutine expected");
   if (L == co) lua_pushliteral(L, "running");
   else {
     switch (lua_status(co)) {
@@ -135,12 +129,6 @@ static int luaB_costatus (lua_State *L) {
 }
 
 
-static int luaB_yieldable (lua_State *L) {
-  lua_pushboolean(L, lua_isyieldable(L));
-  return 1;
-}
-
-
 static int luaB_corunning (lua_State *L) {
   int ismain = lua_pushthread(L);
   lua_pushboolean(L, ismain);
@@ -155,7 +143,6 @@ static const luaL_Reg co_funcs[] = {
   {"status", luaB_costatus},
   {"wrap", luaB_cowrap},
   {"yield", luaB_yield},
-  {"isyieldable", luaB_yieldable},
   {NULL, NULL}
 };
 

lctype.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lctype.c,v 1.11 2011/10/03 16:19:23 roberto Exp roberto $
+** $Id: lctype.c,v 1.11 2011/10/03 16:19:23 roberto Exp $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */
@@ -7,9 +7,6 @@
 #define lctype_c
 #define LUA_CORE
 
-#include "lprefix.h"
-
-
 #include "lctype.h"
 
 #if !LUA_USE_CTYPE	/* { */

lctype.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lctype.h,v 1.11 2011/06/27 18:22:46 roberto Exp roberto $
+** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */

ldblib.c

@@ -1,37 +1,26 @@
 /*
-** $Id: ldblib.c,v 1.150 2015/11/19 19:16:22 roberto Exp roberto $
+** $Id: ldblib.c,v 1.132.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
 
-#define ldblib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define ldblib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
 #include "lualib.h"
 
 
-/*
-** The hook table at registry[&HOOKKEY] maps threads to their current
-** hook function. (We only need the unique address of 'HOOKKEY'.)
-*/
-static const int HOOKKEY = 0;
+#define HOOKKEY		"_HKEY"
 
 
-/*
-** If L1 != L, L1 can be in any state, and therefore there are no
-** guarantees about its stack space; any push in L1 must be
-** checked.
-*/
 static void checkstack (lua_State *L, lua_State *L1, int n) {
   if (L != L1 && !lua_checkstack(L1, n))
     luaL_error(L, "stack overflow");
@@ -73,20 +62,35 @@ static int db_getuservalue (lua_State *L) {
 
 
 static int db_setuservalue (lua_State *L) {
+  if (lua_type(L, 1) == LUA_TLIGHTUSERDATA)
+    luaL_argerror(L, 1, "full userdata expected, got light userdata");
   luaL_checktype(L, 1, LUA_TUSERDATA);
-  luaL_checkany(L, 2);
+  if (!lua_isnoneornil(L, 2))
+    luaL_checktype(L, 2, LUA_TTABLE);
   lua_settop(L, 2);
   lua_setuservalue(L, 1);
   return 1;
 }
 
 
-/*
-** Auxiliary function used by several library functions: check for
-** an optional thread as function's first argument and set 'arg' with
-** 1 if this argument is present (so that functions can skip it to
-** access their other arguments)
-*/
+static void settabss (lua_State *L, const char *i, const char *v) {
+  lua_pushstring(L, v);
+  lua_setfield(L, -2, i);
+}
+
+
+static void settabsi (lua_State *L, const char *i, int v) {
+  lua_pushinteger(L, v);
+  lua_setfield(L, -2, i);
+}
+
+
+static void settabsb (lua_State *L, const char *i, int v) {
+  lua_pushboolean(L, v);
+  lua_setfield(L, -2, i);
+}
+
+
 static lua_State *getthread (lua_State *L, int *arg) {
   if (lua_isthread(L, 1)) {
     *arg = 1;
@@ -94,74 +98,45 @@ static lua_State *getthread (lua_State *L, int *arg) {
   }
   else {
     *arg = 0;
-    return L;  /* function will operate over current thread */
+    return L;
   }
 }
 
 
-/*
-** Variations of 'lua_settable', used by 'db_getinfo' to put results
-** from 'lua_getinfo' into result table. Key is always a string;
-** value can be a string, an int, or a boolean.
-*/
-static void settabss (lua_State *L, const char *k, const char *v) {
-  lua_pushstring(L, v);
-  lua_setfield(L, -2, k);
-}
-
-static void settabsi (lua_State *L, const char *k, int v) {
-  lua_pushinteger(L, v);
-  lua_setfield(L, -2, k);
-}
-
-static void settabsb (lua_State *L, const char *k, int v) {
-  lua_pushboolean(L, v);
-  lua_setfield(L, -2, k);
-}
-
-
-/*
-** In function 'db_getinfo', the call to 'lua_getinfo' may push
-** results on the stack; later it creates the result table to put
-** these objects. Function 'treatstackoption' puts the result from
-** 'lua_getinfo' on top of the result table so that it can call
-** 'lua_setfield'.
-*/
 static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
-  if (L == L1)
-    lua_rotate(L, -2, 1);  /* exchange object and table */
+  if (L == L1) {
+    lua_pushvalue(L, -2);
+    lua_remove(L, -3);
+  }
   else
-    lua_xmove(L1, L, 1);  /* move object to the "main" stack */
-  lua_setfield(L, -2, fname);  /* put object into table */
+    lua_xmove(L1, L, 1);
+  lua_setfield(L, -2, fname);
 }
 
 
-/*
-** Calls 'lua_getinfo' and collects all results in a new table.
-** L1 needs stack space for an optional input (function) plus
-** two optional outputs (function and line table) from function
-** 'lua_getinfo'.
-*/
 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, "flnStu");
   checkstack(L, L1, 3);
-  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 */
-    lua_xmove(L, L1, 1);
-  }
-  else {  /* stack level */
-    if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
+  if (lua_isnumber(L, arg+1)) {
+    if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {
       lua_pushnil(L);  /* level out of range */
       return 1;
     }
   }
+  else if (lua_isfunction(L, arg+1)) {
+    lua_pushfstring(L, ">%s", options);
+    options = lua_tostring(L, -1);
+    lua_pushvalue(L, arg+1);
+    lua_xmove(L, L1, 1);
+  }
+  else
+    return luaL_argerror(L, arg+1, "function or level expected");
   if (!lua_getinfo(L1, options, &ar))
     return luaL_argerror(L, arg+2, "invalid option");
-  lua_newtable(L);  /* table to collect results */
+  lua_createtable(L, 0, 2);
   if (strchr(options, 'S')) {
     settabss(L, "source", ar.source);
     settabss(L, "short_src", ar.short_src);
@@ -195,22 +170,21 @@ static int db_getlocal (lua_State *L) {
   lua_State *L1 = getthread(L, &arg);
   lua_Debug ar;
   const char *name;
-  int nvar = (int)luaL_checkinteger(L, arg + 2);  /* local-variable index */
+  int nvar = luaL_checkint(L, arg+2);  /* local-variable index */
   if (lua_isfunction(L, arg + 1)) {  /* function argument? */
     lua_pushvalue(L, arg + 1);  /* push function */
     lua_pushstring(L, lua_getlocal(L, NULL, nvar));  /* push local name */
-    return 1;  /* return only name (there is no value) */
+    return 1;
   }
   else {  /* stack-level argument */
-    int level = (int)luaL_checkinteger(L, arg + 1);
-    if (!lua_getstack(L1, level, &ar))  /* out of range? */
+    if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar))  /* out of range? */
       return luaL_argerror(L, arg+1, "level out of range");
     checkstack(L, L1, 1);
     name = lua_getlocal(L1, &ar, nvar);
     if (name) {
-      lua_xmove(L1, L, 1);  /* move local value */
+      lua_xmove(L1, L, 1);  /* push local value */
       lua_pushstring(L, name);  /* push name */
-      lua_rotate(L, -2, 1);  /* re-order */
+      lua_pushvalue(L, -2);  /* re-order */
       return 2;
     }
     else {
@@ -223,36 +197,27 @@ static int db_getlocal (lua_State *L) {
 
 static int db_setlocal (lua_State *L) {
   int arg;
-  const char *name;
   lua_State *L1 = getthread(L, &arg);
   lua_Debug ar;
-  int level = (int)luaL_checkinteger(L, arg + 1);
-  int nvar = (int)luaL_checkinteger(L, arg + 2);
-  if (!lua_getstack(L1, level, &ar))  /* out of range? */
+  if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar))  /* out of range? */
     return luaL_argerror(L, arg+1, "level out of range");
   luaL_checkany(L, arg+3);
   lua_settop(L, arg+3);
   checkstack(L, L1, 1);
   lua_xmove(L, L1, 1);
-  name = lua_setlocal(L1, &ar, nvar);
-  if (name == NULL)
-    lua_pop(L1, 1);  /* pop value (if not popped by 'lua_setlocal') */
-  lua_pushstring(L, name);
+  lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2)));
   return 1;
 }
 
 
-/*
-** get (if 'get' is true) or set an upvalue from a closure
-*/
 static int auxupvalue (lua_State *L, int get) {
   const char *name;
-  int n = (int)luaL_checkinteger(L, 2);  /* upvalue index */
-  luaL_checktype(L, 1, LUA_TFUNCTION);  /* closure */
+  int n = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TFUNCTION);
   name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
   if (name == NULL) return 0;
   lua_pushstring(L, name);
-  lua_insert(L, -(get+1));  /* no-op if get is false */
+  lua_insert(L, -(get+1));
   return get + 1;
 }
 
@@ -268,15 +233,13 @@ static int db_setupvalue (lua_State *L) {
 }
 
 
-/*
-** Check whether a given upvalue from a given closure exists and
-** returns its index
-*/
 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 */
-  luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup,
-                   "invalid upvalue index");
+  lua_Debug ar;
+  int nup = luaL_checkint(L, argnup);
+  luaL_checktype(L, argf, LUA_TFUNCTION);
+  lua_pushvalue(L, argf);
+  lua_getinfo(L, ">u", &ar);
+  luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index");
   return nup;
 }
 
@@ -298,29 +261,26 @@ static int db_upvaluejoin (lua_State *L) {
 }
 
 
-/*
-** Call hook function registered at hook table for the current
-** thread (if there is one)
-*/
+#define gethooktable(L)	luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)
+
+
 static void hookf (lua_State *L, lua_Debug *ar) {
   static const char *const hooknames[] =
     {"call", "return", "line", "count", "tail call"};
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
+  gethooktable(L);
   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 */
+  lua_rawget(L, -2);
+  if (lua_isfunction(L, -1)) {
+    lua_pushstring(L, hooknames[(int)ar->event]);
     if (ar->currentline >= 0)
-      lua_pushinteger(L, ar->currentline);  /* push current line */
+      lua_pushinteger(L, ar->currentline);
     else lua_pushnil(L);
     lua_assert(lua_getinfo(L, "lS", ar));
-    lua_call(L, 2, 0);  /* call hook function */
+    lua_call(L, 2, 0);
   }
 }
 
 
-/*
-** Convert a string mask (for 'sethook') into a bit mask
-*/
 static int makemask (const char *smask, int count) {
   int mask = 0;
   if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
@@ -331,9 +291,6 @@ static int makemask (const char *smask, int count) {
 }
 
 
-/*
-** Convert a bit mask (for 'gethook') into a string mask
-*/
 static char *unmakemask (int mask, char *smask) {
   int i = 0;
   if (mask & LUA_MASKCALL) smask[i++] = 'c';
@@ -348,30 +305,27 @@ static int db_sethook (lua_State *L) {
   int arg, mask, count;
   lua_Hook func;
   lua_State *L1 = getthread(L, &arg);
-  if (lua_isnoneornil(L, arg+1)) {  /* no hook? */
+  if (lua_isnoneornil(L, arg+1)) {
     lua_settop(L, arg+1);
     func = NULL; mask = 0; count = 0;  /* turn off hooks */
   }
   else {
     const char *smask = luaL_checkstring(L, arg+2);
     luaL_checktype(L, arg+1, LUA_TFUNCTION);
-    count = (int)luaL_optinteger(L, arg + 3, 0);
+    count = luaL_optint(L, arg+3, 0);
     func = hookf; mask = makemask(smask, count);
   }
-  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 */
+  if (gethooktable(L) == 0) {  /* creating hook table? */
     lua_pushstring(L, "k");
     lua_setfield(L, -2, "__mode");  /** hooktable.__mode = "k" */
     lua_pushvalue(L, -1);
     lua_setmetatable(L, -2);  /* setmetatable(hooktable) = hooktable */
   }
   checkstack(L, L1, 1);
-  lua_pushthread(L1); lua_xmove(L1, L, 1);  /* key (thread) */
-  lua_pushvalue(L, arg + 1);  /* value (hook function) */
-  lua_rawset(L, -3);  /* hooktable[L1] = new Lua hook */
-  lua_sethook(L1, func, mask, count);
+  lua_pushthread(L1); lua_xmove(L1, L, 1);
+  lua_pushvalue(L, arg+1);
+  lua_rawset(L, -3);  /* set new hook */
+  lua_sethook(L1, func, mask, count);  /* set hooks */
   return 0;
 }
 
@@ -382,19 +336,17 @@ 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? */
-    lua_pushnil(L);
-  else if (hook != hookf)  /* external hook? */
+  if (hook != NULL && hook != hookf)  /* external hook? */
     lua_pushliteral(L, "external hook");
-  else {  /* hook table must exist */
-    lua_rawgetp(L, LUA_REGISTRYINDEX, &HOOKKEY);
+  else {
+    gethooktable(L);
     checkstack(L, L1, 1);
     lua_pushthread(L1); lua_xmove(L1, L, 1);
-    lua_rawget(L, -2);   /* 1st result = hooktable[L1] */
+    lua_rawget(L, -2);   /* get hook */
     lua_remove(L, -2);  /* remove hook table */
   }
-  lua_pushstring(L, unmakemask(mask, buff));  /* 2nd result = mask */
-  lua_pushinteger(L, lua_gethookcount(L1));  /* 3rd result = count */
+  lua_pushstring(L, unmakemask(mask, buff));
+  lua_pushinteger(L, lua_gethookcount(L1));
   return 3;
 }
 
@@ -402,13 +354,13 @@ static int db_gethook (lua_State *L) {
 static int db_debug (lua_State *L) {
   for (;;) {
     char buffer[250];
-    lua_writestringerror("%s", "lua_debug> ");
+    luai_writestringerror("%s", "lua_debug> ");
     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", lua_tostring(L, -1));
+      luai_writestringerror("%s\n", lua_tostring(L, -1));
     lua_settop(L, 0);  /* remove eventual returns */
   }
 }
@@ -421,7 +373,7 @@ static int db_traceback (lua_State *L) {
   if (msg == NULL && !lua_isnoneornil(L, arg + 1))  /* non-string 'msg'? */
     lua_pushvalue(L, arg + 1);  /* return it untouched */
   else {
-    int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
+    int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0);
     luaL_traceback(L, L1, msg, level);
   }
   return 1;

ldebug.c

@@ -1,19 +1,18 @@
 /*
-** $Id: ldebug.c,v 2.116 2015/10/22 14:40:47 roberto Exp roberto $
+** $Id: ldebug.c,v 2.90.1.3 2013/05/16 16:04:15 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
 
-#define ldebug_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <stdarg.h>
 #include <stddef.h>
 #include <string.h>
 
+
+#define ldebug_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lapi.h"
@@ -34,10 +33,6 @@
 #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 *getfuncname (lua_State *L, CallInfo *ci, const char **name);
 
 
@@ -52,12 +47,6 @@ static int currentline (CallInfo *ci) {
 }
 
 
-/*
-** 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 void swapextra (lua_State *L) {
   if (L->status == LUA_YIELD) {
     CallInfo *ci = L->ci;  /* get function that yielded */
@@ -71,7 +60,7 @@ static void swapextra (lua_State *L) {
 /*
 ** this function can be called asynchronous (e.g. during a signal)
 */
-LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
+LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
   if (func == NULL || mask == 0) {  /* turn off hooks? */
     mask = 0;
     func = NULL;
@@ -82,6 +71,7 @@ LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
   L->basehookcount = count;
   resethookcount(L);
   L->hookmask = cast_byte(mask);
+  return 1;
 }
 
 
@@ -126,7 +116,7 @@ static const char *upvalname (Proto *p, int uv) {
 
 static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
   int nparams = clLvalue(ci->func)->p->numparams;
-  if (n >= cast_int(ci->u.l.base - ci->func) - nparams)
+  if (n >= ci->u.l.base - ci->func - nparams)
     return NULL;  /* no such vararg */
   else {
     *pos = ci->func + nparams + n;
@@ -172,7 +162,7 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
       name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
   }
   else {  /* active function; get information through 'ar' */
-    StkId pos = NULL;  /* to avoid warnings */
+    StkId pos = 0;  /* to avoid warnings */
     name = findlocal(L, ar->i_ci, n, &pos);
     if (name) {
       setobj2s(L, L->top, pos);
@@ -186,15 +176,14 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
 
 
 LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
-  StkId pos = NULL;  /* to avoid warnings */
+  StkId pos = 0;  /* to avoid warnings */
   const char *name;
   lua_lock(L);
   swapextra(L);
   name = findlocal(L, ar->i_ci, n, &pos);
-  if (name) {
+  if (name)
     setobjs2s(L, pos, L->top - 1);
-    L->top--;  /* pop value */
-  }
+  L->top--;  /* pop value */
   swapextra(L);
   lua_unlock(L);
   return name;
@@ -314,7 +303,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
     setobjs2s(L, L->top, func);
     api_incr_top(L);
   }
-  swapextra(L);  /* correct before option 'L', which can raise a mem. error */
+  swapextra(L);
   if (strchr(what, 'L'))
     collectvalidlines(L, cl);
   lua_unlock(L);
@@ -394,13 +383,18 @@ static int findsetreg (Proto *p, int lastpc, int reg) {
       case OP_JMP: {
         int b = GETARG_sBx(i);
         int dest = pc + 1 + b;
-        /* jump is forward and do not skip 'lastpc'? */
+        /* jump is forward and do not skip `lastpc'? */
         if (pc < dest && dest <= lastpc) {
           if (dest > jmptarget)
             jmptarget = dest;  /* update 'jmptarget' */
         }
         break;
       }
+      case OP_TEST: {
+        if (reg == a)  /* jumped code can change 'a' */
+          setreg = filterpc(pc, jmptarget);
+        break;
+      }
       default:
         if (testAMode(op) && reg == a)  /* any instruction that set A */
           setreg = filterpc(pc, jmptarget);
@@ -466,14 +460,10 @@ static const char *getobjname (Proto *p, int lastpc, int reg,
 
 
 static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
-  TMS tm = (TMS)0;  /* to avoid warnings */
+  TMS tm;
   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? */
-    *name = "?";
-    return "hook";
-  }
   switch (GET_OPCODE(i)) {
     case OP_CALL:
     case OP_TAILCALL:  /* get function name */
@@ -483,27 +473,25 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
        return "for iterator";
     }
     /* all other instructions can call only through metamethods */
-    case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
-      tm = TM_INDEX;
-      break;
-    case OP_SETTABUP: case OP_SETTABLE:
-      tm = TM_NEWINDEX;
-      break;
-    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;
-    case OP_BNOT: tm = TM_BNOT; break;
-    case OP_LEN: tm = TM_LEN; break;
-    case OP_CONCAT: tm = TM_CONCAT; break;
+    case OP_SELF:
+    case OP_GETTABUP:
+    case OP_GETTABLE: tm = TM_INDEX; break;
+    case OP_SETTABUP:
+    case OP_SETTABLE: tm = TM_NEWINDEX; break;
     case OP_EQ: tm = TM_EQ; break;
+    case OP_ADD: tm = TM_ADD; break;
+    case OP_SUB: tm = TM_SUB; break;
+    case OP_MUL: tm = TM_MUL; break;
+    case OP_DIV: tm = TM_DIV; break;
+    case OP_MOD: tm = TM_MOD; break;
+    case OP_POW: tm = TM_POW; break;
+    case OP_UNM: tm = TM_UNM; break;
+    case OP_LEN: tm = TM_LEN; break;
     case OP_LT: tm = TM_LT; break;
     case OP_LE: tm = TM_LE; break;
-    default: lua_assert(0);  /* other instructions cannot call a function */
+    case OP_CONCAT: tm = TM_CONCAT; break;
+    default:
+      return NULL;  /* else no useful name can be found */
   }
   *name = getstr(G(L)->tmname[tm]);
   return "metamethod";
@@ -514,21 +502,17 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
 
 
 /*
-** 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.
+** only ANSI way to check whether a pointer points to an array
+** (used only for error messages, so efficiency is not a big concern)
 */
 static int isinstack (CallInfo *ci, const TValue *o) {
-  ptrdiff_t i = o - ci->u.l.base;
-  return (0 <= i && i < (ci->top - ci->u.l.base) && ci->u.l.base + i == o);
+  StkId p;
+  for (p = ci->u.l.base; p < ci->top; p++)
+    if (o == p) return 1;
+  return 0;
 }
 
 
-/*
-** Checks whether value 'o' came from an upvalue. (That can only happen
-** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on
-** upvalues.)
-*/
 static const char *getupvalname (CallInfo *ci, const TValue *o,
                                  const char **name) {
   LClosure *c = ci_func(ci);
@@ -543,9 +527,10 @@ static const char *getupvalname (CallInfo *ci, const TValue *o,
 }
 
 
-static const char *varinfo (lua_State *L, const TValue *o) {
-  const char *name = NULL;  /* to avoid warnings */
+l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
   CallInfo *ci = L->ci;
+  const char *name = NULL;
+  const char *t = objtypename(o);
   const char *kind = NULL;
   if (isLua(ci)) {
     kind = getupvalname(ci, o, &name);  /* check whether 'o' is an upvalue */
@@ -553,39 +538,26 @@ static const char *varinfo (lua_State *L, const TValue *o) {
       kind = getobjname(ci_func(ci)->p, currentpc(ci),
                         cast_int(o - ci->u.l.base), &name);
   }
-  return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
+  if (kind)
+    luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
+                op, kind, name, t);
+  else
+    luaG_runerror(L, "attempt to %s a %s value", op, t);
 }
 
 
-l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
-  const char *t = objtypename(o);
-  luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
-}
-
-
-l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
-  if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
+l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+  if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
+  lua_assert(!ttisstring(p1) && !ttisnumber(p1));
   luaG_typeerror(L, p1, "concatenate");
 }
 
 
-l_noret luaG_opinterror (lua_State *L, const TValue *p1,
-                         const TValue *p2, const char *msg) {
-  lua_Number temp;
-  if (!tonumber(p1, &temp))  /* first operand is wrong? */
-    p2 = p1;  /* now second is wrong */
-  luaG_typeerror(L, p2, msg);
-}
-
-
-/*
-** Error when both values are convertible to numbers, but not to integers
-*/
-l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
-  lua_Integer temp;
-  if (!tointeger(p1, &temp))
-    p2 = p1;
-  luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
+l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
+  TValue temp;
+  if (luaV_tonumber(p1, &temp) == NULL)
+    p2 = p1;  /* first operand is wrong */
+  luaG_typeerror(L, p2, "perform arithmetic on");
 }
 
 
@@ -599,75 +571,40 @@ l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
 }
 
 
-/* add src:line information to 'msg' */
-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), LUA_IDSIZE);
-  else {  /* no source available; use "?" instead */
-    buff[0] = '?'; buff[1] = '\0';
+static void addinfo (lua_State *L, const char *msg) {
+  CallInfo *ci = L->ci;
+  if (isLua(ci)) {  /* is Lua code? */
+    char buff[LUA_IDSIZE];  /* add file:line information */
+    int line = currentline(ci);
+    TString *src = ci_func(ci)->p->source;
+    if (src)
+      luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
+    else {  /* no source available; use "?" instead */
+      buff[0] = '?'; buff[1] = '\0';
+    }
+    luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
   }
-  return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
 }
 
 
 l_noret luaG_errormsg (lua_State *L) {
   if (L->errfunc != 0) {  /* is there an error handling function? */
     StkId errfunc = restorestack(L, L->errfunc);
+    if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
     setobjs2s(L, L->top, L->top - 1);  /* move argument */
     setobjs2s(L, L->top - 1, errfunc);  /* push function */
-    L->top++;  /* assume EXTRA_STACK */
-    luaD_callnoyield(L, L->top - 2, 1);  /* call it */
+    L->top++;
+    luaD_call(L, L->top - 2, 1, 0);  /* call it */
   }
   luaD_throw(L, LUA_ERRRUN);
 }
 
 
 l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
-  CallInfo *ci = L->ci;
-  const char *msg;
   va_list argp;
   va_start(argp, fmt);
-  msg = luaO_pushvfstring(L, fmt, argp);  /* format message */
+  addinfo(L, luaO_pushvfstring(L, fmt, argp));
   va_end(argp);
-  if (isLua(ci))  /* if Lua function, add source:line information */
-    luaG_addinfo(L, msg, ci_func(ci)->p->source, currentline(ci));
   luaG_errormsg(L);
 }
 
-
-void luaG_traceexec (lua_State *L) {
-  CallInfo *ci = L->ci;
-  lu_byte mask = L->hookmask;
-  int counthook = (--L->hookcount == 0 && (mask & LUA_MASKCOUNT));
-  if (counthook)
-    resethookcount(L);  /* reset count */
-  else if (!(mask & LUA_MASKLINE))
-    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;  /* do not call hook again (VM yielded, so it did not move) */
-  }
-  if (counthook)
-    luaD_hook(L, LUA_HOOKCOUNT, -1);  /* call count hook */
-  if (mask & LUA_MASKLINE) {
-    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);
-  }
-}
-

ldebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.h,v 2.13 2015/03/11 16:10:41 roberto Exp roberto $
+** $Id: ldebug.h,v 2.7 2011/10/07 20:45:19 roberto Exp $
 ** Auxiliary functions from Debug Interface module
 ** See Copyright Notice in lua.h
 */
@@ -13,27 +13,22 @@
 
 #define pcRel(pc, p)	(cast(int, (pc) - (p)->code) - 1)
 
-#define getfuncline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : -1)
+#define getfuncline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
 
 #define resethookcount(L)	(L->hookcount = L->basehookcount)
 
+/* Active Lua function (given call info) */
+#define ci_func(ci)		(clLvalue((ci)->func))
+
 
 LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
                                                 const char *opname);
-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,
-                                                 const TValue *p2,
-                                                 const char *msg);
-LUAI_FUNC l_noret luaG_tointerror (lua_State *L, const TValue *p1,
+LUAI_FUNC l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2);
+LUAI_FUNC l_noret luaG_aritherror (lua_State *L, const TValue *p1,
                                                  const TValue *p2);
 LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1,
                                                  const TValue *p2);
 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 void luaG_traceexec (lua_State *L);
-
 
 #endif

ldo.c

@@ -1,19 +1,17 @@
 /*
-** $Id: ldo.c,v 2.149 2015/11/13 13:24:26 roberto Exp roberto $
+** $Id: ldo.c,v 2.108.1.2 2013/04/19 21:03:23 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
 
-#define ldo_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <setjmp.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define ldo_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lapi.h"
@@ -35,8 +33,6 @@
 
 
 
-#define errorstatus(s)	((s) > LUA_YIELD)
-
 
 /*
 ** {======================================================
@@ -50,33 +46,30 @@
 ** C++ code, with _longjmp/_setjmp when asked to use them, and with
 ** longjmp/setjmp otherwise.
 */
-#if !defined(LUAI_THROW)				/* { */
-
-#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)	/* { */
+#if !defined(LUAI_THROW)
 
+#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)
 /* C++ exceptions */
 #define LUAI_THROW(L,c)		throw(c)
 #define LUAI_TRY(L,c,a) \
 	try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; }
 #define luai_jmpbuf		int  /* dummy variable */
 
-#elif defined(LUA_USE_POSIX)				/* }{ */
-
-/* in POSIX, try _longjmp/_setjmp (more efficient) */
+#elif defined(LUA_USE_ULONGJMP)
+/* in Unix, try _longjmp/_setjmp (more efficient) */
 #define LUAI_THROW(L,c)		_longjmp((c)->b, 1)
 #define LUAI_TRY(L,c,a)		if (_setjmp((c)->b) == 0) { a }
 #define luai_jmpbuf		jmp_buf
 
-#else							/* }{ */
-
-/* ISO C handling with long jumps */
+#else
+/* default handling with long jumps */
 #define LUAI_THROW(L,c)		longjmp((c)->b, 1)
 #define LUAI_TRY(L,c,a)		if (setjmp((c)->b) == 0) { a }
 #define luai_jmpbuf		jmp_buf
 
-#endif							/* } */
+#endif
 
-#endif							/* } */
+#endif
 
 
 
@@ -113,19 +106,15 @@ l_noret luaD_throw (lua_State *L, int errcode) {
     LUAI_THROW(L, L->errorJmp);  /* jump to it */
   }
   else {  /* thread has no error handler */
-    global_State *g = G(L);
     L->status = cast_byte(errcode);  /* mark it as dead */
-    if (g->mainthread->errorJmp) {  /* main thread has a handler? */
-      setobjs2s(L, g->mainthread->top++, L->top - 1);  /* copy error obj. */
-      luaD_throw(g->mainthread, errcode);  /* re-throw in main thread */
+    if (G(L)->mainthread->errorJmp) {  /* main thread has a handler? */
+      setobjs2s(L, G(L)->mainthread->top++, L->top - 1);  /* copy error obj. */
+      luaD_throw(G(L)->mainthread, errcode);  /* re-throw in main thread */
     }
     else {  /* no handler at all; abort */
-      if (g->panic) {  /* panic function? */
-        seterrorobj(L, errcode, L->top);  /* assume EXTRA_STACK */
-        if (L->ci->top < L->top)
-          L->ci->top = L->top;  /* pushing msg. can break this invariant */
+      if (G(L)->panic) {  /* panic function? */
         lua_unlock(L);
-        g->panic(L);  /* call panic function (last chance to jump out) */
+        G(L)->panic(L);  /* call it (last chance to jump out) */
       }
       abort();
     }
@@ -150,17 +139,12 @@ int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
 /* }====================================================== */
 
 
-/*
-** {==================================================================
-** Stack reallocation
-** ===================================================================
-*/
 static void correctstack (lua_State *L, TValue *oldstack) {
   CallInfo *ci;
-  UpVal *up;
+  GCObject *up;
   L->top = (L->top - oldstack) + L->stack;
-  for (up = L->openupval; up != NULL; up = up->u.open.next)
-    up->v = (up->v - oldstack) + L->stack;
+  for (up = L->openupval; up != NULL; up = up->gch.next)
+    gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack;
   for (ci = L->ci; ci != NULL; ci = ci->previous) {
     ci->top = (ci->top - oldstack) + L->stack;
     ci->func = (ci->func - oldstack) + L->stack;
@@ -222,26 +206,14 @@ void luaD_shrinkstack (lua_State *L) {
   int inuse = stackinuse(L);
   int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
   if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
-  if (L->stacksize > LUAI_MAXSTACK)  /* was handling stack overflow? */
-    luaE_freeCI(L);  /* free all CIs (list grew because of an error) */
+  if (inuse > LUAI_MAXSTACK ||  /* handling stack overflow? */
+      goodsize >= L->stacksize)  /* would grow instead of shrink? */
+    condmovestack(L);  /* don't change stack (change only for debugging) */
   else
-    luaE_shrinkCI(L);  /* shrink list */
-  if (inuse <= LUAI_MAXSTACK &&  /* not handling stack overflow? */
-      goodsize < L->stacksize)  /* trying to shrink? */
     luaD_reallocstack(L, goodsize);  /* shrink it */
-  else
-    condmovestack(L,,);  /* don't change stack (change only for debugging) */
 }
 
 
-void luaD_inctop (lua_State *L) {
-  luaD_checkstack(L, 1);
-  L->top++;
-}
-
-/* }================================================================== */
-
-
 void luaD_hook (lua_State *L, int event, int line) {
   lua_Hook hook = L->hook;
   if (hook && L->allowhook) {
@@ -286,34 +258,31 @@ static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
   int i;
   int nfixargs = p->numparams;
   StkId base, fixed;
+  lua_assert(actual >= nfixargs);
   /* move fixed parameters to final position */
+  luaD_checkstack(L, p->maxstacksize);  /* check again for new 'base' */
   fixed = L->top - actual;  /* first fixed argument */
   base = L->top;  /* final position of first argument */
-  for (i = 0; i < nfixargs && i < actual; i++) {
+  for (i=0; i<nfixargs; i++) {
     setobjs2s(L, L->top++, fixed + i);
-    setnilvalue(fixed + i);  /* erase original copy (for GC) */
+    setnilvalue(fixed + i);
   }
-  for (; i < nfixargs; i++)
-    setnilvalue(L->top++);  /* complete missing arguments */
   return base;
 }
 
 
-/*
-** Check whether __call metafield of 'func' is a function. If so, put
-** it in stack below original 'func' so that 'luaD_precall' can call
-** it. Raise an error if __call metafield is not a function.
-*/
-static void tryfuncTM (lua_State *L, StkId func) {
+static StkId tryfuncTM (lua_State *L, StkId func) {
   const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL);
   StkId p;
+  ptrdiff_t funcr = savestack(L, func);
   if (!ttisfunction(tm))
     luaG_typeerror(L, func, "call");
-  /* Open a hole inside the stack at 'func' */
-  for (p = L->top; p > func; p--)
-    setobjs2s(L, p, p-1);
-  L->top++;  /* slot ensured by caller */
+  /* Open a hole inside the stack at `func' */
+  for (p = L->top; p > func; p--) setobjs2s(L, p, p-1);
+  incr_top(L);
+  func = restorestack(L, funcr);  /* previous call may change stack */
   setobj2s(L, func, tm);  /* tag method is the new function to be called */
+  return func;
 }
 
 
@@ -321,133 +290,79 @@ static void tryfuncTM (lua_State *L, StkId func) {
 #define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
 
 
-/* macro to check stack size, preserving 'p' */
-#define checkstackp(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' */
-
-
 /*
-** Prepares a function call: checks the stack, creates a new CallInfo
-** entry, fills in the relevant information, calls hook if needed.
-** If function is a C function, does the call, too. (Otherwise, leave
-** the execution ('luaV_execute') to the caller, to allow stackless
-** calls.) Returns true iff function has been executed (C function).
+** returns true if function has been executed (C function)
 */
 int luaD_precall (lua_State *L, StkId func, int nresults) {
   lua_CFunction f;
   CallInfo *ci;
+  int n;  /* number of arguments (Lua) or returns (C) */
+  ptrdiff_t funcr = savestack(L, func);
   switch (ttype(func)) {
-    case LUA_TCCL:  /* C closure */
-      f = clCvalue(func)->f;
-      goto Cfunc;
     case LUA_TLCF:  /* light C function */
       f = fvalue(func);
-     Cfunc: {
-      int n;  /* number of returns */
-      checkstackp(L, LUA_MINSTACK, func);  /* ensure minimum stack size */
+      goto Cfunc;
+    case LUA_TCCL: {  /* C closure */
+      f = clCvalue(func)->f;
+     Cfunc:
+      luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
       ci = next_ci(L);  /* now 'enter' new function */
       ci->nresults = nresults;
-      ci->func = func;
+      ci->func = restorestack(L, funcr);
       ci->top = L->top + LUA_MINSTACK;
       lua_assert(ci->top <= L->stack_last);
       ci->callstatus = 0;
+      luaC_checkGC(L);  /* stack grow uses memory */
       if (L->hookmask & LUA_MASKCALL)
         luaD_hook(L, LUA_HOOKCALL, -1);
       lua_unlock(L);
       n = (*f)(L);  /* do the actual call */
       lua_lock(L);
       api_checknelems(L, n);
-      luaD_poscall(L, ci, L->top - n, n);
+      luaD_poscall(L, L->top - n);
       return 1;
     }
     case LUA_TLCL: {  /* Lua function: prepare its call */
       StkId base;
       Proto *p = clLvalue(func)->p;
-      int n = cast_int(L->top - func) - 1;  /* number of real arguments */
-      int fsize = p->maxstacksize;  /* frame size */
-      checkstackp(L, fsize, func);
-      if (p->is_vararg != 1) {  /* do not use vararg? */
-        for (; n < p->numparams; n++)
-          setnilvalue(L->top++);  /* complete missing arguments */
+      n = cast_int(L->top - func) - 1;  /* number of real arguments */
+      luaD_checkstack(L, p->maxstacksize);
+      for (; n < p->numparams; n++)
+        setnilvalue(L->top++);  /* complete missing arguments */
+      if (!p->is_vararg) {
+        func = restorestack(L, funcr);
         base = func + 1;
       }
-      else
+      else {
         base = adjust_varargs(L, p, n);
+        func = restorestack(L, funcr);  /* previous call can change stack */
+      }
       ci = next_ci(L);  /* now 'enter' new function */
       ci->nresults = nresults;
       ci->func = func;
       ci->u.l.base = base;
-      L->top = ci->top = base + fsize;
+      ci->top = base + p->maxstacksize;
       lua_assert(ci->top <= L->stack_last);
       ci->u.l.savedpc = p->code;  /* starting point */
       ci->callstatus = CIST_LUA;
+      L->top = ci->top;
+      luaC_checkGC(L);  /* stack grow uses memory */
       if (L->hookmask & LUA_MASKCALL)
         callhook(L, ci);
       return 0;
     }
     default: {  /* not a function */
-      checkstackp(L, 1, func);  /* ensure space for metamethod */
-      tryfuncTM(L, func);  /* try to get '__call' metamethod */
+      func = tryfuncTM(L, func);  /* retry with 'function' tag method */
       return luaD_precall(L, func, nresults);  /* now it must be a function */
     }
   }
 }
 
 
-/*
-** Given 'nres' results at 'firstResult', move 'wanted' of them to 'res'.
-** Handle most typical cases (zero results for commands, one result for
-** expressions, multiple results for tail calls/single parameters)
-** separated.
-*/
-static int moveresults (lua_State *L, const TValue *firstResult, StkId res,
-                                      int nres, int wanted) {
-  switch (wanted) {  /* handle typical cases separately */
-    case 0: break;  /* nothing to move */
-    case 1: {  /* one result needed */
-      if (nres == 0)   /* no results? */
-        firstResult = luaO_nilobject;  /* adjust with nil */
-      setobjs2s(L, res, firstResult);  /* move it to proper place */
-      break;
-    }
-    case LUA_MULTRET: {
-      int i;
-      for (i = 0; i < nres; i++)  /* move all results to correct place */
-        setobjs2s(L, res + i, firstResult + i);
-      L->top = res + nres;
-      return 0;  /* wanted == LUA_MULTRET */
-    }
-    default: {
-      int i;
-      if (wanted <= nres) {  /* enough results? */
-        for (i = 0; i < wanted; i++)  /* move wanted results to correct place */
-          setobjs2s(L, res + i, firstResult + i);
-      }
-      else {  /* not enough results; use all of them plus nils */
-        for (i = 0; i < nres; i++)  /* move all results to correct place */
-          setobjs2s(L, res + i, firstResult + i);
-        for (; i < wanted; i++)  /* complete wanted number of results */
-          setnilvalue(res + i);
-      }
-      break;
-    }
-  }
-  L->top = res + wanted;  /* top points after the last result */
-  return 1;
-}
-
-
-/*
-** Finishes a function call: calls hook if necessary, removes CallInfo,
-** moves current number of results to proper place; returns 0 iff call
-** wanted multiple (variable number of) results.
-*/
-int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
+int luaD_poscall (lua_State *L, StkId firstResult) {
   StkId res;
-  int wanted = ci->nresults;
+  int wanted, i;
+  CallInfo *ci = L->ci;
   if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) {
     if (L->hookmask & LUA_MASKRET) {
       ptrdiff_t fr = savestack(L, firstResult);  /* hook may change stack */
@@ -457,24 +372,15 @@ int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult, int nres) {
     L->oldpc = ci->previous->u.l.savedpc;  /* 'oldpc' for caller function */
   }
   res = ci->func;  /* res == final position of 1st result */
-  L->ci = ci->previous;  /* back to caller */
-  /* move results to proper place */
-  return moveresults(L, firstResult, res, nres, wanted);
-}
-
-
-/*
-** Check appropriate error for stack overflow ("regular" overflow or
-** overflow while handling stack overflow). If 'nCalls' is larger than
-** LUAI_MAXCCALLS (which means it is handling a "regular" overflow) but
-** smaller than 9/8 of LUAI_MAXCCALLS, does not report an error (to
-** allow overflow handling to work)
-*/
-static void stackerror (lua_State *L) {
-  if (L->nCcalls == LUAI_MAXCCALLS)
-    luaG_runerror(L, "C stack overflow");
-  else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
-    luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */
+  wanted = ci->nresults;
+  L->ci = ci = ci->previous;  /* back to caller */
+  /* move results to correct place */
+  for (i = wanted; i != 0 && firstResult < L->top; i--)
+    setobjs2s(L, res++, firstResult++);
+  while (i-- > 0)
+    setnilvalue(res++);
+  L->top = res;
+  return (wanted - LUA_MULTRET);  /* 0 iff wanted == LUA_MULTRET */
 }
 
 
@@ -484,67 +390,53 @@ static void stackerror (lua_State *L) {
 ** When returns, all the results are on the stack, starting at the original
 ** function position.
 */
-void luaD_call (lua_State *L, StkId func, int nResults) {
-  if (++L->nCcalls >= LUAI_MAXCCALLS)
-    stackerror(L);
+void luaD_call (lua_State *L, StkId func, int nResults, int allowyield) {
+  if (++L->nCcalls >= LUAI_MAXCCALLS) {
+    if (L->nCcalls == LUAI_MAXCCALLS)
+      luaG_runerror(L, "C stack overflow");
+    else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
+      luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */
+  }
+  if (!allowyield) L->nny++;
   if (!luaD_precall(L, func, nResults))  /* is a Lua function? */
     luaV_execute(L);  /* call it */
+  if (!allowyield) L->nny--;
   L->nCcalls--;
 }
 
 
-/*
-** Similar to 'luaD_call', but does not allow yields during the call
-*/
-void luaD_callnoyield (lua_State *L, StkId func, int nResults) {
-  L->nny++;
-  luaD_call(L, func, nResults);
-  L->nny--;
-}
-
-
-/*
-** Completes the execution of an interrupted C function, calling its
-** continuation function.
-*/
-static void finishCcall (lua_State *L, int status) {
+static void finishCcall (lua_State *L) {
   CallInfo *ci = L->ci;
   int n;
-  /* must have a continuation and must be able to call it */
-  lua_assert(ci->u.c.k != NULL && L->nny == 0);
-  /* error status can only happen in a protected call */
-  lua_assert((ci->callstatus & CIST_YPCALL) || status == LUA_YIELD);
+  lua_assert(ci->u.c.k != NULL);  /* must have a continuation */
+  lua_assert(L->nny == 0);
   if (ci->callstatus & CIST_YPCALL) {  /* was inside a pcall? */
     ci->callstatus &= ~CIST_YPCALL;  /* finish 'lua_pcall' */
     L->errfunc = ci->u.c.old_errfunc;
   }
-  /* finish 'lua_callk'/'lua_pcall'; CIST_YPCALL and 'errfunc' already
-     handled */
+  /* finish 'lua_callk'/'lua_pcall' */
   adjustresults(L, ci->nresults);
   /* call continuation function */
+  if (!(ci->callstatus & CIST_STAT))  /* no call status? */
+    ci->u.c.status = LUA_YIELD;  /* 'default' status */
+  lua_assert(ci->u.c.status != LUA_OK);
+  ci->callstatus = (ci->callstatus & ~(CIST_YPCALL | CIST_STAT)) | CIST_YIELDED;
   lua_unlock(L);
-  n = (*ci->u.c.k)(L, status, ci->u.c.ctx);
+  n = (*ci->u.c.k)(L);
   lua_lock(L);
   api_checknelems(L, n);
   /* finish 'luaD_precall' */
-  luaD_poscall(L, ci, L->top - n, n);
+  luaD_poscall(L, L->top - n);
 }
 
 
-/*
-** Executes "full continuation" (everything in the stack) of a
-** previously interrupted coroutine until the stack is empty (or another
-** interruption long-jumps out of the loop). If the coroutine is
-** recovering from an error, 'ud' points to the error status, which must
-** be passed to the first continuation function (otherwise the default
-** status is LUA_YIELD).
-*/
 static void unroll (lua_State *L, void *ud) {
-  if (ud != NULL)  /* error status? */
-    finishCcall(L, *(int *)ud);  /* finish 'lua_pcallk' callee */
-  while (L->ci != &L->base_ci) {  /* something in the stack */
+  UNUSED(ud);
+  for (;;) {
+    if (L->ci == &L->base_ci)  /* stack is empty? */
+      return;  /* coroutine finished normally */
     if (!isLua(L->ci))  /* C function? */
-      finishCcall(L, LUA_YIELD);  /* complete its execution */
+      finishCcall(L);
     else {  /* Lua function */
       luaV_finishOp(L);  /* finish interrupted instruction */
       luaV_execute(L);  /* execute down to higher C 'boundary' */
@@ -554,8 +446,7 @@ static void unroll (lua_State *L, void *ud) {
 
 
 /*
-** Try to find a suspended protected call (a "recover point") for the
-** given thread.
+** check whether thread has a suspended protected call
 */
 static CallInfo *findpcall (lua_State *L) {
   CallInfo *ci;
@@ -567,11 +458,6 @@ static CallInfo *findpcall (lua_State *L) {
 }
 
 
-/*
-** Recovers from an error in a coroutine. Finds a recover point (if
-** there is one) and completes the execution of the interrupted
-** 'luaD_pcall'. If there is no recover point, returns zero.
-*/
 static int recover (lua_State *L, int status) {
   StkId oldtop;
   CallInfo *ci = findpcall(L);
@@ -581,10 +467,12 @@ static int recover (lua_State *L, int status) {
   luaF_close(L, oldtop);
   seterrorobj(L, status, oldtop);
   L->ci = ci;
-  L->allowhook = getoah(ci->callstatus);  /* restore original 'allowhook' */
+  L->allowhook = ci->u.c.old_allowhook;
   L->nny = 0;  /* should be zero to be yieldable */
   luaD_shrinkstack(L);
   L->errfunc = ci->u.c.old_errfunc;
+  ci->callstatus |= CIST_STAT;  /* call has error status */
+  ci->u.c.status = status;  /* (here it is) */
   return 1;  /* continue running the coroutine */
 }
 
@@ -603,16 +491,11 @@ static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
 
 
 /*
-** Do the work for 'lua_resume' in protected mode. Most of the work
-** depends on the status of the coroutine: initial state, suspended
-** inside a hook, or regularly suspended (optionally with a continuation
-** function), plus erroneous cases: non-suspended coroutine or dead
-** coroutine.
+** do the work for 'lua_resume' in protected mode
 */
 static void resume (lua_State *L, void *ud) {
   int nCcalls = L->nCcalls;
-  int n = *(cast(int*, ud));  /* number of arguments */
-  StkId firstArg = L->top - n;  /* first argument */
+  StkId firstArg = cast(StkId, ud);
   CallInfo *ci = L->ci;
   if (nCcalls >= LUAI_MAXCCALLS)
     resume_error(L, "C stack overflow", firstArg);
@@ -626,21 +509,24 @@ static void resume (lua_State *L, void *ud) {
   else if (L->status != LUA_YIELD)
     resume_error(L, "cannot resume dead coroutine", firstArg);
   else {  /* resuming from previous yield */
-    L->status = LUA_OK;  /* mark that it is running (again) */
+    L->status = LUA_OK;
     ci->func = restorestack(L, ci->extra);
     if (isLua(ci))  /* yielded inside a hook? */
       luaV_execute(L);  /* just continue running Lua code */
     else {  /* 'common' yield */
-      if (ci->u.c.k != NULL) {  /* does it have a continuation function? */
+      if (ci->u.c.k != NULL) {  /* does it have a continuation? */
+        int n;
+        ci->u.c.status = LUA_YIELD;  /* 'default' status */
+        ci->callstatus |= CIST_YIELDED;
         lua_unlock(L);
-        n = (*ci->u.c.k)(L, LUA_YIELD, ci->u.c.ctx); /* call continuation */
+        n = (*ci->u.c.k)(L);  /* call continuation */
         lua_lock(L);
         api_checknelems(L, n);
         firstArg = L->top - n;  /* yield results come from continuation */
       }
-      luaD_poscall(L, ci, firstArg, n);  /* finish 'luaD_precall' */
+      luaD_poscall(L, firstArg);  /* finish 'luaD_precall' */
     }
-    unroll(L, NULL);  /* run continuation */
+    unroll(L, NULL);
   }
   lua_assert(nCcalls == L->nCcalls);
 }
@@ -648,26 +534,27 @@ static void resume (lua_State *L, void *ud) {
 
 LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
   int status;
-  unsigned short oldnny = L->nny;  /* save "number of non-yieldable" calls */
+  int oldnny = L->nny;  /* save 'nny' */
   lua_lock(L);
   luai_userstateresume(L, nargs);
   L->nCcalls = (from) ? from->nCcalls + 1 : 1;
   L->nny = 0;  /* allow yields */
   api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
-  status = luaD_rawrunprotected(L, resume, &nargs);
+  status = luaD_rawrunprotected(L, resume, L->top - nargs);
   if (status == -1)  /* error calling 'lua_resume'? */
     status = LUA_ERRRUN;
-  else {  /* continue running after recoverable errors */
-    while (errorstatus(status) && recover(L, status)) {
-      /* unroll continuation */
-      status = luaD_rawrunprotected(L, unroll, &status);
+  else {  /* yield or regular error */
+    while (status != LUA_OK && status != LUA_YIELD) {  /* error? */
+      if (recover(L, status))  /* recover point? */
+        status = luaD_rawrunprotected(L, unroll, NULL);  /* run continuation */
+      else {  /* unrecoverable error */
+        L->status = cast_byte(status);  /* mark thread as `dead' */
+        seterrorobj(L, status, L->top);
+        L->ci->top = L->top;
+        break;
+      }
     }
-    if (errorstatus(status)) {  /* unrecoverable error? */
-      L->status = cast_byte(status);  /* mark thread as 'dead' */
-      seterrorobj(L, status, L->top);  /* push error message */
-      L->ci->top = L->top;
-    }
-    else lua_assert(status == L->status);  /* normal end or yield */
+    lua_assert(status == L->status);
   }
   L->nny = oldnny;  /* restore 'nny' */
   L->nCcalls--;
@@ -677,13 +564,7 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
 }
 
