detail (using 'sizeof' instead of 'strlen' for length of a constant

string)

bugs

@@ -179,13 +179,13 @@ Tue May  2 15:27:58 EST 2000
 ** lparser.c
 Fri May 12 15:11:12 EST 2000
 >> first element in a list constructor is not adjusted to one value
->> (e.g. «a = {gsub('a','a','')}»)
+>> (e.g. «a = {gsub('a','a','')}»)
 (by Tomas; since 4.0a)
 
 ** lparser.c
 Wed May 24 14:50:16 EST 2000
 >> record-constructor starting with an upvalue name gets an error
->> (e.g. «local a; function f() x = {a=1} end»)
+>> (e.g. «local a; function f() x = {a=1} end»)
 (by Edgar Toernig; since 3.1)
 
 ** lparser.c
@@ -226,7 +226,7 @@ Wed Sep 27 09:50:19 EST 2000
 ** llex.h / llex.c / lparser.c
 Wed Sep 27 13:39:45 EST 2000
 >> parser overwrites semantic information when looking ahead
->> (e.g. «a = {print'foo'}»)
+>> (e.g. «a = {print'foo'}»)
 (by Edgar Toernig; since 4.0b, deriving from previous bug)
 
 ** liolib.c
@@ -257,7 +257,7 @@ Thu Feb  1 11:55:45 EDT 2001
 
 ** ldo.c
 Fri Feb  2 14:06:40 EDT 2001
->> «while 1 dostring[[print('hello\n')]] end» never reclaims memory
+>> «while 1 dostring[[print('hello\n')]] end» never reclaims memory
 (by Andrew Paton; since 4.0b)
 
 ** lbaselib.c
@@ -1375,7 +1375,7 @@ patch = [[
 Bug{
 what = [[As a library, loadlib.c should not access Lua internals
 (via lobject.h)]],
-report = [[Jérôme Vuarand, on 03/2007]],
+report = [[Jérôme Vuarand, on 03/2007]],
 since = [[5.0]],
 example = [[the bug has no effect on external behavior]],
 patch = [[remove the '#include "lobject.h" and use
@@ -1880,8 +1880,8 @@ patch = [[
 +++ lundump.c   2008/04/04 19:51:41     2.7.1.4
 @@ -1,5 +1,5 @@
  /*
--** $Id: bugs,v 1.119 2012/12/03 20:18:02 roberto Exp roberto $
+-** $Id: bugs,v 1.132 2014/05/07 16:57:27 roberto Exp roberto $
-+** $Id: bugs,v 1.119 2012/12/03 20:18:02 roberto Exp roberto $
++** $Id: bugs,v 1.132 2014/05/07 16:57:27 roberto Exp roberto $
  ** load precompiled Lua chunks
  ** See Copyright Notice in lua.h
  */
@@ -2409,6 +2409,57 @@ patch = [[
 }
 
 
+Bug{
+what = [[When loading a file,
+Lua may call the reader function again after it returned end of input
+]],
+report = [[Chris Howie, 2013/06/05]],
+since = [[5.1]],
+fix = [[5.2]],
+example = [[
+load(function () print("called"); return nil end)
+--> called
+--> called             (should be called only once!)
+]],
+patch = [[
+--- lzio.h	2007/12/27 13:02:25	1.21.1.1
++++ lzio.h	2013/07/04 13:55:59
+@@ -59,6 +59,7 @@
+   lua_Reader reader;
+   void* data;			/* additional data */
+   lua_State *L;			/* Lua state (for reader) */
++  int eoz;			/* true if reader has no more data */
+ };
+
+
+--- lzio.c	2007/12/27 13:02:25	1.31.1.1
++++ lzio.c	2013/07/04 13:53:06
+@@ -22,10 +22,14 @@
+   size_t size;
+   lua_State *L = z->L;
+   const char *buff;
++  if (z->eoz) return EOZ;
+   lua_unlock(L);
+   buff = z->reader(L, z->data, &size);
+   lua_lock(L);
+-  if (buff == NULL || size == 0) return EOZ;
++  if (buff == NULL || size == 0) {
++    z->eoz = 1;  /* avoid calling reader function next time */
++    return EOZ;
++  }
+   z->n = size - 1;
+   z->p = buff;
+   return char2int(*(z->p++));
+@@ -51,6 +55,7 @@
+   z->data = data;
+   z->n = 0;
+   z->p = NULL;
++  z->eoz = 0;
+ }
+]]
+}
+
+
 -----------------------------------------------------------------
 -- Lua 5.2.0
 
@@ -2699,6 +2750,7 @@ Bug{
 what = [[Some patterns can overflow the C stack, due to recursion]],
 report = [[Tim Starling, 2012/07/08]],
 since = [[2.5]],
+fix = [[5.2.2]],
 example = [[print(string.find(string.rep("a", 2^20), string.rep(".?", 2^20)))]],
 patch = [[
 ]]
@@ -2710,7 +2762,7 @@ what = [['pcall' may not restore previous error function when
 inside coroutines]],
 report = [[Alexander Gavrilov, 2012/06/12]],
 since = [[5.2.0]],
-fix = nil,
+fix = [[5.2.2]],
 example = [[
 function errfunc(x)
   return 'errfunc'
@@ -2765,7 +2817,7 @@ what = [[Check for garbage collector in function calls does not cover
 all paths]],
 report = [[Roberto, 2012/08/15]],
 since = [[5.2.1]],
-fix = nil,
+fix = [[5.2.2]],
 example = [[
 See <a href="http://lua-users.org/lists/lua-l/2012-08/msg00149.html">
 http://lua-users.org/lists/lua-l/2012-08/msg00149.html</a>
@@ -2801,7 +2853,7 @@ what = [[load/loadfile returns wrong result when given an environment
 for a binary chunk with no upvalues]],
 report = [[Vladimir Strakh, 2012/11/28]],
 since = [[5.2.0]],
-fix = nil,
+fix = [[5.2.2]],
 example = [[
 f = load(string.dump(function () return 1 end), nil, "b", {})
 print(type(f))   --> table            (whould be a function)
@@ -2854,6 +2906,349 @@ patch = [[
 ]]
 }
 
+
+
+-----------------------------------------------------------------
+-- Lua 5.2.2
+
+
+Bug{
+what = [[stack overflow in vararg functions with many fixed
+parameters called with few arguments]],
+report = [[云风, 2013/04/17]],
+since = [[5.1]],
+fix = [[5.2.3]],
+example = [[
+function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10,
+           p11, p12, p13, p14, p15, p16, p17, p18, p19, p20,
+           p21, p22, p23, p24, p25, p26, p27, p28, p29, p30,
+           p31, p32, p33, p34, p35, p36, p37, p38, p39, p40,
+           p41, p42, p43, p44, p45, p46, p48, p49, p50, ...)
+  local a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14
+end
+
+f()   -- seg. fault (on some machines)
+]],
+patch = [[
+--- ldo.c	2012/10/01 14:05:04	2.108
++++ ldo.c	2013/04/19 20:56:06
+@@ -324,7 +324,7 @@
+     case LUA_TLCL: {  /* Lua function: prepare its call */
+       StkId base;
+       Proto *p = clLvalue(func)->p;
+-      luaD_checkstack(L, p->maxstacksize);
++      luaD_checkstack(L, p->maxstacksize + p->numparams);
+       func = restorestack(L, funcr);
+       n = cast_int(L->top - func) - 1;  /* number of real arguments */
+       for (; n < p->numparams; n++)
+]],
+}
+
+Bug{
+what = [[garbage collector can trigger too many times in recursive loops]],
+report = [[Roberto, 2013/04/25]],
+since = [[5.2.2]],
+fix = [[5.2.3]],
+example = [[
+function f() f() end
+f()   -- it takes too long before a "stack overflow" error
+]],
+patch = [[
+--- lgc.c	2013/04/12 18:48:47	2.140.1.1
++++ lgc.c	2013/04/25 21:30:20
+@@ -495,2 +495,3 @@
+ static lu_mem traversestack (global_State *g, lua_State *th) {
++  int n = 0;
+   StkId o = th->stack;
+@@ -505,3 +506,9 @@
+   }
+-  return sizeof(lua_State) + sizeof(TValue) * th->stacksize;
++  else {  /* count call infos to compute size */
++    CallInfo *ci;
++    for (ci = &th->base_ci; ci != th->ci; ci = ci->next)
++      n++;
++  }
++  return sizeof(lua_State) + sizeof(TValue) * th->stacksize +
++         sizeof(CallInfo) * n;
+ }
+}
+
+Bug{
+what = [[Wrong assert when reporting concatenation errors
+(manifests only when Lua is compiled in debug mode)]],
+report = [[Roberto, 2013/05/05]],
+since = [[?]],
+fix = [[5.2.3]],
+example = [[
+-- only with Lua compiled in debug mode
+print({} .. 2)
+]],
+patch = [[
+--- ldebug.c	2013/04/12 18:48:47	2.90.1.1
++++ ldebug.c	2013/05/05 14:38:30
+@@ -519,5 +519,5 @@
+ l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+   if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
+-  lua_assert(!ttisstring(p1) && !ttisnumber(p2));
++  lua_assert(!ttisstring(p1) && !ttisnumber(p1));
+   luaG_typeerror(L, p1, "concatenate");
+ }
+]]
+}
+
+Bug{
+what = [[Wrong error message in some short-cut expressions]],
+report = [[Egor Skriptunoff, 2013/05/10]],
+since = [[5.0]],
+fix = [[5.2.3]],
+example = [[
+> a,b,c = true,true,true
+> (a and b or c)('', '')
+stdin:1: attempt to call a boolean value (global 'c')
+
+    (It should be global 'b' instead of 'c'.)
+]],
+patch = [[
+--- ldebug.c	2013/05/06 17:20:22	2.90.1.2
++++ ldebug.c	2013/05/14 19:52:48
+@@ -327,12 +327,20 @@
+ }
+ 
+ 
++static int filterpc (int pc, int jmptarget) {
++  if (pc < jmptarget)  /* is code conditional (inside a jump)? */
++    return -1;  /* cannot know who sets that register */
++  else return pc;  /* current position sets that register */
++}
++
++
+ /*
+ ** try to find last instruction before 'lastpc' that modified register 'reg'
+ */
+ static int findsetreg (Proto *p, int lastpc, int reg) {
+   int pc;
+   int setreg = -1;  /* keep last instruction that changed 'reg' */
++  int jmptarget = 0;  /* any code before this address is conditional */
+   for (pc = 0; pc < lastpc; pc++) {
+     Instruction i = p->code[pc];
+     OpCode op = GET_OPCODE(i);
+@@ -341,33 +349,38 @@
+       case OP_LOADNIL: {
+         int b = GETARG_B(i);
+         if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
+-          setreg = pc;
++          setreg = filterpc(pc, jmptarget);
+         break;
+       }
+       case OP_TFORCALL: {
+-        if (reg >= a + 2) setreg = pc;  /* affect all regs above its base */
++        if (reg >= a + 2)  /* affect all regs above its base */
++          setreg = filterpc(pc, jmptarget);
+         break;
+       }
+       case OP_CALL:
+       case OP_TAILCALL: {
+-        if (reg >= a) setreg = pc;  /* affect all registers above base */
++        if (reg >= a)  /* affect all registers above base */
++          setreg = filterpc(pc, jmptarget);
+         break;
+       }
+       case OP_JMP: {
+         int b = GETARG_sBx(i);
+         int dest = pc + 1 + b;
+         /* jump is forward and do not skip `lastpc'? */
+-        if (pc < dest && dest <= lastpc)
+-          pc += b;  /* do the jump */
++        if (pc < dest && dest <= lastpc) {
++          if (dest > jmptarget)
++            jmptarget = dest;  /* update 'jmptarget' */
++        }
+         break;
+       }
+       case OP_TEST: {
+-        if (reg == a) setreg = pc;  /* jumped code can change 'a' */
++        if (reg == a)  /* jumped code can change 'a' */
++          setreg = filterpc(pc, jmptarget);
+         break;
+       }
+       default:
+         if (testAMode(op) && reg == a)  /* any instruction that set A */
+-          setreg = pc;
++          setreg = filterpc(pc, jmptarget);
+         break;
+     }
+   }
+]]
+}
+
+Bug{
+what = [[luac listings choke on long strings]],
+report = [[Ashwin Hirschi, 2013/07/03]],
+since = [[5.1.2]],
+fix = [[5.2.3]],
+example = [[
+-- When you call 'luac -l' over this chunk, it chokes the output
+s="Lorem ipsum dolor sit amet, consectetur, "
+]],
+patch = [[
+--- luac.c 2011-11-29 15:46:33 -0200  1.69
++++ luac.c 2013-07-03 21:26:01 -0300
+@@ -251,7 +251,7 @@
+ static void PrintConstant(const Proto* f, int i)
+ {
+  const TValue* o=&f->k[i];
+- switch (ttype(o))
++ switch (ttypenv(o))
+  {
+   case LUA_TNIL:
+        printf("nil");
+]]
+}
+
+Bug{
+what = [[GC can collect a long string still in use during parser]],
+report = [[Roberto, 2013/08/30]],
+since = [[5.2]],
+fix = [[5.2.3]],
+example = [[This bug is very difficult to happen (and to reproduce),
+because it depends on the GC running in a very specific way when
+parsing a source code with long (larger than 40 characters) identifiers.]],
+patch = [[
+--- ltable.h	2013/04/12 18:48:47	2.16.1.1
++++ ltable.h	2013/08/30 15:34:24
+@@ -18,4 +18,8 @@
+ #define invalidateTMcache(t)	((t)->flags = 0)
+ 
++/* returns the key, given the value of a table entry */
++#define keyfromval(v) \
++  (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
++
+ 
+ LUAI_FUNC const TValue *luaH_getint (Table *t, int key);
+
+--- llex.c	2013/04/12 18:48:47	2.63.1.1
++++ llex.c	2013/08/30 15:34:59
+@@ -134,4 +134,7 @@
+     luaC_checkGC(L);
+   }
++  else {  /* string already present */
++    ts = rawtsvalue(keyfromval(o));  /* re-use value previously stored */
++  }
+   L->top--;  /* remove string from stack */
+   return ts;
+]]
+}
+
+
+Bug{
+what = [[Call to macro 'luai_userstateclose' should be done only
+after the calls to __gc methods.]],
+report = [[Jean-Luc Jumpertz, 2013/09/02]],
+since = [[ ]],
+fix = nil,
+example = [[No example]],
+patch = [[
+--- lstate.c	2013/04/12 18:48:47	2.99.1.1
++++ lstate.c	2013/11/08 17:39:57
+@@ -194,2 +194,4 @@
+   g->gcrunning = 1;  /* allow gc */
++  g->version = lua_version(NULL);
++  luai_userstateopen(L);
+ }
+@@ -224,2 +226,4 @@
+   luaC_freeallobjects(L);  /* collect all objects */
++  if (g->version)  /* closing a fully built state? */
++    luai_userstateclose(L);
+   luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
+@@ -289,3 +293,3 @@
+   g->panic = NULL;
+-  g->version = lua_version(NULL);
++  g->version = NULL;
+   g->gcstate = GCSpause;
+@@ -308,4 +312,2 @@
+   }
+-  else
+-    luai_userstateopen(L);
+   return L;
+@@ -317,3 +319,2 @@
+   lua_lock(L);
+-  luai_userstateclose(L);
+   close_state(L);
+]]
+}
+
+
+Bug{
+what = [[Resuming the running coroutine makes it unyieldable]],
+report = [[Florian Nücke, 2013/10/28]],
+since = [[5.2]],
+fix = [[5.2.3]],
+example = [[
+-- should print 'true'
+print(coroutine.resume(coroutine.create(function()
+  coroutine.resume(coroutine.running())
+  coroutine.yield()
+end)))
+]],
+patch = [[
+--- ldo.c	2013/04/19 21:03:23	2.108.1.2
++++ ldo.c	2013/11/08 18:20:57
+@@ -536,2 +536,3 @@
+   int status;
++  int oldnny = L->nny;  /* save 'nny' */
+   lua_lock(L);
+@@ -557,3 +558,3 @@
+   }
+-  L->nny = 1;  /* do not allow yields */
++  L->nny = oldnny;  /* restore 'nny' */
+   L->nCcalls--;
+]]
+}
+
+
+
+-----------------------------------------------------------------
+-- Lua 5.2.3
+
+Bug{
+what = [[compiler can optimize away overflow check in 'table.unpack']],
+report = [[Paige DePol, 2014/03/30]],
+since = [[5.1 (at least)]],
+fix = nil,
+example = [[
+> unpack({}, 0, 2^31 - 1)
+(segfaults on some platforms with some compiler options)
+]],
+patch = [[
+]]
+}
+
+Bug{
+what = [[Ephemeron table can wrongly collect entry with strong key]],
+report = [[Jörg Richter, 2014/08/22]],
+since = [[5.2]],
+fix = nil,
+example = [[
+(This bug is very hard to reproduce,
+because it depends on a specific interleaving of
+events between the incremental collector and the program.)
+]],
+patch = [[
+--- lgc.c	2013/04/26 18:22:05	2.140.1.2
++++ lgc.c	2014/09/01 13:24:33
+@@ -403,7 +403,7 @@
+       reallymarkobject(g, gcvalue(gval(n)));  /* mark it now */
+     }
+   }
+-  if (prop)
++  if (g->gcstate != GCSatomic || 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 */
+]]
+}
+
+
 --[=[
 Bug{
 what = [[ ]],

lapi.c

@@ -1,10 +1,11 @@
 /*
-** $Id: lapi.c,v 2.170 2012/12/05 19:49:55 roberto Exp roberto $
+** $Id: lapi.c,v 2.237 2014/10/15 14:27:40 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
 
 
+#include <math.h>
 #include <stdarg.h>
 #include <string.h>
 
@@ -43,32 +44,35 @@ const char lua_ident[] =
 /* test for pseudo index */
 #define ispseudo(i)		((i) <= LUA_REGISTRYINDEX)
 
+/* test for upvalue */
+#define isupvalue(i)		((i) < LUA_REGISTRYINDEX)
+
 /* test for valid but not pseudo index */
 #define isstackindex(i, o)	(isvalid(o) && !ispseudo(i))
 
-#define api_checkvalidindex(L, o)  api_check(L, isvalid(o), "invalid index")
+#define api_checkvalidindex(o)  api_check(isvalid(o), "invalid index")
 
-#define api_checkstackindex(L, i, o)  \
+#define api_checkstackindex(i, o)  \
-	api_check(L, isstackindex(i, o), "index not in the stack")
+	api_check(isstackindex(i, o), "index not in the stack")
 
 
 static TValue *index2addr (lua_State *L, int idx) {
   CallInfo *ci = L->ci;
   if (idx > 0) {
     TValue *o = ci->func + idx;
-    api_check(L, idx <= ci->top - (ci->func + 1), "unacceptable index");
+    api_check(idx <= ci->top - (ci->func + 1), "unacceptable index");
     if (o >= L->top) return NONVALIDVALUE;
     else return o;
   }
   else if (!ispseudo(idx)) {  /* negative index */
-    api_check(L, idx != 0 && -idx <= L->top - (ci->func + 1), "invalid index");
+    api_check(idx != 0 && -idx <= L->top - (ci->func + 1), "invalid index");
     return L->top + idx;
   }
   else if (idx == LUA_REGISTRYINDEX)
     return &G(L)->l_registry;
   else {  /* upvalues */
     idx = LUA_REGISTRYINDEX - idx;
-    api_check(L, idx <= MAXUPVAL + 1, "upvalue index too large");
+    api_check(idx <= MAXUPVAL + 1, "upvalue index too large");
     if (ttislcf(ci->func))  /* light C function? */
       return NONVALIDVALUE;  /* it has no upvalues */
     else {
@@ -93,6 +97,7 @@ LUA_API int lua_checkstack (lua_State *L, int size) {
   int res;
   CallInfo *ci = L->ci;
   lua_lock(L);
+  api_check(size >= 0, "negative 'size'");
   if (L->stack_last - L->top > size)  /* stack large enough? */
     res = 1;  /* yes; check is OK */
   else {  /* no; need to grow stack */
@@ -114,8 +119,8 @@ LUA_API void lua_xmove (lua_State *from, lua_State *to, int n) {
   if (from == to) return;
   lua_lock(to);
   api_checknelems(from, n);
-  api_check(from, G(from) == G(to), "moving among independent states");
+  api_check(G(from) == G(to), "moving among independent states");
-  api_check(from, to->ci->top - to->top >= n, "not enough elements to move");
+  api_check(to->ci->top - to->top >= n, "not enough elements to move");
   from->top -= n;
   for (i = 0; i < n; i++) {
     setobj2s(to, to->top++, from->top + i);
@@ -166,68 +171,63 @@ LUA_API void lua_settop (lua_State *L, int idx) {
   StkId func = L->ci->func;
   lua_lock(L);
   if (idx >= 0) {
-    api_check(L, idx <= L->stack_last - (func + 1), "new top too large");
+    api_check(idx <= L->stack_last - (func + 1), "new top too large");
     while (L->top < (func + 1) + idx)
       setnilvalue(L->top++);
     L->top = (func + 1) + idx;
   }
   else {
-    api_check(L, -(idx+1) <= (L->top - (func + 1)), "invalid new top");
+    api_check(-(idx+1) <= (L->top - (func + 1)), "invalid new top");
     L->top += idx+1;  /* `subtract' index (index is negative) */
   }
   lua_unlock(L);
 }
 
 
-LUA_API void lua_remove (lua_State *L, int idx) {
+/*
-  StkId p;
+** Reverse the stack segment from 'from' to 'to'
-  lua_lock(L);
+** (auxiliary to 'lua_rotate')
-  p = index2addr(L, idx);
+*/
-  api_checkstackindex(L, idx, p);
+static void reverse (lua_State *L, StkId from, StkId to) {
-  while (++p < L->top) setobjs2s(L, p-1, p);
+  for (; from < to; from++, to--) {
-  L->top--;
+    TValue temp;
-  lua_unlock(L);
+    setobj(L, &temp, from);
+    setobjs2s(L, from, to);
+    setobj2s(L, to, &temp);
+  }
 }
 
 
-LUA_API void lua_insert (lua_State *L, int idx) {
+/*
-  StkId p;
+** Let x = AB, where A is a prefix of length 'n'. Then,
-  StkId q;
+** rotate x n == BA. But BA == (A^r . B^r)^r.
+*/
+LUA_API void lua_rotate (lua_State *L, int idx, int n) {
+  StkId p, t, m;
   lua_lock(L);
-  p = index2addr(L, idx);
+  t = L->top - 1;  /* end of stack segment being rotated */
-  api_checkstackindex(L, idx, p);
+  p = index2addr(L, idx);  /* start of segment */
-  for (q = L->top; q > p; q--)  /* use L->top as a temporary */
+  api_checkstackindex(idx, p);
-    setobjs2s(L, q, q - 1);
+  api_check((n >= 0 ? n : -n) <= (t - p + 1), "invalid 'n'");
-  setobjs2s(L, p, L->top);
+  m = (n >= 0 ? t - n : p - n - 1);  /* end of prefix */
-  lua_unlock(L);
+  reverse(L, p, m);  /* reverse the prefix with length 'n' */
-}
+  reverse(L, m + 1, t);  /* reverse the suffix */
-
+  reverse(L, p, t);  /* reverse the entire segment */
-
-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? */
-    luaC_barrier(L, clCvalue(L->ci->func), fr);
-  /* LUA_REGISTRYINDEX does not need gc barrier
-     (collector revisits it before finishing collection) */
-}
-
-
-LUA_API void lua_replace (lua_State *L, int idx) {
-  lua_lock(L);
-  api_checknelems(L, 1);
-  moveto(L, L->top - 1, idx);
-  L->top--;
   lua_unlock(L);
 }
 
 
 LUA_API void lua_copy (lua_State *L, int fromidx, int toidx) {
-  TValue *fr;
+  TValue *fr, *to;
   lua_lock(L);
   fr = index2addr(L, fromidx);
-  moveto(L, fr, toidx);
+  to = index2addr(L, toidx);
+  api_checkvalidindex(to);
+  setobj(L, to, fr);
+  if (isupvalue(toidx))  /* function upvalue? */
+    luaC_barrier(L, clCvalue(L->ci->func), fr);
+  /* LUA_REGISTRYINDEX does not need gc barrier
+     (collector revisits it before finishing collection) */
   lua_unlock(L);
 }
 
@@ -248,12 +248,13 @@ 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 (isvalid(o) ? ttypenv(o) : LUA_TNONE);
+  return (isvalid(o) ? ttnov(o) : LUA_TNONE);
 }
 
 
 LUA_API const char *lua_typename (lua_State *L, int t) {
   UNUSED(L);
+  api_check(LUA_TNONE <= t && t < LUA_NUMTAGS, "invalid tag");
   return ttypename(t);
 }
 
@@ -264,22 +265,28 @@ LUA_API int lua_iscfunction (lua_State *L, int idx) {
 }
 
 
+LUA_API int lua_isinteger (lua_State *L, int idx) {
+  StkId o = index2addr(L, idx);
+  return ttisinteger(o);
+}
+
+
 LUA_API int lua_isnumber (lua_State *L, int idx) {
-  TValue n;
+  lua_Number n;
   const TValue *o = index2addr(L, idx);
   return tonumber(o, &n);
 }
 
 
 LUA_API int lua_isstring (lua_State *L, int idx) {
-  int t = lua_type(L, idx);
+  const TValue *o = index2addr(L, idx);
-  return (t == LUA_TSTRING || t == LUA_TNUMBER);
+  return (ttisstring(o) || cvt2str(o));
 }
 
 
 LUA_API int lua_isuserdata (lua_State *L, int idx) {
   const TValue *o = index2addr(L, idx);
-  return (ttisuserdata(o) || ttislightuserdata(o));
+  return (ttisfulluserdata(o) || ttislightuserdata(o));
 }
 
 
@@ -291,24 +298,17 @@ LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
 
 
 LUA_API void lua_arith (lua_State *L, int op) {
-  StkId o1;  /* 1st operand */
-  StkId o2;  /* 2nd operand */
   lua_lock(L);
-  if (op != LUA_OPUNM) /* all other operations expect two operands */
+  if (op != LUA_OPUNM && op != LUA_OPBNOT)
-    api_checknelems(L, 2);
+    api_checknelems(L, 2);  /* all other operations expect two operands */
-  else {  /* for unary minus, add fake 2nd operand */
+  else {  /* for unary operations, add fake 2nd operand */
     api_checknelems(L, 1);
     setobjs2s(L, L->top, L->top - 1);
     L->top++;
   }
-  o1 = L->top - 2;
+  /* first operand at top - 2, second at top - 1; result go to top - 2 */
-  o2 = L->top - 1;
+  luaO_arith(L, op, L->top - 2, L->top - 1, L->top - 2);
-  if (ttisnumber(o1) && ttisnumber(o2)) {
+  L->top--;  /* remove second operand */
-    setnvalue(o1, luaO_arith(op, nvalue(o1), nvalue(o2)));
-  }
-  else
-    luaV_arith(L, o1, o1, o2, cast(TMS, op - LUA_OPADD + TM_ADD));
-  L->top--;
   lua_unlock(L);
 }
 
@@ -321,10 +321,10 @@ LUA_API int lua_compare (lua_State *L, int index1, int index2, int op) {
   o2 = index2addr(L, index2);
   if (isvalid(o1) && isvalid(o2)) {
     switch (op) {
-      case LUA_OPEQ: i = equalobj(L, o1, o2); break;
+      case LUA_OPEQ: i = luaV_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");
+      default: api_check(0, "invalid option");
     }
   }
   lua_unlock(L);
@@ -332,51 +332,33 @@ LUA_API int lua_compare (lua_State *L, int index1, int index2, int op) {
 }
 
 
-LUA_API lua_Number lua_tonumberx (lua_State *L, int idx, int *isnum) {
+LUA_API size_t lua_stringtonumber (lua_State *L, const char *s) {
-  TValue n;
+  size_t sz = luaO_str2num(s, L->top);
-  const TValue *o = index2addr(L, idx);
+  if (sz != 0)
-  if (tonumber(o, &n)) {
+    api_incr_top(L);
-    if (isnum) *isnum = 1;
+  return sz;
-    return nvalue(o);
-  }
-  else {
-    if (isnum) *isnum = 0;
-    return 0;
-  }
 }
 
 
-LUA_API lua_Integer lua_tointegerx (lua_State *L, int idx, int *isnum) {
+LUA_API lua_Number lua_tonumberx (lua_State *L, int idx, int *pisnum) {
-  TValue n;
+  lua_Number n;
   const TValue *o = index2addr(L, idx);
-  if (tonumber(o, &n)) {
+  int isnum = tonumber(o, &n);
-    lua_Integer res;
+  if (!isnum)
-    lua_Number num = nvalue(o);
+    n = 0;  /* call to 'tonumber' may change 'n' even if it fails */
-    lua_number2integer(res, num);
+  if (pisnum) *pisnum = isnum;
-    if (isnum) *isnum = 1;
+  return n;
-    return res;
-  }
-  else {
-    if (isnum) *isnum = 0;
-    return 0;
-  }
 }
 
 
-LUA_API lua_Unsigned lua_tounsignedx (lua_State *L, int idx, int *isnum) {
+LUA_API lua_Integer lua_tointegerx (lua_State *L, int idx, int *pisnum) {
-  TValue n;
+  lua_Integer res;
   const TValue *o = index2addr(L, idx);
-  if (tonumber(o, &n)) {
+  int isnum = tointeger(o, &res);
-    lua_Unsigned res;
+  if (!isnum)
-    lua_Number num = nvalue(o);
+    res = 0;  /* call to 'tointeger' may change 'n' even if it fails */
-    lua_number2unsigned(res, num);
+  if (pisnum) *pisnum = isnum;
-    if (isnum) *isnum = 1;
+  return res;
-    return res;
-  }
-  else {
-    if (isnum) *isnum = 0;
-    return 0;
-  }
 }
 
 
@@ -389,14 +371,14 @@ LUA_API int lua_toboolean (lua_State *L, int idx) {
 LUA_API const char *lua_tolstring (lua_State *L, int idx, size_t *len) {
   StkId o = index2addr(L, idx);
   if (!ttisstring(o)) {
-    lua_lock(L);  /* `luaV_tostring' may create a new string */
+    if (!cvt2str(o)) {  /* not convertible? */
-    if (!luaV_tostring(L, o)) {  /* conversion failed? */
       if (len != NULL) *len = 0;
-      lua_unlock(L);
       return NULL;
     }
+    lua_lock(L);  /* `luaO_tostring' may create a new string */
     luaC_checkGC(L);
     o = index2addr(L, idx);  /* previous call may reallocate the stack */
+    luaO_tostring(L, o);
     lua_unlock(L);
   }
   if (len != NULL) *len = tsvalue(o)->len;
@@ -406,7 +388,7 @@ 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 (ttypenv(o)) {
+  switch (ttnov(o)) {
     case LUA_TSTRING: return tsvalue(o)->len;
     case LUA_TUSERDATA: return uvalue(o)->len;
     case LUA_TTABLE: return luaH_getn(hvalue(o));
@@ -426,8 +408,8 @@ LUA_API lua_CFunction lua_tocfunction (lua_State *L, int idx) {
 
 LUA_API void *lua_touserdata (lua_State *L, int idx) {
   StkId o = index2addr(L, idx);
-  switch (ttypenv(o)) {
+  switch (ttnov(o)) {
-    case LUA_TUSERDATA: return (rawuvalue(o) + 1);
+    case LUA_TUSERDATA: return getudatamem(uvalue(o));
     case LUA_TLIGHTUSERDATA: return pvalue(o);
     default: return NULL;
   }
@@ -472,9 +454,7 @@ 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);
+  setfltvalue(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);
 }
@@ -482,17 +462,7 @@ LUA_API void lua_pushnumber (lua_State *L, lua_Number n) {
 
 LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
   lua_lock(L);
-  setnvalue(L->top, cast_num(n));
+  setivalue(L->top, n);
-  api_incr_top(L);
-  lua_unlock(L);
-}
-
-
-LUA_API void lua_pushunsigned (lua_State *L, lua_Unsigned u) {
-  lua_Number n;
-  lua_lock(L);
-  n = lua_unsigned2number(u);
-  setnvalue(L->top, n);
   api_incr_top(L);
   lua_unlock(L);
 }
@@ -558,15 +528,17 @@ LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
     setfvalue(L->top, fn);
   }
   else {
-    Closure *cl;
+    CClosure *cl;
     api_checknelems(L, n);
-    api_check(L, n <= MAXUPVAL, "upvalue index too large");
+    api_check(n <= MAXUPVAL, "upvalue index too large");
     luaC_checkGC(L);
     cl = luaF_newCclosure(L, n);
-    cl->c.f = fn;
+    cl->f = fn;
     L->top -= n;
-    while (n--)
+    while (n--) {
-      setobj2n(L, &cl->c.upvalue[n], L->top + n);
+      setobj2n(L, &cl->upvalue[n], L->top + n);
+      /* does not need barrier because closure is white */
+    }
     setclCvalue(L, L->top, cl);
   }
   api_incr_top(L);
@@ -605,7 +577,7 @@ LUA_API int lua_pushthread (lua_State *L) {
 */
 
 
-LUA_API void lua_getglobal (lua_State *L, const char *var) {
+LUA_API int lua_getglobal (lua_State *L, const char *var) {
   Table *reg = hvalue(&G(L)->l_registry);
   const TValue *gt;  /* global table */
   lua_lock(L);
@@ -613,19 +585,21 @@ LUA_API void lua_getglobal (lua_State *L, const char *var) {
   setsvalue2s(L, L->top++, luaS_new(L, var));
   luaV_gettable(L, gt, L->top - 1, L->top - 1);
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
-LUA_API void lua_gettable (lua_State *L, int idx) {
+LUA_API int lua_gettable (lua_State *L, int idx) {
   StkId t;
   lua_lock(L);
   t = index2addr(L, idx);
   luaV_gettable(L, t, L->top - 1, L->top - 1);
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
-LUA_API void lua_getfield (lua_State *L, int idx, const char *k) {
+LUA_API int lua_getfield (lua_State *L, int idx, const char *k) {
   StkId t;
   lua_lock(L);
   t = index2addr(L, idx);
@@ -633,40 +607,56 @@ LUA_API void lua_getfield (lua_State *L, int idx, const char *k) {
   api_incr_top(L);
   luaV_gettable(L, t, L->top - 1, L->top - 1);
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
-LUA_API void lua_rawget (lua_State *L, int idx) {
+LUA_API int lua_geti (lua_State *L, int idx, lua_Integer n) {
   StkId t;
   lua_lock(L);
   t = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  setivalue(L->top, n);
+  api_incr_top(L);
+  luaV_gettable(L, t, L->top - 1, L->top - 1);
+  lua_unlock(L);
+  return ttnov(L->top - 1);
+}
+
+
+LUA_API int lua_rawget (lua_State *L, int idx) {
+  StkId t;
+  lua_lock(L);
+  t = index2addr(L, idx);
+  api_check(ttistable(t), "table expected");
   setobj2s(L, L->top - 1, luaH_get(hvalue(t), L->top - 1));
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
-LUA_API void lua_rawgeti (lua_State *L, int idx, int n) {
+LUA_API int lua_rawgeti (lua_State *L, int idx, lua_Integer n) {
   StkId t;
   lua_lock(L);
   t = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  api_check(ttistable(t), "table expected");
   setobj2s(L, L->top, luaH_getint(hvalue(t), n));
   api_incr_top(L);
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
-LUA_API void lua_rawgetp (lua_State *L, int idx, const void *p) {
+LUA_API int 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");
+  api_check(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);
+  return ttnov(L->top - 1);
 }
 
 
@@ -686,10 +676,10 @@ LUA_API void lua_createtable (lua_State *L, int narray, int nrec) {
 LUA_API int lua_getmetatable (lua_State *L, int objindex) {
   const TValue *obj;
   Table *mt = NULL;
-  int res;
+  int res = 0;
   lua_lock(L);
   obj = index2addr(L, objindex);
-  switch (ttypenv(obj)) {
+  switch (ttnov(obj)) {
     case LUA_TTABLE:
       mt = hvalue(obj)->metatable;
       break;
@@ -697,12 +687,10 @@ LUA_API int lua_getmetatable (lua_State *L, int objindex) {
       mt = uvalue(obj)->metatable;
       break;
     default:
-      mt = G(L)->mt[ttypenv(obj)];
+      mt = G(L)->mt[ttnov(obj)];
       break;
   }
-  if (mt == NULL)
+  if (mt != NULL) {
-    res = 0;
-  else {
     sethvalue(L, L->top, mt);
     api_incr_top(L);
     res = 1;
@@ -712,17 +700,15 @@ LUA_API int lua_getmetatable (lua_State *L, int objindex) {
 }
 
 
-LUA_API void lua_getuservalue (lua_State *L, int idx) {
+LUA_API int lua_getuservalue (lua_State *L, int idx) {
   StkId o;
   lua_lock(L);
   o = index2addr(L, idx);
-  api_check(L, ttisuserdata(o), "userdata expected");
+  api_check(ttisfulluserdata(o), "full userdata expected");
-  if (uvalue(o)->env) {
+  getuservalue(L, uvalue(o), L->top);
-    sethvalue(L, L->top, uvalue(o)->env);
-  } else
-    setnilvalue(L->top);
   api_incr_top(L);
   lua_unlock(L);
+  return ttnov(L->top - 1);
 }
 
 
@@ -767,43 +753,61 @@ 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_seti (lua_State *L, int idx, lua_Integer n) {
   StkId t;
   lua_lock(L);
-  api_checknelems(L, 2);
+  api_checknelems(L, 1);
   t = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  setivalue(L->top++, n);
-  setobj2t(L, luaH_set(L, hvalue(t), L->top-2), L->top-1);
+  luaV_settable(L, t, L->top - 1, L->top - 2);
-  invalidateTMcache(hvalue(t));
+  L->top -= 2;  /* pop value and key */
-  luaC_barrierback(L, gcvalue(t), L->top-1);
+  lua_unlock(L);
+}
+
+
+LUA_API void lua_rawset (lua_State *L, int idx) {
+  StkId o;
+  Table *t;
+  lua_lock(L);
+  api_checknelems(L, 2);
+  o = index2addr(L, idx);
+  api_check(ttistable(o), "table expected");
+  t = hvalue(o);
+  setobj2t(L, luaH_set(L, t, L->top-2), L->top-1);
+  invalidateTMcache(t);
+  luaC_barrierback(L, t, L->top-1);
   L->top -= 2;
   lua_unlock(L);
 }
 
 
-LUA_API void lua_rawseti (lua_State *L, int idx, int n) {
+LUA_API void lua_rawseti (lua_State *L, int idx, lua_Integer n) {
-  StkId t;
+  StkId o;
+  Table *t;
   lua_lock(L);
   api_checknelems(L, 1);
-  t = index2addr(L, idx);
+  o = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  api_check(ttistable(o), "table expected");
-  luaH_setint(L, hvalue(t), n, L->top - 1);
+  t = hvalue(o);
-  luaC_barrierback(L, gcvalue(t), L->top-1);
+  luaH_setint(L, t, n, L->top - 1);
+  luaC_barrierback(L, t, L->top-1);
   L->top--;
   lua_unlock(L);
 }
 
 
 LUA_API void lua_rawsetp (lua_State *L, int idx, const void *p) {
-  StkId t;
+  StkId o;
+  Table *t;
   TValue k;
   lua_lock(L);
   api_checknelems(L, 1);
-  t = index2addr(L, idx);
+  o = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  api_check(ttistable(o), "table expected");
+  t = hvalue(o);
   setpvalue(&k, cast(void *, p));
-  setobj2t(L, luaH_set(L, hvalue(t), &k), L->top - 1);
+  setobj2t(L, luaH_set(L, t, &k), L->top - 1);
-  luaC_barrierback(L, gcvalue(t), L->top - 1);
+  luaC_barrierback(L, t, L->top - 1);
   L->top--;
   lua_unlock(L);
 }
@@ -818,14 +822,14 @@ LUA_API int lua_setmetatable (lua_State *L, int objindex) {
   if (ttisnil(L->top - 1))
     mt = NULL;
   else {
-    api_check(L, ttistable(L->top - 1), "table expected");
+    api_check(ttistable(L->top - 1), "table expected");
     mt = hvalue(L->top - 1);
   }
-  switch (ttypenv(obj)) {
+  switch (ttnov(obj)) {
     case LUA_TTABLE: {
       hvalue(obj)->metatable = mt;
       if (mt) {
-        luaC_objbarrierback(L, gcvalue(obj), mt);
+        luaC_objbarrier(L, gcvalue(obj), mt);
         luaC_checkfinalizer(L, gcvalue(obj), mt);
       }
       break;
@@ -833,13 +837,13 @@ LUA_API int lua_setmetatable (lua_State *L, int objindex) {
     case LUA_TUSERDATA: {
       uvalue(obj)->metatable = mt;
       if (mt) {
-        luaC_objbarrier(L, rawuvalue(obj), mt);
+        luaC_objbarrier(L, uvalue(obj), mt);
         luaC_checkfinalizer(L, gcvalue(obj), mt);
       }
       break;
     }
     default: {
-      G(L)->mt[ttypenv(obj)] = mt;
+      G(L)->mt[ttnov(obj)] = mt;
       break;
     }
   }
@@ -854,14 +858,9 @@ LUA_API void lua_setuservalue (lua_State *L, int idx) {
   lua_lock(L);
   api_checknelems(L, 1);
   o = index2addr(L, idx);
-  api_check(L, ttisuserdata(o), "userdata expected");
+  api_check(ttisfulluserdata(o), "full userdata expected");
-  if (ttisnil(L->top - 1))
+  setuservalue(L, uvalue(o), L->top - 1);
-    uvalue(o)->env = NULL;
+  luaC_barrier(L, gcvalue(o), L->top - 1);
-  else {
-    api_check(L, ttistable(L->top - 1), "table expected");
-    uvalue(o)->env = hvalue(L->top - 1);
-    luaC_objbarrier(L, gcvalue(o), hvalue(L->top - 1));
-  }
   L->top--;
   lua_unlock(L);
 }
@@ -873,27 +872,18 @@ LUA_API void lua_setuservalue (lua_State *L, int idx) {
 
 
 #define checkresults(L,na,nr) \
-     api_check(L, (nr) == LUA_MULTRET || (L->ci->top - L->top >= (nr) - (na)), \
+     api_check((nr) == LUA_MULTRET || (L->ci->top - L->top >= (nr) - (na)), \
 	"results from function overflow current stack size")
 
 
-LUA_API int lua_getctx (lua_State *L, int *ctx) {
+LUA_API void lua_callk (lua_State *L, int nargs, int nresults,
-  if (L->ci->callstatus & CIST_YIELDED) {
+                        lua_KContext ctx, lua_KFunction k) {
-    if (ctx) *ctx = L->ci->u.c.ctx;
-    return L->ci->u.c.status;
-  }
-  else return LUA_OK;
-}
-
-
-LUA_API void lua_callk (lua_State *L, int nargs, int nresults, int ctx,
-                        lua_CFunction k) {
   StkId func;
   lua_lock(L);
-  api_check(L, k == NULL || !isLua(L->ci),
+  api_check(k == NULL || !isLua(L->ci),
     "cannot use continuations inside hooks");
   api_checknelems(L, nargs+1);
-  api_check(L, L->status == LUA_OK, "cannot do calls on non-normal thread");
+  api_check(L->status == LUA_OK, "cannot do calls on non-normal thread");
   checkresults(L, nargs, nresults);
   func = L->top - (nargs+1);
   if (k != NULL && L->nny == 0) {  /* need to prepare continuation? */
@@ -926,21 +916,21 @@ static void f_call (lua_State *L, void *ud) {
 
 
 LUA_API int lua_pcallk (lua_State *L, int nargs, int nresults, int errfunc,
-                        int ctx, lua_CFunction k) {
+                        lua_KContext ctx, lua_KFunction k) {
   struct CallS c;
   int status;
   ptrdiff_t func;
   lua_lock(L);
-  api_check(L, k == NULL || !isLua(L->ci),
+  api_check(k == NULL || !isLua(L->ci),
     "cannot use continuations inside hooks");
   api_checknelems(L, nargs+1);
-  api_check(L, L->status == LUA_OK, "cannot do calls on non-normal thread");
+  api_check(L->status == LUA_OK, "cannot do calls on non-normal thread");
   checkresults(L, nargs, nresults);
   if (errfunc == 0)
     func = 0;
   else {
     StkId o = index2addr(L, errfunc);
-    api_checkstackindex(L, errfunc, o);
+    api_checkstackindex(errfunc, o);
     func = savestack(L, o);
   }
   c.func = L->top - (nargs+1);  /* function to be called */
@@ -954,11 +944,10 @@ LUA_API int lua_pcallk (lua_State *L, int nargs, int nresults, int errfunc,
     ci->u.c.ctx = ctx;  /* save context */
     /* save information for error recovery */
     ci->extra = savestack(L, c.func);
-    ci->u.c.old_allowhook = L->allowhook;
     ci->u.c.old_errfunc = L->errfunc;
     L->errfunc = func;
-    /* mark that function may do error recovery */
+    setoah(ci->callstatus, L->allowhook);  /* save value of 'allowhook' */
-    ci->callstatus |= CIST_YPCALL;
+    ci->callstatus |= CIST_YPCALL;  /* function can do error recovery */
     luaD_call(L, c.func, nresults, 1);  /* do the call */
     ci->callstatus &= ~CIST_YPCALL;
     L->errfunc = ci->u.c.old_errfunc;
@@ -986,7 +975,7 @@ LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data,
       const TValue *gt = luaH_getint(reg, LUA_RIDX_GLOBALS);
       /* set global table as 1st upvalue of 'f' (may be LUA_ENV) */
       setobj(L, f->upvals[0]->v, gt);
-      luaC_barrier(L, f->upvals[0], gt);
+      luaC_upvalbarrier(L, f->upvals[0]);
     }
   }
   lua_unlock(L);
@@ -994,14 +983,14 @@ LUA_API int lua_load (lua_State *L, lua_Reader reader, void *data,
 }
 
 
-LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data) {
+LUA_API int lua_dump (lua_State *L, lua_Writer writer, void *data, int strip) {
   int status;
   TValue *o;
   lua_lock(L);
   api_checknelems(L, 1);
   o = L->top - 1;
   if (isLfunction(o))
-    status = luaU_dump(L, getproto(o), writer, data, 0);
+    status = luaU_dump(L, getproto(o), writer, data, strip);
   else
     status = 1;
   lua_unlock(L);
@@ -1047,19 +1036,21 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
       break;
     }
     case LUA_GCSTEP: {
-      if (g->gckind == KGC_GEN) {  /* generational mode? */
+      l_mem debt = 1;  /* =1 to signal that it did an actual step */
-        res = (g->GCestimate == 0);  /* true if it will do major collection */
+      int oldrunning = g->gcrunning;
-        luaC_forcestep(L);  /* do a single step */
+      g->gcrunning = 1;  /* allow GC to run */
+      if (data == 0) {
+        luaE_setdebt(g, -GCSTEPSIZE);  /* to do a "small" step */
+        luaC_step(L);
       }
-      else {
+      else {  /* add 'data' to total debt */
-       lu_mem debt = cast(lu_mem, data) * 1024 - GCSTEPSIZE;
+        debt = cast(l_mem, data) * 1024 + g->GCdebt;
-       if (g->gcrunning)
+        luaE_setdebt(g, debt);
-         debt += g->GCdebt;  /* include current debt */
+        luaC_checkGC(L);
-       luaE_setdebt(g, debt);
-       luaC_forcestep(L);
-       if (g->gcstate == GCSpause)  /* end of cycle? */
-         res = 1;  /* signal it */
       }
+      g->gcrunning = oldrunning;  /* restore previous state */
+      if (debt > 0 && g->gcstate == GCSpause)  /* end of cycle? */
+        res = 1;  /* signal it */
       break;
     }
     case LUA_GCSETPAUSE: {
@@ -1067,13 +1058,9 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
       g->gcpause = data;
       break;
     }
-    case LUA_GCSETMAJORINC: {
-      res = g->gcmajorinc;
-      g->gcmajorinc = data;
-      break;
-    }
     case LUA_GCSETSTEPMUL: {
       res = g->gcstepmul;
+      if (data < 40) data = 40;  /* avoid ridiculous low values (and 0) */
       g->gcstepmul = data;
       break;
     }
@@ -1081,14 +1068,6 @@ LUA_API int lua_gc (lua_State *L, int what, int data) {
       res = g->gcrunning;
       break;
     }
-    case LUA_GCGEN: {  /* change collector to generational mode */
-      luaC_changemode(L, KGC_GEN);
-      break;
-    }
-    case LUA_GCINC: {  /* change collector to incremental mode */
-      luaC_changemode(L, KGC_NORMAL);
-      break;
-    }
     default: res = -1;  /* invalid option */
   }
   lua_unlock(L);
@@ -1116,7 +1095,7 @@ LUA_API int lua_next (lua_State *L, int idx) {
   int more;
   lua_lock(L);
   t = index2addr(L, idx);
-  api_check(L, ttistable(t), "table expected");
+  api_check(ttistable(t), "table expected");
   more = luaH_next(L, hvalue(t), L->top - 1);
   if (more) {
     api_incr_top(L);
@@ -1176,23 +1155,23 @@ LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
   Udata *u;
   lua_lock(L);
   luaC_checkGC(L);
-  u = luaS_newudata(L, size, NULL);
+  u = luaS_newudata(L, size);
   setuvalue(L, L->top, u);
   api_incr_top(L);
   lua_unlock(L);
-  return u + 1;
+  return getudatamem(u);
 }
 
 
 
 static const char *aux_upvalue (StkId fi, int n, TValue **val,
-                                GCObject **owner) {
+                                CClosure **owner, UpVal **uv) {
   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);
+      if (owner) *owner = f;
       return "";
     }
     case LUA_TLCL: {  /* Lua closure */
@@ -1201,9 +1180,9 @@ static const char *aux_upvalue (StkId fi, int n, TValue **val,
       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]);
+      if (uv) *uv = f->upvals[n - 1];
       name = p->upvalues[n-1].name;
-      return (name == NULL) ? "" : getstr(name);
+      return (name == NULL) ? "(*no name)" : getstr(name);
     }
     default: return NULL;  /* not a closure */
   }
@@ -1214,7 +1193,7 @@ LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n) {
   const char *name;
   TValue *val = NULL;  /* to avoid warnings */
   lua_lock(L);
-  name = aux_upvalue(index2addr(L, funcindex), n, &val, NULL);
+  name = aux_upvalue(index2addr(L, funcindex), n, &val, NULL, NULL);
   if (name) {
     setobj2s(L, L->top, val);
     api_incr_top(L);
@@ -1227,16 +1206,18 @@ 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 = NULL;  /* to avoid warnings */
-  GCObject *owner = NULL;  /* to avoid warnings */
+  CClosure *owner = NULL;
+  UpVal *uv = NULL;
   StkId fi;
   lua_lock(L);
   fi = index2addr(L, funcindex);
   api_checknelems(L, 1);
-  name = aux_upvalue(fi, n, &val, &owner);
+  name = aux_upvalue(fi, n, &val, &owner, &uv);
   if (name) {
     L->top--;
     setobj(L, val, L->top);
-    luaC_barrier(L, owner, L->top);
+    if (owner) { luaC_barrier(L, owner, L->top); }
+    else if (uv) { luaC_upvalbarrier(L, uv); }
   }
   lua_unlock(L);
   return name;
@@ -1246,9 +1227,9 @@ LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n) {
 static UpVal **getupvalref (lua_State *L, int fidx, int n, LClosure **pf) {
   LClosure *f;
   StkId fi = index2addr(L, fidx);
-  api_check(L, ttisLclosure(fi), "Lua function expected");
+  api_check(ttisLclosure(fi), "Lua function expected");
   f = clLvalue(fi);
-  api_check(L, (1 <= n && n <= f->p->sizeupvalues), "invalid upvalue index");
+  api_check((1 <= n && n <= f->p->sizeupvalues), "invalid upvalue index");
   if (pf) *pf = f;
   return &f->upvals[n - 1];  /* get its upvalue pointer */
 }
@@ -1262,11 +1243,11 @@ LUA_API void *lua_upvalueid (lua_State *L, int fidx, int n) {
     }
     case LUA_TCCL: {  /* C closure */
       CClosure *f = clCvalue(fi);
-      api_check(L, 1 <= n && n <= f->nupvalues, "invalid upvalue index");
+      api_check(1 <= n && n <= f->nupvalues, "invalid upvalue index");
       return &f->upvalue[n - 1];
     }
     default: {
-      api_check(L, 0, "closure expected");
+      api_check(0, "closure expected");
       return NULL;
     }
   }
@@ -1278,7 +1259,11 @@ LUA_API void lua_upvaluejoin (lua_State *L, int fidx1, int n1,
   LClosure *f1;
   UpVal **up1 = getupvalref(L, fidx1, n1, &f1);
   UpVal **up2 = getupvalref(L, fidx2, n2, NULL);
+  luaC_upvdeccount(L, *up1);
   *up1 = *up2;
-  luaC_objbarrier(L, f1, *up2);
+  (*up1)->refcount++;
+  if (upisopen(*up1)) (*up1)->u.open.touched = 1;
+  luaC_upvalbarrier(L, *up1);
 }
 
+

lapi.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h,v 2.6 2009/08/31 14:26:28 roberto Exp roberto $
+** $Id: lapi.h,v 2.7 2009/11/27 15:37:59 roberto Exp roberto $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */
@@ -11,13 +11,13 @@
 #include "llimits.h"
 #include "lstate.h"
 
-#define api_incr_top(L)   {L->top++; api_check(L, L->top <= L->ci->top, \
+#define api_incr_top(L)   {L->top++; api_check(L->top <= L->ci->top, \
 				"stack overflow");}
 
 #define adjustresults(L,nres) \
     { if ((nres) == LUA_MULTRET && L->ci->top < L->top) L->ci->top = L->top; }
 
-#define api_checknelems(L,n)	api_check(L, (n) < (L->top - L->ci->func), \
+#define api_checknelems(L,n)	api_check((n) < (L->top - L->ci->func), \
 				  "not enough elements in the stack")
 
 

lauxlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.247 2012/10/19 15:55:01 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.269 2014/10/17 16:28:21 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -82,12 +82,12 @@ static int pushglobalfuncname (lua_State *L, lua_Debug *ar) {
 
 static void pushfuncname (lua_State *L, lua_Debug *ar) {
   if (*ar->namewhat != '\0')  /* is there a name? */
-    lua_pushfstring(L, "function " LUA_QS, ar->name);
+    lua_pushfstring(L, "function '%s'", ar->name);
   else if (*ar->what == 'm')  /* main? */
       lua_pushliteral(L, "main chunk");
   else if (*ar->what == 'C') {
     if (pushglobalfuncname(L, ar)) {
-      lua_pushfstring(L, "function " LUA_QS, lua_tostring(L, -1));
+      lua_pushfstring(L, "function '%s'", lua_tostring(L, -1));
       lua_remove(L, -2);  /* remove name */
     }
     else
@@ -150,33 +150,40 @@ LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
 ** =======================================================
 */
 
-LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
+LUALIB_API int luaL_argerror (lua_State *L, int arg, const char *extramsg) {
   lua_Debug ar;
   if (!lua_getstack(L, 0, &ar))  /* no stack frame? */
-    return luaL_error(L, "bad argument #%d (%s)", narg, extramsg);
+    return luaL_error(L, "bad argument #%d (%s)", arg, extramsg);
   lua_getinfo(L, "n", &ar);
   if (strcmp(ar.namewhat, "method") == 0) {
-    narg--;  /* do not count `self' */
+    arg--;  /* do not count `self' */
-    if (narg == 0)  /* error is in the self argument itself? */
+    if (arg == 0)  /* error is in the self argument itself? */
-      return luaL_error(L, "calling " LUA_QS " on bad self (%s)",
+      return luaL_error(L, "calling '%s' on bad self (%s)",
                            ar.name, extramsg);
   }
   if (ar.name == NULL)
     ar.name = (pushglobalfuncname(L, &ar)) ? lua_tostring(L, -1) : "?";
-  return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)",
+  return luaL_error(L, "bad argument #%d to '%s' (%s)",
-                        narg, ar.name, extramsg);
+                        arg, ar.name, extramsg);
 }
 
 
-static int typeerror (lua_State *L, int narg, const char *tname) {
+static int typeerror (lua_State *L, int arg, const char *tname) {
-  const char *msg = lua_pushfstring(L, "%s expected, got %s",
+  const char *msg;
-                                    tname, luaL_typename(L, narg));
+  const char *typearg;  /* name for the type of the actual argument */
-  return luaL_argerror(L, narg, msg);
+  if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING)
+    typearg = lua_tostring(L, -1);  /* use the given type name */
+  else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA)
+    typearg = "light userdata";  /* special name for messages */
+  else
+    typearg = luaL_typename(L, arg);  /* standard name */
+  msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg);
+  return luaL_argerror(L, arg, msg);
 }
 
 
-static void tag_error (lua_State *L, int narg, int tag) {
+static void tag_error (lua_State *L, int arg, int tag) {
-  typeerror(L, narg, lua_typename(L, tag));
+  typeerror(L, arg, lua_typename(L, tag));
 }
 
 
@@ -222,7 +229,7 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 }
 
 
-#if !defined(inspectstat)	/* { */
+#if !defined(l_inspectstat)	/* { */
 
 #if defined(LUA_USE_POSIX)
 
@@ -231,13 +238,13 @@ LUALIB_API int luaL_fileresult (lua_State *L, int stat, const char *fname) {
 /*
 ** use appropriate macros to interpret 'pclose' return status
 */
-#define inspectstat(stat,what)  \
+#define l_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 */
+#define l_inspectstat(stat,what)  /* no op */
 
 #endif
 
@@ -249,7 +256,7 @@ LUALIB_API int luaL_execresult (lua_State *L, int stat) {
   if (stat == -1)  /* error? */
     return luaL_fileresult(L, 0, NULL);
   else {
-    inspectstat(stat, what);  /* interpret result */
+    l_inspectstat(stat, what);  /* interpret result */
     if (*what == 'e' && stat == 0)  /* successful termination? */
       lua_pushboolean(L, 1);
     else
@@ -275,6 +282,8 @@ LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
     return 0;  /* leave previous value on top, but return 0 */
   lua_pop(L, 1);
   lua_newtable(L);  /* create metatable */
+  lua_pushstring(L, tname);
+  lua_setfield(L, -2, "__name");  /* metatable.__name = tname */
   lua_pushvalue(L, -1);
   lua_setfield(L, LUA_REGISTRYINDEX, tname);  /* registry.name = metatable */
   return 1;
@@ -317,16 +326,16 @@ LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
 ** =======================================================
 */
 
-LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
+LUALIB_API int luaL_checkoption (lua_State *L, int arg, const char *def,
                                  const char *const lst[]) {
-  const char *name = (def) ? luaL_optstring(L, narg, def) :
+  const char *name = (def) ? luaL_optstring(L, arg, def) :
-                             luaL_checkstring(L, narg);
+                             luaL_checkstring(L, arg);
   int i;
   for (i=0; lst[i]; i++)
     if (strcmp(lst[i], name) == 0)
       return i;
-  return luaL_argerror(L, narg,
+  return luaL_argerror(L, arg,
-                       lua_pushfstring(L, "invalid option " LUA_QS, name));
+                       lua_pushfstring(L, "invalid option '%s'", name));
 }
 
 
@@ -342,77 +351,71 @@ LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg) {
 }
 
 
-LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
+LUALIB_API void luaL_checktype (lua_State *L, int arg, int t) {
-  if (lua_type(L, narg) != t)
+  if (lua_type(L, arg) != t)
-    tag_error(L, narg, t);
+    tag_error(L, arg, t);
 }
 
 
-LUALIB_API void luaL_checkany (lua_State *L, int narg) {
+LUALIB_API void luaL_checkany (lua_State *L, int arg) {
-  if (lua_type(L, narg) == LUA_TNONE)
+  if (lua_type(L, arg) == LUA_TNONE)
-    luaL_argerror(L, narg, "value expected");
+    luaL_argerror(L, arg, "value expected");
 }
 
 
-LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
+LUALIB_API const char *luaL_checklstring (lua_State *L, int arg, size_t *len) {
-  const char *s = lua_tolstring(L, narg, len);
+  const char *s = lua_tolstring(L, arg, len);
-  if (!s) tag_error(L, narg, LUA_TSTRING);
+  if (!s) tag_error(L, arg, LUA_TSTRING);
   return s;
 }
 
 
-LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
+LUALIB_API const char *luaL_optlstring (lua_State *L, int arg,
                                         const char *def, size_t *len) {
-  if (lua_isnoneornil(L, narg)) {
+  if (lua_isnoneornil(L, arg)) {
     if (len)
       *len = (def ? strlen(def) : 0);
     return def;
   }
-  else return luaL_checklstring(L, narg, len);
+  else return luaL_checklstring(L, arg, len);
 }
 
 
-LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
+LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {
   int isnum;
-  lua_Number d = lua_tonumberx(L, narg, &isnum);
+  lua_Number d = lua_tonumberx(L, arg, &isnum);
   if (!isnum)
-    tag_error(L, narg, LUA_TNUMBER);
+    tag_error(L, arg, LUA_TNUMBER);
   return d;
 }
 
 
-LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
+LUALIB_API lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number def) {
-  return luaL_opt(L, luaL_checknumber, narg, def);
+  return luaL_opt(L, luaL_checknumber, arg, def);
 }
 
 
-LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
+static void interror (lua_State *L, int arg) {
+  if (lua_isnumber(L, arg))
+    luaL_argerror(L, arg, "number has no integer representation");
+  else
+    tag_error(L, arg, LUA_TNUMBER);
+}
+
+
+LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int arg) {
   int isnum;
-  lua_Integer d = lua_tointegerx(L, narg, &isnum);
+  lua_Integer d = lua_tointegerx(L, arg, &isnum);
-  if (!isnum)
+  if (!isnum) {
-    tag_error(L, narg, LUA_TNUMBER);
+    interror(L, arg);
+  }
   return d;
 }
 
 
-LUALIB_API lua_Unsigned luaL_checkunsigned (lua_State *L, int narg) {
+LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int arg,
-  int isnum;
-  lua_Unsigned d = lua_tounsignedx(L, narg, &isnum);
-  if (!isnum)
-    tag_error(L, narg, LUA_TNUMBER);
-  return d;
-}
-
-
-LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
                                                       lua_Integer def) {
-  return luaL_opt(L, luaL_checkinteger, narg, def);
+  return luaL_opt(L, luaL_checkinteger, arg, def);
-}
-
-
-LUALIB_API lua_Unsigned luaL_optunsigned (lua_State *L, int narg,
-                                                        lua_Unsigned def) {
-  return luaL_opt(L, luaL_checkunsigned, narg, def);
 }
 
