explicit macro to control use of _longjmp

(like other luaL_check functions)

bugs

@@ -0,0 +1,766 @@
+--[[
+** lua.stx / llex.c
+Tue Dec  2 10:45:48 EDT 1997
+>> BUG: "lastline" was not reset on function entry, so debug information
+>> started only in the 2nd line of a function.
+
+
+
+=================================================================
+--- Version 3.1 alpha
+
+** lua.c
+Thu Jan 15 14:34:58 EDT 1998
+>> must include "stdlib.h" (for "exit()").
+
+** lbuiltin.c / lobject.h
+Thu Jan 15 14:34:58 EDT 1998
+>> MAX_WORD may be bigger than MAX_INT
+(by lhf)
+
+** llex.c
+Mon Jan 19 18:17:18 EDT 1998
+>> wrong line number (+1) in error report when file starts with "#..."
+
+** lstrlib.c
+Tue Jan 27 15:27:49 EDT 1998
+>> formats like "%020d" were considered too big (3 digits); moreover,
+>> some sistems limit printf to at most 500 chars, so we can limit sizes
+>> to 2 digits (99).
+
+** lapi.c
+Tue Jan 27 17:12:36 EDT 1998
+>> "lua_getstring" may create a new string, so should check GC
+
+** lstring.c / ltable.c
+Wed Jan 28 14:48:12 EDT 1998
+>> tables can become full of "empty" slots, and keep growing without limits.
+
+** lstrlib.c
+Mon Mar  9 15:26:09 EST 1998
+>> gsub('a', '(b?)%1*' ...) loops (because the capture is empty).
+
+** lstrlib.c
+Mon May 18 19:20:00 EST 1998
+>> arguments for "format" 'x', 'X', 'o' and 'u' must be unsigned int.
+
+
+
+=================================================================
+--- Version 3.1
+
+** liolib.c / lauxlib.c
+Mon Sep  7 15:57:02 EST 1998
+>> function "luaL_argerror" prints wrong argument number (from a user's point
+of view) when functions have upvalues.
+
+** lstrlib.c
+Tue Nov 10 17:29:36 EDT 1998
+>> gsub/strfind do not check whether captures are properly finished.
+(by roberto/tomas)
+
+** lbuiltin.c
+Fri Dec 18 11:22:55 EDT 1998
+>> "tonumber" goes crazy with negative numbers in other bases (not 10),
+because "strtol" returns long, not unsigned long.
+(by Visual C++)
+
+** lstrlib.c
+Mon Jan  4 10:41:40 EDT 1999
+>> "format" does not check size of format item (such as "%00000...00000d").
+
+** lapi.c
+Wed Feb  3 14:40:21 EDT 1999
+>> getlocal cannot return the local itself, since lua_isstring and
+lua_isnumber can modify it.
+
+** lstrlib.c
+Thu Feb  4 17:08:50 EDT 1999
+>> format "%s" may break limit of "sprintf" on some machines.
+(by Marcelo Sales)
+
+** lzio.c
+Thu Mar  4 11:49:37 EST 1999
+>> file stream cannot call fread after EOF.
+(by lhf)
+
+
+
+=================================================================
+--- Version 3.2 (beta)
+
+** lstrlib.c
+Fri Apr 30 11:10:20 EST 1999
+>> '$' at end of pattern was matching regular '$', too.
+(by anna; since 2.5)
+
+** lbuiltin.c
+Fri May 21 17:15:11 EST 1999
+>> foreach, foreachi, foreachvar points to function in stack when stack
+can be reallocated.
+(by tomas; since 3.2 beta)
+
+** lparser.c
+Wed Jun 16 10:32:46 EST 1999
+>> cannot assign to unlimited variables, because it causes overflow in
+the number of returns of a function.
+(since 3.1)
+
+
+
+=================================================================
+--- Version 3.2
+
+** lmathlib.c
+Wed Aug 18 11:28:38 EST 1999
+>> random(0) and random(x,0) are wrong (0 is read as no argument!).
+(by Dave Bollinger; since 3.1)
+
+** lparser.c
+Thu Sep  2 10:07:20 EST 1999
+>> in the (old) expression << ls->fs->f->consts[checkname(ls)] >>, checkname
+could realloc f->consts.
+(by Supratik Champati; since 3.2 beta)
+
+** lobject.c / lbuiltin.c
+Wed Sep  8 17:41:54 EST 1999
+>> tonumber'e1' and tonumber('  ', x), for x!=10, gave 0 instead of nil.
+(since 3.1)
+
+** lstrlib.c
+Thu Nov 11 14:36:30 EDT 1999
+>> `strfind' does not handle \0 in plain search.
+(by Jon Kleiser; since 3.1)
+
+** lparser.c
+Wed Dec 29 16:05:43 EDT 1999
+>> return gives wrong line in debug information
+(by lhf; since 3.2 [at least])
+
+** ldo.c
+Thu Dec 30 16:39:33 EDT 1999
+>> cannot reopen stdin (for binary mode)
+(by lhf & roberto; since 3.1)
+
+** lapi.c
+Thu Mar  2 09:41:53 EST 2000
+>> lua_settable should check stack space (it could call a T.M.)
+(by lhf & celes; since 3.2; it was already fixed by fixed stack)
+
+** lparser.c
+Mon Apr  3 09:59:06 EST 2000
+>> '%' should be in expfollow
+(by Edgar Toernig; since 3.1; it was already fixed)
+
+** lbuiltin.c
+Mon Apr  3 10:05:05 EST 2000
+>> tostring() without arguments gives seg. fault.
+(by Edgar Toernig; since 3.0)
+
+
+
+=================================================================
+--- Version 4.0 alpha
+
+Tested with full test suites (as locked in Mon Apr 24 14:23:11 EST 2000)
+in the following platforms:
+* Linux   - gcc, g++
+* AIX     - gcc
+* Solaris - gcc, cc
+* IRIX	  - cc, cc-purify
+* Windows - Visual C++ (.c e .cpp, warning level=4)
+
+
+** lstrlib.c
+Tue May  2 15:27:58 EST 2000
+>> `strfind' gets wrong subject length when there is an offset
+(by Jon Kleiser; since 4.0a)
+
+** 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','')}»)
+(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»)
+(by Edgar Toernig; since 3.1)
+
+** lparser.c
+Tue Aug 29 15:56:05 EST 2000
+>> error message for `for' uses `while'
+(since 4.0a; already corrected)
+
+** lgc.c
+Tue Aug 29 15:57:41 EST 2000
+>> gc tag method for nil could call line hook
+(by ry; since ?)
+
+
+
+=================================================================
+--- Version 4.0 Beta
+
+** liolib.c
+Fri Sep 22 15:12:37 EST 2000
+>> `read("*w")' should return nil at EOF
+(by roberto; since 4.0b)
+
+** lvm.c
+Mon Sep 25 11:47:48 EST 2000
+>> lua_gettable does not get key from stack top
+(by Philip Yi; since 4.0b)
+
+** lgc.c
+Mon Sep 25 11:50:48 EST 2000
+>> GC may crash when checking locked C closures
+(by Philip Yi; since 4.0b)
+
+** lapi.c
+Wed Sep 27 09:50:19 EST 2000
+>> lua_tag should return LUA_NOTAG for non-valid indices
+(by Paul Hankin; since 4.0b)
+
+** 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'}»)
+(by Edgar Toernig; since 4.0b, deriving from previous bug)
+
+** liolib.c
+Thu Oct 26 10:50:46 EDT 2000
+>> in function `read_file', realloc() doesn't free the buffer if it can't
+>> allocate new memory
+(by Mauro Vezzosi; since 4.0b)
+
+
+
+=================================================================
+--- Version 4.0
+
+** lparser.c
+Wed Nov 29 09:51:44 EDT 2000
+>> parser does not accept a `;' after a `return'
+(by lhf; since 4.0b)
+
+** liolib.c
+Fri Dec 22 15:30:42 EDT 2000
+>> when `read' fails it must return nil (and not no value)
+(by cassino; since at least 3.1)
+
+** lstring.c/lapi.c
+Thu Feb  1 11:55:45 EDT 2001
+>> lua_pushuserdata(L, NULL) is buggy
+(by Edgar Toernig; since 4.0)
+
+** ldo.c
+Fri Feb  2 14:06:40 EDT 2001
+>> «while 1 dostring[[print('hello\n')]] end» never reclaims memory
+(by Andrew Paton; since 4.0b)
+
+** lbaselib.c
+Tue Feb  6 11:57:13 EDT 2001
+>> ESC (which starts precompiled code) in C is \33, not \27
+(by Edgar Toernig and lhf; since 4.0b)
+
+** lparser.c
+Tue Jul 10 16:59:18 EST 2001
+>> error message for `%a' gave wrong line number
+(by Leonardo Constantino; since 4.0)
+
+** lbaselib.c
+Fri Dec 21 15:21:05 EDT 2001
+>> seg. fault when rawget/rawset get extra arguments
+(by Eric Mauger; since 4.0b)
+
+** lvm.c
+Wed Jun 19 13:28:20 EST 2002
+>> line hook gets wrong `ar'
+(by Daniel C. Sinclair; since 4.0.b)
+
+** ldo.c
+Wed Jun 19 13:31:49 EST 2002
+>> `protectedparser' may run GC, and then collect `filename'
+>> (in function `parse_file')
+(by Alex Bilyk; since 4.0)
+
+
+
+
+=================================================================
+--- Version 5.0 alpha
+
+** lgc.c
+Fri Aug 30 13:49:14 EST 2002
+>> GC metamethod stored in a weak metatable being collected together with
+>> userdata may not be cleared properly
+(by Roberto; since 5.0a)
+
+** lapi.c
+Thu Nov 21 11:00:00 EST 2002
+>> ULONG_MAX>>10 may not fit into an int
+(by Jeff Petkau; since 4.0)
+
+** lparser.c
+Fri Dec  6 17:06:40 UTC 2002
+>> scope of generic for variables is not sound
+(by Gavin Wraith; since 5.0a)
+
+
+
+
+=================================================================
+--- Version 5.0 beta
+** lbaselib.c
+Fri Dec 20 09:53:19 UTC 2002
+>> `resume' was checking the wrong value for stack overflow
+(by Maik Zimmermann; since 5.0b)
+
+** ldo.c
+Thu Jan 23 11:29:06 UTC 2003
+>> error during garbage collection in luaD_protectedparser is not being
+>> protected
+(by Benoit Germain; since 5.0a)
+
+** ldo.c (and others)
+Fri Feb 28 14:20:33 EST 2003
+>> GC metamethod calls could mess C/Lua stack syncronization
+(by Roberto; since 5.0b)
+
+** lzio.h/zlio.c
+Thu Mar 20 11:40:12 EST 2003
+>> zio mixes a 255 as first char in a buffer with EOZ
+(by lhf; since 5.0a)
+
+
+
+--]]
+-----------------------------------------------------------------
+-- Lua 5.0 (final)
+
+Bug{
+what = [[lua_closethread exists only in the manual]],
+report = [[by Nguyen Binh, 28/04/2003]],
+patch = [[no patch; the manual is wrong]],
+}
+
+
+Bug{
+what = [[attempt to resume a running coroutine crashes Lua]],
+example = [[
+function co_func (current_co)
+   coroutine.resume(co)
+end
+co = coroutine.create(co_func)
+coroutine.resume(co)
+coroutine.resume(co)     --> seg. fault
+]],
+report = [[by Alex Bilyk, 09/05/2003]], 
+patch = [[
+* ldo.c:
+325,326c325
+<     if (nargs >= L->top - L->base)
+<       luaG_runerror(L, "cannot resume dead coroutine");
+---
+>     lua_assert(nargs < L->top - L->base);
+329c328,329
+<   else if (ci->state & CI_YIELD) {  /* inside a yield? */
+---
+>   else {  /* inside a yield */
+>     lua_assert(ci->state & CI_YIELD);
+344,345d343
+<   else
+<     luaG_runerror(L, "cannot resume non-suspended coroutine");
+351a350,358
+> static int resume_error (lua_State *L, const char *msg) {
+>   L->top = L->ci->base;
+>   setsvalue2s(L->top, luaS_new(L, msg));
+>   incr_top(L);
+>   lua_unlock(L);
+>   return LUA_ERRRUN;
+> }
+> 
+> 
+355a363,368
+>   if (L->ci == L->base_ci) {
+>     if (nargs >= L->top - L->base)
+>       return resume_error(L, "cannot resume dead coroutine");
+>   }
+>   else if (!(L->ci->state & CI_YIELD))  /* not inside a yield? */
+>     return resume_error(L, "cannot resume non-suspended coroutine");
+]],
+}
+
+
+Bug{
+what = [[file:close cannot be called without a file. (results in seg fault)]],
+example = [[
+> io.stdin.close()    -- correct call shold be io.stdin:close()
+]],
+report = [[by Tuomo Valkonen, 27/05/2003]], 
+patch = [[
+* liolib.c:
+161c161
+<   if (lua_isnone(L, 1)) {
+---
+>   if (lua_isnone(L, 1) && lua_type(L, lua_upvalueindex(1)) == LUA_TTABLE) {
+]],   --}}
+}
+
+
+Bug{
+what = [[C functions also may have stacks larger than current top]],
+example = [[
+Must recompile lua with a change in lua.c and with lua_assert defined:
+* lua.c:
+381a382
+>   lua_checkstack(l, 1000);
+]],
+report = [[Alex Bilyk, 09/06/2003]],
+patch = [[
+* lgc.c:
+247c247
+<     if (!(ci->state & CI_C) && lim < ci->top)
+---
+>     if (lim < ci->top)
+]],
+}
+
+
+Bug{
+what = [[`pc' address is invalidated when a coroutine is suspended]],
+example = [[
+function g(x)
+    coroutine.yield(x)
+end
+
+function f (i)
+  debug.sethook(print, "l")
+  for j=1,1000 do
+    g(i+j)
+  end
+end
+
+co = coroutine.wrap(f)
+co(10)
+pcall(co)
+pcall(co)
+]],
+report = [[Nick Trout, 07/07/2003]],
+patch = [[
+* lvm.c:
+402,403c402,403
+<   L->ci->u.l.pc = &pc;
+<   if (L->hookmask & LUA_MASKCALL)
+---
+>   if (L->hookmask & LUA_MASKCALL) {
+>     L->ci->u.l.pc = &pc;
+404a405
+>   }
+405a407
+>   L->ci->u.l.pc = &pc;
+676,678c678
+<           lua_assert(ci->u.l.pc == &pc &&
+<                      ttisfunction(ci->base - 1) &&
+<                      (ci->state & CI_SAVEDPC));
+---
+>           lua_assert(ttisfunction(ci->base - 1) && (ci->state & CI_SAVEDPC));
+]]
+}
+
+
+Bug{
+what = [[userdata to be collected still counts into new GC threshold,
+increasing memory consumption]],
+report = [[Roberto, 25/07/2003]],
+example = [[
+a = newproxy(true)
+getmetatable(a).__gc = function () end
+for i=1,10000000 do
+  newproxy(a)
+  if math.mod(i, 10000) == 0 then print(gcinfo()) end
+end
+]],
+patch = [[
+* lgc.h:
+18c18
+< void luaC_separateudata (lua_State *L);
+---
+> size_t luaC_separateudata (lua_State *L);
+
+* lgc.c:
+113c113,114
+< void luaC_separateudata (lua_State *L) {
+---
+> size_t luaC_separateudata (lua_State *L) {
+>   size_t deadmem = 0;
+127a129
+>       deadmem += sizeudata(gcotou(curr)->uv.len);
+136a139
+>   return deadmem;
+390c393
+< static void checkSizes (lua_State *L) {
+---
+> static void checkSizes (lua_State *L, size_t deadmem) {
+400c403
+<   G(L)->GCthreshold = 2*G(L)->nblocks;  /* new threshold */
+---
+>   G(L)->GCthreshold = 2*G(L)->nblocks - deadmem;  /* new threshold */
+454c457,458
+< static void mark (lua_State *L) {
+---
+> static size_t mark (lua_State *L) {
+>   size_t deadmem;
+467c471
+<   luaC_separateudata(L);  /* separate userdata to be preserved */
+---
+>   deadmem = luaC_separateudata(L);  /* separate userdata to be preserved */
+475a480
+>   return deadmem;
+480c485
+<   mark(L);
+---
+>   size_t deadmem = mark(L);
+482c487
+<   checkSizes(L);
+---
+>   checkSizes(L, deadmem);
+]]
+}
+
+Bug{
+what=[[IBM AS400 (OS400) has sizeof(void *)==16, and a `%p' may generate
+up to 60 characters in a `printf'. That causes a buffer overflow in
+`tostring'.]],
+
+report = [[David Burgess, 25/08/2003]],
+
+example = [[print{}; (in an AS400 machine)]],
+
+patch = [[
+* liolib.c:
+178c178
+<   char buff[32];
+---
+>   char buff[128];
+
+* lbaselib.c:
+327c327
+<   char buff[64];
+---
+>   char buff[128];
+]]
+}
+
+
+Bug{
+what = [[syntax `local function' does not increment stack size]],
+
+report = [[Rici Lake, 26/09/2003]],
+
+example = [[
+-- must run this with precompiled code
+local a,b,c
+local function d () end
+]],
+
+patch = [[
+* lparser.c:
+1143a1144
+>   FuncState *fs = ls->fs;
+1145c1146,1147
+<   init_exp(&v, VLOCAL, ls->fs->freereg++);
+---
+>   init_exp(&v, VLOCAL, fs->freereg);
+>   luaK_reserveregs(fs, 1);
+1148c1150,1152
+<   luaK_storevar(ls->fs, &v, &b);
+---
+>   luaK_storevar(fs, &v, &b);
+>   /* debug information will only see the variable after this point! */
+>   getlocvar(fs, fs->nactvar - 1).startpc = fs->pc;
+]],
+
+}
+
+
+Bug{
+
+what = [[count hook may be called without being set]],
+
+report = [[Andreas Stenius, 06/10/2003]],
+
+example = [[
+set your hooks with
+
+  lua_sethook(L, my_hook, LUA_MASKLINE | LUA_MASKRET, 1);
+
+(It is weird to use a count > 0 without setting the count hook,
+but it is not wrong.)
+]],
+
+patch = [[
+* lvm.c:
+69c69
+<   if (mask > LUA_MASKLINE) {  /* instruction-hook set? */
+---
+>   if (mask & LUA_MASKCOUNT) {  /* instruction-hook set? */
+]],
+
+}
+
+
+Bug{
+
+what = [[`dofile' eats one return value when called without arguments]],
+
+report = [[Frederico Abraham, 15/01/2004]],
+
+example = [[
+a,b = dofile()   --< here you enter `return 1,2,3 <eof>'
+print(a,b)   --> 2   3   (should be 1 and 2)
+]],
+
+patch = [[
+* lbaselib.c:
+313a314
+>   int n = lua_gettop(L);
+317c318
+<   return lua_gettop(L) - 1;
+---
+>   return lua_gettop(L) - n;
+]],
+
+}
+
+
+
+-----------------------------------------------------------------
+-- Lua 5.0.2
+
+Bug{
+what = [[string concatenation may cause arithmetic overflow, leading
+to a buffer overflow]],
+
+report = [[Rici Lake, 20/05/2004]],
+
+example = [[
+longs = string.rep("\0", 2^25)
+function catter(i)
+    return assert(loadstring(
+      string.format("return function(a) return a%s end",
+                     string.rep("..a", i-1))))()
+end
+rep129 = catter(129)
+rep129(longs)
+]],
+
+patch = [[
+* lvm.c:
+@@ -321,15 +321,15 @@
+         luaG_concaterror(L, top-2, top-1);
+     } else if (tsvalue(top-1)->tsv.len > 0) {  /* if len=0, do nothing */
+       /* at least two string values; get as many as possible */
+-      lu_mem tl = cast(lu_mem, tsvalue(top-1)->tsv.len) +
+-                  cast(lu_mem, tsvalue(top-2)->tsv.len);
++      size_t tl = tsvalue(top-1)->tsv.len;
+       char *buffer;
+       int i;
+-      while (n < total && tostring(L, top-n-1)) {  /* collect total length */
+-        tl += tsvalue(top-n-1)->tsv.len;
+-        n++;
++      /* collect total length */
++      for (n = 1; n < total && tostring(L, top-n-1); n++) {
++        size_t l = tsvalue(top-n-1)->tsv.len;
++        if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
++        tl += l;
+       }
+-      if (tl > MAX_SIZET) luaG_runerror(L, "string size overflow");
+       buffer = luaZ_openspace(L, &G(L)->buff, tl);
+       tl = 0;
+       for (i=n; i>0; i--) {  /* concat all strings */
+]]
+}
+
+
+Bug{
+what = [[lua_getupvalue and setupvalue do not check for index too small]],
+
+report = [[Mike Pall, ?/2004]],
+
+example = [[debug.getupvalue(function() end, 0)]],
+
+patch = [[
+* lapi.c
+941c941
+<     if (n > f->c.nupvalues) return NULL;
+---
+>     if (!(1 <= n && n <= f->c.nupvalues)) return NULL;
+947c947
+<     if (n > p->sizeupvalues) return NULL;
+---
+>     if (!(1 <= n && n <= p->sizeupvalues)) return NULL;
+]]
+}
+
+
+Bug{
+what = [[values holded in open upvalues of suspended threads may be
+incorrectly collected]],
+
+report = [[Spencer Schumann, 31/12/2004]],
+
+example = [[
+local thread_id = 0
+local threads = {}
+
+function fn(thread)
+    thread_id = thread_id + 1
+    threads[thread_id] = function()
+                             thread = nil
+                         end
+    coroutine.yield()
+end
+
+while true do
+    local thread = coroutine.create(fn)
+    coroutine.resume(thread, thread)
+end
+]],
+
+patch = [[
+* lgc.c:
+221,224c221,222
+<       if (!u->marked) {
+<         markobject(st, &u->value);
+<         u->marked = 1;
+<       }
+---
+>       markobject(st, u->v);
+>       u->marked = 1;
+]],
+}
+
+
+Bug{
+what = [[rawset/rawget do not ignore extra arguments]],
+
+report = [[Romulo Bahiense, 11/03/2005]],
+
+example = [[
+a = {}
+rawset(a, 1, 2, 3)
+print(a[1], a[2])    -- should be 2 and nil
+]],
+
+patch = [[
+* lbaselib.c:
+175a176
+>   lua_settop(L, 2);
+183a185
+>   lua_settop(L, 3);
+]],
+}
+

exscript

@@ -1,3 +0,0 @@
-1d
-x
-

hash.c

@@ -1,345 +0,0 @@
-/*
-** hash.c
-** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
-*/
-
-char *rcs_hash="$Id: hash.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
-
-#include <string.h>
-#include <stdlib.h>
-
-#include "mm.h"
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "lua.h"
-
-#define streq(s1,s2)	(strcmp(s1,s2)==0)
-#define strneq(s1,s2)	(strcmp(s1,s2)!=0)
-
-#define new(s)		((s *)malloc(sizeof(s)))
-#define newvector(n,s)	((s *)calloc(n,sizeof(s)))
-
-#define nhash(t)	((t)->nhash)
-#define nodelist(t)	((t)->list)
-#define list(t,i)	((t)->list[i])
-#define markarray(t)    ((t)->mark)
-#define ref_tag(n)	(tag(&(n)->ref))
-#define ref_nvalue(n)	(nvalue(&(n)->ref))
-#define ref_svalue(n)	(svalue(&(n)->ref))
-
-
-typedef struct ArrayList
-{
- Hash *array;
- struct ArrayList *next;
-} ArrayList;
-
-static ArrayList *listhead = NULL;
-
-static int head (Hash *t, Object *ref)		/* hash function */
-{
- if (tag(ref) == T_NUMBER) return (((int)nvalue(ref))%nhash(t));
- else if (tag(ref) == T_STRING)
- {
-  int h;
-  char *name = svalue(ref);
-  for (h=0; *name!=0; name++)		/* interpret name as binary number */
-  {
-   h <<= 8;
-   h  += (unsigned char) *name;		/* avoid sign extension */
-   h  %= nhash(t);			/* make it a valid index */
-  }
-  return h;
- }
- else
- {
-  lua_reportbug ("unexpected type to index table");
-  return -1;
- }
-}
-
-static Node *present(Hash *t, Object *ref, int h)
-{
- Node *n=NULL, *p;
- if (tag(ref) == T_NUMBER)
- {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_NUMBER && nvalue(ref) == ref_nvalue(n)) break;
- }  
- else if (tag(ref) == T_STRING)
- {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_STRING && streq(svalue(ref),ref_svalue(n))) break;
- }  
- if (n==NULL)				/* name not present */
-  return NULL;
-#if 0
- if (p!=NULL)				/* name present but not first */
- {
-  p->next=n->next;			/* move-to-front self-organization */
-  n->next=list(t,h);
-  list(t,h)=n;
- }
-#endif
- return n;
-}
-
-static void freelist (Node *n)
-{
- while (n)
- {
-  Node *next = n->next;
-  free (n);
-  n = next;
- }
-}
-
-/*
-** Create a new hash. Return the hash pointer or NULL on error.
-*/
-static Hash *hashcreate (unsigned int nhash)
-{
- Hash *t = new (Hash);
- if (t == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- nhash(t) = nhash;
- markarray(t) = 0;
- nodelist(t) = newvector (nhash, Node*);
- if (nodelist(t) == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- return t;
-}
-
-/*
-** Delete a hash
-*/
-static void hashdelete (Hash *h)
-{
- int i;
- for (i=0; i<nhash(h); i++)
-  freelist (list(h,i));
- free (nodelist(h));
- free(h);
-}
-
-
-/*
-** Mark a hash and check its elements 
-*/
-void lua_hashmark (Hash *h)
-{
- if (markarray(h) == 0)
- {
-  int i;
-  markarray(h) = 1;
-  for (i=0; i<nhash(h); i++)
-  {
-   Node *n;
-   for (n = list(h,i); n != NULL; n = n->next)
-   {
-    lua_markobject(&n->ref);
-    lua_markobject(&n->val);
-   }
-  }
- } 
-}
- 
-/*
-** Garbage collection to arrays
-** Delete all unmarked arrays.
-*/
-void lua_hashcollector (void)
-{
- ArrayList *curr = listhead, *prev = NULL;
- while (curr != NULL)
- {
-  ArrayList *next = curr->next;
-  if (markarray(curr->array) != 1)
-  {
-   if (prev == NULL) listhead = next;
-   else              prev->next = next;
-   hashdelete(curr->array);
-   free(curr);
-  }
-  else
-  {
-   markarray(curr->array) = 0;
-   prev = curr;
-  }
-  curr = next;
- }
-}
-
-
-/*
-** Create a new array
-** This function insert the new array at array list. It also
-** execute garbage collection if the number of array created
-** exceed a pre-defined range.
-*/
-Hash *lua_createarray (int nhash)
-{
- ArrayList *new = new(ArrayList);
- if (new == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- new->array = hashcreate(nhash);
- if (new->array == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
-
- if (lua_nentity == lua_block)
-  lua_pack(); 
-
- lua_nentity++;
- new->next = listhead;
- listhead = new;
- return new->array;
-}
-
-
-/*
-** If the hash node is present, return its pointer, otherwise create a new
-** node for the given reference and also return its pointer.
-** On error, return NULL.
-*/
-Object *lua_hashdefine (Hash *t, Object *ref)
-{
- int   h;
- Node *n;
- h = head (t, ref);
- if (h < 0) return NULL; 
- 
- n = present(t, ref, h);
- if (n == NULL)
- {
-  n = new(Node);
-  if (n == NULL)
-  {
-   lua_error ("not enough memory");
-   return NULL;
-  }
-  n->ref = *ref;
-  tag(&n->val) = T_NIL;
-  n->next = list(t,h);			/* link node to head of list */
-  list(t,h) = n;
- }
- return (&n->val);
-}
-
-
-/*
-** Internal function to manipulate arrays. 
-** Given an array object and a reference value, return the next element
-** in the hash.
-** This function pushs the element value and its reference to the stack.
-*/
-static void firstnode (Hash *a, int h)
-{
- if (h < nhash(a))
- {  
-  int i;
-  for (i=h; i<nhash(a); i++)
-  {
-   if (list(a,i) != NULL)
-   {
-    if (tag(&list(a,i)->val) != T_NIL)
-    {
-     lua_pushobject (&list(a,i)->ref);
-     lua_pushobject (&list(a,i)->val);
-     return;
-    }
-    else
-    {
-     Node *next = list(a,i)->next;
-     while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-     if (next != NULL)
-     {
-      lua_pushobject (&next->ref);
-      lua_pushobject (&next->val);
-      return;
-     }
-    }
-   }
-  }
- }
- lua_pushnil();
- lua_pushnil();
-}
-void lua_next (void)
-{
- Hash   *a;
- Object *o = lua_getparam (1);
- Object *r = lua_getparam (2);
- if (o == NULL || r == NULL)
- { lua_error ("too few arguments to function `next'"); return; }
- if (lua_getparam (3) != NULL)
- { lua_error ("too many arguments to function `next'"); return; }
- if (tag(o) != T_ARRAY)
- { lua_error ("first argument of function `next' is not a table"); return; }
- a = avalue(o);
- if (tag(r) == T_NIL)
- {
-  firstnode (a, 0);
-  return;
- }
- else
- {
-  int h = head (a, r);
-  if (h >= 0)
-  {
-   Node *n = list(a,h);
-   while (n)
-   {
-    if (memcmp(&n->ref,r,sizeof(Object)) == 0)
-    {
-     if (n->next == NULL)
-     {
-      firstnode (a, h+1);
-      return;
-     }
-     else if (tag(&n->next->val) != T_NIL)
-     {
-      lua_pushobject (&n->next->ref);
-      lua_pushobject (&n->next->val);
-      return;
-     }
-     else
-     {
-      Node *next = n->next->next;
-      while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-      if (next == NULL)
-      {
-       firstnode (a, h+1);
-       return;
-      }
-      else
-      {
-       lua_pushobject (&next->ref);
-       lua_pushobject (&next->val);
-      }
-      return;
-     }
-    }
-    n = n->next;
-   }
-   if (n == NULL)
-    lua_error ("error in function 'next': reference not found");
-  }
- }
-}
-

hash.h

@@ -1,32 +0,0 @@
-/*
-** hash.h
-** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
-** $Id: hash.h,v 1.1 1993/12/17 18:41:19 celes Exp celes $
-*/
-
-#ifndef hash_h
-#define hash_h
-
-typedef struct node
-{
- Object ref;
- Object val;
- struct node *next;
-} Node;
-
-typedef struct Hash
-{
- char           mark;
- unsigned int   nhash;
- Node         **list;
-} Hash;
-
-
-Hash    *lua_createarray (int nhash);
-void     lua_hashmark (Hash *h);
-void     lua_hashcollector (void);
-Object 	*lua_hashdefine (Hash *t, Object *ref);
-void     lua_next (void);
-
-#endif

inout.c

@@ -1,178 +0,0 @@
-/*
-** inout.c
-** Provide function to realise the input/output function and debugger 
-** facilities.
-*/
-
-char *rcs_inout="$Id: inout.c,v 1.2 1993/12/22 21:15:16 roberto Exp celes $";
-
-#include <stdio.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "tree.h"
-
-/* Exported variables */
-int lua_linenumber;
-int lua_debug;
-int lua_debugline;
-
-/* Internal variables */
-#ifndef MAXFUNCSTACK
-#define MAXFUNCSTACK 32
-#endif
-static struct { int file; int function; } funcstack[MAXFUNCSTACK];
-static int nfuncstack=0;
-
-static FILE *fp;
-static char *st;
-static void (*usererror) (char *s);
-
-/*
-** Function to set user function to handle errors.
-*/
-void lua_errorfunction (void (*fn) (char *s))
-{
- usererror = fn;
-}
-
-/*
-** Function to get the next character from the input file
-*/
-static int fileinput (void)
-{
- int c = fgetc (fp);
- return (c == EOF ? 0 : c);
-}
-
-/*
-** Function to get the next character from the input string
-*/
-static int stringinput (void)
-{
- st++;
- return (*(st-1));
-}
-
-/*
-** Function to open a file to be input unit. 
-** Return 0 on success or 1 on error.
-*/
-int lua_openfile (char *fn)
-{
- lua_linenumber = 1;
- lua_setinput (fileinput);
- fp = fopen (fn, "r");
- if (fp == NULL) return 1;
- if (lua_addfile (fn)) return 1;
- return 0;
-}
-
-/*
-** Function to close an opened file
-*/
-void lua_closefile (void)
-{
- if (fp != NULL)
- {
-  lua_delfile();
-  fclose (fp);
-  fp = NULL;
- }
-}
-
-/*
-** Function to open a string to be input unit
-*/
-int lua_openstring (char *s)
-{
- lua_linenumber = 1;
- lua_setinput (stringinput);
- st = s;
- {
-  char sn[64];
-  sprintf (sn, "String: %10.10s...", s);
-  if (lua_addfile (sn)) return 1;
- }
- return 0;
-}
-
-/*
-** Function to close an opened string
-*/
-void lua_closestring (void)
-{
- lua_delfile();
-}
-
-/*
-** Call user function to handle error messages, if registred. Or report error
-** using standard function (fprintf).
-*/
-void lua_error (char *s)
-{
- if (usererror != NULL) usererror (s);
- else			    fprintf (stderr, "lua: %s\n", s);
-}
-
-/*
-** Called to execute  SETFUNCTION opcode, this function pushs a function into
-** function stack. Return 0 on success or 1 on error.
-*/
-int lua_pushfunction (int file, int function)
-{
- if (nfuncstack >= MAXFUNCSTACK-1)
- {
-  lua_error ("function stack overflow");
-  return 1;
- }
- funcstack[nfuncstack].file = file;
- funcstack[nfuncstack].function = function;
- nfuncstack++;
- return 0;
-}
-
-/*
-** Called to execute  RESET opcode, this function pops a function from 
-** function stack.
-*/
-void lua_popfunction (void)
-{
- nfuncstack--;
-}
-
-/*
-** Report bug building a message and sending it to lua_error function.
-*/
-void lua_reportbug (char *s)
-{
- char msg[1024];
- strcpy (msg, s);
- if (lua_debugline != 0)
- {
-  int i;
-  if (nfuncstack > 0)
-  {
-   sprintf (strchr(msg,0), 
-         "\n\tin statement begining at line %d in function \"%s\" of file \"%s\"",
-         lua_debugline, lua_varname(funcstack[nfuncstack-1].function),
-  	 lua_file[funcstack[nfuncstack-1].file]);
-   sprintf (strchr(msg,0), "\n\tactive stack\n");
-   for (i=nfuncstack-1; i>=0; i--)
-    sprintf (strchr(msg,0), "\t-> function \"%s\" of file \"%s\"\n", 
-                            lua_varname(funcstack[i].function),
-			    lua_file[funcstack[i].file]);
-  }
-  else
-  {
-   sprintf (strchr(msg,0),
-         "\n\tin statement begining at line %d of file \"%s\"", 
-         lua_debugline, lua_filename());
-  }
- }
- lua_error (msg);
-}
-

inout.h

@@ -1,21 +0,0 @@
-/*
-** $Id: $
-*/
-
-
-#ifndef inout_h
-#define inout_h
-
-extern int lua_linenumber;
-extern int lua_debug;
-extern int lua_debugline;
-
-int  lua_openfile     (char *fn);
-void lua_closefile    (void);
-int  lua_openstring   (char *s);
-void lua_closestring  (void);
-int  lua_pushfunction (int file, int function);
-void lua_popfunction  (void);
-void lua_reportbug    (char *s);
-
-#endif

iolib.c

@@ -1,479 +0,0 @@
-/*
-** iolib.c
-** Input/output library to LUA
-*/
-
-char *rcs_iolib="$Id: iolib.c,v 1.3 1994/03/28 15:14:02 celes Exp celes $";
-
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <ctype.h>
-#include <sys/stat.h>
-#ifdef __GNUC__
-#include <floatingpoint.h>
-#endif
-
-#include "mm.h"
-
-#include "lua.h"
-
-static FILE *in=stdin, *out=stdout;
-
-/*
-** Open a file to read.
-** LUA interface:
-**			status = readfrom (filename)
-** where:
-**			status = 1 -> success
-**			status = 0 -> error
-*/
-static void io_readfrom (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart input */
- {
-  if (in != stdin)
-  {
-   fclose (in);
-   in = stdin;
-  }
-  lua_pushnumber (1);
- }
- else
- {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'readfrom`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   FILE *fp = fopen (lua_getstring(o),"r");
-   if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
-   else
-   {
-    if (in != stdin) fclose (in);
-    in = fp;
-    lua_pushnumber (1);
-   }
-  }
- }
-}
-
-
-/*
-** Open a file to write.
-** LUA interface:
-**			status = writeto (filename)
-** where:
-**			status = 1 -> success
-**			status = 0 -> error
-*/
-static void io_writeto (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
- {
-  if (out != stdout)
-  {
-   fclose (out);
-   out = stdout;
-  }
-  lua_pushnumber (1);
- }
- else
- {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'writeto`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   FILE *fp = fopen (lua_getstring(o),"w");
-   if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
-   else
-   {
-    if (out != stdout) fclose (out);
-    out = fp;
-    lua_pushnumber (1);
-   }
-  }
- }
-}
-
-
-/*
-** Open a file to write appended.
-** LUA interface:
-**			status = appendto (filename)
-** where:
-**			status = 2 -> success (already exist)
-**			status = 1 -> success (new file)
-**			status = 0 -> error
-*/
-static void io_appendto (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
- {
-  if (out != stdout)
-  {
-   fclose (out);
-   out = stdout;
-  }
-  lua_pushnumber (1);
- }
- else
- {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'appendto`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   int r;
-   FILE *fp;
-   struct stat st;
-   if (stat(lua_getstring(o), &st) == -1) r = 1;
-   else                                   r = 2;
-   fp = fopen (lua_getstring(o),"a");
-   if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
-   else
-   {
-    if (out != stdout) fclose (out);
-    out = fp;
-    lua_pushnumber (r);
-   }
-  }
- }
-}
-
-
-
-/*
-** Read a variable. On error put nil on stack.
-** LUA interface:
-**			variable = read ([format])
-**
-** O formato pode ter um dos seguintes especificadores:
-**
-**	s ou S -> para string
-**	f ou F, g ou G, e ou E -> para reais
-**	i ou I -> para inteiros
-**
-**	Estes especificadores podem vir seguidos de numero que representa
-**	o numero de campos a serem lidos.
-*/
-static void io_read (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring(o))	/* free format */
- {
-  int c;
-  char s[256];
-  while (isspace(c=fgetc(in)))
-   ;
-  if (c == '\"')
-  {
-   int c, n=0;
-   while((c = fgetc(in)) != '\"')
-   {
-    if (c == EOF)
-    {
-     lua_pushnil ();
-     return;
-    }
-    s[n++] = c;
-   }
-   s[n] = 0;
-  }
-  else if (c == '\'')
-  {
-   int c, n=0;
-   while((c = fgetc(in)) != '\'')
-   {
-    if (c == EOF)
-    {
-     lua_pushnil ();
-     return;
-    }
-    s[n++] = c;
-   }
-   s[n] = 0;
-  }
-  else
-  {
-   char *ptr;
-   double d;
-   ungetc (c, in);
-   if (fscanf (in, "%s", s) != 1)
-   {
-    lua_pushnil ();
-    return;
-   }
-   d = strtod (s, &ptr);
-   if (!(*ptr))
-   {
-    lua_pushnumber (d);
-    return;
-   }
-  }
-  lua_pushstring (s);
-  return;
- }
- else				/* formatted */
- {
-  char *e = lua_getstring(o);
-  char t;
-  int  m=0;
-  while (isspace(*e)) e++;
-  t = *e++;
-  while (isdigit(*e))
-   m = m*10 + (*e++ - '0');
-  
-  if (m > 0)
-  {
-   char f[80];
-   char s[256];
-   sprintf (f, "%%%ds", m);
-   if (fgets (s, m, in) == NULL)
-   {
-    lua_pushnil();
-    return;
-   }
-   else
-   {
-    if (s[strlen(s)-1] == '\n')
-     s[strlen(s)-1] = 0;
-   }
-   switch (tolower(t))
-   {
-    case 'i':
-    {
-     long int l;
-     sscanf (s, "%ld", &l);
-     lua_pushnumber(l);
-    }
-    break;
-    case 'f': case 'g': case 'e':
-    {
-     float f;
-     sscanf (s, "%f", &f);
-     lua_pushnumber(f);
-    }
-    break;
-    default: 
-     lua_pushstring(s); 
-    break;
-   }
-  }
-  else
-  {
-   switch (tolower(t))
-   {
-    case 'i':
-    {
-     long int l;
-     if (fscanf (in, "%ld", &l) == EOF)
-       lua_pushnil();
-       else lua_pushnumber(l);
-    }
-    break;
-    case 'f': case 'g': case 'e':
-    {
-     float f;
-     if (fscanf (in, "%f", &f) == EOF)
-       lua_pushnil();
-       else lua_pushnumber(f);
-    }
-    break;
-    default: 
-    {
-     char s[256];
-     if (fscanf (in, "%s", s) == EOF)
-       lua_pushnil();
-       else lua_pushstring(s);
-    }
-    break;
-   }
-  }
- }
-}
-
-
-/*
-** Write a variable. On error put 0 on stack, otherwise put 1.
-** LUA interface:
-**			status = write (variable [,format])
-**
-** O formato pode ter um dos seguintes especificadores:
-**
-**	s ou S -> para string
-**	f ou F, g ou G, e ou E -> para reais
-**	i ou I -> para inteiros
-**
-**	Estes especificadores podem vir seguidos de:
-**
-**		[?][m][.n]
-**
-**	onde:
-**		? -> indica justificacao
-**			< = esquerda
-**			| = centro
-**			> = direita (default)
-**		m -> numero maximo de campos (se exceder estoura)
-**		n -> indica precisao para
-**			reais -> numero de casas decimais
-**			inteiros -> numero minimo de digitos
-**			string -> nao se aplica
-*/
-static char *buildformat (char *e, lua_Object o)
-{
- static char buffer[512];
- static char f[80];
- char *string = &buffer[255];
- char t, j='r';
- int  m=0, n=0, l;
- while (isspace(*e)) e++;
- t = *e++;
- if (*e == '<' || *e == '|' || *e == '>') j = *e++;
- while (isdigit(*e))
-  m = m*10 + (*e++ - '0');
- e++;	/* skip point */
- while (isdigit(*e))
-  n = n*10 + (*e++ - '0');
-
- sprintf(f,"%%");
- if (j == '<' || j == '|') sprintf(strchr(f,0),"-");
- if (m != 0)   sprintf(strchr(f,0),"%d", m);
- if (n != 0)   sprintf(strchr(f,0),".%d", n);
- sprintf(strchr(f,0), "%c", t);
- switch (tolower(t))
- {
-  case 'i': t = 'i';
-   sprintf (string, f, (long int)lua_getnumber(o));
-  break;
-  case 'f': case 'g': case 'e': t = 'f';
-   sprintf (string, f, (float)lua_getnumber(o));
-  break;
-  case 's': t = 's';
-   sprintf (string, f, lua_getstring(o));
-  break;
-  default: return "";
- }
- l = strlen(string);
- if (m!=0 && l>m)
- {
-  int i;
-  for (i=0; i<m; i++)
-   string[i] = '*';
-  string[i] = 0;
- }
- else if (m!=0 && j=='|')
- {
-  int i=l-1;
-  while (isspace(string[i])) i--;
-  string -= (m-i) / 2;
-  i=0;
-  while (string[i]==0) string[i++] = ' ';
-  string[l] = 0;
- }
- return string;
-}
-static void io_write (void)
-{
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (o1 == NULL)			/* new line */
- {
-  fprintf (out, "\n");
-  lua_pushnumber(1);
- }
- else if (o2 == NULL)   		/* free format */
- {
-  int status=0;
-  if (lua_isnumber(o1))
-   status = fprintf (out, "%g", lua_getnumber(o1));
-  else if (lua_isstring(o1))
-   status = fprintf (out, "%s", lua_getstring(o1));
-  lua_pushnumber(status);
- }
- else					/* formated */
- {
-  if (!lua_isstring(o2))
-  { 
-   lua_error ("incorrect format to function `write'"); 
-   lua_pushnumber(0);
-   return;
-  }
-  lua_pushnumber(fprintf (out, "%s", buildformat(lua_getstring(o2),o1)));
- }
-}
-
-/*
-** Execute a executable program using "system".
-** Return the result of execution.
-*/
-void io_execute (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
- {
-  lua_error ("incorrect argument to function 'execute`");
-  lua_pushnumber (0);
- }
- else
- {
-  int res = system(lua_getstring(o));
-  lua_pushnumber (res);
- }
- return;
-}
-
-/*
-** Remove a file.
-** On error put 0 on stack, otherwise put 1.
-*/
-void io_remove  (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
- {
-  lua_error ("incorrect argument to function 'execute`");
-  lua_pushnumber (0);
- }
- else
- {
-  if (remove(lua_getstring(o)) == 0)
-   lua_pushnumber (1);
-  else
-   lua_pushnumber (0);
- }
- return;
-}
-
-/*
-** Open io library
-*/
-void iolib_open (void)
-{
- lua_register ("readfrom", io_readfrom);
- lua_register ("writeto",  io_writeto);
- lua_register ("appendto", io_appendto);
- lua_register ("read",     io_read);
- lua_register ("write",    io_write);
- lua_register ("execute",  io_execute);
- lua_register ("remove",   io_remove);
-}

lapi.h

@@ -0,0 +1,16 @@
+/*
+** $Id: lapi.h,v 2.1 2003/12/10 12:13:36 roberto Exp roberto $
+** Auxiliary functions from Lua API
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lapi_h
+#define lapi_h
+
+
+#include "lobject.h"
+
+
+LUAI_FUNC void luaA_pushobject (lua_State *L, const TValue *o);
+
+#endif

lauxlib.c

@@ -0,0 +1,630 @@
+/*
+** $Id: lauxlib.c,v 1.151 2005/08/26 17:36:32 roberto Exp roberto $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* This file uses only the official API of Lua.
+** Any function declared here could be written as an application function.
+*/
+
+#define lauxlib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+
+
+#define FREELIST_REF	0	/* free list of references */
+
+
+/* convert a stack index to positive */
+#define abs_index(L, i)		((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \
+					lua_gettop(L) + (i) + 1)
+
+
+/*
+** {======================================================
+** Error-report functions
+** =======================================================
+*/
+
+
+LUALIB_API int luaL_argerror (lua_State *L, int narg, const char *extramsg) {
+  lua_Debug ar;
+  if (!lua_getstack(L, 0, &ar))  /* no stack frame? */
+    return luaL_error(L, "bad argument #%d (%s)", narg, extramsg);
+  lua_getinfo(L, "n", &ar);
+  if (strcmp(ar.namewhat, "method") == 0) {
+    narg--;  /* do not count `self' */
+    if (narg == 0)  /* error is in the self argument itself? */
+      return luaL_error(L, "calling " LUA_QS " on bad self (%s)",
+                           ar.name, extramsg);
+  }
+  if (ar.name == NULL)
+    ar.name = "?";
+  return luaL_error(L, "bad argument #%d to " LUA_QS " (%s)",
+                        narg, ar.name, extramsg);
+}
+
+
+LUALIB_API int luaL_typerror (lua_State *L, int narg, const char *tname) {
+  const char *msg = lua_pushfstring(L, "%s expected, got %s",
+                                    tname, luaL_typename(L, narg));
+  return luaL_argerror(L, narg, msg);
+}
+
+
+static void tag_error (lua_State *L, int narg, int tag) {
+  luaL_typerror(L, narg, lua_typename(L, tag));
+}
+
+
+LUALIB_API void luaL_where (lua_State *L, int level) {
+  lua_Debug ar;
+  if (lua_getstack(L, level, &ar)) {  /* check function at level */
+    lua_getinfo(L, "Sl", &ar);  /* get info about it */
+    if (ar.currentline > 0) {  /* is there info? */
+      lua_pushfstring(L, "%s:%d: ", ar.short_src, ar.currentline);
+      return;
+    }
+  }
+  lua_pushliteral(L, "");  /* else, no information available... */
+}
+
+
+LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
+  va_list argp;
+  va_start(argp, fmt);
+  luaL_where(L, 1);
+  lua_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  lua_concat(L, 2);
+  return lua_error(L);
+}
+
+/* }====================================================== */
+
+
+LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
+                                 const char *const lst[]) {
+  const char *name = (def) ? luaL_optstring(L, narg, def) :
+                             luaL_checkstring(L, narg);
+  int i;
+  for (i=0; lst[i]; i++)
+    if (strcmp(lst[i], name) == 0)
+      return i;
+  return luaL_argerror(L, narg,
+                       lua_pushfstring(L, "invalid option " LUA_QS, name));
+}
+
+
+LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
+  lua_getfield(L, LUA_REGISTRYINDEX, tname);  /* get registry.name */
+  if (!lua_isnil(L, -1))  /* name already in use? */
+    return 0;  /* leave previous value on top, but return 0 */
+  lua_pop(L, 1);
+  lua_newtable(L);  /* create metatable */
+  lua_pushvalue(L, -1);
+  lua_setfield(L, LUA_REGISTRYINDEX, tname);  /* registry.name = metatable */
+  return 1;
+}
+
+
+LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
+  void *p = lua_touserdata(L, ud);
+  lua_getfield(L, LUA_REGISTRYINDEX, tname);  /* get correct metatable */
+  if (p == NULL || !lua_getmetatable(L, ud) || !lua_rawequal(L, -1, -2))
+    luaL_typerror(L, ud, tname);
+  lua_pop(L, 2);  /* remove both metatables */
+  return p;
+}
+
+
+LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {
+  if (!lua_checkstack(L, space))
+    luaL_error(L, "stack overflow (%s)", mes);
+}
+
+
+LUALIB_API void luaL_checktype (lua_State *L, int narg, int t) {
+  if (lua_type(L, narg) != t)
+    tag_error(L, narg, t);
+}
+
+
+LUALIB_API void luaL_checkany (lua_State *L, int narg) {
+  if (lua_type(L, narg) == LUA_TNONE)
+    luaL_argerror(L, narg, "value expected");
+}
+
+
+LUALIB_API const char *luaL_checklstring (lua_State *L, int narg, size_t *len) {
+  const char *s = lua_tolstring(L, narg, len);
+  if (!s) tag_error(L, narg, LUA_TSTRING);
+  return s;
+}
+
+
+LUALIB_API const char *luaL_optlstring (lua_State *L, int narg,
+                                        const char *def, size_t *len) {
+  if (lua_isnoneornil(L, narg)) {
+    if (len)
+      *len = (def ? strlen(def) : 0);
+    return def;
+  }
+  else return luaL_checklstring(L, narg, len);
+}
+
+
+LUALIB_API lua_Number luaL_checknumber (lua_State *L, int narg) {
+  lua_Number d = lua_tonumber(L, narg);
+  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */
+    tag_error(L, narg, LUA_TNUMBER);
+  return d;
+}
+
+
+LUALIB_API lua_Number luaL_optnumber (lua_State *L, int narg, lua_Number def) {
+  if (lua_isnoneornil(L, narg)) return def;
+  else return luaL_checknumber(L, narg);
+}
+
+
+LUALIB_API lua_Integer luaL_checkinteger (lua_State *L, int narg) {
+  lua_Integer d = lua_tointeger(L, narg);
+  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */
+    tag_error(L, narg, LUA_TNUMBER);
+  return d;
+}
+
+
+LUALIB_API lua_Integer luaL_optinteger (lua_State *L, int narg,
+                                        lua_Integer def) {
+  if (lua_isnoneornil(L, narg)) return def;
+  else return luaL_checkinteger(L, narg);
+}
+
+
+LUALIB_API int luaL_getmetafield (lua_State *L, int obj, const char *event) {
+  if (!lua_getmetatable(L, obj))  /* no metatable? */
+    return 0;
+  lua_getfield(L, -1, event);
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 2);  /* remove metatable and metafield */
+    return 0;
+  }
+  else {
+    lua_remove(L, -2);  /* remove only metatable */
+    return 1;
+  }
+}
+
+
+LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
+  obj = abs_index(L, obj);
+  if (!luaL_getmetafield(L, obj, event))  /* no metafield? */
+    return 0;
+  lua_pushvalue(L, obj);
+  lua_call(L, 1, 1);
+  return 1;
+}
+
+
+LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
+                                const luaL_Reg *l) {
+  luaI_openlib(L, libname, l, 0);
+}
+
+
+LUALIB_API void luaI_openlib (lua_State *L, const char *libname,
+                              const luaL_Reg *l, int nup) {
+  if (libname) {
+    /* check whether lib already exists */
+    lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+    lua_getfield(L, -1, libname);  /* get _LOADED[libname] */
+    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) */
+      if (luaL_findtable(L, LUA_GLOBALSINDEX, libname) != NULL)
+        luaL_error(L, "name conflict for module " LUA_QS, libname);
+      lua_pushvalue(L, -1);
+      lua_setfield(L, -3, libname);  /* _LOADED[libname] = new table */
+    }
+    lua_remove(L, -2);  /* remove _LOADED table */
+    lua_insert(L, -(nup+1));  /* move library table to below upvalues */
+  }
+  for (; l->name; l++) {
+    int i;
+    for (i=0; i<nup; i++)  /* copy upvalues to the top */
+      lua_pushvalue(L, -nup);
+    lua_pushcclosure(L, l->func, nup);
+    lua_setfield(L, -(nup+2), l->name);
+  }
+  lua_pop(L, nup);  /* remove upvalues */
+}
+
+
+
+/*
+** {======================================================
+** getn-setn: size for arrays
+** =======================================================
+*/
+
+#if defined(LUA_COMPAT_GETN)
+
+static int checkint (lua_State *L, int topop) {
+  int n = (lua_type(L, -1) == LUA_TNUMBER) ? lua_tointeger(L, -1) : -1;
+  lua_pop(L, topop);
+  return n;
+}
+
+
+static void getsizes (lua_State *L) {
+  lua_getfield(L, LUA_REGISTRYINDEX, "LUA_SIZES");
+  if (lua_isnil(L, -1)) {  /* no `size' table? */
+    lua_pop(L, 1);  /* remove nil */
+    lua_newtable(L);  /* create it */
+    lua_pushvalue(L, -1);  /* `size' will be its own metatable */
+    lua_setmetatable(L, -2);
+    lua_pushliteral(L, "kv");
+    lua_setfield(L, -2, "__mode");  /* metatable(N).__mode = "kv" */
+    lua_pushvalue(L, -1);
+    lua_setfield(L, LUA_REGISTRYINDEX, "LUA_SIZES");  /* store in register */
+  }
+}
+
+
+LUALIB_API void luaL_setn (lua_State *L, int t, int n) {
+  t = abs_index(L, t);
+  getsizes(L);
+  lua_pushvalue(L, t);
+  lua_pushinteger(L, n);
+  lua_rawset(L, -3);  /* sizes[t] = n */
+  lua_pop(L, 1);  /* remove `sizes' */
+}
+
+
+LUALIB_API int luaL_getn (lua_State *L, int t) {
+  int n;
+  t = abs_index(L, t);
+  getsizes(L);  /* try sizes[t] */
+  lua_pushvalue(L, t);
+  lua_rawget(L, -2);
+  if ((n = checkint(L, 2)) >= 0) return n;
+  lua_getfield(L, t, "n");  /* else try t.n */
+  if ((n = checkint(L, 1)) >= 0) return n;
+  return lua_objlen(L, t);
+}
+
+#endif
+
+/* }====================================================== */
+
+
+
+LUALIB_API const char *luaL_gsub (lua_State *L, const char *s, const char *p,
+                                                               const char *r) {
+  const char *wild;
+  size_t l = strlen(p);
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  while ((wild = strstr(s, p)) != NULL) {
+    luaL_addlstring(&b, s, wild - s);  /* push prefix */
+    luaL_addstring(&b, r);  /* push replacement in place of pattern */
+    s = wild + l;  /* continue after `p' */
+  }
+  luaL_addstring(&b, s);  /* push last suffix */
+  luaL_pushresult(&b);
+  return lua_tostring(L, -1);
+}
+
+
+LUALIB_API const char *luaL_findtable (lua_State *L, int idx,
+                                       const char *fname) {
+  const char *e;
+  lua_pushvalue(L, idx);
+  do {
+    e = strchr(fname, '.');
+    if (e == NULL) e = fname + strlen(fname);
+    lua_pushlstring(L, fname, e - fname);
+    lua_rawget(L, -2);
+    if (lua_isnil(L, -1)) {  /* no such field? */
+      lua_pop(L, 1);  /* remove this nil */
+      lua_newtable(L);  /* create a new table for field */
+      lua_pushlstring(L, fname, e - fname);
+      lua_pushvalue(L, -2);
+      lua_settable(L, -4);  /* set new table into field */
+    }
+    else if (!lua_istable(L, -1)) {  /* field has a non-table value? */
+      lua_pop(L, 2);  /* remove table and value */
+      return fname;  /* return problematic part of the name */
+    }
+    lua_remove(L, -2);  /* remove previous table */
+    fname = e + 1;
+  } while (*e == '.');
+  return NULL;
+}
+
+
+
+/*
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
+*/
+
+
+#define bufflen(B)	((B)->p - (B)->buffer)
+#define bufffree(B)	((size_t)(LUAL_BUFFERSIZE - bufflen(B)))
+
+#define LIMIT	(LUA_MINSTACK/2)
+
+
+static int emptybuffer (luaL_Buffer *B) {
+  size_t l = bufflen(B);
+  if (l == 0) return 0;  /* put nothing on stack */
+  else {
+    lua_pushlstring(B->L, B->buffer, l);
+    B->p = B->buffer;
+    B->lvl++;
+    return 1;
+  }
+}
+
+
+static void adjuststack (luaL_Buffer *B) {
+  if (B->lvl > 1) {
+    lua_State *L = B->L;
+    int toget = 1;  /* number of levels to concat */
+    size_t toplen = lua_strlen(L, -1);
+    do {
+      size_t l = lua_strlen(L, -(toget+1));
+      if (B->lvl - toget + 1 >= LIMIT || toplen > l) {
+        toplen += l;
+        toget++;
+      }
+      else break;
+    } while (toget < B->lvl);
+    lua_concat(L, toget);
+    B->lvl = B->lvl - toget + 1;
+  }
+}
+
+
+LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
+  if (emptybuffer(B))
+    adjuststack(B);
+  return B->buffer;
+}
+
+
+LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
+  while (l--)
+    luaL_addchar(B, *s++);
+}
+
+
+LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
+  luaL_addlstring(B, s, strlen(s));
+}
+
+
+LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
+  emptybuffer(B);
+  lua_concat(B->L, B->lvl);
+  B->lvl = 1;
+}
+
+
+LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
+  lua_State *L = B->L;
+  size_t vl;
+  const char *s = lua_tolstring(L, -1, &vl);
+  if (vl <= bufffree(B)) {  /* fit into buffer? */
+    memcpy(B->p, s, vl);  /* put it there */
+    B->p += vl;
+    lua_pop(L, 1);  /* remove from stack */
+  }
+  else {
+    if (emptybuffer(B))
+      lua_insert(L, -2);  /* put buffer before new value */
+    B->lvl++;  /* add new value into B stack */
+    adjuststack(B);
+  }
+}
+
+
+LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
+  B->L = L;
+  B->p = B->buffer;
+  B->lvl = 0;
+}
+
+/* }====================================================== */
+
+
+LUALIB_API int luaL_ref (lua_State *L, int t) {
+  int ref;
+  t = abs_index(L, t);
+  if (lua_isnil(L, -1)) {
+    lua_pop(L, 1);  /* remove from stack */
+    return LUA_REFNIL;  /* `nil' has a unique fixed reference */
+  }
+  lua_rawgeti(L, t, FREELIST_REF);  /* get first free element */
+  ref = (int)lua_tointeger(L, -1);  /* ref = t[FREELIST_REF] */
+  lua_pop(L, 1);  /* remove it from stack */
+  if (ref != 0) {  /* any free element? */
+    lua_rawgeti(L, t, ref);  /* remove it from list */
+    lua_rawseti(L, t, FREELIST_REF);  /* (t[FREELIST_REF] = t[ref]) */
+  }
+  else {  /* no free elements */
+    ref = lua_objlen(L, t);
+    ref++;  /* create new reference */
+  }
+  lua_rawseti(L, t, ref);
+  return ref;
+}
+
+
+LUALIB_API void luaL_unref (lua_State *L, int t, int ref) {
+  if (ref >= 0) {
+    t = abs_index(L, t);
+    lua_rawgeti(L, t, FREELIST_REF);
+    lua_rawseti(L, t, ref);  /* t[ref] = t[FREELIST_REF] */
+    lua_pushinteger(L, ref);
+    lua_rawseti(L, t, FREELIST_REF);  /* t[FREELIST_REF] = ref */
+  }
+}
+
+
+
+/*
+** {======================================================
+** Load functions
+** =======================================================
+*/
+
+typedef struct LoadF {
+  int extraline;
+  FILE *f;
+  char buff[LUAL_BUFFERSIZE];
+} LoadF;
+
+
+static const char *getF (lua_State *L, void *ud, size_t *size) {
+  LoadF *lf = (LoadF *)ud;
+  (void)L;
+  if (lf->extraline) {
+    lf->extraline = 0;
+    *size = 1;
+    return "\n";
+  }
+  if (feof(lf->f)) return NULL;
+  *size = fread(lf->buff, 1, LUAL_BUFFERSIZE, lf->f);
+  return (*size > 0) ? lf->buff : NULL;
+}
+
+
+static int errfile (lua_State *L, const char *what, int fnameindex) {
+  const char *serr = strerror(errno);
+  const char *filename = lua_tostring(L, fnameindex) + 1;
+  lua_pushfstring(L, "cannot %s %s: %s", what, filename, serr);
+  lua_remove(L, fnameindex);
+  return LUA_ERRFILE;
+}
+
+
+LUALIB_API int luaL_loadfile (lua_State *L, const char *filename) {
+  LoadF lf;
+  int status, readstatus;
+  int c;
+  int fnameindex = lua_gettop(L) + 1;  /* index of filename on the stack */
+  lf.extraline = 0;
+  if (filename == NULL) {
+    lua_pushliteral(L, "=stdin");
+    lf.f = stdin;
+  }
+  else {
+    lua_pushfstring(L, "@%s", filename);
+    lf.f = fopen(filename, "r");
+    if (lf.f == NULL) return errfile(L, "open", fnameindex);
+  }
+  c = getc(lf.f);
+  if (c == '#') {  /* Unix exec. file? */
+    lf.extraline = 1;
+    while ((c = getc(lf.f)) != EOF && c != '\n') ;  /* skip first line */
+    if (c == '\n') c = getc(lf.f);
+  }
+  if (c == LUA_SIGNATURE[0] && lf.f != stdin) {  /* binary file? */
+    fclose(lf.f);
+    lf.f = fopen(filename, "rb");  /* reopen in binary mode */
+    if (lf.f == NULL) return errfile(L, "reopen", fnameindex);
+    /* skip eventual `#!...' */
+   while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
+    lf.extraline = 0;
+  }
+  ungetc(c, lf.f);
+  status = lua_load(L, getF, &lf, lua_tostring(L, -1));
+  readstatus = ferror(lf.f);
+  if (lf.f != stdin) fclose(lf.f);  /* close file (even in case of errors) */
+  if (readstatus) {
+    lua_settop(L, fnameindex);  /* ignore results from `lua_load' */
+    return errfile(L, "read", fnameindex);
+  }
+  lua_remove(L, fnameindex);
+  return status;
+}
+
+
+typedef struct LoadS {
+  const char *s;
+  size_t size;
+} LoadS;
+
+
+static const char *getS (lua_State *L, void *ud, size_t *size) {
+  LoadS *ls = (LoadS *)ud;
+  (void)L;
+  if (ls->size == 0) return NULL;
+  *size = ls->size;
+  ls->size = 0;
+  return ls->s;
+}
+
+
+LUALIB_API int luaL_loadbuffer (lua_State *L, const char *buff, size_t size,
+                                const char *name) {
+  LoadS ls;
+  ls.s = buff;
+  ls.size = size;
+  return lua_load(L, getS, &ls, name);
+}
+
+
+LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s) {
+  return luaL_loadbuffer(L, s, strlen(s), s);
+}
+
+
+
+/* }====================================================== */
+
+
+static void *l_alloc (void *ud, void *ptr, size_t osize, size_t nsize) {
+  (void)ud;
+  (void)osize;
+  if (nsize == 0) {
+    free(ptr);
+    return NULL;
+  }
+  else
+    return realloc(ptr, nsize);
+}
+
+
+static int panic (lua_State *L) {
+  (void)L;  /* to avoid warnings */
+  fprintf(stderr, "PANIC: unprotected error in call to Lua API (%s)\n",
+                   lua_tostring(L, -1));
+  return 0;
+}
+
+
+LUALIB_API lua_State *luaL_newstate (void) {
+  lua_State *L = lua_newstate(l_alloc, NULL);
+  if (L) lua_atpanic(L, &panic);
+  return L;
+}
+