 
-LUA_API int lua_isyieldable (lua_State *L) {
-  return (L->nny == 0);
-}
-
-
-LUA_API int lua_yieldk (lua_State *L, int nresults, lua_KContext ctx,
-                        lua_KFunction k) {
+LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) {
   CallInfo *ci = L->ci;
   luai_userstateyield(L, nresults);
   lua_lock(L);
@@ -738,7 +619,7 @@ int luaD_pcall (lua_State *L, Pfunc func, void *u,
 /*
 ** Execute a protected parser.
 */
-struct SParser {  /* data to 'f_parser' */
+struct SParser {  /* data to `f_parser' */
   ZIO *z;
   Mbuffer buff;  /* dynamic structure used by the scanner */
   Dyndata dyd;  /* dynamic structures used by the parser */
@@ -750,26 +631,31 @@ struct SParser {  /* data to 'f_parser' */
 static void checkmode (lua_State *L, const char *mode, const char *x) {
   if (mode && strchr(mode, x[0]) == NULL) {
     luaO_pushfstring(L,
-       "attempt to load a %s chunk (mode is '%s')", x, mode);
+       "attempt to load a %s chunk (mode is " LUA_QS ")", x, mode);
     luaD_throw(L, LUA_ERRSYNTAX);
   }
 }
 
 
 static void f_parser (lua_State *L, void *ud) {
-  LClosure *cl;
+  int i;
+  Closure *cl;
   struct SParser *p = cast(struct SParser *, ud);
   int c = zgetc(p->z);  /* read first character */
   if (c == LUA_SIGNATURE[0]) {
     checkmode(L, p->mode, "binary");
-    cl = luaU_undump(L, p->z, p->name);
+    cl = luaU_undump(L, p->z, &p->buff, p->name);
   }
   else {
     checkmode(L, p->mode, "text");
     cl = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c);
   }
-  lua_assert(cl->nupvalues == cl->p->sizeupvalues);
-  luaF_initupvals(L, cl);
+  lua_assert(cl->l.nupvalues == cl->l.p->sizeupvalues);
+  for (i = 0; i < cl->l.nupvalues; i++) {  /* initialize upvalues */
+    UpVal *up = luaF_newupval(L);
+    cl->l.upvals[i] = up;
+    luaC_objbarrier(L, cl, up);
+  }
 }
 
 

ldo.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.h,v 2.27 2015/11/19 19:16:22 roberto Exp roberto $
+** $Id: ldo.h,v 2.20 2011/11/29 15:55:08 roberto Exp $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -13,43 +13,31 @@
 #include "lzio.h"
 
 
-/*
-** 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.
-** 'condmovestack' is used in heavy tests to force a stack reallocation
-** at every check.
-*/
-#define luaD_checkstackaux(L,n,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,,)
+#define luaD_checkstack(L,n)	if (L->stack_last - L->top <= (n)) \
+				    luaD_growstack(L, n); else condmovestack(L);
 
 
+#define incr_top(L) {L->top++; luaD_checkstack(L,0);}
 
 #define savestack(L,p)		((char *)(p) - (char *)L->stack)
 #define restorestack(L,n)	((TValue *)((char *)L->stack + (n)))
 
 
-/* type of protected functions, to be ran by 'runprotected' */
+/* type of protected functions, to be ran by `runprotected' */
 typedef void (*Pfunc) (lua_State *L, void *ud);
 
 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);
 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_call (lua_State *L, StkId func, int nResults,
+                                        int allowyield);
 LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
                                         ptrdiff_t oldtop, ptrdiff_t ef);
-LUAI_FUNC int luaD_poscall (lua_State *L, CallInfo *ci, StkId firstResult,
-                                          int nres);
+LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
 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);
 
 LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);

ldump.c

@@ -1,215 +1,173 @@
 /*
-** $Id: ldump.c,v 2.36 2015/03/30 15:43:51 roberto Exp roberto $
+** $Id: ldump.c,v 2.17 2012/01/23 23:02:10 roberto Exp $
 ** save precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
 
+#include <stddef.h>
+
 #define ldump_c
 #define LUA_CORE
 
-#include "lprefix.h"
-
-
-#include <stddef.h>
-
 #include "lua.h"
 
 #include "lobject.h"
 #include "lstate.h"
 #include "lundump.h"
 
-
 typedef struct {
-  lua_State *L;
-  lua_Writer writer;
-  void *data;
-  int strip;
-  int status;
+ lua_State* L;
+ lua_Writer writer;
+ void* data;
+ int strip;
+ int status;
 } DumpState;
 
+#define DumpMem(b,n,size,D)	DumpBlock(b,(n)*(size),D)
+#define DumpVar(x,D)		DumpMem(&x,1,sizeof(x),D)
 
-/*
-** All high-level dumps go through DumpVector; you can change it to
-** change the endianness of the result
-*/
-#define DumpVector(v,n,D)	DumpBlock(v,(n)*sizeof((v)[0]),D)
+static void DumpBlock(const void* b, size_t size, DumpState* D)
+{
+ if (D->status==0)
+ {
+  lua_unlock(D->L);
+  D->status=(*D->writer)(D->L,b,size,D->data);
+  lua_lock(D->L);
+ }
+}
 
-#define DumpLiteral(s,D)	DumpBlock(s, sizeof(s) - sizeof(char), D)
+static void DumpChar(int y, DumpState* D)
+{
+ char x=(char)y;
+ DumpVar(x,D);
+}
 
+static void DumpInt(int x, DumpState* D)
+{
+ DumpVar(x,D);
+}
 
-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);
-    lua_lock(D->L);
+static void DumpNumber(lua_Number x, DumpState* D)
+{
+ DumpVar(x,D);
+}
+
+static void DumpVector(const void* b, int n, size_t size, DumpState* D)
+{
+ DumpInt(n,D);
+ DumpMem(b,n,size,D);
+}
+
+static void DumpString(const TString* s, DumpState* D)
+{
+ if (s==NULL)
+ {
+  size_t size=0;
+  DumpVar(size,D);
+ }
+ else
+ {
+  size_t size=s->tsv.len+1;		/* include trailing '\0' */
+  DumpVar(size,D);
+  DumpBlock(getstr(s),size*sizeof(char),D);
+ }
+}
+
+#define DumpCode(f,D)	 DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
+
+static void DumpFunction(const Proto* f, DumpState* D);
+
+static void DumpConstants(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizek;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  const TValue* o=&f->k[i];
+  DumpChar(ttypenv(o),D);
+  switch (ttypenv(o))
+  {
+   case LUA_TNIL:
+	break;
+   case LUA_TBOOLEAN:
+	DumpChar(bvalue(o),D);
+	break;
+   case LUA_TNUMBER:
+	DumpNumber(nvalue(o),D);
+	break;
+   case LUA_TSTRING:
+	DumpString(rawtsvalue(o),D);
+	break;
+    default: lua_assert(0);
   }
+ }
+ n=f->sizep;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpFunction(f->p[i],D);
 }
 
-
-#define DumpVar(x,D)		DumpVector(&x,1,D)
-
-
-static void DumpByte (int y, DumpState *D) {
-  lu_byte x = (lu_byte)y;
-  DumpVar(x, D);
+static void DumpUpvalues(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  DumpChar(f->upvalues[i].instack,D);
+  DumpChar(f->upvalues[i].idx,D);
+ }
 }
 
-
-static void DumpInt (int x, DumpState *D) {
-  DumpVar(x, D);
+static void DumpDebug(const Proto* f, DumpState* D)
+{
+ int i,n;
+ DumpString((D->strip) ? NULL : f->source,D);
+ n= (D->strip) ? 0 : f->sizelineinfo;
+ DumpVector(f->lineinfo,n,sizeof(int),D);
+ n= (D->strip) ? 0 : f->sizelocvars;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  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(n,D);
+ for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
 }
 
-
-static void DumpNumber (lua_Number x, DumpState *D) {
-  DumpVar(x, D);
+static void DumpFunction(const Proto* f, DumpState* D)
+{
+ DumpInt(f->linedefined,D);
+ DumpInt(f->lastlinedefined,D);
+ DumpChar(f->numparams,D);
+ DumpChar(f->is_vararg,D);
+ DumpChar(f->maxstacksize,D);
+ DumpCode(f,D);
+ DumpConstants(f,D);
+ DumpUpvalues(f,D);
+ DumpDebug(f,D);
 }
 
-
-static void DumpInteger (lua_Integer x, DumpState *D) {
-  DumpVar(x, D);
+static void DumpHeader(DumpState* D)
+{
+ lu_byte h[LUAC_HEADERSIZE];
+ luaU_header(h);
+ DumpBlock(h,LUAC_HEADERSIZE,D);
 }
 
-
-static void DumpString (const TString *s, DumpState *D) {
-  if (s == NULL)
-    DumpByte(0, D);
-  else {
-    size_t size = tsslen(s) + 1;  /* include trailing '\0' */
-    const char *str = getstr(s);
-    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 (const Proto *f, DumpState *D) {
-  DumpInt(f->sizecode, D);
-  DumpVector(f->code, f->sizecode, D);
-}
-
-
-static void DumpFunction(const Proto *f, TString *psource, DumpState *D);
-
-static void DumpConstants (const Proto *f, DumpState *D) {
-  int i;
-  int n = f->sizek;
-  DumpInt(n, D);
-  for (i = 0; i < n; i++) {
-    const TValue *o = &f->k[i];
-    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 (const Proto *f, DumpState *D) {
-  int i;
-  int n = f->sizep;
-  DumpInt(n, D);
-  for (i = 0; i < n; i++)
-    DumpFunction(f->p[i], f->source, D);
-}
-
-
-static void DumpUpvalues (const Proto *f, DumpState *D) {
-  int i, n = f->sizeupvalues;
-  DumpInt(n, D);
-  for (i = 0; i < n; i++) {
-    DumpByte(f->upvalues[i].instack, D);
-    DumpByte(f->upvalues[i].idx, D);
-  }
-}
-
-
-static void DumpDebug (const Proto *f, DumpState *D) {
-  int i, n;
-  n = (D->strip) ? 0 : f->sizelineinfo;
-  DumpInt(n, D);
-  DumpVector(f->lineinfo, n, D);
-  n = (D->strip) ? 0 : f->sizelocvars;
-  DumpInt(n, D);
-  for (i = 0; i < n; i++) {
-    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(n, D);
-  for (i = 0; i < n; i++)
-    DumpString(f->upvalues[i].name, D);
-}
-
-
-static void DumpFunction (const Proto *f, TString *psource, DumpState *D) {
-  if (D->strip || f->source == psource)
-    DumpString(NULL, D);  /* no debug info or same source as its parent */
-  else
-    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(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);
-}
-
-
 /*
 ** dump Lua function as precompiled chunk
 */
-int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
-              int strip) {
-  DumpState D;
-  D.L = L;
-  D.writer = w;
-  D.data = data;
-  D.strip = strip;
-  D.status = 0;
-  DumpHeader(&D);
-  DumpByte(f->sizeupvalues, &D);
-  DumpFunction(f, NULL, &D);
-  return D.status;
+int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
+{
+ DumpState D;
+ D.L=L;
+ D.writer=w;
+ D.data=data;
+ D.strip=strip;
+ D.status=0;
+ DumpHeader(&D);
+ DumpFunction(f,&D);
+ return D.status;
 }
-

lfunc.c

@@ -1,17 +1,15 @@
 /*
-** $Id: lfunc.c,v 2.44 2014/10/25 11:50:46 roberto Exp roberto $
+** $Id: lfunc.c,v 2.30 2012/10/03 12:36:46 roberto Exp $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
 
-#define lfunc_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <stddef.h>
 
+#define lfunc_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lfunc.h"
@@ -22,83 +20,95 @@
 
 
 
-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(n);
+Closure *luaF_newCclosure (lua_State *L, int n) {
+  Closure *c = &luaC_newobj(L, LUA_TCCL, sizeCclosure(n), NULL, 0)->cl;
+  c->c.nupvalues = cast_byte(n);
   return c;
 }
 
 
-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(n);
-  while (n--) c->upvals[n] = NULL;
+Closure *luaF_newLclosure (lua_State *L, int n) {
+  Closure *c = &luaC_newobj(L, LUA_TLCL, sizeLclosure(n), NULL, 0)->cl;
+  c->l.p = NULL;
+  c->l.nupvalues = cast_byte(n);
+  while (n--) c->l.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++) {
-    UpVal *uv = luaM_new(L, UpVal);
-    uv->refcount = 1;
-    uv->v = &uv->u.value;  /* make it closed */
-    setnilvalue(uv->v);
-    cl->upvals[i] = uv;
-  }
+
+UpVal *luaF_newupval (lua_State *L) {
+  UpVal *uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), NULL, 0)->uv;
+  uv->v = &uv->u.value;
+  setnilvalue(uv->v);
+  return uv;
 }
 
 
 UpVal *luaF_findupval (lua_State *L, StkId level) {
-  UpVal **pp = &L->openupval;
+  global_State *g = G(L);
+  GCObject **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;
+  while (*pp != NULL && (p = gco2uv(*pp))->v >= level) {
+    GCObject *o = obj2gco(p);
+    lua_assert(p->v != &p->u.value);
+    lua_assert(!isold(o) || isold(obj2gco(L)));
+    if (p->v == level) {  /* found a corresponding upvalue? */
+      if (isdead(g, o))  /* is it dead? */
+        changewhite(o);  /* resurrect it */
+      return p;
+    }
+    pp = &p->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;
+  /* not found: create a new one */
+  uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), pp, 0)->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;
-  }
+  uv->u.l.prev = &g->uvhead;  /* double link it in `uvhead' list */
+  uv->u.l.next = g->uvhead.u.l.next;
+  uv->u.l.next->u.l.prev = uv;
+  g->uvhead.u.l.next = uv;
+  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
   return uv;
 }
 
 
+static void unlinkupval (UpVal *uv) {
+  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
+  uv->u.l.next->u.l.prev = uv->u.l.prev;  /* remove from `uvhead' list */
+  uv->u.l.prev->u.l.next = uv->u.l.next;
+}
+
+
+void luaF_freeupval (lua_State *L, UpVal *uv) {
+  if (uv->v != &uv->u.value)  /* is it open? */
+    unlinkupval(uv);  /* remove from open list */
+  luaM_free(L, uv);  /* free upvalue */
+}
+
+
 void luaF_close (lua_State *L, StkId level) {
   UpVal *uv;
-  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 */
+  global_State *g = G(L);
+  while (L->openupval != NULL && (uv = gco2uv(L->openupval))->v >= level) {
+    GCObject *o = obj2gco(uv);
+    lua_assert(!isblack(o) && uv->v != &uv->u.value);
+    L->openupval = uv->next;  /* remove from `open' list */
+    if (isdead(g, o))
+      luaF_freeupval(L, uv);  /* free upvalue */
     else {
+      unlinkupval(uv);  /* remove upvalue from 'uvhead' list */
       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);
+      gch(o)->next = g->allgc;  /* link upvalue into 'allgc' list */
+      g->allgc = o;
+      luaC_checkupvalcolor(g, uv);
     }
   }
 }
 
 
 Proto *luaF_newproto (lua_State *L) {
-  GCObject *o = luaC_newobj(L, LUA_TPROTO, sizeof(Proto));
-  Proto *f = gco2p(o);
+  Proto *f = &luaC_newobj(L, LUA_TPROTO, sizeof(Proto), NULL, 0)->p;
   f->k = NULL;
   f->sizek = 0;
   f->p = NULL;
@@ -134,7 +144,7 @@ void luaF_freeproto (lua_State *L, Proto *f) {
 
 
 /*
-** Look for n-th local variable at line 'line' in function 'func'.
+** Look for n-th local variable at line `line' in function `func'.
 ** Returns NULL if not found.
 */
 const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {

lfunc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.h,v 2.14 2014/06/19 18:27:20 roberto Exp roberto $
+** $Id: lfunc.h,v 2.8 2012/05/08 13:53:33 roberto Exp $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -18,42 +18,14 @@
                          cast(int, sizeof(TValue *)*((n)-1)))
 
 
-/* test whether thread is in 'twups' list */
-#define isintwups(L)	(L->twups != L)
-
-
-/*
-** maximum number of upvalues in a closure (both C and Lua). (Value
-** must fit in a VM register.)
-*/
-#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)
-
-
 LUAI_FUNC Proto *luaF_newproto (lua_State *L);
-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 Closure *luaF_newCclosure (lua_State *L, int nelems);
+LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems);
+LUAI_FUNC UpVal *luaF_newupval (lua_State *L);
 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
 LUAI_FUNC void luaF_close (lua_State *L, StkId level);
 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
+LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
                                          int pc);
 

lgc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.h,v 2.89 2015/10/20 18:00:19 roberto Exp roberto $
+** $Id: lgc.h,v 2.58 2012/09/11 12:53:08 roberto Exp $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -38,27 +38,36 @@
 */
 #define GCSpropagate	0
 #define GCSatomic	1
-#define GCSswpallgc	2
-#define GCSswpfinobj	3
-#define GCSswptobefnz	4
-#define GCSswpend	5
-#define GCScallfin	6
-#define GCSpause	7
+#define GCSsweepstring	2
+#define GCSsweepudata	3
+#define GCSsweep	4
+#define GCSpause	5
 
 
 #define issweepphase(g)  \
-	(GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
+	(GCSsweepstring <= (g)->gcstate && (g)->gcstate <= GCSsweep)
+
+#define isgenerational(g)	((g)->gckind == KGC_GEN)
+
+/*
+** macros to tell when main invariant (white objects cannot point to black
+** ones) must be kept. During a non-generational collection, the sweep
+** phase may break the invariant, as objects turned white may point to
+** still-black objects. The invariant is restored when sweep ends and
+** all objects are white again. During a generational collection, the
+** invariant must be kept all times.
+*/
+
+#define keepinvariant(g)	(isgenerational(g) || g->gcstate <= GCSatomic)
 
 
 /*
-** macro to tell when main invariant (white objects cannot point to black
-** ones) must be kept. During a collection, the sweep
-** phase may break the invariant, as objects turned white may point to
-** still-black objects. The invariant is restored when sweep ends and
-** all objects are white again.
+** Outside the collector, the state in generational mode is kept in
+** 'propagate', so 'keepinvariant' is always true.
 */
-
-#define keepinvariant(g)	((g)->gcstate <= GCSatomic)
+#define keepinvariantout(g)  \
+  check_exp(g->gcstate == GCSpropagate || !isgenerational(g),  \
+            g->gcstate <= GCSatomic)
 
 
 /*
@@ -74,74 +83,75 @@
 #define testbit(x,b)		testbits(x, bitmask(b))
 
 
-/* Layout for bit use in 'marked' field: */
+/* 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 */
+#define FINALIZEDBIT	3  /* object has been separated for finalization */
+#define SEPARATED	4  /* object is in 'finobj' list or in 'tobefnz' */
+#define FIXEDBIT	5  /* object is fixed (should not be collected) */
+#define OLDBIT		6  /* object is old (only in generational mode) */
 /* bit 7 is currently used by tests (luaL_checkmemory) */
 
 #define WHITEBITS	bit2mask(WHITE0BIT, WHITE1BIT)
 
 
-#define iswhite(x)      testbits((x)->marked, WHITEBITS)
-#define isblack(x)      testbit((x)->marked, BLACKBIT)
+#define iswhite(x)      testbits((x)->gch.marked, WHITEBITS)
+#define isblack(x)      testbit((x)->gch.marked, BLACKBIT)
 #define isgray(x)  /* neither white nor black */  \
-	(!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))
+	(!testbits((x)->gch.marked, WHITEBITS | bitmask(BLACKBIT)))
 
-#define tofinalize(x)	testbit((x)->marked, FINALIZEDBIT)
+#define isold(x)	testbit((x)->gch.marked, OLDBIT)
 
-#define otherwhite(g)	((g)->currentwhite ^ WHITEBITS)
+/* MOVE OLD rule: whenever an object is moved to the beginning of
+   a GC list, its old bit must be cleared */
+#define resetoldbit(o)	resetbit((o)->gch.marked, OLDBIT)
+
+#define otherwhite(g)	(g->currentwhite ^ WHITEBITS)
 #define isdeadm(ow,m)	(!(((m) ^ WHITEBITS) & (ow)))
-#define isdead(g,v)	isdeadm(otherwhite(g), (v)->marked)
+#define isdead(g,v)	isdeadm(otherwhite(g), (v)->gch.marked)
 
-#define changewhite(x)	((x)->marked ^= WHITEBITS)
-#define gray2black(x)	l_setbit((x)->marked, BLACKBIT)
+#define changewhite(x)	((x)->gch.marked ^= WHITEBITS)
+#define gray2black(x)	l_setbit((x)->gch.marked, BLACKBIT)
+
+#define valiswhite(x)	(iscollectable(x) && iswhite(gcvalue(x)))
 
 #define luaC_white(g)	cast(lu_byte, (g)->currentwhite & WHITEBITS)
 
 
-/*
-** Does one step of collection when debt becomes positive. 'pre'/'pos'
-** allows some adjustments to be done only when needed. macro
-** 'condchangemem' is used only for heavy tests (forcing a full
-** GC cycle on every opportunity)
-*/
-#define luaC_condGC(L,pre,pos) \
-	{ if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \
-	  condchangemem(L,pre,pos); }
-
-/* more often than not, 'pre'/'pos' are empty */
-#define luaC_checkGC(L)		luaC_condGC(L,,)
+#define luaC_condGC(L,c) \
+	{if (G(L)->GCdebt > 0) {c;}; condchangemem(L);}
+#define luaC_checkGC(L)		luaC_condGC(L, luaC_step(L);)
 
 
-#define luaC_barrier(L,p,v) (  \
-	(iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ?  \
-	luaC_barrier_(L,obj2gco(p),gcvalue(v)) : cast_void(0))
+#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p)))  \
+	luaC_barrier_(L,obj2gco(p),gcvalue(v)); }
 
-#define luaC_barrierback(L,p,v) (  \
-	(iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \
-	luaC_barrierback_(L,p) : cast_void(0))
+#define luaC_barrierback(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p)))  \
+	luaC_barrierback_(L,p); }
 
-#define luaC_objbarrier(L,p,o) (  \
-	(isblack(p) && iswhite(o)) ? \
-	luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))
+#define luaC_objbarrier(L,p,o)  \
+	{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
+		luaC_barrier_(L,obj2gco(p),obj2gco(o)); }
 
-#define luaC_upvalbarrier(L,uv) ( \
-	(iscollectable((uv)->v) && !upisopen(uv)) ? \
-         luaC_upvalbarrier_(L,uv) : cast_void(0))
+#define luaC_objbarrierback(L,p,o)  \
+   { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) luaC_barrierback_(L,p); }
+
+#define luaC_barrierproto(L,p,c) \
+   { if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); }
 
-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);
+LUAI_FUNC void luaC_forcestep (lua_State *L);
 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 GCObject *luaC_newobj (lua_State *L, int tt, size_t sz,
+                                 GCObject **list, int offset);
 LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
-LUAI_FUNC void luaC_barrierback_ (lua_State *L, Table *o);
-LUAI_FUNC void luaC_upvalbarrier_ (lua_State *L, UpVal *uv);
+LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
+LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c);
 LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
-LUAI_FUNC void luaC_upvdeccount (lua_State *L, UpVal *uv);
-
+LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv);
+LUAI_FUNC void luaC_changemode (lua_State *L, int mode);
 
 #endif

linit.c

@@ -1,33 +1,20 @@
 /*
-** $Id: linit.c,v 1.37 2014/12/09 15:00:17 roberto Exp roberto $
+** $Id: linit.c,v 1.32 2011/04/08 19:17:36 roberto Exp $
 ** Initialization of libraries for lua.c and other clients
 ** See Copyright Notice in lua.h
 */
 
 
-#define linit_c
-#define LUA_LIB
-
 /*
 ** If you embed Lua in your program and need to open the standard
 ** libraries, call luaL_openlibs in your program. If you need a
 ** different set of libraries, copy this file to your project and edit
 ** it to suit your needs.
-**
-** You can also *preload* libraries, so that a later 'require' can
-** open the library, which is already linked to the application.
-** For that, do the following code:
-**
-**  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
-**  lua_pushcfunction(L, luaopen_modname);
-**  lua_setfield(L, -2, modname);
-**  lua_pop(L, 1);  // remove _PRELOAD table
 */
 
-#include "lprefix.h"
 
-
-#include <stddef.h>
+#define linit_c
+#define LUA_LIB
 
 #include "lua.h"
 
@@ -47,22 +34,34 @@ static const luaL_Reg loadedlibs[] = {
   {LUA_IOLIBNAME, luaopen_io},
   {LUA_OSLIBNAME, luaopen_os},
   {LUA_STRLIBNAME, luaopen_string},
-  {LUA_MATHLIBNAME, luaopen_math},
-  {LUA_UTF8LIBNAME, luaopen_utf8},
-  {LUA_DBLIBNAME, luaopen_debug},
-#if defined(LUA_COMPAT_BITLIB)
   {LUA_BITLIBNAME, luaopen_bit32},
-#endif
+  {LUA_MATHLIBNAME, luaopen_math},
+  {LUA_DBLIBNAME, luaopen_debug},
+  {NULL, NULL}
+};
+
+
+/*
+** these libs are preloaded and must be required before used
+*/
+static const luaL_Reg preloadedlibs[] = {
   {NULL, NULL}
 };
 
 
 LUALIB_API void luaL_openlibs (lua_State *L) {
   const luaL_Reg *lib;
-  /* "require" functions from 'loadedlibs' and set results to global table */
+  /* call open functions from 'loadedlibs' and set results to global table */
   for (lib = loadedlibs; lib->func; lib++) {
     luaL_requiref(L, lib->name, lib->func, 1);
     lua_pop(L, 1);  /* remove lib */
   }
+  /* add open functions from 'preloadedlibs' into 'package.preload' table */
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
+  for (lib = preloadedlibs; lib->func; lib++) {
+    lua_pushcfunction(L, lib->func);
+    lua_setfield(L, -2, lib->name);
+  }
+  lua_pop(L, 1);  /* remove _PRELOAD table */
 }
 

liolib.c

@@ -1,139 +1,120 @@
 /*
-** $Id: liolib.c,v 2.147 2015/07/15 14:40:28 roberto Exp roberto $
+** $Id: liolib.c,v 2.112 2013/04/11 18:34:06 roberto Exp $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
 
-#define liolib_c
-#define LUA_LIB
 
-#include "lprefix.h"
+/*
+** This definition must come before the inclusion of 'stdio.h'; it
+** should not affect non-POSIX systems
+*/
+#if !defined(_FILE_OFFSET_BITS)
+#define	_LARGEFILE_SOURCE	1
+#define _FILE_OFFSET_BITS	64
+#endif
 
 
-#include <ctype.h>
 #include <errno.h>
-#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define liolib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
 #include "lualib.h"
 
 
-
+#if !defined(lua_checkmode)
 
 /*
+** Check whether 'mode' matches '[rwa]%+?b?'.
 ** Change this macro to accept other modes for 'fopen' besides
 ** the standard ones.
 */
-#if !defined(l_checkmode)
-
-/* accepted extensions to 'mode' in 'fopen' */
-#if !defined(L_MODEEXT)
-#define L_MODEEXT	"b"
-#endif
-
-/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
-#define l_checkmode(mode) \
+#define lua_checkmode(mode) \
 	(*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&	\
-	(*mode != '+' || (++mode, 1)) &&  /* skip if char is '+' */	\
-	(strspn(mode, L_MODEEXT) == strlen(mode)))
+	(*mode != '+' || ++mode) &&  /* skip if char is '+' */	\
+	(*mode != 'b' || ++mode) &&  /* skip if char is 'b' */	\
+	(*mode == '\0'))
 
 #endif
 
 /*
 ** {======================================================
-** l_popen spawns a new process connected to the current
+** lua_popen spawns a new process connected to the current
 ** one through the file streams.
 ** =======================================================
 */
 
-#if !defined(l_popen)		/* { */
+#if !defined(lua_popen)	/* { */
 
-#if defined(LUA_USE_POSIX)	/* { */
+#if defined(LUA_USE_POPEN)	/* { */
 
-#define l_popen(L,c,m)		(fflush(NULL), popen(c,m))
-#define l_pclose(L,file)	(pclose(file))
+#define lua_popen(L,c,m)	((void)L, fflush(NULL), popen(c,m))
+#define lua_pclose(L,file)	((void)L, pclose(file))
 
-#elif defined(LUA_USE_WINDOWS)	/* }{ */
+#elif defined(LUA_WIN)		/* }{ */
+
+#define lua_popen(L,c,m)		((void)L, _popen(c,m))
+#define lua_pclose(L,file)		((void)L, _pclose(file))
 
-#define l_popen(L,c,m)		(_popen(c,m))
-#define l_pclose(L,file)	(_pclose(file))
 
 #else				/* }{ */
 
-/* ISO C definitions */
-#define l_popen(L,c,m)  \
-	  ((void)((void)c, m), \
-	  luaL_error(L, "'popen' not supported"), \
-	  (FILE*)0)
-#define l_pclose(L,file)		((void)L, (void)file, -1)
+#define lua_popen(L,c,m)		((void)((void)c, m),  \
+		luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
+#define lua_pclose(L,file)		((void)((void)L, file), -1)
+
 
 #endif				/* } */
 
-#endif				/* } */
+#endif			/* } */
 
 /* }====================================================== */
 
 
-#if !defined(l_getc)		/* { */
-
-#if defined(LUA_USE_POSIX)
-#define l_getc(f)		getc_unlocked(f)
-#define l_lockfile(f)		flockfile(f)
-#define l_unlockfile(f)		funlockfile(f)
-#else
-#define l_getc(f)		getc(f)
-#define l_lockfile(f)		((void)0)
-#define l_unlockfile(f)		((void)0)
-#endif
-
-#endif				/* } */
-
-
 /*
 ** {======================================================
-** l_fseek: configuration for longer offsets
+** lua_fseek: configuration for longer offsets
 ** =======================================================
 */
 
-#if !defined(l_fseek)		/* { */
+#if !defined(lua_fseek)	&& !defined(LUA_ANSI)	/* { */
 
 #if defined(LUA_USE_POSIX)	/* { */
 
-#include <sys/types.h>
-
 #define l_fseek(f,o,w)		fseeko(f,o,w)
 #define l_ftell(f)		ftello(f)
 #define l_seeknum		off_t
 
-#elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \
+#elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \
    && defined(_MSC_VER) && (_MSC_VER >= 1400)	/* }{ */
-
 /* Windows (but not DDK) and Visual C++ 2005 or higher */
+
 #define l_fseek(f,o,w)		_fseeki64(f,o,w)
 #define l_ftell(f)		_ftelli64(f)
 #define l_seeknum		__int64
 
-#else				/* }{ */
+#endif	/* } */
 
-/* ISO C definitions */
+#endif			/* } */
+
+
+#if !defined(l_fseek)		/* default definitions */
 #define l_fseek(f,o,w)		fseek(f,o,w)
 #define l_ftell(f)		ftell(f)
 #define l_seeknum		long
-
-#endif				/* } */
-
-#endif				/* } */
+#endif
 
 /* }====================================================== */
 
 
 #define IO_PREFIX	"_IO_"
-#define IOPREF_LEN	(sizeof(IO_PREFIX)/sizeof(char) - 1)
 #define IO_INPUT	(IO_PREFIX "input")
 #define IO_OUTPUT	(IO_PREFIX "output")
 
@@ -180,9 +161,9 @@ static FILE *tofile (lua_State *L) {
 
 
 /*
-** When creating file handles, always creates a 'closed' file handle
+** When creating file handles, always creates a `closed' file handle
 ** before opening the actual file; so, if there is a memory error, the
-** handle is in a consistent state.
+** file is not left opened.
 */
 static LStream *newprefile (lua_State *L) {
   LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
@@ -192,14 +173,9 @@ static LStream *newprefile (lua_State *L) {
 }
 
 
-/*
-** Calls the 'close' function from a file handle. The 'volatile' avoids
-** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
-** 32 bits).
-*/
 static int aux_close (lua_State *L) {
   LStream *p = tolstream(L);
-  volatile lua_CFunction cf = p->closef;
+  lua_CFunction cf = p->closef;
   p->closef = NULL;  /* mark stream as closed */
   return (*cf)(L);  /* close it */
 }
@@ -243,7 +219,7 @@ static void opencheck (lua_State *L, const char *fname, const char *mode) {
   LStream *p = newfile(L);
   p->f = fopen(fname, mode);
   if (p->f == NULL)
-    luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
+    luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno));
 }
 
 
@@ -252,7 +228,7 @@ static int io_open (lua_State *L) {
   const char *mode = luaL_optstring(L, 2, "r");
   LStream *p = newfile(L);
   const char *md = mode;  /* to traverse/check mode */
-  luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
+  luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode");
   p->f = fopen(filename, mode);
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
@@ -263,7 +239,7 @@ static int io_open (lua_State *L) {
 */
 static int io_pclose (lua_State *L) {
   LStream *p = tolstream(L);
-  return luaL_execresult(L, l_pclose(L, p->f));
+  return luaL_execresult(L, lua_pclose(L, p->f));
 }
 
 
@@ -271,7 +247,7 @@ 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);
-  p->f = l_popen(L, filename, mode);
+  p->f = lua_popen(L, filename, mode);
   p->closef = &io_pclose;
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
@@ -289,7 +265,7 @@ static FILE *getiofile (lua_State *L, const char *findex) {
   lua_getfield(L, LUA_REGISTRYINDEX, findex);
   p = (LStream *)lua_touserdata(L, -1);
   if (isclosed(p))
-    luaL_error(L, "standard %s file is closed", findex + IOPREF_LEN);
+    luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX));
   return p->f;
 }
 
@@ -324,18 +300,15 @@ static int io_output (lua_State *L) {
 static int io_readline (lua_State *L);
 
 
-/*
-** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit
-** in the limit for upvalues of a closure)
-*/
-#define MAXARGLINE	250
-
 static void aux_lines (lua_State *L, int toclose) {
+  int i;
   int n = lua_gettop(L) - 1;  /* number of arguments to read */
-  luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
+  /* ensure that arguments will fit here and into 'io_readline' stack */
+  luaL_argcheck(L, n <= LUA_MINSTACK - 3, LUA_MINSTACK - 3, "too many options");
+  lua_pushvalue(L, 1);  /* file handle */
   lua_pushinteger(L, n);  /* number of arguments to read */
   lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  lua_rotate(L, 2, 2);  /* move 'n' and 'toclose' to their positions */
+  for (i = 1; i <= n; i++) lua_pushvalue(L, i + 1);  /* copy arguments */
   lua_pushcclosure(L, io_readline, 3 + n);
 }
 
@@ -374,88 +347,13 @@ static int io_lines (lua_State *L) {
 */
 
 
-/* maximum length of a numeral */
-#define MAXRN		200
-
-/* auxiliary structure used by 'read_number' */
-typedef struct {
-  FILE *f;  /* file being read */
-  int c;  /* current character (look ahead) */
-  int n;  /* number of elements in buffer 'buff' */
-  char buff[MAXRN + 1];  /* +1 for ending '\0' */
-} RN;
-
-
-/*
-** Add current char to buffer (if not out of space) and read next one
-*/
-static int nextc (RN *rn) {
-  if (rn->n >= MAXRN) {  /* buffer overflow? */
-    rn->buff[0] = '\0';  /* invalidate result */
-    return 0;  /* fail */
-  }
-  else {
-    rn->buff[rn->n++] = rn->c;  /* save current char */
-    rn->c = l_getc(rn->f);  /* read next one */
+static int read_number (lua_State *L, FILE *f) {
+  lua_Number d;
+  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
+    lua_pushnumber(L, d);
     return 1;
   }
-}
-
-
-/*
-** Accept current char if it is in 'set' (of size 1 or 2)
-*/
-static int test2 (RN *rn, const char *set) {
-  if (rn->c == set[0] || (rn->c == set[1] && rn->c != '\0'))
-    return nextc(rn);
-  else return 0;
-}
-
-
-/*
-** Read a sequence of (hex)digits
-*/
-static int readdigits (RN *rn, int hex) {
-  int count = 0;
-  while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
-    count++;
-  return count;
-}
-
-
-/*
-** 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
-*/
-static int read_number (lua_State *L, FILE *f) {
-  RN rn;
-  int count = 0;
-  int hex = 0;
-  char decp[2];
-  rn.f = f; rn.n = 0;
-  decp[0] = lua_getlocaledecpoint();  /* get decimal point from locale */
-  decp[1] = '\0';
-  l_lockfile(rn.f);
-  do { rn.c = l_getc(rn.f); } while (isspace(rn.c));  /* skip spaces */
-  test2(&rn, "-+");  /* optional signal */
-  if (test2(&rn, "0")) {
-    if (test2(&rn, "xX")) hex = 1;  /* numeral is hexadecimal */
-    else count = 1;  /* count initial '0' as a valid digit */
-  }
-  count += readdigits(&rn, hex);  /* integral part */
-  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 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 (lua_stringtonumber(L, rn.buff))  /* is this a valid number? */
-    return 1;  /* ok */
-  else {  /* invalid format */
+  else {
    lua_pushnil(L);  /* "result" to be removed */
    return 0;  /* read fails */
   }
@@ -464,42 +362,48 @@ static int read_number (lua_State *L, FILE *f) {
 
 static int test_eof (lua_State *L, FILE *f) {
   int c = getc(f);
-  ungetc(c, f);  /* no-op when c == EOF */
-  lua_pushliteral(L, "");
+  ungetc(c, f);
+  lua_pushlstring(L, NULL, 0);
   return (c != EOF);
 }
 
 
 static int read_line (lua_State *L, FILE *f, int chop) {
   luaL_Buffer b;
-  int c = '\0';
   luaL_buffinit(L, &b);
-  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;
-    l_unlockfile(f);
-    luaL_addsize(&b, i);
+  for (;;) {
+    size_t l;
+    char *p = luaL_prepbuffer(&b);
+    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
+      luaL_pushresult(&b);  /* close buffer */
+      return (lua_rawlen(L, -1) > 0);  /* check whether read something */
+    }
+    l = strlen(p);
+    if (l == 0 || p[l-1] != '\n')
+      luaL_addsize(&b, l);
+    else {
+      luaL_addsize(&b, l - chop);  /* chop 'eol' if needed */
+      luaL_pushresult(&b);  /* close buffer */
+      return 1;  /* read at least an `eol' */
+    }
   }
-  if (!chop && c == '\n')  /* want a newline and have one? */
-    luaL_addchar(&b, c);  /* add ending newline to result */
-  luaL_pushresult(&b);  /* close buffer */
-  /* return ok if read something (either a newline or something else) */
-  return (c == '\n' || lua_rawlen(L, -1) > 0);
 }
 
 
+#define MAX_SIZE_T	(~(size_t)0)
+
 static void read_all (lua_State *L, FILE *f) {
-  size_t nr;
+  size_t rlen = LUAL_BUFFERSIZE;  /* how much to read in each cycle */
   luaL_Buffer b;
   luaL_buffinit(L, &b);
-  do {  /* read file in chunks of LUAL_BUFFERSIZE bytes */
-    char *p = luaL_prepbuffer(&b);
-    nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
+  for (;;) {
+    char *p = luaL_prepbuffsize(&b, rlen);
+    size_t nr = fread(p, sizeof(char), rlen, f);
     luaL_addsize(&b, nr);
-  } while (nr == LUAL_BUFFERSIZE);
+    if (nr < rlen) break;  /* eof? */
+    else if (rlen <= (MAX_SIZE_T / 4))  /* avoid buffers too large */
+      rlen *= 2;  /* double buffer size at each iteration */
+  }
   luaL_pushresult(&b);  /* close buffer */
 }
 
@@ -531,13 +435,13 @@ static int g_read (lua_State *L, FILE *f, int first) {
     success = 1;
     for (n = first; nargs-- && success; n++) {
       if (lua_type(L, n) == LUA_TNUMBER) {
-        size_t l = (size_t)luaL_checkinteger(L, n);
+        size_t l = (size_t)lua_tointeger(L, n);
         success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
       }
       else {
-        const char *p = luaL_checkstring(L, n);
-        if (*p == '*') p++;  /* skip optional '*' (for compatibility) */
-        switch (*p) {
+        const char *p = lua_tostring(L, n);
+        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
+        switch (p[1]) {
           case 'n':  /* number */
             success = read_number(L, f);
             break;
@@ -584,12 +488,11 @@ static int io_readline (lua_State *L) {
   if (isclosed(p))  /* file is already closed? */
     return luaL_error(L, "file is already closed");
   lua_settop(L , 1);
-  luaL_checkstack(L, n, "too many arguments");
   for (i = 1; i <= n; i++)  /* push arguments to 'g_read' */
     lua_pushvalue(L, lua_upvalueindex(3 + i));
   n = g_read(L, p->f, 2);  /* 'n' is number of results */
   lua_assert(n > 0);  /* should return at least a nil */
-  if (lua_toboolean(L, -n))  /* read at least one value? */
+  if (!lua_isnil(L, -n))  /* read at least one value? */
     return n;  /* return them */
   else {  /* first result is nil: EOF or error */
     if (n > 1) {  /* is there error information? */
@@ -614,10 +517,8 @@ static int g_write (lua_State *L, FILE *f, int arg) {
   for (; nargs--; arg++) {
     if (lua_type(L, arg) == LUA_TNUMBER) {
       /* optimization: could be done exactly as for strings */
-      int len = lua_isinteger(L, arg)
-                ? fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg))
-                : fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg));
-      status = status && (len > 0);
+      status = status &&
+          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
     }
     else {
       size_t l;
@@ -647,15 +548,15 @@ static int f_seek (lua_State *L) {
   static const char *const modenames[] = {"set", "cur", "end", NULL};
   FILE *f = tofile(L);
   int op = luaL_checkoption(L, 2, "cur", modenames);
-  lua_Integer p3 = luaL_optinteger(L, 3, 0);
+  lua_Number p3 = luaL_optnumber(L, 3, 0);
   l_seeknum offset = (l_seeknum)p3;
-  luaL_argcheck(L, (lua_Integer)offset == p3, 3,
+  luaL_argcheck(L, (lua_Number)offset == p3, 3,
                   "not an integer in proper range");
   op = l_fseek(f, offset, mode[op]);
   if (op)
     return luaL_fileresult(L, 0, NULL);  /* error */
   else {
-    lua_pushinteger(L, (lua_Integer)l_ftell(f));
+    lua_pushnumber(L, (lua_Number)l_ftell(f));
     return 1;
   }
 }
@@ -667,7 +568,7 @@ static int f_setvbuf (lua_State *L) {
   FILE *f = tofile(L);
   int op = luaL_checkoption(L, 2, NULL, modenames);
   lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
-  int res = setvbuf(f, NULL, mode[op], (size_t)sz);
+  int res = setvbuf(f, NULL, mode[op], sz);
   return luaL_fileresult(L, res == 0, NULL);
 }
 

llex.c

@@ -1,24 +1,20 @@
 /*
-** $Id: llex.c,v 2.94 2015/10/28 18:51:47 roberto Exp roberto $
+** $Id: llex.c,v 2.63.1.2 2013/08/30 15:49:41 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
 
-#define llex_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <locale.h>
 #include <string.h>
 
+#define llex_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lctype.h"
-#include "ldebug.h"
 #include "ldo.h"
-#include "lgc.h"
 #include "llex.h"
 #include "lobject.h"
 #include "lparser.h"
@@ -42,9 +38,8 @@ static const char *const luaX_tokens [] = {
     "end", "false", "for", "function", "goto", "if",
     "in", "local", "nil", "not", "or", "repeat",
     "return", "then", "true", "until", "while",
-    "//", "..", "...", "==", ">=", "<=", "~=",
-    "<<", ">>", "::", "<eof>",
-    "<number>", "<integer>", "<name>", "<string>"
+    "..", "...", "==", ">=", "<=", "~=", "::", "<eof>",
+    "<number>", "<name>", "<string>"
 };
 
 
@@ -58,7 +53,7 @@ static void save (LexState *ls, int c) {
   Mbuffer *b = ls->buff;
   if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
     size_t newsize;
-    if (luaZ_sizebuffer(b) >= MAX_SIZE/2)
+    if (luaZ_sizebuffer(b) >= MAX_SIZET/2)
       lexerror(ls, "lexical element too long", 0);
     newsize = luaZ_sizebuffer(b) * 2;
     luaZ_resizebuffer(ls->L, b, newsize);
@@ -69,25 +64,24 @@ static void save (LexState *ls, int c) {
 
 void luaX_init (lua_State *L) {
   int i;
-  TString *e = luaS_newliteral(L, LUA_ENV);  /* create env name */
-  luaC_fix(L, obj2gco(e));  /* never collect this name */
   for (i=0; i<NUM_RESERVED; i++) {
     TString *ts = luaS_new(L, luaX_tokens[i]);
-    luaC_fix(L, obj2gco(ts));  /* reserved words are never collected */
-    ts->extra = cast_byte(i+1);  /* reserved word */
+    luaS_fix(ts);  /* reserved words are never collected */
+    ts->tsv.extra = cast_byte(i+1);  /* reserved word */
   }
 }
 
 
 const char *luaX_token2str (LexState *ls, int token) {
   if (token < FIRST_RESERVED) {  /* single-byte symbols? */
-    lua_assert(token == cast_uchar(token));
-    return luaO_pushfstring(ls->L, "'%c'", token);
+    lua_assert(token == cast(unsigned char, token));
+    return (lisprint(token)) ? luaO_pushfstring(ls->L, LUA_QL("%c"), token) :
+                              luaO_pushfstring(ls->L, "char(%d)", token);
   }
   else {
     const char *s = luaX_tokens[token - FIRST_RESERVED];
     if (token < TK_EOS)  /* fixed format (symbols and reserved words)? */
-      return luaO_pushfstring(ls->L, "'%s'", s);
+      return luaO_pushfstring(ls->L, LUA_QS, s);
     else  /* names, strings, and numerals */
       return s;
   }
@@ -96,10 +90,11 @@ const char *luaX_token2str (LexState *ls, int token) {
 
 static const char *txtToken (LexState *ls, int token) {
   switch (token) {
-    case TK_NAME: case TK_STRING:
-    case TK_FLT: case TK_INT:
+    case TK_NAME:
+    case TK_STRING:
+    case TK_NUMBER:
       save(ls, '\0');
-      return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff));
+      return luaO_pushfstring(ls->L, LUA_QS, luaZ_buffer(ls->buff));
     default:
       return luaX_token2str(ls, token);
   }
@@ -107,7 +102,9 @@ static const char *txtToken (LexState *ls, int token) {
 
 
 static l_noret lexerror (LexState *ls, const char *msg, int token) {
-  msg = luaG_addinfo(ls->L, msg, ls->source, ls->linenumber);
+  char buff[LUA_IDSIZE];
+  luaO_chunkid(buff, getstr(ls->source), LUA_IDSIZE);
+  msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
   if (token)
     luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token));
   luaD_throw(ls->L, LUA_ERRSYNTAX);
@@ -120,24 +117,24 @@ 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)
+** creates a new string and anchors it in function's table so that
+** it will not be collected until the end of the function's compilation
+** (by that time it should be anchored in function's prototype)
 */
 TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   lua_State *L = ls->L;
-  TValue *o;  /* entry for 'str' */
+  TValue *o;  /* entry for `str' */
   TString *ts = luaS_newlstr(L, str, l);  /* create new string */
   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? */
+  o = luaH_set(L, ls->fs->h, L->top - 1);
+  if (ttisnil(o)) {  /* not in use yet? (see 'addK') */
     /* 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);
   }
   else {  /* string already present */
-    ts = tsvalue(keyfromval(o));  /* re-use value previously stored */
+    ts = rawtsvalue(keyfromval(o));  /* re-use value previously stored */
   }
   L->top--;  /* remove string from stack */
   return ts;
@@ -151,9 +148,9 @@ TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
 static void inclinenumber (LexState *ls) {
   int old = ls->current;
   lua_assert(currIsNewline(ls));
-  next(ls);  /* skip '\n' or '\r' */
+  next(ls);  /* skip `\n' or `\r' */
   if (currIsNewline(ls) && ls->current != old)
-    next(ls);  /* skip '\n\r' or '\r\n' */
+    next(ls);  /* skip `\n\r' or `\r\n' */
   if (++ls->linenumber >= MAX_INT)
     lexerror(ls, "chunk has too many lines", 0);
 }
@@ -161,7 +158,6 @@ static void inclinenumber (LexState *ls) {
 
 void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
                     int firstchar) {
-  ls->t.token = 0;
   ls->decpoint = '.';
   ls->L = L;
   ls->current = firstchar;
@@ -171,7 +167,8 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
   ls->linenumber = 1;
   ls->lastline = 1;
   ls->source = source;
-  ls->envn = luaS_newliteral(L, LUA_ENV);  /* get env name */
+  ls->envn = luaS_new(L, LUA_ENV);  /* create env name */
+  luaS_fix(ls->envn);  /* never collect this name */
   luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
 }
 
@@ -184,26 +181,12 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
 */
 
 
-static int check_next1 (LexState *ls, int c) {
-  if (ls->current == c) {
-    next(ls);
-    return 1;
-  }
-  else return 0;
-}
 
-
-/*
-** Check whether current char is in set 'set' (with two chars) and
-** saves it
-*/
-static int check_next2 (LexState *ls, const char *set) {
-  lua_assert(set[2] == '\0');
-  if (ls->current == set[0] || ls->current == set[1]) {
-    save_and_next(ls);
-    return 1;
-  }
-  else return 0;
+static int check_next (LexState *ls, const char *set) {
+  if (ls->current == '\0' || !strchr(set, ls->current))
+    return 0;
+  save_and_next(ls);
+  return 1;
 }
 
 
@@ -211,73 +194,65 @@ static int check_next2 (LexState *ls, const char *set) {
 ** change all characters 'from' in buffer to 'to'
 */
 static void buffreplace (LexState *ls, char from, char to) {
-  if (from != to) {
-    size_t n = luaZ_bufflen(ls->buff);
-    char *p = luaZ_buffer(ls->buff);
-    while (n--)
-      if (p[n] == from) p[n] = to;
-  }
+  size_t n = luaZ_bufflen(ls->buff);
+  char *p = luaZ_buffer(ls->buff);
+  while (n--)
+    if (p[n] == from) p[n] = to;
 }
 
 
+#if !defined(getlocaledecpoint)
+#define getlocaledecpoint()	(localeconv()->decimal_point[0])
+#endif
+
+
+#define buff2d(b,e)	luaO_str2d(luaZ_buffer(b), luaZ_bufflen(b) - 1, e)
+
 /*
 ** in case of format error, try to change decimal point separator to
 ** the one defined in the current locale and check again
 */
-static void trydecpoint (LexState *ls, TValue *o) {
+static void trydecpoint (LexState *ls, SemInfo *seminfo) {
   char old = ls->decpoint;
-  ls->decpoint = lua_getlocaledecpoint();
+  ls->decpoint = getlocaledecpoint();
   buffreplace(ls, old, ls->decpoint);  /* try new decimal separator */
-  if (luaO_str2num(luaZ_buffer(ls->buff), o) == 0) {
+  if (!buff2d(ls->buff, &seminfo->r)) {
     /* format error with correct decimal point: no more options */
     buffreplace(ls, ls->decpoint, '.');  /* undo change (for error message) */
-    lexerror(ls, "malformed number", TK_FLT);
+    lexerror(ls, "malformed number", TK_NUMBER);
   }
 }
 