 /* }====================================================== */
@@ -698,23 +701,23 @@ LUALIB_API int luaL_loadstring (lua_State *L, const char *s) {
 
 LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
   if (!lua_getmetatable(L, obj))  /* no metatable? */
-    return 0;
+    return LUA_TNIL;
-  lua_pushstring(L, event);
-  lua_rawget(L, -2);
-  if (lua_isnil(L, -1)) {
-    lua_pop(L, 2);  /* remove metatable and metafield */
-    return 0;
-  }
   else {
-    lua_remove(L, -2);  /* remove only metatable */
+    int tt;
-    return 1;
+    lua_pushstring(L, event);
+    tt = lua_rawget(L, -2);
+    if (tt == LUA_TNIL)  /* is metafield nil? */
+      lua_pop(L, 2);  /* remove metatable and metafield */
+    else
+      lua_remove(L, -2);  /* remove only metatable */
+    return tt;  /* return metafield type */
   }
 }
 
 
 LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
   obj = lua_absindex(L, obj);
-  if (!luaL_getmetafield(L, obj, event))  /* no metafield? */
+  if (luaL_getmetafield(L, obj, event) == LUA_TNIL)  /* no metafield? */
     return 0;
   lua_pushvalue(L, obj);
   lua_call(L, 1, 1);
@@ -722,13 +725,13 @@ LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
 }
 
 
-LUALIB_API int luaL_len (lua_State *L, int idx) {
+LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {
-  int l;
+  lua_Integer l;
   int isnum;
   lua_len(L, idx);
-  l = (int)lua_tointegerx(L, -1, &isnum);
+  l = lua_tointegerx(L, -1, &isnum);
   if (!isnum)
-    luaL_error(L, "object length is not a number");
+    luaL_error(L, "object length is not an integer");
   lua_pop(L, 1);  /* remove object */
   return l;
 }
@@ -737,7 +740,13 @@ LUALIB_API int luaL_len (lua_State *L, int idx) {
 LUALIB_API const char *luaL_tolstring (lua_State *L, int idx, size_t *len) {
   if (!luaL_callmeta(L, idx, "__tostring")) {  /* no metafield? */
     switch (lua_type(L, idx)) {
-      case LUA_TNUMBER:
+      case LUA_TNUMBER: {
+        if (lua_isinteger(L, idx))
+          lua_pushfstring(L, "%I", lua_tointeger(L, idx));
+        else
+          lua_pushfstring(L, "%f", lua_tonumber(L, idx));
+        break;
+      }
       case LUA_TSTRING:
         lua_pushvalue(L, idx);
         break;
@@ -772,8 +781,7 @@ static const char *luaL_findtable (lua_State *L, int idx,
     e = strchr(fname, '.');
     if (e == NULL) e = fname + strlen(fname);
     lua_pushlstring(L, fname, e - fname);
-    lua_rawget(L, -2);
+    if (lua_rawget(L, -2) == LUA_TNIL) {  /* no such field? */
-    if (lua_isnil(L, -1)) {  /* no such field? */
       lua_pop(L, 1);  /* remove this nil */
       lua_createtable(L, 0, (*e == '.' ? 1 : szhint)); /* new table for field */
       lua_pushlstring(L, fname, e - fname);
@@ -810,13 +818,12 @@ static int libsize (const luaL_Reg *l) {
 LUALIB_API void luaL_pushmodule (lua_State *L, const char *modname,
                                  int sizehint) {
   luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 1);  /* get _LOADED table */
-  lua_getfield(L, -1, modname);  /* get _LOADED[modname] */
+  if (lua_getfield(L, -1, modname) != LUA_TTABLE) {  /* no _LOADED[modname]? */
-  if (!lua_istable(L, -1)) {  /* not found? */
     lua_pop(L, 1);  /* remove previous result */
     /* try global variable (and create one if it does not exist) */
     lua_pushglobaltable(L);
     if (luaL_findtable(L, 0, modname, sizehint) != NULL)
-      luaL_error(L, "name conflict for module " LUA_QS, modname);
+      luaL_error(L, "name conflict for module '%s'", modname);
     lua_pushvalue(L, -1);
     lua_setfield(L, -3, modname);  /* _LOADED[modname] = new table */
   }
@@ -846,7 +853,6 @@ LUALIB_API void luaL_openlib (lua_State *L, const char *libname,
 ** Returns with only the table at the stack.
 */
 LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
-  luaL_checkversion(L);
   luaL_checkstack(L, nup, "too many upvalues");
   for (; l->name != NULL; l++) {  /* fill the table with given functions */
     int i;
@@ -864,8 +870,8 @@ LUALIB_API void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
 ** into the stack
 */
 LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
-  lua_getfield(L, idx, fname);
+  if (lua_getfield(L, idx, fname) == LUA_TTABLE)
-  if (lua_istable(L, -1)) return 1;  /* table already there */
+    return 1;  /* table already there */
   else {
     lua_pop(L, 1);  /* remove previous result */
     idx = lua_absindex(L, idx);
@@ -878,22 +884,26 @@ LUALIB_API int luaL_getsubtable (lua_State *L, int idx, const char *fname) {
 
 
 /*
-** stripped-down 'require'. Calls 'openf' to open a module,
+** Stripped-down 'require': After checking "loaded" table, calls 'openf'
-** registers the result in 'package.loaded' table and, if 'glb'
+** to open a module, registers the result in 'package.loaded' table and,
-** is true, also registers the result in the global table.
+** if 'glb' is true, also registers the result in the global table.
 ** Leaves resulting module on the top.
 */
 LUALIB_API void luaL_requiref (lua_State *L, const char *modname,
                                lua_CFunction openf, int glb) {
-  lua_pushcfunction(L, openf);
-  lua_pushstring(L, modname);  /* argument to open function */
-  lua_call(L, 1, 1);  /* open module */
   luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
-  lua_pushvalue(L, -2);  /* make copy of module (call result) */
+  lua_getfield(L, -1, modname);  /* _LOADED[modname] */
-  lua_setfield(L, -2, modname);  /* _LOADED[modname] = module */
+  if (!lua_toboolean(L, -1)) {  /* package not already loaded? */
-  lua_pop(L, 1);  /* remove _LOADED table */
+    lua_pop(L, 1);  /* remove field */
+    lua_pushcfunction(L, openf);
+    lua_pushstring(L, modname);  /* argument to open function */
+    lua_call(L, 1, 1);  /* call 'openf' to open module */
+    lua_pushvalue(L, -1);  /* make copy of module (call result) */
+    lua_setfield(L, -3, modname);  /* _LOADED[modname] = module */
+  }
+  lua_remove(L, -2);  /* remove _LOADED table */
   if (glb) {
-    lua_pushvalue(L, -1);  /* copy of 'mod' */
+    lua_pushvalue(L, -1);  /* copy of module */
     lua_setglobal(L, modname);  /* _G[modname] = module */
   }
 }
@@ -941,19 +951,14 @@ LUALIB_API lua_State *luaL_newstate (void) {
 }
 
 
-LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver) {
+LUALIB_API void luaL_checkversion_ (lua_State *L, lua_Number ver, size_t sz) {
   const lua_Number *v = lua_version(L);
+  if (sz != LUAL_NUMSIZES)  /* check numeric types */
+    luaL_error(L, "core and library have incompatible numeric types");
   if (v != lua_version(NULL))
     luaL_error(L, "multiple Lua VMs detected");
   else if (*v != ver)
     luaL_error(L, "version mismatch: app. needs %f, Lua core provides %f",
                   ver, *v);
-  /* check conversions number -> integer types */
-  lua_pushnumber(L, -(lua_Number)0x1234);
-  if (lua_tointeger(L, -1) != -0x1234 ||
-      lua_tounsigned(L, -1) != (lua_Unsigned)-0x1234)
-    luaL_error(L, "bad conversion number->int;"
-                  " must recompile Lua with proper settings");
-  lua_pop(L, 1);
 }
 

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.119 2011/11/14 17:10:24 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.125 2014/06/26 17:25:11 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -26,30 +26,30 @@ typedef struct luaL_Reg {
 } luaL_Reg;
 
 
-LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver);
+#define LUAL_NUMSIZES	(sizeof(lua_Integer)*16 + sizeof(lua_Number))
-#define luaL_checkversion(L)	luaL_checkversion_(L, LUA_VERSION_NUM)
+
+LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
+#define luaL_checkversion(L)  \
+	  luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
 
 LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
 LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
 LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
-LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
+LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
-LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
+LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
                                                           size_t *l);
-LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
+LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
                                           const char *def, size_t *l);
-LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
+LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
-LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
+LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
 
-LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
+LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
-LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
+LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
                                           lua_Integer def);
-LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int numArg);
-LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int numArg,
-                                            lua_Unsigned def);
 
 LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
-LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
+LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
-LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
+LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
 
 LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
 LUALIB_API void  (luaL_setmetatable) (lua_State *L, const char *tname);
@@ -59,7 +59,7 @@ LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
 LUALIB_API void (luaL_where) (lua_State *L, int lvl);
 LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
 
-LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
+LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
                                    const char *const lst[]);
 
 LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
@@ -83,7 +83,7 @@ LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
 
 LUALIB_API lua_State *(luaL_newstate) (void);
 
-LUALIB_API int (luaL_len) (lua_State *L, int idx);
+LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
 
 LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
                                                   const char *r);
@@ -108,16 +108,13 @@ LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
 #define luaL_newlibtable(L,l)	\
   lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
 
-#define luaL_newlib(L,l)	(luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
+#define luaL_newlib(L,l)  \
+  (luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
 
-#define luaL_argcheck(L, cond,numarg,extramsg)	\
+#define luaL_argcheck(L, cond,arg,extramsg)	\
-		((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
+		((void)((cond) || luaL_argerror(L, (arg), (extramsg))))
 #define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
 #define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
-#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
-#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
-#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
-#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
 
 #define luaL_typename(L,i)	lua_typename(L, lua_type(L,(i)))
 
@@ -207,6 +204,28 @@ LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
 #endif
 
 
+/*
+** {============================================================
+** Compatibility with deprecated conversions
+** =============================================================
+*/
+#if defined(LUA_COMPAT_APIINTCASTS)
+
+#define luaL_checkunsigned(L,a)	((lua_Unsigned)luaL_checkinteger(L,a))
+#define luaL_optunsigned(L,a,d)	\
+	((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
+
+#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
+#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
+
+#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
+#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
+
+#endif
+/* }============================================================ */
+
+
+
 #endif
 
 

lbaselib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.275 2012/12/03 20:18:02 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.302 2014/10/17 16:28:21 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -32,8 +32,7 @@ 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,
+      return luaL_error(L, "'tostring' must return a string to 'print'");
-         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 */
@@ -45,49 +44,64 @@ static int luaB_print (lua_State *L) {
 
 #define SPACECHARS	" \f\n\r\t\v"
 
+static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
+  lua_Unsigned n = 0;
+  int neg = 0;
+  s += strspn(s, SPACECHARS);  /* skip initial spaces */
+  if (*s == '-') { s++; neg = 1; }  /* handle signal */
+  else if (*s == '+') s++;
+  if (!isalnum((unsigned char)*s))  /* no digit? */
+    return NULL;
+  do {
+    int digit = (isdigit((unsigned char)*s)) ? *s - '0'
+                   : toupper((unsigned char)*s) - 'A' + 10;
+    if (digit >= base) return NULL;  /* invalid numeral */
+    n = n * base + digit;
+    s++;
+  } while (isalnum((unsigned char)*s));
+  s += strspn(s, SPACECHARS);  /* skip trailing spaces */
+  if (*s != '\0')  /* invalid trailing characters? */
+    return NULL;
+  *pn = (lua_Integer)((neg) ? (0u - n) : n);
+  return s;
+}
+
+
 static int luaB_tonumber (lua_State *L) {
-  if (lua_isnoneornil(L, 2)) {  /* standard conversion */
+  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);
+    if (lua_type(L, 1) == LUA_TNUMBER) {  /* already a number? */
+      lua_settop(L, 1);  /* yes; return it */
+      return 1;
+    }
+    else {
+      size_t l;
+      const char *s = lua_tolstring(L, 1, &l);
+      if (s != NULL && lua_stringtonumber(L, s) == l + 1)
+        return 1;  /* successful conversion to number */
+      /* else not a number */
+    }
   }
   else {
     size_t l;
-    const char *s = luaL_checklstring(L, 1, &l);
+    const char *s;
-    const char *e = s + l;  /* end point for 's' */
+    lua_Integer n = 0;  /* to avoid warnings */
-    int base = luaL_checkint(L, 2);
+    lua_Integer base = luaL_checkinteger(L, 2);
-    int neg = 0;
+    luaL_checktype(L, 1, LUA_TSTRING);  /* before 'luaL_checklstring'! */
+    s = luaL_checklstring(L, 1, &l);
     luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
-    s += strspn(s, SPACECHARS);  /* skip initial spaces */
+    if (b_str2int(s, (int)base, &n) == s + l) {
-    if (*s == '-') { s++; neg = 1; }  /* handle signal */
+      lua_pushinteger(L, n);
-    else if (*s == '+') s++;
+      return 1;
-    if (isalnum((unsigned char)*s)) {
-      lua_Number n = 0;
-      do {
-        int digit = (isdigit((unsigned char)*s)) ? *s - '0'
-                       : toupper((unsigned char)*s) - 'A' + 10;
-        if (digit >= base) break;  /* invalid numeral; force a fail */
-        n = n * (lua_Number)base + (lua_Number)digit;
-        s++;
-      } while (isalnum((unsigned char)*s));
-      s += strspn(s, SPACECHARS);  /* skip trailing spaces */
-      if (s == e) {  /* no invalid trailing characters? */
-        lua_pushnumber(L, (neg) ? -n : n);
-        return 1;
-      }  /* else not a number */
     }  /* else not a number */
-  }
+  }  /* else not a number */
   lua_pushnil(L);  /* not a number */
   return 1;
 }
 
 
 static int luaB_error (lua_State *L) {
-  int level = luaL_optint(L, 2, 1);
+  int level = (int)luaL_optinteger(L, 2, 1);
   lua_settop(L, 1);
   if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
     luaL_where(L, level);
@@ -114,7 +128,7 @@ static int luaB_setmetatable (lua_State *L) {
   luaL_checktype(L, 1, LUA_TTABLE);
   luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
                     "nil or table expected");
-  if (luaL_getmetafield(L, 1, "__metatable"))
+  if (luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL)
     return luaL_error(L, "cannot change a protected metatable");
   lua_settop(L, 2);
   lua_setmetatable(L, 1);
@@ -160,19 +174,18 @@ 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", "generational", "incremental", NULL};
+    "isrunning", 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};
+    LUA_GCISRUNNING};
   int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
-  int ex = luaL_optint(L, 2, 0);
+  int ex = (int)luaL_optinteger(L, 2, 0);
   int res = lua_gc(L, o, ex);
   switch (o) {
     case LUA_GCCOUNT: {
       int b = lua_gc(L, LUA_GCCOUNTB, 0);
-      lua_pushnumber(L, res + ((lua_Number)b/1024));
+      lua_pushnumber(L, (lua_Number)res + ((lua_Number)b/1024));
-      lua_pushinteger(L, b);
+      return 1;
-      return 2;
     }
     case LUA_GCSTEP: case LUA_GCISRUNNING: {
       lua_pushboolean(L, res);
@@ -186,16 +199,19 @@ static int luaB_collectgarbage (lua_State *L) {
 }
 
 
+/*
+** This function has all type names as upvalues, to maximize performance.
+*/
 static int luaB_type (lua_State *L) {
   luaL_checkany(L, 1);
-  lua_pushstring(L, luaL_typename(L, 1));
+  lua_pushvalue(L, lua_upvalueindex(lua_type(L, 1) + 1));
   return 1;
 }
 
 
 static int pairsmeta (lua_State *L, const char *method, int iszero,
                       lua_CFunction iter) {
-  if (!luaL_getmetafield(L, 1, method)) {  /* no metamethod? */
+  if (luaL_getmetafield(L, 1, method) == LUA_TNIL) {  /* no metamethod? */
     luaL_checktype(L, 1, LUA_TTABLE);  /* argument must be a table */
     lua_pushcfunction(L, iter);  /* will return generator, */
     lua_pushvalue(L, 1);  /* state, */
@@ -227,18 +243,43 @@ static int luaB_pairs (lua_State *L) {
 }
 
 
-static int ipairsaux (lua_State *L) {
+/*
-  int i = luaL_checkint(L, 2);
+** Traversal function for 'ipairs' for raw tables
+*/
+static int ipairsaux_raw (lua_State *L) {
+  lua_Integer i = luaL_checkinteger(L, 2) + 1;
   luaL_checktype(L, 1, LUA_TTABLE);
-  i++;  /* next value */
   lua_pushinteger(L, i);
-  lua_rawgeti(L, 1, i);
+  return (lua_rawgeti(L, 1, i) == LUA_TNIL) ? 1 : 2;
-  return (lua_isnil(L, -1)) ? 1 : 2;
 }
 
 
+/*
+** Traversal function for 'ipairs' for tables with metamethods
+*/
+static int ipairsaux (lua_State *L) {
+  lua_Integer i = luaL_checkinteger(L, 2) + 1;
+  lua_pushinteger(L, i);
+  return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
+}
+
+
+/*
+** This function will use either 'ipairsaux' or 'ipairsaux_raw' to
+** traverse a table, depending on whether the table has metamethods
+** that can affect the traversal.
+*/
 static int luaB_ipairs (lua_State *L) {
-  return pairsmeta(L, "__ipairs", 1, ipairsaux);
+  lua_CFunction iter = (luaL_getmetafield(L, 1, "__index") != LUA_TNIL)
+                       ? ipairsaux : ipairsaux_raw;
+#if defined(LUA_COMPAT_IPAIRS)
+  return pairsmeta(L, "__ipairs", 1, iter);
+#else
+  lua_pushcfunction(L, iter);  /* iteration function */
+  lua_pushvalue(L, 1);  /* state */
+  lua_pushinteger(L, 0);  /* initial value */
+  return 3;
+#endif
 }
 
 
@@ -328,7 +369,8 @@ static int luaB_load (lua_State *L) {
 /* }====================================================== */
 
 
-static int dofilecont (lua_State *L) {
+static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
+  (void)d1;  (void)d2;  /* only to match 'lua_Kfunction' prototype */
   return lua_gettop(L) - 1;
 }
 
@@ -339,14 +381,19 @@ static int luaB_dofile (lua_State *L) {
   if (luaL_loadfile(L, fname) != LUA_OK)
     return lua_error(L);
   lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
-  return dofilecont(L);
+  return dofilecont(L, 0, 0);
 }
 
 
 static int luaB_assert (lua_State *L) {
-  if (!lua_toboolean(L, 1))
+  if (lua_toboolean(L, 1))  /* condition is true? */
-    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
+    return lua_gettop(L);  /* return all arguments */
-  return lua_gettop(L);
+  else {  /* error */
+    if (lua_isnone(L, 2))  /* no error message? */
+      lua_pushliteral(L, "assertion failed!");  /* use standard message */
+    lua_remove(L, 1);  /* remove the condition (if there is one...) */
+    return luaB_error(L);  /* call 'error' */
+  }
 }
 
 
@@ -357,53 +404,57 @@ static int luaB_select (lua_State *L) {
     return 1;
   }
   else {
-    int i = luaL_checkint(L, 1);
+    lua_Integer i = luaL_checkinteger(L, 1);
     if (i < 0) i = n + i;
     else if (i > n) i = n;
     luaL_argcheck(L, 1 <= i, 1, "index out of range");
-    return n - i;
+    return n - (int)i;
   }
 }
 
 
-static int finishpcall (lua_State *L, int status) {
+/*
-  if (!lua_checkstack(L, 1)) {  /* no space for extra boolean? */
+** Continuation function for 'pcall' and 'xpcall'. Both functions
-    lua_settop(L, 0);  /* create space for return values */
+** already pushed a 'true' before doing the call, so in case of success
-    lua_pushboolean(L, 0);
+** 'finishpcall' only has to return everything in the stack minus
-    lua_pushstring(L, "stack overflow");
+** 'extra' values (where 'extra' is exactly the number of items to be
+** ignored).
+*/
+static int finishpcall (lua_State *L, int status, lua_KContext extra) {
+  if (status != LUA_OK && status != LUA_YIELD) {  /* error? */
+    lua_pushboolean(L, 0);  /* first result (false) */
+    lua_pushvalue(L, -2);  /* error message */
     return 2;  /* return false, msg */
   }
-  lua_pushboolean(L, status);  /* first result (status) */
+  else
-  lua_replace(L, 1);  /* put first result in first slot */
+    return lua_gettop(L) - (int)extra;  /* return all results */
-  return lua_gettop(L);
-}
-
-
-static int pcallcont (lua_State *L) {
-  int status = lua_getctx(L, NULL);
-  return finishpcall(L, (status == LUA_YIELD));
 }
 
 
 static int luaB_pcall (lua_State *L) {
   int status;
   luaL_checkany(L, 1);
-  lua_pushnil(L);
+  lua_pushboolean(L, 1);  /* first result if no errors */
-  lua_insert(L, 1);  /* create space for status result */
+  lua_insert(L, 1);  /* put it in place */
-  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, pcallcont);
+  status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
-  return finishpcall(L, (status == LUA_OK));
+  return finishpcall(L, status, 0);
 }
 
 
+/*
+** Do a protected call with error handling. After 'lua_rotate', the
+** stack will have <f, err, true, f, [args...]>; so, the function passes
+** 2 to 'finishpcall' to skip the 2 first values when returning results.
+*/
 static int luaB_xpcall (lua_State *L) {
   int status;
   int n = lua_gettop(L);
-  luaL_argcheck(L, n >= 2, 2, "value expected");
+  luaL_checktype(L, 2, LUA_TFUNCTION);  /* check error function */
-  lua_pushvalue(L, 1);  /* exchange function... */
+  lua_pushboolean(L, 1);  /* first result */
-  lua_copy(L, 2, 1);  /* ...and error handler */
+  lua_pushvalue(L, 1);  /* function */
-  lua_replace(L, 2);
+  lua_rotate(L, 3, 2);  /* move them below function's arguments */
-  status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 0, pcallcont);
+  status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
-  return finishpcall(L, (status == LUA_OK));
+  return finishpcall(L, status, 2);
 }
 
 
@@ -438,21 +489,31 @@ static const luaL_Reg base_funcs[] = {
   {"setmetatable", luaB_setmetatable},
   {"tonumber", luaB_tonumber},
   {"tostring", luaB_tostring},
-  {"type", luaB_type},
   {"xpcall", luaB_xpcall},
+  /* placeholders */
+  {"type", NULL},
+  {"_G", NULL},
+  {"_VERSION", NULL},
   {NULL, NULL}
 };
 
 
 LUAMOD_API int luaopen_base (lua_State *L) {
-  /* set global _G */
+  int i;
-  lua_pushglobaltable(L);
-  lua_pushglobaltable(L);
-  lua_setfield(L, -2, "_G");
   /* open lib into global table */
+  lua_pushglobaltable(L);
   luaL_setfuncs(L, base_funcs, 0);
+  /* set global _G */
+  lua_pushvalue(L, -1);
+  lua_setfield(L, -2, "_G");
+  /* set global _VERSION */
   lua_pushliteral(L, LUA_VERSION);
-  lua_setfield(L, -2, "_VERSION");  /* set global _VERSION */
+  lua_setfield(L, -2, "_VERSION");
+  /* set function 'type' with proper upvalues */
+  for (i = 0; i < LUA_NUMTAGS; i++)  /* push all type names as upvalues */
+    lua_pushstring(L, lua_typename(L, i));
+  lua_pushcclosure(L, luaB_type, LUA_NUMTAGS);
+  lua_setfield(L, -2, "type");
   return 1;
 }
 

lbitlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbitlib.c,v 1.17 2013/02/21 13:44:53 roberto Exp roberto $
+** $Id: lbitlib.c,v 1.26 2014/05/15 19:28:34 roberto Exp roberto $
 ** Standard library for bitwise operations
 ** See Copyright Notice in lua.h
 */
@@ -13,14 +13,23 @@
 #include "lualib.h"
 
 
+#if defined(LUA_COMPAT_BITLIB)		/* { */
+
+
 /* number of bits to consider in a number */
 #if !defined(LUA_NBITS)
 #define LUA_NBITS	32
 #endif
 
 
+/*
+** a lua_Unsigned with its first LUA_NBITS bits equal to 1. (Shift must
+** be made in two parts to avoid problems when LUA_NBITS is equal to the
+** number of bits in a lua_Unsigned.)
+*/
 #define ALLONES		(~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
 
+
 /* macro to trim extra bits */
 #define trim(x)		((x) & ALLONES)
 
@@ -29,13 +38,10 @@
 #define mask(n)		(~((ALLONES << 1) << ((n) - 1)))
 
 
-typedef lua_Unsigned b_uint;
 
-
+static lua_Unsigned andaux (lua_State *L) {
-
-static b_uint andaux (lua_State *L) {
   int i, n = lua_gettop(L);
-  b_uint r = ~(b_uint)0;
+  lua_Unsigned r = ~(lua_Unsigned)0;
   for (i = 1; i <= n; i++)
     r &= luaL_checkunsigned(L, i);
   return trim(r);
@@ -43,14 +49,14 @@ static b_uint andaux (lua_State *L) {
 
 
 static int b_and (lua_State *L) {
-  b_uint r = andaux(L);
+  lua_Unsigned r = andaux(L);
   lua_pushunsigned(L, r);
   return 1;
 }
 
 
 static int b_test (lua_State *L) {
-  b_uint r = andaux(L);
+  lua_Unsigned r = andaux(L);
   lua_pushboolean(L, r != 0);
   return 1;
 }
@@ -58,7 +64,7 @@ static int b_test (lua_State *L) {
 
 static int b_or (lua_State *L) {
   int i, n = lua_gettop(L);
-  b_uint r = 0;
+  lua_Unsigned r = 0;
   for (i = 1; i <= n; i++)
     r |= luaL_checkunsigned(L, i);
   lua_pushunsigned(L, trim(r));
@@ -68,7 +74,7 @@ static int b_or (lua_State *L) {
 
 static int b_xor (lua_State *L) {
   int i, n = lua_gettop(L);
-  b_uint r = 0;
+  lua_Unsigned r = 0;
   for (i = 1; i <= n; i++)
     r ^= luaL_checkunsigned(L, i);
   lua_pushunsigned(L, trim(r));
@@ -77,13 +83,13 @@ static int b_xor (lua_State *L) {
 
 
 static int b_not (lua_State *L) {
-  b_uint r = ~luaL_checkunsigned(L, 1);
+  lua_Unsigned r = ~luaL_checkunsigned(L, 1);
   lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
-static int b_shift (lua_State *L, b_uint r, int i) {
+static int b_shift (lua_State *L, lua_Unsigned r, lua_Integer i) {
   if (i < 0) {  /* shift right? */
     i = -i;
     r = trim(r);
@@ -101,47 +107,48 @@ static int b_shift (lua_State *L, b_uint r, int i) {
 
 
 static int b_lshift (lua_State *L) {
-  return b_shift(L, luaL_checkunsigned(L, 1), luaL_checkint(L, 2));
+  return b_shift(L, luaL_checkunsigned(L, 1), luaL_checkinteger(L, 2));
 }
 
 
 static int b_rshift (lua_State *L) {
-  return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkint(L, 2));
+  return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkinteger(L, 2));
 }
 
 
 static int b_arshift (lua_State *L) {
-  b_uint r = luaL_checkunsigned(L, 1);
+  lua_Unsigned r = luaL_checkunsigned(L, 1);
-  int i = luaL_checkint(L, 2);
+  lua_Integer i = luaL_checkinteger(L, 2);
-  if (i < 0 || !(r & ((b_uint)1 << (LUA_NBITS - 1))))
+  if (i < 0 || !(r & ((lua_Unsigned)1 << (LUA_NBITS - 1))))
     return b_shift(L, r, -i);
   else {  /* arithmetic shift for 'negative' number */
     if (i >= LUA_NBITS) r = ALLONES;
     else
-      r = trim((r >> i) | ~(~(b_uint)0 >> i));  /* add signal bit */
+      r = trim((r >> i) | ~(trim(~(lua_Unsigned)0) >> i));  /* add signal bit */
     lua_pushunsigned(L, r);
     return 1;
   }
 }
 
 
-static int b_rot (lua_State *L, int i) {
+static int b_rot (lua_State *L, lua_Integer d) {
-  b_uint r = luaL_checkunsigned(L, 1);
+  lua_Unsigned r = luaL_checkunsigned(L, 1);
-  i &= (LUA_NBITS - 1);  /* i = i % NBITS */
+  int i = d & (LUA_NBITS - 1);  /* i = d % NBITS */
   r = trim(r);
-  r = (r << i) | (r >> (LUA_NBITS - i));
+  if (i != 0)  /* avoid undefined shift of LUA_NBITS when i == 0 */
+    r = (r << i) | (r >> (LUA_NBITS - i));
   lua_pushunsigned(L, trim(r));
   return 1;
 }
 
 
 static int b_lrot (lua_State *L) {
-  return b_rot(L, luaL_checkint(L, 2));
+  return b_rot(L, luaL_checkinteger(L, 2));
 }
 
 
 static int b_rrot (lua_State *L) {
-  return b_rot(L, -luaL_checkint(L, 2));
+  return b_rot(L, -luaL_checkinteger(L, 2));
 }
 
 
@@ -152,20 +159,20 @@ static int b_rrot (lua_State *L) {
 ** 'width' being used uninitialized.)
 */
 static int fieldargs (lua_State *L, int farg, int *width) {
-  int f = luaL_checkint(L, farg);
+  lua_Integer f = luaL_checkinteger(L, farg);
-  int w = luaL_optint(L, farg + 1, 1);
+  lua_Integer w = luaL_optinteger(L, farg + 1, 1);
   luaL_argcheck(L, 0 <= f, farg, "field cannot be negative");
   luaL_argcheck(L, 0 < w, farg + 1, "width must be positive");
   if (f + w > LUA_NBITS)
     luaL_error(L, "trying to access non-existent bits");
-  *width = w;
+  *width = (int)w;
-  return f;
+  return (int)f;
 }
 
 
 static int b_extract (lua_State *L) {
   int w;
-  b_uint r = luaL_checkunsigned(L, 1);
+  lua_Unsigned r = trim(luaL_checkunsigned(L, 1));
   int f = fieldargs(L, 2, &w);
   r = (r >> f) & mask(w);
   lua_pushunsigned(L, r);
@@ -175,8 +182,8 @@ static int b_extract (lua_State *L) {
 
 static int b_replace (lua_State *L) {
   int w;
-  b_uint r = luaL_checkunsigned(L, 1);
+  lua_Unsigned r = trim(luaL_checkunsigned(L, 1));
-  b_uint v = luaL_checkunsigned(L, 2);
+  lua_Unsigned v = luaL_checkunsigned(L, 2);
   int f = fieldargs(L, 3, &w);
   int m = mask(w);
   v &= m;  /* erase bits outside given width */
@@ -209,3 +216,12 @@ LUAMOD_API int luaopen_bit32 (lua_State *L) {
   return 1;
 }
 
+
+#else					/* }{ */
+
+
+LUAMOD_API int luaopen_bit32 (lua_State *L) {
+  return luaL_error(L, "library 'bit32' has been deprecated");
+}
+
+#endif					/* } */

lcode.c

@@ -1,10 +1,11 @@
 /*
-** $Id: lcode.c,v 2.61 2012/08/14 18:12:34 roberto Exp roberto $
+** $Id: lcode.c,v 2.89 2014/04/29 18:14:16 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
 
 
+#include <math.h>
 #include <stdlib.h>
 
 #define lcode_c
@@ -26,11 +27,29 @@
 #include "lvm.h"
 
 
+/* test for x == -0 */
+#if defined(signbit)
+#define isminuszero(x)	((x) == 0.0 && signbit(x))
+#else
+#define isminuszero(x)	((x) == 0.0 && 1.0/(x) < 0.0)
+#endif
+
+
 #define hasjumps(e)	((e)->t != (e)->f)
 
 
-static int isnumeral(expdesc *e) {
+static int tonumeral(expdesc *e, TValue *v) {
-  return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
+  if (e->t != NO_JUMP || e->f != NO_JUMP)
+    return 0;  /* not a numeral */
+  switch (e->k) {
+    case VKINT:
+      if (v) setivalue(v, e->u.ival);
+      return 1;
+    case VKFLT:
+      if (v) setfltvalue(v, e->u.nval);
+      return 1;
+    default: return 0;
+  }
 }
 
 
@@ -176,7 +195,7 @@ void luaK_patchlist (FuncState *fs, int list, int target) {
 }
 
 
-LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level) {
+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);
@@ -288,25 +307,28 @@ static void freeexp (FuncState *fs, expdesc *e) {
 }
 
 
+/*
+** Use scanner's table to cache position of constants in constant list
+** and try to reuse constants
+*/
 static int addk (FuncState *fs, TValue *key, TValue *v) {
   lua_State *L = fs->ls->L;
-  TValue *idx = luaH_set(L, fs->h, key);
   Proto *f = fs->f;
+  TValue *idx = luaH_set(L, fs->ls->h, key);  /* index scanner table */
   int k, oldsize;
-  if (ttisnumber(idx)) {
+  if (ttisinteger(idx)) {  /* is there an index there? */
-    lua_Number n = nvalue(idx);
+    k = cast_int(ivalue(idx));
-    lua_number2int(k, n);
+    /* correct value? (warning: must distinguish floats from integers!) */
-    if (luaV_rawequalobj(&f->k[k], v))
+    if (k < fs->nk && ttype(&f->k[k]) == ttype(v) &&
-      return k;
+                      luaV_rawequalobj(&f->k[k], v))
-    /* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
+      return k;  /* reuse index */
-       go through and create a new entry for this value */
   }
   /* constant not found; create a new entry */
   oldsize = f->sizek;
   k = fs->nk;
   /* numerical value does not need GC barrier;
      table has no metatable, so it does not need to invalidate cache */
-  setnvalue(idx, cast_num(k));
+  setivalue(idx, k);
   luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants");
   while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
   setobj(L, &f->k[k], v);
@@ -323,20 +345,29 @@ int luaK_stringK (FuncState *fs, TString *s) {
 }
 
 
-int luaK_numberK (FuncState *fs, lua_Number r) {
+/*
-  int n;
+** Integers use userdata as keys to avoid collision with floats with same
-  lua_State *L = fs->ls->L;
+** value; conversion to 'void*' used only for hashing, no "precision"
+** problems
+*/
+int luaK_intK (FuncState *fs, lua_Integer n) {
+  TValue k, o;
+  setpvalue(&k, cast(void*, cast(size_t, n)));
+  setivalue(&o, n);
+  return addk(fs, &k, &o);
+}
+
+
+/*
+** Both NaN and -0.0 should not go to the constant table, as they have
+** problems with the hashing. (NaN is not a valid key, -0.0 collides
+** with +0.0.)
+*/ 
+static int luaK_numberK (FuncState *fs, lua_Number r) {
   TValue o;
-  setnvalue(&o, r);
+  lua_assert(!luai_numisnan(r) && !isminuszero(r));
-  if (r == 0 || luai_numisnan(NULL, r)) {  /* handle -0 and NaN */
+  setfltvalue(&o, r);
-    /* use raw representation as key to avoid numeric problems */
+  return addk(fs, &o, &o);
-    setsvalue(L, L->top++, luaS_newlstr(L, (char *)&r, sizeof(r)));
-    n = addk(fs, L->top - 1, &o);
-    L->top--;
-  }
-  else
-    n = addk(fs, &o, &o);  /* regular case */
-  return n;
 }
 
 
@@ -351,7 +382,7 @@ static int nilK (FuncState *fs) {
   TValue k, v;
   setnilvalue(&v);
   /* cannot use nil as key; instead use table itself to represent nil */
-  sethvalue(fs->ls->L, &k, fs->h);
+  sethvalue(fs->ls->L, &k, fs->ls->h);
   return addk(fs, &k, &v);
 }
 
@@ -433,10 +464,14 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
       luaK_codek(fs, reg, e->u.info);
       break;
     }
-    case VKNUM: {
+    case VKFLT: {
       luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
       break;
     }
+    case VKINT: {
+      luaK_codek(fs, reg, luaK_intK(fs, e->u.ival));
+      break;
+    }
     case VRELOCABLE: {
       Instruction *pc = &getcode(fs, e);
       SETARG_A(*pc, reg);
@@ -538,12 +573,18 @@ int luaK_exp2RK (FuncState *fs, expdesc *e) {
       }
       else break;
     }
-    case VKNUM: {
+    case VKINT: {
+      e->u.info = luaK_intK(fs, e->u.ival);
+      e->k = VK;
+      goto vk;
+    }
+    case VKFLT: {
       e->u.info = luaK_numberK(fs, e->u.nval);
       e->k = VK;
       /* go through */
     }
     case VK: {
+     vk:
       if (e->u.info <= MAXINDEXRK)  /* constant fits in argC? */
         return RKASK(e->u.info);
       else break;
@@ -627,7 +668,7 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
       pc = e->u.info;
       break;
     }
-    case VK: case VKNUM: case VTRUE: {
+    case VK: case VKFLT: case VKINT: case VTRUE: {
       pc = NO_JUMP;  /* always true; do nothing */
       break;
     }
@@ -672,7 +713,7 @@ static void codenot (FuncState *fs, expdesc *e) {
       e->k = VTRUE;
       break;
     }
-    case VK: case VKNUM: case VTRUE: {
+    case VK: case VKFLT: case VKINT: case VTRUE: {
       e->k = VFALSE;
       break;
     }
@@ -710,24 +751,64 @@ void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
 }
 
 
-static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
+/*
-  lua_Number r;
+** return false if folding can raise an error
-  if (!isnumeral(e1) || !isnumeral(e2)) return 0;
+*/
-  if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)
+static int validop (int op, TValue *v1, TValue *v2) {
-    return 0;  /* do not attempt to divide by 0 */
+  lua_Number a, b;
-  r = luaO_arith(op - OP_ADD + LUA_OPADD, e1->u.nval, e2->u.nval);
+  lua_Integer i;
-  e1->u.nval = r;
+  cast_void(a); cast_void(b);  /* macro may not use its arguments */
+  if (luai_numinvalidop(op, (cast_void(tonumber(v1, &a)), a),
+                            (cast_void(tonumber(v2, &b)), b)))
+    return 0;
+  switch (op) {
+    case LUA_OPIDIV:  /* division by 0 and conversion errors */
+      return (tointeger(v1, &i) && tointeger(v2, &i) && i != 0);
+    case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
+    case LUA_OPSHL: case LUA_OPSHR: case LUA_OPBNOT:  /* conversion errors */
+      return (tointeger(v1, &i) && tointeger(v2, &i));
+    case LUA_OPMOD:  /* integer module by 0 */
+      return !(ttisinteger(v1) && ttisinteger(v2) && ivalue(v2) == 0);
+    default: return 1;  /* everything else is valid */
+  }
+}
+
+
+/*
+** Try to "constant-fold" an operation; return 1 iff successful
+*/
+static int constfolding (FuncState *fs, int op, expdesc *e1, expdesc *e2) {
+  TValue v1, v2, res;
+  if (!tonumeral(e1, &v1) || !tonumeral(e2, &v2) || !validop(op, &v1, &v2))
+    return 0;  /* non-numeric operands or not safe to fold */
+  luaO_arith(fs->ls->L, op, &v1, &v2, &res);
+  if (ttisinteger(&res)) {
+    e1->k = VKINT;
+    e1->u.ival = ivalue(&res);
+  }
+  else {
+    lua_Number n = fltvalue(&res);
+    if (luai_numisnan(n) || isminuszero(n))
+      return 0;  /* folds neither NaN nor -0 */
+    e1->k = VKFLT;
+    e1->u.nval = n;
+  }
   return 1;
 }
 
 
 static void codearith (FuncState *fs, OpCode op,
                        expdesc *e1, expdesc *e2, int line) {
-  if (constfolding(op, e1, e2))
+  if (!constfolding(fs, op - OP_ADD + LUA_OPADD, e1, e2)) {
-    return;
+    int o1, o2;
-  else {
+    if (op == OP_UNM || op == OP_BNOT || op == OP_LEN) {
-    int o2 = (op != OP_UNM && op != OP_LEN) ? luaK_exp2RK(fs, e2) : 0;
+      o2 = 0;
-    int o1 = luaK_exp2RK(fs, e1);
+      o1 = luaK_exp2anyreg(fs, e1);  /* cannot operate on constants */
+    }
+    else {  /* regular case (binary operators) */
+      o2 = luaK_exp2RK(fs, e2);
+      o1 = luaK_exp2RK(fs, e1);
+    }
     if (o1 > o2) {
       freeexp(fs, e1);
       freeexp(fs, e2);
@@ -761,23 +842,13 @@ static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
 
 void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line) {
   expdesc e2;
-  e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
+  e2.t = e2.f = NO_JUMP; e2.k = VKINT; e2.u.ival = 0;
   switch (op) {
-    case OPR_MINUS: {
+    case OPR_MINUS: case OPR_BNOT: case OPR_LEN: {
-      if (isnumeral(e))  /* minus constant? */
+      codearith(fs, cast(OpCode, (op - OPR_MINUS) + OP_UNM), e, &e2, line);
-        e->u.nval = luai_numunm(NULL, e->u.nval);  /* fold it */
-      else {
-        luaK_exp2anyreg(fs, e);
-        codearith(fs, OP_UNM, e, &e2, line);
-      }
       break;
     }
     case OPR_NOT: codenot(fs, e); break;
-    case OPR_LEN: {
-      luaK_exp2anyreg(fs, e);  /* cannot operate on constants */
-      codearith(fs, OP_LEN, e, &e2, line);
-      break;
-    }
     default: lua_assert(0);
   }
 }
@@ -797,9 +868,12 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
       luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */
       break;
     }
-    case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
+    case OPR_ADD: case OPR_SUB:
-    case OPR_MOD: case OPR_POW: {
+    case OPR_MUL: case OPR_DIV: case OPR_IDIV:
-      if (!isnumeral(v)) luaK_exp2RK(fs, v);
+    case OPR_MOD: case OPR_POW:
+    case OPR_BAND: case OPR_BOR: case OPR_BXOR:
+    case OPR_SHL: case OPR_SHR: {
+      if (!tonumeral(v, NULL)) luaK_exp2RK(fs, v);
       break;
     }
     default: {
@@ -842,8 +916,10 @@ void luaK_posfix (FuncState *fs, BinOpr op,
       break;
     }
     case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
-    case OPR_MOD: case OPR_POW: {
+    case OPR_IDIV: case OPR_MOD: case OPR_POW:
-      codearith(fs, cast(OpCode, op - OPR_ADD + OP_ADD), e1, e2, line);
+    case OPR_BAND: case OPR_BOR: case OPR_BXOR:
+    case OPR_SHL: case OPR_SHR: {
+      codearith(fs, cast(OpCode, (op - OPR_ADD) + OP_ADD), e1, e2, line);
       break;
     }
     case OPR_EQ: case OPR_LT: case OPR_LE: {

lcode.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h,v 1.57 2011/04/07 18:14:12 roberto Exp roberto $
+** $Id: lcode.h,v 1.62 2013/12/18 14:12:03 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -24,7 +24,11 @@
 ** grep "ORDER OPR" if you change these enums  (ORDER OP)
 */
 typedef enum BinOpr {
-  OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW,
+  OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
+  OPR_DIV,
+  OPR_IDIV,
+  OPR_BAND, OPR_BOR, OPR_BXOR,
+  OPR_SHL, OPR_SHR,
   OPR_CONCAT,
   OPR_EQ, OPR_LT, OPR_LE,
   OPR_NE, OPR_GT, OPR_GE,
@@ -33,7 +37,7 @@ typedef enum BinOpr {
 } BinOpr;
 
 
-typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
+typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
 
 
 #define getcode(fs,e)	((fs)->f->code[(e)->u.info])
@@ -52,7 +56,7 @@ LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
 LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
 LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
 LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
-LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r);
+LUAI_FUNC int luaK_intK (FuncState *fs, lua_Integer n);
 LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
 LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
 LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);

lcorolib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lcorolib.c,v 1.4 2012/04/27 18:59:04 roberto Exp roberto $
+** $Id: lcorolib.c,v 1.6 2014/05/08 13:52:20 roberto Exp roberto $
 ** Coroutine Library
 ** See Copyright Notice in lua.h
 */
@@ -17,6 +17,13 @@
 #include "lualib.h"
 
 
+static lua_State *getco (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argcheck(L, co, 1, "thread expected");
+  return co;
+}
+
+
 static int auxresume (lua_State *L, lua_State *co, int narg) {
   int status;
   if (!lua_checkstack(co, narg)) {
@@ -47,9 +54,8 @@ static int auxresume (lua_State *L, lua_State *co, int narg) {
 
 
 static int luaB_coresume (lua_State *L) {
-  lua_State *co = lua_tothread(L, 1);
+  lua_State *co = getco(L);
   int r;
-  luaL_argcheck(L, co, 1, "coroutine expected");
   r = auxresume(L, co, lua_gettop(L) - 1);
   if (r < 0) {
     lua_pushboolean(L, 0);
@@ -102,8 +108,7 @@ static int luaB_yield (lua_State *L) {
 
 
 static int luaB_costatus (lua_State *L) {
-  lua_State *co = lua_tothread(L, 1);
+  lua_State *co = getco(L);
-  luaL_argcheck(L, co, 1, "coroutine expected");
   if (L == co) lua_pushliteral(L, "running");
   else {
     switch (lua_status(co)) {
@@ -129,6 +134,12 @@ static int luaB_costatus (lua_State *L) {
 }
 
 
+static int luaB_yieldable (lua_State *L) {
+  lua_pushboolean(L, lua_isyieldable(L));
+  return 1;
+}
+
+
 static int luaB_corunning (lua_State *L) {
   int ismain = lua_pushthread(L);
   lua_pushboolean(L, ismain);
@@ -143,6 +154,7 @@ static const luaL_Reg co_funcs[] = {
   {"status", luaB_costatus},
   {"wrap", luaB_cowrap},
   {"yield", luaB_yield},
+  {"isyieldable", luaB_yieldable},
   {NULL, NULL}
 };
 

ldblib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.131 2011/10/24 14:54:05 roberto Exp roberto $
+** $Id: ldblib.c,v 1.142 2014/10/01 11:54:56 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -21,7 +21,6 @@
 #define HOOKKEY		"_HKEY"
 
 
-
 static int db_getregistry (lua_State *L) {
   lua_pushvalue(L, LUA_REGISTRYINDEX);
   return 1;
@@ -57,35 +56,20 @@ static int db_getuservalue (lua_State *L) {
 
 
 static int db_setuservalue (lua_State *L) {
-  if (lua_type(L, 1) == LUA_TLIGHTUSERDATA)
-    luaL_argerror(L, 1, "full userdata expected, got light userdata");
   luaL_checktype(L, 1, LUA_TUSERDATA);
-  if (!lua_isnoneornil(L, 2))
+  luaL_checkany(L, 2);
-    luaL_checktype(L, 2, LUA_TTABLE);
   lua_settop(L, 2);
   lua_setuservalue(L, 1);
   return 1;
 }
 
 
-static void settabss (lua_State *L, const char *i, const char *v) {
+/*
-  lua_pushstring(L, v);
+** Auxiliary function used by several library functions: check for
-  lua_setfield(L, -2, i);
+** an optional thread as function's first argument and set 'arg' with
-}
+** 1 if this argument is present (so that functions can skip it to
-
+** access their other arguments)
-
+*/
-static void settabsi (lua_State *L, const char *i, int v) {
-  lua_pushinteger(L, v);
-  lua_setfield(L, -2, i);
-}
-
-
-static void settabsb (lua_State *L, const char *i, int v) {
-  lua_pushboolean(L, v);
-  lua_setfield(L, -2, i);
-}
-
-
 static lua_State *getthread (lua_State *L, int *arg) {
   if (lua_isthread(L, 1)) {
     *arg = 1;
@@ -93,44 +77,70 @@ static lua_State *getthread (lua_State *L, int *arg) {
   }
   else {
     *arg = 0;
-    return L;
+    return L;  /* function will operate over current thread */
   }
 }
 
 
+/*
+** Variations of 'lua_settable', used by 'db_getinfo' to put results
+** from 'lua_getinfo' into result table. Key is always a string;
+** value can be a string, an int, or a boolean.
+*/
+static void settabss (lua_State *L, const char *k, const char *v) {
+  lua_pushstring(L, v);
+  lua_setfield(L, -2, k);
+}
+
+static void settabsi (lua_State *L, const char *k, int v) {
+  lua_pushinteger(L, v);
+  lua_setfield(L, -2, k);
+}
+
+static void settabsb (lua_State *L, const char *k, int v) {
+  lua_pushboolean(L, v);
+  lua_setfield(L, -2, k);
+}
+
+
+/*
+** In function 'db_getinfo', the call to 'lua_getinfo' may push
+** results on the stack; later it creates the result table to put
+** these objects. Function 'treatstackoption' puts the result from
+** 'lua_getinfo' on top of the result table so that it can call
+** 'lua_setfield'.
+*/
 static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
-  if (L == L1) {
+  if (L == L1)
-    lua_pushvalue(L, -2);
+    lua_rotate(L, -2, 1);  /* exchange object and table */
-    lua_remove(L, -3);
-  }
   else
-    lua_xmove(L1, L, 1);
+    lua_xmove(L1, L, 1);  /* move object to the "main" stack */
-  lua_setfield(L, -2, fname);
+  lua_setfield(L, -2, fname);  /* put object into table */
 }
 
 
+/*
+** Calls 'lua_getinfo' and collects all results in a new table.
+*/
 static int db_getinfo (lua_State *L) {
   lua_Debug ar;
   int arg;
   lua_State *L1 = getthread(L, &arg);
   const char *options = luaL_optstring(L, arg+2, "flnStu");
-  if (lua_isnumber(L, arg+1)) {
+  if (lua_isfunction(L, arg + 1)) {  /* info about a function? */
-    if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {
+    options = lua_pushfstring(L, ">%s", options);  /* add '>' to 'options' */
+    lua_pushvalue(L, arg + 1);  /* move function to 'L1' stack */
+    lua_xmove(L, L1, 1);
+  }
+  else {  /* stack level */
+    if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
       lua_pushnil(L);  /* level out of range */
       return 1;
     }
   }
-  else if (lua_isfunction(L, arg+1)) {
-    lua_pushfstring(L, ">%s", options);
-    options = lua_tostring(L, -1);
-    lua_pushvalue(L, arg+1);
-    lua_xmove(L, L1, 1);
-  }
-  else
-    return luaL_argerror(L, arg+1, "function or level expected");
   if (!lua_getinfo(L1, options, &ar))
     return luaL_argerror(L, arg+2, "invalid option");
-  lua_createtable(L, 0, 2);
+  lua_newtable(L);  /* table to collect results */
   if (strchr(options, 'S')) {
     settabss(L, "source", ar.source);
     settabss(L, "short_src", ar.short_src);
@@ -164,20 +174,21 @@ static int db_getlocal (lua_State *L) {
   lua_State *L1 = getthread(L, &arg);
   lua_Debug ar;
   const char *name;
-  int nvar = luaL_checkint(L, arg+2);  /* local-variable index */
+  int nvar = (int)luaL_checkinteger(L, arg + 2);  /* local-variable index */
   if (lua_isfunction(L, arg + 1)) {  /* function argument? */
     lua_pushvalue(L, arg + 1);  /* push function */
     lua_pushstring(L, lua_getlocal(L, NULL, nvar));  /* push local name */
-    return 1;
+    return 1;  /* return only name (there is no value) */
   }
   else {  /* stack-level argument */
-    if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar))  /* out of range? */
+    int level = (int)luaL_checkinteger(L, arg + 1);
+    if (!lua_getstack(L1, level, &ar))  /* out of range? */
       return luaL_argerror(L, arg+1, "level out of range");
     name = lua_getlocal(L1, &ar, nvar);
     if (name) {
-      lua_xmove(L1, L, 1);  /* push local value */
+      lua_xmove(L1, L, 1);  /* move local value */
       lua_pushstring(L, name);  /* push name */
-      lua_pushvalue(L, -2);  /* re-order */
+      lua_rotate(L, -2, 1);  /* re-order */
       return 2;
     }
     else {
@@ -192,24 +203,28 @@ static int db_setlocal (lua_State *L) {
   int arg;
   lua_State *L1 = getthread(L, &arg);
   lua_Debug ar;
-  if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar))  /* out of range? */
+  int level = (int)luaL_checkinteger(L, arg + 1);
+  if (!lua_getstack(L1, level, &ar))  /* out of range? */
     return luaL_argerror(L, arg+1, "level out of range");
   luaL_checkany(L, arg+3);
   lua_settop(L, arg+3);
   lua_xmove(L, L1, 1);
-  lua_pushstring(L, lua_setlocal(L1, &ar, luaL_checkint(L, arg+2)));
+  lua_pushstring(L, lua_setlocal(L1, &ar, (int)luaL_checkinteger(L, arg+2)));
   return 1;
 }
 
 
+/*
+** get (if 'get' is true) or set an upvalue from a closure
+*/
 static int auxupvalue (lua_State *L, int get) {
   const char *name;
-  int n = luaL_checkint(L, 2);
+  int n = (int)luaL_checkinteger(L, 2);  /* upvalue index */
-  luaL_checktype(L, 1, LUA_TFUNCTION);
+  luaL_checktype(L, 1, LUA_TFUNCTION);  /* closure */
   name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
   if (name == NULL) return 0;
   lua_pushstring(L, name);
-  lua_insert(L, -(get+1));
+  lua_insert(L, -(get+1));  /* no-op if get is false */
   return get + 1;
 }
 
@@ -225,13 +240,15 @@ static int db_setupvalue (lua_State *L) {
 }
 
 
+/*
+** Check whether a given upvalue from a given closure exists and
+** returns its index
+*/
 static int checkupval (lua_State *L, int argf, int argnup) {
-  lua_Debug ar;
+  int nup = (int)luaL_checkinteger(L, argnup);  /* upvalue index */
-  int nup = luaL_checkint(L, argnup);
+  luaL_checktype(L, argf, LUA_TFUNCTION);  /* closure */
-  luaL_checktype(L, argf, LUA_TFUNCTION);
+  luaL_argcheck(L, (lua_getupvalue(L, argf, nup) != NULL), argnup,
-  lua_pushvalue(L, argf);
+                   "invalid upvalue index");
-  lua_getinfo(L, ">u", &ar);
-  luaL_argcheck(L, 1 <= nup && nup <= ar.nups, argnup, "invalid upvalue index");
   return nup;
 }
 
@@ -253,26 +270,36 @@ static int db_upvaluejoin (lua_State *L) {
 }
 
 
+/*
+** The hook table (at registry[HOOKKEY]) maps threads to their current
+** hook function
+*/
 #define gethooktable(L)	luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)
 
 
+/*
+** Call hook function registered at hook table for the current
+** thread (if there is one)
+*/
 static void hookf (lua_State *L, lua_Debug *ar) {
   static const char *const hooknames[] =
     {"call", "return", "line", "count", "tail call"};
   gethooktable(L);
   lua_pushthread(L);
-  lua_rawget(L, -2);
+  if (lua_rawget(L, -2) == LUA_TFUNCTION) {  /* is there a hook function? */
-  if (lua_isfunction(L, -1)) {
+    lua_pushstring(L, hooknames[(int)ar->event]);  /* push event name */
-    lua_pushstring(L, hooknames[(int)ar->event]);
     if (ar->currentline >= 0)
-      lua_pushinteger(L, ar->currentline);
+      lua_pushinteger(L, ar->currentline);  /* push current line */
     else lua_pushnil(L);
     lua_assert(lua_getinfo(L, "lS", ar));
-    lua_call(L, 2, 0);
+    lua_call(L, 2, 0);  /* call hook function */
   }
 }
 
 
+/*
+** Convert a string mask (for 'sethook') into a bit mask
+*/
 static int makemask (const char *smask, int count) {
   int mask = 0;
   if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
@@ -283,6 +310,9 @@ static int makemask (const char *smask, int count) {
 }
 
 
+/*
+** Convert a bit mask (for 'gethook') into a string mask
+*/
 static char *unmakemask (int mask, char *smask) {
   int i = 0;
   if (mask & LUA_MASKCALL) smask[i++] = 'c';
@@ -297,14 +327,14 @@ static int db_sethook (lua_State *L) {
   int arg, mask, count;
   lua_Hook func;
   lua_State *L1 = getthread(L, &arg);
-  if (lua_isnoneornil(L, arg+1)) {
+  if (lua_isnoneornil(L, arg+1)) {  /* no hook? */
     lua_settop(L, arg+1);
     func = NULL; mask = 0; count = 0;  /* turn off hooks */
   }
   else {
     const char *smask = luaL_checkstring(L, arg+2);
     luaL_checktype(L, arg+1, LUA_TFUNCTION);
-    count = luaL_optint(L, arg+3, 0);
+    count = (int)luaL_optinteger(L, arg + 3, 0);
     func = hookf; mask = makemask(smask, count);
   }
   if (gethooktable(L) == 0) {  /* creating hook table? */
@@ -313,9 +343,9 @@ static int db_sethook (lua_State *L) {
     lua_pushvalue(L, -1);
     lua_setmetatable(L, -2);  /* setmetatable(hooktable) = hooktable */
   }
-  lua_pushthread(L1); lua_xmove(L1, L, 1);
+  lua_pushthread(L1); lua_xmove(L1, L, 1);  /* key */
-  lua_pushvalue(L, arg+1);
+  lua_pushvalue(L, arg+1);  /* value */
-  lua_rawset(L, -3);  /* set new hook */
+  lua_rawset(L, -3);  /* hooktable[L1] = new Lua hook */
   lua_sethook(L1, func, mask, count);  /* set hooks */
   return 0;
 }
@@ -332,11 +362,11 @@ static int db_gethook (lua_State *L) {
   else {
     gethooktable(L);
     lua_pushthread(L1); lua_xmove(L1, L, 1);
-    lua_rawget(L, -2);   /* get hook */
+    lua_rawget(L, -2);   /* 1st result = hooktable[L1] */
     lua_remove(L, -2);  /* remove hook table */
   }
-  lua_pushstring(L, unmakemask(mask, buff));
+  lua_pushstring(L, unmakemask(mask, buff));  /* 2nd result = mask */
-  lua_pushinteger(L, lua_gethookcount(L1));
+  lua_pushinteger(L, lua_gethookcount(L1));  /* 3rd result = count */
   return 3;
 }
 
@@ -363,7 +393,7 @@ static int db_traceback (lua_State *L) {
   if (msg == NULL && !lua_isnoneornil(L, arg + 1))  /* non-string 'msg'? */
     lua_pushvalue(L, arg + 1);  /* return it untouched */
   else {
-    int level = luaL_optint(L, arg + 2, (L == L1) ? 1 : 0);
+    int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
     luaL_traceback(L, L1, msg, level);
   }
   return 1;

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 2.89 2012/01/20 22:05:50 roberto Exp roberto $
+** $Id: ldebug.c,v 2.100 2014/07/30 14:00:14 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -50,7 +50,7 @@ static int currentline (CallInfo *ci) {
 /*
 ** this function can be called asynchronous (e.g. during a signal)
 */
-LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
+LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
   if (func == NULL || mask == 0) {  /* turn off hooks? */
     mask = 0;
     func = NULL;
@@ -61,7 +61,6 @@ LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
   L->basehookcount = count;
   resethookcount(L);
   L->hookmask = cast_byte(mask);
-  return 1;
 }
 
 
@@ -272,7 +271,7 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
   if (*what == '>') {
     ci = NULL;
     func = L->top - 1;
-    api_check(L, ttisfunction(func), "function expected");
+    api_check(ttisfunction(func), "function expected");
     what++;  /* skip the '>' */
     L->top--;  /* pop function */
   }
@@ -327,12 +326,20 @@ static void kname (Proto *p, int pc, int c, const char **name) {
 }
 
 
+static int filterpc (int pc, int jmptarget) {
+  if (pc < jmptarget)  /* is code conditional (inside a jump)? */
+    return -1;  /* cannot know who sets that register */
+  else return pc;  /* current position sets that register */
+}
+
+
 /*
 ** try to find last instruction before 'lastpc' that modified register 'reg'
 */
 static int findsetreg (Proto *p, int lastpc, int reg) {
   int pc;
   int setreg = -1;  /* keep last instruction that changed 'reg' */
+  int jmptarget = 0;  /* any code before this address is conditional */
   for (pc = 0; pc < lastpc; pc++) {
     Instruction i = p->code[pc];
     OpCode op = GET_OPCODE(i);
@@ -341,33 +348,33 @@ static int findsetreg (Proto *p, int lastpc, int reg) {
       case OP_LOADNIL: {
         int b = GETARG_B(i);
         if (a <= reg && reg <= a + b)  /* set registers from 'a' to 'a+b' */
-          setreg = pc;
+          setreg = filterpc(pc, jmptarget);
         break;
       }
       case OP_TFORCALL: {
-        if (reg >= a + 2) setreg = pc;  /* affect all regs above its base */
+        if (reg >= a + 2)  /* affect all regs above its base */
+          setreg = filterpc(pc, jmptarget);
         break;
       }
       case OP_CALL:
       case OP_TAILCALL: {
-        if (reg >= a) setreg = pc;  /* affect all registers above base */
+        if (reg >= a)  /* affect all registers above base */
+          setreg = filterpc(pc, jmptarget);
         break;
       }
       case OP_JMP: {
         int b = GETARG_sBx(i);
         int dest = pc + 1 + b;
         /* jump is forward and do not skip `lastpc'? */
-        if (pc < dest && dest <= lastpc)
+        if (pc < dest && dest <= lastpc) {
-          pc += b;  /* do the jump */
+          if (dest > jmptarget)
-        break;
+            jmptarget = dest;  /* update 'jmptarget' */
-      }
+        }
-      case OP_TEST: {
-        if (reg == a) setreg = pc;  /* jumped code can change 'a' */
         break;
       }
       default:
         if (testAMode(op) && reg == a)  /* any instruction that set A */
-          setreg = pc;
+          setreg = filterpc(pc, jmptarget);
         break;
     }
   }
@@ -453,6 +460,7 @@ static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
     case OP_SUB: tm = TM_SUB; break;
     case OP_MUL: tm = TM_MUL; break;
     case OP_DIV: tm = TM_DIV; break;
+    case OP_IDIV: tm = TM_IDIV; break;
     case OP_MOD: tm = TM_MOD; break;
     case OP_POW: tm = TM_POW; break;
     case OP_UNM: tm = TM_UNM; break;
@@ -497,10 +505,9 @@ static const char *getupvalname (CallInfo *ci, const TValue *o,
 }
 