lauxlib.h

@@ -0,0 +1,171 @@
+/*
+** $Id: lauxlib.h,v 1.84 2005/08/26 17:36:32 roberto Exp roberto $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lauxlib_h
+#define lauxlib_h
+
+
+#include <stddef.h>
+#include <stdio.h>
+
+#include "lua.h"
+
+
+#if defined(LUA_COMPAT_GETN)
+LUALIB_API int (luaL_getn) (lua_State *L, int t);
+LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
+#else
+#define luaL_getn(L,i)          ((int)lua_objlen(L, i))
+#define luaL_setn(L,i,j)        ((void)0)  /* no op! */
+#endif
+
+#if defined(LUA_COMPAT_OPENLIB)
+#define luaI_openlib	luaL_openlib
+#endif
+
+
+/* extra error code for `luaL_load' */
+#define LUA_ERRFILE     (LUA_ERRERR+1)
+
+
+typedef struct luaL_Reg {
+  const char *name;
+  lua_CFunction func;
+} luaL_Reg;
+
+
+
+LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
+                                const luaL_Reg *l, int nup);
+LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
+                                const luaL_Reg *l);
+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 int (luaL_typerror) (lua_State *L, int narg, const char *tname);
+LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
+LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
+                                                          size_t *l);
+LUALIB_API const char *(luaL_optlstring) (lua_State *L, int numArg,
+                                          const char *def, size_t *l);
+LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int numArg);
+LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
+
+LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
+LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
+                                          lua_Integer 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_checkany) (lua_State *L, int narg);
+
+LUALIB_API int   (luaL_newmetatable) (lua_State *L, const char *tname);
+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,
+                                   const char *const lst[]);
+
+LUALIB_API int (luaL_ref) (lua_State *L, int t);
+LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
+
+LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename);
+LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz,
+                                  const char *name);
+LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
+
+LUALIB_API lua_State *(luaL_newstate) (void);
+
+
+LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
+                                                  const char *r);
+
+LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
+                                         const char *fname);
+
+
+
+
+/*
+** ===============================================================
+** some useful macros
+** ===============================================================
+*/
+
+#define luaL_argcheck(L, cond,numarg,extramsg)	\
+		((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
+#define luaL_checkstring(L,n)	(luaL_checklstring(L, (n), NULL))
+#define luaL_optstring(L,n,d)	(luaL_optlstring(L, (n), (d), NULL))
+#define luaL_checkint(L,n)	((int)luaL_checkinteger(L, (n)))
+#define luaL_optint(L,n,d)	((int)luaL_optinteger(L, (n), (d)))
+#define luaL_checklong(L,n)	((long)luaL_checkinteger(L, (n)))
+#define luaL_optlong(L,n,d)	((long)luaL_optinteger(L, (n), (d)))
+
+#define luaL_typename(L,i)	lua_typename(L, lua_type(L,(i)))
+
+#define luaL_dofile(L, fn)	(luaL_loadfile(L, fn) || lua_pcall(L, 0, 0, 0))
+
+#define luaL_dostring(L, s)	(luaL_loadstring(L, s) || lua_pcall(L, 0, 0, 0))
+
+#define luaL_getmetatable(L,n)	(lua_getfield(L, LUA_REGISTRYINDEX, (n)))
+
+
+/*
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
+*/
+
+
+
+typedef struct luaL_Buffer {
+  char *p;			/* current position in buffer */
+  int lvl;  /* number of strings in the stack (level) */
+  lua_State *L;
+  char buffer[LUAL_BUFFERSIZE];
+} luaL_Buffer;
+
+#define luaL_addchar(B,c) \
+  ((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \
+   (*(B)->p++ = (char)(c)))
+
+/* compatibility only */
+#define luaL_putchar(B,c)	luaL_addchar(B,c)
+
+#define luaL_addsize(B,n)	((B)->p += (n))
+
+LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
+LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B);
+LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
+LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
+LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
+LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
+
+
+/* }====================================================== */
+
+
+/* compatibility with ref system */
+
+/* pre-defined references */
+#define LUA_NOREF       (-2)
+#define LUA_REFNIL      (-1)
+
+#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \
+      (lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0))
+
+#define lua_unref(L,ref)        luaL_unref(L, LUA_REGISTRYINDEX, (ref))
+
+#define lua_getref(L,ref)       lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
+
+
+#define luaL_reg	luaL_Reg
+
+#endif
+
+

lbaselib.c

@@ -0,0 +1,633 @@
+/*
+** $Id: lbaselib.c,v 1.181 2005/08/15 14:12:32 roberto Exp roberto $
+** Basic library
+** See Copyright Notice in lua.h
+*/
+
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lbaselib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+
+/*
+** If your system does not support `stdout', you can just remove this function.
+** If you need, you can define your own `print' function, following this
+** model but changing `fputs' to put the strings at a proper place
+** (a console window or a log file, for instance).
+*/
+static int luaB_print (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  lua_getglobal(L, "tostring");
+  for (i=1; i<=n; i++) {
+    const char *s;
+    lua_pushvalue(L, -1);  /* function to be called */
+    lua_pushvalue(L, i);   /* value to print */
+    lua_call(L, 1, 1);
+    s = lua_tostring(L, -1);  /* get result */
+    if (s == NULL)
+      return luaL_error(L, LUA_QL("tostring") " must return a string to "
+                           LUA_QL("print"));
+    if (i>1) fputs("\t", stdout);
+    fputs(s, stdout);
+    lua_pop(L, 1);  /* pop result */
+  }
+  fputs("\n", stdout);
+  return 0;
+}
+
+
+static int luaB_tonumber (lua_State *L) {
+  int base = luaL_optint(L, 2, 10);
+  if (base == 10) {  /* standard conversion */
+    luaL_checkany(L, 1);
+    if (lua_isnumber(L, 1)) {
+      lua_pushnumber(L, lua_tonumber(L, 1));
+      return 1;
+    }
+  }
+  else {
+    const char *s1 = luaL_checkstring(L, 1);
+    char *s2;
+    unsigned long n;
+    luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
+    n = strtoul(s1, &s2, base);
+    if (s1 != s2) {  /* at least one valid digit? */
+      while (isspace((unsigned char)(*s2))) s2++;  /* skip trailing spaces */
+      if (*s2 == '\0') {  /* no invalid trailing characters? */
+        lua_pushnumber(L, (lua_Number)n);
+        return 1;
+      }
+    }
+  }
+  lua_pushnil(L);  /* else not a number */
+  return 1;
+}
+
+
+static int luaB_error (lua_State *L) {
+  int level = luaL_optint(L, 2, 1);
+  lua_settop(L, 1);
+  if (lua_isstring(L, 1) && level > 0) {  /* add extra information? */
+    luaL_where(L, level);
+    lua_pushvalue(L, 1);
+    lua_concat(L, 2);
+  }
+  return lua_error(L);
+}
+
+
+static int luaB_getmetatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_getmetatable(L, 1)) {
+    lua_pushnil(L);
+    return 1;  /* no metatable */
+  }
+  luaL_getmetafield(L, 1, "__metatable");
+  return 1;  /* returns either __metatable field (if present) or metatable */
+}
+
+
+static int luaB_setmetatable (lua_State *L) {
+  int t = lua_type(L, 2);
+  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"))
+    luaL_error(L, "cannot change a protected metatable");
+  lua_settop(L, 2);
+  lua_setmetatable(L, 1);
+  return 1;
+}
+
+
+static void getfunc (lua_State *L) {
+  if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
+  else {
+    lua_Debug ar;
+    int level = luaL_optint(L, 1, 1);
+    luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
+    if (lua_getstack(L, level, &ar) == 0)
+      luaL_argerror(L, 1, "invalid level");
+    lua_getinfo(L, "f", &ar);
+    if (lua_isnil(L, -1))
+      luaL_error(L, "no function environment for tail call at level %d",
+                    level);
+  }
+}
+
+
+static int luaB_getfenv (lua_State *L) {
+  getfunc(L);
+  if (lua_iscfunction(L, -1))  /* is a C function? */
+    lua_pushvalue(L, LUA_GLOBALSINDEX);  /* return the thread's global env. */
+  else
+    lua_getfenv(L, -1);
+  return 1;
+}
+
+
+static int luaB_setfenv (lua_State *L) {
+  luaL_checktype(L, 2, LUA_TTABLE);
+  getfunc(L);
+  lua_pushvalue(L, 2);
+  if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
+    /* change environment of current thread */
+    lua_pushthread(L);
+    lua_insert(L, -2);
+    lua_setfenv(L, -2);
+    return 0;
+  }
+  else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
+    luaL_error(L,
+          LUA_QL("setfenv") " cannot change environment of given object");
+  return 1;
+}
+
+
+static int luaB_rawequal (lua_State *L) {
+  luaL_checkany(L, 1);
+  luaL_checkany(L, 2);
+  lua_pushboolean(L, lua_rawequal(L, 1, 2));
+  return 1;
+}
+
+
+static int luaB_rawget (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  lua_settop(L, 2);
+  lua_rawget(L, 1);
+  return 1;
+}
+
+static int luaB_rawset (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  luaL_checkany(L, 3);
+  lua_settop(L, 3);
+  lua_rawset(L, 1);
+  return 1;
+}
+
+
+static int luaB_gcinfo (lua_State *L) {
+  lua_pushinteger(L, lua_getgccount(L));
+  return 1;
+}
+
+
+static int luaB_collectgarbage (lua_State *L) {
+  static const char *const opts[] = {"stop", "restart", "collect",
+    "count", "step", "setpause", "setstepmul", NULL};
+  static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
+    LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL};
+  int o = luaL_checkoption(L, 1, "collect", opts);
+  int ex = luaL_optinteger(L, 2, 0);
+  lua_pushinteger(L, lua_gc(L, optsnum[o], ex));
+  return 1;
+}
+
+
+static int luaB_type (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushstring(L, luaL_typename(L, 1));
+  return 1;
+}
+
+
+static int luaB_next (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
+  if (lua_next(L, 1))
+    return 2;
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+static int luaB_pairs (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
+  lua_pushvalue(L, 1);  /* state, */
+  lua_pushnil(L);  /* and initial value */
+  return 3;
+}
+
+
+static int ipairsaux (lua_State *L) {
+  int i = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  i++;  /* next value */
+  lua_pushinteger(L, i);
+  lua_rawgeti(L, 1, i);
+  return (lua_isnil(L, -1)) ? 0 : 2;
+}
+
+
+static int luaB_ipairs (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushvalue(L, lua_upvalueindex(1));  /* return generator, */
+  lua_pushvalue(L, 1);  /* state, */
+  lua_pushinteger(L, 0);  /* and initial value */
+  return 3;
+}
+
+
+static int load_aux (lua_State *L, int status) {
+  if (status == 0)  /* OK? */
+    return 1;
+  else {
+    lua_pushnil(L);
+    lua_insert(L, -2);  /* put before error message */
+    return 2;  /* return nil plus error message */
+  }
+}
+
+
+static int luaB_loadstring (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  const char *chunkname = luaL_optstring(L, 2, s);
+  return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
+}
+
+
+static int luaB_loadfile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  return load_aux(L, luaL_loadfile(L, fname));
+}
+
+
+/*
+** Reader for generic `load' function: `lua_load' uses the
+** stack for internal stuff, so the reader cannot change the
+** stack top. Instead, it keeps its resulting string in a
+** reserved slot inside the stack.
+*/
+static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
+  (void)ud;  /* to avoid warnings */
+  luaL_checkstack(L, 2, "too many nested functions");
+  lua_pushvalue(L, 1);  /* get function */
+  lua_call(L, 0, 1);  /* call it */
+  if (lua_isnil(L, -1)) {
+    *size = 0;
+    return NULL;
+  }
+  else if (lua_isstring(L, -1)) {
+    lua_replace(L, 3);  /* save string in a reserved stack slot */
+    return lua_tolstring(L, 3, size);
+  }
+  else luaL_error(L, "reader function must return a string");
+  return NULL;  /* to avoid warnings */
+}
+
+
+static int luaB_load (lua_State *L) {
+  int status;
+  const char *cname = luaL_optstring(L, 2, "=(load)");
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  lua_settop(L, 3);  /* function, eventual name, plus one reserved slot */
+  status = lua_load(L, generic_reader, NULL, cname);
+  return load_aux(L, status);
+}
+
+
+static int luaB_dofile (lua_State *L) {
+  const char *fname = luaL_optstring(L, 1, NULL);
+  int n = lua_gettop(L);
+  if (luaL_loadfile(L, fname) != 0) lua_error(L);
+  lua_call(L, 0, LUA_MULTRET);
+  return lua_gettop(L) - n;
+}
+
+
+static int luaB_assert (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_toboolean(L, 1))
+    return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
+  return lua_gettop(L);
+}
+
+
+static int luaB_unpack (lua_State *L) {
+  int i = luaL_optint(L, 2, 1);
+  int e = luaL_optint(L, 3, -1);
+  int n;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (e == -1)
+    e = luaL_getn(L, 1);
+  n = e - i + 1;  /* number of elements */
+  if (n <= 0) return 0;  /* empty range */
+  luaL_checkstack(L, n, "table too big to unpack");
+  for (; i<=e; i++)  /* push arg[i...e] */
+    lua_rawgeti(L, 1, i);
+  return n;
+}
+
+
+static int luaB_select (lua_State *L) {
+  int n = lua_gettop(L);
+  if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
+    lua_pushinteger(L, n-1);
+    return 1;
+  }
+  else {
+    int i = luaL_checkint(L, 1);
+    if (i <= 0) i = 1;
+    else if (i >= n) i = n;
+    return n - i;
+  }
+}
+
+
+static int luaB_pcall (lua_State *L) {
+  int status;
+  luaL_checkany(L, 1);
+  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
+  lua_pushboolean(L, (status == 0));
+  lua_insert(L, 1);
+  return lua_gettop(L);  /* return status + all results */
+}
+
+
+static int luaB_xpcall (lua_State *L) {
+  int status;
+  luaL_checkany(L, 2);
+  lua_settop(L, 2);
+  lua_insert(L, 1);  /* put error function under function to be called */
+  status = lua_pcall(L, 0, LUA_MULTRET, 1);
+  lua_pushboolean(L, (status == 0));
+  lua_replace(L, 1);
+  return lua_gettop(L);  /* return status + all results */
+}
+
+
+static int luaB_tostring (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (luaL_callmeta(L, 1, "__tostring"))  /* is there a metafield? */
+    return 1;  /* use its value */
+  switch (lua_type(L, 1)) {
+    case LUA_TNUMBER:
+      lua_pushstring(L, lua_tostring(L, 1));
+      break;
+    case LUA_TSTRING:
+      lua_pushvalue(L, 1);
+      break;
+    case LUA_TBOOLEAN:
+      lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
+      break;
+    case LUA_TNIL:
+      lua_pushliteral(L, "nil");
+      break;
+    default:
+      lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1));
+      break;
+  }
+  return 1;
+}
+
+
+static int luaB_newproxy (lua_State *L) {
+  lua_settop(L, 1);
+  lua_newuserdata(L, 0);  /* create proxy */
+  if (lua_toboolean(L, 1) == 0)
+    return 1;  /* no metatable */
+  else if (lua_isboolean(L, 1)) {
+    lua_newtable(L);  /* create a new metatable `m' ... */
+    lua_pushvalue(L, -1);  /* ... and mark `m' as a valid metatable */
+    lua_pushboolean(L, 1);
+    lua_rawset(L, lua_upvalueindex(1));  /* weaktable[m] = true */
+  }
+  else {
+    int validproxy = 0;  /* to check if weaktable[metatable(u)] == true */
+    if (lua_getmetatable(L, 1)) {
+      lua_rawget(L, lua_upvalueindex(1));
+      validproxy = lua_toboolean(L, -1);
+      lua_pop(L, 1);  /* remove value */
+    }
+    luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
+    lua_getmetatable(L, 1);  /* metatable is valid; get it */
+  }
+  lua_setmetatable(L, 2);
+  return 1;
+}
+
+
+static const luaL_Reg base_funcs[] = {
+  {"assert", luaB_assert},
+  {"collectgarbage", luaB_collectgarbage},
+  {"dofile", luaB_dofile},
+  {"error", luaB_error},
+  {"gcinfo", luaB_gcinfo},
+  {"getfenv", luaB_getfenv},
+  {"getmetatable", luaB_getmetatable},
+  {"loadfile", luaB_loadfile},
+  {"load", luaB_load},
+  {"loadstring", luaB_loadstring},
+  {"next", luaB_next},
+  {"pcall", luaB_pcall},
+  {"print", luaB_print},
+  {"rawequal", luaB_rawequal},
+  {"rawget", luaB_rawget},
+  {"rawset", luaB_rawset},
+  {"select", luaB_select},
+  {"setfenv", luaB_setfenv},
+  {"setmetatable", luaB_setmetatable},
+  {"tonumber", luaB_tonumber},
+  {"tostring", luaB_tostring},
+  {"type", luaB_type},
+  {"unpack", luaB_unpack},
+  {"xpcall", luaB_xpcall},
+  {NULL, NULL}
+};
+
+
+/*
+** {======================================================
+** Coroutine library
+** =======================================================
+*/
+
+static int auxresume (lua_State *L, lua_State *co, int narg) {
+  int status;
+  if (!lua_checkstack(co, narg))
+    luaL_error(L, "too many arguments to resume");
+  if (lua_status(co) == 0 && lua_gettop(co) == 0) {
+    lua_pushliteral(L, "cannot resume dead coroutine");
+    return -1;  /* error flag */
+  }
+  lua_xmove(L, co, narg);
+  status = lua_resume(co, narg);
+  if (status == 0 || status == LUA_YIELD) {
+    int nres = lua_gettop(co);
+    if (!lua_checkstack(L, nres))
+      luaL_error(L, "too many results to resume");
+    lua_xmove(co, L, nres);  /* move yielded values */
+    return nres;
+  }
+  else {
+    lua_xmove(co, L, 1);  /* move error message */
+    return -1;  /* error flag */
+  }
+}
+
+
+static int luaB_coresume (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  int r;
+  luaL_argcheck(L, co, 1, "coroutine expected");
+  r = auxresume(L, co, lua_gettop(L) - 1);
+  if (r < 0) {
+    lua_pushboolean(L, 0);
+    lua_insert(L, -2);
+    return 2;  /* return false + error message */
+  }
+  else {
+    lua_pushboolean(L, 1);
+    lua_insert(L, -(r + 1));
+    return r + 1;  /* return true + `resume' returns */
+  }
+}
+
+
+static int luaB_auxwrap (lua_State *L) {
+  lua_State *co = lua_tothread(L, lua_upvalueindex(1));
+  int r = auxresume(L, co, lua_gettop(L));
+  if (r < 0) {
+    if (lua_isstring(L, -1)) {  /* error object is a string? */
+      luaL_where(L, 1);  /* add extra info */
+      lua_insert(L, -2);
+      lua_concat(L, 2);
+    }
+    lua_error(L);  /* propagate error */
+  }
+  return r;
+}
+
+
+static int luaB_cocreate (lua_State *L) {
+  lua_State *NL = lua_newthread(L);
+  luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
+    "Lua function expected");
+  lua_pushvalue(L, 1);  /* move function to top */
+  lua_xmove(L, NL, 1);  /* move function from L to NL */
+  return 1;
+}
+
+
+static int luaB_cowrap (lua_State *L) {
+  luaB_cocreate(L);
+  lua_pushcclosure(L, luaB_auxwrap, 1);
+  return 1;
+}
+
+
+static int luaB_yield (lua_State *L) {
+  return lua_yield(L, lua_gettop(L));
+}
+
+
+static int luaB_costatus (lua_State *L) {
+  lua_State *co = lua_tothread(L, 1);
+  luaL_argcheck(L, co, 1, "coroutine expected");
+  if (L == co) lua_pushliteral(L, "running");
+  else {
+    switch (lua_status(co)) {
+      case LUA_YIELD:
+        lua_pushliteral(L, "suspended");
+        break;
+      case 0: {
+        lua_Debug ar;
+        if (lua_getstack(co, 0, &ar) > 0)  /* does it have frames? */
+          lua_pushliteral(L, "normal");  /* it is running */
+        else if (lua_gettop(co) == 0)
+            lua_pushliteral(L, "dead");
+        else
+          lua_pushliteral(L, "suspended");  /* initial state */
+        break;  
+      }
+      default:  /* some error occured */
+        lua_pushliteral(L, "dead");
+        break;
+    }
+  }
+  return 1;
+}
+
+
+static int luaB_corunning (lua_State *L) {
+  if (lua_pushthread(L))
+    return 0;  /* main thread is not a coroutine */
+  else
+    return 1;
+}
+
+
+static const luaL_Reg co_funcs[] = {
+  {"create", luaB_cocreate},
+  {"resume", luaB_coresume},
+  {"running", luaB_corunning},
+  {"status", luaB_costatus},
+  {"wrap", luaB_cowrap},
+  {"yield", luaB_yield},
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+static void auxopen (lua_State *L, const char *name,
+                     lua_CFunction f, lua_CFunction u) {
+  lua_pushcfunction(L, u);
+  lua_pushcclosure(L, f, 1);
+  lua_setfield(L, -2, name);
+}
+
+
+static void base_open (lua_State *L) {
+  lua_pushvalue(L, LUA_GLOBALSINDEX);
+  luaL_register(L, NULL, base_funcs);  /* open lib into global table */
+  lua_pushliteral(L, LUA_VERSION);
+  lua_setglobal(L, "_VERSION");  /* set global _VERSION */
+  /* `ipairs' and `pairs' need auxiliary functions as upvalues */
+  auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
+  auxopen(L, "pairs", luaB_pairs, luaB_next);
+  /* `newproxy' needs a weaktable as upvalue */
+  lua_newtable(L);  /* new table `w' */
+  lua_pushvalue(L, -1);  /* `w' will be its own metatable */
+  lua_setmetatable(L, -2);
+  lua_pushliteral(L, "kv");
+  lua_setfield(L, -2, "__mode");  /* metatable(w).__mode = "kv" */
+  lua_pushcclosure(L, luaB_newproxy, 1);
+  lua_setglobal(L, "newproxy");  /* set global `newproxy' */
+  /* create register._LOADED to track loaded modules */
+  lua_newtable(L);
+  lua_setfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  /* set global _G */
+  lua_pushvalue(L, LUA_GLOBALSINDEX);
+  lua_setglobal(L, "_G");
+}
+
+
+LUALIB_API int luaopen_base (lua_State *L) {
+  base_open(L);
+  luaL_register(L, LUA_COLIBNAME, co_funcs);
+  return 2;
+}
+

lcode.c

@@ -0,0 +1,782 @@
+/*
+** $Id: lcode.c,v 2.15 2005/08/17 18:32:09 roberto Exp $
+** Code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#define lcode_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "ltable.h"
+
+
+#define hasjumps(e)	((e)->t != (e)->f)
+
+
+void luaK_nil (FuncState *fs, int from, int n) {
+  Instruction *previous;
+  if (fs->pc > fs->lasttarget &&  /* no jumps to current position? */
+      GET_OPCODE(*(previous = &fs->f->code[fs->pc-1])) == OP_LOADNIL) {
+    int pfrom = GETARG_A(*previous);
+    int pto = GETARG_B(*previous);
+    if (pfrom <= from && from <= pto+1) {  /* can connect both? */
+      if (from+n-1 > pto)
+        SETARG_B(*previous, from+n-1);
+      return;
+    }
+  }
+  luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0);  /* else no optimization */
+}
+
+
+int luaK_jump (FuncState *fs) {
+  int jpc = fs->jpc;  /* save list of jumps to here */
+  int j;
+  fs->jpc = NO_JUMP;
+  j = luaK_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
+  luaK_concat(fs, &j, jpc);  /* keep them on hold */
+  return j;
+}
+
+
+void luaK_ret (FuncState *fs, int first, int nret) {
+  luaK_codeABC(fs, OP_RETURN, first, nret+1, 0);
+}
+
+
+static int condjump (FuncState *fs, OpCode op, int A, int B, int C) {
+  luaK_codeABC(fs, op, A, B, C);
+  return luaK_jump(fs);
+}
+
+
+static void fixjump (FuncState *fs, int pc, int dest) {
+  Instruction *jmp = &fs->f->code[pc];
+  int offset = dest-(pc+1);
+  lua_assert(dest != NO_JUMP);
+  if (abs(offset) > MAXARG_sBx)
+    luaX_syntaxerror(fs->ls, "control structure too long");
+  SETARG_sBx(*jmp, offset);
+}
+
+
+/*
+** returns current `pc' and marks it as a jump target (to avoid wrong
+** optimizations with consecutive instructions not in the same basic block).
+*/
+int luaK_getlabel (FuncState *fs) {
+  fs->lasttarget = fs->pc;
+  return fs->pc;
+}
+
+
+static int getjump (FuncState *fs, int pc) {
+  int offset = GETARG_sBx(fs->f->code[pc]);
+  if (offset == NO_JUMP)  /* point to itself represents end of list */
+    return NO_JUMP;  /* end of list */
+  else
+    return (pc+1)+offset;  /* turn offset into absolute position */
+}
+
+
+static Instruction *getjumpcontrol (FuncState *fs, int pc) {
+  Instruction *pi = &fs->f->code[pc];
+  if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1))))
+    return pi-1;
+  else
+    return pi;
+}
+
+
+/*
+** check whether list has any jump that do not produce a value
+** (or produce an inverted value)
+*/
+static int need_value (FuncState *fs, int list) {
+  for (; list != NO_JUMP; list = getjump(fs, list)) {
+    Instruction i = *getjumpcontrol(fs, list);
+    if (GET_OPCODE(i) != OP_TESTSET) return 1;
+  }
+  return 0;  /* not found */
+}
+
+
+static void patchtestreg (Instruction *i, int reg) {
+  if (reg != NO_REG)
+    SETARG_A(*i, reg);
+  else  /* no register to put value; change TESTSET to TEST */
+    *i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i));
+}
+
+
+static void removevalues (FuncState *fs, int list) {
+  for (; list != NO_JUMP; list = getjump(fs, list)) {
+    Instruction *i = getjumpcontrol(fs, list);
+    if (GET_OPCODE(*i) == OP_TESTSET)
+      patchtestreg(i, NO_REG);
+  }
+}
+
+
+static void patchlistaux (FuncState *fs, int list, int vtarget, int reg,
+                          int dtarget) {
+  while (list != NO_JUMP) {
+    int next = getjump(fs, list);
+    Instruction *i = getjumpcontrol(fs, list);
+    if (GET_OPCODE(*i) == OP_TESTSET) {
+      patchtestreg(i, reg);
+      fixjump(fs, list, vtarget);
+    }
+    else
+      fixjump(fs, list, dtarget);  /* jump to default target */
+    list = next;
+  }
+}
+
+
+static void dischargejpc (FuncState *fs) {
+  patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
+  fs->jpc = NO_JUMP;
+}
+
+
+void luaK_patchlist (FuncState *fs, int list, int target) {
+  if (target == fs->pc)
+    luaK_patchtohere(fs, list);
+  else {
+    lua_assert(target < fs->pc);
+    patchlistaux(fs, list, target, NO_REG, target);
+  }
+}
+
+
+void luaK_patchtohere (FuncState *fs, int list) {
+  luaK_getlabel(fs);
+  luaK_concat(fs, &fs->jpc, list);
+}
+
+
+void luaK_concat (FuncState *fs, int *l1, int l2) {
+  if (l2 == NO_JUMP) return;
+  else if (*l1 == NO_JUMP)
+    *l1 = l2;
+  else {
+    int list = *l1;
+    int next;
+    while ((next = getjump(fs, list)) != NO_JUMP)  /* find last element */
+      list = next;
+    fixjump(fs, list, l2);
+  }
+}
+
+
+void luaK_checkstack (FuncState *fs, int n) {
+  int newstack = fs->freereg + n;
+  if (newstack > fs->f->maxstacksize) {
+    if (newstack >= MAXSTACK)
+      luaX_syntaxerror(fs->ls, "function or expression too complex");
+    fs->f->maxstacksize = cast(lu_byte, newstack);
+  }
+}
+
+
+void luaK_reserveregs (FuncState *fs, int n) {
+  luaK_checkstack(fs, n);
+  fs->freereg += n;
+}
+
+
+static void freereg (FuncState *fs, int reg) {
+  if (!ISK(reg) && reg >= fs->nactvar) {
+    fs->freereg--;
+    lua_assert(reg == fs->freereg);
+  }
+}
+
+
+static void freeexp (FuncState *fs, expdesc *e) {
+  if (e->k == VNONRELOC)
+    freereg(fs, e->info);
+}
+
+
+static int addk (FuncState *fs, TValue *k, TValue *v) {
+  lua_State *L = fs->L;
+  TValue *idx = luaH_set(L, fs->h, k);
+  Proto *f = fs->f;
+  int oldsize = f->sizek;
+  if (ttisnumber(idx)) {
+    lua_assert(luaO_rawequalObj(&fs->f->k[cast(int, nvalue(idx))], v));
+    return cast(int, nvalue(idx));
+  }
+  else {  /* constant not found; create a new entry */
+    setnvalue(idx, cast(lua_Number, fs->nk));
+    luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
+                    MAXARG_Bx, "constant table overflow");
+    while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
+    setobj(L, &f->k[fs->nk], v);
+    luaC_barrier(L, f, v);
+    return fs->nk++;
+  }
+}
+
+
+int luaK_stringK (FuncState *fs, TString *s) {
+  TValue o;
+  setsvalue(fs->L, &o, s);
+  return addk(fs, &o, &o);
+}
+
+
+int luaK_numberK (FuncState *fs, lua_Number r) {
+  TValue o;
+  setnvalue(&o, r);
+  return addk(fs, &o, &o);
+}
+
+
+static int boolK (FuncState *fs, int b) {
+  TValue o;
+  setbvalue(&o, b);
+  return addk(fs, &o, &o);
+}
+
+
+static int nilK (FuncState *fs) {
+  TValue k, v;
+  setnilvalue(&v);
+  /* cannot use nil as key; instead use table itself to represent nil */
+  sethvalue(fs->L, &k, fs->h);
+  return addk(fs, &k, &v);
+}
+
+
+void luaK_setreturns (FuncState *fs, expdesc *e, int nresults) {
+  if (e->k == VCALL) {  /* expression is an open function call? */
+    SETARG_C(getcode(fs, e), nresults+1);
+  }
+  else if (e->k == VVARARG) {
+    SETARG_B(getcode(fs, e), nresults+1);
+    SETARG_A(getcode(fs, e), fs->freereg);
+    luaK_reserveregs(fs, 1);
+  }
+}
+
+
+void luaK_setoneret (FuncState *fs, expdesc *e) {
+  if (e->k == VCALL) {  /* expression is an open function call? */
+    e->k = VNONRELOC;
+    e->info = GETARG_A(getcode(fs, e));
+  }
+  else if (e->k == VVARARG) {
+    SETARG_B(getcode(fs, e), 2);
+    e->k = VRELOCABLE;  /* can relocate its simple result */
+  }
+}
+
+
+void luaK_dischargevars (FuncState *fs, expdesc *e) {
+  switch (e->k) {
+    case VLOCAL: {
+      e->k = VNONRELOC;
+      break;
+    }
+    case VUPVAL: {
+      e->info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->info, 0);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VGLOBAL: {
+      e->info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->info);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VINDEXED: {
+      freereg(fs, e->aux);
+      freereg(fs, e->info);
+      e->info = luaK_codeABC(fs, OP_GETTABLE, 0, e->info, e->aux);
+      e->k = VRELOCABLE;
+      break;
+    }
+    case VVARARG:
+    case VCALL: {
+      luaK_setoneret(fs, e);
+      break;
+    }
+    default: break;  /* there is one value available (somewhere) */
+  }
+}
+
+
+static int code_label (FuncState *fs, int A, int b, int jump) {
+  luaK_getlabel(fs);  /* those instructions may be jump targets */
+  return luaK_codeABC(fs, OP_LOADBOOL, A, b, jump);
+}
+
+
+static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: {
+      luaK_nil(fs, reg, 1);
+      break;
+    }
+    case VFALSE:  case VTRUE: {
+      luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
+      break;
+    }
+    case VK: {
+      luaK_codeABx(fs, OP_LOADK, reg, e->info);
+      break;
+    }
+    case VRELOCABLE: {
+      Instruction *pc = &getcode(fs, e);
+      SETARG_A(*pc, reg);
+      break;
+    }
+    case VNONRELOC: {
+      if (reg != e->info)
+        luaK_codeABC(fs, OP_MOVE, reg, e->info, 0);
+      break;
+    }
+    default: {
+      lua_assert(e->k == VVOID || e->k == VJMP);
+      return;  /* nothing to do... */
+    }
+  }
+  e->info = reg;
+  e->k = VNONRELOC;
+}
+
+
+static void discharge2anyreg (FuncState *fs, expdesc *e) {
+  if (e->k != VNONRELOC) {
+    luaK_reserveregs(fs, 1);
+    discharge2reg(fs, e, fs->freereg-1);
+  }
+}
+
+
+static void exp2reg (FuncState *fs, expdesc *e, int reg) {
+  discharge2reg(fs, e, reg);
+  if (e->k == VJMP)
+    luaK_concat(fs, &e->t, e->info);  /* put this jump in `t' list */
+  if (hasjumps(e)) {
+    int final;  /* position after whole expression */
+    int p_f = NO_JUMP;  /* position of an eventual LOAD false */
+    int p_t = NO_JUMP;  /* position of an eventual LOAD true */
+    if (need_value(fs, e->t) || need_value(fs, e->f)) {
+      int fj = NO_JUMP;  /* first jump (over LOAD ops.) */
+      if (e->k != VJMP)
+        fj = luaK_jump(fs);
+      p_f = code_label(fs, reg, 0, 1);
+      p_t = code_label(fs, reg, 1, 0);
+      luaK_patchtohere(fs, fj);
+    }
+    final = luaK_getlabel(fs);
+    patchlistaux(fs, e->f, final, reg, p_f);
+    patchlistaux(fs, e->t, final, reg, p_t);
+  }
+  e->f = e->t = NO_JUMP;
+  e->info = reg;
+  e->k = VNONRELOC;
+}
+
+
+void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  freeexp(fs, e);
+  luaK_reserveregs(fs, 1);
+  exp2reg(fs, e, fs->freereg - 1);
+}
+
+
+int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  if (e->k == VNONRELOC) {
+    if (!hasjumps(e)) return e->info;  /* exp is already in a register */ 
+    if (e->info >= fs->nactvar) {  /* reg. is not a local? */
+      exp2reg(fs, e, e->info);  /* put value on it */
+      return e->info;
+    }
+  }
+  luaK_exp2nextreg(fs, e);  /* default */
+  return e->info;
+}
+
+
+void luaK_exp2val (FuncState *fs, expdesc *e) {
+  if (hasjumps(e))
+    luaK_exp2anyreg(fs, e);
+  else
+    luaK_dischargevars(fs, e);
+}
+
+
+int luaK_exp2RK (FuncState *fs, expdesc *e) {
+  luaK_exp2val(fs, e);
+  switch (e->k) {
+    case VTRUE:
+    case VFALSE:
+    case VNIL: {
+      if (fs->nk <= MAXINDEXRK) {  /* constant fit in RK operand? */
+        e->info = (e->k == VNIL) ? nilK(fs) : boolK(fs, (e->k == VTRUE));
+        e->k = VK;
+        return RKASK(e->info);
+      }
+      else break;
+    }
+    case VK: {
+      if (e->info <= MAXINDEXRK)  /* constant fit in argC? */
+        return RKASK(e->info);
+      else break;
+    }
+    default: break;
+  }
+  /* not a constant in the right range: put it in a register */
+  return luaK_exp2anyreg(fs, e);
+}
+
+
+void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {
+  switch (var->k) {
+    case VLOCAL: {
+      freeexp(fs, ex);
+      exp2reg(fs, ex, var->info);
+      return;
+    }
+    case VUPVAL: {
+      int e = luaK_exp2anyreg(fs, ex);
+      luaK_codeABC(fs, OP_SETUPVAL, e, var->info, 0);
+      break;
+    }
+    case VGLOBAL: {
+      int e = luaK_exp2anyreg(fs, ex);
+      luaK_codeABx(fs, OP_SETGLOBAL, e, var->info);
+      break;
+    }
+    case VINDEXED: {
+      int e = luaK_exp2RK(fs, ex);
+      luaK_codeABC(fs, OP_SETTABLE, var->info, var->aux, e);
+      break;
+    }
+    default: {
+      lua_assert(0);  /* invalid var kind to store */
+      break;
+    }
+  }
+  freeexp(fs, ex);
+}
+
+
+void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
+  int func;
+  luaK_exp2anyreg(fs, e);
+  freeexp(fs, e);
+  func = fs->freereg;
+  luaK_reserveregs(fs, 2);
+  luaK_codeABC(fs, OP_SELF, func, e->info, luaK_exp2RK(fs, key));
+  freeexp(fs, key);
+  e->info = func;
+  e->k = VNONRELOC;
+}
+
+
+static void invertjump (FuncState *fs, expdesc *e) {
+  Instruction *pc = getjumpcontrol(fs, e->info);
+  lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET &&
+                                           GET_OPCODE(*pc) != OP_TEST);
+  SETARG_A(*pc, !(GETARG_A(*pc)));
+}
+
+
+static int jumponcond (FuncState *fs, expdesc *e, int cond) {
+  if (e->k == VRELOCABLE) {
+    Instruction ie = getcode(fs, e);
+    if (GET_OPCODE(ie) == OP_NOT) {
+      fs->pc--;  /* remove previous OP_NOT */
+      return condjump(fs, OP_TEST, GETARG_B(ie), 0, !cond);
+    }
+    /* else go through */
+  }
+  discharge2anyreg(fs, e);
+  freeexp(fs, e);
+  return condjump(fs, OP_TESTSET, NO_REG, e->info, cond);
+}
+
+
+void luaK_goiftrue (FuncState *fs, expdesc *e) {
+  int pc;  /* pc of last jump */
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VK: case VTRUE: {
+      pc = NO_JUMP;  /* always true; do nothing */
+      break;
+    }
+    case VFALSE: {
+      pc = luaK_jump(fs);  /* always jump */
+      break;
+    }
+    case VJMP: {
+      invertjump(fs, e);
+      pc = e->info;
+      break;
+    }
+    default: {
+      pc = jumponcond(fs, e, 0);
+      break;
+    }
+  }
+  luaK_concat(fs, &e->f, pc);  /* insert last jump in `f' list */
+  luaK_patchtohere(fs, e->t);
+  e->t = NO_JUMP;
+}
+
+
+void luaK_goiffalse (FuncState *fs, expdesc *e) {
+  int pc;  /* pc of last jump */
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: case VFALSE: {
+      pc = NO_JUMP;  /* always false; do nothing */
+      break;
+    }
+    case VTRUE: {
+      pc = luaK_jump(fs);  /* always jump */
+      break;
+    }
+    case VJMP: {
+      pc = e->info;
+      break;
+    }
+    default: {
+      pc = jumponcond(fs, e, 1);
+      break;
+    }
+  }
+  luaK_concat(fs, &e->t, pc);  /* insert last jump in `t' list */
+  luaK_patchtohere(fs, e->f);
+  e->f = NO_JUMP;
+}
+
+
+static void codenot (FuncState *fs, expdesc *e) {
+  luaK_dischargevars(fs, e);
+  switch (e->k) {
+    case VNIL: case VFALSE: {
+      e->k = VTRUE;
+      break;
+    }
+    case VK: case VTRUE: {
+      e->k = VFALSE;
+      break;
+    }
+    case VJMP: {
+      invertjump(fs, e);
+      break;
+    }
+    case VRELOCABLE:
+    case VNONRELOC: {
+      discharge2anyreg(fs, e);
+      freeexp(fs, e);
+      e->info = luaK_codeABC(fs, OP_NOT, 0, e->info, 0);
+      e->k = VRELOCABLE;
+      break;
+    }
+    default: {
+      lua_assert(0);  /* cannot happen */
+      break;
+    }
+  }
+  /* interchange true and false lists */
+  { int temp = e->f; e->f = e->t; e->t = temp; }
+  removevalues(fs, e->f);
+  removevalues(fs, e->t);
+}
+
+
+void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
+  t->aux = luaK_exp2RK(fs, k);
+  t->k = VINDEXED;
+}
+
+
+void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) {
+  switch (op) {
+    case OPR_MINUS: {
+      luaK_exp2val(fs, e);
+      if (e->k == VK && ttisnumber(&fs->f->k[e->info]))
+        e->info = luaK_numberK(fs, luai_numunm(L, nvalue(&fs->f->k[e->info])));
+      else {
+        luaK_exp2anyreg(fs, e);
+        freeexp(fs, e);
+        e->info = luaK_codeABC(fs, OP_UNM, 0, e->info, 0);
+        e->k = VRELOCABLE;
+      }
+      break;
+    }
+    case OPR_NOT: {
+      codenot(fs, e);
+      break;
+    }
+    case OPR_LEN: {
+      luaK_exp2anyreg(fs, e);
+      freeexp(fs, e);
+      e->info = luaK_codeABC(fs, OP_LEN, 0, e->info, 0);
+      e->k = VRELOCABLE;
+      break;
+    }
+    default: lua_assert(0);
+  }
+}
+
+
+void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
+  switch (op) {
+    case OPR_AND: {
+      luaK_goiftrue(fs, v);
+      break;
+    }
+    case OPR_OR: {
+      luaK_goiffalse(fs, v);
+      break;
+    }
+    case OPR_CONCAT: {
+      luaK_exp2nextreg(fs, v);  /* operand must be on the `stack' */
+      break;
+    }
+    default: {
+      luaK_exp2RK(fs, v);
+      break;
+    }
+  }
+}
+
+
+static void codebinop (FuncState *fs, expdesc *res, BinOpr op,
+                       int o1, int o2) {
+  if (op <= OPR_POW) {  /* arithmetic operator? */
+    OpCode opc = cast(OpCode, (op - OPR_ADD) + OP_ADD);  /* ORDER OP */
+    res->info = luaK_codeABC(fs, opc, 0, o1, o2);
+    res->k = VRELOCABLE;
+  }
+  else {  /* test operator */
+    static const OpCode ops[] = {OP_EQ, OP_EQ, OP_LT, OP_LE, OP_LT, OP_LE};
+    int cond = 1;
+    if (op >= OPR_GT) {  /* `>' or `>='? */
+      int temp;  /* exchange args and replace by `<' or `<=' */
+      temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */
+    }
+    else if (op == OPR_NE) cond = 0;
+    res->info = condjump(fs, ops[op - OPR_NE], cond, o1, o2);
+    res->k = VJMP;
+  }
+}
+
+
+void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
+  switch (op) {
+    case OPR_AND: {
+      lua_assert(e1->t == NO_JUMP);  /* list must be closed */
+      luaK_dischargevars(fs, e2);
+      luaK_concat(fs, &e1->f, e2->f);
+      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->t = e2->t;
+      break;
+    }
+    case OPR_OR: {
+      lua_assert(e1->f == NO_JUMP);  /* list must be closed */
+      luaK_dischargevars(fs, e2);
+      luaK_concat(fs, &e1->t, e2->t);
+      e1->k = e2->k; e1->info = e2->info; e1->aux = e2->aux; e1->f = e2->f;
+      break;
+    }
+    case OPR_CONCAT: {
+      luaK_exp2val(fs, e2);
+      if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
+        lua_assert(e1->info == GETARG_B(getcode(fs, e2))-1);
+        freeexp(fs, e1);
+        SETARG_B(getcode(fs, e2), e1->info);
+        e1->k = e2->k; e1->info = e2->info;
+      }
+      else {
+        luaK_exp2nextreg(fs, e2);
+        freeexp(fs, e2);
+        freeexp(fs, e1);
+        e1->info = luaK_codeABC(fs, OP_CONCAT, 0, e1->info, e2->info);
+        e1->k = VRELOCABLE;
+      }
+      break;
+    }
+    default: {
+      int o1 = luaK_exp2RK(fs, e1);
+      int o2 = luaK_exp2RK(fs, e2);
+      freeexp(fs, e2);
+      freeexp(fs, e1);
+      codebinop(fs, e1, op, o1, o2);
+    }
+  }
+}
+
+
+void luaK_fixline (FuncState *fs, int line) {
+  fs->f->lineinfo[fs->pc - 1] = line;
+}
+
+
+int luaK_code (FuncState *fs, Instruction i, int line) {
+  Proto *f = fs->f;
+  dischargejpc(fs);  /* `pc' will change */
+  /* put new instruction in code array */
+  luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
+                  MAX_INT, "code size overflow");
+  f->code[fs->pc] = i;
+  /* save corresponding line information */
+  luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
+                  MAX_INT, "code size overflow");
+  f->lineinfo[fs->pc] = line;
+  return fs->pc++;
+}
+
+
+int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
+  lua_assert(getOpMode(o) == iABC);
+  lua_assert(getBMode(o) != OpArgN || b == 0);
+  lua_assert(getCMode(o) != OpArgN || c == 0);
+  return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
+}
+
+
+int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
+  lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
+  lua_assert(getCMode(o) == OpArgN);
+  return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
+}
+
+
+void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) {
+  int c =  (nelems - 1)/LFIELDS_PER_FLUSH + 1;
+  int b = (tostore == LUA_MULTRET) ? 0 : tostore;
+  lua_assert(tostore != 0);
+  if (c <= MAXARG_C)
+    luaK_codeABC(fs, OP_SETLIST, base, b, c);
+  else {
+    luaK_codeABC(fs, OP_SETLIST, base, b, 0);
+    luaK_code(fs, cast(Instruction, c), fs->ls->lastline);
+  }
+  fs->freereg = base + 1;  /* free registers with list values */
+}
+

lcode.h

@@ -0,0 +1,79 @@
+/*
+** $Id: lcode.h,v 1.44 2005/05/20 15:53:42 roberto Exp $
+** Code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lcode_h
+#define lcode_h
+
+#include "llex.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+
+
+/*
+** Marks the end of a patch list. It is an invalid value both as an absolute
+** address, and as a list link (would link an element to itself).
+*/
+#define NO_JUMP (-1)
+
+
+/*
+** grep "ORDER OPR" if you change these enums
+*/
+typedef enum BinOpr {
+  OPR_ADD, OPR_SUB, OPR_MULT, OPR_DIV, OPR_MOD, OPR_POW,
+  OPR_CONCAT,
+  OPR_NE, OPR_EQ,
+  OPR_LT, OPR_LE, OPR_GT, OPR_GE,
+  OPR_AND, OPR_OR,
+  OPR_NOBINOPR
+} BinOpr;
+
+#define binopistest(op)	((op) >= OPR_NE)
+
+typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
+
+
+#define getcode(fs,e)	((fs)->f->code[(e)->info])
+
+#define luaK_codeAsBx(fs,o,A,sBx)	luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
+
+#define luaK_setmultret(fs,e)	luaK_setreturns(fs, e, LUA_MULTRET)
+
+LUAI_FUNC int luaK_code (FuncState *fs, Instruction i, int line);
+LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
+LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
+LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
+LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
+LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
+LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
+LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
+LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r);
+LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
+LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e);
+LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
+LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
+LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_goiffalse (FuncState *fs, expdesc *e);
+LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
+LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
+LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
+LUAI_FUNC int luaK_jump (FuncState *fs);
+LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
+LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
+LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
+LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
+LUAI_FUNC int luaK_getlabel (FuncState *fs);
+LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v);
+LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
+LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2);
+LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
+
+
+#endif

ldblib.c

@@ -0,0 +1,390 @@
+/*
+** $Id: ldblib.c,v 1.100 2005/08/15 14:12:32 roberto Exp roberto $
+** Interface from Lua to its debug API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldblib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+static int db_getmetatable (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (!lua_getmetatable(L, 1)) {
+    lua_pushnil(L);  /* no metatable */
+  }
+  return 1;
+}
+
+
+static int db_setmetatable (lua_State *L) {
+  int t = lua_type(L, 2);
+  luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
+                    "nil or table expected");
+  lua_settop(L, 2);
+  lua_pushboolean(L, lua_setmetatable(L, 1));
+  return 1;
+}
+
+
+static int db_getfenv (lua_State *L) {
+  lua_getfenv(L, 1);
+  return 1;
+}
+
+
+static int db_setfenv (lua_State *L) {
+  luaL_checktype(L, 2, LUA_TTABLE);
+  lua_settop(L, 2);
+  if (lua_setfenv(L, 1) == 0)
+    luaL_error(L, LUA_QL("setfenv")
+                  " cannot change environment of given object");
+  return 1;
+}
+
+
+static void settabss (lua_State *L, const char *i, const char *v) {
+  lua_pushstring(L, v);
+  lua_setfield(L, -2, i);
+}
+
+
+static void settabsi (lua_State *L, const char *i, int v) {
+  lua_pushinteger(L, v);
+  lua_setfield(L, -2, i);
+}
+
+
+static lua_State *getthread (lua_State *L, int *arg) {
+  if (lua_isthread(L, 1)) {
+    *arg = 1;
+    return lua_tothread(L, 1);
+  }
+  else {
+    *arg = 0;
+    return L;
+  }
+}
+
+
+static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
+  if (L == L1) {
+    lua_pushvalue(L, -2);
+    lua_remove(L, -3);
+  }
+  else
+    lua_xmove(L1, L, 1);
+  lua_setfield(L, -2, fname);
+}
+
+
+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, "flnSu");
+  if (lua_isnumber(L, arg+1)) {
+    if (!lua_getstack(L1, (int)lua_tointeger(L, arg+1), &ar)) {
+      lua_pushnil(L);  /* level out of range */
+      return 1;
+    }
+  }
+  else if (lua_isfunction(L, arg+1)) {
+    lua_pushfstring(L, ">%s", options);
+    options = lua_tostring(L, -1);
+    lua_pushvalue(L, arg+1);
+    lua_xmove(L, L1, 1);
+  }
+  else
+    return luaL_argerror(L, arg+1, "function or level expected");
+  if (!lua_getinfo(L1, options, &ar))
+    return luaL_argerror(L, arg+2, "invalid option");
+  lua_newtable(L);
+  if (strchr(options, 'S')) {
+    settabss(L, "source", ar.source);
+    settabss(L, "short_src", ar.short_src);
+    settabsi(L, "linedefined", ar.linedefined);
+    settabsi(L, "lastlinedefined", ar.lastlinedefined);
+    settabss(L, "what", ar.what);
+  }
+  if (strchr(options, 'l'))
+    settabsi(L, "currentline", ar.currentline);
+  if (strchr(options, 'u'))
+    settabsi(L, "nups", ar.nups);
+  if (strchr(options, 'n')) {
+    settabss(L, "name", ar.name);
+    settabss(L, "namewhat", ar.namewhat);
+  }
+  if (strchr(options, 'L'))
+    treatstackoption(L, L1, "activelines");
+  if (strchr(options, 'f'))
+    treatstackoption(L, L1, "func");
+  return 1;  /* return table */
+}
+    
+
+static int db_getlocal (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  lua_Debug ar;
+  const char *name;
+  if (!lua_getstack(L1, luaL_checkint(L, arg+1), &ar))  /* out of range? */
+    return luaL_argerror(L, arg+1, "level out of range");
+  name = lua_getlocal(L1, &ar, luaL_checkint(L, arg+2));
+  if (name) {
+    lua_xmove(L1, L, 1);
+    lua_pushstring(L, name);
+    lua_pushvalue(L, -2);
+    return 2;
+  }
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+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? */
+    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)));
+  return 1;
+}
+
+
+static int auxupvalue (lua_State *L, int get) {
+  const char *name;
+  int n = luaL_checkint(L, 2);
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  if (lua_iscfunction(L, 1)) return 0;  /* cannot touch C upvalues from Lua */
+  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));
+  return get + 1;
+}
+
+
+static int db_getupvalue (lua_State *L) {
+  return auxupvalue(L, 1);
+}
+
+
+static int db_setupvalue (lua_State *L) {
+  luaL_checkany(L, 3);
+  return auxupvalue(L, 0);
+}
+
+
+
+static const char KEY_HOOK = 'h';
+
+
+static void hookf (lua_State *L, lua_Debug *ar) {
+  static const char *const hooknames[] =
+    {"call", "return", "line", "count", "tail return"};
+  lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+  lua_pushlightuserdata(L, L);
+  lua_rawget(L, -2);
+  if (lua_isfunction(L, -1)) {
+    lua_pushstring(L, hooknames[(int)ar->event]);
+    if (ar->currentline >= 0)
+      lua_pushinteger(L, ar->currentline);
+    else lua_pushnil(L);
+    lua_assert(lua_getinfo(L, "lS", ar));
+    lua_call(L, 2, 0);
+  }
+}
+
+
+static int makemask (const char *smask, int count) {
+  int mask = 0;
+  if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
+  if (strchr(smask, 'r')) mask |= LUA_MASKRET;
+  if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
+  if (count > 0) mask |= LUA_MASKCOUNT;
+  return mask;
+}
+
+
+static char *unmakemask (int mask, char *smask) {
+  int i = 0;
+  if (mask & LUA_MASKCALL) smask[i++] = 'c';
+  if (mask & LUA_MASKRET) smask[i++] = 'r';
+  if (mask & LUA_MASKLINE) smask[i++] = 'l';
+  smask[i] = '\0';
+  return smask;
+}
+
+
+static void gethooktable (lua_State *L) {
+  lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+  lua_rawget(L, LUA_REGISTRYINDEX);
+  if (!lua_istable(L, -1)) {
+    lua_pop(L, 1);
+    lua_newtable(L);
+    lua_pushlightuserdata(L, (void *)&KEY_HOOK);
+    lua_pushvalue(L, -2);
+    lua_rawset(L, LUA_REGISTRYINDEX);
+  }
+}
+
+
+static int db_sethook (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  if (lua_isnoneornil(L, arg+1)) {
+    lua_settop(L, arg+1);
+    lua_sethook(L1, NULL, 0, 0);  /* turn off hooks */
+  }
+  else {
+    const char *smask = luaL_checkstring(L, arg+2);
+    int count = luaL_optint(L, arg+3, 0);
+    luaL_checktype(L, arg+1, LUA_TFUNCTION);
+    lua_sethook(L1, hookf, makemask(smask, count), count);
+  }
+  gethooktable(L1);
+  lua_pushlightuserdata(L1, L1);
+  lua_pushvalue(L, arg+1);
+  lua_xmove(L, L1, 1);
+  lua_rawset(L1, -3);  /* set new hook */
+  lua_pop(L1, 1);  /* remove hook table */
+  return 0;
+}
+
+
+static int db_gethook (lua_State *L) {
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  char buff[5];
+  int mask = lua_gethookmask(L1);
+  lua_Hook hook = lua_gethook(L1);
+  if (hook != NULL && hook != hookf)  /* external hook? */
+    lua_pushliteral(L, "external hook");
+  else {
+    gethooktable(L1);
+    lua_pushlightuserdata(L1, L1);
+    lua_rawget(L1, -2);   /* get hook */
+    lua_remove(L1, -2);  /* remove hook table */
+    lua_xmove(L1, L, 1);
+  }
+  lua_pushstring(L, unmakemask(mask, buff));
+  lua_pushinteger(L, lua_gethookcount(L1));
+  return 3;
+}
+
+
+static int db_debug (lua_State *L) {
+  for (;;) {
+    char buffer[250];
+    fputs("lua_debug> ", stderr);
+    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
+        strcmp(buffer, "cont\n") == 0)
+      return 0;
+    if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
+        lua_pcall(L, 0, 0, 0)) {
+      fputs(lua_tostring(L, -1), stderr);
+      fputs("\n", stderr);
+    }
+    lua_settop(L, 0);  /* remove eventual returns */
+  }
+}
+
+
+#define LEVELS1	12	/* size of the first part of the stack */
+#define LEVELS2	10	/* size of the second part of the stack */
+
+static int db_errorfb (lua_State *L) {
+  int level;
+  int firstpart = 1;  /* still before eventual `...' */
+  int arg;
+  lua_State *L1 = getthread(L, &arg);
+  lua_Debug ar;
+  if (lua_isnumber(L, arg+2)) {
+    level = lua_tointeger(L, arg+2);
+    lua_pop(L, 1);
+  }
+  else
+    level = (L == L1) ? 1 : 0;  /* level 0 may be this own function */
+  if (lua_gettop(L) == arg)
+    lua_pushliteral(L, "");
+  else if (!lua_isstring(L, arg+1)) return 1;  /* message is not a string */
+  else lua_pushliteral(L, "\n");
+  lua_pushliteral(L, "stack traceback:");
+  while (lua_getstack(L1, level++, &ar)) {
+    if (level > LEVELS1 && firstpart) {
+      /* no more than `LEVELS2' more levels? */
+      if (!lua_getstack(L1, level+LEVELS2, &ar))
+        level--;  /* keep going */
+      else {
+        lua_pushliteral(L, "\n\t...");  /* too many levels */
+        while (lua_getstack(L1, level+LEVELS2, &ar))  /* find last levels */
+          level++;
+      }
+      firstpart = 0;
+      continue;
+    }
+    lua_pushliteral(L, "\n\t");
+    lua_getinfo(L1, "Snl", &ar);
+    lua_pushfstring(L, "%s:", ar.short_src);
+    if (ar.currentline > 0)
+      lua_pushfstring(L, "%d:", ar.currentline);
+    if (*ar.namewhat != '\0')  /* is there a name? */
+        lua_pushfstring(L, " in function " LUA_QS, ar.name);
+    else {
+      if (*ar.what == 'm')  /* main? */
+        lua_pushfstring(L, " in main chunk");
+      else if (*ar.what == 'C' || *ar.what == 't')
+        lua_pushliteral(L, " ?");  /* C function or tail call */
+      else
+        lua_pushfstring(L, " in function <%s:%d>",
+                           ar.short_src, ar.linedefined);
+    }
+    lua_concat(L, lua_gettop(L) - arg);
+  }
+  lua_concat(L, lua_gettop(L) - arg);
+  return 1;
+}
+
+
+static const luaL_Reg dblib[] = {
+  {"debug", db_debug},
+  {"getfenv", db_getfenv},
+  {"gethook", db_gethook},
+  {"getinfo", db_getinfo},
+  {"getlocal", db_getlocal},
+  {"getmetatable", db_getmetatable},
+  {"getupvalue", db_getupvalue},
+  {"setfenv", db_setfenv},
+  {"sethook", db_sethook},
+  {"setlocal", db_setlocal},
+  {"setmetatable", db_setmetatable},
+  {"setupvalue", db_setupvalue},
+  {"traceback", db_errorfb},
+  {NULL, NULL}
+};
+
+
+LUALIB_API int luaopen_debug (lua_State *L) {
+  luaL_register(L, LUA_DBLIBNAME, dblib);
+  return 1;
+}
+