 
 /* LUA_NUMBER */
 /*
-** this function is quite liberal in what it accepts, as 'luaO_str2num'
+** this function is quite liberal in what it accepts, as 'luaO_str2d'
 ** will reject ill-formed numerals.
 */
-static int read_numeral (LexState *ls, SemInfo *seminfo) {
-  TValue obj;
+static void read_numeral (LexState *ls, SemInfo *seminfo) {
   const char *expo = "Ee";
   int first = ls->current;
   lua_assert(lisdigit(ls->current));
   save_and_next(ls);
-  if (first == '0' && check_next2(ls, "xX"))  /* hexadecimal? */
+  if (first == '0' && check_next(ls, "Xx"))  /* hexadecimal? */
     expo = "Pp";
   for (;;) {
-    if (check_next2(ls, expo))  /* exponent part? */
-      check_next2(ls, "-+");  /* optional exponent sign */
-    if (lisxdigit(ls->current))
+    if (check_next(ls, expo))  /* exponent part? */
+      check_next(ls, "+-");  /* optional exponent sign */
+    if (lisxdigit(ls->current) || ls->current == '.')
       save_and_next(ls);
-    else if (ls->current == '.')
-      save_and_next(ls);
-    else break;
+    else  break;
   }
   save(ls, '\0');
   buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
-  if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0)  /* format error? */
-    trydecpoint(ls, &obj); /* try to update decimal point separator */
-  if (ttisinteger(&obj)) {
-    seminfo->i = ivalue(&obj);
-    return TK_INT;
-  }
-  else {
-    lua_assert(ttisfloat(&obj));
-    seminfo->r = fltvalue(&obj);
-    return TK_FLT;
-  }
+  if (!buff2d(ls->buff, &seminfo->r))  /* format error? */
+    trydecpoint(ls, seminfo); /* try to update decimal point separator */
 }
 
 
 /*
-** skip a sequence '[=*[' or ']=*]'; if sequence is well formed, return
-** its number of '='s; otherwise, return a negative number (-1 iff there
-** are no '='s after initial bracket)
+** skip a sequence '[=*[' or ']=*]' and return its number of '='s or
+** -1 if sequence is malformed
 */
 static int skip_sep (LexState *ls) {
   int count = 0;
@@ -293,22 +268,18 @@ static int skip_sep (LexState *ls) {
 
 
 static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
-  int line = ls->linenumber;  /* initial line (for error message) */
-  save_and_next(ls);  /* skip 2nd '[' */
+  save_and_next(ls);  /* skip 2nd `[' */
   if (currIsNewline(ls))  /* string starts with a newline? */
     inclinenumber(ls);  /* skip it */
   for (;;) {
     switch (ls->current) {
-      case EOZ: {  /* error */
-        const char *what = (seminfo ? "string" : "comment");
-        const char *msg = luaO_pushfstring(ls->L,
-                     "unfinished long %s (starting at line %d)", what, line);
-        lexerror(ls, msg, TK_EOS);
+      case EOZ:
+        lexerror(ls, (seminfo) ? "unfinished long string" :
+                                 "unfinished long comment", TK_EOS);
         break;  /* to avoid warnings */
-      }
       case ']': {
         if (skip_sep(ls) == sep) {
-          save_and_next(ls);  /* skip 2nd ']' */
+          save_and_next(ls);  /* skip 2nd `]' */
           goto endloop;
         }
         break;
@@ -331,65 +302,40 @@ static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
 }
 
 
-static void esccheck (LexState *ls, int c, const char *msg) {
-  if (!c) {
-    if (ls->current != EOZ)
-      save_and_next(ls);  /* add current to buffer for error message */
-    lexerror(ls, msg, TK_STRING);
-  }
-}
-
-
-static int gethexa (LexState *ls) {
-  save_and_next(ls);
-  esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected");
-  return luaO_hexavalue(ls->current);
+static void escerror (LexState *ls, int *c, int n, const char *msg) {
+  int i;
+  luaZ_resetbuffer(ls->buff);  /* prepare error message */
+  save(ls, '\\');
+  for (i = 0; i < n && c[i] != EOZ; i++)
+    save(ls, c[i]);
+  lexerror(ls, msg, TK_STRING);
 }
 
 
 static int readhexaesc (LexState *ls) {
-  int r = gethexa(ls);
-  r = (r << 4) + gethexa(ls);
-  luaZ_buffremove(ls->buff, 2);  /* remove saved chars from buffer */
-  return r;
-}
-
-
-static unsigned long readutf8esc (LexState *ls) {
-  unsigned long r;
-  int i = 4;  /* chars to be removed: '\', 'u', '{', and first digit */
-  save_and_next(ls);  /* skip 'u' */
-  esccheck(ls, ls->current == '{', "missing '{'");
-  r = gethexa(ls);  /* must have at least one digit */
-  while ((save_and_next(ls), lisxdigit(ls->current))) {
-    i++;
-    r = (r << 4) + luaO_hexavalue(ls->current);
-    esccheck(ls, r <= 0x10FFFF, "UTF-8 value too large");
+  int c[3], i;  /* keep input for error message */
+  int r = 0;  /* result accumulator */
+  c[0] = 'x';  /* for error message */
+  for (i = 1; i < 3; i++) {  /* read two hexadecimal digits */
+    c[i] = next(ls);
+    if (!lisxdigit(c[i]))
+      escerror(ls, c, i + 1, "hexadecimal digit expected");
+    r = (r << 4) + luaO_hexavalue(c[i]);
   }
-  esccheck(ls, ls->current == '}', "missing '}'");
-  next(ls);  /* skip '}' */
-  luaZ_buffremove(ls->buff, i);  /* remove saved chars from buffer */
   return r;
 }
 
 
-static void utf8esc (LexState *ls) {
-  char buff[UTF8BUFFSZ];
-  int n = luaO_utf8esc(buff, readutf8esc(ls));
-  for (; n > 0; n--)  /* add 'buff' to string */
-    save(ls, buff[UTF8BUFFSZ - n]);
-}
-
-
 static int readdecesc (LexState *ls) {
-  int i;
+  int c[3], i;
   int r = 0;  /* result accumulator */
   for (i = 0; i < 3 && lisdigit(ls->current); i++) {  /* read up to 3 digits */
-    r = 10*r + ls->current - '0';
-    save_and_next(ls);
+    c[i] = ls->current;
+    r = 10*r + c[i] - '0';
+    next(ls);
   }
-  esccheck(ls, r <= UCHAR_MAX, "decimal escape too large");
-  luaZ_buffremove(ls->buff, i);  /* remove read digits from buffer */
+  if (r > UCHAR_MAX)
+    escerror(ls, c, i, "decimal escape too large");
   return r;
 }
 
@@ -407,7 +353,7 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
         break;  /* to avoid warnings */
       case '\\': {  /* escape sequences */
         int c;  /* final character to be saved */
-        save_and_next(ls);  /* keep '\\' for error messages */
+        next(ls);  /* do not save the `\' */
         switch (ls->current) {
           case 'a': c = '\a'; goto read_save;
           case 'b': c = '\b'; goto read_save;
@@ -417,14 +363,12 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
           case 't': c = '\t'; goto read_save;
           case 'v': c = '\v'; goto read_save;
           case 'x': c = readhexaesc(ls); goto read_save;
-          case 'u': utf8esc(ls);  goto no_save;
           case '\n': case '\r':
             inclinenumber(ls); c = '\n'; goto only_save;
           case '\\': case '\"': case '\'':
             c = ls->current; goto read_save;
           case EOZ: goto no_save;  /* will raise an error next loop */
           case 'z': {  /* zap following span of spaces */
-            luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
             next(ls);  /* skip the 'z' */
             while (lisspace(ls->current)) {
               if (currIsNewline(ls)) inclinenumber(ls);
@@ -433,18 +377,15 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
             goto no_save;
           }
           default: {
-            esccheck(ls, lisdigit(ls->current), "invalid escape sequence");
-            c = readdecesc(ls);  /* digital escape '\ddd' */
+            if (!lisdigit(ls->current))
+              escerror(ls, &ls->current, 1, "invalid escape sequence");
+            /* digital escape \ddd */
+            c = readdecesc(ls);
             goto only_save;
           }
         }
-       read_save:
-         next(ls);
-         /* go through */
-       only_save:
-         luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
-         save(ls, c);
-         /* go through */
+       read_save: next(ls);  /* read next character */
+       only_save: save(ls, c);  /* save 'c' */
        no_save: break;
       }
       default:
@@ -476,7 +417,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
         next(ls);
         if (ls->current == '[') {  /* long comment? */
           int sep = skip_sep(ls);
-          luaZ_resetbuffer(ls->buff);  /* 'skip_sep' may dirty the buffer */
+          luaZ_resetbuffer(ls->buff);  /* `skip_sep' may dirty the buffer */
           if (sep >= 0) {
             read_long_string(ls, NULL, sep);  /* skip long comment */
             luaZ_resetbuffer(ls->buff);  /* previous call may dirty the buff. */
@@ -494,41 +435,33 @@ static int llex (LexState *ls, SemInfo *seminfo) {
           read_long_string(ls, seminfo, sep);
           return TK_STRING;
         }
-        else if (sep != -1)  /* '[=...' missing second bracket */
-          lexerror(ls, "invalid long string delimiter", TK_STRING);
-        return '[';
+        else if (sep == -1) return '[';
+        else lexerror(ls, "invalid long string delimiter", TK_STRING);
       }
       case '=': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_EQ;
-        else return '=';
+        if (ls->current != '=') return '=';
+        else { next(ls); return TK_EQ; }
       }
       case '<': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_LE;
-        else if (check_next1(ls, '<')) return TK_SHL;
-        else return '<';
+        if (ls->current != '=') return '<';
+        else { next(ls); return TK_LE; }
       }
       case '>': {
         next(ls);
-        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;
-        else return '/';
+        if (ls->current != '=') return '>';
+        else { next(ls); return TK_GE; }
       }
       case '~': {
         next(ls);
-        if (check_next1(ls, '=')) return TK_NE;
-        else return '~';
+        if (ls->current != '=') return '~';
+        else { next(ls); return TK_NE; }
       }
       case ':': {
         next(ls);
-        if (check_next1(ls, ':')) return TK_DBCOLON;
-        else return ':';
+        if (ls->current != ':') return ':';
+        else { next(ls); return TK_DBCOLON; }
       }
       case '"': case '\'': {  /* short literal strings */
         read_string(ls, ls->current, seminfo);
@@ -536,17 +469,18 @@ static int llex (LexState *ls, SemInfo *seminfo) {
       }
       case '.': {  /* '.', '..', '...', or number */
         save_and_next(ls);
-        if (check_next1(ls, '.')) {
-          if (check_next1(ls, '.'))
+        if (check_next(ls, ".")) {
+          if (check_next(ls, "."))
             return TK_DOTS;   /* '...' */
           else return TK_CONCAT;   /* '..' */
         }
         else if (!lisdigit(ls->current)) return '.';
-        else return read_numeral(ls, seminfo);
+        /* else go through */
       }
       case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9': {
-        return read_numeral(ls, seminfo);
+        read_numeral(ls, seminfo);
+        return TK_NUMBER;
       }
       case EOZ: {
         return TK_EOS;
@@ -561,7 +495,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
                                   luaZ_bufflen(ls->buff));
           seminfo->ts = ts;
           if (isreserved(ts))  /* reserved word? */
-            return ts->extra - 1 + FIRST_RESERVED;
+            return ts->tsv.extra - 1 + FIRST_RESERVED;
           else {
             return TK_NAME;
           }

llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h,v 1.77 2014/10/25 11:50:46 roberto Exp roberto $
+** $Id: llex.h,v 1.72 2011/11/30 12:43:51 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -14,10 +14,6 @@
 #define FIRST_RESERVED	257
 
 
-#if !defined(LUA_ENV)
-#define LUA_ENV		"_ENV"
-#endif
-
 
 /*
 * WARNING: if you change the order of this enumeration,
@@ -30,10 +26,8 @@ enum RESERVED {
   TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
   TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
   /* other terminal symbols */
-  TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
-  TK_SHL, TK_SHR,
-  TK_DBCOLON, TK_EOS,
-  TK_FLT, TK_INT, TK_NAME, TK_STRING
+  TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
+  TK_NUMBER, TK_NAME, TK_STRING
 };
 
 /* number of reserved words */
@@ -42,7 +36,6 @@ enum RESERVED {
 
 typedef union {
   lua_Number r;
-  lua_Integer i;
   TString *ts;
 } SemInfo;  /* semantics information */
 
@@ -58,14 +51,13 @@ typedef struct Token {
 typedef struct LexState {
   int current;  /* current character (charint) */
   int linenumber;  /* input line counter */
-  int lastline;  /* line of last token 'consumed' */
+  int lastline;  /* line of last token `consumed' */
   Token t;  /* current token */
   Token lookahead;  /* look ahead token */
   struct FuncState *fs;  /* current function (parser) */
   struct lua_State *L;
   ZIO *z;  /* input stream */
   Mbuffer *buff;  /* buffer for tokens */
-  Table *h;  /* to avoid collection/reuse strings */
   struct Dyndata *dyd;  /* dynamic structures used by the parser */
   TString *source;  /* current source name */
   TString *envn;  /* environment variable name */

llimits.h

@@ -1,6 +1,6 @@
 /*
-** $Id: llimits.h,v 1.140 2015/10/21 18:40:47 roberto Exp roberto $
-** Limits, basic types, and some other 'installation-dependent' definitions
+** $Id: llimits.h,v 1.103 2013/02/20 14:08:56 roberto Exp $
+** Limits, basic types, and some other `installation-dependent' definitions
 ** See Copyright Notice in lua.h
 */
 
@@ -14,77 +14,54 @@
 
 #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
-** 'ptrdiff_t' should work, but we use 'long' for 16-bit machines.
-*/
-#if defined(LUAI_MEM)		/* { external definitions? */
+
+typedef unsigned LUA_INT32 lu_int32;
+
 typedef LUAI_UMEM lu_mem;
+
 typedef LUAI_MEM l_mem;
-#elif LUAI_BITSINT >= 32	/* }{ */
-typedef size_t lu_mem;
-typedef ptrdiff_t l_mem;
-#else  /* 16-bit ints */	/* }{ */
-typedef unsigned long lu_mem;
-typedef long l_mem;
-#endif				/* } */
 
 
-/* chars used as small naturals (so that 'char' is reserved for characters) */
+
+/* chars used as small naturals (so that `char' is reserved for characters) */
 typedef unsigned char lu_byte;
 
 
-/* maximum value for size_t */
-#define MAX_SIZET	((size_t)(~(size_t)0))
+#define MAX_SIZET	((size_t)(~(size_t)0)-2)
 
-/* 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))
+#define MAX_LUMEM	((lu_mem)(~(lu_mem)0)-2)
+
+#define MAX_LMEM	((l_mem) ((MAX_LUMEM >> 1) - 2))
 
 
-#define MAX_LUMEM	((lu_mem)(~(lu_mem)0))
-
-#define MAX_LMEM	((l_mem)(MAX_LUMEM >> 1))
-
-
-#define MAX_INT		INT_MAX  /* maximum value of an int */
-
+#define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
 
 /*
-** conversion of pointer to unsigned integer:
+** conversion of pointer to integer
 ** this is for hashing only; there is no problem if the integer
 ** cannot hold the whole pointer value
 */
-#define point2uint(p)	((unsigned int)((size_t)(p) & UINT_MAX))
+#define IntPoint(p)  ((unsigned int)(lu_mem)(p))
 
 
 
 /* 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;
+#if !defined(LUAI_USER_ALIGNMENT_T)
+#define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
 #endif
 
+typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
 
 
-/* types of 'usual argument conversions' for lua_Number and lua_Integer */
+/* result of a `usual argument conversion' over lua_Number */
 typedef LUAI_UACNUMBER l_uacNumber;
-typedef LUAI_UACINT l_uacInt;
 
 
 /* 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 */
-#define lua_longassert(c)	((c) ? (void)0 : lua_assert(0))
+#define lua_longassert(c)	{ if (!(c)) lua_assert(0); }
 #else
 #define lua_assert(c)		((void)0)
 #define check_exp(c,e)		(e)
@@ -95,49 +72,38 @@ typedef LUAI_UACINT l_uacInt;
 ** assertion for checking API calls
 */
 #if !defined(luai_apicheck)
-#define luai_apicheck(l,e)	lua_assert(e)
+
+#if defined(LUA_USE_APICHECK)
+#include <assert.h>
+#define luai_apicheck(L,e)	assert(e)
+#else
+#define luai_apicheck(L,e)	lua_assert(e)
+#endif
+
 #endif
 
 #define api_check(l,e,msg)	luai_apicheck(l,(e) && msg)
 
 
-/* macro to avoid warnings about unused variables */
 #if !defined(UNUSED)
-#define UNUSED(x)	((void)(x))
+#define UNUSED(x)	((void)(x))	/* to avoid warnings */
 #endif
 
 
-/* type casts (a macro highlights casts in the code) */
 #define cast(t, exp)	((t)(exp))
 
-#define cast_void(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_uchar(i)	cast(unsigned char, (i))
 
 
-/* cast a signed lua_Integer to lua_Unsigned */
-#if !defined(l_castS2U)
-#define l_castS2U(i)	((lua_Unsigned)(i))
-#endif
-
-/*
-** cast a lua_Unsigned to a signed lua_Integer; this cast is
-** not strict ISO C, but two-complement architectures should
-** work fine.
-*/
-#if !defined(l_castU2S)
-#define l_castU2S(i)	((lua_Integer)(i))
-#endif
-
-
 /*
 ** non-return type
 */
 #if defined(__GNUC__)
 #define l_noret		void __attribute__((noreturn))
-#elif defined(_MSC_VER) && _MSC_VER >= 1200
+#elif defined(_MSC_VER)
 #define l_noret		void __declspec(noreturn)
 #else
 #define l_noret		void
@@ -153,50 +119,29 @@ typedef LUAI_UACINT l_uacInt;
 #define LUAI_MAXCCALLS		200
 #endif
 
+/*
+** maximum number of upvalues in a closure (both C and Lua). (Value
+** must fit in an unsigned char.)
+*/
+#define MAXUPVAL	UCHAR_MAX
 
 
 /*
-** type for virtual-machine instructions;
+** type for virtual-machine instructions
 ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
 */
-#if LUAI_BITSINT >= 32
-typedef unsigned int Instruction;
-#else
-typedef unsigned long Instruction;
-#endif
+typedef lu_int32 Instruction;
 
 
 
-/*
-** Maximum length for short strings, that is, strings that are
-** internalized. (Cannot be smaller than reserved words or tags for
-** metamethods, as these strings must be internalized;
-** #("function") = 8, #("__newindex") = 10.)
-*/
-#if !defined(LUAI_MAXSHORTLEN)
-#define LUAI_MAXSHORTLEN	40
-#endif
+/* maximum stack for a Lua function */
+#define MAXSTACK	250
 
 
-/*
-** Initial size for the string table (must be power of 2).
-** The Lua core alone registers ~50 strings (reserved words +
-** metaevent keys + a few others). Libraries would typically add
-** a few dozens more.
-*/
+
+/* minimum size for the string table (must be power of 2) */
 #if !defined(MINSTRTABSIZE)
-#define MINSTRTABSIZE	128
-#endif
-
-
-/*
-** Size of cache for strings in the API. 'N' is the number of
-** sets (better be a prime) and "M" is the size of each set (M == 1
-** makes a direct cache.)
-*/
-#if !defined(STRCACHE_N)
-#define STRCACHE_N		53
-#define STRCACHE_M		2
+#define MINSTRTABSIZE	32
 #endif
 
 
@@ -206,21 +151,13 @@ typedef unsigned long Instruction;
 #endif
 
 
-/*
-** macros that are executed whenever program enters the Lua core
-** ('lua_lock') and leaves the core ('lua_unlock')
-*/
 #if !defined(lua_lock)
-#define lua_lock(L)	((void) 0)
-#define lua_unlock(L)	((void) 0)
+#define lua_lock(L)     ((void) 0)
+#define lua_unlock(L)   ((void) 0)
 #endif
 
-/*
-** macro executed during Lua functions at points where the
-** function can yield.
-*/
 #if !defined(luai_threadyield)
-#define luai_threadyield(L)	{lua_unlock(L); lua_lock(L);}
+#define luai_threadyield(L)     {lua_unlock(L); lua_lock(L);}
 #endif
 
 
@@ -246,78 +183,127 @@ typedef unsigned long Instruction;
 #endif
 
 #if !defined(luai_userstateresume)
-#define luai_userstateresume(L,n)	((void)L)
+#define luai_userstateresume(L,n)       ((void)L)
 #endif
 
 #if !defined(luai_userstateyield)
-#define luai_userstateyield(L,n)	((void)L)
-#endif
-
-
-
-/*
-** The luai_num* macros define the primitive operations over numbers.
-*/
-
-/* floor division (defined as 'floor(a/b)') */
-#if !defined(luai_numidiv)
-#define luai_numidiv(L,a,b)     ((void)L, l_floor(luai_numdiv(L,a,b)))
-#endif
-
-/* float division */
-#if !defined(luai_numdiv)
-#define luai_numdiv(L,a,b)      ((a)/(b))
+#define luai_userstateyield(L,n)        ((void)L)
 #endif
 
 /*
-** 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.
+** lua_number2int is a macro to convert lua_Number to int.
+** lua_number2integer is a macro to convert lua_Number to lua_Integer.
+** lua_number2unsigned is a macro to convert a lua_Number to a lua_Unsigned.
+** lua_unsigned2number is a macro to convert a lua_Unsigned to a lua_Number.
+** luai_hashnum is a macro to hash a lua_Number value into an integer.
+** The hash must be deterministic and give reasonable values for
+** both small and large values (outside the range of integers).
 */
-#if !defined(luai_nummod)
-#define luai_nummod(L,a,b,m)  \
-  { (m) = l_mathop(fmod)(a,b); if ((m)*(b) < 0) (m) += (b); }
+
+#if defined(MS_ASMTRICK) || defined(LUA_MSASMTRICK)	/* { */
+/* trick with Microsoft assembler for X86 */
+
+#define lua_number2int(i,n)  __asm {__asm fld n   __asm fistp i}
+#define lua_number2integer(i,n)		lua_number2int(i, n)
+#define lua_number2unsigned(i,n)  \
+  {__int64 l; __asm {__asm fld n   __asm fistp l} i = (unsigned int)l;}
+
+
+#elif defined(LUA_IEEE754TRICK)		/* }{ */
+/* the next trick should work on any machine using IEEE754 with
+   a 32-bit int type */
+
+union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
+
+#if !defined(LUA_IEEEENDIAN)	/* { */
+#define LUAI_EXTRAIEEE	\
+  static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
+#define LUA_IEEEENDIANLOC	(ieeeendian.l_p[1] == 33)
+#else
+#define LUA_IEEEENDIANLOC	LUA_IEEEENDIAN
+#define LUAI_EXTRAIEEE		/* empty */
+#endif				/* } */
+
+#define lua_number2int32(i,n,t) \
+  { LUAI_EXTRAIEEE \
+    volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
+    (i) = (t)u.l_p[LUA_IEEEENDIANLOC]; }
+
+#define luai_hashnum(i,n)  \
+  { volatile union luai_Cast u; u.l_d = (n) + 1.0;  /* avoid -0 */ \
+    (i) = u.l_p[0]; (i) += u.l_p[1]; }  /* add double bits for his hash */
+
+#define lua_number2int(i,n)		lua_number2int32(i, n, int)
+#define lua_number2unsigned(i,n)	lua_number2int32(i, n, lua_Unsigned)
+
+/* the trick can be expanded to lua_Integer when it is a 32-bit value */
+#if defined(LUA_IEEELL)
+#define lua_number2integer(i,n)		lua_number2int32(i, n, lua_Integer)
 #endif
 
-/* exponentiation */
-#if !defined(luai_numpow)
-#define luai_numpow(L,a,b)      ((void)L, l_mathop(pow)(a,b))
+#endif				/* } */
+
+
+/* the following definitions always work, but may be slow */
+
+#if !defined(lua_number2int)
+#define lua_number2int(i,n)	((i)=(int)(n))
 #endif
 
-/* the others are quite standard operations */
-#if !defined(luai_numadd)
-#define luai_numadd(L,a,b)      ((a)+(b))
-#define luai_numsub(L,a,b)      ((a)-(b))
-#define luai_nummul(L,a,b)      ((a)*(b))
-#define luai_numunm(L,a)        (-(a))
-#define luai_numeq(a,b)         ((a)==(b))
-#define luai_numlt(a,b)         ((a)<(b))
-#define luai_numle(a,b)         ((a)<=(b))
-#define luai_numisnan(a)        (!luai_numeq((a), (a)))
+#if !defined(lua_number2integer)
+#define lua_number2integer(i,n)	((i)=(lua_Integer)(n))
+#endif
+
+#if !defined(lua_number2unsigned)	/* { */
+/* the following definition assures proper modulo behavior */
+#if defined(LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_FLOAT)
+#include <math.h>
+#define SUPUNSIGNED	((lua_Number)(~(lua_Unsigned)0) + 1)
+#define lua_number2unsigned(i,n)  \
+	((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
+#else
+#define lua_number2unsigned(i,n)	((i)=(lua_Unsigned)(n))
+#endif
+#endif				/* } */
+
+
+#if !defined(lua_unsigned2number)
+/* on several machines, coercion from unsigned to double is slow,
+   so it may be worth to avoid */
+#define lua_unsigned2number(u)  \
+    (((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u))
 #endif
 
 
 
+#if defined(ltable_c) && !defined(luai_hashnum)
+
+#include <float.h>
+#include <math.h>
+
+#define luai_hashnum(i,n) { int e;  \
+  n = l_mathop(frexp)(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP);  \
+  lua_number2int(i, n); i += e; }
+
+#endif
+
 
 
 /*
 ** macro to control inclusion of some hard tests on stack reallocation
 */
 #if !defined(HARDSTACKTESTS)
-#define condmovestack(L,pre,pos)	((void)0)
+#define condmovestack(L)	((void)0)
 #else
 /* realloc stack keeping its size */
-#define condmovestack(L,pre,pos)  \
-	{ int sz_ = (L)->stacksize; pre; luaD_reallocstack((L), sz_); pos; }
+#define condmovestack(L)	luaD_reallocstack((L), (L)->stacksize)
 #endif
 
 #if !defined(HARDMEMTESTS)
-#define condchangemem(L,pre,pos)	((void)0)
+#define condchangemem(L)	condmovestack(L)
 #else
-#define condchangemem(L,pre,pos)  \
-	{ if (G(L)->gcrunning) { pre; luaC_fullgc(L, 0); pos; } }
+#define condchangemem(L)  \
+	((void)(!(G(L)->gcrunning) || (luaC_fullgc(L, 0), 1)))
 #endif
 
 #endif

lmathlib.c

@@ -1,18 +1,16 @@
 /*
-** $Id: lmathlib.c,v 1.116 2015/06/26 19:30:32 roberto Exp $
+** $Id: lmathlib.c,v 1.83 2013/03/07 18:21:32 roberto Exp $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
 
-#define lmathlib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <stdlib.h>
 #include <math.h>
 
+#define lmathlib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -20,30 +18,13 @@
 
 
 #undef PI
-#define PI	(l_mathop(3.141592653589793238462643383279502884))
+#define PI	((lua_Number)(3.1415926535897932384626433832795))
+#define RADIANS_PER_DEGREE	((lua_Number)(PI/180.0))
 
 
-#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);
-    if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
-    lua_pushinteger(L, n);
-  }
-  else
-    lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
+  lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
   return 1;
 }
 
@@ -52,16 +33,31 @@ static int math_sin (lua_State *L) {
   return 1;
 }
 
+static int math_sinh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
 static int math_cos (lua_State *L) {
   lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
   return 1;
 }
 
+static int math_cosh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
 static int math_tan (lua_State *L) {
   lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
   return 1;
 }
 
+static int math_tanh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
 static int math_asin (lua_State *L) {
   lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
   return 1;
@@ -73,106 +69,49 @@ static int math_acos (lua_State *L) {
 }
 
 static int math_atan (lua_State *L) {
-  lua_Number y = luaL_checknumber(L, 1);
-  lua_Number x = luaL_optnumber(L, 2, 1);
-  lua_pushnumber(L, l_mathop(atan2)(y, x));
+  lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1)));
   return 1;
 }
 
-
-static int math_toint (lua_State *L) {
-  int valid;
-  lua_Integer n = lua_tointegerx(L, 1, &valid);
-  if (valid)
-    lua_pushinteger(L, n);
-  else {
-    luaL_checkany(L, 1);
-    lua_pushnil(L);  /* value is not convertible to integer */
-  }
+static int math_atan2 (lua_State *L) {
+  lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1),
+                                luaL_checknumber(L, 2)));
   return 1;
 }
 
-
-static void pushnumint (lua_State *L, lua_Number d) {
-  lua_Integer n;
-  if (lua_numbertointeger(d, &n))  /* does 'd' fit in an integer? */
-    lua_pushinteger(L, n);  /* result is integer */
-  else
-    lua_pushnumber(L, d);  /* result is float */
-}
-
-
-static int math_floor (lua_State *L) {
-  if (lua_isinteger(L, 1))
-    lua_settop(L, 1);  /* integer is its own floor */
-  else {
-    lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
-    pushnumint(L, d);
-  }
-  return 1;
-}
-
-
 static int math_ceil (lua_State *L) {
-  if (lua_isinteger(L, 1))
-    lua_settop(L, 1);  /* integer is its own ceil */
-  else {
-    lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
-    pushnumint(L, d);
-  }
+  lua_pushnumber(L, l_mathop(ceil)(luaL_checknumber(L, 1)));
   return 1;
 }
 
+static int math_floor (lua_State *L) {
+  lua_pushnumber(L, l_mathop(floor)(luaL_checknumber(L, 1)));
+  return 1;
+}
 
 static int math_fmod (lua_State *L) {
-  if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
-    lua_Integer d = lua_tointeger(L, 2);
-    if ((lua_Unsigned)d + 1u <= 1u) {  /* special cases: -1 or 0 */
-      luaL_argcheck(L, d != 0, 2, "zero");
-      lua_pushinteger(L, 0);  /* avoid overflow with 0x80000... / -1 */
-    }
-    else
-      lua_pushinteger(L, lua_tointeger(L, 1) % d);
-  }
-  else
-    lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
-                                     luaL_checknumber(L, 2)));
+  lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
+                               luaL_checknumber(L, 2)));
   return 1;
 }
 
-
-/*
-** next function does not use 'modf', avoiding problems with 'double*'
-** (which is not compatible with 'float*') when lua_Number is not
-** 'double'.
-*/
 static int math_modf (lua_State *L) {
-  if (lua_isinteger(L ,1)) {
-    lua_settop(L, 1);  /* number is its own integer part */
-    lua_pushnumber(L, 0);  /* no fractional part */
-  }
-  else {
-    lua_Number n = luaL_checknumber(L, 1);
-    /* integer part (rounds toward zero) */
-    lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
-    pushnumint(L, ip);
-    /* fractional part (test needed for inf/-inf) */
-    lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
-  }
+  lua_Number ip;
+  lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip);
+  lua_pushnumber(L, ip);
+  lua_pushnumber(L, fp);
   return 2;
 }
 
-
 static int math_sqrt (lua_State *L) {
   lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
   return 1;
 }
 
-
-static int math_ult (lua_State *L) {
-  lua_Integer a = luaL_checkinteger(L, 1);
-  lua_Integer b = luaL_checkinteger(L, 2);
-  lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
+static int math_pow (lua_State *L) {
+  lua_Number x = luaL_checknumber(L, 1);
+  lua_Number y = luaL_checknumber(L, 2);
+  lua_pushnumber(L, l_mathop(pow)(x, y));
   return 1;
 }
 
@@ -183,142 +122,32 @@ static int math_log (lua_State *L) {
     res = l_mathop(log)(x);
   else {
     lua_Number base = luaL_checknumber(L, 2);
-#if !defined(LUA_USE_C89)
-    if (base == 2.0) res = l_mathop(log2)(x); else
-#endif
-    if (base == 10.0) res = l_mathop(log10)(x);
+    if (base == (lua_Number)10.0) res = l_mathop(log10)(x);
     else res = l_mathop(log)(x)/l_mathop(log)(base);
   }
   lua_pushnumber(L, res);
   return 1;
 }
 
+#if defined(LUA_COMPAT_LOG10)
+static int math_log10 (lua_State *L) {
+  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
+  return 1;
+}
+#endif
+
 static int math_exp (lua_State *L) {
   lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
   return 1;
 }
 
 static int math_deg (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
+  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
   return 1;
 }
 
 static int math_rad (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
-  return 1;
-}
-
-
-static int math_min (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int imin = 1;  /* index of current minimum value */
-  int i;
-  luaL_argcheck(L, n >= 1, 1, "value expected");
-  for (i = 2; i <= n; i++) {
-    if (lua_compare(L, i, imin, LUA_OPLT))
-      imin = i;
-  }
-  lua_pushvalue(L, imin);
-  return 1;
-}
-
-
-static int math_max (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  int imax = 1;  /* index of current maximum value */
-  int i;
-  luaL_argcheck(L, n >= 1, 1, "value expected");
-  for (i = 2; i <= n; i++) {
-    if (lua_compare(L, imax, i, LUA_OPLT))
-      imax = i;
-  }
-  lua_pushvalue(L, imax);
-  return 1;
-}
-
-/*
-** 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.)
-*/
-static int math_random (lua_State *L) {
-  lua_Integer low, up;
-  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, (lua_Number)r);  /* Number between 0 and 1 */
-      return 1;
-    }
-    case 1: {  /* only upper limit */
-      low = 1;
-      up = luaL_checkinteger(L, 1);
-      break;
-    }
-    case 2: {  /* lower and upper limits */
-      low = luaL_checkinteger(L, 1);
-      up = luaL_checkinteger(L, 2);
-      break;
-    }
-    default: return luaL_error(L, "wrong number of arguments");
-  }
-  /* random integer in the interval [low, up] */
-  luaL_argcheck(L, low <= up, 1, "interval is empty"); 
-  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 int math_randomseed (lua_State *L) {
-  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 {
-    luaL_checkany(L, 1);
-    lua_pushnil(L);
-  }
-  return 1;
-}
-
-
-/*
-** {==================================================================
-** Deprecated functions (for compatibility only)
-** ===================================================================
-*/
-#if defined(LUA_COMPAT_MATHLIB)
-
-static int math_cosh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_sinh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_tanh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
-static int math_pow (lua_State *L) {
-  lua_Number x = luaL_checknumber(L, 1);
-  lua_Number y = luaL_checknumber(L, 2);
-  lua_pushnumber(L, l_mathop(pow)(x, y));
+  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
   return 1;
 }
 
@@ -331,60 +160,107 @@ static int math_frexp (lua_State *L) {
 
 static int math_ldexp (lua_State *L) {
   lua_Number x = luaL_checknumber(L, 1);
-  int ep = (int)luaL_checkinteger(L, 2);
+  int ep = luaL_checkint(L, 2);
   lua_pushnumber(L, l_mathop(ldexp)(x, ep));
   return 1;
 }
 
-static int math_log10 (lua_State *L) {
-  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
+
+
+static int math_min (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  lua_Number dmin = luaL_checknumber(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
+    lua_Number d = luaL_checknumber(L, i);
+    if (d < dmin)
+      dmin = d;
+  }
+  lua_pushnumber(L, dmin);
   return 1;
 }
 
-#endif
-/* }================================================================== */
 
+static int math_max (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  lua_Number dmax = luaL_checknumber(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
+    lua_Number d = luaL_checknumber(L, i);
+    if (d > dmax)
+      dmax = d;
+  }
+  lua_pushnumber(L, dmax);
+  return 1;
+}
+
+
+static int math_random (lua_State *L) {
+  /* the `%' avoids the (rare) case of r==1, and is needed also because on
+     some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
+  lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
+  switch (lua_gettop(L)) {  /* check number of arguments */
+    case 0: {  /* no arguments */
+      lua_pushnumber(L, r);  /* Number between 0 and 1 */
+      break;
+    }
+    case 1: {  /* only upper limit */
+      lua_Number u = luaL_checknumber(L, 1);
+      luaL_argcheck(L, (lua_Number)1.0 <= u, 1, "interval is empty");
+      lua_pushnumber(L, l_mathop(floor)(r*u) + (lua_Number)(1.0));  /* [1, u] */
+      break;
+    }
+    case 2: {  /* lower and upper limits */
+      lua_Number l = luaL_checknumber(L, 1);
+      lua_Number u = luaL_checknumber(L, 2);
+      luaL_argcheck(L, l <= u, 2, "interval is empty");
+      lua_pushnumber(L, l_mathop(floor)(r*(u-l+1)) + l);  /* [l, u] */
+      break;
+    }
+    default: return luaL_error(L, "wrong number of arguments");
+  }
+  return 1;
+}
+
+
+static int math_randomseed (lua_State *L) {
+  srand(luaL_checkunsigned(L, 1));
+  (void)rand(); /* discard first value to avoid undesirable correlations */
+  return 0;
+}
 
 
 static const luaL_Reg mathlib[] = {
   {"abs",   math_abs},
   {"acos",  math_acos},
   {"asin",  math_asin},
+  {"atan2", math_atan2},
   {"atan",  math_atan},
   {"ceil",  math_ceil},
+  {"cosh",   math_cosh},
   {"cos",   math_cos},
   {"deg",   math_deg},
   {"exp",   math_exp},
-  {"tointeger", math_toint},
   {"floor", math_floor},
   {"fmod",   math_fmod},
-  {"ult",   math_ult},
+  {"frexp", math_frexp},
+  {"ldexp", math_ldexp},
+#if defined(LUA_COMPAT_LOG10)
+  {"log10", math_log10},
+#endif
   {"log",   math_log},
   {"max",   math_max},
   {"min",   math_min},
   {"modf",   math_modf},
+  {"pow",   math_pow},
   {"rad",   math_rad},
   {"random",     math_random},
   {"randomseed", math_randomseed},
+  {"sinh",   math_sinh},
   {"sin",   math_sin},
   {"sqrt",  math_sqrt},
-  {"tan",   math_tan},
-  {"type", math_type},
-#if defined(LUA_COMPAT_MATHLIB)
-  {"atan2", math_atan},
-  {"cosh",   math_cosh},
-  {"sinh",   math_sinh},
   {"tanh",   math_tanh},
-  {"pow",   math_pow},
-  {"frexp", math_frexp},
-  {"ldexp", math_ldexp},
-  {"log10", math_log10},
-#endif
-  /* placeholders */
-  {"pi", NULL},
-  {"huge", NULL},
-  {"maxinteger", NULL},
-  {"mininteger", NULL},
+  {"tan",   math_tan},
   {NULL, NULL}
 };
 
@@ -396,12 +272,8 @@ LUAMOD_API int luaopen_math (lua_State *L) {
   luaL_newlib(L, mathlib);
   lua_pushnumber(L, PI);
   lua_setfield(L, -2, "pi");
-  lua_pushnumber(L, (lua_Number)HUGE_VAL);
+  lua_pushnumber(L, HUGE_VAL);
   lua_setfield(L, -2, "huge");
-  lua_pushinteger(L, LUA_MAXINTEGER);
-  lua_setfield(L, -2, "maxinteger");
-  lua_pushinteger(L, LUA_MININTEGER);
-  lua_setfield(L, -2, "mininteger");
   return 1;
 }
 

lmem.c

@@ -1,17 +1,15 @@
 /*
-** $Id: lmem.c,v 1.90 2015/03/03 18:18:29 roberto Exp roberto $
+** $Id: lmem.c,v 1.84 2012/05/23 15:41:53 roberto Exp $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
 
-#define lmem_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <stddef.h>
 
+#define lmem_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "ldebug.h"
@@ -26,15 +24,15 @@
 /*
 ** About the realloc function:
 ** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
-** ('osize' is the old size, 'nsize' is the new size)
+** (`osize' is the old size, `nsize' is the new size)
 **
-** * frealloc(ud, NULL, x, s) creates a new block of size 's' (no
+** * frealloc(ud, NULL, x, s) creates a new block of size `s' (no
 ** matter 'x').
 **
-** * frealloc(ud, p, x, 0) frees the block 'p'
+** * 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)
+** (which is equivalent to free(NULL) in ANSI C)
 **
 ** frealloc returns NULL if it cannot create or reallocate the area
 ** (any reallocation to an equal or smaller size cannot fail!)
@@ -85,8 +83,9 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
 #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? */
+    api_check(L, nsize > realosize,
+                 "realloc cannot fail when shrinking a block");
+    if (g->gcrunning) {
       luaC_fullgc(L, 1);  /* try to free some memory... */
       newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
     }

lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h,v 1.42 2014/12/19 13:45:40 roberto Exp roberto $
+** $Id: lmem.h,v 1.40 2013/02/20 14:08:21 roberto Exp $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -15,32 +15,20 @@
 
 
 /*
-** 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
-** when it does it, it may give a warning about "comparison is always
-** false due to limited range of data type"; the +1 tricks the compiler,
-** avoiding this warning but also this optimization.)
+** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
+** always constant.
+** The macro is somewhat complex to avoid warnings:
+** +1 avoids warnings of "comparison has constant result";
+** cast to 'void' avoids warnings of "value unused".
 */
 #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)) , \
+  (cast(void, \
+     (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 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(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
-
 #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_freearray(L, b, n)   luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
 
 #define luaM_malloc(L,s)	luaM_realloc_(L, NULL, 0, (s))
 #define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.126 2015/02/16 13:14:33 roberto Exp roberto $
+** $Id: loadlib.c,v 1.111 2012/05/30 12:33:44 roberto Exp $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -8,16 +8,22 @@
 ** systems.
 */
 
-#define loadlib_c
-#define LUA_LIB
 
-#include "lprefix.h"
+/*
+** if needed, includes windows header before everything else
+*/
+#if defined(_WIN32)
+#include <windows.h>
+#endif
 
 
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+
+#define loadlib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -25,21 +31,21 @@
 
 
 /*
-** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
+** LUA_PATH and LUA_CPATH are the names of the environment
 ** variables that Lua check to set its paths.
 */
-#if !defined(LUA_PATH_VAR)
-#define LUA_PATH_VAR	"LUA_PATH"
+#if !defined(LUA_PATH)
+#define LUA_PATH	"LUA_PATH"
 #endif
 
-#if !defined(LUA_CPATH_VAR)
-#define LUA_CPATH_VAR	"LUA_CPATH"
+#if !defined(LUA_CPATH)
+#define LUA_CPATH	"LUA_CPATH"
 #endif
 
 #define LUA_PATHSUFFIX		"_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
 
-#define LUA_PATHVARVERSION		LUA_PATH_VAR LUA_PATHSUFFIX
-#define LUA_CPATHVARVERSION		LUA_CPATH_VAR LUA_PATHSUFFIX
+#define LUA_PATHVERSION		LUA_PATH LUA_PATHSUFFIX
+#define LUA_CPATHVERSION	LUA_CPATH LUA_PATHSUFFIX
 
 /*
 ** LUA_PATH_SEP is the character that separates templates in a path.
@@ -86,45 +92,29 @@
 #define LUA_OFSEP	"_"
 
 
-/*
-** unique key for table in the registry that keeps handles
-** for all loaded C libraries
-*/
-static const int CLIBS = 0;
+/* table (in the registry) that keeps handles for all loaded C libraries */
+#define CLIBS		"_CLIBS"
 
 #define LIB_FAIL	"open"
 
+
+/* error codes for ll_loadfunc */
+#define ERRLIB		1
+#define ERRFUNC		2
+
 #define setprogdir(L)		((void)0)
 
 
 /*
 ** system-dependent functions
 */
-
-/*
-** unload library 'lib'
-*/
-static void lsys_unloadlib (void *lib);
-
-/*
-** load C library in file 'path'. If 'seeglb', load with all names in
-** the library global.
-** Returns the library; in case of error, returns NULL plus an
-** error string in the stack.
-*/
-static void *lsys_load (lua_State *L, const char *path, int seeglb);
-
-/*
-** Try to find a function named 'sym' in library 'lib'.
-** Returns the function; in case of error, returns NULL plus an
-** error string in the stack.
-*/
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
+static void ll_unloadlib (void *lib);
+static void *ll_load (lua_State *L, const char *path, int seeglb);
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
 
 
 
-
-#if defined(LUA_USE_DLOPEN)	/* { */
+#if defined(LUA_USE_DLOPEN)
 /*
 ** {========================================================================
 ** This is an implementation of loadlib based on the dlfcn interface.
@@ -136,32 +126,20 @@ static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
 
 #include <dlfcn.h>
 
-/*
-** Macro to convert pointer-to-void* to pointer-to-function. This cast
-** is undefined according to ISO C, but POSIX assumes that it works.
-** (The '__extension__' in gnu compilers is only to avoid warnings.)
-*/
-#if defined(__GNUC__)
-#define cast_func(p) (__extension__ (lua_CFunction)(p))
-#else
-#define cast_func(p) ((lua_CFunction)(p))
-#endif
-
-
-static void lsys_unloadlib (void *lib) {
+static void ll_unloadlib (void *lib) {
   dlclose(lib);
 }
 
 
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+static void *ll_load (lua_State *L, const char *path, int seeglb) {
   void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
   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));
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+  lua_CFunction f = (lua_CFunction)dlsym(lib, sym);
   if (f == NULL) lua_pushstring(L, dlerror());
   return f;
 }
@@ -170,15 +148,13 @@ static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
 
 
 
-#elif defined(LUA_DL_DLL)	/* }{ */
+#elif defined(LUA_DL_DLL)
 /*
 ** {======================================================================
 ** This is an implementation of loadlib for Windows using native functions.
 ** =======================================================================
 */
 
-#include <windows.h>
-
 #undef setprogdir
 
 /*
@@ -214,12 +190,12 @@ static void pusherror (lua_State *L) {
     lua_pushfstring(L, "system error %d\n", error);
 }
 
-static void lsys_unloadlib (void *lib) {
+static void ll_unloadlib (void *lib) {
   FreeLibrary((HMODULE)lib);
 }
 
 
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+static void *ll_load (lua_State *L, const char *path, int seeglb) {
   HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
   (void)(seeglb);  /* not used: symbols are 'global' by default */
   if (lib == NULL) pusherror(L);
@@ -227,7 +203,7 @@ 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) {
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
   lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
   if (f == NULL) pusherror(L);
   return f;
@@ -236,7 +212,7 @@ static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
 /* }====================================================== */
 
 
-#else				/* }{ */
+#else
 /*
 ** {======================================================
 ** Fallback for other systems
@@ -250,34 +226,31 @@ static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
 #define DLMSG	"dynamic libraries not enabled; check your Lua installation"
 
 
-static void lsys_unloadlib (void *lib) {
+static void ll_unloadlib (void *lib) {
   (void)(lib);  /* not used */
 }
 
 
-static void *lsys_load (lua_State *L, const char *path, int seeglb) {
+static void *ll_load (lua_State *L, const char *path, int seeglb) {
   (void)(path); (void)(seeglb);  /* not used */
   lua_pushliteral(L, DLMSG);
   return NULL;
 }
 
 
-static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
   (void)(lib); (void)(sym);  /* not used */
   lua_pushliteral(L, DLMSG);
   return NULL;
 }
 
 /* }====================================================== */
-#endif				/* } */
+#endif
 
 
-/*
-** return registry.CLIBS[path]
-*/
-static void *checkclib (lua_State *L, const char *path) {
+static void *ll_checkclib (lua_State *L, const char *path) {
   void *plib;
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
+  lua_getfield(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' */
@@ -285,12 +258,8 @@ static void *checkclib (lua_State *L, const char *path) {
 }
 
 
-/*
-** registry.CLIBS[path] = plib        -- for queries
-** registry.CLIBS[#CLIBS + 1] = plib  -- also keep a list of all libraries
-*/
-static void addtoclib (lua_State *L, const char *path, void *plib) {
-  lua_rawgetp(L, LUA_REGISTRYINDEX, &CLIBS);
+static void ll_addtoclib (lua_State *L, const char *path, void *plib) {
+  lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
   lua_pushlightuserdata(L, plib);
   lua_pushvalue(L, -1);
   lua_setfield(L, -3, path);  /* CLIBS[path] = plib */
@@ -300,49 +269,33 @@ static void addtoclib (lua_State *L, const char *path, void *plib) {
 
 
 /*
-** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
+** __gc tag method for CLIBS table: calls 'll_unloadlib' for all lib
 ** handles in list CLIBS
 */
 static int gctm (lua_State *L) {
-  lua_Integer n = luaL_len(L, 1);
+  int n = luaL_len(L, 1);
   for (; n >= 1; n--) {  /* for each handle, in reverse order */
     lua_rawgeti(L, 1, n);  /* get handle CLIBS[n] */
-    lsys_unloadlib(lua_touserdata(L, -1));
+    ll_unloadlib(lua_touserdata(L, -1));
     lua_pop(L, 1);  /* pop handle */
   }
   return 0;
 }
 
 
-
-/* error codes for 'lookforfunc' */
-#define ERRLIB		1
-#define ERRFUNC		2
-
-/*
-** Look for a C function named 'sym' in a dynamically loaded library
-** 'path'.
-** First, check whether the library is already loaded; if not, try
-** to load it.
-** Then, if 'sym' is '*', return true (as library has been loaded).
-** Otherwise, look for symbol 'sym' in the library and push a
-** C function with that symbol.
-** Return 0 and 'true' or a function in the stack; in case of
-** errors, return an error code and an error message in the stack.
-*/
-static int lookforfunc (lua_State *L, const char *path, const char *sym) {
-  void *reg = checkclib(L, path);  /* check loaded C libraries */
+static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
+  void *reg = ll_checkclib(L, path);  /* check loaded C libraries */
   if (reg == NULL) {  /* must load library? */
-    reg = lsys_load(L, path, *sym == '*');  /* global symbols if 'sym'=='*' */
+    reg = ll_load(L, path, *sym == '*');
     if (reg == NULL) return ERRLIB;  /* unable to load library */
-    addtoclib(L, path, reg);
+    ll_addtoclib(L, path, reg);
   }
   if (*sym == '*') {  /* loading only library (no function)? */
     lua_pushboolean(L, 1);  /* return 'true' */
     return 0;  /* no errors */
   }
   else {
-    lua_CFunction f = lsys_sym(L, reg, sym);
+    lua_CFunction f = ll_sym(L, reg, sym);
     if (f == NULL)
       return ERRFUNC;  /* unable to find function */
     lua_pushcfunction(L, f);  /* else create new function */
@@ -354,7 +307,7 @@ static int lookforfunc (lua_State *L, const char *path, const char *sym) {
 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);
+  int stat = ll_loadfunc(L, path, init);
   if (stat == 0)  /* no errors? */
     return 1;  /* return the loaded function */
   else {  /* error; error message is on stack top */
@@ -407,7 +360,7 @@ static const char *searchpath (lua_State *L, const char *name,
     lua_remove(L, -2);  /* remove path template */
     if (readable(filename))  /* does file exist and is readable? */
       return filename;  /* return that file name */
-    lua_pushfstring(L, "\n\tno file '%s'", filename);
+    lua_pushfstring(L, "\n\tno file " LUA_QS, filename);
     lua_remove(L, -2);  /* remove file name */
     luaL_addvalue(&msg);  /* concatenate error msg. entry */
   }
@@ -437,7 +390,7 @@ static const char *findfile (lua_State *L, const char *name,
   lua_getfield(L, lua_upvalueindex(1), pname);
   path = lua_tostring(L, -1);
   if (path == NULL)
-    luaL_error(L, "'package.%s' must be a string", pname);
+    luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
   return searchpath(L, name, path, ".", dirsep);
 }
 
@@ -448,7 +401,8 @@ static int checkload (lua_State *L, int stat, const char *filename) {
     return 2;  /* return open function and file name */
   }
   else
-    return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
+    return luaL_error(L, "error loading module " LUA_QS
+                         " from file " LUA_QS ":\n\t%s",
                           lua_tostring(L, 1), filename, lua_tostring(L, -1));
 }
 
