new way to handle -E option (write a mark in the registry to avoid

reading environment variables)

bugs

@@ -1880,8 +1880,8 @@ patch = [[
 +++ lundump.c   2008/04/04 19:51:41     2.7.1.4
 @@ -1,5 +1,5 @@
  /*
--** $Id: bugs,v 1.107 2010/04/19 18:04:58 roberto Exp roberto $
-+** $Id: bugs,v 1.107 2010/04/19 18:04:58 roberto Exp roberto $
+-** $Id: bugs,v 1.110 2011/08/17 20:38:51 roberto Exp roberto $
++** $Id: bugs,v 1.110 2011/08/17 20:38:51 roberto Exp roberto $
  ** load precompiled Lua chunks
  ** See Copyright Notice in lua.h
  */
@@ -2316,3 +2316,94 @@ patch = [[
 ]]
 }
 
+Bug{
+what = [[wrong code generation for some particular boolean expressions]],
+report = [[Thierry Van Elsuwe, 2011/01/20]],
+since = [[5.0]],
+example = [[
+print((('hi' or true) and true) or true)
+--> hi     (should be true)
+print(((nil and nil) or false) and true)
+--> nil    (should be false)
+]],
+patch = [[
+--- lcode.c	2009/06/15 14:12:25	2.25.1.4
++++ lcode.c	2011/01/31 14:44:25
+@@ -549,13 +549,6 @@
+       pc = e->u.s.info;
+       break;
+     }
+-    case VFALSE: {
+-      if (!hasjumps(e)) {
+-        pc = luaK_jump(fs);  /* always jump */
+-        break;
+-      }
+-      /* else go through */
+-    }
+     default: {
+       pc = jumponcond(fs, e, 0);
+       break;
+@@ -579,13 +572,6 @@
+       pc = e->u.s.info;
+       break;
+     }
+-    case VTRUE: {
+-      if (!hasjumps(e)) {
+-        pc = luaK_jump(fs);  /* always jump */
+-        break;
+-      }
+-      /* else go through */
+-    }
+     default: {
+       pc = jumponcond(fs, e, 1);
+       break;
+]]
+}
+
+Bug{
+what = [[__newindex metamethod may not work if metatable is its own
+metatable]],
+report = [[Cuero Bugot, 2011/08/09]],
+since = [[5.1]],
+example = [[
+meta={}
+setmetatable(meta, meta)
+meta.__newindex = function(t, key, value) print("set") end
+o = setmetatable({}, meta)
+o.x = 10    -- should print 'set'
+]],
+patch = [[
+--- lvm.c	2009/07/01 21:10:33	2.63.1.4
++++ lvm.c	2011/08/17 20:36:28
+@@ -142,6 +142,7 @@
+       if (!ttisnil(oldval) ||  /* result is no nil? */
+           (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
+         setobj2t(L, oldval, val);
++        h->flags = 0;
+         luaC_barriert(L, h, val);
+         return;
+       }
+]]
+}
+
+Bug{
+what = [[parser may collect a prototype while building it]],
+report = [[Ingo van Lil, 2011/10/13]],
+since = [[5.1.4 (caused by patch 5.1.4-6)]],
+example = nil,
+patch = [[
+--- lparser.c	2007/12/28 15:32:23	2.42.1.3
++++ lparser.c	2011/10/17 13:10:43
+@@ -374,9 +374,9 @@
+   lua_assert(luaG_checkcode(f));
+   lua_assert(fs->bl == NULL);
+   ls->fs = fs->prev;
+-  L->top -= 2;  /* remove table and prototype from the stack */
+   /* last token read was anchored in defunct function; must reanchor it */
+   if (fs) anchor_token(ls);
++  L->top -= 2;  /* remove table and prototype from the stack */
+ }
+ 
+ 
+]]
+}

lapi.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 2.139 2010/10/25 20:31:11 roberto Exp roberto $
+** $Id: lapi.c,v 2.158 2011/11/29 15:55:08 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -34,9 +34,13 @@ const char lua_ident[] =
   "$LuaAuthors: " LUA_AUTHORS " $";
 
 
+/* value at a non-valid index */
+#define NONVALIDVALUE		cast(TValue *, luaO_nilobject)
 
-#define api_checkvalidindex(L, i)	api_check(L, (i) != luaO_nilobject, \
-					  "invalid index")
+/* corresponding test */
+#define isvalid(o)	((o) != luaO_nilobject)
+
+#define api_checkvalidindex(L, i)  api_check(L, isvalid(i), "invalid index")
 
 
 static TValue *index2addr (lua_State *L, int idx) {
@@ -44,7 +48,7 @@ static TValue *index2addr (lua_State *L, int idx) {
   if (idx > 0) {
     TValue *o = ci->func + idx;
     api_check(L, idx <= ci->top - (ci->func + 1), "unacceptable index");
-    if (o >= L->top) return cast(TValue *, luaO_nilobject);
+    if (o >= L->top) return NONVALIDVALUE;
     else return o;
   }
   else if (idx > LUA_REGISTRYINDEX) {
@@ -57,12 +61,10 @@ static TValue *index2addr (lua_State *L, int idx) {
     idx = LUA_REGISTRYINDEX - idx;
     api_check(L, idx <= MAXUPVAL + 1, "upvalue index too large");
     if (ttislcf(ci->func))  /* light C function? */
-      return cast(TValue *, luaO_nilobject);  /* it has no upvalues */
+      return NONVALIDVALUE;  /* it has no upvalues */
     else {
-      Closure *func = clvalue(ci->func);
-      return (idx <= func->c.nupvalues)
-             ? &func->c.upvalue[idx-1]
-             : cast(TValue *, luaO_nilobject);
+      CClosure *func = clCvalue(ci->func);
+      return (idx <= func->nupvalues) ? &func->upvalue[idx-1] : NONVALIDVALUE;
     }
   }
 }
@@ -195,10 +197,8 @@ static void moveto (lua_State *L, TValue *fr, int idx) {
   TValue *to = index2addr(L, idx);
   api_checkvalidindex(L, to);
   setobj(L, to, fr);
-  if (idx < LUA_REGISTRYINDEX) {  /* function upvalue? */
-    lua_assert(ttisclosure(L->ci->func));
-    luaC_barrier(L, clvalue(L->ci->func), fr);
-  }
+  if (idx < LUA_REGISTRYINDEX)  /* function upvalue? */
+    luaC_barrier(L, clCvalue(L->ci->func), fr);
   /* LUA_REGISTRYINDEX does not need gc barrier
      (collector revisits it before finishing collection) */
 }
@@ -239,7 +239,7 @@ LUA_API void lua_pushvalue (lua_State *L, int idx) {
 
 LUA_API int lua_type (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
-  return (o == luaO_nilobject) ? LUA_TNONE : ttypenv(o);
+  return (isvalid(o) ? ttypenv(o) : LUA_TNONE);
 }
 
 
@@ -251,7 +251,7 @@ LUA_API const char *lua_typename (lua_State *L, int t) {
 
 LUA_API int lua_iscfunction (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
-  return (ttislcf(o) || (ttisclosure(o) && clvalue(o)->c.isC));
+  return (ttislcf(o) || (ttisCclosure(o)));
 }
 
 
@@ -277,21 +277,28 @@ LUA_API int lua_isuserdata (lua_State *L, int idx) {
 LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
   StkId o1 = index2addr(L, index1);
   StkId o2 = index2addr(L, index2);
-  return (o1 == luaO_nilobject || o2 == luaO_nilobject) ? 0
-         : luaO_rawequalObj(o1, o2);
+  return (isvalid(o1) && isvalid(o2)) ? luaV_rawequalobj(o1, o2) : 0;
 }
 
 
 LUA_API void  lua_arith (lua_State *L, int op) {
+  StkId o1;  /* 1st operand */
+  StkId o2;  /* 2nd operand */
   lua_lock(L);
-  api_checknelems(L, 2);
-  if (ttisnumber(L->top - 2) && ttisnumber(L->top - 1)) {
-    changenvalue(L->top - 2,
-                 luaO_arith(op, nvalue(L->top - 2), nvalue(L->top - 1)));
+  if (op != LUA_OPUNM) /* all other operations expect two operands */
+    api_checknelems(L, 2);
+  else {  /* for unary minus, add fake 2nd operand */
+    api_checknelems(L, 1);
+    setobjs2s(L, L->top, L->top - 1);
+    L->top++;
+  }
+  o1 = L->top - 2;
+  o2 = L->top - 1;
+  if (ttisnumber(o1) && ttisnumber(o2)) {
+    changenvalue(o1, luaO_arith(op, nvalue(o1), nvalue(o2)));
   }
   else
-    luaV_arith(L, L->top - 2, L->top - 2, L->top - 1,
-               cast(TMS, op - LUA_OPADD + TM_ADD));
+    luaV_arith(L, o1, o1, o2, cast(TMS, op - LUA_OPADD + TM_ADD));
   L->top--;
   lua_unlock(L);
 }
@@ -299,17 +306,17 @@ LUA_API void  lua_arith (lua_State *L, int op) {
 
 LUA_API int lua_compare (lua_State *L, int index1, int index2, int op) {
   StkId o1, o2;
-  int i;
+  int i = 0;
   lua_lock(L);  /* may call tag method */
   o1 = index2addr(L, index1);
   o2 = index2addr(L, index2);
-  if (o1 == luaO_nilobject || o2 == luaO_nilobject)
-    i = 0;
-  else switch (op) {
-    case LUA_OPEQ: i = equalobj(L, o1, o2); break;
-    case LUA_OPLT: i = luaV_lessthan(L, o1, o2); break;
-    case LUA_OPLE: i = luaV_lessequal(L, o1, o2); break;
-    default: api_check(L, 0, "invalid option"); i = 0;
+  if (isvalid(o1) && isvalid(o2)) {
+    switch (op) {
+      case LUA_OPEQ: i = equalobj(L, o1, o2); break;
+      case LUA_OPLT: i = luaV_lessthan(L, o1, o2); break;
+      case LUA_OPLE: i = luaV_lessequal(L, o1, o2); break;
+      default: api_check(L, 0, "invalid option");
+    }
   }
   lua_unlock(L);
   return i;
@@ -390,7 +397,7 @@ 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) {
   StkId o = index2addr(L, idx);
-  switch (ttype(o)) {
+  switch (ttypenv(o)) {
     case LUA_TSTRING: return tsvalue(o)->len;
     case LUA_TUSERDATA: return uvalue(o)->len;
     case LUA_TTABLE: return luaH_getn(hvalue(o));
@@ -402,15 +409,15 @@ LUA_API size_t lua_rawlen (lua_State *L, int idx) {
 LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
   if (ttislcf(o)) return fvalue(o);
-  else if (ttisclosure(o) && clvalue(o)->c.isC)
-    return clvalue(o)->c.f;
+  else if (ttisCclosure(o))
+    return clCvalue(o)->f;
   else return NULL;  /* not a C function */
 }
 
 
 LUA_API void *lua_touserdata (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
-  switch (ttype(o)) {
+  switch (ttypenv(o)) {
     case LUA_TUSERDATA: return (rawuvalue(o) + 1);
     case LUA_TLIGHTUSERDATA: return pvalue(o);
     default: return NULL;
@@ -428,7 +435,8 @@ LUA_API const void *lua_topointer (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
   switch (ttype(o)) {
     case LUA_TTABLE: return hvalue(o);
-    case LUA_TFUNCTION: return clvalue(o);
+    case LUA_TLCL: return clLvalue(o);
+    case LUA_TCCL: return clCvalue(o);
     case LUA_TLCF: return cast(void *, cast(size_t, fvalue(o)));
     case LUA_TTHREAD: return thvalue(o);
     case LUA_TUSERDATA:
@@ -456,6 +464,8 @@ LUA_API void lua_pushnil (lua_State *L) {
 LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
   lua_lock(L);
   setnvalue(L->top, n);
+  luai_checknum(L, L->top,
+    luaG_runerror(L, "C API - attempt to push a signaling NaN"));
   api_incr_top(L);
   lua_unlock(L);
 }
@@ -548,7 +558,7 @@ LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
     L->top -= n;
     while (n--)
       setobj2n(L, &cl->c.upvalue[n], L->top + n);
-    setclvalue(L, L->top, cl);
+    setclCvalue(L, L->top, cl);
   }
   api_incr_top(L);
   lua_unlock(L);
@@ -586,6 +596,17 @@ LUA_API int lua_pushthread (lua_State *L) {
 */
 
 
+LUA_API void lua_getglobal (lua_State *L, const char *var) {
+  Table *reg = hvalue(&G(L)->l_registry);
+  const TValue *gt;  /* global table */
+  lua_lock(L);
+  gt = luaH_getint(reg, LUA_RIDX_GLOBALS);
+  setsvalue2s(L, L->top++, luaS_new(L, var));
+  luaV_gettable(L, gt, L->top - 1, L->top - 1);
+  lua_unlock(L);
+}
+
+
 LUA_API void lua_gettable (lua_State *L, int idx) {
   StkId t;
   lua_lock(L);
@@ -619,11 +640,24 @@ LUA_API void lua_rawget (lua_State *L, int idx) {
 
 
 LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
-  StkId o;
+  StkId t;
   lua_lock(L);
-  o = index2addr(L, idx);
-  api_check(L, ttistable(o), "table expected");
-  setobj2s(L, L->top, luaH_getint(hvalue(o), n));
+  t = index2addr(L, idx);
+  api_check(L, ttistable(t), "table expected");
+  setobj2s(L, L->top, luaH_getint(hvalue(t), n));
+  api_incr_top(L);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawgetp (lua_State *L, int idx, const void *p) {
+  StkId t;
+  TValue k;
+  lua_lock(L);
+  t = index2addr(L, idx);
+  api_check(L, ttistable(t), "table expected");
+  setpvalue(&k, cast(void *, p));
+  setobj2s(L, L->top, luaH_get(hvalue(t), &k));
   api_incr_top(L);
   lua_unlock(L);
 }
@@ -648,7 +682,7 @@ LUA_API int lua_getmetatable (lua_State *L, int objindex) {
   int res;
   lua_lock(L);
   obj = index2addr(L, objindex);
-  switch (ttype(obj)) {
+  switch (ttypenv(obj)) {
     case LUA_TTABLE:
       mt = hvalue(obj)->metatable;
       break;
@@ -691,6 +725,19 @@ LUA_API void lua_getuservalue (lua_State *L, int idx) {
 */
 
 
+LUA_API void lua_setglobal (lua_State *L, const char *var) {
+  Table *reg = hvalue(&G(L)->l_registry);
+  const TValue *gt;  /* global table */
+  lua_lock(L);
+  api_checknelems(L, 1);
+  gt = luaH_getint(reg, LUA_RIDX_GLOBALS);
+  setsvalue2s(L, L->top++, luaS_new(L, var));
+  luaV_settable(L, gt, L->top - 1, L->top - 2);
+  L->top -= 2;  /* pop value and key */
+  lua_unlock(L);
+}
+
+
 LUA_API void lua_settable (lua_State *L, int idx) {
   StkId t;
   lua_lock(L);
@@ -723,6 +770,7 @@ LUA_API void lua_rawset (lua_State *L, int idx) {
   t = index2addr(L, idx);
   api_check(L, ttistable(t), "table expected");
   setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1);
+  invalidateTMcache(hvalue(t));
   luaC_barrierback(L, gcvalue(t), L->top-1);
   L->top -= 2;
   lua_unlock(L);
@@ -730,13 +778,28 @@ LUA_API void lua_rawset (lua_State *L, int idx) {
 
 
 LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
-  StkId o;
+  StkId t;
   lua_lock(L);
   api_checknelems(L, 1);
-  o = index2addr(L, idx);
-  api_check(L, ttistable(o), "table expected");
-  setobj2t(L, luaH_setint(L, hvalue(o), n), L->top-1);
-  luaC_barrierback(L, gcvalue(o), L->top-1);
+  t = index2addr(L, idx);
+  api_check(L, ttistable(t), "table expected");
+  luaH_setint(L, hvalue(t), n, L->top - 1);
+  luaC_barrierback(L, gcvalue(t), L->top-1);
+  L->top--;
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawsetp (lua_State *L, int idx, const void *p) {
+  StkId t;
+  TValue k;
+  lua_lock(L);
+  api_checknelems(L, 1);
+  t = index2addr(L, idx);
+  api_check(L, ttistable(t), "table expected");
+  setpvalue(&k, cast(void *, p));
+  setobj2t(L, luaH_set(L, hvalue(t), &k), L->top - 1);
+  luaC_barrierback(L, gcvalue(t), L->top - 1);
   L->top--;
   lua_unlock(L);
 }
@@ -755,18 +818,19 @@ LUA_API int lua_setmetatable (lua_State *L, int objindex) {
     api_check(L, ttistable(L->top - 1), "table expected");
     mt = hvalue(L->top - 1);
   }
-  switch (ttype(obj)) {
+  switch (ttypenv(obj)) {
     case LUA_TTABLE: {
       hvalue(obj)->metatable = mt;
       if (mt)
         luaC_objbarrierback(L, gcvalue(obj), mt);
+        luaC_checkfinalizer(L, gcvalue(obj), mt);
       break;
     }
     case LUA_TUSERDATA: {
       uvalue(obj)->metatable = mt;
       if (mt) {
         luaC_objbarrier(L, rawuvalue(obj), mt);
-        luaC_checkfinalizer(L, rawuvalue(obj));
+        luaC_checkfinalizer(L, gcvalue(obj), mt);
       }
       break;
     }
@@ -904,23 +968,22 @@ LUA_API int lua_pcallk (lua_State *L, int nargs, int nresults, int errfunc,
 
 
 LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data,
-                      const char *chunkname) {
+                      const char *chunkname, const char *mode) {
   ZIO z;
   int status;
   lua_lock(L);
   if (!chunkname) chunkname = "?";
   luaZ_init(L, &z, reader, data);
-  status = luaD_protectedparser(L, &z, chunkname);
+  status = luaD_protectedparser(L, &z, chunkname, mode);
   if (status == LUA_OK) {  /* no errors? */
-    Closure *f = clvalue(L->top - 1);  /* get newly created function */
-    lua_assert(!f->c.isC);
-    if (f->l.nupvalues == 1) {  /* does it have one upvalue? */
+    LClosure *f = clLvalue(L->top - 1);  /* get newly created function */
+    if (f->nupvalues == 1) {  /* does it have one upvalue? */
       /* get global table from registry */
       Table *reg = hvalue(&G(L)->l_registry);
       const TValue *gt = luaH_getint(reg, LUA_RIDX_GLOBALS);
       /* set global table as 1st upvalue of 'f' (may be LUA_ENV) */
-      setobj(L, f->l.upvals[0]->v, gt);
-      luaC_barrier(L, f->l.upvals[0], gt);
+      setobj(L, f->upvals[0]->v, gt);
+      luaC_barrier(L, f->upvals[0], gt);
     }
   }
   lua_unlock(L);
@@ -959,11 +1022,12 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
   g = G(L);
   switch (what) {
     case LUA_GCSTOP: {
-      stopgc(g);
+      g->gcrunning = 0;
       break;
     }
     case LUA_GCRESTART: {
-      g->GCdebt = 0;
+      luaE_setdebt(g, 0);
+      g->gcrunning = 1;
       break;
     }
     case LUA_GCCOLLECT: {
@@ -972,30 +1036,27 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
     }
     case LUA_GCCOUNT: {
       /* GC values are expressed in Kbytes: #bytes/2^10 */
-      res = cast_int(g->totalbytes >> 10);
+      res = cast_int(gettotalbytes(g) >> 10);
       break;
     }
     case LUA_GCCOUNTB: {
-      res = cast_int(g->totalbytes & 0x3ff);
+      res = cast_int(gettotalbytes(g) & 0x3ff);
       break;
     }
     case LUA_GCSTEP: {
-      int stopped = gcstopped(g);
       if (g->gckind == KGC_GEN) {  /* generational mode? */
         res = (g->lastmajormem == 0);  /* 1 if will do major collection */
-        luaC_step(L);  /* do a single step */
+        luaC_forcestep(L);  /* do a single step */
       }
       else {
         while (data-- >= 0) {
-          luaC_step(L);
+          luaC_forcestep(L);
           if (g->gcstate == GCSpause) {  /* end of cycle? */
             res = 1;  /* signal it */
             break;
           }
         }
       }
-      if (stopped)  /* collector was stopped? */
-        stopgc(g);  /* keep it that way */
       break;
     }
     case LUA_GCSETPAUSE: {
@@ -1014,7 +1075,7 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
       break;
     }
     case LUA_GCISRUNNING: {
-      res = !gcstopped(g);
+      res = g->gcrunning;
       break;
     }
     case LUA_GCGEN: {  /* change collector to generational mode */
@@ -1121,35 +1182,34 @@ LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
 
 
 
-
 static const char *aux_upvalue (StkId fi, int n, TValue **val,
                                 GCObject **owner) {
-  Closure *f;
-  if (!ttisclosure(fi)) return NULL;
-  f = clvalue(fi);
-  if (f->c.isC) {
-    if (!(1 <= n && n <= f->c.nupvalues)) return NULL;
-    *val = &f->c.upvalue[n-1];
-    if (owner) *owner = obj2gco(f);
-    return "";
-  }
-  else {
-    const char *name;
-    Proto *p = f->l.p;
-    if (!(1 <= n && n <= p->sizeupvalues)) return NULL;
-    *val = f->l.upvals[n-1]->v;
-    if (owner) *owner = obj2gco(f->l.upvals[n - 1]);
-    name = getstr(p->upvalues[n-1].name);
-    if (name == NULL)  /* no debug information? */
-      name = "";
-    return name;
+  switch (ttype(fi)) {
+    case LUA_TCCL: {  /* C closure */
+      CClosure *f = clCvalue(fi);
+      if (!(1 <= n && n <= f->nupvalues)) return NULL;
+      *val = &f->upvalue[n-1];
+      if (owner) *owner = obj2gco(f);
+      return "";
+    }
+    case LUA_TLCL: {  /* Lua closure */
+      LClosure *f = clLvalue(fi);
+      TString *name;
+      Proto *p = f->p;
+      if (!(1 <= n && n <= p->sizeupvalues)) return NULL;
+      *val = f->upvals[n-1]->v;
+      if (owner) *owner = obj2gco(f->upvals[n - 1]);
+      name = p->upvalues[n-1].name;
+      return (name == NULL) ? "" : getstr(name);
+    }
+    default: return NULL;  /* not a closure */
   }
 }
 
 
 LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
   const char *name;
-  TValue *val;
+  TValue *val = NULL;  /* to avoid warnings */
   lua_lock(L);
   name = aux_upvalue(index2addr(L, funcindex), n, &val, NULL);
   if (name) {
@@ -1163,8 +1223,8 @@ LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
 
 LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
   const char *name;
-  TValue *val;
-  GCObject *owner;
+  TValue *val = NULL;  /* to avoid warnings */
+  GCObject *owner = NULL;  /* to avoid warnings */
   StkId fi;
   lua_lock(L);
   fi = index2addr(L, funcindex);
@@ -1180,34 +1240,39 @@ LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
 }
 
 
-static UpVal **getupvalref (lua_State *L, int fidx, int n, Closure **pf) {
-  Closure *f;
+static UpVal **getupvalref (lua_State *L, int fidx, int n, LClosure **pf) {
+  LClosure *f;
   StkId fi = index2addr(L, fidx);
-  api_check(L, ttisclosure(fi), "Lua function expected");
-  f = clvalue(fi);
-  api_check(L, !f->c.isC, "Lua function expected");
-  api_check(L, (1 <= n && n <= f->l.p->sizeupvalues), "invalid upvalue index");
+  api_check(L, ttisLclosure(fi), "Lua function expected");
+  f = clLvalue(fi);
+  api_check(L, (1 <= n && n <= f->p->sizeupvalues), "invalid upvalue index");
   if (pf) *pf = f;
-  return &f->l.upvals[n - 1];  /* get its upvalue pointer */
+  return &f->upvals[n - 1];  /* get its upvalue pointer */
 }
 
 
 LUA_API void *lua_upvalueid (lua_State *L, int fidx, int n) {
-  Closure *f;
   StkId fi = index2addr(L, fidx);
-  api_check(L, ttisclosure(fi), "function expected");
-  f = clvalue(fi);
-  if (f->c.isC) {
-    api_check(L, 1 <= n && n <= f->c.nupvalues, "invalid upvalue index");
-    return &f->c.upvalue[n - 1];
+  switch (ttype(fi)) {
+    case LUA_TLCL: {  /* lua closure */
+      return *getupvalref(L, fidx, n, NULL);
+    }
+    case LUA_TCCL: {  /* C closure */
+      CClosure *f = clCvalue(fi);
+      api_check(L, 1 <= n && n <= f->nupvalues, "invalid upvalue index");
+      return &f->upvalue[n - 1];
+    }
+    default: {
+      api_check(L, 0, "closure expected");
+      return NULL;
+    }
   }
-  else return *getupvalref(L, fidx, n, NULL);
 }
 
 
 LUA_API void lua_upvaluejoin (lua_State *L, int fidx1, int n1,
                                             int fidx2, int n2) {
-  Closure *f1;
+  LClosure *f1;
   UpVal **up1 = getupvalref(L, fidx1, n1, &f1);
   UpVal **up2 = getupvalref(L, fidx2, n2, NULL);
   *up1 = *up2;

lauxlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.226 2010/11/10 17:38:10 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.239 2011/12/02 13:25:57 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -41,11 +41,10 @@
 ** return 1 + string at top if find a good name.
 */
 static int findfield (lua_State *L, int objidx, int level) {
-  int found = 0;
   if (level == 0 || !lua_istable(L, -1))
     return 0;  /* not found */
   lua_pushnil(L);  /* start 'next' loop */
-  while (!found && lua_next(L, -2)) {  /* for each pair in table */
+  while (lua_next(L, -2)) {  /* for each pair in table */
     if (lua_type(L, -2) == LUA_TSTRING) {  /* ignore non-string keys */
       if (lua_rawequal(L, objidx, -1)) {  /* found object? */
         lua_pop(L, 1);  /* remove value (but keep name) */
@@ -86,7 +85,7 @@ static void pushfuncname (lua_State *L, lua_Debug *ar) {
     lua_pushfstring(L, "function " LUA_QS, ar->name);
   else if (*ar->what == 'm')  /* main? */
       lua_pushfstring(L, "main chunk");
-  else if (*ar->what == 'C' || *ar->what == 't') {
+  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 */
@@ -203,6 +202,63 @@ LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
   return lua_error(L);
 }
 
+
+LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
+  int en = errno;  /* calls to Lua API may change this value */
+  if (stat) {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+  else {
+    lua_pushnil(L);
+    if (fname)
+      lua_pushfstring(L, "%s: %s", fname, strerror(en));
+    else
+      lua_pushfstring(L, "%s", strerror(en));
+    lua_pushinteger(L, en);
+    return 3;
+  }
+}
+
+
+#if !defined(inspectstat)	/* { */
+
+#if defined(LUA_USE_POSIX)
+
+#include <sys/wait.h>
+
+/*
+** use appropriate macros to interpret 'pclose' return status
+*/
+#define inspectstat(stat,what)  \
+   if (WIFEXITED(stat)) { stat = WEXITSTATUS(stat); } \
+   else if (WIFSIGNALED(stat)) { stat = WTERMSIG(stat); what = "signal"; }
+
+#else
+
+#define inspectstat(stat,what)  /* no op */
+
+#endif
+
+#endif				/* } */
+
+
+LUALIB_API int luaL_execresult (lua_State *L, int stat) {
+  const char *what = "exit";  /* type of termination */
+  if (stat == -1)  /* error? */
+    return luaL_fileresult(L, 0, NULL);
+  else {
+    inspectstat(stat, what);  /* interpret result */
+    if (*what == 'e' && stat == 0)  /* successful termination? */
+      lua_pushboolean(L, 1);
+    else
+      lua_pushnil(L);
+    lua_pushstring(L, what);
+    lua_pushinteger(L, stat);
+    return 3;  /* return true/nil,what,code */
+  }
+}
+
 /* }====================================================== */
 
 
@@ -213,7 +269,7 @@ LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
 */
 
 LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
-  lua_getfield(L, LUA_REGISTRYINDEX, tname);  /* get registry.name */
+  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);
@@ -234,7 +290,7 @@ LUALIB_API void *luaL_testudata (lua_State *L, int ud, const char *tname) {
   void *p = lua_touserdata(L, ud);
   if (p != NULL) {  /* value is a userdata? */
     if (lua_getmetatable(L, ud)) {  /* does it have a metatable? */
-      lua_getfield(L, LUA_REGISTRYINDEX, tname);  /* get correct metatable */
+      luaL_getmetatable(L, tname);  /* get correct metatable */
       if (!lua_rawequal(L, -1, -2))  /* not the same? */
         p = NULL;  /* value is a userdata with wrong metatable */
       lua_pop(L, 2);  /* remove both metatables */
@@ -274,7 +330,9 @@ LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
 
 
 LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
-  if (!lua_checkstack(L, space)) {
+  /* keep some extra space to run error routines, if needed */
+  const int extra = LUA_MINSTACK;
+  if (!lua_checkstack(L, space + extra)) {
     if (msg)
       luaL_error(L, "stack overflow (%s)", msg);
     else
@@ -384,8 +442,10 @@ LUALIB_API char *luaL_prepbuffsize (luaL_Buffer *B, size_t sz) {
       newsize = B->n + sz;
     if (newsize < B->n || newsize - B->n < sz)
       luaL_error(L, "buffer too large");
-    newbuff = (char *)lua_newuserdata(L, newsize);  /* create larger buffer */
-    memcpy(newbuff, B->b, B->n);  /* move content to new buffer */
+    /* 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))
       lua_remove(L, -2);  /* remove old buffer */
     B->b = newbuff;
@@ -397,7 +457,7 @@ 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) {
   char *b = luaL_prepbuffsize(B, l);
-  memcpy(b, s, l);
+  memcpy(b, s, l * sizeof(char));
   luaL_addsize(B, l);
 }
 
@@ -507,7 +567,7 @@ typedef struct LoadF {
 
 static const char *getF (lua_State *L, void *ud, size_t *size) {
   LoadF *lf = (LoadF *)ud;
-  (void)L;
+  (void)L;  /* not used */
   if (lf->n > 0) {  /* are there pre-read characters to be read? */
     *size = lf->n;  /* return them (chars already in buffer) */
     lf->n = 0;  /* no more pre-read characters */
@@ -564,7 +624,8 @@ static int skipcomment (LoadF *lf, int *cp) {
 }
 
 
-LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
+LUALIB_API int luaL_loadfilex (lua_State *L, const char *filename,
+                                             const char *mode) {
   LoadF lf;
   int status, readstatus;
   int c;
@@ -587,7 +648,7 @@ LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
   }
   if (c != EOF)
     lf.buff[lf.n++] = c;  /* 'c' is the first character of the stream */
-  status = lua_load(L, getF, &lf, lua_tostring(L, -1));
+  status = lua_load(L, getF, &lf, lua_tostring(L, -1), mode);
   readstatus = ferror(lf.f);
   if (filename) fclose(lf.f);  /* close file (even in case of errors) */
   if (readstatus) {
@@ -607,7 +668,7 @@ typedef struct LoadS {
 
 static const char *getS (lua_State *L, void *ud, size_t *size) {
   LoadS *ls = (LoadS *)ud;
-  (void)L;
+  (void)L;  /* not used */
   if (ls->size == 0) return NULL;
   *size = ls->size;
   ls->size = 0;
@@ -615,12 +676,12 @@ static const char *getS (lua_State *L, void *ud, size_t *size) {
 }
 
 
-LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,
-                                const char *name) {
+LUALIB_API int luaL_loadbufferx (lua_State *L, const char *buff, size_t size,
+                                 const char *name, const char *mode) {
   LoadS ls;
   ls.s = buff;
   ls.size = size;
-  return lua_load(L, getS, &ls, name);
+  return lua_load(L, getS, &ls, name, mode);
 }
 
 
@@ -700,8 +761,8 @@ LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
 */
 #if defined(LUA_COMPAT_MODULE)
 
-static const char *luaL_findtablex (lua_State *L, int idx,
-                                    const char *fname, int szhint) {
+static const char *luaL_findtable (lua_State *L, int idx,
+                                   const char *fname, int szhint) {
   const char *e;
   if (idx) lua_pushvalue(L, idx);
   do {
@@ -745,13 +806,13 @@ static int libsize (const luaL_Reg *l) {
 */
 LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
                                  int sizehint) {
-  luaL_findtablex(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
+  luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
   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_findtablex(L, 0, modname, sizehint) != NULL)
+    if (luaL_findtable(L, 0, modname, sizehint) != NULL)
       luaL_error(L, "name conflict for module " LUA_QS, modname);
     lua_pushvalue(L, -1);
     lua_setfield(L, -3, modname);  /* _LOADED[modname] = new table */
@@ -767,7 +828,10 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
     luaL_pushmodule(L, libname, libsize(l));  /* get/create library table */
     lua_insert(L, -(nup + 1));  /* move library table to below upvalues */
   }
-  luaL_setfuncs(L, l, nup);
+  if (l)
+    luaL_setfuncs(L, l, nup);
+  else
+    lua_pop(L, nup);  /* remove upvalues */
 }
 
 #endif
@@ -780,7 +844,7 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
 */
 LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
   luaL_checkstack(L, nup, "too many upvalues");
-  for (; l && l->name; l++) {  /* fill the table with given functions */
+  for (; l->name != NULL; l++) {  /* fill the table with given functions */
     int i;
     for (i = 0; i < nup; i++)  /* copy upvalues to the top */
       lua_pushvalue(L, -nup);
@@ -795,15 +859,16 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
 ** ensure that stack[idx][fname] has a table and push that table
 ** into the stack
 */
-LUALIB_API void luaL_findtable (lua_State *L, int idx, const char *fname) {
+LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
   lua_getfield(L, idx, fname);
-  if (lua_istable(L, -1)) return;  /* table already there */
+  if (lua_istable(L, -1)) return 1;  /* table already there */
   else {
     idx = lua_absindex(L, idx);
     lua_pop(L, 1);  /* remove previous result */
     lua_newtable(L);
     lua_pushvalue(L, -1);  /* copy to be left at top */
     lua_setfield(L, idx, fname);  /* assign new table to field */
+    return 0;  /* false, because did not find table there */
   }
 }
 
@@ -819,7 +884,7 @@ LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
   lua_pushcfunction(L, openf);
   lua_pushstring(L, modname);  /* argument to open function */
   lua_call(L, 1, 1);  /* open module */
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
   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 */
@@ -850,8 +915,7 @@ LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
 
 
 static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
-  (void)ud;
-  (void)osize;
+  (void)ud; (void)osize;  /* not used */
   if (nsize == 0) {
     free(ptr);
     return NULL;
@@ -880,7 +944,7 @@ LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) {
   if (v != lua_version(NULL))
     luaL_error(L, "multiple Lua VMs detected");
   else if (*v != ver)
-    luaL_error(L, "version mismatch: app. needs %d, Lua core provides %f",
+    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);

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.112 2010/11/16 17:43:29 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.119 2011/11/14 17:10:24 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -62,6 +62,9 @@ LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
 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);
+
 /* pre-defined references */
 #define LUA_NOREF       (-2)
 #define LUA_REFNIL      (-1)
@@ -69,9 +72,13 @@ LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
 LUALIB_API int (luaL_ref) (lua_State *L, int t);
 LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
 
-LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
-LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
-                                  const char *name);
+LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
+                                               const char *mode);
+
+#define luaL_loadfile(L,f)	luaL_loadfilex(L,f,NULL)
+
+LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
+                                   const char *name, const char *mode);
 LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
 
 LUALIB_API lua_State *(luaL_newstate) (void);
@@ -83,7 +90,7 @@ LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
 
 LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
 
-LUALIB_API void (luaL_findtable) (lua_State *L, int idx, const char *fname);
+LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
 
 LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
                                   const char *msg, int level);
@@ -124,6 +131,8 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
 
 #define luaL_opt(L,f,n,d)	(lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
 
+#define luaL_loadbuffer(L,s,sz,n)	luaL_loadbufferx(L,s,sz,n,NULL)
+
 
 /*
 ** {======================================================
@@ -160,7 +169,33 @@ LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
 /* }====================================================== */
 
 
+
+/*
+** {======================================================
+** File handles for IO library
+** =======================================================
+*/
+
+/*
+** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
+** initial structure 'luaL_Stream' (it may contain other fields
+** after that initial structure).
+*/
+
+#define LUA_FILEHANDLE          "FILE*"
+
+
+typedef struct luaL_Stream {
+  FILE *f;  /* stream (NULL for incompletely created streams) */
+  lua_CFunction closef;  /* to close stream (NULL for closed streams) */
+} luaL_Stream;
+
+/* }====================================================== */
+
+
+
 /* compatibility with old module system */
+#if defined(LUA_COMPAT_MODULE)
 
 LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname,
                                    int sizehint);
@@ -169,6 +204,8 @@ LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
 
 #define luaL_register(L,n,l)	(luaL_openlib(L,(n),(l),0))
 
+#endif
+
 
 #endif
 

lbaselib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.250 2010/09/07 19:38:36 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.272 2011/11/30 12:42:21 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -32,44 +32,56 @@ 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, LUA_QL("tostring") " must return a string to "
-                           LUA_QL("print"));
+      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 */
   }
-  luai_writestring("\n", 1);
+  luai_writeline();
   return 0;
 }
 
 
+#define SPACECHARS	" \f\n\r\t\v"
+
 static int luaB_tonumber (lua_State *L) {
-  int base = luaL_optint(L, 2, 10);
-  if (base == 10) {  /* standard conversion */
-    luaL_checkany(L, 1);
-    if (lua_isnumber(L, 1)) {
-      lua_pushnumber(L, lua_tonumber(L, 1));
+  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 not a number; must be something */
+    luaL_checkany(L, 1);
   }
   else {
-    const char *s1 = luaL_checkstring(L, 1);
-    char *s2;
-    unsigned long n;
+    size_t 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");
-    while (isspace((unsigned char)(*s1))) s1++;  /* skip initial spaces */
-    if (*s1 == '-') { s1++; neg = 1; }
-    n = strtoul(s1, &s2, base);
-    if (s1 != s2) {  /* at least one valid digit? */
-      while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
-      if (*s2 == '\0') {  /* no invalid trailing characters? */
-        lua_pushnumber(L, (neg) ? -(lua_Number)n : (lua_Number)n);
+    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 */
   }
-  lua_pushnil(L);  /* else not a number */
+  lua_pushnil(L);  /* not a number */
   return 1;
 }
 
@@ -110,13 +122,6 @@ static int luaB_setmetatable (lua_State *L) {
 }
 
 
-static int luaB_getfenv (lua_State *L) {
-  return luaL_error(L, "getfenv/setfenv deprecated");
-}
-
-#define luaB_setfenv	luaB_getfenv
-
-
 static int luaB_rawequal (lua_State *L) {
   luaL_checkany(L, 1);
   luaL_checkany(L, 2);
@@ -125,6 +130,15 @@ static int luaB_rawequal (lua_State *L) {
 }
 
 
+static int luaB_rawlen (lua_State *L) {
+  int t = lua_type(L, 1);
+  luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
+                   "table or string expected");
+  lua_pushinteger(L, lua_rawlen(L, 1));
+  return 1;
+}
+
+
 static int luaB_rawget (lua_State *L) {
   luaL_checktype(L, 1, LUA_TTABLE);
   luaL_checkany(L, 2);
@@ -146,7 +160,7 @@ 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",
-    "setmajorinc", "isrunning", "gen", "inc", 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_GCSETMAJORINC, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
@@ -241,7 +255,14 @@ static int load_aux (lua_State *L, int status) {
 
 static int luaB_loadfile (lua_State *L) {
   const char *fname = luaL_optstring(L, 1, NULL);
-  return load_aux(L, luaL_loadfile(L, fname));
+  const char *mode = luaL_optstring(L, 2, NULL);
+  int env = !lua_isnone(L, 3);  /* 'env' parameter? */
+  int status = luaL_loadfilex(L, fname, mode);
+  if (status == LUA_OK && env) {  /* 'env' parameter? */
+    lua_pushvalue(L, 3);
+    lua_setupvalue(L, -2, 1);  /* set it as 1st upvalue of loaded chunk */
+  }
+  return load_aux(L, status);
 }
 
 
@@ -251,20 +272,13 @@ static int luaB_loadfile (lua_State *L) {
 ** =======================================================
 */
 
-static const char *checkrights (lua_State *L, const char *mode, const char *s) {
-  if (strchr(mode, 'b') == NULL && *s == LUA_SIGNATURE[0])
-    return lua_pushstring(L, "attempt to load a binary chunk");
-  if (strchr(mode, 't') == NULL && *s != LUA_SIGNATURE[0])
-    return lua_pushstring(L, "attempt to load a text chunk");
-  return NULL;  /* chunk in allowed format */
-}
-
 