ldebug.c

@@ -0,0 +1,621 @@
+/*
+** $Id: ldebug.c,v 2.25 2005/07/11 13:59:03 roberto Exp roberto $
+** Debug Interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <string.h>
+
+
+#define ldebug_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lapi.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
+
+
+static int currentpc (lua_State *L, CallInfo *ci) {
+  if (!isLua(ci)) return -1;  /* function is not a Lua function? */
+  if (ci == L->ci)
+    ci->savedpc = L->savedpc;
+  return pcRel(ci->savedpc, ci_func(ci)->l.p);
+}
+
+
+static int currentline (lua_State *L, CallInfo *ci) {
+  int pc = currentpc(L, ci);
+  if (pc < 0)
+    return -1;  /* only active lua functions have current-line information */
+  else
+    return getline(ci_func(ci)->l.p, pc);
+}
+
+
+/*
+** 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) {
+  if (func == NULL || mask == 0) {  /* turn off hooks? */
+    mask = 0;
+    func = NULL;
+  }
+  L->hook = func;
+  L->basehookcount = count;
+  resethookcount(L);
+  L->hookmask = cast(lu_byte, mask);
+  return 1;
+}
+
+
+LUA_API lua_Hook lua_gethook (lua_State *L) {
+  return L->hook;
+}
+
+
+LUA_API int lua_gethookmask (lua_State *L) {
+  return L->hookmask;
+}
+
+
+LUA_API int lua_gethookcount (lua_State *L) {
+  return L->basehookcount;
+}
+
+
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
+  int status;
+  CallInfo *ci;
+  lua_lock(L);
+  for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) {
+    level--;
+    if (f_isLua(ci))  /* Lua function? */
+      level -= ci->tailcalls;  /* skip lost tail calls */
+  }
+  if (level == 0 && ci > L->base_ci) {  /* level found? */
+    status = 1;
+    ar->i_ci = cast(int, ci - L->base_ci);
+  }
+  else if (level < 0) {  /* level is of a lost tail call? */
+    status = 1;
+    ar->i_ci = 0;
+  }
+  else status = 0;  /* no such level */
+  lua_unlock(L);
+  return status;
+}
+
+
+static Proto *getluaproto (CallInfo *ci) {
+  return (isLua(ci) ? ci_func(ci)->l.p : NULL);
+}
+
+
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
+  CallInfo *ci;
+  Proto *fp;
+  lua_lock(L);
+  name = NULL;
+  ci = L->base_ci + ar->i_ci;
+  fp = getluaproto(ci);
+  if (fp) {  /* is a Lua function? */
+    name = luaF_getlocalname(fp, n, currentpc(L, ci));
+    if (name)
+      luaA_pushobject(L, ci->base+(n-1));  /* push value */
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
+  CallInfo *ci;
+  Proto *fp;
+  lua_lock(L);
+  name = NULL;
+  ci = L->base_ci + ar->i_ci;
+  fp = getluaproto(ci);
+  L->top--;  /* pop new value */
+  if (fp) {  /* is a Lua function? */
+    name = luaF_getlocalname(fp, n, currentpc(L, ci));
+    if (!name || name[0] == '(')  /* `(' starts private locals */
+      name = NULL;
+    else
+      setobjs2s(L, ci->base+(n-1), L->top);
+  }
+  lua_unlock(L);
+  return name;
+}
+
+
+static void funcinfo (lua_Debug *ar, Closure *cl) {
+  if (cl->c.isC) {
+    ar->source = "=[C]";
+    ar->linedefined = -1;
+    ar->lastlinedefined = -1;
+    ar->what = "C";
+  }
+  else {
+    ar->source = getstr(cl->l.p->source);
+    ar->linedefined = cl->l.p->linedefined;
+    ar->lastlinedefined = cl->l.p->lastlinedefined;
+    ar->what = (ar->linedefined == 0) ? "main" : "Lua";
+  }
+  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+}
+
+
+static void info_tailcall (lua_Debug *ar) {
+  ar->name = ar->namewhat = "";
+  ar->what = "tail";
+  ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
+  ar->source = "=(tail call)";
+  luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
+  ar->nups = 0;
+}
+
+
+static void collectvalidlines (lua_State *L, Closure *f) {
+  if (f == NULL || f->c.isC) {
+    setnilvalue(L->top);
+  }
+  else {
+    Table *t = luaH_new(L, 0, 0);
+    int *lineinfo = f->l.p->lineinfo;
+    int i;
+    for (i=0; i<f->l.p->sizelineinfo; i++)
+      setbvalue(luaH_setnum(L, t, lineinfo[i]), 1);
+    sethvalue(L, L->top, t); 
+  }
+  incr_top(L);
+}
+
+
+static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
+                    Closure *f, CallInfo *ci) {
+  int status = 1;
+  if (f == NULL) {
+    info_tailcall(ar);
+    return status;
+  }
+  for (; *what; what++) {
+    switch (*what) {
+      case 'S': {
+        funcinfo(ar, f);
+        break;
+      }
+      case 'l': {
+        ar->currentline = (ci) ? currentline(L, ci) : -1;
+        break;
+      }
+      case 'u': {
+        ar->nups = f->c.nupvalues;
+        break;
+      }
+      case 'n': {
+        ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL;
+        if (ar->namewhat == NULL) {
+          ar->namewhat = "";  /* not found */
+          ar->name = NULL;
+        }
+        break;
+      }
+      case 'L':
+      case 'f':  /* handled by lua_getinfo */
+        break;
+      default: status = 0;  /* invalid option */
+    }
+  }
+  return status;
+}
+
+
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
+  int status;
+  Closure *f = NULL;
+  CallInfo *ci = NULL;
+  lua_lock(L);
+  if (*what == '>') {
+    StkId func = L->top - 1;
+    luai_apicheck(L, ttisfunction(func));
+    what++;  /* skip the '>' */
+    f = clvalue(func);
+    L->top--;  /* pop function */
+  }
+  else if (ar->i_ci != 0) {  /* no tail call? */
+    ci = L->base_ci + ar->i_ci;
+    lua_assert(ttisfunction(ci->func));
+    f = clvalue(ci->func);
+  }
+  status = auxgetinfo(L, what, ar, f, ci);
+  if (strchr(what, 'f')) {
+    if (f == NULL) setnilvalue(L->top);
+    else setclvalue(L, L->top, f);
+    incr_top(L);
+  }
+  if (strchr(what, 'L'))
+    collectvalidlines(L, f);
+  lua_unlock(L);
+  return status;
+}
+
+
+/*
+** {======================================================
+** Symbolic Execution and code checker
+** =======================================================
+*/
+
+#define check(x)		if (!(x)) return 0;
+
+#define checkjump(pt,pc)	check(0 <= pc && pc < pt->sizecode)
+
+#define checkreg(pt,reg)	check((reg) < (pt)->maxstacksize)
+
+
+
+static int precheck (const Proto *pt) {
+  check(pt->maxstacksize <= MAXSTACK);
+  lua_assert(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize);
+  lua_assert(!(pt->is_vararg & VARARG_NEEDSARG) ||
+              (pt->is_vararg & VARARG_HASARG));
+  check(pt->sizeupvalues <= pt->nups);
+  check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0);
+  check(GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN);
+  return 1;
+}
+
+
+#define checkopenop(pt,pc)	luaG_checkopenop((pt)->code[(pc)+1])
+
+int luaG_checkopenop (Instruction i) {
+  switch (GET_OPCODE(i)) {
+    case OP_CALL:
+    case OP_TAILCALL:
+    case OP_RETURN:
+    case OP_SETLIST: {
+      check(GETARG_B(i) == 0);
+      return 1;
+    }
+    default: return 0;  /* invalid instruction after an open call */
+  }
+}
+
+
+static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) {
+  switch (mode) {
+    case OpArgN: check(r == 0); break;
+    case OpArgU: break;
+    case OpArgR: checkreg(pt, r); break;
+    case OpArgK:
+      check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
+      break;
+  }
+  return 1;
+}
+
+
+static Instruction symbexec (const Proto *pt, int lastpc, int reg) {
+  int pc;
+  int last;  /* stores position of last instruction that changed `reg' */
+  last = pt->sizecode-1;  /* points to final return (a `neutral' instruction) */
+  check(precheck(pt));
+  for (pc = 0; pc < lastpc; pc++) {
+    const Instruction i = pt->code[pc];
+    OpCode op = GET_OPCODE(i);
+    int a = GETARG_A(i);
+    int b = 0;
+    int c = 0;
+    check(op < NUM_OPCODES);
+    checkreg(pt, a);
+    switch (getOpMode(op)) {
+      case iABC: {
+        b = GETARG_B(i);
+        c = GETARG_C(i);
+        check(checkArgMode(pt, b, getBMode(op)));
+        check(checkArgMode(pt, c, getCMode(op)));
+        break;
+      }
+      case iABx: {
+        b = GETARG_Bx(i);
+        if (getBMode(op) == OpArgK) check(b < pt->sizek);
+        break;
+      }
+      case iAsBx: {
+        b = GETARG_sBx(i);
+        if (getBMode(op) == OpArgR) {
+          int dest = pc+1+b;
+          check(0 <= dest && dest < pt->sizecode);
+          if (dest > 0) {
+            /* cannot jump to a setlist count */
+            const Instruction d = pt->code[dest-1];
+            check(!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0));
+          }
+        }
+        break;
+      }
+    }
+    if (testAMode(op)) {
+      if (a == reg) last = pc;  /* change register `a' */
+    }
+    if (testTMode(op)) {
+      check(pc+2 < pt->sizecode);  /* check skip */
+      check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
+    }
+    switch (op) {
+      case OP_LOADBOOL: {
+        check(c == 0 || pc+2 < pt->sizecode);  /* check its jump */
+        break;
+      }
+      case OP_LOADNIL: {
+        if (a <= reg && reg <= b)
+          last = pc;  /* set registers from `a' to `b' */
+        break;
+      }
+      case OP_GETUPVAL:
+      case OP_SETUPVAL: {
+        check(b < pt->nups);
+        break;
+      }
+      case OP_GETGLOBAL:
+      case OP_SETGLOBAL: {
+        check(ttisstring(&pt->k[b]));
+        break;
+      }
+      case OP_SELF: {
+        checkreg(pt, a+1);
+        if (reg == a+1) last = pc;
+        break;
+      }
+      case OP_CONCAT: {
+        check(b < c);  /* at least two operands */
+        break;
+      }
+      case OP_TFORLOOP: {
+        check(c >= 1);  /* at least one result (control variable) */
+        checkreg(pt, a+2+c);  /* space for results */
+        if (reg >= a+2) last = pc;  /* affect all regs above its base */
+        break;
+      }
+      case OP_FORLOOP:
+      case OP_FORPREP:
+        checkreg(pt, a+3);
+        /* go through */
+      case OP_JMP: {
+        int dest = pc+1+b;
+        /* not full check and jump is forward and do not skip `lastpc'? */
+        if (reg != NO_REG && pc < dest && dest <= lastpc)
+          pc += b;  /* do the jump */
+        break;
+      }
+      case OP_CALL:
+      case OP_TAILCALL: {
+        if (b != 0) {
+          checkreg(pt, a+b-1);
+        }
+        c--;  /* c = num. returns */
+        if (c == LUA_MULTRET) {
+          check(checkopenop(pt, pc));
+        }
+        else if (c != 0)
+          checkreg(pt, a+c-1);
+        if (reg >= a) last = pc;  /* affect all registers above base */
+        break;
+      }
+      case OP_RETURN: {
+        b--;  /* b = num. returns */
+        if (b > 0) checkreg(pt, a+b-1);
+        break;
+      }
+      case OP_SETLIST: {
+        if (b > 0) checkreg(pt, a + b);
+        if (c == 0) pc++;
+        break;
+      }
+      case OP_CLOSURE: {
+        int nup;
+        check(b < pt->sizep);
+        nup = pt->p[b]->nups;
+        check(pc + nup < pt->sizecode);
+        for (; nup>0; nup--) {
+          OpCode op1 = GET_OPCODE(pt->code[pc+nup]);
+          check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
+        }
+        break;
+      }
+      case OP_VARARG: {
+        check((pt->is_vararg & VARARG_ISVARARG) &&
+             !(pt->is_vararg & VARARG_NEEDSARG));
+        b--;
+        if (b == LUA_MULTRET) check(checkopenop(pt, pc));
+        checkreg(pt, a+b-1);
+        break;
+      }
+      default: break;
+    }
+  }
+  return pt->code[last];
+}
+
+#undef check
+#undef checkjump
+#undef checkreg
+
+/* }====================================================== */
+
+
+int luaG_checkcode (const Proto *pt) {
+  return (symbexec(pt, pt->sizecode, NO_REG) != 0);
+}
+
+
+static const char *kname (Proto *p, int c) {
+  if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
+    return svalue(&p->k[INDEXK(c)]);
+  else
+    return "?";
+}
+
+
+static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
+                               const char **name) {
+  if (isLua(ci)) {  /* a Lua function? */
+    Proto *p = ci_func(ci)->l.p;
+    int pc = currentpc(L, ci);
+    Instruction i;
+    *name = luaF_getlocalname(p, stackpos+1, pc);
+    if (*name)  /* is a local? */
+      return "local";
+    i = symbexec(p, pc, stackpos);  /* try symbolic execution */
+    lua_assert(pc != -1);
+    switch (GET_OPCODE(i)) {
+      case OP_GETGLOBAL: {
+        int g = GETARG_Bx(i);  /* global index */
+        lua_assert(ttisstring(&p->k[g]));
+        *name = svalue(&p->k[g]);
+        return "global";
+      }
+      case OP_MOVE: {
+        int a = GETARG_A(i);
+        int b = GETARG_B(i);  /* move from `b' to `a' */
+        if (b < a)
+          return getobjname(L, ci, b, name);  /* get name for `b' */
+        break;
+      }
+      case OP_GETTABLE: {
+        int k = GETARG_C(i);  /* key index */
+        *name = kname(p, k);
+        return "field";
+      }
+      case OP_GETUPVAL: {
+        int u = GETARG_B(i);  /* upvalue index */
+        *name = p->upvalues ? getstr(p->upvalues[u]) : "?";
+        return "upvalue";
+      }
+      case OP_SELF: {
+        int k = GETARG_C(i);  /* key index */
+        *name = kname(p, k);
+        return "method";
+      }
+      default: break;
+    }
+  }
+  return NULL;  /* no useful name found */
+}
+
+
+static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
+  Instruction i;
+  if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1))
+    return NULL;  /* calling function is not Lua (or is unknown) */
+  ci--;  /* calling function */
+  i = ci_func(ci)->l.p->code[currentpc(L, ci)];
+  if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL ||
+      GET_OPCODE(i) == OP_TFORLOOP)
+    return getobjname(L, ci, GETARG_A(i), name);
+  else
+    return NULL;  /* no useful name can be found */
+}
+
+
+/* only ANSI way to check whether a pointer points to an array */
+static int isinstack (CallInfo *ci, const TValue *o) {
+  StkId p;
+  for (p = ci->base; p < ci->top; p++)
+    if (o == p) return 1;
+  return 0;
+}
+
+
+void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
+  const char *name = NULL;
+  const char *t = luaT_typenames[ttype(o)];
+  const char *kind = (isinstack(L->ci, o)) ?
+                         getobjname(L, L->ci, cast(int, o - L->base), &name) :
+                         NULL;
+  if (kind)
+    luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
+                op, kind, name, t);
+  else
+    luaG_runerror(L, "attempt to %s a %s value", op, t);
+}
+
+
+void luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
+  if (ttisstring(p1)) p1 = p2;
+  lua_assert(!ttisstring(p1));
+  luaG_typeerror(L, p1, "concatenate");
+}
+
+
+void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
+  TValue temp;
+  if (luaV_tonumber(p1, &temp) == NULL)
+    p2 = p1;  /* first operand is wrong */
+  luaG_typeerror(L, p2, "perform arithmetic on");
+}
+
+
+int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
+  const char *t1 = luaT_typenames[ttype(p1)];
+  const char *t2 = luaT_typenames[ttype(p2)];
+  if (t1[2] == t2[2])
+    luaG_runerror(L, "attempt to compare two %s values", t1);
+  else
+    luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
+  return 0;
+}
+
+
+static void addinfo (lua_State *L, const char *msg) {
+  CallInfo *ci = L->ci;
+  if (isLua(ci)) {  /* is Lua code? */
+    char buff[LUA_IDSIZE];  /* add file:line information */
+    int line = currentline(L, ci);
+    luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE);
+    luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
+  }
+}
+
+
+void luaG_errormsg (lua_State *L) {
+  if (L->errfunc != 0) {  /* is there an error handling function? */
+    StkId errfunc = restorestack(L, L->errfunc);
+    if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
+    setobjs2s(L, L->top, L->top - 1);  /* move argument */
+    setobjs2s(L, L->top - 1, errfunc);  /* push function */
+    incr_top(L);
+    luaD_call(L, L->top - 2, 1);  /* call it */
+  }
+  luaD_throw(L, LUA_ERRRUN);
+}
+
+
+void luaG_runerror (lua_State *L, const char *fmt, ...) {
+  va_list argp;
+  va_start(argp, fmt);
+  addinfo(L, luaO_pushvfstring(L, fmt, argp));
+  va_end(argp);
+  luaG_errormsg(L);
+}
+

ldebug.h

@@ -0,0 +1,33 @@
+/*
+** $Id: ldebug.h,v 2.2 2004/06/02 19:07:55 roberto Exp roberto $
+** Auxiliary functions from Debug Interface module
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ldebug_h
+#define ldebug_h
+
+
+#include "lstate.h"
+
+
+#define pcRel(pc, p)	(cast(int, (pc) - (p)->code) - 1)
+
+#define getline(f,pc)	(((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
+
+#define resethookcount(L)	(L->hookcount = L->basehookcount)
+
+
+LUAI_FUNC void luaG_typeerror (lua_State *L, const TValue *o,
+                                             const char *opname);
+LUAI_FUNC void luaG_concaterror (lua_State *L, StkId p1, StkId p2);
+LUAI_FUNC void luaG_aritherror (lua_State *L, const TValue *p1,
+                                              const TValue *p2);
+LUAI_FUNC int luaG_ordererror (lua_State *L, const TValue *p1,
+                                             const TValue *p2);
+LUAI_FUNC void luaG_runerror (lua_State *L, const char *fmt, ...);
+LUAI_FUNC void luaG_errormsg (lua_State *L);
+LUAI_FUNC int luaG_checkcode (const Proto *pt);
+LUAI_FUNC int luaG_checkopenop (Instruction i);
+
+#endif

ldo.c

@@ -0,0 +1,514 @@
+/*
+** $Id: ldo.c,v 2.32 2005/08/24 16:15:49 roberto Exp roberto $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <setjmp.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ldo_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lundump.h"
+#include "lvm.h"
+#include "lzio.h"
+
+
+
+
+/*
+** {======================================================
+** Error-recovery functions
+** =======================================================
+*/
+
+
+/* chain list of long jump buffers */
+struct lua_longjmp {
+  struct lua_longjmp *previous;
+  luai_jmpbuf b;
+  volatile int status;  /* error code */
+};
+
+
+void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop) {
+  switch (errcode) {
+    case LUA_ERRMEM: {
+      setsvalue2s(L, oldtop, luaS_newliteral(L, MEMERRMSG));
+      break;
+    }
+    case LUA_ERRERR: {
+      setsvalue2s(L, oldtop, luaS_newliteral(L, "error in error handling"));
+      break;
+    }
+    case LUA_ERRSYNTAX:
+    case LUA_ERRRUN: {
+      setobjs2s(L, oldtop, L->top - 1);  /* error message on current top */
+      break;
+    }
+  }
+  L->top = oldtop + 1;
+}
+
+
+static void restore_stack_limit (lua_State *L) {
+  lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1);
+  if (L->size_ci > LUAI_MAXCALLS) {  /* there was an overflow? */
+    int inuse = cast(int, L->ci - L->base_ci);
+    if (inuse + 1 < LUAI_MAXCALLS)  /* can `undo' overflow? */
+      luaD_reallocCI(L, LUAI_MAXCALLS);
+  }
+}
+
+
+static void resetstack (lua_State *L, int status) {
+  L->ci = L->base_ci;
+  L->base = L->ci->base;
+  luaF_close(L, L->base);  /* close eventual pending closures */
+  luaD_seterrorobj(L, status, L->base);
+  L->nCcalls = 0;
+  L->allowhook = 1;
+  restore_stack_limit(L);
+  L->errfunc = 0;
+  L->errorJmp = NULL;
+}
+
+
+void luaD_throw (lua_State *L, int errcode) {
+  if (L->errorJmp) {
+    L->errorJmp->status = errcode;
+    LUAI_THROW(L, L->errorJmp);
+  }
+  else {
+    L->status = cast(lu_byte, errcode);
+    if (G(L)->panic) {
+      resetstack(L, errcode);
+      lua_unlock(L);
+      G(L)->panic(L);
+    }
+    exit(EXIT_FAILURE);
+  }
+}
+
+
+int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
+  struct lua_longjmp lj;
+  lj.status = 0;
+  lj.previous = L->errorJmp;  /* chain new error handler */
+  L->errorJmp = &lj;
+  LUAI_TRY(L, &lj,
+    (*f)(L, ud);
+  );
+  L->errorJmp = lj.previous;  /* restore old error handler */
+  return lj.status;
+}
+
+/* }====================================================== */
+
+
+static void correctstack (lua_State *L, TValue *oldstack) {
+  CallInfo *ci;
+  GCObject *up;
+  L->top = (L->top - oldstack) + L->stack;
+  for (up = L->openupval; up != NULL; up = up->gch.next)
+    gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack;
+  for (ci = L->base_ci; ci <= L->ci; ci++) {
+    ci->top = (ci->top - oldstack) + L->stack;
+    ci->base = (ci->base - oldstack) + L->stack;
+    ci->func = (ci->func - oldstack) + L->stack;
+  }
+  L->base = (L->base - oldstack) + L->stack;
+}
+
+
+void luaD_reallocstack (lua_State *L, int newsize) {
+  TValue *oldstack = L->stack;
+  int realsize = newsize + 1 + EXTRA_STACK;
+  lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1);
+  luaM_reallocvector(L, L->stack, L->stacksize, realsize, TValue);
+  L->stacksize = realsize;
+  L->stack_last = L->stack+newsize;
+  correctstack(L, oldstack);
+}
+
+
+void luaD_reallocCI (lua_State *L, int newsize) {
+  CallInfo *oldci = L->base_ci;
+  luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
+  L->size_ci = newsize;
+  L->ci = (L->ci - oldci) + L->base_ci;
+  L->end_ci = L->base_ci + L->size_ci - 1;
+}
+
+
+void luaD_growstack (lua_State *L, int n) {
+  if (n <= L->stacksize)  /* double size is enough? */
+    luaD_reallocstack(L, 2*L->stacksize);
+  else
+    luaD_reallocstack(L, L->stacksize + n);
+}
+
+
+static CallInfo *growCI (lua_State *L) {
+  if (L->size_ci > LUAI_MAXCALLS)  /* overflow while handling overflow? */
+    luaD_throw(L, LUA_ERRERR);
+  else {
+    luaD_reallocCI(L, 2*L->size_ci);
+    if (L->size_ci > LUAI_MAXCALLS)
+      luaG_runerror(L, "stack overflow");
+  }
+  return ++L->ci;
+}
+
+
+void luaD_callhook (lua_State *L, int event, int line) {
+  lua_Hook hook = L->hook;
+  if (hook && L->allowhook) {
+    ptrdiff_t top = savestack(L, L->top);
+    ptrdiff_t ci_top = savestack(L, L->ci->top);
+    lua_Debug ar;
+    ar.event = event;
+    ar.currentline = line;
+    if (event == LUA_HOOKTAILRET)
+      ar.i_ci = 0;  /* tail call; no debug information about it */
+    else
+      ar.i_ci = cast(int, L->ci - L->base_ci);
+    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
+    L->ci->top = L->top + LUA_MINSTACK;
+    lua_assert(L->ci->top <= L->stack_last);
+    L->allowhook = 0;  /* cannot call hooks inside a hook */
+    lua_unlock(L);
+    (*hook)(L, &ar);
+    lua_lock(L);
+    lua_assert(!L->allowhook);
+    L->allowhook = 1;
+    L->ci->top = restorestack(L, ci_top);
+    L->top = restorestack(L, top);
+  }
+}
+
+
+static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
+  int i;
+  int nfixargs = p->numparams;
+  Table *htab = NULL;
+  StkId base, fixed;
+  for (; actual < nfixargs; ++actual)
+    setnilvalue(L->top++);
+#if defined(LUA_COMPAT_VARARG)
+  if (p->is_vararg & VARARG_NEEDSARG) { /* compat. with old-style vararg? */
+    int nvar = actual - nfixargs;  /* number of extra arguments */
+    lua_assert(p->is_vararg & VARARG_HASARG);
+    luaC_checkGC(L);
+    htab = luaH_new(L, nvar, 1);  /* create `arg' table */
+    for (i=0; i<nvar; i++)  /* put extra arguments into `arg' table */
+      setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i);
+    /* store counter in field `n' */
+    setnvalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")),
+                                   cast(lua_Number, nvar));
+  }
+#endif
+  /* move fixed parameters to final position */
+  fixed = L->top - actual;  /* first fixed argument */
+  base = L->top;  /* final position of first argument */
+  for (i=0; i<nfixargs; i++) {
+    setobjs2s(L, L->top++, fixed+i);
+    setnilvalue(fixed+i);
+  }
+  /* add `arg' parameter */
+  if (htab) {
+    sethvalue(L, L->top++, htab);
+    lua_assert(iswhite(obj2gco(htab)));
+  }
+  return base;
+}
+
+
+static StkId tryfuncTM (lua_State *L, StkId func) {
+  const TValue *tm = luaT_gettmbyobj(L, func, TM_CALL);
+  StkId p;
+  ptrdiff_t funcr = savestack(L, func);
+  if (!ttisfunction(tm))
+    luaG_typeerror(L, func, "call");
+  /* Open a hole inside the stack at `func' */
+  for (p = L->top; p > func; p--) setobjs2s(L, p, p-1);
+  incr_top(L);
+  func = restorestack(L, funcr);  /* previous call may change stack */
+  setobj2s(L, func, tm);  /* tag method is the new function to be called */
+  return func;
+}
+
+
+
+#define inc_ci(L) \
+  ((L->ci == L->end_ci) ? growCI(L) : \
+   (condhardstacktests(luaD_reallocCI(L, L->size_ci)), ++L->ci))
+
+
+int luaD_precall (lua_State *L, StkId func, int nresults) {
+  LClosure *cl;
+  ptrdiff_t funcr;
+  if (!ttisfunction(func)) /* `func' is not a function? */
+    func = tryfuncTM(L, func);  /* check the `function' tag method */
+  funcr = savestack(L, func);
+  cl = &clvalue(func)->l;
+  L->ci->savedpc = L->savedpc;
+  if (!cl->isC) {  /* Lua function? prepare its call */
+    CallInfo *ci;
+    StkId st, base;
+    Proto *p = cl->p;
+    luaD_checkstack(L, p->maxstacksize);
+    func = restorestack(L, funcr);
+    if (!p->is_vararg)  /* no varargs? */
+      base = func + 1;
+    else {  /* vararg function */
+      int nargs = cast(int, L->top - func) - 1;
+      base = adjust_varargs(L, p, nargs);
+      func = restorestack(L, funcr);  /* previous call may change the stack */
+    }
+    ci = inc_ci(L);  /* now `enter' new function */
+    ci->func = func;
+    L->base = ci->base = base;
+    ci->top = L->base + p->maxstacksize;
+    lua_assert(ci->top <= L->stack_last);
+    L->savedpc = p->code;  /* starting point */
+    ci->tailcalls = 0;
+    ci->nresults = nresults;
+    for (st = L->top; st < ci->top; st++)
+      setnilvalue(st);
+    L->top = ci->top;
+    if (L->hookmask & LUA_MASKCALL) {
+      L->savedpc++;  /* hooks assume 'pc' is already incremented */
+      luaD_callhook(L, LUA_HOOKCALL, -1);
+      L->savedpc--;  /* correct 'pc' */
+    }
+    return PCRLUA;
+  }
+  else {  /* if is a C function, call it */
+    CallInfo *ci;
+    int n;
+    luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
+    ci = inc_ci(L);  /* now `enter' new function */
+    ci->func = restorestack(L, funcr);
+    L->base = ci->base = ci->func + 1;
+    ci->top = L->top + LUA_MINSTACK;
+    lua_assert(ci->top <= L->stack_last);
+    ci->nresults = nresults;
+    if (L->hookmask & LUA_MASKCALL)
+      luaD_callhook(L, LUA_HOOKCALL, -1);
+    lua_unlock(L);
+    n = (*curr_func(L)->c.f)(L);  /* do the actual call */
+    lua_lock(L);
+    if (n >= 0) {  /* no yielding? */
+      luaD_poscall(L, L->top - n);
+      return PCRC;
+    }
+    else {
+      ci->nresults = nresults;
+      return PCRYIELD;
+    }
+  }
+}
+
+
+static StkId callrethooks (lua_State *L, StkId firstResult) {
+  ptrdiff_t fr = savestack(L, firstResult);  /* next call may change stack */
+  luaD_callhook(L, LUA_HOOKRET, -1);
+  if (f_isLua(L->ci)) {  /* Lua function? */
+    while (L->ci->tailcalls--)  /* call hook for eventual tail calls */
+      luaD_callhook(L, LUA_HOOKTAILRET, -1);
+  }
+  return restorestack(L, fr);
+}
+
+
+int luaD_poscall (lua_State *L, StkId firstResult) {
+  StkId res;
+  int wanted, i;
+  CallInfo *ci;
+  if (L->hookmask & LUA_MASKRET)
+    firstResult = callrethooks(L, firstResult);
+  ci = L->ci--;
+  res = ci->func;  /* res == final position of 1st result */
+  wanted = ci->nresults;
+  L->base = (ci - 1)->base;  /* restore base */
+  L->savedpc = (ci - 1)->savedpc;  /* restore savedpc */
+  /* move results to correct place */
+  for (i = wanted; i != 0 && firstResult < L->top; i--)
+    setobjs2s(L, res++, firstResult++);
+  while (i-- > 0)
+    setnilvalue(res++);
+  L->top = res;
+  return (wanted - LUA_MULTRET);  /* 0 iff wanted == LUA_MULTRET */
+}
+
+
+/*
+** Call a function (C or Lua). The function to be called is at *func.
+** The arguments are on the stack, right after the function.
+** When returns, all the results are on the stack, starting at the original
+** function position.
+*/ 
+void luaD_call (lua_State *L, StkId func, int nResults) {
+  if (++L->nCcalls >= LUAI_MAXCCALLS) {
+    if (L->nCcalls == LUAI_MAXCCALLS)
+      luaG_runerror(L, "C stack overflow");
+    else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
+      luaD_throw(L, LUA_ERRERR);  /* error while handing stack error */
+  }
+  if (luaD_precall(L, func, nResults) == PCRLUA)  /* is a Lua function? */
+    luaV_execute(L, 1);  /* call it */
+  L->nCcalls--;
+  luaC_checkGC(L);
+}
+
+
+static void resume (lua_State *L, void *ud) {
+  StkId firstArg = cast(StkId, ud);
+  CallInfo *ci = L->ci;
+  if (L->status != LUA_YIELD) {  /* start coroutine */
+    lua_assert(ci == L->base_ci && firstArg > L->base);
+    if (luaD_precall(L, firstArg - 1, LUA_MULTRET) != PCRLUA)
+      return;
+  }
+  else {  /* resuming from previous yield */
+    if (!f_isLua(ci)) {  /* `common' yield? */
+      /* finish interrupted execution of `OP_CALL' */
+      lua_assert(GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_CALL ||
+                 GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_TAILCALL);
+      if (luaD_poscall(L, firstArg))  /* complete it... */
+        L->top = L->ci->top;  /* and correct top if not multiple results */
+    }
+    else  /* yielded inside a hook: just continue its execution */
+      L->base = L->ci->base;
+  }
+  L->status = 0;
+  luaV_execute(L, cast(int, L->ci - L->base_ci));
+}
+
+
+static int resume_error (lua_State *L, const char *msg) {
+  L->top = L->ci->base;
+  setsvalue2s(L, L->top, luaS_new(L, msg));
+  incr_top(L);
+  lua_unlock(L);
+  return LUA_ERRRUN;
+}
+
+
+LUA_API int lua_resume (lua_State *L, int nargs) {
+  int status;
+  lua_lock(L);
+  if (L->status != LUA_YIELD) {
+    if (L->status != 0)
+      return resume_error(L, "cannot resume dead coroutine");
+    else if (L->ci != L->base_ci)
+      return resume_error(L, "cannot resume non-suspended coroutine");
+  }
+  luai_userstateresume(L, nargs);
+  lua_assert(L->errfunc == 0 && L->nCcalls == 0);
+  status = luaD_rawrunprotected(L, resume, L->top - nargs);
+  if (status != 0) {  /* error? */
+    L->status = cast(lu_byte, status);  /* mark thread as `dead' */
+    luaD_seterrorobj(L, status, L->top);
+  }
+  else
+    status = L->status;
+  lua_unlock(L);
+  return status;
+}
+
+
+LUA_API int lua_yield (lua_State *L, int nresults) {
+  luai_userstateyield(L, nresults);
+  lua_lock(L);
+  if (L->nCcalls > 0)
+    luaG_runerror(L, "attempt to yield across metamethod/C-call boundary");
+  L->base = L->top - nresults;  /* protect stack slots below */
+  L->status = LUA_YIELD;
+  lua_unlock(L);
+  return -1;
+}
+
+
+int luaD_pcall (lua_State *L, Pfunc func, void *u,
+                ptrdiff_t old_top, ptrdiff_t ef) {
+  int status;
+  unsigned short oldnCcalls = L->nCcalls;
+  ptrdiff_t old_ci = saveci(L, L->ci);
+  lu_byte old_allowhooks = L->allowhook;
+  ptrdiff_t old_errfunc = L->errfunc;
+  L->errfunc = ef;
+  status = luaD_rawrunprotected(L, func, u);
+  if (status != 0) {  /* an error occurred? */
+    StkId oldtop = restorestack(L, old_top);
+    luaF_close(L, oldtop);  /* close eventual pending closures */
+    luaD_seterrorobj(L, status, oldtop);
+    L->nCcalls = oldnCcalls;
+    L->ci = restoreci(L, old_ci);
+    L->base = L->ci->base;
+    L->savedpc = L->ci->savedpc;
+    L->allowhook = old_allowhooks;
+    restore_stack_limit(L);
+  }
+  L->errfunc = old_errfunc;
+  return status;
+}
+
+
+
+/*
+** Execute a protected parser.
+*/
+struct SParser {  /* data to `f_parser' */
+  ZIO *z;
+  Mbuffer buff;  /* buffer to be used by the scanner */
+  const char *name;
+};
+
+static void f_parser (lua_State *L, void *ud) {
+  int i;
+  Proto *tf;
+  Closure *cl;
+  struct SParser *p = cast(struct SParser *, ud);
+  int c = luaZ_lookahead(p->z);
+  luaC_checkGC(L);
+  tf = ((c == LUA_SIGNATURE[0]) ? luaU_undump : luaY_parser)(L, p->z,
+                                                             &p->buff, p->name);
+  cl = luaF_newLclosure(L, tf->nups, hvalue(gt(L)));
+  cl->l.p = tf;
+  for (i = 0; i < tf->nups; i++)  /* initialize eventual upvalues */
+    cl->l.upvals[i] = luaF_newupval(L);
+  setclvalue(L, L->top, cl);
+  incr_top(L);
+}
+
+
+int luaD_protectedparser (lua_State *L, ZIO *z, const char *name) {
+  struct SParser p;
+  int status;
+  p.z = z; p.name = name;
+  luaZ_initbuffer(L, &p.buff);
+  status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc);
+  luaZ_freebuffer(L, &p.buff);
+  return status;
+}
+
+

ldo.h

@@ -0,0 +1,57 @@
+/*
+** $Id: ldo.h,v 2.6 2005/08/22 19:58:29 roberto Exp roberto $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ldo_h
+#define ldo_h
+
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lzio.h"
+
+
+#define luaD_checkstack(L,n)	\
+  if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \
+    luaD_growstack(L, n); \
+  else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1));
+
+
+#define incr_top(L) {luaD_checkstack(L,1); L->top++;}
+
+#define savestack(L,p)		((char *)(p) - (char *)L->stack)
+#define restorestack(L,n)	((TValue *)((char *)L->stack + (n)))
+
+#define saveci(L,p)		((char *)(p) - (char *)L->base_ci)
+#define restoreci(L,n)		((CallInfo *)((char *)L->base_ci + (n)))
+
+
+/* results from luaD_precall */
+#define PCRLUA		0	/* initiated a call to a Lua function */
+#define PCRC		1	/* did a call to a C function */
+#define PCRYIELD	2	/* C funtion yielded */
+
+
+/* type of protected functions, to be ran by `runprotected' */
+typedef void (*Pfunc) (lua_State *L, void *ud);
+
+LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name);
+LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line);
+LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
+LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
+LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
+                                        ptrdiff_t oldtop, ptrdiff_t ef);
+LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
+LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize);
+LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
+LUAI_FUNC void luaD_growstack (lua_State *L, int n);
+
+LUAI_FUNC void luaD_throw (lua_State *L, int errcode);
+LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
+
+LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
+
+#endif
+

ldump.c

@@ -0,0 +1,179 @@
+/*
+** $Id: ldump.c,v 2.5 2005/05/05 20:47:02 roberto Exp roberto $
+** save pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#include <stddef.h>
+
+#define ldump_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lundump.h"
+
+#define DumpVector(b,n,size,D)	DumpBlock(b,(n)*(size),D)
+#define DumpLiteral(s,D)	DumpBlock("" s,(sizeof(s))-1,D)
+
+typedef struct {
+ lua_State* L;
+ lua_Writer writer;
+ void* data;
+ int strip;
+ int status;
+} DumpState;
+
+static void DumpBlock(const void* b, size_t size, DumpState* D)
+{
+ if (D->status==0)
+ {
+  lua_unlock(D->L);
+  D->status=(*D->writer)(D->L,b,size,D->data);
+  lua_lock(D->L);
+ }
+}
+
+static void DumpByte(int y, DumpState* D)
+{
+ char x=(char)y;
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpInt(int x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpSize(size_t x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpNumber(lua_Number x, DumpState* D)
+{
+ DumpBlock(&x,sizeof(x),D);
+}
+
+static void DumpString(const TString* s, DumpState* D)
+{
+ if (s==NULL || getstr(s)==NULL)
+  DumpSize(0,D);
+ else
+ {
+  size_t size=s->tsv.len+1;		/* include trailing '\0' */
+  DumpSize(size,D);
+  DumpBlock(getstr(s),size,D);
+ }
+}
+
+static void DumpCode(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizecode,D);
+ DumpVector(f->code,f->sizecode,sizeof(*f->code),D);
+}
+
+static void DumpLocals(const Proto* f, DumpState* D)
+{
+ int i,n=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);
+ }
+}
+
+static void DumpLines(const Proto* f, DumpState* D)
+{
+ DumpInt(f->sizelineinfo,D);
+ DumpVector(f->lineinfo,f->sizelineinfo,sizeof(*f->lineinfo),D);
+}
+
+static void DumpUpvalues(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpString(f->upvalues[i],D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D);
+
+static void DumpConstants(const Proto* f, DumpState* D)
+{
+ int i,n;
+ DumpInt(n=f->sizek,D);
+ for (i=0; i<n; i++)
+ {
+  const TValue* o=&f->k[i];
+  DumpByte(ttype(o),D);
+  switch (ttype(o))
+  {
+   case LUA_TNUMBER:
+	DumpNumber(nvalue(o),D);
+	break;
+   case LUA_TSTRING:
+	DumpString(rawtsvalue(o),D);
+	break;
+   case LUA_TNIL:
+	break;
+   case LUA_TBOOLEAN:
+        DumpByte(bvalue(o),D);
+        break;
+   default:
+	lua_assert(0);			/* cannot happen */
+	break;
+  }
+ }
+ DumpInt(n=f->sizep,D);
+ for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D);
+}
+
+static void DumpFunction(const Proto* f, const TString* p, DumpState* D)
+{
+ DumpString((f->source==p) ? NULL : f->source,D);
+ DumpInt(f->linedefined,D);
+ DumpInt(f->lastlinedefined,D);
+ DumpByte(f->nups,D);
+ DumpByte(f->numparams,D);
+ DumpByte(f->is_vararg,D);
+ DumpByte(f->maxstacksize,D);
+ if (D->strip) DumpInt(0,D); else DumpLines(f,D);
+ if (D->strip) DumpInt(0,D); else DumpLocals(f,D);
+ if (D->strip) DumpInt(0,D); else DumpUpvalues(f,D);
+ DumpConstants(f,D);
+ DumpCode(f,D);
+}
+
+static void DumpHeader(DumpState* D)
+{
+ DumpLiteral(LUA_SIGNATURE,D);
+ DumpByte(VERSION,D);
+ DumpByte(luaU_endianness(),D);
+ DumpByte(sizeof(int),D);
+ DumpByte(sizeof(size_t),D);
+ DumpByte(sizeof(Instruction),D);
+ DumpByte(sizeof(lua_Number),D);
+ DumpNumber(TEST_NUMBER,D);
+}
+
+/*
+** dump Lua function as precompiled chunk
+*/
+int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data,
+                             int strip)
+{
+ DumpState D;
+ D.L=L;
+ D.writer=w;
+ D.data=data;
+ D.strip=strip;
+ D.status=0;
+ DumpHeader(&D);
+ DumpFunction(f,NULL,&D);
+ return D.status;
+}

lex.c

@@ -1,233 +0,0 @@
-char *rcs_lex = "$Id: lex.c,v 1.3 1993/12/28 16:42:29 roberto Exp celes $";
-/*$Log: lex.c,v $
- * Revision 1.3  1993/12/28  16:42:29  roberto
- * "include"s de string.h e stdlib.h para evitar warnings
- *
- * Revision 1.2  1993/12/22  21:39:15  celes
- * Tratamento do token $debug e $nodebug
- *
- * Revision 1.1  1993/12/22  21:15:16  roberto
- * Initial revision
- **/
-
-#include <ctype.h>
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y.tab.h"
-
-#define next() { current = input(); }
-#define save(x) { *yytextLast++ = (x); }
-#define save_and_next()  { save(current); next(); }
-
-static int current;
-static char yytext[256];
-static char *yytextLast;
-
-static Input input;
-
-void lua_setinput (Input fn)
-{
-  current = ' ';
-  input = fn;
-}
-
-char *lua_lasttext (void)
-{
-  *yytextLast = 0;
-  return yytext;
-}
-
-
-static struct 
-  {
-    char *name;
-    int token;
-  } reserved [] = {
-      {"and", AND},
-      {"do", DO},
-      {"else", ELSE},
-      {"elseif", ELSEIF},
-      {"end", END},
-      {"function", FUNCTION},
-      {"if", IF},
-      {"local", LOCAL},
-      {"nil", NIL},
-      {"not", NOT},
-      {"or", OR},
-      {"repeat", REPEAT},
-      {"return", RETURN},
-      {"then", THEN},
-      {"until", UNTIL},
-      {"while", WHILE} };
-
-#define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0]))
-
-
-int findReserved (char *name)
-{
-  int l = 0;
-  int h = RESERVEDSIZE - 1;
-  while (l <= h)
-  {
-    int m = (l+h)/2;
-    int comp = strcmp(name, reserved[m].name);
-    if (comp < 0)
-      h = m-1;
-    else if (comp == 0)
-      return reserved[m].token;
-    else
-      l = m+1;
-  }
-  return 0;
-}
-
-
-int yylex ()
-{
-  while (1)
-  {
-    yytextLast = yytext;
-    switch (current)
-    {
-      case '\n': lua_linenumber++;
-      case ' ':
-      case '\t':
-        next();
-        continue;
-
-      case '$':
-	next();
-	while (isalnum(current) || current == '_')
-          save_and_next();
-        *yytextLast = 0;
-	if (strcmp(yytext, "debug") == 0)
-	{
-	  yylval.vInt = 1;
-	  return DEBUG;
-        }
-	else if (strcmp(yytext, "nodebug") == 0)
-	{
-	  yylval.vInt = 0;
-	  return DEBUG;
-        }
-	return WRONGTOKEN;
-  
-      case '-':
-        save_and_next();
-        if (current != '-') return '-';
-        do { next(); } while (current != '\n' && current != 0);
-        continue;
-  
-      case '<':
-        save_and_next();
-        if (current != '=') return '<';
-        else { save_and_next(); return LE; }
-  
-      case '>':
-        save_and_next();
-        if (current != '=') return '>';
-        else { save_and_next(); return GE; }
-  
-      case '~':
-        save_and_next();
-        if (current != '=') return '~';
-        else { save_and_next(); return NE; }
-
-      case '"':
-      case '\'':
-      {
-        int del = current;
-        next();  /* skip the delimiter */
-        while (current != del) 
-        {
-          switch (current)
-          {
-            case 0: 
-            case '\n': 
-              return WRONGTOKEN;
-            case '\\':
-              next();  /* do not save the '\' */
-              switch (current)
-              {
-                case 'n': save('\n'); next(); break;
-                case 't': save('\t'); next(); break;
-                case 'r': save('\r'); next(); break;
-                default : save('\\'); break;
-              }
-              break;
-            default: 
-              save_and_next();
-          }
-        }
-        next();  /* skip the delimiter */
-        *yytextLast = 0;
-        yylval.vWord = lua_findconstant (yytext);
-        return STRING;
-      }
-
-      case 'a': case 'b': case 'c': case 'd': case 'e':
-      case 'f': case 'g': case 'h': case 'i': case 'j':
-      case 'k': case 'l': case 'm': case 'n': case 'o':
-      case 'p': case 'q': case 'r': case 's': case 't':
-      case 'u': case 'v': case 'w': case 'x': case 'y':
-      case 'z':
-      case 'A': case 'B': case 'C': case 'D': case 'E':
-      case 'F': case 'G': case 'H': case 'I': case 'J':
-      case 'K': case 'L': case 'M': case 'N': case 'O':
-      case 'P': case 'Q': case 'R': case 'S': case 'T':
-      case 'U': case 'V': case 'W': case 'X': case 'Y':
-      case 'Z':
-      case '_':
-      {
-        int res;
-        do { save_and_next(); } while (isalnum(current) || current == '_');
-        *yytextLast = 0;
-        res = findReserved(yytext);
-        if (res) return res;
-        yylval.pChar = yytext;
-        return NAME;
-      }
-   
-      case '.':
-        save_and_next();
-        if (current == '.') 
-        { 
-          save_and_next(); 
-          return CONC;
-        }
-        else if (!isdigit(current)) return '.';
-        /* current is a digit: goes through to number */
-        goto fraction;
-
-      case '0': case '1': case '2': case '3': case '4':
-      case '5': case '6': case '7': case '8': case '9':
-      
-        do { save_and_next(); } while (isdigit(current));
-        if (current == '.') save_and_next();
-fraction: while (isdigit(current)) save_and_next();
-        if (current == 'e' || current == 'E')
-        {
-          save_and_next();
-          if (current == '+' || current == '-') save_and_next();
-          if (!isdigit(current)) return WRONGTOKEN;
-          do { save_and_next(); } while (isdigit(current));
-        }
-        *yytextLast = 0;
-        yylval.vFloat = atof(yytext);
-        return NUMBER;
-
-      default: 		/* also end of file */
-      {
-        save_and_next();
-        return *yytext;      
-      }
-    }
-  }
-}
-        

lfunc.c

@@ -0,0 +1,174 @@
+/*
+** $Id: lfunc.c,v 2.10 2005/04/29 13:54:05 roberto Exp roberto $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stddef.h>
+
+#define lfunc_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) {
+  Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems)));
+  luaC_link(L, obj2gco(c), LUA_TFUNCTION);
+  c->c.isC = 1;
+  c->c.env = e;
+  c->c.nupvalues = cast(lu_byte, nelems);
+  return c;
+}
+
+
+Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e) {
+  Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems)));
+  luaC_link(L, obj2gco(c), LUA_TFUNCTION);
+  c->l.isC = 0;
+  c->l.env = e;
+  c->l.nupvalues = cast(lu_byte, nelems);
+  while (nelems--) c->l.upvals[nelems] = NULL;
+  return c;
+}
+
+
+UpVal *luaF_newupval (lua_State *L) {
+  UpVal *uv = luaM_new(L, UpVal);
+  luaC_link(L, obj2gco(uv), LUA_TUPVAL);
+  uv->v = &uv->u.value;
+  setnilvalue(uv->v);
+  return uv;
+}
+
+
+UpVal *luaF_findupval (lua_State *L, StkId level) {
+  global_State *g = G(L);
+  GCObject **pp = &L->openupval;
+  UpVal *p;
+  UpVal *uv;
+  while ((p = ngcotouv(*pp)) != NULL && p->v >= level) {
+    lua_assert(p->v != &p->u.value);
+    if (p->v == level) {  /* found a corresponding upvalue? */
+      if (isdead(g, obj2gco(p)))  /* is it dead? */
+        changewhite(obj2gco(p));  /* ressurect it */
+      return p;
+    }
+    pp = &p->next;
+  }
+  uv = luaM_new(L, UpVal);  /* not found: create a new one */
+  uv->tt = LUA_TUPVAL;
+  uv->marked = luaC_white(g);
+  uv->v = level;  /* current value lives in the stack */
+  uv->next = *pp;  /* chain it in the proper position */
+  *pp = obj2gco(uv);
+  uv->u.l.prev = &g->uvhead;  /* double link it in `uvhead' list */
+  uv->u.l.next = g->uvhead.u.l.next;
+  uv->u.l.next->u.l.prev = uv;
+  g->uvhead.u.l.next = uv;
+  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
+  return uv;
+}
+
+
+static void unlinkupval (UpVal *uv) {
+  lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
+  uv->u.l.next->u.l.prev = uv->u.l.prev;  /* remove from `uvhead' list */
+  uv->u.l.prev->u.l.next = uv->u.l.next;
+}
+
+
+void luaF_freeupval (lua_State *L, UpVal *uv) {
+  if (uv->v != &uv->u.value)  /* is it open? */
+    unlinkupval(uv);  /* remove from open list */
+  luaM_free(L, uv);  /* free upvalue */
+}
+
+
+void luaF_close (lua_State *L, StkId level) {
+  UpVal *uv;
+  global_State *g = G(L);
+  while ((uv = ngcotouv(L->openupval)) != NULL && uv->v >= level) {
+    GCObject *o = obj2gco(uv);
+    lua_assert(!isblack(o) && uv->v != &uv->u.value);
+    L->openupval = uv->next;  /* remove from `open' list */
+    if (isdead(g, o))
+      luaF_freeupval(L, uv);  /* free upvalue */
+    else {
+      unlinkupval(uv);
+      setobj(L, &uv->u.value, uv->v);
+      uv->v = &uv->u.value;  /* now current value lives here */
+      luaC_linkupval(L, uv);  /* link upvalue into `gcroot' list */
+    }
+  }
+}
+
+
+Proto *luaF_newproto (lua_State *L) {
+  Proto *f = luaM_new(L, Proto);
+  luaC_link(L, obj2gco(f), LUA_TPROTO);
+  f->k = NULL;
+  f->sizek = 0;
+  f->p = NULL;
+  f->sizep = 0;
+  f->code = NULL;
+  f->sizecode = 0;
+  f->sizelineinfo = 0;
+  f->sizeupvalues = 0;
+  f->nups = 0;
+  f->upvalues = NULL;
+  f->numparams = 0;
+  f->is_vararg = 0;
+  f->maxstacksize = 0;
+  f->lineinfo = NULL;
+  f->sizelocvars = 0;
+  f->locvars = NULL;
+  f->linedefined = 0;
+  f->lastlinedefined = 0;
+  f->source = NULL;
+  return f;
+}
+
+
+void luaF_freeproto (lua_State *L, Proto *f) {
+  luaM_freearray(L, f->code, f->sizecode, Instruction);
+  luaM_freearray(L, f->p, f->sizep, Proto *);
+  luaM_freearray(L, f->k, f->sizek, TValue);
+  luaM_freearray(L, f->lineinfo, f->sizelineinfo, int);
+  luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar);
+  luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *);
+  luaM_free(L, f);
+}
+
+
+void luaF_freeclosure (lua_State *L, Closure *c) {
+  int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
+                          sizeLclosure(c->l.nupvalues);
+  luaM_freemem(L, c, size);
+}
+
+
+/*
+** Look for n-th local variable at line `line' in function `func'.
+** Returns NULL if not found.
+*/
+const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
+  int i;
+  for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
+    if (pc < f->locvars[i].endpc) {  /* is variable active? */
+      local_number--;
+      if (local_number == 0)
+        return getstr(f->locvars[i].varname);
+    }
+  }
+  return NULL;  /* not found */
+}
+

lfunc.h

@@ -0,0 +1,34 @@
+/*
+** $Id: lfunc.h,v 2.3 2005/02/18 12:40:02 roberto Exp roberto $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lfunc_h
+#define lfunc_h
+
+
+#include "lobject.h"
+
+
+#define sizeCclosure(n)	(cast(int, sizeof(CClosure)) + \
+                         cast(int, sizeof(TValue)*((n)-1)))
+
+#define sizeLclosure(n)	(cast(int, sizeof(LClosure)) + \
+                         cast(int, sizeof(TValue *)*((n)-1)))
+
+
+LUAI_FUNC Proto *luaF_newproto (lua_State *L);
+LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e);
+LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e);
+LUAI_FUNC UpVal *luaF_newupval (lua_State *L);
+LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
+LUAI_FUNC void luaF_close (lua_State *L, StkId level);
+LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
+LUAI_FUNC void luaF_freeclosure (lua_State *L, Closure *c);
+LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
+LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
+                                         int pc);
+
+
+#endif