@@ -462,29 +416,21 @@ static int searcher_Lua (lua_State *L) {
 }
 
 
-/*
-** Try to find a load function for module 'modname' at file 'filename'.
-** First, change '.' to '_' in 'modname'; then, if 'modname' has
-** the form X-Y (that is, it has an "ignore mark"), build a function
-** name "luaopen_X" and look for it. (For compatibility, if that
-** fails, it also tries "luaopen_Y".) If there is no ignore mark,
-** look for a function named "luaopen_modname".
-*/
 static int loadfunc (lua_State *L, const char *filename, const char *modname) {
-  const char *openfunc;
+  const char *funcname;
   const char *mark;
   modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
   mark = strchr(modname, *LUA_IGMARK);
   if (mark) {
     int stat;
-    openfunc = lua_pushlstring(L, modname, mark - modname);
-    openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
-    stat = lookforfunc(L, filename, openfunc);
+    funcname = lua_pushlstring(L, modname, mark - modname);
+    funcname = lua_pushfstring(L, LUA_POF"%s", funcname);
+    stat = ll_loadfunc(L, filename, funcname);
     if (stat != ERRFUNC) return stat;
     modname = mark + 1;  /* else go ahead and try old-style name */
   }
-  openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
-  return lookforfunc(L, filename, openfunc);
+  funcname = lua_pushfstring(L, LUA_POF"%s", modname);
+  return ll_loadfunc(L, filename, funcname);
 }
 
 
@@ -509,7 +455,8 @@ 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, "\n\tno module '%s' in file '%s'", name, filename);
+      lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
+                         name, filename);
       return 1;
     }
   }
@@ -521,7 +468,8 @@ 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, "_PRELOAD");
-  if (lua_getfield(L, -1, name) == LUA_TNIL)  /* not found? */
+  lua_getfield(L, -1, name);
+  if (lua_isnil(L, -1))  /* not found? */
     lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
   return 1;
 }
@@ -531,15 +479,17 @@ static void findloader (lua_State *L, const char *name) {
   int i;
   luaL_Buffer msg;  /* to build error message */
   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");
+  lua_getfield(L, lua_upvalueindex(1), "searchers");  /* will be at index 3 */
+  if (!lua_istable(L, 3))
+    luaL_error(L, LUA_QL("package.searchers") " must be a table");
   /*  iterate over available searchers to find a loader */
   for (i = 1; ; i++) {
-    if (lua_rawgeti(L, 3, i) == LUA_TNIL) {  /* no more searchers? */
+    lua_rawgeti(L, 3, i);  /* get a searcher */
+    if (lua_isnil(L, -1)) {  /* no more searchers? */
       lua_pop(L, 1);  /* remove nil */
       luaL_pushresult(&msg);  /* create error message */
-      luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
+      luaL_error(L, "module " LUA_QS " not found:%s",
+                    name, lua_tostring(L, -1));
     }
     lua_pushstring(L, name);
     lua_call(L, 1, 2);  /* call it */
@@ -570,7 +520,8 @@ static int ll_require (lua_State *L) {
   lua_call(L, 2, 1);  /* run loader to load module */
   if (!lua_isnil(L, -1))  /* non-nil return? */
     lua_setfield(L, 2, name);  /* _LOADED[name] = returned value */
-  if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
+  lua_getfield(L, 2, name);
+  if (lua_isnil(L, -1)) {   /* module did not set a value? */
     lua_pushboolean(L, 1);  /* use true as result */
     lua_pushvalue(L, -1);  /* extra copy to be returned */
     lua_setfield(L, 2, name);  /* _LOADED[name] = true */
@@ -597,7 +548,7 @@ static void set_env (lua_State *L) {
   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");
+    luaL_error(L, LUA_QL("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 */
@@ -636,8 +587,9 @@ static int ll_module (lua_State *L) {
   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 */
+  lua_getfield(L, -1, "_NAME");
+  if (!lua_isnil(L, -1))  /* is table an initialized module? */
+    lua_pop(L, 1);
   else {  /* no; initialize it */
     lua_pop(L, 1);
     modinit(L, modname);
@@ -707,12 +659,6 @@ static const luaL_Reg pk_funcs[] = {
 #if defined(LUA_COMPAT_MODULE)
   {"seeall", ll_seeall},
 #endif
-  /* placeholders */
-  {"preload", NULL},
-  {"cpath", NULL},
-  {"path", NULL},
-  {"searchers", NULL},
-  {"loaded", NULL},
   {NULL, NULL}
 };
 
@@ -732,50 +678,42 @@ static void createsearcherstable (lua_State *L) {
   int i;
   /* create 'searchers' table */
   lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
-  /* fill it with predefined searchers */
+  /* fill it with pre-defined searchers */
   for (i=0; searchers[i] != NULL; i++) {
     lua_pushvalue(L, -2);  /* set 'package' as upvalue for all searchers */
     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' */
-}
-
-
-/*
-** create table CLIBS to keep track of loaded C libraries,
-** setting a finalizer to close all libraries when closing state.
-*/
-static void createclibstable (lua_State *L) {
-  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 */
 }
 
 
 LUAMOD_API int luaopen_package (lua_State *L) {
-  createclibstable(L);
-  luaL_newlib(L, pk_funcs);  /* create 'package' table */
+  /* create table CLIBS to keep track of loaded C libraries */
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);
+  lua_createtable(L, 0, 1);  /* metatable for CLIBS */
+  lua_pushcfunction(L, gctm);
+  lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
+  lua_setmetatable(L, -2);
+  /* create `package' table */
+  luaL_newlib(L, pk_funcs);
   createsearcherstable(L);
+#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' */
   /* set field 'path' */
-  setpath(L, "path", LUA_PATHVARVERSION, LUA_PATH_VAR, LUA_PATH_DEFAULT);
+  setpath(L, "path", LUA_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT);
   /* set field 'cpath' */
-  setpath(L, "cpath", LUA_CPATHVARVERSION, LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
+  setpath(L, "cpath", LUA_CPATHVERSION, LUA_CPATH, LUA_CPATH_DEFAULT);
   /* store config information */
   lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
                      LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
   lua_setfield(L, -2, "config");
-  /* set field 'loaded' */
+  /* set field `loaded' */
   luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
   lua_setfield(L, -2, "loaded");
-  /* set field 'preload' */
+  /* set field `preload' */
   luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
   lua_setfield(L, -2, "preload");
   lua_pushglobaltable(L);

lobject.c

@@ -1,22 +1,17 @@
 /*
-** $Id: lobject.c,v 2.107 2015/11/02 14:02:35 roberto Exp roberto $
+** $Id: lobject.c,v 2.58 2013/02/20 14:08:56 roberto Exp $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
 
-#define lobject_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
-
-#include <locale.h>
-#include <math.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define lobject_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lctype.h"
@@ -41,12 +36,8 @@ LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT};
 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) */
+  while (x >= 0x10) {
+    x = (x+1) >> 1;
     e++;
   }
   return ((e+1) << 3) | (cast_int(x) - 8);
@@ -55,15 +46,14 @@ int luaO_int2fb (unsigned int x) {
 
 /* converts back */
 int luaO_fb2int (int x) {
-  return (x < 8) ? x : ((x & 7) + 8) << ((x >> 3) - 1);
+  int e = (x >> 3) & 0x1f;
+  if (e == 0) return x;
+  else return ((x & 7) + 8) << (e - 1);
 }
 
 
-/*
-** Computes ceil(log2(x))
-*/
 int luaO_ceillog2 (unsigned int x) {
-  static const lu_byte log_2[256] = {  /* log_2[i] = ceil(log2(i - 1)) */
+  static const lu_byte log_2[256] = {
     0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
     6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
     7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
@@ -80,92 +70,31 @@ int luaO_ceillog2 (unsigned int x) {
 }
 
 
-static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
-                                                   lua_Integer v2) {
+lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) {
   switch (op) {
-    case LUA_OPADD: return intop(+, v1, v2);
-    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_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);
-    case LUA_OPSHL: return luaV_shiftl(v1, v2);
-    case LUA_OPSHR: return luaV_shiftl(v1, -v2);
-    case LUA_OPUNM: return intop(-, 0, v1);
-    case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
+    case LUA_OPADD: return luai_numadd(NULL, v1, v2);
+    case LUA_OPSUB: return luai_numsub(NULL, v1, v2);
+    case LUA_OPMUL: return luai_nummul(NULL, v1, v2);
+    case LUA_OPDIV: return luai_numdiv(NULL, v1, v2);
+    case LUA_OPMOD: return luai_nummod(NULL, v1, v2);
+    case LUA_OPPOW: return luai_numpow(NULL, v1, v2);
+    case LUA_OPUNM: return luai_numunm(NULL, v1);
     default: lua_assert(0); return 0;
   }
 }
 
 
-static lua_Number numarith (lua_State *L, int op, lua_Number v1,
-                                                  lua_Number v2) {
-  switch (op) {
-    case LUA_OPADD: return luai_numadd(L, v1, v2);
-    case LUA_OPSUB: return luai_numsub(L, v1, v2);
-    case LUA_OPMUL: return luai_nummul(L, v1, v2);
-    case LUA_OPDIV: return luai_numdiv(L, v1, v2);
-    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: {
-      lua_Number m;
-      luai_nummod(L, v1, v2, m);
-      return m;
-    }
-    default: lua_assert(0); return 0;
-  }
-}
-
-
-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 (tointeger(p1, &i1) && tointeger(p2, &i2)) {
-        setivalue(res, intarith(L, op, i1, i2));
-        return;
-      }
-      else break;  /* go to the end */
-    }
-    case LUA_OPDIV: case LUA_OPPOW: {  /* operate only on floats */
-      lua_Number n1; lua_Number n2;
-      if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
-        setfltvalue(res, numarith(L, op, n1, n2));
-        return;
-      }
-      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;
-      }
-      else if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
-        setfltvalue(res, numarith(L, op, n1, n2));
-        return;
-      }
-      else break;  /* go to the end */
-    }
-  }
-  /* 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));
-}
-
-
 int luaO_hexavalue (int c) {
   if (lisdigit(c)) return c - '0';
-  else return (ltolower(c) - 'a') + 10;
+  else return ltolower(c) - 'a' + 10;
 }
 
 
+#if !defined(lua_strx2number)
+
+#include <math.h>
+
+
 static int isneg (const char **s) {
   if (**s == '-') { (*s)++; return 1; }
   else if (**s == '+') (*s)++;
@@ -173,191 +102,86 @@ static int isneg (const char **s) {
 }
 
 
+static lua_Number readhexa (const char **s, lua_Number r, int *count) {
+  for (; lisxdigit(cast_uchar(**s)); (*s)++) {  /* read integer part */
+    r = (r * cast_num(16.0)) + cast_num(luaO_hexavalue(cast_uchar(**s)));
+    (*count)++;
+  }
+  return r;
+}
 
-/*
-** {==================================================================
-** Lua's implementation for 'lua_strx2number'
-** ===================================================================
-*/
-
-#if !defined(lua_strx2number)
-
-/* maximum number of significant digits to read (to avoid overflows
-   even with single floats) */
-#define MAXSIGDIG	30
 
 /*
 ** convert an hexadecimal numeric string to a number, following
 ** C99 specification for 'strtod'
 */
 static lua_Number lua_strx2number (const char *s, char **endptr) {
-  int dot = lua_getlocaledecpoint();
-  lua_Number r = 0.0;  /* result (accumulator) */
-  int sigdig = 0;  /* number of significant digits */
-  int nosigdig = 0;  /* number of non-significant digits */
-  int e = 0;  /* exponent correction */
-  int neg;  /* 1 if number is negative */
-  int hasdot = 0;  /* true after seen a dot */
+  lua_Number r = 0.0;
+  int e = 0, i = 0;
+  int neg = 0;  /* 1 if number is negative */
   *endptr = cast(char *, s);  /* nothing is valid yet */
   while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
   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 */
-    if (*s == dot) {
-      if (hasdot) break;  /* second dot? stop loop */
-      else hasdot = 1;
-    }
-    else if (lisxdigit(cast_uchar(*s))) {
-      if (sigdig == 0 && *s == '0')  /* non-significant digit (zero)? */
-        nosigdig++;
-      else if (++sigdig <= MAXSIGDIG)  /* can read it without overflow? */
-          r = (r * cast_num(16.0)) + luaO_hexavalue(*s);
-      else e++; /* too many digits; ignore, but still count for exponent */
-      if (hasdot) e--;  /* decimal digit? correct exponent */
-    }
-    else break;  /* neither a dot nor a digit */
+  s += 2;  /* skip '0x' */
+  r = readhexa(&s, r, &i);  /* read integer part */
+  if (*s == '.') {
+    s++;  /* skip dot */
+    r = readhexa(&s, r, &e);  /* read fractional part */
   }
-  if (nosigdig + sigdig == 0)  /* no digits? */
-    return 0.0;  /* invalid format */
+  if (i == 0 && e == 0)
+    return 0.0;  /* invalid format (no digit) */
+  e *= -4;  /* each fractional digit divides value by 2^-4 */
   *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 signal */
+    int exp1 = 0;
+    int neg1;
     s++;  /* skip 'p' */
     neg1 = isneg(&s);  /* signal */
     if (!lisdigit(cast_uchar(*s)))
-      return 0.0;  /* invalid; must have at least one digit */
+      goto ret;  /* 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(char *, s);  /* valid up to here */
   }
+  *endptr = cast(char *, s);  /* valid up to here */
+ ret:
   if (neg) r = -r;
   return l_mathop(ldexp)(r, e);
 }
 
 #endif
-/* }====================================================== */
 
 
-static const char *l_str2d (const char *s, lua_Number *result) {
+int luaO_str2d (const char *s, size_t len, lua_Number *result) {
   char *endptr;
   if (strpbrk(s, "nN"))  /* reject 'inf' and 'nan' */
-    return NULL;
-  else if (strpbrk(s, "xX"))  /* hex? */
+    return 0;
+  else if (strpbrk(s, "xX"))  /* hexa? */
     *result = lua_strx2number(s, &endptr);
   else
     *result = lua_str2number(s, &endptr);
-  if (endptr == s) return NULL;  /* nothing recognized */
+  if (endptr == s) return 0;  /* nothing recognized */
   while (lisspace(cast_uchar(*endptr))) endptr++;
-  return (*endptr == '\0' ? endptr : NULL);  /* OK if no trailing characters */
+  return (endptr == s + len);  /* OK if no trailing characters */
 }
 
 
-static const char *l_str2int (const char *s, lua_Integer *result) {
-  lua_Unsigned a = 0;
-  int empty = 1;
-  int neg;
-  while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
-  neg = isneg(&s);
-  if (s[0] == '0' &&
-      (s[1] == 'x' || s[1] == 'X')) {  /* hex? */
-    s += 2;  /* skip '0x' */
-    for (; lisxdigit(cast_uchar(*s)); s++) {
-      a = a * 16 + luaO_hexavalue(*s);
-      empty = 0;
-    }
-  }
-  else {  /* decimal */
-    for (; lisdigit(cast_uchar(*s)); s++) {
-      a = a * 10 + *s - '0';
-      empty = 0;
-    }
-  }
-  while (lisspace(cast_uchar(*s))) s++;  /* skip trailing spaces */
-  if (empty || *s != '\0') return NULL;  /* something wrong in the numeral */
-  else {
-    *result = l_castU2S((neg) ? 0u - a : a);
-    return s;
-  }
-}
-
-
-size_t luaO_str2num (const char *s, TValue *o) {
-  lua_Integer i; lua_Number n;
-  const char *e;
-  if ((e = l_str2int(s, &i)) != NULL) {  /* try as an integer */
-    setivalue(o, i);
-  }
-  else if ((e = l_str2d(s, &n)) != NULL) {  /* else try as a float */
-    setfltvalue(o, n);
-  }
-  else
-    return 0;  /* conversion failed */
-  return (e - s) + 1;  /* success; return string size */
-}
-
-
-int luaO_utf8esc (char *buff, unsigned long x) {
-  int n = 1;  /* number of bytes put in buffer (backwards) */
-  lua_assert(x <= 0x10FFFF);
-  if (x < 0x80)  /* ascii? */
-    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));
-      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 */
-  }
-  return n;
-}
-
-
-/* maximum length of the conversion of a number to a string */
-#define MAXNUMBER2STR	50
-
-
-/*
-** Convert a number object to a string
-*/
-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, sizeof(buff), ivalue(obj));
-  else {
-    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
-  }
-  setsvalue2s(L, obj, luaS_newlstr(L, buff, len));
-}
-
 
 static void pushstr (lua_State *L, const char *str, size_t l) {
-  setsvalue2s(L, L->top, luaS_newlstr(L, str, l));
-  luaD_inctop(L);
+  setsvalue2s(L, L->top++, luaS_newlstr(L, str, l));
 }
 
 
-/* this function handles only '%d', '%c', '%f', '%p', and '%s' 
-   conventional formats, plus Lua-specific '%I' and '%U' */
+/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
 const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
   int n = 0;
   for (;;) {
     const char *e = strchr(fmt, '%');
     if (e == NULL) break;
+    luaD_checkstack(L, 2);  /* fmt + item */
     pushstr(L, fmt, e - fmt);
     switch (*(e+1)) {
       case 's': {
@@ -367,47 +191,33 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
         break;
       }
       case 'c': {
-        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));
+        char buff;
+        buff = cast(char, va_arg(argp, int));
+        pushstr(L, &buff, 1);
         break;
       }
       case 'd': {
-        setivalue(L->top, va_arg(argp, int));
-        goto top2str;
-      }
-      case 'I': {
-        setivalue(L->top, cast(lua_Integer, va_arg(argp, l_uacInt)));
-        goto top2str;
+        setnvalue(L->top++, cast_num(va_arg(argp, int)));
+        break;
       }
       case 'f': {
-        setfltvalue(L->top, cast_num(va_arg(argp, l_uacNumber)));
-      top2str:
-        luaD_inctop(L);
-        luaO_tostring(L, L->top - 1);
+        setnvalue(L->top++, cast_num(va_arg(argp, l_uacNumber)));
         break;
       }
       case 'p': {
-        char buff[4*sizeof(void *) + 8]; /* should be enough space for a '%p' */
-        int l = l_sprintf(buff, sizeof(buff), "%p", va_arg(argp, void *));
+        char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
+        int l = sprintf(buff, "%p", va_arg(argp, void *));
         pushstr(L, buff, l);
         break;
       }
-      case 'U': {
-        char buff[UTF8BUFFSZ];
-        int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long)));
-        pushstr(L, buff + UTF8BUFFSZ - l, l);
-        break;
-      }
       case '%': {
         pushstr(L, "%", 1);
         break;
       }
       default: {
-        luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
-                         *(e + 1));
+        luaG_runerror(L,
+            "invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"),
+            *(e + 1));
       }
     }
     n += 2;

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 2.115 2015/10/28 17:28:40 roberto Exp roberto $
+** $Id: lobject.h,v 2.71.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -19,13 +19,14 @@
 /*
 ** Extra tags for non-values
 */
-#define LUA_TPROTO	LUA_NUMTAGS		/* function prototypes */
-#define LUA_TDEADKEY	(LUA_NUMTAGS+1)		/* removed keys in tables */
+#define LUA_TPROTO	LUA_NUMTAGS
+#define LUA_TUPVAL	(LUA_NUMTAGS+1)
+#define LUA_TDEADKEY	(LUA_NUMTAGS+2)
 
 /*
 ** number of all possible tags (including LUA_TNONE but excluding DEADKEY)
 */
-#define LUA_TOTALTAGS	(LUA_TPROTO + 2)
+#define LUA_TOTALTAGS	(LUA_TUPVAL+2)
 
 
 /*
@@ -35,6 +36,8 @@
 ** bit 6: whether value is collectable
 */
 
+#define VARBITS		(3 << 4)
+
 
 /*
 ** LUA_TFUNCTION variants:
@@ -54,11 +57,6 @@
 #define LUA_TLNGSTR	(LUA_TSTRING | (1 << 4))  /* long strings */
 
 
-/* Variant tags for numbers */
-#define LUA_TNUMFLT	(LUA_TNUMBER | (0 << 4))  /* float numbers */
-#define LUA_TNUMINT	(LUA_TNUMBER | (1 << 4))  /* integer numbers */
-
-
 /* Bit mark for collectable types */
 #define BIT_ISCOLLECTABLE	(1 << 6)
 
@@ -67,9 +65,9 @@
 
 
 /*
-** Common type for all collectable objects
+** Union of all collectable objects
 */
-typedef struct GCObject GCObject;
+typedef union GCObject GCObject;
 
 
 /*
@@ -80,40 +78,32 @@ typedef struct GCObject GCObject;
 
 
 /*
-** Common type has only the common header
+** Common header in struct form
 */
-struct GCObject {
+typedef struct GCheader {
   CommonHeader;
-};
+} GCheader;
 
 
 
+/*
+** Union of all Lua values
+*/
+typedef union Value Value;
+
+
+#define numfield	lua_Number n;    /* numbers */
+
+
 
 /*
 ** Tagged Values. This is the basic representation of values in Lua,
 ** an actual value plus a tag with its type.
 */
 
-/*
-** Union of all Lua values
-*/
-typedef union Value {
-  GCObject *gc;    /* collectable objects */
-  void *p;         /* light userdata */
-  int b;           /* booleans */
-  lua_CFunction f; /* light C functions */
-  lua_Integer i;   /* integer numbers */
-  lua_Number n;    /* float numbers */
-} Value;
-
-
 #define TValuefields	Value value_; int tt_
 
-
-typedef struct lua_TValue {
-  TValuefields;
-} TValue;
-
+typedef struct lua_TValue TValue;
 
 
 /* macro defining a nil value */
@@ -121,6 +111,7 @@ typedef struct lua_TValue {
 
 
 #define val_(o)		((o)->value_)
+#define num_(o)		(val_(o).n)
 
 
 /* raw type tag of a TValue */
@@ -133,15 +124,13 @@ typedef struct lua_TValue {
 #define ttype(o)	(rttype(o) & 0x3F)
 
 /* type tag of a TValue with no variants (bits 0-3) */
-#define ttnov(o)	(novariant(rttype(o)))
+#define ttypenv(o)	(novariant(rttype(o)))
 
 
 /* Macros to test type */
 #define checktag(o,t)		(rttype(o) == (t))
-#define checktype(o,t)		(ttnov(o) == (t))
-#define ttisnumber(o)		checktype((o), LUA_TNUMBER)
-#define ttisfloat(o)		checktag((o), LUA_TNUMFLT)
-#define ttisinteger(o)		checktag((o), LUA_TNUMINT)
+#define checktype(o,t)		(ttypenv(o) == (t))
+#define ttisnumber(o)		checktag((o), LUA_TNUMBER)
 #define ttisnil(o)		checktag((o), LUA_TNIL)
 #define ttisboolean(o)		checktag((o), LUA_TBOOLEAN)
 #define ttislightuserdata(o)	checktag((o), LUA_TLIGHTUSERDATA)
@@ -154,27 +143,27 @@ typedef struct lua_TValue {
 #define ttisCclosure(o)		checktag((o), ctb(LUA_TCCL))
 #define ttisLclosure(o)		checktag((o), ctb(LUA_TLCL))
 #define ttislcf(o)		checktag((o), LUA_TLCF)
-#define ttisfulluserdata(o)	checktag((o), ctb(LUA_TUSERDATA))
+#define ttisuserdata(o)		checktag((o), ctb(LUA_TUSERDATA))
 #define ttisthread(o)		checktag((o), ctb(LUA_TTHREAD))
 #define ttisdeadkey(o)		checktag((o), LUA_TDEADKEY)
 
+#define ttisequal(o1,o2)	(rttype(o1) == rttype(o2))
 
 /* Macros to access values */
-#define ivalue(o)	check_exp(ttisinteger(o), val_(o).i)
-#define fltvalue(o)	check_exp(ttisfloat(o), val_(o).n)
-#define nvalue(o)	check_exp(ttisnumber(o), \
-	(ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
+#define nvalue(o)	check_exp(ttisnumber(o), num_(o))
 #define gcvalue(o)	check_exp(iscollectable(o), val_(o).gc)
 #define pvalue(o)	check_exp(ttislightuserdata(o), val_(o).p)
-#define tsvalue(o)	check_exp(ttisstring(o), gco2ts(val_(o).gc))
-#define uvalue(o)	check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
-#define clvalue(o)	check_exp(ttisclosure(o), gco2cl(val_(o).gc))
-#define clLvalue(o)	check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
-#define clCvalue(o)	check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
+#define rawtsvalue(o)	check_exp(ttisstring(o), &val_(o).gc->ts)
+#define tsvalue(o)	(&rawtsvalue(o)->tsv)
+#define rawuvalue(o)	check_exp(ttisuserdata(o), &val_(o).gc->u)
+#define uvalue(o)	(&rawuvalue(o)->uv)
+#define clvalue(o)	check_exp(ttisclosure(o), &val_(o).gc->cl)
+#define clLvalue(o)	check_exp(ttisLclosure(o), &val_(o).gc->cl.l)
+#define clCvalue(o)	check_exp(ttisCclosure(o), &val_(o).gc->cl.c)
 #define fvalue(o)	check_exp(ttislcf(o), val_(o).f)
-#define hvalue(o)	check_exp(ttistable(o), gco2t(val_(o).gc))
+#define hvalue(o)	check_exp(ttistable(o), &val_(o).gc->h)
 #define bvalue(o)	check_exp(ttisboolean(o), val_(o).b)
-#define thvalue(o)	check_exp(ttisthread(o), gco2th(val_(o).gc))
+#define thvalue(o)	check_exp(ttisthread(o), &val_(o).gc->th)
 /* a dead value may get the 'gc' field, but cannot access its contents */
 #define deadvalue(o)	check_exp(ttisdeadkey(o), cast(void *, val_(o).gc))
 
@@ -185,27 +174,18 @@ typedef struct lua_TValue {
 
 
 /* Macros for internal tests */
-#define righttt(obj)		(ttype(obj) == gcvalue(obj)->tt)
+#define righttt(obj)		(ttype(obj) == gcvalue(obj)->gch.tt)
 
-#define checkliveness(L,obj) \
+#define checkliveness(g,obj) \
 	lua_longassert(!iscollectable(obj) || \
-		(righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj)))))
+			(righttt(obj) && !isdead(g,gcvalue(obj))))
 
 
 /* Macros to set values */
 #define settt_(o,t)	((o)->tt_=(t))
 
-#define setfltvalue(obj,x) \
-  { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_TNUMFLT); }
-
-#define chgfltvalue(obj,x) \
-  { TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); }
-
-#define setivalue(obj,x) \
-  { TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_TNUMINT); }
-
-#define chgivalue(obj,x) \
-  { TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); }
+#define setnvalue(obj,x) \
+  { TValue *io=(obj); num_(io)=(x); settt_(io, LUA_TNUMBER); }
 
 #define setnilvalue(obj) settt_(obj, LUA_TNIL)
 
@@ -219,46 +199,48 @@ typedef struct lua_TValue {
   { TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
 
 #define setgcovalue(L,obj,x) \
-  { TValue *io = (obj); GCObject *i_g=(x); \
-    val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
+  { TValue *io=(obj); GCObject *i_g=(x); \
+    val_(io).gc=i_g; settt_(io, ctb(gch(i_g)->tt)); }
 
 #define setsvalue(L,obj,x) \
-  { TValue *io = (obj); TString *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    TString *x_ = (x); \
+    val_(io).gc=cast(GCObject *, x_); settt_(io, ctb(x_->tsv.tt)); \
+    checkliveness(G(L),io); }
 
 #define setuvalue(L,obj,x) \
-  { TValue *io = (obj); Udata *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TUSERDATA)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TUSERDATA)); \
+    checkliveness(G(L),io); }
 
 #define setthvalue(L,obj,x) \
-  { TValue *io = (obj); lua_State *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTHREAD)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTHREAD)); \
+    checkliveness(G(L),io); }
 
 #define setclLvalue(L,obj,x) \
-  { TValue *io = (obj); LClosure *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TLCL)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TLCL)); \
+    checkliveness(G(L),io); }
 
 #define setclCvalue(L,obj,x) \
-  { TValue *io = (obj); CClosure *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TCCL)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TCCL)); \
+    checkliveness(G(L),io); }
 
 #define sethvalue(L,obj,x) \
-  { TValue *io = (obj); Table *x_ = (x); \
-    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTABLE)); \
-    checkliveness(L,io); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTABLE)); \
+    checkliveness(G(L),io); }
 
 #define setdeadvalue(obj)	settt_(obj, LUA_TDEADKEY)
 
 
 
 #define setobj(L,obj1,obj2) \
-	{ TValue *io1=(obj1); *io1 = *(obj2); \
-	  (void)L; checkliveness(L,io1); }
+	{ const TValue *io2=(obj2); TValue *io1=(obj1); \
+	  io1->value_ = io2->value_; io1->tt_ = io2->tt_; \
+	  checkliveness(G(L),io1); }
 
 
 /*
@@ -274,13 +256,125 @@ typedef struct lua_TValue {
 #define setptvalue2s	setptvalue
 /* from table to same table */
 #define setobjt2t	setobj
+/* to table */
+#define setobj2t	setobj
 /* to new object */
 #define setobj2n	setobj
 #define setsvalue2n	setsvalue
 
-/* to table (define it as an expression to be used in macros) */
-#define setobj2t(L,o1,o2)  ((void)L, *(o1)=*(o2), checkliveness(L,(o1)))
 
+/* check whether a number is valid (useful only for NaN trick) */
+#define luai_checknum(L,o,c)	{ /* empty */ }
+
+
+/*
+** {======================================================
+** NaN Trick
+** =======================================================
+*/
+#if defined(LUA_NANTRICK)
+
+/*
+** numbers are represented in the 'd_' field. All other values have the
+** value (NNMARK | tag) in 'tt__'. A number with such pattern would be
+** a "signaled NaN", which is never generated by regular operations by
+** the CPU (nor by 'strtod')
+*/
+
+/* allows for external implementation for part of the trick */
+#if !defined(NNMARK)	/* { */
+
+
+#if !defined(LUA_IEEEENDIAN)
+#error option 'LUA_NANTRICK' needs 'LUA_IEEEENDIAN'
+#endif
+
+
+#define NNMARK		0x7FF7A500
+#define NNMASK		0x7FFFFF00
+
+#undef TValuefields
+#undef NILCONSTANT
+
+#if (LUA_IEEEENDIAN == 0)	/* { */
+
+/* little endian */
+#define TValuefields  \
+	union { struct { Value v__; int tt__; } i; double d__; } u
+#define NILCONSTANT	{{{NULL}, tag2tt(LUA_TNIL)}}
+/* field-access macros */
+#define v_(o)		((o)->u.i.v__)
+#define d_(o)		((o)->u.d__)
+#define tt_(o)		((o)->u.i.tt__)
+
+#else				/* }{ */
+
+/* big endian */
+#define TValuefields  \
+	union { struct { int tt__; Value v__; } i; double d__; } u
+#define NILCONSTANT	{{tag2tt(LUA_TNIL), {NULL}}}
+/* field-access macros */
+#define v_(o)		((o)->u.i.v__)
+#define d_(o)		((o)->u.d__)
+#define tt_(o)		((o)->u.i.tt__)
+
+#endif				/* } */
+
+#endif			/* } */
+
+
+/* correspondence with standard representation */
+#undef val_
+#define val_(o)		v_(o)
+#undef num_
+#define num_(o)		d_(o)
+
+
+#undef numfield
+#define numfield	/* no such field; numbers are the entire struct */
+
+/* basic check to distinguish numbers from non-numbers */
+#undef ttisnumber
+#define ttisnumber(o)	((tt_(o) & NNMASK) != NNMARK)
+
+#define tag2tt(t)	(NNMARK | (t))
+
+#undef rttype
+#define rttype(o)	(ttisnumber(o) ? LUA_TNUMBER : tt_(o) & 0xff)
+
+#undef settt_
+#define settt_(o,t)	(tt_(o) = tag2tt(t))
+
+#undef setnvalue
+#define setnvalue(obj,x) \
+	{ TValue *io_=(obj); num_(io_)=(x); lua_assert(ttisnumber(io_)); }
+
+#undef setobj
+#define setobj(L,obj1,obj2) \
+	{ const TValue *o2_=(obj2); TValue *o1_=(obj1); \
+	  o1_->u = o2_->u; \
+	  checkliveness(G(L),o1_); }
+
+
+/*
+** these redefinitions are not mandatory, but these forms are more efficient
+*/
+
+#undef checktag
+#undef checktype
+#define checktag(o,t)	(tt_(o) == tag2tt(t))
+#define checktype(o,t)	(ctb(tt_(o) | VARBITS) == ctb(tag2tt(t) | VARBITS))
+
+#undef ttisequal
+#define ttisequal(o1,o2)  \
+	(ttisnumber(o1) ? ttisnumber(o2) : (tt_(o1) == tt_(o2)))
+
+
+#undef luai_checknum
+#define luai_checknum(L,o,c)	{ if (!ttisnumber(o)) c; }
+
+#endif
+/* }====================================================== */
 
 
 
@@ -291,6 +385,20 @@ typedef struct lua_TValue {
 */
 
 
+union Value {
+  GCObject *gc;    /* collectable objects */
+  void *p;         /* light userdata */
+  int b;           /* booleans */
+  lua_CFunction f; /* light C functions */
+  numfield         /* numbers */
+};
+
+
+struct lua_TValue {
+  TValuefields;
+};
+
+
 typedef TValue *StkId;  /* index to stack elements */
 
 
@@ -298,94 +406,46 @@ typedef TValue *StkId;  /* index to stack elements */
 
 /*
 ** Header for string value; string bytes follow the end of this structure
-** (aligned according to 'UTString'; see next).
 */
-typedef struct TString {
-  CommonHeader;
-  lu_byte extra;  /* reserved words for short strings; "has hash" for longs */
-  lu_byte shrlen;  /* length for short strings */
-  unsigned int hash;
-  union {
-    size_t lnglen;  /* length for long strings */
-    struct TString *hnext;  /* linked list for hash table */
-  } u;
+typedef union TString {
+  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
+  struct {
+    CommonHeader;
+    lu_byte extra;  /* reserved words for short strings; "has hash" for longs */
+    unsigned int hash;
+    size_t len;  /* number of characters in string */
+  } tsv;
 } TString;
 
 
-/*
-** Ensures that address after this type is always fully aligned.
-*/
-typedef union UTString {
-  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
-  TString tsv;
-} UTString;
-
-
-/*
-** Get the actual string (array of bytes) from a 'TString'.
-** (Access to 'extra' ensures that value is really a 'TString'.)
-*/
-#define getstr(ts)  \
-  check_exp(sizeof((ts)->extra), cast(char *, (ts)) + sizeof(UTString))
-
+/* get the actual string (array of bytes) from a TString */
+#define getstr(ts)	cast(const char *, (ts) + 1)
 
 /* get the actual string (array of bytes) from a Lua value */
-#define svalue(o)       getstr(tsvalue(o))
-
-/* get string length from 'TString *s' */
-#define tsslen(s)	((s)->tt == LUA_TSHRSTR ? (s)->shrlen : (s)->u.lnglen)
-
-/* get string length from 'TValue *o' */
-#define vslen(o)	tsslen(tsvalue(o))
+#define svalue(o)       getstr(rawtsvalue(o))
 
 
 /*
 ** Header for userdata; memory area follows the end of this structure
-** (aligned according to 'UUdata'; see next).
 */
-typedef struct Udata {
-  CommonHeader;
-  lu_byte ttuv_;  /* user value's tag */
-  struct Table *metatable;
-  size_t len;  /* number of bytes */
-  union Value user_;  /* user value */
+typedef union Udata {
+  L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
+  struct {
+    CommonHeader;
+    struct Table *metatable;
+    struct Table *env;
+    size_t len;  /* number of bytes */
+  } uv;
 } Udata;
 
 
-/*
-** Ensures that address after this type is always fully aligned.
-*/
-typedef union UUdata {
-  L_Umaxalign dummy;  /* ensures maximum alignment for 'local' udata */
-  Udata uv;
-} UUdata;
-
-
-/*
-**  Get the address of memory block inside 'Udata'.
-** (Access to 'ttuv_' ensures that value is really a 'Udata'.)
-*/
-#define getudatamem(u)  \
-  check_exp(sizeof((u)->ttuv_), (cast(char*, (u)) + sizeof(UUdata)))
-
-#define setuservalue(L,u,o) \
-	{ const TValue *io=(o); Udata *iu = (u); \
-	  iu->user_ = io->value_; iu->ttuv_ = rttype(io); \
-	  checkliveness(L,io); }
-
-
-#define getuservalue(L,u,o) \
-	{ TValue *io=(o); const Udata *iu = (u); \
-	  io->value_ = iu->user_; settt_(io, iu->ttuv_); \
-	  checkliveness(L,io); }
-
 
 /*
 ** Description of an upvalue for function prototypes
 */
 typedef struct Upvaldesc {
   TString *name;  /* upvalue name (for debug information) */
-  lu_byte instack;  /* whether it is in stack (register) */
+  lu_byte instack;  /* whether it is in stack */
   lu_byte idx;  /* index of upvalue (in stack or in outer function's list) */
 } Upvaldesc;
 
@@ -406,26 +466,26 @@ typedef struct LocVar {
 */
 typedef struct Proto {
   CommonHeader;
-  lu_byte numparams;  /* number of fixed parameters */
-  lu_byte is_vararg;  /* 2: declared vararg; 1: uses vararg */
-  lu_byte maxstacksize;  /* number of registers needed by this function */
-  int sizeupvalues;  /* size of 'upvalues' */
-  int sizek;  /* size of 'k' */
-  int sizecode;
-  int sizelineinfo;
-  int sizep;  /* size of 'p' */
-  int sizelocvars;
-  int linedefined;  /* debug information  */
-  int lastlinedefined;  /* debug information  */
   TValue *k;  /* constants used by the function */
-  Instruction *code;  /* opcodes */
+  Instruction *code;
   struct Proto **p;  /* functions defined inside the function */
   int *lineinfo;  /* map from opcodes to source lines (debug information) */
   LocVar *locvars;  /* information about local variables (debug information) */
   Upvaldesc *upvalues;  /* upvalue information */
-  struct LClosure *cache;  /* last-created closure with this prototype */
+  union Closure *cache;  /* last created closure with this prototype */
   TString  *source;  /* used for debug information */
+  int sizeupvalues;  /* size of 'upvalues' */
+  int sizek;  /* size of `k' */
+  int sizecode;
+  int sizelineinfo;
+  int sizep;  /* size of `p' */
+  int sizelocvars;
+  int linedefined;
+  int lastlinedefined;
   GCObject *gclist;
+  lu_byte numparams;  /* number of fixed parameters */
+  lu_byte is_vararg;
+  lu_byte maxstacksize;  /* maximum stack used by this function */
 } Proto;
 
 
@@ -433,7 +493,17 @@ typedef struct Proto {
 /*
 ** Lua Upvalues
 */
-typedef struct UpVal UpVal;
+typedef struct UpVal {
+  CommonHeader;
+  TValue *v;  /* points to stack or to its own value */
+  union {
+    TValue value;  /* the value (when closed) */
+    struct {  /* double linked list (when open) */
+      struct UpVal *prev;
+      struct UpVal *next;
+    } l;
+  } u;
+} UpVal;
 
 
 /*
@@ -475,19 +545,12 @@ typedef union Closure {
 typedef union TKey {
   struct {
     TValuefields;
-    int next;  /* for chaining (offset for next node) */
+    struct Node *next;  /* for chaining */
   } nk;
   TValue tvk;
 } TKey;
 
 
-/* copy a value into a key without messing up field 'next' */
-#define setnodekey(L,key,obj) \
-	{ TKey *k_=(key); const TValue *io_=(obj); \
-	  k_->nk.value_ = io_->value_; k_->nk.tt_ = io_->tt_; \
-	  (void)L; checkliveness(L,io_); }
-
-
 typedef struct Node {
   TValue i_val;
   TKey i_key;
@@ -497,8 +560,8 @@ typedef struct Node {
 typedef struct Table {
   CommonHeader;
   lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
-  lu_byte lsizenode;  /* log2 of size of 'node' array */
-  unsigned int sizearray;  /* size of 'array' array */
+  lu_byte lsizenode;  /* log2 of size of `node' array */
+  int sizearray;  /* size of `array' array */
   TValue *array;  /* array part */
   Node *node;
   Node *lastfree;  /* any free position is before this position */
@@ -509,7 +572,7 @@ typedef struct Table {
 
 
 /*
-** 'module' operation for hashing (size is always a power of 2)
+** `module' operation for hashing (size is always a power of 2)
 */
 #define lmod(s,size) \
 	(check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1)))))
@@ -527,18 +590,13 @@ typedef struct Table {
 
 LUAI_DDEC const TValue luaO_nilobject_;
 
-/* size of buffer for 'luaO_utf8esc' function */
-#define UTF8BUFFSZ	8
 
 LUAI_FUNC int luaO_int2fb (unsigned int x);
 LUAI_FUNC int luaO_fb2int (int x);
-LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
 LUAI_FUNC int luaO_ceillog2 (unsigned int x);
-LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
-                           const TValue *p2, TValue *res);
-LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
+LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2);
+LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result);
 LUAI_FUNC int luaO_hexavalue (int c);
-LUAI_FUNC void luaO_tostring (lua_State *L, StkId obj);
 LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
                                                        va_list argp);
 LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);

lopcodes.c

@@ -1,16 +1,13 @@
 /*
-** $Id: lopcodes.c,v 1.54 2014/11/02 19:19:04 roberto Exp roberto $
+** $Id: lopcodes.c,v 1.49 2012/05/14 13:34:18 roberto Exp $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
 
+
 #define lopcodes_c
 #define LUA_CORE
 
-#include "lprefix.h"
-
-
-#include <stddef.h>
 
 #include "lopcodes.h"
 
@@ -34,17 +31,10 @@ LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
   "ADD",
   "SUB",
   "MUL",
+  "DIV",
   "MOD",
   "POW",
-  "DIV",
-  "IDIV",
-  "BAND",
-  "BOR",
-  "BXOR",
-  "SHL",
-  "SHR",
   "UNM",
-  "BNOT",
   "NOT",
   "LEN",
   "CONCAT",
@@ -89,17 +79,10 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
  ,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_DIV */
  ,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 */

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.147 2014/10/20 18:29:55 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.142.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -14,12 +14,12 @@
   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
+	`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
+	`Bx' : 18 bits (`B' and `C' together)
+	`sBx' : signed Bx
 
   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
@@ -58,7 +58,7 @@ enum OpMode {iABC, iABx, iAsBx, iAx};  /* basic instruction format */
 */
 #if SIZE_Bx < LUAI_BITSINT-1
 #define MAXARG_Bx        ((1<<SIZE_Bx)-1)
-#define MAXARG_sBx        (MAXARG_Bx>>1)         /* 'sBx' is signed */
+#define MAXARG_sBx        (MAXARG_Bx>>1)         /* `sBx' is signed */
 #else
 #define MAXARG_Bx        MAX_INT
 #define MAXARG_sBx        MAX_INT
@@ -76,10 +76,10 @@ enum OpMode {iABC, iABx, iAsBx, iAx};  /* basic instruction format */
 #define MAXARG_C        ((1<<SIZE_C)-1)
 
 
-/* creates a mask with 'n' 1 bits at position 'p' */
+/* creates a mask with `n' 1 bits at position `p' */
 #define MASK1(n,p)	((~((~(Instruction)0)<<(n)))<<(p))
 
-/* creates a mask with 'n' 0 bits at position 'p' */
+/* creates a mask with `n' 0 bits at position `p' */
 #define MASK0(n,p)	(~MASK1(n,p))
 
 /*
@@ -187,17 +187,10 @@ OP_SELF,/*	A B C	R(A+1) := R(B); R(A) := R(B)[RK(C)]		*/
 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_DIV,/*	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)				*/
 
@@ -238,16 +231,16 @@ OP_EXTRAARG/*	Ax	extra (larger) argument for previous opcode	*/
 
 /*===========================================================================
   Notes:
-  (*) In OP_CALL, if (B == 0) then B = top. If (C == 0), then 'top' is
+  (*) 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'.
+  OP_SETLIST) may use `top'.
 
   (*) 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_RETURN, if (B == 0) then return up to `top'.
 
-  (*) In OP_SETLIST, if (B == 0) then B = 'top'; if (C == 0) then next
+  (*) In OP_SETLIST, if (B == 0) then B = `top'; if (C == 0) then next
   'instruction' is EXTRAARG(real C).
 
   (*) In OP_LOADKX, the next 'instruction' is always EXTRAARG.
@@ -255,7 +248,7 @@ OP_EXTRAARG/*	Ax	extra (larger) argument for previous opcode	*/
   (*) For comparisons, A specifies what condition the test should accept
   (true or false).
 
-  (*) All 'skips' (pc++) assume that next instruction is a jump.
+  (*) All `skips' (pc++) assume that next instruction is a jump.
 