 /*
-** reserves a slot, above all arguments, to hold a copy of the returned
-** string to avoid it being collected while parsed
+** reserved slot, above all arguments, to hold a copy of the returned
+** string to avoid it being collected while parsed. 'load' has four
+** optional arguments (chunk, source name, mode, and environment).
 */
-#define RESERVEDSLOT	4
+#define RESERVEDSLOT	5
 
 
 /*
@@ -273,83 +287,45 @@ static const char *checkrights (lua_State *L, const char *mode, const char *s) {
 ** stack top. Instead, it keeps its resulting string in a
 ** reserved slot inside the stack.
 */
-typedef struct {  /* reader state */
-  int f;  /* position of reader function on stack */
-  const char *mode;  /* allowed modes (binary/text) */
-} Readstat;
-
 static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
-  const char *s;
-  Readstat *stat = (Readstat *)ud;
+  (void)(ud);  /* not used */
   luaL_checkstack(L, 2, "too many nested functions");
-  lua_pushvalue(L, stat->f);  /* get function */
+  lua_pushvalue(L, 1);  /* get function */
   lua_call(L, 0, 1);  /* call it */
   if (lua_isnil(L, -1)) {
     *size = 0;
     return NULL;
   }
-  else if ((s = lua_tostring(L, -1)) != NULL) {
-    if (stat->mode != NULL) {  /* first time? */
-      s = checkrights(L, stat->mode, s);  /* check mode */
-      stat->mode = NULL;  /* to avoid further checks */
-      if (s) luaL_error(L, s);
-    }
-    lua_replace(L, RESERVEDSLOT);  /* save string in reserved slot */
-    return lua_tolstring(L, RESERVEDSLOT, size);
-  }
-  else {
+  else if (!lua_isstring(L, -1))
     luaL_error(L, "reader function must return a string");
-    return NULL;  /* to avoid warnings */
-  }
-}
-
-
-static int luaB_load_aux (lua_State *L, int farg) {
-  int status;
-  Readstat stat;
-  size_t l;
-  const char *s = lua_tolstring(L, farg, &l);
-  stat.mode = luaL_optstring(L, farg + 2, "bt");
-  if (s != NULL) {  /* loading a string? */
-    const char *chunkname = luaL_optstring(L, farg + 1, s);
-    status = (checkrights(L, stat.mode, s) != NULL)
-           || luaL_loadbuffer(L, s, l, chunkname);
-  }
-  else {  /* loading from a reader function */
-    const char *chunkname = luaL_optstring(L, farg + 1, "=(load)");
-    luaL_checktype(L, farg, LUA_TFUNCTION);
-    stat.f = farg;
-    lua_settop(L, RESERVEDSLOT);  /* create reserved slot */
-    status = lua_load(L, generic_reader, &stat, chunkname);
-  }
-  return load_aux(L, status);
+  lua_replace(L, RESERVEDSLOT);  /* save string in reserved slot */
+  return lua_tolstring(L, RESERVEDSLOT, size);
 }
 
 
 static int luaB_load (lua_State *L) {
-  return luaB_load_aux(L, 1);
-}
-
-
-static int luaB_loadin (lua_State *L) {
-  int n;
-  luaL_checkany(L, 1);
-  n = luaB_load_aux(L, 2);
-  if (n == 1) {  /* success? */
-    lua_pushvalue(L, 1);  /* environment for loaded function */
-    if (lua_setupvalue(L, -2, 1) == NULL)
-      luaL_error(L, "loaded chunk does not have an upvalue");
+  int status;
+  size_t l;
+  int top = lua_gettop(L);
+  const char *s = lua_tolstring(L, 1, &l);
+  const char *mode = luaL_optstring(L, 3, "bt");
+  if (s != NULL) {  /* loading a string? */
+    const char *chunkname = luaL_optstring(L, 2, s);
+    status = luaL_loadbufferx(L, s, l, chunkname, mode);
   }
-  return n;
+  else {  /* loading from a reader function */
+    const char *chunkname = luaL_optstring(L, 2, "=(load)");
+    luaL_checktype(L, 1, LUA_TFUNCTION);
+    lua_settop(L, RESERVEDSLOT);  /* create reserved slot */
+    status = lua_load(L, generic_reader, NULL, chunkname, mode);
+  }
+  if (status == LUA_OK && top >= 4) {  /* is there an 'env' argument */
+    lua_pushvalue(L, 4);  /* environment for loaded function */
+    lua_setupvalue(L, -2, 1);  /* set it as 1st upvalue */
+  }
+  return load_aux(L, status);
 }
 
-
-static int luaB_loadstring (lua_State *L) {
-  lua_settop(L, 2);
-  lua_pushliteral(L, "tb");
-  return luaB_load(L);  /* dostring(s, n) == load(s, n, "tb") */
-
-}
 /* }====================================================== */
 
 
@@ -390,27 +366,32 @@ static int luaB_select (lua_State *L) {
 }
 
 
-static int pcallcont (lua_State *L) {
-  int errfunc;  /* call has an error function in bottom of the stack */
-  int status = lua_getctx(L, &errfunc);
-  lua_assert(status != LUA_OK);
-  lua_pushboolean(L, (status == LUA_YIELD));  /* first result (status) */
-  if (errfunc)  /* came from xpcall? */
-    lua_replace(L, 1);  /* put first result in place of error function */
-  else  /* came from pcall */
-    lua_insert(L, 1);  /* open space for first result */
+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 */
+  }
+  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);
-  status = lua_pcallk(L, lua_gettop(L) - 1, LUA_MULTRET, 0, 0, pcallcont);
-  luaL_checkstack(L, 1, NULL);
-  lua_pushboolean(L, (status == LUA_OK));
-  lua_insert(L, 1);
-  return lua_gettop(L);  /* return status + all results */
+  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));
 }
 
 
@@ -421,11 +402,8 @@ static int luaB_xpcall (lua_State *L) {
   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, 1, pcallcont);
-  luaL_checkstack(L, 1, NULL);
-  lua_pushboolean(L, (status == LUA_OK));
-  lua_replace(L, 1);
-  return lua_gettop(L);  /* return status + all results */
+  status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 0, pcallcont);
+  return finishpcall(L, (status == LUA_OK));
 }
 
 
@@ -436,55 +414,27 @@ static int luaB_tostring (lua_State *L) {
 }
 
 
-static int luaB_newproxy (lua_State *L) {
-  lua_settop(L, 1);
-  lua_newuserdata(L, 0);  /* create proxy */
-  if (lua_toboolean(L, 1) == 0)
-    return 1;  /* no metatable */
-  else if (lua_isboolean(L, 1)) {
-    lua_createtable(L, 0, 1);  /* create a new metatable `m' ... */
-    lua_pushboolean(L, 1);
-    lua_setfield(L, -2, "__gc");  /* ... m.__gc = false (HACK!!)... */
-    lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */
-    lua_pushboolean(L, 1);
-    lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */
-  }
-  else {
-    int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */
-    if (lua_getmetatable(L, 1)) {
-      lua_rawget(L, lua_upvalueindex(1));
-      validproxy = lua_toboolean(L, -1);
-      lua_pop(L, 1);  /* remove value */
-    }
-    luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
-    lua_getmetatable(L, 1);  /* metatable is valid; get it */
-  }
-  lua_setmetatable(L, 2);
-  return 1;
-}
-
-
 static const luaL_Reg base_funcs[] = {
   {"assert", luaB_assert},
   {"collectgarbage", luaB_collectgarbage},
   {"dofile", luaB_dofile},
   {"error", luaB_error},
-  {"getfenv", luaB_getfenv},
   {"getmetatable", luaB_getmetatable},
   {"ipairs", luaB_ipairs},
   {"loadfile", luaB_loadfile},
   {"load", luaB_load},
-  {"loadin", luaB_loadin},
-  {"loadstring", luaB_loadstring},
+#if defined(LUA_COMPAT_LOADSTRING)
+  {"loadstring", luaB_load},
+#endif
   {"next", luaB_next},
   {"pairs", luaB_pairs},
   {"pcall", luaB_pcall},
   {"print", luaB_print},
   {"rawequal", luaB_rawequal},
+  {"rawlen", luaB_rawlen},
   {"rawget", luaB_rawget},
   {"rawset", luaB_rawset},
   {"select", luaB_select},
-  {"setfenv", luaB_setfenv},
   {"setmetatable", luaB_setmetatable},
   {"tonumber", luaB_tonumber},
   {"tostring", luaB_tostring},
@@ -503,14 +453,6 @@ LUAMOD_API int luaopen_base (lua_State *L) {
   luaL_setfuncs(L, base_funcs, 0);
   lua_pushliteral(L, LUA_VERSION);
   lua_setfield(L, -2, "_VERSION");  /* set global _VERSION */
-  /* `newproxy' needs a weaktable as upvalue */
-  lua_createtable(L, 0, 1);  /* new table `w' */
-  lua_pushvalue(L, -1);  /* `w' will be its own metatable */
-  lua_setmetatable(L, -2);
-  lua_pushliteral(L, "kv");
-  lua_setfield(L, -2, "__mode");  /* metatable(w).__mode = "kv" */
-  lua_pushcclosure(L, luaB_newproxy, 1);
-  lua_setfield(L, -2, "newproxy");  /* set global `newproxy' */
   return 1;
 }
 

lbitlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbitlib.c,v 1.12 2010/11/22 16:39:20 roberto Exp roberto $
+** $Id: lbitlib.c,v 1.15 2010/12/17 13:26:38 roberto Exp roberto $
 ** Standard library for bitwise operations
 ** See Copyright Notice in lua.h
 */
@@ -14,25 +14,30 @@
 
 
 /* number of bits to consider in a number */
-#define NBITS	32
+#if !defined(LUA_NBITS)
+#define LUA_NBITS	32
+#endif
 
-#define ALLONES		(~(((~(lua_Unsigned)0) << (NBITS - 1)) << 1))
 
-/* mask to trim extra bits */
+#define ALLONES		(~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
+
+/* macro to trim extra bits */
 #define trim(x)		((x) & ALLONES)
 
 
+/* builds a number with 'n' ones (1 <= n <= LUA_NBITS) */
+#define mask(n)		(~((ALLONES << 1) << ((n) - 1)))
+
+
 typedef lua_Unsigned b_uint;
 
 
-#define getuintarg(L,arg)	luaL_checkunsigned(L,arg)
-
 
 static b_uint andaux (lua_State *L) {
   int i, n = lua_gettop(L);
   b_uint r = ~(b_uint)0;
   for (i = 1; i <= n; i++)
-    r &= getuintarg(L, i);
+    r &= luaL_checkunsigned(L, i);
   return trim(r);
 }
 
@@ -55,7 +60,7 @@ static int b_or (lua_State *L) {
   int i, n = lua_gettop(L);
   b_uint r = 0;
   for (i = 1; i <= n; i++)
-    r |= getuintarg(L, i);
+    r |= luaL_checkunsigned(L, i);
   lua_pushunsigned(L, trim(r));
   return 1;
 }
@@ -65,14 +70,14 @@ static int b_xor (lua_State *L) {
   int i, n = lua_gettop(L);
   b_uint r = 0;
   for (i = 1; i <= n; i++)
-    r ^= getuintarg(L, i);
+    r ^= luaL_checkunsigned(L, i);
   lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
 static int b_not (lua_State *L) {
-  b_uint r = ~getuintarg(L, 1);
+  b_uint r = ~luaL_checkunsigned(L, 1);
   lua_pushunsigned(L, trim(r));
   return 1;
 }
@@ -82,11 +87,11 @@ static int b_shift (lua_State *L, b_uint r, int i) {
   if (i < 0) {  /* shift right? */
     i = -i;
     r = trim(r);
-    if (i >= NBITS) r = 0;
+    if (i >= LUA_NBITS) r = 0;
     else r >>= i;
   }
   else {  /* shift left */
-    if (i >= NBITS) r = 0;
+    if (i >= LUA_NBITS) r = 0;
     else r <<= i;
     r = trim(r);
   }
@@ -96,22 +101,22 @@ static int b_shift (lua_State *L, b_uint r, int i) {
 
 
 static int b_lshift (lua_State *L) {
-  return b_shift(L, getuintarg(L, 1), luaL_checkint(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, getuintarg(L, 1), -luaL_checkint(L, 2));
+  return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkint(L, 2));
 }
 
 
 static int b_arshift (lua_State *L) {
-  b_uint r = getuintarg(L, 1);
+  b_uint r = luaL_checkunsigned(L, 1);
   int i = luaL_checkint(L, 2);
-  if (i < 0 || !(r & ((b_uint)1 << (NBITS - 1))))
+  if (i < 0 || !(r & ((b_uint)1 << (LUA_NBITS - 1))))
     return b_shift(L, r, -i);
   else {  /* arithmetic shift for 'negative' number */
-    if (i >= NBITS) r = ALLONES;
+    if (i >= LUA_NBITS) r = ALLONES;
     else
       r = trim((r >> i) | ~(~(b_uint)0 >> i));  /* add signal bit */
     lua_pushunsigned(L, r);
@@ -121,10 +126,10 @@ static int b_arshift (lua_State *L) {
 
 
 static int b_rot (lua_State *L, int i) {
-  b_uint r = getuintarg(L, 1);
-  i &= (NBITS - 1);  /* i = i % NBITS */
+  b_uint r = luaL_checkunsigned(L, 1);
+  i &= (LUA_NBITS - 1);  /* i = i % NBITS */
   r = trim(r);
-  r = (r << i) | (r >> (NBITS - i));
+  r = (r << i) | (r >> (LUA_NBITS - i));
   lua_pushunsigned(L, trim(r));
   return 1;
 }
@@ -140,17 +145,58 @@ static int b_rrot (lua_State *L) {
 }
 
 
+/*
+** get field and width arguments for field-manipulation functions,
+** checking whether they are valid
+*/
+static int fieldargs (lua_State *L, int farg, int *width) {
+  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 = w;
+  return f;
+}
+
+
+static int b_extract (lua_State *L) {
+  int w;
+  b_uint r = luaL_checkunsigned(L, 1);
+  int f = fieldargs(L, 2, &w);
+  r = (r >> f) & mask(w);
+  lua_pushunsigned(L, r);
+  return 1;
+}
+
+
+static int b_replace (lua_State *L) {
+  int w;
+  b_uint r = luaL_checkunsigned(L, 1);
+  b_uint v = luaL_checkunsigned(L, 2);
+  int f = fieldargs(L, 3, &w);
+  int m = mask(w);
+  v &= m;  /* erase bits outside given width */
+  r = (r & ~(m << f)) | (v << f);
+  lua_pushunsigned(L, r);
+  return 1;
+}
+
+
 static const luaL_Reg bitlib[] = {
   {"arshift", b_arshift},
   {"band", b_and},
   {"bnot", b_not},
   {"bor", b_or},
   {"bxor", b_xor},
+  {"btest", b_test},
+  {"extract", b_extract},
   {"lrotate", b_lrot},
   {"lshift", b_lshift},
+  {"replace", b_replace},
   {"rrotate", b_rrot},
   {"rshift", b_rshift},
-  {"btest", b_test},
   {NULL, NULL}
 };
 

lcode.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 2.48 2010/07/02 20:42:40 roberto Exp roberto $
+** $Id: lcode.c,v 2.59 2011/08/15 19:41:58 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -23,6 +23,7 @@
 #include "lparser.h"
 #include "lstring.h"
 #include "ltable.h"
+#include "lvm.h"
 
 
 #define hasjumps(e)	((e)->t != (e)->f)
@@ -35,19 +36,23 @@ static int isnumeral(expdesc *e) {
 
 void luaK_nil (FuncState *fs, int from, int n) {
   Instruction *previous;
+  int l = from + n - 1;  /* last register to set nil */
   if (fs->pc > fs->lasttarget) {  /* no jumps to current position? */
     previous = &fs->f->code[fs->pc-1];
     if (GET_OPCODE(*previous) == OP_LOADNIL) {
       int pfrom = GETARG_A(*previous);
-      int pto = GETARG_B(*previous);
-      if (pfrom <= from && from <= pto+1) {  /* can connect both? */
-        if (from+n-1 > pto)
-          SETARG_B(*previous, from+n-1);
+      int pl = pfrom + GETARG_B(*previous);
+      if ((pfrom <= from && from <= pl + 1) ||
+          (from <= pfrom && pfrom <= l + 1)) {  /* can connect both? */
+        if (pfrom < from) from = pfrom;  /* from = min(from, pfrom) */
+        if (pl > l) l = pl;  /* l = max(l, pl) */
+        SETARG_A(*previous, from);
+        SETARG_B(*previous, l - from);
         return;
       }
-    }
+    }  /* else go through */
   }
-  luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0);  /* else no optimization */
+  luaK_codeABC(fs, OP_LOADNIL, from, n - 1, 0);  /* else no optimization */
 }
 
 
@@ -171,6 +176,19 @@ void luaK_patchlist (FuncState *fs, int list, int target) {
 }
 
 
+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);
+    lua_assert(GET_OPCODE(fs->f->code[list]) == OP_JMP &&
+                (GETARG_A(fs->f->code[list]) == 0 ||
+                 GETARG_A(fs->f->code[list]) >= level));
+    SETARG_A(fs->f->code[list], level);
+    list = next;
+  }
+}
+
+
 void luaK_patchtohere (FuncState *fs, int list) {
   luaK_getlabel(fs);
   luaK_concat(fs, &fs->jpc, list);
@@ -195,11 +213,11 @@ static int luaK_code (FuncState *fs, Instruction i) {
   Proto *f = fs->f;
   dischargejpc(fs);  /* `pc' will change */
   /* put new instruction in code array */
-  luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
+  luaM_growvector(fs->ls->L, f->code, fs->pc, f->sizecode, Instruction,
                   MAX_INT, "opcodes");
   f->code[fs->pc] = i;
   /* save corresponding line information */
-  luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
+  luaM_growvector(fs->ls->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
                   MAX_INT, "opcodes");
   f->lineinfo[fs->pc] = fs->ls->lastline;
   return fs->pc++;
@@ -229,11 +247,11 @@ static int codeextraarg (FuncState *fs, int a) {
 }
 
 
-int luaK_codeABxX (FuncState *fs, OpCode o, int reg, int k) {
-  if (k < MAXARG_Bx)
-    return luaK_codeABx(fs, o, reg, k + 1);
+int luaK_codek (FuncState *fs, int reg, int k) {
+  if (k <= MAXARG_Bx)
+    return luaK_codeABx(fs, OP_LOADK, reg, k);
   else {
-    int p = luaK_codeABx(fs, o, reg, 0);
+    int p = luaK_codeABx(fs, OP_LOADKX, reg, 0);
     codeextraarg(fs, k);
     return p;
   }
@@ -271,14 +289,14 @@ static void freeexp (FuncState *fs, expdesc *e) {
 
 
 static int addk (FuncState *fs, TValue *key, TValue *v) {
-  lua_State *L = fs->L;
+  lua_State *L = fs->ls->L;
   TValue *idx = luaH_set(L, fs->h, key);
   Proto *f = fs->f;
   int k, oldsize;
   if (ttisnumber(idx)) {
     lua_Number n = nvalue(idx);
     lua_number2int(k, n);
-    if (luaO_rawequalObj(&f->k[k], v))
+    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 */
@@ -286,6 +304,8 @@ static int addk (FuncState *fs, TValue *key, TValue *v) {
   /* 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 */
   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++]);
@@ -298,14 +318,14 @@ static int addk (FuncState *fs, TValue *key, TValue *v) {
 
 int luaK_stringK (FuncState *fs, TString *s) {
   TValue o;
-  setsvalue(fs->L, &o, s);
+  setsvalue(fs->ls->L, &o, s);
   return addk(fs, &o, &o);
 }
 
 
 int luaK_numberK (FuncState *fs, lua_Number r) {
   int n;
-  lua_State *L = fs->L;
+  lua_State *L = fs->ls->L;
   TValue o;
   setnvalue(&o, r);
   if (r == 0 || luai_numisnan(NULL, r)) {  /* handle -0 and NaN */
@@ -332,7 +352,7 @@ static int nilK (FuncState *fs) {
   TValue k, v;
   setnilvalue(&v);
   /* cannot use nil as key; instead use table itself to represent nil */
-  sethvalue(fs->L, &k, fs->h);
+  sethvalue(fs->ls->L, &k, fs->h);
   return addk(fs, &k, &v);
 }
 
@@ -564,15 +584,15 @@ void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {
 
 
 void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
-  int func;
+  int ereg;
   luaK_exp2anyreg(fs, e);
+  ereg = e->u.info;  /* register where 'e' was placed */
   freeexp(fs, e);
-  func = fs->freereg;
-  luaK_codeABC(fs, OP_SELF, func, e->u.info, luaK_exp2RK(fs, key));
-  freeexp(fs, key);
-  luaK_reserveregs(fs, 2);
-  e->u.info = func;
+  e->u.info = fs->freereg;  /* base register for op_self */
   e->k = VNONRELOC;
+  luaK_reserveregs(fs, 2);  /* function and 'self' produced by op_self */
+  luaK_codeABC(fs, OP_SELF, e->u.info, ereg, luaK_exp2RK(fs, key));
+  freeexp(fs, key);
 }
 
 
@@ -603,21 +623,14 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
   int pc;  /* pc of last jump */
   luaK_dischargevars(fs, e);
   switch (e->k) {
-    case VK: case VKNUM: case VTRUE: {
-      pc = NO_JUMP;  /* always true; do nothing */
-      break;
-    }
     case VJMP: {
       invertjump(fs, e);
       pc = e->u.info;
       break;
     }
-    case VFALSE: {
-      if (!hasjumps(e)) {
-        pc = luaK_jump(fs);  /* always jump */
-        break;
-      }
-      /* else go through */
+    case VK: case VKNUM: case VTRUE: {
+      pc = NO_JUMP;  /* always true; do nothing */
+      break;
     }
     default: {
       pc = jumponcond(fs, e, 0);
@@ -630,24 +643,17 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
 }
 
 
-static void luaK_goiffalse (FuncState *fs, expdesc *e) {
+void luaK_goiffalse (FuncState *fs, expdesc *e) {
   int pc;  /* pc of last jump */
   luaK_dischargevars(fs, e);
   switch (e->k) {
-    case VNIL: case VFALSE: {
-      pc = NO_JUMP;  /* always false; do nothing */
-      break;
-    }
     case VJMP: {
       pc = e->u.info;
       break;
     }
-    case VTRUE: {
-      if (!hasjumps(e)) {
-        pc = luaK_jump(fs);  /* always jump */
-        break;
-      }
-      /* else go through */
+    case VNIL: case VFALSE: {
+      pc = NO_JUMP;  /* always false; do nothing */
+      break;
     }
     default: {
       pc = jumponcond(fs, e, 1);

lcode.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h,v 1.54 2010/04/17 12:46:32 roberto Exp roberto $
+** $Id: lcode.h,v 1.57 2011/04/07 18:14:12 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -44,11 +44,9 @@ typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
 
 #define luaK_jumpto(fs,t)	luaK_patchlist(fs, luaK_jump(fs), t)
 
-#define luaK_codek(fs,reg,k)	    luaK_codeABxX(fs, OP_LOADK, reg, k)
-
 LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
 LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
-LUAI_FUNC int luaK_codeABxX (FuncState *fs, OpCode o, int reg, int k);
+LUAI_FUNC int luaK_codek (FuncState *fs, int reg, int k);
 LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
 LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
 LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
@@ -64,6 +62,7 @@ LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e);
 LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
 LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
 LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_goiffalse (FuncState *fs, expdesc *e);
 LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
 LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
 LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
@@ -71,6 +70,7 @@ LUAI_FUNC int luaK_jump (FuncState *fs);
 LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
 LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
 LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
+LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level);
 LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
 LUAI_FUNC int luaK_getlabel (FuncState *fs);
 LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line);

lcorolib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lcorolib.c,v 1.1 2010/06/10 21:30:26 roberto Exp roberto $
+** $Id: lcorolib.c,v 1.2 2010/07/02 11:38:13 roberto Exp roberto $
 ** Coroutine Library
 ** See Copyright Notice in lua.h
 */
@@ -28,7 +28,7 @@ static int auxresume (lua_State *L, lua_State *co, int narg) {
     return -1;  /* error flag */
   }
   lua_xmove(L, co, narg);
-  status = lua_resume(co, narg);
+  status = lua_resume(co, L, narg);
   if (status == LUA_OK || status == LUA_YIELD) {
     int nres = lua_gettop(co);
     if (!lua_checkstack(L, nres + 1)) {

lctype.c

@@ -1,45 +1,52 @@
 /*
-** $Id: lctype.c,v 1.7 2009/05/27 16:51:15 roberto Exp roberto $
+** $Id: lctype.c,v 1.10 2011/06/24 12:25:33 roberto Exp roberto $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */
 
-#include <limits.h>
+#define lctype_c
+#define LUA_CORE
 
 #include "lctype.h"
 
+#if !LUA_USE_CTYPE	/* { */
+
+#include <limits.h>
+
 LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = {
   0x00,  /* EOZ */
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 0. */
   0x00,  0x08,  0x08,  0x08,  0x08,  0x08,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 1. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x0c,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,
+  0x0c,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,	/* 2. */
   0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,
-  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,
+  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,  0x16,	/* 3. */
   0x16,  0x16,  0x04,  0x04,  0x04,  0x04,  0x04,  0x04,
-  0x04,  0x35,  0x35,  0x35,  0x35,  0x35,  0x35,  0x25,
-  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,
-  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,  0x25,
-  0x25,  0x25,  0x25,  0x04,  0x04,  0x04,  0x04,  0x05,
-  0x04,  0x15,  0x15,  0x15,  0x15,  0x15,  0x15,  0x05,
+  0x04,  0x15,  0x15,  0x15,  0x15,  0x15,  0x15,  0x05,	/* 4. */
   0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,	/* 5. */
+  0x05,  0x05,  0x05,  0x04,  0x04,  0x04,  0x04,  0x05,
+  0x04,  0x15,  0x15,  0x15,  0x15,  0x15,  0x15,  0x05,	/* 6. */
   0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,
+  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,  0x05,	/* 7. */
   0x05,  0x05,  0x05,  0x04,  0x04,  0x04,  0x04,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 8. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* 9. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* a. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* b. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* c. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* d. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* e. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
-  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
+  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,	/* f. */
   0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,  0x00,
 };
+
+#endif			/* } */

lctype.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lctype.h,v 1.7 2009/05/27 16:51:15 roberto Exp roberto $
+** $Id: lctype.h,v 1.11 2011/06/27 18:22:46 roberto Exp roberto $
 ** 'ctype' functions for Lua
 ** See Copyright Notice in lua.h
 */
@@ -7,11 +7,32 @@
 #ifndef lctype_h
 #define lctype_h
 
+#include "lua.h"
+
+
+/*
+** WARNING: the functions defined here do not necessarily correspond
+** to the similar functions in the standard C ctype.h. They are
+** optimized for the specific needs of Lua
+*/
+
+#if !defined(LUA_USE_CTYPE)
+
+#if 'A' == 65 && '0' == 48
+/* ASCII case: can use its own tables; faster and fixed */
+#define LUA_USE_CTYPE	0
+#else
+/* must use standard C ctype */
+#define LUA_USE_CTYPE	1
+#endif
+
+#endif
+
+
+#if !LUA_USE_CTYPE	/* { */
 
 #include <limits.h>
 
-#include "lua.h"
-
 #include "llimits.h"
 
 
@@ -20,7 +41,6 @@
 #define PRINTBIT	2
 #define SPACEBIT	3
 #define XDIGITBIT	4
-#define UPPERBIT	5
 
 
 #define MASK(B)		(1 << (B))
@@ -36,15 +56,40 @@
 */
 #define lislalpha(c)	testprop(c, MASK(ALPHABIT))
 #define lislalnum(c)	testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
-#define lisupper(c)	testprop(c, MASK(UPPERBIT))
 #define lisdigit(c)	testprop(c, MASK(DIGITBIT))
 #define lisspace(c)	testprop(c, MASK(SPACEBIT))
 #define lisprint(c)	testprop(c, MASK(PRINTBIT))
 #define lisxdigit(c)	testprop(c, MASK(XDIGITBIT))
 
+/*
+** this 'ltolower' only works for alphabetic characters
+*/
+#define ltolower(c)	((c) | ('A' ^ 'a'))
 
-/* one more entry for 0 and one more for -1 (EOZ) */
+
+/* two more entries for 0 and -1 (EOZ) */
 LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
 
+
+#else			/* }{ */
+
+/*
+** use standard C ctypes
+*/
+
+#include <ctype.h>
+
+
+#define lislalpha(c)	(isalpha(c) || (c) == '_')
+#define lislalnum(c)	(isalnum(c) || (c) == '_')
+#define lisdigit(c)	(isdigit(c))
+#define lisspace(c)	(isspace(c))
+#define lisprint(c)	(isprint(c))
+#define lisxdigit(c)	(isxdigit(c))
+
+#define ltolower(c)	(tolower(c))
+
+#endif			/* } */
+
 #endif
 

ldblib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.125 2010/11/10 18:06:10 roberto Exp roberto $
+** $Id: ldblib.c,v 1.130 2011/04/08 19:17:36 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -18,6 +18,9 @@
 #include "lualib.h"
 
 
+#define HOOKKEY		"_HKEY"
+
+
 
 static int db_getregistry (lua_State *L) {
   lua_pushvalue(L, LUA_REGISTRYINDEX);
@@ -39,8 +42,8 @@ static int db_setmetatable (lua_State *L) {
   luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
                     "nil or table expected");
   lua_settop(L, 2);
-  lua_pushboolean(L, lua_setmetatable(L, 1));
-  return 1;
+  lua_setmetatable(L, 1);
+  return 1;  /* return 1st argument */
 }
 
 
@@ -250,16 +253,14 @@ static int db_upvaluejoin (lua_State *L) {
 }
 
 
-static const char KEY_HOOK = 'h';
+#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_pushlightuserdata(L, (void *)&KEY_HOOK);
-  lua_rawget(L, LUA_REGISTRYINDEX);
-  lua_pushlightuserdata(L, L);
-  lua_rawget(L, -2);
+  gethooktable(L);
+  lua_rawgetp(L, -1, L);
   if (lua_isfunction(L, -1)) {
     lua_pushstring(L, hooknames[(int)ar->event]);
     if (ar->currentline >= 0)
@@ -291,19 +292,6 @@ static char *unmakemask (int mask, char *smask) {
 }
 
 
-static void gethooktable (lua_State *L) {
-  lua_pushlightuserdata(L, (void *)&KEY_HOOK);
-  lua_rawget(L, LUA_REGISTRYINDEX);
-  if (!lua_istable(L, -1)) {
-    lua_pop(L, 1);
-    lua_createtable(L, 0, 1);
-    lua_pushlightuserdata(L, (void *)&KEY_HOOK);
-    lua_pushvalue(L, -2);
-    lua_rawset(L, LUA_REGISTRYINDEX);
-  }
-}
-
-
 static int db_sethook (lua_State *L) {
   int arg, mask, count;
   lua_Hook func;
@@ -319,9 +307,8 @@ static int db_sethook (lua_State *L) {
     func = hookf; mask = makemask(smask, count);
   }
   gethooktable(L);
-  lua_pushlightuserdata(L, L1);
   lua_pushvalue(L, arg+1);
-  lua_rawset(L, -3);  /* set new hook */
+  lua_rawsetp(L, -2, L1);  /* set new hook */
   lua_pop(L, 1);  /* remove hook table */
   lua_sethook(L1, func, mask, count);  /* set hooks */
   return 0;
@@ -338,8 +325,7 @@ static int db_gethook (lua_State *L) {
     lua_pushliteral(L, "external hook");
   else {
     gethooktable(L);
-    lua_pushlightuserdata(L, L1);
-    lua_rawget(L, -2);   /* get hook */
+    lua_rawgetp(L, -1, L1);   /* get hook */
     lua_remove(L, -2);  /* remove hook table */
   }
   lua_pushstring(L, unmakemask(mask, buff));

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 2.73 2010/09/07 19:21:39 roberto Exp roberto $
+** $Id: ldebug.c,v 2.87 2011/10/07 20:45:19 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -35,12 +35,12 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
 
 static int currentpc (CallInfo *ci) {
   lua_assert(isLua(ci));
-  return pcRel(ci->u.l.savedpc, ci_func(ci)->l.p);
+  return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
 }
 
 
 static int currentline (CallInfo *ci) {
-  return getfuncline(ci_func(ci)->l.p, currentpc(ci));
+  return getfuncline(ci_func(ci)->p, currentpc(ci));
 }
 
 
@@ -94,13 +94,35 @@ LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
 }
 
 
+static const char *upvalname (Proto *p, int uv) {
+  TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
+  if (s == NULL) return "?";
+  else return getstr(s);
+}
+
+
+static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
+  int nparams = clLvalue(ci->func)->p->numparams;
+  if (n >= ci->u.l.base - ci->func - nparams)
+    return NULL;  /* no such vararg */
+  else {
+    *pos = ci->func + nparams + n;
+    return "(*vararg)";  /* generic name for any vararg */
+  }
+}
+
+
 static const char *findlocal (lua_State *L, CallInfo *ci, int n,
                               StkId *pos) {
   const char *name = NULL;
   StkId base;
   if (isLua(ci)) {
-    base = ci->u.l.base;
-    name = luaF_getlocalname(ci_func(ci)->l.p, n, currentpc(ci));
+    if (n < 0)  /* access to vararg values? */
+      return findvararg(ci, -n, pos);
+    else {
+      base = ci->u.l.base;
+      name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
+    }
   }
   else
     base = ci->func + 1;
@@ -108,10 +130,8 @@ static const char *findlocal (lua_State *L, CallInfo *ci, int n,
     StkId limit = (ci == L->ci) ? L->top : ci->next->func;
     if (limit - base >= n && n > 0)  /* is 'n' inside 'ci' stack? */
       name = "(*temporary)";  /* generic name for any valid slot */
-    else {
-      *pos = base;  /* to avoid warnings */
+    else
       return NULL;  /* no name */
-    }
   }
   *pos = base + (n - 1);
   return name;
@@ -125,10 +145,10 @@ LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
     if (!isLfunction(L->top - 1))  /* not a Lua function? */
       name = NULL;
     else  /* consider live variables at function start (parameters) */
-      name = luaF_getlocalname(clvalue(L->top - 1)->l.p, n, 0);
+      name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
   }
   else {  /* active function; get information through 'ar' */
-    StkId pos;
+    StkId pos = 0;  /* to avoid warnings */
     name = findlocal(L, ar->i_ci, n, &pos);
     if (name) {
       setobj2s(L, L->top, pos);
@@ -141,11 +161,11 @@ 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;
+  StkId pos = 0;  /* to avoid warnings */
   const char *name = findlocal(L, ar->i_ci, n, &pos);
   lua_lock(L);
   if (name)
-      setobjs2s(L, pos, L->top - 1);
+    setobjs2s(L, pos, L->top - 1);
   L->top--;  /* pop value */
   lua_unlock(L);
   return name;
@@ -177,12 +197,14 @@ static void collectvalidlines (lua_State *L, Closure *f) {
   }
   else {
     int i;
+    TValue v;
     int *lineinfo = f->l.p->lineinfo;
-    Table *t = luaH_new(L);
-    sethvalue(L, L->top, t);
+    Table *t = luaH_new(L);  /* new table to store active lines */
+    sethvalue(L, L->top, t);  /* push it on stack */
     incr_top(L);
-    for (i=0; i<f->l.p->sizelineinfo; i++)
-      setbvalue(luaH_setint(L, t, lineinfo[i]), 1);
+    setbvalue(&v, 1);  /* boolean 'true' to be the value of all indices */
+    for (i = 0; i < f->l.p->sizelineinfo; i++)  /* for all lines with code */
+      luaH_setint(L, t, lineinfo[i], &v);  /* table[line] = true */
   }
 }
 
@@ -217,7 +239,11 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
         break;
       }
       case 'n': {
-        ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
+        /* calling function is a known Lua function? */
+        if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
+          ar->namewhat = getfuncname(L, ci->previous, &ar->name);
+        else
+          ar->namewhat = NULL;
         if (ar->namewhat == NULL) {
           ar->namewhat = "";  /* not found */
           ar->name = NULL;
@@ -243,7 +269,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
   if (*what == '>') {
     ci = NULL;
     func = L->top - 1;
-    luai_apicheck(L, ttisfunction(func));
+    api_check(L, ttisfunction(func), "function expected");
     what++;  /* skip the '>' */
     L->top--;  /* pop function */
   }
@@ -271,96 +297,57 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
 ** =======================================================
 */
 
+static const char *getobjname (Proto *p, int lastpc, int reg,
+                               const char **name);
 
-static void kname (Proto *p, int c, int reg, const char *what,
-                   const char **name) {
-  if (c == reg && what && *what == 'c')
-    return;  /* index is a constant; name already correct */
-  else if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
-    *name = svalue(&p->k[INDEXK(c)]);
-  else
-    *name = "?";
+
+/*
+** find a "name" for the RK value 'c'
+*/
+static void kname (Proto *p, int pc, int c, const char **name) {
+  if (ISK(c)) {  /* is 'c' a constant? */
+    TValue *kvalue = &p->k[INDEXK(c)];
+    if (ttisstring(kvalue)) {  /* literal constant? */
+      *name = svalue(kvalue);  /* it is its own name */
+      return;
+    }
+    /* else no reasonable name found */
+  }
+  else {  /* 'c' is a register */
+    const char *what = getobjname(p, pc, c, name); /* search for 'c' */
+    if (what && *what == 'c') {  /* found a constant name? */
+      return;  /* 'name' already filled */
+    }
+    /* else no reasonable name found */
+  }
+  *name = "?";  /* no reasonable name found */
 }
 