lgc.c

@@ -0,0 +1,708 @@
+/*
+** $Id: lgc.c,v 2.35 2005/08/04 13:37:38 roberto Exp roberto $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#include <string.h>
+
+#define lgc_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+#define GCSTEPSIZE	1024u
+#define GCSWEEPMAX	40
+#define GCSWEEPCOST	10
+#define GCFINALIZECOST	100
+
+
+#define maskmarks \
+	cast(lu_byte, ~(bitmask(BLACKBIT)|WHITEBITS))
+
+#define makewhite(g,x)	\
+   ((x)->gch.marked = ((x)->gch.marked & maskmarks) | luaC_white(g))
+
+#define white2gray(x)	reset2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
+#define black2gray(x)	resetbit((x)->gch.marked, BLACKBIT)
+
+#define stringmark(s)	reset2bits((s)->tsv.marked, WHITE0BIT, WHITE1BIT)
+
+
+#define isfinalized(u)		testbit((u)->marked, FINALIZEDBIT)
+#define markfinalized(u)	l_setbit((u)->marked, FINALIZEDBIT)
+
+
+#define KEYWEAK         bitmask(KEYWEAKBIT)
+#define VALUEWEAK       bitmask(VALUEWEAKBIT)
+
+
+
+#define markvalue(g,o) { checkconsistency(o); \
+  if (iscollectable(o) && iswhite(gcvalue(o))) reallymarkobject(g,gcvalue(o)); }
+
+#define markobject(g,t) { if (iswhite(obj2gco(t))) \
+		reallymarkobject(g, obj2gco(t)); }
+
+
+#define setthreshold(g)  (g->GCthreshold = (g->estimate/100) * g->gcpause)
+
+
+static void removeentry (Node *n) {
+  lua_assert(ttisnil(gval(n)));
+  if (iscollectable(gkey(n)))
+    setttype(gkey(n), LUA_TDEADKEY);  /* dead key; remove it */
+}
+
+
+static void reallymarkobject (global_State *g, GCObject *o) {
+  lua_assert(iswhite(o) && !isdead(g, o));
+  white2gray(o);
+  switch (o->gch.tt) {
+    case LUA_TSTRING: {
+      return;
+    }
+    case LUA_TUSERDATA: {
+      Table *mt = gco2u(o)->metatable;
+      gray2black(o);  /* udata are never gray */
+      if (mt) markobject(g, mt);
+      markobject(g, gco2u(o)->env);
+      return;
+    }
+    case LUA_TUPVAL: {
+      UpVal *uv = gco2uv(o);
+      markvalue(g, uv->v);
+      if (uv->v == &uv->u.value)  /* closed? */
+        gray2black(o);  /* open upvalues are never black */
+      return;
+    }
+    case LUA_TFUNCTION: {
+      gco2cl(o)->c.gclist = g->gray;
+      g->gray = o;
+      break;
+    }
+    case LUA_TTABLE: {
+      gco2h(o)->gclist = g->gray;
+      g->gray = o;
+      break;
+    }
+    case LUA_TTHREAD: {
+      gco2th(o)->gclist = g->gray;
+      g->gray = o;
+      break;
+    }
+    case LUA_TPROTO: {
+      gco2p(o)->gclist = g->gray;
+      g->gray = o;
+      break;
+    }
+    default: lua_assert(0);
+  }
+}
+
+
+static void marktmu (global_State *g) {
+  GCObject *u = g->tmudata;
+  if (u) {
+    do {
+      u = u->gch.next;
+      makewhite(g, u);  /* may be marked, if left from previous GC */
+      reallymarkobject(g, u);
+    } while (u != g->tmudata);
+  }
+}
+
+
+/* move `dead' udata that need finalization to list `tmudata' */
+size_t luaC_separateudata (lua_State *L, int all) {
+  global_State *g = G(L);
+  size_t deadmem = 0;
+  GCObject **p = &g->mainthread->next;
+  GCObject *curr;
+  while ((curr = *p) != NULL) {
+    if (!(iswhite(curr) || all) || isfinalized(gco2u(curr)))
+      p = &curr->gch.next;  /* don't bother with them */
+    else if (fasttm(L, gco2u(curr)->metatable, TM_GC) == NULL) {
+      markfinalized(gco2u(curr));  /* don't need finalization */
+      p = &curr->gch.next;
+    }
+    else {  /* must call its gc method */
+      deadmem += sizeudata(gco2u(curr));
+      markfinalized(gco2u(curr));
+      *p = curr->gch.next;
+      /* link `curr' at the end of `tmudata' list */
+      if (g->tmudata == NULL)  /* list is empty? */
+        g->tmudata = curr->gch.next = curr;  /* creates a circular list */
+      else {
+        curr->gch.next = g->tmudata->gch.next;
+        g->tmudata->gch.next = curr;
+        g->tmudata = curr;
+      }
+    }
+  }
+  return deadmem;
+}
+
+
+static int traversetable (global_State *g, Table *h) {
+  int i;
+  int weakkey = 0;
+  int weakvalue = 0;
+  const TValue *mode;
+  if (h->metatable)
+    markobject(g, h->metatable);
+  mode = gfasttm(g, h->metatable, TM_MODE);
+  if (mode && ttisstring(mode)) {  /* is there a weak mode? */
+    weakkey = (strchr(svalue(mode), 'k') != NULL);
+    weakvalue = (strchr(svalue(mode), 'v') != NULL);
+    if (weakkey || weakvalue) {  /* is really weak? */
+      h->marked &= ~(KEYWEAK | VALUEWEAK);  /* clear bits */
+      h->marked |= cast(lu_byte, (weakkey << KEYWEAKBIT) |
+                                 (weakvalue << VALUEWEAKBIT));
+      h->gclist = g->weak;  /* must be cleared after GC, ... */
+      g->weak = obj2gco(h);  /* ... so put in the appropriate list */
+    }
+  }
+  if (weakkey && weakvalue) return 1;
+  if (!weakvalue) {
+    i = h->sizearray;
+    while (i--)
+      markvalue(g, &h->array[i]);
+  }
+  i = sizenode(h);
+  while (i--) {
+    Node *n = gnode(h, i);
+    lua_assert(ttype(gkey(n)) != LUA_TDEADKEY || ttisnil(gval(n)));
+    if (ttisnil(gval(n)))
+      removeentry(n);  /* remove empty entries */
+    else {
+      lua_assert(!ttisnil(gkey(n)));
+      if (!weakkey) markvalue(g, gkey(n));
+      if (!weakvalue) markvalue(g, gval(n));
+    }
+  }
+  return weakkey || weakvalue;
+}
+
+
+/*
+** All marks are conditional because a GC may happen while the
+** prototype is still being created
+*/
+static void traverseproto (global_State *g, Proto *f) {
+  int i;
+  if (f->source) stringmark(f->source);
+  for (i=0; i<f->sizek; i++)  /* mark literals */
+    markvalue(g, &f->k[i]);
+  for (i=0; i<f->sizeupvalues; i++) {  /* mark upvalue names */
+    if (f->upvalues[i])
+      stringmark(f->upvalues[i]);
+  }
+  for (i=0; i<f->sizep; i++) {  /* mark nested protos */
+    if (f->p[i])
+      markobject(g, f->p[i]);
+  }
+  for (i=0; i<f->sizelocvars; i++) {  /* mark local-variable names */
+    if (f->locvars[i].varname)
+      stringmark(f->locvars[i].varname);
+  }
+}
+
+
+
+static void traverseclosure (global_State *g, Closure *cl) {
+  markobject(g, cl->c.env);
+  if (cl->c.isC) {
+    int i;
+    for (i=0; i<cl->c.nupvalues; i++)  /* mark its upvalues */
+      markvalue(g, &cl->c.upvalue[i]);
+  }
+  else {
+    int i;
+    lua_assert(cl->l.nupvalues == cl->l.p->nups);
+    markobject(g, cl->l.p);
+    for (i=0; i<cl->l.nupvalues; i++)  /* mark its upvalues */
+      markobject(g, cl->l.upvals[i]);
+  }
+}
+
+
+static void checkstacksizes (lua_State *L, StkId max) {
+  int ci_used = cast(int, L->ci - L->base_ci);  /* number of `ci' in use */
+  int s_used = cast(int, max - L->stack);  /* part of stack in use */
+  if (L->size_ci > LUAI_MAXCALLS)  /* handling overflow? */
+    return;  /* do not touch the stacks */
+  if (4*ci_used < L->size_ci && 2*BASIC_CI_SIZE < L->size_ci)
+    luaD_reallocCI(L, L->size_ci/2);  /* still big enough... */
+  condhardstacktests(luaD_reallocCI(L, ci_used + 1));
+  if (4*s_used < L->stacksize &&
+      2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
+    luaD_reallocstack(L, L->stacksize/2);  /* still big enough... */
+  condhardstacktests(luaD_reallocstack(L, s_used));
+}
+
+
+static void traversestack (global_State *g, lua_State *l) {
+  StkId o, lim;
+  CallInfo *ci;
+  markvalue(g, gt(l));
+  lim = l->top;
+  for (ci = l->base_ci; ci <= l->ci; ci++) {
+    lua_assert(ci->top <= l->stack_last);
+    if (lim < ci->top) lim = ci->top;
+  }
+  for (o = l->stack; o < l->top; o++)
+    markvalue(g, o);
+  for (; o <= lim; o++)
+    setnilvalue(o);
+  checkstacksizes(l, lim);
+}
+
+
+/*
+** traverse one gray object, turning it to black.
+** Returns `quantity' traversed.
+*/
+static l_mem propagatemark (global_State *g) {
+  GCObject *o = g->gray;
+  lua_assert(isgray(o));
+  gray2black(o);
+  switch (o->gch.tt) {
+    case LUA_TTABLE: {
+      Table *h = gco2h(o);
+      g->gray = h->gclist;
+      if (traversetable(g, h))  /* table is weak? */
+        black2gray(o);  /* keep it gray */
+      return sizeof(Table) + sizeof(TValue) * h->sizearray +
+                             sizeof(Node) * sizenode(h);
+    }
+    case LUA_TFUNCTION: {
+      Closure *cl = gco2cl(o);
+      g->gray = cl->c.gclist;
+      traverseclosure(g, cl);
+      return (cl->c.isC) ? sizeCclosure(cl->c.nupvalues) :
+                           sizeLclosure(cl->l.nupvalues);
+    }
+    case LUA_TTHREAD: {
+      lua_State *th = gco2th(o);
+      g->gray = th->gclist;
+      th->gclist = g->grayagain;
+      g->grayagain = o;
+      black2gray(o);
+      traversestack(g, th);
+      return sizeof(lua_State) + sizeof(TValue) * th->stacksize +
+                                 sizeof(CallInfo) * th->size_ci;
+    }
+    case LUA_TPROTO: {
+      Proto *p = gco2p(o);
+      g->gray = p->gclist;
+      traverseproto(g, p);
+      return sizeof(Proto) + sizeof(Instruction) * p->sizecode +
+                             sizeof(Proto *) * p->sizep +
+                             sizeof(TValue) * p->sizek + 
+                             sizeof(int) * p->sizelineinfo +
+                             sizeof(LocVar) * p->sizelocvars +
+                             sizeof(TString *) * p->sizeupvalues;
+    }
+    default: lua_assert(0); return 0;
+  }
+}
+
+
+static void propagateall (global_State *g) {
+  while (g->gray) propagatemark(g);
+}
+
+
+/*
+** The next function tells whether a key or value can be cleared from
+** a weak table. Non-collectable objects are never removed from weak
+** tables. Strings behave as `values', so are never removed too. for
+** other objects: if really collected, cannot keep them; for userdata
+** being finalized, keep them in keys, but not in values
+*/
+static int iscleared (const TValue *o, int iskey) {
+  if (!iscollectable(o)) return 0;
+  if (ttisstring(o)) {
+    stringmark(rawtsvalue(o));  /* strings are `values', so are never weak */
+    return 0;
+  }
+  return iswhite(gcvalue(o)) ||
+    (ttisuserdata(o) && (!iskey && isfinalized(uvalue(o))));
+}
+
+
+/*
+** clear collected entries from weaktables
+*/
+static void cleartable (GCObject *l) {
+  while (l) {
+    Table *h = gco2h(l);
+    int i = h->sizearray;
+    lua_assert(testbit(h->marked, VALUEWEAKBIT) ||
+               testbit(h->marked, KEYWEAKBIT));
+    if (testbit(h->marked, VALUEWEAKBIT)) {
+      while (i--) {
+        TValue *o = &h->array[i];
+        if (iscleared(o, 0))  /* value was collected? */
+          setnilvalue(o);  /* remove value */
+      }
+    }
+    i = sizenode(h);
+    while (i--) {
+      Node *n = gnode(h, i);
+      if (!ttisnil(gval(n)) &&  /* non-empty entry? */
+          (iscleared(key2tval(n), 1) || iscleared(gval(n), 0))) {
+        setnilvalue(gval(n));  /* remove value ... */
+        removeentry(n);  /* remove entry from table */
+      }
+    }
+    l = h->gclist;
+  }
+}
+
+
+static void freeobj (lua_State *L, GCObject *o) {
+  switch (o->gch.tt) {
+    case LUA_TPROTO: luaF_freeproto(L, gco2p(o)); break;
+    case LUA_TFUNCTION: luaF_freeclosure(L, gco2cl(o)); break;
+    case LUA_TUPVAL: luaF_freeupval(L, gco2uv(o)); break;
+    case LUA_TTABLE: luaH_free(L, gco2h(o)); break;
+    case LUA_TTHREAD: {
+      lua_assert(gco2th(o) != L && gco2th(o) != G(L)->mainthread);
+      luaE_freethread(L, gco2th(o));
+      break;
+    }
+    case LUA_TSTRING: {
+      G(L)->strt.nuse--;
+      luaM_freemem(L, o, sizestring(gco2ts(o)));
+      break;
+    }
+    case LUA_TUSERDATA: {
+      luaM_freemem(L, o, sizeudata(gco2u(o)));
+      break;
+    }
+    default: lua_assert(0);
+  }
+}
+
+
+
+#define sweepwholelist(L,p)	sweeplist(L,p,MAX_LUMEM)
+
+
+static GCObject **sweeplist (lua_State *L, GCObject **p, lu_mem count) {
+  GCObject *curr;
+  global_State *g = G(L);
+  int deadmask = otherwhite(g);
+  while ((curr = *p) != NULL && count-- > 0) {
+    if (curr->gch.tt == LUA_TTHREAD)  /* sweep open upvalues of each thread */
+      sweepwholelist(L, &gco2th(curr)->openupval);
+    if ((curr->gch.marked ^ WHITEBITS) & deadmask) {  /* not dead? */
+      lua_assert(!isdead(g, curr) || testbit(curr->gch.marked, FIXEDBIT));
+      makewhite(g, curr);  /* make it white (for next cycle) */
+      p = &curr->gch.next;
+    }
+    else {  /* must erase `curr' */
+      lua_assert(isdead(g, curr) || deadmask == bitmask(SFIXEDBIT));
+      *p = curr->gch.next;
+      if (curr == g->rootgc)  /* is the first element of the list? */
+        g->rootgc = curr->gch.next;  /* adjust first */
+      freeobj(L, curr);
+    }
+  }
+  return p;
+}
+
+
+static void checkSizes (lua_State *L) {
+  global_State *g = G(L);
+  /* check size of string hash */
+  if (g->strt.nuse < cast(lu_int32, g->strt.size/4) &&
+      g->strt.size > MINSTRTABSIZE*2)
+    luaS_resize(L, g->strt.size/2);  /* table is too big */
+  /* check size of buffer */
+  if (luaZ_sizebuffer(&g->buff) > LUA_MINBUFFER*2) {  /* buffer too big? */
+    size_t newsize = luaZ_sizebuffer(&g->buff) / 2;
+    luaZ_resizebuffer(L, &g->buff, newsize);
+  }
+}
+
+
+static void GCTM (lua_State *L) {
+  global_State *g = G(L);
+  GCObject *o = g->tmudata->gch.next;  /* get first element */
+  Udata *udata = rawgco2u(o);
+  const TValue *tm;
+  /* remove udata from `tmudata' */
+  if (o == g->tmudata)  /* last element? */
+    g->tmudata = NULL;
+  else
+    g->tmudata->gch.next = udata->uv.next;
+  udata->uv.next = g->mainthread->next;  /* return it to `root' list */
+  g->mainthread->next = o;
+  makewhite(g, o);
+  tm = fasttm(L, udata->uv.metatable, TM_GC);
+  if (tm != NULL) {
+    lu_byte oldah = L->allowhook;
+    lu_mem oldt = g->GCthreshold;
+    L->allowhook = 0;  /* stop debug hooks during GC tag method */
+    g->GCthreshold = 2*g->totalbytes;  /* avoid GC steps */
+    setobj2s(L, L->top, tm);
+    setuvalue(L, L->top+1, udata);
+    L->top += 2;
+    luaD_call(L, L->top - 2, 0);
+    L->allowhook = oldah;  /* restore hooks */
+    g->GCthreshold = oldt;  /* restore threshold */
+  }
+}
+
+
+/*
+** Call all GC tag methods
+*/
+void luaC_callGCTM (lua_State *L) {
+  while (G(L)->tmudata)
+    GCTM(L);
+}
+
+
+void luaC_freeall (lua_State *L) {
+  global_State *g = G(L);
+  int i;
+  g->currentwhite = WHITEBITS | bitmask(SFIXEDBIT);  /* mask to collect all elements */
+  sweepwholelist(L, &g->rootgc);
+  for (i = 0; i < g->strt.size; i++)  /* free all string lists */
+    sweepwholelist(L, &g->strt.hash[i]);
+}
+
+
+static void markmt (global_State *g) {
+  int i;
+  for (i=0; i<NUM_TAGS; i++)
+    if (g->mt[i]) markobject(g, g->mt[i]);
+}
+
+
+/* mark root set */
+static void markroot (lua_State *L) {
+  global_State *g = G(L);
+  g->gray = NULL;
+  g->grayagain = NULL;
+  g->weak = NULL;
+  markobject(g, g->mainthread);
+  /* make global table be traversed before main stack */
+  markvalue(g, gt(g->mainthread));
+  markvalue(g, registry(L));
+  markmt(g);
+  g->gcstate = GCSpropagate;
+}
+
+
+static void remarkupvals (global_State *g) {
+  UpVal *uv;
+  for (uv = g->uvhead.u.l.next; uv != &g->uvhead; uv = uv->u.l.next) {
+    lua_assert(uv->u.l.next->u.l.prev == uv && uv->u.l.prev->u.l.next == uv);
+    if (isgray(obj2gco(uv)))
+      markvalue(g, uv->v);
+  }
+}
+
+
+static void atomic (lua_State *L) {
+  global_State *g = G(L);
+  size_t udsize;  /* total size of userdata to be finalized */
+  /* remark occasional upvalues of (maybe) dead threads */
+  remarkupvals(g);
+  /* traverse objects cautch by write barrier and by 'remarkupvals' */
+  propagateall(g);
+  /* remark weak tables */
+  g->gray = g->weak;
+  g->weak = NULL;
+  lua_assert(!iswhite(obj2gco(g->mainthread)));
+  markobject(g, L);  /* mark running thread */
+  markmt(g);  /* mark basic metatables (again) */
+  propagateall(g);
+  /* remark gray again */
+  g->gray = g->grayagain;
+  g->grayagain = NULL;
+  propagateall(g);
+  udsize = luaC_separateudata(L, 0);  /* separate userdata to be finalized */
+  marktmu(g);  /* mark `preserved' userdata */
+  propagateall(g);  /* remark, to propagate `preserveness' */
+  cleartable(g->weak);  /* remove collected objects from weak tables */
+  /* flip current white */
+  g->currentwhite = cast(lu_byte, otherwhite(g));
+  g->sweepstrgc = 0;
+  g->sweepgc = &g->rootgc;
+  g->gcstate = GCSsweepstring;
+  g->estimate = g->totalbytes - udsize;  /* first estimate */
+}
+
+
+static l_mem singlestep (lua_State *L) {
+  global_State *g = G(L);
+  /*lua_checkmemory(L);*/
+  switch (g->gcstate) {
+    case GCSpause: {
+      markroot(L);  /* start a new collection */
+      return 0;
+    }
+    case GCSpropagate: {
+      if (g->gray)
+        return propagatemark(g);
+      else {  /* no more `gray' objects */
+        atomic(L);  /* finish mark phase */
+        return 0;
+      }
+    }
+    case GCSsweepstring: {
+      lu_mem old = g->totalbytes;
+      sweepwholelist(L, &g->strt.hash[g->sweepstrgc++]);
+      if (g->sweepstrgc >= g->strt.size)  /* nothing more to sweep? */
+        g->gcstate = GCSsweep;  /* end sweep-string phase */
+      lua_assert(old >= g->totalbytes);
+      g->estimate -= old - g->totalbytes;
+      return GCSWEEPCOST;
+    }
+    case GCSsweep: {
+      lu_mem old = g->totalbytes;
+      g->sweepgc = sweeplist(L, g->sweepgc, GCSWEEPMAX);
+      if (*g->sweepgc == NULL) {  /* nothing more to sweep? */
+        checkSizes(L);
+        g->gcstate = GCSfinalize;  /* end sweep phase */
+      }
+      lua_assert(old >= g->totalbytes);
+      g->estimate -= old - g->totalbytes;
+      return GCSWEEPMAX*GCSWEEPCOST;
+    }
+    case GCSfinalize: {
+      if (g->tmudata) {
+        GCTM(L);
+        return GCFINALIZECOST;
+      }
+      else {
+        g->gcstate = GCSpause;  /* end collection */
+        g->gcdept = 0;
+        return 0;
+      }
+    }
+    default: lua_assert(0); return 0;
+  }
+}
+
+
+void luaC_step (lua_State *L) {
+  global_State *g = G(L);
+  l_mem lim = (GCSTEPSIZE/100) * g->gcstepmul;
+  if (lim == 0)
+    lim = (MAX_LUMEM-1)/2;  /* no limit */
+  g->gcdept += g->totalbytes - g->GCthreshold;
+  do {
+    lim -= singlestep(L);
+    if (g->gcstate == GCSpause)
+      break;
+  } while (lim > 0);
+  if (g->gcstate != GCSpause) {
+    if (g->gcdept < GCSTEPSIZE)
+      g->GCthreshold = g->totalbytes + GCSTEPSIZE;  /* - lim/g->gcstepmul;*/
+    else {
+      g->gcdept -= GCSTEPSIZE;
+      g->GCthreshold = g->totalbytes;
+    }
+  }
+  else {
+    lua_assert(g->totalbytes >= g->estimate);
+    setthreshold(g);
+  }
+}
+
+
+void luaC_fullgc (lua_State *L) {
+  global_State *g = G(L);
+  if (g->gcstate <= GCSpropagate) {
+    /* reset sweep marks to sweep all elements (returning them to white) */
+    g->sweepstrgc = 0;
+    g->sweepgc = &g->rootgc;
+    /* reset other collector lists */
+    g->gray = NULL;
+    g->grayagain = NULL;
+    g->weak = NULL;
+    g->gcstate = GCSsweepstring;
+  }
+  lua_assert(g->gcstate != GCSpause && g->gcstate != GCSpropagate);
+  /* finish any pending sweep phase */
+  while (g->gcstate != GCSfinalize) {
+    lua_assert(g->gcstate == GCSsweepstring || g->gcstate == GCSsweep);
+    singlestep(L);
+  }
+  markroot(L);
+  while (g->gcstate != GCSpause) {
+    singlestep(L);
+  }
+  setthreshold(g);
+}
+
+
+void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v) {
+  global_State *g = G(L);
+  lua_assert(isblack(o) && iswhite(v) && !isdead(g, v) && !isdead(g, o));
+  lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
+  lua_assert(ttype(&o->gch) != LUA_TTABLE);
+  /* must keep invariant? */
+  if (g->gcstate == GCSpropagate)
+    reallymarkobject(g, v);  /* restore invariant */
+  else  /* don't mind */
+    makewhite(g, o);  /* mark as white just to avoid other barriers */
+}
+
+
+void luaC_barrierback (lua_State *L, Table *t) {
+  global_State *g = G(L);
+  GCObject *o = obj2gco(t);
+  lua_assert(isblack(o) && !isdead(g, o));
+  lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
+  black2gray(o);  /* make table gray (again) */
+  t->gclist = g->grayagain;
+  g->grayagain = o;
+}
+
+
+void luaC_link (lua_State *L, GCObject *o, lu_byte tt) {
+  global_State *g = G(L);
+  o->gch.next = g->rootgc;
+  g->rootgc = o;
+  o->gch.marked = luaC_white(g);
+  o->gch.tt = tt;
+}
+
+
+void luaC_linkupval (lua_State *L, UpVal *uv) {
+  global_State *g = G(L);
+  GCObject *o = obj2gco(uv);
+  o->gch.next = g->rootgc;  /* link upvalue into `rootgc' list */
+  g->rootgc = o;
+  if (isgray(o)) { 
+    if (g->gcstate == GCSpropagate) {
+      gray2black(o);  /* closed upvalues need barrier */
+      luaC_barrier(L, uv, uv->v);
+    }
+    else {  /* sweep phase: sweep it (turning it into white) */
+      makewhite(g, o);
+      lua_assert(g->gcstate != GCSfinalize && g->gcstate != GCSpause);
+    }
+  }
+}
+

lgc.h

@@ -0,0 +1,110 @@
+/*
+** $Id: lgc.h,v 2.14 2005/06/07 18:53:45 roberto Exp roberto $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lgc_h
+#define lgc_h
+
+
+#include "lobject.h"
+
+
+/*
+** Possible states of the Garbage Collector
+*/
+#define GCSpause	0
+#define GCSpropagate	1
+#define GCSsweepstring	2
+#define GCSsweep	3
+#define GCSfinalize	4
+
+
+/*
+** some userful bit tricks
+*/
+#define resetbits(x,m)	((x) &= cast(lu_byte, ~(m)))
+#define setbits(x,m)	((x) |= (m))
+#define testbits(x,m)	((x) & (m))
+#define bitmask(b)	(1<<(b))
+#define bit2mask(b1,b2)	(bitmask(b1) | bitmask(b2))
+#define l_setbit(x,b)	setbits(x, bitmask(b))
+#define resetbit(x,b)	resetbits(x, bitmask(b))
+#define testbit(x,b)	testbits(x, bitmask(b))
+#define set2bits(x,b1,b2)	setbits(x, (bit2mask(b1, b2)))
+#define reset2bits(x,b1,b2)	resetbits(x, (bit2mask(b1, b2)))
+#define test2bits(x,b1,b2)	testbits(x, (bit2mask(b1, b2)))
+
+
+
+/*
+** Layout for bit use in `marked' field:
+** bit 0 - object is white (type 0)
+** bit 1 - object is white (type 1)
+** bit 2 - object is black
+** bit 3 - for userdata: has been finalized
+** bit 3 - for tables: has weak keys
+** bit 4 - for tables: has weak values
+** bit 5 - object is fixed (should not be collected)
+** bit 6 - object is "super" fixed (only the main thread)
+*/
+
+
+#define WHITE0BIT	0
+#define WHITE1BIT	1
+#define BLACKBIT	2
+#define FINALIZEDBIT	3
+#define KEYWEAKBIT	3
+#define VALUEWEAKBIT	4
+#define FIXEDBIT	5
+#define SFIXEDBIT	6
+#define WHITEBITS	bit2mask(WHITE0BIT, WHITE1BIT)
+
+
+#define iswhite(x)      test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
+#define isblack(x)      testbit((x)->gch.marked, BLACKBIT)
+#define isgray(x)	(!isblack(x) && !iswhite(x))
+
+#define otherwhite(g)	(g->currentwhite ^ WHITEBITS)
+#define isdead(g,v)	((v)->gch.marked & otherwhite(g) & WHITEBITS)
+
+#define changewhite(x)	((x)->gch.marked ^= WHITEBITS)
+#define gray2black(x)	l_setbit((x)->gch.marked, BLACKBIT)
+
+#define valiswhite(x)	(iscollectable(x) && iswhite(gcvalue(x)))
+
+#define luaC_white(g)	cast(lu_byte, (g)->currentwhite & WHITEBITS)
+
+
+#define luaC_checkGC(L) { \
+  condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \
+  if (G(L)->totalbytes >= G(L)->GCthreshold) \
+	luaC_step(L); }
+
+
+#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p)))  \
+	luaC_barrierf(L,obj2gco(p),gcvalue(v)); }
+
+#define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t)))  \
+	luaC_barrierback(L,t); }
+
+#define luaC_objbarrier(L,p,o)  \
+	{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
+		luaC_barrierf(L,obj2gco(p),obj2gco(o)); }
+
+#define luaC_objbarriert(L,t,o)  \
+   { if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); }
+
+LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all);
+LUAI_FUNC void luaC_callGCTM (lua_State *L);
+LUAI_FUNC void luaC_freeall (lua_State *L);
+LUAI_FUNC void luaC_step (lua_State *L);
+LUAI_FUNC void luaC_fullgc (lua_State *L);
+LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt);
+LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv);
+LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v);
+LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t);
+
+
+#endif

linit.c

@@ -0,0 +1,38 @@
+/*
+** $Id: linit.c,v 1.12 2005/08/10 18:06:58 roberto Exp roberto $
+** Initialization of libraries for lua.c
+** See Copyright Notice in lua.h
+*/
+
+
+#define linit_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lualib.h"
+#include "lauxlib.h"
+
+
+static const luaL_Reg lualibs[] = {
+  {"", luaopen_base},
+  {LUA_TABLIBNAME, luaopen_table},
+  {LUA_IOLIBNAME, luaopen_io},
+  {LUA_OSLIBNAME, luaopen_os},
+  {LUA_STRLIBNAME, luaopen_string},
+  {LUA_MATHLIBNAME, luaopen_math},
+  {LUA_DBLIBNAME, luaopen_debug},
+  {LUA_LOADLIBNAME, luaopen_package},
+  {NULL, NULL}
+};
+
+
+LUALIB_API void luaL_openlibs (lua_State *L) {
+  const luaL_Reg *lib = lualibs;
+  for (; lib->func; lib++) {
+    lua_pushcfunction(L, lib->func);
+    lua_pushstring(L, lib->name);
+    lua_call(L, 1, 0);
+  }
+}
+

liolib.c

@@ -0,0 +1,531 @@
+/*
+** $Id: liolib.c,v 2.66 2005/08/17 19:05:04 roberto Exp roberto $
+** Standard I/O (and system) library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define liolib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+
+#define IO_INPUT	1
+#define IO_OUTPUT	2
+
+
+static const char *const fnames[] = {"input", "output"};
+
+
+static int pushresult (lua_State *L, int i, const char *filename) {
+  if (i) {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+  else {
+    lua_pushnil(L);
+    if (filename)
+      lua_pushfstring(L, "%s: %s", filename, strerror(errno));
+    else
+      lua_pushfstring(L, "%s", strerror(errno));
+    lua_pushinteger(L, errno);
+    return 3;
+  }
+}
+
+
+static void fileerror (lua_State *L, int arg, const char *filename) {
+  lua_pushfstring(L, "%s: %s", filename, strerror(errno));
+  luaL_argerror(L, arg, lua_tostring(L, -1));
+}
+
+
+#define topfile(L)	((FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE))
+
+
+static int io_type (lua_State *L) {
+  void *ud;
+  luaL_checkany(L, 1);
+  ud = lua_touserdata(L, 1);
+  lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE);
+  if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1))
+    lua_pushnil(L);  /* not a file */
+  else if (*((FILE **)ud) == NULL)
+    lua_pushliteral(L, "closed file");
+  else
+    lua_pushliteral(L, "file");
+  return 1;
+}
+
+
+static FILE *tofile (lua_State *L) {
+  FILE **f = topfile(L);
+  if (*f == NULL)
+    luaL_error(L, "attempt to use a closed file");
+  return *f;
+}
+
+
+
+/*
+** When creating file handles, always creates a `closed' file handle
+** before opening the actual file; so, if there is a memory error, the
+** file is not left opened.
+*/
+static FILE **newfile (lua_State *L) {
+  FILE **pf = (FILE **)lua_newuserdata(L, sizeof(FILE *));
+  *pf = NULL;  /* file handle is currently `closed' */
+  luaL_getmetatable(L, LUA_FILEHANDLE);
+  lua_setmetatable(L, -2);
+  return pf;
+}
+
+
+/*
+** this function has a separated environment, which defines the
+** correct __close for 'popen' files
+*/
+static int io_pclose (lua_State *L) {
+  FILE **p = topfile(L);
+  int ok = lua_pclose(L, *p);
+  if (ok) *p = NULL;
+  return pushresult(L, ok, NULL);
+}
+
+
+static int io_fclose (lua_State *L) {
+  FILE **p = topfile(L);
+  int ok = (fclose(*p) == 0);
+  if (ok) *p = NULL;
+  return pushresult(L, ok, NULL);
+}
+
+
+static int aux_close (lua_State *L) {
+  lua_getfenv(L, 1);
+  lua_getfield(L, -1, "__close");
+  return (lua_tocfunction(L, -1))(L);
+}
+
+
+static int io_close (lua_State *L) {
+  if (lua_isnone(L, 1))
+    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT);
+  tofile(L);  /* make sure argument is a file */
+  return aux_close(L);
+}
+
+
+static int io_gc (lua_State *L) {
+  FILE *f = *topfile(L);
+  /* ignore closed files and standard files */
+  if (f != NULL && f != stdin && f != stdout && f != stderr)
+    aux_close(L);
+  return 0;
+}
+
+
+static int io_tostring (lua_State *L) {
+  FILE *f = *topfile(L);
+  if (f == NULL)
+    lua_pushstring(L, "file (closed)");
+  else
+    lua_pushfstring(L, "file (%p)", f);
+  return 1;
+}
+
+
+static int io_open (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  FILE **pf = newfile(L);
+  *pf = fopen(filename, mode);
+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+}
+
+
+static int io_popen (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  const char *mode = luaL_optstring(L, 2, "r");
+  FILE **pf = newfile(L);
+  *pf = lua_popen(L, filename, mode);
+  return (*pf == NULL) ? pushresult(L, 0, filename) : 1;
+}
+
+
+static int io_tmpfile (lua_State *L) {
+  FILE **pf = newfile(L);
+  *pf = tmpfile();
+  return (*pf == NULL) ? pushresult(L, 0, NULL) : 1;
+}
+
+
+static FILE *getiofile (lua_State *L, int findex) {
+  FILE *f;
+  lua_rawgeti(L, LUA_ENVIRONINDEX, findex);
+  f = *(FILE **)lua_touserdata(L, -1);
+  if (f == NULL)
+    luaL_error(L, "standard %s file is closed", fnames[findex - 1]);
+  return f;
+}
+
+
+static int g_iofile (lua_State *L, int f, const char *mode) {
+  if (!lua_isnoneornil(L, 1)) {
+    const char *filename = lua_tostring(L, 1);
+    if (filename) {
+      FILE **pf = newfile(L);
+      *pf = fopen(filename, mode);
+      if (*pf == NULL)
+        fileerror(L, 1, filename);
+    }
+    else {
+      tofile(L);  /* check that it's a valid file handle */
+      lua_pushvalue(L, 1);
+    }
+    lua_rawseti(L, LUA_ENVIRONINDEX, f);
+  }
+  /* return current value */
+  lua_rawgeti(L, LUA_ENVIRONINDEX, f);
+  return 1;
+}
+
+
+static int io_input (lua_State *L) {
+  return g_iofile(L, IO_INPUT, "r");
+}
+
+
+static int io_output (lua_State *L) {
+  return g_iofile(L, IO_OUTPUT, "w");
+}
+
+
+static int io_readline (lua_State *L);
+
+
+static void aux_lines (lua_State *L, int idx, int toclose) {
+  lua_pushvalue(L, idx);
+  lua_pushboolean(L, toclose);  /* close/not close file when finished */
+  lua_pushcclosure(L, io_readline, 2);
+}
+
+
+static int f_lines (lua_State *L) {
+  tofile(L);  /* check that it's a valid file handle */
+  aux_lines(L, 1, 0);
+  return 1;
+}
+
+
+static int io_lines (lua_State *L) {
+  if (lua_isnoneornil(L, 1)) {  /* no arguments? */
+    /* will iterate over default input */
+    lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT);
+    return f_lines(L);
+  }
+  else {
+    const char *filename = luaL_checkstring(L, 1);
+    FILE **pf = newfile(L);
+    *pf = fopen(filename, "r");
+    if (*pf == NULL)
+      fileerror(L, 1, filename);
+    aux_lines(L, lua_gettop(L), 1);
+    return 1;
+  }
+}
+
+
+/*
+** {======================================================
+** READ
+** =======================================================
+*/
+
+
+static int read_number (lua_State *L, FILE *f) {
+  lua_Number d;
+  if (fscanf(f, LUA_NUMBER_SCAN, &d) == 1) {
+    lua_pushnumber(L, d);
+    return 1;
+  }
+  else return 0;  /* read fails */
+}
+
+
+static int test_eof (lua_State *L, FILE *f) {
+  int c = getc(f);
+  ungetc(c, f);
+  lua_pushlstring(L, NULL, 0);
+  return (c != EOF);
+}
+
+
+static int read_line (lua_State *L, FILE *f) {
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (;;) {
+    size_t l;
+    char *p = luaL_prepbuffer(&b);
+    if (fgets(p, LUAL_BUFFERSIZE, f) == NULL) {  /* eof? */
+      luaL_pushresult(&b);  /* close buffer */
+      return (lua_strlen(L, -1) > 0);  /* check whether read something */
+    }
+    l = strlen(p);
+    if (p[l-1] != '\n')
+      luaL_addsize(&b, l);
+    else {
+      luaL_addsize(&b, l - 1);  /* do not include `eol' */
+      luaL_pushresult(&b);  /* close buffer */
+      return 1;  /* read at least an `eol' */
+    }
+  }
+}
+
+
+static int read_chars (lua_State *L, FILE *f, size_t n) {
+  size_t rlen;  /* how much to read */
+  size_t nr;  /* number of chars actually read */
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  rlen = LUAL_BUFFERSIZE;  /* try to read that much each time */
+  do {
+    char *p = luaL_prepbuffer(&b);
+    if (rlen > n) rlen = n;  /* cannot read more than asked */
+    nr = fread(p, sizeof(char), rlen, f);
+    luaL_addsize(&b, nr);
+    n -= nr;  /* still have to read `n' chars */
+  } while (n > 0 && nr == rlen);  /* until end of count or eof */
+  luaL_pushresult(&b);  /* close buffer */
+  return (n == 0 || lua_strlen(L, -1) > 0);
+}
+
+
+static int g_read (lua_State *L, FILE *f, int first) {
+  int nargs = lua_gettop(L) - 1;
+  int success;
+  int n;
+  clearerr(f);
+  if (nargs == 0) {  /* no arguments? */
+    success = read_line(L, f);
+    n = first+1;  /* to return 1 result */
+  }
+  else {  /* ensure stack space for all results and for auxlib's buffer */
+    luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
+    success = 1;
+    for (n = first; nargs-- && success; n++) {
+      if (lua_type(L, n) == LUA_TNUMBER) {
+        size_t l = (size_t)lua_tointeger(L, n);
+        success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
+      }
+      else {
+        const char *p = lua_tostring(L, n);
+        luaL_argcheck(L, p && p[0] == '*', n, "invalid option");
+        switch (p[1]) {
+          case 'n':  /* number */
+            success = read_number(L, f);
+            break;
+          case 'l':  /* line */
+            success = read_line(L, f);
+            break;
+          case 'a':  /* file */
+            read_chars(L, f, ~((size_t)0));  /* read MAX_SIZE_T chars */
+            success = 1; /* always success */
+            break;
+          default:
+            return luaL_argerror(L, n, "invalid format");
+        }
+      }
+    }
+  }
+  if (ferror(f))
+    return pushresult(L, 0, NULL);
+  if (!success) {
+    lua_pop(L, 1);  /* remove last result */
+    lua_pushnil(L);  /* push nil instead */
+  }
+  return n - first;
+}
+
+
+static int io_read (lua_State *L) {
+  return g_read(L, getiofile(L, IO_INPUT), 1);
+}
+
+
+static int f_read (lua_State *L) {
+  return g_read(L, tofile(L), 2);
+}
+
+
+static int io_readline (lua_State *L) {
+  FILE *f = *(FILE **)lua_touserdata(L, lua_upvalueindex(1));
+  int sucess;
+  if (f == NULL)  /* file is already closed? */
+    luaL_error(L, "file is already closed");
+  sucess = read_line(L, f);
+  if (ferror(f))
+    return luaL_error(L, "%s", strerror(errno));
+  if (sucess) return 1;
+  else {  /* EOF */
+    if (lua_toboolean(L, lua_upvalueindex(2))) {  /* generator created file? */
+      lua_settop(L, 0);
+      lua_pushvalue(L, lua_upvalueindex(1));
+      aux_close(L);  /* close it */
+    }
+    return 0;
+  }
+}
+
+/* }====================================================== */
+
+
+static int g_write (lua_State *L, FILE *f, int arg) {
+  int nargs = lua_gettop(L) - 1;
+  int status = 1;
+  for (; nargs--; arg++) {
+    if (lua_type(L, arg) == LUA_TNUMBER) {
+      /* optimization: could be done exactly as for strings */
+      status = status &&
+          fprintf(f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
+    }
+    else {
+      size_t l;
+      const char *s = luaL_checklstring(L, arg, &l);
+      status = status && (fwrite(s, sizeof(char), l, f) == l);
+    }
+  }
+  return pushresult(L, status, NULL);
+}
+
+
+static int io_write (lua_State *L) {
+  return g_write(L, getiofile(L, IO_OUTPUT), 1);
+}
+
+
+static int f_write (lua_State *L) {
+  return g_write(L, tofile(L), 2);
+}
+
+
+static int f_seek (lua_State *L) {
+  static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
+  static const char *const modenames[] = {"set", "cur", "end", NULL};
+  FILE *f = tofile(L);
+  int op = luaL_checkoption(L, 2, "cur", modenames);
+  lua_Integer offset = luaL_optinteger(L, 3, 0);
+  op = fseek(f, offset, mode[op]);
+  if (op)
+    return pushresult(L, 0, NULL);  /* error */
+  else {
+    lua_pushinteger(L, ftell(f));
+    return 1;
+  }
+}
+
+
+static int f_setvbuf (lua_State *L) {
+  static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
+  static const char *const modenames[] = {"no", "full", "line", NULL};
+  FILE *f = tofile(L);
+  int op = luaL_checkoption(L, 2, NULL, modenames);
+  lua_Integer sz = luaL_optinteger(L, 3, BUFSIZ);
+  int res = setvbuf(f, NULL, mode[op], sz);
+  return pushresult(L, res == 0, NULL);
+}
+
+
+
+static int io_flush (lua_State *L) {
+  return pushresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
+}
+
+
+static int f_flush (lua_State *L) {
+  return pushresult(L, fflush(tofile(L)) == 0, NULL);
+}
+
+
+static const luaL_Reg iolib[] = {
+  {"close", io_close},
+  {"flush", io_flush},
+  {"input", io_input},
+  {"lines", io_lines},
+  {"open", io_open},
+  {"output", io_output},
+  {"popen", io_popen},
+  {"read", io_read},
+  {"tmpfile", io_tmpfile},
+  {"type", io_type},
+  {"write", io_write},
+  {NULL, NULL}
+};
+
+
+static const luaL_Reg flib[] = {
+  {"close", io_close},
+  {"flush", f_flush},
+  {"lines", f_lines},
+  {"read", f_read},
+  {"seek", f_seek},
+  {"setvbuf", f_setvbuf},
+  {"write", f_write},
+  {"__gc", io_gc},
+  {"__tostring", io_tostring},
+  {NULL, NULL}
+};
+
+
+static void createmeta (lua_State *L) {
+  luaL_newmetatable(L, LUA_FILEHANDLE);  /* create metatable for file handles */
+  lua_pushvalue(L, -1);  /* push metatable */
+  lua_setfield(L, -2, "__index");  /* metatable.__index = metatable */
+  luaL_register(L, NULL, flib);  /* file methods */
+}
+
+
+static void createstdfile (lua_State *L, FILE *f, int k, const char *fname) {
+  *newfile(L) = f;
+  if (k > 0) {
+    lua_pushvalue(L, -1);
+    lua_rawseti(L, LUA_ENVIRONINDEX, k);
+  }
+  lua_setfield(L, -2, fname);
+}
+
+
+LUALIB_API int luaopen_io (lua_State *L) {
+  createmeta(L);
+  /* create new (private) environment */
+  lua_newtable(L);
+  lua_replace(L, LUA_ENVIRONINDEX);
+  /* open library */
+  luaL_register(L, LUA_IOLIBNAME, iolib);
+  /* create (and set) default files */
+  createstdfile(L, stdin, IO_INPUT, "stdin");
+  createstdfile(L, stdout, IO_OUTPUT, "stdout");
+  createstdfile(L, stderr, 0, "stderr");
+  /* create environment for 'popen' */
+  lua_getfield(L, -1, "popen");
+  lua_newtable(L);
+  lua_pushcfunction(L, io_pclose);
+  lua_setfield(L, -2, "__close");
+  lua_setfenv(L, -2);
+  lua_pop(L, 1);  /* pop 'popen' */
+  /* set default close function */
+  lua_pushcfunction(L, io_fclose);
+  lua_setfield(L, LUA_ENVIRONINDEX, "__close");
+  return 1;
+}
+

llex.c

@@ -0,0 +1,430 @@
+/*
+** $Id: llex.c,v 2.11 2005/05/16 21:19:00 roberto Exp roberto $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <string.h>
+
+#define llex_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "llex.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lzio.h"
+
+
+
+#define next(ls) (ls->current = zgetc(ls->z))
+
+
+
+
+#define currIsNewline(ls)	(ls->current == '\n' || ls->current == '\r')
+
+
+/* ORDER RESERVED */
+const char *const luaX_tokens [] = {
+    "and", "break", "do", "else", "elseif",
+    "end", "false", "for", "function", "if",
+    "in", "local", "nil", "not", "or", "repeat",
+    "return", "then", "true", "until", "while",
+    "..", "...", "==", ">=", "<=", "~=",
+    "<number>", "<name>", "<string>", "<eof>",
+    NULL
+};
+
+
+#define save_and_next(ls) (save(ls, ls->current), next(ls))
+
+
+static void save (LexState *ls, int c) {
+  Mbuffer *b = ls->buff;
+  if (b->n + 1 > b->buffsize) {
+    size_t newsize;
+    if (b->buffsize >= MAX_SIZET/2)
+      luaX_lexerror(ls, "lexical element too long", 0);
+    newsize = b->buffsize * 2;
+    luaZ_resizebuffer(ls->L, b, newsize);
+  }
+  b->buffer[b->n++] = cast(char, c);
+}
+
+
+void luaX_init (lua_State *L) {
+  int i;
+  for (i=0; i<NUM_RESERVED; i++) {
+    TString *ts = luaS_new(L, luaX_tokens[i]);
+    luaS_fix(ts);  /* reserved words are never collected */
+    lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
+    ts->tsv.reserved = cast(lu_byte, i+1);  /* reserved word */
+  }
+}
+
+
+#define MAXSRC          80
+
+
+const char *luaX_token2str (LexState *ls, int token) {
+  if (token < FIRST_RESERVED) {
+    lua_assert(token == cast(unsigned char, token));
+    return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) :
+                              luaO_pushfstring(ls->L, "%c", token);
+  }
+  else
+    return luaX_tokens[token-FIRST_RESERVED];
+}
+
+
+static const char *txtToken (LexState *ls, int token) {
+  switch (token) {
+    case TK_NAME:
+    case TK_STRING:
+    case TK_NUMBER:
+      save(ls, '\0');
+      return luaZ_buffer(ls->buff);
+    default:
+      return luaX_token2str(ls, token);
+  }
+}
+
+
+void luaX_lexerror (LexState *ls, const char *msg, int token) {
+  char buff[MAXSRC];
+  luaO_chunkid(buff, getstr(ls->source), MAXSRC);
+  msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
+  if (token)
+    luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token));
+  luaD_throw(ls->L, LUA_ERRSYNTAX);
+}
+
+
+void luaX_syntaxerror (LexState *ls, const char *msg) {
+  luaX_lexerror(ls, msg, ls->t.token);
+}
+
+
+TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
+  lua_State *L = ls->L;
+  TString *ts = luaS_newlstr(L, str, l);
+  TValue *o = luaH_setstr(L, ls->fs->h, ts);  /* entry for `str' */
+  if (ttisnil(o))
+    setbvalue(o, 1);  /* make sure `str' will not be collected */
+  return ts;
+}
+
+
+static void inclinenumber (LexState *ls) {
+  int old = ls->current;
+  lua_assert(currIsNewline(ls));
+  next(ls);  /* skip `\n' or `\r' */
+  if (currIsNewline(ls) && ls->current != old)
+    next(ls);  /* skip `\n\r' or `\r\n' */
+  if (++ls->linenumber >= MAX_INT)
+    luaX_syntaxerror(ls, "chunk has too many lines");
+}
+
+
+void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
+  ls->L = L;
+  ls->lookahead.token = TK_EOS;  /* no look-ahead token */
+  ls->z = z;
+  ls->fs = NULL;
+  ls->linenumber = 1;
+  ls->lastline = 1;
+  ls->source = source;
+  luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
+  next(ls);  /* read first char */
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALYZER
+** =======================================================
+*/
+
+
+
+
+/* LUA_NUMBER */
+static void read_numeral (LexState *ls, SemInfo *seminfo) {
+  while (isdigit(ls->current)) {
+    save_and_next(ls);
+  }
+  if (ls->current == '.') {
+    save_and_next(ls);
+    if (ls->current == '.') {
+      save_and_next(ls);
+      luaX_lexerror(ls,
+                 "ambiguous syntax (decimal point x string concatenation)",
+                 TK_NUMBER);
+    }
+  }
+  while (isdigit(ls->current)) {
+    save_and_next(ls);
+  }
+  if (ls->current == 'e' || ls->current == 'E') {
+    save_and_next(ls);  /* read `E' */
+    if (ls->current == '+' || ls->current == '-')
+      save_and_next(ls);  /* optional exponent sign */
+    while (isdigit(ls->current)) {
+      save_and_next(ls);
+    }
+  }
+  save(ls, '\0');
+  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r))
+    luaX_lexerror(ls, "malformed number", TK_NUMBER);
+}
+
+
+static int skip_sep (LexState *ls) {
+  int count = 0;
+  int s = ls->current;
+  lua_assert(s == '[' || s == ']');
+  save_and_next(ls);
+  while (ls->current == '=') {
+    save_and_next(ls);
+    count++;
+  }
+  return (ls->current == s) ? count : (-count) - 1;
+}
+
+
+static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
+  int cont = 0;
+  (void)(cont);  /* avoid warnings when `cont' is not used */
+  save_and_next(ls);  /* skip 2nd `[' */
+  if (currIsNewline(ls))  /* string starts with a newline? */
+    inclinenumber(ls);  /* skip it */
+  for (;;) {
+    switch (ls->current) {
+      case EOZ:
+        luaX_lexerror(ls, (seminfo) ? "unfinished long string" :
+                                   "unfinished long comment", TK_EOS);
+        break;  /* to avoid warnings */
+#if defined(LUA_COMPAT_LSTR)
+      case '[': {
+        if (skip_sep(ls) == sep) {
+          save_and_next(ls);  /* skip 2nd `[' */
+          cont++;
+#if LUA_COMPAT_LSTR == 1
+          if (sep == 0)
+            luaX_lexerror(ls, "nesting of [[...]] is deprecated", '[');
+#endif
+        }
+        break;
+      }
+#endif
+      case ']': {
+        if (skip_sep(ls) == sep) {
+          save_and_next(ls);  /* skip 2nd `]' */
+#if defined(LUA_COMPAT_LSTR) && LUA_COMPAT_LSTR == 2
+          cont--;
+          if (sep == 0 && cont >= 0) break;
+#endif
+          goto endloop;
+        }
+        break;
+      }
+      case '\n':
+      case '\r': {
+        save(ls, '\n');
+        inclinenumber(ls);
+        if (!seminfo) luaZ_resetbuffer(ls->buff);  /* avoid wasting space */
+        break;
+      }
+      default: {
+        if (seminfo) save_and_next(ls);
+        else next(ls);
+      }
+    }
+  } endloop:
+  if (seminfo)
+    seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + (2 + sep),
+                                     luaZ_bufflen(ls->buff) - 2*(2 + sep));
+}
+
+
+static void read_string (LexState *ls, int del, SemInfo *seminfo) {
+  save_and_next(ls);
+  while (ls->current != del) {
+    switch (ls->current) {
+      case EOZ:
+        luaX_lexerror(ls, "unfinished string", TK_EOS);
+        continue;  /* to avoid warnings */
+      case '\n':
+      case '\r':
+        luaX_lexerror(ls, "unfinished string", TK_STRING);
+        continue;  /* to avoid warnings */
+      case '\\': {
+        int c;
+        next(ls);  /* do not save the `\' */
+        switch (ls->current) {
+          case 'a': c = '\a'; break;
+          case 'b': c = '\b'; break;
+          case 'f': c = '\f'; break;
+          case 'n': c = '\n'; break;
+          case 'r': c = '\r'; break;
+          case 't': c = '\t'; break;
+          case 'v': c = '\v'; break;
+          case '\n':  /* go through */
+          case '\r': save(ls, '\n'); inclinenumber(ls); continue;
+          case EOZ: continue;  /* will raise an error next loop */
+          default: {
+            if (!isdigit(ls->current))
+              save_and_next(ls);  /* handles \\, \", \', and \? */
+            else {  /* \xxx */
+              int i = 0;
+              c = 0;
+              do {
+                c = 10*c + (ls->current-'0');
+                next(ls);
+              } while (++i<3 && isdigit(ls->current));
+              if (c > UCHAR_MAX)
+                luaX_lexerror(ls, "escape sequence too large", TK_STRING);
+              save(ls, c);
+            }
+            continue;
+          }
+        }
+        save(ls, c);
+        next(ls);
+        continue;
+      }
+      default:
+        save_and_next(ls);
+    }
+  }
+  save_and_next(ls);  /* skip delimiter */
+  seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
+                                   luaZ_bufflen(ls->buff) - 2);
+}
+
+
+int luaX_lex (LexState *ls, SemInfo *seminfo) {
+  luaZ_resetbuffer(ls->buff);
+  for (;;) {
+    switch (ls->current) {
+      case '\n':
+      case '\r': {
+        inclinenumber(ls);
+        continue;
+      }
+      case '-': {
+        next(ls);
+        if (ls->current != '-') return '-';
+        /* else is a comment */
+        next(ls);
+        if (ls->current == '[') {
+          int sep = skip_sep(ls);
+          luaZ_resetbuffer(ls->buff);  /* `skip_sep' may dirty the buffer */
+          if (sep >= 0) {
+            read_long_string(ls, NULL, sep);  /* long comment */
+            luaZ_resetbuffer(ls->buff);
+            continue;
+          }
+        }
+        /* else short comment */
+        while (!currIsNewline(ls) && ls->current != EOZ)
+          next(ls);
+        continue;
+      }
+      case '[': {
+        int sep = skip_sep(ls);
+        if (sep >= 0) {
+          read_long_string(ls, seminfo, sep);
+          return TK_STRING;
+        }
+        else if (sep == -1) return '[';
+        else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING);
+      }
+      case '=': {
+        next(ls);
+        if (ls->current != '=') return '=';
+        else { next(ls); return TK_EQ; }
+      }
+      case '<': {
+        next(ls);
+        if (ls->current != '=') return '<';
+        else { next(ls); return TK_LE; }
+      }
+      case '>': {
+        next(ls);
+        if (ls->current != '=') return '>';
+        else { next(ls); return TK_GE; }
+      }
+      case '~': {
+        next(ls);
+        if (ls->current != '=') return '~';
+        else { next(ls); return TK_NE; }
+      }
+      case '"':
+      case '\'': {
+        read_string(ls, ls->current, seminfo);
+        return TK_STRING;
+      }
+      case '.': {
+        save_and_next(ls);
+        if (ls->current == '.') {
+          next(ls);
+          if (ls->current == '.') {
+            next(ls);
+            return TK_DOTS;   /* ... */
+          }
+          else return TK_CONCAT;   /* .. */
+        }
+        else if (!isdigit(ls->current)) return '.';
+        else {
+          read_numeral(ls, seminfo);
+          return TK_NUMBER;
+        }
+      }
+      case EOZ: {
+        return TK_EOS;
+      }
+      default: {
+        if (isspace(ls->current)) {
+          lua_assert(!currIsNewline(ls));
+          next(ls);
+          continue;
+        }
+        else if (isdigit(ls->current)) {
+          read_numeral(ls, seminfo);
+          return TK_NUMBER;
+        }
+        else if (isalpha(ls->current) || ls->current == '_') {
+          /* identifier or reserved word */
+          TString *ts;
+          do {
+            save_and_next(ls);
+          } while (isalnum(ls->current) || ls->current == '_');
+          ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
+                                  luaZ_bufflen(ls->buff));
+          if (ts->tsv.reserved > 0)  /* reserved word? */
+            return ts->tsv.reserved - 1 + FIRST_RESERVED;
+          else {
+            seminfo->ts = ts;
+            return TK_NAME;
+          }
+        }
+        else {
+          int c = ls->current;
+          next(ls);
+          return c;  /* single-char tokens (+ - / ...) */
+        }
+      }
+    }
+  }
+}
+
+#undef next

llex.h

@@ -0,0 +1,79 @@
+/*
+** $Id: llex.h,v 1.54 2005/04/25 19:24:10 roberto Exp roberto $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+#ifndef llex_h
+#define llex_h
+
+#include "lobject.h"
+#include "lzio.h"
+
+
+#define FIRST_RESERVED	257
+
+/* maximum length of a reserved word */
+#define TOKEN_LEN	(sizeof("function")/sizeof(char))
+
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER RESERVED"
+*/
+enum RESERVED {
+  /* terminal symbols denoted by reserved words */
+  TK_AND = FIRST_RESERVED, TK_BREAK,
+  TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
+  TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
+  TK_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_NUMBER,
+  TK_NAME, TK_STRING, TK_EOS
+};
+
+/* number of reserved words */
+#define NUM_RESERVED	(cast(int, TK_WHILE-FIRST_RESERVED+1))
+
+
+/* array with token `names' */
+LUAI_DATA const char *const luaX_tokens [];
+
+
+typedef union {
+  lua_Number r;
+  TString *ts;
+} SemInfo;  /* semantics information */
+
+
+typedef struct Token {
+  int token;
+  SemInfo seminfo;
+} Token;
+
+
+typedef struct LexState {
+  int current;  /* current character (charint) */
+  int linenumber;  /* input line counter */
+  int lastline;  /* line of last token `consumed' */
+  Token t;  /* current token */
+  Token lookahead;  /* look ahead token */
+  struct FuncState *fs;  /* `FuncState' is private to the parser */
+  struct lua_State *L;
+  ZIO *z;  /* input stream */
+  Mbuffer *buff;  /* buffer for tokens */
+  TString *source;  /* current source name */
+} LexState;
+
+
+LUAI_FUNC void luaX_init (lua_State *L);
+LUAI_FUNC void luaX_setinput (lua_State *L, LexState *LS, ZIO *z,
+                              TString *source);
+LUAI_FUNC TString *luaX_newstring (LexState *LS, const char *str, size_t l);
+LUAI_FUNC int luaX_lex (LexState *LS, SemInfo *seminfo);
+LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token);
+LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);
+LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
+
+
+#endif