 ===========================================================================*/
 

loslib.c

@@ -1,14 +1,9 @@
 /*
-** $Id: loslib.c,v 1.59 2015/07/06 15:16:51 roberto Exp roberto $
+** $Id: loslib.c,v 1.40 2012/10/19 15:54:02 roberto Exp $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
 
-#define loslib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <errno.h>
 #include <locale.h>
@@ -16,6 +11,9 @@
 #include <string.h>
 #include <time.h>
 
+#define loslib_c
+#define LUA_LIB
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -23,107 +21,59 @@
 
 
 /*
-** {==================================================================
 ** list of valid conversion specifiers for the 'strftime' function
-** ===================================================================
 */
-#if !defined(LUA_STRFTIMEOPTIONS)	/* { */
+#if !defined(LUA_STRFTIMEOPTIONS)
 
-#if defined(LUA_USE_C89)
+#if !defined(LUA_USE_POSIX)
 #define LUA_STRFTIMEOPTIONS	{ "aAbBcdHIjmMpSUwWxXyYz%", "" }
-#else  /* C99 specification */
+#else
 #define LUA_STRFTIMEOPTIONS \
-	{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "", \
-	  "E", "cCxXyY",  \
+	{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
+	  "", "E", "cCxXyY",  \
 	  "O", "deHImMSuUVwWy" }
 #endif
 
-#endif					/* } */
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Configuration for time-related stuff
-** ===================================================================
-*/
-
-#if !defined(l_time_t)		/* { */
-/*
-** type to represent time_t in Lua
-*/
-#define l_timet			lua_Integer
-#define l_pushtime(L,t)		lua_pushinteger(L,(lua_Integer)(t))
-
-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				/* } */
-
-
-#if !defined(l_gmtime)		/* { */
-/*
-** By default, Lua uses gmtime/localtime, except when POSIX is available,
-** where it uses gmtime_r/localtime_r
-*/
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#define l_gmtime(t,r)		gmtime_r(t,r)
-#define l_localtime(t,r)	localtime_r(t,r)
-
-#else				/* }{ */
-
-/* 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))
-
-#endif				/* } */
-
-#endif				/* } */
-
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Configuration for 'tmpnam':
-** By default, Lua uses tmpnam except when POSIX is available, where
-** it uses mkstemp.
-** ===================================================================
-*/
-#if !defined(lua_tmpnam)	/* { */
-
-#if defined(LUA_USE_POSIX)	/* { */
-
-#include <unistd.h>
-
-#define LUA_TMPNAMBUFSIZE	32
-
-#if !defined(LUA_TMPNAMTEMPLATE)
-#define LUA_TMPNAMTEMPLATE	"/tmp/lua_XXXXXX"
 #endif
 
+
+
+/*
+** By default, Lua uses tmpnam except when POSIX is available, where it
+** uses mkstemp.
+*/
+#if defined(LUA_USE_MKSTEMP)
+#include <unistd.h>
+#define LUA_TMPNAMBUFSIZE	32
 #define lua_tmpnam(b,e) { \
-        strcpy(b, LUA_TMPNAMTEMPLATE); \
+        strcpy(b, "/tmp/lua_XXXXXX"); \
         e = mkstemp(b); \
         if (e != -1) close(e); \
         e = (e == -1); }
 
-#else				/* }{ */
+#elif !defined(lua_tmpnam)
 
-/* ISO C definitions */
 #define LUA_TMPNAMBUFSIZE	L_tmpnam
 #define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
 
-#endif				/* } */
+#endif
 
-#endif				/* } */
-/* }================================================================== */
 
+/*
+** By default, Lua uses gmtime/localtime, except when POSIX is available,
+** where it uses gmtime_r/localtime_r
+*/
+#if defined(LUA_USE_GMTIME_R)
+
+#define l_gmtime(t,r)		gmtime_r(t,r)
+#define l_localtime(t,r)	localtime_r(t,r)
+
+#elif !defined(l_gmtime)
+
+#define l_gmtime(t,r)		((void)r, gmtime(t))
+#define l_localtime(t,r)  	((void)r, localtime(t))
+
+#endif
 
 
 
@@ -197,35 +147,24 @@ static void setboolfield (lua_State *L, const char *key, int value) {
 
 static int getboolfield (lua_State *L, const char *key) {
   int res;
-  res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
+  lua_getfield(L, -1, key);
+  res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
   lua_pop(L, 1);
   return res;
 }
 
 
-/* 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);
-  lua_Integer res = lua_tointegerx(L, -1, &isnum);
-  if (!isnum) {  /* field is not a number? */
-    if (t != LUA_TNIL)  /* some other value? */
-      return luaL_error(L, "field '%s' not an integer", key);
-    else if (d < 0)  /* absent field; no default? */
-      return luaL_error(L, "field '%s' missing in date table", key);
+static int getfield (lua_State *L, const char *key, int d) {
+  int res, isnum;
+  lua_getfield(L, -1, key);
+  res = (int)lua_tointegerx(L, -1, &isnum);
+  if (!isnum) {
+    if (d < 0)
+      return luaL_error(L, "field " LUA_QS " missing in date table", key);
     res = d;
   }
-  else {
-    if (!(-L_MAXDATEFIELD <= res && res <= L_MAXDATEFIELD))
-      return luaL_error(L, "field '%s' out-of-bounds", key);
-    res -= delta;
-  }
   lua_pop(L, 1);
-  return (int)res;
+  return res;
 }
 
 
@@ -253,23 +192,19 @@ static const char *checkoption (lua_State *L, const char *conv, char *buff) {
 }
 
 
-/* maximum size for an individual 'strftime' item */
-#define SIZETIMEFMT	250
-
-
 static int os_date (lua_State *L) {
   const char *s = luaL_optstring(L, 1, "%c");
-  time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
+  time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
   struct tm tmr, *stm;
   if (*s == '!') {  /* UTC? */
     stm = l_gmtime(&t, &tmr);
-    s++;  /* skip '!' */
+    s++;  /* skip `!' */
   }
   else
     stm = l_localtime(&t, &tmr);
   if (stm == NULL)  /* invalid date? */
-    luaL_error(L, "time result cannot be represented in this installation");
-  if (strcmp(s, "*t") == 0) {
+    lua_pushnil(L);
+  else if (strcmp(s, "*t") == 0) {
     lua_createtable(L, 0, 9);  /* 9 = number of fields */
     setfield(L, "sec", stm->tm_sec);
     setfield(L, "min", stm->tm_min);
@@ -287,14 +222,14 @@ static int os_date (lua_State *L) {
     cc[0] = '%';
     luaL_buffinit(L, &b);
     while (*s) {
-      if (*s != '%')  /* not a conversion specifier? */
+      if (*s != '%')  /* no conversion specifier? */
         luaL_addchar(&b, *s++);
       else {
         size_t reslen;
-        char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
+        char buff[200];  /* should be big enough for any conversion result */
         s = checkoption(L, s + 1, cc);
-        reslen = strftime(buff, SIZETIMEFMT, cc, stm);
-        luaL_addsize(&b, reslen);
+        reslen = strftime(buff, sizeof(buff), cc, stm);
+        luaL_addlstring(&b, buff, reslen);
       }
     }
     luaL_pushresult(&b);
@@ -311,26 +246,26 @@ 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_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_sec = getfield(L, "sec", 0);
+    ts.tm_min = getfield(L, "min", 0);
+    ts.tm_hour = getfield(L, "hour", 12);
+    ts.tm_mday = getfield(L, "day", -1);
+    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);
   }
-  if (t != (time_t)(l_timet)t || t == (time_t)(-1))
-    luaL_error(L, "time result cannot be represented in this installation");
-  l_pushtime(L, t);
+  if (t == (time_t)(-1))
+    lua_pushnil(L);
+  else
+    lua_pushnumber(L, (lua_Number)t);
   return 1;
 }
 
 
 static int os_difftime (lua_State *L) {
-  time_t t1 = l_checktime(L, 1);
-  time_t t2 = l_checktime(L, 2);
-  lua_pushnumber(L, (lua_Number)difftime(t1, t2));
+  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+                             (time_t)(luaL_optnumber(L, 2, 0))));
   return 1;
 }
 
@@ -354,7 +289,7 @@ static int os_exit (lua_State *L) {
   if (lua_isboolean(L, 1))
     status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
   else
-    status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
+    status = luaL_optint(L, 1, EXIT_SUCCESS);
   if (lua_toboolean(L, 2))
     lua_close(L);
   if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */

lparser.c

@@ -1,17 +1,15 @@
 /*
-** $Id: lparser.c,v 2.148 2015/10/28 17:28:40 roberto Exp roberto $
+** $Id: lparser.c,v 2.130 2013/02/06 13:37:39 roberto Exp $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
 
-#define lparser_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <string.h>
 
+#define lparser_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lcode.h"
@@ -37,21 +35,17 @@
 #define hasmultret(k)		((k) == VCALL || (k) == VVARARG)
 
 
-/* because all strings are unified by the scanner, the parser
-   can use pointer equality for string equality */
-#define eqstr(a,b)	((a) == (b))
-
 
 /*
 ** nodes for block list (list of active blocks)
 */
 typedef struct BlockCnt {
   struct BlockCnt *previous;  /* chain */
-  int firstlabel;  /* index of first label in this block */
-  int firstgoto;  /* index of first pending goto in this block */
+  short firstlabel;  /* index of first label in this block */
+  short firstgoto;  /* index of first pending goto in this block */
   lu_byte nactvar;  /* # active locals outside the block */
   lu_byte upval;  /* true if some variable in the block is an upvalue */
-  lu_byte isloop;  /* true if 'block' is a loop */
+  lu_byte isloop;  /* true if `block' is a loop */
 } BlockCnt;
 
 
@@ -63,9 +57,19 @@ static void statement (LexState *ls);
 static void expr (LexState *ls, expdesc *v);
 
 
+static void anchor_token (LexState *ls) {
+  /* last token from outer function must be EOS */
+  lua_assert(ls->fs != NULL || ls->t.token == TK_EOS);
+  if (ls->t.token == TK_NAME || ls->t.token == TK_STRING) {
+    TString *ts = ls->t.seminfo.ts;
+    luaX_newstring(ls, getstr(ts), ts->tsv.len);
+  }
+}
+
+
 /* semantic error */
 static l_noret semerror (LexState *ls, const char *msg) {
-  ls->t.token = 0;  /* remove "near <token>" from final message */
+  ls->t.token = 0;  /* remove 'near to' from final message */
   luaX_syntaxerror(ls, msg);
 }
 
@@ -218,7 +222,7 @@ static int searchupvalue (FuncState *fs, TString *name) {
   int i;
   Upvaldesc *up = fs->f->upvalues;
   for (i = 0; i < fs->nups; i++) {
-    if (eqstr(up[i].name, name)) return i;
+    if (luaS_eqstr(up[i].name, name)) return i;
   }
   return -1;  /* not found */
 }
@@ -242,7 +246,7 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
 static int searchvar (FuncState *fs, TString *n) {
   int i;
   for (i = cast_int(fs->nactvar) - 1; i >= 0; i--) {
-    if (eqstr(n, getlocvar(fs, i)->varname))
+    if (luaS_eqstr(n, getlocvar(fs, i)->varname))
       return i;
   }
   return -1;  /* not found */
@@ -338,11 +342,11 @@ static void closegoto (LexState *ls, int g, Labeldesc *label) {
   FuncState *fs = ls->fs;
   Labellist *gl = &ls->dyd->gt;
   Labeldesc *gt = &gl->arr[g];
-  lua_assert(eqstr(gt->name, label->name));
+  lua_assert(luaS_eqstr(gt->name, label->name));
   if (gt->nactvar < label->nactvar) {
     TString *vname = getlocvar(fs, gt->nactvar)->varname;
     const char *msg = luaO_pushfstring(ls->L,
-      "<goto %s> at line %d jumps into the scope of local '%s'",
+      "<goto %s> at line %d jumps into the scope of local " LUA_QS,
       getstr(gt->name), gt->line, getstr(vname));
     semerror(ls, msg);
   }
@@ -365,7 +369,7 @@ static int findlabel (LexState *ls, int g) {
   /* check labels in current block for a match */
   for (i = bl->firstlabel; i < dyd->label.n; i++) {
     Labeldesc *lb = &dyd->label.arr[i];
-    if (eqstr(lb->name, gt->name)) {  /* correct label? */
+    if (luaS_eqstr(lb->name, gt->name)) {  /* correct label? */
       if (gt->nactvar > lb->nactvar &&
           (bl->upval || dyd->label.n > bl->firstlabel))
         luaK_patchclose(ls->fs, gt->pc, lb->nactvar);
@@ -386,7 +390,7 @@ static int newlabelentry (LexState *ls, Labellist *l, TString *name,
   l->arr[n].line = line;
   l->arr[n].nactvar = ls->fs->nactvar;
   l->arr[n].pc = pc;
-  l->n = n + 1;
+  l->n++;
   return n;
 }
 
@@ -399,7 +403,7 @@ static void findgotos (LexState *ls, Labeldesc *lb) {
   Labellist *gl = &ls->dyd->gt;
   int i = ls->fs->bl->firstgoto;
   while (i < gl->n) {
-    if (eqstr(gl->arr[i].name, lb->name))
+    if (luaS_eqstr(gl->arr[i].name, lb->name))
       closegoto(ls, i, lb);
     else
       i++;
@@ -408,7 +412,7 @@ static void findgotos (LexState *ls, Labeldesc *lb) {
 
 
 /*
-** export pending gotos to outer level, to check them against
+** "export" pending gotos to outer level, to check them against
 ** outer labels; if the block being exited has upvalues, and
 ** the goto exits the scope of any variable (which can be the
 ** upvalue), close those variables being exited.
@@ -444,7 +448,7 @@ static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isloop) {
 
 
 /*
-** create a label named 'break' to resolve break statements
+** create a label named "break" to resolve break statements
 */
 static void breaklabel (LexState *ls) {
   TString *n = luaS_new(ls->L, "break");
@@ -459,7 +463,7 @@ static void breaklabel (LexState *ls) {
 static l_noret undefgoto (LexState *ls, Labeldesc *gt) {
   const char *msg = isreserved(gt->name)
                     ? "<%s> at line %d not inside a loop"
-                    : "no visible label '%s' for <goto> at line %d";
+                    : "no visible label " LUA_QS " for <goto> at line %d";
   msg = luaO_pushfstring(ls->L, msg, getstr(gt->name), gt->line);
   semerror(ls, msg);
 }
@@ -521,6 +525,7 @@ static void codeclosure (LexState *ls, expdesc *v) {
 
 
 static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
+  lua_State *L = ls->L;
   Proto *f;
   fs->prev = ls->fs;  /* linked list of funcstates */
   fs->ls = ls;
@@ -539,6 +544,10 @@ static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
   f = fs->f;
   f->source = ls->source;
   f->maxstacksize = 2;  /* registers 0/1 are always valid */
+  fs->h = luaH_new(L);
+  /* anchor table of constants (to avoid being collected) */
+  sethvalue2s(L, L->top, fs->h);
+  incr_top(L);
   enterblock(fs, bl, 0);
 }
 
@@ -563,6 +572,9 @@ static void close_func (LexState *ls) {
   f->sizeupvalues = fs->nups;
   lua_assert(fs->bl == NULL);
   ls->fs = fs->prev;
+  /* last token read was anchored in defunct function; must re-anchor it */
+  anchor_token(ls);
+  L->top--;  /* pop table of constants */
   luaC_checkGC(L);
 }
 
@@ -576,7 +588,7 @@ static void close_func (LexState *ls) {
 /*
 ** check whether current token is in the follow set of a block.
 ** 'until' closes syntactical blocks, but do not close scope,
-** so it is handled in separate.
+** so it handled in separate.
 */
 static int block_follow (LexState *ls, int withuntil) {
   switch (ls->t.token) {
@@ -590,7 +602,7 @@ static int block_follow (LexState *ls, int withuntil) {
 
 
 static void statlist (LexState *ls) {
-  /* statlist -> { stat [';'] } */
+  /* statlist -> { stat [`;'] } */
   while (!block_follow(ls, 1)) {
     if (ls->t.token == TK_RETURN) {
       statement(ls);
@@ -631,14 +643,14 @@ static void yindex (LexState *ls, expdesc *v) {
 struct ConsControl {
   expdesc v;  /* last list item read */
   expdesc *t;  /* table descriptor */
-  int nh;  /* total number of 'record' elements */
+  int nh;  /* total number of `record' elements */
   int na;  /* total number of array elements */
   int tostore;  /* number of array elements pending to be stored */
 };
 
 
 static void recfield (LexState *ls, struct ConsControl *cc) {
-  /* recfield -> (NAME | '['exp1']') = exp1 */
+  /* recfield -> (NAME | `['exp1`]') = exp1 */
   FuncState *fs = ls->fs;
   int reg = ls->fs->freereg;
   expdesc key, val;
@@ -745,12 +757,12 @@ static void constructor (LexState *ls, expdesc *t) {
 
 
 static void parlist (LexState *ls) {
-  /* parlist -> [ param { ',' param } ] */
+  /* parlist -> [ param { `,' param } ] */
   FuncState *fs = ls->fs;
   Proto *f = fs->f;
   int nparams = 0;
   f->is_vararg = 0;
-  if (ls->t.token != ')') {  /* is 'parlist' not empty? */
+  if (ls->t.token != ')') {  /* is `parlist' not empty? */
     do {
       switch (ls->t.token) {
         case TK_NAME: {  /* param -> NAME */
@@ -758,12 +770,12 @@ static void parlist (LexState *ls) {
           nparams++;
           break;
         }
-        case TK_DOTS: {  /* param -> '...' */
+        case TK_DOTS: {  /* param -> `...' */
           luaX_next(ls);
-          f->is_vararg = 2;  /* declared vararg */
+          f->is_vararg = 1;
           break;
         }
-        default: luaX_syntaxerror(ls, "<name> or '...' expected");
+        default: luaX_syntaxerror(ls, "<name> or " LUA_QL("...") " expected");
       }
     } while (!f->is_vararg && testnext(ls, ','));
   }
@@ -774,7 +786,7 @@ static void parlist (LexState *ls) {
 
 
 static void body (LexState *ls, expdesc *e, int ismethod, int line) {
-  /* body ->  '(' parlist ')' block END */
+  /* body ->  `(' parlist `)' block END */
   FuncState new_fs;
   BlockCnt bl;
   new_fs.f = addprototype(ls);
@@ -796,7 +808,7 @@ static void body (LexState *ls, expdesc *e, int ismethod, int line) {
 
 
 static int explist (LexState *ls, expdesc *v) {
-  /* explist -> expr { ',' expr } */
+  /* explist -> expr { `,' expr } */
   int n = 1;  /* at least one expression */
   expr(ls, v);
   while (testnext(ls, ',')) {
@@ -813,7 +825,7 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
   expdesc args;
   int base, nparams;
   switch (ls->t.token) {
-    case '(': {  /* funcargs -> '(' [ explist ] ')' */
+    case '(': {  /* funcargs -> `(' [ explist ] `)' */
       luaX_next(ls);
       if (ls->t.token == ')')  /* arg list is empty? */
         args.k = VVOID;
@@ -830,7 +842,7 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
     }
     case TK_STRING: {  /* funcargs -> STRING */
       codestring(ls, &args, ls->t.seminfo.ts);
-      luaX_next(ls);  /* must use 'seminfo' before 'next' */
+      luaX_next(ls);  /* must use `seminfo' before `next' */
       break;
     }
     default: {
@@ -896,14 +908,14 @@ static void suffixedexp (LexState *ls, expdesc *v) {
         fieldsel(ls, v);
         break;
       }
-      case '[': {  /* '[' exp1 ']' */
+      case '[': {  /* `[' exp1 `]' */
         expdesc key;
         luaK_exp2anyregup(fs, v);
         yindex(ls, &key);
         luaK_indexed(fs, v, &key);
         break;
       }
-      case ':': {  /* ':' NAME funcargs */
+      case ':': {  /* `:' NAME funcargs */
         expdesc key;
         luaX_next(ls);
         checkname(ls, &key);
@@ -923,19 +935,14 @@ static void suffixedexp (LexState *ls, expdesc *v) {
 
 
 static void simpleexp (LexState *ls, expdesc *v) {
-  /* simpleexp -> FLT | INT | STRING | NIL | TRUE | FALSE | ... |
+  /* simpleexp -> NUMBER | STRING | NIL | TRUE | FALSE | ... |
                   constructor | FUNCTION body | suffixedexp */
   switch (ls->t.token) {
-    case TK_FLT: {
-      init_exp(v, VKFLT, 0);
+    case TK_NUMBER: {
+      init_exp(v, VKNUM, 0);
       v->u.nval = ls->t.seminfo.r;
       break;
     }
-    case TK_INT: {
-      init_exp(v, VKINT, 0);
-      v->u.ival = ls->t.seminfo.i;
-      break;
-    }
     case TK_STRING: {
       codestring(ls, v, ls->t.seminfo.ts);
       break;
@@ -955,8 +962,7 @@ static void simpleexp (LexState *ls, expdesc *v) {
     case TK_DOTS: {  /* vararg */
       FuncState *fs = ls->fs;
       check_condition(ls, fs->f->is_vararg,
-                      "cannot use '...' outside a vararg function");
-      fs->f->is_vararg = 1;  /* function actually uses vararg */
+                      "cannot use " LUA_QL("...") " outside a vararg function");
       init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0));
       break;
     }
@@ -982,7 +988,6 @@ static UnOpr getunopr (int op) {
   switch (op) {
     case TK_NOT: return OPR_NOT;
     case '-': return OPR_MINUS;
-    case '~': return OPR_BNOT;
     case '#': return OPR_LEN;
     default: return OPR_NOUNOPR;
   }
@@ -994,15 +999,9 @@ static BinOpr getbinopr (int op) {
     case '+': return OPR_ADD;
     case '-': return OPR_SUB;
     case '*': return OPR_MUL;
+    case '/': return OPR_DIV;
     case '%': return OPR_MOD;
     case '^': return OPR_POW;
-    case '/': return OPR_DIV;
-    case TK_IDIV: return OPR_IDIV;
-    case '&': return OPR_BAND;
-    case '|': return OPR_BOR;
-    case '~': return OPR_BXOR;
-    case TK_SHL: return OPR_SHL;
-    case TK_SHR: return OPR_SHR;
     case TK_CONCAT: return OPR_CONCAT;
     case TK_NE: return OPR_NE;
     case TK_EQ: return OPR_EQ;
@@ -1021,24 +1020,19 @@ static const struct {
   lu_byte left;  /* left priority for each binary operator */
   lu_byte right; /* right priority */
 } priority[] = {  /* ORDER OPR */
-   {10, 10}, {10, 10},           /* '+' '-' */
-   {11, 11}, {11, 11},           /* '*' '%' */
-   {14, 13},                  /* '^' (right associative) */
-   {11, 11}, {11, 11},           /* '/' '//' */
-   {6, 6}, {4, 4}, {5, 5},   /* '&' '|' '~' */
-   {7, 7}, {7, 7},           /* '<<' '>>' */
-   {9, 8},                   /* '..' (right associative) */
-   {3, 3}, {3, 3}, {3, 3},   /* ==, <, <= */
-   {3, 3}, {3, 3}, {3, 3},   /* ~=, >, >= */
-   {2, 2}, {1, 1}            /* and, or */
+   {6, 6}, {6, 6}, {7, 7}, {7, 7}, {7, 7},  /* `+' `-' `*' `/' `%' */
+   {10, 9}, {5, 4},                 /* ^, .. (right associative) */
+   {3, 3}, {3, 3}, {3, 3},          /* ==, <, <= */
+   {3, 3}, {3, 3}, {3, 3},          /* ~=, >, >= */
+   {2, 2}, {1, 1}                   /* and, or */
 };
 
-#define UNARY_PRIORITY	12  /* priority for unary operators */
+#define UNARY_PRIORITY	8  /* priority for unary operators */
 
 
 /*
 ** subexpr -> (simpleexp | unop subexpr) { binop subexpr }
-** where 'binop' is any binary operator with a priority higher than 'limit'
+** where `binop' is any binary operator with a priority higher than `limit'
 */
 static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
   BinOpr op;
@@ -1052,7 +1046,7 @@ static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
     luaK_prefix(ls->fs, uop, v, line);
   }
   else simpleexp(ls, v);
-  /* expand while operators have priorities higher than 'limit' */
+  /* expand while operators have priorities higher than `limit' */
   op = getbinopr(ls->t.token);
   while (op != OPR_NOBINOPR && priority[op].left > limit) {
     expdesc v2;
@@ -1152,7 +1146,7 @@ static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
                     "C levels");
     assignment(ls, &nv, nvars+1);
   }
-  else {  /* assignment -> '=' explist */
+  else {  /* assignment -> `=' explist */
     int nexps;
     checknext(ls, '=');
     nexps = explist(ls, &e);
@@ -1176,7 +1170,7 @@ static int cond (LexState *ls) {
   /* cond -> exp */
   expdesc v;
   expr(ls, &v);  /* read condition */
-  if (v.k == VNIL) v.k = VFALSE;  /* 'falses' are all equal here */
+  if (v.k == VNIL) v.k = VFALSE;  /* `falses' are all equal here */
   luaK_goiftrue(ls->fs, &v);
   return v.f;
 }
@@ -1201,9 +1195,9 @@ static void gotostat (LexState *ls, int pc) {
 static void checkrepeated (FuncState *fs, Labellist *ll, TString *label) {
   int i;
   for (i = fs->bl->firstlabel; i < ll->n; i++) {
-    if (eqstr(label, ll->arr[i].name)) {
+    if (luaS_eqstr(label, ll->arr[i].name)) {
       const char *msg = luaO_pushfstring(fs->ls->L,
-                          "label '%s' already defined on line %d",
+                          "label " LUA_QS " already defined on line %d",
                           getstr(label), ll->arr[i].line);
       semerror(fs->ls, msg);
     }
@@ -1327,7 +1321,7 @@ static void fornum (LexState *ls, TString *varname, int line) {
   if (testnext(ls, ','))
     exp1(ls);  /* optional step */
   else {  /* default step = 1 */
-    luaK_codek(fs, fs->freereg, luaK_intK(fs, 1));
+    luaK_codek(fs, fs->freereg, luaK_numberK(fs, 1));
     luaK_reserveregs(fs, 1);
   }
   forbody(ls, base, line, 1, 1);
@@ -1365,15 +1359,15 @@ static void forstat (LexState *ls, int line) {
   TString *varname;
   BlockCnt bl;
   enterblock(fs, &bl, 1);  /* scope for loop and control variables */
-  luaX_next(ls);  /* skip 'for' */
+  luaX_next(ls);  /* skip `for' */
   varname = str_checkname(ls);  /* first variable name */
   switch (ls->t.token) {
     case '=': fornum(ls, varname, line); break;
     case ',': case TK_IN: forlist(ls, varname); break;
-    default: luaX_syntaxerror(ls, "'=' or 'in' expected");
+    default: luaX_syntaxerror(ls, LUA_QL("=") " or " LUA_QL("in") " expected");
   }
   check_match(ls, TK_END, TK_FOR, line);
-  leaveblock(fs);  /* loop scope ('break' jumps to this point) */
+  leaveblock(fs);  /* loop scope (`break' jumps to this point) */
 }
 
 
@@ -1403,7 +1397,7 @@ static void test_then_block (LexState *ls, int *escapelist) {
     enterblock(fs, &bl, 0);
     jf = v.f;
   }
-  statlist(ls);  /* 'then' part */
+  statlist(ls);  /* `then' part */
   leaveblock(fs);
   if (ls->t.token == TK_ELSE ||
       ls->t.token == TK_ELSEIF)  /* followed by 'else'/'elseif'? */
@@ -1420,7 +1414,7 @@ static void ifstat (LexState *ls, int line) {
   while (ls->t.token == TK_ELSEIF)
     test_then_block(ls, &escapelist);  /* ELSEIF cond THEN block */
   if (testnext(ls, TK_ELSE))
-    block(ls);  /* 'else' part */
+    block(ls);  /* `else' part */
   check_match(ls, TK_END, TK_IF, line);
   luaK_patchtohere(fs, escapelist);  /* patch escape list to 'if' end */
 }
@@ -1438,7 +1432,7 @@ static void localfunc (LexState *ls) {
 
 
 static void localstat (LexState *ls) {
-  /* stat -> LOCAL NAME {',' NAME} ['=' explist] */
+  /* stat -> LOCAL NAME {`,' NAME} [`=' explist] */
   int nvars = 0;
   int nexps;
   expdesc e;
@@ -1458,7 +1452,7 @@ static void localstat (LexState *ls) {
 
 
 static int funcname (LexState *ls, expdesc *v) {
-  /* funcname -> NAME {fieldsel} [':' NAME] */
+  /* funcname -> NAME {fieldsel} [`:' NAME] */
   int ismethod = 0;
   singlevar(ls, v);
   while (ls->t.token == '.')
@@ -1479,7 +1473,7 @@ static void funcstat (LexState *ls, int line) {
   ismethod = funcname(ls, &v);
   body(ls, &b, ismethod, line);
   luaK_storevar(ls->fs, &v, &b);
-  luaK_fixline(ls->fs, line);  /* definition "happens" in the first line */
+  luaK_fixline(ls->fs, line);  /* definition `happens' in the first line */
 }
 
 
@@ -1521,8 +1515,8 @@ static void retstat (LexState *ls) {
       if (nret == 1)  /* only one single value? */
         first = luaK_exp2anyreg(fs, &e);
       else {
-        luaK_exp2nextreg(fs, &e);  /* values must go to the stack */
-        first = fs->nactvar;  /* return all active values */
+        luaK_exp2nextreg(fs, &e);  /* values must go to the `stack' */
+        first = fs->nactvar;  /* return all `active' values */
         lua_assert(nret == fs->freereg - first);
       }
     }
@@ -1611,7 +1605,7 @@ static void mainfunc (LexState *ls, FuncState *fs) {
   BlockCnt bl;
   expdesc v;
   open_func(ls, fs, &bl);
-  fs->f->is_vararg = 2;  /* main function is always declared vararg */
+  fs->f->is_vararg = 1;  /* main function is always vararg */
   init_exp(&v, VLOCAL, 0);  /* create and... */
   newupvalue(fs, ls->envn, &v);  /* ...set environment upvalue */
   luaX_next(ls);  /* read first token */
@@ -1621,19 +1615,16 @@ static void mainfunc (LexState *ls, FuncState *fs) {
 }
 
 
-LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
-                       Dyndata *dyd, const char *name, int firstchar) {
+Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                      Dyndata *dyd, const char *name, int firstchar) {
   LexState lexstate;
   FuncState funcstate;
-  LClosure *cl = luaF_newLclosure(L, 1);  /* create main closure */
-  setclLvalue(L, L->top, cl);  /* anchor it (to avoid being collected) */
-  luaD_inctop(L);
-  lexstate.h = luaH_new(L);  /* create table for scanner */
-  sethvalue(L, L->top, lexstate.h);  /* anchor it */
-  luaD_inctop(L);
-  funcstate.f = cl->p = luaF_newproto(L);
+  Closure *cl = luaF_newLclosure(L, 1);  /* create main closure */
+  /* anchor closure (to avoid being collected) */
+  setclLvalue(L, L->top, cl);
+  incr_top(L);
+  funcstate.f = cl->l.p = luaF_newproto(L);
   funcstate.f->source = luaS_new(L, name);  /* create and anchor TString */
-  lua_assert(iswhite(funcstate.f));  /* do not need barrier here */
   lexstate.buff = buff;
   lexstate.dyd = dyd;
   dyd->actvar.n = dyd->gt.n = dyd->label.n = 0;
@@ -1642,7 +1633,6 @@ LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
   lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs);
   /* all scopes should be correctly finished */
   lua_assert(dyd->actvar.n == 0 && dyd->gt.n == 0 && dyd->label.n == 0);
-  L->top--;  /* remove scanner's table */
-  return cl;  /* closure is on the stack, too */
+  return cl;  /* it's on the stack too */
 }
 

lparser.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h,v 1.73 2014/06/19 18:27:20 roberto Exp roberto $
+** $Id: lparser.h,v 1.70 2012/05/08 13:53:33 roberto Exp $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -21,9 +21,8 @@ typedef enum {
   VNIL,
   VTRUE,
   VFALSE,
-  VK,		/* info = index of constant in 'k' */
-  VKFLT,	/* nval = numerical float value */
-  VKINT,	/* nval = numerical integer value */
+  VK,		/* info = index of constant in `k' */
+  VKNUM,	/* nval = numerical value */
   VNONRELOC,	/* info = result register */
   VLOCAL,	/* info = local register */
   VUPVAL,       /* info = index of upvalue in 'upvalues' */
@@ -47,11 +46,10 @@ typedef struct expdesc {
       lu_byte vt;  /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
     } ind;
     int info;  /* for generic use */
-    lua_Number nval;  /* for VKFLT */
-    lua_Integer ival;    /* for VKINT */
+    lua_Number nval;  /* for VKNUM */
   } u;
-  int t;  /* patch list of 'exit when true' */
-  int f;  /* patch list of 'exit when false' */
+  int t;  /* patch list of `exit when true' */
+  int f;  /* patch list of `exit when false' */
 } expdesc;
 
 
@@ -97,14 +95,15 @@ struct BlockCnt;  /* defined in lparser.c */
 /* state needed to generate code for a given function */
 typedef struct FuncState {
   Proto *f;  /* current function header */
+  Table *h;  /* table to find (and reuse) elements in `k' */
   struct FuncState *prev;  /* enclosing function */
   struct LexState *ls;  /* lexical state */
   struct BlockCnt *bl;  /* chain of current blocks */
-  int pc;  /* next position to code (equivalent to 'ncode') */
+  int pc;  /* next position to code (equivalent to `ncode') */
   int lasttarget;   /* 'label' of last 'jump label' */
-  int jpc;  /* list of pending jumps to 'pc' */
-  int nk;  /* number of elements in 'k' */
-  int np;  /* number of elements in 'p' */
+  int jpc;  /* list of pending jumps to `pc' */
+  int nk;  /* number of elements in `k' */
+  int np;  /* number of elements in `p' */
   int firstlocal;  /* index of first local var (in Dyndata array) */
   short nlocvars;  /* number of elements in 'f->locvars' */
   lu_byte nactvar;  /* number of active local variables */
@@ -113,8 +112,8 @@ typedef struct FuncState {
 } FuncState;
 
 
-LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
-                                 Dyndata *dyd, const char *name, int firstchar);
+LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                                Dyndata *dyd, const char *name, int firstchar);
 
 
 #endif

lprefix.h

@@ -1,45 +0,0 @@
-/*
-** $Id: lprefix.h,v 1.1 2014/11/03 15:12:44 roberto Exp roberto $
-** Definitions for Lua code that must come before any other header file
-** See Copyright Notice in lua.h
-*/
-
-#ifndef lprefix_h
-#define lprefix_h
-
-
-/*
-** Allows POSIX/XSI stuff
-*/
-#if !defined(LUA_USE_C89)	/* { */
-
-#if !defined(_XOPEN_SOURCE)
-#define _XOPEN_SOURCE           600
-#elif _XOPEN_SOURCE == 0
-#undef _XOPEN_SOURCE  /* use -D_XOPEN_SOURCE=0 to undefine it */
-#endif
-
-/*
-** Allows manipulation of large files in gcc and some other compilers
-*/
-#if !defined(LUA_32BITS) && !defined(_FILE_OFFSET_BITS)
-#define _LARGEFILE_SOURCE       1
-#define _FILE_OFFSET_BITS       64
-#endif
-
-#endif				/* } */
-
-
-/*
-** Windows stuff
-*/
-#if defined(_WIN32) 	/* { */
-
-#if !defined(_CRT_SECURE_NO_WARNINGS)
-#define _CRT_SECURE_NO_WARNINGS  /* avoid warnings about ISO C functions */
-#endif
-
-#endif			/* } */
-
-#endif
-

lstate.c

@@ -1,18 +1,16 @@
 /*
-** $Id: lstate.c,v 2.132 2015/11/02 16:01:41 roberto Exp roberto $
+** $Id: lstate.c,v 2.99.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
 
-#define lstate_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <stddef.h>
 #include <string.h>
 
+#define lstate_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "lapi.h"
@@ -32,11 +30,18 @@
 #define LUAI_GCPAUSE	200  /* 200% */
 #endif
 
+#if !defined(LUAI_GCMAJOR)
+#define LUAI_GCMAJOR	200  /* 200% */
+#endif
+
 #if !defined(LUAI_GCMUL)
 #define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
 #endif
 
 
+#define MEMERRMSG	"not enough memory"
+
+
 /*
 ** a macro to help the creation of a unique random seed when a state is
 ** created; the seed is used to randomize hashes.
@@ -52,7 +57,9 @@
 ** thread state + extra space
 */
 typedef struct LX {
-  lu_byte extra_[LUA_EXTRASPACE];
+#if defined(LUAI_EXTRASPACE)
+  char buff[LUAI_EXTRASPACE];
+#endif
   lua_State l;
 } LX;
 
@@ -71,12 +78,13 @@ typedef struct LG {
 
 
 /*
-** Compute an initial seed as random as possible. Rely on Address Space
-** Layout Randomization (if present) to increase randomness..
+** Compute an initial seed as random as possible. In ANSI, rely on
+** Address Space Layout Randomization (if present) to increase
+** randomness..
 */
 #define addbuff(b,p,e) \
   { size_t t = cast(size_t, e); \
-    memcpy(b + p, &t, sizeof(t)); p += sizeof(t); }
+    memcpy(buff + p, &t, sizeof(t)); p += sizeof(t); }
 
 static unsigned int makeseed (lua_State *L) {
   char buff[4 * sizeof(size_t)];
@@ -93,14 +101,10 @@ static unsigned int makeseed (lua_State *L) {
 
 /*
 ** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
-** invariant (and avoiding underflows in 'totalbytes')
+** invariant
 */
 void luaE_setdebt (global_State *g, l_mem debt) {
-  l_mem tb = gettotalbytes(g);
-  lua_assert(tb > 0);
-  if (debt < tb - MAX_LMEM)
-    debt = tb - MAX_LMEM;  /* will make 'totalbytes == MAX_LMEM' */
-  g->totalbytes = tb - debt;
+  g->totalbytes -= (debt - g->GCdebt);
   g->GCdebt = debt;
 }
 
@@ -111,14 +115,10 @@ CallInfo *luaE_extendCI (lua_State *L) {
   L->ci->next = ci;
   ci->previous = L->ci;
   ci->next = NULL;
-  L->nci++;
   return ci;
 }
 
 
-/*
-** free all CallInfo structures not in use by a thread
-*/
 void luaE_freeCI (lua_State *L) {
   CallInfo *ci = L->ci;
   CallInfo *next = ci->next;
@@ -126,24 +126,6 @@ void luaE_freeCI (lua_State *L) {
   while ((ci = next) != NULL) {
     next = ci->next;
     luaM_free(L, ci);
-    L->nci--;
-  }
-}
-
-
-/*
-** free half of the CallInfo structures not in use by a thread
-*/
-void luaE_shrinkCI (lua_State *L) {
-  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--;
-    ci->next = next2;  /* remove 'next' from the list */
-    next2->previous = ci;
-    ci = next2;  /* keep next's next */
   }
 }
 
@@ -173,7 +155,6 @@ static void freestack (lua_State *L) {
     return;  /* stack not completely built yet */
   L->ci = &L->base_ci;  /* free the entire 'ci' list */
   luaE_freeCI(L);
-  lua_assert(L->nci == 0);
   luaM_freearray(L, L->stack, L->stacksize);  /* free stack array */
 }
 
@@ -182,32 +163,34 @@ 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;
+  TValue mt;
   /* 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, &temp, L);  /* temp = L */
-  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &temp);
+  setthvalue(L, &mt, L);
+  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &mt);
   /* 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);
+  sethvalue(L, &mt, luaH_new(L));
+  luaH_setint(L, registry, LUA_RIDX_GLOBALS, &mt);
 }
 
 
 /*
-** open parts of the state that may cause memory-allocation errors.
-** ('g->version' != NULL flags that the state was completely build)
+** open parts of the state that may cause memory-allocation errors
 */
 static void f_luaopen (lua_State *L, void *ud) {
   global_State *g = G(L);
   UNUSED(ud);
   stack_init(L, L);  /* init stack */
   init_registry(L, g);
-  luaS_init(L);
+  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */
   luaT_init(L);
   luaX_init(L);
+  /* pre-create memory-error message */
+  g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
+  luaS_fix(g->memerrmsg);  /* it should never be collected */
   g->gcrunning = 1;  /* allow gc */
   g->version = lua_version(NULL);
   luai_userstateopen(L);
@@ -215,16 +198,14 @@ static void f_luaopen (lua_State *L, void *ud) {
 
 
 /*
-** preinitialize a thread with consistent values without allocating
+** preinitialize a state with consistent values without allocating
 ** any memory (to avoid errors)
 */
-static void preinit_thread (lua_State *L, global_State *g) {
+static void preinit_state (lua_State *L, global_State *g) {
   G(L) = g;
   L->stack = NULL;
   L->ci = NULL;
-  L->nci = 0;
   L->stacksize = 0;
-  L->twups = L;  /* thread has no upvalues */
   L->errorJmp = NULL;
   L->nCcalls = 0;
   L->hook = NULL;
@@ -246,6 +227,7 @@ static void close_state (lua_State *L) {
   if (g->version)  /* closing a fully built state? */
     luai_userstateclose(L);
   luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
+  luaZ_freebuffer(L, &g->buff);
   freestack(L);
   lua_assert(gettotalbytes(g) == sizeof(LG));
   (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0);  /* free main block */
@@ -253,28 +235,17 @@ static void close_state (lua_State *L) {
 
 
 LUA_API lua_State *lua_newthread (lua_State *L) {
-  global_State *g = G(L);
   lua_State *L1;
   lua_lock(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_TTHREAD;
-  /* link it on list 'allgc' */
-  L1->next = g->allgc;
-  g->allgc = obj2gco(L1);
-  /* anchor it on L stack */
+  L1 = &luaC_newobj(L, LUA_TTHREAD, sizeof(LX), NULL, offsetof(LX, l))->th;
   setthvalue(L, L->top, L1);
   api_incr_top(L);
-  preinit_thread(L1, g);
+  preinit_state(L1, G(L));
   L1->hookmask = L->hookmask;
   L1->basehookcount = L->basehookcount;
   L1->hook = L->hook;
   resethookcount(L1);
-  /* initialize L1 extra space */
-  memcpy(lua_getextraspace(L1), lua_getextraspace(g->mainthread),
-         LUA_EXTRASPACE);
   luai_userstatethread(L, L1);
   stack_init(L1, L);  /* init stack */
   lua_unlock(L);
@@ -302,31 +273,36 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   g = &l->g;
   L->next = NULL;
   L->tt = LUA_TTHREAD;
-  g->currentwhite = bitmask(WHITE0BIT);
+  g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
   L->marked = luaC_white(g);
-  preinit_thread(L, g);
+  g->gckind = KGC_NORMAL;
+  preinit_state(L, g);
   g->frealloc = f;
   g->ud = ud;
   g->mainthread = L;
   g->seed = makeseed(L);
+  g->uvhead.u.l.prev = &g->uvhead;
+  g->uvhead.u.l.next = &g->uvhead;
   g->gcrunning = 0;  /* no GC while building state */
   g->GCestimate = 0;
-  g->strt.size = g->strt.nuse = 0;
+  g->strt.size = 0;
+  g->strt.nuse = 0;
   g->strt.hash = NULL;
   setnilvalue(&g->l_registry);
+  luaZ_initbuffer(L, &g->buff);
   g->panic = NULL;
   g->version = NULL;
   g->gcstate = GCSpause;
-  g->gckind = KGC_NORMAL;
-  g->allgc = g->finobj = g->tobefnz = g->fixedgc = NULL;
-  g->sweepgc = NULL;
+  g->allgc = NULL;
+  g->finobj = NULL;
+  g->tobefnz = NULL;
+  g->sweepgc = g->sweepfin = NULL;
   g->gray = g->grayagain = NULL;
   g->weak = g->ephemeron = g->allweak = NULL;
-  g->twups = NULL;
   g->totalbytes = sizeof(LG);
   g->GCdebt = 0;
-  g->gcfinnum = 0;
   g->gcpause = LUAI_GCPAUSE;
+  g->gcmajorinc = LUAI_GCMAJOR;
   g->gcstepmul = LUAI_GCMUL;
   for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
   if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.127 2015/11/02 16:01:41 roberto Exp roberto $
+** $Id: lstate.h,v 2.82 2012/07/02 13:37:04 roberto Exp $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -16,16 +16,25 @@
 
 /*
 
-** 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
-** the 'CommonHeader' for the link:
+** Some notes about garbage-collected objects:  All objects in Lua must
+** be kept somehow accessible until being freed.
 **
-** 'allgc': all objects not marked for finalization;
-** 'finobj': all objects marked for finalization;
-** 'tobefnz': all objects ready to be finalized; 
-** 'fixedgc': all objects that are not to be collected (currently
-** only small strings, such as reserved words).
+** Lua keeps most objects linked in list g->allgc. The link uses field
+** 'next' of the CommonHeader.
+**
+** Strings are kept in several lists headed by the array g->strt.hash.
+**
+** Open upvalues are not subject to independent garbage collection. They
+** are collected together with their respective threads. Lua keeps a
+** double-linked list with all open upvalues (g->uvhead) so that it can
+** mark objects referred by them. (They are always gray, so they must
+** be remarked in the atomic step. Usually their contents would be marked
+** when traversing the respective threads, but the thread may already be
+** dead, while the upvalue is still accessible through closures.)
+**
+** Objects with finalizers are kept in the list g->finobj.
+**
+** The list g->tobefnz links all objects being finalized.
 
 */
 
@@ -44,72 +53,66 @@ struct lua_longjmp;  /* defined in ldo.c */
 /* kinds of Garbage Collection */
 #define KGC_NORMAL	0
 #define KGC_EMERGENCY	1	/* gc was forced by an allocation failure */
+#define KGC_GEN		2	/* generational collection */
 
 
 typedef struct stringtable {
-  TString **hash;
-  int nuse;  /* number of elements */
+  GCObject **hash;
+  lu_int32 nuse;  /* number of elements */
   int size;
 } stringtable;
 
 
 /*
-** Information about a call.
-** 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.
+** information about a call
 */
 typedef struct CallInfo {
   StkId func;  /* function index in the stack */
   StkId	top;  /* top for this function */
   struct CallInfo *previous, *next;  /* dynamic call link */
+  short nresults;  /* expected number of results from this function */
+  lu_byte callstatus;
+  ptrdiff_t extra;
   union {
     struct {  /* only for Lua functions */
       StkId base;  /* base for this function */
       const Instruction *savedpc;
     } l;
     struct {  /* only for C functions */
-      lua_KFunction k;  /* continuation in case of yields */
+      int ctx;  /* context info. in case of yields */
+      lua_CFunction k;  /* continuation in case of yields */
       ptrdiff_t old_errfunc;
-      lua_KContext ctx;  /* context info. in case of yields */
+      lu_byte old_allowhook;
+      lu_byte status;
     } c;
   } u;
-  ptrdiff_t extra;
-  short nresults;  /* expected number of results from this function */
-  lu_byte callstatus;
 } CallInfo;
 
 
 /*
 ** Bits in CallInfo status
 */
-#define CIST_OAH	(1<<0)	/* original value of 'allowhook' */
-#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_LUA	(1<<0)	/* call is running a Lua function */
+#define CIST_HOOKED	(1<<1)	/* call is running a debug hook */
+#define CIST_REENTRY	(1<<2)	/* call is running on same invocation of
+                                   luaV_execute of previous call */
+#define CIST_YIELDED	(1<<3)	/* call reentered after suspension */
 #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_LEQ	(1<<7)  /* using __lt for __le */
+#define CIST_STAT	(1<<5)	/* call has an error status (pcall) */
+#define CIST_TAIL	(1<<6)	/* call was tail called */
+#define CIST_HOOKYIELD	(1<<7)	/* last hook called yielded */
+
 
 #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))
-#define getoah(st)	((st) & CIST_OAH)
-
 
 /*
-** 'global state', shared by all threads of this state
+** `global state', shared by all threads of this state
 */
 typedef struct global_State {
   lua_Alloc frealloc;  /* function to reallocate memory */
-  void *ud;         /* auxiliary data to 'frealloc' */
-  l_mem totalbytes;  /* number of bytes currently allocated - GCdebt */
+  void *ud;         /* auxiliary data to `frealloc' */
+  lu_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 */
@@ -120,36 +123,36 @@ typedef struct global_State {
   lu_byte gcstate;  /* state of garbage collector */
   lu_byte gckind;  /* kind of GC running */
   lu_byte gcrunning;  /* true if GC is running */
+  int sweepstrgc;  /* position of sweep in `strt' */
   GCObject *allgc;  /* list of all collectable objects */
-  GCObject **sweepgc;  /* current position of sweep in list */
   GCObject *finobj;  /* list of collectable objects with finalizers */
+  GCObject **sweepgc;  /* current position of sweep in list 'allgc' */
+  GCObject **sweepfin;  /* current position of sweep in list 'finobj' */
   GCObject *gray;  /* list of gray objects */
   GCObject *grayagain;  /* list of objects to be traversed atomically */
   GCObject *weak;  /* list of tables with weak values */
   GCObject *ephemeron;  /* list of ephemeron tables (weak keys) */
   GCObject *allweak;  /* list of all-weak tables */
   GCObject *tobefnz;  /* list of userdata to be GC */
-  GCObject *fixedgc;  /* list of objects not to be collected */
-  struct lua_State *twups;  /* list of threads with open upvalues */
-  unsigned int gcfinnum;  /* number of finalizers to call in each GC step */
+  UpVal uvhead;  /* head of double-linked list of all open upvalues */
+  Mbuffer buff;  /* temporary buffer for string concatenation */
   int gcpause;  /* size of pause between successive GCs */
-  int gcstepmul;  /* GC 'granularity' */
+  int gcmajorinc;  /* pause between major collections (only in gen. mode) */
+  int gcstepmul;  /* GC `granularity' */
   lua_CFunction panic;  /* to be called in unprotected errors */
   struct lua_State *mainthread;
   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 */
 } global_State;
 
 
 /*
-** 'per thread' state
+** `per thread' state
 */
 struct lua_State {
   CommonHeader;
-  unsigned short nci;  /* number of items in 'ci' list */
   lu_byte status;
   StkId top;  /* first free slot in the stack */
   global_State *l_G;
@@ -157,20 +160,19 @@ struct lua_State {
   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 */
-  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) */
-  lua_Hook hook;
-  ptrdiff_t errfunc;  /* current error handling function (stack index) */
   int stacksize;
-  int basehookcount;
-  int hookcount;
   unsigned short nny;  /* number of non-yieldable calls in stack */
   unsigned short nCcalls;  /* number of nested C calls */
   lu_byte hookmask;
   lu_byte allowhook;
+  int basehookcount;
+  int hookcount;
+  lua_Hook hook;
+  GCObject *openupval;  /* list of open upvalues in this stack */
+  GCObject *gclist;
+  struct lua_longjmp *errorJmp;  /* current error recover point */
+  ptrdiff_t errfunc;  /* current error handling function (stack index) */
+  CallInfo base_ci;  /* CallInfo for first level (C calling Lua) */
 };
 
 
@@ -178,47 +180,48 @@ struct lua_State {
 
 
 /*
-** Union of all collectable objects (only for conversions)
+** Union of all collectable objects
 */
-union GCUnion {
-  GCObject gc;  /* common header */
-  struct TString ts;
-  struct Udata u;
+union GCObject {
+  GCheader gch;  /* common header */
+  union TString ts;
+  union Udata u;
   union Closure cl;
   struct Table h;
   struct Proto p;
+  struct UpVal uv;
   struct lua_State th;  /* thread */
 };
 
 
-#define cast_u(o)	cast(union GCUnion *, (o))
+#define gch(o)		(&(o)->gch)
 
 /* 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_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 rawgco2ts(o)  \
+	check_exp(novariant((o)->gch.tt) == LUA_TSTRING, &((o)->ts))
+#define gco2ts(o)	(&rawgco2ts(o)->tsv)
+#define rawgco2u(o)	check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
+#define gco2u(o)	(&rawgco2u(o)->uv)
+#define gco2lcl(o)	check_exp((o)->gch.tt == LUA_TLCL, &((o)->cl.l))
+#define gco2ccl(o)	check_exp((o)->gch.tt == LUA_TCCL, &((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_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))
+	check_exp(novariant((o)->gch.tt) == LUA_TFUNCTION, &((o)->cl))
+#define gco2t(o)	check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
+#define gco2p(o)	check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
+#define gco2uv(o)	check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
+#define gco2th(o)	check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
 
-
-/* macro to convert a Lua object into a GCObject */
-#define obj2gco(v) \
-	check_exp(novariant((v)->tt) < LUA_TDEADKEY, (&(cast_u(v)->gc)))
+/* macro to convert any Lua object into a GCObject */
+#define obj2gco(v)	(cast(GCObject *, (v)))
 
 
 /* actual number of total bytes allocated */
-#define gettotalbytes(g)	cast(lu_mem, (g)->totalbytes + (g)->GCdebt)
+#define gettotalbytes(g)	((g)->totalbytes + (g)->GCdebt)
 
 LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
 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);
 
 
 #endif

lstring.c

@@ -1,30 +1,23 @@
 /*
-** $Id: lstring.c,v 2.55 2015/11/03 15:36:01 roberto Exp roberto $
+** $Id: lstring.c,v 2.26 2013/01/08 13:50:10 roberto Exp $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
 
-#define lstring_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <string.h>
 
+#define lstring_c
+#define LUA_CORE
+
 #include "lua.h"
 
-#include "ldebug.h"
-#include "ldo.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
 
 
-#define MEMERRMSG       "not enough memory"
-
-
 /*
 ** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to
 ** compute its hash
@@ -38,126 +31,99 @@
 ** equality for long strings
 */
 int luaS_eqlngstr (TString *a, TString *b) {
-  size_t len = a->u.lnglen;
-  lua_assert(a->tt == LUA_TLNGSTR && b->tt == LUA_TLNGSTR);
+  size_t len = a->tsv.len;
+  lua_assert(a->tsv.tt == LUA_TLNGSTR && b->tsv.tt == LUA_TLNGSTR);
   return (a == b) ||  /* same instance or... */
-    ((len == b->u.lnglen) &&  /* equal length and ... */
+    ((len == b->tsv.len) &&  /* equal length and ... */
      (memcmp(getstr(a), getstr(b), len) == 0));  /* equal contents */
 }
 
 
+/*
+** equality for strings
+*/
+int luaS_eqstr (TString *a, TString *b) {
+  return (a->tsv.tt == b->tsv.tt) &&
+         (a->tsv.tt == LUA_TSHRSTR ? eqshrstr(a, b) : luaS_eqlngstr(a, b));
+}
+
+
 unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
   unsigned int h = seed ^ cast(unsigned int, l);
+  size_t l1;
   size_t step = (l >> LUAI_HASHLIMIT) + 1;
-  for (; l >= step; l -= step)
-    h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
+  for (l1 = l; l1 >= step; l1 -= step)
+    h = h ^ ((h<<5) + (h>>2) + cast_byte(str[l1 - 1]));
   return h;
 }
 
 
-unsigned int luaS_hashlongstr (TString *ts) {
-  lua_assert(ts->tt == LUA_TLNGSTR);
-  if (ts->extra == 0) {  /* no hash? */
-    ts->hash = luaS_hash(getstr(ts), ts->u.lnglen, ts->hash);
-    ts->extra = 1;  /* now it has its hash */
-  }
-  return ts->hash;
-}
-
-
 /*
 ** resizes the string table
 */
 void luaS_resize (lua_State *L, int newsize) {
   int i;
   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;
+  /* cannot resize while GC is traversing strings */
+  luaC_runtilstate(L, ~bitmask(GCSsweepstring));
+  if (newsize > tb->size) {
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
+    for (i = tb->size; i < newsize; i++) tb->hash[i] = NULL;
   }
-  for (i = 0; i < tb->size; i++) {  /* rehash */
-    TString *p = tb->hash[i];
+  /* rehash */
+  for (i=0; i<tb->size; i++) {
+    GCObject *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, newsize);  /* new position */
-      p->u.hnext = tb->hash[h];  /* chain it */
+      GCObject *next = gch(p)->next;  /* save next */
+      unsigned int h = lmod(gco2ts(p)->hash, newsize);  /* new position */
+      gch(p)->next = tb->hash[h];  /* chain it */
       tb->hash[h] = p;
-      p = hnext;
+      resetoldbit(p);  /* see MOVE OLD rule */
+      p = next;
     }
   }
-  if (newsize < tb->size) {  /* shrink table if needed */
-    /* vanishing slice should be empty */
+  if (newsize < tb->size) {
+    /* shrinking slice must be empty */
     lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL);
-    luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
   }
   tb->size = newsize;
 }
 
 
-/*
-** Clear API string cache. (Entries cannot be empty, so fill them with
-** a non-collectable string.)
-*/
-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 */
-    }
-}
-
-
-/*
-** Initialize the string table and the string cache
-*/
-void luaS_init (lua_State *L) {
-  global_State *g = G(L);
-  int i, j;
-  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 */
-  for (i = 0; i < STRCACHE_N; i++)  /* fill cache with valid strings */
-    for (j = 0; j < STRCACHE_M; j++)
-      g->strcache[i][j] = g->memerrmsg;
-}
-
-
-
 /*
 ** creates a new string object
 */
-static TString *createstrobj (lua_State *L, size_t l, int tag, unsigned int h) {
+static TString *createstrobj (lua_State *L, const char *str, size_t l,
+                              int tag, unsigned int h, GCObject **list) {
   TString *ts;
-  GCObject *o;
   size_t totalsize;  /* total size of TString object */
-  totalsize = sizelstring(l);
-  o = luaC_newobj(L, tag, totalsize);
-  ts = gco2ts(o);
-  ts->hash = h;
-  ts->extra = 0;
-  getstr(ts)[l] = '\0';  /* ending 0 */
+  totalsize = sizeof(TString) + ((l + 1) * sizeof(char));
+  ts = &luaC_newobj(L, tag, totalsize, list, 0)->ts;
+  ts->tsv.len = l;
+  ts->tsv.hash = h;
+  ts->tsv.extra = 0;
+  memcpy(ts+1, str, l*sizeof(char));
+  ((char *)(ts+1))[l] = '\0';  /* ending 0 */
   return ts;
 }
 