 
-static const char *getobjname (lua_State *L, CallInfo *ci, int reg,
-                               const char **name) {
-  Proto *p = ci_func(ci)->l.p;
-  const char *what = NULL;
-  int lastpc = currentpc(ci);
+/*
+** try to find last instruction before 'lastpc' that modified register 'reg'
+*/
+static int findsetreg (Proto *p, int lastpc, int reg) {
   int pc;
-  *name = luaF_getlocalname(p, reg + 1, lastpc);
-  if (*name)  /* is a local? */
-    return "local";
-  /* else try symbolic execution */
+  int setreg = -1;  /* keep last instruction that changed 'reg' */
   for (pc = 0; pc < lastpc; pc++) {
     Instruction i = p->code[pc];
     OpCode op = GET_OPCODE(i);
     int a = GETARG_A(i);
     switch (op) {
-      case OP_MOVE: {
-        if (reg == a) {
-          int b = GETARG_B(i);  /* move from 'b' to 'a' */
-          if (b < a)
-            what = getobjname(L, ci, b, name);  /* get name for 'b' */
-          else what = NULL;
-        }
-        break;
-      }
-      case OP_GETTABUP:
-      case OP_GETTABLE: {
-        if (reg == a) {
-          int k = GETARG_C(i);  /* key index */
-          int t = GETARG_B(i);
-          const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */ 
-                           ? luaF_getlocalname(p, t + 1, pc)
-                           : getstr(p->upvalues[t].name);
-          kname(p, k, a, what, name);
-          what = (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
-        }
-        break;
-      }
-      case OP_GETUPVAL: {
-        if (reg == a) {
-          int u = GETARG_B(i);  /* upvalue index */
-          TString *tn = p->upvalues[u].name;
-          *name = tn ? getstr(tn) : "?";
-          what = "upvalue";
-        }
-        break;
-      }
-      case OP_LOADK: {
-        if (reg == a) {
-          int b = GETARG_Bx(i);
-          b = (b > 0) ? b - 1 : GETARG_Ax(p->code[pc + 1]);
-          if (ttisstring(&p->k[b])) {
-            what = "constant";
-            *name = svalue(&p->k[b]);
-          }
-        }
-        break;
-      }
       case OP_LOADNIL: {
-        int b = GETARG_B(i);  /* move from 'b' to 'a' */
-        if (a <= reg && reg <= b)  /* set registers from 'a' to 'b' */
-          what = NULL;
-        break;
-      }
-      case OP_SELF: {
-        if (reg == a) {
-          int k = GETARG_C(i);  /* key index */
-          kname(p, k, a, what, name);
-          what = "method";
-        }
+        int b = GETARG_B(i);
+        if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
+          setreg = pc;
         break;
       }
       case OP_TFORCALL: {
-        if (reg >= a + 2) what = NULL;  /* affect all regs above its base */
+        if (reg >= a + 2) setreg = pc;  /* affect all regs above its base */
         break;
       }
       case OP_CALL:
       case OP_TAILCALL: {
-        if (reg >= a) what = NULL;  /* affect all registers above base */
+        if (reg >= a) setreg = pc;  /* affect all registers above base */
         break;
       }
       case OP_JMP: {
@@ -371,32 +358,88 @@ static const char *getobjname (lua_State *L, CallInfo *ci, int reg,
           pc += b;  /* do the jump */
         break;
       }
+      case OP_TEST: {
+        if (reg == a) setreg = pc;  /* jumped code can change 'a' */
+        break;
+      }
       default:
-        if (testAMode(op) && reg == a) what = NULL;
+        if (testAMode(op) && reg == a)  /* any instruction that set A */
+          setreg = pc;
         break;
     }
   }
-  return what;
+  return setreg;
+}
+
+
+static const char *getobjname (Proto *p, int lastpc, int reg,
+                               const char **name) {
+  int pc;
+  *name = luaF_getlocalname(p, reg + 1, lastpc);
+  if (*name)  /* is a local? */
+    return "local";
+  /* else try symbolic execution */
+  pc = findsetreg(p, lastpc, reg);
+  if (pc != -1) {  /* could find instruction? */
+    Instruction i = p->code[pc];
+    OpCode op = GET_OPCODE(i);
+    switch (op) {
+      case OP_MOVE: {
+        int b = GETARG_B(i);  /* move from 'b' to 'a' */
+        if (b < GETARG_A(i))
+          return getobjname(p, pc, b, name);  /* get name for 'b' */
+        break;
+      }
+      case OP_GETTABUP:
+      case OP_GETTABLE: {
+        int k = GETARG_C(i);  /* key index */
+        int t = GETARG_B(i);  /* table index */
+        const char *vn = (op == OP_GETTABLE)  /* name of indexed variable */
+                         ? luaF_getlocalname(p, t + 1, pc)
+                         : upvalname(p, t);
+        kname(p, pc, k, name);
+        return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
+      }
+      case OP_GETUPVAL: {
+        *name = upvalname(p, GETARG_B(i));
+        return "upvalue";
+      }
+      case OP_LOADK:
+      case OP_LOADKX: {
+        int b = (op == OP_LOADK) ? GETARG_Bx(i)
+                                 : GETARG_Ax(p->code[pc + 1]);
+        if (ttisstring(&p->k[b])) {
+          *name = svalue(&p->k[b]);
+          return "constant";
+        }
+        break;
+      }
+      case OP_SELF: {
+        int k = GETARG_C(i);  /* key index */
+        kname(p, pc, k, name);
+        return "method";
+      }
+      default: break;  /* go through to return NULL */
+    }
+  }
+  return NULL;  /* could not find reasonable name */
 }
 
 
 static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
   TMS tm;
-  Instruction i;
-  if ((ci->callstatus & CIST_TAIL) || !isLua(ci->previous))
-    return NULL;  /* calling function is not Lua (or is unknown) */
-  ci = ci->previous;  /* calling function */
-  i = ci_func(ci)->l.p->code[currentpc(ci)];
-  if (GET_OPCODE(i) == OP_EXTRAARG)  /* extra argument? */
-    i = ci_func(ci)->l.p->code[currentpc(ci) - 1];  /* get 'real' instruction */
+  Proto *p = ci_func(ci)->p;  /* calling function */
+  int pc = currentpc(ci);  /* calling instruction index */
+  Instruction i = p->code[pc];  /* calling instruction */
   switch (GET_OPCODE(i)) {
     case OP_CALL:
-    case OP_TAILCALL:
-      return getobjname(L, ci, GETARG_A(i), name);
-    case OP_TFORCALL: {
+    case OP_TAILCALL:  /* get function name */
+      return getobjname(p, pc, GETARG_A(i), name);
+    case OP_TFORCALL: {  /* for iterator */
       *name = "for iterator";
        return "for iterator";
     }
+    /* all other instructions can call only through metamethods */
     case OP_SELF:
     case OP_GETTABUP:
     case OP_GETTABLE: tm = TM_INDEX; break;
@@ -425,7 +468,10 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
 
 
 
-/* only ANSI way to check whether a pointer points to an array */
+/*
+** 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) {
   StkId p;
   for (p = ci->u.l.base; p < ci->top; p++)
@@ -435,12 +481,12 @@ static int isinstack (CallInfo *ci, const TValue *o) {
 
 
 static const char *getupvalname (CallInfo *ci, const TValue *o,
-                               const char **name) {
-  LClosure *c = &ci_func(ci)->l;
+                                 const char **name) {
+  LClosure *c = ci_func(ci);
   int i;
   for (i = 0; i < c->nupvalues; i++) {
     if (c->upvals[i]->v == o) {
-      *name = getstr(c->p->upvalues[i].name);
+      *name = upvalname(c->p, i);
       return "upvalue";
     }
   }
@@ -448,15 +494,16 @@ static const char *getupvalname (CallInfo *ci, const TValue *o,
 }
 
 
-void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
+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 */
-    if (!kind && isinstack(ci, o))  /* no? try a register */ 
-      kind = getobjname(L, ci, cast_int(o - ci->u.l.base), &name);
+    if (!kind && isinstack(ci, o))  /* no? try a register */
+      kind = getobjname(ci_func(ci)->p, currentpc(ci),
+                        cast_int(o - ci->u.l.base), &name);
   }
   if (kind)
     luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
@@ -466,14 +513,14 @@ void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
 }
 
 
-void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
   if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
   lua_assert(!ttisstring(p1) && !ttisnumber(p2));
   luaG_typeerror(L, p1, "concatenate");
 }
 
 
-void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *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 */
@@ -481,14 +528,13 @@ void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
 }
 
 
-int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
+l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
   const char *t1 = objtypename(p1);
   const char *t2 = objtypename(p2);
   if (t1 == t2)
     luaG_runerror(L, "attempt to compare two %s values", t1);
   else
     luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
-  return 0;
 }
 
 
@@ -497,7 +543,7 @@ static void addinfo (lua_State *L, const char *msg) {
   if (isLua(ci)) {  /* is Lua code? */
     char buff[LUA_IDSIZE];  /* add file:line information */
     int line = currentline(ci);
-    TString *src = ci_func(ci)->l.p->source;
+    TString *src = ci_func(ci)->p->source;
     if (src)
       luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
     else {  /* no source available; use "?" instead */
@@ -508,7 +554,7 @@ static void addinfo (lua_State *L, const char *msg) {
 }
 
 
-void luaG_errormsg (lua_State *L) {
+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);
@@ -521,7 +567,7 @@ void luaG_errormsg (lua_State *L) {
 }
 
 
-void luaG_runerror (lua_State *L, const char *fmt, ...) {
+l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
   va_list argp;
   va_start(argp, fmt);
   addinfo(L, luaO_pushvfstring(L, fmt, argp));

ldebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.h,v 2.4 2009/04/30 17:42:21 roberto Exp roberto $
+** $Id: ldebug.h,v 2.6 2011/06/02 19:31:40 roberto Exp roberto $
 ** Auxiliary functions from Debug Interface module
 ** See Copyright Notice in lua.h
 */
@@ -17,15 +17,18 @@
 
 #define resethookcount(L)	(L->hookcount = L->basehookcount)
 
+/* Active Lua function (given call info) */
+#define ci_func(ci)		(clLvalue((ci)->func))
 
-LUAI_FUNC void luaG_typeerror (lua_State *L, const TValue *o,
-                                             const char *opname);
-LUAI_FUNC void luaG_concaterror (lua_State *L, StkId p1, StkId p2);
-LUAI_FUNC void luaG_aritherror (lua_State *L, const TValue *p1,
-                                              const TValue *p2);
-LUAI_FUNC int luaG_ordererror (lua_State *L, const TValue *p1,
-                                             const TValue *p2);
-LUAI_FUNC void luaG_runerror (lua_State *L, const char *fmt, ...);
-LUAI_FUNC void luaG_errormsg (lua_State *L);
+
+LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
+                                                const char *opname);
+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 l_noret luaG_errormsg (lua_State *L);
 
 #endif

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 2.89 2010/09/30 17:21:31 roberto Exp roberto $
+** $Id: ldo.c,v 2.101 2011/10/07 20:45:19 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -100,7 +100,7 @@ static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
 }
 
 
-void luaD_throw (lua_State *L, int errcode) {
+l_noret luaD_throw (lua_State *L, int errcode) {
   if (L->errorJmp) {  /* thread has an error handler? */
     L->errorJmp->status = errcode;  /* set status */
     LUAI_THROW(L, L->errorJmp);  /* jump to it */
@@ -123,7 +123,7 @@ void luaD_throw (lua_State *L, int errcode) {
 
 
 int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
-  unsigned short oldnCcalls = G(L)->nCcalls;
+  unsigned short oldnCcalls = L->nCcalls;
   struct lua_longjmp lj;
   lj.status = LUA_OK;
   lj.previous = L->errorJmp;  /* chain new error handler */
@@ -132,7 +132,7 @@ int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
     (*f)(L, ud);
   );
   L->errorJmp = lj.previous;  /* restore old error handler */
-  G(L)->nCcalls = oldnCcalls;
+  L->nCcalls = oldnCcalls;
   return lj.status;
 }
 
@@ -293,65 +293,59 @@ static StkId tryfuncTM (lua_State *L, StkId func) {
 ** returns true if function has been executed (C function)
 */
 int luaD_precall (lua_State *L, StkId func, int nresults) {
-  Closure *cl;
   lua_CFunction f;
-  ptrdiff_t funcr;
-  if (!ttisfunction(func)) /* `func' is not a function? */
-    func = tryfuncTM(L, func);  /* check the `function' tag method */
-  funcr = savestack(L, func);
-  if (ttislcf(func)) {  /* light C function? */
-    f = fvalue(func);  /* get it */
-    goto isCfunc;  /* go to call it */
-  }
-  cl = clvalue(func);
-  if (cl->c.isC) {  /* C closure? */
-    CallInfo *ci;
-    int n;
-    f = cl->c.f;
-  isCfunc:  /* call C function 'f' */
-    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
-    ci = next_ci(L);  /* now 'enter' new function */
-    ci->nresults = nresults;
-    ci->func = restorestack(L, funcr);
-    ci->top = L->top + LUA_MINSTACK;
-    lua_assert(ci->top <= L->stack_last);
-    ci->callstatus = 0;
-    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, L->top - n);
-    return 1;
-  }
-  else {  /* Lua function: prepare its call */
-    CallInfo *ci;
-    int nparams, nargs;
-    StkId base;
-    Proto *p = cl->l.p;
-    luaD_checkstack(L, p->maxstacksize);
-    func = restorestack(L, funcr);
-    nargs = cast_int(L->top - func) - 1;  /* number of real arguments */
-    nparams = p->numparams;  /* number of expected parameters */
-    for (; nargs < nparams; nargs++)
-      setnilvalue(L->top++);  /* complete missing arguments */
-    if (!p->is_vararg)  /* no varargs? */
-      base = func + 1;
-    else  /* vararg function */
-      base = adjust_varargs(L, p, nargs);
-    ci = next_ci(L);  /* now 'enter' new function */
-    ci->nresults = nresults;
-    ci->func = func;
-    ci->u.l.base = base;
-    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;
-    if (L->hookmask & LUA_MASKCALL)
-      callhook(L, ci);
-    return 0;
+  CallInfo *ci;
+  int n;  /* number of arguments (Lua) or returns (C) */
+  ptrdiff_t funcr = savestack(L, func);
+  switch (ttype(func)) {
+    case LUA_TLCF:  /* light C function */
+      f = fvalue(func);
+      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 = restorestack(L, funcr);
+      ci->top = L->top + LUA_MINSTACK;
+      lua_assert(ci->top <= L->stack_last);
+      ci->callstatus = 0;
+      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, L->top - n);
+      return 1;
+    }
+    case LUA_TLCL: {  /* Lua function: prepare its call */
+      StkId base;
+      Proto *p = clLvalue(func)->p;
+      luaD_checkstack(L, p->maxstacksize);
+      func = restorestack(L, funcr);
+      n = cast_int(L->top - func) - 1;  /* number of real arguments */
+      for (; n < p->numparams; n++)
+        setnilvalue(L->top++);  /* complete missing arguments */
+      base = (!p->is_vararg) ? func + 1 : adjust_varargs(L, p, n);
+      ci = next_ci(L);  /* now 'enter' new function */
+      ci->nresults = nresults;
+      ci->func = func;
+      ci->u.l.base = base;
+      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;
+      if (L->hookmask & LUA_MASKCALL)
+        callhook(L, ci);
+      return 0;
+    }
+    default: {  /* not a function */
+      func = tryfuncTM(L, func);  /* retry with 'function' tag method */
+      return luaD_precall(L, func, nresults);  /* now it must be a function */
+    }
   }
 }
 
@@ -388,18 +382,17 @@ int luaD_poscall (lua_State *L, StkId firstResult) {
 ** function position.
 */
 void luaD_call (lua_State *L, StkId func, int nResults, int allowyield) {
-  global_State *g = G(L);
-  if (++g->nCcalls >= LUAI_MAXCCALLS) {
-    if (g->nCcalls == LUAI_MAXCCALLS)
+  if (++L->nCcalls >= LUAI_MAXCCALLS) {
+    if (L->nCcalls == LUAI_MAXCCALLS)
       luaG_runerror(L, "C stack overflow");
-    else if (g->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
+    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--;
-  g->nCcalls--;
+  L->nCcalls--;
   luaC_checkGC(L);
 }
 
@@ -410,7 +403,7 @@ static void finishCcall (lua_State *L) {
   lua_assert(ci->u.c.k != NULL);  /* must have a continuation */
   lua_assert(L->nny == 0);
   /* finish 'luaD_call' */
-  G(L)->nCcalls--;
+  L->nCcalls--;
   /* finish 'lua_callk' */
   adjustresults(L, ci->nresults);
   /* call continuation function */
@@ -479,7 +472,7 @@ static int recover (lua_State *L, int status) {
 ** coroutine itself. (Such errors should not be handled by any coroutine
 ** error handler and should not kill the coroutine.)
 */
-static void resume_error (lua_State *L, const char *msg, StkId firstArg) {
+static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
   L->top = firstArg;  /* remove args from the stack */
   setsvalue2s(L, L->top, luaS_new(L, msg));  /* push error message */
   incr_top(L);
@@ -493,7 +486,7 @@ static void resume_error (lua_State *L, const char *msg, StkId firstArg) {
 static void resume (lua_State *L, void *ud) {
   StkId firstArg = cast(StkId, ud);
   CallInfo *ci = L->ci;
-  if (G(L)->nCcalls >= LUAI_MAXCCALLS)
+  if (L->nCcalls >= LUAI_MAXCCALLS)
     resume_error(L, "C stack overflow", firstArg);
   if (L->status == LUA_OK) {  /* may be starting a coroutine */
     if (ci != &L->base_ci)  /* not in base level? */
@@ -520,7 +513,7 @@ static void resume (lua_State *L, void *ud) {
         api_checknelems(L, n);
         firstArg = L->top - n;  /* yield results come from continuation */
       }
-      G(L)->nCcalls--;  /* finish 'luaD_call' */
+      L->nCcalls--;  /* finish 'luaD_call' */
       luaD_poscall(L, firstArg);  /* finish 'luaD_precall' */
     }
     unroll(L, NULL);
@@ -528,11 +521,11 @@ static void resume (lua_State *L, void *ud) {
 }
 
 
-LUA_API int lua_resume (lua_State *L, int nargs) {
+LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
   int status;
   lua_lock(L);
   luai_userstateresume(L, nargs);
-  ++G(L)->nCcalls;  /* count resume */
+  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, L->top - nargs);
@@ -552,7 +545,8 @@ LUA_API int lua_resume (lua_State *L, int nargs) {
     lua_assert(status == L->status);
   }
   L->nny = 1;  /* do not allow yields */
-  --G(L)->nCcalls;
+  L->nCcalls--;
+  lua_assert(L->nCcalls == ((from) ? from->nCcalls : 0));
   lua_unlock(L);
   return status;
 }
@@ -615,39 +609,60 @@ int luaD_pcall (lua_State *L, Pfunc func, void *u,
 */
 struct SParser {  /* data to `f_parser' */
   ZIO *z;
-  Mbuffer buff;  /* buffer to be used by the scanner */
-  Varlist varl;  /* list of local variables (to be used by the parser) */
+  Mbuffer buff;  /* dynamic structure used by the scanner */
+  Dyndata dyd;  /* dynamic structures used by the parser */
+  const char *mode;
   const char *name;
 };
 
+
+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 " LUA_QS ")", x, mode);
+    luaD_throw(L, LUA_ERRSYNTAX);
+  }
+}
+
+
 static void f_parser (lua_State *L, void *ud) {
   int i;
   Proto *tf;
   Closure *cl;
   struct SParser *p = cast(struct SParser *, ud);
-  int c = luaZ_lookahead(p->z);
-  tf = (c == LUA_SIGNATURE[0])
-           ? luaU_undump(L, p->z, &p->buff, p->name)
-           : luaY_parser(L, p->z, &p->buff, &p->varl, p->name);
+  int c = zgetc(p->z);  /* read first character */
+  if (c == LUA_SIGNATURE[0]) {
+    checkmode(L, p->mode, "binary");
+    tf = luaU_undump(L, p->z, &p->buff, p->name);
+  }
+  else {
+    checkmode(L, p->mode, "text");
+    tf = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c);
+  }
   setptvalue2s(L, L->top, tf);
   incr_top(L);
   cl = luaF_newLclosure(L, tf);
-  setclvalue(L, L->top - 1, cl);
+  setclLvalue(L, L->top - 1, cl);
   for (i = 0; i < tf->sizeupvalues; i++)  /* initialize upvalues */
     cl->l.upvals[i] = luaF_newupval(L);
 }
 
 
-int luaD_protectedparser (lua_State *L, ZIO *z, const char *name) {
+int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
+                                        const char *mode) {
   struct SParser p;
   int status;
   L->nny++;  /* cannot yield during parsing */
-  p.z = z; p.name = name;
-  p.varl.actvar = NULL; p.varl.nactvar = p.varl.actvarsize = 0;
+  p.z = z; p.name = name; p.mode = mode;
+  p.dyd.actvar.arr = NULL; p.dyd.actvar.size = 0;
+  p.dyd.gt.arr = NULL; p.dyd.gt.size = 0;
+  p.dyd.label.arr = NULL; p.dyd.label.size = 0;
   luaZ_initbuffer(L, &p.buff);
   status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc);
   luaZ_freebuffer(L, &p.buff);
-  luaM_freearray(L, p.varl.actvar, p.varl.actvarsize);
+  luaM_freearray(L, p.dyd.actvar.arr, p.dyd.actvar.size);
+  luaM_freearray(L, p.dyd.gt.arr, p.dyd.gt.size);
+  luaM_freearray(L, p.dyd.label.arr, p.dyd.label.size);
   L->nny--;
   return status;
 }

ldo.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.h,v 2.17 2009/11/25 15:27:51 roberto Exp roberto $
+** $Id: ldo.h,v 2.19 2011/10/07 20:45:19 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -26,7 +26,8 @@
 /* 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);
+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,
@@ -38,7 +39,7 @@ 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_throw (lua_State *L, int errcode);
+LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
 LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
 
 #endif

ldump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldump.c,v 1.17 2010/10/13 21:04:52 lhf Exp $
+** $Id: ldump.c,v 1.19 2011/11/23 17:48:18 lhf Exp $
 ** save precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -69,7 +69,7 @@ static void DumpString(const TString* s, DumpState* D)
  {
   size_t size=s->tsv.len+1;		/* include trailing '\0' */
   DumpVar(size,D);
-  DumpBlock(getstr(s),size,D);
+  DumpBlock(getstr(s),size*sizeof(char),D);
  }
 }
 
@@ -111,8 +111,8 @@ static void DumpUpvalues(const Proto* f, DumpState* D)
  DumpInt(n,D);
  for (i=0; i<n; i++)
  {
-  DumpChar(f->upvalues[i].instack, D);
-  DumpChar(f->upvalues[i].idx, D);
+  DumpChar(f->upvalues[i].instack,D);
+  DumpChar(f->upvalues[i].idx,D);
  }
 }
 
@@ -150,7 +150,7 @@ static void DumpFunction(const Proto* f, DumpState* D)
 
 static void DumpHeader(DumpState* D)
 {
- char h[LUAC_HEADERSIZE];
+ lu_byte h[LUAC_HEADERSIZE];
  luaU_header(h);
  DumpBlock(h,LUAC_HEADERSIZE,D);
 }

lgc.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.c,v 2.102 2010/09/03 14:14:01 roberto Exp roberto $
+** $Id: lgc.c,v 2.115 2011/11/28 17:25:48 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -51,7 +51,7 @@
 ** standard negative debt for GC; a reasonable "time" to wait before
 ** starting a new cycle
 */
-#define stddebt(g)	(-cast(l_mem, g->totalbytes/100) * g->gcpause)
+#define stddebt(g)	(-cast(l_mem, gettotalbytes(g)/100) * g->gcpause)
 
 
 /*
@@ -68,11 +68,15 @@
 #define stringmark(s)	((void)((s) && resetbits((s)->tsv.marked, WHITEBITS)))
 
 
-#define isfinalized(u)		testbit((u)->marked, FINALIZEDBIT)
+#define isfinalized(x)		testbit(gch(x)->marked, FINALIZEDBIT)
 
 #define checkdeadkey(n)	lua_assert(!ttisdeadkey(gkey(n)) || ttisnil(gval(n)))
 
 
+#define checkconsistency(obj)  \
+  lua_longassert(!iscollectable(obj) || righttt(obj))
+
+
 #define markvalue(g,o) { checkconsistency(o); \
   if (valiswhite(o)) reallymarkobject(g,gcvalue(o)); }
 
@@ -89,6 +93,12 @@ static void reallymarkobject (global_State *g, GCObject *o);
 */
 
 
+/*
+** one after last element in a hash array
+*/
+#define gnodelast(h)	gnode(h, cast(size_t, sizenode(h)))
+
+
 /*
 ** link table 'h' into list pointed by 'p'
 */
@@ -96,12 +106,13 @@ static void reallymarkobject (global_State *g, GCObject *o);
 
 
 /*
-** mark a table entry as dead (therefore removing it from the table)
+** if key is not marked, mark its entry as dead (therefore removing it
+** from the table)
 */
 static void removeentry (Node *n) {
   lua_assert(ttisnil(gval(n)));
-  if (iscollectable(gkey(n)))
-    setdeadvalue(gkey(n));  /* dead key; remove it */
+  if (valiswhite(gkey(n)))
+    setdeadvalue(gkey(n));  /* unused and unmarked key; remove it */
 }
 
 
@@ -112,14 +123,13 @@ static void removeentry (Node *n) {
 ** other objects: if really collected, cannot keep them; for objects
 ** being finalized, keep them in keys, but not in values
 */
-static int iscleared (const TValue *o, int iskey) {
+static int iscleared (const TValue *o) {
   if (!iscollectable(o)) return 0;
-  if (ttisstring(o)) {
+  else if (ttisstring(o)) {
     stringmark(rawtsvalue(o));  /* strings are `values', so are never weak */
     return 0;
   }
-  return iswhite(gcvalue(o)) ||
-    (ttisuserdata(o) && (!iskey && isfinalized(uvalue(o))));
+  else return iswhite(gcvalue(o));
 }
 
 
@@ -149,7 +159,7 @@ void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v) {
 */
 void luaC_barrierback_ (lua_State *L, GCObject *o) {
   global_State *g = G(L);
-  lua_assert(isblack(o) && !isdead(g, o));
+  lua_assert(isblack(o) && !isdead(g, o) && gch(o)->tt == LUA_TTABLE);
   black2gray(o);  /* make object gray (again) */
   gco2t(o)->gclist = g->grayagain;
   g->grayagain = o;
@@ -281,7 +291,7 @@ static void reallymarkobject (global_State *g, GCObject *o) {
 
 
 /*
-** mark tag methods for basic types
+** mark metamethods for basic types
 */
 static void markmt (global_State *g) {
   int i;
@@ -319,8 +329,7 @@ static void remarkupvals (global_State *g) {
 ** mark root set and reset all gray lists, to start a new
 ** incremental (or full) collection
 */
-static void markroot (lua_State *L) {
-  global_State *g = G(L);
+static void markroot (global_State *g) {
   g->gray = g->grayagain = NULL;
   g->weak = g->allweak = g->ephemeron = NULL;
   markobject(g, g->mainthread);
@@ -339,7 +348,10 @@ static void markroot (lua_State *L) {
 */
 
 static void traverseweakvalue (global_State *g, Table *h) {
-  Node *n, *limit = gnode(h, sizenode(h));
+  Node *n, *limit = gnodelast(h);
+  /* if there is array part, assume it may have white values (do not
+     traverse it just to check) */
+  int hasclears = (h->sizearray > 0);
   for (n = gnode(h, 0); n < limit; n++) {
     checkdeadkey(n);
     if (ttisnil(gval(n)))  /* entry is empty? */
@@ -347,16 +359,22 @@ static void traverseweakvalue (global_State *g, Table *h) {
     else {
       lua_assert(!ttisnil(gkey(n)));
       markvalue(g, gkey(n));  /* mark key */
+      if (!hasclears && iscleared(gval(n)))  /* is there a white value? */
+        hasclears = 1;  /* table will have to be cleared */
     }
   }
-  linktable(h, &g->weak);  /* link into appropriate list */
+  if (hasclears)
+    linktable(h, &g->weak);  /* has to be cleared later */
+  else  /* no white values */
+    linktable(h, &g->grayagain);  /* no need to clean */
 }
 
 
 static int traverseephemeron (global_State *g, Table *h) {
   int marked = 0;  /* true if an object is marked in this traversal */
-  int hasclears = 0;  /* true if table has unmarked pairs */
-  Node *n, *limit = gnode(h, sizenode(h));
+  int hasclears = 0;  /* true if table has white keys */
+  int prop = 0;  /* true if table has entry "white-key -> white-value" */
+  Node *n, *limit = gnodelast(h);
   int i;
   /* traverse array part (numeric keys are 'strong') */
   for (i = 0; i < h->sizearray; i++) {
@@ -370,25 +388,28 @@ static int traverseephemeron (global_State *g, Table *h) {
     checkdeadkey(n);
     if (ttisnil(gval(n)))  /* entry is empty? */
       removeentry(n);  /* remove it */
+    else if (iscleared(gkey(n))) {  /* key is not marked (yet)? */
+      hasclears = 1;  /* table must be cleared */
+      if (valiswhite(gval(n)))  /* value not marked yet? */
+        prop = 1;  /* must propagate again */
+    }
     else if (valiswhite(gval(n))) {  /* value not marked yet? */
-      if (iscleared(gkey(n), 1))  /* key is not marked (yet)? */
-        hasclears = 1;  /* may have to propagate mark from key to value */
-      else {  /* key is marked, so mark value */
-        marked = 1;  /* value was not marked */
-        reallymarkobject(g, gcvalue(gval(n)));
-      }
+      marked = 1;
+      reallymarkobject(g, gcvalue(gval(n)));  /* mark it now */
     }
   }
-  if (hasclears)  /* does table have unmarked pairs? */
-    linktable(h, &g->ephemeron);  /* will have to propagate again */
-  else  /* nothing to propagate */
-    linktable(h, &g->weak);  /* avoid convergence phase  */
+  if (prop)
+    linktable(h, &g->ephemeron);  /* have to propagate again */
+  else if (hasclears)  /* does table have white keys? */
+    linktable(h, &g->allweak);  /* may have to clean white keys */
+  else  /* no white keys */
+    linktable(h, &g->grayagain);  /* no need to clean */
   return marked;
 }
 
 
 static void traversestrongtable (global_State *g, Table *h) {
-  Node *n, *limit = gnode(h, sizenode(h));
+  Node *n, *limit = gnodelast(h);
   int i;
   for (i = 0; i < h->sizearray; i++)  /* traverse array part */
     markvalue(g, &h->array[i]);
@@ -524,11 +545,26 @@ static void propagateall (global_State *g) {
 }
 
 
-static void traverselistofgrays (global_State *g, GCObject **l) {
+static void propagatelist (global_State *g, GCObject *l) {
   lua_assert(g->gray == NULL);  /* no grays left */
-  g->gray = *l;  /* now 'l' is new gray list */
-  *l = NULL;
-  propagateall(g);
+  g->gray = l;
+  propagateall(g);  /* traverse all elements from 'l' */
+}
+
+/*
+** retraverse all gray lists. Because tables may be reinserted in other
+** lists when traversed, traverse the original lists to avoid traversing
+** twice the same table (which is not wrong, but inefficient)
+*/
+static void retraversegrays (global_State *g) {
+  GCObject *weak = g->weak;  /* save original lists */
+  GCObject *grayagain = g->grayagain;
+  GCObject *ephemeron = g->ephemeron;
+  g->weak = g->grayagain = g->ephemeron = NULL;
+  propagateall(g);  /* traverse main gray list */
+  propagatelist(g, grayagain);
+  propagatelist(g, weak);
+  propagatelist(g, ephemeron);
 }
 
 
@@ -560,21 +596,39 @@ static void convergeephemerons (global_State *g) {
 
 
 /*
-** clear collected entries from all weaktables in list 'l'
+** clear entries with unmarked keys from all weaktables in list 'l' up
+** to element 'f'
 */
-static void cleartable (GCObject *l) {
-  for (; l != NULL; l = gco2t(l)->gclist) {
+static void clearkeys (GCObject *l, GCObject *f) {
+  for (; l != f; l = gco2t(l)->gclist) {
     Table *h = gco2t(l);
-    Node *n, *limit = gnode(h, sizenode(h));
+    Node *n, *limit = gnodelast(h);
+    for (n = gnode(h, 0); n < limit; n++) {
+      if (!ttisnil(gval(n)) && (iscleared(gkey(n)))) {
+        setnilvalue(gval(n));  /* remove value ... */
+        removeentry(n);  /* and remove entry from table */
+      }
+    }
+  }
+}
+
+
+/*
+** clear entries with unmarked values from all weaktables in list 'l' up
+** to element 'f'
+*/
+static void clearvalues (GCObject *l, GCObject *f) {
+  for (; l != f; l = gco2t(l)->gclist) {
+    Table *h = gco2t(l);
+    Node *n, *limit = gnodelast(h);
     int i;
     for (i = 0; i < h->sizearray; i++) {
       TValue *o = &h->array[i];
-      if (iscleared(o, 0))  /* value was collected? */
+      if (iscleared(o))  /* value was collected? */
         setnilvalue(o);  /* remove value */
     }
     for (n = gnode(h, 0); n < limit; n++) {
-      if (!ttisnil(gval(n)) &&  /* non-empty entry? */
-          (iscleared(gkey(n), 1) || iscleared(gval(n), 0))) {
+      if (!ttisnil(gval(n)) && iscleared(gval(n))) {
         setnilvalue(gval(n));  /* remove value ... */
         removeentry(n);  /* and remove entry from table */
       }
@@ -635,6 +689,7 @@ static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) {
   int ow = otherwhite(g);
   int toclear, toset;  /* bits to clear and to set in all live objects */
   int tostop;  /* stop sweep when this is true */
+  l_mem debt = g->GCdebt;  /* current debt */
   if (isgenerational(g)) {  /* generational mode? */
     toclear = ~0;  /* clear nothing */
     toset = bitmask(OLDBIT);  /* set the old bit of all surviving objects */
@@ -657,13 +712,15 @@ static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) {
         sweepthread(L, gco2th(curr));  /* sweep thread's upvalues */
       if (testbits(marked, tostop)) {
         static GCObject *nullp = NULL;
-        return &nullp;  /* stop sweeping this list */
+        p = &nullp;  /* stop sweeping this list */
+        break;
       }
       /* update marks */
       gch(curr)->marked = cast_byte((marked & toclear) | toset);
       p = &gch(curr)->next;  /* go to next element */
     }
   }
+  luaE_setdebt(g, debt);  /* sweeping should not change debt */
   return p;
 }
 
@@ -687,19 +744,17 @@ static void checkSizes (lua_State *L) {
 }
 
 
-static Udata *udata2finalize (global_State *g) {
+static GCObject *udata2finalize (global_State *g) {
   GCObject *o = g->tobefnz;  /* get first element */
-  Udata *u = rawgco2u(o);
-  lua_assert(isfinalized(&u->uv));
-  lua_assert(!isold(o));
-  g->tobefnz = u->uv.next;  /* remove it from 'tobefnz' list */
-  u->uv.next = g->allgc;  /* return it to 'allgc' list */
+  lua_assert(isfinalized(o));
+  g->tobefnz = gch(o)->next;  /* remove it from 'tobefnz' list */
+  gch(o)->next = g->allgc;  /* return it to 'allgc' list */
   g->allgc = o;
-  resetbit(u->uv.marked, SEPARATED);  /* mark that it is not in 'tobefnz' */
-  resetoldbit(o); /* see MOVE OLD rule */
+  resetbit(gch(o)->marked, SEPARATED);  /* mark that it is not in 'tobefnz' */
+  lua_assert(!isold(o));  /* see MOVE OLD rule */
   if (!keepinvariant(g))  /* not keeping invariant? */
     makewhite(g, o);  /* "sweep" object */
-  return u;
+  return o;
 }
 
 
@@ -711,23 +766,25 @@ static void dothecall (lua_State *L, void *ud) {
 
 static void GCTM (lua_State *L, int propagateerrors) {
   global_State *g = G(L);
-  Udata *udata = udata2finalize(g);
-  const TValue *tm = gfasttm(g, udata->uv.metatable, TM_GC);
+  const TValue *tm;
+  TValue v;
+  setgcovalue(L, &v, udata2finalize(g));
+  tm = luaT_gettmbyobj(L, &v, TM_GC);
   if (tm != NULL && ttisfunction(tm)) {  /* is there a finalizer? */
     int status;
     lu_byte oldah = L->allowhook;
-    lu_mem oldd = g->GCdebt;
-    L->allowhook = 0;  /* stop debug hooks during GC tag method */
-    stopgc(g);  /* avoid GC steps */
+    int running  = g->gcrunning;
+    L->allowhook = 0;  /* stop debug hooks during GC metamethod */
+    g->gcrunning = 0;  /* avoid GC steps */
     setobj2s(L, L->top, tm);  /* push finalizer... */
-    setuvalue(L, L->top+1, udata);  /* ... and its argument */
+    setobj2s(L, L->top + 1, &v);  /* ... and its argument */
     L->top += 2;  /* and (next line) call the finalizer */
     status = luaD_pcall(L, dothecall, NULL, savestack(L, L->top - 2), 0);
     L->allowhook = oldah;  /* restore hooks */
-    g->GCdebt = oldd;  /* restore threshold */
+    g->gcrunning = running;  /* restore state */
     if (status != LUA_OK && propagateerrors) {  /* error while running __gc? */
       if (status == LUA_ERRRUN) {  /* is there an error msg.? */
-        luaO_pushfstring(L, "error in __gc tag method (%s)",
+        luaO_pushfstring(L, "error in __gc metamethod (%s)",
                                         lua_tostring(L, -1));
         status = LUA_ERRGCMM;  /* error in __gc metamethod */
       }
@@ -738,25 +795,25 @@ static void GCTM (lua_State *L, int propagateerrors) {
 
 
 /*
-** move all unreachable udata that need finalization from list 'udgc' to
-** list 'tobefnz'
+** move all unreachable objects (or 'all' objects) that need
+** finalization from list 'finobj' to list 'tobefnz' (to be finalized)
 */
-void luaC_separateudata (lua_State *L, int all) {
+static void separatetobefnz (lua_State *L, int all) {
   global_State *g = G(L);
-  GCObject **p = &g->udgc;
+  GCObject **p = &g->finobj;
   GCObject *curr;
   GCObject **lastnext = &g->tobefnz;
   /* find last 'next' field in 'tobefnz' list (to add elements in its end) */
   while (*lastnext != NULL)
     lastnext = &gch(*lastnext)->next;
   while ((curr = *p) != NULL) {  /* traverse all finalizable objects */
-    lua_assert(gch(curr)->tt == LUA_TUSERDATA && !isfinalized(gco2u(curr)));
+    lua_assert(!isfinalized(curr));
     lua_assert(testbit(gch(curr)->marked, SEPARATED));
     if (!(all || iswhite(curr)))  /* not being collected? */
       p = &gch(curr)->next;  /* don't bother with it */
     else {
       l_setbit(gch(curr)->marked, FINALIZEDBIT); /* won't be finalized again */
-      *p = gch(curr)->next;  /* remove 'curr' from 'udgc' list */
+      *p = gch(curr)->next;  /* remove 'curr' from 'finobj' list */
       gch(curr)->next = *lastnext;  /* link at the end of 'tobefnz' list */
       *lastnext = curr;
       lastnext = &gch(curr)->next;
@@ -766,23 +823,23 @@ void luaC_separateudata (lua_State *L, int all) {
 
 
 /*
-** if userdata 'u' has a finalizer, remove it from 'allgc' list (must
-** search the list to find it) and link it in 'udgc' list.
+** if object 'o' has a finalizer, remove it from 'allgc' list (must
+** search the list to find it) and link it in 'finobj' list.
 */
-void luaC_checkfinalizer (lua_State *L, Udata *u) {
+void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt) {
   global_State *g = G(L);
-  if (testbit(u->uv.marked, SEPARATED) || /* udata is already separated... */
-      isfinalized(&u->uv) ||                     /* ... or is finalized... */
-      gfasttm(g, u->uv.metatable, TM_GC) == NULL)  /* or has no finalizer? */
+  if (testbit(gch(o)->marked, SEPARATED) || /* obj. is already separated... */
+      isfinalized(o) ||                           /* ... or is finalized... */
+      gfasttm(g, mt, TM_GC) == NULL)                /* or has no finalizer? */
     return;  /* nothing to be done */
-  else {  /* move 'u' to 'udgc' list */
+  else {  /* move 'o' to 'finobj' list */
     GCObject **p;
-    for (p = &g->allgc; *p != obj2gco(u); p = &gch(*p)->next) ;
-    *p = u->uv.next;  /* remove 'u' from root list */
-    u->uv.next = g->udgc;  /* link it in list 'udgc' */
-    g->udgc = obj2gco(u);
-    l_setbit(u->uv.marked, SEPARATED);  /* mark it as such */
-    resetoldbit(obj2gco(u));  /* see MOVE OLD rule */
+    for (p = &g->allgc; *p != o; p = &gch(*p)->next) ;
+    *p = gch(o)->next;  /* remove 'o' from root list */
+    gch(o)->next = g->finobj;  /* link it in list 'finobj' */
+    g->finobj = o;
+    l_setbit(gch(o)->marked, SEPARATED);  /* mark it as such */
+    resetoldbit(o);  /* see MOVE OLD rule */
   }
 }
 
@@ -808,7 +865,7 @@ void luaC_changemode (lua_State *L, int mode) {
   if (mode == KGC_GEN) {  /* change to generational mode */
     /* make sure gray lists are consistent */
     luaC_runtilstate(L, bitmask(GCSpropagate));
-    g->lastmajormem = g->totalbytes;
+    g->lastmajormem = gettotalbytes(g);
     g->gckind = KGC_GEN;
   }
   else {  /* change to incremental mode */
@@ -823,24 +880,27 @@ void luaC_changemode (lua_State *L, int mode) {
 