llimits.h

@@ -0,0 +1,115 @@
+/*
+** $Id: llimits.h,v 1.66 2005/08/04 13:37:10 roberto Exp roberto $
+** Limits, basic types, and some other `installation-dependent' definitions
+** See Copyright Notice in lua.h
+*/
+
+#ifndef llimits_h
+#define llimits_h
+
+
+#include <limits.h>
+#include <stddef.h>
+
+
+#include "lua.h"
+
+
+#define api_check	luai_apicheck
+
+
+typedef LUAI_UINT32 lu_int32;
+
+typedef LUAI_UMEM lu_mem;
+
+typedef LUAI_MEM l_mem;
+
+
+
+/* chars used as small naturals (so that `char' is reserved for characters) */
+typedef unsigned char lu_byte;
+
+
+#define MAX_SIZET	((size_t)(~(size_t)0)-2)
+
+#define MAX_LUMEM	((lu_mem)(~(lu_mem)0)-2)
+
+
+#define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
+
+/*
+** 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))
+
+
+
+/* type to ensure maximum alignment */
+typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
+
+
+/* result of a `usual argument conversion' over lua_Number */
+typedef LUAI_UACNUMBER l_uacNumber;
+
+
+#define check_exp(c,e)	(lua_assert(c), (e))
+
+
+#ifndef UNUSED
+#define UNUSED(x)	((void)(x))	/* to avoid warnings */
+#endif
+
+
+#ifndef cast
+#define cast(t, exp)	((t)(exp))
+#endif
+
+
+
+/*
+** type for virtual-machine instructions
+** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
+*/
+typedef lu_int32 Instruction;
+
+
+
+/* maximum stack for a Lua function */
+#define MAXSTACK	250
+
+
+
+/* minimum size for the string table (must be power of 2) */
+#ifndef MINSTRTABSIZE
+#define MINSTRTABSIZE	32
+#endif
+
+
+/* minimum size for string buffer */
+#ifndef LUA_MINBUFFER
+#define LUA_MINBUFFER	32
+#endif
+
+
+#ifndef lua_lock
+#define lua_lock(L)     ((void) 0) 
+#define lua_unlock(L)   ((void) 0)
+#endif
+
+#ifndef luai_threadyield
+#define luai_threadyield(L)     {lua_unlock(L); lua_lock(L);}
+#endif
+
+
+/*
+** macro to control inclusion of some hard tests on stack reallocation
+*/ 
+#ifndef HARDSTACKTESTS
+#define condhardstacktests(x)	((void)0)
+#else
+#define condhardstacktests(x)	x
+#endif
+
+#endif

lmathlib.c

@@ -0,0 +1,263 @@
+/*
+** $Id: lmathlib.c,v 1.66 2005/08/15 14:12:32 roberto Exp roberto $
+** Standard mathematical library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <math.h>
+
+#define lmathlib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#undef PI
+#define PI (3.14159265358979323846)
+#define RADIANS_PER_DEGREE (PI/180.0)
+
+
+
+static int math_abs (lua_State *L) {
+  lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sin (lua_State *L) {
+  lua_pushnumber(L, sin(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_sinh (lua_State *L) {
+  lua_pushnumber(L, sinh(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_cos (lua_State *L) {
+  lua_pushnumber(L, cos(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_cosh (lua_State *L) {
+  lua_pushnumber(L, cosh(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_tan (lua_State *L) {
+  lua_pushnumber(L, tan(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_tanh (lua_State *L) {
+  lua_pushnumber(L, tanh(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_asin (lua_State *L) {
+  lua_pushnumber(L, asin(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_acos (lua_State *L) {
+  lua_pushnumber(L, acos(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_atan (lua_State *L) {
+  lua_pushnumber(L, atan(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_atan2 (lua_State *L) {
+  lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
+  return 1;
+}
+
+static int math_ceil (lua_State *L) {
+  lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_floor (lua_State *L) {
+  lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_fmod (lua_State *L) {
+  lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
+  return 1;
+}
+
+static int math_modf (lua_State *L) {
+  double ip;
+  double fp = modf(luaL_checknumber(L, 1), &ip);
+  lua_pushnumber(L, ip);
+  lua_pushnumber(L, fp);
+  return 2;
+}
+
+static int math_sqrt (lua_State *L) {
+  lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_pow (lua_State *L) {
+  lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
+  return 1;
+}
+
+static int math_log (lua_State *L) {
+  lua_pushnumber(L, log(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_log10 (lua_State *L) {
+  lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_exp (lua_State *L) {
+  lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
+  return 1;
+}
+
+static int math_deg (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
+  return 1;
+}
+
+static int math_rad (lua_State *L) {
+  lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
+  return 1;
+}
+
+static int math_frexp (lua_State *L) {
+  int e;
+  lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
+  lua_pushinteger(L, e);
+  return 2;
+}
+
+static int math_ldexp (lua_State *L) {
+  lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
+  return 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;
+}
+
+
+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 */
+      int u = luaL_checkint(L, 1);
+      luaL_argcheck(L, 1<=u, 1, "interval is empty");
+      lua_pushnumber(L, floor(r*u)+1);  /* int between 1 and `u' */
+      break;
+    }
+    case 2: {  /* lower and upper limits */
+      int l = luaL_checkint(L, 1);
+      int u = luaL_checkint(L, 2);
+      luaL_argcheck(L, l<=u, 2, "interval is empty");
+      lua_pushnumber(L, floor(r*(u-l+1))+l);  /* int between `l' and `u' */
+      break;
+    }
+    default: return luaL_error(L, "wrong number of arguments");
+  }
+  return 1;
+}
+
+
+static int math_randomseed (lua_State *L) {
+  srand(luaL_checkint(L, 1));
+  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},
+  {"floor", math_floor},
+  {"fmod",   math_fmod},
+  {"frexp", math_frexp},
+  {"ldexp", math_ldexp},
+  {"log10", math_log10},
+  {"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},
+  {NULL, NULL}
+};
+
+
+/*
+** Open math library
+*/
+LUALIB_API int luaopen_math (lua_State *L) {
+  luaL_register(L, LUA_MATHLIBNAME, mathlib);
+  lua_pushnumber(L, PI);
+  lua_setfield(L, -2, "pi");
+  lua_pushnumber(L, HUGE_VAL);
+  lua_setfield(L, -2, "huge");
+#if defined(LUA_COMPAT_MOD)
+  lua_getfield(L, -1, "fmod");
+  lua_setfield(L, -2, "mod");
+#endif
+  return 1;
+}
+

lmem.c

@@ -0,0 +1,102 @@
+/*
+** $Id: lmem.c,v 1.68 2005/01/14 14:21:16 roberto Exp roberto $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stddef.h>
+
+#define lmem_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+
+/*
+** About the realloc function:
+** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
+** (`osize' is the old size, `nsize' is the new size)
+**
+** Lua ensures that (ptr == NULL) iff (osize == 0).
+**
+** * frealloc(ud, NULL, 0, x) creates a new block of size `x'
+**
+** * frealloc(ud, p, x, 0) frees the block `p'
+** (in this specific case, frealloc must return NULL).
+** particularly, frealloc(ud, NULL, 0, 0) does nothing
+** (which is equivalent to free(NULL) in ANSI C)
+**
+** frealloc returns NULL if it cannot create or reallocate the area
+** (any reallocation to an equal or smaller size cannot fail!)
+*/
+
+
+
+#define MINSIZEARRAY	4
+
+
+void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
+                     int limit, const char *errormsg) {
+  void *newblock;
+  int newsize;
+  if (*size >= limit/2) {  /* cannot double it? */
+    if (*size >= limit)  /* cannot grow even a little? */
+      luaG_runerror(L, errormsg);
+    newsize = limit;  /* still have at least one free place */
+  }
+  else {
+    newsize = (*size)*2;
+    if (newsize < MINSIZEARRAY)
+      newsize = MINSIZEARRAY;  /* minimum size */
+  }
+  newblock = luaM_reallocv(L, block, *size, newsize, size_elems);
+  *size = newsize;  /* update only when everything else is OK */
+  return newblock;
+}
+
+
+void *luaM_toobig (lua_State *L) {
+  luaG_runerror(L, "memory allocation error: block too big");
+  return NULL;  /* to avoid warnings */
+}
+
+
+
+/*
+** generic allocation routine.
+*/
+void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
+  global_State *g = G(L);
+  lua_assert((osize == 0) == (block == NULL));
+  block = (*g->frealloc)(g->ud, block, osize, nsize);
+  if (block == NULL && nsize > 0)
+    luaD_throw(L, LUA_ERRMEM);
+  lua_assert((nsize == 0) == (block == NULL));
+  g->totalbytes = (g->totalbytes - osize) + nsize;
+#if 0
+  { /* auxiliar patch to monitor garbage collection */
+    static unsigned long total = 0;  /* our "time" */
+    static lu_mem last = 0;  /* last totalmem that generated an output */
+    static FILE *f = NULL;  /* output file */
+    if (nsize <= osize) total += 1;  /* "time" always grow */
+    else total += (nsize - osize);
+    if ((int)g->totalbytes - (int)last > 1000 ||
+        (int)g->totalbytes - (int)last < -1000) {
+      last = g->totalbytes;
+      if (f == NULL) f = fopen("trace", "w");
+      fprintf(f, "%lu %u %u %u %d\n", total, g->totalbytes, g->GCthreshold,
+                                      g->estimate, g->gcstate);
+    }
+  }
+#endif
+  return block;
+}
+

lmem.h

@@ -0,0 +1,49 @@
+/*
+** $Id: lmem.h,v 1.30 2005/03/18 16:38:02 roberto Exp roberto $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lmem_h
+#define lmem_h
+
+
+#include <stddef.h>
+
+#include "llimits.h"
+#include "lua.h"
+
+#define MEMERRMSG	"not enough memory"
+
+
+#define luaM_reallocv(L,b,on,n,e) \
+	((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
+		luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
+		luaM_toobig(L))
+
+#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, t)   luaM_reallocv(L, (b), n, 0, sizeof(t))
+
+#define luaM_malloc(L,t)	luaM_realloc_(L, NULL, 0, (t))
+#define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))
+#define luaM_newvector(L,n,t) \
+		cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
+
+#define luaM_growvector(L,v,nelems,size,t,limit,e) \
+          if ((nelems)+1 > (size)) \
+            ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
+
+#define luaM_reallocvector(L, v,oldn,n,t) \
+   ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
+
+
+LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
+                                                          size_t size);
+LUAI_FUNC void *luaM_toobig (lua_State *L);
+LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
+                               size_t size_elem, int limit,
+                               const char *errormsg);
+
+#endif
+

loadlib.c

@@ -0,0 +1,655 @@
+/*
+** $Id: loadlib.c,v 1.43 2005/08/31 23:17:29 roberto Exp roberto $
+** Dynamic library loader for Lua
+** See Copyright Notice in lua.h
+**
+** This module contains an implementation of loadlib for Unix systems
+** that have dlfcn, an implementation for Darwin (Mac OS X), an
+** implementation for Windows, and a stub for other systems.
+*/
+
+
+#include <stdlib.h>
+#include <string.h>
+
+
+#define loadlib_c
+#define LUA_LIB
+
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/* environment variables that hold the search path for packages */
+#define LUA_PATH	"LUA_PATH"
+#define LUA_CPATH	"LUA_CPATH"
+
+/* prefix for open functions in C libraries */
+#define LUA_POF		"luaopen_"
+
+/* separator for open functions in C libraries */
+#define LUA_OFSEP	"_"
+
+
+#define LIBPREFIX	"LOADLIB: "
+
+#define POF		LUA_POF
+#define LIB_FAIL	"open"
+
+
+/* error codes for ll_loadfunc */
+#define ERRLIB		1
+#define ERRFUNC		2
+
+#define setprogdir(L)		((void)0)
+
+
+static void ll_unloadlib (void *lib);
+static void *ll_load (lua_State *L, const char *path);
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
+
+
+
+#if defined(LUA_DL_DLOPEN)
+/*
+** {========================================================================
+** This is an implementation of loadlib based on the dlfcn interface.
+** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
+** NetBSD, AIX 4.2, HPUX 11, and  probably most other Unix flavors, at least
+** as an emulation layer on top of native functions.
+** =========================================================================
+*/
+
+#include <dlfcn.h>
+
+static void ll_unloadlib (void *lib) {
+  dlclose(lib);
+}
+
+
+static void *ll_load (lua_State *L, const char *path) {
+  void *lib = dlopen(path, RTLD_NOW);
+  if (lib == NULL) lua_pushstring(L, dlerror());
+  return lib;
+}
+
+
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+  lua_CFunction f = (lua_CFunction)dlsym(lib, sym);
+  if (f == NULL) lua_pushstring(L, dlerror());
+  return f;
+}
+
+/* }====================================================== */
+
+
+
+#elif defined(LUA_DL_DLL)
+/*
+** {======================================================================
+** This is an implementation of loadlib for Windows using native functions.
+** =======================================================================
+*/
+
+#include <windows.h>
+
+
+#undef setprogdir
+
+void setprogdir (lua_State *L) {
+  char buff[MAX_PATH + 1];
+  char *lb;
+  DWORD nsize = sizeof(buff)/sizeof(char);
+  DWORD n = GetModuleFileName(NULL, buff, nsize);
+  if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
+    luaL_error(L, "unable to get ModuleFileName");
+  *lb = '\0';
+  luaL_gsub(L, lua_tostring(L, -1), LUA_EXECDIR, buff);
+  lua_remove(L, -2);  /* remove original string */
+}
+
+
+static void pusherror (lua_State *L) {
+  int error = GetLastError();
+  char buffer[128];
+  if (FormatMessage(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
+      NULL, error, 0, buffer, sizeof(buffer), NULL))
+    lua_pushstring(L, buffer);
+  else
+    lua_pushfstring(L, "system error %d\n", error);
+}
+
+static void ll_unloadlib (void *lib) {
+  FreeLibrary((HINSTANCE)lib);
+}
+
+
+static void *ll_load (lua_State *L, const char *path) {
+  HINSTANCE lib = LoadLibrary(path);
+  if (lib == NULL) pusherror(L);
+  return lib;
+}
+
+
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+  lua_CFunction f = (lua_CFunction)GetProcAddress((HINSTANCE)lib, sym);
+  if (f == NULL) pusherror(L);
+  return f;
+}
+
+/* }====================================================== */
+
+
+
+#elif defined(LUA_DL_DYLD)
+/*
+** {======================================================================
+** Native Mac OS X / Darwin Implementation
+** =======================================================================
+*/
+
+#include <mach-o/dyld.h>
+
+
+/* Mac appends a `_' before C function names */
+#undef POF
+#define POF	"_" LUA_POF
+
+
+static void pusherror (lua_State *L) {
+  const char *err_str;
+  const char *err_file;
+  NSLinkEditErrors err;
+  int err_num;
+  NSLinkEditError(&err, &err_num, &err_file, &err_str);
+  lua_pushstring(L, err_str);
+}
+
+
+static const char *errorfromcode (NSObjectFileImageReturnCode ret) {
+  switch (ret) {
+    case NSObjectFileImageInappropriateFile:
+      return "file is not a bundle";
+    case NSObjectFileImageArch:
+      return "library is for wrong CPU type";
+    case NSObjectFileImageFormat:
+      return "bad format";
+    case NSObjectFileImageAccess:
+      return "cannot access file";
+    case NSObjectFileImageFailure:
+    default:
+      return "unable to load library";
+  }
+}
+
+
+static void ll_unloadlib (void *lib) {
+  NSUnLinkModule((NSModule)lib, NSUNLINKMODULE_OPTION_RESET_LAZY_REFERENCES);
+}
+
+
+static void *ll_load (lua_State *L, const char *path) {
+  NSObjectFileImage img;
+  NSObjectFileImageReturnCode ret;
+  /* this would be a rare case, but prevents crashing if it happens */
+  if(!_dyld_present()) {
+    lua_pushliteral(L, "dyld not present");
+    return NULL;
+  }
+  ret = NSCreateObjectFileImageFromFile(path, &img);
+  if (ret == NSObjectFileImageSuccess) {
+    NSModule mod = NSLinkModule(img, path, NSLINKMODULE_OPTION_PRIVATE |
+                       NSLINKMODULE_OPTION_RETURN_ON_ERROR);
+    NSDestroyObjectFileImage(img);
+    if (mod == NULL) pusherror(L);
+    return mod;
+  }
+  lua_pushstring(L, errorfromcode(ret));
+  return NULL;
+}
+
+
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+  NSSymbol nss = NSLookupSymbolInModule((NSModule)lib, sym);
+  if (nss == NULL) {
+    lua_pushfstring(L, "symbol " LUA_QS " not found", sym);
+    return NULL;
+  }
+  return (lua_CFunction)NSAddressOfSymbol(nss);
+}
+
+/* }====================================================== */
+
+
+
+#else
+/*
+** {======================================================
+** Fallback for other systems
+** =======================================================
+*/
+
+#undef LIB_FAIL
+#define LIB_FAIL	"absent"
+
+
+#if defined(__ELF__) || defined(__sun) || defined(sgi) || defined(__hpux)
+#define DLMSG LUA_QL("loadlib") " not enabled; check your Lua installation"
+#else
+#define DLMSG		LUA_QL("loadlib") " not supported"
+#endif
+
+static void ll_unloadlib (void *lib) {
+  (void)lib;  /* to avoid warnings */
+}
+
+
+static void *ll_load (lua_State *L, const char *path) {
+  (void)path;  /* to avoid warnings */
+  lua_pushliteral(L, DLMSG);
+  return NULL;
+}
+
+
+static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
+  (void)lib; (void)sym;  /* to avoid warnings */
+  lua_pushliteral(L, DLMSG);
+  return NULL;
+}
+
+/* }====================================================== */
+#endif
+
+
+
+static void **ll_register (lua_State *L, const char *path) {
+  void **plib;
+  lua_pushfstring(L, "%s%s", LIBPREFIX, path);
+  lua_gettable(L, LUA_REGISTRYINDEX);  /* check library in registry? */
+  if (!lua_isnil(L, -1))  /* is there an entry? */
+    plib = (void **)lua_touserdata(L, -1);
+  else {  /* no entry yet; create one */
+    lua_pop(L, 1);
+    plib = (void **)lua_newuserdata(L, sizeof(const void *));
+    *plib = NULL;
+    luaL_getmetatable(L, "_LOADLIB");
+    lua_setmetatable(L, -2);
+    lua_pushfstring(L, "%s%s", LIBPREFIX, path);
+    lua_pushvalue(L, -2);
+    lua_settable(L, LUA_REGISTRYINDEX);
+  }
+  return plib;
+}
+
+
+/*
+** __gc tag method: calls library's `ll_unloadlib' function with the lib
+** handle
+*/
+static int gctm (lua_State *L) {
+  void **lib = (void **)luaL_checkudata(L, 1, "_LOADLIB");
+  if (*lib) ll_unloadlib(*lib);
+  *lib = NULL;  /* mark library as closed */
+  return 0;
+}
+
+
+static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
+  void **reg = ll_register(L, path);
+  if (*reg == NULL) *reg = ll_load(L, path);
+  if (*reg == NULL)
+    return ERRLIB;  /* unable to load library */
+  else {
+    lua_CFunction f = ll_sym(L, *reg, sym);
+    if (f == NULL)
+      return ERRFUNC;  /* unable to find function */
+    lua_pushcfunction(L, f);
+    return 0;  /* return function */
+  }
+}
+
+
+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);
+  if (stat == 0)  /* no errors? */
+    return 1;  /* return the loaded function */
+  else {  /* error; error message is on stack top */
+    lua_pushnil(L);
+    lua_insert(L, -2);
+    lua_pushstring(L, (stat == ERRLIB) ?  LIB_FAIL : "init");
+    return 3;  /* return nil, error message, and where */
+  }
+}
+
+
+
+/*
+** {======================================================
+** 'require' function
+** =======================================================
+*/
+
+
+static int readable (const char *filename) {
+  FILE *f = fopen(filename, "r");  /* try to open file */
+  if (f == NULL) return 0;  /* open failed */
+  fclose(f);
+  return 1;
+}
+
+
+static const char *pushnexttemplate (lua_State *L, const char *path) {
+  const char *l;
+  while (*path == *LUA_PATHSEP) path++;  /* skip separators */
+  if (*path == '\0') return NULL;  /* no more templates */
+  l = strchr(path, *LUA_PATHSEP);  /* find next separator */
+  if (l == NULL) l = path + strlen(path);
+  lua_pushlstring(L, path, l - path);  /* template */
+  return l;
+}
+
+
+static const char *findfile (lua_State *L, const char *name,
+                                           const char *pname) {
+  const char *path;
+  name = luaL_gsub(L, name, ".", LUA_DIRSEP);
+  lua_getfield(L, LUA_ENVIRONINDEX, pname);
+  path = lua_tostring(L, -1);
+  if (path == NULL)
+    luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
+  while ((path = pushnexttemplate(L, path)) != NULL) {
+    const char *filename;
+    filename = luaL_gsub(L, lua_tostring(L, -1), LUA_PATH_MARK, name);
+    if (readable(filename))  /* does file exist and is readable? */
+      return filename;  /* return that file name */
+    lua_pop(L, 2);  /* remove path template and file name */ 
+  }
+  return NULL;  /* not found */
+}
+
+
+static void loaderror (lua_State *L) {
+  luaL_error(L, "error loading module " LUA_QS " (%s)",
+                lua_tostring(L, 1), lua_tostring(L, -1));
+}
+
+
+static int loader_Lua (lua_State *L) {
+  const char *filename;
+  const char *name = luaL_checkstring(L, 1);
+  filename = findfile(L, name, "path");
+  if (filename == NULL) return 0;  /* library not found in this path */
+  if (luaL_loadfile(L, filename) != 0)
+    loaderror(L);
+  return 1;  /* library loaded successfully */
+}
+
+
+static const char *mkfuncname (lua_State *L, const char *modname) {
+  const char *funcname;
+  const char *mark = strchr(modname, *LUA_IGMARK);
+  if (mark) modname = mark + 1;
+  funcname = luaL_gsub(L, modname, ".", LUA_OFSEP);
+  funcname = lua_pushfstring(L, POF"%s", funcname);
+  lua_remove(L, -2);  /* remove 'gsub' result */
+  return funcname;
+}
+
+
+static int loader_C (lua_State *L) {
+  const char *funcname;
+  const char *name = luaL_checkstring(L, 1);
+  const char *filename = findfile(L, name, "cpath");
+  if (filename == NULL) return 0;  /* library not found in this path */
+  funcname = mkfuncname(L, name);
+  if (ll_loadfunc(L, filename, funcname) != 0)
+    loaderror(L);
+  return 1;  /* library loaded successfully */
+}
+
+
+static int loader_Croot (lua_State *L) {
+  const char *funcname;
+  const char *filename;
+  const char *name = luaL_checkstring(L, 1);
+  const char *p = strchr(name, '.');
+  int stat;
+  if (p == NULL) return 0;  /* is root */
+  lua_pushlstring(L, name, p - name);
+  filename = findfile(L, lua_tostring(L, -1), "cpath");
+  if (filename == NULL) return 0;  /* root not found */
+  funcname = mkfuncname(L, name);
+  if ((stat = ll_loadfunc(L, filename, funcname)) != 0) {
+    if (stat == ERRFUNC) return 0;  /* function not found */
+    else
+      loaderror(L);  /* real error */
+  }
+  return 1;
+}
+
+
+static int loader_preload (lua_State *L) {
+  lua_getfield(L, LUA_ENVIRONINDEX, "preload");
+  if (!lua_istable(L, -1))
+    luaL_error(L, LUA_QL("package.preload") " must be a table");
+  lua_getfield(L, -1, luaL_checkstring(L, 1));
+  return 1;
+}
+
+
+static const int sentinel = 0;
+
+
+static int ll_require (lua_State *L) {
+  const char *name = luaL_checkstring(L, 1);
+  int i;
+  lua_settop(L, 1);  /* _LOADED table will be at index 2 */
+  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  lua_getfield(L, 2, name);
+  if (lua_toboolean(L, -1)) {  /* is it there? */
+    if (lua_touserdata(L, -1) == &sentinel)  /* check loops */
+      luaL_error(L, "loop or previous error loading module " LUA_QS, name);
+    return 1;  /* package is already loaded */
+  }
+  /* else must load it; iterate over available loaders */
+  lua_getfield(L, LUA_ENVIRONINDEX, "loaders");
+  if (!lua_istable(L, -1))
+    luaL_error(L, LUA_QL("package.loaders") " must be a table");
+  for (i=1; ; i++) {
+    lua_rawgeti(L, -1, i);  /* get a loader */
+    if (lua_isnil(L, -1))
+      luaL_error(L, "module " LUA_QS " not found", name);
+    lua_pushstring(L, name);
+    lua_call(L, 1, 1);  /* call it */
+    if (lua_isnil(L, -1)) lua_pop(L, 1);  /* did not found module */
+    else break;  /* module loaded successfully */
+  }
+  lua_pushlightuserdata(L, (void *)&sentinel);
+  lua_setfield(L, 2, name);  /* _LOADED[name] = sentinel */
+  lua_pushstring(L, name);  /* pass name as argument to module */
+  lua_call(L, 1, 1);  /* run loaded 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_touserdata(L, -1) == &sentinel) {   /* 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 */
+  }
+  return 1;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** 'module' function
+** =======================================================
+*/
+  
+
+static void setfenv (lua_State *L) {
+  lua_Debug ar;
+  lua_getstack(L, 1, &ar);
+  lua_getinfo(L, "f", &ar);
+  lua_pushvalue(L, -2);
+  lua_setfenv(L, -2);
+  lua_pop(L, 1);
+}
+
+
+static void dooptions (lua_State *L, int n) {
+  int i;
+  for (i = 2; i <= n; i++) {
+    lua_pushvalue(L, i);  /* get option (a function) */
+    lua_pushvalue(L, -2);  /* module */
+    lua_call(L, 1, 0);
+  }
+}
+
+
+static void modinit (lua_State *L, const char *modname) {
+  const char *dot;
+  lua_pushvalue(L, -1);
+  lua_setfield(L, -2, "_M");  /* module._M = module */
+  lua_pushstring(L, modname);
+  lua_setfield(L, -2, "_NAME");
+  dot = strrchr(modname, '.');  /* look for last dot in module name */
+  if (dot == NULL) dot = modname;
+  else dot++;
+  /* set _PACKAGE as package name (full module name minus last part) */
+  lua_pushlstring(L, modname, dot - modname);
+  lua_setfield(L, -2, "_PACKAGE");
+}
+
+
+static int ll_module (lua_State *L) {
+  const char *modname = luaL_checkstring(L, 1);
+  int loaded = lua_gettop(L) + 1;  /* index of _LOADED table */
+  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  lua_getfield(L, loaded, modname);  /* get _LOADED[modname] */
+  if (!lua_istable(L, -1)) {  /* not found? */
+    lua_pop(L, 1);  /* remove previous result */
+    /* try global variable (and create one if it does not exist) */
+    if (luaL_findtable(L, LUA_GLOBALSINDEX, modname) != NULL)
+      return luaL_error(L, "name conflict for module " LUA_QS, modname);
+    lua_pushvalue(L, -1);
+    lua_setfield(L, loaded, modname);  /* _LOADED[modname] = new table */
+  }
+  /* check whether table already has a _NAME field */
+  lua_getfield(L, -1, "_NAME");
+  if (!lua_isnil(L, -1))  /* is table an initialized module? */
+    lua_pop(L, 1);
+  else {  /* no; initialize it */
+    lua_pop(L, 1);
+    modinit(L, modname);
+  }
+  lua_pushvalue(L, -1);
+  setfenv(L);
+  dooptions(L, loaded - 1);
+  return 0;
+}
+
+
+static int ll_seeall (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (!lua_getmetatable(L, 1)) {
+    lua_newtable(L); /* create new metatable */
+    lua_pushvalue(L, -1);
+    lua_setmetatable(L, 1);
+  }
+  lua_pushvalue(L, LUA_GLOBALSINDEX);
+  lua_setfield(L, -2, "__index");  /* mt.__index = _G */
+  return 0;
+}
+
+
+/* }====================================================== */
+
+
+
+/* auxiliary mark (for internal use) */
+#define AUXMARK		"\1"
+
+static void setpath (lua_State *L, const char *fieldname, const char *envname,
+                                   const char *def) {
+  const char *path = getenv(envname);
+  if (path == NULL)  /* no environment variable? */
+    lua_pushstring(L, def);  /* use default */
+  else {
+    /* replace ";;" by ";AUXMARK;" and then AUXMARK by default path */
+    path = luaL_gsub(L, path, LUA_PATHSEP LUA_PATHSEP,
+                              LUA_PATHSEP AUXMARK LUA_PATHSEP);
+    luaL_gsub(L, path, AUXMARK, def);
+    lua_remove(L, -2);
+  }
+  setprogdir(L);
+  lua_setfield(L, -2, fieldname);
+}
+
+
+static const luaL_Reg pk_funcs[] = {
+  {"loadlib", ll_loadlib},
+  {"seeall", ll_seeall},
+  {NULL, NULL}
+};
+
+
+static const luaL_Reg ll_funcs[] = {
+  {"module", ll_module},
+  {"require", ll_require},
+  {NULL, NULL}
+};
+
+
+static const lua_CFunction loaders[] =
+  {loader_preload, loader_Lua, loader_C, loader_Croot, NULL};
+
+
+LUALIB_API int luaopen_package (lua_State *L) {
+  int i;
+  /* create new type _LOADLIB */
+  luaL_newmetatable(L, "_LOADLIB");
+  lua_pushcfunction(L, gctm);
+  lua_setfield(L, -2, "__gc");
+  /* create `package' table */
+  luaL_register(L, LUA_LOADLIBNAME, pk_funcs);
+#if defined(LUA_COMPAT_LOADLIB) 
+  lua_getfield(L, -1, "loadlib");
+  lua_setfield(L, LUA_GLOBALSINDEX, "loadlib");
+#endif
+  lua_pushvalue(L, -1);
+  lua_setfield(L, LUA_REGISTRYINDEX, "_PACKAGE");
+  lua_pushvalue(L, -1);
+  lua_replace(L, LUA_ENVIRONINDEX);
+  /* create `loaders' table */
+  lua_newtable(L);
+  /* fill it with pre-defined loaders */
+  for (i=0; loaders[i] != NULL; i++) {
+    lua_pushcfunction(L, loaders[i]);
+    lua_rawseti(L, -2, i+1);
+  }
+  lua_setfield(L, -2, "loaders");  /* put it in field `loaders' */
+  setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT);  /* set field `path' */
+  setpath(L, "cpath", LUA_CPATH, LUA_CPATH_DEFAULT); /* set field `cpath' */
+  /* store config information */
+  lua_pushstring(L, LUA_DIRSEP "\n" LUA_PATHSEP "\n" LUA_PATH_MARK "\n"
+                    LUA_EXECDIR "\n" LUA_IGMARK);
+  lua_setfield(L, -2, "config");
+  /* set field `loaded' */
+  lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
+  lua_setfield(L, -2, "loaded");
+  /* set field `preload' */
+  lua_newtable(L);
+  lua_setfield(L, -2, "preload");
+  lua_pushvalue(L, LUA_GLOBALSINDEX);
+  luaL_register(L, NULL, ll_funcs);  /* open lib into global table */
+  lua_pop(L, 1);
+  return 1;  /* return 'package' table */
+}
+

lobject.c

@@ -0,0 +1,212 @@
+/*
+** $Id: lobject.c,v 2.17 2005/07/31 17:11:50 roberto Exp roberto $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lobject_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldo.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lvm.h"
+
+
+
+const TValue luaO_nilobject = {{NULL}, LUA_TNIL};
+
+
+/*
+** converts an integer to a "floating point byte", represented as
+** (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
+** eeeee != 0 and (xxx) otherwise.
+*/
+int luaO_int2fb (unsigned int x) {
+  int e = 0;  /* expoent */
+  while (x >= 16) {
+    x = (x+1) >> 1;
+    e++;
+  }
+  if (x < 8) return x;
+  else return ((e+1) << 3) | (cast(int, x) - 8);
+}
+
+
+/* converts back */
+int luaO_fb2int (int x) {
+  int e = (x >> 3) & 31;
+  if (e == 0) return x;
+  else return ((x & 7)+8) << (e - 1);
+}
+
+
+int luaO_log2 (unsigned int x) {
+  static const lu_byte log_2[256] = {
+    0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
+  };
+  int l = -1;
+  while (x >= 256) { l += 8; x >>= 8; }
+  return l + log_2[x];
+
+}
+
+
+int luaO_rawequalObj (const TValue *t1, const TValue *t2) {
+  if (ttype(t1) != ttype(t2)) return 0;
+  else switch (ttype(t1)) {
+    case LUA_TNIL:
+      return 1;
+    case LUA_TNUMBER:
+      return luai_numeq(L, nvalue(t1), nvalue(t2));
+    case LUA_TBOOLEAN:
+      return bvalue(t1) == bvalue(t2);  /* boolean true must be 1 !! */
+    case LUA_TLIGHTUSERDATA:
+      return pvalue(t1) == pvalue(t2);
+    default:
+      lua_assert(iscollectable(t1));
+      return gcvalue(t1) == gcvalue(t2);
+  }
+}
+
+
+int luaO_str2d (const char *s, lua_Number *result) {
+  char *endptr;
+  *result = lua_str2number(s, &endptr);
+  if (endptr == s) return 0;  /* conversion failed */
+  if (*endptr == '\0') return 1;  /* most common case */
+  while (isspace(cast(unsigned char, *endptr))) endptr++;
+  if (*endptr != '\0') return 0;  /* invalid trailing characters? */
+  return 1;
+}
+
+
+
+static void pushstr (lua_State *L, const char *str) {
+  setsvalue2s(L, L->top, luaS_new(L, str));
+  incr_top(L);
+}
+
+
+/* this function handles only `%d', `%c', %f, %p, and `%s' formats */
+const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
+  int n = 1;
+  pushstr(L, "");
+  for (;;) {
+    const char *e = strchr(fmt, '%');
+    if (e == NULL) break;
+    setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt));
+    incr_top(L);
+    switch (*(e+1)) {
+      case 's': {
+        const char *s = va_arg(argp, char *);
+        if (s == NULL) s = "(null)";
+        pushstr(L, s);
+        break;
+      }
+      case 'c': {
+        char buff[2];
+        buff[0] = cast(char, va_arg(argp, int));
+        buff[1] = '\0';
+        pushstr(L, buff);
+        break;
+      }
+      case 'd': {
+        setnvalue(L->top, cast(lua_Number, va_arg(argp, int)));
+        incr_top(L);
+        break;
+      }
+      case 'f': {
+        setnvalue(L->top, cast(lua_Number, va_arg(argp, l_uacNumber)));
+        incr_top(L);
+        break;
+      }
+      case 'p': {
+        char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
+        sprintf(buff, "%p", va_arg(argp, void *));
+        pushstr(L, buff);
+        break;
+      }
+      case '%': {
+        pushstr(L, "%");
+        break;
+      }
+      default: {
+        char buff[3];
+        buff[0] = '%';
+        buff[1] = *(e+1);
+        buff[2] = '\0';
+        pushstr(L, buff);
+        break;
+      }
+    }
+    n += 2;
+    fmt = e+2;
+  }
+  pushstr(L, fmt);
+  luaV_concat(L, n+1, cast(int, L->top - L->base) - 1);
+  L->top -= n;
+  return svalue(L->top - 1);
+}
+
+
+const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
+  const char *msg;
+  va_list argp;
+  va_start(argp, fmt);
+  msg = luaO_pushvfstring(L, fmt, argp);
+  va_end(argp);
+  return msg;
+}
+
+
+void luaO_chunkid (char *out, const char *source, size_t bufflen) {
+  if (*source == '=') {
+    strncpy(out, source+1, bufflen);  /* remove first char */
+    out[bufflen-1] = '\0';  /* ensures null termination */
+  }
+  else {  /* out = "source", or "...source" */
+    if (*source == '@') {
+      size_t l;
+      source++;  /* skip the `@' */
+      bufflen -= sizeof(" '...' ");
+      l = strlen(source);
+      strcpy(out, "");
+      if (l > bufflen) {
+        source += (l-bufflen);  /* get last part of file name */
+        strcat(out, "...");
+      }
+      strcat(out, source);
+    }
+    else {  /* out = [string "string"] */
+      size_t len = strcspn(source, "\n\r");  /* stop at first newline */
+      bufflen -= sizeof(" [string \"...\"] ");
+      if (len > bufflen) len = bufflen;
+      strcpy(out, "[string \"");
+      if (source[len] != '\0') {  /* must truncate? */
+        strncat(out, source, len);
+        strcat(out, "...");
+      }
+      else
+        strcat(out, source);
+      strcat(out, "\"]");
+    }
+  }
+}

lobject.h

@@ -0,0 +1,380 @@
+/*
+** $Id: lobject.h,v 2.16 2005/06/13 14:15:54 roberto Exp roberto $
+** Type definitions for Lua objects
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lobject_h
+#define lobject_h
+
+
+#include <stdarg.h>
+
+
+#include "llimits.h"
+#include "lua.h"
+
+
+/* tags for values visible from Lua */
+#define LAST_TAG	LUA_TTHREAD
+
+#define NUM_TAGS	(LAST_TAG+1)
+
+
+/*
+** Extra tags for non-values
+*/
+#define LUA_TPROTO	(LAST_TAG+1)
+#define LUA_TUPVAL	(LAST_TAG+2)
+#define LUA_TDEADKEY	(LAST_TAG+3)
+
+
+/*
+** Union of all collectable objects
+*/
+typedef union GCObject GCObject;
+
+
+/*
+** Common Header for all collectable objects (in macro form, to be
+** included in other objects)
+*/
+#define CommonHeader	GCObject *next; lu_byte tt; lu_byte marked
+
+
+/*
+** Common header in struct form
+*/
+typedef struct GCheader {
+  CommonHeader;
+} GCheader;
+
+
+
+
+/*
+** Union of all Lua values
+*/
+typedef union {
+  GCObject *gc;
+  void *p;
+  lua_Number n;
+  int b;
+} Value;
+
+
+/*
+** Tagged Values
+*/
+
+#define TValuefields	Value value; int tt
+
+typedef struct lua_TValue {
+  TValuefields;
+} TValue;
+
+
+/* Macros to test type */
+#define ttisnil(o)	(ttype(o) == LUA_TNIL)
+#define ttisnumber(o)	(ttype(o) == LUA_TNUMBER)
+#define ttisstring(o)	(ttype(o) == LUA_TSTRING)
+#define ttistable(o)	(ttype(o) == LUA_TTABLE)
+#define ttisfunction(o)	(ttype(o) == LUA_TFUNCTION)
+#define ttisboolean(o)	(ttype(o) == LUA_TBOOLEAN)
+#define ttisuserdata(o)	(ttype(o) == LUA_TUSERDATA)
+#define ttisthread(o)	(ttype(o) == LUA_TTHREAD)
+#define ttislightuserdata(o)	(ttype(o) == LUA_TLIGHTUSERDATA)
+
+/* Macros to access values */
+#define ttype(o)	((o)->tt)
+#define gcvalue(o)	check_exp(iscollectable(o), (o)->value.gc)
+#define pvalue(o)	check_exp(ttislightuserdata(o), (o)->value.p)
+#define nvalue(o)	check_exp(ttisnumber(o), (o)->value.n)
+#define rawtsvalue(o)	check_exp(ttisstring(o), &(o)->value.gc->ts)
+#define tsvalue(o)	(&rawtsvalue(o)->tsv)
+#define rawuvalue(o)	check_exp(ttisuserdata(o), &(o)->value.gc->u)
+#define uvalue(o)	(&rawuvalue(o)->uv)
+#define clvalue(o)	check_exp(ttisfunction(o), &(o)->value.gc->cl)
+#define hvalue(o)	check_exp(ttistable(o), &(o)->value.gc->h)
+#define bvalue(o)	check_exp(ttisboolean(o), (o)->value.b)
+#define thvalue(o)	check_exp(ttisthread(o), &(o)->value.gc->th)
+
+#define l_isfalse(o)	(ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
+
+/*
+** for internal debug only
+*/
+#define checkconsistency(obj) \
+  lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt))
+
+#define checkliveness(g,obj) \
+  lua_assert(!iscollectable(obj) || \
+  ((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc)))
+
+
+/* Macros to set values */
+#define setnilvalue(obj) ((obj)->tt=LUA_TNIL)
+
+#define setnvalue(obj,x) \
+  { TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; }
+
+#define chgnvalue(obj,x) \
+	check_exp(ttype(obj)==LUA_TNUMBER, (obj)->value.n=(x))
+
+#define setpvalue(obj,x) \
+  { TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; }
+
+#define setbvalue(obj,x) \
+  { TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; }
+
+#define setsvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \
+    checkliveness(G(L),i_o); }
+
+#define setuvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \
+    checkliveness(G(L),i_o); }
+
+#define setthvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \
+    checkliveness(G(L),i_o); }
+
+#define setclvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \
+    checkliveness(G(L),i_o); }
+
+#define sethvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \
+    checkliveness(G(L),i_o); }
+
+#define setptvalue(L,obj,x) \
+  { TValue *i_o=(obj); \
+    i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
+    checkliveness(G(L),i_o); }
+
+
+
+
+#define setobj(L,obj1,obj2) \
+  { const TValue *o2=(obj2); TValue *o1=(obj1); \
+    o1->value = o2->value; o1->tt=o2->tt; \
+    checkliveness(G(L),o1); }
+
+
+/*
+** different types of sets, according to destination
+*/
+
+/* from stack to (same) stack */
+#define setobjs2s	setobj
+/* to stack (not from same stack) */
+#define setobj2s	setobj
+#define setsvalue2s	setsvalue
+#define sethvalue2s	sethvalue
+#define setptvalue2s	setptvalue
+/* from table to same table */
+#define setobjt2t	setobj
+/* to table */
+#define setobj2t	setobj
+/* to new object */
+#define setobj2n	setobj
+#define setsvalue2n	setsvalue
+
+#define setttype(obj, tt) (ttype(obj) = (tt))
+
+
+#define iscollectable(o)	(ttype(o) >= LUA_TSTRING)
+
+
+
+typedef TValue *StkId;  /* index to stack elements */
+
+
+/*
+** String headers for string table
+*/
+typedef union TString {
+  L_Umaxalign dummy;  /* ensures maximum alignment for strings */
+  struct {
+    CommonHeader;
+    lu_byte reserved;
+    unsigned int hash;
+    size_t len;
+  } tsv;
+} TString;
+
+
+#define getstr(ts)	cast(const char *, (ts) + 1)
+#define svalue(o)       getstr(tsvalue(o))
+
+
+
+typedef union Udata {
+  L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
+  struct {
+    CommonHeader;
+    struct Table *metatable;
+    struct Table *env;
+    size_t len;
+  } uv;
+} Udata;
+
+
+
+
+/*
+** Function Prototypes
+*/
+typedef struct Proto {
+  CommonHeader;
+  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 */
+  struct LocVar *locvars;  /* information about local variables */
+  TString **upvalues;  /* upvalue names */
+  TString  *source;
+  int sizeupvalues;
+  int sizek;  /* size of `k' */
+  int sizecode;
+  int sizelineinfo;
+  int sizep;  /* size of `p' */
+  int sizelocvars;
+  int linedefined;
+  int lastlinedefined;
+  GCObject *gclist;
+  lu_byte nups;  /* number of upvalues */
+  lu_byte numparams;
+  lu_byte is_vararg;
+  lu_byte maxstacksize;
+} Proto;
+
+
+/* masks for new-style vararg */
+#define VARARG_HASARG		1
+#define VARARG_ISVARARG		2
+#define VARARG_NEEDSARG		4
+
+
+typedef struct LocVar {
+  TString *varname;
+  int startpc;  /* first point where variable is active */
+  int endpc;    /* first point where variable is dead */
+} LocVar;
+
+
+
+/*
+** Upvalues
+*/
+
+typedef struct UpVal {
+  CommonHeader;
+  TValue *v;  /* points to stack or to its own value */
+  union {
+    TValue value;  /* the value (when closed) */
+    struct {  /* double linked list (when open) */
+      struct UpVal *prev;
+      struct UpVal *next;
+    } l;
+  } u;
+} UpVal;
+
+
+/*
+** Closures
+*/
+
+#define ClosureHeader \
+	CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \
+	struct Table *env
+
+typedef struct CClosure {
+  ClosureHeader;
+  lua_CFunction f;
+  TValue upvalue[1];
+} CClosure;
+
+
+typedef struct LClosure {
+  ClosureHeader;
+  struct Proto *p;
+  UpVal *upvals[1];
+} LClosure;
+
+
+typedef union Closure {
+  CClosure c;
+  LClosure l;
+} Closure;
+
+
+#define iscfunction(o)	(ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC)
+#define isLfunction(o)	(ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
+
+
+/*
+** Tables
+*/
+
+typedef struct TKey {
+  TValuefields;
+  struct Node *next;  /* for chaining */
+} TKey;
+
+
+typedef struct Node {
+  TValue i_val;
+  TKey i_key;
+} Node;
+
+
+typedef struct Table {
+  CommonHeader;
+  lu_byte flags;  /* 1<<p means tagmethod(p) is not present */ 
+  lu_byte lsizenode;  /* log2 of size of `node' array */
+  struct Table *metatable;
+  TValue *array;  /* array part */
+  Node *node;
+  Node *lastfree;  /* any free position is before this position */
+  GCObject *gclist;
+  int sizearray;  /* size of `array' array */
+} Table;
+
+
+
+/*
+** `module' operation for hashing (size is always a power of 2)
+*/
+#define lmod(s,size) \
+	check_exp((size&(size-1))==0, (cast(int, (s) & ((size)-1))))
+
+
+#define twoto(x)	(1<<(x))
+#define sizenode(t)	(twoto((t)->lsizenode))
+
+
+
+LUAI_DATA const TValue luaO_nilobject;
+
+#define ceillog2(x)	(luaO_log2((x)-1) + 1)
+
+LUAI_FUNC int luaO_log2 (unsigned int x);
+LUAI_FUNC int luaO_int2fb (unsigned int x);
+LUAI_FUNC int luaO_fb2int (int x);
+LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2);
+LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result);
+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, ...);
+LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t len);
+
+
+#endif
+

lopcodes.c

@@ -0,0 +1,104 @@
+/*
+** $Id: lopcodes.c,v 1.34 2005/05/20 15:53:42 roberto Exp $
+** See Copyright Notice in lua.h
+*/
+
+
+#define lopcodes_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lopcodes.h"
+
+
+/* ORDER OP */
+
+const char *const luaP_opnames[NUM_OPCODES+1] = {
+  "MOVE",
+  "LOADK",
+  "LOADBOOL",
+  "LOADNIL",
+  "GETUPVAL",
+  "GETGLOBAL",
+  "GETTABLE",
+  "SETGLOBAL",
+  "SETUPVAL",
+  "SETTABLE",
+  "NEWTABLE",
+  "SELF",
+  "ADD",
+  "SUB",
+  "MUL",
+  "DIV",
+  "MOD",
+  "POW",
+  "UNM",
+  "NOT",
+  "LEN",
+  "CONCAT",
+  "JMP",
+  "EQ",
+  "LT",
+  "LE",
+  "TEST",
+  "TESTSET",
+  "CALL",
+  "TAILCALL",
+  "RETURN",
+  "FORLOOP",
+  "FORPREP",
+  "TFORLOOP",
+  "SETLIST",
+  "CLOSE",
+  "CLOSURE",
+  "VARARG",
+  NULL
+};
+
+
+#define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m))
+
+const lu_byte luaP_opmodes[NUM_OPCODES] = {
+/*       T  A    B       C     mode		   opcode	*/
+  opmode(0, 1, OpArgR, OpArgN, iABC) 		/* OP_MOVE */
+ ,opmode(0, 1, OpArgK, OpArgN, iABx)		/* OP_LOADK */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_LOADBOOL */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LOADNIL */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_GETUPVAL */
+ ,opmode(0, 1, OpArgK, OpArgN, iABx)		/* OP_GETGLOBAL */
+ ,opmode(0, 1, OpArgR, OpArgK, iABC)		/* OP_GETTABLE */
+ ,opmode(0, 0, OpArgK, OpArgN, iABx)		/* OP_SETGLOBAL */
+ ,opmode(0, 0, OpArgU, OpArgN, iABC)		/* OP_SETUPVAL */
+ ,opmode(0, 0, OpArgK, OpArgK, iABC)		/* OP_SETTABLE */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_NEWTABLE */
+ ,opmode(0, 1, OpArgR, OpArgK, iABC)		/* OP_SELF */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_ADD */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_SUB */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MUL */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_DIV */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_MOD */
+ ,opmode(0, 1, OpArgK, OpArgK, iABC)		/* OP_POW */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_UNM */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_NOT */
+ ,opmode(0, 1, OpArgR, OpArgN, iABC)		/* OP_LEN */
+ ,opmode(0, 1, OpArgR, OpArgR, iABC)		/* OP_CONCAT */
+ ,opmode(0, 0, OpArgR, OpArgN, iAsBx)		/* OP_JMP */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_EQ */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LT */
+ ,opmode(1, 0, OpArgK, OpArgK, iABC)		/* OP_LE */
+ ,opmode(1, 0, OpArgR, OpArgU, iABC)		/* OP_TEST */
+ ,opmode(1, 1, OpArgR, OpArgU, iABC)		/* OP_TESTSET */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_CALL */
+ ,opmode(0, 1, OpArgU, OpArgU, iABC)		/* OP_TAILCALL */
+ ,opmode(0, 0, OpArgU, OpArgN, iABC)		/* OP_RETURN */
+ ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_FORLOOP */
+ ,opmode(0, 1, OpArgR, OpArgN, iAsBx)		/* OP_FORPREP */
+ ,opmode(1, 0, OpArgN, OpArgU, iABC)		/* OP_TFORLOOP */
+ ,opmode(0, 0, OpArgU, OpArgU, iABC)		/* OP_SETLIST */
+ ,opmode(0, 0, OpArgN, OpArgN, iABC)		/* OP_CLOSE */
+ ,opmode(0, 1, OpArgU, OpArgN, iABx)		/* OP_CLOSURE */
+ ,opmode(0, 1, OpArgU, OpArgN, iABC)		/* OP_VARARG */
+};
+

lopcodes.h

@@ -0,0 +1,268 @@
+/*
+** $Id: lopcodes.h,v 1.121 2005/06/06 13:30:25 roberto Exp $
+** Opcodes for Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lopcodes_h
+#define lopcodes_h
+
+#include "llimits.h"
+
+
+/*===========================================================================
+  We assume that instructions are unsigned numbers.
+  All instructions have an opcode in the first 6 bits.
+  Instructions can have the following fields:
+	`A' : 8 bits
+	`B' : 9 bits
+	`C' : 9 bits
+	`Bx' : 18 bits (`B' and `C' together)
+	`sBx' : signed Bx
+
+  A signed argument is represented in excess K; that is, the number
+  value is the unsigned value minus K. K is exactly the maximum value
+  for that argument (so that -max is represented by 0, and +max is
+  represented by 2*max), which is half the maximum for the corresponding
+  unsigned argument.
+===========================================================================*/
+
+
+enum OpMode {iABC, iABx, iAsBx};  /* basic instruction format */
+
+
+/*
+** size and position of opcode arguments.
+*/
+#define SIZE_C		9
+#define SIZE_B		9
+#define SIZE_Bx		(SIZE_C + SIZE_B)
+#define SIZE_A		8
+
+#define SIZE_OP		6
+
+#define POS_OP		0
+#define POS_A		(POS_OP + SIZE_OP)
+#define POS_C		(POS_A + SIZE_A)
+#define POS_B		(POS_C + SIZE_C)
+#define POS_Bx		POS_C
+
+
+/*
+** limits for opcode arguments.
+** we use (signed) int to manipulate most arguments,
+** so they must fit in LUAI_BITSINT-1 bits (-1 for sign)
+*/
+#if SIZE_Bx < LUAI_BITSINT-1
+#define MAXARG_Bx        ((1<<SIZE_Bx)-1)
+#define MAXARG_sBx        (MAXARG_Bx>>1)         /* `sBx' is signed */
+#else
+#define MAXARG_Bx        MAX_INT
+#define MAXARG_sBx        MAX_INT
+#endif
+
+
+#define MAXARG_A        ((1<<SIZE_A)-1)
+#define MAXARG_B        ((1<<SIZE_B)-1)
+#define MAXARG_C        ((1<<SIZE_C)-1)
+
+
+/* creates a mask with `n' 1 bits at position `p' */
+#define MASK1(n,p)	((~((~(Instruction)0)<<n))<<p)
+
+/* creates a mask with `n' 0 bits at position `p' */
+#define MASK0(n,p)	(~MASK1(n,p))
+
+/*
+** the following macros help to manipulate instructions
+*/
+
+#define GET_OPCODE(i)	(cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0)))
+#define SET_OPCODE(i,o)	((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
+		((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
+
+#define GETARG_A(i)	(cast(int, ((i)>>POS_A) & MASK1(SIZE_A,0)))
+#define SETARG_A(i,u)	((i) = (((i)&MASK0(SIZE_A,POS_A)) | \
+		((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A))))
+
+#define GETARG_B(i)	(cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0)))
+#define SETARG_B(i,b)	((i) = (((i)&MASK0(SIZE_B,POS_B)) | \
+		((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B))))
+
+#define GETARG_C(i)	(cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0)))
+#define SETARG_C(i,b)	((i) = (((i)&MASK0(SIZE_C,POS_C)) | \
+		((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C))))
+
+#define GETARG_Bx(i)	(cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0)))
+#define SETARG_Bx(i,b)	((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \
+		((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx))))
+
+#define GETARG_sBx(i)	(GETARG_Bx(i)-MAXARG_sBx)
+#define SETARG_sBx(i,b)	SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx))
+
+
+#define CREATE_ABC(o,a,b,c)	((cast(Instruction, o)<<POS_OP) \
+			| (cast(Instruction, a)<<POS_A) \
+			| (cast(Instruction, b)<<POS_B) \
+			| (cast(Instruction, c)<<POS_C))
+
+#define CREATE_ABx(o,a,bc)	((cast(Instruction, o)<<POS_OP) \
+			| (cast(Instruction, a)<<POS_A) \
+			| (cast(Instruction, bc)<<POS_Bx))
+
+
+/*
+** Macros to operate RK indices
+*/
+
+/* this bit 1 means constant (0 means register) */
+#define BITRK		(1 << (SIZE_B - 1))
+
+/* test whether value is a constant */
+#define ISK(x)		((x) & BITRK)
+
+/* gets the index of the constant */
+#define INDEXK(r)	((int)(r) & ~BITRK)
+
+#define MAXINDEXRK	(BITRK - 1)
+
+/* code a constant index as a RK value */
+#define RKASK(x)	((x) | BITRK)
+
+
+/*
+** invalid register that fits in 8 bits
+*/
+#define NO_REG		MAXARG_A
+
+
+/*
+** R(x) - register
+** Kst(x) - constant (in constant table)
+** RK(x) == if ISK(x) then Kst(INDEXK(x)) else R(x)
+*/
+
+
+/*
+** grep "ORDER OP" if you change these enums
+*/
+
+typedef enum {
+/*----------------------------------------------------------------------
+name		args	description
+------------------------------------------------------------------------*/
+OP_MOVE,/*	A B	R(A) := R(B)					*/
+OP_LOADK,/*	A Bx	R(A) := Kst(Bx)					*/
+OP_LOADBOOL,/*	A B C	R(A) := (Bool)B; if (C) pc++			*/
+OP_LOADNIL,/*	A B	R(A) := ... := R(B) := nil			*/
+OP_GETUPVAL,/*	A B	R(A) := UpValue[B]				*/
+
+OP_GETGLOBAL,/*	A Bx	R(A) := Gbl[Kst(Bx)]				*/
+OP_GETTABLE,/*	A B C	R(A) := R(B)[RK(C)]				*/
+
+OP_SETGLOBAL,/*	A Bx	Gbl[Kst(Bx)] := R(A)				*/
+OP_SETUPVAL,/*	A B	UpValue[B] := R(A)				*/
+OP_SETTABLE,/*	A B C	R(A)[RK(B)] := RK(C)				*/
+
+OP_NEWTABLE,/*	A B C	R(A) := {} (size = B,C)				*/
+
+OP_SELF,/*	A B C	R(A+1) := R(B); R(A) := R(B)[RK(C)]		*/
+
+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_UNM,/*	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,/*	sBx	pc+=sBx					*/
+
+OP_EQ,/*	A B C	if ((RK(B) == RK(C)) ~= A) then pc++		*/
+OP_LT,/*	A B C	if ((RK(B) <  RK(C)) ~= A) then pc++  		*/
+OP_LE,/*	A B C	if ((RK(B) <= RK(C)) ~= A) then pc++  		*/
+
+OP_TEST,/*	A C	if not (R(A) <=> C) then pc++			*/ 
+OP_TESTSET,/*	A B C	if (R(B) <=> C) then R(A) := R(B) else pc++	*/ 
+
+OP_CALL,/*	A B C	R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
+OP_TAILCALL,/*	A B C	return R(A)(R(A+1), ... ,R(A+B-1))		*/
+OP_RETURN,/*	A B	return R(A), ... ,R(A+B-2)	(see note)	*/
+
+OP_FORLOOP,/*	A sBx	R(A)+=R(A+2); if R(A) <?= R(A+1) then pc+=sBx	*/
+OP_FORPREP,/*	A sBx	R(A)-=R(A+2); pc+=sBx				*/
+
+OP_TFORLOOP,/*	A C	R(A+2), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); 
+                        if R(A+2) ~= nil then pc++			*/
+
+OP_SETLIST,/*	A B C	R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B	*/
+
+OP_CLOSE,/*	A 	close all variables in the stack up to (>=) R(A)*/
+OP_CLOSURE,/*	A Bx	R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n))	*/
+
+OP_VARARG/*	A B	R(A), R(A+1), ..., R(A+B-1) = vararg		*/
+} OpCode;
+
+
+#define NUM_OPCODES	(cast(int, OP_VARARG+1))
+
+
+
+/*===========================================================================
+  Notes:
+  (*) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1,
+      and can be 0: OP_CALL then sets `top' to last_result+1, so
+      next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'.
+
+  (*) In OP_VARARG, if (B == 0) then use actual number of varargs and
+      set top (like in OP_CALL with C == 0).
+
+  (*) In OP_RETURN, if (B == 0) then return up to `top'
+
+  (*) In OP_SETLIST, if (B == 0) then B = `top';
+      if (C == 0) then next `instruction' is real C
+
+  (*) For comparisons, A specifies what condition the test should accept
+      (true or false).
+
+  (*) All `skips' (pc++) assume that next instruction is a jump
+===========================================================================*/
+
+
+/*
+** masks for instruction properties. The format is:
+** bits 0-1: op mode
+** bits 2-3: C arg mode
+** bits 4-5: B arg mode
+** bit 6: instruction set register A
+** bit 7: operator is a test
+*/  
+
+enum OpArgMask {
+  OpArgN,  /* argument is not used */
+  OpArgU,  /* argument is used */
+  OpArgR,  /* argument is a register or a jump offset */
+  OpArgK   /* argument is a constant or register/constant */
+};
+
+LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES];
+
+#define getOpMode(m)	(cast(enum OpMode, luaP_opmodes[m] & 3))
+#define getBMode(m)	(cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3))
+#define getCMode(m)	(cast(enum OpArgMask, (luaP_opmodes[m] >> 2) & 3))
+#define testAMode(m)	(luaP_opmodes[m] & (1 << 6))
+#define testTMode(m)	(luaP_opmodes[m] & (1 << 7))
+
+
+LUAI_DATA const char *const luaP_opnames[NUM_OPCODES+1];  /* opcode names */
+
+
+/* number of list items to accumulate before a SETLIST instruction */
+#define LFIELDS_PER_FLUSH	50
+
+
+#endif