 
-l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
+static const char *varinfo (lua_State *L, const TValue *o) {
+  const char *name;
   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 */
@@ -508,29 +515,41 @@ l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
       kind = getobjname(ci_func(ci)->p, currentpc(ci),
                         cast_int(o - ci->u.l.base), &name);
   }
-  if (kind)
+  return (kind) ? luaO_pushfstring(L, " (%s '%s')", kind, name) : "";
-    luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
-                op, kind, name, t);
-  else
-    luaG_runerror(L, "attempt to %s a %s value", op, t);
 }
 
 
-l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
-  if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
+  const char *t = objtypename(o);
-  lua_assert(!ttisstring(p1) && !ttisnumber(p2));
+  luaG_runerror(L, "attempt to %s a %s value%s", op, t, varinfo(L, o));
+}
+
+
+l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
+  if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
   luaG_typeerror(L, p1, "concatenate");
 }
 
 
 l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
-  TValue temp;
+  lua_Number temp;
-  if (luaV_tonumber(p1, &temp) == NULL)
+  if (!tonumber(p1, &temp))  /* first operand is wrong? */
-    p2 = p1;  /* first operand is wrong */
+    p2 = p1;  /* now second is wrong */
   luaG_typeerror(L, p2, "perform arithmetic on");
 }
 
 
+/*
+** Error when both values are convertible to numbers, but not to integers
+*/
+l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
+  lua_Integer temp;
+  if (!tointeger(p1, &temp))
+    p2 = p1;
+  luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
+}
+
+
 l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
   const char *t1 = objtypename(p1);
   const char *t2 = objtypename(p2);
@@ -578,3 +597,36 @@ l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
   luaG_errormsg(L);
 }
 
+
+void luaG_traceexec (lua_State *L) {
+  CallInfo *ci = L->ci;
+  lu_byte mask = L->hookmask;
+  int counthook = ((mask & LUA_MASKCOUNT) && L->hookcount == 0);
+  if (counthook)
+    resethookcount(L);  /* reset count */
+  if (ci->callstatus & CIST_HOOKYIELD) {  /* called hook last time? */
+    ci->callstatus &= ~CIST_HOOKYIELD;  /* erase mark */
+    return;  /* do not call hook again (VM yielded, so it did not move) */
+  }
+  if (counthook)
+    luaD_hook(L, LUA_HOOKCOUNT, -1);  /* call count hook */
+  if (mask & LUA_MASKLINE) {
+    Proto *p = ci_func(ci)->p;
+    int npc = pcRel(ci->u.l.savedpc, p);
+    int newline = getfuncline(p, npc);
+    if (npc == 0 ||  /* call linehook when enter a new function, */
+        ci->u.l.savedpc <= L->oldpc ||  /* when jump back (loop), or when */
+        newline != getfuncline(p, pcRel(L->oldpc, p)))  /* enter a new line */
+      luaD_hook(L, LUA_HOOKLINE, newline);  /* call line hook */
+  }
+  L->oldpc = ci->u.l.savedpc;
+  if (L->status == LUA_YIELD) {  /* did hook yield? */
+    if (counthook)
+      L->hookcount = 1;  /* undo decrement to zero */
+    ci->u.l.savedpc--;  /* undo increment (resume will increment it again) */
+    ci->callstatus |= CIST_HOOKYIELD;  /* mark that it yielded */
+    ci->func = L->top - 1;  /* protect stack below results */
+    luaD_throw(L, LUA_YIELD);
+  }
+}
+

ldebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.h,v 2.6 2011/06/02 19:31:40 roberto Exp roberto $
+** $Id: ldebug.h,v 2.10 2013/05/06 17:19:11 roberto Exp roberto $
 ** Auxiliary functions from Debug Interface module
 ** See Copyright Notice in lua.h
 */
@@ -13,7 +13,7 @@
 
 #define pcRel(pc, p)	(cast(int, (pc) - (p)->code) - 1)
 
-#define getfuncline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
+#define getfuncline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : -1)
 
 #define resethookcount(L)	(L->hookcount = L->basehookcount)
 
@@ -23,12 +23,17 @@
 
 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_concaterror (lua_State *L, const TValue *p1,
+                                                  const TValue *p2);
 LUAI_FUNC l_noret luaG_aritherror (lua_State *L, const TValue *p1,
                                                  const TValue *p2);
+LUAI_FUNC l_noret luaG_tointerror (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);
+LUAI_FUNC void luaG_traceexec (lua_State *L);
+
 
 #endif

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 2.107 2012/08/28 18:30:45 roberto Exp roberto $
+** $Id: ldo.c,v 2.129 2014/10/08 12:20:26 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -33,6 +33,8 @@
 
 
 
+#define errorstatus(s)	((s) > LUA_YIELD)
+
 
 /*
 ** {======================================================
@@ -46,30 +48,33 @@
 ** C++ code, with _longjmp/_setjmp when asked to use them, and with
 ** longjmp/setjmp otherwise.
 */
-#if !defined(LUAI_THROW)
+#if !defined(LUAI_THROW)				/* { */
+
+#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)	/* { */
 
-#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)
 /* C++ exceptions */
 #define LUAI_THROW(L,c)		throw(c)
 #define LUAI_TRY(L,c,a) \
 	try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; }
 #define luai_jmpbuf		int  /* dummy variable */
 
-#elif defined(LUA_USE_ULONGJMP)
+#elif defined(LUA_USE_POSIX)				/* }{ */
-/* in Unix, try _longjmp/_setjmp (more efficient) */
+
+/* in POSIX, try _longjmp/_setjmp (more efficient) */
 #define LUAI_THROW(L,c)		_longjmp((c)->b, 1)
 #define LUAI_TRY(L,c,a)		if (_setjmp((c)->b) == 0) { a }
 #define luai_jmpbuf		jmp_buf
 
-#else
+#else							/* }{ */
-/* default handling with long jumps */
+
+/* ANSI handling with long jumps */
 #define LUAI_THROW(L,c)		longjmp((c)->b, 1)
 #define LUAI_TRY(L,c,a)		if (setjmp((c)->b) == 0) { a }
 #define luai_jmpbuf		jmp_buf
 
-#endif
+#endif							/* } */
 
-#endif
+#endif							/* } */
 
 
 
@@ -106,15 +111,16 @@ l_noret luaD_throw (lua_State *L, int errcode) {
     LUAI_THROW(L, L->errorJmp);  /* jump to it */
   }
   else {  /* thread has no error handler */
+    global_State *g = G(L);
     L->status = cast_byte(errcode);  /* mark it as dead */
-    if (G(L)->mainthread->errorJmp) {  /* main thread has a handler? */
+    if (g->mainthread->errorJmp) {  /* main thread has a handler? */
-      setobjs2s(L, G(L)->mainthread->top++, L->top - 1);  /* copy error obj. */
+      setobjs2s(L, g->mainthread->top++, L->top - 1);  /* copy error obj. */
-      luaD_throw(G(L)->mainthread, errcode);  /* re-throw in main thread */
+      luaD_throw(g->mainthread, errcode);  /* re-throw in main thread */
     }
     else {  /* no handler at all; abort */
-      if (G(L)->panic) {  /* panic function? */
+      if (g->panic) {  /* panic function? */
         lua_unlock(L);
-        G(L)->panic(L);  /* call it (last chance to jump out) */
+        g->panic(L);  /* call it (last chance to jump out) */
       }
       abort();
     }
@@ -141,10 +147,10 @@ int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
 
 static void correctstack (lua_State *L, TValue *oldstack) {
   CallInfo *ci;
-  GCObject *up;
+  UpVal *up;
   L->top = (L->top - oldstack) + L->stack;
-  for (up = L->openupval; up != NULL; up = up->gch.next)
+  for (up = L->openupval; up != NULL; up = up->u.open.next)
-    gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack;
+    up->v = (up->v - oldstack) + L->stack;
   for (ci = L->ci; ci != NULL; ci = ci->previous) {
     ci->top = (ci->top - oldstack) + L->stack;
     ci->func = (ci->func - oldstack) + L->stack;
@@ -206,7 +212,11 @@ void luaD_shrinkstack (lua_State *L) {
   int inuse = stackinuse(L);
   int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
   if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
-  if (inuse > LUAI_MAXSTACK ||  /* handling stack overflow? */
+  if (L->stacksize > LUAI_MAXSTACK)  /* was handling stack overflow? */
+    luaE_freeCI(L);  /* free all CIs (list grew because of an error) */
+  else
+    luaE_shrinkCI(L);  /* shrink list */
+  if (inuse > LUAI_MAXSTACK ||  /* still handling stack overflow? */
       goodsize >= L->stacksize)  /* would grow instead of shrink? */
     condmovestack(L);  /* don't change stack (change only for debugging) */
   else
@@ -260,6 +270,7 @@ static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
   StkId base, fixed;
   lua_assert(actual >= nfixargs);
   /* move fixed parameters to final position */
+  luaD_checkstack(L, p->maxstacksize);  /* check again for new 'base' */
   fixed = L->top - actual;  /* first fixed argument */
   base = L->top;  /* final position of first argument */
   for (i=0; i<nfixargs; i++) {
@@ -324,12 +335,18 @@ int luaD_precall (lua_State *L, StkId func, int nresults) {
     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 */
+      luaD_checkstack(L, p->maxstacksize);
       for (; n < p->numparams; n++)
         setnilvalue(L->top++);  /* complete missing arguments */
-      base = (!p->is_vararg) ? func + 1 : adjust_varargs(L, p, n);
+      if (!p->is_vararg) {
+        func = restorestack(L, funcr);
+        base = func + 1;
+      }
+      else {
+        base = adjust_varargs(L, p, n);
+        func = restorestack(L, funcr);  /* previous call can change stack */
+      }
       ci = next_ci(L);  /* now 'enter' new function */
       ci->nresults = nresults;
       ci->func = func;
@@ -398,24 +415,27 @@ void luaD_call (lua_State *L, StkId func, int nResults, int allowyield) {
 }
 
 
-static void finishCcall (lua_State *L) {
+/*
+** Completes the execution of an interrupted C function, calling its
+** continuation function.
+*/
+static void finishCcall (lua_State *L, int status) {
   CallInfo *ci = L->ci;
   int n;
-  lua_assert(ci->u.c.k != NULL);  /* must have a continuation */
+  /* must have a continuation and must be able to call it */
-  lua_assert(L->nny == 0);
+  lua_assert(ci->u.c.k != NULL && L->nny == 0);
+  /* error status can only happen in a protected call */
+  lua_assert((ci->callstatus & CIST_YPCALL) || status == LUA_YIELD);
   if (ci->callstatus & CIST_YPCALL) {  /* was inside a pcall? */
     ci->callstatus &= ~CIST_YPCALL;  /* finish 'lua_pcall' */
     L->errfunc = ci->u.c.old_errfunc;
   }
-  /* finish 'lua_callk'/'lua_pcall' */
+  /* finish 'lua_callk'/'lua_pcall'; CIST_YPCALL and 'errfunc' already
+     handled */
   adjustresults(L, ci->nresults);
   /* call continuation function */
-  if (!(ci->callstatus & CIST_STAT))  /* no call status? */
-    ci->u.c.status = LUA_YIELD;  /* 'default' status */
-  lua_assert(ci->u.c.status != LUA_OK);
-  ci->callstatus = (ci->callstatus & ~(CIST_YPCALL | CIST_STAT)) | CIST_YIELDED;
   lua_unlock(L);
-  n = (*ci->u.c.k)(L);
+  n = (*ci->u.c.k)(L, status, ci->u.c.ctx);
   lua_lock(L);
   api_checknelems(L, n);
   /* finish 'luaD_precall' */
@@ -423,13 +443,20 @@ static void finishCcall (lua_State *L) {
 }
 
 
+/*
+** Executes "full continuation" (everything in the stack) of a
+** previously interrupted coroutine until the stack is empty (or another
+** interruption long-jumps out of the loop). If the coroutine is
+** recovering from an error, 'ud' points to the error status, which must
+** be passed to the first continuation function (otherwise the default
+** status is LUA_YIELD).
+*/
 static void unroll (lua_State *L, void *ud) {
-  UNUSED(ud);
+  if (ud != NULL)  /* error status? */
-  for (;;) {
+    finishCcall(L, *(int *)ud);  /* finish 'lua_pcallk' callee */
-    if (L->ci == &L->base_ci)  /* stack is empty? */
+  while (L->ci != &L->base_ci) {  /* something in the stack */
-      return;  /* coroutine finished normally */
     if (!isLua(L->ci))  /* C function? */
-      finishCcall(L);
+      finishCcall(L, LUA_YIELD);  /* complete its execution */
     else {  /* Lua function */
       luaV_finishOp(L);  /* finish interrupted instruction */
       luaV_execute(L);  /* execute down to higher C 'boundary' */
@@ -439,7 +466,8 @@ static void unroll (lua_State *L, void *ud) {
 
 
 /*
-** check whether thread has a suspended protected call
+** Try to find a suspended protected call (a "recover point") for the
+** given thread.
 */
 static CallInfo *findpcall (lua_State *L) {
   CallInfo *ci;
@@ -451,6 +479,11 @@ static CallInfo *findpcall (lua_State *L) {
 }
 
 
+/*
+** Recovers from an error in a coroutine. Finds a recover point (if
+** there is one) and completes the execution of the interrupted
+** 'luaD_pcall'. If there is no recover point, returns zero.
+*/
 static int recover (lua_State *L, int status) {
   StkId oldtop;
   CallInfo *ci = findpcall(L);
@@ -460,12 +493,10 @@ static int recover (lua_State *L, int status) {
   luaF_close(L, oldtop);
   seterrorobj(L, status, oldtop);
   L->ci = ci;
-  L->allowhook = ci->u.c.old_allowhook;
+  L->allowhook = getoah(ci->callstatus);  /* restore original 'allowhook' */
   L->nny = 0;  /* should be zero to be yieldable */
   luaD_shrinkstack(L);
   L->errfunc = ci->u.c.old_errfunc;
-  ci->callstatus |= CIST_STAT;  /* call has error status */
-  ci->u.c.status = status;  /* (here it is) */
   return 1;  /* continue running the coroutine */
 }
 
@@ -484,7 +515,11 @@ static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
 
 
 /*
-** do the work for 'lua_resume' in protected mode
+** Do the work for 'lua_resume' in protected mode. Most of the work
+** depends on the status of the coroutine: initial state, suspended
+** inside a hook, or regularly suspended (optionally with a continuation
+** function), plus erroneous cases: non-suspended coroutine or dead
+** coroutine.
 */
 static void resume (lua_State *L, void *ud) {
   int nCcalls = L->nCcalls;
@@ -502,24 +537,22 @@ static void resume (lua_State *L, void *ud) {
   else if (L->status != LUA_YIELD)
     resume_error(L, "cannot resume dead coroutine", firstArg);
   else {  /* resuming from previous yield */
-    L->status = LUA_OK;
+    L->status = LUA_OK;  /* mark that it is running (again) */
     ci->func = restorestack(L, ci->extra);
     if (isLua(ci))  /* yielded inside a hook? */
       luaV_execute(L);  /* just continue running Lua code */
     else {  /* 'common' yield */
-      if (ci->u.c.k != NULL) {  /* does it have a continuation? */
+      if (ci->u.c.k != NULL) {  /* does it have a continuation function? */
         int n;
-        ci->u.c.status = LUA_YIELD;  /* 'default' status */
-        ci->callstatus |= CIST_YIELDED;
         lua_unlock(L);
-        n = (*ci->u.c.k)(L);  /* call continuation */
+        n = (*ci->u.c.k)(L, LUA_YIELD, ci->u.c.ctx); /* call continuation */
         lua_lock(L);
         api_checknelems(L, n);
         firstArg = L->top - n;  /* yield results come from continuation */
       }
       luaD_poscall(L, firstArg);  /* finish 'luaD_precall' */
     }
-    unroll(L, NULL);
+    unroll(L, NULL);  /* run continuation */
   }
   lua_assert(nCcalls == L->nCcalls);
 }
@@ -527,6 +560,7 @@ static void resume (lua_State *L, void *ud) {
 
 LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
   int status;
+  int oldnny = L->nny;  /* save "number of non-yieldable" calls */
   lua_lock(L);
   luai_userstateresume(L, nargs);
   L->nCcalls = (from) ? from->nCcalls + 1 : 1;
@@ -535,20 +569,19 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
   status = luaD_rawrunprotected(L, resume, L->top - nargs);
   if (status == -1)  /* error calling 'lua_resume'? */
     status = LUA_ERRRUN;
-  else {  /* yield or regular error */
+  else {  /* continue running after recoverable errors */
-    while (status != LUA_OK && status != LUA_YIELD) {  /* error? */
+    while (errorstatus(status) && recover(L, status)) {
-      if (recover(L, status))  /* recover point? */
+      /* unroll continuation */
-        status = luaD_rawrunprotected(L, unroll, NULL);  /* run continuation */
+      status = luaD_rawrunprotected(L, unroll, &status);
-      else {  /* unrecoverable error */
-        L->status = cast_byte(status);  /* mark thread as `dead' */
-        seterrorobj(L, status, L->top);
-        L->ci->top = L->top;
-        break;
-      }
     }
-    lua_assert(status == L->status);
+    if (errorstatus(status)) {  /* unrecoverable error? */
+      L->status = cast_byte(status);  /* mark thread as `dead' */
+      seterrorobj(L, status, L->top);  /* push error message */
+      L->ci->top = L->top;
+    }
+    else lua_assert(status == L->status);  /* normal end or yield */
   }
-  L->nny = 1;  /* do not allow yields */
+  L->nny = oldnny;  /* restore 'nny' */
   L->nCcalls--;
   lua_assert(L->nCcalls == ((from) ? from->nCcalls : 0));
   lua_unlock(L);
@@ -556,7 +589,13 @@ LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
 }
 
 
-LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) {
+LUA_API int lua_isyieldable (lua_State *L) {
+  return (L->nny == 0);
+}
+
+
+LUA_API int lua_yieldk (lua_State *L, int nresults, lua_KContext ctx,
+                        lua_KFunction k) {
   CallInfo *ci = L->ci;
   luai_userstateyield(L, nresults);
   lua_lock(L);
@@ -570,7 +609,7 @@ LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) {
   L->status = LUA_YIELD;
   ci->extra = savestack(L, ci->func);  /* save current 'func' */
   if (isLua(ci)) {  /* inside a hook? */
-    api_check(L, k == NULL, "hooks cannot continue after yielding");
+    api_check(k == NULL, "hooks cannot continue after yielding");
   }
   else {
     if ((ci->u.c.k = k) != NULL)  /* is there a continuation? */
@@ -623,15 +662,14 @@ struct SParser {  /* data to `f_parser' */
 static void checkmode (lua_State *L, const char *mode, const char *x) {
   if (mode && strchr(mode, x[0]) == NULL) {
     luaO_pushfstring(L,
-       "attempt to load a %s chunk (mode is " LUA_QS ")", x, mode);
+       "attempt to load a %s chunk (mode is '%s')", x, mode);
     luaD_throw(L, LUA_ERRSYNTAX);
   }
 }
 
 
 static void f_parser (lua_State *L, void *ud) {
-  int i;
+  LClosure *cl;
-  Closure *cl;
   struct SParser *p = cast(struct SParser *, ud);
   int c = zgetc(p->z);  /* read first character */
   if (c == LUA_SIGNATURE[0]) {
@@ -642,12 +680,8 @@ static void f_parser (lua_State *L, void *ud) {
     checkmode(L, p->mode, "text");
     cl = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c);
   }
-  lua_assert(cl->l.nupvalues == cl->l.p->sizeupvalues);
+  lua_assert(cl->nupvalues == cl->p->sizeupvalues);
-  for (i = 0; i < cl->l.nupvalues; i++) {  /* initialize upvalues */
+  luaF_initupvals(L, cl);
-    UpVal *up = luaF_newupval(L);
-    cl->l.upvals[i] = up;
-    luaC_objbarrier(L, cl, up);
-  }
 }
 
 

ldump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldump.c,v 2.16 2011/11/24 13:25:41 roberto Exp roberto $
+** $Id: ldump.c,v 2.32 2014/06/18 18:35:43 roberto Exp roberto $
 ** save precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -15,159 +15,197 @@
 #include "lstate.h"
 #include "lundump.h"
 
+
 typedef struct {
- lua_State* L;
+  lua_State *L;
- lua_Writer writer;
+  lua_Writer writer;
- void* data;
+  void *data;
- int strip;
+  int strip;
- int status;
+  int status;
 } DumpState;
 
-#define DumpMem(b,n,size,D)	DumpBlock(b,(n)*(size),D)
-#define DumpVar(x,D)		DumpMem(&x,1,sizeof(x),D)
 
-static void DumpBlock(const void* b, size_t size, DumpState* D)
+/*
-{
+** All high-level dumps go through DumpVector; you can change it to
- if (D->status==0)
+** change the endianness of the result
- {
+*/
-  lua_unlock(D->L);
+#define DumpVector(v,n,D)	DumpBlock(v,(n)*sizeof((v)[0]),D)
-  D->status=(*D->writer)(D->L,b,size,D->data);
-  lua_lock(D->L);
- }
-}
 
-static void DumpChar(int y, DumpState* D)
+#define DumpLiteral(s,D)	DumpBlock(s, sizeof(s) - sizeof(char), D)
-{
- char x=(char)y;
- DumpVar(x,D);
-}
 
-static void DumpInt(int x, DumpState* D)
-{
- DumpVar(x,D);
-}
 
-static void DumpNumber(lua_Number x, DumpState* D)
+static void DumpBlock (const void *b, size_t size, DumpState *D) {
-{
+  if (D->status == 0) {
- DumpVar(x,D);
+    lua_unlock(D->L);
-}
+    D->status = (*D->writer)(D->L, b, size, D->data);
-
+    lua_lock(D->L);
-static void DumpVector(const void* b, int n, size_t size, DumpState* D)
-{
- DumpInt(n,D);
- DumpMem(b,n,size,D);
-}
-
-static void DumpString(const TString* s, DumpState* D)
-{
- if (s==NULL)
- {
-  size_t size=0;
-  DumpVar(size,D);
- }
- else
- {
-  size_t size=s->tsv.len+1;		/* include trailing '\0' */
-  DumpVar(size,D);
-  DumpBlock(getstr(s),size*sizeof(char),D);
- }
-}
-
-#define DumpCode(f,D)	 DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
-
-static void DumpFunction(const Proto* f, DumpState* D);
-
-static void DumpConstants(const Proto* f, DumpState* D)
-{
- int i,n=f->sizek;
- DumpInt(n,D);
- for (i=0; i<n; i++)
- {
-  const TValue* o=&f->k[i];
-  DumpChar(ttypenv(o),D);
-  switch (ttypenv(o))
-  {
-   case LUA_TNIL:
-	break;
-   case LUA_TBOOLEAN:
-	DumpChar(bvalue(o),D);
-	break;
-   case LUA_TNUMBER:
-	DumpNumber(nvalue(o),D);
-	break;
-   case LUA_TSTRING:
-	DumpString(rawtsvalue(o),D);
-	break;
-    default: lua_assert(0);
   }
- }
- n=f->sizep;
- DumpInt(n,D);
- for (i=0; i<n; i++) DumpFunction(f->p[i],D);
 }
 
-static void DumpUpvalues(const Proto* f, DumpState* D)
+
-{
+#define DumpVar(x,D)		DumpVector(&x,1,D)
- int i,n=f->sizeupvalues;
+
- DumpInt(n,D);
+
- for (i=0; i<n; i++)
+static void DumpByte (int y, DumpState *D) {
- {
+  lu_byte x = (lu_byte)y;
-  DumpChar(f->upvalues[i].instack,D);
+  DumpVar(x, D);
-  DumpChar(f->upvalues[i].idx,D);
- }
 }
 
-static void DumpDebug(const Proto* f, DumpState* D)
+
-{
+static void DumpInt (int x, DumpState *D) {
- int i,n;
+  DumpVar(x, D);
- DumpString((D->strip) ? NULL : f->source,D);
- n= (D->strip) ? 0 : f->sizelineinfo;
- DumpVector(f->lineinfo,n,sizeof(int),D);
- n= (D->strip) ? 0 : f->sizelocvars;
- DumpInt(n,D);
- for (i=0; i<n; i++)
- {
-  DumpString(f->locvars[i].varname,D);
-  DumpInt(f->locvars[i].startpc,D);
-  DumpInt(f->locvars[i].endpc,D);
- }
- n= (D->strip) ? 0 : f->sizeupvalues;
- DumpInt(n,D);
- for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
 }
 
-static void DumpFunction(const Proto* f, DumpState* D)
+
-{
+static void DumpNumber (lua_Number x, DumpState *D) {
- DumpInt(f->linedefined,D);
+  DumpVar(x, D);
- DumpInt(f->lastlinedefined,D);
- DumpChar(f->numparams,D);
- DumpChar(f->is_vararg,D);
- DumpChar(f->maxstacksize,D);
- DumpCode(f,D);
- DumpConstants(f,D);
- DumpUpvalues(f,D);
- DumpDebug(f,D);
 }
 
-static void DumpHeader(DumpState* D)
+
-{
+static void DumpInteger (lua_Integer x, DumpState *D) {
- lu_byte h[LUAC_HEADERSIZE];
+  DumpVar(x, D);
- luaU_header(h);
- DumpBlock(h,LUAC_HEADERSIZE,D);
 }
 
+
+static void DumpString (const TString *s, DumpState *D) {
+  if (s == NULL)
+    DumpByte(0, D);
+  else {
+    size_t size = s->len + 1;  /* include trailing '\0' */
+    if (size < 0xFF)
+      DumpByte(cast_int(size), D);
+    else {
+      DumpByte(0xFF, D);
+      DumpVar(size, D);
+    }
+    DumpVector(getstr(s), size - 1, D);  /* no need to save '\0' */
+  }
+}
+
+
+static void DumpCode (const Proto *f, DumpState *D) {
+  DumpInt(f->sizecode, D);
+  DumpVector(f->code, f->sizecode, D);
+}
+
+
+static void DumpFunction(const Proto *f, TString *psource, DumpState *D);
+
+static void DumpConstants (const Proto *f, DumpState *D) {
+  int i;
+  int n = f->sizek;
+  DumpInt(n, D);
+  for (i = 0; i < n; i++) {
+    const TValue *o = &f->k[i];
+    DumpByte(ttype(o), D);
+    switch (ttype(o)) {
+    case LUA_TNIL:
+      break;
+    case LUA_TBOOLEAN:
+      DumpByte(bvalue(o), D);
+      break;
+    case LUA_TNUMFLT:
+      DumpNumber(fltvalue(o), D);
+      break;
+    case LUA_TNUMINT:
+      DumpInteger(ivalue(o), D);
+      break;
+    case LUA_TSHRSTR:
+    case LUA_TLNGSTR:
+      DumpString(tsvalue(o), D);
+      break;
+    default:
+      lua_assert(0);
+    }
+  }
+}
+
+
+static void DumpProtos (const Proto *f, DumpState *D) {
+  int i;
+  int n = f->sizep;
+  DumpInt(n, D);
+  for (i = 0; i < n; i++)
+    DumpFunction(f->p[i], f->source, D);
+}
+
+
+static void DumpUpvalues (const Proto *f, DumpState *D) {
+  int i, n = f->sizeupvalues;
+  DumpInt(n, D);
+  for (i = 0; i < n; i++) {
+    DumpByte(f->upvalues[i].instack, D);
+    DumpByte(f->upvalues[i].idx, D);
+  }
+}
+
+
+static void DumpDebug (const Proto *f, DumpState *D) {
+  int i, n;
+  n = (D->strip) ? 0 : f->sizelineinfo;
+  DumpInt(n, D);
+  DumpVector(f->lineinfo, n, D);
+  n = (D->strip) ? 0 : f->sizelocvars;
+  DumpInt(n, D);
+  for (i = 0; i < n; i++) {
+    DumpString(f->locvars[i].varname, D);
+    DumpInt(f->locvars[i].startpc, D);
+    DumpInt(f->locvars[i].endpc, D);
+  }
+  n = (D->strip) ? 0 : f->sizeupvalues;
+  DumpInt(n, D);
+  for (i = 0; i < n; i++)
+    DumpString(f->upvalues[i].name, D);
+}
+
+
+static void DumpFunction (const Proto *f, TString *psource, DumpState *D) {
+  if (D->strip || f->source == psource)
+    DumpString(NULL, D);  /* no debug info or same source as its parent */
+  else
+    DumpString(f->source, D);
+  DumpInt(f->linedefined, D);
+  DumpInt(f->lastlinedefined, D);
+  DumpByte(f->numparams, D);
+  DumpByte(f->is_vararg, D);
+  DumpByte(f->maxstacksize, D);
+  DumpCode(f, D);
+  DumpConstants(f, D);
+  DumpUpvalues(f, D);
+  DumpProtos(f, D);
+  DumpDebug(f, D);
+}
+
+
+static void DumpHeader (DumpState *D) {
+  DumpLiteral(LUA_SIGNATURE, D);
+  DumpByte(LUAC_VERSION, D);
+  DumpByte(LUAC_FORMAT, D);
+  DumpLiteral(LUAC_DATA, D);
+  DumpByte(sizeof(int), D);
+  DumpByte(sizeof(size_t), D);
+  DumpByte(sizeof(Instruction), D);
+  DumpByte(sizeof(lua_Integer), D);
+  DumpByte(sizeof(lua_Number), D);
+  DumpInteger(LUAC_INT, D);
+  DumpNumber(LUAC_NUM, D);
+}
+
+
 /*
 ** dump Lua function as precompiled chunk
 */
-int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
+int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
-{
+              int strip) {
- DumpState D;
+  DumpState D;
- D.L=L;
+  D.L = L;
- D.writer=w;
+  D.writer = w;
- D.data=data;
+  D.data = data;
- D.strip=strip;
+  D.strip = strip;
- D.status=0;
+  D.status = 0;
- DumpHeader(&D);
+  DumpHeader(&D);
- DumpFunction(f,&D);
+  DumpByte(f->sizeupvalues, &D);
- return D.status;
+  DumpFunction(f, NULL, &D);
+  return D.status;
 }
+

lfunc.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.c,v 2.29 2012/05/08 13:53:33 roberto Exp roberto $
+** $Id: lfunc.c,v 2.42 2014/06/18 22:59:29 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -20,95 +20,83 @@
 
 
 
-Closure *luaF_newCclosure (lua_State *L, int n) {
+CClosure *luaF_newCclosure (lua_State *L, int n) {
-  Closure *c = &luaC_newobj(L, LUA_TCCL, sizeCclosure(n), NULL, 0)->cl;
+  GCObject *o = luaC_newobj(L, LUA_TCCL, sizeCclosure(n));
-  c->c.nupvalues = cast_byte(n);
+  CClosure *c = gco2ccl(o);
+  c->nupvalues = cast_byte(n);
   return c;
 }
 
 
-Closure *luaF_newLclosure (lua_State *L, int n) {
+LClosure *luaF_newLclosure (lua_State *L, int n) {
-  Closure *c = &luaC_newobj(L, LUA_TLCL, sizeLclosure(n), NULL, 0)->cl;
+  GCObject *o = luaC_newobj(L, LUA_TLCL, sizeLclosure(n));
-  c->l.p = NULL;
+  LClosure *c = gco2lcl(o);
-  c->l.nupvalues = cast_byte(n);
+  c->p = NULL;
-  while (n--) c->l.upvals[n] = NULL;
+  c->nupvalues = cast_byte(n);
+  while (n--) c->upvals[n] = NULL;
   return c;
 }
 
-
+/*
-UpVal *luaF_newupval (lua_State *L) {
+** fill a closure with new closed upvalues
-  UpVal *uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), NULL, 0)->uv;
+*/
-  uv->v = &uv->u.value;
+void luaF_initupvals (lua_State *L, LClosure *cl) {
-  setnilvalue(uv->v);
+  int i;
-  return uv;
+  for (i = 0; i < cl->nupvalues; i++) {
+    UpVal *uv = luaM_new(L, UpVal);
+    uv->refcount = 1;
+    uv->v = &uv->u.value;  /* make it closed */
+    setnilvalue(uv->v);
+    cl->upvals[i] = uv;
+  }
 }
 
 
 UpVal *luaF_findupval (lua_State *L, StkId level) {
-  global_State *g = G(L);
+  UpVal **pp = &L->openupval;
-  GCObject **pp = &L->openupval;
   UpVal *p;
   UpVal *uv;
-  while (*pp != NULL && (p = gco2uv(*pp))->v >= level) {
+  lua_assert(isintwups(L) || L->openupval == NULL);
-    GCObject *o = obj2gco(p);
+  while (*pp != NULL && (p = *pp)->v >= level) {
-    lua_assert(p->v != &p->u.value);
+    lua_assert(upisopen(p));
-    lua_assert(!isold(o) || isold(obj2gco(L)));
+    if (p->v == level)  /* found a corresponding upvalue? */
-    if (p->v == level) {  /* found a corresponding upvalue? */
+      return p;  /* return it */
-      if (isdead(g, o))  /* is it dead? */
+    pp = &p->u.open.next;
-        changewhite(o);  /* resurrect it */
-      return p;
-    }
-    pp = &p->next;
   }
-  /* not found: create a new one */
+  /* not found: create a new upvalue */
-  uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), pp, 0)->uv;
+  uv = luaM_new(L, UpVal);
+  uv->refcount = 0;
+  uv->u.open.next = *pp;  /* link it to list of open upvalues */
+  uv->u.open.touched = 1;
+  *pp = uv;
   uv->v = level;  /* current value lives in the stack */
-  uv->u.l.prev = &g->uvhead;  /* double link it in `uvhead' list */
+  if (!isintwups(L)) {  /* thread not in list of threads with upvalues? */
-  uv->u.l.next = g->uvhead.u.l.next;
+    L->twups = G(L)->twups;  /* link it to the list */
-  uv->u.l.next->u.l.prev = uv;
+    G(L)->twups = L;
-  g->uvhead.u.l.next = uv;
+  }
-  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
   return uv;
 }
 
 
-static void unlinkupval (UpVal *uv) {
-  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
-  uv->u.l.next->u.l.prev = uv->u.l.prev;  /* remove from `uvhead' list */
-  uv->u.l.prev->u.l.next = uv->u.l.next;
-}
-
-
-void luaF_freeupval (lua_State *L, UpVal *uv) {
-  if (uv->v != &uv->u.value)  /* is it open? */
-    unlinkupval(uv);  /* remove from open list */
-  luaM_free(L, uv);  /* free upvalue */
-}
-
-
 void luaF_close (lua_State *L, StkId level) {
   UpVal *uv;
-  global_State *g = G(L);
+  while (L->openupval != NULL && (uv = L->openupval)->v >= level) {
-  while (L->openupval != NULL && (uv = gco2uv(L->openupval))->v >= level) {
+    lua_assert(upisopen(uv));
-    GCObject *o = obj2gco(uv);
+    L->openupval = uv->u.open.next;  /* remove from `open' list */
-    lua_assert(!isblack(o) && uv->v != &uv->u.value);
+    if (uv->refcount == 0)  /* no references? */
-    L->openupval = uv->next;  /* remove from `open' list */
+      luaM_free(L, uv);  /* free upvalue */
-    if (isdead(g, o))
-      luaF_freeupval(L, uv);  /* free upvalue */
     else {
-      unlinkupval(uv);  /* remove upvalue from 'uvhead' list */
       setobj(L, &uv->u.value, uv->v);  /* move value to upvalue slot */
       uv->v = &uv->u.value;  /* now current value lives here */
-      gch(o)->next = g->allgc;  /* link upvalue into 'allgc' list */
+      luaC_upvalbarrier(L, uv);
-      g->allgc = o;
-      luaC_checkupvalcolor(g, uv);
     }
   }
 }
 
 
 Proto *luaF_newproto (lua_State *L) {
-  Proto *f = &luaC_newobj(L, LUA_TPROTO, sizeof(Proto), NULL, 0)->p;
+  GCObject *o = luaC_newobj(L, LUA_TPROTO, sizeof(Proto));
+  Proto *f = gco2p(o);
   f->k = NULL;
   f->sizek = 0;
   f->p = NULL;

lfunc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.h,v 2.7 2012/01/20 22:05:50 roberto Exp roberto $
+** $Id: lfunc.h,v 2.13 2014/02/18 13:39:37 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -18,14 +18,35 @@
                          cast(int, sizeof(TValue *)*((n)-1)))
 
 
+/* test whether thread is in 'twups' list */
+#define isintwups(L)	(L->twups != L)
+
+
+/*
+** Upvalues for Lua closures
+*/
+struct UpVal {
+  TValue *v;  /* points to stack or to its own value */
+  lu_mem refcount;  /* reference counter */
+  union {
+    struct {  /* (when open) */
+      UpVal *next;  /* linked list */
+      int touched;  /* mark to avoid cycles with dead threads */
+    } open;
+    TValue value;  /* the value (when closed) */
+  } u;
+};
+
+#define upisopen(up)	((up)->v != &(up)->u.value)
+
+
 LUAI_FUNC Proto *luaF_newproto (lua_State *L);
-LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems);
+LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nelems);
-LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems);
+LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nelems);
-LUAI_FUNC UpVal *luaF_newupval (lua_State *L);
+LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
 LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
 LUAI_FUNC void luaF_close (lua_State *L, StkId level);
 LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
-LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
 LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
                                          int pc);
 

lgc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.h,v 2.57 2012/07/04 15:52:38 roberto Exp roberto $
+** $Id: lgc.h,v 2.84 2014/07/19 15:09:37 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -38,36 +38,27 @@
 */
 #define GCSpropagate	0
 #define GCSatomic	1
-#define GCSsweepstring	2
+#define GCSswpallgc	2
-#define GCSsweepudata	3
+#define GCSswpfinobj	3
-#define GCSsweep	4
+#define GCSswptobefnz	4
-#define GCSpause	5
+#define GCSswpend	5
+#define GCScallfin	6
+#define GCSpause	7
 
 
 #define issweepphase(g)  \
-	(GCSsweepstring <= (g)->gcstate && (g)->gcstate <= GCSsweep)
+	(GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
 
-#define isgenerational(g)	((g)->gckind == KGC_GEN)
 
 /*
-** macros to tell when main invariant (white objects cannot point to black
+** macro to tell when main invariant (white objects cannot point to black
-** ones) must be kept. During a non-generational collection, the sweep
+** ones) must be kept. During a collection, the sweep
 ** phase may break the invariant, as objects turned white may point to
 ** still-black objects. The invariant is restored when sweep ends and
-** all objects are white again. During a generational collection, the
+** all objects are white again.
-** invariant must be kept all times.
 */
 
-#define keepinvariant(g)	(isgenerational(g) || g->gcstate <= GCSatomic)
+#define keepinvariant(g)	((g)->gcstate <= GCSatomic)
-
-
-/*
-** Outside the collector, the state in generational mode is kept in
-** 'propagate', so 'keepinvariant' is always true.
-*/
-#define keepinvariantout(g)  \
-  check_exp(g->gcstate == GCSpropagate || !isgenerational(g),  \
-            g->gcstate <= GCSatomic)
 
 
 /*
@@ -87,34 +78,25 @@
 #define WHITE0BIT	0  /* object is white (type 0) */
 #define WHITE1BIT	1  /* object is white (type 1) */
 #define BLACKBIT	2  /* object is black */
-#define FINALIZEDBIT	3  /* object has been separated for finalization */
+#define FINALIZEDBIT	3  /* object has been marked for finalization */
-#define SEPARATED	4  /* object is in 'finobj' list or in 'tobefnz' */
-#define FIXEDBIT	5  /* object is fixed (should not be collected) */
-#define OLDBIT		6  /* object is old (only in generational mode) */
 /* bit 7 is currently used by tests (luaL_checkmemory) */
 
 #define WHITEBITS	bit2mask(WHITE0BIT, WHITE1BIT)
 
 
-#define iswhite(x)      testbits((x)->gch.marked, WHITEBITS)
+#define iswhite(x)      testbits((x)->marked, WHITEBITS)
-#define isblack(x)      testbit((x)->gch.marked, BLACKBIT)
+#define isblack(x)      testbit((x)->marked, BLACKBIT)
 #define isgray(x)  /* neither white nor black */  \
-	(!testbits((x)->gch.marked, WHITEBITS | bitmask(BLACKBIT)))
+	(!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))
 
-#define isold(x)	testbit((x)->gch.marked, OLDBIT)
+#define tofinalize(x)	testbit((x)->marked, FINALIZEDBIT)
 
-/* MOVE OLD rule: whenever an object is moved to the beginning of
+#define otherwhite(g)	((g)->currentwhite ^ WHITEBITS)
-   a GC list, its old bit must be cleared */
-#define resetoldbit(o)	resetbit((o)->gch.marked, OLDBIT)
-
-#define otherwhite(g)	(g->currentwhite ^ WHITEBITS)
 #define isdeadm(ow,m)	(!(((m) ^ WHITEBITS) & (ow)))
-#define isdead(g,v)	isdeadm(otherwhite(g), (v)->gch.marked)
+#define isdead(g,v)	isdeadm(otherwhite(g), (v)->marked)
 
-#define changewhite(x)	((x)->gch.marked ^= WHITEBITS)
+#define changewhite(x)	((x)->marked ^= WHITEBITS)
-#define gray2black(x)	l_setbit((x)->gch.marked, BLACKBIT)
+#define gray2black(x)	l_setbit((x)->marked, BLACKBIT)
-
-#define valiswhite(x)	(iscollectable(x) && iswhite(gcvalue(x)))
 
 #define luaC_white(g)	cast(lu_byte, (g)->currentwhite & WHITEBITS)
 
@@ -124,34 +106,33 @@
 #define luaC_checkGC(L)		luaC_condGC(L, luaC_step(L);)
 
 
-#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p)))  \
+#define luaC_barrier(L,p,v) {  \
+	if (iscollectable(v) && isblack(p) && iswhite(gcvalue(v)))  \
 	luaC_barrier_(L,obj2gco(p),gcvalue(v)); }
 
-#define luaC_barrierback(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p)))  \
+#define luaC_barrierback(L,p,v) {  \
+	if (iscollectable(v) && isblack(p) && iswhite(gcvalue(v)))  \
 	luaC_barrierback_(L,p); }
 
-#define luaC_objbarrier(L,p,o)  \
+#define luaC_objbarrier(L,p,o) {  \
-	{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
+	if (isblack(p) && iswhite(o)) \
 		luaC_barrier_(L,obj2gco(p),obj2gco(o)); }
 
-#define luaC_objbarrierback(L,p,o)  \
+#define luaC_upvalbarrier(L,uv) \
-   { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) luaC_barrierback_(L,p); }
+  { if (iscollectable((uv)->v) && !upisopen(uv)) \
-
+         luaC_upvalbarrier_(L,uv); }
-#define luaC_barrierproto(L,p,c) \
-   { if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); }
 
+LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o);
 LUAI_FUNC void luaC_freeallobjects (lua_State *L);
 LUAI_FUNC void luaC_step (lua_State *L);
-LUAI_FUNC void luaC_forcestep (lua_State *L);
 LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
 LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
-LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz,
+LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz);
-                                 GCObject **list, int offset);
 LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
-LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
+LUAI_FUNC void luaC_barrierback_ (lua_State *L, Table *o);
-LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c);
+LUAI_FUNC void luaC_upvalbarrier_ (lua_State *L, UpVal *uv);
 LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
-LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv);
+LUAI_FUNC void luaC_upvdeccount (lua_State *L, UpVal *uv);
-LUAI_FUNC void luaC_changemode (lua_State *L, int mode);
+
 
 #endif

linit.c

@@ -1,5 +1,5 @@
 /*
-** $Id: linit.c,v 1.31 2011/01/26 16:30:02 roberto Exp roberto $
+** $Id: linit.c,v 1.33 2014/02/06 17:32:33 roberto Exp roberto $
 ** Initialization of libraries for lua.c and other clients
 ** See Copyright Notice in lua.h
 */
@@ -34,9 +34,12 @@ static const luaL_Reg loadedlibs[] = {
   {LUA_IOLIBNAME, luaopen_io},
   {LUA_OSLIBNAME, luaopen_os},
   {LUA_STRLIBNAME, luaopen_string},
-  {LUA_BITLIBNAME, luaopen_bit32},
   {LUA_MATHLIBNAME, luaopen_math},
   {LUA_DBLIBNAME, luaopen_debug},
+  {LUA_UTF8LIBNAME, luaopen_utf8},
+#if defined(LUA_COMPAT_BITLIB)
+  {LUA_BITLIBNAME, luaopen_bit32},
+#endif
   {NULL, NULL}
 };
 

liolib.c

@@ -1,21 +1,23 @@
 /*
-** $Id: liolib.c,v 2.110 2013/03/20 19:40:07 roberto Exp roberto $
+** $Id: liolib.c,v 2.135 2014/10/22 11:44:20 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
+#define	_LARGEFILE_SOURCE	1
+#define _FILE_OFFSET_BITS	64
 #endif
 
 
+#include <ctype.h>
 #include <errno.h>
+#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -29,14 +31,14 @@
 #include "lualib.h"
 
 
-#if !defined(lua_checkmode)
+#if !defined(l_checkmode)
 
 /*
 ** Check whether 'mode' matches '[rwa]%+?b?'.
 ** Change this macro to accept other modes for 'fopen' besides
 ** the standard ones.
 */
-#define lua_checkmode(mode) \
+#define l_checkmode(mode) \
 	(*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&	\
 	(*mode != '+' || ++mode) &&  /* skip if char is '+' */	\
 	(*mode != 'b' || ++mode) &&  /* skip if char is 'b' */	\
@@ -46,74 +48,94 @@
 
 /*
 ** {======================================================
-** lua_popen spawns a new process connected to the current
+** l_popen spawns a new process connected to the current
 ** one through the file streams.
 ** =======================================================
 */
 
-#if !defined(lua_popen)	/* { */
+#if !defined(l_popen)		/* { */
 
-#if defined(LUA_USE_POPEN)	/* { */
+#if defined(LUA_USE_POSIX)	/* { */
 
-#define lua_popen(L,c,m)	((void)L, fflush(NULL), popen(c,m))
+#define l_popen(L,c,m)		(fflush(NULL), popen(c,m))
-#define lua_pclose(L,file)	((void)L, pclose(file))
+#define l_pclose(L,file)	(pclose(file))
 
 #elif defined(LUA_WIN)		/* }{ */
 
-#define lua_popen(L,c,m)		((void)L, _popen(c,m))
+#define l_popen(L,c,m)		(_popen(c,m))
-#define lua_pclose(L,file)		((void)L, _pclose(file))
+#define l_pclose(L,file)	(_pclose(file))
-
 
 #else				/* }{ */
 
-#define lua_popen(L,c,m)		((void)((void)c, m),  \
+/* ANSI definitions */
-		luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
+#define l_popen(L,c,m)  \
-#define lua_pclose(L,file)		((void)((void)L, file), -1)
+	  ((void)((void)c, m), \
-
+	  luaL_error(L, "'popen' not supported"), \
+	  (FILE*)0)
+#define l_pclose(L,file)		((void)L, (void)file, -1)
 
 #endif				/* } */
 
-#endif			/* } */
+#endif				/* } */
 
 /* }====================================================== */
 
 
+#if !defined(l_getc)		/* { */
+
+#if defined(LUA_USE_POSIX)
+#define l_getc(f)		getc_unlocked(f)
+#define l_lockfile(f)		flockfile(f)
+#define l_unlockfile(f)		funlockfile(f)
+#else
+#define l_getc(f)		getc(f)
+#define l_lockfile(f)		((void)0)
+#define l_unlockfile(f)		((void)0)
+#endif
+
+#endif				/* } */
+
+
 /*
 ** {======================================================
-** lua_fseek/lua_ftell: configuration for longer offsets
+** l_fseek: configuration for longer offsets
 ** =======================================================
 */
 
-#if !defined(lua_fseek)	/* { */
+#if !defined(l_fseek)		/* { */
 
-#if defined(LUA_USE_POSIX)
+#if defined(LUA_USE_POSIX)	/* { */
+
+#include <sys/types.h>
 
 #define l_fseek(f,o,w)		fseeko(f,o,w)
 #define l_ftell(f)		ftello(f)
 #define l_seeknum		off_t
 
 #elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \
-   && defined(_MSC_VER) && (_MSC_VER >= 1400)
+   && defined(_MSC_VER) && (_MSC_VER >= 1400)	/* }{ */
-/* Windows (but not DDK) and Visual C++ 2005 or higher */
 
+/* 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
+#else				/* }{ */
 
+/* ANSI definitions */
 #define l_fseek(f,o,w)		fseek(f,o,w)
 #define l_ftell(f)		ftell(f)
 #define l_seeknum		long
 
-#endif
+#endif				/* } */
 
-#endif			/* } */
+#endif				/* } */
 
 /* }====================================================== */
 
 
 #define IO_PREFIX	"_IO_"
+#define IOPREF_LEN	(sizeof(IO_PREFIX)/sizeof(char) - 1)
 #define IO_INPUT	(IO_PREFIX "input")
 #define IO_OUTPUT	(IO_PREFIX "output")
 
@@ -172,9 +194,14 @@ static LStream *newprefile (lua_State *L) {
 }
 
 
+/*
+** Calls the 'close' function from a file handle. The 'volatile' avoids
+** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
+** 32 bits).
+*/
 static int aux_close (lua_State *L) {
   LStream *p = tolstream(L);
-  lua_CFunction cf = p->closef;
+  volatile lua_CFunction cf = p->closef;
   p->closef = NULL;  /* mark stream as closed */
   return (*cf)(L);  /* close it */
 }
@@ -218,7 +245,7 @@ static void opencheck (lua_State *L, const char *fname, const char *mode) {
   LStream *p = newfile(L);
   p->f = fopen(fname, mode);
   if (p->f == NULL)
-    luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno));
+    luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
 }
 
 
@@ -227,7 +254,7 @@ static int io_open (lua_State *L) {
   const char *mode = luaL_optstring(L, 2, "r");
   LStream *p = newfile(L);
   const char *md = mode;  /* to traverse/check mode */
-  luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode");
+  luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
   p->f = fopen(filename, mode);
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
@@ -238,7 +265,7 @@ static int io_open (lua_State *L) {
 */
 static int io_pclose (lua_State *L) {
   LStream *p = tolstream(L);
-  return luaL_execresult(L, lua_pclose(L, p->f));
+  return luaL_execresult(L, l_pclose(L, p->f));
 }
 
 
@@ -246,7 +273,7 @@ static int io_popen (lua_State *L) {
   const char *filename = luaL_checkstring(L, 1);
   const char *mode = luaL_optstring(L, 2, "r");
   LStream *p = newprefile(L);
-  p->f = lua_popen(L, filename, mode);
+  p->f = l_popen(L, filename, mode);
   p->closef = &io_pclose;
   return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
 }
@@ -264,7 +291,7 @@ static FILE *getiofile (lua_State *L, const char *findex) {
   lua_getfield(L, LUA_REGISTRYINDEX, findex);
   p = (LStream *)lua_touserdata(L, -1);
   if (isclosed(p))
-    luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX));
+    luaL_error(L, "standard %s file is closed", findex + IOPREF_LEN);
   return p->f;
 }
 
@@ -300,14 +327,10 @@ static int io_readline (lua_State *L);
 
 
 static void aux_lines (lua_State *L, int toclose) {
-  int i;
   int n = lua_gettop(L) - 1;  /* number of arguments to read */
-  /* ensure that arguments will fit here and into 'io_readline' stack */
-  luaL_argcheck(L, n <= LUA_MINSTACK - 3, LUA_MINSTACK - 3, "too many options");
-  lua_pushvalue(L, 1);  /* file handle */
   lua_pushinteger(L, n);  /* number of arguments to read */
   lua_pushboolean(L, toclose);  /* close/not close file when finished */
-  for (i = 1; i <= n; i++) lua_pushvalue(L, i + 1);  /* copy arguments */
+  lua_rotate(L, 2, 2);  /* move 'n' and 'toclose' to their positions */
   lua_pushcclosure(L, io_readline, 3 + n);
 }
 
@@ -346,13 +369,93 @@ static int io_lines (lua_State *L) {
 */
 
 
-static int read_number (lua_State *L, FILE *f) {
+/* maximum length of a numeral */
-  lua_Number d;
+#define MAXRN		200
-  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
+
-    lua_pushnumber(L, d);
+/* auxiliary structure used by 'read_number' */
-    return 1;
+typedef struct {
+  FILE *f;  /* file being read */
+  int c;  /* current character (look ahead) */
+  int n;  /* number of elements in buffer 'buff' */
+  char buff[MAXRN + 1];  /* +1 for ending '\0' */
+} RN;
+
+
+/*
+** Add current char to buffer (if not out of space) and read next one
+*/
+static int nextc (RN *rn) {
+  if (rn->n >= MAXRN) {  /* buffer overflow? */
+    rn->buff[0] = '\0';  /* invalidate result */
+    return 0;  /* fail */
   }
   else {
+    rn->buff[rn->n++] = rn->c;  /* save current char */
+    rn->c = l_getc(rn->f);  /* read next one */
+    return 1;
+  }
+}
+
+
+/*
+** Accept current char if it is in 'set' (of size 1 or 2)
+*/
+static int test2 (RN *rn, const char *set) {
+  if (rn->c == set[0] || (rn->c == set[1] && rn->c != '\0'))
+    return nextc(rn);
+  else return 0;
+}
+
+
+/*
+** Read a sequence of (hex)digits
+*/
+static int readdigits (RN *rn, int hex) {
+  int count = 0;
+  while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
+    count++;
+  return count;
+}
+
+
+/* access to locale "radix character" (decimal point) */
+#if !defined(l_getlocaledecpoint)
+#define l_getlocaledecpoint()     (localeconv()->decimal_point[0])
+#endif
+
+
+/*
+** Read a number: first reads a valid prefix of a numeral into a buffer.
+** Then it calls 'lua_stringtonumber' to check whether the format is
+** correct and to convert it to a Lua number
+*/
+static int read_number (lua_State *L, FILE *f) {
+  RN rn;
+  int count = 0;
+  int hex = 0;
+  char decp[2] = ".";
+  rn.f = f; rn.n = 0;
+  decp[0] = l_getlocaledecpoint();  /* get decimal point from locale */
+  l_lockfile(rn.f);
+  do { rn.c = l_getc(rn.f); } while (isspace(rn.c));  /* skip spaces */
+  test2(&rn, "-+");  /* optional signal */
+  if (test2(&rn, "0")) {
+    if (test2(&rn, "xX")) hex = 1;  /* numeral is hexadecimal */
+    else count = 1;  /* count initial '0' as a valid digit */
+  }
+  count += readdigits(&rn, hex);  /* integral part */
+  if (test2(&rn, decp))  /* decimal point? */
+    count += readdigits(&rn, hex);  /* fractional part */
+  if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) {  /* exponent mark? */
+    test2(&rn, "-+");  /* exponent signal */
+    readdigits(&rn, 0);  /* exponent digits */
+  }
+  ungetc(rn.c, rn.f);  /* unread look-ahead char */
+  l_unlockfile(rn.f);
+  rn.buff[rn.n] = '\0';  /* finish string */
+  if (lua_stringtonumber(L, rn.buff))  /* is this a valid number? */
+    return 1;  /* ok */
+  else {  /* invalid format */
    lua_pushnil(L);  /* "result" to be removed */
    return 0;  /* read fails */
   }
@@ -361,7 +464,7 @@ static int read_number (lua_State *L, FILE *f) {
 
 static int test_eof (lua_State *L, FILE *f) {
   int c = getc(f);
-  ungetc(c, f);
+  ungetc(c, f);  /* no-op when c == EOF */
   lua_pushlstring(L, NULL, 0);
   return (c != EOF);
 }
@@ -369,40 +472,27 @@ static int test_eof (lua_State *L, FILE *f) {
 
 static int read_line (lua_State *L, FILE *f, int chop) {
   luaL_Buffer b;
+  int c;
   luaL_buffinit(L, &b);
-  for (;;) {
+  l_lockfile(f);
-    size_t l;
+  while ((c = l_getc(f)) != EOF && c != '\n')
-    char *p = luaL_prepbuffer(&b);
+    luaL_addchar(&b, c);
-    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
+  l_unlockfile(f);
-      luaL_pushresult(&b);  /* close buffer */
+  if (!chop && c == '\n') luaL_addchar(&b, c);
-      return (lua_rawlen(L, -1) > 0);  /* check whether read something */
+  luaL_pushresult(&b);  /* close buffer */
-    }
+  return (c == '\n' || lua_rawlen(L, -1) > 0);
-    l = strlen(p);
-    if (l == 0 || p[l-1] != '\n')
-      luaL_addsize(&b, l);
-    else {
-      luaL_addsize(&b, l - chop);  /* chop 'eol' if needed */
-      luaL_pushresult(&b);  /* close buffer */
-      return 1;  /* read at least an `eol' */
-    }
-  }
 }
 
 
-#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 */
+  size_t nr;
   luaL_Buffer b;
   luaL_buffinit(L, &b);
-  for (;;) {
+  do {  /* read file in chunks of LUAL_BUFFERSIZE bytes */
-    char *p = luaL_prepbuffsize(&b, rlen);
+    char *p = luaL_prepbuffsize(&b, LUAL_BUFFERSIZE);
-    size_t nr = fread(p, sizeof(char), rlen, f);
+    nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
     luaL_addsize(&b, nr);
-    if (nr < rlen) break;  /* eof? */
+  } while (nr == LUAL_BUFFERSIZE);
-    else if (rlen <= (MAX_SIZE_T / 4))  /* avoid buffers too large */
-      rlen *= 2;  /* double buffer size at each iteration */
-  }
   luaL_pushresult(&b);  /* close buffer */
 }
 
@@ -438,9 +528,9 @@ static int g_read (lua_State *L, FILE *f, int first) {
         success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
       }
       else {
-        const char *p = lua_tostring(L, n);
+        const char *p = luaL_checkstring(L, n);
-        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
+        if (*p == '*') p++;  /* skip optional '*' (for compatibility) */
-        switch (p[1]) {
+        switch (*p) {
           case 'n':  /* number */
             success = read_number(L, f);
             break;
@@ -487,11 +577,12 @@ static int io_readline (lua_State *L) {
   if (isclosed(p))  /* file is already closed? */
     return luaL_error(L, "file is already closed");
   lua_settop(L , 1);
+  luaL_checkstack(L, n, "too many arguments");
   for (i = 1; i <= n; i++)  /* push arguments to 'g_read' */
     lua_pushvalue(L, lua_upvalueindex(3 + i));
   n = g_read(L, p->f, 2);  /* 'n' is number of results */
   lua_assert(n > 0);  /* should return at least a nil */
-  if (!lua_isnil(L, -n))  /* read at least one value? */
+  if (lua_toboolean(L, -n))  /* read at least one value? */
     return n;  /* return them */
   else {  /* first result is nil: EOF or error */
     if (n > 1) {  /* is there error information? */
@@ -516,8 +607,10 @@ static int g_write (lua_State *L, FILE *f, int arg) {
   for (; nargs--; arg++) {
     if (lua_type(L, arg) == LUA_TNUMBER) {
       /* optimization: could be done exactly as for strings */
-      status = status &&
+      int len = lua_isinteger(L, arg)
-          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
+                ? fprintf(f, LUA_INTEGER_FMT, lua_tointeger(L, arg))
+                : fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg));
+      status = status && (len > 0);
     }
     else {
       size_t l;
@@ -547,15 +640,15 @@ static int f_seek (lua_State *L) {
   static const char *const modenames[] = {"set", "cur", "end", NULL};
   FILE *f = tofile(L);
   int op = luaL_checkoption(L, 2, "cur", modenames);
-  lua_Number p3 = luaL_optnumber(L, 3, 0);
+  lua_Integer p3 = luaL_optinteger(L, 3, 0);
   l_seeknum offset = (l_seeknum)p3;
-  luaL_argcheck(L, (lua_Number)offset == p3, 3,
+  luaL_argcheck(L, (lua_Integer)offset == p3, 3,
                   "not an integer in proper range");
   op = l_fseek(f, offset, mode[op]);
   if (op)
     return luaL_fileresult(L, 0, NULL);  /* error */
   else {
-    lua_pushnumber(L, (lua_Number)l_ftell(f));
+    lua_pushinteger(L, (lua_Integer)l_ftell(f));
     return 1;
   }
 }
@@ -567,7 +660,7 @@ static int f_setvbuf (lua_State *L) {
   FILE *f = tofile(L);
   int op = luaL_checkoption(L, 2, NULL, modenames);
   lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
-  int res = setvbuf(f, NULL, mode[op], sz);
+  int res = setvbuf(f, NULL, mode[op], (size_t)sz);
   return luaL_fileresult(L, res == 0, NULL);
 }
 

llex.c

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 2.62 2012/12/05 19:57:00 roberto Exp roberto $
+** $Id: llex.c,v 2.83 2014/10/17 16:28:21 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -15,6 +15,7 @@
 
 #include "lctype.h"
 #include "ldo.h"
+#include "lgc.h"
 #include "llex.h"
 #include "lobject.h"
 #include "lparser.h"
@@ -38,8 +39,9 @@ static const char *const luaX_tokens [] = {
     "end", "false", "for", "function", "goto", "if",
     "in", "local", "nil", "not", "or", "repeat",
     "return", "then", "true", "until", "while",
-    "..", "...", "==", ">=", "<=", "~=", "::", "<eof>",
+    "//", "..", "...", "==", ">=", "<=", "~=",
-    "<number>", "<name>", "<string>"
+    "<<", ">>", "::", "<eof>",
+    "<number>", "<number>", "<name>", "<string>"
 };
 