 
 /*
-** call all pending finalizers */
+** call all pending finalizers
+*/
 static void callallpendingfinalizers (lua_State *L, int propagateerrors) {
   global_State *g = G(L);
-  while (g->tobefnz) GCTM(L, propagateerrors);
+  while (g->tobefnz) {
+    resetoldbit(g->tobefnz);
+    GCTM(L, propagateerrors);
+  }
 }
 
 
 void luaC_freeallobjects (lua_State *L) {
   global_State *g = G(L);
   int i;
+  separatetobefnz(L, 1);  /* separate all objects with finalizers */
+  lua_assert(g->finobj == NULL);
   callallpendingfinalizers(L, 0);
-  /* following "white" makes all objects look dead */
-  g->currentwhite = WHITEBITS;
+  g->currentwhite = WHITEBITS; /* this "white" makes all objects look dead */
   g->gckind = KGC_NORMAL;
-  sweepwholelist(L, &g->udgc);
-  lua_assert(g->udgc == NULL);
+  sweepwholelist(L, &g->finobj);  /* finalizers can create objs. in 'finobj' */
   sweepwholelist(L, &g->allgc);
-  lua_assert(g->allgc == NULL);
   for (i = 0; i < g->strt.size; i++)  /* free all string lists */
     sweepwholelist(L, &g->strt.hash[i]);
   lua_assert(g->strt.nuse == 0);
@@ -849,6 +909,7 @@ void luaC_freeallobjects (lua_State *L) {
 
 static void atomic (lua_State *L) {
   global_State *g = G(L);
+  GCObject *origweak, *origall;
   lua_assert(!iswhite(obj2gco(g->mainthread)));
   markobject(g, L);  /* mark running thread */
   /* registry and global metatables may be changed by API */
@@ -857,20 +918,24 @@ static void atomic (lua_State *L) {
   /* remark occasional upvalues of (maybe) dead threads */
   remarkupvals(g);
   /* traverse objects caught by write barrier and by 'remarkupvals' */
-  propagateall(g);
-  traverselistofgrays(g, &g->weak);  /* remark weak tables */
-  traverselistofgrays(g, &g->ephemeron);  /* remark ephemeron tables */
-  traverselistofgrays(g, &g->grayagain);  /* remark gray again */
+  retraversegrays(g);
   convergeephemerons(g);
   /* at this point, all strongly accessible objects are marked. */
-  luaC_separateudata(L, 0);  /* separate userdata to be finalized */
+  /* clear values from weak tables, before checking finalizers */
+  clearvalues(g->weak, NULL);
+  clearvalues(g->allweak, NULL);
+  origweak = g->weak; origall = g->allweak;
+  separatetobefnz(L, 0);  /* separate objects to be finalized */
   markbeingfnz(g);  /* mark userdata that will be finalized */
   propagateall(g);  /* remark, to propagate `preserveness' */
   convergeephemerons(g);
-  /* remove collected objects from weak tables */
-  cleartable(g->weak);
-  cleartable(g->ephemeron);
-  cleartable(g->allweak);
+  /* at this point, all resurrected objects are marked. */
+  /* remove dead objects from weak tables */
+  clearkeys(g->ephemeron, NULL);  /* clear keys from all ephemeron tables */
+  clearkeys(g->allweak, NULL);  /* clear keys from all allweak tables */
+  /* clear values from resurrected weak tables */
+  clearvalues(g->weak, origweak);
+  clearvalues(g->allweak, origall);
   g->sweepstrgc = 0;  /* prepare to sweep strings */
   g->gcstate = GCSsweepstring;
   g->currentwhite = cast_byte(otherwhite(g));  /* flip current white */
@@ -883,7 +948,7 @@ static l_mem singlestep (lua_State *L) {
   switch (g->gcstate) {
     case GCSpause: {
       if (!isgenerational(g))
-        markroot(L);  /* start a new collection */
+        markroot(g);  /* start a new collection */
       /* in any case, root must be marked */
       lua_assert(!iswhite(obj2gco(g->mainthread))
               && !iswhite(gcvalue(&g->l_registry)));
@@ -905,7 +970,7 @@ static l_mem singlestep (lua_State *L) {
         return GCSWEEPCOST;
       }
       else {  /* no more strings to sweep */
-        g->sweepgc = &g->udgc;  /* prepare to sweep userdata */
+        g->sweepgc = &g->finobj;  /* prepare to sweep finalizable objects */
         g->gcstate = GCSsweepudata;
         return 0;
       }
@@ -955,15 +1020,15 @@ static void generationalcollection (lua_State *L) {
   global_State *g = G(L);
   if (g->lastmajormem == 0) {  /* signal for another major collection? */
     luaC_fullgc(L, 0);  /* perform a full regular collection */
-    g->lastmajormem = g->totalbytes;  /* update control */
+    g->lastmajormem = gettotalbytes(g);  /* update control */
   }
   else {
     luaC_runtilstate(L, ~bitmask(GCSpause));  /* run complete cycle */
     luaC_runtilstate(L, bitmask(GCSpause));
-    if (g->totalbytes > g->lastmajormem/100 * g->gcmajorinc)
+    if (gettotalbytes(g) > g->lastmajormem/100 * g->gcmajorinc)
       g->lastmajormem = 0;  /* signal for a major collection */
   }
-  g->GCdebt = stddebt(g);
+  luaE_setdebt(g, stddebt(g));
 }
 
 
@@ -974,21 +1039,33 @@ static void step (lua_State *L) {
     lim -= singlestep(L);
   } while (lim > 0 && g->gcstate != GCSpause);
   if (g->gcstate != GCSpause)
-    g->GCdebt -= GCSTEPSIZE;
+    luaE_setdebt(g, g->GCdebt - GCSTEPSIZE);
   else
-    g->GCdebt = stddebt(g);
+    luaE_setdebt(g, stddebt(g));
 }
 
 
-void luaC_step (lua_State *L) {
+/*
+** performs a basic GC step even if the collector is stopped
+*/
+void luaC_forcestep (lua_State *L) {
+  global_State *g = G(L);
   int i;
-  if (isgenerational(G(L))) generationalcollection(L);
+  if (isgenerational(g)) generationalcollection(L);
   else step(L);
-  for (i = 0; i < GCFINALIZENUM && G(L)->tobefnz; i++)
+  for (i = 0; i < GCFINALIZENUM && g->tobefnz; i++)
     GCTM(L, 1);  /* Call a few pending finalizers */
 }
 
 
+/*
+** performs a basic GC step only if collector is running
+*/
+void luaC_step (lua_State *L) {
+  if (G(L)->gcrunning) luaC_forcestep(L);
+}
+
+
 /*
 ** performs a full GC cycle; if "isemergency", does not call
 ** finalizers (which could change stack positions)
@@ -1016,7 +1093,7 @@ void luaC_fullgc (lua_State *L, int isemergency) {
     luaC_runtilstate(L, bitmask(GCSpropagate));
   }
   g->gckind = origkind;
-  g->GCdebt = stddebt(g);
+  luaE_setdebt(g, stddebt(g));
   if (!isemergency)   /* do not run finalizers during emergency GC */
     callallpendingfinalizers(L, 1);
 }

lgc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.h,v 2.43 2010/06/07 16:55:34 roberto Exp roberto $
+** $Id: lgc.h,v 2.51 2011/09/30 12:44:19 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -52,10 +52,6 @@
 #define keepinvariant(g)  (isgenerational(g) || g->gcstate <= GCSatomic)
 
 
-#define gcstopped(g)	((g)->GCdebt == MIN_LMEM)
-#define stopgc(g)	((g)->GCdebt = MIN_LMEM)
-
-
 /*
 ** some useful bit tricks
 */
@@ -67,17 +63,14 @@
 #define l_setbit(x,b)		setbits(x, bitmask(b))
 #define resetbit(x,b)		resetbits(x, bitmask(b))
 #define testbit(x,b)		testbits(x, bitmask(b))
-#define set2bits(x,b1,b2)	setbits(x, (bit2mask(b1, b2)))
-#define reset2bits(x,b1,b2)	resetbits(x, (bit2mask(b1, b2)))
-
 
 
 /* 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  /* for userdata: has been finalized */
-#define SEPARATED	4  /*  "    ": it's in 'udgc' list or in 'tobefnz' */
+#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) */
@@ -108,7 +101,9 @@
 #define luaC_white(g)	cast(lu_byte, (g)->currentwhite & WHITEBITS)
 
 
-#define luaC_checkGC(L) {condchangemem(L); if (G(L)->GCdebt > 0) luaC_step(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) { if (valiswhite(v) && isblack(obj2gco(p)))  \
@@ -127,9 +122,9 @@
 #define luaC_barrierproto(L,p,c) \
    { if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); }
 
-LUAI_FUNC void luaC_separateudata (lua_State *L, int all);
 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,
@@ -137,7 +132,7 @@ LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz,
 LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
 LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
 LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c);
-LUAI_FUNC void luaC_checkfinalizer (lua_State *L, Udata *u);
+LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
 LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv);
 LUAI_FUNC void luaC_changemode (lua_State *L, int mode);
 

linit.c

@@ -1,16 +1,16 @@
 /*
-** $Id: linit.c,v 1.29 2010/10/25 14:32:36 roberto Exp roberto $
-** Initialization of libraries for lua.c and other clients        
+** $Id: linit.c,v 1.31 2011/01/26 16:30:02 roberto Exp roberto $
+** Initialization of libraries for lua.c and other clients
 ** See Copyright Notice in lua.h
 */
 
 
-/*                                                           
+/*
 ** 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.
-*/                                                              
+*/
 
 
 #define linit_c
@@ -57,7 +57,7 @@ LUALIB_API void luaL_openlibs (lua_State *L) {
     lua_pop(L, 1);  /* remove lib */
   }
   /* add open functions from 'preloadedlibs' into 'package.preload' table */
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
   for (lib = preloadedlibs; lib->func; lib++) {
     lua_pushcfunction(L, lib->func);
     lua_setfield(L, -2, lib->name);

liolib.c

@@ -1,10 +1,20 @@
 /*
-** $Id: liolib.c,v 2.94 2010/11/09 16:57:49 roberto Exp roberto $
+** $Id: liolib.c,v 2.107 2011/11/14 16:55:35 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
 
 
+/*
+** POSIX idiosyncrasy!
+** This definition must come before the inclusion of 'stdio.h'; it
+** should not affect non-POSIX systems
+*/
+#if !defined(_FILE_OFFSET_BITS)
+#define _FILE_OFFSET_BITS 64
+#endif
+
+
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -19,78 +29,96 @@
 #include "lualib.h"
 
 
-#define MAX_SIZE_T	(~(size_t)0)
+
+/*
+** {======================================================
+** lua_popen spawns a new process connected to the current
+** one through the file streams.
+** =======================================================
+*/
+
+#if !defined(lua_popen)	/* { */
+
+#if defined(LUA_USE_POPEN)	/* { */
+
+#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_WIN)		/* }{ */
+
+#define lua_popen(L,c,m)		((void)L, _popen(c,m))
+#define lua_pclose(L,file)		((void)L, _pclose(file))
+
+
+#else				/* }{ */
+
+#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			/* } */
+
+/* }====================================================== */
 
 
 /*
-** lua_popen spawns a new process connected to the current one through
-** the file streams.
+** {======================================================
+** lua_fseek/lua_ftell: configuration for longer offsets
+** =======================================================
 */
-#if !defined(lua_popen)
 
-#if defined(LUA_USE_POPEN)
+#if !defined(lua_fseek)	/* { */
 
-#define lua_popen(L,c,m)        ((void)L, fflush(NULL), popen(c,m))
-#define lua_pclose(L,file)      ((void)L, pclose(file))
+#if defined(LUA_USE_POSIX)
 
-#elif defined(LUA_WIN)
+#define l_fseek(f,o,w)		fseeko(f,o,w)
+#define l_ftell(f)		ftello(f)
+#define l_seeknum		off_t
 
-#define lua_popen(L,c,m)        ((void)L, _popen(c,m))
-#define lua_pclose(L,file)      ((void)L, _pclose(file))
+#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
 
-#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)
+#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_INPUT	1
-#define IO_OUTPUT	2
+#define IO_PREFIX	"_IO_"
+#define IO_INPUT	(IO_PREFIX "input")
+#define IO_OUTPUT	(IO_PREFIX "output")
 
 
-static const char *const fnames[] = {"input", "output"};
+typedef luaL_Stream LStream;
 
 
-static int pushresult (lua_State *L, int i, const char *filename) {
-  int en = errno;  /* calls to Lua API may change this value */
-  if (i) {
-    lua_pushboolean(L, 1);
-    return 1;
-  }
-  else {
-    lua_pushnil(L);
-    if (filename)
-      lua_pushfstring(L, "%s: %s", filename, strerror(en));
-    else
-      lua_pushfstring(L, "%s", strerror(en));
-    lua_pushinteger(L, en);
-    return 3;
-  }
-}
+#define tolstream(L)	((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
 
-
-static void fileerror (lua_State *L, int arg, const char *filename) {
-  lua_pushfstring(L, "%s: %s", filename, strerror(errno));
-  luaL_argerror(L, arg, lua_tostring(L, -1));
-}
-
-
-#define tofilep(L)	((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE))
+#define isclosed(p)	((p)->closef == NULL)
 
 
 static int io_type (lua_State *L) {
-  void *ud;
+  LStream *p;
   luaL_checkany(L, 1);
-  ud = luaL_testudata(L, 1, LUA_FILEHANDLE);
-  if (ud == NULL)
+  p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
+  if (p == NULL)
     lua_pushnil(L);  /* not a file */
-  else if (*((FILE **)ud) == NULL)
+  else if (isclosed(p))
     lua_pushliteral(L, "closed file");
   else
     lua_pushliteral(L, "file");
@@ -98,11 +126,22 @@ static int io_type (lua_State *L) {
 }
 
 
+static int f_tostring (lua_State *L) {
+  LStream *p = tolstream(L);
+  if (isclosed(p))
+    lua_pushliteral(L, "file (closed)");
+  else
+    lua_pushfstring(L, "file (%p)", p->f);
+  return 1;
+}
+
+
 static FILE *tofile (lua_State *L) {
-  FILE **f = tofilep(L);
-  if (*f == NULL)
+  LStream *p = tolstream(L);
+  if (isclosed(p))
     luaL_error(L, "attempt to use a closed file");
-  return *f;
+  lua_assert(p->f);
+  return p->f;
 }
 
 
@@ -111,45 +150,35 @@ static FILE *tofile (lua_State *L) {
 ** before opening the actual file; so, if there is a memory error, the
 ** file is not left opened.
 */
-static FILE **newprefile (lua_State *L) {
-  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
-  *pf = NULL;  /* file handle is currently `closed' */
+static LStream *newprefile (lua_State *L) {
+  LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
+  p->closef = NULL;  /* mark file handle as 'closed' */
   luaL_setmetatable(L, LUA_FILEHANDLE);
-  return pf;
+  return p;
 }
 
 
-static FILE **newfile (lua_State *L) {
-  FILE **pf = newprefile(L);
-  lua_pushvalue(L, lua_upvalueindex(1));  /* set upvalue... */
-  lua_setuservalue(L, -2);  /* ... as environment for new file */
-  return pf;
+static int aux_close (lua_State *L) {
+  LStream *p = tolstream(L);
+  lua_CFunction cf = p->closef;
+  p->closef = NULL;  /* mark stream as closed */
+  return (*cf)(L);  /* close it */
 }
 
 
-/*
-** function to (not) close the standard files stdin, stdout, and stderr
-*/
-static int io_noclose (lua_State *L) {
-  lua_pushnil(L);
-  lua_pushliteral(L, "cannot close standard file");
-  return 2;
+static int io_close (lua_State *L) {
+  if (lua_isnone(L, 1))  /* no argument? */
+    lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT);  /* use standard output */
+  tofile(L);  /* make sure argument is an open stream */
+  return aux_close(L);
 }
 
 
-/*
-** function to close 'popen' files
-*/
-static int io_pclose (lua_State *L) {
-  FILE **p = tofilep(L);
-  int stat = lua_pclose(L, *p);
-  *p = NULL;
-  if (stat == -1)  /* error? */
-    return pushresult(L, 0, NULL);
-  else {
-    lua_pushinteger(L, stat);
-    return 1;  /* return status */
-  }
+static int f_gc (lua_State *L) {
+  LStream *p = tolstream(L);
+  if (!isclosed(p) && p->f != NULL)
+    aux_close(L);  /* ignore closed and incompletely open files */
+  return 0;
 }
 
 
@@ -157,112 +186,94 @@ static int io_pclose (lua_State *L) {
 ** function to close regular files
 */
 static int io_fclose (lua_State *L) {
-  FILE **p = tofilep(L);
-  int ok = (fclose(*p) == 0);
-  *p = NULL;
-  return pushresult(L, ok, NULL);
+  LStream *p = tolstream(L);
+  int res = fclose(p->f);
+  return luaL_fileresult(L, (res == 0), NULL);
 }
 
 
-static int aux_close (lua_State *L) {
-  lua_getuservalue(L, 1);
-  lua_getfield(L, -1, "__close");
-  return (lua_tocfunction(L, -1))(L);
+static LStream *newfile (lua_State *L) {
+  LStream *p = newprefile(L);
+  p->f = NULL;
+  p->closef = &io_fclose;
+  return p;
 }
 
 
-static int io_close (lua_State *L) {
-  if (lua_isnone(L, 1))
-    lua_rawgeti(L, lua_upvalueindex(1), IO_OUTPUT);
-  tofile(L);  /* make sure argument is a file */
-  return aux_close(L);
-}
-
-
-static int io_gc (lua_State *L) {
-  FILE *f = *tofilep(L);
-  /* ignore closed files */
-  if (f != NULL)
-    aux_close(L);
-  return 0;
-}
-
-
-static int io_tostring (lua_State *L) {
-  FILE *f = *tofilep(L);
-  if (f == NULL)
-    lua_pushliteral(L, "file (closed)");
-  else
-    lua_pushfstring(L, "file (%p)", f);
-  return 1;
+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 " LUA_QS " (%s)", fname, strerror(errno));
 }
 
 
 static int io_open (lua_State *L) {
   const char *filename = luaL_checkstring(L, 1);
   const char *mode = luaL_optstring(L, 2, "r");
-  FILE **pf;
+  LStream *p = newfile(L);
   int i = 0;
   /* check whether 'mode' matches '[rwa]%+?b?' */
   if (!(mode[i] != '\0' && strchr("rwa", mode[i++]) != NULL &&
-       (mode[i] != '+' || ++i) &&    /* skip if char is '+' */
-       (mode[i] != 'b' || ++i) &&    /* skip if char is 'b' */
+       (mode[i] != '+' || ++i) &&  /* skip if char is '+' */
+       (mode[i] != 'b' || ++i) &&  /* skip if char is 'b' */
        (mode[i] == '\0')))
-    luaL_error(L, "invalid mode " LUA_QL("%s")
-                  " (should match " LUA_QL("[rwa]%%+?b?") ")", mode);
-  pf = newfile(L);
-  *pf = fopen(filename, mode);
-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+    return luaL_error(L, "invalid mode " LUA_QS
+                         " (should match " LUA_QL("[rwa]%%+?b?") ")", mode);
+  p->f = fopen(filename, mode);
+  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
 
 
 /*
-** this function has a separated environment, which defines the
-** correct __close for 'popen' files
+** function to close 'popen' files
 */
+static int io_pclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  return luaL_execresult(L, lua_pclose(L, p->f));
+}
+
+
 static int io_popen (lua_State *L) {
   const char *filename = luaL_checkstring(L, 1);
   const char *mode = luaL_optstring(L, 2, "r");
-  FILE **pf = newfile(L);
-  *pf = lua_popen(L, filename, mode);
-  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+  LStream *p = newprefile(L);
+  p->f = lua_popen(L, filename, mode);
+  p->closef = &io_pclose;
+  return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
 
 
 static int io_tmpfile (lua_State *L) {
-  FILE **pf = newfile(L);
-  *pf = tmpfile();
-  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
+  LStream *p = newfile(L);
+  p->f = tmpfile();
+  return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
 }
 
 
-static FILE *getiofile (lua_State *L, int findex) {
-  FILE *f;
-  lua_rawgeti(L, lua_upvalueindex(1), findex);
-  f = *(FILE **)lua_touserdata(L, -1);
-  if (f == NULL)
-    luaL_error(L, "standard %s file is closed", fnames[findex - 1]);
-  return f;
+static FILE *getiofile (lua_State *L, const char *findex) {
+  LStream *p;
+  lua_getfield(L, LUA_REGISTRYINDEX, findex);
+  p = (LStream *)lua_touserdata(L, -1);
+  if (isclosed(p))
+    luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX));
+  return p->f;
 }
 
 
-static int g_iofile (lua_State *L, int f, const char *mode) {
+static int g_iofile (lua_State *L, const char *f, const char *mode) {
   if (!lua_isnoneornil(L, 1)) {
     const char *filename = lua_tostring(L, 1);
-    if (filename) {
-      FILE **pf = newfile(L);
-      *pf = fopen(filename, mode);
-      if (*pf == NULL)
-        fileerror(L, 1, filename);
-    }
+    if (filename)
+      opencheck(L, filename, mode);
     else {
       tofile(L);  /* check that it's a valid file handle */
       lua_pushvalue(L, 1);
     }
-    lua_rawseti(L, lua_upvalueindex(1), f);
+    lua_setfield(L, LUA_REGISTRYINDEX, f);
   }
   /* return current value */
-  lua_rawgeti(L, lua_upvalueindex(1), f);
+  lua_getfield(L, LUA_REGISTRYINDEX, f);
   return 1;
 }
 
@@ -304,18 +315,15 @@ static int io_lines (lua_State *L) {
   int toclose;
   if (lua_isnone(L, 1)) lua_pushnil(L);  /* at least one argument */
   if (lua_isnil(L, 1)) {  /* no file name? */
-    lua_rawgeti(L, lua_upvalueindex(1), IO_INPUT);  /* get default input */
-    lua_replace(L, 1);   /* put it at index 1 */
+    lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT);  /* get default input */
+    lua_replace(L, 1);  /* put it at index 1 */
     tofile(L);  /* check that it's a valid file handle */
     toclose = 0;  /* do not close it after iteration */
   }
   else {  /* open a new file */
     const char *filename = luaL_checkstring(L, 1);
-    FILE **pf = newfile(L);
-    *pf = fopen(filename, "r");
-    if (*pf == NULL)
-      fileerror(L, 1, filename);
-    lua_replace(L, 1);   /* put file at index 1 */
+    opencheck(L, filename, "r");
+    lua_replace(L, 1);  /* put file at index 1 */
     toclose = 1;  /* close it after iteration */
   }
   aux_lines(L, toclose);
@@ -373,6 +381,8 @@ static int read_line (lua_State *L, FILE *f, int chop) {
 }
 
 
+#define MAX_SIZE_T	(~(size_t)0)
+
 static void read_all (lua_State *L, FILE *f) {
   size_t rlen = LUAL_BUFFERSIZE;  /* how much to read in each cycle */
   luaL_Buffer b;
@@ -443,7 +453,7 @@ static int g_read (lua_State *L, FILE *f, int first) {
     }
   }
   if (ferror(f))
-    return pushresult(L, 0, NULL);
+    return luaL_fileresult(L, 0, NULL);
   if (!success) {
     lua_pop(L, 1);  /* remove last result */
     lua_pushnil(L);  /* push nil instead */
@@ -463,22 +473,23 @@ static int f_read (lua_State *L) {
 
 
 static int io_readline (lua_State *L) {
-  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1));
+  LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
   int i;
   int n = (int)lua_tointeger(L, lua_upvalueindex(2));
-  if (f == NULL)  /* file is already closed? */
-    luaL_error(L, "file is already closed");
+  if (isclosed(p))  /* file is already closed? */
+    return luaL_error(L, "file is already closed");
   lua_settop(L , 1);
   for (i = 1; i <= n; i++)  /* push arguments to 'g_read' */
     lua_pushvalue(L, lua_upvalueindex(3 + i));
-  n = g_read(L, f, 2);  /* 'n' is number of results */
+  n = g_read(L, p->f, 2);  /* 'n' is number of results */
   lua_assert(n > 0);  /* should return at least a nil */
   if (!lua_isnil(L, -n))  /* read at least one value? */
     return n;  /* return them */
   else {  /* first result is nil: EOF or error */
-    if (!lua_isnil(L, -1))  /* is there error information? */
-      return luaL_error(L, "%s", lua_tostring(L, -1));  /* error */
-    /* else EOF */
+    if (n > 1) {  /* is there error information? */
+      /* 2nd result is error message */
+      return luaL_error(L, "%s", lua_tostring(L, -n + 1));
+    }
     if (lua_toboolean(L, lua_upvalueindex(3))) {  /* generator created file? */
       lua_settop(L, 0);
       lua_pushvalue(L, lua_upvalueindex(1));
@@ -507,7 +518,7 @@ static int g_write (lua_State *L, FILE *f, int arg) {
     }
   }
   if (status) return 1;  /* file handle already on stack top */
-  else return pushresult(L, status, NULL);
+  else return luaL_fileresult(L, status, NULL);
 }
 
 
@@ -517,7 +528,7 @@ static int io_write (lua_State *L) {
 
 
 static int f_write (lua_State *L) {
-  FILE * f = tofile(L); 
+  FILE *f = tofile(L);
   lua_pushvalue(L, 1);  /* push file at the stack top (to be returned) */
   return g_write(L, f, 2);
 }
@@ -528,12 +539,15 @@ 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);
-  long offset = luaL_optlong(L, 3, 0);
-  op = fseek(f, offset, mode[op]);
+  lua_Number p3 = luaL_optnumber(L, 3, 0);
+  l_seeknum offset = (l_seeknum)p3;
+  luaL_argcheck(L, (lua_Number)offset == p3, 3,
+                  "not an integer in proper range");
+  op = l_fseek(f, offset, mode[op]);
   if (op)
-    return pushresult(L, 0, NULL);  /* error */
+    return luaL_fileresult(L, 0, NULL);  /* error */
   else {
-    lua_pushinteger(L, ftell(f));
+    lua_pushnumber(L, (lua_Number)l_ftell(f));
     return 1;
   }
 }
@@ -546,21 +560,24 @@ static int f_setvbuf (lua_State *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], sz);
-  return pushresult(L, res == 0, NULL);
+  return luaL_fileresult(L, res == 0, NULL);
 }
 
 
 
 static int io_flush (lua_State *L) {
-  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
+  return luaL_fileresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
 }
 
 
 static int f_flush (lua_State *L) {
-  return pushresult(L, fflush(tofile(L)) == 0, NULL);
+  return luaL_fileresult(L, fflush(tofile(L)) == 0, NULL);
 }
 
 
+/*
+** functions for 'io' library
+*/
 static const luaL_Reg iolib[] = {
   {"close", io_close},
   {"flush", io_flush},
@@ -577,6 +594,9 @@ static const luaL_Reg iolib[] = {
 };
 
 
+/*
+** methods for file handles
+*/
 static const luaL_Reg flib[] = {
   {"close", io_close},
   {"flush", f_flush},
@@ -585,8 +605,8 @@ static const luaL_Reg flib[] = {
   {"seek", f_seek},
   {"setvbuf", f_setvbuf},
   {"write", f_write},
-  {"__gc", io_gc},
-  {"__tostring", io_tostring},
+  {"__gc", f_gc},
+  {"__tostring", f_tostring},
   {NULL, NULL}
 };
 
@@ -600,46 +620,38 @@ static void createmeta (lua_State *L) {
 }
 
 
-static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) {
-  *newprefile(L) = f;
-  if (k > 0) {
-    lua_pushvalue(L, -1);  /* copy new file */
-    lua_rawseti(L, 1, k);  /* add it to common upvalue */
-  }
-  lua_pushvalue(L, 3);  /* get environment for default files */
-  lua_setuservalue(L, -2);  /* set it as environment for file */
-  lua_setfield(L, 2, fname);  /* add file to module */
+/*
+** function to (not) close the standard files stdin, stdout, and stderr
+*/
+static int io_noclose (lua_State *L) {
+  LStream *p = tolstream(L);
+  p->closef = &io_noclose;  /* keep file opened */
+  lua_pushnil(L);
+  lua_pushliteral(L, "cannot close standard file");
+  return 2;
 }
 
 
-/*
-** pushes a new table with {__close = cls}
-*/
-static void newenv (lua_State *L, lua_CFunction cls) {
-  lua_createtable(L, 0, 1);
-  lua_pushcfunction(L, cls);
-  lua_setfield(L, -2, "__close");
+static void createstdfile (lua_State *L, FILE *f, const char *k,
+                           const char *fname) {
+  LStream *p = newprefile(L);
+  p->f = f;
+  p->closef = &io_noclose;
+  if (k != NULL) {
+    lua_pushvalue(L, -1);
+    lua_setfield(L, LUA_REGISTRYINDEX, k);  /* add file to registry */
+  }
+  lua_setfield(L, -2, fname);  /* add file to module */
 }
 
 
 LUAMOD_API int luaopen_io (lua_State *L) {
-  lua_settop(L, 0);
+  luaL_newlib(L, iolib);  /* new module */
   createmeta(L);
-  /* create (private) environment (with fields IO_INPUT, IO_OUTPUT, __close) */
-  newenv(L, io_fclose);  /* upvalue for all io functions at index 1 */
-  luaL_newlibtable(L, iolib);  /* new module at index 2 */
-  lua_pushvalue(L, 1);  /* copy of env to be consumed by 'setfuncs' */
-  luaL_setfuncs(L, iolib, 1);
   /* create (and set) default files */
-  newenv(L, io_noclose);  /* environment for default files at index 3 */
   createstdfile(L, stdin, IO_INPUT, "stdin");
   createstdfile(L, stdout, IO_OUTPUT, "stdout");
-  createstdfile(L, stderr, 0, "stderr");
-  lua_pop(L, 1);  /* pop environment for default files */
-  lua_getfield(L, 2, "popen");
-  newenv(L, io_pclose);  /* create environment for 'popen' streams */
-  lua_setupvalue(L, -2, 1);  /* set it as upvalue for 'popen' */
-  lua_pop(L, 1);  /* pop 'popen' */
+  createstdfile(L, stderr, NULL, "stderr");
   return 1;
 }
 

llex.c

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.40 2010/10/25 12:24:36 roberto Exp roberto $
+** $Id: llex.c,v 2.58 2011/08/15 19:41:58 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -35,10 +35,10 @@
 /* ORDER RESERVED */
 static const char *const luaX_tokens [] = {
     "and", "break", "do", "else", "elseif",
-    "end", "false", "for", "function", "if",
+    "end", "false", "for", "function", "goto", "if",
     "in", "local", "nil", "not", "or", "repeat",
     "return", "then", "true", "until", "while",
-    "..", "...", "==", ">=", "<=", "~=", "<eof>",
+    "..", "...", "==", ">=", "<=", "~=", "::", "<eof>",
     "<number>", "<name>", "<string>"
 };
 
@@ -46,7 +46,7 @@ static const char *const luaX_tokens [] = {
 #define save_and_next(ls) (save(ls, ls->current), next(ls))
 
 
-static void lexerror (LexState *ls, const char *msg, int token);
+static l_noret lexerror (LexState *ls, const char *msg, int token);
 
 
 static void save (LexState *ls, int c) {
@@ -67,7 +67,6 @@ void luaX_init (lua_State *L) {
   for (i=0; i<NUM_RESERVED; i++) {
     TString *ts = luaS_new(L, luaX_tokens[i]);
     luaS_fix(ts);  /* reserved words are never collected */
-    lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
     ts->tsv.reserved = cast_byte(i+1);  /* reserved word */
   }
 }
@@ -102,7 +101,7 @@ static const char *txtToken (LexState *ls, int token) {
 }
 
 
-static void lexerror (LexState *ls, const char *msg, int token) {
+static l_noret lexerror (LexState *ls, const char *msg, int token) {
   char buff[LUA_IDSIZE];
   luaO_chunkid(buff, getstr(ls->source), LUA_IDSIZE);
   msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
@@ -112,7 +111,7 @@ static void lexerror (LexState *ls, const char *msg, int token) {
 }
 
 
-void luaX_syntaxerror (LexState *ls, const char *msg) {
+l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
   lexerror(ls, msg, ls->t.token);
 }
 
@@ -127,8 +126,10 @@ TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   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_setstr(L, ls->fs->h, ts); 
-  if (ttisnil(o)) {
+  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);
   }
@@ -152,9 +153,11 @@ static void inclinenumber (LexState *ls) {
 }
 
 
-void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
+void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
+                    int firstchar) {
   ls->decpoint = '.';
   ls->L = L;
+  ls->current = firstchar;
   ls->lookahead.token = TK_EOS;  /* no look-ahead token */
   ls->z = z;
   ls->fs = NULL;
@@ -164,7 +167,6 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
   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 */
-  next(ls);  /* read first char */
 }
 
 
@@ -185,7 +187,7 @@ static int check_next (LexState *ls, const char *set) {
 }
 
 
-/* 
+/*
 ** change all characters 'from' in buffer to 'to'
 */
 static void buffreplace (LexState *ls, char from, char to) {
@@ -200,6 +202,9 @@ static void buffreplace (LexState *ls, char from, char to) {
 #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
@@ -208,7 +213,7 @@ static void trydecpoint (LexState *ls, SemInfo *seminfo) {
   char old = ls->decpoint;
   ls->decpoint = getlocaledecpoint();
   buffreplace(ls, old, ls->decpoint);  /* try new decimal separator */
-  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) {
+  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_NUMBER);
@@ -226,7 +231,7 @@ static void read_numeral (LexState *ls, SemInfo *seminfo) {
   } while (lislalnum(ls->current) || ls->current == '.');
   save(ls, '\0');
   buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
-  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r))  /* format error? */
+  if (!buff2d(ls->buff, &seminfo->r))  /* format error? */
     trydecpoint(ls, seminfo); /* try to update decimal point separator */
 }
 
@@ -283,45 +288,41 @@ static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
 }
 
 
-static int hexavalue (int c) {
-  if (lisdigit(c)) return c - '0';
-  else if (lisupper(c)) return c - 'A' + 10;
-  else return c - 'a' + 10;
+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 c1, c2 = EOZ;
-  if (!lisxdigit(c1 = next(ls)) || !lisxdigit(c2 = next(ls))) {
-    luaZ_resetbuffer(ls->buff);  /* prepare error message */
-    save(ls, '\\'); save(ls, 'x');
-    if (c1 != EOZ) save(ls, c1);
-    if (c2 != EOZ) save(ls, c2);
-    lexerror(ls, "hexadecimal digit expected", TK_STRING);
+  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 hexa digits */
+    c[i] = next(ls);
+    if (!lisxdigit(c[i]))
+      escerror(ls, c, i + 1, "hexadecimal digit expected");
+    r = (r << 4) + luaO_hexavalue(c[i]);
   }
-  return (hexavalue(c1) << 4) + hexavalue(c2);
+  return r;
 }
 
 
 static int readdecesc (LexState *ls) {
-  int c1 = ls->current, c2, c3;
-  int c = c1 - '0';
-  if (lisdigit(c2 = next(ls))) {
-    c = 10*c + c2 - '0';
-    if (lisdigit(c3 = next(ls))) {
-      c = 10*c + c3 - '0';
-      if (c > UCHAR_MAX) {
-        luaZ_resetbuffer(ls->buff);  /* prepare error message */
-        save(ls, '\\');
-        save(ls, c1); save(ls, c2); save(ls, c3);
-        lexerror(ls, "decimal escape too large", TK_STRING);
-      }
-      return c;
-    }
+  int c[3], i;
+  int r = 0;  /* result accumulator */
+  for (i = 0; i < 3 && lisdigit(ls->current); i++) {  /* read up to 3 digits */
+    c[i] = ls->current;
+    r = 10*r + c[i] - '0';
+    next(ls);
   }
-  /* else, has read one character that was not a digit */
-  zungetc(ls->z);  /* return it to input stream */
-  return c;
+  if (r > UCHAR_MAX)
+    escerror(ls, c, i, "decimal escape too large");
+  return r;
 }
 
 
@@ -340,36 +341,38 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
         int c;  /* final character to be saved */
         next(ls);  /* do not save the `\' */
         switch (ls->current) {
-          case 'a': c = '\a'; break;
-          case 'b': c = '\b'; break;
-          case 'f': c = '\f'; break;
-          case 'n': c = '\n'; break;
-          case 'r': c = '\r'; break;
-          case 't': c = '\t'; break;
-          case 'v': c = '\v'; break;
-          case 'x': c = readhexaesc(ls); break;
-          case '\n':
-          case '\r': save(ls, '\n'); inclinenumber(ls); continue;
-          case EOZ: continue;  /* will raise an error next loop */
-          case '*': {  /* skip following span of spaces */
-            next(ls);  /* skip the '*' */
+          case 'a': c = '\a'; goto read_save;
+          case 'b': c = '\b'; goto read_save;
+          case 'f': c = '\f'; goto read_save;
+          case 'n': c = '\n'; goto read_save;
+          case 'r': c = '\r'; goto read_save;
+          case 't': c = '\t'; goto read_save;
+          case 'v': c = '\v'; goto read_save;
+          case 'x': c = readhexaesc(ls); goto read_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 */
+            next(ls);  /* skip the 'z' */
             while (lisspace(ls->current)) {
               if (currIsNewline(ls)) inclinenumber(ls);
               else next(ls);
             }
-            continue;  /* do not save 'c' */
+            goto no_save;
           }
           default: {
             if (!lisdigit(ls->current))
-              c = ls->current;  /* handles \\, \", \', and \? */
-            else  /* digital escape \ddd */
-              c = readdecesc(ls);
-            break;
+              escerror(ls, &ls->current, 1, "invalid escape sequence");
+            /* digital escape \ddd */
+            c = readdecesc(ls);
+            goto only_save;
           }
         }
-        next(ls);
-        save(ls, c);
-        break;
+       read_save: next(ls);  /* read next character */
+       only_save: save(ls, c);  /* save 'c' */
+       no_save: break;
       }
       default:
         save_and_next(ls);
@@ -441,6 +444,11 @@ static int llex (LexState *ls, SemInfo *seminfo) {
         if (ls->current != '=') return '~';
         else { next(ls); return TK_NE; }
       }
+      case ':': {
+        next(ls);
+        if (ls->current != ':') return ':';
+        else { next(ls); return TK_DBCOLON; }
+      }
       case '"': case '\'': {  /* short literal strings */
         read_string(ls, ls->current, seminfo);
         return TK_STRING;

llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h,v 1.64 2010/03/13 15:55:42 roberto Exp roberto $
+** $Id: llex.h,v 1.71 2011/06/20 16:52:48 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -13,8 +13,6 @@
 
 #define FIRST_RESERVED	257
 
-/* maximum length of a reserved word */
-#define TOKEN_LEN	(sizeof("function")/sizeof(char))
 
 
 /*
@@ -25,10 +23,10 @@ enum RESERVED {
   /* terminal symbols denoted by reserved words */
   TK_AND = FIRST_RESERVED, TK_BREAK,
   TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
-  TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
+  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_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_EOS,
+  TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
   TK_NUMBER, TK_NAME, TK_STRING
 };
 
@@ -48,17 +46,19 @@ typedef struct Token {
 } Token;
 
 
+/* state of the lexer plus state of the parser when shared by all
+   functions */
 typedef struct LexState {
   int current;  /* current character (charint) */
   int linenumber;  /* input line counter */
   int lastline;  /* line of last token `consumed' */
   Token t;  /* current token */
   Token lookahead;  /* look ahead token */
-  struct FuncState *fs;  /* `FuncState' is private to the parser */
+  struct FuncState *fs;  /* current function (parser) */
   struct lua_State *L;
   ZIO *z;  /* input stream */
   Mbuffer *buff;  /* buffer for tokens */
-  struct Varlist *varl;  /* list of all active local variables */
+  struct Dyndata *dyd;  /* dynamic structures used by the parser */
   TString *source;  /* current source name */
   TString *envn;  /* environment variable name */
   char decpoint;  /* locale decimal point */
@@ -67,11 +67,11 @@ typedef struct LexState {
 
 LUAI_FUNC void luaX_init (lua_State *L);
 LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
-                              TString *source);
+                              TString *source, int firstchar);
 LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
 LUAI_FUNC void luaX_next (LexState *ls);
 LUAI_FUNC int luaX_lookahead (LexState *ls);
-LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);
+LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
 LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
 
 

llimits.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llimits.h,v 1.83 2010/11/03 15:16:17 roberto Exp roberto $
+** $Id: llimits.h,v 1.94 2011/11/29 15:39:48 roberto Exp roberto $
 ** Limits, basic types, and some other `installation-dependent' definitions
 ** See Copyright Notice in lua.h
 */
@@ -30,7 +30,6 @@ typedef unsigned char lu_byte;
 #define MAX_SIZET	((size_t)(~(size_t)0)-2)
 
 #define MAX_LUMEM	((lu_mem)(~(lu_mem)0)-2)
-#define MIN_LMEM	((l_mem)~((~(lu_mem)0)>>1))
 
 
 #define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
@@ -59,21 +58,28 @@ typedef LUAI_UACNUMBER l_uacNumber;
 /* 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)	{ if (!(c)) lua_assert(0); }
 #else
-#define lua_assert(c)		/* empty */
+#define lua_assert(c)		((void)0)
 #define check_exp(c,e)		(e)
+#define lua_longassert(c)	((void)0)
 #endif
 
 /*
 ** assertion for checking API calls
 */
+#if !defined(luai_apicheck)
+
 #if defined(LUA_USE_APICHECK)
 #include <assert.h>
-#define luai_apicheck(L,e)	{ (void)L; assert(e); }
-#elif !defined(luai_apicheck)
+#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)
 
 
@@ -87,6 +93,20 @@ typedef LUAI_UACNUMBER l_uacNumber;
 #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))
+
+
+/*
+** non-return type
+*/
+#if defined(__GNUC__)
+#define l_noret		void __attribute__((noreturn))
+#elif defined(_MSC_VER)
+#define l_noret		void __declspec(noreturn)
+#else
+#define l_noret		void
+#endif
+
 
 
 /*
@@ -173,6 +193,9 @@ typedef lu_int32 Instruction;
 ** 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(MS_ASMTRICK)	/* { */
@@ -203,6 +226,10 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
     volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
     (i) = (t)u.l_p[LUA_IEEEENDIAN]; }
 
+#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_number2integer(i,n)		lua_number2int32(i, n, lua_Integer)
 #define lua_number2unsigned(i,n)	lua_number2int32(i, n, lua_Unsigned)
@@ -241,14 +268,8 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
 #endif
 