loslib.c

@@ -0,0 +1,237 @@
+/*
+** $Id: loslib.c,v 1.12 2005/08/26 17:36:32 roberto Exp roberto $
+** Standard Operating System library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <errno.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#define loslib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+static int os_pushresult (lua_State *L, int i, const char *filename) {
+  if (i) {
+    lua_pushboolean(L, 1);
+    return 1;
+  }
+  else {
+    lua_pushnil(L);
+    if (filename)
+      lua_pushfstring(L, "%s: %s", filename, strerror(errno));
+    else
+      lua_pushfstring(L, "%s", strerror(errno));
+    lua_pushinteger(L, errno);
+    return 3;
+  }
+}
+
+
+static int io_execute (lua_State *L) {
+  lua_pushinteger(L, system(luaL_optstring(L, 1, NULL)));
+  return 1;
+}
+
+
+static int io_remove (lua_State *L) {
+  const char *filename = luaL_checkstring(L, 1);
+  return os_pushresult(L, remove(filename) == 0, filename);
+}
+
+
+static int io_rename (lua_State *L) {
+  const char *fromname = luaL_checkstring(L, 1);
+  const char *toname = luaL_checkstring(L, 2);
+  return os_pushresult(L, rename(fromname, toname) == 0, fromname);
+}
+
+
+static int io_tmpname (lua_State *L) {
+  char buff[LUA_TMPNAMBUFSIZE];
+  int err;
+  lua_tmpnam(buff, err);
+  if (err)
+    return luaL_error(L, "unable to generate a unique filename");
+  lua_pushstring(L, buff);
+  return 1;
+}
+
+
+static int io_getenv (lua_State *L) {
+  lua_pushstring(L, getenv(luaL_checkstring(L, 1)));  /* if NULL push nil */
+  return 1;
+}
+
+
+static int io_clock (lua_State *L) {
+  lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
+  return 1;
+}
+
+
+/*
+** {======================================================
+** Time/Date operations
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
+**   wday=%w+1, yday=%j, isdst=? }
+** =======================================================
+*/
+
+static void setfield (lua_State *L, const char *key, int value) {
+  lua_pushinteger(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static void setboolfield (lua_State *L, const char *key, int value) {
+  if (value < 0)  /* undefined? */
+    return;  /* does not set field */
+  lua_pushboolean(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static int getboolfield (lua_State *L, const char *key) {
+  int res;
+  lua_getfield(L, -1, key);
+  res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
+  lua_pop(L, 1);
+  return res;
+}
+
+
+static int getfield (lua_State *L, const char *key, int d) {
+  int res;
+  lua_getfield(L, -1, key);
+  if (lua_isnumber(L, -1))
+    res = (int)lua_tointeger(L, -1);
+  else {
+    if (d < 0)
+      return luaL_error(L, "field " LUA_QS " missing in date table", key);
+    res = d;
+  }
+  lua_pop(L, 1);
+  return res;
+}
+
+
+static int io_date (lua_State *L) {
+  const char *s = luaL_optstring(L, 1, "%c");
+  lua_Number n = luaL_optnumber(L, 2, -1);
+  time_t t = (n == -1) ? time(NULL) : (time_t)n;
+  struct tm *stm;
+  if (*s == '!') {  /* UTC? */
+    stm = gmtime(&t);
+    s++;  /* skip `!' */
+  }
+  else
+    stm = localtime(&t);
+  if (stm == NULL)  /* invalid date? */
+    lua_pushnil(L);
+  else if (strcmp(s, "*t") == 0) {
+    lua_createtable(L, 0, 9);  /* 9 = number of fields */
+    setfield(L, "sec", stm->tm_sec);
+    setfield(L, "min", stm->tm_min);
+    setfield(L, "hour", stm->tm_hour);
+    setfield(L, "day", stm->tm_mday);
+    setfield(L, "month", stm->tm_mon+1);
+    setfield(L, "year", stm->tm_year+1900);
+    setfield(L, "wday", stm->tm_wday+1);
+    setfield(L, "yday", stm->tm_yday+1);
+    setboolfield(L, "isdst", stm->tm_isdst);
+  }
+  else {
+    char b[256];
+    if (strftime(b, sizeof(b), s, stm))
+      lua_pushstring(L, b);
+    else
+      return luaL_error(L, LUA_QL("date") " format too long");
+  }
+  return 1;
+}
+
+
+static int io_time (lua_State *L) {
+  time_t t;
+  if (lua_isnoneornil(L, 1))  /* called without args? */
+    t = time(NULL);  /* get current time */
+  else {
+    struct tm ts;
+    luaL_checktype(L, 1, LUA_TTABLE);
+    lua_settop(L, 1);  /* make sure table is at the top */
+    ts.tm_sec = getfield(L, "sec", 0);
+    ts.tm_min = getfield(L, "min", 0);
+    ts.tm_hour = getfield(L, "hour", 12);
+    ts.tm_mday = getfield(L, "day", -1);
+    ts.tm_mon = getfield(L, "month", -1) - 1;
+    ts.tm_year = getfield(L, "year", -1) - 1900;
+    ts.tm_isdst = getboolfield(L, "isdst");
+    t = mktime(&ts);
+  }
+  if (t == (time_t)(-1))
+    lua_pushnil(L);
+  else
+    lua_pushnumber(L, t);
+  return 1;
+}
+
+
+static int io_difftime (lua_State *L) {
+  lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
+                             (time_t)(luaL_optnumber(L, 2, 0))));
+  return 1;
+}
+
+/* }====================================================== */
+
+
+static int io_setloc (lua_State *L) {
+  static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
+                      LC_NUMERIC, LC_TIME};
+  static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
+     "numeric", "time", NULL};
+  const char *l = lua_tostring(L, 1);
+  int op = luaL_checkoption(L, 2, "all", catnames);
+  luaL_argcheck(L, l || lua_isnoneornil(L, 1), 1, "string expected");
+  lua_pushstring(L, setlocale(cat[op], l));
+  return 1;
+}
+
+
+static int io_exit (lua_State *L) {
+  exit(luaL_optint(L, 1, EXIT_SUCCESS));
+  return 0;  /* to avoid warnings */
+}
+
+static const luaL_Reg syslib[] = {
+  {"clock",     io_clock},
+  {"date",      io_date},
+  {"difftime",  io_difftime},
+  {"execute",   io_execute},
+  {"exit",      io_exit},
+  {"getenv",    io_getenv},
+  {"remove",    io_remove},
+  {"rename",    io_rename},
+  {"setlocale", io_setloc},
+  {"time",      io_time},
+  {"tmpname",   io_tmpname},
+  {NULL, NULL}
+};
+
+/* }====================================================== */
+
+
+
+LUALIB_API int luaopen_os (lua_State *L) {
+  luaL_register(L, LUA_OSLIBNAME, syslib);
+  return 1;
+}
+

lparser.h

@@ -0,0 +1,79 @@
+/*
+** $Id: lparser.h,v 1.54 2005/03/09 16:28:07 roberto Exp roberto $
+** Lua Parser
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lparser_h
+#define lparser_h
+
+#include "llimits.h"
+#include "lobject.h"
+#include "ltable.h"
+#include "lzio.h"
+
+
+/*
+** Expression descriptor
+*/
+
+typedef enum {
+  VVOID,	/* no value */
+  VNIL,
+  VTRUE,
+  VFALSE,
+  VK,		/* info = index of constant in `k' */
+  VLOCAL,	/* info = local register */
+  VUPVAL,       /* info = index of upvalue in `upvalues' */
+  VGLOBAL,	/* info = index of table; aux = index of global name in `k' */
+  VINDEXED,	/* info = table register; aux = index register (or `k') */
+  VJMP,		/* info = instruction pc */
+  VRELOCABLE,	/* info = instruction pc */
+  VNONRELOC,	/* info = result register */
+  VCALL,	/* info = instruction pc */
+  VVARARG	/* info = instruction pc */
+} expkind;
+
+typedef struct expdesc {
+  expkind k;
+  int info, aux;
+  int t;  /* patch list of `exit when true' */
+  int f;  /* patch list of `exit when false' */
+} expdesc;
+
+
+typedef struct upvaldesc {
+  lu_byte k;
+  lu_byte info;
+} upvaldesc;
+
+
+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 lua_State *L;  /* copy of the Lua state */
+  struct BlockCnt *bl;  /* chain of current blocks */
+  int pc;  /* next position to code (equivalent to `ncode') */
+  int lasttarget;   /* `pc' of last `jump target' */
+  int jpc;  /* list of pending jumps to `pc' */
+  int freereg;  /* first free register */
+  int nk;  /* number of elements in `k' */
+  int np;  /* number of elements in `p' */
+  short nlocvars;  /* number of elements in `locvars' */
+  lu_byte nactvar;  /* number of active local variables */
+  upvaldesc upvalues[LUAI_MAXUPVALUES];  /* upvalues */
+  unsigned short actvar[LUAI_MAXVARS];  /* declared-variable stack */
+} FuncState;
+
+
+LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                                            const char *name);
+
+
+#endif

lstate.c

@@ -0,0 +1,212 @@
+/*
+** $Id: lstate.c,v 2.32 2005/06/03 20:15:58 roberto Exp roberto $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stddef.h>
+
+#define lstate_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+#define state_size(x)	(sizeof(x) + LUAI_EXTRASPACE)
+#define fromstate(l)	(cast(lu_byte *, (l)) - LUAI_EXTRASPACE)
+#define tostate(l)   (cast(lua_State *, cast(lu_byte *, l) + LUAI_EXTRASPACE))
+
+
+/*
+** Main thread combines a thread state and the global state
+*/
+typedef struct LG {
+  lua_State l;
+  global_State g;
+} LG;
+  
+
+
+static void stack_init (lua_State *L1, lua_State *L) {
+  /* initialize CallInfo array */
+  L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
+  L1->ci = L1->base_ci;
+  L1->size_ci = BASIC_CI_SIZE;
+  L1->end_ci = L1->base_ci + L1->size_ci - 1;
+  /* initialize stack array */
+  L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
+  L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
+  L1->top = L1->stack;
+  L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
+  /* initialize first ci */
+  L1->ci->func = L1->top;
+  setnilvalue(L1->top++);  /* `function' entry for this `ci' */
+  L1->base = L1->ci->base = L1->top;
+  L1->ci->top = L1->top + LUA_MINSTACK;
+}
+
+
+static void freestack (lua_State *L, lua_State *L1) {
+  luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo);
+  luaM_freearray(L, L1->stack, L1->stacksize, TValue);
+}
+
+
+/*
+** open parts that may cause memory-allocation errors
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+  global_State *g = G(L);
+  UNUSED(ud);
+  stack_init(L, L);  /* init stack */
+  sethvalue(L, gt(L), luaH_new(L, 0, 20));  /* table of globals */
+  sethvalue(L, registry(L), luaH_new(L, 6, 20));  /* registry */
+  luaS_resize(L, MINSTRTABSIZE);  /* initial size of string table */
+  luaT_init(L);
+  luaX_init(L);
+  luaS_fix(luaS_newliteral(L, MEMERRMSG));
+  g->GCthreshold = 4*g->totalbytes;
+}
+
+
+static void preinit_state (lua_State *L, global_State *g) {
+  G(L) = g;
+  L->stack = NULL;
+  L->stacksize = 0;
+  L->errorJmp = NULL;
+  L->hook = NULL;
+  L->hookmask = 0;
+  L->basehookcount = 0;
+  L->allowhook = 1;
+  resethookcount(L);
+  L->openupval = NULL;
+  L->size_ci = 0;
+  L->nCcalls = 0;
+  L->status = 0;
+  L->base_ci = L->ci = NULL;
+  L->savedpc = NULL;
+  L->errfunc = 0;
+  setnilvalue(gt(L));
+}
+
+
+static void close_state (lua_State *L) {
+  global_State *g = G(L);
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
+  luaC_freeall(L);  /* collect all objects */
+  lua_assert(g->rootgc == obj2gco(L));
+  lua_assert(g->strt.nuse == 0);
+  luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *);
+  luaZ_freebuffer(L, &g->buff);
+  freestack(L, L);
+  lua_assert(g->totalbytes == sizeof(LG));
+  (*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0);
+}
+
+
+lua_State *luaE_newthread (lua_State *L) {
+  lua_State *L1 = tostate(luaM_malloc(L, state_size(lua_State)));
+  luaC_link(L, obj2gco(L1), LUA_TTHREAD);
+  preinit_state(L1, G(L));
+  stack_init(L1, L);  /* init stack */
+  setobj2n(L, gt(L1), gt(L));  /* share table of globals */
+  L1->hookmask = L->hookmask;
+  L1->basehookcount = L->basehookcount;
+  L1->hook = L->hook;
+  resethookcount(L1);
+  lua_assert(iswhite(obj2gco(L1)));
+  return L1;
+}
+
+
+void luaE_freethread (lua_State *L, lua_State *L1) {
+  luaF_close(L1, L1->stack);  /* close all upvalues for this thread */
+  lua_assert(L1->openupval == NULL);
+  freestack(L, L1);
+  luaM_freemem(L, fromstate(L1), state_size(lua_State));
+}
+
+
+LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
+  int i;
+  lua_State *L;
+  global_State *g;
+  void *l = (*f)(ud, NULL, 0, state_size(LG));
+  if (l == NULL) return NULL;
+  L = tostate(l);
+  g = &((LG *)L)->g;
+  L->next = NULL;
+  L->tt = LUA_TTHREAD;
+  g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
+  L->marked = luaC_white(g);
+  set2bits(L->marked, FIXEDBIT, SFIXEDBIT);
+  preinit_state(L, g);
+  g->frealloc = f;
+  g->ud = ud;
+  g->mainthread = L;
+  g->uvhead.u.l.prev = &g->uvhead;
+  g->uvhead.u.l.next = &g->uvhead;
+  g->GCthreshold = 0;  /* mark it as unfinished state */
+  g->strt.size = 0;
+  g->strt.nuse = 0;
+  g->strt.hash = NULL;
+  setnilvalue(registry(L));
+  luaZ_initbuffer(L, &g->buff);
+  g->panic = NULL;
+  g->gcstate = GCSpause;
+  g->rootgc = obj2gco(L);
+  g->sweepstrgc = 0;
+  g->sweepgc = &g->rootgc;
+  g->gray = NULL;
+  g->grayagain = NULL;
+  g->weak = NULL;
+  g->tmudata = NULL;
+  g->totalbytes = sizeof(LG);
+  g->gcpause = LUAI_GCPAUSE;
+  g->gcstepmul = LUAI_GCMUL;
+  g->gcdept = 0;
+  for (i=0; i<NUM_TAGS; i++) g->mt[i] = NULL;
+  if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
+    /* memory allocation error: free partial state */
+    close_state(L);
+    L = NULL;
+  }
+  else
+    luai_userstateopen(L);
+  return L;
+}
+
+
+static void callallgcTM (lua_State *L, void *ud) {
+  UNUSED(ud);
+  luaC_callGCTM(L);  /* call GC metamethods for all udata */
+}
+
+
+LUA_API void lua_close (lua_State *L) {
+  lua_lock(L);
+  L = G(L)->mainthread;  /* only the main thread can be closed */
+  luaF_close(L, L->stack);  /* close all upvalues for this thread */
+  luaC_separateudata(L, 1);  /* separate udata that have GC metamethods */
+  L->errfunc = 0;  /* no error function during GC metamethods */
+  do {  /* repeat until no more errors */
+    L->ci = L->base_ci;
+    L->base = L->top = L->ci->base;
+    L->nCcalls = 0;
+  } while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
+  lua_assert(G(L)->tmudata == NULL);
+  close_state(L);
+}
+

lstate.h

@@ -0,0 +1,168 @@
+/*
+** $Id: lstate.h,v 2.22 2005/06/03 20:15:58 roberto Exp roberto $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstate_h
+#define lstate_h
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "ltm.h"
+#include "lzio.h"
+
+
+
+struct lua_longjmp;  /* defined in ldo.c */
+
+
+/* table of globals */
+#define gt(L)	(&L->l_gt)
+
+/* registry */
+#define registry(L)	(&G(L)->l_registry)
+
+
+/* extra stack space to handle TM calls and some other extras */
+#define EXTRA_STACK   5
+
+
+#define BASIC_CI_SIZE           8
+
+#define BASIC_STACK_SIZE        (2*LUA_MINSTACK)
+
+
+
+typedef struct stringtable {
+  GCObject **hash;
+  lu_int32 nuse;  /* number of elements */
+  int size;
+} stringtable;
+
+
+/*
+** informations about a call
+*/
+typedef struct CallInfo {
+  StkId base;  /* base for this function */
+  StkId func;  /* function index in the stack */
+  StkId	top;  /* top for this function */
+  int nresults;  /* expected number of results from this function */
+  const Instruction *savedpc;
+  int tailcalls;  /* number of tail calls lost under this entry */
+} CallInfo;
+
+
+
+#define curr_func(L)	(clvalue(L->ci->func))
+#define ci_func(ci)	(clvalue((ci)->func))
+#define f_isLua(ci)	(!ci_func(ci)->c.isC)
+#define isLua(ci)	(ttisfunction((ci)->func) && f_isLua(ci))
+
+
+/*
+** `global state', shared by all threads of this state
+*/
+typedef struct global_State {
+  stringtable strt;  /* hash table for strings */
+  lua_Alloc frealloc;  /* function to reallocate memory */
+  void *ud;         /* auxiliary data to `frealloc' */
+  lu_byte currentwhite;
+  lu_byte gcstate;  /* state of garbage collector */
+  GCObject *rootgc;  /* list of all collectable objects */
+  GCObject **sweepgc;  /* position of sweep in `rootgc' */
+  int sweepstrgc;  /* position of sweep in `strt' */
+  GCObject *gray;  /* list of gray objects */
+  GCObject *grayagain;  /* list of objects to be traversed atomically */
+  GCObject *weak;  /* list of weak tables (to be cleared) */
+  GCObject *tmudata;  /* last element of list of userdata to be GC */
+  Mbuffer buff;  /* temporary buffer for string concatentation */
+  lu_mem GCthreshold;
+  lu_mem totalbytes;  /* number of bytes currently allocated */
+  lu_mem estimate;  /* an estimate of number of bytes actually in use */
+  lu_mem gcdept;  /* how much GC is `behind schedule' */
+  int gcpause;  /* size of pause between successive GCs */
+  int gcstepmul;  /* GC `granularity' */
+  lua_CFunction panic;  /* to be called in unprotected errors */
+  TValue l_registry;
+  struct lua_State *mainthread;
+  UpVal uvhead;  /* head of double-linked list of all open upvalues */
+  struct Table *mt[NUM_TAGS];  /* metatables for basic types */
+  TString *tmname[TM_N];  /* array with tag-method names */
+} global_State;
+
+
+/*
+** `per thread' state
+*/
+struct lua_State {
+  CommonHeader;
+  StkId top;  /* first free slot in the stack */
+  StkId base;  /* base of current function */
+  global_State *l_G;
+  CallInfo *ci;  /* call info for current function */
+  const Instruction *savedpc;  /* `savedpc' of current function */
+  StkId stack_last;  /* last free slot in the stack */
+  StkId stack;  /* stack base */
+  int stacksize;
+  CallInfo *end_ci;  /* points after end of ci array*/
+  CallInfo *base_ci;  /* array of CallInfo's */
+  int size_ci;  /* size of array `base_ci' */
+  unsigned short nCcalls;  /* number of nested C calls */
+  lu_byte hookmask;
+  lu_byte allowhook;
+  lu_byte status;
+  int basehookcount;
+  int hookcount;
+  lua_Hook hook;
+  TValue l_gt;  /* table of globals */
+  TValue env;  /* temporary place for environments */
+  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) */
+};
+
+
+#define G(L)	(L->l_G)
+
+
+/*
+** Union of all collectable objects
+*/
+union GCObject {
+  GCheader gch;
+  union TString ts;
+  union Udata u;
+  union Closure cl;
+  struct Table h;
+  struct Proto p;
+  struct UpVal uv;
+  struct lua_State th;  /* thread */
+};
+
+
+/* macros to convert a GCObject into a specific value */
+#define rawgco2ts(o)	check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts))
+#define gco2ts(o)	(&rawgco2ts(o)->tsv)
+#define rawgco2u(o)	check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
+#define gco2u(o)	(&rawgco2u(o)->uv)
+#define gco2cl(o)	check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl))
+#define gco2h(o)	check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
+#define gco2p(o)	check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
+#define gco2uv(o)	check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
+#define ngcotouv(o) \
+	check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
+#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)))
+
+
+LUAI_FUNC lua_State *luaE_newthread (lua_State *L);
+LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
+
+#endif
+

lstring.c

@@ -0,0 +1,111 @@
+/*
+** $Id: lstring.c,v 2.6 2005/01/18 17:18:09 roberto Exp roberto $
+** String table (keeps all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lstring_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+
+
+
+void luaS_resize (lua_State *L, int newsize) {
+  GCObject **newhash;
+  stringtable *tb;
+  int i;
+  if (G(L)->gcstate == GCSsweepstring)
+    return;  /* cannot resize during GC traverse */
+  newhash = luaM_newvector(L, newsize, GCObject *);
+  tb = &G(L)->strt;
+  for (i=0; i<newsize; i++) newhash[i] = NULL;
+  /* rehash */
+  for (i=0; i<tb->size; i++) {
+    GCObject *p = tb->hash[i];
+    while (p) {  /* for each node in the list */
+      GCObject *next = p->gch.next;  /* save next */
+      unsigned int h = gco2ts(p)->hash;
+      int h1 = lmod(h, newsize);  /* new position */
+      lua_assert(cast(int, h%newsize) == lmod(h, newsize));
+      p->gch.next = newhash[h1];  /* chain it */
+      newhash[h1] = p;
+      p = next;
+    }
+  }
+  luaM_freearray(L, tb->hash, tb->size, TString *);
+  tb->size = newsize;
+  tb->hash = newhash;
+}
+
+
+static TString *newlstr (lua_State *L, const char *str, size_t l,
+                                       unsigned int h) {
+  TString *ts;
+  stringtable *tb;
+  if (l+1 > (MAX_SIZET - sizeof(TString))/sizeof(char))
+    luaM_toobig(L);
+  ts = cast(TString *, luaM_malloc(L, (l+1)*sizeof(char)+sizeof(TString)));
+  ts->tsv.len = l;
+  ts->tsv.hash = h;
+  ts->tsv.marked = luaC_white(G(L));
+  ts->tsv.tt = LUA_TSTRING;
+  ts->tsv.reserved = 0;
+  memcpy(ts+1, str, l*sizeof(char));
+  ((char *)(ts+1))[l] = '\0';  /* ending 0 */
+  tb = &G(L)->strt;
+  h = lmod(h, tb->size);
+  ts->tsv.next = tb->hash[h];  /* chain new entry */
+  tb->hash[h] = obj2gco(ts);
+  tb->nuse++;
+  if (tb->nuse > cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
+    luaS_resize(L, tb->size*2);  /* too crowded */
+  return ts;
+}
+
+
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
+  GCObject *o;
+  unsigned int h = cast(unsigned int, l);  /* seed */
+  size_t step = (l>>5)+1;  /* if string is too long, don't hash all its chars */
+  size_t l1;
+  for (l1=l; l1>=step; l1-=step)  /* compute hash */
+    h = h ^ ((h<<5)+(h>>2)+cast(unsigned char, str[l1-1]));
+  for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
+       o != NULL;
+       o = o->gch.next) {
+    TString *ts = rawgco2ts(o);
+    if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0)) {
+      /* string may be dead */
+      if (isdead(G(L), o)) changewhite(o);
+      return ts;
+    }
+  }
+  return newlstr(L, str, l, h);  /* not found */
+}
+
+
+Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
+  Udata *u;
+  if (s > MAX_SIZET - sizeof(Udata))
+    luaM_toobig(L);
+  u = cast(Udata *, luaM_malloc(L, s + sizeof(Udata)));
+  u->uv.marked = luaC_white(G(L));  /* is not finalized */
+  u->uv.tt = LUA_TUSERDATA;
+  u->uv.len = s;
+  u->uv.metatable = NULL;
+  u->uv.env = e;
+  /* chain it on udata list (after main thread) */
+  u->uv.next = G(L)->mainthread->next;
+  G(L)->mainthread->next = obj2gco(u);
+  return u;
+}
+

lstring.h

@@ -0,0 +1,31 @@
+/*
+** $Id: lstring.h,v 1.42 2005/02/23 17:30:22 roberto Exp roberto $
+** String table (keep all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstring_h
+#define lstring_h
+
+
+#include "lgc.h"
+#include "lobject.h"
+#include "lstate.h"
+
+
+#define sizestring(s)	(sizeof(union TString)+((s)->len+1)*sizeof(char))
+
+#define sizeudata(u)	(sizeof(union Udata)+(u)->len)
+
+#define luaS_new(L, s)	(luaS_newlstr(L, s, strlen(s)))
+#define luaS_newliteral(L, s)	(luaS_newlstr(L, "" s, \
+                                 (sizeof(s)/sizeof(char))-1))
+
+#define luaS_fix(s)	l_setbit((s)->tsv.marked, FIXEDBIT)
+
+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 TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
+
+
+#endif

lstrlib.c

@@ -0,0 +1,829 @@
+/*
+** $Id: lstrlib.c,v 1.122 2005/08/15 14:12:32 roberto Exp roberto $
+** Standard library for string operations and pattern-matching
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lstrlib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+/* macro to `unsign' a character */
+#define uchar(c)        ((unsigned char)(c))
+
+
+
+static int str_len (lua_State *L) {
+  size_t l;
+  luaL_checklstring(L, 1, &l);
+  lua_pushinteger(L, l);
+  return 1;
+}
+
+
+static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) {
+  /* relative string position: negative means back from end */
+  return (pos>=0) ? pos : (ptrdiff_t)len+pos+1;
+}
+
+
+static int str_sub (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l);
+  ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l);
+  if (start < 1) start = 1;
+  if (end > (ptrdiff_t)l) end = (ptrdiff_t)l;
+  if (start <= end)
+    lua_pushlstring(L, s+start-1, end-start+1);
+  else lua_pushliteral(L, "");
+  return 1;
+}
+
+
+static int str_reverse (lua_State *L) {
+  size_t l;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  luaL_buffinit(L, &b);
+  while (l--) luaL_addchar(&b, s[l]);
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int str_lower (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  luaL_buffinit(L, &b);
+  for (i=0; i<l; i++)
+    luaL_addchar(&b, tolower(uchar(s[i])));
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int str_upper (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  luaL_buffinit(L, &b);
+  for (i=0; i<l; i++)
+    luaL_addchar(&b, toupper(uchar(s[i])));
+  luaL_pushresult(&b);
+  return 1;
+}
+
+static int str_rep (lua_State *L) {
+  size_t l;
+  luaL_Buffer b;
+  const char *s = luaL_checklstring(L, 1, &l);
+  int n = luaL_checkint(L, 2);
+  luaL_buffinit(L, &b);
+  while (n-- > 0)
+    luaL_addlstring(&b, s, l);
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int str_byte (lua_State *L) {
+  size_t l;
+  const char *s = luaL_checklstring(L, 1, &l);
+  ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
+  ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
+  int n, i;
+  if (posi <= 0) posi = 1;
+  if ((size_t)pose > l) pose = l;
+  if (posi > pose) return 0;  /* empty interval; return no values */
+  n = pose -  posi + 1;
+  luaL_checkstack(L, n, "string slice too long");
+  for (i=0; i<n; i++)
+    lua_pushinteger(L, uchar(s[posi+i-1]));
+  return n;
+}
+
+
+static int str_char (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (i=1; i<=n; i++) {
+    int c = luaL_checkint(L, i);
+    luaL_argcheck(L, uchar(c) == c, i, "invalid value");
+    luaL_addchar(&b, uchar(c));
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static int writer (lua_State *L, const void* b, size_t size, void* B) {
+  (void)L;
+  luaL_addlstring((luaL_Buffer*) B, (const char *)b, size);
+  return 0;
+}
+
+
+static int str_dump (lua_State *L) {
+  luaL_Buffer b;
+  luaL_checktype(L, 1, LUA_TFUNCTION);
+  lua_settop(L, 1);
+  luaL_buffinit(L,&b);
+  if (lua_dump(L, writer, &b) != 0)
+    luaL_error(L, "unable to dump given function");
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+
+/*
+** {======================================================
+** PATTERN MATCHING
+** =======================================================
+*/
+
+
+#define CAP_UNFINISHED	(-1)
+#define CAP_POSITION	(-2)
+
+typedef struct MatchState {
+  const char *src_init;  /* init of source string */
+  const char *src_end;  /* end (`\0') of source string */
+  lua_State *L;
+  int level;  /* total number of captures (finished or unfinished) */
+  struct {
+    const char *init;
+    ptrdiff_t len;
+  } capture[LUA_MAXCAPTURES];
+} MatchState;
+
+
+#define L_ESC		'%'
+#define SPECIALS	"^$*+?.([%-"
+
+
+static int check_capture (MatchState *ms, int l) {
+  l -= '1';
+  if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
+    return luaL_error(ms->L, "invalid capture index");
+  return l;
+}
+
+
+static int capture_to_close (MatchState *ms) {
+  int level = ms->level;
+  for (level--; level>=0; level--)
+    if (ms->capture[level].len == CAP_UNFINISHED) return level;
+  return luaL_error(ms->L, "invalid pattern capture");
+}
+
+
+static const char *classend (MatchState *ms, const char *p) {
+  switch (*p++) {
+    case L_ESC: {
+      if (*p == '\0')
+        luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")");
+      return p+1;
+    }
+    case '[': {
+      if (*p == '^') p++;
+      do {  /* look for a `]' */
+        if (*p == '\0')
+          luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")");
+        if (*(p++) == L_ESC && *p != '\0')
+          p++;  /* skip escapes (e.g. `%]') */
+      } while (*p != ']');
+      return p+1;
+    }
+    default: {
+      return p;
+    }
+  }
+}
+
+
+static int match_class (int c, int cl) {
+  int res;
+  switch (tolower(cl)) {
+    case 'a' : res = isalpha(c); break;
+    case 'c' : res = iscntrl(c); break;
+    case 'd' : res = isdigit(c); break;
+    case 'l' : res = islower(c); break;
+    case 'p' : res = ispunct(c); break;
+    case 's' : res = isspace(c); break;
+    case 'u' : res = isupper(c); break;
+    case 'w' : res = isalnum(c); break;
+    case 'x' : res = isxdigit(c); break;
+    case 'z' : res = (c == 0); break;
+    default: return (cl == c);
+  }
+  return (islower(cl) ? res : !res);
+}
+
+
+static int matchbracketclass (int c, const char *p, const char *ec) {
+  int sig = 1;
+  if (*(p+1) == '^') {
+    sig = 0;
+    p++;  /* skip the `^' */
+  }
+  while (++p < ec) {
+    if (*p == L_ESC) {
+      p++;
+      if (match_class(c, uchar(*p)))
+        return sig;
+    }
+    else if ((*(p+1) == '-') && (p+2 < ec)) {
+      p+=2;
+      if (uchar(*(p-2)) <= c && c <= uchar(*p))
+        return sig;
+    }
+    else if (uchar(*p) == c) return sig;
+  }
+  return !sig;
+}
+
+
+static int singlematch (int c, const char *p, const char *ep) {
+  switch (*p) {
+    case '.': return 1;  /* matches any char */
+    case L_ESC: return match_class(c, uchar(*(p+1)));
+    case '[': return matchbracketclass(c, p, ep-1);
+    default:  return (uchar(*p) == c);
+  }
+}
+
+
+static const char *match (MatchState *ms, const char *s, const char *p);
+
+
+static const char *matchbalance (MatchState *ms, const char *s,
+                                   const char *p) {
+  if (*p == 0 || *(p+1) == 0)
+    luaL_error(ms->L, "unbalanced pattern");
+  if (*s != *p) return NULL;
+  else {
+    int b = *p;
+    int e = *(p+1);
+    int cont = 1;
+    while (++s < ms->src_end) {
+      if (*s == e) {
+        if (--cont == 0) return s+1;
+      }
+      else if (*s == b) cont++;
+    }
+  }
+  return NULL;  /* string ends out of balance */
+}
+
+
+static const char *max_expand (MatchState *ms, const char *s,
+                                 const char *p, const char *ep) {
+  ptrdiff_t i = 0;  /* counts maximum expand for item */
+  while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep))
+    i++;
+  /* keeps trying to match with the maximum repetitions */
+  while (i>=0) {
+    const char *res = match(ms, (s+i), ep+1);
+    if (res) return res;
+    i--;  /* else didn't match; reduce 1 repetition to try again */
+  }
+  return NULL;
+}
+
+
+static const char *min_expand (MatchState *ms, const char *s,
+                                 const char *p, const char *ep) {
+  for (;;) {
+    const char *res = match(ms, s, ep+1);
+    if (res != NULL)
+      return res;
+    else if (s<ms->src_end && singlematch(uchar(*s), p, ep))
+      s++;  /* try with one more repetition */
+    else return NULL;
+  }
+}
+
+
+static const char *start_capture (MatchState *ms, const char *s,
+                                    const char *p, int what) {
+  const char *res;
+  int level = ms->level;
+  if (level >= LUA_MAXCAPTURES) luaL_error(ms->L, "too many captures");
+  ms->capture[level].init = s;
+  ms->capture[level].len = what;
+  ms->level = level+1;
+  if ((res=match(ms, s, p)) == NULL)  /* match failed? */
+    ms->level--;  /* undo capture */
+  return res;
+}
+
+
+static const char *end_capture (MatchState *ms, const char *s,
+                                  const char *p) {
+  int l = capture_to_close(ms);
+  const char *res;
+  ms->capture[l].len = s - ms->capture[l].init;  /* close capture */
+  if ((res = match(ms, s, p)) == NULL)  /* match failed? */
+    ms->capture[l].len = CAP_UNFINISHED;  /* undo capture */
+  return res;
+}
+
+
+static const char *match_capture (MatchState *ms, const char *s, int l) {
+  size_t len;
+  l = check_capture(ms, l);
+  len = ms->capture[l].len;
+  if ((size_t)(ms->src_end-s) >= len &&
+      memcmp(ms->capture[l].init, s, len) == 0)
+    return s+len;
+  else return NULL;
+}
+
+
+static const char *match (MatchState *ms, const char *s, const char *p) {
+  init: /* using goto's to optimize tail recursion */
+  switch (*p) {
+    case '(': {  /* start capture */
+      if (*(p+1) == ')')  /* position capture? */
+        return start_capture(ms, s, p+2, CAP_POSITION);
+      else
+        return start_capture(ms, s, p+1, CAP_UNFINISHED);
+    }
+    case ')': {  /* end capture */
+      return end_capture(ms, s, p+1);
+    }
+    case L_ESC: {
+      switch (*(p+1)) {
+        case 'b': {  /* balanced string? */
+          s = matchbalance(ms, s, p+2);
+          if (s == NULL) return NULL;
+          p+=4; goto init;  /* else return match(ms, s, p+4); */
+        }
+        case 'f': {  /* frontier? */
+          const char *ep; char previous;
+          p += 2;
+          if (*p != '[')
+            luaL_error(ms->L, "missing " LUA_QL("[") " after "
+                               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) ||
+             !matchbracketclass(uchar(*s), p, ep-1)) return NULL;
+          p=ep; goto init;  /* else return match(ms, s, ep); */
+        }
+        default: {
+          if (isdigit(uchar(*(p+1)))) {  /* capture results (%0-%9)? */
+            s = match_capture(ms, s, uchar(*(p+1)));
+            if (s == NULL) return NULL;
+            p+=2; goto init;  /* else return match(ms, s, p+2) */
+          }
+          goto dflt;  /* case default */
+        }
+      }
+    }
+    case '\0': {  /* end of pattern */
+      return s;  /* match succeeded */
+    }
+    case '$': {
+      if (*(p+1) == '\0')  /* is the `$' the last char in pattern? */
+        return (s == ms->src_end) ? s : NULL;  /* check end of string */
+      else goto dflt;
+    }
+    default: dflt: {  /* it is a pattern item */
+      const char *ep = classend(ms, p);  /* points to what is next */
+      int m = s<ms->src_end && singlematch(uchar(*s), p, ep);
+      switch (*ep) {
+        case '?': {  /* optional */
+          const char *res;
+          if (m && ((res=match(ms, s+1, ep+1)) != NULL))
+            return res;
+          p=ep+1; goto init;  /* else return match(ms, s, ep+1); */
+        }
+        case '*': {  /* 0 or more repetitions */
+          return max_expand(ms, s, p, ep);
+        }
+        case '+': {  /* 1 or more repetitions */
+          return (m ? max_expand(ms, s+1, p, ep) : NULL);
+        }
+        case '-': {  /* 0 or more repetitions (minimum) */
+          return min_expand(ms, s, p, ep);
+        }
+        default: {
+          if (!m) return NULL;
+          s++; p=ep; goto init;  /* else return match(ms, s+1, ep); */
+        }
+      }
+    }
+  }
+}
+
+
+
+static const char *lmemfind (const char *s1, size_t l1,
+                               const char *s2, size_t l2) {
+  if (l2 == 0) return s1;  /* empty strings are everywhere */
+  else if (l2 > l1) return NULL;  /* avoids a negative `l1' */
+  else {
+    const char *init;  /* to search for a `*s2' inside `s1' */
+    l2--;  /* 1st char will be checked by `memchr' */
+    l1 = l1-l2;  /* `s2' cannot be found after that */
+    while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {
+      init++;   /* 1st char is already checked */
+      if (memcmp(init, s2+1, l2) == 0)
+        return init-1;
+      else {  /* correct `l1' and `s1' to try again */
+        l1 -= init-s1;
+        s1 = init;
+      }
+    }
+    return NULL;  /* not found */
+  }
+}
+
+
+static void push_onecapture (MatchState *ms, int i) {
+  ptrdiff_t l = ms->capture[i].len;
+  if (l == CAP_UNFINISHED) luaL_error(ms->L, "unfinished capture");
+  if (l == CAP_POSITION)
+    lua_pushinteger(ms->L, ms->capture[i].init - ms->src_init + 1);
+  else
+    lua_pushlstring(ms->L, ms->capture[i].init, l);
+}
+
+
+static int push_captures (MatchState *ms, const char *s, const char *e) {
+  int i;
+  luaL_checkstack(ms->L, ms->level, "too many captures");
+  if (ms->level == 0 && s) {  /* no explicit captures? */
+    lua_pushlstring(ms->L, s, e-s);  /* return whole match */
+    return 1;
+  }
+  else {  /* return all captures */
+    for (i=0; i<ms->level; i++)
+      push_onecapture(ms, i);
+    return ms->level;  /* number of strings pushed */
+  }
+}
+
+
+static int str_find_aux (lua_State *L, int find) {
+  size_t l1, l2;
+  const char *s = luaL_checklstring(L, 1, &l1);
+  const char *p = luaL_checklstring(L, 2, &l2);
+  ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;
+  if (init < 0) init = 0;
+  else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;
+  if (find && (lua_toboolean(L, 4) ||  /* explicit request? */
+      strpbrk(p, SPECIALS) == NULL)) {  /* or no special characters? */
+    /* do a plain search */
+    const char *s2 = lmemfind(s+init, l1-init, p, l2);
+    if (s2) {
+      lua_pushinteger(L, s2-s+1);
+      lua_pushinteger(L, s2-s+l2);
+      return 2;
+    }
+  }
+  else {
+    MatchState ms;
+    int anchor = (*p == '^') ? (p++, 1) : 0;
+    const char *s1=s+init;
+    ms.L = L;
+    ms.src_init = s;
+    ms.src_end = s+l1;
+    do {
+      const char *res;
+      ms.level = 0;
+      if ((res=match(&ms, s1, p)) != NULL) {
+        if (find) {
+          lua_pushinteger(L, s1-s+1);  /* start */
+          lua_pushinteger(L, res-s);   /* end */
+#if defined(LUA_COMPAT_FIND)
+          return push_captures(&ms, NULL, 0) + 2;
+#else
+          return 2;
+#endif
+
+        }
+        else
+          return push_captures(&ms, s1, res);
+      }
+    } while (s1++ < ms.src_end && !anchor);
+  }
+  lua_pushnil(L);  /* not found */
+  return 1;
+}
+
+
+static int str_find (lua_State *L) {
+  return str_find_aux(L, 1);
+}
+
+
+static int str_match (lua_State *L) {
+  return str_find_aux(L, 0);
+}
+
+
+static int gmatch_aux (lua_State *L) {
+  MatchState ms;
+  size_t ls;
+  const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls);
+  const char *p = lua_tostring(L, lua_upvalueindex(2));
+  const char *src;
+  ms.L = L;
+  ms.src_init = s;
+  ms.src_end = s+ls;
+  for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3));
+       src <= ms.src_end;
+       src++) {
+    const char *e;
+    ms.level = 0;
+    if ((e = match(&ms, src, p)) != NULL) {
+      lua_Integer newstart = e-s;
+      if (e == src) newstart++;  /* empty match? go at least one position */
+      lua_pushinteger(L, newstart);
+      lua_replace(L, lua_upvalueindex(3));
+      return push_captures(&ms, src, e);
+    }
+  }
+  return 0;  /* not found */
+}
+
+
+static int gmatch (lua_State *L) {
+  luaL_checkstring(L, 1);
+  luaL_checkstring(L, 2);
+  lua_settop(L, 2);
+  lua_pushinteger(L, 0);
+  lua_pushcclosure(L, gmatch_aux, 3);
+  return 1;
+}
+
+
+static int gfind_nodef (lua_State *L) {
+  return luaL_error(L, LUA_QL("string.gfind") " was renamed to "
+                       LUA_QL("string.gmatch"));
+}
+
+
+static void add_s (MatchState *ms, luaL_Buffer *b,
+                   const char *s, const char *e) {
+  lua_State *L = ms->L;
+  if (lua_isstring(L, 3)) {
+    size_t l;
+    const char *news = lua_tolstring(L, 3, &l);
+    size_t i;
+    for (i=0; i<l; i++) {
+      if (news[i] != L_ESC)
+        luaL_addchar(b, news[i]);
+      else {
+        i++;  /* skip ESC */
+        if (!isdigit(uchar(news[i])))
+          luaL_addchar(b, news[i]);
+        else {
+          if (news[i] == '0')
+            lua_pushlstring(L, s, e - s);  /* add whole match */
+          else {
+            int level = check_capture(ms, news[i]);
+            push_onecapture(ms, level);
+          }
+          luaL_addvalue(b);  /* add capture to accumulated result */
+        }
+      }
+    }
+  }
+  else {  /* is a function */
+    int n;
+    lua_pushvalue(L, 3);
+    n = push_captures(ms, s, e);
+    lua_call(L, n, 1);
+    if (lua_isstring(L, -1))
+      luaL_addvalue(b);  /* add return to accumulated result */
+    else
+      lua_pop(L, 1);  /* function result is not a string: pop it */
+  }
+}
+
+
+static int str_gsub (lua_State *L) {
+  size_t srcl;
+  const char *src = luaL_checklstring(L, 1, &srcl);
+  const char *p = luaL_checkstring(L, 2);
+  int max_s = luaL_optint(L, 4, srcl+1);
+  int anchor = (*p == '^') ? (p++, 1) : 0;
+  int n = 0;
+  MatchState ms;
+  luaL_Buffer b;
+  luaL_argcheck(L,
+    lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),
+    3, "string or function expected");
+  luaL_buffinit(L, &b);
+  ms.L = L;
+  ms.src_init = src;
+  ms.src_end = src+srcl;
+  while (n < max_s) {
+    const char *e;
+    ms.level = 0;
+    e = match(&ms, src, p);
+    if (e) {
+      n++;
+      add_s(&ms, &b, src, e);
+    }
+    if (e && e>src) /* non empty match? */
+      src = e;  /* skip it */
+    else if (src < ms.src_end)
+      luaL_addchar(&b, *src++);
+    else break;
+    if (anchor) break;
+  }
+  luaL_addlstring(&b, src, ms.src_end-src);
+  luaL_pushresult(&b);
+  lua_pushinteger(L, n);  /* number of substitutions */
+  return 2;
+}
+
+/* }====================================================== */
+
+
+/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
+#define MAX_ITEM	512
+/* maximum size of each format specification (such as '%-099.99d') */
+#define MAX_FORMAT	20
+
+
+static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
+  size_t l;
+  const char *s = luaL_checklstring(L, arg, &l);
+  luaL_addchar(b, '"');
+  while (l--) {
+    switch (*s) {
+      case '"': case '\\': case '\n': {
+        luaL_addchar(b, '\\');
+        luaL_addchar(b, *s);
+        break;
+      }
+      case '\0': {
+        luaL_addlstring(b, "\\000", 4);
+        break;
+      }
+      default: {
+        luaL_addchar(b, *s);
+        break;
+      }
+    }
+    s++;
+  }
+  luaL_addchar(b, '"');
+}
+
+
+static const char *scanformat (lua_State *L, const char *strfrmt,
+                                 char *form, int *hasprecision) {
+  const char *p = strfrmt;
+  while (strchr("-+ #0", *p)) p++;  /* skip flags */
+  if (isdigit(uchar(*p))) p++;  /* skip width */
+  if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
+  if (*p == '.') {
+    p++;
+    *hasprecision = 1;
+    if (isdigit(uchar(*p))) p++;  /* skip precision */
+    if (isdigit(uchar(*p))) p++;  /* (2 digits at most) */
+  }
+  if (isdigit(uchar(*p)))
+    luaL_error(L, "invalid format (width or precision too long)");
+  if (p-strfrmt+2 > MAX_FORMAT)  /* +2 to include `%' and the specifier */
+    luaL_error(L, "invalid format (too long)");
+  form[0] = L_ESC;
+  strncpy(form+1, strfrmt, p-strfrmt+1);
+  form[p-strfrmt+2] = 0;
+  return p;
+}
+
+
+static int str_format (lua_State *L) {
+  int arg = 1;
+  size_t sfl;
+  const char *strfrmt = luaL_checklstring(L, arg, &sfl);
+  const char *strfrmt_end = strfrmt+sfl;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  while (strfrmt < strfrmt_end) {
+    if (*strfrmt != L_ESC)
+      luaL_addchar(&b, *strfrmt++);
+    else if (*++strfrmt == L_ESC)
+      luaL_addchar(&b, *strfrmt++);  /* %% */
+    else { /* format item */
+      char form[MAX_FORMAT];  /* to store the format (`%...') */
+      char buff[MAX_ITEM];  /* to store the formatted item */
+      int hasprecision = 0;
+      arg++;
+      strfrmt = scanformat(L, strfrmt, form, &hasprecision);
+      switch (*strfrmt++) {
+        case 'c':  case 'd':  case 'i': {
+          sprintf(buff, form, luaL_checkint(L, arg));
+          break;
+        }
+        case 'o':  case 'u':  case 'x':  case 'X': {
+          sprintf(buff, form, (unsigned int)(luaL_checknumber(L, arg)));
+          break;
+        }
+        case 'e':  case 'E': case 'f':
+        case 'g': case 'G': {
+          sprintf(buff, form, luaL_checknumber(L, arg));
+          break;
+        }
+        case 'q': {
+          addquoted(L, &b, arg);
+          continue;  /* skip the 'addsize' at the end */
+        }
+        case 's': {
+          size_t l;
+          const char *s = luaL_checklstring(L, arg, &l);
+          if (!hasprecision && l >= 100) {
+            /* no precision and string is too long to be formatted;
+               keep original string */
+            lua_pushvalue(L, arg);
+            luaL_addvalue(&b);
+            continue;  /* skip the `addsize' at the end */
+          }
+          else {
+            sprintf(buff, form, s);
+            break;
+          }
+        }
+        default: {  /* also treat cases `pnLlh' */
+          return luaL_error(L, "invalid option to " LUA_QL("format"));
+        }
+      }
+      luaL_addlstring(&b, buff, strlen(buff));
+    }
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+static const luaL_Reg strlib[] = {
+  {"byte", str_byte},
+  {"char", str_char},
+  {"dump", str_dump},
+  {"find", str_find},
+  {"format", str_format},
+  {"gfind", gfind_nodef},
+  {"gmatch", gmatch},
+  {"gsub", str_gsub},
+  {"len", str_len},
+  {"lower", str_lower},
+  {"match", str_match},
+  {"rep", str_rep},
+  {"reverse", str_reverse},
+  {"sub", str_sub},
+  {"upper", str_upper},
+  {NULL, NULL}
+};
+
+
+static void createmetatable (lua_State *L) {
+  lua_newtable(L);  /* create metatable for strings */
+  lua_pushliteral(L, "");  /* dummy string */
+  lua_pushvalue(L, -2);
+  lua_setmetatable(L, -2);  /* set string metatable */
+  lua_pop(L, 1);  /* pop dummy string */
+  lua_pushvalue(L, -2);  /* string library... */
+  lua_setfield(L, -2, "__index");  /* ...is the __index metamethod */
+  lua_pop(L, 1);  /* pop metatable */
+}
+
+
+/*
+** Open string library
+*/
+LUALIB_API int luaopen_string (lua_State *L) {
+  luaL_register(L, LUA_STRLIBNAME, strlib);
+#if defined(LUA_COMPAT_GFIND)
+  lua_getfield(L, -1, "gmatch");
+  lua_setfield(L, -2, "gfind");
+#endif
+  createmetatable(L);
+  return 1;
+}
+

ltable.c

@@ -0,0 +1,574 @@
+/*
+** $Id: ltable.c,v 2.25 2005/05/31 14:25:18 roberto Exp roberto $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+
+/*
+** Implementation of tables (aka arrays, objects, or hash tables).
+** Tables keep its elements in two parts: an array part and a hash part.
+** Non-negative integer keys are all candidates to be kept in the array
+** part. The actual size of the array is the largest `n' such that at
+** least half the slots between 0 and n are in use.
+** Hash uses a mix of chained scatter table with Brent's variation.
+** A main invariant of these tables is that, if an element is not
+** in its main position (i.e. the `original' position that its hash gives
+** to it), then the colliding element is in its own main position.
+** Hence even when the load factor reaches 100%, performance remains good.
+*/
+
+#include <math.h>
+#include <string.h>
+
+#define ltable_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "ltable.h"
+
+
+/*
+** max size of array part is 2^MAXBITS
+*/
+#if LUAI_BITSINT > 26
+#define MAXBITS		26
+#else
+#define MAXBITS		(LUAI_BITSINT-2)
+#endif
+
+#define MAXASIZE	(1 << MAXBITS)
+
+
+#define hashpow2(t,n)      (gnode(t, lmod((n), sizenode(t))))
+  
+#define hashstr(t,str)  hashpow2(t, (str)->tsv.hash)
+#define hashboolean(t,p)        hashpow2(t, p)
+
+
+/*
+** for some types, it is better to avoid modulus by power of 2, as
+** they tend to have many 2 factors.
+*/
+#define hashmod(t,n)	(gnode(t, ((n) % ((sizenode(t)-1)|1))))
+
+
+#define hashpointer(t,p)	hashmod(t, IntPoint(p))
+
+
+/*
+** number of ints inside a lua_Number
+*/
+#define numints		cast(int, sizeof(lua_Number)/sizeof(int))
+
+
+
+const Node luaH_dummynode = {
+  {{NULL}, LUA_TNIL},  /* value */
+  {{NULL}, LUA_TNIL, NULL}  /* key */
+};
+
+
+/*
+** hash for lua_Numbers
+*/
+static Node *hashnum (const Table *t, lua_Number n) {
+  unsigned int a[numints];
+  int i;
+  n += 1;  /* normalize number (avoid -0) */
+  lua_assert(sizeof(a) <= sizeof(n));
+  memcpy(a, &n, sizeof(a));
+  for (i = 1; i < numints; i++) a[0] += a[i];
+  return hashmod(t, a[0]);
+}
+
+
+
+/*
+** returns the `main' position of an element in a table (that is, the index
+** of its hash value)
+*/
+Node *luaH_mainposition (const Table *t, const TValue *key) {
+  switch (ttype(key)) {
+    case LUA_TNUMBER:
+      return hashnum(t, nvalue(key));
+    case LUA_TSTRING:
+      return hashstr(t, rawtsvalue(key));
+    case LUA_TBOOLEAN:
+      return hashboolean(t, bvalue(key));
+    case LUA_TLIGHTUSERDATA:
+      return hashpointer(t, pvalue(key));
+    default:
+      return hashpointer(t, gcvalue(key));
+  }
+}
+
+
+/*
+** returns the index for `key' if `key' is an appropriate key to live in
+** the array part of the table, -1 otherwise.
+*/
+static int arrayindex (const TValue *key) {
+  if (ttisnumber(key)) {
+    lua_Number n = nvalue(key);
+    int k;
+    lua_number2int(k, n);
+    if (luai_numeq(L, cast(lua_Number, k), nvalue(key)))
+      return k;
+  }
+  return -1;  /* `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 signalled by -1.
+*/
+static int findindex (lua_State *L, Table *t, StkId key) {
+  int i;
+  if (ttisnil(key)) return -1;  /* first iteration */
+  i = arrayindex(key);
+  if (0 < i && i <= t->sizearray)  /* is `key' inside array part? */
+    return i-1;  /* yes; that's the index (corrected to C) */
+  else {
+    Node *n = luaH_mainposition(t, key);
+    do {  /* check whether `key' is somewhere in the chain */
+      /* key may be dead already, but it is ok to use it in `next' */
+      if (luaO_rawequalObj(key2tval(n), key) ||
+            (ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) &&
+             gcvalue(gkey(n)) == gcvalue(key))) {
+        i = cast(int, n - gnode(t, 0));  /* key index in hash table */
+        /* hash elements are numbered after array ones */
+        return i + t->sizearray;
+      }
+      else n = gnext(n);
+    } while (n);
+    luaG_runerror(L, "invalid key to " LUA_QL("next"));  /* key not found */
+    return 0;  /* to avoid warnings */
+  }
+}
+
+
+int luaH_next (lua_State *L, Table *t, StkId key) {
+  int i = findindex(L, t, key);  /* find original element */
+  for (i++; i < t->sizearray; i++) {  /* try first array part */
+    if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
+      setnvalue(key, cast(lua_Number, i+1));
+      setobj2s(L, key+1, &t->array[i]);
+      return 1;
+    }
+  }
+  for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */
+    if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */
+      setobj2s(L, key, key2tval(gnode(t, i)));
+      setobj2s(L, key+1, gval(gnode(t, i)));
+      return 1;
+    }
+  }
+  return 0;  /* no more elements */
+}
+
+
+/*
+** {=============================================================
+** Rehash
+** ==============================================================
+*/
+
+
+static int computesizes (int nums[], int *narray) {
+  int i;
+  int twotoi;  /* 2^i */
+  int a = 0;  /* number of elements smaller than 2^i */
+  int na = 0;  /* number of elements to go to array part */
+  int n = 0;  /* optimal size for array part */
+  for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
+    if (nums[i] > 0) {
+      a += nums[i];
+      if (a > twotoi/2) {  /* more than half elements present? */
+        n = twotoi;  /* optimal size (till now) */
+        na = a;  /* all elements smaller than n will go to array part */
+      }
+    }
+    if (a == *narray) break;  /* all elements already counted */
+  }
+  *narray = n;
+  lua_assert(*narray/2 <= na && na <= *narray);
+  return na;
+}
+
+
+static int countint (const TValue *key, int *nums) {
+  int k = arrayindex(key);
+  if (0 < k && k <= MAXASIZE) {  /* is `key' an appropriate array index? */
+    nums[ceillog2(k)]++;  /* count as such */
+    return 1;
+  }
+  else
+    return 0;
+}
+
+
+static int numusearray (const Table *t, int *nums) {
+  int lg;
+  int ttlg;  /* 2^lg */
+  int ause = 0;  /* summation of `nums' */
+  int i = 1;  /* count to traverse all array keys */
+  for (lg=0, ttlg=1; lg<=MAXBITS; lg++, ttlg*=2) {  /* for each slice */
+    int lc = 0;  /* counter */
+    int lim = ttlg;
+    if (lim > t->sizearray) {
+      lim = t->sizearray;  /* adjust upper limit */
+      if (i > lim)
+        break;  /* no more elements to count */
+    }
+    /* count elements in range (2^(lg-1), 2^lg] */
+    for (; i <= lim; i++) {
+      if (!ttisnil(&t->array[i-1]))
+        lc++;
+    }
+    nums[lg] += lc;
+    ause += lc;
+  }
+  return ause;
+}
+
+
+static int numusehash (const Table *t, int *nums, int *pnasize) {
+  int totaluse = 0;  /* total number of elements */
+  int ause = 0;  /* summation of `nums' */
+  int i = sizenode(t);
+  while (i--) {
+    Node *n = &t->node[i];
+    if (!ttisnil(gval(n))) {
+      ause += countint(key2tval(n), nums);
+      totaluse++;
+    }
+  }
+  *pnasize += ause;
+  return totaluse;
+}
+
+
+static void setarrayvector (lua_State *L, Table *t, int size) {
+  int i;
+  luaM_reallocvector(L, t->array, t->sizearray, size, TValue);
+  for (i=t->sizearray; i<size; i++)
+     setnilvalue(&t->array[i]);
+  t->sizearray = size;
+}
+
+
+static void setnodevector (lua_State *L, Table *t, int size) {
+  int lsize;
+  if (size == 0) {  /* no elements to hash part? */
+    t->node = cast(Node *, &luaH_dummynode);  /* use common `dummynode' */
+    lsize = 0;
+  }
+  else {
+    int i;
+    lsize = ceillog2(size);
+    if (lsize > MAXBITS)
+      luaG_runerror(L, "table overflow");
+    size = twoto(lsize);
+    t->node = luaM_newvector(L, size, Node);
+    for (i=0; i<size; i++) {
+      gnext(&t->node[i]) = NULL;
+      setnilvalue(gkey(gnode(t, i)));
+      setnilvalue(gval(gnode(t, i)));
+    }
+  }
+  t->lsizenode = cast(lu_byte, lsize);
+  t->lastfree = gnode(t, size);  /* all positions are free */
+}
+
+
+static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
+  int i;
+  int oldasize = t->sizearray;
+  int oldhsize = t->lsizenode;
+  Node *nold = t->node;  /* save old hash ... */
+  if (nasize > oldasize)  /* array part must grow? */
+    setarrayvector(L, t, nasize);
+  /* create new hash part with appropriate size */
+  setnodevector(L, t, nhsize);  
+  if (nasize < oldasize) {  /* array part must shrink? */
+    t->sizearray = nasize;
+    /* re-insert elements from vanishing slice */
+    for (i=nasize; i<oldasize; i++) {
+      if (!ttisnil(&t->array[i]))
+        setobjt2t(L, luaH_setnum(L, t, i+1), &t->array[i]);
+    }
+    /* shrink array */
+    luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
+  }
+  /* re-insert elements from hash part */
+  for (i = twoto(oldhsize) - 1; i >= 0; i--) {
+    Node *old = nold+i;
+    if (!ttisnil(gval(old)))
+      setobjt2t(L, luaH_set(L, t, key2tval(old)), gval(old));
+  }
+  if (nold != &luaH_dummynode)
+    luaM_freearray(L, nold, twoto(oldhsize), Node);  /* free old array */
+}
+
+
+void luaH_resizearray (lua_State *L, Table *t, int nasize) {
+  int nsize = (t->node == &luaH_dummynode) ? 0 : sizenode(t);
+  resize(L, t, nasize, nsize);
+}
+
+
+static void rehash (lua_State *L, Table *t, const TValue *ek) {
+  int nasize, na;
+  int nums[MAXBITS+1];  /* nums[i] = number of keys between 2^(i-1) and 2^i */
+  int i;
+  int totaluse;
+  for (i=0; i<=MAXBITS; i++) nums[i] = 0;  /* reset counts */
+  nasize = numusearray(t, nums);  /* count keys in array part */
+  totaluse = nasize;  /* all those keys are integer keys */
+  totaluse += numusehash(t, nums, &nasize);  /* count keys in hash part */
+  /* count extra key */
+  nasize += countint(ek, nums);
+  totaluse++;
+  /* compute new size for array part */
+  na = computesizes(nums, &nasize);
+  /* resize the table to new computed sizes */
+  resize(L, t, nasize, totaluse - na);
+}
+
+
+
+/*
+** }=============================================================
+*/
+
+
+Table *luaH_new (lua_State *L, int narray, int nhash) {
+  Table *t = luaM_new(L, Table);
+  luaC_link(L, obj2gco(t), LUA_TTABLE);
+  t->metatable = NULL;
+  t->flags = cast(lu_byte, ~0);
+  /* temporary values (kept only if some malloc fails) */
+  t->array = NULL;
+  t->sizearray = 0;
+  t->lsizenode = 0;
+  t->node = cast(Node *, &luaH_dummynode);
+  setarrayvector(L, t, narray);
+  setnodevector(L, t, nhash);
+  return t;
+}
+
+
+void luaH_free (lua_State *L, Table *t) {
+  if (t->node != &luaH_dummynode)
+    luaM_freearray(L, t->node, sizenode(t), Node);
+  luaM_freearray(L, t->array, t->sizearray, TValue);
+  luaM_free(L, t);
+}
+
+
+static Node *getfreepos (Table *t) {
+  while (t->lastfree-- > t->node) {
+    if (ttisnil(gkey(t->lastfree)))
+      return t->lastfree;
+  }
+  return NULL;  /* could not find a free place */
+}
+
+
+
+/*
+** inserts a new key into a hash table; first, check whether key's main 
+** position is free. If not, check whether colliding node is in its main 
+** position or not: if it is not, move colliding node to an empty place and 
+** put new key in its main position; otherwise (colliding node is in its main 
+** position), new key goes to an empty position. 
+*/
+static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
+  Node *mp = luaH_mainposition(t, key);
+  if (!ttisnil(gval(mp)) || mp == &luaH_dummynode) {
+    Node *othern;
+    Node *n = getfreepos(t);  /* get a free place */
+    if (n == NULL) {  /* cannot find a free place? */
+      rehash(L, t, key);  /* grow table */
+      return luaH_set(L, t, key);  /* re-insert key into grown table */
+    }
+    lua_assert(n != &luaH_dummynode);
+    othern = luaH_mainposition(t, key2tval(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 */
+      gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
+      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
+      gnext(mp) = NULL;  /* now `mp' is free */
+      setnilvalue(gval(mp));
+    }
+    else {  /* colliding node is in its own main position */
+      /* new node will go into free position */
+      gnext(n) = gnext(mp);  /* chain new position */
+      gnext(mp) = n;
+      mp = n;
+    }
+  }
+  gkey(mp)->value = key->value; gkey(mp)->tt = key->tt;
+  luaC_barriert(L, t, key);
+  lua_assert(ttisnil(gval(mp)));
+  return gval(mp);
+}
+
+
+/*
+** search function for integers
+*/
+const TValue *luaH_getnum (Table *t, int key) {
+  /* (1 <= key && key <= t->sizearray) */
+  if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
+    return &t->array[key-1];
+  else {
+    lua_Number nk = cast(lua_Number, key);
+    Node *n = hashnum(t, nk);
+    do {  /* check whether `key' is somewhere in the chain */
+      if (ttisnumber(gkey(n)) && luai_numeq(L, nvalue(gkey(n)), nk))
+        return gval(n);  /* that's it */
+      else n = gnext(n);
+    } while (n);
+    return &luaO_nilobject;
+  }
+}
+
+
+/*
+** search function for strings
+*/
+const TValue *luaH_getstr (Table *t, TString *key) {
+  Node *n = hashstr(t, key);
+  do {  /* check whether `key' is somewhere in the chain */
+    if (ttisstring(gkey(n)) && rawtsvalue(gkey(n)) == key)
+      return gval(n);  /* that's it */
+    else n = gnext(n);
+  } while (n);
+  return &luaO_nilobject;
+}
+
+
+/*
+** main search function
+*/
+const TValue *luaH_get (Table *t, const TValue *key) {
+  switch (ttype(key)) {
+    case LUA_TNIL: return &luaO_nilobject;
+    case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
+    case LUA_TNUMBER: {
+      int k;
+      lua_Number n = nvalue(key);
+      lua_number2int(k, n);
+      if (luai_numeq(L, cast(lua_Number, k), nvalue(key))) /* index is int? */
+        return luaH_getnum(t, k);  /* use specialized version */
+      /* else go through */
+    }
+    default: {
+      Node *n = luaH_mainposition(t, key);
+      do {  /* check whether `key' is somewhere in the chain */
+        if (luaO_rawequalObj(key2tval(n), key))
+          return gval(n);  /* that's it */
+        else n = gnext(n);
+      } while (n);
+      return &luaO_nilobject;
+    }
+  }
+}
+
+
+TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
+  const TValue *p = luaH_get(t, key);
+  t->flags = 0;
+  if (p != &luaO_nilobject)
+    return cast(TValue *, p);
+  else {
+    if (ttisnil(key)) luaG_runerror(L, "table index is nil");
+    else if (ttisnumber(key) && !luai_numeq(L, nvalue(key), nvalue(key)))
+      luaG_runerror(L, "table index is NaN");
+    return newkey(L, t, key);
+  }
+}
+
+
+TValue *luaH_setnum (lua_State *L, Table *t, int key) {
+  const TValue *p = luaH_getnum(t, key);
+  if (p != &luaO_nilobject)
+    return cast(TValue *, p);
+  else {
+    TValue k;
+    setnvalue(&k, cast(lua_Number, key));
+    return newkey(L, t, &k);
+  }
+}
+
+
+TValue *luaH_setstr (lua_State *L, Table *t, TString *key) {
+  const TValue *p = luaH_getstr(t, key);
+  if (p != &luaO_nilobject)
+    return cast(TValue *, p);
+  else {
+    TValue k;
+    setsvalue(L, &k, key);
+    return newkey(L, t, &k);
+  }
+}
+
+
+static int unbound_search (Table *t, unsigned int j) {
+  unsigned int i = j;  /* i is zero or a present index */
+  j = j+1;
+  /* find `i' and `j' such that i is present and j is not */
+  while (!ttisnil(luaH_getnum(t, j))) {
+    i = j;
+    j = i*2;
+    if (j > cast(unsigned int, MAX_INT)) {  /* overflow? */
+      /* table was built with bad purposes: resort to linear search */
+      i = 1;
+      while (!ttisnil(luaH_getnum(t, i))) i++;
+      return i - 1;
+    }
+  }
+  /* now do a binary search between them */
+  while (i < j-1) {
+    unsigned int m = (i+j)/2;
+    if (ttisnil(luaH_getnum(t, m))) j = m;
+    else i = m;
+  }
+  return i;
+}
+
+
+/*
+** Try to find a boundary in table `t'. A `boundary' is an integer index
+** such that t[i] is non-nil and t[i+1] is nil (and 0 if t[1] is nil).
+*/
+int luaH_getn (Table *t) {
+  unsigned int j = t->sizearray;
+  if (j > 0 && ttisnil(&t->array[j - 1])) {
+    /* there is a boundary in the array part: (binary) search for it */
+    unsigned int i = 0;
+    while (j - i > 1) {
+      unsigned int m = (i+j)/2;
+      if (ttisnil(&t->array[m - 1])) j = m;
+      else i = m;
+    }
+    return i;
+  }
+  /* else must find a boundary in hash part */
+  else if (t->node == &luaH_dummynode)  /* hash part is empty? */
+    return j;  /* that is easy... */
+  else return unbound_search(t, j);
+}
+