 
@@ -53,7 +55,7 @@ static void save (LexState *ls, int c) {
   Mbuffer *b = ls->buff;
   if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
     size_t newsize;
-    if (luaZ_sizebuffer(b) >= MAX_SIZET/2)
+    if (luaZ_sizebuffer(b) >= MAX_SIZE/2)
       lexerror(ls, "lexical element too long", 0);
     newsize = luaZ_sizebuffer(b) * 2;
     luaZ_resizebuffer(ls->L, b, newsize);
@@ -64,24 +66,25 @@ static void save (LexState *ls, int c) {
 
 void luaX_init (lua_State *L) {
   int i;
+  TString *e = luaS_new(L, LUA_ENV);  /* create env name */
+  luaC_fix(L, obj2gco(e));  /* never collect this name */
   for (i=0; i<NUM_RESERVED; i++) {
     TString *ts = luaS_new(L, luaX_tokens[i]);
-    luaS_fix(ts);  /* reserved words are never collected */
+    luaC_fix(L, obj2gco(ts));  /* reserved words are never collected */
-    ts->tsv.extra = cast_byte(i+1);  /* reserved word */
+    ts->extra = cast_byte(i+1);  /* reserved word */
   }
 }
 
 
 const char *luaX_token2str (LexState *ls, int token) {
   if (token < FIRST_RESERVED) {  /* single-byte symbols? */
-    lua_assert(token == cast(unsigned char, token));
+    lua_assert(token == cast_uchar(token));
-    return (lisprint(token)) ? luaO_pushfstring(ls->L, LUA_QL("%c"), token) :
+    return luaO_pushfstring(ls->L, "'%c'", token);
-                              luaO_pushfstring(ls->L, "char(%d)", token);
   }
   else {
     const char *s = luaX_tokens[token - FIRST_RESERVED];
     if (token < TK_EOS)  /* fixed format (symbols and reserved words)? */
-      return luaO_pushfstring(ls->L, LUA_QS, s);
+      return luaO_pushfstring(ls->L, "'%s'", s);
     else  /* names, strings, and numerals */
       return s;
   }
@@ -90,11 +93,10 @@ const char *luaX_token2str (LexState *ls, int token) {
 
 static const char *txtToken (LexState *ls, int token) {
   switch (token) {
-    case TK_NAME:
+    case TK_NAME: case TK_STRING:
-    case TK_STRING:
+    case TK_FLT: case TK_INT:
-    case TK_NUMBER:
       save(ls, '\0');
-      return luaO_pushfstring(ls->L, LUA_QS, luaZ_buffer(ls->buff));
+      return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff));
     default:
       return luaX_token2str(ls, token);
   }
@@ -117,22 +119,25 @@ l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
 
 
 /*
-** creates a new string and anchors it in function's table so that
+** creates a new string and anchors it in scanner's table so that
-** it will not be collected until the end of the function's compilation
+** it will not be collected until the end of the compilation
-** (by that time it should be anchored in function's prototype)
+** (by that time it should be anchored somewhere)
 */
 TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
   lua_State *L = ls->L;
   TValue *o;  /* entry for `str' */
   TString *ts = luaS_newlstr(L, str, l);  /* create new string */
   setsvalue2s(L, L->top++, ts);  /* temporarily anchor it in stack */
-  o = luaH_set(L, ls->fs->h, L->top - 1);
+  o = luaH_set(L, ls->h, L->top - 1);
-  if (ttisnil(o)) {  /* not in use yet? (see 'addK') */
+  if (ttisnil(o)) {  /* not in use yet? */
     /* boolean value does not need GC barrier;
        table has no metatable, so it does not need to invalidate cache */
     setbvalue(o, 1);  /* t[string] = true */
     luaC_checkGC(L);
   }
+  else {  /* string already present */
+    ts = tsvalue(keyfromval(o));  /* re-use value previously stored */
+  }
   L->top--;  /* remove string from stack */
   return ts;
 }
@@ -164,8 +169,7 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
   ls->linenumber = 1;
   ls->lastline = 1;
   ls->source = source;
-  ls->envn = luaS_new(L, LUA_ENV);  /* create env name */
+  ls->envn = luaS_new(L, LUA_ENV);  /* get env name */
-  luaS_fix(ls->envn);  /* never collect this name */
   luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
 }
 
@@ -178,12 +182,26 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
 */
 
 
+static int check_next1 (LexState *ls, int c) {
+  if (ls->current == c) {
+    next(ls);
+    return 1;
+  }
+  else return 0;
+}
 
-static int check_next (LexState *ls, const char *set) {
+
-  if (ls->current == '\0' || !strchr(set, ls->current))
+/*
-    return 0;
+** Check whether current char is in set 'set' (with two chars) and
-  save_and_next(ls);
+** saves it
-  return 1;
+*/
+static int check_next2 (LexState *ls, const char *set) {
+  lua_assert(set[2] == '\0');
+  if (ls->current == set[0] || ls->current == set[1]) {
+    save_and_next(ls);
+    return 1;
+  }
+  else return 0;
 }
 
 
@@ -191,59 +209,73 @@ 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) {
-  size_t n = luaZ_bufflen(ls->buff);
+  if (from != to) {
-  char *p = luaZ_buffer(ls->buff);
+    size_t n = luaZ_bufflen(ls->buff);
-  while (n--)
+    char *p = luaZ_buffer(ls->buff);
-    if (p[n] == from) p[n] = to;
+    while (n--)
+      if (p[n] == from) p[n] = to;
+  }
 }
 
 
-#if !defined(getlocaledecpoint)
+#if !defined(l_getlocaledecpoint)
-#define getlocaledecpoint()	(localeconv()->decimal_point[0])
+#define l_getlocaledecpoint()	(localeconv()->decimal_point[0])
 #endif
 
 
-#define buff2d(b,e)	luaO_str2d(luaZ_buffer(b), luaZ_bufflen(b) - 1, e)
+#define buff2num(b,o)	(luaO_str2num(luaZ_buffer(b), o) != 0)
 
 /*
 ** in case of format error, try to change decimal point separator to
 ** the one defined in the current locale and check again
 */
-static void trydecpoint (LexState *ls, SemInfo *seminfo) {
+static void trydecpoint (LexState *ls, TValue *o) {
   char old = ls->decpoint;
-  ls->decpoint = getlocaledecpoint();
+  ls->decpoint = l_getlocaledecpoint();
   buffreplace(ls, old, ls->decpoint);  /* try new decimal separator */
-  if (!buff2d(ls->buff, &seminfo->r)) {
+  if (!buff2num(ls->buff, o)) {
     /* format error with correct decimal point: no more options */
     buffreplace(ls, ls->decpoint, '.');  /* undo change (for error message) */
-    lexerror(ls, "malformed number", TK_NUMBER);
+    lexerror(ls, "malformed number", TK_FLT);
   }
 }
 
 
 /* LUA_NUMBER */
 /*
-** this function is quite liberal in what it accepts, as 'luaO_str2d'
+** this function is quite liberal in what it accepts, as 'luaO_str2num'
 ** will reject ill-formed numerals.
 */
-static void read_numeral (LexState *ls, SemInfo *seminfo) {
+static int read_numeral (LexState *ls, SemInfo *seminfo) {
+  TValue obj;
   const char *expo = "Ee";
   int first = ls->current;
   lua_assert(lisdigit(ls->current));
   save_and_next(ls);
-  if (first == '0' && check_next(ls, "Xx"))  /* hexadecimal? */
+  if (first == '0' && check_next2(ls, "xX"))  /* hexadecimal? */
     expo = "Pp";
   for (;;) {
-    if (check_next(ls, expo))  /* exponent part? */
+    if (check_next2(ls, expo))  /* exponent part? */
-      check_next(ls, "+-");  /* optional exponent sign */
+      check_next2(ls, "-+");  /* optional exponent sign */
-    if (lisxdigit(ls->current) || ls->current == '.')
+    if (lisxdigit(ls->current))
       save_and_next(ls);
-    else  break;
+    else if (ls->current == '.')
+      save_and_next(ls);
+    else break;
   }
   save(ls, '\0');
   buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
-  if (!buff2d(ls->buff, &seminfo->r))  /* format error? */
+  if (!buff2num(ls->buff, &obj))  /* format error? */
-    trydecpoint(ls, seminfo); /* try to update decimal point separator */
+    trydecpoint(ls, &obj); /* try to update decimal point separator */
+  if (ttisinteger(&obj)) {
+    seminfo->i = ivalue(&obj);
+    return TK_INT;
+  }
+  else {
+    lua_assert(ttisfloat(&obj));
+    seminfo->r = fltvalue(&obj);
+    return TK_FLT;
+  }
 }
 
 
@@ -265,15 +297,19 @@ static int skip_sep (LexState *ls) {
 
 
 static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
+  int line = ls->linenumber;  /* initial line (for error message) */
   save_and_next(ls);  /* skip 2nd `[' */
   if (currIsNewline(ls))  /* string starts with a newline? */
     inclinenumber(ls);  /* skip it */
   for (;;) {
     switch (ls->current) {
-      case EOZ:
+      case EOZ: {  /* error */
-        lexerror(ls, (seminfo) ? "unfinished long string" :
+        const char *what = (seminfo ? "string" : "comment");
-                                 "unfinished long comment", TK_EOS);
+        const char *msg = luaO_pushfstring(ls->L,
+                     "unfinished long %s (starting at line %d)", what, line);
+        lexerror(ls, msg, TK_EOS);
         break;  /* to avoid warnings */
+      }
       case ']': {
         if (skip_sep(ls) == sep) {
           save_and_next(ls);  /* skip 2nd `]' */
@@ -299,40 +335,65 @@ static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
 }
 
 
-static void escerror (LexState *ls, int *c, int n, const char *msg) {
+static void esccheck (LexState *ls, int c, const char *msg) {
-  int i;
+  if (!c) {
-  luaZ_resetbuffer(ls->buff);  /* prepare error message */
+    if (ls->current != EOZ)
-  save(ls, '\\');
+      save_and_next(ls);  /* add current to buffer for error message */
-  for (i = 0; i < n && c[i] != EOZ; i++)
+    lexerror(ls, msg, TK_STRING);
-    save(ls, c[i]);
+  }
-  lexerror(ls, msg, TK_STRING);
+}
+
+
+static int gethexa (LexState *ls) {
+  save_and_next(ls);
+  esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected");
+  return luaO_hexavalue(ls->current);
 }
 
 
 static int readhexaesc (LexState *ls) {
-  int c[3], i;  /* keep input for error message */
+  int r = gethexa(ls);
-  int r = 0;  /* result accumulator */
+  r = (r << 4) + gethexa(ls);
-  c[0] = 'x';  /* for error message */
+  luaZ_buffremove(ls->buff, 2);  /* remove saved chars from buffer */
-  for (i = 1; i < 3; i++) {  /* read two hexadecimal digits */
-    c[i] = next(ls);
-    if (!lisxdigit(c[i]))
-      escerror(ls, c, i + 1, "hexadecimal digit expected");
-    r = (r << 4) + luaO_hexavalue(c[i]);
-  }
   return r;
 }
 
 
+static unsigned long readutf8esc (LexState *ls) {
+  unsigned long r;
+  int i = 4;  /* chars to be removed: '\', 'u', '{', and first digit */
+  save_and_next(ls);  /* skip 'u' */
+  esccheck(ls, ls->current == '{', "missing '{'");
+  r = gethexa(ls);  /* must have at least one digit */
+  while ((save_and_next(ls), lisxdigit(ls->current))) {
+    i++;
+    r = (r << 4) + luaO_hexavalue(ls->current);
+    esccheck(ls, r <= 0x10FFFF, "UTF-8 value too large");
+  }
+  esccheck(ls, ls->current == '}', "missing '}'");
+  next(ls);  /* skip '}' */
+  luaZ_buffremove(ls->buff, i);  /* remove saved chars from buffer */
+  return r;
+}
+
+
+static void utf8esc (LexState *ls) {
+  char buff[UTF8BUFFSZ];
+  int n = luaO_utf8esc(buff, readutf8esc(ls));
+  for (; n > 0; n--)  /* add 'buff' to string */
+    save(ls, buff[UTF8BUFFSZ - n]);
+}
+
+
 static int readdecesc (LexState *ls) {
-  int c[3], i;
+  int 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 + ls->current - '0';
-    r = 10*r + c[i] - '0';
+    save_and_next(ls);
-    next(ls);
   }
-  if (r > UCHAR_MAX)
+  esccheck(ls, r <= UCHAR_MAX, "decimal escape too large");
-    escerror(ls, c, i, "decimal escape too large");
+  luaZ_buffremove(ls->buff, i);  /* remove read digits from buffer */
   return r;
 }
 
@@ -350,7 +411,7 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
         break;  /* to avoid warnings */
       case '\\': {  /* escape sequences */
         int c;  /* final character to be saved */
-        next(ls);  /* do not save the `\' */
+        save_and_next(ls);  /* keep '\\' for error messages */
         switch (ls->current) {
           case 'a': c = '\a'; goto read_save;
           case 'b': c = '\b'; goto read_save;
@@ -360,12 +421,14 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
           case 't': c = '\t'; goto read_save;
           case 'v': c = '\v'; goto read_save;
           case 'x': c = readhexaesc(ls); goto read_save;
+          case 'u': utf8esc(ls);  goto no_save;
           case '\n': case '\r':
             inclinenumber(ls); c = '\n'; goto only_save;
           case '\\': case '\"': case '\'':
             c = ls->current; goto read_save;
           case EOZ: goto no_save;  /* will raise an error next loop */
           case 'z': {  /* zap following span of spaces */
+            luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
             next(ls);  /* skip the 'z' */
             while (lisspace(ls->current)) {
               if (currIsNewline(ls)) inclinenumber(ls);
@@ -374,15 +437,18 @@ static void read_string (LexState *ls, int del, SemInfo *seminfo) {
             goto no_save;
           }
           default: {
-            if (!lisdigit(ls->current))
+            esccheck(ls, lisdigit(ls->current), "invalid escape sequence");
-              escerror(ls, &ls->current, 1, "invalid escape sequence");
+            c = readdecesc(ls);  /* digital escape \ddd */
-            /* digital escape \ddd */
-            c = readdecesc(ls);
             goto only_save;
           }
         }
-       read_save: next(ls);  /* read next character */
+       read_save:
-       only_save: save(ls, c);  /* save 'c' */
+         next(ls);
+         /* go through */
+       only_save:
+         luaZ_buffremove(ls->buff, 1);  /* remove '\\' */
+         save(ls, c);
+         /* go through */
        no_save: break;
       }
       default:
@@ -437,28 +503,35 @@ static int llex (LexState *ls, SemInfo *seminfo) {
       }
       case '=': {
         next(ls);
-        if (ls->current != '=') return '=';
+        if (check_next1(ls, '=')) return TK_EQ;
-        else { next(ls); return TK_EQ; }
+        else return '=';
       }
       case '<': {
         next(ls);
-        if (ls->current != '=') return '<';
+        if (check_next1(ls, '=')) return TK_LE;
-        else { next(ls); return TK_LE; }
+        else if (check_next1(ls, '<')) return TK_SHL;
+        else return '<';
       }
       case '>': {
         next(ls);
-        if (ls->current != '=') return '>';
+        if (check_next1(ls, '=')) return TK_GE;
-        else { next(ls); return TK_GE; }
+        else if (check_next1(ls, '>')) return TK_SHR;
+        else return '>';
+      }
+      case '/': {
+        next(ls);
+        if (check_next1(ls, '/')) return TK_IDIV;
+        else return '/';
       }
       case '~': {
         next(ls);
-        if (ls->current != '=') return '~';
+        if (check_next1(ls, '=')) return TK_NE;
-        else { next(ls); return TK_NE; }
+        else return '~';
       }
       case ':': {
         next(ls);
-        if (ls->current != ':') return ':';
+        if (check_next1(ls, ':')) return TK_DBCOLON;
-        else { next(ls); return TK_DBCOLON; }
+        else return ':';
       }
       case '"': case '\'': {  /* short literal strings */
         read_string(ls, ls->current, seminfo);
@@ -466,18 +539,17 @@ static int llex (LexState *ls, SemInfo *seminfo) {
       }
       case '.': {  /* '.', '..', '...', or number */
         save_and_next(ls);
-        if (check_next(ls, ".")) {
+        if (check_next1(ls, '.')) {
-          if (check_next(ls, "."))
+          if (check_next1(ls, '.'))
             return TK_DOTS;   /* '...' */
           else return TK_CONCAT;   /* '..' */
         }
         else if (!lisdigit(ls->current)) return '.';
-        /* else go through */
+        else return read_numeral(ls, seminfo);
       }
       case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9': {
-        read_numeral(ls, seminfo);
+        return read_numeral(ls, seminfo);
-        return TK_NUMBER;
       }
       case EOZ: {
         return TK_EOS;
@@ -492,7 +564,7 @@ static int llex (LexState *ls, SemInfo *seminfo) {
                                   luaZ_bufflen(ls->buff));
           seminfo->ts = ts;
           if (isreserved(ts))  /* reserved word? */
-            return ts->tsv.extra - 1 + FIRST_RESERVED;
+            return ts->extra - 1 + FIRST_RESERVED;
           else {
             return TK_NAME;
           }

llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h,v 1.71 2011/06/20 16:52:48 roberto Exp roberto $
+** $Id: llex.h,v 1.75 2013/08/30 16:01:37 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -26,8 +26,10 @@ enum RESERVED {
   TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
   TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
   /* other terminal symbols */
-  TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
+  TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
-  TK_NUMBER, TK_NAME, TK_STRING
+  TK_SHL, TK_SHR,
+  TK_DBCOLON, TK_EOS,
+  TK_FLT, TK_INT, TK_NAME, TK_STRING
 };
 
 /* number of reserved words */
@@ -36,6 +38,7 @@ enum RESERVED {
 
 typedef union {
   lua_Number r;
+  lua_Integer i;
   TString *ts;
 } SemInfo;  /* semantics information */
 
@@ -58,6 +61,7 @@ typedef struct LexState {
   struct lua_State *L;
   ZIO *z;  /* input stream */
   Mbuffer *buff;  /* buffer for tokens */
+  Table *h;  /* to avoid collection/reuse strings */
   struct Dyndata *dyd;  /* dynamic structures used by the parser */
   TString *source;  /* current source name */
   TString *envn;  /* environment variable name */

llimits.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llimits.h,v 1.102 2013/01/29 16:00:40 roberto Exp roberto $
+** $Id: llimits.h,v 1.119 2014/07/18 18:18:45 roberto Exp roberto $
 ** Limits, basic types, and some other `installation-dependent' definitions
 ** See Copyright Notice in lua.h
 */
@@ -27,34 +27,43 @@ typedef LUAI_MEM l_mem;
 typedef unsigned char lu_byte;
 
 
-#define MAX_SIZET	((size_t)(~(size_t)0)-2)
+/* maximum value for size_t */
+#define MAX_SIZET	((size_t)(~(size_t)0))
 
-#define MAX_LUMEM	((lu_mem)(~(lu_mem)0)-2)
+/* maximum size visible for Lua (must be representable in a lua_Integer */
-
+#define MAX_SIZE	(sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
-#define MAX_LMEM	((l_mem) ((MAX_LUMEM >> 1) - 2))
+                          : (size_t)(LUA_MAXINTEGER))
 
 
-#define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
+#define MAX_LUMEM	((lu_mem)(~(lu_mem)0))
+
+#define MAX_LMEM	((l_mem)(MAX_LUMEM >> 1))
+
+
+#define MAX_INT		INT_MAX  /* maximum value of an int */
+
 
 /*
-** conversion of pointer to integer
+** conversion of pointer to integer:
 ** this is for hashing only; there is no problem if the integer
 ** cannot hold the whole pointer value
 */
-#define IntPoint(p)  ((unsigned int)(lu_mem)(p))
+#define point2int(p)	((unsigned int)((lu_mem)(p) & UINT_MAX))
 
 
 
 /* type to ensure maximum alignment */
-#if !defined(LUAI_USER_ALIGNMENT_T)
+#if defined(LUAI_USER_ALIGNMENT_T)
-#define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
+typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
+#else
+typedef union { double u; void *s; lua_Integer i; long l; } L_Umaxalign;
 #endif
 
-typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
 
 
-/* result of a `usual argument conversion' over lua_Number */
+/* types of 'usual argument conversions' for lua_Number and lua_Integer */
 typedef LUAI_UACNUMBER l_uacNumber;
+typedef LUAI_UACINT l_uacInt;
 
 
 /* internal assertions for in-house debugging */
@@ -71,18 +80,15 @@ typedef LUAI_UACNUMBER l_uacNumber;
 /*
 ** assertion for checking API calls
 */
-#if !defined(luai_apicheck)
-
 #if defined(LUA_USE_APICHECK)
 #include <assert.h>
-#define luai_apicheck(L,e)	assert(e)
+#define luai_apicheck(e)	assert(e)
 #else
-#define luai_apicheck(L,e)	lua_assert(e)
+#define luai_apicheck(e)	lua_assert(e)
 #endif
 
-#endif
 
-#define api_check(l,e,msg)	luai_apicheck(l,(e) && msg)
+#define api_check(e,msg)	luai_apicheck((e) && msg)
 
 
 #if !defined(UNUSED)
@@ -92,12 +98,28 @@ typedef LUAI_UACNUMBER l_uacNumber;
 
 #define cast(t, exp)	((t)(exp))
 
+#define cast_void(i)	cast(void, (i))
 #define cast_byte(i)	cast(lu_byte, (i))
 #define cast_num(i)	cast(lua_Number, (i))
 #define cast_int(i)	cast(int, (i))
 #define cast_uchar(i)	cast(unsigned char, (i))
 
 
+/* cast a signed lua_Integer to lua_Unsigned */
+#if !defined(l_castS2U)
+#define l_castS2U(i)	((lua_Unsigned)(i))
+#endif
+
+/*
+** cast a lua_Unsigned to a signed lua_Integer; this cast is
+** not strict ANSI C, but two-complement architectures should
+** work fine.
+*/
+#if !defined(l_castU2S)
+#define l_castU2S(i)	((lua_Integer)(i))
+#endif
+
+
 /*
 ** non-return type
 */
@@ -141,7 +163,7 @@ typedef lu_int32 Instruction;
 
 /* minimum size for the string table (must be power of 2) */
 #if !defined(MINSTRTABSIZE)
-#define MINSTRTABSIZE	32
+#define MINSTRTABSIZE	64	/* minimum size for "predefined" strings */
 #endif
 
 
@@ -190,103 +212,6 @@ typedef lu_int32 Instruction;
 #define luai_userstateyield(L,n)        ((void)L)
 #endif
 
-/*
-** lua_number2int is a macro to convert lua_Number to int.
-** lua_number2integer is a macro to convert lua_Number to lua_Integer.
-** lua_number2unsigned is a macro to convert a lua_Number to a lua_Unsigned.
-** lua_unsigned2number is a macro to convert a lua_Unsigned to a lua_Number.
-** luai_hashnum is a macro to hash a lua_Number value into an integer.
-** The hash must be deterministic and give reasonable values for
-** both small and large values (outside the range of integers).
-*/
-
-#if defined(MS_ASMTRICK) || defined(LUA_MSASMTRICK)	/* { */
-/* trick with Microsoft assembler for X86 */
-
-#define lua_number2int(i,n)  __asm {__asm fld n   __asm fistp i}
-#define lua_number2integer(i,n)		lua_number2int(i, n)
-#define lua_number2unsigned(i,n)  \
-  {__int64 l; __asm {__asm fld n   __asm fistp l} i = (unsigned int)l;}
-
-
-#elif defined(LUA_IEEE754TRICK)		/* }{ */
-/* the next trick should work on any machine using IEEE754 with
-   a 32-bit int type */
-
-union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
-
-#if !defined(LUA_IEEEENDIAN)	/* { */
-#define LUAI_EXTRAIEEE	\
-  static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
-#define LUA_IEEEENDIANLOC	(ieeeendian.l_p[1] == 33)
-#else
-#define LUA_IEEEENDIANLOC	LUA_IEEEENDIAN
-#define LUAI_EXTRAIEEE		/* empty */
-#endif				/* } */
-
-#define lua_number2int32(i,n,t) \
-  { LUAI_EXTRAIEEE \
-    volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
-    (i) = (t)u.l_p[LUA_IEEEENDIANLOC]; }
-
-#define luai_hashnum(i,n)  \
-  { volatile union luai_Cast u; u.l_d = (n) + 1.0;  /* avoid -0 */ \
-    (i) = u.l_p[0]; (i) += u.l_p[1]; }  /* add double bits for his hash */
-
-#define lua_number2int(i,n)		lua_number2int32(i, n, int)
-#define lua_number2unsigned(i,n)	lua_number2int32(i, n, lua_Unsigned)
-
-/* the trick can be expanded to lua_Integer when it is a 32-bit value */
-#if defined(LUA_IEEELL)
-#define lua_number2integer(i,n)		lua_number2int32(i, n, lua_Integer)
-#endif
-
-#endif				/* } */
-
-
-/* the following definitions always work, but may be slow */
-
-#if !defined(lua_number2int)
-#define lua_number2int(i,n)	((i)=(int)(n))
-#endif
-
-#if !defined(lua_number2integer)
-#define lua_number2integer(i,n)	((i)=(lua_Integer)(n))
-#endif
-
-#if !defined(lua_number2unsigned)	/* { */
-/* the following definition assures proper modulo behavior */
-#if defined(LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_FLOAT)
-#include <math.h>
-#define SUPUNSIGNED	((lua_Number)(~(lua_Unsigned)0) + 1)
-#define lua_number2unsigned(i,n)  \
-	((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
-#else
-#define lua_number2unsigned(i,n)	((i)=(lua_Unsigned)(n))
-#endif
-#endif				/* } */
-
-
-#if !defined(lua_unsigned2number)
-/* on several machines, coercion from unsigned to double is slow,
-   so it may be worth to avoid */
-#define lua_unsigned2number(u)  \
-    (((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u))
-#endif
-
-
-
-#if defined(ltable_c) && !defined(luai_hashnum)
-
-#include <float.h>
-#include <math.h>
-
-#define luai_hashnum(i,n) { int e;  \
-  n = l_mathop(frexp)(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP);  \
-  lua_number2int(i, n); i += e; }
-
-#endif
-
 
 
 /*

lmathlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.82 2013/01/29 16:00:40 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.109 2014/10/01 11:54:56 roberto Exp $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -18,13 +18,28 @@
 
 
 #undef PI
-#define PI	((lua_Number)(3.1415926535897932384626433832795))
+#define PI	(l_mathop(3.141592653589793238462643383279502884))
-#define RADIANS_PER_DEGREE	((lua_Number)(PI/180.0))
 
 
+#if !defined(l_rand)		/* { */
+#if defined(LUA_USE_POSIX)
+#define l_rand()	random()
+#define l_srand(x)	srandom(x)
+#else
+#define l_rand()	rand()
+#define l_srand(x)	srand(x)
+#endif
+#endif				/* } */
+
 
 static int math_abs (lua_State *L) {
-  lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
+  if (lua_isinteger(L, 1)) {
+    lua_Integer n = lua_tointeger(L, 1);
+    if (n < 0) n = (lua_Integer)(0u - n);
+    lua_pushinteger(L, n);
+  }
+  else
+    lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
   return 1;
 }
 
@@ -33,31 +48,16 @@ static int math_sin (lua_State *L) {
   return 1;
 }
 
-static int math_sinh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
 static int math_cos (lua_State *L) {
   lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
   return 1;
 }
 
-static int math_cosh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
 static int math_tan (lua_State *L) {
   lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
   return 1;
 }
 
-static int math_tanh (lua_State *L) {
-  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
-  return 1;
-}
-
 static int math_asin (lua_State *L) {
   lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
   return 1;
@@ -69,49 +69,106 @@ static int math_acos (lua_State *L) {
 }
 
 static int math_atan (lua_State *L) {
-  lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1)));
+  lua_Number y = luaL_checknumber(L, 1);
+  lua_Number x = luaL_optnumber(L, 2, 1);
+  lua_pushnumber(L, l_mathop(atan2)(y, x));
   return 1;
 }
 
-static int math_atan2 (lua_State *L) {
+
-  lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1),
+static int math_toint (lua_State *L) {
-                                luaL_checknumber(L, 2)));
+  int valid;
+  lua_Integer n = lua_tointegerx(L, 1, &valid);
+  if (valid)
+    lua_pushinteger(L, n);
+  else {
+    luaL_checkany(L, 1);
+    lua_pushnil(L);  /* value is not convertible to integer */
+  }
   return 1;
 }
 
-static int math_ceil (lua_State *L) {
+
-  lua_pushnumber(L, l_mathop(ceil)(luaL_checknumber(L, 1)));
+static void pushnumint (lua_State *L, lua_Number d) {
-  return 1;
+  lua_Integer n;
+  if (lua_numtointeger(d, &n))  /* does 'd' fit in an integer? */
+    lua_pushinteger(L, n);  /* result is integer */
+  else
+    lua_pushnumber(L, d);  /* result is float */
 }
 
+
 static int math_floor (lua_State *L) {
-  lua_pushnumber(L, l_mathop(floor)(luaL_checknumber(L, 1)));
+  if (lua_isinteger(L, 1))
+    lua_settop(L, 1);  /* integer is its own floor */
+  else {
+    lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
+    pushnumint(L, d);
+  }
   return 1;
 }
 
+
+static int math_ceil (lua_State *L) {
+  if (lua_isinteger(L, 1))
+    lua_settop(L, 1);  /* integer is its own ceil */
+  else {
+    lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
+    pushnumint(L, d);
+  }
+  return 1;
+}
+
+
 static int math_fmod (lua_State *L) {
-  lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
+  if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
-                               luaL_checknumber(L, 2)));
+    lua_Integer d = lua_tointeger(L, 2);
+    if ((lua_Unsigned)d + 1u <= 1u) {  /* special cases: -1 or 0 */
+      luaL_argcheck(L, d != 0, 2, "zero");
+      lua_pushinteger(L, 0);  /* avoid overflow with 0x80000... / -1 */
+    }
+    else
+      lua_pushinteger(L, lua_tointeger(L, 1) % d);
+  }
+  else
+    lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
+                                     luaL_checknumber(L, 2)));
   return 1;
 }
 
+
+/*
+** next function does not use 'modf', avoiding problems with 'double*'
+** (which is not compatible with 'float*') when lua_Number is not
+** 'double'.
+*/
 static int math_modf (lua_State *L) {
-  lua_Number ip;
+  if (lua_isinteger(L ,1)) {
-  lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip);
+    lua_settop(L, 1);  /* number is its own integer part */
-  lua_pushnumber(L, ip);
+    lua_pushnumber(L, 0);  /* no fractional part */
-  lua_pushnumber(L, fp);
+  }
+  else {
+    lua_Number n = luaL_checknumber(L, 1);
+    /* integer part (rounds toward zero) */
+    lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
+    pushnumint(L, ip);
+    /* fractional part (test needed for inf/-inf) */
+    lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
+  }
   return 2;
 }
 
+
 static int math_sqrt (lua_State *L) {
   lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
   return 1;
 }
 
-static int math_pow (lua_State *L) {
+
-  lua_Number x = luaL_checknumber(L, 1);
+static int math_ult (lua_State *L) {
-  lua_Number y = luaL_checknumber(L, 2);
+  lua_Integer a = luaL_checkinteger(L, 1);
-  lua_pushnumber(L, l_mathop(pow)(x, y));
+  lua_Integer b = luaL_checkinteger(L, 2);
+  lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
   return 1;
 }
 
@@ -122,32 +179,139 @@ static int math_log (lua_State *L) {
     res = l_mathop(log)(x);
   else {
     lua_Number base = luaL_checknumber(L, 2);
-    if (base == (lua_Number)10.0) res = l_mathop(log10)(x);
+    if (base == 10.0) res = l_mathop(log10)(x);
     else res = l_mathop(log)(x)/l_mathop(log)(base);
   }
   lua_pushnumber(L, res);
   return 1;
 }
 
-#if defined(LUA_COMPAT_LOG10)
-static int math_log10 (lua_State *L) {
-  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
-  return 1;
-}
-#endif
-
 static int math_exp (lua_State *L) {
   lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
   return 1;
 }
 
 static int math_deg (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
+  lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
   return 1;
 }
 
 static int math_rad (lua_State *L) {
-  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
+  lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
+  return 1;
+}
+
+
+static int math_min (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int imin = 1;  /* index of current minimum value */
+  int i;
+  luaL_argcheck(L, n >= 1, 1, "value expected");
+  for (i = 2; i <= n; i++) {
+    if (lua_compare(L, i, imin, LUA_OPLT))
+      imin = i;
+  }
+  lua_pushvalue(L, imin);
+  return 1;
+}
+
+
+static int math_max (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int imax = 1;  /* index of current maximum value */
+  int i;
+  luaL_argcheck(L, n >= 1, 1, "value expected");
+  for (i = 2; i <= n; i++) {
+    if (lua_compare(L, imax, i, LUA_OPLT))
+      imax = i;
+  }
+  lua_pushvalue(L, imax);
+  return 1;
+}
+
+/*
+** This function uses 'double' (instead of 'lua_Number') to ensure that
+** all bits from 'l_rand' can be represented, and that 'RAND_MAX + 1.0'
+** will keep full precision (ensuring that 'r' is always less than 1.0.)
+*/
+static int math_random (lua_State *L) {
+  lua_Integer low, up;
+  double r = (double)l_rand() * (1.0 / ((double)RAND_MAX + 1.0));
+  switch (lua_gettop(L)) {  /* check number of arguments */
+    case 0: {  /* no arguments */
+      lua_pushnumber(L, (lua_Number)r);  /* Number between 0 and 1 */
+      return 1;
+    }
+    case 1: {  /* only upper limit */
+      low = 1;
+      up = luaL_checkinteger(L, 1);
+      break;
+    }
+    case 2: {  /* lower and upper limits */
+      low = luaL_checkinteger(L, 1);
+      up = luaL_checkinteger(L, 2);
+      break;
+    }
+    default: return luaL_error(L, "wrong number of arguments");
+  }
+  /* random integer in the interval [low, up] */
+  luaL_argcheck(L, low <= up, 1, "interval is empty"); 
+  luaL_argcheck(L, (lua_Unsigned)up - low <= (lua_Unsigned)LUA_MAXINTEGER,
+                   1, "interval too large");
+  r *= (double)(up - low) + 1.0;
+  lua_pushinteger(L, (lua_Integer)r + low);
+  return 1;
+}
+
+
+static int math_randomseed (lua_State *L) {
+  l_srand((unsigned int)(lua_Integer)luaL_checknumber(L, 1));
+  (void)rand(); /* discard first value to avoid undesirable correlations */
+  return 0;
+}
+
+
+static int math_type (lua_State *L) {
+  if (lua_type(L, 1) == LUA_TNUMBER) {
+      if (lua_isinteger(L, 1))
+        lua_pushliteral(L, "integer"); 
+      else
+        lua_pushliteral(L, "float"); 
+  }
+  else {
+    luaL_checkany(L, 1);
+    lua_pushnil(L);
+  }
+  return 1;
+}
+
+
+/*
+** {==================================================================
+** Deprecated functions (for compatibility only)
+** ===================================================================
+*/
+#if defined(LUA_COMPAT_MATHLIB)
+
+static int math_cosh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sinh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_tanh (lua_State *L) {
+  lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_pow (lua_State *L) {
+  lua_Number x = luaL_checknumber(L, 1);
+  lua_Number y = luaL_checknumber(L, 2);
+  lua_pushnumber(L, l_mathop(pow)(x, y));
   return 1;
 }
 
@@ -160,107 +324,60 @@ static int math_frexp (lua_State *L) {
 
 static int math_ldexp (lua_State *L) {
   lua_Number x = luaL_checknumber(L, 1);
-  int ep = luaL_checkint(L, 2);
+  int ep = (int)luaL_checkinteger(L, 2);
   lua_pushnumber(L, l_mathop(ldexp)(x, ep));
   return 1;
 }
 
-
+static int math_log10 (lua_State *L) {
-
+  lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
-static int math_min (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  lua_Number dmin = luaL_checknumber(L, 1);
-  int i;
-  for (i=2; i<=n; i++) {
-    lua_Number d = luaL_checknumber(L, i);
-    if (d < dmin)
-      dmin = d;
-  }
-  lua_pushnumber(L, dmin);
   return 1;
 }
 
+#endif
+/* }================================================================== */
 
-static int math_max (lua_State *L) {
-  int n = lua_gettop(L);  /* number of arguments */
-  lua_Number dmax = luaL_checknumber(L, 1);
-  int i;
-  for (i=2; i<=n; i++) {
-    lua_Number d = luaL_checknumber(L, i);
-    if (d > dmax)
-      dmax = d;
-  }
-  lua_pushnumber(L, dmax);
-  return 1;
-}
-
-
-static int math_random (lua_State *L) {
-  /* the `%' avoids the (rare) case of r==1, and is needed also because on
-     some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
-  lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
-  switch (lua_gettop(L)) {  /* check number of arguments */
-    case 0: {  /* no arguments */
-      lua_pushnumber(L, r);  /* Number between 0 and 1 */
-      break;
-    }
-    case 1: {  /* only upper limit */
-      lua_Number u = luaL_checknumber(L, 1);
-      luaL_argcheck(L, (lua_Number)1.0 <= u, 1, "interval is empty");
-      lua_pushnumber(L, l_mathop(floor)(r*u) + (lua_Number)(1.0));  /* [1, u] */
-      break;
-    }
-    case 2: {  /* lower and upper limits */
-      lua_Number l = luaL_checknumber(L, 1);
-      lua_Number u = luaL_checknumber(L, 2);
-      luaL_argcheck(L, l <= u, 2, "interval is empty");
-      lua_pushnumber(L, l_mathop(floor)(r*(u-l+1)) + l);  /* [l, u] */
-      break;
-    }
-    default: return luaL_error(L, "wrong number of arguments");
-  }
-  return 1;
-}
-
-
-static int math_randomseed (lua_State *L) {
-  srand(luaL_checkunsigned(L, 1));
-  (void)rand(); /* discard first value to avoid undesirable correlations */
-  return 0;
-}
 
 
 static const luaL_Reg mathlib[] = {
   {"abs",   math_abs},
   {"acos",  math_acos},
   {"asin",  math_asin},
-  {"atan2", math_atan2},
   {"atan",  math_atan},
   {"ceil",  math_ceil},
-  {"cosh",   math_cosh},
   {"cos",   math_cos},
   {"deg",   math_deg},
   {"exp",   math_exp},
+  {"tointeger", math_toint},
   {"floor", math_floor},
   {"fmod",   math_fmod},
-  {"frexp", math_frexp},
+  {"ult",   math_ult},
-  {"ldexp", math_ldexp},
-#if defined(LUA_COMPAT_LOG10)
-  {"log10", math_log10},
-#endif
   {"log",   math_log},
   {"max",   math_max},
   {"min",   math_min},
   {"modf",   math_modf},
-  {"pow",   math_pow},
   {"rad",   math_rad},
   {"random",     math_random},
   {"randomseed", math_randomseed},
-  {"sinh",   math_sinh},
   {"sin",   math_sin},
   {"sqrt",  math_sqrt},
-  {"tanh",   math_tanh},
   {"tan",   math_tan},
+  {"type", math_type},
+#if defined(LUA_COMPAT_MATHLIB)
+  {"atan2", math_atan},
+  {"cosh",   math_cosh},
+  {"sinh",   math_sinh},
+  {"tanh",   math_tanh},
+  {"pow",   math_pow},
+  {"frexp", math_frexp},
+  {"ldexp", math_ldexp},
+  {"log10", math_log10},
+#endif
+  /* placeholders */
+  {"pi", NULL},
+  {"huge", NULL},
+  {"maxinteger", NULL},
+  {"mininteger", NULL},
   {NULL, NULL}
 };
 
@@ -272,8 +389,12 @@ LUAMOD_API int luaopen_math (lua_State *L) {
   luaL_newlib(L, mathlib);
   lua_pushnumber(L, PI);
   lua_setfield(L, -2, "pi");
-  lua_pushnumber(L, HUGE_VAL);
+  lua_pushnumber(L, (lua_Number)HUGE_VAL);
   lua_setfield(L, -2, "huge");
+  lua_pushinteger(L, LUA_MAXINTEGER);
+  lua_setfield(L, -2, "maxinteger");
+  lua_pushinteger(L, LUA_MININTEGER);
+  lua_setfield(L, -2, "mininteger");
   return 1;
 }
 

lmem.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.c,v 1.83 2011/11/30 12:42:49 roberto Exp roberto $
+** $Id: lmem.c,v 1.85 2014/06/26 18:29:05 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -83,12 +83,10 @@ void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
 #endif
   newblock = (*g->frealloc)(g->ud, block, osize, nsize);
   if (newblock == NULL && nsize > 0) {
-    api_check(L, nsize > realosize,
+    api_check( nsize > realosize,
                  "realloc cannot fail when shrinking a block");
-    if (g->gcrunning) {
+    luaC_fullgc(L, 1);  /* try to free some memory... */
-      luaC_fullgc(L, 1);  /* try to free some memory... */
+    newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
-      newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
-    }
     if (newblock == NULL)
       luaD_throw(L, LUA_ERRMEM);
   }

lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h,v 1.39 2012/11/14 17:21:34 roberto Exp roberto $
+** $Id: lmem.h,v 1.40 2013/02/20 14:08:21 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -15,20 +15,26 @@
 
 
 /*
-** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
+** This macro reallocs a vector 'b' from 'on' to 'n' elements, where
-** always constant.
+** each element has size 'e'. In case of arithmetic overflow of the
-** The macro is somewhat complex to avoid warnings:
+** product 'n'*'e', it raises an error (calling 'luaM_toobig'). Because
-** +1 avoids warnings of "comparison has constant result";
+** 'e' is always constant, it avoids the runtime division MAX_SIZET/(e).
-** cast to 'void' avoids warnings of "value unused".
+**
+** (The macro is somewhat complex to avoid warnings:  The 'sizeof'
+** comparison avoids a runtime comparison when overflow cannot occur.
+** The compiler should be able to optimize the real test by itself, but
+** when it does it, it may give a warning about "comparison is always
+** false due to limited range of data type"; the +1 tricks the compiler,
+** avoiding this warning but also this optimization.)
 */
 #define luaM_reallocv(L,b,on,n,e) \
-  (cast(void, \
+  (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \
-     (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \
+      ? luaM_toobig(L) : cast_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)
-#define luaM_freearray(L, b, n)   luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
+#define luaM_freearray(L, b, n)   luaM_realloc_(L, (b), (n)*sizeof(*(b)), 0)
 
 #define luaM_malloc(L,s)	luaM_realloc_(L, NULL, 0, (s))
 #define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))

loadlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loadlib.c,v 1.110 2012/04/26 19:38:52 roberto Exp roberto $
+** $Id: loadlib.c,v 1.116 2014/07/29 16:01:00 roberto Exp roberto $
 ** Dynamic library loader for Lua
 ** See Copyright Notice in lua.h
 **
@@ -31,21 +31,21 @@
 
 
 /*
-** LUA_PATH and LUA_CPATH are the names of the environment
+** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
 ** variables that Lua check to set its paths.
 */
-#if !defined(LUA_PATH)
+#if !defined(LUA_PATH_VAR)
-#define LUA_PATH	"LUA_PATH"
+#define LUA_PATH_VAR	"LUA_PATH"
 #endif
 
-#if !defined(LUA_CPATH)
+#if !defined(LUA_CPATH_VAR)
-#define LUA_CPATH	"LUA_CPATH"
+#define LUA_CPATH_VAR	"LUA_CPATH"
 #endif
 
 #define LUA_PATHSUFFIX		"_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
 
-#define LUA_PATHVERSION		LUA_PATH LUA_PATHSUFFIX
+#define LUA_PATHVARVERSION		LUA_PATH_VAR LUA_PATHSUFFIX
-#define LUA_CPATHVERSION	LUA_CPATH LUA_PATHSUFFIX
+#define LUA_CPATHVARVERSION		LUA_CPATH_VAR LUA_PATHSUFFIX
 
 /*
 ** LUA_PATH_SEP is the character that separates templates in a path.
@@ -97,20 +97,33 @@
 
 #define LIB_FAIL	"open"
 
-
-/* error codes for ll_loadfunc */
-#define ERRLIB		1
-#define ERRFUNC		2
-
 #define setprogdir(L)		((void)0)
 
 
 /*
 ** system-dependent functions
 */
-static void ll_unloadlib (void *lib);
+
-static void *ll_load (lua_State *L, const char *path, int seeglb);
+/*
-static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
+** unload library 'lib'
+*/
+static void lsys_unloadlib (void *lib);
+
+/*
+** load C library in file 'path'. If 'seeglb', load with all names in
+** the library global.
+** Returns the library; in case of error, returns NULL plus an
+** error string in the stack.
+*/
+static void *lsys_load (lua_State *L, const char *path, int seeglb);
+
+/*
+** Try to find a function named 'sym' in library 'lib'.
+** Returns the function; in case of error, returns NULL plus an
+** error string in the stack.
+*/
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
+
 
 
 
@@ -126,19 +139,19 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
 
 #include <dlfcn.h>
 
-static void ll_unloadlib (void *lib) {
+static void lsys_unloadlib (void *lib) {
   dlclose(lib);
 }
 
 
-static void *ll_load (lua_State *L, const char *path, int seeglb) {
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
   void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
   if (lib == NULL) lua_pushstring(L, dlerror());
   return lib;
 }
 
 
-static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
   lua_CFunction f = (lua_CFunction)dlsym(lib, sym);
   if (f == NULL) lua_pushstring(L, dlerror());
   return f;
@@ -190,12 +203,12 @@ static void pusherror (lua_State *L) {
     lua_pushfstring(L, "system error %d\n", error);
 }
 
-static void ll_unloadlib (void *lib) {
+static void lsys_unloadlib (void *lib) {
   FreeLibrary((HMODULE)lib);
 }
 
 
-static void *ll_load (lua_State *L, const char *path, int seeglb) {
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
   HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
   (void)(seeglb);  /* not used: symbols are 'global' by default */
   if (lib == NULL) pusherror(L);
@@ -203,7 +216,7 @@ static void *ll_load (lua_State *L, const char *path, int seeglb) {
 }
 
 
-static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
   lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
   if (f == NULL) pusherror(L);
   return f;
@@ -226,19 +239,19 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
 #define DLMSG	"dynamic libraries not enabled; check your Lua installation"
 
 
-static void ll_unloadlib (void *lib) {
+static void lsys_unloadlib (void *lib) {
   (void)(lib);  /* not used */
 }
 
 
-static void *ll_load (lua_State *L, const char *path, int seeglb) {
+static void *lsys_load (lua_State *L, const char *path, int seeglb) {
   (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) {
+static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
   (void)(lib); (void)(sym);  /* not used */
   lua_pushliteral(L, DLMSG);
   return NULL;
@@ -248,7 +261,10 @@ static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
 #endif
 
 
-static void *ll_checkclib (lua_State *L, const char *path) {
+/*
+** return registry.CLIBS[path]
+*/
+static void *checkclib (lua_State *L, const char *path) {
   void *plib;
   lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
   lua_getfield(L, -1, path);
@@ -258,7 +274,11 @@ static void *ll_checkclib (lua_State *L, const char *path) {
 }
 
 
-static void ll_addtoclib (lua_State *L, const char *path, void *plib) {
+/*
+** registry.CLIBS[path] = plib        -- for queries
+** registry.CLIBS[#CLIBS + 1] = plib  -- also keep a list of all libraries
+*/
+static void addtoclib (lua_State *L, const char *path, void *plib) {
   lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
   lua_pushlightuserdata(L, plib);
   lua_pushvalue(L, -1);
@@ -269,33 +289,49 @@ static void ll_addtoclib (lua_State *L, const char *path, void *plib) {
 
 
 /*
-** __gc tag method for CLIBS table: calls 'll_unloadlib' for all lib
+** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
 ** handles in list CLIBS
 */
 static int gctm (lua_State *L) {
-  int n = luaL_len(L, 1);
+  lua_Integer n = luaL_len(L, 1);
   for (; n >= 1; n--) {  /* for each handle, in reverse order */
     lua_rawgeti(L, 1, n);  /* get handle CLIBS[n] */
-    ll_unloadlib(lua_touserdata(L, -1));
+    lsys_unloadlib(lua_touserdata(L, -1));
     lua_pop(L, 1);  /* pop handle */
   }
   return 0;
 }
 
 
-static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
+
-  void *reg = ll_checkclib(L, path);  /* check loaded C libraries */
+/* error codes for 'lookforfunc' */
+#define ERRLIB		1
+#define ERRFUNC		2
+
+/*
+** Look for a C function named 'sym' in a dynamically loaded library
+** 'path'.
+** First, check whether the library is already loaded; if not, try
+** to load it.
+** Then, if 'sym' is '*', return true (as library has been loaded).
+** Otherwise, look for symbol 'sym' in the library and push a
+** C function with that symbol.
+** Return 0 and 'true' or a function in the stack; in case of
+** errors, return an error code and an error message in the stack.
+*/
+static int lookforfunc (lua_State *L, const char *path, const char *sym) {
+  void *reg = checkclib(L, path);  /* check loaded C libraries */
   if (reg == NULL) {  /* must load library? */
-    reg = ll_load(L, path, *sym == '*');
+    reg = lsys_load(L, path, *sym == '*');  /* global symbols if 'sym'=='*' */
     if (reg == NULL) return ERRLIB;  /* unable to load library */
-    ll_addtoclib(L, path, reg);
+    addtoclib(L, path, reg);
   }
   if (*sym == '*') {  /* loading only library (no function)? */
     lua_pushboolean(L, 1);  /* return 'true' */
     return 0;  /* no errors */
   }
   else {
-    lua_CFunction f = ll_sym(L, reg, sym);
+    lua_CFunction f = lsys_sym(L, reg, sym);
     if (f == NULL)
       return ERRFUNC;  /* unable to find function */
     lua_pushcfunction(L, f);  /* else create new function */
@@ -307,7 +343,7 @@ static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
 static int ll_loadlib (lua_State *L) {
   const char *path = luaL_checkstring(L, 1);
   const char *init = luaL_checkstring(L, 2);
-  int stat = ll_loadfunc(L, path, init);
+  int stat = lookforfunc(L, path, init);
   if (stat == 0)  /* no errors? */
     return 1;  /* return the loaded function */
   else {  /* error; error message is on stack top */
@@ -360,7 +396,7 @@ static const char *searchpath (lua_State *L, const char *name,
     lua_remove(L, -2);  /* remove path template */
     if (readable(filename))  /* does file exist and is readable? */
       return filename;  /* return that file name */
-    lua_pushfstring(L, "\n\tno file " LUA_QS, filename);
+    lua_pushfstring(L, "\n\tno file '%s'", filename);
     lua_remove(L, -2);  /* remove file name */
     luaL_addvalue(&msg);  /* concatenate error msg. entry */
   }
@@ -390,7 +426,7 @@ static const char *findfile (lua_State *L, const char *name,
   lua_getfield(L, lua_upvalueindex(1), pname);
   path = lua_tostring(L, -1);
   if (path == NULL)
-    luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
+    luaL_error(L, "'package.%s' must be a string", pname);
   return searchpath(L, name, path, ".", dirsep);
 }
 
@@ -401,8 +437,7 @@ static int checkload (lua_State *L, int stat, const char *filename) {
     return 2;  /* return open function and file name */
   }
   else
-    return luaL_error(L, "error loading module " LUA_QS
+    return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
-                         " from file " LUA_QS ":\n\t%s",
                           lua_tostring(L, 1), filename, lua_tostring(L, -1));
 }
 
@@ -416,21 +451,29 @@ static int searcher_Lua (lua_State *L) {
 }
 
 
+/*
+** Try to find a load function for module 'modname' at file 'filename'.
+** First, change '.' to '_' in 'modname'; then, if 'modname' has
+** the form X-Y (that is, it has an "ignore mark"), build a function
+** name "luaopen_X" and look for it. (For compatibility, if that
+** fails, it also tries "luaopen_Y".) If there is no ignore mark,
+** look for a function named "luaopen_modname".
+*/
 static int loadfunc (lua_State *L, const char *filename, const char *modname) {
-  const char *funcname;
+  const char *openfunc;
   const char *mark;
   modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
   mark = strchr(modname, *LUA_IGMARK);
   if (mark) {
     int stat;
-    funcname = lua_pushlstring(L, modname, mark - modname);
+    openfunc = lua_pushlstring(L, modname, mark - modname);
-    funcname = lua_pushfstring(L, LUA_POF"%s", funcname);
+    openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
-    stat = ll_loadfunc(L, filename, funcname);
+    stat = lookforfunc(L, filename, openfunc);
     if (stat != ERRFUNC) return stat;
     modname = mark + 1;  /* else go ahead and try old-style name */
   }
-  funcname = lua_pushfstring(L, LUA_POF"%s", modname);
+  openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
-  return ll_loadfunc(L, filename, funcname);
+  return lookforfunc(L, filename, openfunc);
 }
 
 
@@ -455,8 +498,7 @@ static int searcher_Croot (lua_State *L) {
     if (stat != ERRFUNC)
       return checkload(L, 0, filename);  /* real error */
     else {  /* open function not found */
-      lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
+      lua_pushfstring(L, "\n\tno module '%s' in file '%s'", name, filename);
-                         name, filename);
       return 1;
     }
   }
@@ -468,8 +510,7 @@ static int searcher_Croot (lua_State *L) {
 static int searcher_preload (lua_State *L) {
   const char *name = luaL_checkstring(L, 1);
   lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
-  lua_getfield(L, -1, name);
+  if (lua_getfield(L, -1, name) == LUA_TNIL)  /* not found? */
-  if (lua_isnil(L, -1))  /* not found? */
     lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
   return 1;
 }
@@ -481,15 +522,13 @@ static void findloader (lua_State *L, const char *name) {
   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");
+    luaL_error(L, "'package.searchers' must be a table");
   /*  iterate over available searchers to find a loader */
   for (i = 1; ; i++) {
-    lua_rawgeti(L, 3, i);  /* get a searcher */
+    if (lua_rawgeti(L, 3, i) == LUA_TNIL) {  /* no more searchers? */
-    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",
+      luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
-                    name, lua_tostring(L, -1));
     }
     lua_pushstring(L, name);
     lua_call(L, 1, 2);  /* call it */
@@ -520,8 +559,7 @@ static int ll_require (lua_State *L) {
   lua_call(L, 2, 1);  /* run loader to load module */
   if (!lua_isnil(L, -1))  /* non-nil return? */
     lua_setfield(L, 2, name);  /* _LOADED[name] = returned value */
-  lua_getfield(L, 2, name);
+  if (lua_getfield(L, 2, name) == LUA_TNIL) {   /* module set no value? */
-  if (lua_isnil(L, -1)) {   /* module did not set a value? */
     lua_pushboolean(L, 1);  /* use true as result */
     lua_pushvalue(L, -1);  /* extra copy to be returned */
     lua_setfield(L, 2, name);  /* _LOADED[name] = true */
@@ -548,7 +586,7 @@ static void set_env (lua_State *L) {
   if (lua_getstack(L, 1, &ar) == 0 ||
       lua_getinfo(L, "f", &ar) == 0 ||  /* get calling function */
       lua_iscfunction(L, -1))
-    luaL_error(L, LUA_QL("module") " not called from a Lua function");
+    luaL_error(L, "'module' not called from a Lua function");
   lua_pushvalue(L, -2);  /* copy new environment table to top */
   lua_setupvalue(L, -2, 1);
   lua_pop(L, 1);  /* remove function */
@@ -587,9 +625,8 @@ static int ll_module (lua_State *L) {
   int lastarg = lua_gettop(L);  /* last parameter */
   luaL_pushmodule(L, modname, 1);  /* get/create module table */
   /* check whether table already has a _NAME field */
-  lua_getfield(L, -1, "_NAME");
+  if (lua_getfield(L, -1, "_NAME") != LUA_TNIL)
-  if (!lua_isnil(L, -1))  /* is table an initialized module? */
+    lua_pop(L, 1);  /* table is an initialized module */
-    lua_pop(L, 1);
   else {  /* no; initialize it */
     lua_pop(L, 1);
     modinit(L, modname);
@@ -659,6 +696,12 @@ static const luaL_Reg pk_funcs[] = {
 #if defined(LUA_COMPAT_MODULE)
   {"seeall", ll_seeall},
 #endif
+  /* placeholders */
+  {"preload", NULL},
+  {"cpath", NULL},
+  {"path", NULL},
+  {"searchers", NULL},
+  {"loaded", NULL},
   {NULL, NULL}
 };
 
@@ -684,28 +727,35 @@ static void createsearcherstable (lua_State *L) {
     lua_pushcclosure(L, searchers[i], 1);
     lua_rawseti(L, -2, i+1);
   }
-}
-
-
-LUAMOD_API int luaopen_package (lua_State *L) {
-  /* create table CLIBS to keep track of loaded C libraries */
-  luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);
-  lua_createtable(L, 0, 1);  /* metatable for CLIBS */
-  lua_pushcfunction(L, gctm);
-  lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
-  lua_setmetatable(L, -2);
-  /* create `package' table */
-  luaL_newlib(L, pk_funcs);
-  createsearcherstable(L);
 #if defined(LUA_COMPAT_LOADERS)
   lua_pushvalue(L, -1);  /* make a copy of 'searchers' table */
   lua_setfield(L, -3, "loaders");  /* put it in field `loaders' */
 #endif
   lua_setfield(L, -2, "searchers");  /* put it in field 'searchers' */
+}
+
+
+/*
+** create table CLIBS to keep track of loaded C libraries,
+** setting a finalizer to close all libraries when closing state.
+*/
+static void createclibstable (lua_State *L) {
+  luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);  /* create CLIBS table */
+  lua_createtable(L, 0, 1);  /* create metatable for CLIBS */
+  lua_pushcfunction(L, gctm);
+  lua_setfield(L, -2, "__gc");  /* set finalizer for CLIBS table */
+  lua_setmetatable(L, -2);
+}
+
+
+LUAMOD_API int luaopen_package (lua_State *L) {
+  createclibstable(L);
+  luaL_newlib(L, pk_funcs);  /* create `package' table */
+  createsearcherstable(L);
   /* set field 'path' */
-  setpath(L, "path", LUA_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT);
+  setpath(L, "path", LUA_PATHVARVERSION, LUA_PATH_VAR, LUA_PATH_DEFAULT);
   /* set field 'cpath' */
-  setpath(L, "cpath", LUA_CPATHVERSION, LUA_CPATH, LUA_CPATH_DEFAULT);
+  setpath(L, "cpath", LUA_CPATHVARVERSION, LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
   /* store config information */
   lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
                      LUA_EXEC_DIR "\n" LUA_IGMARK "\n");

lobject.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 2.57 2013/01/29 16:00:40 roberto Exp roberto $
+** $Id: lobject.c,v 2.92 2014/10/10 22:23:04 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -70,31 +70,91 @@ int luaO_ceillog2 (unsigned int x) {
 }
 
 
-lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) {
+static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
+                                                   lua_Integer v2) {
   switch (op) {
-    case LUA_OPADD: return luai_numadd(NULL, v1, v2);
+    case LUA_OPADD: return intop(+, v1, v2);
-    case LUA_OPSUB: return luai_numsub(NULL, v1, v2);
+    case LUA_OPSUB:return intop(-, v1, v2);
-    case LUA_OPMUL: return luai_nummul(NULL, v1, v2);
+    case LUA_OPMUL:return intop(*, v1, v2);
-    case LUA_OPDIV: return luai_numdiv(NULL, v1, v2);
+    case LUA_OPMOD: return luaV_mod(L, v1, v2);
-    case LUA_OPMOD: return luai_nummod(NULL, v1, v2);
+    case LUA_OPIDIV: return luaV_div(L, v1, v2);
-    case LUA_OPPOW: return luai_numpow(NULL, v1, v2);
+    case LUA_OPBAND: return intop(&, v1, v2);
-    case LUA_OPUNM: return luai_numunm(NULL, v1);
+    case LUA_OPBOR: return intop(|, v1, v2);
+    case LUA_OPBXOR: return intop(^, v1, v2);
+    case LUA_OPSHL: return luaV_shiftl(v1, v2);
+    case LUA_OPSHR: return luaV_shiftl(v1, -v2);
+    case LUA_OPUNM: return intop(-, 0, v1);
+    case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
     default: lua_assert(0); return 0;
   }
 }
 
 
+static lua_Number numarith (lua_State *L, int op, lua_Number v1,
+                                                  lua_Number v2) {
+  switch (op) {
+    case LUA_OPADD: return luai_numadd(L, v1, v2);
+    case LUA_OPSUB: return luai_numsub(L, v1, v2);
+    case LUA_OPMUL: return luai_nummul(L, v1, v2);
+    case LUA_OPDIV: return luai_numdiv(L, v1, v2);
+    case LUA_OPPOW: return luai_numpow(L, v1, v2);
+    case LUA_OPUNM: return luai_numunm(L, v1);
+    case LUA_OPMOD: {
+      lua_Number m;
+      luai_nummod(L, v1, v2, m);
+      return m;
+    }
+    default: lua_assert(0); return 0;
+  }
+}
+
+
+void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
+                 TValue *res) {
+  switch (op) {
+    case LUA_OPIDIV: case LUA_OPBAND: case LUA_OPBOR:
+    case LUA_OPBXOR: case LUA_OPSHL: case LUA_OPSHR:
+    case LUA_OPBNOT: {  /* operates only on integers */
+      lua_Integer i1; lua_Integer i2;
+      if (tointeger(p1, &i1) && tointeger(p2, &i2)) {
+        setivalue(res, intarith(L, op, i1, i2));
+        return;
+      }
+      else break;  /* go to the end */
+    }
+    case LUA_OPDIV: case LUA_OPPOW: {  /* operate only on floats */
+      lua_Number n1; lua_Number n2;
+      if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
+        setfltvalue(res, numarith(L, op, n1, n2));
+        return;
+      }
+      else break;  /* go to the end */
+    }
+    default: {  /* other operations */
+      lua_Number n1; lua_Number n2;
+      if (ttisinteger(p1) && ttisinteger(p2)) {
+        setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
+        return;
+      }
+      else if (tonumber(p1, &n1) && tonumber(p2, &n2)) {
+        setfltvalue(res, numarith(L, op, n1, n2));
+        return;
+      }
+      else break;  /* go to the end */
+    }
+  }
+  /* could not perform raw operation; try metamethod */
+  lua_assert(L != NULL);  /* should not fail when folding (compile time) */
+  luaT_trybinTM(L, p1, p2, res, cast(TMS, op - LUA_OPADD + TM_ADD));
+}
+
+
 int luaO_hexavalue (int c) {
   if (lisdigit(c)) return c - '0';
   else return ltolower(c) - 'a' + 10;
 }
 
 
-#if !defined(lua_strx2number)
-
-#include <math.h>
-
-
 static int isneg (const char **s) {
   if (**s == '-') { (*s)++; return 1; }
   else if (**s == '+') (*s)++;
@@ -102,80 +162,205 @@ static int isneg (const char **s) {
 }
 
 
-static lua_Number readhexa (const char **s, lua_Number r, int *count) {
+/*
-  for (; lisxdigit(cast_uchar(**s)); (*s)++) {  /* read integer part */
+** {======================================================
-    r = (r * cast_num(16.0)) + cast_num(luaO_hexavalue(cast_uchar(**s)));
+** lua_strx2number converts an hexadecimal numeric string to a number.
-    (*count)++;
+** In C99, 'strtod' does both conversions. C89, however, has no function
-  }
+** to convert floating hexadecimal strings to numbers. For these
-  return r;
+** systems, you can leave 'lua_strx2number' undefined and Lua will
-}
+** provide its own implementation.
+** =======================================================
+*/
+#if !defined(lua_strx2number)		/* { */
 