 
-/*
-** luai_hashnum is a macro do 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).
-** It is used only in ltable.c.
-*/
 
-#if !defined(luai_hashnum)	/* { */
+#if defined(ltable_c) && !defined(luai_hashnum)
 
 #include <float.h>
 #include <math.h>
@@ -257,7 +278,7 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
   n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP);  \
   lua_number2int(i, n); i += e; }
 
-#endif						/* } */
+#endif
 
 
 
@@ -275,7 +296,7 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
 #define condchangemem(L)	condmovestack(L)
 #else
 #define condchangemem(L)  \
-	((void)(gcstopped(G(L)) || (luaC_fullgc(L, 0), 1)))
+	((void)(!(G(L)->gcrunning) || (luaC_fullgc(L, 0), 1)))
 #endif
 
 #endif

lmathlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.78 2010/11/12 15:47:34 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.79 2010/11/18 18:38:27 roberto Exp roberto $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -134,15 +134,12 @@ static int math_log (lua_State *L) {
   return 1;
 }
 
+#if defined(LUA_COMPAT_LOG10)
 static int math_log10 (lua_State *L) {
-#if !defined(LUA_COMPAT_LOG10)
-  return luaL_error(L, "function " LUA_QL("log10")
-                       " is deprecated; use log(x, 10) instead");
-#else
   lua_pushnumber(L, l_tg(log10)(luaL_checknumber(L, 1)));
   return 1;
-#endif
 }
+#endif
 
 static int math_exp (lua_State *L) {
   lua_pushnumber(L, l_tg(exp)(luaL_checknumber(L, 1)));
@@ -252,7 +249,9 @@ static const luaL_Reg mathlib[] = {
   {"fmod",   math_fmod},
   {"frexp", math_frexp},
   {"ldexp", math_ldexp},
+#if defined(LUA_COMPAT_LOG10)
   {"log10", math_log10},
+#endif
   {"log",   math_log},
   {"max",   math_max},
   {"min",   math_min},

lmem.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.c,v 1.78 2010/05/04 18:10:02 roberto Exp roberto $
+** $Id: lmem.c,v 1.82 2011/09/20 19:25:23 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -63,9 +63,8 @@ void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
 }
 
 
-void *luaM_toobig (lua_State *L) {
+l_noret luaM_toobig (lua_State *L) {
   luaG_runerror(L, "memory allocation error: block too big");
-  return NULL;  /* to avoid warnings */
 }
 
 
@@ -79,14 +78,14 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
   size_t realosize = (block) ? osize : 0;
   lua_assert((realosize == 0) == (block == NULL));
 #if defined(HARDMEMTESTS)
-  if (nsize > realosize && !gcstopped(g))
+  if (nsize > realosize && g->gcrunning)
     luaC_fullgc(L, 1);  /* force a GC whenever possible */
 #endif
   newblock = (*g->frealloc)(g->ud, block, osize, nsize);
   if (newblock == NULL && nsize > 0) {
     api_check(L, nsize > realosize,
                  "realloc cannot fail when shrinking a block");
-    if (!gcstopped(g)) {
+    if (g->gcrunning) {
       luaC_fullgc(L, 1);  /* try to free some memory... */
       newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
     }
@@ -94,9 +93,7 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
       luaD_throw(L, LUA_ERRMEM);
   }
   lua_assert((nsize == 0) == (newblock == NULL));
-  g->totalbytes = (g->totalbytes - realosize) + nsize;
-  if (!gcstopped(g))
-    g->GCdebt += nsize;  /* give some credit to garbage collector */
+  g->GCdebt = (g->GCdebt + nsize) - realosize;
 #if defined(TRACEMEM)
   { /* auxiliary patch to monitor garbage collection.
     ** To plot, gnuplot with following command:
@@ -108,9 +105,7 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
     if ((total % 200) == 0) {
       if (f == NULL) f = fopen(TRACEMEM, "w");
       fprintf(f, "%lu %u %d %d\n", total,
-              g->totalbytes,
-              gcstopped(g) ? 0 : g->GCdebt,
-              g->gcstate * 1000);
+              gettotalbytes(g), g->GCdebt, g->gcstate * 10000);
     }
   }
 #endif

lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h,v 1.35 2009/12/16 16:42:58 roberto Exp roberto $
+** $Id: lmem.h,v 1.37 2011/11/30 12:42:49 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -15,9 +15,9 @@
 
 
 #define luaM_reallocv(L,b,on,n,e) \
-	((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
-		luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
-		luaM_toobig(L))
+	((cast(size_t, (n)+1) > MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
+		(luaM_toobig(L), (void *)0) : \
+		luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
 
 #define luaM_freemem(L, b, s)	luaM_realloc_(L, (b), (s), 0)
 #define luaM_free(L, b)		luaM_realloc_(L, (b), sizeof(*(b)), 0)
@@ -37,7 +37,7 @@
 #define luaM_reallocvector(L, v,oldn,n,t) \
    ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
 
-LUAI_FUNC void *luaM_toobig (lua_State *L);
+LUAI_FUNC l_noret luaM_toobig (lua_State *L);
 
 /* not to be called directly */
 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.93 2010/11/10 18:05:36 roberto Exp roberto $
+** $Id: loadlib.c,v 1.107 2011/11/30 12:58:57 roberto Exp roberto $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -9,6 +9,14 @@
 */
 
 
+/*
+** if needed, includes windows header before everything else
+*/
+#if defined(_WIN32)
+#include <windows.h>
+#endif
+
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -62,6 +70,20 @@
 #endif
 
 
+/*
+** LUA_CSUBSEP is the character that replaces dots in submodule names
+** when searching for a C loader.
+** LUA_LSUBSEP is the character that replaces dots in submodule names
+** when searching for a Lua loader.
+*/
+#if !defined(LUA_CSUBSEP)
+#define LUA_CSUBSEP		LUA_DIRSEP
+#endif
+
+#if !defined(LUA_LSUBSEP)
+#define LUA_LSUBSEP		LUA_DIRSEP
+#endif
+
 
 /* prefix for open functions in C libraries */
 #define LUA_POF		"luaopen_"
@@ -110,7 +132,7 @@ static void ll_unloadlib (void *lib) {
 
 
 static void *ll_load (lua_State *L, const char *path, int seeglb) {
-  void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : 0));
+  void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
   if (lib == NULL) lua_pushstring(L, dlerror());
   return lib;
 }
@@ -133,8 +155,6 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
 ** =======================================================================
 */
 
-#include <windows.h>
-
 #undef setprogdir
 
 /*
@@ -164,7 +184,7 @@ static void pusherror (lua_State *L) {
   int error = GetLastError();
   char buffer[128];
   if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
-      NULL, error, 0, buffer, sizeof(buffer), NULL))
+      NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
     lua_pushstring(L, buffer);
   else
     lua_pushfstring(L, "system error %d\n", error);
@@ -177,7 +197,7 @@ static void ll_unloadlib (void *lib) {
 
 static void *ll_load (lua_State *L, const char *path, int seeglb) {
   HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
-  (void)(seeglb);  /* symbols are 'global' by default */
+  (void)(seeglb);  /* not used: symbols are 'global' by default */
   if (lib == NULL) pusherror(L);
   return lib;
 }
@@ -207,19 +227,19 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
 
 
 static void ll_unloadlib (void *lib) {
-  (void)(lib);  /* to avoid warnings */
+  (void)(lib);  /* not used */
 }
 
 
 static void *ll_load (lua_State *L, const char *path, int seeglb) {
-  (void)(path); (void)(seeglb);  /* to avoid warnings */
+  (void)(path); (void)(seeglb);  /* not used */
   lua_pushliteral(L, DLMSG);
   return NULL;
 }
 
 
 static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
-  (void)(lib); (void)(sym);  /* to avoid warnings */
+  (void)(lib); (void)(sym);  /* not used */
   lua_pushliteral(L, DLMSG);
   return NULL;
 }
@@ -321,9 +341,13 @@ static const char *pushnexttemplate (lua_State *L, const char *path) {
 
 
 static const char *searchpath (lua_State *L, const char *name,
-                                             const char *path) {
-  name = luaL_gsub(L, name, ".", LUA_DIRSEP);
-  lua_pushliteral(L, "");  /* error accumulator */
+                                             const char *path,
+                                             const char *sep,
+                                             const char *dirsep) {
+  luaL_Buffer msg;  /* to build error message */
+  luaL_buffinit(L, &msg);
+  if (*sep != '\0')  /* non-empty separator? */
+    name = luaL_gsub(L, name, sep, dirsep);  /* replace it by 'dirsep' */
   while ((path = pushnexttemplate(L, path)) != NULL) {
     const char *filename = luaL_gsub(L, lua_tostring(L, -1),
                                      LUA_PATH_MARK, name);
@@ -332,14 +356,18 @@ static const char *searchpath (lua_State *L, const char *name,
       return filename;  /* return that file name */
     lua_pushfstring(L, "\n\tno file " LUA_QS, filename);
     lua_remove(L, -2);  /* remove file name */
-    lua_concat(L, 2);  /* add entry to possible error message */
+    luaL_addvalue(&msg);  /* concatenate error msg. entry */
   }
+  luaL_pushresult(&msg);  /* create error message */
   return NULL;  /* not found */
 }
 
 
 static int ll_searchpath (lua_State *L) {
-  const char *f = searchpath(L, luaL_checkstring(L, 1), luaL_checkstring(L, 2));
+  const char *f = searchpath(L, luaL_checkstring(L, 1),
+                                luaL_checkstring(L, 2),
+                                luaL_optstring(L, 3, "."),
+                                luaL_optstring(L, 4, LUA_DIRSEP));
   if (f != NULL) return 1;
   else {  /* error message is on top of the stack */
     lua_pushnil(L);
@@ -350,30 +378,35 @@ static int ll_searchpath (lua_State *L) {
 
 
 static const char *findfile (lua_State *L, const char *name,
-                                           const char *pname) {
+                                           const char *pname,
+                                           const char *dirsep) {
   const char *path;
   lua_getfield(L, lua_upvalueindex(1), pname);
   path = lua_tostring(L, -1);
   if (path == NULL)
     luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
-  return searchpath(L, name, path);
+  return searchpath(L, name, path, ".", dirsep);
 }
 
 
-static void loaderror (lua_State *L, const char *filename) {
-  luaL_error(L, "error loading module " LUA_QS " from file " LUA_QS ":\n\t%s",
-                lua_tostring(L, 1), filename, lua_tostring(L, -1));
+static int checkload (lua_State *L, int stat, const char *filename) {
+  if (stat) {  /* module loaded successfully? */
+    lua_pushstring(L, filename);  /* will be 2nd argument to module */
+    return 2;  /* return open function and file name */
+  }
+  else
+    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));
 }
 
 
-static int loader_Lua (lua_State *L) {
+static int searcher_Lua (lua_State *L) {
   const char *filename;
   const char *name = luaL_checkstring(L, 1);
-  filename = findfile(L, name, "path");
-  if (filename == NULL) return 1;  /* library not found in this path */
-  if (luaL_loadfile(L, filename) != LUA_OK)
-    loaderror(L, filename);
-  return 1;  /* library loaded successfully */
+  filename = findfile(L, name, "path", LUA_LSUBSEP);
+  if (filename == NULL) return 1;  /* module not found in this path */
+  return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename);
 }
 
 
@@ -395,36 +428,38 @@ static int loadfunc (lua_State *L, const char *filename, const char *modname) {
 }
 
 
-static int loader_C (lua_State *L) {
+static int searcher_C (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
-  const char *filename = findfile(L, name, "cpath");
-  if (filename == NULL) return 1;  /* library not found in this path */
-  if (loadfunc(L, filename, name) != 0)
-    loaderror(L, filename);
-  return 1;  /* library loaded successfully */
+  const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP);
+  if (filename == NULL) return 1;  /* module not found in this path */
+  return checkload(L, (loadfunc(L, filename, name) == 0), filename);
 }
 
 
-static int loader_Croot (lua_State *L) {
+static int searcher_Croot (lua_State *L) {
   const char *filename;
   const char *name = luaL_checkstring(L, 1);
   const char *p = strchr(name, '.');
   int stat;
   if (p == NULL) return 0;  /* is root */
   lua_pushlstring(L, name, p - name);
-  filename = findfile(L, lua_tostring(L, -1), "cpath");
+  filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP);
   if (filename == NULL) return 1;  /* root not found */
   if ((stat = loadfunc(L, filename, name)) != 0) {
-    if (stat != ERRFUNC) loaderror(L, filename);  /* real error */
-    lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
-                       name, filename);
-    return 1;  /* function not found */
+    if (stat != ERRFUNC)
+      return checkload(L, 0, filename);  /* real error */
+    else {  /* open function not found */
+      lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
+                         name, filename);
+      return 1;
+    }
   }
-  return 1;
+  lua_pushstring(L, filename);  /* will be 2nd argument to module */
+  return 2;
 }
 
 
-static int loader_preload (lua_State *L) {
+static int searcher_preload (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
   lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
   lua_getfield(L, -1, name);
@@ -434,35 +469,49 @@ static int loader_preload (lua_State *L) {
 }
 
 
+static void findloader (lua_State *L, const char *name) {
+  int i;
+  luaL_Buffer msg;  /* to build error message */
+  luaL_buffinit(L, &msg);
+  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 seachers to find a loader */
+  for (i = 1; ; i++) {
+    lua_rawgeti(L, 3, i);  /* get a seacher */
+    if (lua_isnil(L, -1)) {  /* no more searchers? */
+      lua_pop(L, 1);  /* remove nil */
+      luaL_pushresult(&msg);  /* create error message */
+      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 */
+    if (lua_isfunction(L, -2))  /* did it find a loader? */
+      return;  /* module loader found */
+    else if (lua_isstring(L, -2)) {  /* searcher returned error message? */
+      lua_pop(L, 1);  /* remove extra return */
+      luaL_addvalue(&msg);  /* concatenate error message */
+    }
+    else
+      lua_pop(L, 2);  /* remove both returns */
+  }
+}
+
+
 static int ll_require (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
-  int i;
   lua_settop(L, 1);  /* _LOADED table will be at index 2 */
   lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_getfield(L, 2, name);
+  lua_getfield(L, 2, name);  /* _LOADED[name] */
   if (lua_toboolean(L, -1))  /* is it there? */
     return 1;  /* package is already loaded */
-  /* else must load it; iterate over available loaders */
-  lua_getfield(L, lua_upvalueindex(1), "loaders");
-  if (!lua_istable(L, -1))
-    luaL_error(L, LUA_QL("package.loaders") " must be a table");
-  lua_pushliteral(L, "");  /* error message accumulator */
-  for (i=1; ; i++) {
-    lua_rawgeti(L, -2, i);  /* get a loader */
-    if (lua_isnil(L, -1))
-      luaL_error(L, "module " LUA_QS " not found:%s",
-                    name, lua_tostring(L, -2));
-    lua_pushstring(L, name);
-    lua_call(L, 1, 1);  /* call it */
-    if (lua_isfunction(L, -1))  /* did it find module? */
-      break;  /* module loaded successfully */
-    else if (lua_isstring(L, -1))  /* loader returned error message? */
-      lua_concat(L, 2);  /* accumulate it */
-    else
-      lua_pop(L, 1);
-  }
-  lua_pushstring(L, name);  /* pass name as argument to module */
-  lua_call(L, 1, 1);  /* run loaded module */
+  /* else must load package */
+  lua_pop(L, 1);  /* remove 'getfield' result */
+  findloader(L, name);
+  lua_pushstring(L, name);  /* pass name as argument to module loader */
+  lua_insert(L, -2);  /* name is 1st argument (before search data) */
+  lua_call(L, 2, 1);  /* run loader to load module */
   if (!lua_isnil(L, -1))  /* non-nil return? */
     lua_setfield(L, 2, name);  /* _LOADED[name] = returned value */
   lua_getfield(L, 2, name);
@@ -503,9 +552,11 @@ static void set_env (lua_State *L) {
 static void dooptions (lua_State *L, int n) {
   int i;
   for (i = 2; i <= n; i++) {
-    lua_pushvalue(L, i);  /* get option (a function) */
-    lua_pushvalue(L, -2);  /* module */
-    lua_call(L, 1, 0);
+    if (lua_isfunction(L, i)) {  /* avoid 'calling' extra info. */
+      lua_pushvalue(L, i);  /* get option (a function) */
+      lua_pushvalue(L, -2);  /* module */
+      lua_call(L, 1, 0);
+    }
   }
 }
 
@@ -556,17 +607,6 @@ static int ll_seeall (lua_State *L) {
   return 0;
 }
 
-
-#else
-
-static int ll_seeall (lua_State *L) {
-  return luaL_error(L, "deprecated function");
-}
-
-static int ll_module (lua_State *L) {
-  return luaL_error(L, "deprecated function");
-}
-
 #endif
 /* }====================================================== */
 
@@ -575,12 +615,25 @@ static int ll_module (lua_State *L) {
 /* auxiliary mark (for internal use) */
 #define AUXMARK		"\1"
 
+
+/*
+** return registry.LUA_NOENV as a boolean
+*/
+static int noenv (lua_State *L) {
+  int b;
+  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
+  b = lua_toboolean(L, -1);
+  lua_pop(L, 1);  /* remove value */
+  return b;
+}
+
+
 static void setpath (lua_State *L, const char *fieldname, const char *envname1,
                                    const char *envname2, const char *def) {
   const char *path = getenv(envname1);
   if (path == NULL)  /* no environment variable? */
     path = getenv(envname2);  /* try alternative name */
-  if (path == NULL)  /* no environment variable? */
+  if (path == NULL || noenv(L))  /* no environment variable? */
     lua_pushstring(L, def);  /* use default */
   else {
     /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
@@ -597,20 +650,24 @@ static void setpath (lua_State *L, const char *fieldname, const char *envname1,
 static const luaL_Reg pk_funcs[] = {
   {"loadlib", ll_loadlib},
   {"searchpath", ll_searchpath},
+#if defined(LUA_COMPAT_MODULE)
   {"seeall", ll_seeall},
+#endif
   {NULL, NULL}
 };
 
 
 static const luaL_Reg ll_funcs[] = {
+#if defined(LUA_COMPAT_MODULE)
   {"module", ll_module},
+#endif
   {"require", ll_require},
   {NULL, NULL}
 };
 
 
-static const lua_CFunction loaders[] =
-  {loader_preload, loader_Lua, loader_C, loader_Croot, NULL};
+static const lua_CFunction searchers[] =
+  {searcher_preload, searcher_Lua, searcher_C, searcher_Croot, NULL};
 
 
 LUAMOD_API int luaopen_package (lua_State *L) {
@@ -621,15 +678,19 @@ LUAMOD_API int luaopen_package (lua_State *L) {
   lua_setfield(L, -2, "__gc");
   /* create `package' table */
   luaL_newlib(L, pk_funcs);
-  /* create `loaders' table */
-  lua_createtable(L, sizeof(loaders)/sizeof(loaders[0]) - 1, 0);
-  /* fill it with pre-defined loaders */
-  for (i=0; loaders[i] != NULL; i++) {
-    lua_pushvalue(L, -2);  /* set 'package' as upvalue for all loaders */
-    lua_pushcclosure(L, loaders[i], 1);
+  /* create 'searchers' table */
+  lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
+  /* 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);
   }
-  lua_setfield(L, -2, "loaders");  /* put it in field `loaders' */
+#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_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT);
   /* set field 'cpath' */
@@ -639,10 +700,10 @@ LUAMOD_API int luaopen_package (lua_State *L) {
                      LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
   lua_setfield(L, -2, "config");
   /* set field `loaded' */
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
   lua_setfield(L, -2, "loaded");
   /* set field `preload' */
-  luaL_findtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
   lua_setfield(L, -2, "preload");
   lua_pushglobaltable(L);
   lua_pushvalue(L, -2);  /* set 'package' as upvalue for next lib */

lobject.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 2.42 2010/10/29 11:13:14 roberto Exp roberto $
+** $Id: lobject.c,v 2.54 2011/11/30 12:44:26 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -33,7 +33,7 @@ LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT};
 ** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
 ** eeeee != 0 and (xxx) otherwise.
 */
-int luaO_int2fb (lu_int32 x) {
+int luaO_int2fb (unsigned int x) {
   int e = 0;  /* exponent */
   if (x < 8) return x;
   while (x >= 0x10) {
@@ -70,28 +70,6 @@ int luaO_ceillog2 (unsigned int x) {
 }
 
 
-int luaO_rawequalObj (const TValue *t1, const TValue *t2) {
-  if (ttype(t1) != ttype(t2)) return 0;
-  else switch (ttype(t1)) {
-    case LUA_TNIL:
-      return 1;
-    case LUA_TNUMBER:
-      return luai_numeq(nvalue(t1), nvalue(t2));
-    case LUA_TBOOLEAN:
-      return bvalue(t1) == bvalue(t2);  /* boolean true must be 1 !! */
-    case LUA_TLIGHTUSERDATA:
-      return pvalue(t1) == pvalue(t2);
-    case LUA_TSTRING:
-      return rawtsvalue(t1) == rawtsvalue(t2);
-    case LUA_TLCF:
-      return fvalue(t1) == fvalue(t2);
-    default:
-      lua_assert(iscollectable(t1));
-      return gcvalue(t1) == gcvalue(t2);
-  }
-}
-
-
 lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) {
   switch (op) {
     case LUA_OPADD: return luai_numadd(NULL, v1, v2);
@@ -106,19 +84,88 @@ lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) {
 }
 
 
-static int checkend (const char *s, const char *endptr) {
-  if (endptr == s) return 0;  /* no characters converted */
-  while (lisspace(cast(unsigned char, *endptr))) endptr++;
-  return (*endptr == '\0');  /* OK if no trailing characters */
+int luaO_hexavalue (int c) {
+  if (lisdigit(c)) return c - '0';
+  else return ltolower(c) - 'a' + 10;
 }
 
 
-int luaO_str2d (const char *s, lua_Number *result) {
+#if !defined(lua_strx2number)
+
+#include <math.h>
+
+
+static int isneg (const char **s) {
+  if (**s == '-') { (*s)++; return 1; }
+  else if (**s == '+') (*s)++;
+  return 0;
+}
+
+
+static lua_Number readhexa (const char **s, lua_Number r, int *count) {
+  for (; lisxdigit(cast_uchar(**s)); (*s)++) {  /* read integer part */
+    r = (r * 16.0) + cast_num(luaO_hexavalue(cast_uchar(**s)));
+    (*count)++;
+  }
+  return r;
+}
+
+
+/*
+** convert an hexadecimal numeric string to a number, following
+** C99 specification for 'strtod'
+*/
+static lua_Number lua_strx2number (const char *s, char **endptr) {
+  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') */
+  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 (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 */
+  if (*s == 'p' || *s == 'P') {  /* exponent part? */
+    int exp1 = 0;
+    int neg1;
+    s++;  /* skip 'p' */
+    neg1 = isneg(&s);  /* signal */
+    if (!lisdigit(cast_uchar(*s)))
+      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 */
+ ret:
+  if (neg) r = -r;
+  return ldexp(r, e);
+}
+
+#endif
+
+
+int luaO_str2d (const char *s, size_t len, lua_Number *result) {
   char *endptr;
-  *result = lua_str2number(s, &endptr);
-  if (checkend(s, endptr)) return 1;  /* conversion OK? */
-  *result = cast_num(strtoul(s, &endptr, 0)); /* try hexadecimal */
-  return checkend(s, endptr);
+  if (strpbrk(s, "nN"))  /* reject 'inf' and 'nan' */
+    return 0;
+  else if (strpbrk(s, "xX"))  /* hexa? */
+    *result = lua_strx2number(s, &endptr);
+  else
+    *result = lua_str2number(s, &endptr);
+  if (endptr == s) return 0;  /* nothing recognized */
+  while (lisspace(cast_uchar(*endptr))) endptr++;
+  return (endptr == s + len);  /* OK if no trailing characters */
 }
 
 
@@ -174,7 +221,6 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
         luaG_runerror(L,
             "invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"),
             *(e + 1));
-        break;
       }
     }
     n += 2;
@@ -196,19 +242,20 @@ const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
 }
 
 
+/* number of chars of a literal string without the ending \0 */
+#define LL(x)	(sizeof(x)/sizeof(char) - 1)
 
-#define LL(x)	(sizeof(x) - 1)
 #define RETS	"..."
 #define PRE	"[string \""
 #define POS	"\"]"
 
-#define addstr(a,b,l)	( memcpy(a,b,l), a += (l) )
+#define addstr(a,b,l)	( memcpy(a,b,(l) * sizeof(char)), a += (l) )
 
 void luaO_chunkid (char *out, const char *source, size_t bufflen) {
   size_t l = strlen(source);
   if (*source == '=') {  /* 'literal' source */
     if (l <= bufflen)  /* small enough? */
-      memcpy(out, source + 1, l);
+      memcpy(out, source + 1, l * sizeof(char));
     else {  /* truncate it */
       addstr(out, source + 1, bufflen - 1);
       *out = '\0';
@@ -216,11 +263,11 @@ void luaO_chunkid (char *out, const char *source, size_t bufflen) {
   }
   else if (*source == '@') {  /* file name */
     if (l <= bufflen)  /* small enough? */
-      memcpy(out, source + 1, l);
+      memcpy(out, source + 1, l * sizeof(char));
     else {  /* add '...' before rest of name */
       addstr(out, RETS, LL(RETS));
       bufflen -= LL(RETS);
-      memcpy(out, source + 1 + l - bufflen, bufflen);
+      memcpy(out, source + 1 + l - bufflen, bufflen * sizeof(char));
     }
   }
   else {  /* string; format as [string "source"] */
@@ -236,6 +283,7 @@ void luaO_chunkid (char *out, const char *source, size_t bufflen) {
       addstr(out, source, l);
       addstr(out, RETS, LL(RETS));
     }
-    memcpy(out, POS, LL(POS) + 1);
+    memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
   }
 }
+

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 2.41 2010/06/04 13:25:10 roberto Exp roberto $
+** $Id: lobject.h,v 2.63 2011/10/17 14:46:13 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -23,12 +23,38 @@
 #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_TUPVAL+2)
+
 
 /*
-** Variant tag for light C functions (negative to be considered
-** non collectable by 'iscollectable')
+** tags for Tagged Values have the following use of bits:
+** bits 0-3: actual tag (a LUA_T* value)
+** bits 4-5: variant bits
+** bit 6: whether value is collectable
 */
-#define LUA_TLCF	(~0x0F | LUA_TFUNCTION)
+
+/*
+** LUA_TFUNCTION variants:
+** 0 - Lua function
+** 1 - light C function
+** 2 - regular C function (closure)
+*/
+
+/* Variant tags for functions */
+#define LUA_TLCL	(LUA_TFUNCTION | (0 << 4))  /* Lua closure */
+#define LUA_TLCF	(LUA_TFUNCTION | (1 << 4))  /* light C function */
+#define LUA_TCCL	(LUA_TFUNCTION | (2 << 4))  /* C closure */
+
+
+/* Bit mark for collectable types */
+#define BIT_ISCOLLECTABLE	(1 << 6)
+
+/* mark a tag as collectable */
+#define ctb(t)			((t) | BIT_ISCOLLECTABLE)
+
 
 /*
 ** Union of all collectable objects
@@ -55,13 +81,10 @@ typedef struct GCheader {
 /*
 ** Union of all Lua values
 */
-typedef union {
-  GCObject *gc;    /* collectable objects */
-  void *p;         /* light userdata */
-  lua_Number n;    /* numbers */
-  int b;           /* booleans */
-  lua_CFunction f; /* light C functions */
-} Value;
+typedef union Value Value;
+
+
+#define numfield	lua_Number n;    /* numbers */
 
 
 
@@ -72,125 +95,145 @@ typedef union {
 
 #define TValuefields	Value value_; int tt_
 
-typedef struct lua_TValue {
-  TValuefields;
-} TValue;
+typedef struct lua_TValue TValue;
 
 
 /* macro defining a nil value */
-#define NILCONSTANT    {NULL}, LUA_TNIL
+#define NILCONSTANT	{NULL}, LUA_TNIL
 
 
-/*
-** type tag of a TValue
-*/
-#define ttype(o)	((o)->tt_)
+#define val_(o)		((o)->value_)
+#define num_(o)		(val_(o).n)
 
 
-/*
-** type tag of a TValue with no variants
-*/
-#define ttypenv(o)	(ttype(o) & 0x0F)
+/* raw type tag of a TValue */
+#define rttype(o)	((o)->tt_)
+
+/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
+#define ttype(o)	(rttype(o) & 0x3F)
+
+
+/* type tag of a TValue with no variants (bits 0-3) */
+#define ttypenv(o)	(rttype(o) & 0x0F)
 
 
 /* Macros to test type */
-#define ttisnil(o)	(ttype(o) == LUA_TNIL)
-#define ttisnumber(o)	(ttype(o) == LUA_TNUMBER)
-#define ttisstring(o)	(ttype(o) == LUA_TSTRING)
-#define ttistable(o)	(ttype(o) == LUA_TTABLE)
-#define ttisfunction(o)	(ttypenv(o) == LUA_TFUNCTION)
-#define ttisclosure(o)	(ttype(o) == LUA_TFUNCTION)
-#define ttislcf(o)	(ttype(o) == LUA_TLCF)
-#define ttisboolean(o)	(ttype(o) == LUA_TBOOLEAN)
-#define ttisuserdata(o)	(ttype(o) == LUA_TUSERDATA)
-#define ttisthread(o)	(ttype(o) == LUA_TTHREAD)
-#define ttislightuserdata(o)	(ttype(o) == LUA_TLIGHTUSERDATA)
-#define ttisdeadkey(o)	(ttype(o) == LUA_TDEADKEY)
+#define checktag(o,t)		(rttype(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)
+#define ttisstring(o)		checktag((o), ctb(LUA_TSTRING))
+#define ttistable(o)		checktag((o), ctb(LUA_TTABLE))
+#define ttisfunction(o)		(ttypenv(o) == LUA_TFUNCTION)
+#define ttisclosure(o)		((rttype(o) & 0x1F) == LUA_TFUNCTION)
+#define ttisCclosure(o)		checktag((o), ctb(LUA_TCCL))
+#define ttisLclosure(o)		checktag((o), ctb(LUA_TLCL))
+#define ttislcf(o)		checktag((o), LUA_TLCF)
+#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 gcvalue(o)	check_exp(iscollectable(o), (o)->value_.gc)
-#define pvalue(o)	check_exp(ttislightuserdata(o), (o)->value_.p)
-#define nvalue(o)	check_exp(ttisnumber(o), (o)->value_.n)
-#define rawtsvalue(o)	check_exp(ttisstring(o), &(o)->value_.gc->ts)
+#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 rawtsvalue(o)	check_exp(ttisstring(o), &val_(o).gc->ts)
 #define tsvalue(o)	(&rawtsvalue(o)->tsv)
-#define rawuvalue(o)	check_exp(ttisuserdata(o), &(o)->value_.gc->u)
+#define rawuvalue(o)	check_exp(ttisuserdata(o), &val_(o).gc->u)
 #define uvalue(o)	(&rawuvalue(o)->uv)
-#define clvalue(o)	check_exp(ttisclosure(o), &(o)->value_.gc->cl)
-#define fvalue(o)	check_exp(ttislcf(o), (o)->value_.f)
-#define hvalue(o)	check_exp(ttistable(o), &(o)->value_.gc->h)
-#define bvalue(o)	check_exp(ttisboolean(o), (o)->value_.b)
-#define thvalue(o)	check_exp(ttisthread(o), &(o)->value_.gc->th)
+#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), &val_(o).gc->h)
+#define bvalue(o)	check_exp(ttisboolean(o), val_(o).b)
+#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))
 
 #define l_isfalse(o)	(ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
 
 
-#define iscollectable(o)	(ttype(o) >= LUA_TSTRING)
+#define iscollectable(o)	(rttype(o) & BIT_ISCOLLECTABLE)
 
 
 /* Macros for internal tests */
-#define righttt(obj)		(ttype(obj) == gcvalue(obj)->gch.tt)
-
-#define checkconsistency(obj)	lua_assert(!iscollectable(obj) || righttt(obj))
+#define righttt(obj)		(ttypenv(obj) == gcvalue(obj)->gch.tt)
 
 #define checkliveness(g,obj) \
-  lua_assert(!iscollectable(obj) || (righttt(obj) && !isdead(g,gcvalue(obj))))
+	lua_longassert(!iscollectable(obj) || \
+			(righttt(obj) && !isdead(g,gcvalue(obj))))
 
 
 /* Macros to set values */
-#define setnilvalue(obj) ((obj)->tt_=LUA_TNIL)
+#define settt_(o,t)	((o)->tt_=(t))
 
 #define setnvalue(obj,x) \
-  { TValue *i_o=(obj); i_o->value_.n=(x); i_o->tt_=LUA_TNUMBER; }
+  { TValue *io=(obj); num_(io)=(x); settt_(io, LUA_TNUMBER); }
+
+#define changenvalue(o,x)	check_exp(ttisnumber(o), num_(o)=(x))
+
+#define setnilvalue(obj) settt_(obj, LUA_TNIL)
 
 #define setfvalue(obj,x) \
-  { TValue *i_o=(obj); i_o->value_.f=(x); i_o->tt_=LUA_TLCF; }
-
-#define changenvalue(o,x)  check_exp((o)->tt_==LUA_TNUMBER, (o)->value_.n=(x))
+  { TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_TLCF); }
 
 #define setpvalue(obj,x) \
-  { TValue *i_o=(obj); i_o->value_.p=(x); i_o->tt_=LUA_TLIGHTUSERDATA; }
+  { TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_TLIGHTUSERDATA); }
 
 #define setbvalue(obj,x) \
-  { TValue *i_o=(obj); i_o->value_.b=(x); i_o->tt_=LUA_TBOOLEAN; }
+  { 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(gch(i_g)->tt)); }
 
 #define setsvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TSTRING; \
-    checkliveness(G(L),i_o); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TSTRING)); \
+    checkliveness(G(L),io); }
 
 #define setuvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TUSERDATA; \
-    checkliveness(G(L),i_o); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TUSERDATA)); \
+    checkliveness(G(L),io); }
 
 #define setthvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TTHREAD; \
-    checkliveness(G(L),i_o); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTHREAD)); \
+    checkliveness(G(L),io); }
 
-#define setclvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TFUNCTION; \
-    checkliveness(G(L),i_o); }
+#define setclLvalue(L,obj,x) \
+  { 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); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TCCL)); \
+    checkliveness(G(L),io); }
 
 #define sethvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TTABLE; \
-    checkliveness(G(L),i_o); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTABLE)); \
+    checkliveness(G(L),io); }
 
 #define setptvalue(L,obj,x) \
-  { TValue *i_o=(obj); \
-    i_o->value_.gc=cast(GCObject *, (x)); i_o->tt_=LUA_TPROTO; \
-    checkliveness(G(L),i_o); }
+  { TValue *io=(obj); \
+    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TPROTO)); \
+    checkliveness(G(L),io); }
 
-#define setdeadvalue(obj)	((obj)->tt_=LUA_TDEADKEY)
+#define setdeadvalue(obj)	settt_(obj, LUA_TDEADKEY)
 
 
 
 #define setobj(L,obj1,obj2) \
-	{ const TValue *o2=(obj2); TValue *o1=(obj1); \
-	  o1->value_ = o2->value_; o1->tt_=o2->tt_; \
-	  checkliveness(G(L),o1); }
+	{ const TValue *io2=(obj2); TValue *io1=(obj1); \
+	  io1->value_ = io2->value_; io1->tt_ = io2->tt_; \
+	  checkliveness(G(L),io1); }
 
 
 /*
@@ -214,9 +257,143 @@ typedef struct lua_TValue {
 
 
 
+
+/*
+** {======================================================
+** NaN Trick
+** =======================================================
+*/
+
+#if defined(LUA_NANTRICK) \
+ || defined(LUA_NANTRICK_LE) \
+ || defined(LUA_NANTRICK_BE)
+
+/*
+** 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')
+*/
+#if !defined(NNMARK)
+#define NNMARK		0x7FF7A500
+#define NNMASK		0x7FFFFF00
+#endif
+
+#undef TValuefields
+#undef NILCONSTANT
+
+#if defined(LUA_NANTRICK_LE)
+
+/* 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__)
+
+#elif defined(LUA_NANTRICK_BE)
+
+/* 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__)
+
+#elif !defined(TValuefields)
+#error option 'LUA_NANTRICK' needs declaration for 'TValuefields'
+
+#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
+#define checktag(o,t)	(tt_(o) == tag2tt(t))
+
+#undef ttisequal
+#define ttisequal(o1,o2)  \
+	(ttisnumber(o1) ? ttisnumber(o2) : (tt_(o1) == tt_(o2)))
+
+
+
+#define luai_checknum(L,o,c)	{ if (!ttisnumber(o)) c; }
+
+
+#else
+
+#define luai_checknum(L,o,c)	{ /* empty */ }
+
+#endif
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** types and prototypes
+** =======================================================
+*/
+
+
+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 */
 
 
+
+
 /*
 ** Header for string value; string bytes follow the end of this structure
 */
@@ -226,7 +403,7 @@ typedef union TString {
     CommonHeader;
     lu_byte reserved;
     unsigned int hash;
-    size_t len;
+    size_t len;  /* number of characters in string */
   } tsv;
 } TString;
 
@@ -247,7 +424,7 @@ typedef union Udata {
     CommonHeader;
     struct Table *metatable;
     struct Table *env;
-    size_t len;
+    size_t len;  /* number of bytes */
   } uv;
 } Udata;
 
@@ -282,11 +459,11 @@ typedef struct Proto {
   TValue *k;  /* constants used by the function */
   Instruction *code;
   struct Proto **p;  /* functions defined inside the function */
-  int *lineinfo;  /* map from opcodes to source lines */
-  LocVar *locvars;  /* information about local variables */
+  int *lineinfo;  /* map from opcodes to source lines (debug information) */
+  LocVar *locvars;  /* information about local variables (debug information) */
   Upvaldesc *upvalues;  /* upvalue information */
   union Closure *cache;  /* last created closure with this prototype */
-  TString  *source;
+  TString  *source;  /* used for debug information */
   int sizeupvalues;  /* size of 'upvalues' */
   int sizek;  /* size of `k' */
   int sizecode;
@@ -346,9 +523,9 @@ typedef union Closure {
 } Closure;
 
 
-#define isLfunction(o)	(ttisclosure(o) && !clvalue(o)->c.isC)
+#define isLfunction(o)	ttisLclosure(o)
 
-#define getproto(o)	(clvalue(o)->l.p)
+#define getproto(o)	(clLvalue(o)->p)
 
 
 /*
@@ -403,12 +580,13 @@ typedef struct Table {
 
 LUAI_DDEC const TValue luaO_nilobject_;
 
+
 LUAI_FUNC int luaO_int2fb (unsigned int x);
 LUAI_FUNC int luaO_fb2int (int x);
-LUAI_FUNC int luaO_ceillog2 (lu_int32 x);
+LUAI_FUNC int luaO_ceillog2 (unsigned int x);
 LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2);
-LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
-LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
+LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result);
+LUAI_FUNC int luaO_hexavalue (int c);
 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

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.c,v 1.43 2010/03/12 19:14:06 roberto Exp roberto $
+** $Id: lopcodes.c,v 1.47 2011/04/12 17:27:35 roberto Exp roberto $
 ** See Copyright Notice in lua.h
 */
 
@@ -16,6 +16,7 @@
 LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
   "MOVE",
   "LOADK",
+  "LOADKX",
   "LOADBOOL",
   "LOADNIL",
   "GETUPVAL",
@@ -50,7 +51,6 @@ LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
   "TFORCALL",
   "TFORLOOP",
   "SETLIST",
-  "CLOSE",
   "CLOSURE",
   "VARARG",
   "EXTRAARG",
@@ -64,8 +64,9 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
 /*       T  A    B       C     mode		   opcode	*/
   opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_MOVE */
  ,opmode(0, 1, OpArgK, OpArgN, iABx)		/* OP_LOADK */
+ ,opmode(0, 1, OpArgN, OpArgN, iABx)		/* OP_LOADKX */
  ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_LOADBOOL */
- ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LOADNIL */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_LOADNIL */
  ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_GETUPVAL */
  ,opmode(0, 1, OpArgU, OpArgK, iABC)		/* OP_GETTABUP */
  ,opmode(0, 1, OpArgR, OpArgK, iABC)		/* OP_GETTABLE */
@@ -88,7 +89,7 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
  ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_EQ */
  ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LT */
  ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LE */
- ,opmode(1, 1, OpArgR, OpArgU, iABC)		/* OP_TEST */
+ ,opmode(1, 0, OpArgN, OpArgU, iABC)		/* OP_TEST */
  ,opmode(1, 1, OpArgR, OpArgU, iABC)		/* OP_TESTSET */
  ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_CALL */
  ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_TAILCALL */
@@ -98,7 +99,6 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
  ,opmode(0, 0, OpArgN, OpArgU, iABC)		/* OP_TFORCALL */
  ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_TFORLOOP */
  ,opmode(0, 0, OpArgU, OpArgU, iABC)		/* OP_SETLIST */
- ,opmode(0, 0, OpArgN, OpArgN, iABC)		/* OP_CLOSE */
  ,opmode(0, 1, OpArgU, OpArgN, iABx)		/* OP_CLOSURE */
  ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_VARARG */
  ,opmode(0, 0, OpArgU, OpArgU, iAx)		/* OP_EXTRAARG */

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.136 2010/10/13 16:45:54 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.141 2011/04/19 16:22:13 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -167,9 +167,10 @@ typedef enum {
 name		args	description
 ------------------------------------------------------------------------*/
 OP_MOVE,/*	A B	R(A) := R(B)					*/
-OP_LOADK,/*	A Bx	R(A) := Kst(Bx - 1)				*/
+OP_LOADK,/*	A Bx	R(A) := Kst(Bx)					*/
+OP_LOADKX,/*	A 	R(A) := Kst(extra arg)				*/
 OP_LOADBOOL,/*	A B C	R(A) := (Bool)B; if (C) pc++			*/
-OP_LOADNIL,/*	A B	R(A) := ... := R(B) := nil			*/
+OP_LOADNIL,/*	A B	R(A), R(A+1), ..., R(A+B) := nil		*/
 OP_GETUPVAL,/*	A B	R(A) := UpValue[B]				*/
 
 OP_GETTABUP,/*	A B C	R(A) := UpValue[B][RK(C)]			*/
@@ -195,8 +196,7 @@ OP_LEN,/*	A B	R(A) := length of R(B)				*/
 
 OP_CONCAT,/*	A B C	R(A) := R(B).. ... ..R(C)			*/
 
-OP_JMP,/*	sBx	pc+=sBx					*/
-
+OP_JMP,/*	A sBx	pc+=sBx; if (A) close all upvalues >= R(A) + 1	*/
 OP_EQ,/*	A B C	if ((RK(B) == RK(C)) ~= A) then pc++		*/
 OP_LT,/*	A B C	if ((RK(B) <  RK(C)) ~= A) then pc++		*/
 OP_LE,/*	A B C	if ((RK(B) <= RK(C)) ~= A) then pc++		*/
@@ -217,7 +217,6 @@ OP_TFORLOOP,/*	A sBx	if R(A+1) ~= nil then { R(A)=R(A+1); pc += sBx }*/
 
 OP_SETLIST,/*	A B C	R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B	*/
 
-OP_CLOSE,/*	A	close all variables in the stack up to (>=) R(A)*/
 OP_CLOSURE,/*	A Bx	R(A) := closure(KPROTO[Bx])			*/
 
 OP_VARARG,/*	A B	R(A), R(A+1), ..., R(A+B-2) = vararg		*/
@@ -244,7 +243,7 @@ OP_EXTRAARG/*	Ax	extra (larger) argument for previous opcode	*/
   (*) In OP_SETLIST, if (B == 0) then B = `top'; if (C == 0) then next
   'instruction' is EXTRAARG(real C).
 