ltable.h

@@ -0,0 +1,39 @@
+/*
+** $Id: ltable.h,v 2.7 2005/04/25 19:24:10 roberto Exp roberto $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltable_h
+#define ltable_h
+
+#include "lobject.h"
+
+
+#define gnode(t,i)	(&(t)->node[i])
+#define gkey(n)		(&(n)->i_key)
+#define gval(n)		(&(n)->i_val)
+#define gnext(n)	((n)->i_key.next)
+
+#define key2tval(n)	(cast(const TValue *, gkey(n)))
+
+
+LUAI_DATA const Node luaH_dummynode;
+
+LUAI_FUNC const TValue *luaH_getnum (Table *t, int key);
+LUAI_FUNC TValue *luaH_setnum (lua_State *L, Table *t, int key);
+LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
+LUAI_FUNC TValue *luaH_setstr (lua_State *L, Table *t, TString *key);
+LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
+LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
+LUAI_FUNC Table *luaH_new (lua_State *L, int narray, int lnhash);
+LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize);
+LUAI_FUNC void luaH_free (lua_State *L, Table *t);
+LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
+LUAI_FUNC int luaH_getn (Table *t);
+
+/* exported only for debugging */
+LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
+
+
+#endif

ltablib.c

@@ -0,0 +1,256 @@
+/*
+** $Id: ltablib.c,v 1.34 2005/08/15 14:12:32 roberto Exp roberto $
+** Library for Table Manipulation
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stddef.h>
+
+#define ltablib_c
+#define LUA_LIB
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "lualib.h"
+
+
+#define aux_getn(L,n)	(luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n))
+
+
+static int foreachi (lua_State *L) {
+  int i;
+  int n = aux_getn(L, 1);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  for (i=1; i <= n; i++) {
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushinteger(L, i);  /* 1st argument */
+    lua_rawgeti(L, 1, i);  /* 2nd argument */
+    lua_call(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 1);  /* remove nil result */
+  }
+  return 0;
+}
+
+
+static int foreach (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_pushnil(L);  /* first key */
+  for (;;) {
+    if (lua_next(L, 1) == 0)
+      return 0;
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushvalue(L, -3);  /* key */
+    lua_pushvalue(L, -3);  /* value */
+    lua_call(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 2);  /* remove value and result */
+  }
+}
+
+
+static int getn (lua_State *L) {
+  lua_pushinteger(L, aux_getn(L, 1));
+  return 1;
+}
+
+
+static int setn (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+#ifndef luaL_setn
+  luaL_setn(L, 1, luaL_checkint(L, 2));
+#else
+  luaL_error(L, LUA_QL("setn") " is obsolete");
+#endif
+  lua_pushvalue(L, 1);
+  return 1;
+}
+
+
+static int tinsert (lua_State *L) {
+  int e = aux_getn(L, 1) + 1;  /* first empty element */
+  int pos;  /* where to insert new element */
+  if (lua_isnone(L, 3))  /* called with only 2 arguments */
+    pos = e;  /* insert new element at the end */
+  else {
+    int i;
+    pos = luaL_checkint(L, 2);  /* 2nd argument is the position */
+    if (pos > e) e = pos;  /* `grow' array if necessary */
+    lua_settop(L, 3);  /* function may be called with more than 3 args */
+    for (i = e; i > pos; i--) {  /* move up elements */
+      lua_rawgeti(L, 1, i-1);
+      lua_rawseti(L, 1, i);  /* t[i] = t[i-1] */
+    }
+  }
+  luaL_setn(L, 1, e);  /* new size */
+  lua_rawseti(L, 1, pos);  /* t[pos] = v */
+  return 0;
+}
+
+
+static int tremove (lua_State *L) {
+  int e = aux_getn(L, 1);
+  int pos = luaL_optint(L, 2, e);
+  if (e == 0) return 0;  /* table is `empty' */
+  luaL_setn(L, 1, e - 1);  /* t.n = n-1 */
+  lua_rawgeti(L, 1, pos);  /* result = t[pos] */
+  for ( ;pos<e; pos++) {
+    lua_rawgeti(L, 1, pos+1);
+    lua_rawseti(L, 1, pos);  /* t[pos] = t[pos+1] */
+  }
+  lua_pushnil(L);
+  lua_rawseti(L, 1, e);  /* t[e] = nil */
+  return 1;
+}
+
+
+static int tconcat (lua_State *L) {
+  luaL_Buffer b;
+  size_t lsep;
+  const char *sep = luaL_optlstring(L, 2, "", &lsep);
+  int i = luaL_optint(L, 3, 1);
+  int last = luaL_optint(L, 4, -2);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  if (last == -2)
+    last = luaL_getn(L, 1);
+  luaL_buffinit(L, &b);
+  for (; i <= last; i++) {
+    lua_rawgeti(L, 1, i);
+    luaL_argcheck(L, lua_isstring(L, -1), 1, "table contains non-strings");
+    luaL_addvalue(&b);
+    if (i != last)
+      luaL_addlstring(&b, sep, lsep);
+  }
+  luaL_pushresult(&b);
+  return 1;
+}
+
+
+
+/*
+** {======================================================
+** Quicksort
+** (based on `Algorithms in MODULA-3', Robert Sedgewick;
+**  Addison-Wesley, 1993.)
+*/
+
+
+static void set2 (lua_State *L, int i, int j) {
+  lua_rawseti(L, 1, i);
+  lua_rawseti(L, 1, j);
+}
+
+static int sort_comp (lua_State *L, int a, int b) {
+  if (!lua_isnil(L, 2)) {  /* function? */
+    int res;
+    lua_pushvalue(L, 2);
+    lua_pushvalue(L, a-1);  /* -1 to compensate function */
+    lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */
+    lua_call(L, 2, 1);
+    res = lua_toboolean(L, -1);
+    lua_pop(L, 1);
+    return res;
+  }
+  else  /* a < b? */
+    return lua_lessthan(L, a, b);
+}
+
+static void auxsort (lua_State *L, int l, int u) {
+  while (l < u) {  /* for tail recursion */
+    int i, j;
+    /* sort elements a[l], a[(l+u)/2] and a[u] */
+    lua_rawgeti(L, 1, l);
+    lua_rawgeti(L, 1, u);
+    if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
+      set2(L, l, u);  /* swap a[l] - a[u] */
+    else
+      lua_pop(L, 2);
+    if (u-l == 1) break;  /* only 2 elements */
+    i = (l+u)/2;
+    lua_rawgeti(L, 1, i);
+    lua_rawgeti(L, 1, l);
+    if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
+      set2(L, i, l);
+    else {
+      lua_pop(L, 1);  /* remove a[l] */
+      lua_rawgeti(L, 1, u);
+      if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
+        set2(L, i, u);
+      else
+        lua_pop(L, 2);
+    }
+    if (u-l == 2) break;  /* only 3 elements */
+    lua_rawgeti(L, 1, i);  /* Pivot */
+    lua_pushvalue(L, -1);
+    lua_rawgeti(L, 1, u-1);
+    set2(L, i, u-1);
+    /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
+    i = l; j = u-1;
+    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
+      /* repeat ++i until a[i] >= P */
+      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+        if (i>u) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[i] */
+      }
+      /* repeat --j until a[j] <= P */
+      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+        if (j<l) luaL_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[j] */
+      }
+      if (j<i) {
+        lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
+        break;
+      }
+      set2(L, i, j);
+    }
+    lua_rawgeti(L, 1, u-1);
+    lua_rawgeti(L, 1, i);
+    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
+    /* adjust so that smaller half is in [j..i] and larger one in [l..u] */
+    if (i-l < u-i) {
+      j=l; i=i-1; l=i+2;
+    }
+    else {
+      j=i+1; i=u; u=j-2;
+    }
+    auxsort(L, 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);
+  luaL_checkstack(L, 40, "");  /* assume array is smaller than 2^40 */
+  if (!lua_isnoneornil(L, 2))  /* is there a 2nd argument? */
+    luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_settop(L, 2);  /* make sure there is two arguments */
+  auxsort(L, 1, n);
+  return 0;
+}
+
+/* }====================================================== */
+
+
+static const luaL_Reg tab_funcs[] = {
+  {"concat", tconcat},
+  {"foreach", foreach},
+  {"foreachi", foreachi},
+  {"getn", getn},
+  {"insert", tinsert},
+  {"remove", tremove},
+  {"setn", setn},
+  {"sort", sort},
+  {NULL, NULL}
+};
+
+
+LUALIB_API int luaopen_table (lua_State *L) {
+  luaL_register(L, LUA_TABLIBNAME, tab_funcs);
+  return 1;
+}
+

ltests.h

@@ -0,0 +1,90 @@
+/*
+** $Id: ltests.h,v 2.14 2005/05/03 19:01:17 roberto Exp roberto $
+** Internal Header for Debugging of the Lua Implementation
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltests_h
+#define ltests_h
+
+
+#include <stdlib.h>
+
+
+#define LUA_DEBUG
+
+#undef NDEBUG
+#include <assert.h>
+#undef lua_assert
+#define lua_assert(c)           assert(c)
+
+
+/* to avoid warnings, and to make sure value is really unused */
+#define UNUSED(x)       (x=0, (void)(x))
+
+
+/* memory allocator control variables */
+typedef struct Memcontrol {
+  unsigned long numblocks;
+  unsigned long total;
+  unsigned long maxmem;
+  unsigned long memlimit;
+} Memcontrol;
+
+LUAI_DATA Memcontrol memcontrol;
+
+
+/*
+** generic variable for debug tricks
+*/
+LUAI_DATA int Trick;
+
+
+void *debug_realloc (void *ud, void *block, size_t osize, size_t nsize);
+
+#ifdef lua_c
+#define luaL_newstate()	lua_newstate(debug_realloc, &memcontrol)
+#endif
+
+
+typedef struct CallInfo *pCallInfo;
+
+int lua_checkmemory (lua_State *L);
+int lua_checkpc (lua_State *L, pCallInfo ci);
+
+
+/* test for lock/unlock */
+#undef luai_userstateopen
+#undef lua_lock
+#undef lua_unlock
+#undef LUAI_EXTRASPACE
+
+LUAI_DATA int islocked;
+#define LUAI_EXTRASPACE		sizeof(double)
+#define getlock(l)	(*(cast(int **, l) - 1))
+#define luai_userstateopen(l)	getlock(l) = &islocked;
+#define lua_lock(l)     lua_assert((*getlock(l))++ == 0)
+#define lua_unlock(l)   lua_assert(--(*getlock(l)) == 0)
+
+
+int luaB_opentests (lua_State *L);
+
+#ifdef lua_c
+#define luaL_openlibs(L)	{ (luaL_openlibs)(L); luaB_opentests(L); }
+#endif
+
+
+
+/* real main will be defined at `ltests.c' */
+int l_main (int argc, char *argv[]);
+#define main	l_main
+
+
+
+/* change some sizes to give some bugs a chance */
+
+#undef LUAL_BUFFERSIZE
+#define LUAL_BUFFERSIZE		27
+#define MINSTRTABSIZE		2
+
+#endif

ltm.c

@@ -0,0 +1,75 @@
+/*
+** $Id: ltm.c,v 2.5 2005/05/05 15:34:03 roberto Exp roberto $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define ltm_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+
+
+
+const char *const luaT_typenames[] = {
+  "nil", "boolean", "userdata", "number",
+  "string", "table", "function", "userdata", "thread",
+  "proto", "upval"
+};
+
+
+void luaT_init (lua_State *L) {
+  static const char *const luaT_eventname[] = {  /* ORDER TM */
+    "__index", "__newindex",
+    "__gc", "__mode", "__eq",
+    "__add", "__sub", "__mul", "__div", "__mod",
+    "__pow", "__unm", "__len", "__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 */
+  }
+}
+
+
+/*
+** function to be used with macro "fasttm": optimized for absence of
+** tag methods
+*/
+const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
+  const TValue *tm = luaH_getstr(events, ename);
+  lua_assert(event <= TM_EQ);
+  if (ttisnil(tm)) {  /* no tag method? */
+    events->flags |= cast(lu_byte, 1u<<event);  /* cache this fact */
+    return NULL;
+  }
+  else return tm;
+}
+
+
+const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
+  Table *mt;
+  switch (ttype(o)) {
+    case LUA_TTABLE:
+      mt = hvalue(o)->metatable;
+      break;
+    case LUA_TUSERDATA:
+      mt = uvalue(o)->metatable;
+      break;
+    default:
+      mt = G(L)->mt[ttype(o)];
+  }
+  return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : &luaO_nilobject);
+}
+

ltm.h

@@ -0,0 +1,54 @@
+/*
+** $Id: ltm.h,v 2.5 2005/05/20 15:53:42 roberto Exp roberto $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltm_h
+#define ltm_h
+
+
+#include "lobject.h"
+
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER TM"
+*/
+typedef enum {
+  TM_INDEX,
+  TM_NEWINDEX,
+  TM_GC,
+  TM_MODE,
+  TM_EQ,  /* last tag method with `fast' access */
+  TM_ADD,
+  TM_SUB,
+  TM_MUL,
+  TM_DIV,
+  TM_MOD,
+  TM_POW,
+  TM_UNM,
+  TM_LEN,
+  TM_LT,
+  TM_LE,
+  TM_CONCAT,
+  TM_CALL,
+  TM_N		/* number of elements in the enum */
+} TMS;
+
+
+
+#define gfasttm(g,et,e) ((et) == NULL ? NULL : \
+  ((et)->flags & (1u<<(e))) ? NULL : luaT_gettm(et, e, (g)->tmname[e]))
+
+#define fasttm(l,et,e)	gfasttm(G(l), et, e)
+
+LUAI_DATA const char *const luaT_typenames[];
+
+
+LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);
+LUAI_FUNC const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o,
+                                                       TMS event);
+LUAI_FUNC void luaT_init (lua_State *L);
+
+#endif

lua.c

@@ -1,31 +1,367 @@
 /*
-** lua.c
-** Linguagem para Usuarios de Aplicacao
+** $Id: lua.c,v 1.149 2005/08/26 17:32:05 roberto Exp roberto $
+** Lua stand-alone interpreter
+** See Copyright Notice in lua.h
 */
 
-char *rcs_lua="$Id: $";
 
+#include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lua_c
 
 #include "lua.h"
+
+#include "lauxlib.h"
 #include "lualib.h"
 
 
-void main (int argc, char *argv[])
-{
- int i;
- iolib_open ();
- strlib_open ();
- mathlib_open ();
- if (argc < 2)
- {
-   char buffer[250];
-   while (gets(buffer) != 0)
-     lua_dostring(buffer);
- }
- else
-   for (i=1; i<argc; i++)
-    lua_dofile (argv[i]);
+
+static lua_State *globalL = NULL;
+
+static const char *progname = LUA_PROGNAME;
+
+
+
+static void lstop (lua_State *L, lua_Debug *ar) {
+  (void)ar;  /* unused arg. */
+  lua_sethook(L, NULL, 0, 0);
+  luaL_error(L, "interrupted!");
 }
 
 
+static void laction (int i) {
+  signal(i, SIG_DFL); /* if another SIGINT happens before lstop,
+                              terminate process (default action) */
+  lua_sethook(globalL, lstop, LUA_MASKCALL | LUA_MASKRET | LUA_MASKCOUNT, 1);
+}
+
+
+static void print_usage (void) {
+  fprintf(stderr,
+  "usage: %s [options] [script [args]].\n"
+  "Available options are:\n"
+  "  -        execute stdin as a file\n"
+  "  -e stat  execute string " LUA_QL("stat") "\n"
+  "  -i       enter interactive mode after executing " LUA_QL("script") "\n"
+  "  -l name  require library " LUA_QL("name") "\n"
+  "  -v       show version information\n"
+  "  --       stop handling options\n" ,
+  progname);
+  fflush(stderr);
+}
+
+
+static void l_message (const char *pname, const char *msg) {
+  if (pname) fprintf(stderr, "%s: ", pname);
+  fprintf(stderr, "%s\n", msg);
+  fflush(stderr);
+}
+
+
+static int report (lua_State *L, int status) {
+  if (status && !lua_isnil(L, -1)) {
+    const char *msg = lua_tostring(L, -1);
+    if (msg == NULL) msg = "(error object is not a string)";
+    l_message(progname, msg);
+    lua_pop(L, 1);
+  }
+  return status;
+}
+
+
+static int traceback (lua_State *L) {
+  lua_getfield(L, LUA_GLOBALSINDEX, "debug");
+  if (!lua_istable(L, -1)) {
+    lua_pop(L, 1);
+    return 1;
+  }
+  lua_getfield(L, -1, "traceback");
+  if (!lua_isfunction(L, -1)) {
+    lua_pop(L, 2);
+    return 1;
+  }
+  lua_pushvalue(L, 1);  /* pass error message */
+  lua_pushinteger(L, 2);  /* skip this function and traceback */
+  lua_call(L, 2, 1);  /* call debug.traceback */
+  return 1;
+}
+
+
+static int docall (lua_State *L, int narg, int clear) {
+  int status;
+  int base = lua_gettop(L) - narg;  /* function index */
+  lua_pushcfunction(L, traceback);  /* push traceback function */
+  lua_insert(L, base);  /* put it under chunk and args */
+  signal(SIGINT, laction);
+  status = lua_pcall(L, narg, (clear ? 0 : LUA_MULTRET), base);
+  signal(SIGINT, SIG_DFL);
+  lua_remove(L, base);  /* remove traceback function */
+  return status;
+}
+
+
+static void print_version (void) {
+  l_message(NULL, LUA_VERSION "  " LUA_COPYRIGHT);
+}
+
+
+static int getargs (lua_State *L, int argc, char **argv, int n) {
+  int narg = argc - (n + 1);  /* number of arguments to the script */
+  int i;
+  luaL_checkstack(L, narg + 3, "too many arguments to script");
+  for (i=n+1; i < argc; i++)
+    lua_pushstring(L, argv[i]);
+  lua_newtable(L);
+  for (i=0; i < argc; i++) {
+    lua_pushstring(L, argv[i]);
+    lua_rawseti(L, -2, i - n);
+  }
+  return narg;
+}
+
+
+static int dofile (lua_State *L, const char *name) {
+  int status = luaL_loadfile(L, name) || docall(L, 0, 1);
+  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) || docall(L, 0, 1);
+  return report(L, status);
+}
+
+
+static int dolibrary (lua_State *L, const char *name) {
+  lua_getglobal(L, "require");
+  lua_pushstring(L, name);
+  return report(L, lua_pcall(L, 1, 0, 0));
+}
+
+
+static const char *get_prompt (lua_State *L, int firstline) {
+  const char *p;
+  lua_getfield(L, LUA_GLOBALSINDEX, firstline ? "_PROMPT" : "_PROMPT2");
+  p = lua_tostring(L, -1);
+  if (p == NULL) p = (firstline ? LUA_PROMPT : LUA_PROMPT2);
+  lua_pop(L, 1);  /* remove global */
+  return p;
+}
+
+
+static int incomplete (lua_State *L, int status) {
+  if (status == LUA_ERRSYNTAX) {
+    size_t lmsg;
+    const char *msg = lua_tolstring(L, -1, &lmsg);
+    const char *tp = msg + lmsg - (sizeof(LUA_QL("<eof>")) - 1);
+    if (strstr(msg, LUA_QL("<eof>")) == tp) {
+      lua_pop(L, 1);
+      return 1;
+    }
+  }
+  return 0;  /* else... */
+}
+
+
+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);
+  if (lua_readline(L, b, prmt) == 0)
+    return 0;  /* no input */
+  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 `=' ? */
+    lua_pushfstring(L, "return %s", b+1);  /* change it to `return' */
+  else
+    lua_pushstring(L, b);
+  lua_freeline(L, b);
+  return 1;
+}
+
+
+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 */
+    status = luaL_loadbuffer(L, lua_tostring(L, 1), lua_strlen(L, 1), "=stdin");
+    if (!incomplete(L, status)) break;  /* cannot try to add lines? */
+    if (!pushline(L, 0))  /* no more input? */
+      return -1;
+    lua_pushliteral(L, "\n");  /* add a new line... */
+    lua_insert(L, -2);  /* ...between the two lines */
+    lua_concat(L, 3);  /* join them */
+  }
+  lua_saveline(L, 1);
+  lua_remove(L, 1);  /* remove line */
+  return status;
+}
+
+
+static void dotty (lua_State *L) {
+  int status;
+  const char *oldprogname = progname;
+  progname = NULL;
+  print_version();
+  while ((status = loadline(L)) != -1) {
+    if (status == 0) status = docall(L, 0, 0);
+    report(L, status);
+    if (status == 0 && lua_gettop(L) > 0) {  /* any result to print? */
+      lua_getglobal(L, "print");
+      lua_insert(L, 1);
+      if (lua_pcall(L, lua_gettop(L)-1, 0, 0) != 0)
+        l_message(progname, lua_pushfstring(L,
+                               "error calling " LUA_QL("print") " (%s)",
+                               lua_tostring(L, -1)));
+    }
+  }
+  lua_settop(L, 0);  /* clear stack */
+  fputs("\n", stdout);
+  fflush(stdout);
+  progname = oldprogname;
+}
+
+
+#define clearinteractive(i)	(*i &= 2)
+
+static int handle_argv (lua_State *L, int argc, char **argv, int *interactive) {
+  if (argv[1] == NULL) {  /* no arguments? */
+    *interactive = 0;
+    if (lua_stdin_is_tty())
+      dotty(L);
+    else
+      dofile(L, NULL);  /* executes stdin as a file */
+  }
+  else {  /* other arguments; loop over them */
+    int i;
+    for (i = 1; argv[i] != NULL; i++) {
+      if (argv[i][0] != '-') break;  /* not an option? */
+      switch (argv[i][1]) {  /* option */
+        case '-': {  /* `--' */
+          if (argv[i][2] != '\0') {
+            print_usage();
+            return 1;
+          }
+          i++;  /* skip this argument */
+          goto endloop;  /* stop handling arguments */
+        }
+        case '\0': {
+          clearinteractive(interactive);
+          dofile(L, NULL);  /* executes stdin as a file */
+          break;
+        }
+        case 'i': {
+          *interactive = 2;  /* force interactive mode after arguments */
+          break;
+        }
+        case 'v': {
+          clearinteractive(interactive);
+          print_version();
+          break;
+        }
+        case 'e': {
+          const char *chunk = argv[i] + 2;
+          clearinteractive(interactive);
+          if (*chunk == '\0') chunk = argv[++i];
+          if (chunk == NULL) {
+            print_usage();
+            return 1;
+          }
+          if (dostring(L, chunk, "=(command line)") != 0)
+            return 1;
+          break;
+        }
+        case 'l': {
+          const char *filename = argv[i] + 2;
+          if (*filename == '\0') filename = argv[++i];
+          if (filename == NULL) {
+            print_usage();
+            return 1;
+          }
+          if (dolibrary(L, filename))
+            return 1;  /* stop if file fails */
+          break;
+        }
+        default: {
+          clearinteractive(interactive);
+          print_usage();
+          return 1;
+        }
+      }
+    } endloop:
+    if (argv[i] != NULL) {
+      int status;
+      const char *filename = argv[i];
+      int narg = getargs(L, argc, argv, i);  /* collect arguments */
+      lua_setglobal(L, "arg");
+      clearinteractive(interactive);
+      status = luaL_loadfile(L, filename);
+      lua_insert(L, -(narg+1));
+      if (status == 0)
+        status = docall(L, narg, 0);
+      else
+        lua_pop(L, narg);      
+      return report(L, status);
+    }
+  }
+  return 0;
+}
+
+
+static int handle_luainit (lua_State *L) {
+  const char *init = getenv("LUA_INIT");
+  if (init == NULL) return 0;  /* status OK */
+  else if (init[0] == '@')
+    return dofile(L, init+1);
+  else
+    return dostring(L, init, "=LUA_INIT");
+}
+
+
+struct Smain {
+  int argc;
+  char **argv;
+  int status;
+};
+
+
+static int pmain (lua_State *L) {
+  struct Smain *s = (struct Smain *)lua_touserdata(L, 1);
+  int status;
+  int interactive = 1;
+  if (s->argv[0] && s->argv[0][0]) progname = s->argv[0];
+  globalL = L;
+  luaL_openlibs(L);  /* open libraries */
+  status = handle_luainit(L);
+  if (status == 0) {
+    status = handle_argv(L, s->argc, s->argv, &interactive);
+    if (status == 0 && interactive) dotty(L);
+  }
+  s->status = status;
+  return 0;
+}
+
+
+int main (int argc, char **argv) {
+  int status;
+  struct Smain s;
+  lua_State *L = lua_open();  /* create state */
+  if (L == NULL) {
+    l_message(argv[0], "cannot create state: not enough memory");
+    return EXIT_FAILURE;
+  }
+  s.argc = argc;
+  s.argv = argv;
+  status = lua_cpcall(L, &pmain, &s);
+  report(L, status);
+  lua_close(L);
+  return (status || s.status) ? EXIT_FAILURE : EXIT_SUCCESS;
+}
+

lua.h

@@ -1,54 +1,382 @@
 /*
-** LUA - Linguagem para Usuarios de Aplicacao
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: $
+** $Id: lua.h,v 1.211 2005/08/12 13:34:15 roberto Exp roberto $
+** Lua - An Extensible Extension Language
+** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
+** See Copyright Notice at the end of this file
 */
 
 
 #ifndef lua_h
 #define lua_h
 
-typedef void (*lua_CFunction) (void);
-typedef struct Object *lua_Object;
-
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+#include <stdarg.h>
+#include <stddef.h>
 
 
-void           lua_errorfunction    	(void (*fn) (char *s));
-void           lua_error		(char *s);
-int            lua_dofile 		(char *filename);
-int            lua_dostring 		(char *string);
-int            lua_call 		(char *functionname, int nparam);
+#include "luaconf.h"
 
-lua_Object     lua_getparam 		(int number);
-float          lua_getnumber 		(lua_Object object);
-char          *lua_getstring 		(lua_Object object);
-char 	      *lua_copystring 		(lua_Object object);
-lua_CFunction  lua_getcfunction 	(lua_Object object);
-void          *lua_getuserdata  	(lua_Object object);
-lua_Object     lua_getfield         	(lua_Object object, char *field);
-lua_Object     lua_getindexed         	(lua_Object object, float index);
-lua_Object     lua_getglobal 		(char *name);
 
-lua_Object     lua_pop 			(void);
+#define LUA_VERSION	"Lua 5.1"
+#define LUA_VERSION_NUM	501
+#define LUA_COPYRIGHT	"Copyright (C) 1994-2005 Lua.org, PUC-Rio"
+#define LUA_AUTHORS 	"R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
 
-int 	       lua_pushnil 		(void);
-int            lua_pushnumber 		(float n);
-int            lua_pushstring 		(char *s);
-int            lua_pushcfunction	(lua_CFunction fn);
-int            lua_pushuserdata     	(void *u);
-int            lua_pushobject       	(lua_Object object);
 
-int            lua_storeglobal		(char *name);
-int            lua_storefield		(lua_Object object, char *field);
-int            lua_storeindexed		(lua_Object object, float index);
+/* mark for precompiled code (`<esc>Lua') */
+#define	LUA_SIGNATURE	"\033Lua"
+
+/* option for multiple returns in `lua_pcall' and `lua_call' */
+#define LUA_MULTRET	(-1)
+
+
+/*
+** pseudo-indices
+*/
+#define LUA_REGISTRYINDEX	(-10000)
+#define LUA_ENVIRONINDEX	(-10001)
+#define LUA_GLOBALSINDEX	(-10002)
+#define lua_upvalueindex(i)	(LUA_GLOBALSINDEX-(i))
+
+
+/* thread status; 0 is OK */
+#define LUA_YIELD	1
+#define LUA_ERRRUN	2
+#define LUA_ERRSYNTAX	3
+#define LUA_ERRMEM	4
+#define LUA_ERRERR	5
+
+
+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
+*/
+#define LUA_TNONE		(-1)
+
+#define LUA_TNIL		0
+#define LUA_TBOOLEAN		1
+#define LUA_TLIGHTUSERDATA	2
+#define LUA_TNUMBER		3
+#define LUA_TSTRING		4
+#define LUA_TTABLE		5
+#define LUA_TFUNCTION		6
+#define LUA_TUSERDATA		7
+#define LUA_TTHREAD		8
+
+
+
+/* minimum Lua stack available to a C function */
+#define LUA_MINSTACK	20
+
+
+/*
+** generic extra include file
+*/
+#if defined(LUA_USER_H)
+#include LUA_USER_H
+#endif
+
+
+/* type of numbers in Lua */
+typedef LUA_NUMBER lua_Number;
+
+
+/* type for integer functions */
+typedef LUA_INTEGER lua_Integer;
+
+
+
+/*
+** state manipulation
+*/
+LUA_API lua_State *(lua_newstate) (lua_Alloc f, void *ud);
+LUA_API void       (lua_close) (lua_State *L);
+LUA_API lua_State *(lua_newthread) (lua_State *L);
+
+LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
+
+
+/*
+** basic stack manipulation
+*/
+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_insert) (lua_State *L, int idx);
+LUA_API void  (lua_replace) (lua_State *L, int idx);
+LUA_API int   (lua_checkstack) (lua_State *L, int sz);
+
+LUA_API void  (lua_xmove) (lua_State *from, lua_State *to, int n);
+
+
+/*
+** access functions (stack -> C)
+*/
+
+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_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 int            (lua_equal) (lua_State *L, int idx1, int idx2);
+LUA_API int            (lua_rawequal) (lua_State *L, int idx1, int idx2);
+LUA_API int            (lua_lessthan) (lua_State *L, int idx1, int idx2);
+
+LUA_API lua_Number      (lua_tonumber) (lua_State *L, int idx);
+LUA_API lua_Integer     (lua_tointeger) (lua_State *L, int idx);
+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_objlen) (lua_State *L, int idx);
+LUA_API lua_CFunction   (lua_tocfunction) (lua_State *L, int idx);
+LUA_API void	       *(lua_touserdata) (lua_State *L, int idx);
+LUA_API lua_State      *(lua_tothread) (lua_State *L, int idx);
+LUA_API const void     *(lua_topointer) (lua_State *L, int idx);
+
+
+/*
+** push functions (C -> stack)
+*/
+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_pushlstring) (lua_State *L, const char *s, size_t l);
+LUA_API void  (lua_pushstring) (lua_State *L, const char *s);
+LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
+                                                      va_list argp);
+LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
+LUA_API void  (lua_pushcclosure) (lua_State *L, lua_CFunction fn, int n);
+LUA_API void  (lua_pushboolean) (lua_State *L, int b);
+LUA_API void  (lua_pushlightuserdata) (lua_State *L, void *p);
+LUA_API int   (lua_pushthread) (lua_State *L);
+
+
+/*
+** get functions (Lua -> stack)
+*/
+LUA_API void  (lua_gettable) (lua_State *L, int idx);
+LUA_API void  (lua_getfield) (lua_State *L, int idx, const char *k);
+LUA_API void  (lua_rawget) (lua_State *L, int idx);
+LUA_API void  (lua_rawgeti) (lua_State *L, int idx, int n);
+LUA_API void  (lua_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_getfenv) (lua_State *L, int idx);
+
+
+/*
+** set functions (stack -> Lua)
+*/
+LUA_API void  (lua_settable) (lua_State *L, int idx);
+LUA_API void  (lua_setfield) (lua_State *L, int idx, const char *k);
+LUA_API void  (lua_rawset) (lua_State *L, int idx);
+LUA_API void  (lua_rawseti) (lua_State *L, int idx, int n);
+LUA_API int   (lua_setmetatable) (lua_State *L, int objindex);
+LUA_API int   (lua_setfenv) (lua_State *L, int idx);
+
+
+/*
+** `load' and `call' functions (load and run Lua code)
+*/
+LUA_API void  (lua_call) (lua_State *L, int nargs, int nresults);
+LUA_API int   (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc);
+LUA_API int   (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud);
+LUA_API int   (lua_load) (lua_State *L, lua_Reader reader, void *dt,
+                                        const char *chunkname);
+
+LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
+
+
+/*
+** coroutine functions
+*/
+LUA_API int  (lua_yield) (lua_State *L, int nresults);
+LUA_API int  (lua_resume) (lua_State *L, int narg);
+LUA_API int  (lua_status) (lua_State *L);
+
+/*
+** garbage-collection function and options
+*/
+
+#define LUA_GCSTOP		0
+#define LUA_GCRESTART		1
+#define LUA_GCCOLLECT		2
+#define LUA_GCCOUNT		3
+#define LUA_GCSTEP		4
+#define LUA_GCSETPAUSE		5
+#define LUA_GCSETSTEPMUL	6
+
+LUA_API int (lua_gc) (lua_State *L, int what, int data);
+
+
+/*
+** miscellaneous functions
+*/
+
+LUA_API int   (lua_error) (lua_State *L);
+
+LUA_API int   (lua_next) (lua_State *L, int idx);
+
+LUA_API void  (lua_concat) (lua_State *L, int n);
+
+LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
+
+
+
+/* 
+** ===============================================================
+** some useful macros
+** ===============================================================
+*/
+
+#define lua_pop(L,n)		lua_settop(L, -(n)-1)
+
+#define lua_newtable(L)		lua_createtable(L, 0, 0)
+
+#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))
+
+#define lua_pushcfunction(L,f)	lua_pushcclosure(L, (f), 0)
+
+#define lua_strlen(L,i)		lua_objlen(L, (i))
+
+#define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)
+#define lua_istable(L,n)	(lua_type(L, (n)) == LUA_TTABLE)
+#define lua_islightuserdata(L,n)	(lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
+#define lua_isnil(L,n)		(lua_type(L, (n)) == LUA_TNIL)
+#define lua_isboolean(L,n)	(lua_type(L, (n)) == LUA_TBOOLEAN)
+#define lua_isthread(L,n)	(lua_type(L, (n)) == LUA_TTHREAD)
+#define lua_isnone(L,n)		(lua_type(L, (n)) == LUA_TNONE)
+#define lua_isnoneornil(L, n)	(lua_type(L, (n)) <= 0)
+
+#define lua_pushliteral(L, s)	\
+	lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
+
+#define lua_setglobal(L,s)	lua_setfield(L, LUA_GLOBALSINDEX, (s))
+#define lua_getglobal(L,s)	lua_getfield(L, LUA_GLOBALSINDEX, (s))
+
+#define lua_tostring(L,i)	lua_tolstring(L, (i), NULL)
+
+
+
+/*
+** compatibility macros and functions
+*/
+
+#define lua_open()	luaL_newstate()
+
+#define lua_getregistry(L)	lua_pushvalue(L, LUA_REGISTRYINDEX)
+
+#define lua_getgccount(L)	lua_gc(L, LUA_GCCOUNT, 0)
+
+#define lua_Chunkreader		lua_Reader
+#define lua_Chunkwriter		lua_Writer
+
+
+
+/*
+** {======================================================================
+** Debug API
+** =======================================================================
+*/
+
+
+/*
+** Event codes
+*/
+#define LUA_HOOKCALL	0
+#define LUA_HOOKRET	1
+#define LUA_HOOKLINE	2
+#define LUA_HOOKCOUNT	3
+#define LUA_HOOKTAILRET 4
+
+
+/*
+** Event masks
+*/
+#define LUA_MASKCALL	(1 << LUA_HOOKCALL)
+#define LUA_MASKRET	(1 << LUA_HOOKRET)
+#define LUA_MASKLINE	(1 << LUA_HOOKLINE)
+#define LUA_MASKCOUNT	(1 << LUA_HOOKCOUNT)
+
+typedef struct lua_Debug lua_Debug;  /* activation record */
+
+
+/* Functions to be called by the debuger in specific events */
+typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
+
+
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar);
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n);
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n);
+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);
+
+LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count);
+LUA_API lua_Hook lua_gethook (lua_State *L);
+LUA_API int lua_gethookmask (lua_State *L);
+LUA_API int lua_gethookcount (lua_State *L);
+
+
+struct lua_Debug {
+  int event;
+  const char *name;	/* (n) */
+  const char *namewhat;	/* (n) `global', `local', `field', `method' */
+  const char *what;	/* (S) `Lua', `C', `main', `tail' */
+  const char *source;	/* (S) */
+  int currentline;	/* (l) */
+  int nups;		/* (u) number of upvalues */
+  int linedefined;	/* (S) */
+  int lastlinedefined;	/* (S) */
+  char short_src[LUA_IDSIZE]; /* (S) */
+  /* private part */
+  int i_ci;  /* active function */
+};
+
+/* }====================================================================== */
+
+
+/******************************************************************************
+* Copyright (C) 1994-2005 Lua.org, PUC-Rio.  All rights reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be
+* included in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+******************************************************************************/
 
-int            lua_isnil 		(lua_Object object);
-int            lua_isnumber 		(lua_Object object);
-int            lua_isstring 		(lua_Object object);
-int            lua_istable          	(lua_Object object);
-int            lua_iscfunction 		(lua_Object object);
-int            lua_isuserdata 		(lua_Object object);
 
 #endif

lua.lex

@@ -1,85 +0,0 @@
-%{
-
-char *rcs_lualex = "$Id: $";
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y.tab.h"
-
-#undef input
-#undef unput
-
-static Input input;
-static Unput unput;
-
-void lua_setinput (Input fn)
-{
- input = fn;
-}
-
-void lua_setunput (Unput fn)
-{
- unput = fn;
-}
-
-char *lua_lasttext (void)
-{
- return yytext;
-}
-
-%}
-
-
-%%
-[ \t]*					;
-^"$debug"				{yylval.vInt = 1; return DEBUG;}
-^"$nodebug"				{yylval.vInt = 0; return DEBUG;}
-\n					lua_linenumber++;
-"--".*					;
-"local"					return LOCAL;
-"if"					return IF;
-"then"					return THEN;
-"else"					return ELSE;
-"elseif"				return ELSEIF;
-"while"					return WHILE;
-"do"					return DO;
-"repeat"				return REPEAT;
-"until"					return UNTIL;
-"function"				{
-                                         yylval.vWord = lua_nfile-1;
-                                         return FUNCTION;
-					}
-"end"					return END;
-"return" 				return RETURN;
-"local" 				return LOCAL;
-"nil"					return NIL;
-"and"					return AND;
-"or"					return OR;
-"not"					return NOT;
-"~="					return NE;
-"<="					return LE;
-">="					return GE;
-".."					return CONC;
-\"[^\"]*\" 			| 
-\'[^\']*\'			      {
-				       yylval.vWord = lua_findenclosedconstant (yytext);
-				       return STRING;
-				      }
-[0-9]+("."[0-9]*)?	|
-([0-9]+)?"."[0-9]+	|
-[0-9]+("."[0-9]*)?[dDeEgG][+-]?[0-9]+ |
-([0-9]+)?"."[0-9]+[dDeEgG][+-]?[0-9]+ {
-				        yylval.vFloat = atof(yytext);
-				        return NUMBER;
-				       }
-[a-zA-Z_][a-zA-Z0-9_]*  	       {
-					yylval.vWord = lua_findsymbol (yytext);
-					return NAME;
-				       }
-.					return  *yytext;
-

lua.stx

@@ -1,954 +0,0 @@
-%{
-
-char *rcs_luastx = "$Id: lua.stx,v 2.4 1994/04/20 16:22:21 celes Exp celes $";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "mm.h"
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "lua.h"
-
-#define LISTING 0
-
-#ifndef CODE_BLOCK
-#define CODE_BLOCK 256
-#endif
-static Long   maxcode;
-static Long   maxmain;
-static Long   maxcurr ;
-static Byte  *code = NULL;
-static Byte  *initcode;
-static Byte  *basepc;
-static Long   maincode;
-static Long   pc;
-
-#define MAXVAR 32
-static long    varbuffer[MAXVAR];    /* variables in an assignment list;
-				it's long to store negative Word values */
-static int     nvarbuffer=0;	     /* number of variables at a list */
-
-static Word    localvar[STACKGAP];   /* store local variable names */
-static int     nlocalvar=0;	     /* number of local variables */
-
-#define MAXFIELDS FIELDS_PER_FLUSH*2
-static Word    fields[MAXFIELDS];     /* fieldnames to be flushed */
-static int     nfields=0;
-static int     ntemp;		     /* number of temporary var into stack */
-static int     err;		     /* flag to indicate error */
-
-/* Internal functions */
-
-static void code_byte (Byte c)
-{
- if (pc>maxcurr-2)  /* 1 byte free to code HALT of main code */
- {
-  maxcurr *= 2;
-  basepc = (Byte *)realloc(basepc, maxcurr*sizeof(Byte));
-  if (basepc == NULL)
-  {
-   lua_error ("not enough memory");
-   err = 1;
-  }
- }
- basepc[pc++] = c;
-}
-
-static void code_word (Word n)
-{
- CodeWord code;
- code.w = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
-}
-
-static void code_float (float n)
-{
- CodeFloat code;
- code.f = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
- code_byte(code.m.c3);
- code_byte(code.m.c4);
-}
-
-static void code_word_at (Byte *p, Word n)
-{
- CodeWord code;
- code.w = n;
- *p++ = code.m.c1;
- *p++ = code.m.c2;
-}
-
-static void push_field (Word name)
-{
-  if (nfields < STACKGAP-1)
-    fields[nfields++] = name;
-  else
-  {
-   lua_error ("too many fields in a constructor");
-   err = 1;
-  }
-}
-
-static void flush_record (int n)
-{
-  int i;
-  if (n == 0) return;
-  code_byte(STORERECORD);
-  code_byte(n);
-  for (i=0; i<n; i++)
-    code_word(fields[--nfields]);
-  ntemp -= n;
-}
-
-static void flush_list (int m, int n)
-{
-  if (n == 0) return;
-  if (m == 0)
-    code_byte(STORELIST0); 
-  else
-  {
-    code_byte(STORELIST);
-    code_byte(m);
-  }
-  code_byte(n);
-  ntemp-=n;
-}
-
-static void incr_ntemp (void)
-{
- if (ntemp+nlocalvar+MAXVAR+1 < STACKGAP)
-  ntemp++;
- else
- {
-  lua_error ("stack overflow");
-  err = 1;
- }
-}
-
-static void add_nlocalvar (int n)
-{
- if (ntemp+nlocalvar+MAXVAR+n < STACKGAP)
-  nlocalvar += n;
- else
- {
-  lua_error ("too many local variables or expression too complicate");
-  err = 1;
- }
-}
-
-static void incr_nvarbuffer (void)
-{
- if (nvarbuffer < MAXVAR-1)
-  nvarbuffer++;
- else
- {
-  lua_error ("variable buffer overflow");
-  err = 1;
- }
-}
-
-static void code_number (float f)
-{ 
-  Word i = (Word)f;
-  if (f == (float)i)  /* f has an (short) integer value */
-  {
-   if (i <= 2) code_byte(PUSH0 + i);
-   else if (i <= 255)
-   {
-    code_byte(PUSHBYTE);
-    code_byte(i);
-   }
-   else
-   {
-    code_byte(PUSHWORD);
-    code_word(i);
-   }
-  }
-  else
-  {
-   code_byte(PUSHFLOAT);
-   code_float(f);
-  }
-  incr_ntemp();
-}
-
-%}
-
-
-%union 
-{
- int   vInt;
- float vFloat;
- char *pChar;
- Word  vWord;
- Long  vLong;
- Byte *pByte;
-}
-
-%start functionlist
-
-%token WRONGTOKEN
-%token NIL
-%token IF THEN ELSE ELSEIF WHILE DO REPEAT UNTIL END
-%token RETURN
-%token LOCAL
-%token <vFloat> NUMBER
-%token <vWord>  FUNCTION STRING
-%token <pChar>   NAME 
-%token <vInt>   DEBUG
-
-%type <vLong> PrepJump
-%type <vInt>  expr, exprlist, exprlist1, varlist1, typeconstructor
-%type <vInt>  fieldlist, localdeclist
-%type <vInt>  ffieldlist, ffieldlist1
-%type <vInt>  lfieldlist, lfieldlist1
-%type <vLong> var, objectname
-
-
-%left AND OR
-%left '=' NE '>' '<' LE GE
-%left CONC
-%left '+' '-'
-%left '*' '/'
-%left UNARY NOT
-
-
-%% /* beginning of rules section */
-
-
-functionlist : /* empty */
-	     | functionlist 
-	        {
-	  	  pc=maincode; basepc=initcode; maxcurr=maxmain;
-		  nlocalvar=0;
-	        }
-	       stat sc 
-		{
-		  maincode=pc; initcode=basepc; maxmain=maxcurr;
-		}
-	     | functionlist function
-	     | functionlist setdebug
-	     ;
-	     
-function     : FUNCTION NAME 
-	       {
-		if (code == NULL)	/* first function */
-		{
-		 code = (Byte *) calloc(CODE_BLOCK, sizeof(Byte));
-		 if (code == NULL)
-		 {
-		  lua_error("not enough memory");
-		  err = 1;
-		 }
-		 maxcode = CODE_BLOCK;
-		}
-		pc=0; basepc=code; maxcurr=maxcode; 
-		nlocalvar=0;
-		$<vWord>$ = lua_findsymbol($2); 
-	       }
-	       '(' parlist ')' 
-	       {
-	        if (lua_debug)
-		{
-	         code_byte(SETFUNCTION); 
-                 code_word(lua_nfile-1);
-		 code_word($<vWord>3);
-		}
-	        lua_codeadjust (0);
-	       }
-               block
-               END 	 
-	       { 
-                if (lua_debug) code_byte(RESET); 
-	        code_byte(RETCODE); code_byte(nlocalvar);
-	        s_tag($<vWord>3) = T_FUNCTION;
-	        s_bvalue($<vWord>3) = calloc (pc, sizeof(Byte));
-		if (s_bvalue($<vWord>3) == NULL)
-		{
-		 lua_error("not enough memory");
-		 err = 1;
-		}
-	        memcpy (s_bvalue($<vWord>3), basepc, pc*sizeof(Byte));
-		code = basepc; maxcode=maxcurr;
-#if LISTING
-PrintCode(code,code+pc);
-#endif
-	       }
-	       ;
-
-statlist : /* empty */
-	 | statlist stat sc
-	 ;
-
-stat	 : {
-            ntemp = 0; 
-            if (lua_debug)
-            {
-             code_byte(SETLINE); code_word(lua_linenumber);
-            }
-	   }
-	   stat1
-		
-sc	 : /* empty */ | ';' ;
-
-
-stat1  : IF expr1 THEN PrepJump block PrepJump elsepart END
-       {
-        {
-	 Long elseinit = $6+sizeof(Word)+1;
-	 if (pc - elseinit == 0)		/* no else */
-	 {
-	  pc -= sizeof(Word)+1;
-	  elseinit = pc;
-	 }
-	 else
-	 {
-	  basepc[$6] = JMP;
-	  code_word_at(basepc+$6+1, pc - elseinit);
-	 }
-	 basepc[$4] = IFFJMP;
-	 code_word_at(basepc+$4+1,elseinit-($4+sizeof(Word)+1));
-	}
-       }
-     
-       | WHILE {$<vLong>$=pc;} expr1 DO PrepJump block PrepJump END
-     	
-       {
-        basepc[$5] = IFFJMP;
-	code_word_at(basepc+$5+1, pc - ($5 + sizeof(Word)+1));
-        
-        basepc[$7] = UPJMP;
-	code_word_at(basepc+$7+1, pc - ($<vLong>2));
-       }
-     
-       | REPEAT {$<vLong>$=pc;} block UNTIL expr1 PrepJump
-     	
-       {
-        basepc[$6] = IFFUPJMP;
-	code_word_at(basepc+$6+1, pc - ($<vLong>2));
-       }
-
-
-       | varlist1 '=' exprlist1
-       {
-        {
-         int i;
-         if ($3 == 0 || nvarbuffer != ntemp - $1 * 2)
-	  lua_codeadjust ($1 * 2 + nvarbuffer);
-	 for (i=nvarbuffer-1; i>=0; i--)
-	  lua_codestore (i);
-	 if ($1 > 1 || ($1 == 1 && varbuffer[0] != 0))
-	  lua_codeadjust (0);
-	}
-       } 
-       | functioncall			{ lua_codeadjust (0); }
-       | typeconstructor                { lua_codeadjust (0); }
-       | LOCAL localdeclist decinit   { add_nlocalvar($2); lua_codeadjust (0); }
-       ;
-
-elsepart : /* empty */
-	 | ELSE block
-         | ELSEIF expr1 THEN PrepJump block PrepJump elsepart
-         {
-          {
-  	   Long elseinit = $6+sizeof(Word)+1;
-  	   if (pc - elseinit == 0)		/* no else */
-  	   {
-  	    pc -= sizeof(Word)+1;
-	    elseinit = pc;
-	   }
-	   else
-	   {
-	    basepc[$6] = JMP;
-	    code_word_at(basepc+$6+1, pc - elseinit);
-	   }
-	   basepc[$4] = IFFJMP;
-	   code_word_at(basepc+$4+1, elseinit - ($4 + sizeof(Word)+1));
-	  }  
-         }   
-         ;
-     
-block    : {$<vInt>$ = nlocalvar;} statlist {ntemp = 0;} ret 
-         {
-	  if (nlocalvar != $<vInt>1)
-	  {
-           nlocalvar = $<vInt>1;
-	   lua_codeadjust (0);
-	  }
-         }
-         ;
-
-ret	: /* empty */
-        | { if (lua_debug){code_byte(SETLINE);code_word(lua_linenumber);}}
-          RETURN  exprlist sc 	
-          { 
-           if (lua_debug) code_byte(RESET); 
-           code_byte(RETCODE); code_byte(nlocalvar);
-          }
-	;
-
-PrepJump : /* empty */
-	 { 
-	  $$ = pc;
-	  code_byte(0);		/* open space */
-	  code_word (0);
-         }
-	   
-expr1	 : expr { if ($1 == 0) {lua_codeadjust (ntemp+1); incr_ntemp();}}
-	 ;
-				
-expr :	'(' expr ')'    { $$ = $2; }
-     |	expr1 '=' expr1	{ code_byte(EQOP);   $$ = 1; ntemp--;}
-     |	expr1 '<' expr1	{ code_byte(LTOP);   $$ = 1; ntemp--;}
-     |	expr1 '>' expr1	{ code_byte(LEOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 NE  expr1	{ code_byte(EQOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 LE  expr1	{ code_byte(LEOP);   $$ = 1; ntemp--;}
-     |	expr1 GE  expr1	{ code_byte(LTOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 '+' expr1 { code_byte(ADDOP);  $$ = 1; ntemp--;}
-     |	expr1 '-' expr1 { code_byte(SUBOP);  $$ = 1; ntemp--;}
-     |	expr1 '*' expr1 { code_byte(MULTOP); $$ = 1; ntemp--;}
-     |	expr1 '/' expr1 { code_byte(DIVOP);  $$ = 1; ntemp--;}
-     |	expr1 CONC expr1 { code_byte(CONCOP);  $$ = 1; ntemp--;}
-     |	'+' expr1 %prec UNARY	{ $$ = 1; }
-     |	'-' expr1 %prec UNARY	{ code_byte(MINUSOP); $$ = 1;}
-     | typeconstructor { $$ = $1; }
-     |  '@' '(' dimension ')'
-     { 
-      code_byte(CREATEARRAY);
-      $$ = 1;
-     }
-     |	var             { lua_pushvar ($1); $$ = 1;}
-     |	NUMBER          { code_number($1); $$ = 1; }
-     |	STRING
-     {
-      code_byte(PUSHSTRING);
-      code_word($1);
-      $$ = 1;
-      incr_ntemp();
-     }
-     |	NIL		{code_byte(PUSHNIL); $$ = 1; incr_ntemp();}
-     |	functioncall
-     {
-      $$ = 0;
-      if (lua_debug)
-      {
-       code_byte(SETLINE); code_word(lua_linenumber);
-      }
-     }
-     |	NOT expr1	{ code_byte(NOTOP);  $$ = 1;}
-     |	expr1 AND PrepJump {code_byte(POP); ntemp--;} expr1
-     { 
-      basepc[$3] = ONFJMP;
-      code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
-      $$ = 1;
-     }
-     |	expr1 OR PrepJump {code_byte(POP); ntemp--;} expr1	
-     { 
-      basepc[$3] = ONTJMP;
-      code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
-      $$ = 1;
-     }
-     ;
-
-typeconstructor: '@'  
-     {
-      code_byte(PUSHBYTE);
-      $<vLong>$ = pc; code_byte(0);
-      incr_ntemp();
-      code_byte(CREATEARRAY);
-     }
-      objectname fieldlist 
-     {
-      basepc[$<vLong>2] = $4; 
-      if ($3 < 0)	/* there is no function to be called */
-      {
-       $$ = 1;
-      }
-      else
-      {
-       lua_pushvar ($3+1);
-       code_byte(PUSHMARK);
-       incr_ntemp();
-       code_byte(PUSHOBJECT);
-       incr_ntemp();
-       code_byte(CALLFUNC); 
-       ntemp -= 4;
-       $$ = 0;
-       if (lua_debug)
-       {
-        code_byte(SETLINE); code_word(lua_linenumber);
-       }
-      }
-     }
-         ;
-
-dimension    : /* empty */	{ code_byte(PUSHNIL); incr_ntemp();}
-	     | expr1
-	     ;
-	     
-functioncall : functionvalue  {code_byte(PUSHMARK); $<vInt>$ = ntemp; incr_ntemp();}
-                '(' exprlist ')' { code_byte(CALLFUNC); ntemp = $<vInt>2-1;}
-
-functionvalue : var {lua_pushvar ($1); } 
-	      ;
-		
-exprlist  :	/* empty */		{ $$ = 1; }
-	  |	exprlist1		{ $$ = $1; }
-	  ;
-		
-exprlist1 :	expr			{ $$ = $1; }
-	  |	exprlist1 ',' {if (!$1){lua_codeadjust (ntemp+1); incr_ntemp();}} 
-                 expr {$$ = $4;}
-	  ;
-
-parlist  :	/* empty */
-	  |	parlist1
-	  ;
-		
-parlist1 :	NAME		  
-		{
-		 localvar[nlocalvar]=lua_findsymbol($1); 
-		 add_nlocalvar(1);
-		}
-	  |	parlist1 ',' NAME 
-		{
-		 localvar[nlocalvar]=lua_findsymbol($3); 
-		 add_nlocalvar(1);
-		}
-	  ;
-		
-objectname :	/* empty */ 	{$$=-1;}
-	   |	NAME		{$$=lua_findsymbol($1);}
-	   ;
-	   
-fieldlist  : '{' ffieldlist '}'  
-	      { 
-	       flush_record($2%FIELDS_PER_FLUSH); 
-	       $$ = $2;
-	      }
-           | '[' lfieldlist ']'  
-	      { 
-	       flush_list($2/FIELDS_PER_FLUSH, $2%FIELDS_PER_FLUSH);
-	       $$ = $2;
-     	      }
-	   ;
-
-ffieldlist : /* empty */   { $$ = 0; }
-           | ffieldlist1   { $$ = $1; }
-           ;
-
-ffieldlist1 : ffield			{$$=1;}
-	   | ffieldlist1 ',' ffield	
-		{
-		  $$=$1+1;
-		  if ($$%FIELDS_PER_FLUSH == 0) flush_record(FIELDS_PER_FLUSH);
-		}
-	   ; 
-
-ffield      : NAME {$<vWord>$ = lua_findconstant($1);} '=' expr1 
-	      { 
-	       push_field($<vWord>2);
-	      }
-           ;
-
-lfieldlist : /* empty */   { $$ = 0; }
-           | lfieldlist1   { $$ = $1; }
-           ;
-
-lfieldlist1 : expr1  {$$=1;}
-	    | lfieldlist1 ',' expr1
-		{
-		  $$=$1+1;
-		  if ($$%FIELDS_PER_FLUSH == 0) 
-		    flush_list($$/FIELDS_PER_FLUSH - 1, FIELDS_PER_FLUSH);
-		}
-            ;
-
-varlist1  :	var			
-	  {
-	   nvarbuffer = 0; 
-           varbuffer[nvarbuffer] = $1; incr_nvarbuffer();
-	   $$ = ($1 == 0) ? 1 : 0;
-	  }
-	  |	varlist1 ',' var	
-	  { 
-           varbuffer[nvarbuffer] = $3; incr_nvarbuffer();
-	   $$ = ($3 == 0) ? $1 + 1 : $1;
-	  }
-	  ;
-		
-var	  :	NAME
-	  {
-	   Word s = lua_findsymbol($1);
-	   int local = lua_localname (s);
-	   if (local == -1)	/* global var */
-	    $$ = s + 1;		/* return positive value */
-           else
-	    $$ = -(local+1);		/* return negative value */
-	  }
-	  
-	  |	var {lua_pushvar ($1);} '[' expr1 ']' 
-	  {
-	   $$ = 0;		/* indexed variable */
-	  }
-	  |	var {lua_pushvar ($1);} '.' NAME
-	  {
-	   code_byte(PUSHSTRING);
-	   code_word(lua_findconstant($4)); incr_ntemp();
-	   $$ = 0;		/* indexed variable */
-	  }
-	  ;
-		
-localdeclist  : NAME {localvar[nlocalvar]=lua_findsymbol($1); $$ = 1;}
-     	  | localdeclist ',' NAME 
-	    {
-	     localvar[nlocalvar+$1]=lua_findsymbol($3); 
-	     $$ = $1+1;
-	    }
-	  ;
-		
-decinit	  : /* empty */
-	  | '=' exprlist1
-	  ;
-	  
-setdebug  : DEBUG {lua_debug = $1;}
-
-%%
-
-/*
-** Search a local name and if find return its index. If do not find return -1
-*/
-static int lua_localname (Word n)
-{
- int i;
- for (i=nlocalvar-1; i >= 0; i--)
-  if (n == localvar[i]) return i;	/* local var */
- return -1;		        /* global var */
-}
-
-/*
-** Push a variable given a number. If number is positive, push global variable
-** indexed by (number -1). If negative, push local indexed by ABS(number)-1.
-** Otherwise, if zero, push indexed variable (record).
-*/
-static void lua_pushvar (long number)
-{ 
- if (number > 0)	/* global var */
- {
-  code_byte(PUSHGLOBAL);
-  code_word(number-1);
-  incr_ntemp();
- }
- else if (number < 0)	/* local var */
- {
-  number = (-number) - 1;
-  if (number < 10) code_byte(PUSHLOCAL0 + number);
-  else
-  {
-   code_byte(PUSHLOCAL);
-   code_byte(number);
-  }
-  incr_ntemp();
- }
- else
- {
-  code_byte(PUSHINDEXED);
-  ntemp--;
- }
-}
-
-static void lua_codeadjust (int n)
-{
- code_byte(ADJUST);
- code_byte(n + nlocalvar);
-}
-
-static void lua_codestore (int i)
-{
- if (varbuffer[i] > 0)		/* global var */
- {
-  code_byte(STOREGLOBAL);
-  code_word(varbuffer[i]-1);
- }
- else if (varbuffer[i] < 0)      /* local var */
- {
-  int number = (-varbuffer[i]) - 1;
-  if (number < 10) code_byte(STORELOCAL0 + number);
-  else
-  {
-   code_byte(STORELOCAL);
-   code_byte(number);
-  }
- }
- else				  /* indexed var */
- {
-  int j;
-  int upper=0;     	/* number of indexed variables upper */
-  int param;		/* number of itens until indexed expression */
-  for (j=i+1; j <nvarbuffer; j++)
-   if (varbuffer[j] == 0) upper++;
-  param = upper*2 + i;
-  if (param == 0)
-   code_byte(STOREINDEXED0);
-  else
-  {
-   code_byte(STOREINDEXED);
-   code_byte(param);
-  }
- }
-}
-
-void yyerror (char *s)
-{
- static char msg[256];
- sprintf (msg,"%s near \"%s\" at line %d in file \"%s\"",
-          s, lua_lasttext (), lua_linenumber, lua_filename());
- lua_error (msg);
- err = 1;
-}
-
-int yywrap (void)
-{
- return 1;
-}
-
-
-/*
-** Parse LUA code and execute global statement.
-** Return 0 on success or 1 on error.
-*/
-int lua_parse (void)
-{
- Byte *init = initcode = (Byte *) calloc(CODE_BLOCK, sizeof(Byte));
- maincode = 0; 
- maxmain = CODE_BLOCK;
- if (init == NULL)
- {
-  lua_error("not enough memory");
-  return 1;
- }
- err = 0;
- if (yyparse () || (err==1)) return 1;
- initcode[maincode++] = HALT;
- init = initcode;
-#if LISTING
- PrintCode(init,init+maincode);
-#endif
- if (lua_execute (init)) return 1;
- free(init);
- return 0;
-}
-
-
-#if LISTING
-
-static void PrintCode (Byte *code, Byte *end)
-{
- Byte *p = code;
- printf ("\n\nCODE\n");
- while (p != end)
- {
-  switch ((OpCode)*p)
-  {
-   case PUSHNIL:	printf ("%d    PUSHNIL\n", (p++)-code); break;
-   case PUSH0: case PUSH1: case PUSH2:
-    			printf ("%d    PUSH%c\n", p-code, *p-PUSH0+'0');
-    			p++;
-   			break;
-   case PUSHBYTE:
-    			printf ("%d    PUSHBYTE   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case PUSHWORD:
-                        {
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHWORD   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHFLOAT:
-			{
-			 CodeFloat c;
-			 int n = p-code;
-			 p++;
-			 get_float(c,p);
-    			 printf ("%d    PUSHFLOAT  %f\n", n, c.f);
-			}
-   			break;
-   case PUSHSTRING:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHSTRING   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
-   case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
-   case PUSHLOCAL8: case PUSHLOCAL9:
-    			printf ("%d    PUSHLOCAL%c\n", p-code, *p-PUSHLOCAL0+'0');
-    			p++;
-   			break;
-   case PUSHLOCAL:	printf ("%d    PUSHLOCAL   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case PUSHGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHINDEXED:    printf ("%d    PUSHINDEXED\n", (p++)-code); break;
-   case PUSHMARK:       printf ("%d    PUSHMARK\n", (p++)-code); break;
-   case PUSHOBJECT:     printf ("%d    PUSHOBJECT\n", (p++)-code); break;
-   case STORELOCAL0: case STORELOCAL1: case STORELOCAL2: case STORELOCAL3:
-   case STORELOCAL4: case STORELOCAL5: case STORELOCAL6: case STORELOCAL7:
-   case STORELOCAL8: case STORELOCAL9:
-    			printf ("%d    STORELOCAL%c\n", p-code, *p-STORELOCAL0+'0');
-    			p++;
-   			break;
-   case STORELOCAL:
-    			printf ("%d    STORELOCAL   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case STOREGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    STOREGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case STOREINDEXED0:  printf ("%d    STOREINDEXED0\n", (p++)-code); break;
-   case STOREINDEXED:   printf ("%d    STOREINDEXED   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case STORELIST0:
-	printf("%d      STORELIST0  %d\n", p-code, *(++p));
-        p++;
-        break;
-   case STORELIST:
-	printf("%d      STORELIST  %d %d\n", p-code, *(p+1), *(p+2));
-        p+=3;
-        break;
-   case STORERECORD:
-       printf("%d      STORERECORD  %d\n", p-code, *(++p));
-       p += *p*sizeof(Word) + 1;
-       break;
-   case ADJUST:
-    			printf ("%d    ADJUST   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case CREATEARRAY:	printf ("%d    CREATEARRAY\n", (p++)-code); break;
-   case EQOP:       	printf ("%d    EQOP\n", (p++)-code); break;
-   case LTOP:       	printf ("%d    LTOP\n", (p++)-code); break;
-   case LEOP:       	printf ("%d    LEOP\n", (p++)-code); break;
-   case ADDOP:       	printf ("%d    ADDOP\n", (p++)-code); break;
-   case SUBOP:       	printf ("%d    SUBOP\n", (p++)-code); break;
-   case MULTOP:      	printf ("%d    MULTOP\n", (p++)-code); break;
-   case DIVOP:       	printf ("%d    DIVOP\n", (p++)-code); break;
-   case CONCOP:       	printf ("%d    CONCOP\n", (p++)-code); break;
-   case MINUSOP:       	printf ("%d    MINUSOP\n", (p++)-code); break;
-   case NOTOP:       	printf ("%d    NOTOP\n", (p++)-code); break;
-   case ONTJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONTJMP  %d\n", n, c.w);
-			}
-   			break;
-   case ONFJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case JMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    JMP  %d\n", n, c.w);
-			}
-   			break;
-   case UPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    UPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFUPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFUPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case POP:       	printf ("%d    POP\n", (p++)-code); break;
-   case CALLFUNC:	printf ("%d    CALLFUNC\n", (p++)-code); break;
-   case RETCODE:
-    			printf ("%d    RETCODE   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case HALT:		printf ("%d    HALT\n", (p++)-code); break;
-   case SETFUNCTION:
-                        {
-                         CodeWord c1, c2;
-                         int n = p-code;
-                         p++;
-                         get_word(c1,p);
-                         get_word(c2,p);
-                         printf ("%d    SETFUNCTION  %d  %d\n", n, c1.w, c2.w);
-                        }
-                        break;
-   case SETLINE:
-                        {
-                         CodeWord c;
-                         int n = p-code;
-                         p++;
-                         get_word(c,p);
-                         printf ("%d    SETLINE  %d\n", n, c.w);
-                        }
-                        break;
-
-   case RESET:		printf ("%d    RESET\n", (p++)-code); break;
-   default:		printf ("%d    Cannot happen: code %d\n", (p++)-code, *(p-1)); break;
-  }
- }
-}
-#endif
-