+#if defined(LUA_USE_C99)		/* { */
+
+#define lua_strx2number(s,p)    lua_str2number(s,p)
+
+#else					/* }{ */
+
+/* Lua's implementation for 'lua_strx2number' */
+
+#include <math.h>
+
+/* maximum number of significant digits to read (to avoid overflows
+   even with single floats) */
+#define MAXSIGDIG	30
 
 /*
 ** convert an hexadecimal numeric string to a number, following
 ** C99 specification for 'strtod'
 */
 static lua_Number lua_strx2number (const char *s, char **endptr) {
-  lua_Number r = 0.0;
+  lua_Number r = 0.0;  /* result (accumulator) */
-  int e = 0, i = 0;
+  int sigdig = 0;  /* number of significant digits */
+  int nosigdig = 0;  /* number of non-significant digits */
+  int e = 0;  /* exponent correction */
   int neg = 0;  /* 1 if number is negative */
+  int dot = 0;  /* true after seen a dot */
   *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' */
+  for (s += 2; ; s++) {  /* skip '0x' and read numeral */
-  r = readhexa(&s, r, &i);  /* read integer part */
+    if (*s == '.') {
-  if (*s == '.') {
+      if (dot) break;  /* second dot? stop loop */
-    s++;  /* skip dot */
+      else dot = 1;
-    r = readhexa(&s, r, &e);  /* read fractional part */
+    }
+    else if (lisxdigit(cast_uchar(*s))) {
+      if (sigdig == 0 && *s == '0') {  /* non-significant zero? */
+        nosigdig++;
+        if (dot) e--;  /* zero after dot? correct exponent */
+      }
+      else {
+        if (++sigdig <= MAXSIGDIG) {  /* can read it without overflow? */
+          r = (r * cast_num(16.0)) + luaO_hexavalue(cast_uchar(*s));
+          if (dot) e--;  /* decimal digit */
+        }
+        else  /* too many digits; ignore */ 
+          if (!dot) e++;  /* still count it for exponent */
+      }
+    }
+    else break;  /* neither a dot nor a digit */
   }
-  if (i == 0 && e == 0)
+  if (nosigdig + sigdig == 0)  /* no digits? */
-    return 0.0;  /* invalid format (no digit) */
+    return 0.0;  /* invalid format */
-  e *= -4;  /* each fractional digit divides value by 2^-4 */
   *endptr = cast(char *, s);  /* valid up to here */
+  e *= 4;  /* each digit multiplies/divides value by 2^4 */
   if (*s == 'p' || *s == 'P') {  /* exponent part? */
-    int exp1 = 0;
+    int exp1 = 0;  /* exponent value */
-    int neg1;
+    int neg1;  /* exponent signal */
     s++;  /* skip 'p' */
     neg1 = isneg(&s);  /* signal */
     if (!lisdigit(cast_uchar(*s)))
-      goto ret;  /* must have at least one digit */
+      return 0.0;  /* invalid; must have at least one digit */
     while (lisdigit(cast_uchar(*s)))  /* read exponent */
       exp1 = exp1 * 10 + *(s++) - '0';
     if (neg1) exp1 = -exp1;
     e += exp1;
+    *endptr = cast(char *, s);  /* valid up to here */
   }
-  *endptr = cast(char *, s);  /* valid up to here */
- ret:
   if (neg) r = -r;
   return l_mathop(ldexp)(r, e);
 }
 
-#endif
+#endif					/* } */
+
+#endif					/* } */
+
+/* }====================================================== */
 
 
-int luaO_str2d (const char *s, size_t len, lua_Number *result) {
+static const char *l_str2d (const char *s, lua_Number *result) {
   char *endptr;
   if (strpbrk(s, "nN"))  /* reject 'inf' and 'nan' */
-    return 0;
+    return NULL;
-  else if (strpbrk(s, "xX"))  /* hexa? */
+  else if (strpbrk(s, "xX"))  /* hex? */
     *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 */
+  return (*endptr == '\0' ? endptr : NULL);  /* OK if no trailing characters */
 }
 
 
+static const char *l_str2int (const char *s, lua_Integer *result) {
+  lua_Unsigned a = 0;
+  int empty = 1;
+  int neg;
+  while (lisspace(cast_uchar(*s))) s++;  /* skip initial spaces */
+  neg = isneg(&s);
+  if (s[0] == '0' &&
+      (s[1] == 'x' || s[1] == 'X')) {  /* hex? */
+    s += 2;  /* skip '0x' */
+    for (; lisxdigit(cast_uchar(*s)); s++) {
+      a = a * 16 + luaO_hexavalue(cast_uchar(*s));
+      empty = 0;
+    }
+  }
+  else {  /* decimal */
+    for (; lisdigit(cast_uchar(*s)); s++) {
+      a = a * 10 + luaO_hexavalue(cast_uchar(*s));
+      empty = 0;
+    }
+  }
+  while (lisspace(cast_uchar(*s))) s++;  /* skip trailing spaces */
+  if (empty || *s != '\0') return NULL;  /* something wrong in the numeral */
+  else {
+    *result = l_castU2S((neg) ? 0u - a : a);
+    return s;
+  }
+}
+
+
+size_t luaO_str2num (const char *s, TValue *o) {
+  lua_Integer i; lua_Number n;
+  const char *e;
+  if ((e = l_str2int(s, &i)) != NULL) {  /* try as an integer */
+    setivalue(o, i);
+  }
+  else if ((e = l_str2d(s, &n)) != NULL) {  /* else try as a float */
+    setfltvalue(o, n);
+  }
+  else
+    return 0;  /* conversion failed */
+  return (e - s + 1);  /* success; return string size */
+}
+
+
+int luaO_utf8esc (char *buff, unsigned long x) {
+  int n = 1;  /* number of bytes put in buffer (backwards) */
+  lua_assert(x <= 0x10FFFF);
+  if (x < 0x80)  /* ascii? */
+    buff[UTF8BUFFSZ - 1] = cast(char, x);
+  else {  /* need continuation bytes */
+    unsigned int mfb = 0x3f;  /* maximum that fits in first byte */
+    do {
+      buff[UTF8BUFFSZ - (n++)] = 0x80 | (x & 0x3f);  /* add continuation byte */
+      x >>= 6;  /* remove added bits */
+      mfb >>= 1;  /* now there is one less bit available in first byte */
+    } while (x > mfb);  /* still needs continuation byte? */
+    buff[UTF8BUFFSZ - n] = cast(char, (~mfb << 1) | x);  /* add first byte */
+  }
+  return n;
+}
+
+
+/* maximum length of the conversion of a number to a string */
+#define MAXNUMBER2STR	50
+
+
+/*
+** Convert a number object to a string
+*/
+void luaO_tostring (lua_State *L, StkId obj) {
+  char buff[MAXNUMBER2STR];
+  size_t len;
+  lua_assert(ttisnumber(obj));
+  if (ttisinteger(obj))
+    len = lua_integer2str(buff, ivalue(obj));
+  else {
+    len = lua_number2str(buff, fltvalue(obj));
+#if !defined(LUA_COMPAT_FLOATSTRING)
+    if (buff[strspn(buff, "-0123456789")] == '\0') {  /* looks like an int? */
+      buff[len++] = '.';
+      buff[len++] = '0';  /* adds '.0' to result */
+    }
+#endif
+  }
+  setsvalue2s(L, obj, luaS_newlstr(L, buff, len));
+}
+
 
 static void pushstr (lua_State *L, const char *str, size_t l) {
   setsvalue2s(L, L->top++, luaS_newlstr(L, str, l));
 }
 
 
-/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
+/* this function handles only '%d', '%c', '%f', '%p', and '%s' 
+   conventional formats, plus Lua-specific '%I' and '%U' */
 const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
   int n = 0;
   for (;;) {
@@ -191,17 +376,26 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
         break;
       }
       case 'c': {
-        char buff;
+        char buff = cast(char, va_arg(argp, int));
-        buff = cast(char, va_arg(argp, int));
+        if (lisprint(cast_uchar(buff)))
-        pushstr(L, &buff, 1);
+          pushstr(L, &buff, 1);
+        else  /* non-printable character; print its code */
+          luaO_pushfstring(L, "<\\%d>", cast_uchar(buff));
         break;
       }
       case 'd': {
-        setnvalue(L->top++, cast_num(va_arg(argp, int)));
+        setivalue(L->top++, va_arg(argp, int));
+        luaO_tostring(L, L->top - 1);
+        break;
+      }
+      case 'I': {
+        setivalue(L->top++, cast(lua_Integer, va_arg(argp, l_uacInt)));
+        luaO_tostring(L, L->top - 1);
         break;
       }
       case 'f': {
-        setnvalue(L->top++, cast_num(va_arg(argp, l_uacNumber)));
+        setfltvalue(L->top++, cast_num(va_arg(argp, l_uacNumber)));
+        luaO_tostring(L, L->top - 1);
         break;
       }
       case 'p': {
@@ -210,14 +404,19 @@ const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
         pushstr(L, buff, l);
         break;
       }
+      case 'U': {
+        char buff[UTF8BUFFSZ];
+        int l = luaO_utf8esc(buff, cast(long, va_arg(argp, long)));
+        pushstr(L, buff + UTF8BUFFSZ - l, l);
+        break;
+      }
       case '%': {
         pushstr(L, "%", 1);
         break;
       }
       default: {
-        luaG_runerror(L,
+        luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
-            "invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"),
+                         *(e + 1));
-            *(e + 1));
       }
     }
     n += 2;

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 2.70 2012/05/11 14:10:50 roberto Exp roberto $
+** $Id: lobject.h,v 2.102 2014/09/04 18:15:29 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -20,13 +20,12 @@
 ** Extra tags for non-values
 */
 #define LUA_TPROTO	LUA_NUMTAGS
-#define LUA_TUPVAL	(LUA_NUMTAGS+1)
+#define LUA_TDEADKEY	(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)
+#define LUA_TOTALTAGS	(LUA_TPROTO + 2)
 
 
 /*
@@ -57,6 +56,11 @@
 #define LUA_TLNGSTR	(LUA_TSTRING | (1 << 4))  /* long strings */
 
 
+/* Variant tags for numbers */
+#define LUA_TNUMFLT	(LUA_TNUMBER | (0 << 4))  /* float numbers */
+#define LUA_TNUMINT	(LUA_TNUMBER | (1 << 4))  /* integer numbers */
+
+
 /* Bit mark for collectable types */
 #define BIT_ISCOLLECTABLE	(1 << 6)
 
@@ -65,9 +69,9 @@
 
 
 /*
-** Union of all collectable objects
+** Common type for all collectable objects
 */
-typedef union GCObject GCObject;
+typedef struct GCObject GCObject;
 
 
 /*
@@ -78,11 +82,11 @@ typedef union GCObject GCObject;
 
 
 /*
-** Common header in struct form
+** Common type has only the common header
 */
-typedef struct GCheader {
+struct GCObject {
   CommonHeader;
-} GCheader;
+};
 
 
 
@@ -92,8 +96,6 @@ typedef struct GCheader {
 typedef union Value Value;
 
 
-#define numfield	lua_Number n;    /* numbers */
-
 
 
 /*
@@ -111,7 +113,6 @@ typedef struct lua_TValue TValue;
 
 
 #define val_(o)		((o)->value_)
-#define num_(o)		(val_(o).n)
 
 
 /* raw type tag of a TValue */
@@ -124,13 +125,15 @@ typedef struct lua_TValue TValue;
 #define ttype(o)	(rttype(o) & 0x3F)
 
 /* type tag of a TValue with no variants (bits 0-3) */
-#define ttypenv(o)	(novariant(rttype(o)))
+#define ttnov(o)	(novariant(rttype(o)))
 
 
 /* Macros to test type */
 #define checktag(o,t)		(rttype(o) == (t))
-#define checktype(o,t)		(ttypenv(o) == (t))
+#define checktype(o,t)		(ttnov(o) == (t))
-#define ttisnumber(o)		checktag((o), LUA_TNUMBER)
+#define ttisnumber(o)		checktype((o), LUA_TNUMBER)
+#define ttisfloat(o)		checktag((o), LUA_TNUMFLT)
+#define ttisinteger(o)		checktag((o), LUA_TNUMINT)
 #define ttisnil(o)		checktag((o), LUA_TNIL)
 #define ttisboolean(o)		checktag((o), LUA_TBOOLEAN)
 #define ttislightuserdata(o)	checktag((o), LUA_TLIGHTUSERDATA)
@@ -143,27 +146,25 @@ typedef struct lua_TValue TValue;
 #define ttisCclosure(o)		checktag((o), ctb(LUA_TCCL))
 #define ttisLclosure(o)		checktag((o), ctb(LUA_TLCL))
 #define ttislcf(o)		checktag((o), LUA_TLCF)
-#define ttisuserdata(o)		checktag((o), ctb(LUA_TUSERDATA))
+#define ttisfulluserdata(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 nvalue(o)	check_exp(ttisnumber(o), num_(o))
+#define ivalue(o)	check_exp(ttisinteger(o), val_(o).i)
+#define fltvalue(o)	check_exp(ttisfloat(o), val_(o).n)
 #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)	check_exp(ttisstring(o), gco2ts(val_(o).gc))
-#define tsvalue(o)	(&rawtsvalue(o)->tsv)
+#define uvalue(o)	check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
-#define rawuvalue(o)	check_exp(ttisuserdata(o), &val_(o).gc->u)
+#define clvalue(o)	check_exp(ttisclosure(o), gco2cl(val_(o).gc))
-#define uvalue(o)	(&rawuvalue(o)->uv)
+#define clLvalue(o)	check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
-#define clvalue(o)	check_exp(ttisclosure(o), &val_(o).gc->cl)
+#define clCvalue(o)	check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
-#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 hvalue(o)	check_exp(ttistable(o), gco2t(val_(o).gc))
 #define bvalue(o)	check_exp(ttisboolean(o), val_(o).b)
-#define thvalue(o)	check_exp(ttisthread(o), &val_(o).gc->th)
+#define thvalue(o)	check_exp(ttisthread(o), gco2th(val_(o).gc))
 /* 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))
 
@@ -174,7 +175,7 @@ typedef struct lua_TValue TValue;
 
 
 /* Macros for internal tests */
-#define righttt(obj)		(ttype(obj) == gcvalue(obj)->gch.tt)
+#define righttt(obj)		(ttype(obj) == gcvalue(obj)->tt)
 
 #define checkliveness(g,obj) \
 	lua_longassert(!iscollectable(obj) || \
@@ -184,8 +185,11 @@ typedef struct lua_TValue TValue;
 /* Macros to set values */
 #define settt_(o,t)	((o)->tt_=(t))
 
-#define setnvalue(obj,x) \
+#define setfltvalue(obj,x) \
-  { TValue *io=(obj); num_(io)=(x); settt_(io, LUA_TNUMBER); }
+  { TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_TNUMFLT); }
+
+#define setivalue(obj,x) \
+  { TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_TNUMINT); }
 
 #define setnilvalue(obj) settt_(obj, LUA_TNIL)
 
@@ -199,38 +203,37 @@ typedef struct lua_TValue TValue;
   { TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
 
 #define setgcovalue(L,obj,x) \
-  { TValue *io=(obj); GCObject *i_g=(x); \
+  { TValue *io = (obj); GCObject *i_g=(x); \
-    val_(io).gc=i_g; settt_(io, ctb(gch(i_g)->tt)); }
+    val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
 
 #define setsvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); TString *x_ = (x); \
-    TString *x_ = (x); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
-    val_(io).gc=cast(GCObject *, x_); settt_(io, ctb(x_->tsv.tt)); \
     checkliveness(G(L),io); }
 
 #define setuvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); Udata *x_ = (x); \
-    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TUSERDATA)); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TUSERDATA)); \
     checkliveness(G(L),io); }
 
 #define setthvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); lua_State *x_ = (x); \
-    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTHREAD)); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTHREAD)); \
     checkliveness(G(L),io); }
 
 #define setclLvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); LClosure *x_ = (x); \
-    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TLCL)); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TLCL)); \
     checkliveness(G(L),io); }
 
 #define setclCvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); CClosure *x_ = (x); \
-    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TCCL)); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TCCL)); \
     checkliveness(G(L),io); }
 
 #define sethvalue(L,obj,x) \
-  { TValue *io=(obj); \
+  { TValue *io = (obj); Table *x_ = (x); \
-    val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTABLE)); \
+    val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_TTABLE)); \
     checkliveness(G(L),io); }
 
 #define setdeadvalue(obj)	settt_(obj, LUA_TDEADKEY)
@@ -238,9 +241,8 @@ typedef struct lua_TValue TValue;
 
 
 #define setobj(L,obj1,obj2) \
-	{ const TValue *io2=(obj2); TValue *io1=(obj1); \
+	{ TValue *io1=(obj1); *io1 = *(obj2); \
-	  io1->value_ = io2->value_; io1->tt_ = io2->tt_; \
+	  (void)L; checkliveness(G(L),io1); }
-	  checkliveness(G(L),io1); }
 
 
 /*
@@ -263,119 +265,6 @@ typedef struct lua_TValue TValue;
 #define setsvalue2n	setsvalue
 
 
-/* check whether a number is valid (useful only for NaN trick) */
-#define luai_checknum(L,o,c)	{ /* empty */ }
-
-
-/*
-** {======================================================
-** NaN Trick
-** =======================================================
-*/
-#if defined(LUA_NANTRICK)
-
-/*
-** numbers are represented in the 'd_' field. All other values have the
-** value (NNMARK | tag) in 'tt__'. A number with such pattern would be
-** a "signaled NaN", which is never generated by regular operations by
-** the CPU (nor by 'strtod')
-*/
-
-/* allows for external implementation for part of the trick */
-#if !defined(NNMARK)	/* { */
-
-
-#if !defined(LUA_IEEEENDIAN)
-#error option 'LUA_NANTRICK' needs 'LUA_IEEEENDIAN'
-#endif
-
-
-#define NNMARK		0x7FF7A500
-#define NNMASK		0x7FFFFF00
-
-#undef TValuefields
-#undef NILCONSTANT
-
-#if (LUA_IEEEENDIAN == 0)	/* { */
-
-/* little endian */
-#define TValuefields  \
-	union { struct { Value v__; int tt__; } i; double d__; } u
-#define NILCONSTANT	{{{NULL}, tag2tt(LUA_TNIL)}}
-/* field-access macros */
-#define v_(o)		((o)->u.i.v__)
-#define d_(o)		((o)->u.d__)
-#define tt_(o)		((o)->u.i.tt__)
-
-#else				/* }{ */
-
-/* big endian */
-#define TValuefields  \
-	union { struct { int tt__; Value v__; } i; double d__; } u
-#define NILCONSTANT	{{tag2tt(LUA_TNIL), {NULL}}}
-/* field-access macros */
-#define v_(o)		((o)->u.i.v__)
-#define d_(o)		((o)->u.d__)
-#define tt_(o)		((o)->u.i.tt__)
-
-#endif				/* } */
-
-#endif			/* } */
-
-
-/* correspondence with standard representation */
-#undef val_
-#define val_(o)		v_(o)
-#undef num_
-#define num_(o)		d_(o)
-
-
-#undef numfield
-#define numfield	/* no such field; numbers are the entire struct */
-
-/* basic check to distinguish numbers from non-numbers */
-#undef ttisnumber
-#define ttisnumber(o)	((tt_(o) & NNMASK) != NNMARK)
-
-#define tag2tt(t)	(NNMARK | (t))
-
-#undef rttype
-#define rttype(o)	(ttisnumber(o) ? LUA_TNUMBER : tt_(o) & 0xff)
-
-#undef settt_
-#define settt_(o,t)	(tt_(o) = tag2tt(t))
-
-#undef setnvalue
-#define setnvalue(obj,x) \
-	{ TValue *io_=(obj); num_(io_)=(x); lua_assert(ttisnumber(io_)); }
-
-#undef setobj
-#define setobj(L,obj1,obj2) \
-	{ const TValue *o2_=(obj2); TValue *o1_=(obj1); \
-	  o1_->u = o2_->u; \
-	  checkliveness(G(L),o1_); }
-
-
-/*
-** these redefinitions are not mandatory, but these forms are more efficient
-*/
-
-#undef checktag
-#undef checktype
-#define checktag(o,t)	(tt_(o) == tag2tt(t))
-#define checktype(o,t)	(ctb(tt_(o) | VARBITS) == ctb(tag2tt(t) | VARBITS))
-
-#undef ttisequal
-#define ttisequal(o1,o2)  \
-	(ttisnumber(o1) ? ttisnumber(o2) : (tt_(o1) == tt_(o2)))
-
-
-#undef luai_checknum
-#define luai_checknum(L,o,c)	{ if (!ttisnumber(o)) c; }
-
-#endif
-/* }====================================================== */
-
 
 
 /*
@@ -390,7 +279,8 @@ union Value {
   void *p;         /* light userdata */
   int b;           /* booleans */
   lua_CFunction f; /* light C functions */
-  numfield         /* numbers */
+  lua_Integer i;   /* integer numbers */
+  lua_Number n;    /* float numbers */
 };
 
 
@@ -406,39 +296,78 @@ typedef TValue *StkId;  /* index to stack elements */
 
 /*
 ** Header for string value; string bytes follow the end of this structure
+** (aligned according to 'UTString'; see next).
 */
-typedef union TString {
+typedef struct TString {
-  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
+  CommonHeader;
-  struct {
+  lu_byte extra;  /* reserved words for short strings; "has hash" for longs */
-    CommonHeader;
+  unsigned int hash;
-    lu_byte extra;  /* reserved words for short strings; "has hash" for longs */
+  size_t len;  /* number of characters in string */
-    unsigned int hash;
+  struct TString *hnext;  /* linked list for hash table */
-    size_t len;  /* number of characters in string */
-  } tsv;
 } TString;
 
 
-/* get the actual string (array of bytes) from a TString */
+/*
-#define getstr(ts)	cast(const char *, (ts) + 1)
+** Ensures that address after this type is always fully aligned.
+*/
+typedef union UTString {
+  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
+  TString tsv;
+} UTString;
+
+
+/*
+** Get the actual string (array of bytes) from a 'TString'.
+** (Access to 'extra' ensures that value is really a 'TString'.)
+*/
+#define getaddrstr(ts)	(cast(char *, (ts)) + sizeof(UTString))
+#define getstr(ts)  \
+  check_exp(sizeof((ts)->extra), cast(const char*, getaddrstr(ts)))
 
 /* get the actual string (array of bytes) from a Lua value */
-#define svalue(o)       getstr(rawtsvalue(o))
+#define svalue(o)       getstr(tsvalue(o))
 
 
 /*
 ** Header for userdata; memory area follows the end of this structure
+** (aligned according to 'UUdata'; see next).
 */
-typedef union Udata {
+typedef struct Udata {
-  L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
+  CommonHeader;
-  struct {
+  lu_byte ttuv_;  /* user value's tag */
-    CommonHeader;
+  struct Table *metatable;
-    struct Table *metatable;
+  size_t len;  /* number of bytes */
-    struct Table *env;
+  union Value user_;  /* user value */
-    size_t len;  /* number of bytes */
-  } uv;
 } Udata;
 
 
+/*
+** Ensures that address after this type is always fully aligned.
+*/
+typedef union UUdata {
+  L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
+  Udata uv;
+} UUdata;
+
+
+/*
+**  Get the address of memory block inside 'Udata'.
+** (Access to 'ttuv_' ensures that value is really a 'Udata'.)
+*/
+#define getudatamem(u)  \
+  check_exp(sizeof((u)->ttuv_), (cast(char*, (u)) + sizeof(UUdata)))
+
+#define setuservalue(L,u,o) \
+	{ const TValue *io=(o); Udata *iu = (u); \
+	  iu->user_ = io->value_; iu->ttuv_ = io->tt_; \
+	  checkliveness(G(L),io); }
+
+
+#define getuservalue(L,u,o) \
+	{ TValue *io=(o); const Udata *iu = (u); \
+	  io->value_ = iu->user_; io->tt_ = iu->ttuv_; \
+	  checkliveness(G(L),io); }
+
 
 /*
 ** Description of an upvalue for function prototypes
@@ -466,14 +395,9 @@ typedef struct LocVar {
 */
 typedef struct Proto {
   CommonHeader;
-  TValue *k;  /* constants used by the function */
+  lu_byte numparams;  /* number of fixed parameters */
-  Instruction *code;
+  lu_byte is_vararg;
-  struct Proto **p;  /* functions defined inside the function */
+  lu_byte maxstacksize;  /* maximum stack used by this function */
-  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;  /* used for debug information */
   int sizeupvalues;  /* size of 'upvalues' */
   int sizek;  /* size of `k' */
   int sizecode;
@@ -482,10 +406,15 @@ typedef struct Proto {
   int sizelocvars;
   int linedefined;
   int lastlinedefined;
+  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 (debug information) */
+  LocVar *locvars;  /* information about local variables (debug information) */
+  Upvaldesc *upvalues;  /* upvalue information */
+  struct LClosure *cache;  /* last created closure with this prototype */
+  TString  *source;  /* used for debug information */
   GCObject *gclist;
-  lu_byte numparams;  /* number of fixed parameters */
-  lu_byte is_vararg;
-  lu_byte maxstacksize;  /* maximum stack used by this function */
 } Proto;
 
 
@@ -493,17 +422,7 @@ typedef struct Proto {
 /*
 ** Lua Upvalues
 */
-typedef struct UpVal {
+typedef struct UpVal UpVal;
-  CommonHeader;
-  TValue *v;  /* points to stack or to its own value */
-  union {
-    TValue value;  /* the value (when closed) */
-    struct {  /* double linked list (when open) */
-      struct UpVal *prev;
-      struct UpVal *next;
-    } l;
-  } u;
-} UpVal;
 
 
 /*
@@ -545,12 +464,19 @@ typedef union Closure {
 typedef union TKey {
   struct {
     TValuefields;
-    struct Node *next;  /* for chaining */
+    int next;  /* for chaining (offset for next node) */
   } nk;
   TValue tvk;
 } TKey;
 
 
+/* copy a value into a key without messing up field 'next' */
+#define setkey(L,key,obj) \
+	{ TKey *k_=(key); const TValue *io_=(obj); \
+	  k_->nk.value_ = io_->value_; k_->nk.tt_ = io_->tt_; \
+	  (void)L; checkliveness(G(L),io_); }
+
+
 typedef struct Node {
   TValue i_val;
   TKey i_key;
@@ -561,12 +487,12 @@ typedef struct Table {
   CommonHeader;
   lu_byte flags;  /* 1<<p means tagmethod(p) is not present */
   lu_byte lsizenode;  /* log2 of size of `node' array */
-  struct Table *metatable;
+  unsigned int sizearray;  /* size of `array' array */
   TValue *array;  /* array part */
   Node *node;
   Node *lastfree;  /* any free position is before this position */
+  struct Table *metatable;
   GCObject *gclist;
-  int sizearray;  /* size of `array' array */
 } Table;
 
 
@@ -590,13 +516,18 @@ typedef struct Table {
 
 LUAI_DDEC const TValue luaO_nilobject_;
 
+/* size of buffer for 'luaO_utf8esc' function */
+#define UTF8BUFFSZ	8
 
 LUAI_FUNC int luaO_int2fb (unsigned int x);
 LUAI_FUNC int luaO_fb2int (int x);
+LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
 LUAI_FUNC int luaO_ceillog2 (unsigned int x);
-LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2);
+LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
-LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result);
+                           const TValue *p2, TValue *res);
+LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
 LUAI_FUNC int luaO_hexavalue (int c);
+LUAI_FUNC void luaO_tostring (lua_State *L, StkId obj);
 LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
                                                        va_list argp);
 LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);

lopcodes.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.c,v 1.48 2011/04/19 16:22:13 roberto Exp roberto $
+** $Id: lopcodes.c,v 1.52 2013/12/18 14:12:03 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -31,10 +31,17 @@ LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
   "ADD",
   "SUB",
   "MUL",
-  "DIV",
   "MOD",
   "POW",
+  "DIV",
+  "IDIV",
+  "BAND",
+  "BOR",
+  "BXOR",
+  "SHL",
+  "SHR",
   "UNM",
+  "BNOT",
   "NOT",
   "LEN",
   "CONCAT",
@@ -79,10 +86,17 @@ LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_ADD */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SUB */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MUL */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MOD */
  ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_POW */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_IDIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BAND */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BOR */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_BXOR */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SHL */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SHR */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_UNM */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_BNOT */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_NOT */
  ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LEN */
  ,opmode(0, 1, OpArgR, OpArgR, iABC)		/* OP_CONCAT */

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.141 2011/04/19 16:22:13 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.146 2013/12/30 20:47:58 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -187,16 +187,23 @@ OP_SELF,/*	A B C	R(A+1) := R(B); R(A) := R(B)[RK(C)]		*/
 OP_ADD,/*	A B C	R(A) := RK(B) + RK(C)				*/
 OP_SUB,/*	A B C	R(A) := RK(B) - RK(C)				*/
 OP_MUL,/*	A B C	R(A) := RK(B) * RK(C)				*/
-OP_DIV,/*	A B C	R(A) := RK(B) / RK(C)				*/
 OP_MOD,/*	A B C	R(A) := RK(B) % RK(C)				*/
 OP_POW,/*	A B C	R(A) := RK(B) ^ RK(C)				*/
+OP_DIV,/*	A B C	R(A) := RK(B) / RK(C)				*/
+OP_IDIV,/*	A B C	R(A) := RK(B) // RK(C)				*/
+OP_BAND,/*	A B C	R(A) := RK(B) & RK(C)				*/
+OP_BOR,/*	A B C	R(A) := RK(B) | RK(C)				*/
+OP_BXOR,/*	A B C	R(A) := RK(B) ~ RK(C)				*/
+OP_SHL,/*	A B C	R(A) := RK(B) << RK(C)				*/
+OP_SHR,/*	A B C	R(A) := RK(B) >> RK(C)				*/
 OP_UNM,/*	A B	R(A) := -R(B)					*/
+OP_BNOT,/*	A B	R(A) := ~R(B)					*/
 OP_NOT,/*	A B	R(A) := not R(B)				*/
 OP_LEN,/*	A B	R(A) := length of R(B)				*/
 
 OP_CONCAT,/*	A B C	R(A) := R(B).. ... ..R(C)			*/
 
-OP_JMP,/*	A sBx	pc+=sBx; if (A) close all upvalues >= R(A) + 1	*/
+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++		*/

loslib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: loslib.c,v 1.39 2012/05/23 15:37:09 roberto Exp roberto $
+** $Id: loslib.c,v 1.48 2014/10/08 19:57:31 roberto Exp roberto $
 ** Standard Operating System library
 ** See Copyright Notice in lua.h
 */
@@ -20,60 +20,90 @@
 #include "lualib.h"
 
 
+#if !defined(LUA_STRFTIMEOPTIONS)	/* { */
 /*
 ** list of valid conversion specifiers for the 'strftime' function
 */
-#if !defined(LUA_STRFTIMEOPTIONS)
 
 #if !defined(LUA_USE_POSIX)
 #define LUA_STRFTIMEOPTIONS	{ "aAbBcdHIjmMpSUwWxXyYz%", "" }
 #else
 #define LUA_STRFTIMEOPTIONS \
-	{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
+	{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "", \
-	  "", "E", "cCxXyY",  \
+	  "E", "cCxXyY",  \
 	  "O", "deHImMSuUVwWy" }
 #endif
 
-#endif
+#endif					/* } */
 
 
 
+#if !defined(l_time_t)		/* { */
+/*
+** type to represent time_t in Lua
+*/
+#define l_timet			lua_Integer
+#define l_pushtime(L,t)		lua_pushinteger(L,(lua_Integer)(t))
+#define l_checktime(L,a)	((time_t)luaL_checkinteger(L,a))
+
+#endif				/* } */
+
+
+
+#if !defined(lua_tmpnam)	/* { */
 /*
 ** By default, Lua uses tmpnam except when POSIX is available, where it
 ** uses mkstemp.
 */
-#if defined(LUA_USE_MKSTEMP)
+
+#if defined(LUA_USE_POSIX)	/* { */
+
 #include <unistd.h>
+
 #define LUA_TMPNAMBUFSIZE	32
+
+#if !defined(LUA_TMPNAMTEMPLATE)
+#define LUA_TMPNAMTEMPLATE	"/tmp/lua_XXXXXX"
+#endif
+
 #define lua_tmpnam(b,e) { \
-        strcpy(b, "/tmp/lua_XXXXXX"); \
+        strcpy(b, LUA_TMPNAMTEMPLATE); \
         e = mkstemp(b); \
         if (e != -1) close(e); \
         e = (e == -1); }
 
-#elif !defined(lua_tmpnam)
+#else				/* }{ */
 
+/* ANSI definitions */
 #define LUA_TMPNAMBUFSIZE	L_tmpnam
 #define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
 
-#endif
+#endif				/* } */
+
+#endif				/* } */
 
 
+
+#if !defined(l_gmtime)		/* { */
 /*
 ** By default, Lua uses gmtime/localtime, except when POSIX is available,
 ** where it uses gmtime_r/localtime_r
 */
-#if defined(LUA_USE_GMTIME_R)
+
+#if defined(LUA_USE_POSIX)	/* { */
 
 #define l_gmtime(t,r)		gmtime_r(t,r)
 #define l_localtime(t,r)	localtime_r(t,r)
 
-#elif !defined(l_gmtime)
+#else				/* }{ */
 
+/* ANSI definitions */
 #define l_gmtime(t,r)		((void)r, gmtime(t))
 #define l_localtime(t,r)  	((void)r, localtime(t))
 
-#endif
+#endif				/* } */
+
+#endif				/* } */
 
 
 
@@ -147,8 +177,7 @@ static void setboolfield (lua_State *L, const char *key, int value) {
 
 static int getboolfield (lua_State *L, const char *key) {
   int res;
-  lua_getfield(L, -1, key);
+  res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
-  res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
   lua_pop(L, 1);
   return res;
 }
@@ -160,7 +189,7 @@ static int getfield (lua_State *L, const char *key, int d) {
   res = (int)lua_tointegerx(L, -1, &isnum);
   if (!isnum) {
     if (d < 0)
-      return luaL_error(L, "field " LUA_QS " missing in date table", key);
+      return luaL_error(L, "field '%s' missing in date table", key);
     res = d;
   }
   lua_pop(L, 1);
@@ -194,7 +223,7 @@ static const char *checkoption (lua_State *L, const char *conv, char *buff) {
 
 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));
+  time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
   struct tm tmr, *stm;
   if (*s == '!') {  /* UTC? */
     stm = l_gmtime(&t, &tmr);
@@ -255,17 +284,19 @@ static int os_time (lua_State *L) {
     ts.tm_isdst = getboolfield(L, "isdst");
     t = mktime(&ts);
   }
-  if (t == (time_t)(-1))
+  if (t != (time_t)(l_timet)t)
+    luaL_error(L, "time result cannot be represented in this Lua instalation");
+  else if (t == (time_t)(-1))
     lua_pushnil(L);
   else
-    lua_pushnumber(L, (lua_Number)t);
+    l_pushtime(L, t);
   return 1;
 }
 
 
 static int os_difftime (lua_State *L) {
-  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+  double res = difftime((l_checktime(L, 1)), (l_checktime(L, 2)));
-                             (time_t)(luaL_optnumber(L, 2, 0))));
+  lua_pushnumber(L, (lua_Number)res);
   return 1;
 }
 
@@ -289,7 +320,7 @@ static int os_exit (lua_State *L) {
   if (lua_isboolean(L, 1))
     status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
   else
-    status = luaL_optint(L, 1, EXIT_SUCCESS);
+    status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
   if (lua_toboolean(L, 2))
     lua_close(L);
   if (L) exit(status);  /* 'if' to avoid warnings for unreachable 'return' */

lparser.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 2.129 2012/08/06 13:36:34 roberto Exp roberto $
+** $Id: lparser.c,v 2.142 2014/07/21 16:02:10 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -35,6 +35,10 @@
 #define hasmultret(k)		((k) == VCALL || (k) == VVARARG)
 
 
+/* because all strings are unified by the scanner, the parser
+   can use pointer equality for string equality */
+#define eqstr(a,b)	((a) == (b))
+
 
 /*
 ** nodes for block list (list of active blocks)
@@ -57,16 +61,6 @@ static void statement (LexState *ls);
 static void expr (LexState *ls, expdesc *v);
 
 
-static void anchor_token (LexState *ls) {
-  /* last token from outer function must be EOS */
-  lua_assert(ls->fs != NULL || ls->t.token == TK_EOS);
-  if (ls->t.token == TK_NAME || ls->t.token == TK_STRING) {
-    TString *ts = ls->t.seminfo.ts;
-    luaX_newstring(ls, getstr(ts), ts->tsv.len);
-  }
-}
-
-
 /* semantic error */
 static l_noret semerror (LexState *ls, const char *msg) {
   ls->t.token = 0;  /* remove 'near to' from final message */
@@ -222,7 +216,7 @@ static int searchupvalue (FuncState *fs, TString *name) {
   int i;
   Upvaldesc *up = fs->f->upvalues;
   for (i = 0; i < fs->nups; i++) {
-    if (luaS_eqstr(up[i].name, name)) return i;
+    if (eqstr(up[i].name, name)) return i;
   }
   return -1;  /* not found */
 }
@@ -246,7 +240,7 @@ static int newupvalue (FuncState *fs, TString *name, expdesc *v) {
 static int searchvar (FuncState *fs, TString *n) {
   int i;
   for (i = cast_int(fs->nactvar) - 1; i >= 0; i--) {
-    if (luaS_eqstr(n, getlocvar(fs, i)->varname))
+    if (eqstr(n, getlocvar(fs, i)->varname))
       return i;
   }
   return -1;  /* not found */
@@ -342,11 +336,11 @@ static void closegoto (LexState *ls, int g, Labeldesc *label) {
   FuncState *fs = ls->fs;
   Labellist *gl = &ls->dyd->gt;
   Labeldesc *gt = &gl->arr[g];
-  lua_assert(luaS_eqstr(gt->name, label->name));
+  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,
+      "<goto %s> at line %d jumps into the scope of local '%s'",
       getstr(gt->name), gt->line, getstr(vname));
     semerror(ls, msg);
   }
@@ -369,7 +363,7 @@ static int findlabel (LexState *ls, int g) {
   /* check labels in current block for a match */
   for (i = bl->firstlabel; i < dyd->label.n; i++) {
     Labeldesc *lb = &dyd->label.arr[i];
-    if (luaS_eqstr(lb->name, gt->name)) {  /* correct label? */
+    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);
@@ -403,7 +397,7 @@ static void findgotos (LexState *ls, Labeldesc *lb) {
   Labellist *gl = &ls->dyd->gt;
   int i = ls->fs->bl->firstgoto;
   while (i < gl->n) {
-    if (luaS_eqstr(gl->arr[i].name, lb->name))
+    if (eqstr(gl->arr[i].name, lb->name))
       closegoto(ls, i, lb);
     else
       i++;
@@ -463,7 +457,7 @@ static void breaklabel (LexState *ls) {
 static l_noret undefgoto (LexState *ls, Labeldesc *gt) {
   const char *msg = isreserved(gt->name)
                     ? "<%s> at line %d not inside a loop"
-                    : "no visible label " LUA_QS " for <goto> at line %d";
+                    : "no visible label '%s' for <goto> at line %d";
   msg = luaO_pushfstring(ls->L, msg, getstr(gt->name), gt->line);
   semerror(ls, msg);
 }
@@ -525,7 +519,6 @@ static void codeclosure (LexState *ls, expdesc *v) {
 
 
 static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
-  lua_State *L = ls->L;
   Proto *f;
   fs->prev = ls->fs;  /* linked list of funcstates */
   fs->ls = ls;
@@ -544,10 +537,6 @@ static void open_func (LexState *ls, FuncState *fs, BlockCnt *bl) {
   f = fs->f;
   f->source = ls->source;
   f->maxstacksize = 2;  /* registers 0/1 are always valid */
-  fs->h = luaH_new(L);
-  /* anchor table of constants (to avoid being collected) */
-  sethvalue2s(L, L->top, fs->h);
-  incr_top(L);
   enterblock(fs, bl, 0);
 }
 
@@ -572,9 +561,6 @@ static void close_func (LexState *ls) {
   f->sizeupvalues = fs->nups;
   lua_assert(fs->bl == NULL);
   ls->fs = fs->prev;
-  /* last token read was anchored in defunct function; must re-anchor it */
-  anchor_token(ls);
-  L->top--;  /* pop table of constants */
   luaC_checkGC(L);
 }
 
@@ -775,7 +761,7 @@ static void parlist (LexState *ls) {
           f->is_vararg = 1;
           break;
         }
-        default: luaX_syntaxerror(ls, "<name> or " LUA_QL("...") " expected");
+        default: luaX_syntaxerror(ls, "<name> or '...' expected");
       }
     } while (!f->is_vararg && testnext(ls, ','));
   }
@@ -935,14 +921,19 @@ static void suffixedexp (LexState *ls, expdesc *v) {
 
 
 static void simpleexp (LexState *ls, expdesc *v) {
-  /* simpleexp -> NUMBER | STRING | NIL | TRUE | FALSE | ... |
+  /* simpleexp -> FLT | INT | STRING | NIL | TRUE | FALSE | ... |
                   constructor | FUNCTION body | suffixedexp */
   switch (ls->t.token) {
-    case TK_NUMBER: {
+    case TK_FLT: {
-      init_exp(v, VKNUM, 0);
+      init_exp(v, VKFLT, 0);
       v->u.nval = ls->t.seminfo.r;
       break;
     }
+    case TK_INT: {
+      init_exp(v, VKINT, 0);
+      v->u.ival = ls->t.seminfo.i;
+      break;
+    }
     case TK_STRING: {
       codestring(ls, v, ls->t.seminfo.ts);
       break;
@@ -962,7 +953,7 @@ static void simpleexp (LexState *ls, expdesc *v) {
     case TK_DOTS: {  /* vararg */
       FuncState *fs = ls->fs;
       check_condition(ls, fs->f->is_vararg,
-                      "cannot use " LUA_QL("...") " outside a vararg function");
+                      "cannot use '...' outside a vararg function");
       init_exp(v, VVARARG, luaK_codeABC(fs, OP_VARARG, 0, 1, 0));
       break;
     }
@@ -988,6 +979,7 @@ static UnOpr getunopr (int op) {
   switch (op) {
     case TK_NOT: return OPR_NOT;
     case '-': return OPR_MINUS;
+    case '~': return OPR_BNOT;
     case '#': return OPR_LEN;
     default: return OPR_NOUNOPR;
   }
@@ -999,9 +991,15 @@ static BinOpr getbinopr (int op) {
     case '+': return OPR_ADD;
     case '-': return OPR_SUB;
     case '*': return OPR_MUL;
-    case '/': return OPR_DIV;
     case '%': return OPR_MOD;
     case '^': return OPR_POW;
+    case '/': return OPR_DIV;
+    case TK_IDIV: return OPR_IDIV;
+    case '&': return OPR_BAND;
+    case '|': return OPR_BOR;
+    case '~': return OPR_BXOR;
+    case TK_SHL: return OPR_SHL;
+    case TK_SHR: return OPR_SHR;
     case TK_CONCAT: return OPR_CONCAT;
     case TK_NE: return OPR_NE;
     case TK_EQ: return OPR_EQ;
@@ -1020,14 +1018,19 @@ static const struct {
   lu_byte left;  /* left priority for each binary operator */
   lu_byte right; /* right priority */
 } priority[] = {  /* ORDER OPR */
-   {6, 6}, {6, 6}, {7, 7}, {7, 7}, {7, 7},  /* `+' `-' `*' `/' `%' */
+   {10, 10}, {10, 10},           /* '+' '-' */
-   {10, 9}, {5, 4},                 /* ^, .. (right associative) */
+   {11, 11}, {11, 11},           /* '*' '%' */
-   {3, 3}, {3, 3}, {3, 3},          /* ==, <, <= */
+   {14, 13},                  /* '^' (right associative) */
-   {3, 3}, {3, 3}, {3, 3},          /* ~=, >, >= */
+   {11, 11}, {11, 11},           /* '/' '//' */
-   {2, 2}, {1, 1}                   /* and, or */
+   {6, 6}, {4, 4}, {5, 5},   /* '&' '|' '~' */
+   {7, 7}, {7, 7},           /* '<<' '>>' */
+   {9, 8},                   /* '..' (right associative) */
+   {3, 3}, {3, 3}, {3, 3},   /* ==, <, <= */
+   {3, 3}, {3, 3}, {3, 3},   /* ~=, >, >= */
+   {2, 2}, {1, 1}            /* and, or */
 };
 
-#define UNARY_PRIORITY	8  /* priority for unary operators */
+#define UNARY_PRIORITY	12  /* priority for unary operators */
 
 
 /*
@@ -1195,9 +1198,9 @@ static void gotostat (LexState *ls, int pc) {
 static void checkrepeated (FuncState *fs, Labellist *ll, TString *label) {
   int i;
   for (i = fs->bl->firstlabel; i < ll->n; i++) {
-    if (luaS_eqstr(label, ll->arr[i].name)) {
+    if (eqstr(label, ll->arr[i].name)) {
       const char *msg = luaO_pushfstring(fs->ls->L,
-                          "label " LUA_QS " already defined on line %d",
+                          "label '%s' already defined on line %d",
                           getstr(label), ll->arr[i].line);
       semerror(fs->ls, msg);
     }
@@ -1321,7 +1324,7 @@ static void fornum (LexState *ls, TString *varname, int line) {
   if (testnext(ls, ','))
     exp1(ls);  /* optional step */
   else {  /* default step = 1 */
-    luaK_codek(fs, fs->freereg, luaK_numberK(fs, 1));
+    luaK_codek(fs, fs->freereg, luaK_intK(fs, 1));
     luaK_reserveregs(fs, 1);
   }
   forbody(ls, base, line, 1, 1);
@@ -1364,7 +1367,7 @@ static void forstat (LexState *ls, int line) {
   switch (ls->t.token) {
     case '=': fornum(ls, varname, line); break;
     case ',': case TK_IN: forlist(ls, varname); break;
-    default: luaX_syntaxerror(ls, LUA_QL("=") " or " LUA_QL("in") " expected");
+    default: luaX_syntaxerror(ls, "'=' or 'in' expected");
   }
   check_match(ls, TK_END, TK_FOR, line);
   leaveblock(fs);  /* loop scope (`break' jumps to this point) */
@@ -1615,16 +1618,19 @@ static void mainfunc (LexState *ls, FuncState *fs) {
 }
 
 
-Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
-                      Dyndata *dyd, const char *name, int firstchar) {
+                       Dyndata *dyd, const char *name, int firstchar) {
   LexState lexstate;
   FuncState funcstate;
-  Closure *cl = luaF_newLclosure(L, 1);  /* create main closure */
+  LClosure *cl = luaF_newLclosure(L, 1);  /* create main closure */
-  /* anchor closure (to avoid being collected) */
+  setclLvalue(L, L->top, cl);  /* anchor it (to avoid being collected) */
-  setclLvalue(L, L->top, cl);
   incr_top(L);
-  funcstate.f = cl->l.p = luaF_newproto(L);
+  lexstate.h = luaH_new(L);  /* create table for scanner */
+  sethvalue(L, L->top, lexstate.h);  /* anchor it */
+  incr_top(L);
+  funcstate.f = cl->p = luaF_newproto(L);
   funcstate.f->source = luaS_new(L, name);  /* create and anchor TString */
+  luaC_objbarrier(L, funcstate.f, funcstate.f->source);
   lexstate.buff = buff;
   lexstate.dyd = dyd;
   dyd->actvar.n = dyd->gt.n = dyd->label.n = 0;
@@ -1633,6 +1639,7 @@ Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
   lua_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs);
   /* all scopes should be correctly finished */
   lua_assert(dyd->actvar.n == 0 && dyd->gt.n == 0 && dyd->label.n == 0);
-  return cl;  /* it's on the stack too */
+  L->top--;  /* remove scanner's table */
+  return cl;  /* closure is on the stack, too */
 }
 

lparser.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h,v 1.69 2011/07/27 18:09:01 roberto Exp roberto $
+** $Id: lparser.h,v 1.72 2013/08/30 16:01:37 roberto Exp roberto $
 ** Lua Parser
 ** See Copyright Notice in lua.h
 */
@@ -22,7 +22,8 @@ typedef enum {
   VTRUE,
   VFALSE,
   VK,		/* info = index of constant in `k' */
-  VKNUM,	/* nval = numerical value */
+  VKFLT,	/* nval = numerical float value */
+  VKINT,	/* nval = numerical integer value */
   VNONRELOC,	/* info = result register */
   VLOCAL,	/* info = local register */
   VUPVAL,       /* info = index of upvalue in 'upvalues' */
@@ -46,7 +47,8 @@ typedef struct expdesc {
       lu_byte vt;  /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
     } ind;
     int info;  /* for generic use */
-    lua_Number nval;  /* for VKNUM */
+    lua_Number nval;  /* for VKFLT */
+    lua_Integer ival;    /* for VKINT */
   } u;
   int t;  /* patch list of `exit when true' */
   int f;  /* patch list of `exit when false' */
@@ -95,7 +97,6 @@ struct BlockCnt;  /* defined in lparser.c */
 /* state needed to generate code for a given function */
 typedef struct FuncState {
   Proto *f;  /* current function header */
-  Table *h;  /* table to find (and reuse) elements in `k' */
   struct FuncState *prev;  /* enclosing function */
   struct LexState *ls;  /* lexical state */
   struct BlockCnt *bl;  /* chain of current blocks */
@@ -112,8 +113,8 @@ typedef struct FuncState {
 } FuncState;
 
 
-LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
-                                Dyndata *dyd, const char *name, int firstchar);
+                                 Dyndata *dyd, const char *name, int firstchar);
 
 
 #endif

lstate.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.c,v 2.98 2012/05/30 12:33:44 roberto Exp roberto $
+** $Id: lstate.c,v 2.124 2014/07/24 14:00:16 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -30,10 +30,6 @@
 #define LUAI_GCPAUSE	200  /* 200% */
 #endif
 
-#if !defined(LUAI_GCMAJOR)
-#define LUAI_GCMAJOR	200  /* 200% */
-#endif
-
 #if !defined(LUAI_GCMUL)
 #define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
 #endif
@@ -57,9 +53,7 @@
 ** thread state + extra space
 */
 typedef struct LX {
-#if defined(LUAI_EXTRASPACE)
+  lu_byte extra_[LUA_EXTRASPACE];
-  char buff[LUAI_EXTRASPACE];
-#endif
   lua_State l;
 } LX;
 
@@ -119,6 +113,9 @@ CallInfo *luaE_extendCI (lua_State *L) {
 }
 
 
+/*
+** free all CallInfo structures not in use by a thread
+*/
 void luaE_freeCI (lua_State *L) {
   CallInfo *ci = L->ci;
   CallInfo *next = ci->next;
@@ -130,6 +127,22 @@ void luaE_freeCI (lua_State *L) {
 }
 
 
+/*
+** free half of the CallInfo structures not in use by a thread
+*/
+void luaE_shrinkCI (lua_State *L) {
+  CallInfo *ci = L->ci;
+  while (ci->next != NULL) {  /* while there is 'next' */
+    CallInfo *next2 = ci->next->next;  /* next's next */
+    if (next2 == NULL) break;
+    luaM_free(L, ci->next);  /* remove next */
+    ci->next = next2;  /* remove 'next' from the list */
+    next2->previous = ci;
+    ci = next2;
+  }
+}
+
+
 static void stack_init (lua_State *L1, lua_State *L) {
   int i; CallInfo *ci;
   /* initialize stack array */
@@ -163,22 +176,23 @@ static void freestack (lua_State *L) {
 ** Create registry table and its predefined values
 */
 static void init_registry (lua_State *L, global_State *g) {
-  TValue mt;
+  TValue temp;
   /* create registry */
   Table *registry = luaH_new(L);
   sethvalue(L, &g->l_registry, registry);
   luaH_resize(L, registry, LUA_RIDX_LAST, 0);
   /* registry[LUA_RIDX_MAINTHREAD] = L */
-  setthvalue(L, &mt, L);
+  setthvalue(L, &temp, L);  /* temp = L */
-  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &mt);
+  luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &temp);
   /* registry[LUA_RIDX_GLOBALS] = table of globals */
-  sethvalue(L, &mt, luaH_new(L));
+  sethvalue(L, &temp, luaH_new(L));  /* temp = new table (global table) */
-  luaH_setint(L, registry, LUA_RIDX_GLOBALS, &mt);
+  luaH_setint(L, registry, LUA_RIDX_GLOBALS, &temp);
 }
 
 
 /*
-** open parts of the state that may cause memory-allocation errors
+** open parts of the state that may cause memory-allocation errors.
+** ('g->version' != NULL flags that the state was completely build)
 */
 static void f_luaopen (lua_State *L, void *ud) {
   global_State *g = G(L);
@@ -190,20 +204,23 @@ static void f_luaopen (lua_State *L, void *ud) {
   luaX_init(L);
   /* pre-create memory-error message */
   g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
-  luaS_fix(g->memerrmsg);  /* it should never be collected */
+  luaC_fix(L, obj2gco(g->memerrmsg));  /* it should never be collected */
   g->gcrunning = 1;  /* allow gc */
+  g->version = lua_version(NULL);
+  luai_userstateopen(L);
 }
 
 
 /*
-** preinitialize a state with consistent values without allocating
+** preinitialize a thread with consistent values without allocating
 ** any memory (to avoid errors)
 */
-static void preinit_state (lua_State *L, global_State *g) {
+static void preinit_thread (lua_State *L, global_State *g) {
   G(L) = g;
   L->stack = NULL;
   L->ci = NULL;
   L->stacksize = 0;
+  L->twups = L;  /* thread has no upvalues */
   L->errorJmp = NULL;
   L->nCcalls = 0;
   L->hook = NULL;
@@ -222,6 +239,8 @@ static void close_state (lua_State *L) {
   global_State *g = G(L);
   luaF_close(L, L->stack);  /* close all upvalues for this thread */
   luaC_freeallobjects(L);  /* collect all objects */
+  if (g->version)  /* closing a fully built state? */
+    luai_userstateclose(L);
   luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
   luaZ_freebuffer(L, &g->buff);
   freestack(L);
@@ -231,17 +250,28 @@ static void close_state (lua_State *L) {
 
 
 LUA_API lua_State *lua_newthread (lua_State *L) {
+  global_State *g = G(L);
   lua_State *L1;
   lua_lock(L);
   luaC_checkGC(L);
-  L1 = &luaC_newobj(L, LUA_TTHREAD, sizeof(LX), NULL, offsetof(LX, l))->th;
+  /* create new thread */
+  L1 = &cast(LX *, luaM_newobject(L, LUA_TTHREAD, sizeof(LX)))->l;
+  L1->marked = luaC_white(g);
+  L1->tt = LUA_TTHREAD;
+  /* link it on list 'allgc' */
+  L1->next = g->allgc;
+  g->allgc = obj2gco(L1);
+  /* anchor it on L stack */
   setthvalue(L, L->top, L1);
   api_incr_top(L);
-  preinit_state(L1, G(L));
+  preinit_thread(L1, g);
   L1->hookmask = L->hookmask;
   L1->basehookcount = L->basehookcount;
   L1->hook = L->hook;
   resethookcount(L1);
+  /* initialize L1 extra space */
+  memcpy(lua_getextraspace(L1), lua_getextraspace(g->mainthread),
+         LUA_EXTRASPACE);
   luai_userstatethread(L, L1);
   stack_init(L1, L);  /* init stack */
   lua_unlock(L);
@@ -269,36 +299,32 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
   g = &l->g;
   L->next = NULL;
   L->tt = LUA_TTHREAD;
-  g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
+  g->currentwhite = bitmask(WHITE0BIT);
   L->marked = luaC_white(g);
-  g->gckind = KGC_NORMAL;
+  preinit_thread(L, g);
-  preinit_state(L, g);
   g->frealloc = f;
   g->ud = ud;
   g->mainthread = L;
   g->seed = makeseed(L);
-  g->uvhead.u.l.prev = &g->uvhead;
-  g->uvhead.u.l.next = &g->uvhead;
   g->gcrunning = 0;  /* no GC while building state */
   g->GCestimate = 0;
-  g->strt.size = 0;
+  g->strt.size = g->strt.nuse = 0;
-  g->strt.nuse = 0;
   g->strt.hash = NULL;
   setnilvalue(&g->l_registry);
   luaZ_initbuffer(L, &g->buff);
   g->panic = NULL;
-  g->version = lua_version(NULL);
+  g->version = NULL;
   g->gcstate = GCSpause;
-  g->allgc = NULL;
+  g->gckind = KGC_NORMAL;
-  g->finobj = NULL;
+  g->allgc = g->finobj = g->tobefnz = g->fixedgc = NULL;
-  g->tobefnz = NULL;
+  g->sweepgc = NULL;
-  g->sweepgc = g->sweepfin = NULL;
   g->gray = g->grayagain = NULL;
   g->weak = g->ephemeron = g->allweak = NULL;
+  g->twups = NULL;
   g->totalbytes = sizeof(LG);
   g->GCdebt = 0;
+  g->gcfinnum = 0;
   g->gcpause = LUAI_GCPAUSE;
-  g->gcmajorinc = LUAI_GCMAJOR;
   g->gcstepmul = LUAI_GCMUL;
   for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
   if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
@@ -306,8 +332,6 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
     close_state(L);
     L = NULL;
   }
-  else
-    luai_userstateopen(L);
   return L;
 }
 
@@ -315,7 +339,6 @@ 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);
-  luai_userstateclose(L);
   close_state(L);
 }
 

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 2.81 2012/06/08 15:14:04 roberto Exp roberto $
+** $Id: lstate.h,v 2.116 2014/10/06 21:34:34 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -16,25 +16,16 @@
 
 /*
 
-** Some notes about garbage-collected objects:  All objects in Lua must
+** Some notes about garbage-collected objects: All objects in Lua must
-** be kept somehow accessible until being freed.
+** be kept somehow accessible until being freed, so all objects always
+** belong to one (and only one) of these lists, using field 'next' of
+** the 'CommonHeader' for the link:
 **
-** Lua keeps most objects linked in list g->allgc. The link uses field
+** allgc: all objects not marked for finalization;
-** 'next' of the CommonHeader.
+** finobj: all objects marked for finalization;
-**
+** tobefnz: all objects ready to be finalized; 
-** Strings are kept in several lists headed by the array g->strt.hash.
+** fixedgc: all objects that are not to be collected (currently
-**
+** only small strings, such as reserved words).
-** Open upvalues are not subject to independent garbage collection. They
-** are collected together with their respective threads. Lua keeps a
-** double-linked list with all open upvalues (g->uvhead) so that it can
-** mark objects referred by them. (They are always gray, so they must
-** be remarked in the atomic step. Usually their contents would be marked
-** when traversing the respective threads, but the thread may already be
-** dead, while the upvalue is still accessible through closures.)
-**
-** Objects with finalizers are kept in the list g->finobj.
-**
-** The list g->tobefnz links all objects being finalized.
 