 
-TString *luaS_createlngstrobj (lua_State *L, size_t l) {
-  TString *ts = createstrobj(L, l, LUA_TLNGSTR, G(L)->seed);
-  ts->u.lnglen = l;
-  return ts;
-}
-
-
-void luaS_remove (lua_State *L, TString *ts) {
+/*
+** creates a new short string, inserting it into string table
+*/
+static TString *newshrstr (lua_State *L, const char *str, size_t l,
+                                       unsigned int h) {
+  GCObject **list;  /* (pointer to) list where it will be inserted */
   stringtable *tb = &G(L)->strt;
-  TString **p = &tb->hash[lmod(ts->hash, tb->size)];
-  while (*p != ts)  /* find previous element */
-    p = &(*p)->u.hnext;
-  *p = (*p)->u.hnext;  /* remove element from its list */
-  tb->nuse--;
+  TString *s;
+  if (tb->nuse >= cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
+    luaS_resize(L, tb->size*2);  /* too crowded */
+  list = &tb->hash[lmod(h, tb->size)];
+  s = createstrobj(L, str, l, LUA_TSHRSTR, h, list);
+  tb->nuse++;
+  return s;
 }
 
 
@@ -165,31 +131,22 @@ void luaS_remove (lua_State *L, TString *ts) {
 ** 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;
+  GCObject *o;
   global_State *g = G(L);
   unsigned int h = luaS_hash(str, l, g->seed);
-  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 &&
+  for (o = g->strt.hash[lmod(h, g->strt.size)];
+       o != NULL;
+       o = gch(o)->next) {
+    TString *ts = rawgco2ts(o);
+    if (h == ts->tsv.hash &&
+        l == ts->tsv.len &&
         (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
-      /* found! */
-      if (isdead(g, ts))  /* dead (but not collected yet)? */
-        changewhite(ts);  /* resurrect it */
+      if (isdead(G(L), o))  /* string is dead (but was not collected yet)? */
+        changewhite(o);  /* resurrect it */
       return ts;
     }
   }
-  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_TSHRSTR, h);
-  memcpy(getstr(ts), str, l * sizeof(char));
-  ts->shrlen = cast_byte(l);
-  ts->u.hnext = *list;
-  *list = ts;
-  g->strt.nuse++;
-  return ts;
+  return newshrstr(L, str, l, h);  /* not found; create a new string */
 }
 
 
@@ -200,49 +157,29 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
   if (l <= LUAI_MAXSHORTLEN)  /* short string? */
     return internshrstr(L, str, l);
   else {
-    TString *ts;
-    if (l >= (MAX_SIZE - sizeof(TString))/sizeof(char))
+    if (l + 1 > (MAX_SIZET - sizeof(TString))/sizeof(char))
       luaM_toobig(L);
-    ts = luaS_createlngstrobj(L, l);
-    memcpy(getstr(ts), str, l * sizeof(char));
-    return ts;
+    return createstrobj(L, str, l, LUA_TLNGSTR, G(L)->seed, NULL);
   }
 }
 
 
 /*
-** Create or reuse a zero-terminated string, first checking in the
-** cache (using the string address as a key). The cache can contain
-** only zero-terminated strings, so it is safe to use 'strcmp' to
-** check hits.
+** new zero-terminated string
 */
 TString *luaS_new (lua_State *L, const char *str) {
-  unsigned int i = point2uint(str) % STRCACHE_N;  /* hash */
-  int j;
-  TString **p = G(L)->strcache[i];
-  for (j = 0; j < STRCACHE_M; j++) {
-    if (strcmp(str, getstr(p[j])) == 0)  /* hit? */
-      return p[j];  /* that is it */
-  }
-  /* normal route */
-  for (j = STRCACHE_M - 1; j > 0; j--)
-    p[j] = p[j - 1];  /* move out last element */
-  /* new element is first in the list */
-  p[0] = luaS_newlstr(L, str, strlen(str));
-  return p[0];
+  return luaS_newlstr(L, str, strlen(str));
 }
 
 
-Udata *luaS_newudata (lua_State *L, size_t s) {
+Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
   Udata *u;
-  GCObject *o;
-  if (s > MAX_SIZE - sizeof(Udata))
+  if (s > MAX_SIZET - sizeof(Udata))
     luaM_toobig(L);
-  o = luaC_newobj(L, LUA_TUSERDATA, sizeludata(s));
-  u = gco2u(o);
-  u->len = s;
-  u->metatable = NULL;
-  setuservalue(L, u, luaO_nilobject);
+  u = &luaC_newobj(L, LUA_TUSERDATA, sizeof(Udata) + s, NULL, 0)->u;
+  u->uv.len = s;
+  u->uv.metatable = NULL;
+  u->uv.env = e;
   return u;
 }
 

lstring.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.h,v 1.60 2015/09/08 15:41:05 roberto Exp roberto $
+** $Id: lstring.h,v 1.49 2012/02/01 21:57:15 roberto Exp $
 ** String table (keep all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,38 +12,35 @@
 #include "lstate.h"
 
 
-#define sizelstring(l)  (sizeof(union UTString) + ((l) + 1) * sizeof(char))
+#define sizestring(s)	(sizeof(union TString)+((s)->len+1)*sizeof(char))
 
-#define sizeludata(l)	(sizeof(union UUdata) + (l))
-#define sizeudata(u)	sizeludata((u)->len)
+#define sizeudata(u)	(sizeof(union Udata)+(u)->len)
 
 #define luaS_newliteral(L, s)	(luaS_newlstr(L, "" s, \
                                  (sizeof(s)/sizeof(char))-1))
 
+#define luaS_fix(s)	l_setbit((s)->tsv.marked, FIXEDBIT)
+
 
 /*
 ** test whether a string is a reserved word
 */
-#define isreserved(s)	((s)->tt == LUA_TSHRSTR && (s)->extra > 0)
+#define isreserved(s)	((s)->tsv.tt == LUA_TSHRSTR && (s)->tsv.extra > 0)
 
 
 /*
 ** equality for short strings, which are always internalized
 */
-#define eqshrstr(a,b)	check_exp((a)->tt == LUA_TSHRSTR, (a) == (b))
+#define eqshrstr(a,b)	check_exp((a)->tsv.tt == LUA_TSHRSTR, (a) == (b))
 
 
 LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
-LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
 LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
+LUAI_FUNC int luaS_eqstr (TString *a, TString *b);
 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);
+LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e);
 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);
 
 
 #endif

ltable.c

@@ -1,30 +1,27 @@
 /*
-** $Id: ltable.c,v 2.116 2015/11/03 18:35:21 roberto Exp roberto $
+** $Id: ltable.c,v 2.72 2012/09/11 19:37:16 roberto Exp $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
 
-#define ltable_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 /*
 ** Implementation of tables (aka arrays, objects, or hash tables).
 ** Tables keep its elements in two parts: an array part and a hash part.
 ** Non-negative integer keys are all candidates to be kept in the array
-** part. The actual size of the array is the largest 'n' such that
-** more than half the slots between 1 and n are in use.
+** part. The actual size of the array is the largest `n' such that at
+** least half the slots between 0 and n are in use.
 ** Hash uses a mix of chained scatter table with Brent's variation.
 ** A main invariant of these tables is that, if an element is not
-** in its main position (i.e. the 'original' position that its hash gives
+** in its main position (i.e. the `original' position that its hash gives
 ** to it), then the colliding element is in its own main position.
 ** Hence even when the load factor reaches 100%, performance remains good.
 */
 
-#include <math.h>
-#include <limits.h>
+#include <string.h>
+
+#define ltable_c
+#define LUA_CORE
 
 #include "lua.h"
 
@@ -40,26 +37,21 @@
 
 
 /*
-** Maximum size of array part (MAXASIZE) is 2^MAXABITS. MAXABITS is
-** the largest integer such that MAXASIZE fits in an unsigned int.
+** max size of array part is 2^MAXBITS
 */
-#define MAXABITS	cast_int(sizeof(int) * CHAR_BIT - 1)
-#define MAXASIZE	(1u << MAXABITS)
+#if LUAI_BITSINT >= 32
+#define MAXBITS		30
+#else
+#define MAXBITS		(LUAI_BITSINT-2)
+#endif
 
-/*
-** Maximum size of hash part is 2^MAXHBITS. MAXHBITS is the largest
-** integer such that 2^MAXHBITS fits in a signed int. (Note that the
-** maximum number of elements in a table, 2^MAXABITS + 2^MAXHBITS, still
-** fits comfortably in an unsigned int.)
-*/
-#define MAXHBITS	(MAXABITS - 1)
+#define MAXASIZE	(1 << MAXBITS)
 
 
 #define hashpow2(t,n)		(gnode(t, lmod((n), sizenode(t))))
 
-#define hashstr(t,str)		hashpow2(t, (str)->hash)
+#define hashstr(t,str)		hashpow2(t, (str)->tsv.hash)
 #define hashboolean(t,p)	hashpow2(t, p)
-#define hashint(t,i)		hashpow2(t, i)
 
 
 /*
@@ -69,7 +61,7 @@
 #define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))
 
 
-#define hashpointer(t,p)	hashmod(t, point2uint(p))
+#define hashpointer(t,p)	hashmod(t, IntPoint(p))
 
 
 #define dummynode		(&dummynode_)
@@ -78,54 +70,44 @@
 
 static const Node dummynode_ = {
   {NILCONSTANT},  /* value */
-  {{NILCONSTANT, 0}}  /* key */
+  {{NILCONSTANT, NULL}}  /* key */
 };
 
 
 /*
-** Hash for floating-point numbers.
-** The main computation should be just
-**     n = frexp(n, &i); return (n * INT_MAX) + i
-** but there are some numerical subtleties.
-** In a two-complement representation, INT_MAX does not has an exact
-** representation as a float, but INT_MIN does; because the absolute
-** value of 'frexp' is smaller than 1 (unless 'n' is inf/NaN), the
-** absolute value of the product 'frexp * -INT_MIN' is smaller or equal
-** to INT_MAX. Next, the use of 'unsigned int' avoids overflows when
-** adding 'i'; the use of '~u' (instead of '-u') avoids problems with
-** INT_MIN.
+** hash for lua_Numbers
 */
-#if !defined(l_hashfloat)
-static int l_hashfloat (lua_Number n) {
+static Node *hashnum (const Table *t, lua_Number n) {
   int i;
-  lua_Integer ni;
-  n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN);
-  if (!lua_numbertointeger(n, &ni)) {  /* is 'n' inf/-inf/NaN? */
-    lua_assert(luai_numisnan(n) || l_mathop(fabs)(n) == cast_num(HUGE_VAL));
-    return 0;
-  }
-  else {  /* normal case */
-    unsigned int u = cast(unsigned int, i) + cast(unsigned int, ni);
-    return cast_int(u <= cast(unsigned int, INT_MAX) ? u : ~u);
+  luai_hashnum(i, n);
+  if (i < 0) {
+    if (cast(unsigned int, i) == 0u - i)  /* use unsigned to avoid overflows */
+      i = 0;  /* handle INT_MIN */
+    i = -i;  /* must be a positive value */
   }
+  return hashmod(t, i);
 }
-#endif
+
 
 
 /*
-** returns the 'main' position of an element in a table (that is, the index
+** returns the `main' position of an element in a table (that is, the index
 ** of its hash value)
 */
 static Node *mainposition (const Table *t, const TValue *key) {
   switch (ttype(key)) {
-    case LUA_TNUMINT:
-      return hashint(t, ivalue(key));
-    case LUA_TNUMFLT:
-      return hashmod(t, l_hashfloat(fltvalue(key)));
+    case LUA_TNUMBER:
+      return hashnum(t, nvalue(key));
+    case LUA_TLNGSTR: {
+      TString *s = rawtsvalue(key);
+      if (s->tsv.extra == 0) {  /* no hash? */
+        s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
+        s->tsv.extra = 1;  /* now it has its hash */
+      }
+      return hashstr(t, rawtsvalue(key));
+    }
     case LUA_TSHRSTR:
-      return hashstr(t, tsvalue(key));
-    case LUA_TLNGSTR:
-      return hashpow2(t, luaS_hashlongstr(tsvalue(key)));
+      return hashstr(t, rawtsvalue(key));
     case LUA_TBOOLEAN:
       return hashboolean(t, bvalue(key));
     case LUA_TLIGHTUSERDATA:
@@ -133,68 +115,67 @@ static Node *mainposition (const Table *t, const TValue *key) {
     case LUA_TLCF:
       return hashpointer(t, fvalue(key));
     default:
-      lua_assert(!ttisdeadkey(key));
       return hashpointer(t, gcvalue(key));
   }
 }
 
 
 /*
-** returns the index for 'key' if 'key' is an appropriate key to live in
-** the array part of the table, 0 otherwise.
+** returns the index for `key' if `key' is an appropriate key to live in
+** the array part of the table, -1 otherwise.
 */
-static unsigned int arrayindex (const TValue *key) {
-  if (ttisinteger(key)) {
-    lua_Integer k = ivalue(key);
-    if (0 < k && (lua_Unsigned)k <= MAXASIZE)
-      return cast(unsigned int, k);  /* 'key' is an appropriate array index */
+static int arrayindex (const TValue *key) {
+  if (ttisnumber(key)) {
+    lua_Number n = nvalue(key);
+    int k;
+    lua_number2int(k, n);
+    if (luai_numeq(cast_num(k), n))
+      return k;
   }
-  return 0;  /* 'key' did not match some condition */
+  return -1;  /* `key' did not match some condition */
 }
 
 
 /*
-** returns the index of a 'key' for table traversals. First goes all
+** returns the index of a `key' for table traversals. First goes all
 ** elements in the array part, then elements in the hash part. The
-** beginning of a traversal is signaled by 0.
+** beginning of a traversal is signaled by -1.
 */
-static unsigned int findindex (lua_State *L, Table *t, StkId key) {
-  unsigned int i;
-  if (ttisnil(key)) return 0;  /* first iteration */
+static int findindex (lua_State *L, Table *t, StkId key) {
+  int i;
+  if (ttisnil(key)) return -1;  /* first iteration */
   i = arrayindex(key);
-  if (i != 0 && i <= t->sizearray)  /* is 'key' inside array part? */
-    return i;  /* yes; that's the index */
+  if (0 < i && i <= t->sizearray)  /* is `key' inside array part? */
+    return i-1;  /* yes; that's the index (corrected to C) */
   else {
-    int nx;
     Node *n = mainposition(t, key);
-    for (;;) {  /* check whether 'key' is somewhere in the chain */
-      /* key may be dead already, but it is ok to use it in 'next' */
+    for (;;) {  /* check whether `key' is somewhere in the chain */
+      /* key may be dead already, but it is ok to use it in `next' */
       if (luaV_rawequalobj(gkey(n), key) ||
             (ttisdeadkey(gkey(n)) && iscollectable(key) &&
              deadvalue(gkey(n)) == gcvalue(key))) {
         i = cast_int(n - gnode(t, 0));  /* key index in hash table */
         /* hash elements are numbered after array ones */
-        return (i + 1) + t->sizearray;
+        return i + t->sizearray;
       }
-      nx = gnext(n);
-      if (nx == 0)
-        luaG_runerror(L, "invalid key to 'next'");  /* key not found */
-      else n += nx;
+      else n = gnext(n);
+      if (n == NULL)
+        luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
     }
   }
 }
 
 
 int luaH_next (lua_State *L, Table *t, StkId key) {
-  unsigned int i = findindex(L, t, key);  /* find original element */
-  for (; i < t->sizearray; i++) {  /* try first array part */
+  int i = findindex(L, t, key);  /* find original element */
+  for (i++; i < t->sizearray; i++) {  /* try first array part */
     if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
-      setivalue(key, i + 1);
+      setnvalue(key, cast_num(i+1));
       setobj2s(L, key+1, &t->array[i]);
       return 1;
     }
   }
-  for (i -= t->sizearray; cast_int(i) < sizenode(t); i++) {  /* hash part */
+  for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */
     if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */
       setobj2s(L, key, gkey(gnode(t, i)));
       setobj2s(L, key+1, gval(gnode(t, i)));
@@ -211,38 +192,32 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
 ** ==============================================================
 */
 
-/*
-** Compute the optimal size for the array part of table 't'. 'nums' is a
-** "count array" where 'nums[i]' is the number of integers in the table
-** between 2^(i - 1) + 1 and 2^i. 'pna' enters with the total number of
-** integer keys in the table and leaves with the number of keys that
-** will go to the array part; return the optimal size.
-*/
-static unsigned int computesizes (unsigned int nums[], unsigned int *pna) {
+
+static int computesizes (int nums[], int *narray) {
   int i;
-  unsigned int twotoi;  /* 2^i (candidate for optimal size) */
-  unsigned int a = 0;  /* number of elements smaller than 2^i */
-  unsigned int na = 0;  /* number of elements to go to array part */
-  unsigned int optimal = 0;  /* optimal size for array part */
-  /* loop while keys can fill more than half of total size */
-  for (i = 0, twotoi = 1; *pna > twotoi / 2; i++, twotoi *= 2) {
+  int twotoi;  /* 2^i */
+  int a = 0;  /* number of elements smaller than 2^i */
+  int na = 0;  /* number of elements to go to array part */
+  int n = 0;  /* optimal size for array part */
+  for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
     if (nums[i] > 0) {
       a += nums[i];
       if (a > twotoi/2) {  /* more than half elements present? */
-        optimal = twotoi;  /* optimal size (till now) */
-        na = a;  /* all elements up to 'optimal' will go to array part */
+        n = twotoi;  /* optimal size (till now) */
+        na = a;  /* all elements smaller than n will go to array part */
       }
     }
+    if (a == *narray) break;  /* all elements already counted */
   }
-  lua_assert((optimal == 0 || optimal / 2 < na) && na <= optimal);
-  *pna = na;
-  return optimal;
+  *narray = n;
+  lua_assert(*narray/2 <= na && na <= *narray);
+  return na;
 }
 
 
-static int countint (const TValue *key, unsigned int *nums) {
-  unsigned int k = arrayindex(key);
-  if (k != 0) {  /* is 'key' an appropriate array index? */
+static int countint (const TValue *key, int *nums) {
+  int k = arrayindex(key);
+  if (0 < k && k <= MAXASIZE) {  /* is `key' an appropriate array index? */
     nums[luaO_ceillog2(k)]++;  /* count as such */
     return 1;
   }
@@ -251,26 +226,20 @@ static int countint (const TValue *key, unsigned int *nums) {
 }
 
 
-/*
-** Count keys in array part of table 't': Fill 'nums[i]' with
-** number of keys that will go into corresponding slice and return
-** total number of non-nil keys.
-*/
-static unsigned int numusearray (const Table *t, unsigned int *nums) {
+static int numusearray (const Table *t, int *nums) {
   int lg;
-  unsigned int ttlg;  /* 2^lg */
-  unsigned int ause = 0;  /* summation of 'nums' */
-  unsigned int i = 1;  /* count to traverse all array keys */
-  /* traverse each slice */
-  for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) {
-    unsigned int lc = 0;  /* counter */
-    unsigned int lim = ttlg;
+  int ttlg;  /* 2^lg */
+  int ause = 0;  /* summation of `nums' */
+  int i = 1;  /* count to traverse all array keys */
+  for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) {  /* for each slice */
+    int lc = 0;  /* counter */
+    int lim = ttlg;
     if (lim > t->sizearray) {
       lim = t->sizearray;  /* adjust upper limit */
       if (i > lim)
         break;  /* no more elements to count */
     }
-    /* count elements in range (2^(lg - 1), 2^lg] */
+    /* count elements in range (2^(lg-1), 2^lg] */
     for (; i <= lim; i++) {
       if (!ttisnil(&t->array[i-1]))
         lc++;
@@ -282,9 +251,9 @@ static unsigned int numusearray (const Table *t, unsigned int *nums) {
 }
 
 
-static int numusehash (const Table *t, unsigned int *nums, unsigned int *pna) {
+static int numusehash (const Table *t, int *nums, int *pnasize) {
   int totaluse = 0;  /* total number of elements */
-  int ause = 0;  /* elements added to 'nums' (can go to array part) */
+  int ause = 0;  /* summation of `nums' */
   int i = sizenode(t);
   while (i--) {
     Node *n = &t->node[i];
@@ -293,13 +262,13 @@ static int numusehash (const Table *t, unsigned int *nums, unsigned int *pna) {
       totaluse++;
     }
   }
-  *pna += ause;
+  *pnasize += ause;
   return totaluse;
 }
 
 
-static void setarrayvector (lua_State *L, Table *t, unsigned int size) {
-  unsigned int i;
+static void setarrayvector (lua_State *L, Table *t, int size) {
+  int i;
   luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
   for (i=t->sizearray; i<size; i++)
      setnilvalue(&t->array[i]);
@@ -307,23 +276,23 @@ static void setarrayvector (lua_State *L, Table *t, unsigned int size) {
 }
 
 
-static void setnodevector (lua_State *L, Table *t, unsigned int size) {
+static void setnodevector (lua_State *L, Table *t, int size) {
   int lsize;
   if (size == 0) {  /* no elements to hash part? */
-    t->node = cast(Node *, dummynode);  /* use common 'dummynode' */
+    t->node = cast(Node *, dummynode);  /* use common `dummynode' */
     lsize = 0;
   }
   else {
     int i;
     lsize = luaO_ceillog2(size);
-    if (lsize > MAXHBITS)
+    if (lsize > MAXBITS)
       luaG_runerror(L, "table overflow");
     size = twoto(lsize);
     t->node = luaM_newvector(L, size, Node);
-    for (i = 0; i < (int)size; i++) {
+    for (i=0; i<size; i++) {
       Node *n = gnode(t, i);
-      gnext(n) = 0;
-      setnilvalue(wgkey(n));
+      gnext(n) = NULL;
+      setnilvalue(gkey(n));
       setnilvalue(gval(n));
     }
   }
@@ -332,11 +301,9 @@ static void setnodevector (lua_State *L, Table *t, unsigned int size) {
 }
 
 
-void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
-                                          unsigned int nhsize) {
-  unsigned int i;
-  int j;
-  unsigned int oldasize = t->sizearray;
+void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
+  int i;
+  int oldasize = t->sizearray;
   int oldhsize = t->lsizenode;
   Node *nold = t->node;  /* save old hash ... */
   if (nasize > oldasize)  /* array part must grow? */
@@ -354,8 +321,8 @@ void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
     luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
   }
   /* re-insert elements from hash part */
-  for (j = twoto(oldhsize) - 1; j >= 0; j--) {
-    Node *old = nold + j;
+  for (i = twoto(oldhsize) - 1; i >= 0; i--) {
+    Node *old = nold+i;
     if (!ttisnil(gval(old))) {
       /* doesn't need barrier/invalidate cache, as entry was
          already present in the table */
@@ -363,35 +330,32 @@ void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
     }
   }
   if (!isdummy(nold))
-    luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old hash */
+    luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */
 }
 
 
-void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
+void luaH_resizearray (lua_State *L, Table *t, int nasize) {
   int nsize = isdummy(t->node) ? 0 : sizenode(t);
   luaH_resize(L, t, nasize, nsize);
 }
 
-/*
-** nums[i] = number of keys 'k' where 2^(i - 1) < k <= 2^i
-*/
+
 static void rehash (lua_State *L, Table *t, const TValue *ek) {
-  unsigned int asize;  /* optimal size for array part */
-  unsigned int na;  /* number of keys in the array part */
-  unsigned int nums[MAXABITS + 1];
+  int nasize, na;
+  int nums[MAXBITS+1];  /* nums[i] = number of keys with 2^(i-1) < k <= 2^i */
   int i;
   int totaluse;
-  for (i = 0; i <= MAXABITS; i++) nums[i] = 0;  /* reset counts */
-  na = numusearray(t, nums);  /* count keys in array part */
-  totaluse = na;  /* all those keys are integer keys */
-  totaluse += numusehash(t, nums, &na);  /* count keys in hash part */
+  for (i=0; i<=MAXBITS; i++) nums[i] = 0;  /* reset counts */
+  nasize = numusearray(t, nums);  /* count keys in array part */
+  totaluse = nasize;  /* all those keys are integer keys */
+  totaluse += numusehash(t, nums, &nasize);  /* count keys in hash part */
   /* count extra key */
-  na += countint(ek, nums);
+  nasize += countint(ek, nums);
   totaluse++;
   /* compute new size for array part */
-  asize = computesizes(nums, &na);
+  na = computesizes(nums, &nasize);
   /* resize the table to new computed sizes */
-  luaH_resize(L, t, asize, totaluse - na);
+  luaH_resize(L, t, nasize, totaluse - na);
 }
 
 
@@ -402,8 +366,7 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
 
 
 Table *luaH_new (lua_State *L) {
-  GCObject *o = luaC_newobj(L, LUA_TTABLE, sizeof(Table));
-  Table *t = gco2t(o);
+  Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h;
   t->metatable = NULL;
   t->flags = cast_byte(~0);
   t->array = NULL;
@@ -441,51 +404,37 @@ static Node *getfreepos (Table *t) {
 */
 TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
   Node *mp;
-  TValue aux;
   if (ttisnil(key)) luaG_runerror(L, "table index is nil");
-  else if (ttisfloat(key)) {
-    lua_Integer k;
-    if (luaV_tointeger(key, &k, 0)) {  /* index is int? */
-      setivalue(&aux, k);
-      key = &aux;  /* insert it as an integer */
-    }
-    else if (luai_numisnan(fltvalue(key)))
-      luaG_runerror(L, "table index is NaN");
-  }
+  else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
+    luaG_runerror(L, "table index is NaN");
   mp = mainposition(t, key);
   if (!ttisnil(gval(mp)) || isdummy(mp)) {  /* main position is taken? */
     Node *othern;
-    Node *f = getfreepos(t);  /* get a free place */
-    if (f == NULL) {  /* cannot find a free place? */
+    Node *n = getfreepos(t);  /* get a free place */
+    if (n == NULL) {  /* cannot find a free place? */
       rehash(L, t, key);  /* grow table */
-      /* whatever called 'newkey' takes care of TM cache */
+      /* whatever called 'newkey' take care of TM cache and GC barrier */
       return luaH_set(L, t, key);  /* insert key into grown table */
     }
-    lua_assert(!isdummy(f));
+    lua_assert(!isdummy(n));
     othern = mainposition(t, gkey(mp));
     if (othern != mp) {  /* is colliding node out of its main position? */
       /* yes; move colliding node into free position */
-      while (othern + gnext(othern) != mp)  /* find previous */
-        othern += gnext(othern);
-      gnext(othern) = cast_int(f - othern);  /* rechain to point to 'f' */
-      *f = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
-      if (gnext(mp) != 0) {
-        gnext(f) += cast_int(mp - f);  /* correct 'next' */
-        gnext(mp) = 0;  /* now 'mp' is free */
-      }
+      while (gnext(othern) != mp) othern = gnext(othern);  /* find previous */
+      gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
+      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      gnext(mp) = NULL;  /* now `mp' is free */
       setnilvalue(gval(mp));
     }
     else {  /* colliding node is in its own main position */
       /* new node will go into free position */
-      if (gnext(mp) != 0)
-        gnext(f) = cast_int((mp + gnext(mp)) - f);  /* chain new position */
-      else lua_assert(gnext(f) == 0);
-      gnext(mp) = cast_int(f - mp);
-      mp = f;
+      gnext(n) = gnext(mp);  /* chain new position */
+      gnext(mp) = n;
+      mp = n;
     }
   }
-  setnodekey(L, &mp->i_key, key);
-  luaC_barrierback(L, t, key);
+  setobj2t(L, gkey(mp), key);
+  luaC_barrierback(L, obj2gco(t), key);
   lua_assert(ttisnil(gval(mp)));
   return gval(mp);
 }
@@ -494,21 +443,18 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
 /*
 ** search function for integers
 */
-const TValue *luaH_getint (Table *t, lua_Integer key) {
+const TValue *luaH_getint (Table *t, int key) {
   /* (1 <= key && key <= t->sizearray) */
-  if (l_castS2U(key) - 1 < t->sizearray)
-    return &t->array[key - 1];
+  if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
+    return &t->array[key-1];
   else {
-    Node *n = hashint(t, key);
-    for (;;) {  /* check whether 'key' is somewhere in the chain */
-      if (ttisinteger(gkey(n)) && ivalue(gkey(n)) == key)
+    lua_Number nk = cast_num(key);
+    Node *n = hashnum(t, nk);
+    do {  /* check whether `key' is somewhere in the chain */
+      if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
         return gval(n);  /* that's it */
-      else {
-        int nx = gnext(n);
-        if (nx == 0) break;
-        n += nx;
-      }
-    }
+      else n = gnext(n);
+    } while (n);
     return luaO_nilobject;
   }
 }
@@ -517,50 +463,15 @@ const TValue *luaH_getint (Table *t, lua_Integer key) {
 /*
 ** search function for short strings
 */
-const TValue *luaH_getshortstr (Table *t, TString *key) {
-  Node *n = hashstr(t, key);
-  lua_assert(key->tt == LUA_TSHRSTR);
-  for (;;) {  /* check whether 'key' is somewhere in the chain */
-    const TValue *k = gkey(n);
-    if (ttisshrstring(k) && eqshrstr(tsvalue(k), key))
-      return gval(n);  /* that's it */
-    else {
-      int nx = gnext(n);
-      if (nx == 0)
-        return luaO_nilobject;  /* not found */
-      n += nx;
-    }
-  }
-}
-
-
-/*
-** "Generic" get version. (Not that generic: not valid for integers,
-** which may be in array part, nor for floats with integral values.)
-*/
-static const TValue *getgeneric (Table *t, const TValue *key) {
-  Node *n = mainposition(t, key);
-  for (;;) {  /* check whether 'key' is somewhere in the chain */
-    if (luaV_rawequalobj(gkey(n), key))
-      return gval(n);  /* that's it */
-    else {
-      int nx = gnext(n);
-      if (nx == 0)
-        return luaO_nilobject;  /* not found */
-      n += nx;
-    }
-  }
-}
-
-
 const TValue *luaH_getstr (Table *t, TString *key) {
-  if (key->tt == LUA_TSHRSTR)
-    return luaH_getshortstr(t, key);
-  else {  /* for long strings, use generic case */
-    TValue ko;
-    setsvalue(cast(lua_State *, NULL), &ko, key);
-    return getgeneric(t, &ko);
-  }
+  Node *n = hashstr(t, key);
+  lua_assert(key->tsv.tt == LUA_TSHRSTR);
+  do {  /* check whether `key' is somewhere in the chain */
+    if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key))
+      return gval(n);  /* that's it */
+    else n = gnext(n);
+  } while (n);
+  return luaO_nilobject;
 }
 
 
@@ -569,17 +480,25 @@ const TValue *luaH_getstr (Table *t, TString *key) {
 */
 const TValue *luaH_get (Table *t, const TValue *key) {
   switch (ttype(key)) {
-    case LUA_TSHRSTR: return luaH_getshortstr(t, tsvalue(key));
-    case LUA_TNUMINT: return luaH_getint(t, ivalue(key));
+    case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key));
     case LUA_TNIL: return luaO_nilobject;
-    case LUA_TNUMFLT: {
-      lua_Integer k;
-      if (luaV_tointeger(key, &k, 0)) /* index is int? */
+    case LUA_TNUMBER: {
+      int k;
+      lua_Number n = nvalue(key);
+      lua_number2int(k, n);
+      if (luai_numeq(cast_num(k), n)) /* index is int? */
         return luaH_getint(t, k);  /* use specialized version */
-      /* else... */
-    }  /* FALLTHROUGH */
-    default:
-      return getgeneric(t, key);
+      /* else go through */
+    }
+    default: {
+      Node *n = mainposition(t, key);
+      do {  /* check whether `key' is somewhere in the chain */
+        if (luaV_rawequalobj(gkey(n), key))
+          return gval(n);  /* that's it */
+        else n = gnext(n);
+      } while (n);
+      return luaO_nilobject;
+    }
   }
 }
 
@@ -596,14 +515,14 @@ TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
 }
 
 
-void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
+void luaH_setint (lua_State *L, Table *t, int key, TValue *value) {
   const TValue *p = luaH_getint(t, key);
   TValue *cell;
   if (p != luaO_nilobject)
     cell = cast(TValue *, p);
   else {
     TValue k;
-    setivalue(&k, key);
+    setnvalue(&k, cast_num(key));
     cell = luaH_newkey(L, t, &k);
   }
   setobj2t(L, cell, value);
@@ -613,16 +532,16 @@ void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
 static int unbound_search (Table *t, unsigned int j) {
   unsigned int i = j;  /* i is zero or a present index */
   j++;
-  /* find 'i' and 'j' such that i is present and j is not */
+  /* find `i' and `j' such that i is present and j is not */
   while (!ttisnil(luaH_getint(t, j))) {
     i = j;
-    if (j > cast(unsigned int, MAX_INT)/2) {  /* overflow? */
+    j *= 2;
+    if (j > cast(unsigned int, MAX_INT)) {  /* overflow? */
       /* table was built with bad purposes: resort to linear search */
       i = 1;
       while (!ttisnil(luaH_getint(t, i))) i++;
       return i - 1;
     }
-    j *= 2;
   }
   /* now do a binary search between them */
   while (j - i > 1) {
@@ -635,7 +554,7 @@ static int unbound_search (Table *t, unsigned int j) {
 
 
 /*
-** Try to find a boundary in table 't'. A 'boundary' is an integer index
+** Try to find a boundary in table `t'. A `boundary' is an integer index
 ** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
 */
 int luaH_getn (Table *t) {

ltable.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h,v 2.20 2014/09/04 18:15:29 roberto Exp roberto $
+** $Id: ltable.h,v 2.16.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -11,39 +11,26 @@
 
 
 #define gnode(t,i)	(&(t)->node[i])
+#define gkey(n)		(&(n)->i_key.tvk)
 #define gval(n)		(&(n)->i_val)
 #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))
-
-/*
-** writable version of 'gkey'; allows updates to individual fields,
-** but not to the whole (which has incompatible type)
-*/
-#define wgkey(n)		(&(n)->i_key.nk)
-
 #define invalidateTMcache(t)	((t)->flags = 0)
 
-
 /* 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);
-LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
-                                                    TValue *value);
-LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
+LUAI_FUNC const TValue *luaH_getint (Table *t, int key);
+LUAI_FUNC void luaH_setint (lua_State *L, Table *t, int key, TValue *value);
 LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
 LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
 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);
-LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
+LUAI_FUNC void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize);
+LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, 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 int luaH_getn (Table *t);

ltablib.c

@@ -1,18 +1,15 @@
 /*
-** $Id: ltablib.c,v 1.89 2015/11/24 16:54:32 roberto Exp roberto $
+** $Id: ltablib.c,v 1.65.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Library for Table Manipulation
 ** See Copyright Notice in lua.h
 */
 
-#define ltablib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
 
 #include <limits.h>
 #include <stddef.h>
-#include <string.h>
+
+#define ltablib_c
+#define LUA_LIB
 
 #include "lua.h"
 
@@ -20,43 +17,9 @@
 #include "lualib.h"
 
 
-/*
-** Operations that an object must define to mimic a table
-** (some functions only need some of them)
-*/
-#define TAB_R	1			/* read */
-#define TAB_W	2			/* write */
-#define TAB_L	4			/* length */
-#define TAB_RW	(TAB_R | TAB_W)		/* read/write */
+#define aux_getn(L,n)	(luaL_checktype(L, n, LUA_TTABLE), luaL_len(L, n))
 
 
-#define aux_getn(L,n,w)	(checktab(L, n, (w) | TAB_L), luaL_len(L, n))
-
-
-static int checkfield (lua_State *L, const char *key, int n) {
-  lua_pushstring(L, key);
-  return (lua_rawget(L, -n) != LUA_TNIL);
-}
-
-
-/*
-** Check that 'arg' either is a table or can behave like one (that is,
-** has a metatable with the required metamethods)
-*/
-static void checktab (lua_State *L, int arg, int what) {
-  if (lua_type(L, arg) != LUA_TTABLE) {  /* is it not a table? */
-    int n = 1;  /* number of elements to pop */
-    if (lua_getmetatable(L, arg) &&  /* must have metatable */
-        (!(what & TAB_R) || checkfield(L, "__index", ++n)) &&
-        (!(what & TAB_W) || checkfield(L, "__newindex", ++n)) &&
-        (!(what & TAB_L) || checkfield(L, "__len", ++n))) {
-      lua_pop(L, n);  /* pop metatable and tested metamethods */
-    }
-    else
-      luaL_argerror(L, arg, "table expected");  /* force an error */
-  }
-}
-
 
 #if defined(LUA_COMPAT_MAXN)
 static int maxn (lua_State *L) {
@@ -77,102 +40,65 @@ static int maxn (lua_State *L) {
 
 
 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 */
+  int e = aux_getn(L, 1) + 1;  /* first empty element */
+  int pos;  /* where to insert new element */
   switch (lua_gettop(L)) {
     case 2: {  /* called with only 2 arguments */
       pos = e;  /* insert new element at the end */
       break;
     }
     case 3: {
-      lua_Integer i;
-      pos = luaL_checkinteger(L, 2);  /* 2nd argument is the position */
+      int i;
+      pos = luaL_checkint(L, 2);  /* 2nd argument is the position */
       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] */
+        lua_rawgeti(L, 1, i-1);
+        lua_rawseti(L, 1, i);  /* t[i] = t[i-1] */
       }
       break;
     }
     default: {
-      return luaL_error(L, "wrong number of arguments to 'insert'");
+      return luaL_error(L, "wrong number of arguments to " LUA_QL("insert"));
     }
   }
-  lua_seti(L, 1, pos);  /* t[pos] = v */
+  lua_rawseti(L, 1, pos);  /* t[pos] = v */
   return 0;
 }
 
 
 static int tremove (lua_State *L) {
-  lua_Integer size = aux_getn(L, 1, TAB_RW);
-  lua_Integer pos = luaL_optinteger(L, 2, size);
+  int size = aux_getn(L, 1);
+  int pos = luaL_optint(L, 2, size);
   if (pos != size)  /* validate 'pos' if given */
     luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
-  lua_geti(L, 1, pos);  /* result = t[pos] */
+  lua_rawgeti(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_rawgeti(L, 1, pos+1);
+    lua_rawseti(L, 1, pos);  /* t[pos] = t[pos+1] */
   }
   lua_pushnil(L);
-  lua_seti(L, 1, pos);  /* t[pos] = nil */
+  lua_rawseti(L, 1, pos);  /* t[pos] = nil */
   return 1;
 }
 
 
-/*
-** Copy elements (1[f], ..., 1[e]) into (tt[t], tt[t+1], ...). Whenever
-** possible, copy in increasing order, which is better for rehashing.
-** "possible" means destination after original range, or smaller
-** than origin, or copying to another table.
-*/
-static int tmove (lua_State *L) {
-  lua_Integer f = luaL_checkinteger(L, 2);
-  lua_Integer e = luaL_checkinteger(L, 3);
-  lua_Integer t = luaL_checkinteger(L, 4);
-  int tt = !lua_isnoneornil(L, 5) ? 5 : 1;  /* destination table */
-  checktab(L, 1, TAB_R);
-  checktab(L, tt, TAB_W);
-  if (e >= f) {  /* otherwise, nothing to move */
-    lua_Integer n, i;
-    luaL_argcheck(L, f > 0 || e < LUA_MAXINTEGER + f, 3,
-                  "too many elements to move");
-    n = e - f + 1;  /* number of elements to move */
-    luaL_argcheck(L, t <= LUA_MAXINTEGER - n + 1, 4,
-                  "destination wrap around");
-    if (t > e || t <= f || tt != 1) {
-      for (i = 0; i < n; i++) {
-        lua_geti(L, 1, f + i);
-        lua_seti(L, tt, t + i);
-      }
-    }
-    else {
-      for (i = n - 1; i >= 0; i--) {
-        lua_geti(L, 1, f + i);
-        lua_seti(L, tt, t + i);
-      }
-    }
-  }
-  lua_pushvalue(L, tt);  /* return "to table" */
-  return 1;
-}
-
-
-static void addfield (lua_State *L, luaL_Buffer *b, lua_Integer i) {
-  lua_geti(L, 1, i);
+static void addfield (lua_State *L, luaL_Buffer *b, int i) {
+  lua_rawgeti(L, 1, i);
   if (!lua_isstring(L, -1))
-    luaL_error(L, "invalid value (%s) at index %d in table for 'concat'",
-                  luaL_typename(L, -1), i);
+    luaL_error(L, "invalid value (%s) at index %d in table for "
+                  LUA_QL("concat"), luaL_typename(L, -1), i);
   luaL_addvalue(b);
 }
 
 
 static int tconcat (lua_State *L) {
   luaL_Buffer b;
-  lua_Integer last = aux_getn(L, 1, TAB_R);
   size_t lsep;
+  int i, last;
   const char *sep = luaL_optlstring(L, 2, "", &lsep);
-  lua_Integer i = luaL_optinteger(L, 3, 1);
-  last = luaL_opt(L, luaL_checkinteger, 4, last);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  i = luaL_optint(L, 3, 1);
+  last = luaL_opt(L, luaL_checkint, 4, luaL_len(L, 1));
   luaL_buffinit(L, &b);
   for (; i < last; i++) {
     addfield(L, &b, i);
@@ -192,31 +118,36 @@ static int tconcat (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 */
-  lua_insert(L, 1);  /* put it at index 1 */
-  for (i = n; i >= 1; i--)  /* assign elements */
-    lua_seti(L, 1, i);
   lua_pushinteger(L, n);
-  lua_setfield(L, 1, "n");  /* t.n = number of elements */
+  lua_setfield(L, -2, "n");  /* t.n = number of elements */
+  if (n > 0) {  /* at least one element? */
+    int i;
+    lua_pushvalue(L, 1);
+    lua_rawseti(L, -2, 1);  /* insert first element */
+    lua_replace(L, 1);  /* move table into index 1 */
+    for (i = n; i >= 2; i--)  /* assign other elements */
+      lua_rawseti(L, 1, i);
+  }
   return 1;  /* return table */
 }
 
 
 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));
+  int i, e;
+  unsigned int n;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  i = luaL_optint(L, 2, 1);
+  e = luaL_opt(L, luaL_checkint, 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 (n >= (unsigned int)INT_MAX  || !lua_checkstack(L, (int)(++n)))
+  n = (unsigned int)e - (unsigned int)i;  /* number of elements minus 1 */
+  if (n > (INT_MAX - 10) || !lua_checkstack(L, ++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);
-  }
-  lua_geti(L, 1, e);  /* push last element */
-  return (int)n;
+  lua_rawgeti(L, 1, i);  /* push arg[i] (avoiding overflow problems) */
+  while (i++ < e)  /* push arg[i + 1...e] */
+    lua_rawgeti(L, 1, i);
+  return n;
 }
 
 /* }====================================================== */
@@ -226,196 +157,102 @@ static int unpack (lua_State *L) {
 /*
 ** {======================================================
 ** Quicksort
-** (based on 'Algorithms in MODULA-3', Robert Sedgewick;
+** (based on `Algorithms in MODULA-3', Robert Sedgewick;
 **  Addison-Wesley, 1993.)
 ** =======================================================
 */
 
 
-/*
-** Produce a "random" 'unsigned int' to randomize pivot choice. This
-** macro is used only when 'sort' detects a big imbalance in the result
-** of a partition. (If you don't want/need this "randomness", ~0 is a
-** good choice.)
-*/
-#if !defined(l_randomizePivot)		/* { */
-
-#include <time.h>
-
-/* size of 'e' measured in number of 'unsigned int's */
-#define sof(e)		(sizeof(e) / sizeof(unsigned int))
-
-/*
-** Use 'time' and 'clock' as sources of "randomness". Because we don't
-** know the types 'clock_t' and 'time_t', we cannot cast them to
-** anything without risking overflows. A safe way to use their values
-** is to copy them to an array of a known type and use the array values.
-*/
-static unsigned int l_randomizePivot (void) {
-  clock_t c = clock();
-  time_t t = time(NULL);
-  unsigned int buff[sof(c) + sof(t)];
-  unsigned int i, rnd = 0;
-  memcpy(buff, &c, sof(c) * sizeof(unsigned int));
-  memcpy(buff + sof(c), &t, sof(t) * sizeof(unsigned int));
-  for (i = 0; i < sof(buff); i++)
-    rnd += buff[i];
-  return rnd;
+static void set2 (lua_State *L, int i, int j) {
+  lua_rawseti(L, 1, i);
+  lua_rawseti(L, 1, j);
 }
 
-#endif					/* } */
-
-
-/* arrays larger than 'RANLIMIT' may use randomized pivots */
-#define RANLIMIT	100u
-
-
-static void set2 (lua_State *L, unsigned int i, unsigned int j) {
-  lua_seti(L, 1, i);
-  lua_seti(L, 1, j);
-}
-
-
-/*
-** Return true iff value at stack index 'a' is less than the value at
-** index 'b' (according to the order of the sort).
-*/
 static int sort_comp (lua_State *L, int a, int b) {
-  if (lua_isnil(L, 2))  /* no function? */
-    return lua_compare(L, a, b, LUA_OPLT);  /* a < b */
-  else {  /* function */
+  if (!lua_isnil(L, 2)) {  /* function? */
     int res;
-    lua_pushvalue(L, 2);    /* push function */
+    lua_pushvalue(L, 2);
     lua_pushvalue(L, a-1);  /* -1 to compensate function */
-    lua_pushvalue(L, b-2);  /* -2 to compensate function and 'a' */
-    lua_call(L, 2, 1);      /* call function */
-    res = lua_toboolean(L, -1);  /* get result */
-    lua_pop(L, 1);          /* pop result */
+    lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */
+    lua_call(L, 2, 1);
+    res = lua_toboolean(L, -1);
+    lua_pop(L, 1);
     return res;
   }
+  else  /* a < b? */
+    return lua_compare(L, a, b, LUA_OPLT);
 }
 
-
-/*
-** Does the partition: Pivot P is at the top of the stack.
-** precondition: a[lo] <= P == a[up-1] <= a[up],
-** so it only needs to do the partition from lo + 1 to up - 2.
-** Pos-condition: a[lo .. i - 1] <= a[i] == P <= a[i + 1 .. up]
-** returns 'i'.
-*/
-static unsigned int partition (lua_State *L, unsigned int lo,
-                                             unsigned int up) {
-  unsigned int i = lo;  /* will be incremented before first use */
-  unsigned int j = up - 1;  /* will be decremented before first use */
-  /* loop invariant: a[lo .. i] <= P <= a[j .. up] */
-  for (;;) {
-    /* next loop: repeat ++i while a[i] < 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 (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] */
-    }
-    /* after the loop, a[j] <= P and a[j + 1 .. up] >= P */
-    if (j < i) {  /* no elements out of place? */
-      /* a[lo .. i - 1] <= P <= a[j + 1 .. i .. up] */
-      lua_pop(L, 1);  /* pop a[j] */
-      /* swap pivot (a[up - 1]) with a[i] to satisfy pos-condition */
-      set2(L, up - 1, i);
-      return i;
-    }
-    /* otherwise, swap a[i] - a[j] to restore invariant and repeat */
-    set2(L, i, j);
-  }
-}
-
-
-/*
-** Choose an element in the middle (2nd-3th quarters) of [lo,up]
-** "randomized" by 'rnd'
-*/
-static unsigned int choosePivot (unsigned int lo, unsigned int up,
-                                 unsigned int rnd) {
-  unsigned int r4 = (unsigned int)(up - lo) / 4u;  /* range/4 */
-  unsigned int p = rnd % (r4 * 2) + (lo + r4);
-  lua_assert(lo + r4 <= p && p <= up - r4);
-  return p;
-}
-
-
-/*
-** QuickSort algorithm (recursive function)
-*/
-static void auxsort (lua_State *L, unsigned int lo, unsigned int up,
-                                   unsigned int rnd) {
-  while (lo < up) {  /* loop for tail recursion */
-    unsigned int p;  /* Pivot index */
-    unsigned int n;  /* to be used later */
-    /* sort elements 'lo', 'p', and 'up' */
-    lua_geti(L, 1, lo);
-    lua_geti(L, 1, up);
-    if (sort_comp(L, -1, -2))  /* a[up] < a[lo]? */
-      set2(L, lo, up);  /* swap a[lo] - a[up] */
+static void auxsort (lua_State *L, int l, int u) {
+  while (l < u) {  /* for tail recursion */
+    int i, j;
+    /* sort elements a[l], a[(l+u)/2] and a[u] */
+    lua_rawgeti(L, 1, l);
+    lua_rawgeti(L, 1, u);
+    if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
+      set2(L, l, u);  /* swap a[l] - a[u] */
     else
-      lua_pop(L, 2);  /* remove both values */
-    if (up - lo == 1)  /* only 2 elements? */
-      return;  /* already sorted */
-    if (up - lo < RANLIMIT || rnd == 0)  /* small interval or no randomize? */
-      p = (lo + up)/2;  /* middle element is a good pivot */
-    else  /* for larger intervals, it is worth a random pivot */
-      p = choosePivot(lo, up, rnd);
-    lua_geti(L, 1, p);
-    lua_geti(L, 1, lo);
-    if (sort_comp(L, -2, -1))  /* a[p] < a[lo]? */
-      set2(L, p, lo);  /* swap a[p] - a[lo] */
+      lua_pop(L, 2);
+    if (u-l == 1) break;  /* only 2 elements */
+    i = (l+u)/2;
+    lua_rawgeti(L, 1, i);
+    lua_rawgeti(L, 1, l);
+    if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
+      set2(L, i, l);
     else {
-      lua_pop(L, 1);  /* remove a[lo] */
-      lua_geti(L, 1, up);
-      if (sort_comp(L, -1, -2))  /* a[up] < a[p]? */
-        set2(L, p, up);  /* swap a[up] - a[p] */
+      lua_pop(L, 1);  /* remove a[l] */
+      lua_rawgeti(L, 1, u);
+      if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
+        set2(L, i, u);
       else
         lua_pop(L, 2);
     }
-    if (up - lo == 2)  /* only 3 elements? */
-      return;  /* already sorted */
-    lua_geti(L, 1, p);  /* get middle element (Pivot) */
-    lua_pushvalue(L, -1);  /* push Pivot */
-    lua_geti(L, 1, up - 1);  /* push a[up - 1] */
-    set2(L, p, up - 1);  /* swap Pivot (a[p]) with a[up - 1] */
-    p = partition(L, lo, up);
-    /* a[lo .. p - 1] <= a[p] == P <= a[p + 1 .. up] */
-    if (p - lo < up - p) {  /* lower interval is smaller? */
-      auxsort(L, lo, p - 1, rnd);  /* call recursively for lower interval */
-      n = p - lo;  /* size of smaller interval */
-      lo = p + 1;  /* tail call for [p + 1 .. up] (upper interval) */
+    if (u-l == 2) break;  /* only 3 elements */
+    lua_rawgeti(L, 1, i);  /* Pivot */
+    lua_pushvalue(L, -1);
+    lua_rawgeti(L, 1, u-1);
+    set2(L, i, u-1);
+    /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
+    i = l; j = u-1;
+    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
+      /* repeat ++i until a[i] >= P */
+      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+        if (i>=u) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[i] */
+      }
+      /* repeat --j until a[j] <= P */
+      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+        if (j<=l) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[j] */
+      }
+      if (j<i) {
+        lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
+        break;
+      }
+      set2(L, i, j);
+    }
+    lua_rawgeti(L, 1, u-1);
+    lua_rawgeti(L, 1, i);
+    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
+    /* adjust so that smaller half is in [j..i] and larger one in [l..u] */
+    if (i-l < u-i) {
+      j=l; i=i-1; l=i+2;
     }
     else {
-      auxsort(L, p + 1, up, rnd);  /* call recursively for upper interval */
-      n = up - p;  /* size of smaller interval */
-      up = p - 1;  /* tail call for [lo .. p - 1]  (lower interval) */
+      j=i+1; i=u; u=j-2;
     }
-    if ((up - lo) / 128u > n) /* partition too imbalanced? */
-      rnd = l_randomizePivot();  /* try a new randomization */
-  }  /* tail call auxsort(L, lo, up, rnd) */
+    auxsort(L, j, i);  /* call recursively the smaller one */
+  }  /* repeat the routine for the larger one */
 }
 