-  (*) In OP_LOADK, if (Bx == 0) then next 'instruction' is EXTRAARG(real Bx).
+  (*) In OP_LOADKX, the next 'instruction' is always EXTRAARG.
 
   (*) For comparisons, A specifies what condition the test should accept
   (true or false).

loslib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c,v 1.31 2010/07/02 12:01:53 roberto Exp roberto $
+** $Id: loslib.c,v 1.37 2011/11/29 17:15:42 roberto Exp roberto $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -21,7 +21,7 @@
 
 
 /*
-** list of valid conversion specifiers @* for the 'strftime' function
+** list of valid conversion specifiers for the 'strftime' function
 */
 #if !defined(LUA_STRFTIMEOPTIONS)
 
@@ -58,38 +58,46 @@
 #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
 
-static int os_pushresult (lua_State *L, int i, const char *filename) {
-  int en = errno;  /* calls to Lua API may change this value */
-  if (i) {
-    lua_pushboolean(L, 1);
-    return 1;
-  }
-  else {
-    lua_pushnil(L);
-    lua_pushfstring(L, "%s: %s", filename, strerror(en));
-    lua_pushinteger(L, en);
-    return 3;
-  }
-}
 
 
 static int os_execute (lua_State *L) {
-  lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
-  return 1;
+  const char *cmd = luaL_optstring(L, 1, NULL);
+  int stat = system(cmd);
+  if (cmd != NULL)
+    return luaL_execresult(L, stat);
+  else {
+    lua_pushboolean(L, stat);  /* true if there is a shell */
+    return 1;
+  }
 }
 
 
 static int os_remove (lua_State *L) {
   const char *filename = luaL_checkstring(L, 1);
-  return os_pushresult(L, remove(filename) == 0, filename);
+  return luaL_fileresult(L, remove(filename) == 0, filename);
 }
 
 
 static int os_rename (lua_State *L) {
   const char *fromname = luaL_checkstring(L, 1);
   const char *toname = luaL_checkstring(L, 2);
-  return os_pushresult(L, rename(fromname, toname) == 0, fromname);
+  return luaL_fileresult(L, rename(fromname, toname) == 0, fromname);
 }
 
 
@@ -182,17 +190,17 @@ static const char *checkoption (lua_State *L, const char *conv, char *buff) {
   return conv;  /* to avoid warnings */
 }
 
-    
+
 static int os_date (lua_State *L) {
   const char *s = luaL_optstring(L, 1, "%c");
   time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
-  struct tm *stm;
+  struct tm tmr, *stm;
   if (*s == '!') {  /* UTC? */
-    stm = gmtime(&t);
+    stm = l_gmtime(&t, &tmr);
     s++;  /* skip `!' */
   }
   else
-    stm = localtime(&t);
+    stm = l_localtime(&t, &tmr);
   if (stm == NULL)  /* invalid date? */
     lua_pushnil(L);
   else if (strcmp(s, "*t") == 0) {
@@ -283,7 +291,8 @@ static int os_exit (lua_State *L) {
     status = luaL_optint(L, 1, EXIT_SUCCESS);
   if (lua_toboolean(L, 2))
     lua_close(L);
-  exit(status);
+  if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */
+  return 0;
 }
 
 

lparser.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.91 2010/08/23 17:32:34 roberto Exp roberto $
+** $Id: lparser.c,v 2.123 2011/11/30 12:43:51 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -41,10 +41,11 @@
 */
 typedef struct BlockCnt {
   struct BlockCnt *previous;  /* chain */
-  int breaklist;  /* list of jumps out of this loop */
-  lu_byte nactvar;  /* # active locals outside the breakable structure */
+  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 isbreakable;  /* true if `block' is a loop */
+  lu_byte isloop;  /* true if `block' is a loop */
 } BlockCnt;
 
 
@@ -52,7 +53,7 @@ typedef struct BlockCnt {
 /*
 ** prototypes for recursive non-terminal functions
 */
-static void chunk (LexState *ls);
+static void statement (LexState *ls);
 static void expr (LexState *ls, expdesc *v);
 
 
@@ -66,20 +67,28 @@ static void anchor_token (LexState *ls) {
 }
 
 
-static void error_expected (LexState *ls, int token) {
+/* semantic error */
+static l_noret semerror (LexState *ls, const char *msg) {
+  ls->t.token = 0;  /* remove 'near to' from final message */
+  luaX_syntaxerror(ls, msg);
+}
+
+
+static l_noret error_expected (LexState *ls, int token) {
   luaX_syntaxerror(ls,
       luaO_pushfstring(ls->L, "%s expected", luaX_token2str(ls, token)));
 }
 
 
-static void errorlimit (FuncState *fs, int limit, const char *what) {
+static l_noret errorlimit (FuncState *fs, int limit, const char *what) {
+  lua_State *L = fs->ls->L;
   const char *msg;
   int line = fs->f->linedefined;
   const char *where = (line == 0)
                       ? "main function"
-                      : luaO_pushfstring(fs->L, "function at line %d", line);
-  msg = luaO_pushfstring(fs->L, "too many %s (limit is %d) in %s",
-                                what, limit, where);
+                      : luaO_pushfstring(L, "function at line %d", line);
+  msg = luaO_pushfstring(L, "too many %s (limit is %d) in %s",
+                             what, limit, where);
   luaX_syntaxerror(fs->ls, msg);
 }
 
@@ -103,6 +112,7 @@ static void check (LexState *ls, int c) {
     error_expected(ls, c);
 }
 
+
 static void checknext (LexState *ls, int c) {
   check(ls, c);
   luaX_next(ls);
@@ -167,13 +177,13 @@ static int registerlocalvar (LexState *ls, TString *varname) {
 
 static void new_localvar (LexState *ls, TString *name) {
   FuncState *fs = ls->fs;
-  Varlist *vl = ls->varl;
+  Dyndata *dyd = ls->dyd;
   int reg = registerlocalvar(ls, name);
-  checklimit(fs, vl->nactvar + 1 - fs->firstlocal,
+  checklimit(fs, dyd->actvar.n + 1 - fs->firstlocal,
                   MAXVARS, "local variables");
-  luaM_growvector(ls->L, vl->actvar, vl->nactvar + 1,
-                  vl->actvarsize, vardesc, MAX_INT, "local variables");
-  vl->actvar[vl->nactvar++].idx = cast(unsigned short, reg);
+  luaM_growvector(ls->L, dyd->actvar.arr, dyd->actvar.n + 1,
+                  dyd->actvar.size, Vardesc, MAX_INT, "local variables");
+  dyd->actvar.arr[dyd->actvar.n++].idx = cast(short, reg);
 }
 
 
@@ -186,7 +196,7 @@ static void new_localvarliteral_ (LexState *ls, const char *name, size_t sz) {
 
 
 static LocVar *getlocvar (FuncState *fs, int i) {
-  int idx = fs->ls->varl->actvar[fs->firstlocal + i].idx;
+  int idx = fs->ls->dyd->actvar.arr[fs->firstlocal + i].idx;
   lua_assert(idx < fs->nlocvars);
   return &fs->f->locvars[idx];
 }
@@ -202,7 +212,7 @@ static void adjustlocalvars (LexState *ls, int nvars) {
 
 
 static void removevars (FuncState *fs, int tolevel) {
-  fs->ls->varl->nactvar -= (fs->nactvar - tolevel);
+  fs->ls->dyd->actvar.n -= (fs->nactvar - tolevel);
   while (fs->nactvar > tolevel)
     getlocvar(fs, --fs->nactvar)->endpc = fs->pc;
 }
@@ -222,13 +232,13 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
   Proto *f = fs->f;
   int oldsize = f->sizeupvalues;
   checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues");
-  luaM_growvector(fs->L, f->upvalues, fs->nups, f->sizeupvalues,
+  luaM_growvector(fs->ls->L, f->upvalues, fs->nups, f->sizeupvalues,
                   Upvaldesc, MAXUPVAL, "upvalues");
   while (oldsize < f->sizeupvalues) f->upvalues[oldsize++].name = NULL;
   f->upvalues[fs->nups].instack = (v->k == VLOCAL);
   f->upvalues[fs->nups].idx = cast_byte(v->u.info);
   f->upvalues[fs->nups].name = name;
-  luaC_objbarrier(fs->L, f, name);
+  luaC_objbarrier(fs->ls->L, f, name);
   return fs->nups++;
 }
 
@@ -245,12 +255,12 @@ static int searchvar (FuncState *fs, TString *n) {
 
 /*
   Mark block where variable at given level was defined
-  (to emit OP_CLOSE later).
+  (to emit close instructions later).
 */
 static void markupval (FuncState *fs, int level) {
   BlockCnt *bl = fs->bl;
-  while (bl && bl->nactvar > level) bl = bl->previous;
-  if (bl) bl->upval = 1;
+  while (bl->nactvar > level) bl = bl->previous;
+  bl->upval = 1;
 }
 
 
@@ -318,19 +328,118 @@ static void adjust_assign (LexState *ls, int nvars, int nexps, expdesc *e) {
 
 
 static void enterlevel (LexState *ls) {
-  global_State *g = G(ls->L);
-  ++g->nCcalls;
-  checklimit(ls->fs, g->nCcalls, LUAI_MAXCCALLS, "syntax levels");
+  lua_State *L = ls->L;
+  ++L->nCcalls;
+  checklimit(ls->fs, L->nCcalls, LUAI_MAXCCALLS, "C levels");
 }
 
 
-#define leavelevel(ls)	(G((ls)->L)->nCcalls--)
+#define leavelevel(ls)	((ls)->L->nCcalls--)
 
 
-static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isbreakable) {
-  bl->breaklist = NO_JUMP;
-  bl->isbreakable = isbreakable;
+static void closegoto (LexState *ls, int g, Labeldesc *label) {
+  int i;
+  FuncState *fs = ls->fs;
+  Labellist *gl = &ls->dyd->gt;
+  Labeldesc *gt = &gl->arr[g];
+  lua_assert(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 " LUA_QS,
+      getstr(gt->name), gt->line, getstr(vname));
+    semerror(ls, msg);
+  }
+  luaK_patchlist(fs, gt->pc, label->pc);
+  /* remove goto from pending list */
+  for (i = g; i < gl->n - 1; i++)
+    gl->arr[i] = gl->arr[i + 1];
+  gl->n--;
+}
+
+
+/*
+** try to close a goto with existing labels; this solves backward jumps
+*/
+static int findlabel (LexState *ls, int g) {
+  int i;
+  BlockCnt *bl = ls->fs->bl;
+  Dyndata *dyd = ls->dyd;
+  Labeldesc *gt = &dyd->gt.arr[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 (gt->nactvar > lb->nactvar &&
+          (bl->upval || dyd->label.n > bl->firstlabel))
+        luaK_patchclose(ls->fs, gt->pc, lb->nactvar);
+      closegoto(ls, g, lb);  /* close it */
+      return 1;
+    }
+  }
+  return 0;  /* label not found; cannot close goto */
+}
+
+
+static int newlabelentry (LexState *ls, Labellist *l, TString *name,
+                          int line, int pc) {
+  int n = l->n;
+  luaM_growvector(ls->L, l->arr, n, l->size,
+                  Labeldesc, SHRT_MAX, "labels/gotos");
+  l->arr[n].name = name;
+  l->arr[n].line = line;
+  l->arr[n].nactvar = ls->fs->nactvar;
+  l->arr[n].pc = pc;
+  l->n++;
+  return n;
+}
+
+
+/*
+** check whether new label 'lb' matches any pending gotos in current
+** block; solves forward jumps
+*/
+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))
+      closegoto(ls, i, lb);
+    else
+      i++;
+  }
+}
+
+
+/*
+** "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.
+*/
+static void movegotosout (FuncState *fs, BlockCnt *bl) {
+  int i = bl->firstgoto;
+  Labellist *gl = &fs->ls->dyd->gt;
+  /* correct pending gotos to current block and try to close it
+     with visible labels */
+  while (i < gl->n) {
+    Labeldesc *gt = &gl->arr[i];
+    if (gt->nactvar > bl->nactvar) {
+      if (bl->upval)
+        luaK_patchclose(fs, gt->pc, bl->nactvar);
+      gt->nactvar = bl->nactvar;
+    }
+    if (!findlabel(fs->ls, i))
+      i++;  /* move to next one */
+  }
+}
+
+
+static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isloop) {
+  bl->isloop = isloop;
   bl->nactvar = fs->nactvar;
+  bl->firstlabel = fs->ls->dyd->label.n;
+  bl->firstgoto = fs->ls->dyd->gt.n;
   bl->upval = 0;
   bl->previous = fs->bl;
   fs->bl = bl;
@@ -338,17 +447,48 @@ static void enterblock (FuncState *fs, BlockCnt *bl, lu_byte isbreakable) {
 }
 
 
+/*
+** create a label named "break" to resolve break statements
+*/
+static void breaklabel (LexState *ls) {
+  TString *n = luaS_new(ls->L, "break");
+  int l = newlabelentry(ls, &ls->dyd->label, n, 0, ls->fs->pc);
+  findgotos(ls, &ls->dyd->label.arr[l]);
+}
+
+/*
+** generates an error for an undefined 'goto'; choose appropriate
+** message when label name is a reserved word (which can only be 'break')
+*/
+static l_noret undefgoto (LexState *ls, Labeldesc *gt) {
+  const char *msg = (gt->name->tsv.reserved > 0)
+                    ? "<%s> at line %d not inside a loop"
+                    : "no visible label " LUA_QS " for <goto> at line %d";
+  msg = luaO_pushfstring(ls->L, msg, getstr(gt->name), gt->line);
+  semerror(ls, msg);
+}
+
+
 static void leaveblock (FuncState *fs) {
   BlockCnt *bl = fs->bl;
+  LexState *ls = fs->ls;
+  if (bl->previous && bl->upval) {
+    /* create a 'jump to here' to close upvalues */
+    int j = luaK_jump(fs);
+    luaK_patchclose(fs, j, bl->nactvar);
+    luaK_patchtohere(fs, j);
+  }
+  if (bl->isloop)
+    breaklabel(ls);  /* close pending breaks */
   fs->bl = bl->previous;
   removevars(fs, bl->nactvar);
-  if (bl->upval)
-    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
-  /* a block either controls scope or breaks (never both) */
-  lua_assert(!bl->isbreakable || !bl->upval);
   lua_assert(bl->nactvar == fs->nactvar);
   fs->freereg = fs->nactvar;  /* free registers */
-  luaK_patchtohere(fs, bl->breaklist);
+  ls->dyd->label.n = bl->firstlabel;  /* remove local labels */
+  if (bl->previous)  /* inner block? */
+    movegotosout(fs, bl);  /* update pending gotos to outer block */
+  else if (bl->firstgoto < ls->dyd->gt.n)  /* pending gotos in outer block? */
+    undefgoto(ls, &ls->dyd->gt.arr[bl->firstgoto]);  /* error */
 }
 
 
@@ -368,15 +508,15 @@ static void codeclosure (LexState *ls, Proto *clp, expdesc *v) {
   f->p[fs->np++] = clp;
   luaC_objbarrier(ls->L, f, clp);
   init_exp(v, VRELOCABLE, luaK_codeABx(fs, OP_CLOSURE, 0, fs->np-1));
+  luaK_exp2nextreg(fs, v);  /* fix it at stack top (for GC) */
 }
 
 
-static void open_func (LexState *ls, FuncState *fs) {
+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;
-  fs->L = L;
   ls->fs = fs;
   fs->pc = 0;
   fs->lasttarget = 0;
@@ -387,7 +527,7 @@ static void open_func (LexState *ls, FuncState *fs) {
   fs->nups = 0;
   fs->nlocvars = 0;
   fs->nactvar = 0;
-  fs->firstlocal = ls->varl->nactvar;
+  fs->firstlocal = ls->dyd->actvar.n;
   fs->bl = NULL;
   f = luaF_newproto(L);
   fs->f = f;
@@ -400,6 +540,7 @@ static void open_func (LexState *ls, FuncState *fs) {
   /* anchor table of constants (to avoid being collected) */
   sethvalue2s(L, L->top, fs->h);
   incr_top(L);
+  enterblock(fs, bl, 0);
 }
 
 
@@ -408,7 +549,7 @@ static void close_func (LexState *ls) {
   FuncState *fs = ls->fs;
   Proto *f = fs->f;
   luaK_ret(fs, 0, 0);  /* final return */
-  removevars(fs, 0);
+  leaveblock(fs);
   luaM_reallocvector(L, f->code, f->sizecode, fs->pc, Instruction);
   f->sizecode = fs->pc;
   luaM_reallocvector(L, f->lineinfo, f->sizelineinfo, fs->pc, int);
@@ -435,42 +576,49 @@ static void close_func (LexState *ls) {
 ** opens the main function, which is a regular vararg function with an
 ** upvalue named LUA_ENV
 */
-static void open_mainfunc (LexState *ls, FuncState *fs) {
+static void open_mainfunc (LexState *ls, FuncState *fs, BlockCnt *bl) {
   expdesc v;
-  open_func(ls, fs);
+  open_func(ls, fs, bl);
   fs->f->is_vararg = 1;  /* main function is always vararg */
   init_exp(&v, VLOCAL, 0);
   newupvalue(fs, ls->envn, &v);  /* create environment upvalue */
 }
 
 
-Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, Varlist *varl,
-                    const char *name) {
-  LexState lexstate;
-  FuncState funcstate;
-  TString *tname = luaS_new(L, name);
-  setsvalue2s(L, L->top, tname);  /* push name to protect it */
-  incr_top(L);
-  lexstate.buff = buff;
-  lexstate.varl = varl;
-  luaX_setinput(L, &lexstate, z, tname);
-  open_mainfunc(&lexstate, &funcstate);
-  luaX_next(&lexstate);  /* read first token */
-  chunk(&lexstate);  /* read main chunk */
-  check(&lexstate, TK_EOS);
-  close_func(&lexstate);
-  L->top--;  /* pop name */
-  lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs);
-  return funcstate.f;
-}
-
-
 
 /*============================================================*/
 /* GRAMMAR RULES */
 /*============================================================*/
 
 
+/*
+** check whether current token is in the follow set of a block.
+** 'until' closes syntactical blocks, but do not close scope,
+** so it handled in separate.
+*/
+static int block_follow (LexState *ls, int withuntil) {
+  switch (ls->t.token) {
+    case TK_ELSE: case TK_ELSEIF:
+    case TK_END: case TK_EOS:
+      return 1;
+    case TK_UNTIL: return withuntil;
+    default: return 0;
+  }
+}
+
+
+static void statlist (LexState *ls) {
+  /* statlist -> { stat [`;'] } */
+  while (!block_follow(ls, 1)) {
+    if (ls->t.token == TK_RETURN) {
+      statement(ls);
+      return;  /* 'return' must be last statement */
+    }
+    statement(ls);
+  }
+}
+
+
 static void fieldsel (LexState *ls, expdesc *v) {
   /* fieldsel -> ['.' | ':'] NAME */
   FuncState *fs = ls->fs;
@@ -586,7 +734,7 @@ static void field (LexState *ls, struct ConsControl *cc) {
 
 
 static void constructor (LexState *ls, expdesc *t) {
-  /* constructor -> '{' [ field { sep field } [sep] ] '}' 
+  /* constructor -> '{' [ field { sep field } [sep] ] '}'
      sep -> ',' | ';' */
   FuncState *fs = ls->fs;
   int line = ls->linenumber;
@@ -596,7 +744,7 @@ static void constructor (LexState *ls, expdesc *t) {
   cc.t = t;
   init_exp(t, VRELOCABLE, pc);
   init_exp(&cc.v, VVOID, 0);  /* no value (yet) */
-  luaK_exp2nextreg(ls->fs, t);  /* fix it at stack top (for gc) */
+  luaK_exp2nextreg(ls->fs, t);  /* fix it at stack top */
   checknext(ls, '{');
   do {
     lua_assert(cc.v.k == VVOID || cc.tostore > 0);
@@ -643,19 +791,20 @@ static void parlist (LexState *ls) {
 }
 
 
-static void body (LexState *ls, expdesc *e, int needself, int line) {
-  /* body ->  `(' parlist `)' chunk END */
+static void body (LexState *ls, expdesc *e, int ismethod, int line) {
+  /* body ->  `(' parlist `)' block END */
   FuncState new_fs;
-  open_func(ls, &new_fs);
+  BlockCnt bl;
+  open_func(ls, &new_fs, &bl);
   new_fs.f->linedefined = line;
   checknext(ls, '(');
-  if (needself) {
-    new_localvarliteral(ls, "self");
+  if (ismethod) {
+    new_localvarliteral(ls, "self");  /* create 'self' parameter */
     adjustlocalvars(ls, 1);
   }
   parlist(ls);
   checknext(ls, ')');
-  chunk(ls);
+  statlist(ls);
   new_fs.f->lastlinedefined = ls->linenumber;
   check_match(ls, TK_END, TK_FUNCTION, line);
   codeclosure(ls, new_fs.f, e);
@@ -663,8 +812,8 @@ static void body (LexState *ls, expdesc *e, int needself, int line) {
 }
 
 
-static int explist1 (LexState *ls, expdesc *v) {
-  /* explist1 -> expr { `,' expr } */
+static int explist (LexState *ls, expdesc *v) {
+  /* explist -> expr { `,' expr } */
   int n = 1;  /* at least one expression */
   expr(ls, v);
   while (testnext(ls, ',')) {
@@ -681,12 +830,12 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
   expdesc args;
   int base, nparams;
   switch (ls->t.token) {
-    case '(': {  /* funcargs -> `(' [ explist1 ] `)' */
+    case '(': {  /* funcargs -> `(' [ explist ] `)' */
       luaX_next(ls);
       if (ls->t.token == ')')  /* arg list is empty? */
         args.k = VVOID;
       else {
-        explist1(ls, &args);
+        explist(ls, &args);
         luaK_setmultret(fs, &args);
       }
       check_match(ls, ')', '(', line);
@@ -703,7 +852,6 @@ static void funcargs (LexState *ls, expdesc *f, int line) {
     }
     default: {
       luaX_syntaxerror(ls, "function arguments expected");
-      return;
     }
   }
   lua_assert(f->k == VNONRELOC);
@@ -748,7 +896,6 @@ static void prefixexp (LexState *ls, expdesc *v) {
     }
     default: {
       luaX_syntaxerror(ls, "unexpected symbol");
-      return;
     }
   }
 }
@@ -892,7 +1039,7 @@ static const struct {
 ** subexpr -> (simpleexp | unop subexpr) { binop subexpr }
 ** where `binop' is any binary operator with a priority higher than `limit'
 */
-static BinOpr subexpr (LexState *ls, expdesc *v, unsigned int limit) {
+static BinOpr subexpr (LexState *ls, expdesc *v, int limit) {
   BinOpr op;
   UnOpr uop;
   enterlevel(ls);
@@ -937,23 +1084,12 @@ static void expr (LexState *ls, expdesc *v) {
 */
 
 
-static int block_follow (int token) {
-  switch (token) {
-    case TK_ELSE: case TK_ELSEIF: case TK_END:
-    case TK_UNTIL: case TK_EOS:
-      return 1;
-    default: return 0;
-  }
-}
-
-
 static void block (LexState *ls) {
-  /* block -> chunk */
+  /* block -> statlist */
   FuncState *fs = ls->fs;
   BlockCnt bl;
   enterblock(fs, &bl, 0);
-  chunk(ls);
-  lua_assert(bl.breaklist == NO_JUMP);
+  statlist(ls);
   leaveblock(fs);
 }
 
@@ -969,31 +1105,34 @@ struct LHS_assign {
 
 
 /*
-** check whether, in an assignment to a local variable, the local variable
-** is needed in a previous assignment (to a table). If so, save original
-** local value in a safe place and use this safe copy in the previous
-** assignment.
+** check whether, in an assignment to an upvalue/local variable, the
+** upvalue/local variable is begin used in a previous assignment to a
+** table. If so, save original upvalue/local value in a safe place and
+** use this safe copy in the previous assignment.
 */
 static void check_conflict (LexState *ls, struct LHS_assign *lh, expdesc *v) {
   FuncState *fs = ls->fs;
   int extra = fs->freereg;  /* eventual position to save local variable */
   int conflict = 0;
-  for (; lh; lh = lh->prev) {
-    /* conflict in table 't'? */
-    if (lh->v.u.ind.vt == v->k && lh->v.u.ind.t == v->u.info) {
-      conflict = 1;
-      lh->v.u.ind.vt = VLOCAL;
-      lh->v.u.ind.t = extra;  /* previous assignment will use safe copy */
-    }
-    /* conflict in index 'idx'? */
-    if (v->k == VLOCAL && lh->v.u.ind.idx == v->u.info) {
-      conflict = 1;
-      lh->v.u.ind.idx = extra;  /* previous assignment will use safe copy */
+  for (; lh; lh = lh->prev) {  /* check all previous assignments */
+    if (lh->v.k == VINDEXED) {  /* assigning to a table? */
+      /* table is the upvalue/local being assigned now? */
+      if (lh->v.u.ind.vt == v->k && lh->v.u.ind.t == v->u.info) {
+        conflict = 1;
+        lh->v.u.ind.vt = VLOCAL;
+        lh->v.u.ind.t = extra;  /* previous assignment will use safe copy */
+      }
+      /* index is the local being assigned? (index cannot be upvalue) */
+      if (v->k == VLOCAL && lh->v.u.ind.idx == v->u.info) {
+        conflict = 1;
+        lh->v.u.ind.idx = extra;  /* previous assignment will use safe copy */
+      }
     }
   }
   if (conflict) {
+    /* copy upvalue/local value to a temporary (in position 'extra') */
     OpCode op = (v->k == VLOCAL) ? OP_MOVE : OP_GETUPVAL;
-    luaK_codeABC(fs, op, fs->freereg, v->u.info, 0);  /* make copy */
+    luaK_codeABC(fs, op, extra, v->u.info, 0);
     luaK_reserveregs(fs, 1);
   }
 }
@@ -1008,14 +1147,14 @@ static void assignment (LexState *ls, struct LHS_assign *lh, int nvars) {
     primaryexp(ls, &nv.v);
     if (nv.v.k != VINDEXED)
       check_conflict(ls, lh, &nv.v);
-    checklimit(ls->fs, nvars, LUAI_MAXCCALLS - G(ls->L)->nCcalls,
-                    "variable names");
+    checklimit(ls->fs, nvars + ls->L->nCcalls, LUAI_MAXCCALLS,
+                    "C levels");
     assignment(ls, &nv, nvars+1);
   }
-  else {  /* assignment -> `=' explist1 */
+  else {  /* assignment -> `=' explist */
     int nexps;
     checknext(ls, '=');
-    nexps = explist1(ls, &e);
+    nexps = explist(ls, &e);
     if (nexps != nvars) {
       adjust_assign(ls, nvars, nexps, &e);
       if (nexps > nvars)
@@ -1042,19 +1181,52 @@ static int cond (LexState *ls) {
 }
 
 
-static void breakstat (LexState *ls) {
-  FuncState *fs = ls->fs;
-  BlockCnt *bl = fs->bl;
-  int upval = 0;
-  while (bl && !bl->isbreakable) {
-    upval |= bl->upval;
-    bl = bl->previous;
+static void gotostat (LexState *ls, int pc) {
+  int line = ls->linenumber;
+  TString *label;
+  int g;
+  if (testnext(ls, TK_GOTO))
+    label = str_checkname(ls);
+  else {
+    luaX_next(ls);  /* skip break */
+    label = luaS_new(ls->L, "break");
   }
-  if (!bl)
-    luaX_syntaxerror(ls, "no loop to break");
-  if (upval)
-    luaK_codeABC(fs, OP_CLOSE, bl->nactvar, 0, 0);
-  luaK_concat(fs, &bl->breaklist, luaK_jump(fs));
+  g = newlabelentry(ls, &ls->dyd->gt, label, line, pc);
+  findlabel(ls, g);  /* close it if label already defined */
+}
+
+
+/* check for repeated labels on the same block */
+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)) {
+      const char *msg = luaO_pushfstring(fs->ls->L,
+                          "label " LUA_QS " already defined on line %d",
+                          getstr(label), ll->arr[i].line);
+      semerror(fs->ls, msg);
+    }
+  }
+}
+
+
+static void labelstat (LexState *ls, TString *label, int line) {
+  /* label -> '::' NAME '::' */
+  FuncState *fs = ls->fs;
+  Labellist *ll = &ls->dyd->label;
+  int l;  /* index of new label being created */
+  checkrepeated(fs, ll, label);  /* check for repeated labels */
+  checknext(ls, TK_DBCOLON);  /* skip double colon */
+  /* create new entry for this label */
+  l = newlabelentry(ls, ll, label, line, fs->pc);
+  /* skip other no-op statements */
+  while (ls->t.token == ';' || ls->t.token == TK_DBCOLON)
+    statement(ls);
+  if (block_follow(ls, 0)) {  /* label is last no-op statement in the block? */
+    /* assume that locals are already out of scope */
+    ll->arr[l].nactvar = fs->bl->nactvar;
+  }
+  findgotos(ls, &ll->arr[l]);
 }
 
 
@@ -1086,19 +1258,13 @@ static void repeatstat (LexState *ls, int line) {
   enterblock(fs, &bl1, 1);  /* loop block */
   enterblock(fs, &bl2, 0);  /* scope block */
   luaX_next(ls);  /* skip REPEAT */
-  chunk(ls);
+  statlist(ls);
   check_match(ls, TK_UNTIL, TK_REPEAT, line);
   condexit = cond(ls);  /* read condition (inside scope block) */
-  if (!bl2.upval) {  /* no upvalues? */
-    leaveblock(fs);  /* finish scope */
-    luaK_patchlist(fs, condexit, repeat_init);  /* close the loop */
-  }
-  else {  /* complete semantics when there are upvalues */
-    breakstat(ls);  /* if condition then break */
-    luaK_patchtohere(ls->fs, condexit);  /* else... */
-    leaveblock(fs);  /* finish scope... */
-    luaK_jumpto(fs, repeat_init);  /* and repeat */
-  }
+  if (bl2.upval)  /* upvalues? */
+    luaK_patchclose(fs, condexit, bl2.nactvar);
+  leaveblock(fs);  /* finish scope */
+  luaK_patchlist(fs, condexit, repeat_init);  /* close the loop */
   leaveblock(fs);  /* finish loop */
 }
 
@@ -1163,7 +1329,7 @@ static void fornum (LexState *ls, TString *varname, int line) {
 
 
 static void forlist (LexState *ls, TString *indexname) {
-  /* forlist -> NAME {,NAME} IN explist1 forbody */
+  /* forlist -> NAME {,NAME} IN explist forbody */
   FuncState *fs = ls->fs;
   expdesc e;
   int nvars = 4;  /* gen, state, control, plus at least one declared var */
@@ -1181,7 +1347,7 @@ static void forlist (LexState *ls, TString *indexname) {
   }
   checknext(ls, TK_IN);
   line = ls->linenumber;
-  adjust_assign(ls, 3, explist1(ls, &e), &e);
+  adjust_assign(ls, 3, explist(ls, &e), &e);
   luaK_checkstack(fs, 3);  /* extra space to call generator */
   forbody(ls, base, line, nvars - 3, 0);
 }
@@ -1205,55 +1371,67 @@ static void forstat (LexState *ls, int line) {
 }
 
 
-static int test_then_block (LexState *ls) {
+static void test_then_block (LexState *ls, int *escapelist) {
   /* test_then_block -> [IF | ELSEIF] cond THEN block */
-  int condexit;
+  BlockCnt bl;
+  FuncState *fs = ls->fs;
+  expdesc v;
+  int jf;  /* instruction to skip 'then' code (if condition is false) */
   luaX_next(ls);  /* skip IF or ELSEIF */
-  condexit = cond(ls);
+  expr(ls, &v);  /* read condition */
   checknext(ls, TK_THEN);
-  block(ls);  /* `then' part */
-  return condexit;
+  if (ls->t.token == TK_GOTO || ls->t.token == TK_BREAK) {
+    luaK_goiffalse(ls->fs, &v);  /* will jump to label if condition is true */
+    enterblock(fs, &bl, 0);  /* must enter block before 'goto' */
+    gotostat(ls, v.t);  /* handle goto/break */
+    if (block_follow(ls, 0)) {  /* 'goto' is the entire block? */
+      leaveblock(fs);
+      return;  /* and that is it */
+    }
+    else  /* must skip over 'then' part if condition is false */
+      jf = luaK_jump(fs);
+  }
+  else {  /* regular case (not goto/break) */
+    luaK_goiftrue(ls->fs, &v);  /* skip over block if condition is false */
+    enterblock(fs, &bl, 0);
+    jf = v.f;
+  }
+  statlist(ls);  /* `then' part */
+  leaveblock(fs);
+  if (ls->t.token == TK_ELSE ||
+      ls->t.token == TK_ELSEIF)  /* followed by 'else'/'elseif'? */
+    luaK_concat(fs, escapelist, luaK_jump(fs));  /* must jump over it */
+  luaK_patchtohere(fs, jf);
 }
 
 
 static void ifstat (LexState *ls, int line) {
   /* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */
   FuncState *fs = ls->fs;
-  int flist;
-  int escapelist = NO_JUMP;
-  flist = test_then_block(ls);  /* IF cond THEN block */
-  while (ls->t.token == TK_ELSEIF) {
-    luaK_concat(fs, &escapelist, luaK_jump(fs));
-    luaK_patchtohere(fs, flist);
-    flist = test_then_block(ls);  /* ELSEIF cond THEN block */
-  }
-  if (ls->t.token == TK_ELSE) {
-    luaK_concat(fs, &escapelist, luaK_jump(fs));
-    luaK_patchtohere(fs, flist);
-    luaX_next(ls);  /* skip ELSE (after patch, for correct line info) */
+  int escapelist = NO_JUMP;  /* exit list for finished parts */
+  test_then_block(ls, &escapelist);  /* IF cond THEN block */
+  while (ls->t.token == TK_ELSEIF)
+    test_then_block(ls, &escapelist);  /* ELSEIF cond THEN block */
+  if (testnext(ls, TK_ELSE))
     block(ls);  /* `else' part */
-  }
-  else
-    luaK_concat(fs, &escapelist, flist);
-  luaK_patchtohere(fs, escapelist);
   check_match(ls, TK_END, TK_IF, line);
+  luaK_patchtohere(fs, escapelist);  /* patch escape list to 'if' end */
 }
 
 
 static void localfunc (LexState *ls) {
-  expdesc v, b;
+  expdesc b;
   FuncState *fs = ls->fs;
-  new_localvar(ls, str_checkname(ls));
-  init_exp(&v, VLOCAL, fs->freereg);
-  luaK_reserveregs(fs, 1);
-  adjustlocalvars(ls, 1);
-  body(ls, &b, 0, ls->linenumber);
-  luaK_storevar(fs, &v, &b);
+  new_localvar(ls, str_checkname(ls));  /* new local variable */
+  adjustlocalvars(ls, 1);  /* enter its scope */
+  body(ls, &b, 0, ls->linenumber);  /* function created in next register */
+  /* debug information will only see the variable after this point! */
+  getlocvar(fs, b.u.info)->startpc = fs->pc;
 }
 
 
 static void localstat (LexState *ls) {
-  /* stat -> LOCAL NAME {`,' NAME} [`=' explist1] */
+  /* stat -> LOCAL NAME {`,' NAME} [`=' explist] */
   int nvars = 0;
   int nexps;
   expdesc e;
@@ -1262,7 +1440,7 @@ static void localstat (LexState *ls) {
     nvars++;
   } while (testnext(ls, ','));
   if (testnext(ls, '='))
-    nexps = explist1(ls, &e);
+    nexps = explist(ls, &e);
   else {
     e.k = VVOID;
     nexps = 0;
@@ -1274,25 +1452,25 @@ static void localstat (LexState *ls) {
 
 static int funcname (LexState *ls, expdesc *v) {
   /* funcname -> NAME {fieldsel} [`:' NAME] */
-  int needself = 0;
+  int ismethod = 0;
   singlevar(ls, v);
   while (ls->t.token == '.')
     fieldsel(ls, v);
   if (ls->t.token == ':') {
-    needself = 1;
+    ismethod = 1;
     fieldsel(ls, v);
   }
-  return needself;
+  return ismethod;
 }
 
 
 static void funcstat (LexState *ls, int line) {
   /* funcstat -> FUNCTION funcname body */
-  int needself;
+  int ismethod;
   expdesc v, b;
   luaX_next(ls);  /* skip FUNCTION */
-  needself = funcname(ls, &v);
-  body(ls, &b, needself, 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 */
 }
@@ -1313,14 +1491,14 @@ static void exprstat (LexState *ls) {
 
 
 static void retstat (LexState *ls) {
-  /* stat -> RETURN explist */
+  /* stat -> RETURN [explist] [';'] */
   FuncState *fs = ls->fs;
   expdesc e;
   int first, nret;  /* registers with returned values */
-  if (block_follow(ls->t.token) || ls->t.token == ';')
+  if (block_follow(ls, 1) || ls->t.token == ';')
     first = nret = 0;  /* return no values */
   else {
-    nret = explist1(ls, &e);  /* optional return values */
+    nret = explist(ls, &e);  /* optional return values */
     if (hasmultret(e.k)) {
       luaK_setmultret(fs, &e);
       if (e.k == VCALL && nret == 1) {  /* tail call? */
@@ -1341,41 +1519,43 @@ static void retstat (LexState *ls) {
     }
   }
   luaK_ret(fs, first, nret);
+  testnext(ls, ';');  /* skip optional semicolon */
 }
 