 */
 
@@ -53,58 +44,63 @@ struct lua_longjmp;  /* defined in ldo.c */
 /* kinds of Garbage Collection */
 #define KGC_NORMAL	0
 #define KGC_EMERGENCY	1	/* gc was forced by an allocation failure */
-#define KGC_GEN		2	/* generational collection */
 
 
 typedef struct stringtable {
-  GCObject **hash;
+  TString **hash;
-  lu_int32 nuse;  /* number of elements */
+  int nuse;  /* number of elements */
   int size;
 } stringtable;
 
 
 /*
-** information about a call
+** Information about a call.
+** When a thread yields, 'func' is adjusted to pretend that the
+** top function has only the yielded values in its stack; in that
+** case, the actual 'func' value is saved in field 'extra'. 
+** When a function calls another with a continuation, 'extra' keeps
+** the function index so that, in case of errors, the continuation
+** function can be called with the correct top.
 */
 typedef struct CallInfo {
   StkId func;  /* function index in the stack */
   StkId	top;  /* top for this function */
   struct CallInfo *previous, *next;  /* dynamic call link */
-  short nresults;  /* expected number of results from this function */
-  lu_byte callstatus;
-  ptrdiff_t extra;
   union {
     struct {  /* only for Lua functions */
       StkId base;  /* base for this function */
       const Instruction *savedpc;
     } l;
     struct {  /* only for C functions */
-      int ctx;  /* context info. in case of yields */
+      lua_KFunction k;  /* continuation in case of yields */
-      lua_CFunction k;  /* continuation in case of yields */
       ptrdiff_t old_errfunc;
-      lu_byte old_allowhook;
+      lua_KContext ctx;  /* context info. in case of yields */
-      lu_byte status;
     } c;
   } u;
+  ptrdiff_t extra;
+  short nresults;  /* expected number of results from this function */
+  lu_byte callstatus;
 } CallInfo;
 
 
 /*
 ** Bits in CallInfo status
 */
-#define CIST_LUA	(1<<0)	/* call is running a Lua function */
+#define CIST_OAH	(1<<0)	/* original value of 'allowhook' */
-#define CIST_HOOKED	(1<<1)	/* call is running a debug hook */
+#define CIST_LUA	(1<<1)	/* call is running a Lua function */
-#define CIST_REENTRY	(1<<2)	/* call is running on same invocation of
+#define CIST_HOOKED	(1<<2)	/* call is running a debug hook */
+#define CIST_REENTRY	(1<<3)	/* call is running on same invocation of
                                    luaV_execute of previous call */
-#define CIST_YIELDED	(1<<3)	/* call reentered after suspension */
 #define CIST_YPCALL	(1<<4)	/* call is a yieldable protected call */
-#define CIST_STAT	(1<<5)	/* call has an error status (pcall) */
+#define CIST_TAIL	(1<<5)	/* call was tail called */
-#define CIST_TAIL	(1<<6)	/* call was tail called */
+#define CIST_HOOKYIELD	(1<<6)	/* last hook called yielded */
-#define CIST_HOOKYIELD	(1<<7)	/* last hook called yielded */
-
 
 #define isLua(ci)	((ci)->callstatus & CIST_LUA)
 
+/* assume that CIST_OAH has offset 0 and that 'v' is strictly 0/1 */
+#define setoah(st,v)	((st) = ((st) & ~CIST_OAH) | (v))
+#define getoah(st)	((st) & CIST_OAH)
+
 
 /*
 ** `global state', shared by all threads of this state
@@ -123,21 +119,20 @@ typedef struct global_State {
   lu_byte gcstate;  /* state of garbage collector */
   lu_byte gckind;  /* kind of GC running */
   lu_byte gcrunning;  /* true if GC is running */
-  int sweepstrgc;  /* position of sweep in `strt' */
   GCObject *allgc;  /* list of all collectable objects */
+  GCObject **sweepgc;  /* current position of sweep in list */
   GCObject *finobj;  /* list of collectable objects with finalizers */
-  GCObject **sweepgc;  /* current position of sweep in list 'allgc' */
-  GCObject **sweepfin;  /* current position of sweep in list 'finobj' */
   GCObject *gray;  /* list of gray objects */
   GCObject *grayagain;  /* list of objects to be traversed atomically */
   GCObject *weak;  /* list of tables with weak values */
   GCObject *ephemeron;  /* list of ephemeron tables (weak keys) */
   GCObject *allweak;  /* list of all-weak tables */
   GCObject *tobefnz;  /* list of userdata to be GC */
-  UpVal uvhead;  /* head of double-linked list of all open upvalues */
+  GCObject *fixedgc;  /* list of objects not to be collected */
+  struct lua_State *twups;  /* list of threads with open upvalues */
   Mbuffer buff;  /* temporary buffer for string concatenation */
+  unsigned int gcfinnum;  /* number of finalizers to call in each GC step */
   int gcpause;  /* size of pause between successive GCs */
-  int gcmajorinc;  /* pause between major collections (only in gen. mode) */
   int gcstepmul;  /* GC `granularity' */
   lua_CFunction panic;  /* to be called in unprotected errors */
   struct lua_State *mainthread;
@@ -160,19 +155,20 @@ struct lua_State {
   const Instruction *oldpc;  /* last pc traced */
   StkId stack_last;  /* last free slot in the stack */
   StkId stack;  /* stack base */
+  UpVal *openupval;  /* list of open upvalues in this stack */
+  GCObject *gclist;
+  struct lua_State *twups;  /* list of threads with open upvalues */
+  struct lua_longjmp *errorJmp;  /* current error recover point */
+  CallInfo base_ci;  /* CallInfo for first level (C calling Lua) */
+  lua_Hook hook;
+  ptrdiff_t errfunc;  /* current error handling function (stack index) */
   int stacksize;
+  int basehookcount;
+  int hookcount;
   unsigned short nny;  /* number of non-yieldable calls in stack */
   unsigned short nCcalls;  /* number of nested C calls */
   lu_byte hookmask;
   lu_byte allowhook;
-  int basehookcount;
-  int hookcount;
-  lua_Hook hook;
-  GCObject *openupval;  /* list of open upvalues in this stack */
-  GCObject *gclist;
-  struct lua_longjmp *errorJmp;  /* current error recover point */
-  ptrdiff_t errfunc;  /* current error handling function (stack index) */
-  CallInfo base_ci;  /* CallInfo for first level (C calling Lua) */
 };
 
 
@@ -180,39 +176,37 @@ struct lua_State {
 
 
 /*
-** Union of all collectable objects
+** Union of all collectable objects (only for conversions)
 */
-union GCObject {
+union GCUnion {
-  GCheader gch;  /* common header */
+  GCObject gc;  /* common header */
-  union TString ts;
+  struct TString ts;
-  union Udata u;
+  struct Udata u;
   union Closure cl;
   struct Table h;
   struct Proto p;
-  struct UpVal uv;
   struct lua_State th;  /* thread */
 };
 
 
-#define gch(o)		(&(o)->gch)
+#define cast_u(o)	cast(union GCUnion *, (o))
 
 /* macros to convert a GCObject into a specific value */
-#define rawgco2ts(o)  \
+#define gco2ts(o)  \
-	check_exp(novariant((o)->gch.tt) == LUA_TSTRING, &((o)->ts))
+	check_exp(novariant((o)->tt) == LUA_TSTRING, &((cast_u(o))->ts))
-#define gco2ts(o)	(&rawgco2ts(o)->tsv)
+#define gco2u(o)  check_exp((o)->tt == LUA_TUSERDATA, &((cast_u(o))->u))
-#define rawgco2u(o)	check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
+#define gco2lcl(o)  check_exp((o)->tt == LUA_TLCL, &((cast_u(o))->cl.l))
-#define gco2u(o)	(&rawgco2u(o)->uv)
+#define gco2ccl(o)  check_exp((o)->tt == LUA_TCCL, &((cast_u(o))->cl.c))
-#define gco2lcl(o)	check_exp((o)->gch.tt == LUA_TLCL, &((o)->cl.l))
-#define gco2ccl(o)	check_exp((o)->gch.tt == LUA_TCCL, &((o)->cl.c))
 #define gco2cl(o)  \
-	check_exp(novariant((o)->gch.tt) == LUA_TFUNCTION, &((o)->cl))
+	check_exp(novariant((o)->tt) == LUA_TFUNCTION, &((cast_u(o))->cl))
-#define gco2t(o)	check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
+#define gco2t(o)  check_exp((o)->tt == LUA_TTABLE, &((cast_u(o))->h))
-#define gco2p(o)	check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
+#define gco2p(o)  check_exp((o)->tt == LUA_TPROTO, &((cast_u(o))->p))
-#define gco2uv(o)	check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
+#define gco2th(o)  check_exp((o)->tt == LUA_TTHREAD, &((cast_u(o))->th))
-#define gco2th(o)	check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
 
-/* macro to convert any Lua object into a GCObject */
+
-#define obj2gco(v)	(cast(GCObject *, (v)))
+/* macro to convert a Lua object into a GCObject */
+#define obj2gco(v) \
+	check_exp(novariant((v)->tt) < LUA_TDEADKEY, (&(cast_u(v)->gc)))
 
 
 /* actual number of total bytes allocated */
@@ -222,6 +216,7 @@ LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
 LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
 LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
 LUAI_FUNC void luaE_freeCI (lua_State *L);
+LUAI_FUNC void luaE_shrinkCI (lua_State *L);
 
 
 #endif

lstring.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.c,v 2.25 2012/10/02 17:41:50 roberto Exp roberto $
+** $Id: lstring.c,v 2.43 2014/07/18 14:46:47 roberto Exp roberto $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,12 +12,15 @@
 
 #include "lua.h"
 
+#include "ldebug.h"
+#include "ldo.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
 
 
+
 /*
 ** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to
 ** compute its hash
@@ -31,23 +34,14 @@
 ** equality for long strings
 */
 int luaS_eqlngstr (TString *a, TString *b) {
-  size_t len = a->tsv.len;
+  size_t len = a->len;
-  lua_assert(a->tsv.tt == LUA_TLNGSTR && b->tsv.tt == LUA_TLNGSTR);
+  lua_assert(a->tt == LUA_TLNGSTR && b->tt == LUA_TLNGSTR);
   return (a == b) ||  /* same instance or... */
-    ((len == b->tsv.len) &&  /* equal length and ... */
+    ((len == b->len) &&  /* equal length and ... */
      (memcmp(getstr(a), getstr(b), len) == 0));  /* equal contents */
 }
 
 
-/*
-** equality for strings
-*/
-int luaS_eqstr (TString *a, TString *b) {
-  return (a->tsv.tt == b->tsv.tt) &&
-         (a->tsv.tt == LUA_TSHRSTR ? eqshrstr(a, b) : luaS_eqlngstr(a, b));
-}
-
-
 unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
   unsigned int h = seed ^ cast(unsigned int, l);
   size_t l1;
@@ -64,66 +58,59 @@ unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
 void luaS_resize (lua_State *L, int newsize) {
   int i;
   stringtable *tb = &G(L)->strt;
-  /* cannot resize while GC is traversing strings */
+  if (newsize > tb->size) {  /* grow table if needed */
-  luaC_runtilstate(L, ~bitmask(GCSsweepstring));
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
-  if (newsize > tb->size) {
+    for (i = tb->size; i < newsize; i++)
-    luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
+      tb->hash[i] = NULL;
-    for (i = tb->size; i < newsize; i++) tb->hash[i] = NULL;
   }
-  /* rehash */
+  for (i = 0; i < tb->size; i++) {  /* rehash */
-  for (i=0; i<tb->size; i++) {
+    TString *p = tb->hash[i];
-    GCObject *p = tb->hash[i];
     tb->hash[i] = NULL;
     while (p) {  /* for each node in the list */
-      GCObject *next = gch(p)->next;  /* save next */
+      TString *hnext = p->hnext;  /* save next */
-      unsigned int h = lmod(gco2ts(p)->hash, newsize);  /* new position */
+      unsigned int h = lmod(p->hash, newsize);  /* new position */
-      gch(p)->next = tb->hash[h];  /* chain it */
+      p->hnext = tb->hash[h];  /* chain it */
       tb->hash[h] = p;
-      resetoldbit(p);  /* see MOVE OLD rule */
+      p = hnext;
-      p = next;
     }
   }
-  if (newsize < tb->size) {
+  if (newsize < tb->size) {  /* shrink table if needed */
-    /* shrinking slice must be empty */
+    /* vanishing slice should be empty */
     lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL);
-    luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
+    luaM_reallocvector(L, tb->hash, tb->size, newsize, TString *);
   }
   tb->size = newsize;
 }
 
 
+
 /*
 ** creates a new string object
 */
 static TString *createstrobj (lua_State *L, const char *str, size_t l,
-                              int tag, unsigned int h, GCObject **list) {
+                              int tag, unsigned int h) {
   TString *ts;
+  GCObject *o;
   size_t totalsize;  /* total size of TString object */
-  totalsize = sizeof(TString) + ((l + 1) * sizeof(char));
+  totalsize = sizelstring(l);
-  ts = &luaC_newobj(L, tag, totalsize, list, 0)->ts;
+  o = luaC_newobj(L, tag, totalsize);
-  ts->tsv.len = l;
+  ts = gco2ts(o);
-  ts->tsv.hash = h;
+  ts->len = l;
-  ts->tsv.extra = 0;
+  ts->hash = h;
-  memcpy(ts+1, str, l*sizeof(char));
+  ts->extra = 0;
-  ((char *)(ts+1))[l] = '\0';  /* ending 0 */
+  memcpy(getaddrstr(ts), str, l * sizeof(char));
+  getaddrstr(ts)[l] = '\0';  /* ending 0 */
   return ts;
 }
 
 
-/*
+void luaS_remove (lua_State *L, TString *ts) {
-** creates a new short string, inserting it into string table
-*/
-static TString *newshrstr (lua_State *L, const char *str, size_t l,
-                                       unsigned int h) {
-  GCObject **list;  /* (pointer to) list where it will be inserted */
   stringtable *tb = &G(L)->strt;
-  TString *s;
+  TString **p = &tb->hash[lmod(ts->hash, tb->size)];
-  if (tb->nuse >= cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
+  while (*p != ts)  /* find previous element */
-    luaS_resize(L, tb->size*2);  /* too crowded */
+    p = &(*p)->hnext;
-  list = &tb->hash[lmod(h, tb->size)];
+  *p = (*p)->hnext;  /* remove element from its list */
-  s = createstrobj(L, str, l, LUA_TSHRSTR, h, list);
+  tb->nuse--;
-  tb->nuse++;
-  return s;
 }
 
 
@@ -131,22 +118,28 @@ static TString *newshrstr (lua_State *L, const char *str, size_t l,
 ** checks whether short string exists and reuses it or creates a new one
 */
 static TString *internshrstr (lua_State *L, const char *str, size_t l) {
-  GCObject *o;
+  TString *ts;
   global_State *g = G(L);
   unsigned int h = luaS_hash(str, l, g->seed);
-  for (o = g->strt.hash[lmod(h, g->strt.size)];
+  TString **list = &g->strt.hash[lmod(h, g->strt.size)];
-       o != NULL;
+  for (ts = *list; ts != NULL; ts = ts->hnext) {
-       o = gch(o)->next) {
+    if (l == ts->len &&
-    TString *ts = rawgco2ts(o);
-    if (h == ts->tsv.hash &&
-        l == ts->tsv.len &&
         (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
-      if (isdead(G(L), o))  /* string is dead (but was not collected yet)? */
+      /* found! */
-        changewhite(o);  /* resurrect it */
+      if (isdead(g, ts))  /* dead (but not collected yet)? */
+        changewhite(ts);  /* resurrect it */
       return ts;
     }
   }
-  return newshrstr(L, str, l, h);  /* not found; create a new string */
+  if (g->strt.nuse >= g->strt.size && g->strt.size <= MAX_INT/2) {
+    luaS_resize(L, g->strt.size * 2);
+    list = &g->strt.hash[lmod(h, g->strt.size)];  /* recompute with new size */
+  }
+  ts = createstrobj(L, str, l, LUA_TSHRSTR, h);
+  ts->hnext = *list;
+  *list = ts;
+  g->strt.nuse++;
+  return ts;
 }
 
 
@@ -157,9 +150,9 @@ TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
   if (l <= LUAI_MAXSHORTLEN)  /* short string? */
     return internshrstr(L, str, l);
   else {
-    if (l + 1 > (MAX_SIZET - sizeof(TString))/sizeof(char))
+    if (l + 1 > (MAX_SIZE - sizeof(TString))/sizeof(char))
       luaM_toobig(L);
-    return createstrobj(L, str, l, LUA_TLNGSTR, G(L)->seed, NULL);
+    return createstrobj(L, str, l, LUA_TLNGSTR, G(L)->seed);
   }
 }
 
@@ -172,14 +165,16 @@ TString *luaS_new (lua_State *L, const char *str) {
 }
 
 
-Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
+Udata *luaS_newudata (lua_State *L, size_t s) {
   Udata *u;
-  if (s > MAX_SIZET - sizeof(Udata))
+  GCObject *o;
+  if (s > MAX_SIZE - sizeof(Udata))
     luaM_toobig(L);
-  u = &luaC_newobj(L, LUA_TUSERDATA, sizeof(Udata) + s, NULL, 0)->u;
+  o = luaC_newobj(L, LUA_TUSERDATA, sizeludata(s));
-  u->uv.len = s;
+  u = gco2u(o);
-  u->uv.metatable = NULL;
+  u->len = s;
-  u->uv.env = e;
+  u->metatable = NULL;
+  setuservalue(L, u, luaO_nilobject);
   return u;
 }
 

lstring.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.h,v 1.48 2012/01/25 21:05:40 roberto Exp roberto $
+** $Id: lstring.h,v 1.54 2014/03/19 18:51:42 roberto Exp roberto $
 ** String table (keep all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,33 +12,33 @@
 #include "lstate.h"
 
 
-#define sizestring(s)	(sizeof(union TString)+((s)->len+1)*sizeof(char))
+#define sizelstring(l)  (sizeof(union UTString) + ((l) + 1) * sizeof(char))
+#define sizestring(s)	sizelstring((s)->len)
 
-#define sizeudata(u)	(sizeof(union Udata)+(u)->len)
+#define sizeludata(l)	(sizeof(union UUdata) + (l))
+#define sizeudata(u)	sizeludata((u)->len)
 
 #define luaS_newliteral(L, s)	(luaS_newlstr(L, "" s, \
                                  (sizeof(s)/sizeof(char))-1))
 
-#define luaS_fix(s)	l_setbit((s)->tsv.marked, FIXEDBIT)
-
 
 /*
 ** test whether a string is a reserved word
 */
-#define isreserved(s)	((s)->tsv.tt == LUA_TSHRSTR && (s)->tsv.extra > 0)
+#define isreserved(s)	((s)->tt == LUA_TSHRSTR && (s)->extra > 0)
 
 
 /*
 ** equality for short strings, which are always internalized
 */
-#define eqshrstr(a,b)	check_exp((a)->tsv.tt == LUA_TSHRSTR, (a) == (b))
+#define eqshrstr(a,b)	check_exp((a)->tt == LUA_TSHRSTR, (a) == (b))
 
 
 LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
 LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
-LUAI_FUNC int luaS_eqstr (TString *a, TString *b);
 LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
-LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e);
+LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
+LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s);
 LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
 LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
 

lstrlib.c

@@ -1,11 +1,12 @@
 /*
-** $Id: lstrlib.c,v 1.177 2012/07/31 17:48:42 roberto Exp roberto $
+** $Id: lstrlib.c,v 1.204 2014/10/17 16:28:21 roberto Exp roberto $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
 
 
 #include <ctype.h>
+#include <limits.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -43,22 +44,22 @@ 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) {
+static lua_Integer posrelat (lua_Integer pos, size_t len) {
-  if (pos >= 0) return (size_t)pos;
+  if (pos >= 0) return pos;
   else if (0u - (size_t)pos > len) return 0;
-  else return len - ((size_t)-pos) + 1;
+  else return (lua_Integer)len + pos + 1;
 }
 
 
 static int str_sub (lua_State *L) {
   size_t l;
   const char *s = luaL_checklstring(L, 1, &l);
-  size_t start = posrelat(luaL_checkinteger(L, 2), l);
+  lua_Integer start = posrelat(luaL_checkinteger(L, 2), l);
-  size_t end = posrelat(luaL_optinteger(L, 3, -1), l);
+  lua_Integer end = posrelat(luaL_optinteger(L, 3, -1), l);
   if (start < 1) start = 1;
-  if (end > l) end = l;
+  if (end > (lua_Integer)l) end = l;
   if (start <= end)
-    lua_pushlstring(L, s + start - 1, end - start + 1);
+    lua_pushlstring(L, s + start - 1, (size_t)(end - start + 1));
   else lua_pushliteral(L, "");
   return 1;
 }
@@ -102,25 +103,30 @@ static int str_upper (lua_State *L) {
 }
 
 
-/* reasonable limit to avoid arithmetic overflow */
+/* reasonable limit to avoid arithmetic overflow and strings too big */
-#define MAXSIZE		((~(size_t)0) >> 1)
+#if LUA_MAXINTEGER / 2 <= 0x10000000
+#define MAXSIZE		((size_t)(LUA_MAXINTEGER / 2))
+#else
+#define MAXSIZE		((size_t)0x10000000)
+#endif
 
 static int str_rep (lua_State *L) {
   size_t l, lsep;
   const char *s = luaL_checklstring(L, 1, &l);
-  int n = luaL_checkint(L, 2);
+  lua_Integer n = luaL_checkinteger(L, 2);
   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? */
+  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;
+    size_t totallen = (size_t)n * l + (size_t)(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;
-      if (lsep > 0) {  /* avoid empty 'memcpy' (may be expensive) */
+      if (lsep > 0) {  /* empty 'memcpy' is not that cheap */
-        memcpy(p, sep, lsep * sizeof(char)); p += lsep;
+        memcpy(p, sep, lsep * sizeof(char));
+        p += lsep;
       }
     }
     memcpy(p, s, l * sizeof(char));  /* last copy (not followed by separator) */
@@ -133,14 +139,14 @@ static int str_rep (lua_State *L) {
 static int str_byte (lua_State *L) {
   size_t l;
   const char *s = luaL_checklstring(L, 1, &l);
-  size_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
+  lua_Integer posi = posrelat(luaL_optinteger(L, 2, 1), l);
-  size_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
+  lua_Integer pose = posrelat(luaL_optinteger(L, 3, posi), l);
   int n, i;
   if (posi < 1) posi = 1;
-  if (pose > l) pose = l;
+  if (pose > (lua_Integer)l) pose = l;
   if (posi > pose) return 0;  /* empty interval; return no values */
   n = (int)(pose -  posi + 1);
-  if (posi + n <= pose)  /* (size_t -> int) overflow? */
+  if (posi + n <= pose)  /* arithmetic overflow? */
     return luaL_error(L, "string slice too long");
   luaL_checkstack(L, n, "string slice too long");
   for (i=0; i<n; i++)
@@ -155,7 +161,7 @@ static int str_char (lua_State *L) {
   luaL_Buffer b;
   char *p = luaL_buffinitsize(L, &b, n);
   for (i=1; i<=n; i++) {
-    int c = luaL_checkint(L, i);
+    lua_Integer c = luaL_checkinteger(L, i);
     luaL_argcheck(L, uchar(c) == c, i, "value out of range");
     p[i - 1] = uchar(c);
   }
@@ -164,19 +170,20 @@ static int str_char (lua_State *L) {
 }
 
 
-static int writer (lua_State *L, const void* b, size_t size, void* B) {
+static int writer (lua_State *L, const void *b, size_t size, void *B) {
   (void)L;
-  luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
+  luaL_addlstring((luaL_Buffer *) B, (const char *)b, size);
   return 0;
 }
 
 
 static int str_dump (lua_State *L) {
   luaL_Buffer b;
+  int strip = lua_toboolean(L, 2);
   luaL_checktype(L, 1, LUA_TFUNCTION);
   lua_settop(L, 1);
   luaL_buffinit(L,&b);
-  if (lua_dump(L, writer, &b) != 0)
+  if (lua_dump(L, writer, &b, strip) != 0)
     return luaL_error(L, "unable to dump given function");
   luaL_pushresult(&b);
   return 1;
@@ -243,14 +250,14 @@ static const char *classend (MatchState *ms, const char *p) {
   switch (*p++) {
     case L_ESC: {
       if (p == ms->p_end)
-        luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")");
+        luaL_error(ms->L, "malformed pattern (ends with '%%')");
       return p+1;
     }
     case '[': {
       if (*p == '^') p++;
       do {  /* look for a `]' */
         if (p == ms->p_end)
-          luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")");
+          luaL_error(ms->L, "malformed pattern (missing ']')");
         if (*(p++) == L_ESC && p < ms->p_end)
           p++;  /* skip escapes (e.g. `%]') */
       } while (*p != ']');
@@ -325,8 +332,7 @@ static int singlematch (MatchState *ms, const char *s, const char *p,
 static const char *matchbalance (MatchState *ms, const char *s,
                                    const char *p) {
   if (p >= ms->p_end - 1)
-    luaL_error(ms->L, "malformed pattern "
+    luaL_error(ms->L, "malformed pattern (missing arguments to '%%b')");
-                      "(missing arguments to " LUA_QL("%%b") ")");
   if (*s != *p) return NULL;
   else {
     int b = *p;
@@ -443,8 +449,7 @@ static const char *match (MatchState *ms, const char *s, const char *p) {
             const char *ep; char previous;
             p += 2;
             if (*p != '[')
-              luaL_error(ms->L, "missing " LUA_QL("[") " after "
+              luaL_error(ms->L, "missing '[' after '%%f' in pattern");
-                                 LUA_QL("%%f") " in pattern");
             ep = classend(ms, p);  /* points to what is next */
             previous = (s == ms->src_init) ? '\0' : *(s - 1);
             if (!matchbracketclass(uchar(previous), p, ep - 1) &&
@@ -578,16 +583,16 @@ static int str_find_aux (lua_State *L, int find) {
   size_t ls, lp;
   const char *s = luaL_checklstring(L, 1, &ls);
   const char *p = luaL_checklstring(L, 2, &lp);
-  size_t init = posrelat(luaL_optinteger(L, 3, 1), ls);
+  lua_Integer init = posrelat(luaL_optinteger(L, 3, 1), ls);
   if (init < 1) init = 1;
-  else if (init > ls + 1) {  /* start after string's end? */
+  else if (init > (lua_Integer)ls + 1) {  /* start after string's end? */
     lua_pushnil(L);  /* cannot find anything */
     return 1;
   }
   /* explicit request or no special characters? */
   if (find && (lua_toboolean(L, 4) || nospecials(p, lp))) {
     /* do a plain search */
-    const char *s2 = lmemfind(s + init - 1, ls - init + 1, p, lp);
+    const char *s2 = lmemfind(s + init - 1, ls - (size_t)init + 1, p, lp);
     if (s2) {
       lua_pushinteger(L, s2 - s + 1);
       lua_pushinteger(L, s2 - s + lp);
@@ -678,7 +683,8 @@ static int gmatch (lua_State *L) {
 static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
                                                    const char *e) {
   size_t l, i;
-  const char *news = lua_tolstring(ms->L, 3, &l);
+  lua_State *L = ms->L;
+  const char *news = lua_tolstring(L, 3, &l);
   for (i = 0; i < l; i++) {
     if (news[i] != L_ESC)
       luaL_addchar(b, news[i]);
@@ -686,14 +692,15 @@ static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
       i++;  /* skip ESC */
       if (!isdigit(uchar(news[i]))) {
         if (news[i] != L_ESC)
-          luaL_error(ms->L, "invalid use of " LUA_QL("%c")
+          luaL_error(L, "invalid use of '%c' in replacement string", L_ESC);
-                           " in replacement string", L_ESC);
         luaL_addchar(b, news[i]);
       }
       else if (news[i] == '0')
           luaL_addlstring(b, s, e - s);
       else {
         push_onecapture(ms, news[i] - '1', s, e);
+        luaL_tolstring(L, -1, NULL);  /* if number, convert it to string */
+        lua_remove(L, -2);  /* remove original value */
         luaL_addvalue(b);  /* add capture to accumulated result */
       }
     }
@@ -737,9 +744,9 @@ static int str_gsub (lua_State *L) {
   const char *src = luaL_checklstring(L, 1, &srcl);
   const char *p = luaL_checklstring(L, 2, &lp);
   int tr = lua_type(L, 3);
-  size_t max_s = luaL_optinteger(L, 4, srcl+1);
+  lua_Integer max_s = luaL_optinteger(L, 4, srcl + 1);
   int anchor = (*p == '^');
-  size_t n = 0;
+  lua_Integer n = 0;
   MatchState ms;
   luaL_Buffer b;
   luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
@@ -786,48 +793,17 @@ static int str_gsub (lua_State *L) {
 ** =======================================================
 */
 
-/*
-** LUA_INTFRMLEN is the length modifier for integer conversions in
-** 'string.format'; LUA_INTFRM_T is the integer type corresponding to
-** the previous length
-*/
-#if !defined(LUA_INTFRMLEN)	/* { */
-#if defined(LUA_USE_LONGLONG)
-
-#define LUA_INTFRMLEN		"ll"
-#define LUA_INTFRM_T		long long
-
-#else
-
-#define LUA_INTFRMLEN		"l"
-#define LUA_INTFRM_T		long
-
-#endif
-#endif				/* } */
-
-
-/*
-** LUA_FLTFRMLEN is the length modifier for float conversions in
-** 'string.format'; LUA_FLTFRM_T is the float type corresponding to
-** the previous length
-*/
-#if !defined(LUA_FLTFRMLEN)
-
-#define LUA_FLTFRMLEN		""
-#define LUA_FLTFRM_T		double
-
-#endif
-
-
 /* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
 #define MAX_ITEM	512
+
 /* valid flags in a format specification */
 #define FLAGS	"-+ #0"
+
 /*
-** maximum size of each format specification (such as '%-099.99d')
+** maximum size of each format specification (such as "%-099.99d")
-** (+10 accounts for %99.99x plus margin of error)
+** (+2 for length modifiers; +10 accounts for %99.99x plus margin of error)
 */
-#define MAX_FORMAT	(sizeof(FLAGS) + sizeof(LUA_INTFRMLEN) + 10)
+#define MAX_FORMAT	(sizeof(FLAGS) + 2 + 10)
 
 
 static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
@@ -911,27 +887,14 @@ static int str_format (lua_State *L) {
       strfrmt = scanformat(L, strfrmt, form);
       switch (*strfrmt++) {
         case 'c': {
-          nb = sprintf(buff, form, luaL_checkint(L, arg));
+          nb = sprintf(buff, form, (int)luaL_checkinteger(L, arg));
-          break;
-        }
-        case 'd': case 'i': {
-          lua_Number n = luaL_checknumber(L, arg);
-          LUA_INTFRM_T ni = (LUA_INTFRM_T)n;
-          lua_Number diff = n - (lua_Number)ni;
-          luaL_argcheck(L, -1 < diff && diff < 1, arg,
-                        "not a number in proper range");
-          addlenmod(form, LUA_INTFRMLEN);
-          nb = sprintf(buff, form, ni);
           break;
         }
+        case 'd': case 'i':
         case 'o': case 'u': case 'x': case 'X': {
-          lua_Number n = luaL_checknumber(L, arg);
+          lua_Integer n = luaL_checkinteger(L, arg);
-          unsigned LUA_INTFRM_T ni = (unsigned LUA_INTFRM_T)n;
+          addlenmod(form, LUA_INTEGER_FRMLEN);
-          lua_Number diff = n - (lua_Number)ni;
+          nb = sprintf(buff, form, n);
-          luaL_argcheck(L, -1 < diff && diff < 1, arg,
-                        "not a non-negative number in proper range");
-          addlenmod(form, LUA_INTFRMLEN);
-          nb = sprintf(buff, form, ni);
           break;
         }
         case 'e': case 'E': case 'f':
@@ -939,8 +902,8 @@ static int str_format (lua_State *L) {
         case 'a': case 'A':
 #endif
         case 'g': case 'G': {
-          addlenmod(form, LUA_FLTFRMLEN);
+          addlenmod(form, LUA_NUMBER_FRMLEN);
-          nb = sprintf(buff, form, (LUA_FLTFRM_T)luaL_checknumber(L, arg));
+          nb = sprintf(buff, form, luaL_checknumber(L, arg));
           break;
         }
         case 'q': {
@@ -963,8 +926,8 @@ static int str_format (lua_State *L) {
           }
         }
         default: {  /* also treat cases `pnLlh' */
-          return luaL_error(L, "invalid option " LUA_QL("%%%c") " to "
+          return luaL_error(L, "invalid option '%%%c' to 'format'",
-                               LUA_QL("format"), *(strfrmt - 1));
+                               *(strfrmt - 1));
         }
       }
       luaL_addsize(&b, nb);
@@ -977,6 +940,406 @@ static int str_format (lua_State *L) {
 /* }====================================================== */
 
 
+/*
+** {======================================================
+** PACK/UNPACK
+** =======================================================
+*/
+
+
+/* maximum size for the binary representation of an integer */
+#define MAXINTSIZE	16
+
+/* number of bits in a character */
+#define NB	CHAR_BIT
+
+/* mask for one character (NB 1's) */
+#define MC	((1 << NB) - 1)
+
+/* size of a lua_Integer */
+#define SZINT	((int)sizeof(lua_Integer))
+
+/* mask for all ones in last byte in a lua Integer */
+#define HIGHERBYTE	((lua_Unsigned)MC << (NB * (SZINT - 1)))
+
+
+/* dummy union to get native endianness */
+static const union {
+  int dummy;
+  char little;  /* true iff machine is little endian */
+} nativeendian = {1};
+
+
+/* dummy structure to get native alignment requirements */
+struct cD {
+  char c;
+  union { double d; void *p; lua_Integer i; lua_Number n; } u;
+};
+
+#define MAXALIGN	(offsetof(struct cD, u))
+
+
+/*
+** Union for serializing floats
+*/
+typedef union Ftypes {
+  float f;
+  double d;
+  lua_Number n;
+  char buff[5 * sizeof(lua_Number)];  /* enough for any float type */
+} Ftypes;
+
+
+/*
+** information to pack/unpack stuff
+*/
+typedef struct Header {
+  lua_State *L;
+  int islittle;
+  int maxalign;
+} Header;
+
+
+/*
+** options for pack/unpack
+*/
+typedef enum KOption {
+  Kint,		/* signed integers */
+  Kuint,	/* unsigned integers */
+  Kfloat,	/* floating-point numbers */
+  Kchar,	/* fixed-length strings */
+  Kstring,	/* strings with prefixed length */
+  Kzstr,	/* zero-terminated strings */
+  Kpadding,	/* padding */
+  Kpaddalign,	/* padding for alignment */
+  Knop,		/* no-op (configuration or spaces) */
+  Keof		/* end of format */
+} KOption;
+
+
+/*
+** Read an integer numeral from string 'fmt' or return 'df' if
+** there is no numeral
+*/
+static int digit (int c) { return '0' <= c && c <= '9'; }
+
+static int getnum (const char **fmt, int df) {
+  if (!digit(**fmt))  /* no number? */
+    return df;  /* return default value */
+  else {
+    int a = 0;
+    do {
+      a = a*10 + *((*fmt)++) - '0';
+    } while (digit(**fmt) && a < (INT_MAX/10 - 10));
+    return a;
+  }
+}
+
+
+/*
+** Read an integer numeral and raises an error if it is larger
+** than the maximum size for integers.
+*/
+static int getnumlimit (Header *h, const char **fmt, int df) {
+  int sz = getnum(fmt, df);
+  if (sz > MAXINTSIZE || sz <= 0)
+    luaL_error(h->L, "integral size (%d) out of limits [1,%d]", sz, MAXINTSIZE);
+  return sz;
+}
+
+
+/*
+** Initialize Header
+*/
+static void initheader (lua_State *L, Header *h) {
+  h->L = L;
+  h->islittle = nativeendian.little;
+  h->maxalign = 1;
+}
+
+
+/*
+** Read and classify next option. 'size' is filled with option's size.
+*/
+static KOption getoption (Header *h, const char **fmt, int *size) {
+  int opt = *((*fmt)++);
+  *size = 0;  /* default */
+  switch (opt) {
+    case 'b': *size = sizeof(char); return Kint;
+    case 'B': *size = sizeof(char); return Kuint;
+    case 'h': *size = sizeof(short); return Kint;
+    case 'H': *size = sizeof(short); return Kuint;
+    case 'l': *size = sizeof(long); return Kint;
+    case 'L': *size = sizeof(long); return Kuint;
+    case 'j': *size = sizeof(lua_Integer); return Kint;
+    case 'J': *size = sizeof(lua_Integer); return Kuint;
+    case 'T': *size = sizeof(size_t); return Kuint;
+    case 'f': *size = sizeof(float); return Kfloat;
+    case 'd': *size = sizeof(double); return Kfloat;
+    case 'n': *size = sizeof(lua_Number); return Kfloat;
+    case 'i': *size = getnumlimit(h, fmt, sizeof(int)); return Kint;
+    case 'I': *size = getnumlimit(h, fmt, sizeof(int)); return Kuint;
+    case 's': *size = getnumlimit(h, fmt, sizeof(size_t)); return Kstring;
+    case 'c': *size = getnum(fmt, 1); return Kchar;
+    case 'z': return Kzstr;
+    case 'x': *size = 1; return Kpadding;
+    case 'X': return Kpaddalign;
+    case ' ': return Knop;
+    case '\0': return Keof;
+    case '<': h->islittle = 1; return Knop;
+    case '>': h->islittle = 0; return Knop;
+    case '!': h->maxalign = getnumlimit(h, fmt, MAXALIGN); return Knop;
+    default: {
+      luaL_error(h->L, "invalid format option '%c'", opt);
+      return Knop;
+    }
+  }
+}
+
+
+/*
+** Read, classify, and fill other details about the next option.
+** 'psize' is filled with option's size, 'notoalign' with its
+** alignment requirements.
+** Local variable 'size' gets the size to be aligned. (Kpadal option
+** always gets its full alignment, other options are limited by 
+** the maximum alignment ('maxalign). Kchar option needs no aligment
+** despite its size.
+*/
+static KOption getdetails (Header *h, size_t totalsize,
+                           const char **fmt, int *psize, int *ntoalign) {
+  int align;
+  KOption opt;
+  do {
+    opt = getoption(h, fmt, psize);
+  } while (opt == Knop);  /* skip no-op options */
+  align = *psize;  /* usually, alignment follows size */
+  if (opt == Kpaddalign) {  /* 'X' gets alignment from following option */
+    if (getoption(h, fmt, &align) == Kchar || align == 0)
+      luaL_argerror(h->L, 1, "invalid next option for option 'X'");
+  }
+  if (align <= 1 || opt == Kchar)  /* need no alignment? */
+    *ntoalign = 0;
+  else {
+    if (align > h->maxalign)  /* enforce maximum alignment */
+      align = h->maxalign;
+    if ((align & (align - 1)) != 0)  /* is 'align' not a power of 2? */
+      luaL_argerror(h->L, 1, "format asks for alignment not power of 2");
+    *ntoalign = (align - (int)(totalsize & (align - 1))) & (align - 1);
+  }
+  return opt;
+}
+
+
+static void packint (luaL_Buffer *b, lua_Unsigned n,
+                     int islittle, int size, lua_Unsigned mask) {
+  char *buff = luaL_prepbuffsize(b, size);
+  int i;
+  for (i = 0; i < size - 1; i++) {
+    buff[islittle ? i : size - 1 - i] = (n & MC);
+    n = (n >> NB) | mask;
+  }
+  buff[islittle ? i : size - 1 - i] = (n & MC);
+  luaL_addsize(b, size);  /* add result to buffer */
+}
+
+
+/*
+** Copy 'size' bytes from 'src' to 'dest', correcting endianness if
+** given 'islittle' is different from native endianness.
+*/
+static void copywithendian (volatile char *dest, volatile const char *src,
+                            int size, int islittle) {
+  if (islittle == nativeendian.little) {
+    while (size-- != 0)
+      *(dest++) = *(src++);
+  }
+  else {
+    dest += size - 1;
+    while (size-- != 0)
+      *(dest--) = *(src++);
+  }
+}
+
+
+static int str_pack (lua_State *L) {
+  luaL_Buffer b;
+  Header h;
+  const char *fmt = luaL_checkstring(L, 1);  /* format string */
+  int arg = 1;  /* current argument to pack */
+  size_t totalsize = 0;  /* accumulate total size of result */
+  initheader(L, &h);
+  lua_pushnil(L);  /* mark to separate arguments from string buffer */
+  luaL_buffinit(L, &b);
+  for (;;) {
+    int size, ntoalign;
+    KOption opt = getdetails(&h, totalsize, &fmt, &size, &ntoalign);
+    totalsize += ntoalign + size;
+    while (ntoalign-- > 0) luaL_addchar(&b, '\0');  /* fill alignment */
+    arg++;
+    switch (opt) {
+      case Kint: {  /* signed integers */
+        lua_Integer n = luaL_checkinteger(L, arg);
+        lua_Unsigned mask = (n < 0) ? HIGHERBYTE : 0;  /*  sign extension */
+        if (size < SZINT) {  /* need overflow check? */
+          lua_Integer lim = (lua_Integer)1 << ((size * NB) - 1);
+          luaL_argcheck(L, -lim <= n && n < lim, arg, "integer overflow");
+        }
+        packint(&b, (lua_Unsigned)n, h.islittle, size, mask);
+        break;
+      }
+      case Kuint: {  /* unsigned integers */
+        lua_Integer n = luaL_checkinteger(L, arg);
+        if (size < SZINT)  /* need overflow check? */
+          luaL_argcheck(L, (lua_Unsigned)n < ((lua_Unsigned)1 << (size * NB)),
+                           arg, "unsigned overflow");
+        packint(&b, (lua_Unsigned)n, h.islittle, size, 0);
+        break;
+      }
+      case Kfloat: {  /* floating-point options */
+        volatile Ftypes u;
+        char *buff = luaL_prepbuffsize(&b, size);
+        lua_Number n = luaL_checknumber(L, arg);  /* get argument */
+        if (size == sizeof(u.f)) u.f = (float)n;  /* copy it into 'u' */
+        else if (size == sizeof(u.d)) u.d = (double)n;
+        else u.n = n;
+        /* move 'u' to final result, correcting endianness if needed */
+        copywithendian(buff, u.buff, size, h.islittle);
+        luaL_addsize(&b, size);
+        break;
+      }
+      case Kchar: {  /* fixed-size string */
+        size_t len;
+        const char *s = luaL_checklstring(L, arg, &len);
+        luaL_argcheck(L, len == (size_t)size, arg, "wrong length");
+        luaL_addlstring(&b, s, size);
+        break;
+      }
+      case Kstring: {  /* strings with length count */
+        size_t len;
+        const char *s = luaL_checklstring(L, arg, &len);
+        luaL_argcheck(L, size >= (int)sizeof(size_t) ||
+                         len < ((size_t)1 << (size * NB)),
+                         arg, "string length does not fit in given size");
+        packint(&b, (lua_Unsigned)len, h.islittle, size, 0);  /* pack length */
+        luaL_addlstring(&b, s, len);
+        totalsize += len;
+        break;
+      }
+      case Kzstr: {  /* zero-terminated string */
+        size_t len;
+        const char *s = luaL_checklstring(L, arg, &len);
+        luaL_argcheck(L, strlen(s) == len, arg, "string contains zeros");
+        luaL_addlstring(&b, s, len);
+        luaL_addchar(&b, '\0');  /* add zero at the end */
+        totalsize += len + 1;
+        break;
+      }
+      case Kpadding: luaL_addchar(&b, '\0');  /* go through */
+      case Kpaddalign: case Knop:
+        arg--;  /* undo increment */
+        break;
+      case Keof:  /* end of format */
+        luaL_pushresult(&b);
+        return 1;
+    }
+  }
+}
+
+
+static lua_Integer unpackint (lua_State *L, const char *str,
+                              int islittle, int size, int issigned) {
+  lua_Unsigned res = 0;
+  int i;
+  int limit = (size  <= SZINT) ? size : SZINT;
+  for (i = limit - 1; i >= 0; i--) {
+    res <<= NB;
+    res |= (lua_Unsigned)(unsigned char)str[islittle ? i : size - 1 - i];
+  }
+  if (size < SZINT) {  /* real size smaller than lua_Integer? */
+    if (issigned) {  /* needs sign extension? */
+      lua_Unsigned mask = (lua_Unsigned)1 << (size*NB - 1);
+      res = ((res ^ mask) - mask);  /* do sign extension */
+    }
+  }
+  else {  /* must check unread bytes */
+    int mask = (!issigned || (lua_Integer)res >= 0) ? 0 : MC;
+    for (i = limit; i < size; i++) {
+      if ((unsigned char)str[islittle ? i : size - 1 - i] != mask)
+        luaL_error(L, "%d-bit integer does not fit into Lua Integer", size);
+    }
+  }
+  return (lua_Integer)res;
+}
+
+
+static int str_unpack (lua_State *L) {
+  Header h;
+  const char *fmt = luaL_checkstring(L, 1);
+  size_t ld;
+  const char *data = luaL_checklstring(L, 2, &ld);
+  size_t pos = (size_t)posrelat(luaL_optinteger(L, 3, 1), ld) - 1;
+  int n = 0;  /* number of results */
+  luaL_argcheck(L, pos <= ld, 3, "initial position out of string");
+  initheader(L, &h);
+  for (;;) {
+    int size, ntoalign;
+    KOption opt = getdetails(&h, pos, &fmt, &size, &ntoalign);
+    if ((size_t)ntoalign + size > ~pos || pos + ntoalign + size > ld)
+      luaL_argerror(L, 2, "data string too short");
+    pos += ntoalign;
+    /* stack space for item + next position */
+    luaL_checkstack(L, 2, "too many results");
+    n++;
+    switch (opt) {
+      case Kint:
+      case Kuint: {
+        lua_Integer res = unpackint(L, data + pos, h.islittle, size,
+                                       (opt == Kint));
+        lua_pushinteger(L, res);
+        break;
+      }
+      case Kfloat: {
+        volatile Ftypes u;
+        lua_Number num;
+        copywithendian(u.buff, data + pos, size, h.islittle);
+        if (size == sizeof(u.f)) num = (lua_Number)u.f;
+        else if (size == sizeof(u.d)) num = (lua_Number)u.d;
+        else num = u.n;
+        lua_pushnumber(L, num);
+        break;
+      }
+      case Kchar: {
+        lua_pushlstring(L, data + pos, size);
+        break;
+      }
+      case Kstring: {
+        size_t len = (size_t)unpackint(L, data + pos, h.islittle, size, 0);
+        luaL_argcheck(L, pos + len + size <= ld, 2, "data string too short");
+        lua_pushlstring(L, data + pos + size, len);
+        pos += len;
+        break;
+      }
+      case Kzstr: {
+        size_t len = (int)strlen(data + pos);
+        lua_pushlstring(L, data + pos, len);
+        pos += len + 1;  /* skip final '\0' */
+        break;
+      }
+      case Kpaddalign: case Kpadding: case Knop:
+        n--;  /* undo increment */
+        break;
+      case Keof:  /* end of format */
+        lua_pushinteger(L, pos + 1);  /* next position */
+        return n;
+    }
+    pos += size;
+  }
+}
+
+/* }====================================================== */
+
+
 static const luaL_Reg strlib[] = {
   {"byte", str_byte},
   {"char", str_char},
@@ -992,6 +1355,8 @@ static const luaL_Reg strlib[] = {
   {"reverse", str_reverse},
   {"sub", str_sub},
   {"upper", str_upper},
+  {"pack", str_pack},
+  {"unpack", str_unpack},
   {NULL, NULL}
 };
 

ltable.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 2.71 2012/05/23 15:37:09 roberto Exp roberto $
+** $Id: ltable.c,v 2.95 2014/09/04 18:15:29 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -18,7 +18,10 @@
 ** Hence even when the load factor reaches 100%, performance remains good.
 */
 
+#include <float.h>
+#include <math.h>
 #include <string.h>
+#include <limits.h>
 
 #define ltable_c
 #define LUA_CORE
@@ -37,21 +40,26 @@
 
 
 /*
-** max size of array part is 2^MAXBITS
+** Maximum size of array part (MAXASIZE) is 2^MAXABITS. MAXABITS is
+** the largest integer such that MAXASIZE fits in an unsigned int.
 */
-#if LUAI_BITSINT >= 32
+#define MAXABITS	cast_int(sizeof(int) * CHAR_BIT - 1)
-#define MAXBITS		30
+#define MAXASIZE	(1u << MAXABITS)
-#else
-#define MAXBITS		(LUAI_BITSINT-2)
-#endif
 
-#define MAXASIZE	(1 << MAXBITS)
+/*
+** Maximum size of hash part is 2^MAXHBITS. MAXHBITS is the largest
+** integer such that 2^MAXHBITS fits in a signed int. (Note that the
+** maximum number of elements in a table, 2^MAXABITS + 2^MAXHBITS, still
+** fits comfortably in an unsigned int.)
+*/
+#define MAXHBITS	(MAXABITS - 1)
 
 
 #define hashpow2(t,n)		(gnode(t, lmod((n), sizenode(t))))
 
-#define hashstr(t,str)		hashpow2(t, (str)->tsv.hash)
+#define hashstr(t,str)		hashpow2(t, (str)->hash)
 #define hashboolean(t,p)	hashpow2(t, p)
+#define hashint(t,i)		hashpow2(t, i)
 
 
 /*
@@ -61,7 +69,7 @@
 #define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))
 
 
-#define hashpointer(t,p)	hashmod(t, IntPoint(p))
+#define hashpointer(t,p)	hashmod(t, point2int(p))
 
 
 #define dummynode		(&dummynode_)
@@ -70,16 +78,28 @@
 
 static const Node dummynode_ = {
   {NILCONSTANT},  /* value */
-  {{NILCONSTANT, NULL}}  /* key */
+  {{NILCONSTANT, 0}}  /* key */
 };
 
 
 /*
-** hash for lua_Numbers
+** Checks whether a float has a value representable as a lua_Integer
+** (and does the conversion if so)
 */
-static Node *hashnum (const Table *t, lua_Number n) {
+static int numisinteger (lua_Number x, lua_Integer *p) {
+  if ((x) == l_floor(x))  /* integral value? */
+    return lua_numtointeger(x, p);  /* try as an integer */
+  else return 0;
+}
+
+
+/*
+** hash for floating-point numbers
+*/
+static Node *hashfloat (const Table *t, lua_Number n) {
   int i;
-  luai_hashnum(i, n);
+  n = l_mathop(frexp)(n, &i) * cast_num(INT_MAX - DBL_MAX_EXP);
+  i += cast_int(n);
   if (i < 0) {
     if (cast(unsigned int, i) == 0u - i)  /* use unsigned to avoid overflows */
       i = 0;  /* handle INT_MIN */
@@ -96,18 +116,20 @@ static Node *hashnum (const Table *t, lua_Number n) {
 */
 static Node *mainposition (const Table *t, const TValue *key) {
   switch (ttype(key)) {
-    case LUA_TNUMBER:
+    case LUA_TNUMINT:
-      return hashnum(t, nvalue(key));
+      return hashint(t, ivalue(key));
-    case LUA_TLNGSTR: {
+    case LUA_TNUMFLT:
-      TString *s = rawtsvalue(key);
+      return hashfloat(t, fltvalue(key));
-      if (s->tsv.extra == 0) {  /* no hash? */
-        s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
-        s->tsv.extra = 1;  /* now it has its hash */
-      }
-      return hashstr(t, rawtsvalue(key));
-    }
     case LUA_TSHRSTR:
-      return hashstr(t, rawtsvalue(key));
+      return hashstr(t, tsvalue(key));
+    case LUA_TLNGSTR: {
+      TString *s = tsvalue(key);
+      if (s->extra == 0) {  /* no hash? */
+        s->hash = luaS_hash(getstr(s), s->len, s->hash);
+        s->extra = 1;  /* now it has its hash */
+      }
+      return hashstr(t, tsvalue(key));
+    }
     case LUA_TBOOLEAN:
       return hashboolean(t, bvalue(key));
     case LUA_TLIGHTUSERDATA:
@@ -122,32 +144,31 @@ static Node *mainposition (const Table *t, const TValue *key) {
 
 /*
 ** returns the index for `key' if `key' is an appropriate key to live in
-** the array part of the table, -1 otherwise.
+** the array part of the table, 0 otherwise.
 */
-static int arrayindex (const TValue *key) {
+static unsigned int arrayindex (const TValue *key) {
-  if (ttisnumber(key)) {
+  if (ttisinteger(key)) {
-    lua_Number n = nvalue(key);
+    lua_Integer k = ivalue(key);
-    int k;
+    if (0 < k && (lua_Unsigned)k <= MAXASIZE)
-    lua_number2int(k, n);
+      return cast(unsigned int, k);  /* 'key' is an appropriate array index */
-    if (luai_numeq(cast_num(k), n))
-      return k;
   }
-  return -1;  /* `key' did not match some condition */
+  return 0;  /* `key' did not match some condition */
 }
 
 
 /*
 ** returns the index of a `key' for table traversals. First goes all
 ** elements in the array part, then elements in the hash part. The
-** beginning of a traversal is signaled by -1.
+** beginning of a traversal is signaled by 0.
 */
-static int findindex (lua_State *L, Table *t, StkId key) {
+static unsigned int findindex (lua_State *L, Table *t, StkId key) {
-  int i;
+  unsigned int i;
-  if (ttisnil(key)) return -1;  /* first iteration */
+  if (ttisnil(key)) return 0;  /* first iteration */
   i = arrayindex(key);
-  if (0 < i && i <= t->sizearray)  /* is `key' inside array part? */
+  if (i != 0 && i <= t->sizearray)  /* is `key' inside array part? */
-    return i-1;  /* yes; that's the index (corrected to C) */
+    return i;  /* yes; that's the index */
   else {
+    int nx;
     Node *n = mainposition(t, key);
     for (;;) {  /* check whether `key' is somewhere in the chain */
       /* key may be dead already, but it is ok to use it in `next' */
@@ -156,26 +177,27 @@ static int findindex (lua_State *L, Table *t, StkId 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;
+        return (i + 1) + t->sizearray;
       }
-      else n = gnext(n);
+      nx = gnext(n);
-      if (n == NULL)
+      if (nx == 0)
-        luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
+        luaG_runerror(L, "invalid key to 'next'");  /* key not found */
+      else n += nx;
     }
   }
 }
 
 
 int luaH_next (lua_State *L, Table *t, StkId key) {
-  int i = findindex(L, t, key);  /* find original element */
+  unsigned int i = findindex(L, t, key);  /* find original element */
-  for (i++; i < t->sizearray; i++) {  /* try first array part */
+  for (; i < t->sizearray; i++) {  /* try first array part */
     if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
-      setnvalue(key, cast_num(i+1));
+      setivalue(key, i + 1);
       setobj2s(L, key+1, &t->array[i]);
       return 1;
     }
   }
-  for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */
+  for (i -= t->sizearray; cast_int(i) < sizenode(t); i++) {  /* hash part */
     if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */
       setobj2s(L, key, gkey(gnode(t, i)));
       setobj2s(L, key+1, gval(gnode(t, i)));
@@ -192,19 +214,24 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
 ** ==============================================================
 */
 
-
+/*
-static int computesizes (int nums[], int *narray) {
+** Compute the optimal size for the array part of table 't'. 'nums' is a
+** "count array" where 'nums[i]' is the number of integers in the table
+** between 2^(i - 1) + 1 and 2^i. Put in '*narray' the optimal size, and
+** return the number of elements that will go to that part.
+*/
+static unsigned int computesizes (unsigned int nums[], unsigned int *narray) {
   int i;
-  int twotoi;  /* 2^i */
+  unsigned int twotoi;  /* 2^i */
-  int a = 0;  /* number of elements smaller than 2^i */
+  unsigned int a = 0;  /* number of elements smaller than 2^i */
-  int na = 0;  /* number of elements to go to array part */
+  unsigned int na = 0;  /* number of elements to go to array part */
-  int n = 0;  /* optimal size for array part */
+  unsigned int n = 0;  /* optimal size for array part */
   for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
     if (nums[i] > 0) {
       a += nums[i];
       if (a > twotoi/2) {  /* more than half elements present? */
         n = twotoi;  /* optimal size (till now) */
-        na = a;  /* all elements smaller than n will go to array part */
+        na = a;  /* all elements up to 'n' will go to array part */
       }
     }
     if (a == *narray) break;  /* all elements already counted */
@@ -215,9 +242,9 @@ static int computesizes (int nums[], int *narray) {
 }
 
 
-static int countint (const TValue *key, int *nums) {
+static int countint (const TValue *key, unsigned int *nums) {
-  int k = arrayindex(key);
+  unsigned int k = arrayindex(key);
-  if (0 < k && k <= MAXASIZE) {  /* is `key' an appropriate array index? */
+  if (k != 0) {  /* is `key' an appropriate array index? */
     nums[luaO_ceillog2(k)]++;  /* count as such */
     return 1;
   }
@@ -226,20 +253,21 @@ static int countint (const TValue *key, int *nums) {
 }
 
 
-static int numusearray (const Table *t, int *nums) {
+static unsigned int numusearray (const Table *t, unsigned int *nums) {
   int lg;
-  int ttlg;  /* 2^lg */
+  unsigned int ttlg;  /* 2^lg */
-  int ause = 0;  /* summation of `nums' */
+  unsigned int ause = 0;  /* summation of `nums' */
-  int i = 1;  /* count to traverse all array keys */
+  unsigned int i = 1;  /* count to traverse all array keys */
-  for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) {  /* for each slice */
+  /* traverse each slice */
-    int lc = 0;  /* counter */
+  for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) {
-    int lim = ttlg;
+    unsigned int lc = 0;  /* counter */
+    unsigned int lim = ttlg;
     if (lim > t->sizearray) {
       lim = t->sizearray;  /* adjust upper limit */
       if (i > lim)
         break;  /* no more elements to count */
     }
-    /* count elements in range (2^(lg-1), 2^lg] */
+    /* count elements in range (2^(lg - 1), 2^lg] */
     for (; i <= lim; i++) {
       if (!ttisnil(&t->array[i-1]))
         lc++;
@@ -251,9 +279,10 @@ static int numusearray (const Table *t, int *nums) {
 }
 
 
-static int numusehash (const Table *t, int *nums, int *pnasize) {
+static int numusehash (const Table *t, unsigned int *nums,
+                       unsigned int *pnasize) {
   int totaluse = 0;  /* total number of elements */
-  int ause = 0;  /* summation of `nums' */
+  int ause = 0;  /* elements added to 'nums' (can go to array part) */
   int i = sizenode(t);
   while (i--) {
     Node *n = &t->node[i];
@@ -267,8 +296,8 @@ static int numusehash (const Table *t, int *nums, int *pnasize) {
 }
 
 
-static void setarrayvector (lua_State *L, Table *t, int size) {
+static void setarrayvector (lua_State *L, Table *t, unsigned int size) {
-  int i;
+  unsigned int i;
   luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
   for (i=t->sizearray; i<size; i++)
      setnilvalue(&t->array[i]);
@@ -276,7 +305,7 @@ static void setarrayvector (lua_State *L, Table *t, int size) {
 }
 
 
-static void setnodevector (lua_State *L, Table *t, int size) {
+static void setnodevector (lua_State *L, Table *t, unsigned int size) {
   int lsize;
   if (size == 0) {  /* no elements to hash part? */
     t->node = cast(Node *, dummynode);  /* use common `dummynode' */
@@ -285,14 +314,14 @@ static void setnodevector (lua_State *L, Table *t, int size) {
   else {
     int i;
     lsize = luaO_ceillog2(size);
-    if (lsize > MAXBITS)
+    if (lsize > MAXHBITS)
       luaG_runerror(L, "table overflow");
     size = twoto(lsize);
     t->node = luaM_newvector(L, size, Node);
-    for (i=0; i<size; i++) {
+    for (i = 0; i < (int)size; i++) {
       Node *n = gnode(t, i);
-      gnext(n) = NULL;
+      gnext(n) = 0;
-      setnilvalue(gkey(n));
+      setnilvalue(wgkey(n));
       setnilvalue(gval(n));
     }
   }
@@ -301,9 +330,11 @@ static void setnodevector (lua_State *L, Table *t, int size) {
 }
 
 
-void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
+void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
-  int i;
+                                          unsigned int nhsize) {
-  int oldasize = t->sizearray;
+  unsigned int i;
+  int j;
+  unsigned int oldasize = t->sizearray;
   int oldhsize = t->lsizenode;
   Node *nold = t->node;  /* save old hash ... */
   if (nasize > oldasize)  /* array part must grow? */
@@ -321,8 +352,8 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
     luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
   }
   /* re-insert elements from hash part */
-  for (i = twoto(oldhsize) - 1; i >= 0; i--) {
+  for (j = twoto(oldhsize) - 1; j >= 0; j--) {
-    Node *old = nold+i;
+    Node *old = nold + j;
     if (!ttisnil(gval(old))) {
       /* doesn't need barrier/invalidate cache, as entry was
          already present in the table */
@@ -334,18 +365,20 @@ void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
 }
 
 
-void luaH_resizearray (lua_State *L, Table *t, int nasize) {
+void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
   int nsize = isdummy(t->node) ? 0 : sizenode(t);
   luaH_resize(L, t, nasize, nsize);
 }
 
-
+/*
+** nums[i] = number of keys 'k' where 2^(i - 1) < k <= 2^i
+*/
 static void rehash (lua_State *L, Table *t, const TValue *ek) {
-  int nasize, na;
+  unsigned int nasize, na;
-  int nums[MAXBITS+1];  /* nums[i] = number of keys with 2^(i-1) < k <= 2^i */
+  unsigned int nums[MAXABITS + 1];
   int i;
   int totaluse;
-  for (i=0; i<=MAXBITS; i++) nums[i] = 0;  /* reset counts */
+  for (i = 0; i <= MAXABITS; i++) nums[i] = 0;  /* reset counts */
   nasize = numusearray(t, nums);  /* count keys in array part */
   totaluse = nasize;  /* all those keys are integer keys */
   totaluse += numusehash(t, nums, &nasize);  /* count keys in hash part */
@@ -366,7 +399,8 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
 
 
 Table *luaH_new (lua_State *L) {
-  Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h;
+  GCObject *o = luaC_newobj(L, LUA_TTABLE, sizeof(Table));
+  Table *t = gco2t(o);
   t->metatable = NULL;
   t->flags = cast_byte(~0);
   t->array = NULL;
@@ -404,37 +438,52 @@ static Node *getfreepos (Table *t) {
 */
 TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
   Node *mp;
+  TValue aux;
   if (ttisnil(key)) luaG_runerror(L, "table index is nil");
-  else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
+  else if (ttisfloat(key)) {
-    luaG_runerror(L, "table index is NaN");
+    lua_Number n = fltvalue(key);
+    lua_Integer k;
+    if (luai_numisnan(n))
+      luaG_runerror(L, "table index is NaN");
+    if (numisinteger(n, &k)) {  /* index is int? */
+      setivalue(&aux, k);
+      key = &aux;  /* insert it as an integer */
+    }
+  }
   mp = mainposition(t, key);
   if (!ttisnil(gval(mp)) || isdummy(mp)) {  /* main position is taken? */
     Node *othern;
-    Node *n = getfreepos(t);  /* get a free place */
+    Node *f = getfreepos(t);  /* get a free place */
-    if (n == NULL) {  /* cannot find a free place? */
+    if (f == NULL) {  /* cannot find a free place? */
       rehash(L, t, key);  /* grow table */
-      /* whatever called 'newkey' take care of TM cache and GC barrier */
+      /* whatever called 'newkey' takes care of TM cache and GC barrier */
       return luaH_set(L, t, key);  /* insert key into grown table */
     }
-    lua_assert(!isdummy(n));
+    lua_assert(!isdummy(f));
     othern = mainposition(t, gkey(mp));
     if (othern != mp) {  /* is colliding node out of its main position? */
       /* yes; move colliding node into free position */
-      while (gnext(othern) != mp) othern = gnext(othern);  /* find previous */
+      while (othern + gnext(othern) != mp)  /* find previous */
-      gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
+        othern += gnext(othern);
-      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      gnext(othern) = cast_int(f - othern);  /* rechain to point to 'f' */
-      gnext(mp) = NULL;  /* now `mp' is free */
+      *f = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      if (gnext(mp) != 0) {
+        gnext(f) += cast_int(mp - f);  /* correct 'next' */
+        gnext(mp) = 0;  /* now 'mp' is free */
+      }
       setnilvalue(gval(mp));
     }
     else {  /* colliding node is in its own main position */
       /* new node will go into free position */
-      gnext(n) = gnext(mp);  /* chain new position */
+      if (gnext(mp) != 0)
-      gnext(mp) = n;
+        gnext(f) = cast_int((mp + gnext(mp)) - f);  /* chain new position */
-      mp = n;
+      else lua_assert(gnext(f) == 0);
+      gnext(mp) = cast_int(f - mp);
+      mp = f;
     }
   }
-  setobj2t(L, gkey(mp), key);
+  setkey(L, &mp->i_key, key);
-  luaC_barrierback(L, obj2gco(t), key);
+  luaC_barrierback(L, t, key);
   lua_assert(ttisnil(gval(mp)));
   return gval(mp);
 }
@@ -443,18 +492,21 @@ TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
 /*
 ** search function for integers
 */
-const TValue *luaH_getint (Table *t, int key) {
+const TValue *luaH_getint (Table *t, lua_Integer key) {
   /* (1 <= key && key <= t->sizearray) */
-  if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
+  if (l_castS2U(key - 1) < t->sizearray)
-    return &t->array[key-1];
+    return &t->array[key - 1];
   else {
-    lua_Number nk = cast_num(key);
+    Node *n = hashint(t, key);
-    Node *n = hashnum(t, nk);
+    for (;;) {  /* check whether `key' is somewhere in the chain */
-    do {  /* check whether `key' is somewhere in the chain */
+      if (ttisinteger(gkey(n)) && ivalue(gkey(n)) == key)
-      if (ttisnumber(gkey(n)) && luai_numeq(nvalue(gkey(n)), nk))
         return gval(n);  /* that's it */
-      else n = gnext(n);
+      else {
-    } while (n);
+        int nx = gnext(n);
+        if (nx == 0) break;
+        n += nx;
+      }
+    };
     return luaO_nilobject;
   }
 }
@@ -465,12 +517,17 @@ const TValue *luaH_getint (Table *t, int key) {
 */
 const TValue *luaH_getstr (Table *t, TString *key) {
   Node *n = hashstr(t, key);
-  lua_assert(key->tsv.tt == LUA_TSHRSTR);
+  lua_assert(key->tt == LUA_TSHRSTR);
-  do {  /* check whether `key' is somewhere in the chain */
+  for (;;) {  /* check whether `key' is somewhere in the chain */
-    if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key))
+    const TValue *k = gkey(n);
+    if (ttisshrstring(k) && eqshrstr(tsvalue(k), key))
       return gval(n);  /* that's it */
-    else n = gnext(n);
+    else {
-  } while (n);
+      int nx = gnext(n);
+      if (nx == 0) break;
+      n += nx;
+    }
+  };
   return luaO_nilobject;
 }
 