-
 static int sort (lua_State *L) {
-  lua_Integer n = aux_getn(L, 1, TAB_RW);
-  if (n > 1) {  /* non-trivial interval? */
-    luaL_argcheck(L, n < INT_MAX, 1, "array too big");
-    luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
-    if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
-      luaL_checktype(L, 2, LUA_TFUNCTION);  /* must be a function */
-    lua_settop(L, 2);  /* make sure there are two arguments */
-    auxsort(L, 1, (unsigned int)n, 0u);
-  }
+  int n = aux_getn(L, 1);
+  luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
+  if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
+    luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_settop(L, 2);  /* make sure there is two arguments */
+  auxsort(L, 1, n);
   return 0;
 }
 
@@ -431,7 +268,6 @@ static const luaL_Reg tab_funcs[] = {
   {"pack", pack},
   {"unpack", unpack},
   {"remove", tremove},
-  {"move", tmove},
   {"sort", sort},
   {NULL, NULL}
 };

ltests.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 2.48 2015/06/18 14:27:44 roberto Exp roberto $
+** $Id: ltests.h,v 2.33 2010/07/28 15:51:59 roberto Exp $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -10,24 +10,11 @@
 
 #include <stdlib.h>
 
-/* 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
-
+/* do not use compatibility macros in Lua code */
+#undef LUA_COMPAT_API
 
 #define LUA_DEBUG
 
-
-/* turn on assertions */
 #undef NDEBUG
 #include <assert.h>
 #define lua_assert(c)           assert(c)
@@ -37,16 +24,7 @@
 #define UNUSED(x)       (x=0, (void)(x))
 
 
-/* test for sizes in 'l_sprintf' (make sure whole buffer is available) */
-#undef l_sprintf
-#if !defined(LUA_USE_C89)
-#define l_sprintf(s,sz,f,i)	(memset(s,0xAB,sz), snprintf(s,sz,f,i))
-#else
-#define l_sprintf(s,sz,f,i)	(memset(s,0xAB,sz), sprintf(s,f,i))
-#endif
-
-
-/* memory-allocator control variables */
+/* memory allocator control variables */
 typedef struct Memcontrol {
   unsigned long numblocks;
   unsigned long total;
@@ -55,7 +33,7 @@ typedef struct Memcontrol {
   unsigned long objcount[LUA_NUMTAGS];
 } Memcontrol;
 
-LUA_API Memcontrol l_memcontrol;
+extern Memcontrol l_memcontrol;
 
 
 /*
@@ -64,36 +42,34 @@ LUA_API Memcontrol l_memcontrol;
 extern void *l_Trick;
 
 
+void *debug_realloc (void *ud, void *block, size_t osize, size_t nsize);
+
+
+typedef struct CallInfo *pCallInfo;
 
-/*
-** Function to traverse and check all memory used by Lua
-*/
 int lua_checkmemory (lua_State *L);
 
 
 /* test for lock/unlock */
+#undef luai_userstateopen
+#undef luai_userstatethread
+#undef lua_lock
+#undef lua_unlock
 
 struct L_EXTRA { int lock; int *plock; };
-#undef LUA_EXTRASPACE
-#define LUA_EXTRASPACE	sizeof(struct L_EXTRA)
-#define getlock(l)	cast(struct L_EXTRA*, lua_getextraspace(l))
+#define LUAI_EXTRASPACE		sizeof(struct L_EXTRA)
+#define getlock(l)	(cast(struct L_EXTRA *, l) - 1)
 #define luai_userstateopen(l)  \
 	(getlock(l)->lock = 0, getlock(l)->plock = &(getlock(l)->lock))
-#define luai_userstateclose(l)  \
-  lua_assert(getlock(l)->lock == 1 && getlock(l)->plock == &(getlock(l)->lock))
-#define luai_userstatethread(l,l1) \
-  lua_assert(getlock(l1)->plock == getlock(l)->plock)
+#define luai_userstatethread(l,l1)  (getlock(l1)->plock = getlock(l)->plock)
 #define luai_userstatefree(l,l1) \
   lua_assert(getlock(l)->plock == getlock(l1)->plock)
 #define lua_lock(l)     lua_assert((*getlock(l)->plock)++ == 0)
 #define lua_unlock(l)   lua_assert(--(*getlock(l)->plock) == 0)
 
 
+int luaB_opentests (lua_State *L);
 
-LUA_API int luaB_opentests (lua_State *L);
-
-LUA_API void *debug_realloc (void *ud, void *block,
-                             size_t osize, size_t nsize);
 
 #if defined(lua_c)
 #define luaL_newstate()		lua_newstate(debug_realloc, &l_memcontrol)
@@ -110,17 +86,8 @@ LUA_API void *debug_realloc (void *ud, void *block,
 #define MINSTRTABSIZE		2
 
 
-/* make stack-overflow tests run faster */
-#undef LUAI_MAXSTACK
-#define LUAI_MAXSTACK   50000
-
-
 #undef LUAI_USER_ALIGNMENT_T
-#define LUAI_USER_ALIGNMENT_T   union { char b[sizeof(void*) * 8]; }
+#define LUAI_USER_ALIGNMENT_T   union { char b[32]; }
 
 
-#define STRCACHE_N	23
-#define STRCACHE_M	5
-
 #endif
-

ltm.c

@@ -1,27 +1,22 @@
 /*
-** $Id: ltm.c,v 2.35 2015/11/02 18:48:07 roberto Exp roberto $
+** $Id: ltm.c,v 2.14 2011/06/02 19:31:40 roberto Exp $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
 
-#define ltm_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <string.h>
 
+#define ltm_c
+#define LUA_CORE
+
 #include "lua.h"
 
-#include "ldebug.h"
-#include "ldo.h" 
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
-#include "lvm.h"
 
 
 static const char udatatypename[] = "userdata";
@@ -30,7 +25,7 @@ LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
   "no value",
   "nil", "boolean", udatatypename, "number",
   "string", "table", "function", udatatypename, "thread",
-  "proto" /* this last case is used for tests only */
+  "proto", "upval"  /* these last two cases are used for tests only */
 };
 
 
@@ -38,16 +33,14 @@ void luaT_init (lua_State *L) {
   static const char *const luaT_eventname[] = {  /* ORDER TM */
     "__index", "__newindex",
     "__gc", "__mode", "__len", "__eq",
-    "__add", "__sub", "__mul", "__mod", "__pow",
-    "__div", "__idiv",
-    "__band", "__bor", "__bxor", "__shl", "__shr",
-    "__unm", "__bnot", "__lt", "__le",
+    "__add", "__sub", "__mul", "__div", "__mod",
+    "__pow", "__unm", "__lt", "__le",
     "__concat", "__call"
   };
   int i;
   for (i=0; i<TM_N; i++) {
     G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
-    luaC_fix(L, obj2gco(G(L)->tmname[i]));  /* never collect these names */
+    luaS_fix(G(L)->tmname[i]);  /* never collect these names */
   }
 }
 
@@ -57,7 +50,7 @@ void luaT_init (lua_State *L) {
 ** tag methods
 */
 const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
-  const TValue *tm = luaH_getshortstr(events, ename);
+  const TValue *tm = luaH_getstr(events, ename);
   lua_assert(event <= TM_EQ);
   if (ttisnil(tm)) {  /* no tag method? */
     events->flags |= cast_byte(1u<<event);  /* cache this fact */
@@ -69,7 +62,7 @@ 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 (ttnov(o)) {
+  switch (ttypenv(o)) {
     case LUA_TTABLE:
       mt = hvalue(o)->metatable;
       break;
@@ -77,73 +70,8 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
       mt = uvalue(o)->metatable;
       break;
     default:
-      mt = G(L)->mt[ttnov(o)];
+      mt = G(L)->mt[ttypenv(o)];
   }
-  return (mt ? luaH_getshortstr(mt, G(L)->tmname[event]) : luaO_nilobject);
-}
-
-
-void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
-                  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 (isLua(L->ci))
-    luaD_call(L, func, hasres);
-  else
-    luaD_callnoyield(L, func, hasres);
-  if (hasres) {  /* if has result, move it to its place */
-    p3 = restorestack(L, result);
-    setobjs2s(L, p3, --L->top);
-  }
-}
-
-
-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 (ttisnil(tm))
-    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
-  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 (!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: {
-        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");
-      }
-      /* calls never return, but to avoid warnings: *//* FALLTHROUGH */
-      default:
-        luaG_opinterror(L, p1, p2, "perform arithmetic on");
-    }
-  }
-}
-
-
-int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2,
-                      TMS event) {
-  if (!luaT_callbinTM(L, p1, p2, L->top, event))
-    return -1;  /* no metamethod */
-  else
-    return !l_isfalse(L->top);
+  return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject);
 }
 

ltm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 2.20 2014/06/10 18:53:18 roberto Exp roberto $
+** $Id: ltm.h,v 2.11 2011/02/28 17:32:10 roberto Exp $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -13,7 +13,7 @@
 
 /*
 * WARNING: if you change the order of this enumeration,
-* grep "ORDER TM" and "ORDER OP"
+* grep "ORDER TM"
 */
 typedef enum {
   TM_INDEX,
@@ -21,21 +21,14 @@ typedef enum {
   TM_GC,
   TM_MODE,
   TM_LEN,
-  TM_EQ,  /* last tag method with fast access */
+  TM_EQ,  /* last tag method with `fast' access */
   TM_ADD,
   TM_SUB,
   TM_MUL,
+  TM_DIV,
   TM_MOD,
   TM_POW,
-  TM_DIV,
-  TM_IDIV,
-  TM_BAND,
-  TM_BOR,
-  TM_BXOR,
-  TM_SHL,
-  TM_SHR,
   TM_UNM,
-  TM_BNOT,
   TM_LT,
   TM_LE,
   TM_CONCAT,
@@ -51,7 +44,7 @@ typedef enum {
 #define fasttm(l,et,e)	gfasttm(G(l), et, e)
 
 #define ttypename(x)	luaT_typenames_[(x) + 1]
-#define objtypename(x)	ttypename(ttnov(x))
+#define objtypename(x)	ttypename(ttypenv(x))
 
 LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
 
@@ -61,15 +54,4 @@ LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
                                                        TMS event);
 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, 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 int luaT_callorderTM (lua_State *L, const TValue *p1,
-                                const TValue *p2, TMS event);
-
-
-
 #endif

lua.c

@@ -1,19 +1,17 @@
 /*
-** $Id: lua.c,v 1.225 2015/03/30 15:42:59 roberto Exp roberto $
+** $Id: lua.c,v 1.206 2012/09/29 20:07:06 roberto Exp $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
 
-#define lua_c
-
-#include "lprefix.h"
-
 
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define lua_c
+
 #include "lua.h"
 
 #include "lauxlib.h"
@@ -33,38 +31,28 @@
 #define LUA_MAXINPUT		512
 #endif
 
-#if !defined(LUA_INIT_VAR)
-#define LUA_INIT_VAR		"LUA_INIT"
+#if !defined(LUA_INIT)
+#define LUA_INIT		"LUA_INIT"
 #endif
 
-#define LUA_INITVARVERSION  \
-	LUA_INIT_VAR "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
+#define LUA_INITVERSION  \
+	LUA_INIT "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
 
 
 /*
 ** 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)	/* { */
-
+#if defined(LUA_USE_ISATTY)
 #include <unistd.h>
 #define lua_stdin_is_tty()	isatty(0)
-
-#elif defined(LUA_USE_WINDOWS)	/* }{ */
-
+#elif defined(LUA_WIN)
 #include <io.h>
+#include <stdio.h>
 #define lua_stdin_is_tty()	_isatty(_fileno(stdin))
-
-#else				/* }{ */
-
-/* ISO C definition */
+#else
 #define lua_stdin_is_tty()	1  /* assume stdin is a tty */
-
-#endif				/* } */
-
-#endif				/* } */
+#endif
 
 
 /*
@@ -73,27 +61,26 @@
 ** 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)	/* { */
+#if defined(LUA_USE_READLINE)
 
+#include <stdio.h>
 #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_saveline(L,idx) \
+        if (lua_rawlen(L,idx) > 0)  /* non-empty line? */ \
+          add_history(lua_tostring(L, idx));  /* add it to history */
 #define lua_freeline(L,b)	((void)L, free(b))
 
-#else				/* }{ */
+#elif !defined(lua_readline)
 
 #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_saveline(L,idx)	{ (void)L; (void)idx; }
 #define lua_freeline(L,b)	{ (void)L; (void)b; }
 
-#endif				/* } */
-
-#endif				/* } */
+#endif
 
 
 
@@ -103,40 +90,33 @@ static lua_State *globalL = NULL;
 static const char *progname = LUA_PROGNAME;
 
 
-/*
-** Hook set by signal function to stop the interpreter.
-*/
+
 static void lstop (lua_State *L, lua_Debug *ar) {
   (void)ar;  /* unused arg. */
-  lua_sethook(L, NULL, 0, 0);  /* reset hook */
+  lua_sethook(L, NULL, 0, 0);
   luaL_error(L, "interrupted!");
 }
 
 
-/*
-** Function to be called at a C signal. Because a C signal cannot
-** just change a Lua state (as there is no proper synchronization),
-** this function only sets a hook that, when called, will stop the
-** interpreter.
-*/
 static void laction (int i) {
-  signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
+  signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
+                              terminate process (default action) */
   lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
 }
 
 
 static void print_usage (const char *badoption) {
-  lua_writestringerror("%s: ", progname);
+  luai_writestringerror("%s: ", progname);
   if (badoption[1] == 'e' || badoption[1] == 'l')
-    lua_writestringerror("'%s' needs argument\n", badoption);
+    luai_writestringerror("'%s' needs argument\n", badoption);
   else
-    lua_writestringerror("unrecognized option '%s'\n", badoption);
-  lua_writestringerror(
+    luai_writestringerror("unrecognized option '%s'\n", badoption);
+  luai_writestringerror(
   "usage: %s [options] [script [args]]\n"
   "Available options are:\n"
-  "  -e stat  execute string 'stat'\n"
-  "  -i       enter interactive mode after executing 'script'\n"
-  "  -l name  require library 'name'\n"
+  "  -e stat  execute string " LUA_QL("stat") "\n"
+  "  -i       enter interactive mode after executing " LUA_QL("script") "\n"
+  "  -l name  require library " LUA_QL("name") "\n"
   "  -v       show version information\n"
   "  -E       ignore environment variables\n"
   "  --       stop handling options\n"
@@ -146,114 +126,101 @@ static void print_usage (const char *badoption) {
 }
 
 
-/*
-** Prints an error message, adding the program name in front of it
-** (if present)
-*/
 static void l_message (const char *pname, const char *msg) {
-  if (pname) lua_writestringerror("%s: ", pname);
-  lua_writestringerror("%s\n", msg);
+  if (pname) luai_writestringerror("%s: ", pname);
+  luai_writestringerror("%s\n", msg);
 }
 
 
-/*
-** Check whether 'status' is not OK and, if so, prints the error
-** message on the top of the stack. It assumes that the error object
-** is a string, as it was either generated by Lua or by 'msghandler'.
-*/
 static int report (lua_State *L, int status) {
-  if (status != LUA_OK) {
+  if (status != LUA_OK && !lua_isnil(L, -1)) {
     const char *msg = lua_tostring(L, -1);
+    if (msg == NULL) msg = "(error object is not a string)";
     l_message(progname, msg);
-    lua_pop(L, 1);  /* remove message */
+    lua_pop(L, 1);
+    /* force a complete garbage collection in case of errors */
+    lua_gc(L, LUA_GCCOLLECT, 0);
   }
   return status;
 }
 
 
-/*
-** Message handler used to run all chunks
-*/
-static int msghandler (lua_State *L) {
-  const char *msg = lua_tostring(L, 1);
-  if (msg == NULL) {  /* is error object not a string? */
-    if (luaL_callmeta(L, 1, "__tostring") &&  /* does it have a metamethod */
-        lua_type(L, -1) == LUA_TSTRING)  /* that produces a string? */
-      return 1;  /* that is the message */
-    else
-      msg = lua_pushfstring(L, "(error object is a %s value)",
-                               luaL_typename(L, 1));
+/* the next function is called unprotected, so it must avoid errors */
+static void finalreport (lua_State *L, int status) {
+  if (status != LUA_OK) {
+    const char *msg = (lua_type(L, -1) == LUA_TSTRING) ? lua_tostring(L, -1)
+                                                       : NULL;
+    if (msg == NULL) msg = "(error object is not a string)";
+    l_message(progname, msg);
+    lua_pop(L, 1);
   }
-  luaL_traceback(L, L, msg, 1);  /* append a standard traceback */
-  return 1;  /* return the traceback */
 }
 
 
-/*
-** Interface to 'lua_pcall', which sets appropriate message function
-** and C-signal handler. Used to run all chunks.
-*/
+static int traceback (lua_State *L) {
+  const char *msg = lua_tostring(L, 1);
+  if (msg)
+    luaL_traceback(L, L, msg, 1);
+  else if (!lua_isnoneornil(L, 1)) {  /* is there an error object? */
+    if (!luaL_callmeta(L, 1, "__tostring"))  /* try its 'tostring' metamethod */
+      lua_pushliteral(L, "(no error message)");
+  }
+  return 1;
+}
+
+
 static int docall (lua_State *L, int narg, int nres) {
   int status;
   int base = lua_gettop(L) - narg;  /* function index */
-  lua_pushcfunction(L, msghandler);  /* push message handler */
-  lua_insert(L, base);  /* put it under function and args */
+  lua_pushcfunction(L, traceback);  /* push traceback function */
+  lua_insert(L, base);  /* put it under chunk and args */
   globalL = L;  /* to be available to 'laction' */
-  signal(SIGINT, laction);  /* set C-signal handler */
+  signal(SIGINT, laction);
   status = lua_pcall(L, narg, nres, base);
-  signal(SIGINT, SIG_DFL); /* reset C-signal handler */
-  lua_remove(L, base);  /* remove message handler from the stack */
+  signal(SIGINT, SIG_DFL);
+  lua_remove(L, base);  /* remove traceback function */
   return status;
 }
 
 
 static void print_version (void) {
-  lua_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
-  lua_writeline();
+  luai_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
+  luai_writeline();
 }
 
 
-/*
-** Create the 'arg' table, which stores all arguments from the
-** command line ('argv'). It should be aligned so that, at index 0,
-** it has 'argv[script]', which is the script name. The arguments
-** to the script (everything after 'script') go to positive indices;
-** other arguments (before the script name) go to negative indices.
-** If there is no script name, assume interpreter's name as base.
-*/
-static void createargtable (lua_State *L, char **argv, int argc, int script) {
-  int i, narg;
-  if (script == argc) script = 0;  /* no script name? */
-  narg = argc - (script + 1);  /* number of positive indices */
-  lua_createtable(L, narg, script + 1);
-  for (i = 0; i < argc; i++) {
+static int getargs (lua_State *L, char **argv, int n) {
+  int narg;
+  int i;
+  int argc = 0;
+  while (argv[argc]) argc++;  /* count total number of arguments */
+  narg = argc - (n + 1);  /* number of arguments to the script */
+  luaL_checkstack(L, narg + 3, "too many arguments to script");
+  for (i=n+1; i < argc; i++)
     lua_pushstring(L, argv[i]);
-    lua_rawseti(L, -2, i - script);
+  lua_createtable(L, narg, n + 1);
+  for (i=0; i < argc; i++) {
+    lua_pushstring(L, argv[i]);
+    lua_rawseti(L, -2, i - n);
   }
-  lua_setglobal(L, "arg");
+  return narg;
 }
 
 
-static int dochunk (lua_State *L, int status) {
+static int dofile (lua_State *L, const char *name) {
+  int status = luaL_loadfile(L, name);
   if (status == LUA_OK) status = docall(L, 0, 0);
   return report(L, status);
 }
 
 
-static int dofile (lua_State *L, const char *name) {
-  return dochunk(L, luaL_loadfile(L, name));
-}
-
-
 static int dostring (lua_State *L, const char *s, const char *name) {
-  return dochunk(L, luaL_loadbuffer(L, s, strlen(s), name));
+  int status = luaL_loadbuffer(L, s, strlen(s), name);
+  if (status == LUA_OK) status = docall(L, 0, 0);
+  return report(L, status);
 }
 
 
-/*
-** Calls 'require(name)' and stores the result in a global variable
-** with the given name.
-*/
 static int dolibrary (lua_State *L, const char *name) {
   int status;
   lua_getglobal(L, "require");
@@ -265,9 +232,6 @@ static int dolibrary (lua_State *L, const char *name) {
 }
 
 
-/*
-** Returns the string to be used as a prompt by the interpreter.
-*/
 static const char *get_prompt (lua_State *L, int firstline) {
   const char *p;
   lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
@@ -280,12 +244,6 @@ static const char *get_prompt (lua_State *L, int firstline) {
 #define EOFMARK		"<eof>"
 #define marklen		(sizeof(EOFMARK)/sizeof(char) - 1)
 
-
-/*
-** Check whether 'status' signals a syntax error and the error
-** message at the top of the stack ends with the above mark for
-** incomplete statements.
-*/
 static int incomplete (lua_State *L, int status) {
   if (status == LUA_ERRSYNTAX) {
     size_t lmsg;
@@ -299,230 +257,163 @@ static int incomplete (lua_State *L, int status) {
 }
 
 
-/*
-** Prompt the user, read a line, and push it into the Lua stack.
-*/
 static int pushline (lua_State *L, int firstline) {
   char buffer[LUA_MAXINPUT];
   char *b = buffer;
   size_t l;
   const char *prmt = get_prompt(L, firstline);
   int readstatus = lua_readline(L, b, prmt);
+  lua_pop(L, 1);  /* remove result from 'get_prompt' */
   if (readstatus == 0)
-    return 0;  /* no input (prompt will be popped by caller) */
-  lua_pop(L, 1);  /* remove prompt */
+    return 0;  /* no input */
   l = strlen(b);
   if (l > 0 && b[l-1] == '\n')  /* line ends with newline? */
-    b[--l] = '\0';  /* remove it */
-  if (firstline && b[0] == '=')  /* for compatibility with 5.2, ... */
-    lua_pushfstring(L, "return %s", b + 1);  /* change '=' to 'return' */
+    b[l-1] = '\0';  /* remove it */
+  if (firstline && b[0] == '=')  /* first line starts with `=' ? */
+    lua_pushfstring(L, "return %s", b+1);  /* change it to `return' */
   else
-    lua_pushlstring(L, b, l);
+    lua_pushstring(L, b);
   lua_freeline(L, b);
   return 1;
 }
 
 
-/*
-** Try to compile line on the stack as 'return <line>;'; on return, stack
-** has either compiled chunk or original line (if compilation failed).
-*/
-static int addreturn (lua_State *L) {
-  const char *line = lua_tostring(L, -1);  /* original line */
-  const char *retline = lua_pushfstring(L, "return %s;", line);
-  int status = luaL_loadbuffer(L, retline, strlen(retline), "=stdin");
-  if (status == LUA_OK) {
-    lua_remove(L, -2);  /* remove modified line */
-    if (line[0] != '\0')  /* non empty? */
-      lua_saveline(L, line);  /* keep history */
-  }
-  else
-    lua_pop(L, 2);  /* pop result from 'luaL_loadbuffer' and modified line */
-  return status;
-}
-
-
-/*
-** Read multiple lines until a complete Lua statement
-*/
-static int multiline (lua_State *L) {
-  for (;;) {  /* repeat until gets a complete statement */
-    size_t len;
-    const char *line = lua_tolstring(L, 1, &len);  /* get what it has */
-    int status = luaL_loadbuffer(L, line, len, "=stdin");  /* try it */
-    if (!incomplete(L, status) || !pushline(L, 0)) {
-      lua_saveline(L, line);  /* keep history */
-      return status;  /* cannot or should not try to add continuation line */
-    }
-    lua_pushliteral(L, "\n");  /* add newline... */
-    lua_insert(L, -2);  /* ...between the two lines */
-    lua_concat(L, 3);  /* join them */
-  }
-}
-
-
-/*
-** Read a line and try to load (compile) it first as an expression (by
-** adding "return " in front of it) and second as a statement. Return
-** the final status of load/call with the resulting function (if any)
-** in the top of the stack.
-*/
 static int loadline (lua_State *L) {
   int status;
   lua_settop(L, 0);
   if (!pushline(L, 1))
     return -1;  /* no input */
-  if ((status = addreturn(L)) != LUA_OK)  /* 'return ...' did not work? */
-    status = multiline(L);  /* try as command, maybe with continuation lines */
-  lua_remove(L, 1);  /* remove line from the stack */
-  lua_assert(lua_gettop(L) == 1);
+  for (;;) {  /* repeat until gets a complete line */
+    size_t l;
+    const char *line = lua_tolstring(L, 1, &l);
+    status = luaL_loadbuffer(L, line, l, "=stdin");
+    if (!incomplete(L, status)) break;  /* cannot try to add lines? */
+    if (!pushline(L, 0))  /* no more input? */
+      return -1;
+    lua_pushliteral(L, "\n");  /* add a new line... */
+    lua_insert(L, -2);  /* ...between the two lines */
+    lua_concat(L, 3);  /* join them */
+  }
+  lua_saveline(L, 1);
+  lua_remove(L, 1);  /* remove line */
   return status;
 }
 
 
-/*
-** Prints (calling the Lua 'print' function) any values on the stack
-*/
-static void l_print (lua_State *L) {
-  int n = lua_gettop(L);
-  if (n > 0) {  /* any result to be printed? */
-    luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
-    lua_getglobal(L, "print");
-    lua_insert(L, 1);
-    if (lua_pcall(L, n, 0, 0) != LUA_OK)
-      l_message(progname, lua_pushfstring(L, "error calling 'print' (%s)",
-                                             lua_tostring(L, -1)));
-  }
-}
-
-
-/*
-** Do the REPL: repeatedly read (load) a line, evaluate (call) it, and
-** print any results.
-*/
-static void doREPL (lua_State *L) {
+static void dotty (lua_State *L) {
   int status;
   const char *oldprogname = progname;
-  progname = NULL;  /* no 'progname' on errors in interactive mode */
+  progname = NULL;
   while ((status = loadline(L)) != -1) {
-    if (status == LUA_OK)
-      status = docall(L, 0, LUA_MULTRET);
-    if (status == LUA_OK) l_print(L);
-    else report(L, status);
+    if (status == LUA_OK) status = docall(L, 0, LUA_MULTRET);
+    report(L, status);
+    if (status == LUA_OK && lua_gettop(L) > 0) {  /* any result to print? */
+      luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
+      lua_getglobal(L, "print");
+      lua_insert(L, 1);
+      if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != LUA_OK)
+        l_message(progname, lua_pushfstring(L,
+                               "error calling " LUA_QL("print") " (%s)",
+                               lua_tostring(L, -1)));
+    }
   }
   lua_settop(L, 0);  /* clear stack */
-  lua_writeline();
+  luai_writeline();
   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) {
+static int handle_script (lua_State *L, char **argv, int n) {
   int status;
-  const char *fname = argv[0];
-  if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
+  const char *fname;
+  int narg = getargs(L, argv, n);  /* collect arguments */
+  lua_setglobal(L, "arg");
+  fname = argv[n];
+  if (strcmp(fname, "-") == 0 && strcmp(argv[n-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);
-  }
+  lua_insert(L, -(narg+1));
+  if (status == LUA_OK)
+    status = docall(L, narg, LUA_MULTRET);
+  else
+    lua_pop(L, narg);
   return report(L, status);
 }
 
 
+/* check that argument has no extra characters at the end */
+#define noextrachars(x)		{if ((x)[2] != '\0') return -1;}
 
-/* 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;
+/* indices of various argument indicators in array args */
+#define has_i		0	/* -i */
+#define has_v		1	/* -v */
+#define has_e		2	/* -e */
+#define has_E		3	/* -E */
+
+#define num_has		4	/* number of 'has_*' */
+
+
+static int collectargs (char **argv, int *args) {
   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 '-' */
+        return i;
+    switch (argv[i][1]) {  /* option */
+      case '-':
+        noextrachars(argv[i]);
+        return (argv[i+1] != NULL ? i+1 : 0);
+      case '\0':
+        return i;
       case 'E':
-        if (argv[i][2] != '\0')  /* extra characters after 1st? */
-          return has_error;  /* invalid option */
-        args |= has_E;
+        args[has_E] = 1;
         break;
       case 'i':
-        args |= has_i;  /* (-i implies -v) *//* FALLTHROUGH */ 
+        noextrachars(argv[i]);
+        args[has_i] = 1;  /* go through */
       case 'v':
-        if (argv[i][2] != '\0')  /* extra characters after 1st? */
-          return has_error;  /* invalid option */
-        args |= has_v;
+        noextrachars(argv[i]);
+        args[has_v] = 1;
         break;
       case 'e':
-        args |= has_e;  /* FALLTHROUGH */
+        args[has_e] = 1;  /* go through */
       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 */
+            return -(i - 1);  /* no next argument or it is another option */
         }
         break;
-      default:  /* invalid option */
-        return has_error;
+      default:  /* invalid option; return its index... */
+        return -i;  /* ...as a negative value */
     }
   }
-  *first = i;  /* no script name */
-  return args;
+  return 0;
 }
 
 
-/*
-** 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;
+    lua_assert(argv[i][0] == '-');
+    switch (argv[i][1]) {  /* option */
+      case 'e': {
+        const char *chunk = argv[i] + 2;
+        if (*chunk == '\0') chunk = argv[++i];
+        lua_assert(chunk != NULL);
+        if (dostring(L, chunk, "=(command line)") != LUA_OK)
+          return 0;
+        break;
+      }
+      case 'l': {
+        const char *filename = argv[i] + 2;
+        if (*filename == '\0') filename = argv[++i];
+        lua_assert(filename != NULL);
+        if (dolibrary(L, filename) != LUA_OK)
+          return 0;  /* stop if file fails */
+        break;
+      }
+      default: break;
     }
   }
   return 1;
@@ -530,10 +421,10 @@ static int runargs (lua_State *L, char **argv, int n) {
 
 
 static int handle_luainit (lua_State *L) {
-  const char *name = "=" LUA_INITVARVERSION;
+  const char *name = "=" LUA_INITVERSION;
   const char *init = getenv(name + 1);
   if (init == NULL) {
-    name = "=" LUA_INIT_VAR;
+    name = "=" LUA_INIT;
     init = getenv(name + 1);  /* try alternative name */
   }
   if (init == NULL) return LUA_OK;
@@ -544,44 +435,40 @@ static int handle_luainit (lua_State *L) {
 }
 
 
-/*
-** Main body of stand-alone interpreter (to be called in protected mode).
-** Reads the options and handles them all.
-*/
 static int pmain (lua_State *L) {
   int argc = (int)lua_tointeger(L, 1);
   char **argv = (char **)lua_touserdata(L, 2);
   int script;
-  int args = collectargs(argv, &script);
-  luaL_checkversion(L);  /* check that interpreter has correct version */
+  int args[num_has];
+  args[has_i] = args[has_v] = args[has_e] = args[has_E] = 0;
   if (argv[0] && argv[0][0]) progname = argv[0];
-  if (args == has_error) {  /* bad arg? */
-    print_usage(argv[script]);  /* 'script' has index of bad arg. */
+  script = collectargs(argv, args);
+  if (script < 0) {  /* invalid arg? */
+    print_usage(argv[-script]);
     return 0;
   }
-  if (args & has_v)  /* option '-v'? */
-    print_version();
-  if (args & has_E) {  /* option '-E'? */
+  if (args[has_v]) print_version();
+  if (args[has_E]) {  /* option '-E'? */
     lua_pushboolean(L, 1);  /* signal for libraries to ignore env. vars. */
     lua_setfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
   }
-  luaL_openlibs(L);  /* open standard libraries */
-  createargtable(L, argv, argc, script);  /* create table 'arg' */
-  if (!(args & has_E)) {  /* no option '-E'? */
-    if (handle_luainit(L) != LUA_OK)  /* run LUA_INIT */
-      return 0;  /* error running LUA_INIT */
-  }
-  if (!runargs(L, argv, script))  /* execute arguments -e and -l */
-    return 0;  /* something failed */
-  if (script < argc &&  /* execute main script (if there is one) */
-      handle_script(L, argv + script) != LUA_OK)
-    return 0;
-  if (args & has_i)  /* -i option? */
-    doREPL(L);  /* do read-eval-print loop */
-  else if (script == argc && !(args & (has_e | has_v))) {  /* no arguments? */
-    if (lua_stdin_is_tty()) {  /* running in interactive mode? */
+  /* open standard libraries */
+  luaL_checkversion(L);
+  lua_gc(L, LUA_GCSTOP, 0);  /* stop collector during initialization */
+  luaL_openlibs(L);  /* open libraries */
+  lua_gc(L, LUA_GCRESTART, 0);
+  if (!args[has_E] && handle_luainit(L) != LUA_OK)
+    return 0;  /* error running LUA_INIT */
+  /* execute arguments -e and -l */
+  if (!runargs(L, argv, (script > 0) ? script : argc)) return 0;
+  /* execute main script (if there is one) */
+  if (script && handle_script(L, argv, script) != LUA_OK) return 0;
+  if (args[has_i])  /* -i option? */
+    dotty(L);
+  else if (script == 0 && !args[has_e] && !args[has_v]) {  /* no arguments? */
+    if (lua_stdin_is_tty()) {
       print_version();
-      doREPL(L);  /* do read-eval-print loop */
+      dotty(L);
     }
     else dofile(L, NULL);  /* executes stdin as a file */
   }
@@ -597,12 +484,13 @@ int main (int argc, char **argv) {
     l_message(argv[0], "cannot create state: not enough memory");
     return EXIT_FAILURE;
   }
-  lua_pushcfunction(L, &pmain);  /* to call 'pmain' in protected mode */
+  /* call 'pmain' in protected mode */
+  lua_pushcfunction(L, &pmain);
   lua_pushinteger(L, argc);  /* 1st argument */
   lua_pushlightuserdata(L, argv); /* 2nd argument */
-  status = lua_pcall(L, 2, 1, 0);  /* do the call */
+  status = lua_pcall(L, 2, 1, 0);
   result = lua_toboolean(L, -1);  /* get result */
-  report(L, status);
+  finalreport(L, status);
   lua_close(L);
   return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
 }

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.328 2015/06/03 13:03:38 roberto Exp roberto $
+** $Id: lua.h,v 1.285.1.3 2014/05/07 14:15:55 roberto Exp roberto $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -17,9 +17,9 @@
 
 
 #define LUA_VERSION_MAJOR	"5"
-#define LUA_VERSION_MINOR	"3"
-#define LUA_VERSION_NUM		503
-#define LUA_VERSION_RELEASE	"2"
+#define LUA_VERSION_MINOR	"2"
+#define LUA_VERSION_NUM		502
+#define LUA_VERSION_RELEASE	"4"
 
 #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
@@ -28,18 +28,16 @@
 
 
 /* mark for precompiled code ('<esc>Lua') */
-#define LUA_SIGNATURE	"\x1bLua"
+#define LUA_SIGNATURE	"\033Lua"
 
 /* option for multiple returns in 'lua_pcall' and 'lua_call' */
 #define LUA_MULTRET	(-1)
 
 
 /*
-** Pseudo-indices
-** (-LUAI_MAXSTACK is the minimum valid index; we keep some free empty
-** space after that to help overflow detection)
+** pseudo-indices
 */
-#define LUA_REGISTRYINDEX	(-LUAI_MAXSTACK - 1000)
+#define LUA_REGISTRYINDEX	LUAI_FIRSTPSEUDOIDX
 #define lua_upvalueindex(i)	(LUA_REGISTRYINDEX - (i))
 
 
@@ -55,6 +53,22 @@
 
 typedef struct lua_State lua_State;
 
+typedef int (*lua_CFunction) (lua_State *L);
+
+
+/*
+** functions that read/write blocks when loading/dumping Lua chunks
+*/
+typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
+
+typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
+
+
+/*
+** prototype for memory-allocation functions
+*/
+typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
+
 
 /*
 ** basic types
@@ -95,34 +109,6 @@ typedef LUA_INTEGER lua_Integer;
 /* unsigned integer type */
 typedef LUA_UNSIGNED lua_Unsigned;
 
-/* type for continuation-function contexts */
-typedef LUA_KCONTEXT lua_KContext;
-
-
-/*
-** Type for C functions registered with Lua
-*/
-typedef int (*lua_CFunction) (lua_State *L);
-
-/*
-** Type for continuation functions
-*/
-typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx);
-
-
-/*
-** Type for functions that read/write blocks when loading/dumping Lua chunks
-*/
-typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
-
-typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
-
-
-/*
-** Type for memory-allocation functions
-*/
-typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
-
 
 
 /*
@@ -159,9 +145,11 @@ LUA_API int   (lua_absindex) (lua_State *L, int idx);
 LUA_API int   (lua_gettop) (lua_State *L);
 LUA_API void  (lua_settop) (lua_State *L, int idx);
 LUA_API void  (lua_pushvalue) (lua_State *L, int idx);
-LUA_API void  (lua_rotate) (lua_State *L, int idx, int n);
+LUA_API void  (lua_remove) (lua_State *L, int idx);
+LUA_API void  (lua_insert) (lua_State *L, int idx);
+LUA_API void  (lua_replace) (lua_State *L, int idx);
 LUA_API void  (lua_copy) (lua_State *L, int fromidx, int toidx);
-LUA_API int   (lua_checkstack) (lua_State *L, int n);
+LUA_API int   (lua_checkstack) (lua_State *L, int sz);
 
 LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
 
@@ -173,13 +161,13 @@ LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
 LUA_API int             (lua_isnumber) (lua_State *L, int idx);
 LUA_API int             (lua_isstring) (lua_State *L, int idx);
 LUA_API int             (lua_iscfunction) (lua_State *L, int idx);
-LUA_API int             (lua_isinteger) (lua_State *L, int idx);
 LUA_API int             (lua_isuserdata) (lua_State *L, int idx);
 LUA_API int             (lua_type) (lua_State *L, int idx);
 LUA_API const char     *(lua_typename) (lua_State *L, int tp);
 
 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 lua_Unsigned    (lua_tounsignedx) (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 size_t          (lua_rawlen) (lua_State *L, int idx);
@@ -193,20 +181,13 @@ LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
 ** Comparison and arithmetic functions
 */
 
-#define LUA_OPADD	0	/* ORDER TM, ORDER OP */
+#define LUA_OPADD	0	/* ORDER TM */
 #define LUA_OPSUB	1
 #define LUA_OPMUL	2
-#define LUA_OPMOD	3
-#define LUA_OPPOW	4
-#define LUA_OPDIV	5
-#define LUA_OPIDIV	6
-#define LUA_OPBAND	7
-#define LUA_OPBOR	8
-#define LUA_OPBXOR	9
-#define LUA_OPSHL	10
-#define LUA_OPSHR	11
-#define LUA_OPUNM	12
-#define LUA_OPBNOT	13
+#define LUA_OPDIV	3
+#define LUA_OPMOD	4
+#define LUA_OPPOW	5
+#define LUA_OPUNM	6
 
 LUA_API void  (lua_arith) (lua_State *L, int op);
 
@@ -224,7 +205,8 @@ LUA_API int   (lua_compare) (lua_State *L, int idx1, int idx2, int op);
 LUA_API void        (lua_pushnil) (lua_State *L);
 LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
 LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
-LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t len);
+LUA_API void        (lua_pushunsigned) (lua_State *L, lua_Unsigned n);
+LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
 LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
 LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
                                                       va_list argp);
@@ -238,29 +220,26 @@ LUA_API int   (lua_pushthread) (lua_State *L);
 /*
 ** get functions (Lua -> stack)
 */
-LUA_API int (lua_getglobal) (lua_State *L, const char *name);
-LUA_API int (lua_gettable) (lua_State *L, int idx);
-LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
-LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
-LUA_API int (lua_rawget) (lua_State *L, int idx);
-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_getglobal) (lua_State *L, const char *var);
+LUA_API void  (lua_gettable) (lua_State *L, int idx);
+LUA_API void  (lua_getfield) (lua_State *L, int idx, const char *k);
+LUA_API void  (lua_rawget) (lua_State *L, int idx);
+LUA_API void  (lua_rawgeti) (lua_State *L, int idx, int n);
+LUA_API void  (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_newuserdata) (lua_State *L, size_t sz);
 LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
-LUA_API int  (lua_getuservalue) (lua_State *L, int idx);
+LUA_API void  (lua_getuservalue) (lua_State *L, int idx);
 
 
 /*
 ** set functions (stack -> Lua)
 */
-LUA_API void  (lua_setglobal) (lua_State *L, const char *name);
+LUA_API void  (lua_setglobal) (lua_State *L, const char *var);
 LUA_API void  (lua_settable) (lua_State *L, int idx);
 LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
-LUA_API void  (lua_seti) (lua_State *L, int idx, lua_Integer n);
 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_rawseti) (lua_State *L, int idx, int 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 void  (lua_setuservalue) (lua_State *L, int idx);
@@ -269,31 +248,31 @@ LUA_API void  (lua_setuservalue) (lua_State *L, int idx);
 /*
 ** 'load' and 'call' functions (load and run Lua code)
 */
-LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults,
-                           lua_KContext ctx, lua_KFunction k);
+LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults, int ctx,
+                           lua_CFunction k);
 #define lua_call(L,n,r)		lua_callk(L, (n), (r), 0, NULL)
 
+LUA_API int   (lua_getctx) (lua_State *L, int *ctx);
+
 LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
-                            lua_KContext ctx, lua_KFunction k);
+                            int ctx, lua_CFunction k);
 #define lua_pcall(L,n,r,f)	lua_pcallk(L, (n), (r), (f), 0, NULL)
 
 LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,
-                          const char *chunkname, const char *mode);
+                                        const char *chunkname,
+                                        const char *mode);
 
-LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
+LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
 
 
 /*
 ** coroutine functions
 */
-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);
-LUA_API int  (lua_status)     (lua_State *L);
-LUA_API int (lua_isyieldable) (lua_State *L);
-
+LUA_API int  (lua_yieldk) (lua_State *L, int nresults, int ctx,
+                           lua_CFunction k);
 #define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)
-
+LUA_API int  (lua_resume) (lua_State *L, lua_State *from, int narg);
+LUA_API int  (lua_status) (lua_State *L);
 
 /*
 ** garbage-collection function and options
@@ -307,7 +286,10 @@ LUA_API int (lua_isyieldable) (lua_State *L);
 #define LUA_GCSTEP		5
 #define LUA_GCSETPAUSE		6
 #define LUA_GCSETSTEPMUL	7
+#define LUA_GCSETMAJORINC	8
 #define LUA_GCISRUNNING		9
+#define LUA_GCGEN		10
+#define LUA_GCINC		11
 
 LUA_API int (lua_gc) (lua_State *L, int what, int data);
 
@@ -323,23 +305,20 @@ LUA_API int   (lua_next) (lua_State *L, int idx);
 LUA_API void  (lua_concat) (lua_State *L, int n);
 LUA_API void  (lua_len)    (lua_State *L, int idx);
 
-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);
 
 
 
 /*
-** {==============================================================
+** ===============================================================
 ** some useful macros
 ** ===============================================================
 */
 
-#define lua_getextraspace(L)	((void *)((char *)(L) - LUA_EXTRASPACE))
-
-#define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
-#define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)
+#define lua_tonumber(L,i)	lua_tonumberx(L,i,NULL)
+#define lua_tointeger(L,i)	lua_tointegerx(L,i,NULL)
+#define lua_tounsigned(L,i)	lua_tounsignedx(L,i,NULL)
 
 #define lua_pop(L,n)		lua_settop(L, -(n)-1)
 
@@ -358,7 +337,8 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 #define lua_isnone(L,n)		(lua_type(L, (n)) == LUA_TNONE)
 #define lua_isnoneornil(L, n)	(lua_type(L, (n)) <= 0)
 
-#define lua_pushliteral(L, s)	lua_pushstring(L, "" s)
+#define lua_pushliteral(L, s)	\
+	lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
 
 #define lua_pushglobaltable(L)  \
 	lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS)
@@ -366,28 +346,6 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 #define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)
 
 
-#define lua_insert(L,idx)	lua_rotate(L, (idx), 1)
-
-#define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))
-
-#define lua_replace(L,idx)	(lua_copy(L, -1, (idx)), lua_pop(L, 1))
-
-/* }============================================================== */
-
-
-/*
-** {==============================================================
-** compatibility macros for unsigned conversions
-** ===============================================================
-*/
-#if defined(LUA_COMPAT_APIINTCASTS)
-
-#define lua_pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
-#define lua_tounsignedx(L,i,is)	((lua_Unsigned)lua_tointegerx(L,i,is))
-#define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
-
-#endif
-/* }============================================================== */
 
 /*
 ** {======================================================================
@@ -432,7 +390,7 @@ LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
 LUA_API void  (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
                                                int fidx2, int n2);
 
-LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
+LUA_API int (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
 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);

luaconf.h

@@ -1,173 +1,89 @@
 /*
-** $Id: luaconf.h,v 1.253 2015/06/24 18:23:57 roberto Exp roberto $
+** $Id: luaconf.h,v 1.176.1.1 2013/04/12 18:48:47 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
 
 
-#ifndef luaconf_h
-#define luaconf_h
+#ifndef lconfig_h
+#define lconfig_h
 
 #include <limits.h>
 #include <stddef.h>
 
 
 /*
-** ===================================================================
+** ==================================================================
 ** Search for "@@" to find all configurable definitions.
 ** ===================================================================
 */
 
 
 /*
-** {====================================================================
-** System Configuration: macros to adapt (if needed) Lua to some
-** particular platform, for instance compiling it with 32-bit numbers or
-** restricting it to C89.
-** =====================================================================
+@@ LUA_ANSI controls the use of non-ansi features.
+** CHANGE it (define it) if you want Lua to avoid the use of any
+** non-ansi feature or library.
 */
-
-/*
-@@ 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
-** or Windows-specific features on Windows.
-*/
-/* #define LUA_USE_C89 */
-
-
-/*
-** By default, Lua on Windows use (some) specific Windows features
-*/
-#if !defined(LUA_USE_C89) && defined(_WIN32) && !defined(_WIN32_WCE)
-#define LUA_USE_WINDOWS  /* enable goodies for regular Windows */
+#if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
+#define LUA_ANSI
 #endif
 
 
-#if defined(LUA_USE_WINDOWS)
-#define LUA_DL_DLL	/* enable support for DLL */
-#define LUA_USE_C89	/* broadly, Windows is C89 */
+#if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)
+#define LUA_WIN		/* enable goodies for regular Windows platforms */
 #endif
 
+#if defined(LUA_WIN)
+#define LUA_DL_DLL
+#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
+#endif
+
+
 
 #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 */
+#define LUA_USE_STRTODHEX	/* assume 'strtod' handles hex formats */
+#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
+#define LUA_USE_LONGLONG	/* assume support for long long */
 #endif
 
-
 #if defined(LUA_USE_MACOSX)
 #define LUA_USE_POSIX
-#define LUA_USE_DLOPEN		/* MacOS does not need -ldl */
+#define LUA_USE_DLOPEN		/* does not need -ldl */
 #define LUA_USE_READLINE	/* needs an extra library: -lreadline */
-#endif
-
-
-/*
-@@ 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
+#define LUA_USE_STRTODHEX	/* assume 'strtod' handles hex formats */
+#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
+#define LUA_USE_LONGLONG	/* assume support for long long */
 #endif
 
 
 
 /*
-@@ LUAI_BITSINT defines the (minimum) number of bits in an 'int'.
+@@ LUA_USE_POSIX includes all functionality listed as X/Open System
+@* Interfaces Extension (XSI).
+** CHANGE it (define it) if your system is XSI compatible.
 */
-/* 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
+#if defined(LUA_USE_POSIX)
+#define LUA_USE_MKSTEMP
+#define LUA_USE_ISATTY
+#define LUA_USE_POPEN
+#define LUA_USE_ULONGJMP
+#define LUA_USE_GMTIME_R
 #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 (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').
-*/
-
-/* predefined options for LUA_INT_TYPE */
-#define LUA_INT_INT		1
-#define LUA_INT_LONG		2
-#define LUA_INT_LONGLONG	3
-
-/* predefined options for LUA_FLOAT_TYPE */
-#define LUA_FLOAT_FLOAT		1
-#define LUA_FLOAT_DOUBLE	2
-#define LUA_FLOAT_LONGDOUBLE	3
-
-#if defined(LUA_32BITS)		/* { */
-/*
-** 32-bit integers and 'float'
-*/
-#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 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
-
-#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.
-** ===================================================================
-*/
 
 /*
 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
-** Lua libraries.
+@* Lua libraries.
 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
-** C libraries.
+@* C libraries.
 ** CHANGE them if your machine has a non-conventional directory
 ** 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)	/* { */
 /*
 ** In Windows, any exclamation mark ('!') in the path is replaced by the
@@ -175,26 +91,21 @@
 */
 #define LUA_LDIR	"!\\lua\\"
 #define LUA_CDIR	"!\\"
-#define LUA_SHRDIR	"!\\..\\share\\lua\\" LUA_VDIR "\\"
 #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"
+		LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" ".\\?.lua"
 #define LUA_CPATH_DEFAULT \
-		LUA_CDIR"?.dll;" \
-		LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
-		LUA_CDIR"loadall.dll;" ".\\?.dll"
+		LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"
 
 #else			/* }{ */
 
+#define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
 #define LUA_ROOT	"/usr/local/"
-#define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR "/"
-#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR "/"
+#define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR
+#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
-		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
-		"./?.lua;" "./?/init.lua"
+		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" "./?.lua"
 #define LUA_CPATH_DEFAULT \
 		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
 #endif			/* } */
@@ -211,14 +122,14 @@
 #define LUA_DIRSEP	"/"
 #endif
 