 
-static int statement (LexState *ls) {
+static void statement (LexState *ls) {
   int line = ls->linenumber;  /* may be needed for error messages */
+  enterlevel(ls);
   switch (ls->t.token) {
     case ';': {  /* stat -> ';' (empty statement) */
       luaX_next(ls);  /* skip ';' */
-      return 0;
+      break;
     }
     case TK_IF: {  /* stat -> ifstat */
       ifstat(ls, line);
-      return 0;
+      break;
     }
     case TK_WHILE: {  /* stat -> whilestat */
       whilestat(ls, line);
-      return 0;
+      break;
     }
     case TK_DO: {  /* stat -> DO block END */
       luaX_next(ls);  /* skip DO */
       block(ls);
       check_match(ls, TK_END, TK_DO, line);
-      return 0;
+      break;
     }
     case TK_FOR: {  /* stat -> forstat */
       forstat(ls, line);
-      return 0;
+      break;
     }
     case TK_REPEAT: {  /* stat -> repeatstat */
       repeatstat(ls, line);
-      return 0;
+      break;
     }
     case TK_FUNCTION: {  /* stat -> funcstat */
       funcstat(ls, line);
-      return 0;
+      break;
     }
     case TK_LOCAL: {  /* stat -> localstat */
       luaX_next(ls);  /* skip LOCAL */
@@ -1383,39 +1563,58 @@ static int statement (LexState *ls) {
         localfunc(ls);
       else
         localstat(ls);
-      return 0;
+      break;
+    }
+    case TK_DBCOLON: {  /* stat -> label */
+      luaX_next(ls);  /* skip double colon */
+      labelstat(ls, str_checkname(ls), line);
+      break;
     }
     case TK_RETURN: {  /* stat -> retstat */
       luaX_next(ls);  /* skip RETURN */
       retstat(ls);
-      return 1;  /* must be last statement */
+      break;
     }
-    case TK_BREAK: {  /* stat -> breakstat */
-      luaX_next(ls);  /* skip BREAK */
-      breakstat(ls);
-      return 1;  /* must be last statement */
+    case TK_BREAK:   /* stat -> breakstat */
+    case TK_GOTO: {  /* stat -> 'goto' NAME */
+      gotostat(ls, luaK_jump(ls->fs));
+      break;
     }
     default: {  /* stat -> func | assignment */
       exprstat(ls);
-      return 0;
+      break;
     }
   }
-}
-
-
-static void chunk (LexState *ls) {
-  /* chunk -> { stat [`;'] } */
-  int islast = 0;
-  enterlevel(ls);
-  while (!islast && !block_follow(ls->t.token)) {
-    islast = statement(ls);
-    if (islast)
-      testnext(ls, ';');
-    lua_assert(ls->fs->f->maxstacksize >= ls->fs->freereg &&
-               ls->fs->freereg >= ls->fs->nactvar);
-    ls->fs->freereg = ls->fs->nactvar;  /* free registers */
-  }
+  lua_assert(ls->fs->f->maxstacksize >= ls->fs->freereg &&
+             ls->fs->freereg >= ls->fs->nactvar);
+  ls->fs->freereg = ls->fs->nactvar;  /* free registers */
   leavelevel(ls);
 }
 
 /* }====================================================================== */
+
+
+Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                    Dyndata *dyd, const char *name, int firstchar) {
+  LexState lexstate;
+  FuncState funcstate;
+  BlockCnt bl;
+  TString *tname = luaS_new(L, name);
+  setsvalue2s(L, L->top, tname);  /* push name to protect it */
+  incr_top(L);
+  lexstate.buff = buff;
+  lexstate.dyd = dyd;
+  dyd->actvar.n = dyd->gt.n = dyd->label.n = 0;
+  luaX_setinput(L, &lexstate, z, tname, firstchar);
+  open_mainfunc(&lexstate, &funcstate, &bl);
+  luaX_next(&lexstate);  /* read first token */
+  statlist(&lexstate);  /* main body */
+  check(&lexstate, TK_EOS);
+  close_func(&lexstate);
+  L->top--;  /* pop name */
+  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);
+  return funcstate.f;
+}
+

lparser.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h,v 1.64 2010/07/02 20:42:40 roberto Exp roberto $
+** $Id: lparser.h,v 1.68 2011/02/23 13:13:10 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -53,19 +53,42 @@ typedef struct expdesc {
 } expdesc;
 
 
-typedef struct vardesc {
-  unsigned short idx;
-} vardesc;
+/* description of active local variable */
+typedef struct Vardesc {
+  short idx;  /* variable index in stack */
+} Vardesc;
 
 
-/* list of all active local variables */
-typedef struct Varlist {
-  vardesc *actvar;
-  int nactvar;
-  int actvarsize;
-} Varlist;
+/* description of pending goto statements and label statements */
+typedef struct Labeldesc {
+  TString *name;  /* label identifier */
+  int pc;  /* position in code */
+  int line;  /* line where it appeared */
+  lu_byte nactvar;  /* local level where it appears in current block */
+} Labeldesc;
 
 
+/* list of labels or gotos */
+typedef struct Labellist {
+  Labeldesc *arr;  /* array */
+  int n;  /* number of entries in use */
+  int size;  /* array size */
+} Labellist;
+
+
+/* dynamic structures used by the parser */
+typedef struct Dyndata {
+  struct {  /* list of active local variables */
+    Vardesc *arr;
+    int n;
+    int size;
+  } actvar;
+  Labellist gt;  /* list of pending gotos */
+  Labellist label;   /* list of active labels */
+} Dyndata;
+
+
+/* control of blocks */
 struct BlockCnt;  /* defined in lparser.c */
 
 
@@ -75,23 +98,22 @@ typedef struct FuncState {
   Table *h;  /* table to find (and reuse) elements in `k' */
   struct FuncState *prev;  /* enclosing function */
   struct LexState *ls;  /* lexical state */
-  struct lua_State *L;  /* copy of the Lua state */
   struct BlockCnt *bl;  /* chain of current blocks */
   int pc;  /* next position to code (equivalent to `ncode') */
-  int lasttarget;   /* `pc' of last `jump target' */
+  int lasttarget;   /* 'label' of last 'jump label' */
   int jpc;  /* list of pending jumps to `pc' */
-  int freereg;  /* first free register */
   int nk;  /* number of elements in `k' */
   int np;  /* number of elements in `p' */
-  int firstlocal;  /* index of first local var of this function */
-  short nlocvars;  /* number of elements in `locvars' */
+  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 */
   lu_byte nups;  /* number of upvalues */
+  lu_byte freereg;  /* first free register */
 } FuncState;
 
 
 LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
-                              Varlist *varl, const char *name);
+                              Dyndata *dyd, const char *name, int firstchar);
 
 
 #endif

lstate.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c,v 2.85 2010/04/30 18:36:22 roberto Exp roberto $
+** $Id: lstate.c,v 2.91 2011/08/23 17:24:34 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -65,11 +65,14 @@ typedef struct LG {
 #define fromstate(L)	(cast(LX *, cast(lu_byte *, (L)) - offsetof(LX, l)))
 
 
-
 /*
-** maximum number of nested calls made by error-handling function
+** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
+** invariant
 */
-#define LUAI_EXTRACALLS		10
+void luaE_setdebt (global_State *g, l_mem debt) {
+  g->totalbytes -= (debt - g->GCdebt);
+  g->GCdebt = debt;
+}
 
 
 CallInfo *luaE_extendCI (lua_State *L) {
@@ -133,10 +136,10 @@ static void init_registry (lua_State *L, global_State *g) {
   luaH_resize(L, registry, LUA_RIDX_LAST, 0);
   /* registry[LUA_RIDX_MAINTHREAD] = L */
   setthvalue(L, &mt, L);
-  setobj2t(L, luaH_setint(L, registry, LUA_RIDX_MAINTHREAD), &mt);
+  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &mt);
   /* registry[LUA_RIDX_GLOBALS] = table of globals */
   sethvalue(L, &mt, luaH_new(L));
-  setobj2t(L, luaH_setint(L, registry, LUA_RIDX_GLOBALS), &mt);
+  luaH_setint(L, registry, LUA_RIDX_GLOBALS, &mt);
 }
 
 
@@ -154,7 +157,7 @@ static void f_luaopen (lua_State *L, void *ud) {
   /* pre-create memory-error message */
   g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
   luaS_fix(g->memerrmsg);  /* it should never be collected */
-  g->GCdebt = 0;
+  g->gcrunning = 1;  /* allow gc */
 }
 
 
@@ -168,6 +171,7 @@ static void preinit_state (lua_State *L, global_State *g) {
   L->ci = NULL;
   L->stacksize = 0;
   L->errorJmp = NULL;
+  L->nCcalls = 0;
   L->hook = NULL;
   L->hookmask = 0;
   L->basehookcount = 0;
@@ -187,8 +191,8 @@ static void close_state (lua_State *L) {
   luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
   luaZ_freebuffer(L, &g->buff);
   freestack(L);
-  lua_assert(g->totalbytes == sizeof(LG));
-  (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0);
+  lua_assert(gettotalbytes(g) == sizeof(LG));
+  (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0);  /* free main block */
 }
 
 
@@ -234,14 +238,13 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
   L->marked = luaC_white(g);
   g->gckind = KGC_NORMAL;
-  g->nCcalls = 0;
   preinit_state(L, g);
   g->frealloc = f;
   g->ud = ud;
   g->mainthread = L;
   g->uvhead.u.l.prev = &g->uvhead;
   g->uvhead.u.l.next = &g->uvhead;
-  stopgc(g);  /* no GC while building state */
+  g->gcrunning = 0;  /* no GC while building state */
   g->lastmajormem = 0;
   g->strt.size = 0;
   g->strt.nuse = 0;
@@ -252,11 +255,12 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   g->version = lua_version(NULL);
   g->gcstate = GCSpause;
   g->allgc = NULL;
-  g->udgc = NULL;
+  g->finobj = NULL;
   g->tobefnz = NULL;
   g->gray = g->grayagain = NULL;
   g->weak = g->ephemeron = g->allweak = NULL;
   g->totalbytes = sizeof(LG);
+  g->GCdebt = 0;
   g->gcpause = LUAI_GCPAUSE;
   g->gcmajorinc = LUAI_GCMAJOR;
   g->gcstepmul = LUAI_GCMUL;
@@ -275,9 +279,6 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
 LUA_API void lua_close (lua_State *L) {
   L = G(L)->mainthread;  /* only the main thread can be closed */
   lua_lock(L);
-  luaF_close(L, L->stack);  /* close all upvalues for this thread */
-  luaC_separateudata(L, 1);  /* separate all udata with GC metamethods */
-  lua_assert(L->next == NULL);
   luai_userstateclose(L);
   close_state(L);
 }

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.67 2010/09/30 17:21:31 roberto Exp roberto $
+** $Id: lstate.h,v 2.73 2011/08/23 17:24:34 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -32,9 +32,9 @@
 ** when traversing the respective threads, but the thread may already be
 ** dead, while the upvalue is still accessible through closures.)
 **
-** Userdata with finalizers are kept in the list g->udgc.
+** Objects with finalizers are kept in the list g->finobj.
 **
-** The list g->tobefnz links all userdata being finalized.
+** The list g->tobefnz links all objects being finalized.
 
 */
 
@@ -47,8 +47,6 @@ struct lua_longjmp;  /* defined in ldo.c */
 #define EXTRA_STACK   5
 
 
-#define BASIC_CI_SIZE           8
-
 #define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
 
 
@@ -104,7 +102,6 @@ typedef struct CallInfo {
 #define CIST_TAIL	(1<<6)	/* call was tail called */
 
 
-#define ci_func(ci)	(clvalue((ci)->func))
 #define isLua(ci)	((ci)->callstatus & CIST_LUA)
 
 
@@ -114,18 +111,18 @@ typedef struct CallInfo {
 typedef struct global_State {
   lua_Alloc frealloc;  /* function to reallocate memory */
   void *ud;         /* auxiliary data to `frealloc' */
-  lu_mem totalbytes;  /* number of bytes currently allocated */
-  l_mem GCdebt;  /* when positive, run a GC step */
+  lu_mem totalbytes;  /* number of bytes currently allocated - GCdebt */
+  l_mem GCdebt;  /* bytes allocated not yet compensated by the collector */
   lu_mem lastmajormem;  /* memory in use after last major collection */
   stringtable strt;  /* hash table for strings */
   TValue l_registry;
-  unsigned short nCcalls;  /* number of nested C calls */
   lu_byte currentwhite;
   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 *udgc;  /* list of collectable userdata with finalizers */
+  GCObject *finobj;  /* list of collectable objects with finalizers */
   GCObject **sweepgc;  /* current position of sweep */
   GCObject *gray;  /* list of gray objects */
   GCObject *grayagain;  /* list of objects to be traversed atomically */
@@ -161,6 +158,7 @@ struct lua_State {
   StkId stack;  /* stack base */
   int stacksize;
   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;
@@ -209,6 +207,10 @@ union GCObject {
 #define obj2gco(v)	(cast(GCObject *, (v)))
 
 
+/* actual number of total bytes allocated */
+#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);

lstring.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.c,v 2.17 2010/04/03 20:24:18 roberto Exp roberto $
+** $Id: lstring.c,v 2.18 2010/05/10 18:23:45 roberto Exp roberto $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -84,8 +84,9 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
        o != NULL;
        o = gch(o)->next) {
     TString *ts = rawgco2ts(o);
-    if (h == ts->tsv.hash && ts->tsv.len == l &&
-                             (memcmp(str, getstr(ts), l) == 0)) {
+    if (h == ts->tsv.hash &&
+        ts->tsv.len == l &&
+        (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
       if (isdead(G(L), o))  /* string is dead (but was not collected yet)? */
         changewhite(o);  /* resurrect it */
       return ts;

lstrlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c,v 1.158 2010/11/16 20:39:41 roberto Exp roberto $
+** $Id: lstrlib.c,v 1.172 2011/10/25 12:01:20 roberto Exp roberto $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -45,7 +45,7 @@ static int str_len (lua_State *L) {
 /* translate a relative string position: negative means back from end */
 static size_t posrelat (ptrdiff_t pos, size_t len) {
   if (pos >= 0) return (size_t)pos;
-  else if (pos == -pos || (size_t)-pos > len) return 0;
+  else if (0u - (size_t)pos > len) return 0;
   else return len - ((size_t)-pos) + 1;
 }
 
@@ -101,15 +101,29 @@ static int str_upper (lua_State *L) {
   return 1;
 }
 
+
+/* reasonable limit to avoid arithmetic overflow */
+#define MAXSIZE		((~(size_t)0) >> 1)
+
 static int str_rep (lua_State *L) {
-  size_t l;
-  luaL_Buffer b;
+  size_t l, lsep;
   const char *s = luaL_checklstring(L, 1, &l);
   int n = luaL_checkint(L, 2);
-  luaL_buffinit(L, &b);
-  while (n-- > 0)
-    luaL_addlstring(&b, s, l);
-  luaL_pushresult(&b);
+  const char *sep = luaL_optlstring(L, 3, "", &lsep);
+  if (n <= 0) lua_pushliteral(L, "");
+  else if (l + lsep < l || l + lsep >= MAXSIZE / n)  /* may overflow? */
+    return luaL_error(L, "resulting string too large");
+  else {
+    size_t totallen = n * l + (n - 1) * lsep;
+    luaL_Buffer b;
+    char *p = luaL_buffinitsize(L, &b, totallen);
+    while (n-- > 1) {  /* first n-1 copies (followed by separator) */
+      memcpy(p, s, l * sizeof(char)); p += l;
+      memcpy(p, sep, lsep * sizeof(char)); p += lsep;
+    }
+    memcpy(p, s, l * sizeof(char));  /* last copy (not followed by separator) */
+    luaL_pushresultsize(&b, totallen);
+  }
   return 1;
 }
 
@@ -124,8 +138,8 @@ static int str_byte (lua_State *L) {
   if (pose > l) pose = l;
   if (posi > pose) return 0;  /* empty interval; return no values */
   n = (int)(pose -  posi + 1);
-  if (posi + n <= pose)  /* overflow? */
-    luaL_error(L, "string slice too long");
+  if (posi + n <= pose)  /* (size_t -> int) overflow? */
+    return luaL_error(L, "string slice too long");
   luaL_checkstack(L, n, "string slice too long");
   for (i=0; i<n; i++)
     lua_pushinteger(L, uchar(s[posi+i-1]));
@@ -140,7 +154,7 @@ static int str_char (lua_State *L) {
   char *p = luaL_buffinitsize(L, &b, n);
   for (i=1; i<=n; i++) {
     int c = luaL_checkint(L, i);
-    luaL_argcheck(L, uchar(c) == c, i, "invalid value");
+    luaL_argcheck(L, uchar(c) == c, i, "value out of range");
     p[i - 1] = uchar(c);
   }
   luaL_pushresultsize(&b, n);
@@ -161,7 +175,7 @@ static int str_dump (lua_State *L) {
   lua_settop(L, 1);
   luaL_buffinit(L,&b);
   if (lua_dump(L, writer, &b) != 0)
-    luaL_error(L, "unable to dump given function");
+    return luaL_error(L, "unable to dump given function");
   luaL_pushresult(&b);
   return 1;
 }
@@ -510,7 +524,7 @@ static int nospecials (const char *p, size_t l) {
   size_t upto = 0;
   do {
     if (strpbrk(p + upto, SPECIALS))
-      return 0;  /* pattern has a special character */ 
+      return 0;  /* pattern has a special character */
     upto += strlen(p + upto) + 1;  /* may have more after \0 */
   } while (upto <= l);
   return 1;  /* no special chars found */
@@ -729,7 +743,7 @@ static int str_gsub (lua_State *L) {
 ** the previous length
 */
 #if !defined(LUA_INTFRMLEN)	/* { */
-#if defined(LUA_USELONGLONG)
+#if defined(LUA_USE_LONGLONG)
 
 #define LUA_INTFRMLEN           "ll"
 #define LUA_INTFRM_T            long long
@@ -742,6 +756,9 @@ static int str_gsub (lua_State *L) {
 #endif
 #endif				/* } */
 
+#define MAX_UINTFRM	((lua_Number)(~(unsigned LUA_INTFRM_T)0))
+#define MAX_INTFRM	((lua_Number)((~(unsigned LUA_INTFRM_T)0)/2))
+#define MIN_INTFRM	(-(lua_Number)((~(unsigned LUA_INTFRM_T)0)/2) - 1)
 
 /*
 ** LUA_FLTFRMLEN is the length modifier for float conversions in
@@ -794,7 +811,7 @@ static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
 static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
   const char *p = strfrmt;
   while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++;  /* skip flags */
-  if ((size_t)(p - strfrmt) >= sizeof(FLAGS))
+  if ((size_t)(p - strfrmt) >= sizeof(FLAGS)/sizeof(char))
     luaL_error(L, "invalid format (repeated flags)");
   if (isdigit(uchar(*p))) p++;  /* skip width */
   if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
@@ -806,7 +823,7 @@ static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
   if (isdigit(uchar(*p)))
     luaL_error(L, "invalid format (width or precision too long)");
   *(form++) = '%';
-  memcpy(form, strfrmt, p - strfrmt + 1);
+  memcpy(form, strfrmt, (p - strfrmt + 1) * sizeof(char));
   form += p - strfrmt + 1;
   *form = '\0';
   return p;
@@ -851,16 +868,26 @@ static int str_format (lua_State *L) {
           nb = sprintf(buff, form, luaL_checkint(L, arg));
           break;
         }
-        case 'd':  case 'i':
+        case 'd':  case 'i': {
+          lua_Number n = luaL_checknumber(L, arg);
+          luaL_argcheck(L, (MIN_INTFRM - 1) < n && n < (MAX_INTFRM + 1), arg,
+                        "not a number in proper range");
+          addlenmod(form, LUA_INTFRMLEN);
+          nb = sprintf(buff, form, (LUA_INTFRM_T)n);
+          break;
+        }
         case 'o':  case 'u':  case 'x':  case 'X': {
           lua_Number n = luaL_checknumber(L, arg);
-          LUA_INTFRM_T r = (n < 0) ? (LUA_INTFRM_T)n :
-                                     (LUA_INTFRM_T)(unsigned LUA_INTFRM_T)n;
+          luaL_argcheck(L, 0 <= n && n < (MAX_UINTFRM + 1), arg,
+                        "not a non-negative number in proper range");
           addlenmod(form, LUA_INTFRMLEN);
-          nb = sprintf(buff, form, r);
+          nb = sprintf(buff, form, (unsigned LUA_INTFRM_T)n);
           break;
         }
         case 'e':  case 'E': case 'f':
+#if defined(LUA_USE_AFORMAT)
+        case 'a': case 'A':
+#endif
         case 'g': case 'G': {
           addlenmod(form, LUA_FLTFRMLEN);
           nb = sprintf(buff, form, (LUA_FLTFRM_T)luaL_checknumber(L, arg));
@@ -872,16 +899,16 @@ static int str_format (lua_State *L) {
         }
         case 's': {
           size_t l;
-          const char *s = luaL_checklstring(L, arg, &l);
+          const char *s = luaL_tolstring(L, arg, &l);
           if (!strchr(form, '.') && l >= 100) {
             /* no precision and string is too long to be formatted;
                keep original string */
-            lua_pushvalue(L, arg);
             luaL_addvalue(&b);
             break;
           }
           else {
             nb = sprintf(buff, form, s);
+            lua_pop(L, 1);  /* remove result from 'luaL_tolstring' */
             break;
           }
         }
@@ -920,13 +947,13 @@ static const luaL_Reg strlib[] = {
 
 
 static void createmetatable (lua_State *L) {
-  lua_createtable(L, 0, 1);  /* create metatable for strings */
+  lua_createtable(L, 0, 1);  /* table to be metatable for strings */
   lua_pushliteral(L, "");  /* dummy string */
-  lua_pushvalue(L, -2);
-  lua_setmetatable(L, -2);  /* set string metatable */
+  lua_pushvalue(L, -2);  /* copy table */
+  lua_setmetatable(L, -2);  /* set table as metatable for strings */
   lua_pop(L, 1);  /* pop dummy string */
-  lua_pushvalue(L, -2);  /* string library... */
-  lua_setfield(L, -2, "__index");  /* ...is the __index metamethod */
+  lua_pushvalue(L, -2);  /* get string library */
+  lua_setfield(L, -2, "__index");  /* metatable.__index = string */
   lua_pop(L, 1);  /* pop metatable */
 }
 

ltable.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 2.52 2010/06/25 12:18:10 roberto Exp roberto $
+** $Id: ltable.c,v 2.66 2011/11/28 17:25:48 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -33,6 +33,7 @@
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
+#include "lvm.h"
 
 
 /*
@@ -63,13 +64,6 @@
 #define hashpointer(t,p)	hashmod(t, IntPoint(p))
 
 
-/*
-** number of ints inside a lua_Number
-*/
-#define numints		cast_int(sizeof(lua_Number)/sizeof(int))
-
-
-
 #define dummynode		(&dummynode_)
 
 #define isdummy(n)		((n) == dummynode)
@@ -87,8 +81,9 @@ static Node *hashnum (const Table *t, lua_Number n) {
   int i;
   luai_hashnum(i, n);
   if (i < 0) {
-     i = -i;  /* must be a positive value */
-     if (i < 0) i = 0;  /* handle INT_MIN */
+    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);
 }
@@ -146,19 +141,19 @@ static int findindex (lua_State *L, Table *t, StkId key) {
     return i-1;  /* yes; that's the index (corrected to C) */
   else {
     Node *n = mainposition(t, key);
-    do {  /* check whether `key' is somewhere in the chain */
+    for (;;) {  /* check whether `key' is somewhere in the chain */
       /* key may be dead already, but it is ok to use it in `next' */
-      if (luaO_rawequalObj(gkey(n), key) ||
-            (ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) &&
-             gcvalue(gkey(n)) == gcvalue(key))) {
+      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 + t->sizearray;
       }
       else n = gnext(n);
-    } while (n);
-    luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
-    return 0;  /* to avoid warnings */
+      if (n == NULL)
+        luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
+    }
   }
 }
 
@@ -312,7 +307,7 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
     /* re-insert elements from vanishing slice */
     for (i=nasize; i<oldasize; i++) {
       if (!ttisnil(&t->array[i]))
-        setobjt2t(L, luaH_setint(L, t, i+1), &t->array[i]);
+        luaH_setint(L, t, i + 1, &t->array[i]);
     }
     /* shrink array */
     luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
@@ -320,11 +315,14 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
   /* re-insert elements from hash part */
   for (i = twoto(oldhsize) - 1; i >= 0; i--) {
     Node *old = nold+i;
-    if (!ttisnil(gval(old)))
+    if (!ttisnil(gval(old))) {
+      /* doesn't need barrier/invalidate cache, as entry was
+         already present in the table */
       setobjt2t(L, luaH_set(L, t, gkey(old)), gval(old));
+    }
   }
   if (!isdummy(nold))
-    luaM_freearray(L, nold, twoto(oldhsize));  /* free old array */
+    luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */
 }
 
 
@@ -336,7 +334,7 @@ void luaH_resizearray (lua_State *L, Table *t, int nasize) {
 
 static void rehash (lua_State *L, Table *t, const TValue *ek) {
   int nasize, na;
-  int nums[MAXBITS+1];  /* nums[i] = number of keys between 2^(i-1) and 2^i */
+  int nums[MAXBITS+1];  /* nums[i] = number of keys with 2^(i-1) < k <= 2^i */
   int i;
   int totaluse;
   for (i=0; i<=MAXBITS; i++) nums[i] = 0;  /* reset counts */
@@ -372,7 +370,7 @@ Table *luaH_new (lua_State *L) {
 
 void luaH_free (lua_State *L, Table *t) {
   if (!isdummy(t->node))
-    luaM_freearray(L, t->node, sizenode(t));
+    luaM_freearray(L, t->node, cast(size_t, sizenode(t)));
   luaM_freearray(L, t->array, t->sizearray);
   luaM_free(L, t);
 }
@@ -396,14 +394,19 @@ static Node *getfreepos (Table *t) {
 ** put new key in its main position; otherwise (colliding node is in its main
 ** position), new key goes to an empty position.
 */
-static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
-  Node *mp = mainposition(t, key);
+TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
+  Node *mp;
+  if (ttisnil(key)) luaG_runerror(L, "table index is nil");
+  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 *n = getfreepos(t);  /* get a free place */
     if (n == NULL) {  /* cannot find a free place? */
       rehash(L, t, key);  /* grow table */
-      return luaH_set(L, t, key);  /* re-insert key into grown table */
+      /* 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(n));
     othern = mainposition(t, gkey(mp));
@@ -467,7 +470,7 @@ const TValue *luaH_getstr (Table *t, TString *key) {
 ** main search function
 */
 const TValue *luaH_get (Table *t, const TValue *key) {
-  switch (ttype(key)) {
+  switch (ttypenv(key)) {
     case LUA_TNIL: return luaO_nilobject;
     case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
     case LUA_TNUMBER: {
@@ -481,7 +484,7 @@ const TValue *luaH_get (Table *t, const TValue *key) {
     default: {
       Node *n = mainposition(t, key);
       do {  /* check whether `key' is somewhere in the chain */
-        if (luaO_rawequalObj(gkey(n), key))
+        if (luaV_rawequalobj(gkey(n), key))
           return gval(n);  /* that's it */
         else n = gnext(n);
       } while (n);
@@ -491,41 +494,29 @@ const TValue *luaH_get (Table *t, const TValue *key) {
 }
 
 
+/*
+** beware: when using this function you probably need to check a GC
+** barrier and invalidate the TM cache.
+*/
 TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
   const TValue *p = luaH_get(t, key);
-  t->flags = 0;
   if (p != luaO_nilobject)
     return cast(TValue *, p);
-  else {
-    if (ttisnil(key)) luaG_runerror(L, "table index is nil");
-    else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
-      luaG_runerror(L, "table index is NaN");
-    return newkey(L, t, key);
-  }
+  else return luaH_newkey(L, t, key);
 }
 
 
-TValue *luaH_setint (lua_State *L, Table *t, int key) {
+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)
-    return cast(TValue *, p);
+    cell = cast(TValue *, p);
   else {
     TValue k;
     setnvalue(&k, cast_num(key));
-    return newkey(L, t, &k);
-  }
-}
-
-
-TValue *luaH_setstr (lua_State *L, Table *t, TString *key) {
-  const TValue *p = luaH_getstr(t, key);
-  if (p != luaO_nilobject)
-    return cast(TValue *, p);
-  else {
-    TValue k;
-    setsvalue(L, &k, key);
-    return newkey(L, t, &k);
+    cell = luaH_newkey(L, t, &k);
   }
+  setobj2t(L, cell, value);
 }
 
 

ltable.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h,v 2.13 2009/11/06 17:07:48 roberto Exp roberto $
+** $Id: ltable.h,v 2.15 2011/08/09 20:58:29 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -15,12 +15,14 @@
 #define gval(n)		(&(n)->i_val)
 #define gnext(n)	((n)->i_key.nk.next)
 
+#define invalidateTMcache(t)	((t)->flags = 0)
+
 
 LUAI_FUNC const TValue *luaH_getint (Table *t, int key);
-LUAI_FUNC TValue *luaH_setint (lua_State *L, 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 TValue *luaH_setstr (lua_State *L, 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, int nasize, int nhsize);

ltablib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltablib.c,v 1.57 2010/10/25 19:01:37 roberto Exp roberto $
+** $Id: ltablib.c,v 1.62 2011/09/30 12:45:45 roberto Exp roberto $
 ** Library for Table Manipulation
 ** See Copyright Notice in lua.h
 */
@@ -17,12 +17,7 @@
 
 
 #define aux_getn(L,n)  \
-	(luaL_checktype(L, n, LUA_TTABLE), (int)lua_rawlen(L, n))
-
-
-static int deprecatedfunc (lua_State *L) {
-  return luaL_error(L, "deprecated function");
-}
+	(luaL_checktype(L, n, LUA_TTABLE), luaL_len(L, n))
 
 
 #if defined(LUA_COMPAT_MAXN)
@@ -40,8 +35,6 @@ static int maxn (lua_State *L) {
   lua_pushnumber(L, max);
   return 1;
 }
-#else
-#define maxn	deprecatedfunc
 #endif
 
 
@@ -93,7 +86,7 @@ static void addfield (lua_State *L, luaL_Buffer *b, int i) {
   if (!lua_isstring(L, -1))
     luaL_error(L, "invalid value (%s) at index %d in table for "
                   LUA_QL("concat"), luaL_typename(L, -1), i);
-    luaL_addvalue(b);
+  luaL_addvalue(b);
 }
 
 
@@ -104,7 +97,7 @@ static int tconcat (lua_State *L) {
   const char *sep = luaL_optlstring(L, 2, "", &lsep);
   luaL_checktype(L, 1, LUA_TTABLE);
   i = luaL_optint(L, 3, 1);
-  last = luaL_opt(L, luaL_checkint, 4, (int)lua_rawlen(L, 1));
+  last = luaL_opt(L, luaL_checkint, 4, luaL_len(L, 1));
   luaL_buffinit(L, &b);
   for (; i < last; i++) {
     addfield(L, &b, i);
@@ -124,18 +117,19 @@ static int tconcat (lua_State *L) {
 */
 
 static int pack (lua_State *L) {
-  int top = lua_gettop(L);
-  lua_createtable(L, top, 1);  /* create result table */
-  lua_pushinteger(L, top);  /* number of elements */
+  int n = lua_gettop(L);  /* number of elements to pack */
+  lua_createtable(L, n, 1);  /* create result table */
+  lua_pushinteger(L, n);
   lua_setfield(L, -2, "n");  /* t.n = number of elements */
-  if (top > 0) {  /* at least one element? */
+  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 its position (index 1) */
-    for (; top >= 2; top--)  /* assign other elements */
-      lua_rawseti(L, 1, top);
+    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 1;  /* return table */
 }
 
 
@@ -143,7 +137,7 @@ static int unpack (lua_State *L) {
   int i, e, n;
   luaL_checktype(L, 1, LUA_TTABLE);
   i = luaL_optint(L, 2, 1);
-  e = luaL_opt(L, luaL_checkint, 3, (int)lua_rawlen(L, 1));
+  e = luaL_opt(L, luaL_checkint, 3, luaL_len(L, 1));
   if (i > e) return 0;  /* empty range */
   n = e - i + 1;  /* number of elements */
   if (n <= 0 || !lua_checkstack(L, n))  /* n <= 0 means arith. overflow */
@@ -265,10 +259,9 @@ static int sort (lua_State *L) {
 
 static const luaL_Reg tab_funcs[] = {
   {"concat", tconcat},
-  {"foreach", deprecatedfunc},
-  {"foreachi", deprecatedfunc},
-  {"getn", deprecatedfunc},
+#if defined(LUA_COMPAT_MAXN)
   {"maxn", maxn},
+#endif
   {"insert", tinsert},
   {"pack", pack},
   {"unpack", unpack},

ltests.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 2.112 2010/07/28 15:51:59 roberto Exp roberto $
+** $Id: ltests.c,v 2.123 2011/09/24 21:11:29 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -83,7 +83,7 @@ typedef union Header {
 } Header;
 
 
-#ifndef EXTERNMEMCHECK
+#if !defined(EXTERNMEMCHECK)
 
 /* full memory check */
 #define MARKSIZE	16  /* size of marks after each block */
@@ -215,7 +215,8 @@ static int testobjref (global_State *g, GCObject *f, GCObject *t) {
 
 static void checkvalref (global_State *g, GCObject *f, const TValue *t) {
   if (iscollectable(t)) {
-    lua_assert(righttt(t) && testobjref(g, f, gcvalue(t)));
+    lua_assert(righttt(t));
+    lua_assert(testobjref(g, f, gcvalue(t)));
   }
 }
 
@@ -290,7 +291,7 @@ static void checkclosure (global_State *g, Closure *cl) {
 static int lua_checkpc (pCallInfo ci) {
   if (!isLua(ci)) return 1;
   else {
-    Proto *p = ci_func(ci)->l.p;
+    Proto *p = ci_func(ci)->p;
     return p->code <= ci->u.l.savedpc &&
            ci->u.l.savedpc <= p->code + p->sizecode;
   }
@@ -367,7 +368,7 @@ static void checkgraylist (GCObject *l) {
   while (l) {
     lua_assert(isgray(l));
     lua_assert(!testbit(l->gch.marked, TESTGRAYBIT));
-    l->gch.marked = l_setbit(l->gch.marked, TESTGRAYBIT);
+    l_setbit(l->gch.marked, TESTGRAYBIT);
     switch (gch(l)->tt) {
       case LUA_TTABLE: l = gco2t(l)->gclist; break;
       case LUA_TFUNCTION: l = gco2cl(l)->c.gclist; break;
@@ -404,7 +405,7 @@ static void checkold (global_State *g, GCObject *o) {
     else lua_assert(!isold);  /* non-old object cannot be after an old one */
     if (isgray(o)) {
       lua_assert(!keepinvariant(g) || testbit(o->gch.marked, TESTGRAYBIT));
-      o->gch.marked = resetbit(o->gch.marked, TESTGRAYBIT);
+      resetbit(o->gch.marked, TESTGRAYBIT);
     }
     lua_assert(!testbit(o->gch.marked, TESTGRAYBIT));
   }
@@ -421,7 +422,7 @@ int lua_checkmemory (lua_State *L) {
   }
   lua_assert(!isdead(g, gcvalue(&g->l_registry)));
   checkstack(g, g->mainthread);
-  g->mainthread->marked = resetbit(g->mainthread->marked, TESTGRAYBIT);
+  resetbit(g->mainthread->marked, TESTGRAYBIT);
   /* check 'allgc' list */
   markgrays(g);
   checkold(g, g->allgc);
@@ -429,20 +430,21 @@ int lua_checkmemory (lua_State *L) {
     checkobject(g, o);
     lua_assert(!testbit(o->gch.marked, SEPARATED));
   }
-  /* check 'udgc' list */
-  checkold(g, g->udgc);
-  for (o = g->udgc; o != NULL; o = gch(o)->next) {
-    lua_assert(gch(o)->tt == LUA_TUSERDATA &&
-               !isdead(g, o) &&
-               testbit(o->gch.marked, SEPARATED));
+  /* check 'finobj' list */
+  checkold(g, g->finobj);
+  for (o = g->finobj; o != NULL; o = gch(o)->next) {
+    lua_assert(!isdead(g, o) && testbit(o->gch.marked, SEPARATED));
+    lua_assert(gch(o)->tt == LUA_TUSERDATA ||
+               gch(o)->tt == LUA_TTABLE);
     checkobject(g, o);
   }
   /* check 'tobefnz' list */
   checkold(g, g->tobefnz);
   for (o = g->tobefnz; o != NULL; o = gch(o)->next) {
-    lua_assert(gch(o)->tt == LUA_TUSERDATA);
-    lua_assert(isblack(o));
-    lua_assert(testbit(o->gch.marked, SEPARATED));
+    lua_assert(!iswhite(o));
+    lua_assert(!isdead(g, o) && testbit(o->gch.marked, SEPARATED));
+    lua_assert(gch(o)->tt == LUA_TUSERDATA ||
+               gch(o)->tt == LUA_TTABLE);
   }
   /* check 'uvhead' list */
   for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) {
@@ -593,7 +595,10 @@ static int mem_query (lua_State *L) {
 
 
 static int settrick (lua_State *L) {
-  l_Trick = gcvalue(obj_at(L, 1));
+  if (ttisnil(obj_at(L, 1)))
+    l_Trick = NULL;
+  else
+    l_Trick = gcvalue(obj_at(L, 1));
   return 0;
 }
 
@@ -775,7 +780,7 @@ static int newuserdata (lua_State *L) {
 
 
 static int pushuserdata (lua_State *L) {
-  lua_pushlightuserdata(L, cast(void *, luaL_checkint(L, 1)));
+  lua_pushlightuserdata(L, cast(void *, luaL_checkinteger(L, 1)));
   return 1;
 }
 
@@ -852,7 +857,7 @@ static int loadlib (lua_State *L) {
   lua_State *L1 = getstate(L);
   int i;
   luaL_requiref(L1, "package", luaopen_package, 1);
-  luaL_findtable(L1, LUA_REGISTRYINDEX, "_PRELOAD");
+  luaL_getsubtable(L1, LUA_REGISTRYINDEX, "_PRELOAD");
   for (i = 0; libs[i].name; i++) {
     lua_pushcfunction(L1, libs[i].func);
     lua_setfield(L1, -2, libs[i].name);
@@ -936,9 +941,9 @@ static int getnum_aux (lua_State *L, lua_State *L1, const char **pc) {
     sig = -1;
     (*pc)++;
   }
-  if (!lisdigit(cast(unsigned char, **pc)))
+  if (!lisdigit(cast_uchar(**pc)))
     luaL_error(L, "number expected (%s)", *pc);
-  while (lisdigit(cast(unsigned char, **pc))) res = res*10 + (*(*pc)++) - '0';
+  while (lisdigit(cast_uchar(**pc))) res = res*10 + (*(*pc)++) - '0';
   return sig*res;
 }
 
@@ -1208,7 +1213,7 @@ static int runC (lua_State *L, lua_State *L1, const char *pc) {
     }
     else if EQ("resume") {
       int i = getindex;
-      status = lua_resume(lua_tothread(L1, i), getnum);
+      status = lua_resume(lua_tothread(L1, i), L, getnum);
     }
     else if EQ("pushstatus") {
       pushcode(L1, status);
@@ -1252,7 +1257,8 @@ static int runC (lua_State *L, lua_State *L1, const char *pc) {
       lua_pushinteger(L1, i);
     }
     else if EQ("checkstack") {
-      luaL_checkstack(L1, getnum, NULL);
+      int sz = getnum;
+      luaL_checkstack(L1, sz, getstring);
     }
     else if EQ("newmetatable") {
       lua_pushboolean(L1, luaL_newmetatable(L1, getstring));
@@ -1395,7 +1401,7 @@ static int coresume (lua_State *L) {
   int status;
   lua_State *co = lua_tothread(L, 1);
   luaL_argcheck(L, co, 1, "coroutine expected");
-  status = lua_resume(co, 0);
+  status = lua_resume(co, L, 0);
   if (status != LUA_OK && status != LUA_YIELD) {
     lua_pushboolean(L, 0);
     lua_insert(L, -2);

ltm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 2.11 2010/01/13 16:18:25 roberto Exp roberto $
+** $Id: ltm.c,v 2.13 2011/02/28 17:32:10 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -21,11 +21,11 @@
 
 static const char udatatypename[] = "userdata";
 
-LUAI_DDEF const char *const luaT_typenames_[] = {
+LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
   "no value",
   "nil", "boolean", udatatypename, "number",
   "string", "table", "function", udatatypename, "thread",
-  "proto", "upval"
+  "proto", "upval"  /* these last two cases are used for tests only */
 };
 
 
@@ -62,7 +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 (ttype(o)) {
+  switch (ttypenv(o)) {
     case LUA_TTABLE:
       mt = hvalue(o)->metatable;
       break;

ltm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 2.9 2010/01/13 16:18:25 roberto Exp roberto $
+** $Id: ltm.h,v 2.10 2010/04/13 20:48:12 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -46,7 +46,7 @@ typedef enum {
 #define ttypename(x)	luaT_typenames_[(x) + 1]
 #define objtypename(x)	ttypename(ttypenv(x))
 