@@ -480,23 +537,26 @@ const TValue *luaH_getstr (Table *t, TString *key) {
 */
 const TValue *luaH_get (Table *t, const TValue *key) {
   switch (ttype(key)) {
-    case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key));
+    case LUA_TSHRSTR: return luaH_getstr(t, tsvalue(key));
+    case LUA_TNUMINT: return luaH_getint(t, ivalue(key));
     case LUA_TNIL: return luaO_nilobject;
-    case LUA_TNUMBER: {
+    case LUA_TNUMFLT: {
-      int k;
+      lua_Integer k;
-      lua_Number n = nvalue(key);
+      if (numisinteger(fltvalue(key), &k)) /* index is int? */
-      lua_number2int(k, n);
-      if (luai_numeq(cast_num(k), n)) /* index is int? */
         return luaH_getint(t, k);  /* use specialized version */
       /* else go through */
     }
     default: {
       Node *n = mainposition(t, key);
-      do {  /* check whether `key' is somewhere in the chain */
+      for (;;) {  /* check whether `key' is somewhere in the chain */
         if (luaV_rawequalobj(gkey(n), key))
           return gval(n);  /* that's it */
-        else n = gnext(n);
+        else {
-      } while (n);
+          int nx = gnext(n);
+          if (nx == 0) break;
+          n += nx;
+        }
+      };
       return luaO_nilobject;
     }
   }
@@ -515,14 +575,14 @@ TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
 }
 
 
-void luaH_setint (lua_State *L, Table *t, int key, TValue *value) {
+void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
   const TValue *p = luaH_getint(t, key);
   TValue *cell;
   if (p != luaO_nilobject)
     cell = cast(TValue *, p);
   else {
     TValue k;
-    setnvalue(&k, cast_num(key));
+    setivalue(&k, key);
     cell = luaH_newkey(L, t, &k);
   }
   setobj2t(L, cell, value);
@@ -535,13 +595,13 @@ static int unbound_search (Table *t, unsigned int j) {
   /* find `i' and `j' such that i is present and j is not */
   while (!ttisnil(luaH_getint(t, j))) {
     i = j;
-    j *= 2;
+    if (j > cast(unsigned int, MAX_INT)/2) {  /* overflow? */
-    if (j > cast(unsigned int, MAX_INT)) {  /* overflow? */
       /* table was built with bad purposes: resort to linear search */
       i = 1;
       while (!ttisnil(luaH_getint(t, i))) i++;
       return i - 1;
     }
+    j *= 2;
   }
   /* now do a binary search between them */
   while (j - i > 1) {

ltable.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h,v 2.15 2011/08/09 20:58:29 roberto Exp roberto $
+** $Id: ltable.h,v 2.19 2014/07/29 16:22:24 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -11,22 +11,34 @@
 
 
 #define gnode(t,i)	(&(t)->node[i])
-#define gkey(n)		(&(n)->i_key.tvk)
 #define gval(n)		(&(n)->i_val)
 #define gnext(n)	((n)->i_key.nk.next)
 
+
+/* 'const' to avoid wrong writings that can mess up field 'next' */ 
+#define gkey(n)		cast(const TValue*, (&(n)->i_key.tvk))
+
+#define wgkey(n)		(&(n)->i_key.nk)
+
 #define invalidateTMcache(t)	((t)->flags = 0)
 
 
-LUAI_FUNC const TValue *luaH_getint (Table *t, int key);
+/* returns the key, given the value of a table entry */
-LUAI_FUNC void luaH_setint (lua_State *L, Table *t, int key, TValue *value);
+#define keyfromval(v) \
+  (gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
+
+
+LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
+LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
+                                                    TValue *value);
 LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
 LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
 LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
 LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
 LUAI_FUNC Table *luaH_new (lua_State *L);
-LUAI_FUNC void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize);
+LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
-LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize);
+                                                    unsigned int nhsize);
+LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
 LUAI_FUNC void luaH_free (lua_State *L, Table *t);
 LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
 LUAI_FUNC int luaH_getn (Table *t);

ltablib.c

@@ -1,10 +1,11 @@
 /*
-** $Id: ltablib.c,v 1.64 2013/02/06 18:29:03 roberto Exp roberto $
+** $Id: ltablib.c,v 1.76 2014/09/22 06:42:15 roberto Exp roberto $
 ** Library for Table Manipulation
 ** See Copyright Notice in lua.h
 */
 
 
+#include <limits.h>
 #include <stddef.h>
 
 #define ltablib_c
@@ -16,8 +17,40 @@
 #include "lualib.h"
 
 
-#define aux_getn(L,n)	(luaL_checktype(L, n, LUA_TTABLE), luaL_len(L, n))
 
+/*
+** Structure with table-access functions
+*/
+typedef struct {
+  int (*geti) (lua_State *L, int idx, lua_Integer n);
+  void (*seti) (lua_State *L, int idx, lua_Integer n);
+} TabA;
+
+
+/*
+** Check that 'arg' has a table and set access functions in 'ta' to raw
+** or non-raw according to the presence of corresponding metamethods.
+*/
+static void checktab (lua_State *L, int arg, TabA *ta) {
+  ta->geti = NULL; ta->seti = NULL;
+  if (lua_getmetatable(L, arg)) {
+    lua_pushliteral(L, "__index");  /* 'index' metamethod */
+    if (lua_rawget(L, -2) != LUA_TNIL)
+      ta->geti = lua_geti;
+    lua_pushliteral(L, "__newindex");  /* 'newindex' metamethod */
+    if (lua_rawget(L, -3) != LUA_TNIL)
+      ta->seti = lua_seti;
+    lua_pop(L, 3);  /* pop metatable plus both metamethods */
+  }
+  if (ta->geti == NULL || ta->seti == NULL) {
+    luaL_checktype(L, arg, LUA_TTABLE);  /* must be table for raw methods */
+    if (ta->geti == NULL) ta->geti = lua_rawgeti;
+    if (ta->seti == NULL) ta->seti = lua_rawseti;
+  }
+}
+
+
+#define aux_getn(L,n,ta)	(checktab(L, n, ta), luaL_len(L, n))
 
 
 #if defined(LUA_COMPAT_MAXN)
@@ -39,72 +72,110 @@ static int maxn (lua_State *L) {
 
 
 static int tinsert (lua_State *L) {
-  int e = aux_getn(L, 1) + 1;  /* first empty element */
+  TabA ta;
-  int pos;  /* where to insert new element */
+  lua_Integer e = aux_getn(L, 1, &ta) + 1;  /* first empty element */
+  lua_Integer pos;  /* where to insert new element */
   switch (lua_gettop(L)) {
     case 2: {  /* called with only 2 arguments */
       pos = e;  /* insert new element at the end */
       break;
     }
     case 3: {
-      int i;
+      lua_Integer i;
-      pos = luaL_checkint(L, 2);  /* 2nd argument is the position */
+      pos = luaL_checkinteger(L, 2);  /* 2nd argument is the position */
       luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds");
       for (i = e; i > pos; i--) {  /* move up elements */
-        lua_rawgeti(L, 1, i-1);
+        (*ta.geti)(L, 1, i - 1);
-        lua_rawseti(L, 1, i);  /* t[i] = t[i-1] */
+        (*ta.seti)(L, 1, i);  /* t[i] = t[i - 1] */
       }
       break;
     }
     default: {
-      return luaL_error(L, "wrong number of arguments to " LUA_QL("insert"));
+      return luaL_error(L, "wrong number of arguments to 'insert'");
     }
   }
-  lua_rawseti(L, 1, pos);  /* t[pos] = v */
+  (*ta.seti)(L, 1, pos);  /* t[pos] = v */
   return 0;
 }
 
 
 static int tremove (lua_State *L) {
-  int size = aux_getn(L, 1);
+  TabA ta;
-  int pos = luaL_optint(L, 2, size);
+  lua_Integer size = aux_getn(L, 1, &ta);
+  lua_Integer pos = luaL_optinteger(L, 2, size);
   if (pos != size)  /* validate 'pos' if given */
     luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
-  lua_rawgeti(L, 1, pos);  /* result = t[pos] */
+  (*ta.geti)(L, 1, pos);  /* result = t[pos] */
   for ( ; pos < size; pos++) {
-    lua_rawgeti(L, 1, pos+1);
+    (*ta.geti)(L, 1, pos + 1);
-    lua_rawseti(L, 1, pos);  /* t[pos] = t[pos+1] */
+    (*ta.seti)(L, 1, pos);  /* t[pos] = t[pos + 1] */
   }
   lua_pushnil(L);
-  lua_rawseti(L, 1, pos);  /* t[pos] = nil */
+  (*ta.seti)(L, 1, pos);  /* t[pos] = nil */
   return 1;
 }
 
 
-static void addfield (lua_State *L, luaL_Buffer *b, int i) {
+static int tmove (lua_State *L) {
-  lua_rawgeti(L, 1, i);
+  TabA ta;
+  lua_Integer f = luaL_checkinteger(L, 2);
+  lua_Integer e = luaL_checkinteger(L, 3);
+  lua_Integer t = luaL_checkinteger(L, 4);
+  int tt = !lua_isnoneornil(L, 5) ? 5 : 1;  /* destination table */
+  /* the following restriction avoids several problems with overflows */
+  luaL_argcheck(L, f > 0, 2, "initial position must be positive");
+  if (e >= f) {  /* otherwise, nothing to move */
+    lua_Integer n, i;
+    ta.geti = (luaL_getmetafield(L, 1, "__index") == LUA_TNIL)
+      ? (luaL_checktype(L, 1, LUA_TTABLE), lua_rawgeti)
+      : lua_geti;
+    ta.seti = (luaL_getmetafield(L, tt, "__newindex") == LUA_TNIL)
+      ? (luaL_checktype(L, tt, LUA_TTABLE), lua_rawseti)
+      : lua_seti;
+    n = e - f + 1;  /* number of elements to move */
+    if (t > f) {
+      for (i = n - 1; i >= 0; i--) {
+        (*ta.geti)(L, 1, f + i);
+        (*ta.seti)(L, tt, t + i);
+      }
+    }
+    else {
+      for (i = 0; i < n; i++) {
+        (*ta.geti)(L, 1, f + i);
+        (*ta.seti)(L, tt, t + i);
+      }
+    }
+  }
+  lua_pushvalue(L, tt);  /* return "to table" */
+  return 1;
+}
+
+
+static void addfield (lua_State *L, luaL_Buffer *b, TabA *ta, lua_Integer i) {
+  (*ta->geti)(L, 1, i);
   if (!lua_isstring(L, -1))
-    luaL_error(L, "invalid value (%s) at index %d in table for "
+    luaL_error(L, "invalid value (%s) at index %d in table for 'concat'",
-                  LUA_QL("concat"), luaL_typename(L, -1), i);
+                  luaL_typename(L, -1), i);
   luaL_addvalue(b);
 }
 
 
 static int tconcat (lua_State *L) {
+  TabA ta;
   luaL_Buffer b;
   size_t lsep;
-  int i, last;
+  lua_Integer i, last;
   const char *sep = luaL_optlstring(L, 2, "", &lsep);
-  luaL_checktype(L, 1, LUA_TTABLE);
+  checktab(L, 1, &ta);
-  i = luaL_optint(L, 3, 1);
+  i = luaL_optinteger(L, 3, 1);
-  last = luaL_opt(L, luaL_checkint, 4, luaL_len(L, 1));
+  last = luaL_opt(L, luaL_checkinteger, 4, luaL_len(L, 1));
   luaL_buffinit(L, &b);
   for (; i < last; i++) {
-    addfield(L, &b, i);
+    addfield(L, &b, &ta, i);
     luaL_addlstring(&b, sep, lsep);
   }
   if (i == last)  /* add last value (if interval was not empty) */
-    addfield(L, &b, i);
+    addfield(L, &b, &ta, i);
   luaL_pushresult(&b);
   return 1;
 }
@@ -117,35 +188,34 @@ static int tconcat (lua_State *L) {
 */
 
 static int pack (lua_State *L) {
+  int i;
   int n = lua_gettop(L);  /* number of elements to pack */
   lua_createtable(L, n, 1);  /* create result table */
+  lua_insert(L, 1);  /* put it at index 1 */
+  for (i = n; i >= 1; i--)  /* assign elements */
+    lua_rawseti(L, 1, i);
   lua_pushinteger(L, n);
-  lua_setfield(L, -2, "n");  /* t.n = number of elements */
+  lua_setfield(L, 1, "n");  /* t.n = number of elements */
-  if (n > 0) {  /* at least one element? */
-    int i;
-    lua_pushvalue(L, 1);
-    lua_rawseti(L, -2, 1);  /* insert first element */
-    lua_replace(L, 1);  /* move table into index 1 */
-    for (i = n; i >= 2; i--)  /* assign other elements */
-      lua_rawseti(L, 1, i);
-  }
   return 1;  /* return table */
 }
 
 
 static int unpack (lua_State *L) {
-  int i, e, n;
+  TabA ta;
-  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_Integer i, e;
-  i = luaL_optint(L, 2, 1);
+  lua_Unsigned n;
-  e = luaL_opt(L, luaL_checkint, 3, luaL_len(L, 1));
+  checktab(L, 1, &ta);
+  i = luaL_optinteger(L, 2, 1);
+  e = luaL_opt(L, luaL_checkinteger, 3, luaL_len(L, 1));
   if (i > e) return 0;  /* empty range */
-  n = e - i + 1;  /* number of elements */
+  n = (lua_Unsigned)e - i;  /* number of elements minus 1 (avoid overflows) */
-  if (n <= 0 || !lua_checkstack(L, n))  /* n <= 0 means arith. overflow */
+  if (n >= (unsigned int)INT_MAX  || !lua_checkstack(L, (int)(++n)))
     return luaL_error(L, "too many results to unpack");
-  lua_rawgeti(L, 1, i);  /* push arg[i] (avoiding overflow problems) */
+  do {  /* must have at least one element */
-  while (i++ < e)  /* push arg[i + 1...e] */
+    (*ta.geti)(L, 1, i);  /* push arg[i..e] */
-    lua_rawgeti(L, 1, i);
+  } while (i++ < e); 
-  return n;
+
+  return (int)n;
 }
 
 /* }====================================================== */
@@ -161,9 +231,9 @@ static int unpack (lua_State *L) {
 */
 
 
-static void set2 (lua_State *L, int i, int j) {
+static void set2 (lua_State *L, TabA *ta, int i, int j) {
-  lua_rawseti(L, 1, i);
+  (*ta->seti)(L, 1, i);
-  lua_rawseti(L, 1, j);
+  (*ta->seti)(L, 1, j);
 }
 
 static int sort_comp (lua_State *L, int a, int b) {
@@ -181,45 +251,45 @@ static int sort_comp (lua_State *L, int a, int b) {
     return lua_compare(L, a, b, LUA_OPLT);
 }
 
-static void auxsort (lua_State *L, int l, int u) {
+static void auxsort (lua_State *L, TabA *ta, int l, int u) {
   while (l < u) {  /* for tail recursion */
     int i, j;
     /* sort elements a[l], a[(l+u)/2] and a[u] */
-    lua_rawgeti(L, 1, l);
+    (*ta->geti)(L, 1, l);
-    lua_rawgeti(L, 1, u);
+    (*ta->geti)(L, 1, u);
     if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
-      set2(L, l, u);  /* swap a[l] - a[u] */
+      set2(L, ta, l, u);  /* swap a[l] - a[u] */
     else
       lua_pop(L, 2);
     if (u-l == 1) break;  /* only 2 elements */
     i = (l+u)/2;
-    lua_rawgeti(L, 1, i);
+    (*ta->geti)(L, 1, i);
-    lua_rawgeti(L, 1, l);
+    (*ta->geti)(L, 1, l);
     if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
-      set2(L, i, l);
+      set2(L, ta, i, l);
     else {
       lua_pop(L, 1);  /* remove a[l] */
-      lua_rawgeti(L, 1, u);
+      (*ta->geti)(L, 1, u);
       if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
-        set2(L, i, u);
+        set2(L, ta, i, u);
       else
         lua_pop(L, 2);
     }
     if (u-l == 2) break;  /* only 3 elements */
-    lua_rawgeti(L, 1, i);  /* Pivot */
+    (*ta->geti)(L, 1, i);  /* Pivot */
     lua_pushvalue(L, -1);
-    lua_rawgeti(L, 1, u-1);
+    (*ta->geti)(L, 1, u-1);
-    set2(L, i, u-1);
+    set2(L, ta, i, u-1);
     /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
     i = l; j = u-1;
     for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
       /* repeat ++i until a[i] >= P */
-      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+      while ((*ta->geti)(L, 1, ++i), sort_comp(L, -1, -2)) {
         if (i>=u) luaL_error(L, "invalid order function for sorting");
         lua_pop(L, 1);  /* remove a[i] */
       }
       /* repeat --j until a[j] <= P */
-      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+      while ((*ta->geti)(L, 1, --j), sort_comp(L, -3, -1)) {
         if (j<=l) luaL_error(L, "invalid order function for sorting");
         lua_pop(L, 1);  /* remove a[j] */
       }
@@ -227,11 +297,11 @@ static void auxsort (lua_State *L, int l, int u) {
         lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
         break;
       }
-      set2(L, i, j);
+      set2(L, ta, i, j);
     }
-    lua_rawgeti(L, 1, u-1);
+    (*ta->geti)(L, 1, u-1);
-    lua_rawgeti(L, 1, i);
+    (*ta->geti)(L, 1, i);
-    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    set2(L, ta, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
     /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
     /* adjust so that smaller half is in [j..i] and larger one in [l..u] */
     if (i-l < u-i) {
@@ -240,17 +310,18 @@ static void auxsort (lua_State *L, int l, int u) {
     else {
       j=i+1; i=u; u=j-2;
     }
-    auxsort(L, j, i);  /* call recursively the smaller one */
+    auxsort(L, ta, j, i);  /* call recursively the smaller one */
   }  /* repeat the routine for the larger one */
 }
 
 static int sort (lua_State *L) {
-  int n = aux_getn(L, 1);
+  TabA ta;
-  luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
+  int n = (int)aux_getn(L, 1, &ta);
+  luaL_checkstack(L, 50, "");  /* assume array is smaller than 2^50 */
   if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
     luaL_checktype(L, 2, LUA_TFUNCTION);
-  lua_settop(L, 2);  /* make sure there is two arguments */
+  lua_settop(L, 2);  /* make sure there are two arguments */
-  auxsort(L, 1, n);
+  auxsort(L, &ta, 1, n);
   return 0;
 }
 
@@ -266,6 +337,7 @@ static const luaL_Reg tab_funcs[] = {
   {"pack", pack},
   {"unpack", unpack},
   {"remove", tremove},
+  {"move", tmove},
   {"sort", sort},
   {NULL, NULL}
 };

ltests.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.h,v 2.32 2010/04/19 17:40:13 roberto Exp roberto $
+** $Id: ltests.h,v 2.39 2014/07/24 19:33:29 roberto Exp roberto $
 ** Internal Header for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -10,11 +10,24 @@
 
 #include <stdlib.h>
 
-/* do not use compatibility macros in Lua code */
+/* test Lua with no compatibility code */
-#undef LUA_COMPAT_API
+#undef LUA_COMPAT_MATHLIB
+#undef LUA_COMPAT_IPAIRS
+#undef LUA_COMPAT_BITLIB
+#undef LUA_COMPAT_APIINTCASTS
+#undef LUA_COMPAT_FLOATSTRING
+#undef LUA_COMPAT_UNPACK
+#undef LUA_COMPAT_LOADERS
+#undef LUA_COMPAT_LOG10
+#undef LUA_COMPAT_LOADSTRING
+#undef LUA_COMPAT_MAXN
+#undef LUA_COMPAT_MODULE
+
 
 #define LUA_DEBUG
 
+
+/* turn on assertions */
 #undef NDEBUG
 #include <assert.h>
 #define lua_assert(c)           assert(c)
@@ -24,7 +37,7 @@
 #define UNUSED(x)       (x=0, (void)(x))
 
 
-/* memory allocator control variables */
+/* memory-allocator control variables */
 typedef struct Memcontrol {
   unsigned long numblocks;
   unsigned long total;
@@ -42,34 +55,35 @@ extern Memcontrol l_memcontrol;
 extern void *l_Trick;
 
 
-void *debug_realloc (void *ud, void *block, size_t osize, size_t nsize);
-
-
-typedef struct CallInfo *pCallInfo;
 
+/*
+** Function to traverse and check all memory used by Lua
+*/
 int lua_checkmemory (lua_State *L);
 
 
 /* test for lock/unlock */
-#undef luai_userstateopen
-#undef luai_userstatethread
-#undef lua_lock
-#undef lua_unlock
 
 struct L_EXTRA { int lock; int *plock; };
-#define LUAI_EXTRASPACE		sizeof(struct L_EXTRA)
+#undef LUA_EXTRASPACE
-#define getlock(l)	(cast(struct L_EXTRA *, l) - 1)
+#define LUA_EXTRASPACE	sizeof(struct L_EXTRA)
+#define getlock(l)	cast(struct L_EXTRA*, lua_getextraspace(l))
 #define luai_userstateopen(l)  \
 	(getlock(l)->lock = 0, getlock(l)->plock = &(getlock(l)->lock))
-#define luai_userstatethread(l,l1)  (getlock(l1)->plock = getlock(l)->plock)
+#define luai_userstateclose(l)  \
+  lua_assert(getlock(l)->lock == 1 && getlock(l)->plock == &(getlock(l)->lock))
+#define luai_userstatethread(l,l1) \
+  lua_assert(getlock(l1)->plock == getlock(l)->plock)
 #define luai_userstatefree(l,l1) \
   lua_assert(getlock(l)->plock == getlock(l1)->plock)
 #define lua_lock(l)     lua_assert((*getlock(l)->plock)++ == 0)
 #define lua_unlock(l)   lua_assert(--(*getlock(l)->plock) == 0)
 
 
+
 int luaB_opentests (lua_State *L);
 
+void *debug_realloc (void *ud, void *block, size_t osize, size_t nsize);
 
 #if defined(lua_c)
 #define luaL_newstate()		lua_newstate(debug_realloc, &l_memcontrol)
@@ -87,7 +101,8 @@ int luaB_opentests (lua_State *L);
 
 
 #undef LUAI_USER_ALIGNMENT_T
-#define LUAI_USER_ALIGNMENT_T   union { char b[32]; }
+#define LUAI_USER_ALIGNMENT_T   union { char b[sizeof(void*) * 8]; }
 
 
 #endif
+

ltm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 2.13 2011/02/28 17:32:10 roberto Exp roberto $
+** $Id: ltm.c,v 2.28 2014/07/18 12:17:54 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -12,11 +12,14 @@
 
 #include "lua.h"
 
+#include "ldebug.h"
+#include "ldo.h" 
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
+#include "lvm.h"
 
 
 static const char udatatypename[] = "userdata";
@@ -25,7 +28,7 @@ LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
   "no value",
   "nil", "boolean", udatatypename, "number",
   "string", "table", "function", udatatypename, "thread",
-  "proto", "upval"  /* these last two cases are used for tests only */
+  "proto" /* this last case is used for tests only */
 };
 
 
@@ -33,14 +36,16 @@ void luaT_init (lua_State *L) {
   static const char *const luaT_eventname[] = {  /* ORDER TM */
     "__index", "__newindex",
     "__gc", "__mode", "__len", "__eq",
-    "__add", "__sub", "__mul", "__div", "__mod",
+    "__add", "__sub", "__mul", "__mod", "__pow",
-    "__pow", "__unm", "__lt", "__le",
+    "__div", "__idiv",
+    "__band", "__bor", "__bxor", "__shl", "__shr",
+    "__unm", "__bnot", "__lt", "__le",
     "__concat", "__call"
   };
   int i;
   for (i=0; i<TM_N; i++) {
     G(L)->tmname[i] = luaS_new(L, luaT_eventname[i]);
-    luaS_fix(G(L)->tmname[i]);  /* never collect these names */
+    luaC_fix(L, obj2gco(G(L)->tmname[i]));  /* never collect these names */
   }
 }
 
@@ -62,7 +67,7 @@ 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 (ttypenv(o)) {
+  switch (ttnov(o)) {
     case LUA_TTABLE:
       mt = hvalue(o)->metatable;
       break;
@@ -70,8 +75,65 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
       mt = uvalue(o)->metatable;
       break;
     default:
-      mt = G(L)->mt[ttypenv(o)];
+      mt = G(L)->mt[ttnov(o)];
   }
   return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject);
 }
 
+
+void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
+                  const TValue *p2, TValue *p3, int hasres) {
+  ptrdiff_t result = savestack(L, p3);
+  setobj2s(L, L->top++, f);  /* push function */
+  setobj2s(L, L->top++, p1);  /* 1st argument */
+  setobj2s(L, L->top++, p2);  /* 2nd argument */
+  if (!hasres)  /* no result? 'p3' is third argument */
+    setobj2s(L, L->top++, p3);  /* 3rd argument */
+  /* metamethod may yield only when called from Lua code */
+  luaD_call(L, L->top - (4 - hasres), hasres, isLua(L->ci));
+  if (hasres) {  /* if has result, move it to its place */
+    p3 = restorestack(L, result);
+    setobjs2s(L, p3, --L->top);
+  }
+}
+
+
+int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                    StkId res, TMS event) {
+  const TValue *tm = luaT_gettmbyobj(L, p1, event);  /* try first operand */
+  if (ttisnil(tm))
+    tm = luaT_gettmbyobj(L, p2, event);  /* try second operand */
+  if (ttisnil(tm)) return 0;
+  luaT_callTM(L, tm, p1, p2, res, 1);
+  return 1;
+}
+
+
+void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                    StkId res, TMS event) {
+  if (!luaT_callbinTM(L, p1, p2, res, event)) {
+    switch (event) {
+      case TM_CONCAT:
+        luaG_concaterror(L, p1, p2);
+      case TM_IDIV: case TM_BAND: case TM_BOR: case TM_BXOR:
+      case TM_SHL: case TM_SHR: case TM_BNOT: {
+        lua_Number dummy;
+        if (tonumber(p1, &dummy) && tonumber(p2, &dummy))
+          luaG_tointerror(L, p1, p2);
+        /* else go through */
+      }
+      default:
+        luaG_aritherror(L, p1, p2);
+    }
+  }
+}
+
+
+int luaT_callorderTM (lua_State *L, const TValue *p1, const TValue *p2,
+                      TMS event) {
+  if (!luaT_callbinTM(L, p1, p2, L->top, event))
+    return -1;  /* no metamethod */
+  else
+    return !l_isfalse(L->top);
+}
+

ltm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 2.10 2010/04/13 20:48:12 roberto Exp roberto $
+** $Id: ltm.h,v 2.19 2013/12/30 20:47:58 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -13,7 +13,7 @@
 
 /*
 * WARNING: if you change the order of this enumeration,
-* grep "ORDER TM"
+* grep "ORDER TM" and "ORDER OP"
 */
 typedef enum {
   TM_INDEX,
@@ -25,10 +25,17 @@ typedef enum {
   TM_ADD,
   TM_SUB,
   TM_MUL,
-  TM_DIV,
   TM_MOD,
   TM_POW,
+  TM_DIV,
+  TM_IDIV,
+  TM_BAND,
+  TM_BOR,
+  TM_BXOR,
+  TM_SHL,
+  TM_SHR,
   TM_UNM,
+  TM_BNOT,
   TM_LT,
   TM_LE,
   TM_CONCAT,
@@ -44,7 +51,7 @@ typedef enum {
 #define fasttm(l,et,e)	gfasttm(G(l), et, e)
 
 #define ttypename(x)	luaT_typenames_[(x) + 1]
-#define objtypename(x)	ttypename(ttypenv(x))
+#define objtypename(x)	ttypename(ttnov(x))
 
 LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
 
@@ -54,4 +61,15 @@ LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
                                                        TMS event);
 LUAI_FUNC void luaT_init (lua_State *L);
 
+LUAI_FUNC void luaT_callTM (lua_State *L, const TValue *f, const TValue *p1,
+                            const TValue *p2, TValue *p3, int hasres);
+LUAI_FUNC int luaT_callbinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                              StkId res, TMS event);
+LUAI_FUNC void luaT_trybinTM (lua_State *L, const TValue *p1, const TValue *p2,
+                              StkId res, TMS event);
+LUAI_FUNC int luaT_callorderTM (lua_State *L, const TValue *p1,
+                                const TValue *p2, TMS event);
+
+
+
 #endif

lua.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.205 2012/05/23 15:37:09 roberto Exp roberto $
+** $Id: lua.c,v 1.216 2014/10/20 18:19:26 roberto Exp roberto $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -31,28 +31,38 @@
 #define LUA_MAXINPUT		512
 #endif
 
-#if !defined(LUA_INIT)
+#if !defined(LUA_INIT_VAR)
-#define LUA_INIT		"LUA_INIT"
+#define LUA_INIT_VAR		"LUA_INIT"
 #endif
 
-#define LUA_INITVERSION  \
+#define LUA_INITVARVERSION  \
-	LUA_INIT "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
+	LUA_INIT_VAR "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
 
 
 /*
 ** lua_stdin_is_tty detects whether the standard input is a 'tty' (that
 ** is, whether we're running lua interactively).
 */
-#if defined(LUA_USE_ISATTY)
+#if !defined(lua_stdin_is_tty)	/* { */
+
+#if defined(LUA_USE_POSIX)	/* { */
+
 #include <unistd.h>
 #define lua_stdin_is_tty()	isatty(0)
-#elif defined(LUA_WIN)
+
+#elif defined(LUA_WIN)		/* }{ */
+
 #include <io.h>
-#include <stdio.h>
 #define lua_stdin_is_tty()	_isatty(_fileno(stdin))
-#else
+
+#else				/* }{ */
+
+/* ANSI definition */
 #define lua_stdin_is_tty()	1  /* assume stdin is a tty */
-#endif
+
+#endif				/* } */
+
+#endif				/* } */
 
 
 /*
@@ -61,9 +71,10 @@
 ** lua_saveline defines how to "save" a read line in a "history".
 ** lua_freeline defines how to free a line read by lua_readline.
 */
-#if defined(LUA_USE_READLINE)
+#if !defined(lua_readline)	/* { */
+
+#if defined(LUA_USE_READLINE)	/* { */
 
-#include <stdio.h>
 #include <readline/readline.h>
 #include <readline/history.h>
 #define lua_readline(L,b,p)	((void)L, ((b)=readline(p)) != NULL)
@@ -72,7 +83,7 @@
           add_history(lua_tostring(L, idx));  /* add it to history */
 #define lua_freeline(L,b)	((void)L, free(b))
 
-#elif !defined(lua_readline)
+#else				/* }{ */
 
 #define lua_readline(L,b,p) \
         ((void)L, fputs(p, stdout), fflush(stdout),  /* show prompt */ \
@@ -80,7 +91,9 @@
 #define lua_saveline(L,idx)	{ (void)L; (void)idx; }
 #define lua_freeline(L,b)	{ (void)L; (void)b; }
 
-#endif
+#endif				/* } */
+
+#endif				/* } */
 
 
 
@@ -90,17 +103,24 @@ static lua_State *globalL = NULL;
 static const char *progname = LUA_PROGNAME;
 
 
-
+/*
+** Hook set by signal function to stop the interpreter.
+*/
 static void lstop (lua_State *L, lua_Debug *ar) {
   (void)ar;  /* unused arg. */
-  lua_sethook(L, NULL, 0, 0);
+  lua_sethook(L, NULL, 0, 0);  /* reset hook */
   luaL_error(L, "interrupted!");
 }
 
 
+/*
+** Function to be called at a C signal. Because a C signal cannot
+** just change a Lua state (as there is no proper synchronization),
+** this function only sets a hook that, when called, will stop the
+** interpreter.
+*/
 static void laction (int i) {
-  signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
+  signal(i, SIG_DFL); /* if another SIGINT happens, terminate process */
-                              terminate process (default action) */
   lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
 }
 
@@ -114,9 +134,9 @@ static void print_usage (const char *badoption) {
   luai_writestringerror(
   "usage: %s [options] [script [args]]\n"
   "Available options are:\n"
-  "  -e stat  execute string " LUA_QL("stat") "\n"
+  "  -e stat  execute string 'stat'\n"
-  "  -i       enter interactive mode after executing " LUA_QL("script") "\n"
+  "  -i       enter interactive mode after executing 'script'\n"
-  "  -l name  require library " LUA_QL("name") "\n"
+  "  -l name  require library 'name'\n"
   "  -v       show version information\n"
   "  -E       ignore environment variables\n"
   "  --       stop handling options\n"
@@ -126,59 +146,63 @@ static void print_usage (const char *badoption) {
 }
 
 
+/*
+** Prints an error message, adding the program name in front of it
+** (if present)
+*/
 static void l_message (const char *pname, const char *msg) {
   if (pname) luai_writestringerror("%s: ", pname);
   luai_writestringerror("%s\n", msg);
 }
 
 
+/*
+** Check whether 'status' is not OK and, if so, prints the error
+** message on the top of the stack. It assumes that the error object
+** is a string, as it was either generated by Lua or by 'msghandler'.
+*/
 static int report (lua_State *L, int status) {
-  if (status != LUA_OK && !lua_isnil(L, -1)) {
+  if (status != LUA_OK) {
     const char *msg = lua_tostring(L, -1);
-    if (msg == NULL) msg = "(error object is not a string)";
     l_message(progname, msg);
-    lua_pop(L, 1);
+    lua_pop(L, 1);  /* remove message */
-    /* force a complete garbage collection in case of errors */
-    lua_gc(L, LUA_GCCOLLECT, 0);
   }
   return status;
 }
 
 
-/* the next function is called unprotected, so it must avoid errors */
+/*
-static void finalreport (lua_State *L, int status) {
+** Message handler used to run all chunks
-  if (status != LUA_OK) {
+*/
-    const char *msg = (lua_type(L, -1) == LUA_TSTRING) ? lua_tostring(L, -1)
+static int msghandler (lua_State *L) {
-                                                       : NULL;
-    if (msg == NULL) msg = "(error object is not a string)";
-    l_message(progname, msg);
-    lua_pop(L, 1);
-  }
-}
-
-
-static int traceback (lua_State *L) {
   const char *msg = lua_tostring(L, 1);
-  if (msg)
+  if (msg == NULL) {  /* is error object not a string? */
-    luaL_traceback(L, L, msg, 1);
+    if (luaL_callmeta(L, 1, "__tostring") &&  /* does it have a metamethod */
-  else if (!lua_isnoneornil(L, 1)) {  /* is there an error object? */
+        lua_type(L, -1) == LUA_TSTRING)  /* that produces a string? */
-    if (!luaL_callmeta(L, 1, "__tostring"))  /* try its 'tostring' metamethod */
+      return 1;  /* that is the message */
-      lua_pushliteral(L, "(no error message)");
+    else
+      msg = lua_pushfstring(L, "(error object is a %s value)",
+                               luaL_typename(L, 1));
   }
-  return 1;
+  luaL_traceback(L, L, msg, 1);  /* append a standard traceback */
+  return 1;  /* return the traceback */
 }
 
 
+/*
+** Interface to 'lua_pcall', which sets appropriate message function
+** and C-signal handler. Used to run all chunks.
+*/
 static int docall (lua_State *L, int narg, int nres) {
   int status;
   int base = lua_gettop(L) - narg;  /* function index */
-  lua_pushcfunction(L, traceback);  /* push traceback function */
+  lua_pushcfunction(L, msghandler);  /* push message handler */
-  lua_insert(L, base);  /* put it under chunk and args */
+  lua_insert(L, base);  /* put it under function and args */
   globalL = L;  /* to be available to 'laction' */
-  signal(SIGINT, laction);
+  signal(SIGINT, laction);  /* set C-signal handler */
   status = lua_pcall(L, narg, nres, base);
-  signal(SIGINT, SIG_DFL);
+  signal(SIGINT, SIG_DFL); /* reset C-signal handler */
-  lua_remove(L, base);  /* remove traceback function */
+  lua_remove(L, base);  /* remove message handler from the stack */
   return status;
 }
 
@@ -189,38 +213,47 @@ static void print_version (void) {
 }
 
 
-static int getargs (lua_State *L, char **argv, int n) {
+/*
-  int narg;
+** Create the 'arg' table, which stores all arguments from the
-  int i;
+** command line ('argv'). It should be aligned so that, at index 0,
-  int argc = 0;
+** it has 'argv[script]', which is the script name. The arguments
-  while (argv[argc]) argc++;  /* count total number of arguments */
+** to the script (everything after 'script') go to positive indices;
-  narg = argc - (n + 1);  /* number of arguments to the script */
+** other arguments (before the script name) go to negative indices.
-  luaL_checkstack(L, narg + 3, "too many arguments to script");
+** If there is no script name, assume interpreter's name as base.
-  for (i=n+1; i < argc; i++)
+*/
+static void createargtable (lua_State *L, char **argv, int argc, int script) {
+  int i, narg;
+  if (script == argc) script = 0;  /* no script name? */
+  narg = argc - (script + 1);  /* number of positive indices */
+  lua_createtable(L, narg, script + 1);
+  for (i = 0; i < argc; i++) {
     lua_pushstring(L, argv[i]);
-  lua_createtable(L, narg, n + 1);
+    lua_rawseti(L, -2, i - script);
-  for (i=0; i < argc; i++) {
-    lua_pushstring(L, argv[i]);
-    lua_rawseti(L, -2, i - n);
   }
-  return narg;
+  lua_setglobal(L, "arg");
+}
+
+
+static int dochunk (lua_State *L, int status) {
+  if (status == LUA_OK) status = docall(L, 0, 0);
+  return report(L, status);
 }
 
 
 static int dofile (lua_State *L, const char *name) {
-  int status = luaL_loadfile(L, name);
+  return dochunk(L, luaL_loadfile(L, name));
-  if (status == LUA_OK) status = docall(L, 0, 0);
-  return report(L, status);
 }
 
 
 static int dostring (lua_State *L, const char *s, const char *name) {
-  int status = luaL_loadbuffer(L, s, strlen(s), name);
+  return dochunk(L, luaL_loadbuffer(L, s, strlen(s), name));
-  if (status == LUA_OK) status = docall(L, 0, 0);
-  return report(L, status);
 }
 
 
+/*
+** Calls 'require(name)' and stores the result in a global variable
+** with the given name.
+*/
 static int dolibrary (lua_State *L, const char *name) {
   int status;
   lua_getglobal(L, "require");
@@ -232,6 +265,9 @@ static int dolibrary (lua_State *L, const char *name) {
 }
 
 
+/*
+** Returns the string to be used as a prompt by the interpreter.
+*/
 static const char *get_prompt (lua_State *L, int firstline) {
   const char *p;
   lua_getglobal(L, firstline ? "_PROMPT" : "_PROMPT2");
@@ -244,6 +280,12 @@ static const char *get_prompt (lua_State *L, int firstline) {
 #define EOFMARK		"<eof>"
 #define marklen		(sizeof(EOFMARK)/sizeof(char) - 1)
 
+
+/*
+** Check whether 'status' signals a syntax error and the error
+** message at the top of the stack ends with the above mark for
+** incomplete statements.
+*/
 static int incomplete (lua_State *L, int status) {
   if (status == LUA_ERRSYNTAX) {
     size_t lmsg;
@@ -257,20 +299,23 @@ static int incomplete (lua_State *L, int status) {
 }
 
 
+/*
+** Prompt the user, read a line, and push it into the Lua stack.
+*/
 static int pushline (lua_State *L, int firstline) {
   char buffer[LUA_MAXINPUT];
   char *b = buffer;
   size_t l;
   const char *prmt = get_prompt(L, firstline);
   int readstatus = lua_readline(L, b, prmt);
-  lua_pop(L, 1);  /* remove result from 'get_prompt' */
   if (readstatus == 0)
-    return 0;  /* no input */
+    return 0;  /* no input (prompt will be popped by caller) */
+  lua_pop(L, 1);  /* remove prompt */
   l = strlen(b);
   if (l > 0 && b[l-1] == '\n')  /* line ends with newline? */
     b[l-1] = '\0';  /* remove it */
-  if (firstline && b[0] == '=')  /* first line starts with `=' ? */
+  if (firstline && b[0] == '=')  /* for compatibility with 5.2, ... */
-    lua_pushfstring(L, "return %s", b+1);  /* change it to `return' */
+    lua_pushfstring(L, "return %s", b + 1);  /* change '=' to 'return' */
   else
     lua_pushstring(L, b);
   lua_freeline(L, b);
@@ -278,44 +323,91 @@ static int pushline (lua_State *L, int firstline) {
 }
 
 
+/*
+** Try to compile line on the stack as 'return <line>'; on return, stack
+** has either compiled chunk or original line (if compilation failed).
+*/
+static int addreturn (lua_State *L) {
+  int status;
+  size_t len; const char *line;
+  lua_pushliteral(L, "return ");
+  lua_pushvalue(L, -2);  /* duplicate line */
+  lua_concat(L, 2);  /* new line is "return ..." */
+  line = lua_tolstring(L, -1, &len);
+  if ((status = luaL_loadbuffer(L, line, len, "=stdin")) == LUA_OK)
+    lua_remove(L, -3);  /* remove original line */
+  else
+    lua_pop(L, 2);  /* remove result from 'luaL_loadbuffer' and new line */
+  return status;
+}
+
+
+/*
+** Read multiple lines until a complete Lua statement
+*/
+static int multiline (lua_State *L) {
+  for (;;) {  /* repeat until gets a complete statement */
+    size_t len;
+    const char *line = lua_tolstring(L, 1, &len);  /* get what it has */
+    int status = luaL_loadbuffer(L, line, len, "=stdin");  /* try it */
+    if (!incomplete(L, status) || !pushline(L, 0))
+      return status;  /* cannot or should not try to add continuation line */
+    lua_pushliteral(L, "\n");  /* add newline... */
+    lua_insert(L, -2);  /* ...between the two lines */
+    lua_concat(L, 3);  /* join them */
+  }
+}
+
+
+/*
+** Read a line and try to load (compile) it first as an expression (by
+** adding "return " in front of it) and second as a statement. Return
+** the final status of load/call with the resulting function (if any)
+** in the top of the stack.
+*/
 static int loadline (lua_State *L) {
   int status;
   lua_settop(L, 0);
   if (!pushline(L, 1))
     return -1;  /* no input */
-  for (;;) {  /* repeat until gets a complete line */
+  if ((status = addreturn(L)) != LUA_OK)  /* 'return ...' did not work? */
-    size_t l;
+    status = multiline(L);  /* try as command, maybe with continuation lines */
-    const char *line = lua_tolstring(L, 1, &l);
+  lua_saveline(L, 1);  /* keep history */
-    status = luaL_loadbuffer(L, line, l, "=stdin");
+  lua_remove(L, 1);  /* remove line from the stack */
-    if (!incomplete(L, status)) break;  /* cannot try to add lines? */
+  lua_assert(lua_gettop(L) == 1);
-    if (!pushline(L, 0))  /* no more input? */
-      return -1;
-    lua_pushliteral(L, "\n");  /* add a new line... */
-    lua_insert(L, -2);  /* ...between the two lines */
-    lua_concat(L, 3);  /* join them */
-  }
-  lua_saveline(L, 1);
-  lua_remove(L, 1);  /* remove line */
   return status;
 }
 
 
-static void dotty (lua_State *L) {
+/*
+** Prints (calling the Lua 'print' function) any values on the stack
+*/
+static void l_print (lua_State *L) {
+  int n = lua_gettop(L);
+  if (n > 0) {  /* any result to be printed? */
+    luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
+    lua_getglobal(L, "print");
+    lua_insert(L, 1);
+    if (lua_pcall(L, n, 0, 0) != LUA_OK)
+      l_message(progname, lua_pushfstring(L, "error calling 'print' (%s)",
+                                             lua_tostring(L, -1)));
+  }
+}
+
+
+/*
+** Do the REPL: repeatedly read (load) a line, evaluate (call) it, and
+** print any results.
+*/
+static void doREPL (lua_State *L) {
   int status;
   const char *oldprogname = progname;
-  progname = NULL;
+  progname = NULL;  /* no 'progname' on errors in interactive mode */
   while ((status = loadline(L)) != -1) {
-    if (status == LUA_OK) status = docall(L, 0, LUA_MULTRET);
+    if (status == LUA_OK)
-    report(L, status);
+      status = docall(L, 0, LUA_MULTRET);
-    if (status == LUA_OK && lua_gettop(L) > 0) {  /* any result to print? */
+    if (status == LUA_OK) l_print(L);
-      luaL_checkstack(L, LUA_MINSTACK, "too many results to print");
+    else report(L, status);
-      lua_getglobal(L, "print");
-      lua_insert(L, 1);
-      if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != LUA_OK)
-        l_message(progname, lua_pushfstring(L,
-                               "error calling " LUA_QL("print") " (%s)",
-                               lua_tostring(L, -1)));
-    }
   }
   lua_settop(L, 0);  /* clear stack */
   luai_writeline();
@@ -323,97 +415,115 @@ static void dotty (lua_State *L) {
 }
 
 
-static int handle_script (lua_State *L, char **argv, int n) {
+/*
+** Push on the stack the contents of table 'arg' from 1 to #arg
+*/
+static int pushargs (lua_State *L) {
+  int i, n;
+  lua_getglobal(L, "arg");
+  if (!lua_istable(L, -1))
+    luaL_error(L, "'arg' is not a table");
+  n = (int)luaL_len(L, -1);
+  luaL_checkstack(L, n + 3, "too many arguments to script");
+  for (i = 1; i <= n; i++)
+    lua_rawgeti(L, -i, i);
+  lua_remove(L, -i);  /* remove table from the stack */
+  return n;
+}
+
+
+static int handle_script (lua_State *L, char **argv) {
   int status;
-  const char *fname;
+  const char *fname = argv[0];
-  int narg = getargs(L, argv, n);  /* collect arguments */
+  if (strcmp(fname, "-") == 0 && strcmp(argv[-1], "--") != 0)
-  lua_setglobal(L, "arg");
-  fname = argv[n];
-  if (strcmp(fname, "-") == 0 && strcmp(argv[n-1], "--") != 0)
     fname = NULL;  /* stdin */
   status = luaL_loadfile(L, fname);
-  lua_insert(L, -(narg+1));
+  if (status == LUA_OK) {
-  if (status == LUA_OK)
+    int n = pushargs(L);  /* push arguments to script */
-    status = docall(L, narg, LUA_MULTRET);
+    status = docall(L, n, LUA_MULTRET);
-  else
+  }
-    lua_pop(L, narg);
   return report(L, status);
 }
 
 
-/* check that argument has no extra characters at the end */
-#define noextrachars(x)		{if ((x)[2] != '\0') return -1;}
 
+/* bits of various argument indicators in 'args' */
+#define has_error	1	/* bad option */
+#define has_i		2	/* -i */
+#define has_v		4	/* -v */
+#define has_e		8	/* -e */
+#define has_E		16	/* -E */
 
-/* indices of various argument indicators in array args */
+/*
-#define has_i		0	/* -i */
+** Traverses all arguments from 'argv', returning a mask with those
-#define has_v		1	/* -v */
+** needed before running any Lua code (or an error code if it finds
-#define has_e		2	/* -e */
+** any invalid argument). 'first' returns the first not-handled argument 
-#define has_E		3	/* -E */
+** (either the script name or a bad argument in case of error).
-
+*/
-#define num_has		4	/* number of 'has_*' */
+static int collectargs (char **argv, int *first) {
-
+  int args = 0;
-
-static int collectargs (char **argv, int *args) {
   int i;
   for (i = 1; argv[i] != NULL; i++) {
+    *first = i;
     if (argv[i][0] != '-')  /* not an option? */
-        return i;
+        return args;  /* stop handling options */
-    switch (argv[i][1]) {  /* option */
+    switch (argv[i][1]) {  /* else check option */
-      case '-':
+      case '-':  /* '--' */
-        noextrachars(argv[i]);
+        if (argv[i][2] != '\0')  /* extra characters after '--'? */
-        return (argv[i+1] != NULL ? i+1 : 0);
+          return has_error;  /* invalid option */
-      case '\0':
+        *first = i + 1;
-        return i;
+        return args;
+      case '\0':  /* '-' */
+        return args;  /* script "name" is '-' */
       case 'E':
-        args[has_E] = 1;
+        if (argv[i][2] != '\0')  /* extra characters after 1st? */
+          return has_error;  /* invalid option */
+        args |= has_E;
         break;
       case 'i':
-        noextrachars(argv[i]);
+        args |= has_i;  /* goes through  (-i implies -v) */
-        args[has_i] = 1;  /* go through */
       case 'v':
-        noextrachars(argv[i]);
+        if (argv[i][2] != '\0')  /* extra characters after 1st? */
-        args[has_v] = 1;
+          return has_error;  /* invalid option */
+        args |= has_v;
         break;
       case 'e':
-        args[has_e] = 1;  /* go through */
+        args |= has_e;  /* go through */
       case 'l':  /* both options need an argument */
         if (argv[i][2] == '\0') {  /* no concatenated argument? */
           i++;  /* try next 'argv' */
           if (argv[i] == NULL || argv[i][0] == '-')
-            return -(i - 1);  /* no next argument or it is another option */
+            return has_error;  /* no next argument or it is another option */
         }
         break;
-      default:  /* invalid option; return its index... */
+      default:  /* invalid option */
-        return -i;  /* ...as a negative value */
+        return has_error;
     }
   }
-  return 0;
+  *first = i;  /* no script name */
+  return args;
 }
 
 
+/*
+** Processes options 'e' and 'l', which involve running Lua code.
+** Returns 0 if some code raises an error.
+*/
 static int runargs (lua_State *L, char **argv, int n) {
   int i;
   for (i = 1; i < n; i++) {
-    lua_assert(argv[i][0] == '-');
+    int status;
-    switch (argv[i][1]) {  /* option */
+    int option = argv[i][1];
-      case 'e': {
+    lua_assert(argv[i][0] == '-');  /* already checked */
-        const char *chunk = argv[i] + 2;
+    if (option == 'e' || option == 'l') {
-        if (*chunk == '\0') chunk = argv[++i];
+      const char *extra = argv[i] + 2;  /* both options need an argument */
-        lua_assert(chunk != NULL);
+      if (*extra == '\0') extra = argv[++i];
-        if (dostring(L, chunk, "=(command line)") != LUA_OK)
+      lua_assert(extra != NULL);
-          return 0;
+      if (option == 'e')
-        break;
+        status = dostring(L, extra, "=(command line)");
-      }
+      else
-      case 'l': {
+        status = dolibrary(L, extra);
-        const char *filename = argv[i] + 2;
+      if (status != LUA_OK) return 0;
-        if (*filename == '\0') filename = argv[++i];
-        lua_assert(filename != NULL);
-        if (dolibrary(L, filename) != LUA_OK)
-          return 0;  /* stop if file fails */
-        break;
-      }
-      default: break;
     }
   }
   return 1;
@@ -421,10 +531,10 @@ static int runargs (lua_State *L, char **argv, int n) {
 
 
 static int handle_luainit (lua_State *L) {
-  const char *name = "=" LUA_INITVERSION;
+  const char *name = "=" LUA_INITVARVERSION;
   const char *init = getenv(name + 1);
   if (init == NULL) {
-    name = "=" LUA_INIT;
+    name = "=" LUA_INIT_VAR;
     init = getenv(name + 1);  /* try alternative name */
   }
   if (init == NULL) return LUA_OK;
@@ -435,40 +545,44 @@ static int handle_luainit (lua_State *L) {
 }
 
 
+/*
+** Main body of stand-alone interpreter (to be called in protected mode).
+** Reads the options and handles them all.
+*/
 static int pmain (lua_State *L) {
   int argc = (int)lua_tointeger(L, 1);
   char **argv = (char **)lua_touserdata(L, 2);
   int script;
-  int args[num_has];
+  int args = collectargs(argv, &script);
-  args[has_i] = args[has_v] = args[has_e] = args[has_E] = 0;
+  luaL_checkversion(L);  /* check that interpreter has correct version */
   if (argv[0] && argv[0][0]) progname = argv[0];
-  script = collectargs(argv, args);
+  if (args == has_error) {  /* bad arg? */
-  if (script < 0) {  /* invalid arg? */
+    print_usage(argv[script]);  /* 'script' has index of bad arg. */
-    print_usage(argv[-script]);
     return 0;
   }
-  if (args[has_v]) print_version();
+  if (args & has_v)  /* option '-v'? */
-  if (args[has_E]) {  /* option '-E'? */
+    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_openlibs(L);  /* open standard libraries */
-  luaL_checkversion(L);
+  createargtable(L, argv, argc, script);  /* create table 'arg' */
-  lua_gc(L, LUA_GCSTOP, 0);  /* stop collector during initialization */
+  if (!(args & has_E)) {  /* no option '-E'? */
-  luaL_openlibs(L);  /* open libraries */
+    if (handle_luainit(L) != LUA_OK)  /* run LUA_INIT */
-  lua_gc(L, LUA_GCRESTART, 0);
+      return 0;  /* error running LUA_INIT */
-  if (!args[has_E] && handle_luainit(L) != LUA_OK)
+  }
-    return 0;  /* error running LUA_INIT */
+  if (!runargs(L, argv, script))  /* execute arguments -e and -l */
-  /* execute arguments -e and -l */
+    return 0;  /* something failed */
-  if (!runargs(L, argv, (script > 0) ? script : argc)) return 0;
+  if (script < argc &&  /* execute main script (if there is one) */
-  /* execute main script (if there is one) */
+      handle_script(L, argv + script) != LUA_OK)
-  if (script && handle_script(L, argv, script) != LUA_OK) return 0;
+    return 0;
-  if (args[has_i])  /* -i option? */
+  if (args & has_i)  /* -i option? */
-    dotty(L);
+    doREPL(L);  /* do read-eval-print loop */
-  else if (script == 0 && !args[has_e] && !args[has_v]) {  /* no arguments? */
+  else if (script == argc && !(args & (has_e | has_v))) {  /* no arguments? */
-    if (lua_stdin_is_tty()) {
+    if (lua_stdin_is_tty()) {  /* running in interactive mode? */
       print_version();
-      dotty(L);
+      doREPL(L);  /* do read-eval-print loop */
     }
     else dofile(L, NULL);  /* executes stdin as a file */
   }
@@ -484,13 +598,12 @@ int main (int argc, char **argv) {
     l_message(argv[0], "cannot create state: not enough memory");
     return EXIT_FAILURE;
   }
-  /* call 'pmain' in protected mode */
+  lua_pushcfunction(L, &pmain);  /* to call 'pmain' in protected mode */
-  lua_pushcfunction(L, &pmain);
   lua_pushinteger(L, argc);  /* 1st argument */
   lua_pushlightuserdata(L, argv); /* 2nd argument */
-  status = lua_pcall(L, 2, 1, 0);
+  status = lua_pcall(L, 2, 1, 0);  /* do the call */
   result = lua_toboolean(L, -1);  /* get result */
-  finalreport(L, status);
+  report(L, status);
   lua_close(L);
   return (result && status == LUA_OK) ? EXIT_SUCCESS : EXIT_FAILURE;
 }

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.284 2013/02/19 18:39:04 roberto Exp roberto $
+** $Id: lua.h,v 1.318 2014/10/15 14:27:40 roberto Exp roberto $
 ** Lua - A Scripting Language
 ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
 ** See Copyright Notice at the end of this file
@@ -17,13 +17,13 @@
 
 
 #define LUA_VERSION_MAJOR	"5"
-#define LUA_VERSION_MINOR	"2"
+#define LUA_VERSION_MINOR	"3"
-#define LUA_VERSION_NUM		502
+#define LUA_VERSION_NUM		503
-#define LUA_VERSION_RELEASE	"2"
+#define LUA_VERSION_RELEASE	"beta"
 
 #define LUA_VERSION	"Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
 #define LUA_RELEASE	LUA_VERSION "." LUA_VERSION_RELEASE
-#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2013 Lua.org, PUC-Rio"
+#define LUA_COPYRIGHT	LUA_RELEASE "  Copyright (C) 1994-2014 Lua.org, PUC-Rio"
 #define LUA_AUTHORS	"R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
 
 
@@ -53,22 +53,6 @@
 
 typedef struct lua_State lua_State;
 
-typedef int (*lua_CFunction) (lua_State *L);
-
-
-/*
-** functions that read/write blocks when loading/dumping Lua chunks
-*/
-typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
-
-typedef int (*lua_Writer) (lua_State *L, const void* p, size_t sz, void* ud);
-
-
-/*
-** prototype for memory-allocation functions
-*/
-typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
-
 
 /*
 ** basic types
@@ -109,6 +93,34 @@ typedef LUA_INTEGER lua_Integer;
 /* unsigned integer type */
 typedef LUA_UNSIGNED lua_Unsigned;
 
+/* type for continuation-function contexts */
+typedef LUA_KCONTEXT lua_KContext;
+
+
+/*
+** Type for C functions registered with Lua
+*/
+typedef int (*lua_CFunction) (lua_State *L);
+
+/*
+** Type for continuation functions
+*/
+typedef int (*lua_KFunction) (lua_State *L, int status, lua_KContext ctx);
+
+
+/*
+** Type for functions that read/write blocks when loading/dumping Lua chunks
+*/
+typedef const char * (*lua_Reader) (lua_State *L, void *ud, size_t *sz);
+
+typedef int (*lua_Writer) (lua_State *L, const void *p, size_t sz, void *ud);
+
+
+/*
+** Type for memory-allocation functions
+*/
+typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
+
 
 
 /*
@@ -145,9 +157,7 @@ LUA_API int   (lua_absindex) (lua_State *L, int idx);
 LUA_API int   (lua_gettop) (lua_State *L);
 LUA_API void  (lua_settop) (lua_State *L, int idx);
 LUA_API void  (lua_pushvalue) (lua_State *L, int idx);
-LUA_API void  (lua_remove) (lua_State *L, int idx);
+LUA_API void  (lua_rotate) (lua_State *L, int idx, int n);
-LUA_API void  (lua_insert) (lua_State *L, int idx);
-LUA_API void  (lua_replace) (lua_State *L, int idx);
 LUA_API void  (lua_copy) (lua_State *L, int fromidx, int toidx);
 LUA_API int   (lua_checkstack) (lua_State *L, int sz);
 
@@ -161,13 +171,13 @@ LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
 LUA_API int             (lua_isnumber) (lua_State *L, int idx);
 LUA_API int             (lua_isstring) (lua_State *L, int idx);
 LUA_API int             (lua_iscfunction) (lua_State *L, int idx);
+LUA_API int             (lua_isinteger) (lua_State *L, int idx);
 LUA_API int             (lua_isuserdata) (lua_State *L, int idx);
 LUA_API int             (lua_type) (lua_State *L, int idx);
 LUA_API const char     *(lua_typename) (lua_State *L, int tp);
 
 LUA_API lua_Number      (lua_tonumberx) (lua_State *L, int idx, int *isnum);
 LUA_API lua_Integer     (lua_tointegerx) (lua_State *L, int idx, int *isnum);
-LUA_API lua_Unsigned    (lua_tounsignedx) (lua_State *L, int idx, int *isnum);
 LUA_API int             (lua_toboolean) (lua_State *L, int idx);
 LUA_API const char     *(lua_tolstring) (lua_State *L, int idx, size_t *len);
 LUA_API size_t          (lua_rawlen) (lua_State *L, int idx);
@@ -181,13 +191,20 @@ LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
 ** Comparison and arithmetic functions
 */
 
-#define LUA_OPADD	0	/* ORDER TM */
+#define LUA_OPADD	0	/* ORDER TM, ORDER OP */
 #define LUA_OPSUB	1
 #define LUA_OPMUL	2
-#define LUA_OPDIV	3
+#define LUA_OPMOD	3
-#define LUA_OPMOD	4
+#define LUA_OPPOW	4
-#define LUA_OPPOW	5
+#define LUA_OPDIV	5
-#define LUA_OPUNM	6
+#define LUA_OPIDIV	6
+#define LUA_OPBAND	7
+#define LUA_OPBOR	8
+#define LUA_OPBXOR	9
+#define LUA_OPSHL	10
+#define LUA_OPSHR	11
+#define LUA_OPUNM	12
+#define LUA_OPBNOT	13
 
 LUA_API void  (lua_arith) (lua_State *L, int op);
 
@@ -205,7 +222,6 @@ LUA_API int   (lua_compare) (lua_State *L, int idx1, int idx2, int op);
 LUA_API void        (lua_pushnil) (lua_State *L);
 LUA_API void        (lua_pushnumber) (lua_State *L, lua_Number n);
 LUA_API void        (lua_pushinteger) (lua_State *L, lua_Integer n);
-LUA_API void        (lua_pushunsigned) (lua_State *L, lua_Unsigned n);
 LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
 LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
 LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
@@ -220,16 +236,18 @@ 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 int (lua_getglobal) (lua_State *L, const char *var);
-LUA_API void  (lua_gettable) (lua_State *L, int idx);
+LUA_API int (lua_gettable) (lua_State *L, int idx);
-LUA_API void  (lua_getfield) (lua_State *L, int idx, const char *k);
+LUA_API int (lua_getfield) (lua_State *L, int idx, const char *k);
-LUA_API void  (lua_rawget) (lua_State *L, int idx);
+LUA_API int (lua_geti) (lua_State *L, int idx, lua_Integer n);
-LUA_API void  (lua_rawgeti) (lua_State *L, int idx, int n);
+LUA_API int (lua_rawget) (lua_State *L, int idx);
-LUA_API void  (lua_rawgetp) (lua_State *L, int idx, const void *p);
+LUA_API int (lua_rawgeti) (lua_State *L, int idx, lua_Integer n);
+LUA_API int (lua_rawgetp) (lua_State *L, int idx, const void *p);
+
 LUA_API void  (lua_createtable) (lua_State *L, int narr, int nrec);
 LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
 LUA_API int   (lua_getmetatable) (lua_State *L, int objindex);
-LUA_API void  (lua_getuservalue) (lua_State *L, int idx);
+LUA_API int  (lua_getuservalue) (lua_State *L, int idx);
 