-/* }================================================================== */
-
 
 /*
-** {==================================================================
-** Marks for exported symbols in the C code
-** ===================================================================
+@@ LUA_ENV is the name of the variable that holds the current
+@@ environment, used to access global names.
+** CHANGE it if you do not like this name.
 */
+#define LUA_ENV		"_ENV"
+
 
 /*
 @@ LUA_API is a mark for all core API functions.
@@ -251,10 +162,10 @@
 
 /*
 @@ LUAI_FUNC is a mark for all extern functions that are not to be
-** exported to outside modules.
+@* exported to outside modules.
 @@ 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).
+@* 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
 ** when Lua is compiled as a shared library. Not all elf targets support
@@ -266,14 +177,60 @@
 #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
     defined(__ELF__)		/* { */
 #define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
-#else				/* }{ */
-#define LUAI_FUNC	extern
-#endif				/* } */
-
 #define LUAI_DDEC	LUAI_FUNC
 #define LUAI_DDEF	/* empty */
 
-/* }================================================================== */
+#else				/* }{ */
+#define LUAI_FUNC	extern
+#define LUAI_DDEC	extern
+#define LUAI_DDEF	/* empty */
+#endif				/* } */
+
+
+
+/*
+@@ LUA_QL describes how error messages quote program elements.
+** CHANGE it if you want a different appearance.
+*/
+#define LUA_QL(x)	"'" x "'"
+#define LUA_QS		LUA_QL("%s")
+
+
+/*
+@@ LUA_IDSIZE gives the maximum size for the description of the source
+@* of a function in debug information.
+** CHANGE it if you want a different size.
+*/
+#define LUA_IDSIZE	60
+
+
+/*
+@@ luai_writestring/luai_writeline define how 'print' prints its results.
+** They are only used in libraries and the stand-alone program. (The #if
+** avoids including 'stdio.h' everywhere.)
+*/
+#if defined(LUA_LIB) || defined(lua_c)
+#include <stdio.h>
+#define luai_writestring(s,l)	fwrite((s), sizeof(char), (l), stdout)
+#define luai_writeline()	(luai_writestring("\n", 1), fflush(stdout))
+#endif
+
+/*
+@@ luai_writestringerror defines how to print error messages.
+** (A format string with one argument is enough for Lua...)
+*/
+#define luai_writestringerror(s,p) \
+	(fprintf(stderr, (s), (p)), fflush(stderr))
+
+
+/*
+@@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is,
+** strings that are internalized. (Cannot be smaller than reserved words
+** or tags for metamethods, as these strings must be internalized;
+** #("function") = 8, #("__newindex") = 10.)
+*/
+#define LUAI_MAXSHORTLEN        40
+
 
 
 /*
@@ -283,44 +240,11 @@
 */
 
 /*
-@@ 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.
+@@ LUA_COMPAT_ALL controls all compatibility options.
 ** You can define it to get all options, or change specific options
 ** to fit your specific needs.
 */
-#if defined(LUA_COMPAT_5_2)	/* { */
-
-/*
-@@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
-** functions in the mathematical library.
-*/
-#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.)
-*/
-#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
+#if defined(LUA_COMPAT_ALL)	/* { */
 
 /*
 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
@@ -381,320 +305,47 @@
 
 #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.
-** Change these definitions if no predefined LUA_FLOAT_* / LUA_INT_*
-** satisfy your needs.
-** ===================================================================
+@@ LUAI_BITSINT defines the number of bits in an int.
+** CHANGE here if Lua cannot automatically detect the number of bits of
+** your machine. Probably you do not need to change this.
 */
-
-/*
-@@ LUA_NUMBER is the floating-point type used by Lua.
-@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
-@@ over a floating number.
-@@ 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 numeric string to a number.
-*/
-
-
-/* The following definitions are good for most cases here */
-
-#define l_floor(x)		(l_mathop(floor)(x))
-
-#define lua_number2str(s,sz,n)	l_sprintf((s), sz, LUA_NUMBER_FMT, (n))
-
-/*
-@@ 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) && \
-   (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
-      (*(p) = (LUA_INTEGER)(n), 1))
-
-
-/* now the variable definitions */
-
-#if LUA_FLOAT_TYPE == LUA_FLOAT_FLOAT		/* { single float */
-
-#define LUA_NUMBER	float
-
-#define l_mathlim(n)		(FLT_##n)
-
-#define LUAI_UACNUMBER	double
-
-#define LUA_NUMBER_FRMLEN	""
-#define LUA_NUMBER_FMT		"%.7g"
-
-#define l_mathop(op)		op##f
-
-#define lua_str2number(s,p)	strtof((s), (p))
-
-
-#elif LUA_FLOAT_TYPE == LUA_FLOAT_LONGDOUBLE	/* }{ long double */
-
-#define LUA_NUMBER	long double
-
-#define l_mathlim(n)		(LDBL_##n)
-
-#define LUAI_UACNUMBER	long double
-
-#define LUA_NUMBER_FRMLEN	"L"
-#define LUA_NUMBER_FMT		"%.19Lg"
-
-#define l_mathop(op)		op##l
-
-#define lua_str2number(s,p)	strtold((s), (p))
-
-#elif LUA_FLOAT_TYPE == LUA_FLOAT_DOUBLE	/* }{ double */
-
-#define LUA_NUMBER	double
-
-#define l_mathlim(n)		(DBL_##n)
-
-#define LUAI_UACNUMBER	double
-
-#define LUA_NUMBER_FRMLEN	""
-#define LUA_NUMBER_FMT		"%.14g"
-
-#define l_mathop(op)		op
-
-#define lua_str2number(s,p)	strtod((s), (p))
-
-#else						/* }{ */
-
-#error "numeric float type not defined"
-
-#endif					/* } */
-
-
-
-/*
-@@ LUA_INTEGER is the integer type used by Lua.
-**
-@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
-**
-@@ LUAI_UACINT is the result of an 'usual argument conversion'
-@@ 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_integer2str converts an integer to a string.
-*/
-
-
-/* The following definitions are good for most cases here */
-
-#define LUA_INTEGER_FMT		"%" LUA_INTEGER_FRMLEN "d"
-#define lua_integer2str(s,sz,n)	l_sprintf((s), sz, LUA_INTEGER_FMT, (n))
-
-#define LUAI_UACINT		LUA_INTEGER
-
-/*
-** use LUAI_UACINT here to avoid problems with promotions (which
-** can turn a comparison between unsigneds into a signed comparison)
-*/
-#define LUA_UNSIGNED		unsigned LUAI_UACINT
-
-
-/* now the variable definitions */
-
-#if LUA_INT_TYPE == LUA_INT_INT		/* { int */
-
-#define LUA_INTEGER		int
-#define LUA_INTEGER_FRMLEN	""
-
-#define LUA_MAXINTEGER		INT_MAX
-#define LUA_MININTEGER		INT_MIN
-
-#elif LUA_INT_TYPE == LUA_INT_LONG	/* }{ long */
-
-#define LUA_INTEGER		long
-#define LUA_INTEGER_FRMLEN	"l"
-
-#define LUA_MAXINTEGER		LONG_MAX
-#define LUA_MININTEGER		LONG_MIN
-
-#elif LUA_INT_TYPE == LUA_INT_LONGLONG	/* }{ long long */
-
-/* use presence of macro LLONG_MAX as proxy for C99 compliance */
-#if defined(LLONG_MAX)		/* { */
-/* use ISO C99 stuff */
-
-#define LUA_INTEGER		long long
-#define LUA_INTEGER_FRMLEN	"ll"
-
-#define LUA_MAXINTEGER		LLONG_MAX
-#define LUA_MININTEGER		LLONG_MIN
-
-#elif defined(LUA_USE_WINDOWS) /* }{ */
-/* in Windows, can use specific Windows types */
-
-#define LUA_INTEGER		__int64
-#define LUA_INTEGER_FRMLEN	"I64"
-
-#define LUA_MAXINTEGER		_I64_MAX
-#define LUA_MININTEGER		_I64_MIN
-
+/* avoid overflows in comparison */
+#if INT_MAX-20 < 32760		/* { */
+#define LUAI_BITSINT	16
+#elif INT_MAX > 2147483640L	/* }{ */
+/* int has at least 32 bits */
+#define LUAI_BITSINT	32
 #else				/* }{ */
-
-#error "Compiler does not support 'long long'. Use option '-DLUA_32BITS' \
-  or '-DLUA_C89_NUMBERS' (see file 'luaconf.h' for details)"
-
+#error "you must define LUA_BITSINT with number of bits in an integer"
 #endif				/* } */
 
+
+/*
+@@ LUA_INT32 is a signed integer with exactly 32 bits.
+@@ LUAI_UMEM is an unsigned integer big enough to count the total
+@* memory used by Lua.
+@@ LUAI_MEM is a signed integer big enough to count the total memory
+@* used by Lua.
+** CHANGE here if for some weird reason the default definitions are not
+** good enough for your machine. Probably you do not need to change
+** this.
+*/
+#if LUAI_BITSINT >= 32		/* { */
+#define LUA_INT32	int
+#define LUAI_UMEM	size_t
+#define LUAI_MEM	ptrdiff_t
 #else				/* }{ */
-
-#error "numeric integer type not defined"
-
+/* 16-bit ints */
+#define LUA_INT32	long
+#define LUAI_UMEM	unsigned long
+#define LUAI_MEM	long
 #endif				/* } */
 
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Dependencies with C99 and other C details
-** ===================================================================
-*/
-
-/*
-@@ l_sprintf is equivalent to 'snprintf' or 'sprintf' in C89.
-** (All uses in Lua have only one format item.)
-*/
-#if !defined(LUA_USE_C89)
-#define l_sprintf(s,sz,f,i)	snprintf(s,sz,f,i)
-#else
-#define l_sprintf(s,sz,f,i)	((void)(sz), sprintf(s,f,i))
-#endif
-
-
-/*
-@@ 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.
-*/
-#if !defined(LUA_USE_C89)
-#define lua_strx2number(s,p)		lua_str2number(s,p)
-#endif
-
-
-/*
-@@ 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.
-*/
-#if !defined(LUA_USE_C89)
-#define lua_number2strx(L,b,sz,f,n)	l_sprintf(b,sz,f,n)
-#endif
-
-
-/*
-** 'strtof' and 'opf' variants for math functions are not valid in
-** C89. Otherwise, the macro 'HUGE_VALF' is a good proxy for testing the
-** availability of these variants. ('math.h' is already included in
-** all files that use these macros.)
-*/
-#if defined(LUA_USE_C89) || (defined(HUGE_VAL) && !defined(HUGE_VALF))
-#undef l_mathop  /* variants not available */
-#undef lua_str2number
-#define l_mathop(op)		(lua_Number)op  /* no variant */
-#define lua_str2number(s,p)	((lua_Number)strtod((s), (p)))
-#endif
-
-
-/*
-@@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
-** functions.  It must be a numerical type; Lua will use 'intptr_t' if
-** available, otherwise it will use 'ptrdiff_t' (the nearest thing to
-** 'intptr_t' in C89)
-*/
-#define LUA_KCONTEXT	ptrdiff_t
-
-#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
-    __STDC_VERSION__ >= 199901L
-#include <stdint.h>
-#if defined(INTPTR_MAX)  /* even in C99 this type is optional */
-#undef LUA_KCONTEXT
-#define LUA_KCONTEXT	intptr_t
-#endif
-#endif
-
-
-/*
-@@ 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 header 'locale.h'.)
-*/
-#if !defined(lua_getlocaledecpoint)
-#define lua_getlocaledecpoint()		(localeconv()->decimal_point[0])
-#endif
-
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** Language Variations
-** =====================================================================
-*/
-
-/*
-@@ LUA_NOCVTN2S/LUA_NOCVTS2N control how Lua performs some
-** coercions. Define LUA_NOCVTN2S to turn off automatic coercion from
-** numbers to strings. Define LUA_NOCVTS2N to turn off automatic
-** coercion from strings to numbers.
-*/
-/* #define LUA_NOCVTN2S */
-/* #define LUA_NOCVTS2N */
-
-
-/*
-@@ LUA_USE_APICHECK turns on several consistency checks on the C API.
-** Define it as a help when debugging C code.
-*/
-#if defined(LUA_USE_APICHECK)
-#include <assert.h>
-#define luai_apicheck(l,e)	assert(e)
-#endif
-
-/* }================================================================== */
-
-
-/*
-** {==================================================================
-** 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). You probably do not want/need to change them.
-** =====================================================================
-*/
 
 /*
 @@ LUAI_MAXSTACK limits the size of the Lua stack.
@@ -708,46 +359,181 @@
 #define LUAI_MAXSTACK		15000
 #endif
 
-
-/*
-@@ LUA_EXTRASPACE defines the size of a raw memory area associated with
-** a Lua state with very fast access.
-** CHANGE it if you need a different size.
-*/
-#define LUA_EXTRASPACE		(sizeof(void *))
+/* reserve some space for error handling */
+#define LUAI_FIRSTPSEUDOIDX	(-LUAI_MAXSTACK - 1000)
 
 
-/*
-@@ LUA_IDSIZE gives the maximum size for the description of the source
-@@ of a function in debug information.
-** CHANGE it if you want a different size.
-*/
-#define LUA_IDSIZE	60
 
 
 /*
 @@ 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 ~5030 bytes, so a
-** smaller buffer would force a memory allocation for each call to
-** 'string.format'.)
+** CHANGE it if it uses too much C-stack space.
 */
-#if defined(LUA_FLOAT_LONGDOUBLE)
-#define LUAL_BUFFERSIZE		8192
-#else
-#define LUAL_BUFFERSIZE   ((int)(0x80 * sizeof(void*) * sizeof(lua_Integer)))
-#endif
+#define LUAL_BUFFERSIZE		BUFSIZ
+
 
-/* }================================================================== */
 
 
 /*
-@@ LUA_QL describes how error messages quote program elements.
-** Lua does not use these macros anymore; they are here for
-** compatibility only.
+** {==================================================================
+@@ LUA_NUMBER is the type of numbers in Lua.
+** CHANGE the following definitions only if you want to build Lua
+** with a number type different from double. You may also need to
+** change lua_number2int & lua_number2integer.
+** ===================================================================
 */
-#define LUA_QL(x)	"'" x "'"
-#define LUA_QS		LUA_QL("%s")
+
+#define LUA_NUMBER_DOUBLE
+#define LUA_NUMBER	double
+
+/*
+@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
+@* over a number.
+*/
+#define LUAI_UACNUMBER	double
+
+
+/*
+@@ LUA_NUMBER_SCAN is the format for reading numbers.
+@@ LUA_NUMBER_FMT is the format for writing numbers.
+@@ lua_number2str converts a number to a string.
+@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
+*/
+#define LUA_NUMBER_SCAN		"%lf"
+#define LUA_NUMBER_FMT		"%.14g"
+#define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
+#define LUAI_MAXNUMBER2STR	32 /* 16 digits, sign, point, and \0 */
+
+
+/*
+@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
+*/
+#define l_mathop(x)		(x)
+
+
+/*
+@@ lua_str2number converts a decimal numeric string to a number.
+@@ lua_strx2number converts an hexadecimal numeric string to a number.
+** In C99, 'strtod' does both conversions. C89, however, has no function
+** to convert floating hexadecimal strings to numbers. For these
+** systems, you can leave 'lua_strx2number' undefined and Lua will
+** provide its own implementation.
+*/
+#define lua_str2number(s,p)	strtod((s), (p))
+
+#if defined(LUA_USE_STRTODHEX)
+#define lua_strx2number(s,p)	strtod((s), (p))
+#endif
+
+
+/*
+@@ The luai_num* macros define the primitive operations over numbers.
+*/
+
+/* the following operations need the math library */
+#if defined(lobject_c) || defined(lvm_c)
+#include <math.h>
+#define luai_nummod(L,a,b)	((a) - l_mathop(floor)((a)/(b))*(b))
+#define luai_numpow(L,a,b)	(l_mathop(pow)(a,b))
+#endif
+
+/* these are quite standard operations */
+#if defined(LUA_CORE)
+#define luai_numadd(L,a,b)	((a)+(b))
+#define luai_numsub(L,a,b)	((a)-(b))
+#define luai_nummul(L,a,b)	((a)*(b))
+#define luai_numdiv(L,a,b)	((a)/(b))
+#define luai_numunm(L,a)	(-(a))
+#define luai_numeq(a,b)		((a)==(b))
+#define luai_numlt(L,a,b)	((a)<(b))
+#define luai_numle(L,a,b)	((a)<=(b))
+#define luai_numisnan(L,a)	(!luai_numeq((a), (a)))
+#endif
+
+
+
+/*
+@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
+** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
+** machines, ptrdiff_t gives a good choice between int or long.)
+*/
+#define LUA_INTEGER	ptrdiff_t
+
+/*
+@@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
+** It must have at least 32 bits.
+*/
+#define LUA_UNSIGNED	unsigned LUA_INT32
+
+
+
+/*
+** Some tricks with doubles
+*/
+
+#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI)	/* { */
+/*
+** The next definitions activate some tricks to speed up the
+** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
+**
+@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
+** DirectX idiosyncrasy.
+**
+@@ LUA_IEEE754TRICK uses a trick that should work on any machine
+** using IEEE754 with a 32-bit integer type.
+**
+@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
+** defined when LUA_INTEGER is a 32-bit integer.
+**
+@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
+** (0 for little endian, 1 for big endian); if not defined, Lua will
+** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
+**
+@@ LUA_NANTRICK controls the use of a trick to pack all types into
+** a single double value, using NaN values to represent non-number
+** values. The trick only works on 32-bit machines (ints and pointers
+** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
+** with conventional endianess (12345678 or 87654321), in CPUs that do
+** not produce signaling NaN values (all NaNs are quiet).
+*/
+
+/* Microsoft compiler on a Pentium (32 bit) ? */
+#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86)	/* { */
+
+#define LUA_MSASMTRICK
+#define LUA_IEEEENDIAN		0
+#define LUA_NANTRICK
+
+
+/* pentium 32 bits? */
+#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
+
+#define LUA_IEEE754TRICK
+#define LUA_IEEELL
+#define LUA_IEEEENDIAN		0
+#define LUA_NANTRICK
+
+/* pentium 64 bits? */
+#elif defined(__x86_64)						/* }{ */
+
+#define LUA_IEEE754TRICK
+#define LUA_IEEEENDIAN		0
+
+#elif defined(__POWERPC__) || defined(__ppc__)			/* }{ */
+
+#define LUA_IEEE754TRICK
+#define LUA_IEEEENDIAN		1
+
+#else								/* }{ */
+
+/* assume IEEE754 and a 32-bit integer type */
+#define LUA_IEEE754TRICK
+
+#endif								/* } */
+
+#endif							/* } */
+
+/* }================================================================== */
 
 
 
@@ -761,7 +547,5 @@
 
 
 
-
-
 #endif
 

lualib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h,v 1.43 2011/12/08 12:11:37 roberto Exp roberto $
+** $Id: lualib.h,v 1.43 2011/12/08 12:11:37 roberto Exp $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -29,9 +29,6 @@ LUAMOD_API int (luaopen_os) (lua_State *L);
 #define LUA_STRLIBNAME	"string"
 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);
 

lundump.c

@@ -1,17 +1,14 @@
 /*
-** $Id: lundump.c,v 2.43 2015/09/17 15:51:05 roberto Exp roberto $
+** $Id: lundump.c,v 2.22 2012/05/08 13:53:33 roberto Exp $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
 
+#include <string.h>
+
 #define lundump_c
 #define LUA_CORE
 
-#include "lprefix.h"
-
-
-#include <string.h>
-
 #include "lua.h"
 
 #include "ldebug.h"
@@ -23,257 +20,239 @@
 #include "lundump.h"
 #include "lzio.h"
 
-
-#if !defined(luai_verifycode)
-#define luai_verifycode(L,b,f)  /* empty */
-#endif
-
-
 typedef struct {
-  lua_State *L;
-  ZIO *Z;
-  const char *name;
+ lua_State* L;
+ ZIO* Z;
+ Mbuffer* b;
+ const char* name;
 } LoadState;
 
-
-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);
+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);
 }
 
+#define LoadMem(S,b,n,size)	LoadBlock(S,b,(n)*(size))
+#define LoadByte(S)		(lu_byte)LoadChar(S)
+#define LoadVar(S,x)		LoadMem(S,&x,1,sizeof(x))
+#define LoadVector(S,b,n,size)	LoadMem(S,b,n,size)
 
-/*
-** 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]))
+#if !defined(luai_verifycode)
+#define luai_verifycode(L,b,f)	/* empty */
+#endif
 
-static void LoadBlock (LoadState *S, void *b, size_t size) {
-  if (luaZ_read(S->Z, b, size) != 0)
-    error(S, "truncated");
+static void LoadBlock(LoadState* S, void* b, size_t size)
+{
+ if (luaZ_read(S->Z,b,size)!=0) error(S,"truncated");
 }
 
-
-#define LoadVar(S,x)		LoadVector(S,&x,1)
-
-
-static lu_byte LoadByte (LoadState *S) {
-  lu_byte x;
-  LoadVar(S, x);
-  return x;
+static int LoadChar(LoadState* S)
+{
+ char x;
+ LoadVar(S,x);
+ return x;
 }
 
-
-static int LoadInt (LoadState *S) {
-  int x;
-  LoadVar(S, x);
-  return x;
+static int LoadInt(LoadState* S)
+{
+ int x;
+ LoadVar(S,x);
+ if (x<0) error(S,"corrupted");
+ return x;
 }
 
-
-static lua_Number LoadNumber (LoadState *S) {
-  lua_Number x;
-  LoadVar(S, x);
-  return x;
+static lua_Number LoadNumber(LoadState* S)
+{
+ lua_Number x;
+ LoadVar(S,x);
+ return x;
 }
 
-
-static lua_Integer LoadInteger (LoadState *S) {
-  lua_Integer x;
-  LoadVar(S, x);
-  return x;
+static TString* LoadString(LoadState* S)
+{
+ size_t size;
+ LoadVar(S,size);
+ if (size==0)
+  return NULL;
+ else
+ {
+  char* s=luaZ_openspace(S->L,S->b,size);
+  LoadBlock(S,s,size*sizeof(char));
+  return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */
+ }
 }
 
+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,sizeof(Instruction));
+}
 
-static TString *LoadString (LoadState *S) {
-  size_t size = LoadByte(S);
-  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);
-    return luaS_newlstr(S->L, buff, size);
-  }
-  else {  /* long string */
-    TString *ts = luaS_createlngstrobj(S->L, size);
-    LoadVector(S, getstr(ts), size);  /* load directly in final place */
-    return ts;
+static void LoadFunction(LoadState* S, Proto* f);
+
+static void LoadConstants(LoadState* S, Proto* f)
+{
+ int i,n;
+ 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=LoadChar(S);
+  switch (t)
+  {
+   case LUA_TNIL:
+	setnilvalue(o);
+	break;
+   case LUA_TBOOLEAN:
+	setbvalue(o,LoadChar(S));
+	break;
+   case LUA_TNUMBER:
+	setnvalue(o,LoadNumber(S));
+	break;
+   case LUA_TSTRING:
+	setsvalue2n(S->L,o,LoadString(S));
+	break;
+    default: lua_assert(0);
   }
+ }
+ 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);
+  LoadFunction(S,f->p[i]);
+ }
 }
 
-
-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);
+static void LoadUpvalues(LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ f->upvalues=luaM_newvector(S->L,n,Upvaldesc);
+ f->sizeupvalues=n;
+ for (i=0; i<n; i++) f->upvalues[i].name=NULL;
+ for (i=0; i<n; i++)
+ {
+  f->upvalues[i].instack=LoadByte(S);
+  f->upvalues[i].idx=LoadByte(S);
+ }
 }
 
-
-static void LoadFunction(LoadState *S, Proto *f, TString *psource);
-
-
-static void LoadConstants (LoadState *S, Proto *f) {
-  int i;
-  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);
-    switch (t) {
-    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));
-      break;
-    default:
-      lua_assert(0);
-    }
-  }
+static void LoadDebug(LoadState* S, Proto* f)
+{
+ int i,n;
+ f->source=LoadString(S);
+ n=LoadInt(S);
+ f->lineinfo=luaM_newvector(S->L,n,int);
+ f->sizelineinfo=n;
+ LoadVector(S,f->lineinfo,n,sizeof(int));
+ 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=LoadString(S);
+  f->locvars[i].startpc=LoadInt(S);
+  f->locvars[i].endpc=LoadInt(S);
+ }
+ n=LoadInt(S);
+ for (i=0; i<n; i++) f->upvalues[i].name=LoadString(S);
 }
 
-
-static void LoadProtos (LoadState *S, Proto *f) {
-  int i;
-  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);
-    LoadFunction(S, f->p[i], f->source);
-  }
+static void LoadFunction(LoadState* S, Proto* 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);
+ LoadDebug(S,f);
 }
 
+/* the code below must be consistent with the code in luaU_header */
+#define N0	LUAC_HEADERSIZE
+#define N1	(sizeof(LUA_SIGNATURE)-sizeof(char))
+#define N2	N1+2
+#define N3	N2+6
 
-static void LoadUpvalues (LoadState *S, Proto *f) {
-  int i, n;
-  n = LoadInt(S);
-  f->upvalues = luaM_newvector(S->L, n, Upvaldesc);
-  f->sizeupvalues = n;
-  for (i = 0; i < n; i++)
-    f->upvalues[i].name = NULL;
-  for (i = 0; i < n; i++) {
-    f->upvalues[i].instack = LoadByte(S);
-    f->upvalues[i].idx = LoadByte(S);
-  }
+static void LoadHeader(LoadState* S)
+{
+ lu_byte h[LUAC_HEADERSIZE];
+ lu_byte s[LUAC_HEADERSIZE];
+ luaU_header(h);
+ memcpy(s,h,sizeof(char));			/* first char already read */
+ LoadBlock(S,s+sizeof(char),LUAC_HEADERSIZE-sizeof(char));
+ if (memcmp(h,s,N0)==0) return;
+ if (memcmp(h,s,N1)!=0) error(S,"not a");
+ if (memcmp(h,s,N2)!=0) error(S,"version mismatch in");
+ if (memcmp(h,s,N3)!=0) error(S,"incompatible"); else error(S,"corrupted");
 }
 
-
-static void LoadDebug (LoadState *S, Proto *f) {
-  int i, n;
-  n = LoadInt(S);
-  f->lineinfo = luaM_newvector(S->L, n, int);
-  f->sizelineinfo = n;
-  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 = LoadString(S);
-    f->locvars[i].startpc = LoadInt(S);
-    f->locvars[i].endpc = LoadInt(S);
-  }
-  n = LoadInt(S);
-  for (i = 0; i < n; i++)
-    f->upvalues[i].name = LoadString(S);
-}
-
-
-static void LoadFunction (LoadState *S, Proto *f, TString *psource) {
-  f->source = LoadString(S);
-  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);
-}
-
-
-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);
-  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 in", tname));
-}
-
-
-#define checksize(S,t)	fchecksize(S,sizeof(t),#t)
-
-static void checkHeader (LoadState *S) {
-  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, "endianness mismatch in");
-  if (LoadNumber(S) != LUAC_NUM)
-    error(S, "float format mismatch in");
-}
-
-
 /*
 ** load precompiled chunk
 */
-LClosure *luaU_undump(lua_State *L, ZIO *Z, const char *name) {
-  LoadState S;
-  LClosure *cl;
-  if (*name == '@' || *name == '=')
-    S.name = name + 1;
-  else if (*name == LUA_SIGNATURE[0])
-    S.name = "binary string";
-  else
-    S.name = name;
-  S.L = L;
-  S.Z = Z;
-  checkHeader(&S);
-  cl = luaF_newLclosure(L, LoadByte(&S));
-  setclLvalue(L, L->top, cl);
-  luaD_inctop(L);
-  cl->p = luaF_newproto(L);
-  LoadFunction(&S, cl->p, NULL);
-  lua_assert(cl->nupvalues == cl->p->sizeupvalues);
-  luai_verifycode(L, buff, cl->p);
-  return cl;
+Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
+{
+ LoadState S;
+ Closure* cl;
+ if (*name=='@' || *name=='=')
+  S.name=name+1;
+ else if (*name==LUA_SIGNATURE[0])
+  S.name="binary string";
+ else
+  S.name=name;
+ S.L=L;
+ S.Z=Z;
+ S.b=buff;
+ LoadHeader(&S);
+ cl=luaF_newLclosure(L,1);
+ setclLvalue(L,L->top,cl); incr_top(L);
+ cl->l.p=luaF_newproto(L);
+ LoadFunction(&S,cl->l.p);
+ if (cl->l.p->sizeupvalues != 1)
+ {
+  Proto* p=cl->l.p;
+  cl=luaF_newLclosure(L,cl->l.p->sizeupvalues);
+  cl->l.p=p;
+  setclLvalue(L,L->top-1,cl);
+ }
+ luai_verifycode(L,buff,cl->l.p);
+ return cl;
 }
 
+#define MYINT(s)	(s[0]-'0')
+#define VERSION		MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR)
+#define FORMAT		0		/* this is the official format */
+
+/*
+* make header for precompiled chunks
+* if you change the code below be sure to update LoadHeader and FORMAT above
+* and LUAC_HEADERSIZE in lundump.h
+*/
+void luaU_header (lu_byte* h)
+{
+ int x=1;
+ memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-sizeof(char));
+ h+=sizeof(LUA_SIGNATURE)-sizeof(char);
+ *h++=cast_byte(VERSION);
+ *h++=cast_byte(FORMAT);
+ *h++=cast_byte(*(char*)&x);			/* endianness */
+ *h++=cast_byte(sizeof(int));
+ *h++=cast_byte(sizeof(size_t));
+ *h++=cast_byte(sizeof(Instruction));
+ *h++=cast_byte(sizeof(lua_Number));
+ *h++=cast_byte(((lua_Number)0.5)==0);		/* is lua_Number integral? */
+ memcpy(h,LUAC_TAIL,sizeof(LUAC_TAIL)-sizeof(char));
+}

lundump.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.44 2014/06/19 18:27:20 roberto Exp roberto $
+** $Id: lundump.h,v 1.39 2012/05/08 13:53:33 roberto Exp $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -7,26 +7,22 @@
 #ifndef lundump_h
 #define lundump_h
 
-#include "llimits.h"
 #include "lobject.h"
 #include "lzio.h"
 
-
-/* data to catch conversion errors */
-#define LUAC_DATA	"\x19\x93\r\n\x1a\n"
-
-#define LUAC_INT	0x5678
-#define LUAC_NUM	cast_num(370.5)
-
-#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 */
-LUAI_FUNC LClosure* luaU_undump (lua_State* L, ZIO* Z, const char* name);
+LUAI_FUNC Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
+
+/* make header; from lundump.c */
+LUAI_FUNC void luaU_header (lu_byte* h);
 
 /* dump one chunk; from ldump.c */
-LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w,
-                         void* data, int strip);
+LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip);
+
+/* data to catch conversion errors */
+#define LUAC_TAIL		"\x19\x93\r\n\x1a\n"
+
+/* size in bytes of header of binary files */
+#define LUAC_HEADERSIZE		(sizeof(LUA_SIGNATURE)-sizeof(char)+2+6+sizeof(LUAC_TAIL)-sizeof(char))
 
 #endif

lutf8lib.c

@@ -1,256 +0,0 @@
-/*
-** $Id: lutf8lib.c,v 1.14 2015/03/05 16:07:46 roberto Exp roberto $
-** Standard library for UTF-8 manipulation
-** See Copyright Notice in lua.h
-*/
-
-#define lutf8lib_c
-#define LUA_LIB
-
-#include "lprefix.h"
-
-
-#include <assert.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-
-#include "lauxlib.h"
-#include "lualib.h"
-
-#define MAXUNICODE	0x10FFFF
-
-#define iscont(p)	((*(p) & 0xC0) == 0x80)
-
-
-/* from strlib */
-/* translate a relative string position: negative means back from end */
-static lua_Integer u_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;
-}
-
-
-/*
-** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
-*/
-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 */
-    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 |= ((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 (val) *val = res;
-  return (const char *)s + 1;  /* +1 to include first byte */
-}
-
-
-/*
-** 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) {
-  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);
-  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
-                   "initial position out of string");
-  luaL_argcheck(L, --posj < (lua_Integer)len, 3,
-                   "final position out of string");
-  while (posi <= posj) {
-    const char *s1 = utf8_decode(s + posi, NULL);
-    if (s1 == NULL) {  /* conversion error? */
-      lua_pushnil(L);  /* return nil ... */
-      lua_pushinteger(L, posi + 1);  /* ... and current position */
-      return 2;
-    }
-    posi = s1 - s;
-    n++;
-  }
-  lua_pushinteger(L, n);
-  return 1;
-}
-
-
-/*
-** 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 n;
-  const char *se;
-  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;
-  luaL_checkstack(L, n, "string slice too long");
-  n = 0;
-  se = s + pose;
-  for (s += posi - 1; s < se;) {
-    int code;
-    s = utf8_decode(s, &code);
-    if (s == NULL)
-      return luaL_error(L, "invalid UTF-8 code");
-    lua_pushinteger(L, code);
-    n++;
-  }
-  return n;
-}
-
-
-static void pushutfchar (lua_State *L, int arg) {
-  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);
-}
-
-
-/*
-** utfchar(n1, n2, ...)  -> char(n1)..char(n2)...
-*/
-static int utfchar (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  if (n == 1)  /* optimize common case of single char */
-    pushutfchar(L, 1);
-  else {
-    int i;
-    luaL_Buffer b;
-    luaL_buffinit(L, &b);
-    for (i = 1; i <= n; i++) {
-      pushutfchar(L, i);
-      luaL_addvalue(&b);
-    }
-    luaL_pushresult(&b);
-  }
-  return 1;
-}
-
-
-/*
-** offset(s, n, [i])  -> index where n-th character counting from
-**   position 'i' starts; 0 means character at 'i'.
-*/
-static int byteoffset (lua_State *L) {
-  size_t len;
-  const char *s = luaL_checklstring(L, 1, &len);
-  lua_Integer n  = luaL_checkinteger(L, 2);
-  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 range");
-  if (n == 0) {
-    /* find beginning of current byte sequence */
-    while (posi > 0 && iscont(s + posi)) posi--;
-  }
-  else {
-    if (iscont(s + posi))
-      luaL_error(L, "initial position is a continuation byte");
-    if (n < 0) {
-       while (n < 0 && posi > 0) {  /* move back */
-         do {  /* find beginning of previous character */
-           posi--;
-         } while (posi > 0 && iscont(s + posi));
-         n++;
-       }
-     }
-     else {
-       n--;  /* do not move for 1st character */
-       while (n > 0 && posi < (lua_Integer)len) {
-         do {  /* find beginning of next character */
-           posi++;
-         } while (iscont(s + posi));  /* (cannot pass final '\0') */
-         n--;
-       }
-     }
-  }
-  if (n == 0)  /* did it find given character? */
-    lua_pushinteger(L, posi + 1);
-  else  /* no such character */
-    lua_pushnil(L);
-  return 1;  
-}
-
-
-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;
-  if (n < 0)  /* first iteration? */
-    n = 0;  /* start from here */
-  else if (n < (lua_Integer)len) {
-    n++;  /* skip current byte */
-    while (iscont(s + n)) n++;  /* and its continuations */
-  }
-  if (n >= (lua_Integer)len)
-    return 0;  /* no more codepoints */
-  else {
-    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);
-    return 2;
-  }
-}
-
-
-static int iter_codes (lua_State *L) {
-  luaL_checkstring(L, 1);
-  lua_pushcfunction(L, iter_aux);
-  lua_pushvalue(L, 1);
-  lua_pushinteger(L, 0);
-  return 3;
-}
-
-
-/* pattern to match a single UTF-8 character */
-#define UTF8PATT	"[\0-\x7F\xC2-\xF4][\x80-\xBF]*"
-
-
-static const luaL_Reg funcs[] = {
-  {"offset", byteoffset},
-  {"codepoint", codepoint},
-  {"char", utfchar},
-  {"len", utflen},
-  {"codes", iter_codes},
-  /* placeholders */
-  {"charpattern", NULL},
-  {NULL, NULL}
-};
-
-
-LUAMOD_API int luaopen_utf8 (lua_State *L) {
-  luaL_newlib(L, funcs);
-  lua_pushlstring(L, UTF8PATT, sizeof(UTF8PATT)/sizeof(char) - 1);
-  lua_setfield(L, -2, "charpattern");
-  return 1;
-}
-

lvm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 2.38 2015/08/03 20:40:26 roberto Exp roberto $
+** $Id: lvm.h,v 2.18 2013/01/08 14:06:55 roberto Exp $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -13,102 +13,32 @@
 #include "ltm.h"
 
 
-#if !defined(LUA_NOCVTN2S)
-#define cvt2str(o)	ttisnumber(o)
-#else
-#define cvt2str(o)	0	/* no conversion from numbers to strings */
-#endif
+#define tostring(L,o) (ttisstring(o) || (luaV_tostring(L, o)))
+
+#define tonumber(o,n)	(ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL))
+
+#define equalobj(L,o1,o2)  (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2))
+
+#define luaV_rawequalobj(o1,o2)		equalobj(NULL,o1,o2)
 
 
-#if !defined(LUA_NOCVTS2N)
-#define cvt2num(o)	ttisstring(o)
-#else
-#define cvt2num(o)	0	/* no conversion from strings to numbers */
-#endif
+/* not to called directly */
+LUAI_FUNC int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2);
 
 
-/*
-** You can define LUA_FLOORN2I if you want to convert floats to integers
-** by flooring them (instead of raising an error if they are not
-** integral values)
-*/
-#if !defined(LUA_FLOORN2I)
-#define LUA_FLOORN2I		0
-#endif
-
-
-#define tonumber(o,n) \
-	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
-
-#define tointeger(o,i) \
-    (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))
-
-#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,t2)
-
-
-/*
-** fast track for 'gettable': 1 means 'aux' points to resulted value;
-** 0 means 'aux' is metamethod (if 't' is a table) or NULL. 'f' is
-** the raw get function to use.
-*/
-#define luaV_fastget(L,t,k,aux,f) \
-  (!ttistable(t)  \
-   ? (aux = NULL, 0)  /* not a table; 'aux' is NULL and result is 0 */  \
-   : (aux = f(hvalue(t), k),  /* else, do raw access */  \
-      !ttisnil(aux) ? 1  /* result not nil? 'aux' has it */  \
-      : (aux = fasttm(L, hvalue(t)->metatable, TM_INDEX),  /* get metamethod */\
-         aux != NULL  ? 0  /* has metamethod? must call it */  \
-         : (aux = luaO_nilobject, 1))))  /* else, final result is nil */
-
-/*
-** standard implementation for 'gettable'
-*/
-#define luaV_gettable(L,t,k,v) { const TValue *aux; \
-  if (luaV_fastget(L,t,k,aux,luaH_get)) { setobj2s(L, v, aux); } \
-  else luaV_finishget(L,t,k,v,aux); }
-
-
-/*
-** 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_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)))
-
-
-#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); }
-  
-
-
-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, int mode);
-LUAI_FUNC void luaV_finishget (lua_State *L, const TValue *t, TValue *key,
-                               StkId val, const TValue *tm);
-LUAI_FUNC void luaV_finishset (lua_State *L, const TValue *t, TValue *key,
-                               StkId val, const TValue *oldval);
+LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n);
+LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj);
+LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key,
+                                            StkId val);
+LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
+                                            StkId val);
 LUAI_FUNC void luaV_finishOp (lua_State *L);
 LUAI_FUNC void luaV_execute (lua_State *L);
 LUAI_FUNC void luaV_concat (lua_State *L, int total);
-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_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
+LUAI_FUNC void luaV_arith (lua_State *L, StkId ra, const TValue *rb,
+                           const TValue *rc, TMS op);
 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
 
 #endif

lzio.c

@@ -1,17 +1,15 @@
 /*
-** $Id: lzio.c,v 1.36 2014/11/02 19:19:04 roberto Exp roberto $
+** $Id: lzio.c,v 1.35 2012/05/14 13:34:18 roberto Exp $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
 
-#define lzio_c
-#define LUA_CORE
-
-#include "lprefix.h"
-
 
 #include <string.h>
 
+#define lzio_c
+#define LUA_CORE
+
 #include "lua.h"
 
 #include "llimits.h"
@@ -66,3 +64,13 @@ size_t luaZ_read (ZIO *z, void *b, size_t n) {
   return 0;
 }
 
+/* ------------------------------------------------------------------------ */
+char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
+  if (n > buff->buffsize) {
+    if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
+    luaZ_resizebuffer(L, buff, n);
+  }
+  return buff->buffer;
+}
+
+

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.30 2014/12/19 17:26:14 roberto Exp roberto $
+** $Id: lzio.h,v 1.26 2011/07/15 12:48:03 roberto Exp $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -32,21 +32,20 @@ typedef struct Mbuffer {
 #define luaZ_sizebuffer(buff)	((buff)->buffsize)
 #define luaZ_bufflen(buff)	((buff)->n)
 
-#define luaZ_buffremove(buff,i)	((buff)->n -= (i))
 #define luaZ_resetbuffer(buff) ((buff)->n = 0)
 
 
 #define luaZ_resizebuffer(L, buff, size) \
-	((buff)->buffer = luaM_reallocvchar(L, (buff)->buffer, \
-				(buff)->buffsize, size), \
+	(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
 	(buff)->buffsize = size)
 
 #define luaZ_freebuffer(L, buff)	luaZ_resizebuffer(L, buff, 0)
 
 
+LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
 LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
                                         void *data);
-LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n);	/* read next n bytes */
+LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n);	/* read next n bytes */
 
 
 
@@ -56,7 +55,7 @@ struct Zio {
   size_t n;			/* bytes still unread */
   const char *p;		/* current position in buffer */
   lua_Reader reader;		/* reader function */
-  void *data;			/* additional data */
+  void* data;			/* additional data */
   lua_State *L;			/* Lua state (for reader) */
 };
 

makefile

@@ -4,63 +4,35 @@
 
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
-# Warnings valid for both C and C++
-CWARNSCPP= \
-	-pedantic \
-	-Wextra \
-	-Wshadow \
-	-Wsign-compare \
-	-Wundef \
-	-Wwrite-strings \
-	-Wredundant-decls \
-	-Wdisabled-optimization \
-	# the next warnings generate to much noise, so they are disabled
-	# -Wdouble-promotion \
-	# -Wconversion  -Wno-sign-conversion \
-	# -Wsign-conversion \
-	# -Wconversion \
-	# -Wlogical-op \
-	# -Wstrict-overflow=2 \
-	# -Wformat=2 \
-	# -Wcast-qual \
+CWARNS= -pedantic -Waggregate-return -Wcast-align \
+        -Wmissing-prototypes -Wpointer-arith -Wshadow \
+        -Wsign-compare -Wstrict-prototypes -Wundef -Wwrite-strings
+# -Wcast-qual
 
-# The next warnings are neither valid nor needed for C++
-CWARNSC= -Wdeclaration-after-statement \
-	-Wmissing-prototypes \
-	-Wnested-externs \
-	-Wstrict-prototypes \
-	-Wc++-compat \
-	-Wold-style-definition \
-
-
-CWARNS= $(CWARNSCPP) $(CWARNSC)
-
-
-# -DEXTERNMEMCHECK -DHARDSTACKTESTS -DHARDMEMTESTS -DTRACEMEM='"tempmem"'
+# -DEXTERNMEMCHECK -DHARDSTACKTESTS
 # -g -DLUA_USER_H='"ltests.h"'
-# -pg -malign-double
-# -DLUA_USE_CTYPE -DLUA_USE_APICHECK
-# (in clang, '-ftrapv' for runtime checks of integer overflows)
-# -fsanitize=undefined -ftrapv
-# TESTS= -DLUA_USER_H='"ltests.h"'
+# -fomit-frame-pointer #-pg -malign-double
+TESTS= -g -DLUA_USER_H='"ltests.h"'
 
-# -mtune=native -fomit-frame-pointer
-LOCAL = $(TESTS) $(CWARNS) -g
+LOCAL = $(TESTS) $(CWARNS)
 
 
-
-# enable Linux goodies
-MYCFLAGS= $(LOCAL) -std=c99 -DLUA_USE_LINUX -DLUA_COMPAT_5_2
-MYLDFLAGS= $(LOCAL) -Wl,-E
-MYLIBS= -ldl -lreadline -lhistory -lncurses
-
-
-CC= clang-3.6
-CFLAGS= -Wall -O2 $(MYCFLAGS)
+CC= gcc
+CFLAGS= -Wall $(MYCFLAGS) -O2
 AR= ar rcu
 RANLIB= ranlib
 RM= rm -f
 
+MYCFLAGS= $(LOCAL)
+MYLDFLAGS=
+MYLIBS=
+
+
+# enable Linux goodies
+MYCFLAGS= $(LOCAL) -DLUA_USE_LINUX
+MYLDFLAGS= -Wl,-E
+MYLIBS= -ldl -lreadline -lhistory -lncurses
+
 
 
 # == END OF USER SETTINGS. NO NEED TO CHANGE ANYTHING BELOW THIS LINE =========
@@ -69,18 +41,18 @@ RM= rm -f
 LIBS = -lm
 
 CORE_T=	liblua.a
-CORE_O=	lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o \
-	lmem.o lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o \
-	ltm.o lundump.o lvm.o lzio.o ltests.o
+CORE_O=	lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \
+	lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.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 lbitlib.o loadlib.o lcorolib.o linit.o
+	loadlib.o linit.o
 
 LUA_T=	lua
 LUA_O=	lua.o
 
-# LUAC_T=	luac
-# LUAC_O=	luac.o print.o
+LUAC_T=	luac
+LUAC_O=	luac.o print.o
 
 ALL_T= $(CORE_T) $(LUA_T) $(LUAC_T)
 ALL_O= $(CORE_O) $(LUA_O) $(LUAC_O) $(AUX_O) $(LIB_O)
@@ -120,76 +92,64 @@ echo:
 	@echo "MYLIBS = $(MYLIBS)"
 	@echo "DL = $(DL)"
 
-$(ALL_O): makefile
+# DO NOT DELETE
 
-# DO NOT EDIT
-# automatically made with 'gcc -MM l*.c'
-
-lapi.o: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
- lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lstring.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
-lcorolib.o: lcorolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lctype.o: lctype.c lprefix.h lctype.h lua.h luaconf.h llimits.h
-ldblib.o: ldblib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-ldebug.o: ldebug.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
- lobject.h ltm.h lzio.h lmem.h lcode.h llex.h lopcodes.h lparser.h \
- ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h lvm.h
-ldo.o: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
- lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lopcodes.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 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
-liolib.o: liolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-llex.o: llex.c lprefix.h lua.h luaconf.h lctype.h llimits.h ldebug.h \
- lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lgc.h llex.h lparser.h \
- lstring.h ltable.h
-lmathlib.o: lmathlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lmem.o: lmem.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
-loadlib.o: loadlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lobject.o: lobject.c lprefix.h lua.h luaconf.h lctype.h llimits.h \
- ldebug.h lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h \
- lvm.h
-lopcodes.o: lopcodes.c lprefix.h lopcodes.h llimits.h lua.h luaconf.h
-loslib.o: loslib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-lparser.o: lparser.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 lfunc.h lstring.h lgc.h ltable.h
-lstate.o: lstate.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
- lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h llex.h \
- lstring.h ltable.h
-lstring.o: lstring.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
- lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h
-lstrlib.o: lstrlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
-ltable.o: ltable.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
-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 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 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 \
- lundump.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
-lzio.o: lzio.c lprefix.h lua.h luaconf.h llimits.h lmem.h lstate.h \
- lobject.h ltm.h lzio.h
+lapi.o: lapi.c lua.h luaconf.h lapi.h lobject.h llimits.h ldebug.h \
+  lstate.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h \
+  lundump.h lvm.h
+lauxlib.o: lauxlib.c lua.h luaconf.h lauxlib.h
+lbaselib.o: lbaselib.c lua.h luaconf.h lauxlib.h lualib.h
+lcode.o: lcode.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
+  lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h ltm.h \
+  ldo.h lgc.h
+ldblib.o: ldblib.c lua.h luaconf.h lauxlib.h lualib.h
+ldebug.o: ldebug.c lua.h luaconf.h lapi.h lobject.h llimits.h lcode.h \
+  llex.h lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h \
+  ltm.h ldo.h lfunc.h lstring.h lgc.h lvm.h
+ldo.o: ldo.c 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 lparser.h ltable.h \
+  lstring.h lundump.h lvm.h
+ldump.o: ldump.c lua.h luaconf.h lobject.h llimits.h lopcodes.h lstate.h \
+  ltm.h lzio.h lmem.h lundump.h
+lfunc.o: lfunc.c lua.h luaconf.h lfunc.h lobject.h llimits.h lgc.h lmem.h \
+  lstate.h ltm.h lzio.h
+lgc.o: lgc.c 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 lua.h luaconf.h lualib.h lauxlib.h
+liolib.o: liolib.c lua.h luaconf.h lauxlib.h lualib.h
+llex.o: llex.c lua.h luaconf.h ldo.h lobject.h llimits.h lstate.h ltm.h \
+  lzio.h lmem.h llex.h lparser.h ltable.h lstring.h lgc.h
+lmathlib.o: lmathlib.c lua.h luaconf.h lauxlib.h lualib.h
+lmem.o: lmem.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h
+loadlib.o: loadlib.c lua.h luaconf.h lauxlib.h lualib.h
+lobject.o: lobject.c lua.h luaconf.h ldo.h lobject.h llimits.h lstate.h \
+  ltm.h lzio.h lmem.h lstring.h lgc.h lvm.h
+lopcodes.o: lopcodes.c lua.h luaconf.h lobject.h llimits.h lopcodes.h
+loslib.o: loslib.c lua.h luaconf.h lauxlib.h lualib.h
+lparser.o: lparser.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
+  lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h ltm.h \
+  ldo.h lfunc.h lstring.h lgc.h
+lstate.o: lstate.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h llex.h lstring.h ltable.h
+lstring.o: lstring.c lua.h luaconf.h lmem.h llimits.h lobject.h lstate.h \
+  ltm.h lzio.h lstring.h lgc.h
+lstrlib.o: lstrlib.c lua.h luaconf.h lauxlib.h lualib.h
+ltable.o: ltable.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h lgc.h ltable.h
+ltablib.o: ltablib.c lua.h luaconf.h lauxlib.h lualib.h
+ltests.o: ltests.c lua.h luaconf.h lapi.h lobject.h llimits.h lauxlib.h \
+  lcode.h llex.h lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h \
+  lstate.h ltm.h ldo.h lfunc.h lstring.h lgc.h lualib.h
+ltm.o: ltm.c lua.h luaconf.h lobject.h llimits.h lstate.h ltm.h lzio.h \
+  lmem.h lstring.h lgc.h ltable.h
+lua.o: lua.c lua.h luaconf.h lauxlib.h lualib.h
+lundump.o: lundump.c lua.h luaconf.h ldebug.h lstate.h lobject.h \
+  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lopcodes.h lstring.h lgc.h \
+  lundump.h
+lvm.o: lvm.c 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
+lzio.o: lzio.c lua.h luaconf.h llimits.h lmem.h lstate.h lobject.h ltm.h \
+  lzio.h
 
 # (end of Makefile)