-LUAI_DDEC const char *const luaT_typenames_[];
+LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
 
 
 LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);

lua.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.193 2010/10/18 16:06:33 roberto Exp roberto $
+** $Id: lua.c,v 1.202 2011/08/17 20:19:52 roberto Exp roberto $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -106,13 +106,11 @@ static void laction (int i) {
 
 
 static void print_usage (const char *badoption) {
-  if (badoption[1] == 'e' || badoption[1] == 'l') {
-    luai_writestringerror("%s: ", progname);
+  luai_writestringerror("%s: ", progname);
+  if (badoption[1] == 'e' || badoption[1] == 'l')
     luai_writestringerror("'%s' needs argument\n", badoption);
-  } else {
-    luai_writestringerror("%s: ", progname);
+  else
     luai_writestringerror("unrecognized option '%s'\n", badoption);
-  }
   luai_writestringerror(
   "usage: %s [options] [script [args]]\n"
   "Available options are:\n"
@@ -120,6 +118,7 @@ static void print_usage (const char *badoption) {
   "  -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"
   "  -        stop handling options and execute stdin\n"
   ,
@@ -185,7 +184,8 @@ static int docall (lua_State *L, int narg, int nres) {
 
 
 static void print_version (void) {
-  printf("%s\n", LUA_COPYRIGHT);
+  luai_writestring(LUA_COPYRIGHT, strlen(LUA_COPYRIGHT));
+  luai_writeline();
 }
 
 
@@ -247,14 +247,14 @@ static const char *get_prompt (lua_State *L, int firstline) {
 }
 
 /* mark in error messages for incomplete statements */
-#define mark	"<eof>"
-#define marklen	(sizeof(mark) - 1)
+#define EOFMARK		"<eof>"
+#define marklen		(sizeof(EOFMARK)/sizeof(char) - 1)
 
 static int incomplete (lua_State *L, int status) {
   if (status == LUA_ERRSYNTAX) {
     size_t lmsg;
     const char *msg = lua_tolstring(L, -1, &lmsg);
-    if (lmsg >= marklen && strcmp(msg + lmsg - marklen, mark) == 0) {
+    if (lmsg >= marklen && strcmp(msg + lmsg - marklen, EOFMARK) == 0) {
       lua_pop(L, 1);
       return 1;
     }
@@ -322,7 +322,7 @@ static void dotty (lua_State *L) {
     }
   }
   lua_settop(L, 0);  /* clear stack */
-  luai_writestring("\n", 1);
+  luai_writeline();
   progname = oldprogname;
 }
 
@@ -349,7 +349,16 @@ static int handle_script (lua_State *L, char **argv, int n) {
 #define noextrachars(x)		{if ((x)[2] != '\0') return -1;}
 
 
-static int collectargs (char **argv, int *pi, int *pv, int *pe) {
+/* 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++) {
     if (argv[i][0] != '-')  /* not an option? */
@@ -360,15 +369,18 @@ static int collectargs (char **argv, int *pi, int *pv, int *pe) {
         return (argv[i+1] != NULL ? i+1 : 0);
       case '\0':
         return i;
+      case 'E':
+        args[has_E] = 1;
+        break;
       case 'i':
         noextrachars(argv[i]);
-        *pi = 1;  /* go through */
+        args[has_i] = 1;  /* go through */
       case 'v':
         noextrachars(argv[i]);
-        *pv = 1;
+        args[has_v] = 1;
         break;
       case 'e':
-        *pe = 1;  /* go through */
+        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' */
@@ -431,28 +443,33 @@ static int pmain (lua_State *L) {
   int argc = (int)lua_tointeger(L, 1);
   char **argv = (char **)lua_touserdata(L, 2);
   int script;
-  int has_i = 0, has_v = 0, has_e = 0;
+  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];
-  script = collectargs(argv, &has_i, &has_v, &has_e);
+  script = collectargs(argv, args);
   if (script < 0) {  /* invalid arg? */
     print_usage(argv[-script]);
     return 0;
   }
-  if (has_v) print_version();
+  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");
+  }
   /* 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);
-  /* run LUA_INIT */
-  if (handle_luainit(L) != LUA_OK) return 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 (has_i)  /* -i option? */
+  if (args[has_i])  /* -i option? */
     dotty(L);
-  else if (script == 0 && !has_e && !has_v) {  /* no arguments? */
+  else if (script == 0 && !args[has_e] && !args[has_v]) {  /* no arguments? */
     if (lua_stdin_is_tty()) {
       print_version();
       dotty(L);

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.275 2010/10/25 20:31:11 roberto Exp roberto $
+** $Id: lua.h,v 1.281 2011/10/24 16:53:05 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
@@ -18,12 +18,12 @@
 
 #define LUA_VERSION_MAJOR	"5"
 #define LUA_VERSION_MINOR	"2"
+#define LUA_VERSION_NUM		502
 #define LUA_VERSION_RELEASE	"0"
 
 #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
-#define LUA_VERSION_NUM	502
-#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2010 Lua.org, PUC-Rio"
+#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2011 Lua.org, PUC-Rio"
 #define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
 
 
@@ -215,10 +215,12 @@ LUA_API int   (lua_pushthread) (lua_State *L);
 /*
 ** get functions (Lua -> stack)
 */
+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);
@@ -228,10 +230,12 @@ LUA_API void  (lua_getuservalue) (lua_State *L, int idx);
 /*
 ** set functions (stack -> Lua)
 */
+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_rawset) (lua_State *L, int idx);
 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);
 
@@ -250,7 +254,8 @@ LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
 #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 *chunkname,
+                                        const char *mode);
 
 LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
 
@@ -261,7 +266,7 @@ LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
 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, int narg);
+LUA_API int  (lua_resume) (lua_State *L, lua_State *from, int narg);
 LUA_API int  (lua_status) (lua_State *L);
 
 /*
@@ -314,13 +319,6 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
 #define lua_newtable(L)		lua_createtable(L, 0, 0)
 
-#define lua_setglobal(L,s)  \
-	(lua_pushglobaltable(L), lua_pushvalue(L, -2), \
-	 lua_setfield(L, -2, (s)), lua_pop(L, 2))
-
-#define lua_getglobal(L,s) \
-	(lua_pushglobaltable(L), lua_getfield(L, -1, (s)), lua_remove(L, -2))
-
 #define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
 
 #define lua_pushcfunction(L,f)	lua_pushcclosure(L, (f), 0)
@@ -415,7 +413,7 @@ struct lua_Debug {
 
 
 /******************************************************************************
-* Copyright (C) 1994-2010 Lua.org, PUC-Rio.  All rights reserved.
+* Copyright (C) 1994-2011 Lua.org, PUC-Rio.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.150 2010/11/10 17:38:10 roberto Exp roberto $
+** $Id: luaconf.h,v 1.169 2011/11/30 12:35:05 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -29,12 +29,13 @@
 #endif
 
 
-#if !defined(LUA_ANSI) && defined(_WIN32)
-#define LUA_WIN
+#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
 
 
@@ -43,12 +44,18 @@
 #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 hexa 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		/* does not need -ldl */
 #define LUA_USE_READLINE	/* needs an extra library: -lreadline */
+#define LUA_USE_STRTODHEX	/* assume 'strtod' handles hexa formats */
+#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
+#define LUA_USE_LONGLONG	/* assume support for long long */
 #endif
 
 
@@ -63,6 +70,7 @@
 #define LUA_USE_ISATTY
 #define LUA_USE_POPEN
 #define LUA_USE_ULONGJMP
+#define LUA_USE_GMTIME_R
 #endif
 
 
@@ -166,13 +174,8 @@
 ** give a warning about it. To avoid these warnings, change to the
 ** default definition.
 */
-#if defined(luaall_c)		/* { */
-#define LUAI_FUNC	static
-#define LUAI_DDEC	static
-#define LUAI_DDEF	static
-
-#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
-      defined(__ELF__)
+#if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
+    defined(__ELF__)		/* { */
 #define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
 #define LUAI_DDEC	LUAI_FUNC
 #define LUAI_DDEF	/* empty */
@@ -202,10 +205,15 @@
 
 
 /*
-@@ luai_writestring defines how 'print' prints its results.
+@@ 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.
@@ -237,6 +245,12 @@
 */
 #define LUA_COMPAT_UNPACK
 
+/*
+@@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
+** You can replace it with 'package.searchers'.
+*/
+#define LUA_COMPAT_LOADERS
+
 /*
 @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
 ** You can call your C function directly (with light C functions).
@@ -253,6 +267,12 @@
 */
 #define LUA_COMPAT_LOG10
 
+/*
+@@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
+** library. You can rewrite 'loadstring(s)' as 'load(s)'.
+*/
+#define LUA_COMPAT_LOADSTRING
+
 /*
 @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
 */
@@ -371,21 +391,34 @@
 @@ 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.
-@@ lua_str2number converts a string to a number.
 */
 #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 */
+
+
+/*
+@@ lua_str2number converts a decimal numeric string to a number.
+@@ lua_strx2number converts an hexadecimal numeric string to a number.
+** In C99, 'strtod' do 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) || defined(luaall_c)
+#if defined(lobject_c) || defined(lvm_c)
 #include <math.h>
 #define luai_nummod(L,a,b)	((a) - floor((a)/(b))*(b))
 #define luai_numpow(L,a,b)	(pow(a,b))
@@ -426,7 +459,7 @@
 
 /* On a Microsoft compiler on a Pentium, use assembler to avoid clashes
    with a DirectX idiosyncrasy */
-#if defined(_MSC_VER) && defined(M_IX86)		/* { */
+#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86)	/* { */
 
 #define MS_ASMTRICK
 
@@ -438,11 +471,11 @@
 
 /*
 @@ 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.
+** (0 for little endian, 1 for big endian); if not defined, Lua will
+** check it dynamically.
 */
 /* check for known architectures */
-#if defined(__i386__) || defined(__i386) || defined(i386) || \
+#if defined(__i386__) || defined(__i386) || defined(__X86__) || \
     defined (__x86_64)
 #define LUA_IEEEENDIAN	0
 #elif defined(__POWERPC__) || defined(__ppc__)
@@ -458,6 +491,29 @@
 /* }================================================================== */
 
 
+/*
+@@ LUA_NANTRICK_LE/LUA_NANTRICK_BE 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).
+*/
+#if defined(LUA_CORE) && \
+    defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI)	/* { */
+
+/* little-endian architectures that satisfy those conditions */
+#if defined(__i386__) || defined(__i386) || defined(__X86__) || \
+    defined(_M_IX86)
+
+#define LUA_NANTRICK_LE
+
+#endif
+
+#endif							/* } */
+
+
 
 
 /* =================================================================== */

lualib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h,v 1.40 2010/06/10 21:29:47 roberto Exp roberto $
+** $Id: lualib.h,v 1.42 2011/05/25 14:12:28 roberto Exp roberto $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -11,9 +11,6 @@
 #include "lua.h"
 
 
-/* Key to file-handle type */
-#define LUA_FILEHANDLE		"FILE*"
-
 
 LUAMOD_API int (luaopen_base) (lua_State *L);
 
@@ -50,7 +47,7 @@ LUALIB_API void (luaL_openlibs) (lua_State *L);
 
 
 
-#ifndef lua_assert
+#if !defined(lua_assert)
 #define lua_assert(x)	((void)0)
 #endif
 

lundump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c,v 1.67 2010/10/13 21:04:52 lhf Exp $
+** $Id: lundump.c,v 1.71 2011/12/07 10:39:12 lhf Exp lhf $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -38,9 +38,13 @@ static void error(LoadState* S, const char* why)
 #define LoadVar(S,x)		LoadMem(S,&x,1,sizeof(x))
 #define LoadVector(S,b,n,size)	LoadMem(S,b,n,size)
 
+#if !defined(luai_verifycode)
+#define luai_verifycode(L,b,f)	(f)
+#endif
+
 static void LoadBlock(LoadState* S, void* b, size_t size)
 {
- if (luaZ_read(S->Z,b,size)!=0) error(S,"corrupted");
+ if (luaZ_read(S->Z,b,size)!=0) error(S,"truncated");
 }
 
 static int LoadChar(LoadState* S)
@@ -54,6 +58,7 @@ static int LoadInt(LoadState* S)
 {
  int x;
  LoadVar(S,x);
+ if (x<0) error(S,"corrupted");
  return x;
 }
 
@@ -73,7 +78,7 @@ static TString* LoadString(LoadState* S)
  else
  {
   char* s=luaZ_openspace(S->L,S->b,size);
-  LoadBlock(S,s,size);
+  LoadBlock(S,s,size*sizeof(char));
   return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */
  }
 }
@@ -131,8 +136,8 @@ static void LoadUpvalues(LoadState* S, Proto* f)
  for (i=0; i<n; i++) f->upvalues[i].name=NULL;
  for (i=0; i<n; i++)
  {
-  f->upvalues[i].instack=LoadChar(S);
-  f->upvalues[i].idx=LoadChar(S);
+  f->upvalues[i].instack=LoadByte(S);
+  f->upvalues[i].idx=LoadByte(S);
  }
 }
 
@@ -175,13 +180,23 @@ static Proto* LoadFunction(LoadState* S)
  return 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 LoadHeader(LoadState* S)
 {
- char h[LUAC_HEADERSIZE];
- char s[LUAC_HEADERSIZE];
+ lu_byte h[LUAC_HEADERSIZE];
+ lu_byte s[LUAC_HEADERSIZE];
  luaU_header(h);
- LoadBlock(S,s,LUAC_HEADERSIZE);
- if (memcmp(h,s,LUAC_HEADERSIZE)!=0) error(S,"incompatible");
+ 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");
 }
 
 /*
@@ -200,25 +215,30 @@ Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
  S.Z=Z;
  S.b=buff;
  LoadHeader(&S);
- return LoadFunction(&S);
+ return luai_verifycode(L,buff,LoadFunction(&S));
 }
 
+#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
-* if you make any changes in the header or in LUA_SIGNATURE,
-* be sure to update LUAC_HEADERSIZE accordingly in lundump.h.
+* 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 (char* h)
+void luaU_header (lu_byte* h)
 {
  int x=1;
- memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-1);
- h+=sizeof(LUA_SIGNATURE)-1;
- *h++=(char)LUAC_VERSION;
- *h++=(char)LUAC_FORMAT;
- *h++=(char)*(char*)&x;				/* endianness */
- *h++=(char)sizeof(int);
- *h++=(char)sizeof(size_t);
- *h++=(char)sizeof(Instruction);
- *h++=(char)sizeof(lua_Number);
- *h++=(char)(((lua_Number)0.5)==0);		/* is lua_Number integral? */
+ 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 1.39 2005/11/01 17:04:55 lhf Exp lhf $
+** $Id: lundump.h,v 1.44 2011/05/06 13:35:17 lhf Exp $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -14,23 +14,15 @@
 LUAI_FUNC Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
 
 /* make header; from lundump.c */
-LUAI_FUNC void luaU_header (char* h);
+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);
 
-#ifdef luac_c
-/* print one chunk; from print.c */
-LUAI_FUNC void luaU_print (const Proto* f, int full);
-#endif
+/* data to catch conversion errors */
+#define LUAC_TAIL		"\x19\x93\r\n\x1a\n"
 
-/* for header of binary files -- this is Lua 5.1 */
-#define LUAC_VERSION		0x51
-
-/* for header of binary files -- this is the official format */
-#define LUAC_FORMAT		0
-
-/* size of header of binary files */
-#define LUAC_HEADERSIZE		12
+/* size in bytes of header of binary files */
+#define LUAC_HEADERSIZE		(sizeof(LUA_SIGNATURE)-sizeof(char)+2+6+sizeof(LUAC_TAIL)-sizeof(char))
 
 #endif

lvm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 2.124 2010/10/25 19:01:37 roberto Exp roberto $
+** $Id: lvm.c,v 2.146 2011/11/29 15:54:38 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -35,7 +35,7 @@
 const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
   lua_Number num;
   if (ttisnumber(obj)) return obj;
-  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
+  if (ttisstring(obj) && luaO_str2d(svalue(obj), tsvalue(obj)->len, &num)) {
     setnvalue(n, num);
     return n;
   }
@@ -65,7 +65,7 @@ static void traceexec (lua_State *L) {
     luaD_hook(L, LUA_HOOKCOUNT, -1);
   }
   if (mask & LUA_MASKLINE) {
-    Proto *p = ci_func(ci)->l.p;
+    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, */
@@ -127,29 +127,38 @@ void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
 
 void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
   int loop;
-  TValue temp;
   for (loop = 0; loop < MAXTAGLOOP; loop++) {
     const TValue *tm;
     if (ttistable(t)) {  /* `t' is a table? */
       Table *h = hvalue(t);
-      TValue *oldval = luaH_set(L, h, key); /* do a primitive set */
-      if (!ttisnil(oldval) ||  /* result is not nil? */
-          (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
-        setobj2t(L, oldval, val);
+      TValue *oldval = cast(TValue *, luaH_get(h, key));
+      /* if previous value is not nil, there must be a previous entry
+         in the table; moreover, a metamethod has no relevance */
+      if (!ttisnil(oldval) ||
+         /* previous value is nil; must check the metamethod */
+         ((tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL &&
+         /* no metamethod; is there a previous entry in the table? */
+         (oldval != luaO_nilobject ||
+         /* no previous entry; must create one. (The next test is
+            always true; we only need the assignment.) */
+         (oldval = luaH_newkey(L, h, key), 1)))) {
+        /* no metamethod and (now) there is an entry with given key */
+        setobj2t(L, oldval, val);  /* assign new value to that entry */
+        invalidateTMcache(h);
         luaC_barrierback(L, obj2gco(h), val);
         return;
       }
-      /* else will try the tag method */
+      /* else will try the metamethod */
     }
-    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
-      luaG_typeerror(L, t, "index");
+    else  /* not a table; check metamethod */
+      if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
+        luaG_typeerror(L, t, "index");
+    /* there is a metamethod */
     if (ttisfunction(tm)) {
       callTM(L, tm, t, key, val, 0);
       return;
     }
-    /* else repeat with 'tm' */
-    setobj(L, &temp, tm);  /* avoid pointing inside table (may rehash) */
-    t = &temp;
+    t = tm;  /* else repeat with 'tm' */
   }
   luaG_runerror(L, "loop in settable");
 }
@@ -161,7 +170,6 @@ static int call_binTM (lua_State *L, const TValue *p1, const TValue *p2,
   if (ttisnil(tm))
     tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
   if (ttisnil(tm)) return 0;
-  if (event == TM_UNM) p2 = luaO_nilobject;
   callTM(L, tm, p1, p2, res, 1);
   return 1;
 }
@@ -175,7 +183,7 @@ static const TValue *get_equalTM (lua_State *L, Table *mt1, Table *mt2,
   if (mt1 == mt2) return tm1;  /* same metatables => same metamethods */
   tm2 = fasttm(L, mt2, event);
   if (tm2 == NULL) return NULL;  /* no metamethod */
-  if (luaO_rawequalObj(tm1, tm2))  /* same metamethods? */
+  if (luaV_rawequalobj(tm1, tm2))  /* same metamethods? */
     return tm1;
   return NULL;
 }
@@ -218,9 +226,9 @@ int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
     return luai_numlt(L, nvalue(l), nvalue(r));
   else if (ttisstring(l) && ttisstring(r))
     return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
-  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
-    return res;
-  return luaG_ordererror(L, l, r);
+  else if ((res = call_orderTM(L, l, r, TM_LT)) < 0)
+    luaG_ordererror(L, l, r);
+  return res;
 }
 
 
@@ -230,17 +238,20 @@ int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r) {
     return luai_numle(L, nvalue(l), nvalue(r));
   else if (ttisstring(l) && ttisstring(r))
     return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
-  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
+  else if ((res = call_orderTM(L, l, r, TM_LE)) >= 0)  /* first try `le' */
     return res;
-  else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */
-    return !res;
-  return luaG_ordererror(L, l, r);
+  else if ((res = call_orderTM(L, r, l, TM_LT)) < 0)  /* else try `lt' */
+    luaG_ordererror(L, l, r);
+  return !res;
 }
 
 
-int luaV_equalval_ (lua_State *L, const TValue *t1, const TValue *t2) {
+/*
+** equality of Lua values. L == NULL means raw equality (no metamethods)
+*/
+int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2) {
   const TValue *tm;
-  lua_assert(ttype(t1) == ttype(t2));
+  lua_assert(ttisequal(t1, t2));
   switch (ttype(t1)) {
     case LUA_TNIL: return 1;
     case LUA_TNUMBER: return luai_numeq(nvalue(t1), nvalue(t2));
@@ -250,15 +261,19 @@ int luaV_equalval_ (lua_State *L, const TValue *t1, const TValue *t2) {
     case LUA_TSTRING: return eqstr(rawtsvalue(t1), rawtsvalue(t2));
     case LUA_TUSERDATA: {
       if (uvalue(t1) == uvalue(t2)) return 1;
+      else if (L == NULL) return 0;
       tm = get_equalTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable, TM_EQ);
       break;  /* will try TM */
     }
     case LUA_TTABLE: {
       if (hvalue(t1) == hvalue(t2)) return 1;
+      else if (L == NULL) return 0;
       tm = get_equalTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
       break;  /* will try TM */
     }
-    default: return gcvalue(t1) == gcvalue(t2);
+    default:
+      lua_assert(iscollectable(t1));
+      return gcvalue(t1) == gcvalue(t2);
   }
   if (tm == NULL) return 0;  /* no TM? */
   callTM(L, tm, t1, t2, L->top, 1);  /* call TM */
@@ -286,18 +301,20 @@ void luaV_concat (lua_State *L, int total) {
       char *buffer;
       int i;
       /* collect total length */
-      for (n = 1; n < total && tostring(L, top-n-1); n++) {
-        size_t l = tsvalue(top-n-1)->len;
-        if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
+      for (i = 1; i < total && tostring(L, top-i-1); i++) {
+        size_t l = tsvalue(top-i-1)->len;
+        if (l >= (MAX_SIZET/sizeof(char)) - tl)
+          luaG_runerror(L, "string length overflow");
         tl += l;
       }
       buffer = luaZ_openspace(L, &G(L)->buff, tl);
       tl = 0;
-      for (i=n; i>0; i--) {  /* concat all strings */
+      n = i;
+      do {  /* concat all strings */
         size_t l = tsvalue(top-i)->len;
-        memcpy(buffer+tl, svalue(top-i), l);
+        memcpy(buffer+tl, svalue(top-i), l * sizeof(char));
         tl += l;
-      }
+      } while (--i > 0);
       setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
     }
     total -= n-1;  /* got 'n' strings to create 1 new */
@@ -308,7 +325,7 @@ void luaV_concat (lua_State *L, int total) {
 
 void luaV_objlen (lua_State *L, StkId ra, const TValue *rb) {
   const TValue *tm;
-  switch (ttype(rb)) {
+  switch (ttypenv(rb)) {
     case LUA_TTABLE: {
       Table *h = hvalue(rb);
       tm = fasttm(L, h->metatable, TM_LEN);
@@ -327,7 +344,7 @@ void luaV_objlen (lua_State *L, StkId ra, const TValue *rb) {
       break;
     }
   }
-  callTM(L, tm, rb, luaO_nilobject, ra, 1);
+  callTM(L, tm, rb, rb, ra, 1);
 }
 
 
@@ -378,7 +395,7 @@ static void pushclosure (lua_State *L, Proto *p, UpVal **encup, StkId base,
   Upvaldesc *uv = p->upvalues;
   int i;
   Closure *ncl = luaF_newLclosure(L, p);
-  setclvalue(L, ra, ncl);  /* anchor new closure in stack */
+  setclLvalue(L, ra, ncl);  /* anchor new closure in stack */
   for (i = 0; i < nup; i++) {  /* fill in its upvalues */
     if (uv[i].instack)  /* upvalue refers to local variable? */
       ncl->l.upvals[i] = luaF_findupval(L, base + uv[i].idx);
@@ -454,6 +471,11 @@ void luaV_finishOp (lua_State *L) {
 ** some macros for common tasks in `luaV_execute'
 */
 
+#if !defined luai_runtimecheck
+#define luai_runtimecheck(L, c)		/* void */
+#endif
+
+
 #define RA(i)	(base+GETARG_A(i))
 /* to be used after possible stack reallocation */
 #define RB(i)	check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
@@ -466,12 +488,19 @@ void luaV_finishOp (lua_State *L) {
   (k + (GETARG_Bx(i) != 0 ? GETARG_Bx(i) - 1 : GETARG_Ax(*ci->u.l.savedpc++)))
 
 
-#define dojump(i)	(ci->u.l.savedpc += (i))
+/* execute a jump instruction */
+#define dojump(ci,i,e) \
+  { int a = GETARG_A(i); \
+    if (a > 0) luaF_close(L, ci->u.l.base + a - 1); \
+    ci->u.l.savedpc += GETARG_sBx(i) + e; }
+
+/* for test instructions, execute the jump instruction that follows it */
+#define donextjump(ci)	{ i = *ci->u.l.savedpc; dojump(ci, i, 1); }
 
 
 #define Protect(x)	{ {x;}; base = ci->u.l.base; }
 
-#define checkGC(L)	Protect(luaC_checkGC(L); luai_threadyield(L);)
+#define checkGC(L,c)	Protect(luaC_condGC(L, c); luai_threadyield(L);)
 
 
 #define arith_op(op,tm) { \
@@ -486,6 +515,7 @@ void luaV_finishOp (lua_State *L) {
 
 #define vmdispatch(o)	switch(o)
 #define vmcase(l,b)	case l: {b}  break;
+#define vmcasenb(l,b)	case l: {b}		/* nb = no break */
 
 void luaV_execute (lua_State *L) {
   CallInfo *ci = L->ci;
@@ -493,9 +523,8 @@ void luaV_execute (lua_State *L) {
   TValue *k;
   StkId base;
  newframe:  /* reentry point when frame changes (call/return) */
-  lua_assert(isLua(ci));
   lua_assert(ci == L->ci);
-  cl = &clvalue(ci->func)->l;
+  cl = clLvalue(ci->func);
   k = cl->p->k;
   base = ci->u.l.base;
   /* main loop of interpreter */
@@ -506,7 +535,7 @@ void luaV_execute (lua_State *L) {
         (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
       Protect(traceexec(L));
     }
-    /* warning!! several calls may realloc the stack and invalidate `ra' */
+    /* WARNING: several calls may realloc the stack and invalidate `ra' */
     ra = RA(i);
     lua_assert(base == ci->u.l.base);
     lua_assert(base <= L->top && L->top < L->stack + L->stacksize);
@@ -515,7 +544,13 @@ void luaV_execute (lua_State *L) {
         setobjs2s(L, ra, RB(i));
       )
       vmcase(OP_LOADK,
-        TValue *rb = KBx(i);
+        TValue *rb = k + GETARG_Bx(i);
+        setobj2s(L, ra, rb);
+      )
+      vmcase(OP_LOADKX,
+        TValue *rb;
+        lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_EXTRAARG);
+        rb = k + GETARG_Ax(*ci->u.l.savedpc++);
         setobj2s(L, ra, rb);
       )
       vmcase(OP_LOADBOOL,
@@ -523,10 +558,10 @@ void luaV_execute (lua_State *L) {
         if (GETARG_C(i)) ci->u.l.savedpc++;  /* skip next instruction (if C) */
       )
       vmcase(OP_LOADNIL,
-        TValue *rb = RB(i);
+        int b = GETARG_B(i);
         do {
-          setnilvalue(rb--);
-        } while (rb >= ra);
+          setnilvalue(ra++);
+        } while (b--);
       )
       vmcase(OP_GETUPVAL,
         int b = GETARG_B(i);
@@ -558,7 +593,11 @@ void luaV_execute (lua_State *L) {
         sethvalue(L, ra, t);
         if (b != 0 || c != 0)
           luaH_resize(L, t, luaO_fb2int(b), luaO_fb2int(c));
-        checkGC(L);
+        checkGC(L,
+          L->top = ra + 1;  /* limit of live values */
+          luaC_step(L);
+          L->top = ci->top;  /* restore top */
+        )
       )
       vmcase(OP_SELF,
         StkId rb = RB(i);
@@ -594,7 +633,8 @@ void luaV_execute (lua_State *L) {
         }
       )
       vmcase(OP_NOT,
-        int res = l_isfalse(RB(i));  /* next assignment may change this value */
+        TValue *rb = RB(i);
+        int res = l_isfalse(rb);  /* next assignment may change this value */
         setbvalue(ra, res);
       )
       vmcase(OP_LEN,
@@ -603,49 +643,61 @@ void luaV_execute (lua_State *L) {
       vmcase(OP_CONCAT,
         int b = GETARG_B(i);
         int c = GETARG_C(i);
+        StkId rb;
         L->top = base + c + 1;  /* mark the end of concat operands */
-        Protect(luaV_concat(L, c-b+1); checkGC(L);)
+        Protect(luaV_concat(L, c - b + 1));
+        ra = RA(i);  /* 'luav_concat' may invoke TMs and move the stack */
+        rb = b + base;
+        setobjs2s(L, ra, rb);
+        checkGC(L,
+          L->top = (ra >= rb ? ra + 1 : rb);  /* limit of live values */
+          luaC_step(L);
+        )
         L->top = ci->top;  /* restore top */
-        setobjs2s(L, RA(i), base+b);
       )
       vmcase(OP_JMP,
-        dojump(GETARG_sBx(i));
+        dojump(ci, i, 0);
       )
       vmcase(OP_EQ,
         TValue *rb = RKB(i);
         TValue *rc = RKC(i);
         Protect(
-          if (equalobj(L, rb, rc) == GETARG_A(i))
-            dojump(GETARG_sBx(*ci->u.l.savedpc));
+          if (cast_int(equalobj(L, rb, rc)) != GETARG_A(i))
+            ci->u.l.savedpc++;
+          else
+            donextjump(ci);
         )
-        ci->u.l.savedpc++;
       )
       vmcase(OP_LT,
         Protect(
-          if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
-            dojump(GETARG_sBx(*ci->u.l.savedpc));
+          if (luaV_lessthan(L, RKB(i), RKC(i)) != GETARG_A(i))
+            ci->u.l.savedpc++;
+          else
+            donextjump(ci);
         )
-        ci->u.l.savedpc++;
       )
       vmcase(OP_LE,
         Protect(
-          if (luaV_lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
-            dojump(GETARG_sBx(*ci->u.l.savedpc));
+          if (luaV_lessequal(L, RKB(i), RKC(i)) != GETARG_A(i))
+            ci->u.l.savedpc++;
+          else
+            donextjump(ci);
         )
-        ci->u.l.savedpc++;
       )
       vmcase(OP_TEST,
-        if (GETARG_C(i) ? !l_isfalse(ra) : l_isfalse(ra))
-          dojump(GETARG_sBx(*ci->u.l.savedpc));
-        ci->u.l.savedpc++;
+        if (GETARG_C(i) ? l_isfalse(ra) : !l_isfalse(ra))
+            ci->u.l.savedpc++;
+          else
+          donextjump(ci);
       )
       vmcase(OP_TESTSET,
         TValue *rb = RB(i);
-        if (GETARG_C(i) ? !l_isfalse(rb) : l_isfalse(rb)) {
+        if (GETARG_C(i) ? l_isfalse(rb) : !l_isfalse(rb))
+          ci->u.l.savedpc++;
+        else {
           setobjs2s(L, ra, rb);
-          dojump(GETARG_sBx(*ci->u.l.savedpc));
+          donextjump(ci);
         }
-        ci->u.l.savedpc++;
       )
       vmcase(OP_CALL,
         int b = GETARG_B(i);
@@ -690,7 +742,7 @@ void luaV_execute (lua_State *L) {
           goto newframe;  /* restart luaV_execute over new Lua function */
         }
       )
-      vmcase(OP_RETURN,
+      vmcasenb(OP_RETURN,
         int b = GETARG_B(i);
         if (b != 0) L->top = ra+b-1;
         if (cl->p->sizep > 0) luaF_close(L, base);
@@ -711,7 +763,7 @@ void luaV_execute (lua_State *L) {
         lua_Number limit = nvalue(ra+1);
         if (luai_numlt(L, 0, step) ? luai_numle(L, idx, limit)
                                    : luai_numle(L, limit, idx)) {
-          dojump(GETARG_sBx(i));  /* jump back */
+          ci->u.l.savedpc += GETARG_sBx(i);  /* jump back */
           setnvalue(ra, idx);  /* update internal index... */
           setnvalue(ra+3, idx);  /* ...and external index */
         }
@@ -727,9 +779,9 @@ void luaV_execute (lua_State *L) {
         else if (!tonumber(pstep, ra+2))
           luaG_runerror(L, LUA_QL("for") " step must be a number");
         setnvalue(ra, luai_numsub(L, nvalue(ra), nvalue(pstep)));
-        dojump(GETARG_sBx(i));
+        ci->u.l.savedpc += GETARG_sBx(i);
       )
-      vmcase(OP_TFORCALL,
+      vmcasenb(OP_TFORCALL,
         StkId cb = ra + 3;  /* call base */
         setobjs2s(L, cb+2, ra+2);
         setobjs2s(L, cb+1, ra+1);
@@ -746,7 +798,7 @@ void luaV_execute (lua_State *L) {
         l_tforloop:
         if (!ttisnil(ra + 1)) {  /* continue loop? */
           setobjs2s(L, ra, ra + 1);  /* save control variable */
-          dojump(GETARG_sBx(i));  /* jump back */
+           ci->u.l.savedpc += GETARG_sBx(i);  /* jump back */
         }
       )
       vmcase(OP_SETLIST,
@@ -759,28 +811,30 @@ void luaV_execute (lua_State *L) {
           lua_assert(GET_OPCODE(*ci->u.l.savedpc) == OP_EXTRAARG);
           c = GETARG_Ax(*ci->u.l.savedpc++);
         }
+        luai_runtimecheck(L, ttistable(ra));
         h = hvalue(ra);
         last = ((c-1)*LFIELDS_PER_FLUSH) + n;
         if (last > h->sizearray)  /* needs more space? */
           luaH_resizearray(L, h, last);  /* pre-allocate it at once */
         for (; n > 0; n--) {
           TValue *val = ra+n;
-          setobj2t(L, luaH_setint(L, h, last--), val);
+          luaH_setint(L, h, last--, val);
           luaC_barrierback(L, obj2gco(h), val);
         }
         L->top = ci->top;  /* correct top (in case of previous open call) */
       )
-      vmcase(OP_CLOSE,
-        luaF_close(L, ra);
-      )
       vmcase(OP_CLOSURE,
         Proto *p = cl->p->p[GETARG_Bx(i)];
         Closure *ncl = getcached(p, cl->upvals, base);  /* cached closure */
         if (ncl == NULL)  /* no match? */
           pushclosure(L, p, cl->upvals, base, ra);  /* create a new one */
         else
-          setclvalue(L, ra, ncl);  /* push cashed closure */
-        checkGC(L);
+          setclLvalue(L, ra, ncl);  /* push cashed closure */
+        checkGC(L,
+          L->top = ra + 1;  /* limit of live values */
+          luaC_step(L);
+          L->top = ci->top;  /* restore top */
+        )
       )
       vmcase(OP_VARARG,
         int b = GETARG_B(i) - 1;

lvm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 2.13 2009/11/19 19:04:58 roberto Exp roberto $
+** $Id: lvm.h,v 2.16 2011/05/31 18:24:36 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -17,12 +17,15 @@
 
 #define tonumber(o,n)	(ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL))
 
-#define equalobj(L,o1,o2) \
-	(ttype(o1) == ttype(o2) && luaV_equalval_(L, o1, o2))
+#define equalobj(L,o1,o2)  (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2))
+
+#define luaV_rawequalobj(t1,t2)  \
+        (ttisequal(t1,t2) && luaV_equalobj_(NULL,t1,t2))
 
 
 /* not to called directly */
-LUAI_FUNC int luaV_equalval_ (lua_State *L, const TValue *t1, const TValue *t2);
+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);

lzio.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.c,v 1.30 2005/05/17 19:49:15 roberto Exp roberto $
+** $Id: lzio.c,v 1.33 2011/02/23 13:13:10 roberto Exp roberto $
 ** a generic input stream interface
 ** See Copyright Notice in lua.h
 */
@@ -25,23 +25,11 @@ int luaZ_fill (ZIO *z) {
   lua_unlock(L);
   buff = z->reader(L, z->data, &size);
   lua_lock(L);
-  if (buff == NULL || size == 0) return EOZ;
-  z->n = size - 1;
+  if (buff == NULL || size == 0)
+    return EOZ;
+  z->n = size - 1;  /* discount char being returned */
   z->p = buff;
-  return char2int(*(z->p++));
-}
-
-
-int luaZ_lookahead (ZIO *z) {
-  if (z->n == 0) {
-    if (luaZ_fill(z) == EOZ)
-      return EOZ;
-    else {
-      z->n++;  /* luaZ_fill removed first byte; put back it */
-      z->p--;
-    }
-  }
-  return char2int(*z->p);
+  return cast_uchar(*(z->p++));
 }
 
 
@@ -58,8 +46,14 @@ void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
 size_t luaZ_read (ZIO *z, void *b, size_t n) {
   while (n) {
     size_t m;
-    if (luaZ_lookahead(z) == EOZ)
-      return n;  /* return number of missing bytes */
+    if (z->n == 0) {  /* no bytes in buffer? */
+      if (luaZ_fill(z) == EOZ)  /* try to read more */
+        return n;  /* no more input; return number of missing bytes */
+      else {
+        z->n++;  /* luaZ_fill consumed first byte; put it back */
+        z->p--;
+      }
+    }
     m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */
     memcpy(b, z->p, m);
     z->n -= m;

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.21 2005/05/17 19:49:15 roberto Exp roberto $
+** $Id: lzio.h,v 1.25 2011/07/15 12:35:32 roberto Exp roberto $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -17,11 +17,7 @@
 
 typedef struct Zio ZIO;
 
-#define char2int(c)	cast(int, cast(unsigned char, (c)))
-
-#define zgetc(z)  (((z)->n--)>0 ?  char2int(*(z)->p++) : luaZ_fill(z))
-
-#define zungetc(z)	((z)->n++, (z)->p--)
+#define zgetc(z)  (((z)->n--)>0 ?  cast_uchar(*(z)->p++) : luaZ_fill(z))
 
 
 typedef struct Mbuffer {
@@ -50,7 +46,6 @@ 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 int luaZ_lookahead (ZIO *z);
 
 
 
@@ -59,7 +54,7 @@ LUAI_FUNC int luaZ_lookahead (ZIO *z);
 struct Zio {
   size_t n;			/* bytes still unread */
   const char *p;		/* current position in buffer */
-  lua_Reader reader;
+  lua_Reader reader;		/* reader function */
   void* data;			/* additional data */
   lua_State *L;			/* Lua state (for reader) */
 };

makefile

@@ -18,9 +18,9 @@ CWARNSC=-pedantic -Wextra \
 	-Wstrict-aliasing \
         # the next warnings generate to much noise, so they are disabled
 	# -Wlogical-op \
+	# -Wstrict-overflow=2 \
 	# -Wformat=2 \
-	# -Wstrict-overflow=5 \
-	#  -Wcast-qual \
+	# -Wcast-qual \
 
 # The next warnings are not valid for C++
 CWARNS= $(CWARNSC) \
@@ -35,14 +35,17 @@ CWARNS= $(CWARNSC) \
 # -DEXTERNMEMCHECK -DHARDSTACKTESTS -DHARDMEMTESTS  -DTRACEMEM='"tempmem"'
 # -g -DLUA_USER_H='"ltests.h"'
 # -fomit-frame-pointer #-pg -malign-double
-TESTS= -DLUA_USER_H='"ltests.h"'  # -g -O0
+# -DLUA_USE_CTYPE  -DLUA_USE_APICHECK
+TESTS= -DLUA_USER_H='"ltests.h"'
+
+# -mtune=native -fomit-frame-pointer 
+LOCAL = $(TESTS) $(CWARNS) -g
 
-LOCAL = $(TESTS) $(CWARNS)
 
 
 # enable Linux goodies
-MYCFLAGS= $(LOCAL) -DLUA_USE_LINUX -DLUA_COMPAT_ALL -g
-MYLDFLAGS= -Wl,-E -g
+MYCFLAGS= $(LOCAL) -DLUA_USE_LINUX -DLUA_COMPAT_ALL
+MYLDFLAGS= $(LOCAL) -Wl,-E
 MYLIBS= -ldl -lreadline -lhistory -lncurses
 
 
@@ -116,6 +119,7 @@ echo:
 $(ALL_O): makefile
 
 # DO NOT DELETE
+# automatically made with 'gcc -MM'
 
 lapi.o: lapi.c 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 \