 
 /*
@@ -238,8 +256,9 @@ LUA_API void  (lua_getuservalue) (lua_State *L, int idx);
 LUA_API void  (lua_setglobal) (lua_State *L, const char *var);
 LUA_API void  (lua_settable) (lua_State *L, int idx);
 LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
+LUA_API void  (lua_seti) (lua_State *L, int idx, lua_Integer n);
 LUA_API void  (lua_rawset) (lua_State *L, int idx);
-LUA_API void  (lua_rawseti) (lua_State *L, int idx, int n);
+LUA_API void  (lua_rawseti) (lua_State *L, int idx, lua_Integer n);
 LUA_API void  (lua_rawsetp) (lua_State *L, int idx, const void *p);
 LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
 LUA_API void  (lua_setuservalue) (lua_State *L, int idx);
@@ -248,31 +267,31 @@ LUA_API void  (lua_setuservalue) (lua_State *L, int idx);
 /*
 ** 'load' and 'call' functions (load and run Lua code)
 */
-LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults, int ctx,
+LUA_API void  (lua_callk) (lua_State *L, int nargs, int nresults,
-                           lua_CFunction k);
+                           lua_KContext ctx, lua_KFunction k);
 #define lua_call(L,n,r)		lua_callk(L, (n), (r), 0, NULL)
 
-LUA_API int   (lua_getctx) (lua_State *L, int *ctx);
-
 LUA_API int   (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
-                            int ctx, lua_CFunction k);
+                            lua_KContext ctx, lua_KFunction k);
 #define lua_pcall(L,n,r,f)	lua_pcallk(L, (n), (r), (f), 0, NULL)
 
 LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,
                                         const char *chunkname,
                                         const char *mode);
 
-LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
+LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data, int strip);
 
 
 /*
 ** coroutine functions
 */
-LUA_API int  (lua_yieldk) (lua_State *L, int nresults, int ctx,
+LUA_API int  (lua_yieldk) (lua_State *L, int nresults, lua_KContext ctx,
-                           lua_CFunction k);
+                           lua_KFunction k);
 #define lua_yield(L,n)		lua_yieldk(L, (n), 0, NULL)
 LUA_API int  (lua_resume) (lua_State *L, lua_State *from, int narg);
 LUA_API int  (lua_status) (lua_State *L);
+LUA_API int lua_isyieldable (lua_State *L);
+
 
 /*
 ** garbage-collection function and options
@@ -286,10 +305,7 @@ LUA_API int  (lua_status) (lua_State *L);
 #define LUA_GCSTEP		5
 #define LUA_GCSETPAUSE		6
 #define LUA_GCSETSTEPMUL	7
-#define LUA_GCSETMAJORINC	8
 #define LUA_GCISRUNNING		9
-#define LUA_GCGEN		10
-#define LUA_GCINC		11
 
 LUA_API int (lua_gc) (lua_State *L, int what, int data);
 
@@ -305,20 +321,23 @@ LUA_API int   (lua_next) (lua_State *L, int idx);
 LUA_API void  (lua_concat) (lua_State *L, int n);
 LUA_API void  (lua_len)    (lua_State *L, int idx);
 
+LUA_API size_t   (lua_stringtonumber) (lua_State *L, const char *s);
+
 LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
 LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 
 
 
 /*
-** ===============================================================
+** {==============================================================
 ** some useful macros
 ** ===============================================================
 */
 
-#define lua_tonumber(L,i)	lua_tonumberx(L,i,NULL)
+#define lua_getextraspace(L)	((void *)((char *)(L) - LUA_EXTRASPACE))
-#define lua_tointeger(L,i)	lua_tointegerx(L,i,NULL)
+
-#define lua_tounsigned(L,i)	lua_tounsignedx(L,i,NULL)
+#define lua_tonumber(L,i)	lua_tonumberx(L,(i),NULL)
+#define lua_tointeger(L,i)	lua_tointegerx(L,(i),NULL)
 
 #define lua_pop(L,n)		lua_settop(L, -(n)-1)
 
@@ -346,6 +365,28 @@ LUA_API void      (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
 #define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)
 
 
+#define lua_insert(L,idx)	lua_rotate(L, (idx), 1)
+
+#define lua_remove(L,idx)	(lua_rotate(L, (idx), -1), lua_pop(L, 1))
+
+#define lua_replace(L,idx)	(lua_copy(L, -1, (idx)), lua_pop(L, 1))
+
+/* }============================================================== */
+
+
+/*
+** {==============================================================
+** compatibility macros for unsigned conversions
+** ===============================================================
+*/
+#if defined(LUA_COMPAT_APIINTCASTS)
+
+#define lua_pushunsigned(L,n)	lua_pushinteger(L, (lua_Integer)(n))
+#define lua_tounsignedx(L,i,is)	((lua_Integer)lua_tointegerx(L,i,is))
+#define lua_tounsigned(L,i)	lua_tounsignedx(L,(i),NULL)
+
+#endif
+/* }============================================================== */
 
 /*
 ** {======================================================================
@@ -390,7 +431,7 @@ LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
 LUA_API void  (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
                                                int fidx2, int n2);
 
-LUA_API int (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
+LUA_API void (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
 LUA_API lua_Hook (lua_gethook) (lua_State *L);
 LUA_API int (lua_gethookmask) (lua_State *L);
 LUA_API int (lua_gethookcount) (lua_State *L);
@@ -418,7 +459,7 @@ struct lua_Debug {
 
 
 /******************************************************************************
-* Copyright (C) 1994-2013 Lua.org, PUC-Rio.
+* Copyright (C) 1994-2014 Lua.org, PUC-Rio.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the

luaconf.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.175 2013/01/29 16:00:40 roberto Exp roberto $
+** $Id: luaconf.h,v 1.219 2014/10/20 16:32:05 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -8,9 +8,6 @@
 #ifndef lconfig_h
 #define lconfig_h
 
-#include <limits.h>
-#include <stddef.h>
-
 
 /*
 ** ==================================================================
@@ -19,6 +16,45 @@
 */
 
 
+/*
+** {==================================================================
+@@ LUA_INT_INT / LUA_INT_LONG / LUA_INT_LONGLONG defines type for
+@@ Lua integers; you must define one of them.
+@@ LUA_REAL_FLOAT / LUA_REAL_DOUBLE / LUA_REAL_LONGDOUBLE defines
+@@ type for Lua floats. You must define one of them.
+**
+** These definitions set the numeric types for Lua. Lua should work fine
+** with any mix of these previous options.  The usual configurations
+** are 64-bit integers and floats (the default) and 32-bit integers and
+** floats (Small Lua, for restricted platforms).
+**
+** Note that C compilers not compliant with C99 may not have
+** support for 'long long'. In that case, you should not use option
+** 'LUA_INT_LONGLONG'; use instead option 'LUA_32BITS' for Small Lua
+** (see below), or LUA_INT_LONG plus LUA_REAL_DOUBLE for an interpreter
+** with 32-bit integers and double floating-point numbers.
+** =====================================================================
+*/
+
+/*
+** Just uncomment the next line for Small Lua; you can also define
+** LUA_32BITS in the make file, but changing here you ensure that
+** all software connected to Lua will be compiled with the same
+** configuration.
+*/
+/* #define LUA_32BITS */
+
+#if !defined(LUA_32BITS) && !defined(LUA_ANSI)
+#define LUA_INT_LONGLONG
+#define LUA_REAL_DOUBLE
+#else	/* Lua 32 bits */
+#define LUA_INT_LONG
+#define LUA_REAL_FLOAT
+#endif
+
+/* }================================================================== */
+
+
 /*
 @@ LUA_ANSI controls the use of non-ansi features.
 ** CHANGE it (define it) if you want Lua to avoid the use of any
@@ -34,6 +70,7 @@
 #endif
 
 #if defined(LUA_WIN)
+#define	_CRT_SECURE_NO_WARNINGS  /* avoid warnings about ANSI C functions */
 #define LUA_DL_DLL
 #define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
 #endif
@@ -41,71 +78,79 @@
 
 
 #if defined(LUA_USE_LINUX)
+#define LUA_USE_C99
 #define LUA_USE_POSIX
 #define LUA_USE_DLOPEN		/* needs an extra library: -ldl */
 #define LUA_USE_READLINE	/* needs some extra libraries */
-#define LUA_USE_STRTODHEX	/* assume 'strtod' handles hex formats */
-#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
-#define LUA_USE_LONGLONG	/* assume support for long long */
 #endif
 
 #if defined(LUA_USE_MACOSX)
+#define LUA_USE_C99
 #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 hex formats */
-#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
-#define LUA_USE_LONGLONG	/* assume support for long long */
 #endif
 
 
+/*
+@@ LUA_USE_C99 includes all functionality that depends on C 99.
+** CHANGE it (define it) if your system is compatible.
+*/
+#if defined(LUA_USE_C99)
+#define LUA_USE_AFORMAT		/* assume 'printf' handles 'aA' specifiers */
+#endif
+
 
 /*
 @@ LUA_USE_POSIX includes all functionality listed as X/Open System
-@* Interfaces Extension (XSI).
+@@ Interfaces Extension (XSI).
 ** CHANGE it (define it) if your system is XSI compatible.
 */
 #if defined(LUA_USE_POSIX)
-#define LUA_USE_MKSTEMP
-#define LUA_USE_ISATTY
-#define LUA_USE_POPEN
-#define LUA_USE_ULONGJMP
-#define LUA_USE_GMTIME_R
 #endif
 
 
 
+#include <limits.h>
+#include <stddef.h>
+
 /*
 @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
-@* Lua libraries.
+@@ Lua libraries.
 @@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
-@* C libraries.
+@@ C libraries.
 ** CHANGE them if your machine has a non-conventional directory
 ** hierarchy or if you want to install your libraries in
 ** non-conventional directories.
 */
-#if defined(_WIN32)	/* { */
+#define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
+#if defined(_WIN32) 	/* { */
 /*
 ** In Windows, any exclamation mark ('!') in the path is replaced by the
 ** path of the directory of the executable file of the current process.
 */
 #define LUA_LDIR	"!\\lua\\"
 #define LUA_CDIR	"!\\"
+#define LUA_SHRDIR	"!\\..\\share\\lua\\" LUA_VDIR "\\"
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
-		LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" ".\\?.lua"
+		LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua;" \
+                LUA_SHRDIR"?.lua;" LUA_SHRDIR"?\\init.lua;" \
+		".\\?.lua;" ".\\?\\init.lua"
 #define LUA_CPATH_DEFAULT \
-		LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"
+		LUA_CDIR"?.dll;" \
+		LUA_CDIR"..\\lib\\lua\\" LUA_VDIR "\\?.dll;" \
+		LUA_CDIR"loadall.dll;" ".\\?.dll"
 
 #else			/* }{ */
 
-#define LUA_VDIR	LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
 #define LUA_ROOT	"/usr/local/"
-#define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR
+#define LUA_LDIR	LUA_ROOT "share/lua/" LUA_VDIR "/"
-#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR
+#define LUA_CDIR	LUA_ROOT "lib/lua/" LUA_VDIR "/"
 #define LUA_PATH_DEFAULT  \
 		LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
-		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" "./?.lua"
+		LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua;" \
+		"./?.lua;" "./?/init.lua"
 #define LUA_CPATH_DEFAULT \
 		LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
 #endif			/* } */
@@ -162,10 +207,10 @@
 
 /*
 @@ LUAI_FUNC is a mark for all extern functions that are not to be
-@* exported to outside modules.
+@@ exported to outside modules.
 @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
-@* that are not to be exported to outside modules (LUAI_DDEF for
+@@ that are not to be exported to outside modules (LUAI_DDEF for
-@* definitions and LUAI_DDEC for declarations).
+@@ definitions and LUAI_DDEC for declarations).
 ** CHANGE them if you need to mark them in some special way. Elf/gcc
 ** (versions 3.2 and later) mark them as "hidden" to optimize access
 ** when Lua is compiled as a shared library. Not all elf targets support
@@ -188,9 +233,18 @@
 
 
 
+/*
+@@ LUA_EXTRASPACE defines the size of a raw memory area associated with
+** a Lua state with very fast access.
+** CHANGE it if you need a different size.
+*/
+#define LUA_EXTRASPACE		(sizeof(void *))
+
+
 /*
 @@ LUA_QL describes how error messages quote program elements.
-** CHANGE it if you want a different appearance.
+** Lua does not use these macros anymore; they are here for
+** compatibility only.
 */
 #define LUA_QL(x)	"'" x "'"
 #define LUA_QS		LUA_QL("%s")
@@ -198,7 +252,7 @@
 
 /*
 @@ LUA_IDSIZE gives the maximum size for the description of the source
-@* of a function in debug information.
+@@ of a function in debug information.
 ** CHANGE it if you want a different size.
 */
 #define LUA_IDSIZE	60
@@ -206,14 +260,10 @@
 
 /*
 @@ luai_writestring/luai_writeline define how 'print' prints its results.
-** They are only used in libraries and the stand-alone program. (The #if
+** They are only used in libraries and the stand-alone program.
-** 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.
@@ -232,6 +282,23 @@
 #define LUAI_MAXSHORTLEN        40
 
 
+/*
+@@ LUA_KCONTEXT is the type of the context ('ctx') for continuation
+@@ functions.  It must be a numerical type; Lua will use 'intptr_t' if
+@@ available.
+*/
+#if defined (LUA_USE_C99)
+#include <stdint.h>
+#if defined (INTPTR_MAX)  /* even in C99 this type is optional */
+#define LUA_KCONTEXT	intptr_t
+#endif
+#endif
+
+#if !defined(LUA_KCONTEXT)
+/* default definition (the nearest thing to 'intptr_t' in C89) */
+#define LUA_KCONTEXT	ptrdiff_t
+#endif
+
 
 /*
 ** {==================================================================
@@ -240,11 +307,49 @@
 */
 
 /*
-@@ LUA_COMPAT_ALL controls all compatibility options.
+@@ LUA_COMPAT_5_2 controls other macros for compatibility with Lua 5.2.
+@@ LUA_COMPAT_5_1 controls other macros for compatibility with Lua 5.1.
 ** You can define it to get all options, or change specific options
 ** to fit your specific needs.
 */
-#if defined(LUA_COMPAT_ALL)	/* { */
+#if defined(LUA_COMPAT_5_2)	/* { */
+
+/*
+@@ LUA_COMPAT_MATHLIB controls the presence of several deprecated
+** functions in the mathematical library.
+*/
+#define LUA_COMPAT_MATHLIB
+
+/*
+@@ LUA_COMPAT_BITLIB controls the presence of library 'bit32'.
+*/
+#define LUA_COMPAT_BITLIB
+
+/*
+@@ LUA_COMPAT_IPAIRS controls the effectiveness of the __ipairs metamethod.
+*/
+#define LUA_COMPAT_IPAIRS
+
+/*
+@@ LUA_COMPAT_APIINTCASTS controls the presence of macros for
+** manipulating other integer types (lua_pushunsigned, lua_tounsigned,
+** luaL_checkint, luaL_checklong, etc.)
+*/
+#define LUA_COMPAT_APIINTCASTS
+
+
+/*
+@@ LUA_COMPAT_FLOATSTRING makes Lua format integral floats without a
+@@ a float mark ('.0').
+** This macro is not on by default even in compatibility mode,
+** because this is not really an incompatibility.
+*/
+/* #define LUA_COMPAT_FLOATSTRING */
+
+#endif				/* } */
+
+
+#if defined(LUA_COMPAT_5_1)	/* { */
 
 /*
 @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
@@ -328,9 +433,9 @@
 /*
 @@ LUA_INT32 is an signed integer with exactly 32 bits.
 @@ LUAI_UMEM is an unsigned integer big enough to count the total
-@* memory used by Lua.
+@@ memory used by Lua.
 @@ LUAI_MEM is a signed integer big enough to count the total memory
-@* used by Lua.
+@@ used by Lua.
 ** CHANGE here if for some weird reason the default definitions are not
 ** good enough for your machine. Probably you do not need to change
 ** this.
@@ -350,7 +455,7 @@
 /*
 @@ LUAI_MAXSTACK limits the size of the Lua stack.
 ** CHANGE it if you need a different limit. This limit is arbitrary;
-** its only purpose is to stop Lua to consume unlimited stack
+** its only purpose is to stop Lua from consuming unlimited stack
 ** space (and to reserve some numbers for pseudo-indices).
 */
 #if LUAI_BITSINT >= 32
@@ -372,69 +477,115 @@
 #define LUAL_BUFFERSIZE		BUFSIZ
 
 
-
-
 /*
 ** {==================================================================
-@@ LUA_NUMBER is the type of numbers in Lua.
+** Configuration for Numbers.
-** CHANGE the following definitions only if you want to build Lua
+** Change these definitions if no predefined LUA_REAL_* / LUA_INT_*
-** with a number type different from double. You may also need to
+** satisfy your needs.
-** change lua_number2int & lua_number2integer.
 ** ===================================================================
 */
 
-#define LUA_NUMBER_DOUBLE
-#define LUA_NUMBER	double
-
 /*
+@@ LUA_NUMBER is the floating-point type used by Lua.
+**
 @@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
-@* over a number.
+@@ over a floating number.
+**
+@@ LUA_NUMBER_FRMLEN is the length modifier for writing floats.
+@@ LUA_NUMBER_FMT is the format for writing floats.
+@@ lua_number2str converts a float to a string.
+**
+@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
+**
+@@ lua_str2number converts a decimal numeric string to a number.
 */
+
+#if defined(LUA_REAL_FLOAT)		/* { single float */
+
+#define LUA_NUMBER	float
+
 #define LUAI_UACNUMBER	double
 
+#define LUA_NUMBER_FRMLEN	""
+#define LUA_NUMBER_FMT		"%.7g"
 
-/*
+#define l_mathop(op)		op##f
-@@ LUA_NUMBER_SCAN is the format for reading numbers.
+
-@@ LUA_NUMBER_FMT is the format for writing numbers.
+#define lua_str2number(s,p)	strtof((s), (p))
-@@ lua_number2str converts a number to a string.
+
-@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
+
-*/
+#elif defined(LUA_REAL_LONGDOUBLE)	/* }{ long double */
-#define LUA_NUMBER_SCAN		"%lf"
+
+#define LUA_NUMBER	long double
+
+#define LUAI_UACNUMBER	long double
+
+#define LUA_NUMBER_FRMLEN	"L"
+#define LUA_NUMBER_FMT		"%.19Lg"
+
+#define l_mathop(op)		op##l
+
+#define lua_str2number(s,p)	strtold((s), (p))
+
+#elif defined(LUA_REAL_DOUBLE)		/* }{ double */
+
+#define LUA_NUMBER	double
+
+#define LUAI_UACNUMBER	double
+
+#define LUA_NUMBER_FRMLEN	""
 #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 */
 
+#define l_mathop(op)		op
 
-/*
-@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
-*/
-#define l_mathop(x)		(x)
-
-
-/*
-@@ lua_str2number converts a decimal numeric string to a number.
-@@ lua_strx2number converts an hexadecimal numeric string to a number.
-** In C99, 'strtod' does both conversions. C89, however, has no function
-** to convert floating hexadecimal strings to numbers. For these
-** systems, you can leave 'lua_strx2number' undefined and Lua will
-** provide its own implementation.
-*/
 #define lua_str2number(s,p)	strtod((s), (p))
 
-#if defined(LUA_USE_STRTODHEX)
+#else					/* }{ */
-#define lua_strx2number(s,p)	strtod((s), (p))
+
+#error "numeric real type not defined"
+
+#endif					/* } */
+
+
+#if !defined(LUA_USE_C99)
+/* 'strtof' and 'opf' variants for math functions are C99 */
+#undef l_mathop
+#undef lua_str2number
+#define l_mathop(op)		(lua_Number)op
+#define lua_str2number(s,p)	((lua_Number)strtod((s), (p)))
 #endif
 
 
+#define l_floor(x)		(l_mathop(floor)(x))
+
+#define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
+
+
+/*
+@@ lua_numtointeger converts a float number to an integer, or
+** returns 0 if float is not within the range of a lua_Integer.
+** (The range comparisons are tricky because of rounding. The tests
+** here assume a two-complement representation, where MININTEGER always
+** has an exact representation as a float; MAXINTEGER may not have one,
+** and therefore its conversion to float may have an ill-defined value.)
+*/
+#define lua_numtointeger(n,p) \
+  ((n) >= (LUA_NUMBER)(LUA_MININTEGER) && \
+   (n) < -(LUA_NUMBER)(LUA_MININTEGER) && \
+      (*(p) = (LUA_INTEGER)(n), 1))
+
+
 /*
 @@ The luai_num* macros define the primitive operations over numbers.
+** They should work for any size of floating numbers.
 */
 
 /* the following operations need the math library */
 #if defined(lobject_c) || defined(lvm_c)
 #include <math.h>
-#define luai_nummod(L,a,b)	((a) - l_mathop(floor)((a)/(b))*(b))
+#define luai_nummod(L,a,b,m)  \
-#define luai_numpow(L,a,b)	(l_mathop(pow)(a,b))
+  { (m) = l_mathop(fmod)(a,b); if ((m) != 0 && (a)*(b) < 0) (m) += (b); }
+#define luai_numpow(L,a,b)	((void)L, l_mathop(pow)(a,b))
 #endif
 
 /* these are quite standard operations */
@@ -445,93 +596,116 @@
 #define luai_numdiv(L,a,b)	((a)/(b))
 #define luai_numunm(L,a)	(-(a))
 #define luai_numeq(a,b)		((a)==(b))
-#define luai_numlt(L,a,b)	((a)<(b))
+#define luai_numlt(a,b)		((a)<(b))
-#define luai_numle(L,a,b)	((a)<=(b))
+#define luai_numle(a,b)		((a)<=(b))
-#define luai_numisnan(L,a)	(!luai_numeq((a), (a)))
+#define luai_numisnan(a)	(!luai_numeq((a), (a)))
 #endif
 
 
-
 /*
-@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
+** The following macro checks whether an operation is not safe to be
-** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
+** performed by the constant folder. It should result in zero only if
-** machines, ptrdiff_t gives a good choice between int or long.)
+** the operation is safe.
 */
-#define LUA_INTEGER	ptrdiff_t
+#define luai_numinvalidop(op,a,b)	0
-
-/*
-@@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
-** It must have at least 32 bits.
-*/
-#define LUA_UNSIGNED	unsigned LUA_INT32
-
 
 
 /*
-** Some tricks with doubles
+@@ LUA_INTEGER is the integer type used by Lua.
+**
+@@ LUA_UNSIGNED is the unsigned version of LUA_INTEGER.
+**
+@@ LUAI_UACINT is the result of an 'usual argument conversion'
+@@ over a lUA_INTEGER.
+@@ LUA_INTEGER_FRMLEN is the length modifier for reading/writing integers.
+@@ LUA_INTEGER_FMT is the format for writing integers.
+@@ LUA_MAXINTEGER is the maximum value for a LUA_INTEGER.
+@@ LUA_MININTEGER is the minimum value for a LUA_INTEGER.
+@@ lua_integer2str converts an integer to a string.
 */
 
-#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI)	/* { */
+
+/* The following definitions are good for most cases here */
+
+#define LUA_INTEGER_FMT		"%" LUA_INTEGER_FRMLEN "d"
+#define lua_integer2str(s,n)	sprintf((s), LUA_INTEGER_FMT, (n))
+
+#define LUAI_UACINT		LUA_INTEGER
+
 /*
-** The next definitions activate some tricks to speed up the
+** use LUAI_UACINT here to avoid problems with promotions (which
-** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
+** can turn a comparison between unsigneds into a signed comparison)
-**
+*/
-@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
+#define LUA_UNSIGNED		unsigned LUAI_UACINT
-** DirectX idiosyncrasy.
+
-**
+
-@@ LUA_IEEE754TRICK uses a trick that should work on any machine
+/* now the variable definitions */
-** using IEEE754 with a 32-bit integer type.
+
-**
+#if defined(LUA_INT_INT)		/* { int */
-@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
+
-** defined when LUA_INTEGER is a 32-bit integer.
+#define LUA_INTEGER		int
-**
+#define LUA_INTEGER_FRMLEN	""
-@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
+
-** (0 for little endian, 1 for big endian); if not defined, Lua will
+#define LUA_MAXINTEGER		INT_MAX
-** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
+#define LUA_MININTEGER		INT_MIN
-**
+
-@@ LUA_NANTRICK controls the use of a trick to pack all types into
+#elif defined(LUA_INT_LONG)	/* }{ long */
-** a single double value, using NaN values to represent non-number
+
-** values. The trick only works on 32-bit machines (ints and pointers
+#define LUA_INTEGER		long
-** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
+#define LUA_INTEGER_FRMLEN	"l"
-** with conventional endianess (12345678 or 87654321), in CPUs that do
+
-** not produce signaling NaN values (all NaNs are quiet).
+#define LUA_MAXINTEGER		LONG_MAX
+#define LUA_MININTEGER		LONG_MIN
+
+#elif defined(LUA_INT_LONGLONG)	/* }{ long long */
+
+#if defined(_WIN32)
+
+#define LUA_INTEGER		__int64
+#define LUA_INTEGER_FRMLEN	"I64"
+
+#define LUA_MAXINTEGER		_I64_MAX
+#define LUA_MININTEGER		_I64_MIN
+
+#else
+
+#if !defined(LLONG_MAX)
+#error "Compiler does not support 'long long'. See file 'luaconf.h' line 24"
+#endif
+
+#define LUA_INTEGER		long long
+#define LUA_INTEGER_FRMLEN	"ll"
+
+#define LUA_MAXINTEGER		LLONG_MAX
+#define LUA_MININTEGER		LLONG_MIN
+
+#endif
+
+#elif defined(LUA_INT_SHORT)	/* }{ short int */
+/*
+** this option is for tests only; it is not particularly useful and
+** it does not pass the test suit.
 */
 
-/* Microsoft compiler on a Pentium (32 bit) ? */
+#define LUA_INTEGER		short int
-#if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86)	/* { */
+#define LUA_INTEGER_FRMLEN	""
 
-#define LUA_MSASMTRICK
+#define LUA_MAXINTEGER		SHRT_MAX
-#define LUA_IEEEENDIAN		0
+#define LUA_MININTEGER		SHRT_MIN
-#define LUA_NANTRICK
 
+#undef  LUAI_UACINT
+#define LUAI_UACINT		int
 
-/* pentium 32 bits? */
+#undef  LUAI_MAXSTACK
-#elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
+#define LUAI_MAXSTACK           15000
 
-#define LUA_IEEE754TRICK
+#define l_castS2U(x)		((LUA_UNSIGNED)(unsigned short)(x))
-#define LUA_IEEELL
-#define LUA_IEEEENDIAN		0
-#define LUA_NANTRICK
 
-/* pentium 64 bits? */
+#else				/* }{ */
-#elif defined(__x86_64)						/* }{ */
 
-#define LUA_IEEE754TRICK
+#error "numeric integer type not defined"
-#define LUA_IEEEENDIAN		0
 
-#elif defined(__POWERPC__) || defined(__ppc__)			/* }{ */
+#endif				/* } */
-
-#define LUA_IEEE754TRICK
-#define LUA_IEEEENDIAN		1
-
-#else								/* }{ */
-
-/* assume IEEE754 and a 32-bit integer type */
-#define LUA_IEEE754TRICK
-
-#endif								/* } */
-
-#endif							/* } */
 
 /* }================================================================== */
 
@@ -547,5 +721,7 @@
 
 
 
+
+
 #endif
 

lualib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h,v 1.42 2011/05/25 14:12:28 roberto Exp roberto $
+** $Id: lualib.h,v 1.43 2011/12/08 12:11:37 roberto Exp roberto $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -29,6 +29,9 @@ LUAMOD_API int (luaopen_os) (lua_State *L);
 #define LUA_STRLIBNAME	"string"
 LUAMOD_API int (luaopen_string) (lua_State *L);
 
+#define LUA_UTF8LIBNAME	"utf8"
+LUAMOD_API int (luaopen_utf8) (lua_State *L);
+
 #define LUA_BITLIBNAME	"bit32"
 LUAMOD_API int (luaopen_bit32) (lua_State *L);
 

lundump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c,v 2.21 2012/03/19 22:58:09 roberto Exp roberto $
+** $Id: lundump.c,v 2.39 2014/06/18 18:35:43 roberto Exp roberto $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -20,239 +20,255 @@
 #include "lundump.h"
 #include "lzio.h"
 
-typedef struct {
- lua_State* L;
- ZIO* Z;
- Mbuffer* b;
- const char* name;
-} LoadState;
-
-static l_noret error(LoadState* S, const char* why)
-{
- luaO_pushfstring(S->L,"%s: %s precompiled chunk",S->name,why);
- luaD_throw(S->L,LUA_ERRSYNTAX);
-}
-
-#define LoadMem(S,b,n,size)	LoadBlock(S,b,(n)*(size))
-#define LoadByte(S)		(lu_byte)LoadChar(S)
-#define LoadVar(S,x)		LoadMem(S,&x,1,sizeof(x))
-#define LoadVector(S,b,n,size)	LoadMem(S,b,n,size)
 
 #if !defined(luai_verifycode)
-#define luai_verifycode(L,b,f)	/* empty */
+#define luai_verifycode(L,b,f)  /* empty */
 #endif
 
-static void LoadBlock(LoadState* S, void* b, size_t size)
+
-{
+typedef struct {
- if (luaZ_read(S->Z,b,size)!=0) error(S,"truncated");
+  lua_State *L;
+  ZIO *Z;
+  Mbuffer *b;
+  const char *name;
+} LoadState;
+
+
+static l_noret error(LoadState *S, const char *why) {
+  luaO_pushfstring(S->L, "%s: %s precompiled chunk", S->name, why);
+  luaD_throw(S->L, LUA_ERRSYNTAX);
 }
 
-static int LoadChar(LoadState* S)
+
-{
+/*
- char x;
+** All high-level loads go through LoadVector; you can change it to
- LoadVar(S,x);
+** adapt to the endianness of the input
- return x;
+*/
+#define LoadVector(S,b,n)	LoadBlock(S,b,(n)*sizeof((b)[0]))
+
+static void LoadBlock (LoadState *S, void *b, size_t size) {
+  if (luaZ_read(S->Z, b, size) != 0)
+    error(S, "truncated");
 }
 
-static int LoadInt(LoadState* S)
+
-{
+#define LoadVar(S,x)		LoadVector(S,&x,1)
- int x;
+
- LoadVar(S,x);
+
- if (x<0) error(S,"corrupted");
+static lu_byte LoadByte (LoadState *S) {
- return x;
+  lu_byte x;
+  LoadVar(S, x);
+  return x;
 }
 
-static lua_Number LoadNumber(LoadState* S)
+
-{
+static int LoadInt (LoadState *S) {
- lua_Number x;
+  int x;
- LoadVar(S,x);
+  LoadVar(S, x);
- return x;
+  return x;
 }
 
-static TString* LoadString(LoadState* S)
+
-{
+static lua_Number LoadNumber (LoadState *S) {
- size_t size;
+  lua_Number x;
- LoadVar(S,size);
+  LoadVar(S, x);
- if (size==0)
+  return x;
-  return NULL;
- else
- {
-  char* s=luaZ_openspace(S->L,S->b,size);
-  LoadBlock(S,s,size*sizeof(char));
-  return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */
- }
 }
 
-static void LoadCode(LoadState* S, Proto* f)
+
-{
+static lua_Integer LoadInteger (LoadState *S) {
- int n=LoadInt(S);
+  lua_Integer x;
- f->code=luaM_newvector(S->L,n,Instruction);
+  LoadVar(S, x);
- f->sizecode=n;
+  return x;
- LoadVector(S,f->code,n,sizeof(Instruction));
 }
 
-static void LoadFunction(LoadState* S, Proto* f);
 
-static void LoadConstants(LoadState* S, Proto* f)
+static TString *LoadString (LoadState *S) {
-{
+  size_t size = LoadByte(S);
- int i,n;
+  if (size == 0xFF)
- n=LoadInt(S);
+    LoadVar(S, size);
- f->k=luaM_newvector(S->L,n,TValue);
+  if (size == 0)
- f->sizek=n;
+    return NULL;
- for (i=0; i<n; i++) setnilvalue(&f->k[i]);
+  else {
- for (i=0; i<n; i++)
+    char *s = luaZ_openspace(S->L, S->b, --size);
- {
+    LoadVector(S, s, size);
-  TValue* o=&f->k[i];
+    return luaS_newlstr(S->L, s, size);
-  int t=LoadChar(S);
-  switch (t)
-  {
-   case LUA_TNIL:
-	setnilvalue(o);
-	break;
-   case LUA_TBOOLEAN:
-	setbvalue(o,LoadChar(S));
-	break;
-   case LUA_TNUMBER:
-	setnvalue(o,LoadNumber(S));
-	break;
-   case LUA_TSTRING:
-	setsvalue2n(S->L,o,LoadString(S));
-	break;
-    default: lua_assert(0);
   }
- }
- n=LoadInt(S);
- f->p=luaM_newvector(S->L,n,Proto*);
- f->sizep=n;
- for (i=0; i<n; i++) f->p[i]=NULL;
- for (i=0; i<n; i++)
- {
-  f->p[i]=luaF_newproto(S->L);
-  LoadFunction(S,f->p[i]);
- }
 }
 
-static void LoadUpvalues(LoadState* S, Proto* f)
+
-{
+static void LoadCode (LoadState *S, Proto *f) {
- int i,n;
+  int n = LoadInt(S);
- n=LoadInt(S);
+  f->code = luaM_newvector(S->L, n, Instruction);
- f->upvalues=luaM_newvector(S->L,n,Upvaldesc);
+  f->sizecode = n;
- f->sizeupvalues=n;
+  LoadVector(S, f->code, n);
- for (i=0; i<n; i++) f->upvalues[i].name=NULL;
- for (i=0; i<n; i++)
- {
-  f->upvalues[i].instack=LoadByte(S);
-  f->upvalues[i].idx=LoadByte(S);
- }
 }
 
-static void LoadDebug(LoadState* S, Proto* f)
+
-{
+static void LoadFunction(LoadState *S, Proto *f, TString *psource);
- int i,n;
+
- f->source=LoadString(S);
+
- n=LoadInt(S);
+static void LoadConstants (LoadState *S, Proto *f) {
- f->lineinfo=luaM_newvector(S->L,n,int);
+  int i;
- f->sizelineinfo=n;
+  int n = LoadInt(S);
- LoadVector(S,f->lineinfo,n,sizeof(int));
+  f->k = luaM_newvector(S->L, n, TValue);
- n=LoadInt(S);
+  f->sizek = n;
- f->locvars=luaM_newvector(S->L,n,LocVar);
+  for (i = 0; i < n; i++)
- f->sizelocvars=n;
+    setnilvalue(&f->k[i]);
- for (i=0; i<n; i++) f->locvars[i].varname=NULL;
+  for (i = 0; i < n; i++) {
- for (i=0; i<n; i++)
+    TValue *o = &f->k[i];
- {
+    int t = LoadByte(S);
-  f->locvars[i].varname=LoadString(S);
+    switch (t) {
-  f->locvars[i].startpc=LoadInt(S);
+    case LUA_TNIL:
-  f->locvars[i].endpc=LoadInt(S);
+      setnilvalue(o);
- }
+      break;
- n=LoadInt(S);
+    case LUA_TBOOLEAN:
- for (i=0; i<n; i++) f->upvalues[i].name=LoadString(S);
+      setbvalue(o, LoadByte(S));
+      break;
+    case LUA_TNUMFLT:
+      setfltvalue(o, LoadNumber(S));
+      break;
+    case LUA_TNUMINT:
+      setivalue(o, LoadInteger(S));
+      break;
+    case LUA_TSHRSTR:
+    case LUA_TLNGSTR:
+      setsvalue2n(S->L, o, LoadString(S));
+      break;
+    default:
+      lua_assert(0);
+    }
+  }
 }
 
-static void LoadFunction(LoadState* S, Proto* f)
+
-{
+static void LoadProtos (LoadState *S, Proto *f) {
- f->linedefined=LoadInt(S);
+  int i;
- f->lastlinedefined=LoadInt(S);
+  int n = LoadInt(S);
- f->numparams=LoadByte(S);
+  f->p = luaM_newvector(S->L, n, Proto *);
- f->is_vararg=LoadByte(S);
+  f->sizep = n;
- f->maxstacksize=LoadByte(S);
+  for (i = 0; i < n; i++)
- LoadCode(S,f);
+    f->p[i] = NULL;
- LoadConstants(S,f);
+  for (i = 0; i < n; i++) {
- LoadUpvalues(S,f);
+    f->p[i] = luaF_newproto(S->L);
- LoadDebug(S,f);
+    LoadFunction(S, f->p[i], f->source);
+  }
 }
 
-/* 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)
+static void LoadUpvalues (LoadState *S, Proto *f) {
-{
+  int i, n;
- lu_byte h[LUAC_HEADERSIZE];
+  n = LoadInt(S);
- lu_byte s[LUAC_HEADERSIZE];
+  f->upvalues = luaM_newvector(S->L, n, Upvaldesc);
- luaU_header(h);
+  f->sizeupvalues = n;
- memcpy(s,h,sizeof(char));			/* first char already read */
+  for (i = 0; i < n; i++)
- LoadBlock(S,s+sizeof(char),LUAC_HEADERSIZE-sizeof(char));
+    f->upvalues[i].name = NULL;
- if (memcmp(h,s,N0)==0) return;
+  for (i = 0; i < n; i++) {
- if (memcmp(h,s,N1)!=0) error(S,"not a");
+    f->upvalues[i].instack = LoadByte(S);
- if (memcmp(h,s,N2)!=0) error(S,"version mismatch in");
+    f->upvalues[i].idx = LoadByte(S);
- if (memcmp(h,s,N3)!=0) error(S,"incompatible"); else error(S,"corrupted");
+  }
 }
 
+
+static void LoadDebug (LoadState *S, Proto *f) {
+  int i, n;
+  n = LoadInt(S);
+  f->lineinfo = luaM_newvector(S->L, n, int);
+  f->sizelineinfo = n;
+  LoadVector(S, f->lineinfo, n);
+  n = LoadInt(S);
+  f->locvars = luaM_newvector(S->L, n, LocVar);
+  f->sizelocvars = n;
+  for (i = 0; i < n; i++)
+    f->locvars[i].varname = NULL;
+  for (i = 0; i < n; i++) {
+    f->locvars[i].varname = LoadString(S);
+    f->locvars[i].startpc = LoadInt(S);
+    f->locvars[i].endpc = LoadInt(S);
+  }
+  n = LoadInt(S);
+  for (i = 0; i < n; i++)
+    f->upvalues[i].name = LoadString(S);
+}
+
+
+static void LoadFunction (LoadState *S, Proto *f, TString *psource) {
+  f->source = LoadString(S);
+  if (f->source == NULL)  /* no source in dump? */
+    f->source = psource;  /* reuse parent's source */
+  f->linedefined = LoadInt(S);
+  f->lastlinedefined = LoadInt(S);
+  f->numparams = LoadByte(S);
+  f->is_vararg = LoadByte(S);
+  f->maxstacksize = LoadByte(S);
+  LoadCode(S, f);
+  LoadConstants(S, f);
+  LoadUpvalues(S, f);
+  LoadProtos(S, f);
+  LoadDebug(S, f);
+}
+
+
+static void checkliteral (LoadState *S, const char *s, const char *msg) {
+  char buff[sizeof(LUA_SIGNATURE) + sizeof(LUAC_DATA)]; /* larger than both */
+  size_t len = strlen(s);
+  LoadVector(S, buff, len);
+  if (memcmp(s, buff, len) != 0)
+    error(S, msg);
+}
+
+
+static void fchecksize (LoadState *S, size_t size, const char *tname) {
+  if (LoadByte(S) != size)
+    error(S, luaO_pushfstring(S->L, "%s size mismatch in", tname));
+}
+
+
+#define checksize(S,t)	fchecksize(S,sizeof(t),#t)
+
+static void checkHeader (LoadState *S) {
+  checkliteral(S, LUA_SIGNATURE + 1, "not a");  /* 1st char already checked */
+  if (LoadByte(S) != LUAC_VERSION)
+    error(S, "version mismatch in");
+  if (LoadByte(S) != LUAC_FORMAT)
+    error(S, "format mismatch in");
+  checkliteral(S, LUAC_DATA, "corrupted");
+  checksize(S, int);
+  checksize(S, size_t);
+  checksize(S, Instruction);
+  checksize(S, lua_Integer);
+  checksize(S, lua_Number);
+  if (LoadInteger(S) != LUAC_INT)
+    error(S, "endianness mismatch in");
+  if (LoadNumber(S) != LUAC_NUM)
+    error(S, "float format mismatch in");
+}
+
+
 /*
 ** load precompiled chunk
 */
-Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
+LClosure *luaU_undump(lua_State *L, ZIO *Z, Mbuffer *buff,
-{
+                      const char *name) {
- LoadState S;
+  LoadState S;
- Closure* cl;
+  LClosure *cl;
- if (*name=='@' || *name=='=')
+  if (*name == '@' || *name == '=')
-  S.name=name+1;
+    S.name = name + 1;
- else if (*name==LUA_SIGNATURE[0])
+  else if (*name == LUA_SIGNATURE[0])
-  S.name="binary string";
+    S.name = "binary string";
- else
+  else
-  S.name=name;
+    S.name = name;
- S.L=L;
+  S.L = L;
- S.Z=Z;
+  S.Z = Z;
- S.b=buff;
+  S.b = buff;
- LoadHeader(&S);
+  checkHeader(&S);
- cl=luaF_newLclosure(L,1);
+  cl = luaF_newLclosure(L, LoadByte(&S));
- setclLvalue(L,L->top,cl); incr_top(L);
+  setclLvalue(L, L->top, cl);
- cl->l.p=luaF_newproto(L);
+  incr_top(L);
- LoadFunction(&S,cl->l.p);
+  cl->p = luaF_newproto(L);
- if (cl->l.p->sizeupvalues != 1)
+  LoadFunction(&S, cl->p, NULL);
- {
+  lua_assert(cl->nupvalues == cl->p->sizeupvalues);
-  Proto* p=cl->l.p;
+  luai_verifycode(L, buff, cl->p);
-  cl=luaF_newLclosure(L,cl->l.p->sizeupvalues);
+  return cl;
-  cl->l.p=p;
-  setclLvalue(L,L->top-1,cl);
- }
- luai_verifycode(L,buff,cl->l.p);
- return cl;
 }
 
-#define MYINT(s)	(s[0]-'0')
-#define VERSION		MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR)
-#define FORMAT		0		/* this is the official format */
-
-/*
-* make header for precompiled chunks
-* if you change the code below be sure to update LoadHeader and FORMAT above
-* and LUAC_HEADERSIZE in lundump.h
-*/
-void luaU_header (lu_byte* h)
-{
- int x=1;
- memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-sizeof(char));
- h+=sizeof(LUA_SIGNATURE)-sizeof(char);
- *h++=cast_byte(VERSION);
- *h++=cast_byte(FORMAT);
- *h++=cast_byte(*(char*)&x);			/* endianness */
- *h++=cast_byte(sizeof(int));
- *h++=cast_byte(sizeof(size_t));
- *h++=cast_byte(sizeof(Instruction));
- *h++=cast_byte(sizeof(lua_Number));
- *h++=cast_byte(((lua_Number)0.5)==0);		/* is lua_Number integral? */
- memcpy(h,LUAC_TAIL,sizeof(LUAC_TAIL)-sizeof(char));
-}

lundump.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.38 2011/05/17 12:42:43 roberto Exp roberto $
+** $Id: lundump.h,v 1.43 2014/04/15 14:28:20 roberto Exp roberto $
 ** load precompiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -7,22 +7,27 @@
 #ifndef lundump_h
 #define lundump_h
 
+#include "llimits.h"
 #include "lobject.h"
 #include "lzio.h"
 
-/* load one chunk; from lundump.c */
-LUAI_FUNC Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
-
-/* make header; from lundump.c */
-LUAI_FUNC void luaU_header (lu_byte* h);
-
-/* dump one chunk; from ldump.c */
-LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip);
 
 /* data to catch conversion errors */
-#define LUAC_TAIL		"\x19\x93\r\n\x1a\n"
+#define LUAC_DATA	"\x19\x93\r\n\x1a\n"
 
-/* size in bytes of header of binary files */
+#define LUAC_INT	0x5678
-#define LUAC_HEADERSIZE		(sizeof(LUA_SIGNATURE)-sizeof(char)+2+6+sizeof(LUAC_TAIL)-sizeof(char))
+#define LUAC_NUM	cast_num(370.5)
+
+#define MYINT(s)	(s[0]-'0')
+#define LUAC_VERSION	(MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR))
+#define LUAC_FORMAT	0	/* this is the official format */
+
+/* load one chunk; from lundump.c */
+LUAI_FUNC LClosure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff,
+                                 const char* name);
+
+/* dump one chunk; from ldump.c */
+LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w,
+                         void* data, int strip);
 
 #endif

lutf8lib.c

@@ -0,0 +1,253 @@
+/*
+** $Id: lutf8lib.c,v 1.11 2014/10/01 11:52:33 roberto Exp roberto $
+** Standard library for UTF-8 manipulation
+** See Copyright Notice in lua.h
+*/
+
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lutf8lib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+#define MAXUNICODE	0x10FFFF
+
+#define iscont(p)	((*(p) & 0xC0) == 0x80)
+
+
+/* from strlib */
+/* translate a relative string position: negative means back from end */
+static lua_Integer u_posrelat (lua_Integer pos, size_t len) {
+  if (pos >= 0) return pos;
+  else if (0u - (size_t)pos > len) return 0;
+  else return (lua_Integer)len + pos + 1;
+}
+
+
+/*
+** Decode one UTF-8 sequence, returning NULL if byte sequence is invalid.
+*/
+static const char *utf8_decode (const char *o, int *val) {
+  static unsigned int limits[] = {0xFF, 0x7F, 0x7FF, 0xFFFF};
+  const unsigned char *s = (const unsigned char *)o;
+  unsigned int c = s[0];
+  unsigned int res = 0;  /* final result */
+  if (c < 0x80)  /* ascii? */
+    res = c;
+  else {
+    int count = 0;  /* to count number of continuation bytes */
+    while (c & 0x40) {  /* still have continuation bytes? */
+      int cc = s[++count];  /* read next byte */
+      if ((cc & 0xC0) != 0x80)  /* not a continuation byte? */
+        return NULL;  /* invalid byte sequence */
+      res = (res << 6) | (cc & 0x3F);  /* add lower 6 bits from cont. byte */
+      c <<= 1;  /* to test next bit */
+    }
+    res |= ((c & 0x7F) << (count * 5));  /* add first byte */
+    if (count > 3 || res > MAXUNICODE || res <= limits[count])
+      return NULL;  /* invalid byte sequence */
+    s += count;  /* skip continuation bytes read */
+  }
+  if (val) *val = res;
+  return (const char *)s + 1;  /* +1 to include first byte */
+}
+
+
+/*
+** utf8len(s [, i [, j]]) --> number of characters that start in the
+** range [i,j], or nil + current position if 's' is not well formed in
+** that interval
+*/
+static int utflen (lua_State *L) {
+  int n = 0;
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
+  lua_Integer posj = u_posrelat(luaL_optinteger(L, 3, -1), len);
+  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 2,
+                   "initial position out of string");
+  luaL_argcheck(L, --posj < (lua_Integer)len, 3,
+                   "final position out of string");
+  while (posi <= posj) {
+    const char *s1 = utf8_decode(s + posi, NULL);
+    if (s1 == NULL) {  /* conversion error? */
+      lua_pushnil(L);  /* return nil ... */
+      lua_pushinteger(L, posi + 1);  /* ... and current position */
+      return 2;
+    }
+    posi = s1 - s;
+    n++;
+  }
+  lua_pushinteger(L, n);
+  return 1;
+}
+
+
+/*
+** codepoint(s, [i, [j]])  -> returns codepoints for all characters
+** that start in the range [i,j]
+*/
+static int codepoint (lua_State *L) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer posi = u_posrelat(luaL_optinteger(L, 2, 1), len);
+  lua_Integer pose = u_posrelat(luaL_optinteger(L, 3, posi), len);
+  int n;
+  const char *se;
+  luaL_argcheck(L, posi >= 1, 2, "out of range");
+  luaL_argcheck(L, pose <= (lua_Integer)len, 3, "out of range");
+  if (posi > pose) return 0;  /* empty interval; return no values */
+  n = (int)(pose -  posi + 1);
+  if (posi + n <= pose)  /* (lua_Integer -> int) overflow? */
+    return luaL_error(L, "string slice too long");
+  luaL_checkstack(L, n, "string slice too long");
+  n = 0;
+  se = s + pose;
+  for (s += posi - 1; s < se;) {
+    int code;
+    s = utf8_decode(s, &code);
+    if (s == NULL)
+      return luaL_error(L, "invalid UTF-8 code");
+    lua_pushinteger(L, code);
+    n++;
+  }
+  return n;
+}
+
+
+static void pushutfchar (lua_State *L, int arg) {
+  lua_Integer code = luaL_checkinteger(L, arg);
+  luaL_argcheck(L, 0 <= code && code <= MAXUNICODE, arg, "value out of range");
+  lua_pushfstring(L, "%U", (long)code);
+}
+
+
+/*
+** utfchar(n1, n2, ...)  -> char(n1)..char(n2)...
+*/
+static int utfchar (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  if (n == 1)  /* optimize common case of single char */
+    pushutfchar(L, 1);
+  else {
+    int i;
+    luaL_Buffer b;
+    luaL_buffinit(L, &b);
+    for (i = 1; i <= n; i++) {
+      pushutfchar(L, i);
+      luaL_addvalue(&b);
+    }
+    luaL_pushresult(&b);
+  }
+  return 1;
+}
+
+
+/*
+** offset(s, n, [i])  -> index where n-th character counting from
+**   position 'i' starts; 0 means character at 'i'.
+*/
+static int byteoffset (lua_State *L) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer n  = luaL_checkinteger(L, 2);
+  lua_Integer posi = (n >= 0) ? 1 : len + 1;
+  posi = u_posrelat(luaL_optinteger(L, 3, posi), len);
+  luaL_argcheck(L, 1 <= posi && --posi <= (lua_Integer)len, 3,
+                   "position out of range");
+  if (n == 0) {
+    /* find beginning of current byte sequence */
+    while (posi > 0 && iscont(s + posi)) posi--;
+  }
+  else {
+    if (iscont(s + posi))
+      luaL_error(L, "initial position is a continuation byte");
+    if (n < 0) {
+       while (n < 0 && posi > 0) {  /* move back */
+         do {  /* find beginning of previous character */
+           posi--;
+         } while (posi > 0 && iscont(s + posi));
+         n++;
+       }
+     }
+     else {
+       n--;  /* do not move for 1st character */
+       while (n > 0 && posi < (lua_Integer)len) {
+         do {  /* find beginning of next character */
+           posi++;
+         } while (iscont(s + posi));  /* (cannot pass final '\0') */
+         n--;
+       }
+     }
+  }
+  if (n == 0)  /* did it find given character? */
+    lua_pushinteger(L, posi + 1);
+  else  /* no such character */
+    lua_pushnil(L);
+  return 1;  
+}
+
+
+static int iter_aux (lua_State *L) {
+  size_t len;
+  const char *s = luaL_checklstring(L, 1, &len);
+  lua_Integer n = lua_tointeger(L, 2) - 1;
+  if (n < 0)  /* first iteration? */
+    n = 0;  /* start from here */
+  else if (n < (lua_Integer)len) {
+    n++;  /* skip current byte */
+    while (iscont(s + n)) n++;  /* and its continuations */
+  }
+  if (n >= (lua_Integer)len)
+    return 0;  /* no more codepoints */
+  else {
+    int code;
+    const char *next = utf8_decode(s + n, &code);
+    if (next == NULL || iscont(next))
+      return luaL_error(L, "invalid UTF-8 code");
+    lua_pushinteger(L, n + 1);
+    lua_pushinteger(L, code);
+    return 2;
+  }
+}
+
+
+static int iter_codes (lua_State *L) {
+  luaL_checkstring(L, 1);
+  lua_pushcfunction(L, iter_aux);
+  lua_pushvalue(L, 1);
+  lua_pushinteger(L, 0);
+  return 3;
+}
+
+
+/* pattern to match a single UTF-8 character */
+#define UTF8PATT	"[\0-\x7F\xC2-\xF4][\x80-\xBF]*"
+
+
+static struct luaL_Reg funcs[] = {
+  {"offset", byteoffset},
+  {"codepoint", codepoint},
+  {"char", utfchar},
+  {"len", utflen},
+  {"codes", iter_codes},
+  /* placeholders */
+  {"charpattern", NULL},
+  {NULL, NULL}
+};
+
+
+LUAMOD_API int luaopen_utf8 (lua_State *L) {
+  luaL_newlib(L, funcs);
+  lua_pushliteral(L, UTF8PATT);
+  lua_setfield(L, -2, "charpattern");
+  return 1;
+}
+

lvm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 2.17 2011/05/31 18:27:56 roberto Exp roberto $
+** $Id: lvm.h,v 2.33 2014/07/30 14:42:44 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -13,23 +13,36 @@
 #include "ltm.h"
 
 
-#define tostring(L,o) (ttisstring(o) || (luaV_tostring(L, o)))
+#if !defined(LUA_NOCVTN2S)
-
+#define cvt2str(o)	ttisnumber(o)
-#define tonumber(o,n)	(ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL))
+#else
-
+#define cvt2str(o)	0	/* no conversion from numbers to strings */
-#define equalobj(L,o1,o2)  (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2))
+#endif
-
-#define luaV_rawequalobj(o1,o2)		equalobj(NULL,o1,o2)
 
 
-/* not to called directly */
+#if !defined(LUA_NOCVTS2N)
-LUAI_FUNC int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2);
+#define cvt2num(o)	ttisstring(o)
+#else
+#define cvt2num(o)	0	/* no conversion from strings to numbers */
+#endif
 
 
+#define tonumber(o,n) \
+	(ttisfloat(o) ? (*(n) = fltvalue(o), 1) : luaV_tonumber_(o,n))
+
+#define tointeger(o,i) \
+	(ttisinteger(o) ? (*(i) = ivalue(o), 1) : luaV_tointeger_(o,i))
+
+#define intop(op,v1,v2) l_castU2S(l_castS2U(v1) op l_castS2U(v2))
+
+#define luaV_rawequalobj(t1,t2)		luaV_equalobj(NULL,t1,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);
-LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n);
+LUAI_FUNC int luaV_tonumber_ (const TValue *obj, lua_Number *n);
-LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj);
+LUAI_FUNC int luaV_tointeger_ (const TValue *obj, lua_Integer *p);
 LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key,
                                             StkId val);
 LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
@@ -37,8 +50,9 @@ LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
 LUAI_FUNC void luaV_finishOp (lua_State *L);
 LUAI_FUNC void luaV_execute (lua_State *L);
 LUAI_FUNC void luaV_concat (lua_State *L, int total);
-LUAI_FUNC void luaV_arith (lua_State *L, StkId ra, const TValue *rb,
+LUAI_FUNC lua_Integer luaV_div (lua_State *L, lua_Integer x, lua_Integer y);
-                           const TValue *rc, TMS op);
+LUAI_FUNC lua_Integer luaV_mod (lua_State *L, lua_Integer x, lua_Integer y);
+LUAI_FUNC lua_Integer luaV_shiftl (lua_Integer x, lua_Integer y);
 LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
 
 #endif

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.25 2011/07/15 12:35:32 roberto Exp roberto $
+** $Id: lzio.h,v 1.27 2013/06/07 14:51:10 roberto Exp roberto $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -32,6 +32,7 @@ typedef struct Mbuffer {
 #define luaZ_sizebuffer(buff)	((buff)->buffsize)
 #define luaZ_bufflen(buff)	((buff)->n)
 
+#define luaZ_buffremove(buff,i)	((buff)->n -= (i))
 #define luaZ_resetbuffer(buff) ((buff)->n = 0)
 
 
@@ -45,7 +46,7 @@ typedef struct Mbuffer {
 LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
 LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
                                         void *data);
-LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n);	/* read next n bytes */
+LUAI_FUNC size_t luaZ_read (ZIO* z, void *b, size_t n);	/* read next n bytes */
 
 
 
@@ -55,7 +56,7 @@ struct Zio {
   size_t n;			/* bytes still unread */
   const char *p;		/* current position in buffer */
   lua_Reader reader;		/* reader function */
-  void* data;			/* additional data */
+  void *data;			/* additional data */
   lua_State *L;			/* Lua state (for reader) */
 };
 

makefile

@@ -4,11 +4,12 @@
 
 # == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
-CWARNSC=-pedantic -Wextra \
+# Warnings valid for both C and C++
+CWARNSCPP=-pedantic -Wno-long-long \
+	-Wall -Wextra \
 	-Waggregate-return \
 	-Wcast-align \
         -Wdisabled-optimization \
-	-Wpointer-arith \
 	-Wshadow \
         -Wsign-compare \
 	-Wundef \
@@ -24,15 +25,17 @@ CWARNSC=-pedantic -Wextra \
 	# -Wformat=2 \
 	# -Wcast-qual \
 
-# The next warnings are not valid for C++
+# The next warnings are neither valid nor needed for C++
-CWARNS= $(CWARNSC) \
+CWARNSC= -Wdeclaration-after-statement \
-        -Wdeclaration-after-statement \
         -Wmissing-prototypes \
         -Wnested-externs \
 	-Wstrict-prototypes \
 	-Wc++-compat \
+	-Wold-style-declaration \
 	-Wold-style-definition \
 
+CWARNS= $(CWARNSCPP) $(CWARNSC)
+
 
 # -DEXTERNMEMCHECK -DHARDSTACKTESTS -DHARDMEMTESTS  -DTRACEMEM='"tempmem"'
 # -g -DLUA_USER_H='"ltests.h"'
@@ -40,13 +43,13 @@ CWARNS= $(CWARNSC) \
 # -DLUA_USE_CTYPE  -DLUA_USE_APICHECK
 TESTS= -DLUA_USER_H='"ltests.h"'
 
-# -mtune=native -fomit-frame-pointer 
+# -mtune=native -fomit-frame-pointer
 LOCAL = $(TESTS) $(CWARNS) -g
 
 
 
 # enable Linux goodies
-MYCFLAGS= $(LOCAL) -DLUA_USE_LINUX -DLUA_COMPAT_ALL
+MYCFLAGS= $(LOCAL) -DLUA_USE_LINUX -DLUA_COMPAT_5_2
 MYLDFLAGS= $(LOCAL) -Wl,-E
 MYLIBS= -ldl -lreadline -lhistory -lncurses
 
@@ -72,7 +75,7 @@ CORE_O=	lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o \
 	ltm.o lundump.o lvm.o lzio.o ltests.o
 AUX_O=	lauxlib.o
 LIB_O=	lbaselib.o ldblib.o liolib.o lmathlib.o loslib.o ltablib.o lstrlib.o \
-	lbitlib.o loadlib.o lcorolib.o linit.o
+	lutf8lib.o lbitlib.o loadlib.o lcorolib.o linit.o
 
 LUA_T=	lua
 LUA_O=	lua.o
@@ -120,8 +123,8 @@ echo:
 
 $(ALL_O): makefile
 
-# DO NOT DELETE
+# DO NOT EDIT
-# automatically made with 'gcc -MM'
+# automatically made with 'gcc -MM l*.c'
 
 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 \
@@ -131,7 +134,7 @@ lbaselib.o: lbaselib.c lua.h luaconf.h lauxlib.h lualib.h
 lbitlib.o: lbitlib.c lua.h luaconf.h lauxlib.h lualib.h
 lcode.o: lcode.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
  lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h ldo.h lgc.h \
- lstring.h ltable.h
+ lstring.h ltable.h lvm.h
 lcorolib.o: lcorolib.c lua.h luaconf.h lauxlib.h lualib.h
 lctype.o: lctype.c lctype.h lua.h luaconf.h llimits.h
 ldblib.o: ldblib.c lua.h luaconf.h lauxlib.h lualib.h
@@ -150,7 +153,7 @@ lgc.o: lgc.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
 linit.o: linit.c lua.h luaconf.h lualib.h lauxlib.h
 liolib.o: liolib.c lua.h luaconf.h lauxlib.h lualib.h
 llex.o: llex.c lua.h luaconf.h lctype.h llimits.h ldo.h lobject.h \
- lstate.h ltm.h lzio.h lmem.h llex.h lparser.h lstring.h lgc.h ltable.h
+ lstate.h ltm.h lzio.h lmem.h lgc.h llex.h lparser.h lstring.h ltable.h
 lmathlib.o: lmathlib.c lua.h luaconf.h lauxlib.h lualib.h
 lmem.o: lmem.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
  ltm.h lzio.h lmem.h ldo.h lgc.h
@@ -165,20 +168,21 @@ lparser.o: lparser.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
 lstate.o: lstate.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 llex.h lstring.h \
  ltable.h
-lstring.o: lstring.c lua.h luaconf.h lmem.h llimits.h lobject.h lstate.h \
+lstring.o: lstring.c lua.h luaconf.h ldebug.h lstate.h lobject.h \
- ltm.h lzio.h lstring.h lgc.h
+ llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h
 lstrlib.o: lstrlib.c lua.h luaconf.h lauxlib.h lualib.h
 ltable.o: ltable.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
- ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h
+ ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h
 ltablib.o: ltablib.c lua.h luaconf.h lauxlib.h lualib.h
 ltests.o: ltests.c lua.h luaconf.h lapi.h llimits.h lstate.h lobject.h \
  ltm.h lzio.h lmem.h lauxlib.h lcode.h llex.h lopcodes.h lparser.h \
  lctype.h ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h lualib.h
-ltm.o: ltm.c lua.h luaconf.h lobject.h llimits.h lstate.h ltm.h lzio.h \
+ltm.o: ltm.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
- lmem.h lstring.h lgc.h ltable.h
+ lzio.h lmem.h ldo.h lstring.h lgc.h ltable.h lvm.h
 lua.o: lua.c lua.h luaconf.h lauxlib.h lualib.h
 lundump.o: lundump.c lua.h luaconf.h ldebug.h lstate.h lobject.h \
  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lstring.h lgc.h lundump.h
+lutf8lib.o: lutf8lib.c lua.h luaconf.h lauxlib.h lualib.h
 lvm.o: lvm.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
  lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h ltable.h lvm.h
 lzio.o: lzio.c lua.h luaconf.h llimits.h lmem.h lstate.h lobject.h ltm.h \