luaconf.h

@@ -0,0 +1,695 @@
+/*
+** $Id: luaconf.h,v 1.64 2005/09/06 17:21:03 roberto Exp roberto $
+** Configuration file for Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lconfig_h
+#define lconfig_h
+
+#include <limits.h>
+#include <stddef.h>
+
+
+/*
+** ==================================================================
+** Search for "@@" to find all configurable definitions.
+** ===================================================================
+*/
+
+
+
+
+/*
+@@ LUA_ANSI controls the use of non-ansi features.
+** CHANGE it (define it) if you want Lua to avoid the use of any
+** non-ansi feature or library.
+*/
+#if defined(__STRICT_ANSI__)
+#define LUA_ANSI
+#endif
+
+
+/*
+@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
+@* Lua libraries.
+@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
+@* 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)
+/*
+** 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_PATH_DEFAULT  \
+		".\\?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?\\init.lua;" \
+		             LUA_CDIR"?.lua;"  LUA_CDIR"?\\init.lua"
+#define LUA_CPATH_DEFAULT \
+	".\\?.dll;"  LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll"
+
+#else
+#define LUA_ROOT	"/usr/local/"
+#define LUA_LDIR	LUA_ROOT "share/lua/5.1/"
+#define LUA_CDIR	LUA_ROOT "lib/lua/5.1/"
+#define LUA_PATH_DEFAULT  \
+		"./?.lua;"  LUA_LDIR"?.lua;"  LUA_LDIR"?/init.lua;" \
+		            LUA_CDIR"?.lua;"  LUA_CDIR"?/init.lua"
+#define LUA_CPATH_DEFAULT \
+	"./?.so;"  LUA_CDIR"?.so;" LUA_CDIR"loadall.so"
+#endif
+
+
+/*
+@@ LUA_DIRSEP is the directory separator (for submodules).
+** CHANGE it if your machine does not use "/" as the directory separator
+** and is not Windows. (On Windows Lua automatically uses "\".)
+*/
+#if defined(_WIN32)
+#define LUA_DIRSEP	"\\"
+#else
+#define LUA_DIRSEP	"/"
+#endif
+
+
+/*
+@@ LUA_PATHSEP is the character that separates templates in a path.
+@@ LUA_PATH_MARK is the string that marks the substitution points in a
+@* template.
+@@ LUA_EXECDIR in a Windows path is replaced by the executable's
+@* directory.
+@@ LUA_IGMARK is a mark to ignore all before it when bulding the
+@* luaopen_ function name.
+** CHANGE them if for some reason your system cannot use those
+** characters. (E.g., if one of those characters is a common character
+** in file/directory names.) Probably you do not need to change them.
+*/
+#define LUA_PATHSEP	";"
+#define LUA_PATH_MARK	"?"
+#define LUA_EXECDIR	"!"
+#define LUA_IGMARK	":"
+
+
+/*
+@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
+** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
+** machines, ptrdiff_t gives a good choice between int or long.)
+*/
+#define LUA_INTEGER	ptrdiff_t
+
+
+/*
+@@ LUA_API is a mark for all core API functions.
+@@ LUALIB_API is a mark for all standard library functions.
+** CHANGE them if you need to define those functions in some special way.
+** For instance, if you want to create one Windows DLL with the core and
+** the libraries, you may want to use the following definition (define
+** LUA_BUILD_AS_DLL to get it).
+*/
+#if defined(LUA_BUILD_AS_DLL)
+
+#if defined(LUA_CORE) || defined(LUA_LIB)
+#define LUA_API __declspec(dllexport)
+#else
+#define LUA_API __declspec(dllimport)
+#endif
+
+#else
+
+#define LUA_API		extern
+
+#endif
+
+/* more often than not the libs go together with the core */
+#define LUALIB_API	LUA_API
+
+
+/*
+@@ LUAI_FUNC is a mark for all extern functions that are not to be
+@* exported to outside modules.
+@@ LUAI_DATA is a mark for all extern (const) variables that are not to
+@* be exported to outside modules.
+** 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.
+*/
+#if defined(luaall_c)
+#define LUAI_FUNC	static
+#define LUAI_DATA	/* empty */
+#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
+      defined(__ELF__)
+#define LUAI_FUNC	__attribute__((visibility("hidden"))) extern
+#define LUAI_DATA	LUAI_FUNC
+#else
+#define LUAI_FUNC	extern
+#define LUAI_DATA	extern
+#endif
+
+
+
+/*
+@@ lua_assert describes the internal assertions in Lua.
+** CHANGE that only if you need to debug Lua.
+*/
+#define lua_assert(c)		((void)0)
+
+
+/*
+@@ LUA_QL describes how error messages quote program elements.
+** CHANGE it if you want a different appearance.
+*/
+#define LUA_QL(x)	"'" x "'"
+#define LUA_QS		LUA_QL("%s")
+
+
+/*
+@@ LUA_IDSIZE gives the maximum size for the description of the source
+@* of a function in debug information.
+** CHANGE it if you want a different size.
+*/
+#define LUA_IDSIZE	60
+
+
+/*
+** {==================================================================
+** Stand-alone configuration
+** ===================================================================
+*/
+
+#if defined(lua_c) || defined(luaall_c)
+
+/*
+@@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that
+@* is, whether we're running lua interactively).
+** CHANGE it if you have a better definition for non-POSIX/non-Windows
+** systems.
+*/
+#if !defined(LUA_ANSI) && defined(_POSIX_C_SOURCE)
+#include <unistd.h>
+#define lua_stdin_is_tty()	isatty(0)
+#elif !defined(LUA_ANSI) && defined(_WIN32)
+#include <io.h>
+#include <stdio.h>
+#define lua_stdin_is_tty()	_isatty(_fileno(stdin))
+#else
+#define lua_stdin_is_tty()	1  /* assume stdin is a tty */
+#endif
+
+
+/*
+@@ LUA_PROMPT is the default prompt used by stand-alone Lua.
+@@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua.
+** CHANGE them if you want different prompts. (You can also change the
+** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
+*/
+#define LUA_PROMPT		"> "
+#define LUA_PROMPT2		">> "
+
+
+/*
+@@ LUA_PROGNAME is the default name for the stand-alone Lua program.
+** CHANGE it if your stand-alone interpreter has a different name and
+** your system is not able to detect that name automatically.
+*/
+#define LUA_PROGNAME		"lua"
+
+
+/*
+@@ LUA_MAXINPUT is the maximum length for an input line in the
+@* stand-alone interpreter.
+** CHANGE it if you need longer lines.
+*/
+#define LUA_MAXINPUT	512
+
+
+/*
+@@ lua_readline defines how to show a prompt and then read a line from
+@* the standard input.
+@@ lua_saveline defines how to "save" a read line in a "history".
+@@ lua_freeline defines how to free a line read by lua_readline.
+** CHANGE them if you want to improve this functionality (e.g., by using
+** GNU readline and history facilities).
+*/
+#if defined(LUA_USE_READLINE)
+#include <stdio.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+#define lua_readline(L,b,p)	(((b)=readline(p)) != NULL)
+#define lua_saveline(L,idx) \
+	if (lua_strlen(L,idx) > 0)  /* non-empty line? */ \
+	  add_history(lua_tostring(L, idx));  /* add it to history */
+#define lua_freeline(L,b)	free(b)
+#else
+#define lua_readline(L,b,p)	\
+	(fputs(p, stdout), fflush(stdout),  /* show prompt */ \
+	fgets(b, LUA_MAXINPUT, stdin) != NULL)  /* get line */
+#define lua_saveline(L,idx)	((void)0)
+#define lua_freeline(L,b)	((void)0)
+#endif
+
+#endif
+
+/* }================================================================== */
+
+
+/*
+@@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
+@* as a percentage.
+** CHANGE it if you want the GC to run faster or slower (higher values
+** mean larger pauses which mean slower collection.) You can also change
+** this value dynamically.
+*/
+#define LUAI_GCPAUSE	200  /* 200% (wait memory to double before next GC) */
+
+
+/*
+@@ LUAI_GCMUL defines the default speed of garbage collection relative to
+@* memory allocation as a percentage.
+** CHANGE it if you want to change the granularity of the garbage
+** collection. (Higher values mean coarser collections. 0 represents
+** infinity, where each step performs a full collection.) You can also
+** change this value dynamically.
+*/
+#define LUAI_GCMUL	200 /* GC runs 'twice the speed' of memory allocation */
+
+
+
+/*
+@@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
+** CHANGE it (define it) if you want exact compatibility with the
+** behavior of setn/getn in Lua 5.0.
+*/
+#undef LUA_COMPAT_GETN
+
+/*
+@@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
+** CHANGE it to undefined as soon as you do not need a global 'loadlib'
+** function (the function is still available as 'package.loadlib').
+*/
+#undef LUA_COMPAT_LOADLIB
+
+/*
+@@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
+** CHANGE it to undefined as soon as your programs use only '...' to
+** access vararg parameters (instead of the old 'arg' table).
+*/
+#define LUA_COMPAT_VARARG
+
+/*
+@@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
+** CHANGE it to undefined as soon as your programs use 'math.fmod' or
+** the new '%' operator instead of 'math.mod'.
+*/
+#define LUA_COMPAT_MOD
+
+/*
+@@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
+@* facility.
+** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
+** off the advisory error when nesting [[...]].
+*/
+#define LUA_COMPAT_LSTR		1
+
+/*
+@@ LUA_COMPAT_FIND controls compatibility with old 'string.find' behavior.
+** CHANGE it to undefined as soon as your programs use 'string.find' only
+** to find patterns.
+*/
+#define LUA_COMPAT_FIND
+
+/*
+@@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
+** CHANGE it to undefined as soon as you rename 'string.gfind' to
+** 'string.gmatch'.
+*/
+#define LUA_COMPAT_GFIND
+
+
+/*
+@@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
+@* behavior.
+** CHANGE it to undefined as soon as you replace to 'luaL_registry'
+** your uses of 'luaL_openlib'
+*/
+#define LUA_COMPAT_OPENLIB
+
+
+
+/*
+@@ luai_apicheck is the assert macro used by the Lua-C API.
+** CHANGE luai_apicheck if you want Lua to perform some checks in the
+** parameters it gets from API calls. This may slow down the interpreter
+** a bit, but may be quite useful when debugging C code that interfaces
+** with Lua. A useful redefinition is to use assert.h.
+*/
+#if defined(LUA_USE_APICHECK)
+#include <assert.h>
+#define luai_apicheck(L,o) assert(o)
+#else
+/* (By default lua_assert is empty, so luai_apicheck is also empty.) */
+#define luai_apicheck(L,o)		lua_assert(o)
+#endif
+
+
+/*
+@@ LUAI_BITSINT defines the number of bits in an int.
+** CHANGE here if Lua cannot automatically detect the number of bits of
+** your machine. Probably you do not need to change this.
+*/
+/* avoid overflows in comparison */
+#if INT_MAX-20 < 32760
+#define LUAI_BITSINT	16
+#elif INT_MAX > 2147483640L
+/* int has at least 32 bits */
+#define LUAI_BITSINT	32
+#else
+#error "you must define LUA_BITSINT with number of bits in an integer"
+#endif
+
+
+/*
+@@ LUAI_UINT32 is an unsigned integer with at least 32 bits.
+@@ LUAI_INT32 is an signed integer with at least 32 bits.
+@@ LUAI_UMEM is an unsigned integer big enough to count the total
+@* memory used by Lua.
+@@ LUAI_MEM is a signed integer big enough to count the total memory
+@* used by Lua.
+** CHANGE here if for some weird reason the default definitions are not
+** good enough for your machine. (The definitions in the 'else'
+** part always works, but may waste space on machines with 64-bit
+** longs.) Probably you do not need to change this.
+*/
+#if LUAI_BITSINT >= 32
+#define LUAI_UINT32	unsigned int
+#define LUAI_INT32	int
+#define LUAI_MAXINT32	INT_MAX
+#define LUAI_UMEM	size_t
+#define LUAI_MEM	ptrdiff_t
+#else
+/* 16-bit ints */
+#define LUAI_UINT32	unsigned long
+#define LUAI_INT32	long
+#define LUAI_MAXINT32	LONG_MAX
+#define LUAI_UMEM	unsigned long
+#define LUAI_MEM	long
+#endif
+
+
+/*
+@@ LUAI_MAXCALLS limits the number of nested calls.
+** CHANGE it if you need really deep recursive calls. This limit is
+** arbitrary; its only purpose is to stop infinite recursion before
+** exhausting memory.
+*/
+#define LUAI_MAXCALLS	20000
+
+
+/*
+@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
+@* can use.
+** CHANGE it if you need lots of (Lua) stack space for your C
+** functions. This limit is arbitrary; its only purpose is to stop C
+** functions to consume unlimited stack space.
+*/
+#define LUAI_MAXCSTACK	2048
+
+
+
+/*
+** {==================================================================
+** CHANGE (to smaller values) the following definitions if your system
+** has a small C stack. (Or you may want to change them to larger
+** values if your system has a large C stack and these limits are
+** too rigid for you.) Some of these constants control the size of
+** stack-allocated arrays used by the compiler or the interpreter, while
+** others limit the maximum number of recursive calls that the compiler
+** or the interpreter can perform. Values too large may cause a C stack
+** overflow for some forms of deep constructs.
+** ===================================================================
+*/
+
+
+/*
+@@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
+@* syntactical nested non-terminals in a program.
+*/
+#define LUAI_MAXCCALLS		200
+
+
+/*
+@@ LUAI_MAXVARS is the maximum number of local variables per function
+@* (must be smaller than 250).
+*/
+#define LUAI_MAXVARS		200
+
+
+/*
+@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
+@* (must be smaller than 250).
+*/
+#define LUAI_MAXUPVALUES	60
+
+
+/*
+@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
+*/
+#define LUAL_BUFFERSIZE		BUFSIZ
+
+/* }================================================================== */
+
+
+
+/*
+@@ lua_number2int is a macro to convert lua_Number to int.
+@@ lua_number2integer is a macro to convert lua_Number to lua_Integer.
+** CHANGE them if you know a faster way to convert a lua_Number to
+** int (with any rounding method and without throwing errors) in your
+** system. In Pentium machines, a naive typecast from double to int
+** in C is extremely slow, so any alternative is worth trying.
+*/
+
+/* On a Pentium, resort to a trick */
+#if !defined(LUA_ANSI) && !defined(__SSE2__) && \
+    (defined(__i386) || defined (_M_IX86))
+union luai_Cast { double l_d; long l_l; };
+#define lua_number2int(i,d) \
+  { volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
+#define lua_number2integer(i,n)		lua_number2int(i, n)
+
+/* this option always works, but may be slow */
+#else
+#define lua_number2int(i,d)	((i)=(int)(d))
+#define lua_number2integer(i,d)	((i)=(lua_Integer)(d))
+
+#endif
+
+
+
+/*
+** {==================================================================
+@@ LUA_NUMBER is the type of numbers in Lua.
+** CHANGE the following definitions only if you want to build Lua
+** with a number type different from double. You may also need to
+** change lua_number2int & lua_number2integer.
+** ===================================================================
+*/
+
+#define LUA_NUMBER	double
+
+/*
+@@ LUAI_UACNUMBER is the result of an 'usual argument conversion'
+@* over a number.
+*/
+#define LUAI_UACNUMBER	double
+
+
+/*
+@@ LUA_NUMBER_SCAN is the format for reading numbers.
+@@ LUA_NUMBER_FMT is the format for writing numbers.
+@@ lua_number2str converts a number to a string.
+@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
+@@ lua_str2number converts a string to a number.
+*/
+#define LUA_NUMBER_SCAN		"%lf"
+#define LUA_NUMBER_FMT		"%.14g"
+#define lua_number2str(s,n)	sprintf((s), LUA_NUMBER_FMT, (n))
+#define LUAI_MAXNUMBER2STR	32 /* 16 digits, sign, point, and \0 */
+#define lua_str2number(s,p)	strtod((s), (p))
+
+
+/*
+@@ The luai_num* macros define the primitive operations over numbers.
+*/
+#define luai_numadd(L,a,b)	((a)+(b))
+#define luai_numsub(L,a,b)	((a)-(b))
+#define luai_nummul(L,a,b)	((a)*(b))
+#define luai_numdiv(L,a,b)	((a)/(b))
+#define luai_nummod(L,a,b)	((a) - floor((a)/(b))*(b))
+#define luai_numpow(L,a,b)	pow(a,b)
+#define luai_numunm(L,a)	(-(a))
+#define luai_numeq(L,a,b)	((a)==(b))
+#define luai_numlt(L,a,b)	((a)<(b))
+#define luai_numle(L,a,b)	((a)<=(b))
+
+/* }================================================================== */
+
+
+/*
+@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
+** CHANGE it if your system requires alignments larger than double. (For
+** instance, if your system supports long doubles and they must be
+** aligned in 16-byte boundaries, then you should add long double in the
+** union.) Probably you do not need to change this.
+*/
+#define LUAI_USER_ALIGNMENT_T	union { double u; void *s; long l; }
+
+
+/*
+@@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
+** CHANGE them if you prefer to use longjmp/setjmp even with C++
+** or if want/don't to use _longjmp/_setjmp instead of regular
+** longjmp/setjmp. By default, Lua handles errors with exceptions when
+** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
+** and with longjmp/setjmp otherwise.
+*/
+#if defined(__cplusplus)
+/* 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)
+/* in Unix, try _longjmp/_setjmp (more efficient) */
+#define LUAI_THROW(L,c)	_longjmp((c)->b, 1)
+#define LUAI_TRY(L,c,a)	if (_setjmp((c)->b) == 0) { a }
+#define luai_jmpbuf	jmp_buf
+
+#else
+/* default handling with long jumps */
+#define LUAI_THROW(L,c)	longjmp((c)->b, 1)
+#define LUAI_TRY(L,c,a)	if (setjmp((c)->b) == 0) { a }
+#define luai_jmpbuf	jmp_buf
+
+#endif
+
+
+/*
+@@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
+@* can do during pattern-matching.
+** CHANGE it if you need more captures. This limit is arbitrary.
+*/
+#define LUA_MAXCAPTURES		32
+
+
+/*
+@@ lua_tmpnam is the function that the OS library uses to create a
+@* temporary name.
+@@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
+** CHANGE them if you have an alternative to tmpnam (which is considered
+** insecure) or if you want the original tmpnam anyway.  By default, Lua
+** uses tmpnam except when POSIX is available, where it uses mkstemp.
+*/
+#if defined(loslib_c) || defined(luaall_c)
+
+#if !defined(LUA_ANSI) && defined(_POSIX_C_SOURCE)
+#include <unistd.h>
+#define LUA_TMPNAMBUFSIZE	32
+#define lua_tmpnam(b,e)	{ \
+	strcpy(b, "/tmp/lua_XXXXXX"); \
+	e = mkstemp(b); \
+	if (e != -1) close(e); \
+	e = (e == -1); }
+#else
+#define LUA_TMPNAMBUFSIZE	L_tmpnam
+#define lua_tmpnam(b,e)		{ e = (tmpnam(b) == NULL); }
+#endif
+
+#endif
+
+
+/*
+@@ lua_popen spawns a new process connected to the current one through
+@* the file streams.
+** CHANGE it if you have a way to implement it in your system.
+*/
+#if !defined(LUA_ANSI) && defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 2
+
+#define lua_popen(L,c,m)	popen(c,m)
+#define lua_pclose(L,file)	(pclose(file) != -1)
+
+#elif !defined(LUA_ANSI) && defined(_WIN32)
+
+#define lua_popen(L,c,m)	_popen(c,m)
+#define lua_pclose(L,file)	(_pclose(file) != -1)
+
+#else
+
+#define lua_popen(L,c,m)  \
+  ((void)c, (void)m, luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
+#define lua_pclose(L,file)		((void)file, 0)
+
+#endif
+
+/*
+@@ LUA_DL_* define which dynamic-library system Lua should use.
+** CHANGE here if Lua has problems choosing the appropriate
+** dynamic-library system for your platform (either Windows' DLL, Mac's
+** dyld, or Unix's dlopen). If your system is some kind of Unix, there
+** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
+** it.  To use dlopen you also need to adapt the src/Makefile (probably
+** adding -ldl to the linker options), so Lua does not select it
+** automatically.  (When you change the makefile to add -ldl, you must
+** also add -DLUA_USE_DLOPEN.)
+** If you do not want any kind of dynamic library, undefine all these
+** options (or just remove these definitions).
+*/
+#if !defined(LUA_ANSI) 
+#if defined(_WIN32)
+#define LUA_DL_DLL
+#elif defined(__APPLE__) && defined(__MACH__)
+#define LUA_DL_DYLD
+#elif defined(LUA_USE_DLOPEN)
+#define LUA_DL_DLOPEN
+#endif
+#endif
+
+
+/*
+@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
+@* (the data goes just *before* the lua_State pointer).
+** CHANGE (define) this if you really need that. This value must be
+** a multiple of the maximum alignment required for your machine.
+*/
+#define LUAI_EXTRASPACE		0
+
+
+/*
+@@ luai_userstate* allow user-specific actions on threads.
+** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
+** extra when a thread is created/deleted/resumed/yielded.
+*/
+#define luai_userstateopen(L)		((void)0)
+#define luai_userstatefree(L)		((void)0)
+#define luai_userstateresume(L,n)	((void)0)
+#define luai_userstateyield(L,n)	((void)0)
+
+
+
+
+/* =================================================================== */
+
+/*
+** Local configuration. You can use this space to add your redefinitions
+** without modifying the main part of the file.
+*/
+
+
+
+#endif
+

lualib.h

@@ -1,16 +1,47 @@
 /*
-** Libraries to be used in LUA programs
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: $
+** $Id: lualib.h,v 1.34 2005/04/13 17:24:20 roberto Exp roberto $
+** Lua standard libraries
+** See Copyright Notice in lua.h
 */
 
+
 #ifndef lualib_h
 #define lualib_h
 
-void iolib_open   (void);
-void strlib_open  (void);
-void mathlib_open (void);
+#include "lua.h"
+
+
+/* Key to file-handle type */
+#define LUA_FILEHANDLE		"FILE*"
+
+
+#define LUA_COLIBNAME	"coroutine"
+LUALIB_API int (luaopen_base) (lua_State *L);
+
+#define LUA_TABLIBNAME	"table"
+LUALIB_API int (luaopen_table) (lua_State *L);
+
+#define LUA_IOLIBNAME	"io"
+LUALIB_API int (luaopen_io) (lua_State *L);
+
+#define LUA_OSLIBNAME	"os"
+LUALIB_API int (luaopen_os) (lua_State *L);
+
+#define LUA_STRLIBNAME	"string"
+LUALIB_API int (luaopen_string) (lua_State *L);
+
+#define LUA_MATHLIBNAME	"math"
+LUALIB_API int (luaopen_math) (lua_State *L);
+
+#define LUA_DBLIBNAME	"debug"
+LUALIB_API int (luaopen_debug) (lua_State *L);
+
+#define LUA_LOADLIBNAME	"package"
+LUALIB_API int (luaopen_package) (lua_State *L);
+
+
+/* open all previous libraries */
+LUALIB_API void (luaL_openlibs) (lua_State *L); 
+
 
 #endif
-

lundump.c

@@ -0,0 +1,296 @@
+/*
+** $Id: lundump.c,v 2.4 2005/05/05 20:47:02 roberto Exp roberto $
+** load pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#define lundump_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+#include "lzio.h"
+
+#define	LoadByte	(lu_byte) ezgetc
+
+typedef struct {
+ lua_State* L;
+ ZIO* Z;
+ Mbuffer* b;
+ int swap;
+ const char* name;
+} LoadState;
+
+static void unexpectedEOZ (LoadState* S)
+{
+ luaG_runerror(S->L,"unexpected end of file in %s",S->name);
+}
+
+static int ezgetc (LoadState* S)
+{
+ int c=zgetc(S->Z);
+ if (c==EOZ) unexpectedEOZ(S);
+ return c;
+}
+
+static void ezread (LoadState* S, void* b, size_t n)
+{
+ size_t r=luaZ_read(S->Z,b,n);
+ if (r!=0) unexpectedEOZ(S);
+}
+
+static void LoadBlock (LoadState* S, void* b, size_t size)
+{
+ if (S->swap)
+ {
+  char* p=(char*) b+size-1;
+  size_t n=size;
+  while (n--) *p--=(char)ezgetc(S);
+ }
+ else
+  ezread(S,b,size);
+}
+
+static void LoadVector (LoadState* S, void* b, int m, size_t size)
+{
+ if (S->swap)
+ {
+  char* q=(char*) b;
+  while (m--)
+  {
+   char* p=q+size-1;
+   size_t n=size;
+   while (n--) *p--=(char)ezgetc(S);
+   q+=size;
+  }
+ }
+ else
+  ezread(S,b,m*size);
+}
+
+static int LoadInt (LoadState* S)
+{
+ int x;
+ LoadBlock(S,&x,sizeof(x));
+ if (x<0) luaG_runerror(S->L,"bad integer in %s",S->name);
+ return x;
+}
+
+static size_t LoadSize (LoadState* S)
+{
+ size_t x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static lua_Number LoadNumber (LoadState* S)
+{
+ lua_Number x;
+ LoadBlock(S,&x,sizeof(x));
+ return x;
+}
+
+static TString* LoadString (LoadState* S)
+{
+ size_t size=LoadSize(S);
+ if (size==0)
+  return NULL;
+ else
+ {
+  char* s=luaZ_openspace(S->L,S->b,size);
+  ezread(S,s,size);
+  return luaS_newlstr(S->L,s,size-1);		/* remove trailing '\0' */
+ }
+}
+
+static void LoadCode (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->code=luaM_newvector(S->L,size,Instruction);
+ f->sizecode=size;
+ LoadVector(S,f->code,size,sizeof(*f->code));
+}
+
+static void LoadLocals (LoadState* S, Proto* f)
+{
+ int i,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);
+ }
+}
+
+static void LoadLines (LoadState* S, Proto* f)
+{
+ int size=LoadInt(S);
+ f->lineinfo=luaM_newvector(S->L,size,int);
+ f->sizelineinfo=size;
+ LoadVector(S,f->lineinfo,size,sizeof(*f->lineinfo));
+}
+
+static void LoadUpvalues (LoadState* S, Proto* f)
+{
+ int i,n;
+ n=LoadInt(S);
+ if (n!=0 && n!=f->nups) 
+  luaG_runerror(S->L,"bad nupvalues in %s: read %d; expected %d",
+		S->name,n,f->nups);
+ f->upvalues=luaM_newvector(S->L,n,TString*);
+ f->sizeupvalues=n;
+ for (i=0; i<n; i++) f->upvalues[i]=NULL;
+ for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p);
+
+static void LoadConstants (LoadState* S, Proto* f)
+{
+ int i,n;
+ lua_State *L=S->L;
+ n=LoadInt(S);
+ f->k=luaM_newvector(L,n,TValue);
+ f->sizek=n;
+ for (i=0; i<n; i++) setnilvalue(&f->k[i]);
+ for (i=0; i<n; i++)
+ {
+  TValue* o=&f->k[i];
+  int t=LoadByte(S);
+  switch (t)
+  {
+   case LUA_TNUMBER:
+	setnvalue(o,LoadNumber(S));
+	break;
+   case LUA_TSTRING:
+	setsvalue2n(L, o,LoadString(S));
+	break;
+   case LUA_TNIL:
+   	setnilvalue(o);
+	break;
+   case LUA_TBOOLEAN:
+        setbvalue(o, LoadByte(S));
+	break;
+   default:
+	luaG_runerror(L,"bad constant type (%d) in %s",t,S->name);
+	break;
+  }
+ }
+ n=LoadInt(S);
+ f->p=luaM_newvector(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]=LoadFunction(S,f->source);
+}
+
+static Proto* LoadFunction (LoadState* S, TString* p)
+{
+ lua_State *L=S->L;
+ Proto* f=luaF_newproto(L);
+ setptvalue2s(L, L->top, f);
+ incr_top(L);
+ f->source=LoadString(S); if (f->source==NULL) f->source=p;
+ f->linedefined=LoadInt(S);
+ f->lastlinedefined=LoadInt(S);
+ f->nups=LoadByte(S);
+ f->numparams=LoadByte(S);
+ f->is_vararg=LoadByte(S);
+ f->maxstacksize=LoadByte(S);
+ LoadLines(S,f);
+ LoadLocals(S,f);
+ LoadUpvalues(S,f);
+ LoadConstants(S,f);
+ LoadCode(S,f);
+#ifndef TRUST_BINARIES
+ if (!luaG_checkcode(f)) luaG_runerror(L,"bad code in %s",S->name);
+#endif
+ L->top--;
+ return f;
+}
+
+static void LoadSignature (LoadState* S)
+{
+ const char* s=LUA_SIGNATURE;
+ while (*s!=0 && ezgetc(S)==*s)
+  ++s;
+ if (*s!=0) luaG_runerror(S->L,"bad signature in %s",S->name);
+}
+
+static void TestSize (LoadState* S, int s, const char* what)
+{
+ int r=LoadByte(S);
+ if (r!=s)
+  luaG_runerror(S->L,"virtual machine mismatch in %s: "
+	"size of %s is %d but read %d",S->name,what,s,r);
+}
+
+#define TESTSIZE(s,w)	TestSize(S,s,w)
+#define V(v)		v/16,v%16
+
+static void LoadHeader (LoadState* S)
+{
+ int version;
+ lua_Number x,tx=TEST_NUMBER;
+ LoadSignature(S);
+ version=LoadByte(S);
+ if (version>VERSION)
+  luaG_runerror(S->L,"%s too new: "
+	"read version %d.%d; expected at most %d.%d",
+	S->name,V(version),V(VERSION));
+ if (version<VERSION0)				/* check last major change */
+  luaG_runerror(S->L,"%s too old: "
+	"read version %d.%d; expected at least %d.%d",
+	S->name,V(version),V(VERSION0));
+ S->swap=(luaU_endianness()!=LoadByte(S));	/* need to swap bytes? */
+ TESTSIZE(sizeof(int),"int");
+ TESTSIZE(sizeof(size_t), "size_t");
+ TESTSIZE(sizeof(Instruction), "Instruction");
+ TESTSIZE(sizeof(lua_Number), "number");
+ x=LoadNumber(S);
+ if ((long)x!=(long)tx)		/* disregard errors in last bits of fraction */
+  luaG_runerror(S->L,"unknown number format in %s",S->name);
+}
+
+static Proto* LoadChunk (LoadState* S)
+{
+ LoadHeader(S);
+ return LoadFunction(S,NULL);
+}
+
+/*
+** load precompiled chunk
+*/
+Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char *s)
+{
+ LoadState S;
+ if (*s=='@' || *s=='=')
+  S.name=s+1;
+ else if (*s==LUA_SIGNATURE[0])
+  S.name="binary string";
+ else
+  S.name=s;
+ S.L=L;
+ S.Z=Z;
+ S.b=buff;
+ return LoadChunk(&S);
+}
+
+/*
+** find byte order
+*/
+int luaU_endianness (void)
+{
+ int x=1;
+ return *(char*)&x;
+}

lundump.h

@@ -0,0 +1,35 @@
+/*
+** $Id: lundump.h,v 1.35 2005/04/25 19:24:10 roberto Exp roberto $
+** load pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lundump_h
+#define lundump_h
+
+#include "lobject.h"
+#include "lzio.h"
+
+/* load one chunk; from lundump.c */
+LUAI_FUNC Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff,
+                                                    const char *name);
+
+/* find byte order; from lundump.c */
+LUAI_FUNC int luaU_endianness (void);
+
+/* dump one chunk; from ldump.c */
+LUAI_FUNC int luaU_dump (lua_State* L, const Proto* Main, lua_Writer w,
+                                       void* data, int strip);
+
+/* print one chunk; from print.c */
+LUAI_FUNC void luaU_print (const Proto* Main);
+
+/* definitions for headers of binary files */
+#define	VERSION		0x50		/* last format change was in 5.0 */
+#define	VERSION0	0x50		/* last major  change was in 5.0 */
+
+/* a multiple of PI for testing native format */
+/* multiplying by 1E7 gives non-trivial integer values */
+#define	TEST_NUMBER	((lua_Number)3.14159265358979323846E7)
+
+#endif

lvm.c

@@ -0,0 +1,792 @@
+/*
+** $Id: lvm.c,v 2.54 2005/08/29 20:49:21 roberto Exp roberto $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define lvm_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lvm.h"
+
+
+
+/* limit for table tag-method chains (to avoid loops) */
+#define MAXTAGLOOP	100
+
+
+const TValue *luaV_tonumber (const TValue *obj, TValue *n) {
+  lua_Number num;
+  if (ttisnumber(obj)) return obj;
+  if (ttisstring(obj) && luaO_str2d(svalue(obj), &num)) {
+    setnvalue(n, num);
+    return n;
+  }
+  else
+    return NULL;
+}
+
+
+int luaV_tostring (lua_State *L, StkId obj) {
+  if (!ttisnumber(obj))
+    return 0;
+  else {
+    char s[LUAI_MAXNUMBER2STR];
+    lua_Number n = nvalue(obj);
+    lua_number2str(s, n);
+    setsvalue2s(L, obj, luaS_new(L, s));
+    return 1;
+  }
+}
+
+
+static void traceexec (lua_State *L, const Instruction *pc) {
+  lu_byte mask = L->hookmask;
+  const Instruction *oldpc = L->savedpc;
+  L->savedpc = pc;
+  if (mask > LUA_MASKLINE) {  /* instruction-hook set? */
+    if (L->hookcount == 0) {
+      resethookcount(L);
+      luaD_callhook(L, LUA_HOOKCOUNT, -1);
+      return;
+    }
+  }
+  if (mask & LUA_MASKLINE) {
+    Proto *p = ci_func(L->ci)->l.p;
+    int npc = pcRel(pc, p);
+    int newline = getline(p, npc);
+    /* call linehook when enter a new function, when jump back (loop),
+       or when enter a new line */
+    if (npc == 0 || pc <= oldpc || newline != getline(p, pcRel(oldpc, p)))
+      luaD_callhook(L, LUA_HOOKLINE, newline);
+  }
+}
+
+
+static void callTMres (lua_State *L, StkId res, const TValue *f,
+                        const TValue *p1, const TValue *p2) {
+  ptrdiff_t result = savestack(L, res);
+  setobj2s(L, L->top, f);  /* push function */
+  setobj2s(L, L->top+1, p1);  /* 1st argument */
+  setobj2s(L, L->top+2, p2);  /* 2nd argument */
+  luaD_checkstack(L, 3);
+  L->top += 3;
+  luaD_call(L, L->top - 3, 1);
+  res = restorestack(L, result);
+  L->top--;
+  setobjs2s(L, res, L->top);
+}
+
+
+
+static void callTM (lua_State *L, const TValue *f, const TValue *p1,                                const TValue *p2, const TValue *p3) {
+  setobj2s(L, L->top, f);  /* push function */
+  setobj2s(L, L->top+1, p1);  /* 1st argument */
+  setobj2s(L, L->top+2, p2);  /* 2nd argument */
+  setobj2s(L, L->top+3, p3);  /* 3th argument */
+  luaD_checkstack(L, 4);
+  L->top += 4;
+  luaD_call(L, L->top - 4, 0);
+}
+
+
+void luaV_gettable (lua_State *L, const TValue *t, TValue *key, StkId val) {
+  int loop;
+  for (loop = 0; loop < MAXTAGLOOP; loop++) {
+    const TValue *tm;
+    if (ttistable(t)) {  /* `t' is a table? */
+      Table *h = hvalue(t);
+      const TValue *res = luaH_get(h, key); /* do a primitive get */
+      if (!ttisnil(res) ||  /* result is no nil? */
+          (tm = fasttm(L, h->metatable, TM_INDEX)) == NULL) { /* or no TM? */
+        setobj2s(L, val, res);
+        return;
+      }
+      /* else will try the tag method */
+    }
+    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_INDEX)))
+      luaG_typeerror(L, t, "index");
+    if (ttisfunction(tm)) {
+      callTMres(L, val, tm, t, key);
+      return;
+    }
+    t = tm;  /* else repeat with `tm' */ 
+  }
+  luaG_runerror(L, "loop in gettable");
+}
+
+
+void luaV_settable (lua_State *L, const TValue *t, TValue *key, StkId val) {
+  int loop;
+  for (loop = 0; loop < MAXTAGLOOP; loop++) {
+    const TValue *tm;
+    if (ttistable(t)) {  /* `t' is a table? */
+      Table *h = hvalue(t);
+      TValue *oldval = luaH_set(L, h, key); /* do a primitive set */
+      if (!ttisnil(oldval) ||  /* result is no nil? */
+          (tm = fasttm(L, h->metatable, TM_NEWINDEX)) == NULL) { /* or no TM? */
+        setobj2t(L, oldval, val);
+        luaC_barriert(L, h, val);
+        return;
+      }
+      /* else will try the tag method */
+    }
+    else if (ttisnil(tm = luaT_gettmbyobj(L, t, TM_NEWINDEX)))
+      luaG_typeerror(L, t, "index");
+    if (ttisfunction(tm)) {
+      callTM(L, tm, t, key, val);
+      return;
+    }
+    t = tm;  /* else repeat with `tm' */ 
+  }
+  luaG_runerror(L, "loop in settable");
+}
+
+
+static int call_binTM (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 (!ttisfunction(tm)) return 0;
+  callTMres(L, res, tm, p1, p2);
+  return 1;
+}
+
+
+static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
+                                  TMS event) {
+  const TValue *tm1 = fasttm(L, mt1, event);
+  const TValue *tm2;
+  if (tm1 == NULL) return NULL;  /* no metamethod */
+  if (mt1 == mt2) return tm1;  /* same metatables => same metamethods */
+  tm2 = fasttm(L, mt2, event);
+  if (tm2 == NULL) return NULL;  /* no metamethod */
+  if (luaO_rawequalObj(tm1, tm2))  /* same metamethods? */
+    return tm1;
+  return NULL;
+}
+
+
+static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
+                         TMS event) {
+  const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
+  const TValue *tm2;
+  if (ttisnil(tm1)) return -1;  /* no metamethod? */
+  tm2 = luaT_gettmbyobj(L, p2, event);
+  if (!luaO_rawequalObj(tm1, tm2))  /* different metamethods? */
+    return -1;
+  callTMres(L, L->top, tm1, p1, p2);
+  return !l_isfalse(L->top);
+}
+
+
+static int l_strcmp (const TString *ls, const TString *rs) {
+  const char *l = getstr(ls);
+  size_t ll = ls->tsv.len;
+  const char *r = getstr(rs);
+  size_t lr = rs->tsv.len;
+  for (;;) {
+    int temp = strcoll(l, r);
+    if (temp != 0) return temp;
+    else {  /* strings are equal up to a `\0' */
+      size_t len = strlen(l);  /* index of first `\0' in both strings */
+      if (len == lr)  /* r is finished? */
+        return (len == ll) ? 0 : 1;
+      else if (len == ll)  /* l is finished? */
+        return -1;  /* l is smaller than r (because r is not finished) */
+      /* both strings longer than `len'; go on comparing (after the `\0') */
+      len++;
+      l += len; ll -= len; r += len; lr -= len;
+    }
+  }
+}
+
+
+int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r) {
+  int res;
+  if (ttype(l) != ttype(r))
+    return luaG_ordererror(L, l, r);
+  else if (ttisnumber(l))
+    return luai_numlt(L, nvalue(l), nvalue(r));
+  else if (ttisstring(l))
+    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) < 0;
+  else if ((res = call_orderTM(L, l, r, TM_LT)) != -1)
+    return res;
+  return luaG_ordererror(L, l, r);
+}
+
+
+static int lessequal (lua_State *L, const TValue *l, const TValue *r) {
+  int res;
+  if (ttype(l) != ttype(r))
+    return luaG_ordererror(L, l, r);
+  else if (ttisnumber(l))
+    return luai_numle(L, nvalue(l), nvalue(r));
+  else if (ttisstring(l))
+    return l_strcmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
+  else if ((res = call_orderTM(L, l, r, TM_LE)) != -1)  /* first try `le' */
+    return res;
+  else if ((res = call_orderTM(L, r, l, TM_LT)) != -1)  /* else try `lt' */
+    return !res;
+  return luaG_ordererror(L, l, r);
+}
+
+
+int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2) {
+  const TValue *tm;
+  lua_assert(ttype(t1) == ttype(t2));
+  switch (ttype(t1)) {
+    case LUA_TNIL: return 1;
+    case LUA_TNUMBER: return luai_numeq(L, nvalue(t1), nvalue(t2));
+    case LUA_TBOOLEAN: return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
+    case LUA_TLIGHTUSERDATA: return pvalue(t1) == pvalue(t2);
+    case LUA_TUSERDATA: {
+      if (uvalue(t1) == uvalue(t2)) return 1;
+      tm = get_compTM(L, uvalue(t1)->metatable, uvalue(t2)->metatable,
+                         TM_EQ);
+      break;  /* will try TM */
+    }
+    case LUA_TTABLE: {
+      if (hvalue(t1) == hvalue(t2)) return 1;
+      tm = get_compTM(L, hvalue(t1)->metatable, hvalue(t2)->metatable, TM_EQ);
+      break;  /* will try TM */
+    }
+    default: return gcvalue(t1) == gcvalue(t2);
+  }
+  if (tm == NULL) return 0;  /* no TM? */
+  callTMres(L, L->top, tm, t1, t2);  /* call TM */
+  return !l_isfalse(L->top);
+}
+
+
+void luaV_concat (lua_State *L, int total, int last) {
+  do {
+    StkId top = L->base + last + 1;
+    int n = 2;  /* number of elements handled in this pass (at least 2) */
+    if (!tostring(L, top-2) || !tostring(L, top-1)) {
+      if (!call_binTM(L, top-2, top-1, top-2, TM_CONCAT))
+        luaG_concaterror(L, top-2, top-1);
+    } else if (tsvalue(top-1)->len > 0) {  /* if len=0, do nothing */
+      /* at least two string values; get as many as possible */
+      size_t tl = tsvalue(top-1)->len;
+      char *buffer;
+      int i;
+      /* collect total length */
+      for (n = 1; n < total && tostring(L, top-n-1); n++) {
+        size_t l = tsvalue(top-n-1)->len;
+        if (l >= MAX_SIZET - tl) luaG_runerror(L, "string length overflow");
+        tl += l;
+      }
+      buffer = luaZ_openspace(L, &G(L)->buff, tl);
+      tl = 0;
+      for (i=n; i>0; i--) {  /* concat all strings */
+        size_t l = tsvalue(top-i)->len;
+        memcpy(buffer+tl, svalue(top-i), l);
+        tl += l;
+      }
+      setsvalue2s(L, top-n, luaS_newlstr(L, buffer, tl));
+    }
+    total -= n-1;  /* got `n' strings to create 1 new */
+    last -= n-1;
+  } while (total > 1);  /* repeat until only 1 result left */
+}
+
+
+static void Arith (lua_State *L, StkId ra, const TValue *rb,
+                   const TValue *rc, TMS op) {
+  TValue tempb, tempc;
+  const TValue *b, *c;
+  if ((b = luaV_tonumber(rb, &tempb)) != NULL &&
+      (c = luaV_tonumber(rc, &tempc)) != NULL) {
+    lua_Number nb = nvalue(b), nc = nvalue(c);
+    switch (op) {
+      case TM_ADD: setnvalue(ra, luai_numadd(L, nb, nc)); break;
+      case TM_SUB: setnvalue(ra, luai_numsub(L, nb, nc)); break;
+      case TM_MUL: setnvalue(ra, luai_nummul(L, nb, nc)); break;
+      case TM_DIV: setnvalue(ra, luai_numdiv(L, nb, nc)); break;
+      case TM_MOD: setnvalue(ra, luai_nummod(L, nb, nc)); break;
+      case TM_POW: setnvalue(ra, luai_numpow(L, nb, nc)); break;
+      case TM_UNM: setnvalue(ra, luai_numunm(L, nb)); break;
+      default: lua_assert(0); break;
+    }
+  }
+  else if (!call_binTM(L, rb, rc, ra, op))
+    luaG_aritherror(L, rb, rc);
+}
+
+
+
+/*
+** some macros for common tasks in `luaV_execute'
+*/
+
+#define runtime_check(L, c)	{ if (!(c)) break; }
+
+#define RA(i)	(base+GETARG_A(i))
+/* to be used after possible stack reallocation */
+#define RB(i)	check_exp(getBMode(GET_OPCODE(i)) == OpArgR, base+GETARG_B(i))
+#define RC(i)	check_exp(getCMode(GET_OPCODE(i)) == OpArgR, base+GETARG_C(i))
+#define RKB(i)	check_exp(getBMode(GET_OPCODE(i)) == OpArgK, \
+	ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i))
+#define RKC(i)	check_exp(getCMode(GET_OPCODE(i)) == OpArgK, \
+	ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i))
+#define KBx(i)	check_exp(getBMode(GET_OPCODE(i)) == OpArgK, k+GETARG_Bx(i))
+
+
+#define dojump(L,pc,i)	{(pc) += (i); luai_threadyield(L);}
+
+
+#define Protect(x)	{ L->savedpc = pc; {x;}; base = L->base; }
+
+
+void luaV_execute (lua_State *L, int nexeccalls) {
+  LClosure *cl;
+  StkId base;
+  TValue *k;
+  const Instruction *pc;
+ reentry:  /* entry point */
+  pc = L->savedpc;
+  cl = &clvalue(L->ci->func)->l;
+  base = L->base;
+  k = cl->p->k;
+  /* main loop of interpreter */
+  for (;;) {
+    const Instruction i = *pc++;
+    StkId ra;
+    if ((L->hookmask & (LUA_MASKLINE | LUA_MASKCOUNT)) &&
+        (--L->hookcount == 0 || L->hookmask & LUA_MASKLINE)) {
+      traceexec(L, pc);
+      if (L->status == LUA_YIELD) {  /* did hook yield? */
+        L->savedpc = pc - 1;
+        return;
+      }
+      base = L->base;
+    }
+    /* warning!! several calls may realloc the stack and invalidate `ra' */
+    ra = RA(i);
+    lua_assert(base == L->base && L->base == L->ci->base);
+    lua_assert(base <= L->top && L->top <= L->stack + L->stacksize);
+    lua_assert(L->top == L->ci->top || luaG_checkopenop(i));
+    switch (GET_OPCODE(i)) {
+      case OP_MOVE: {
+        setobjs2s(L, ra, RB(i));
+        continue;
+      }
+      case OP_LOADK: {
+        setobj2s(L, ra, KBx(i));
+        continue;
+      }
+      case OP_LOADBOOL: {
+        setbvalue(ra, GETARG_B(i));
+        if (GETARG_C(i)) pc++;  /* skip next instruction (if C) */
+        continue;
+      }
+      case OP_LOADNIL: {
+        TValue *rb = RB(i);
+        do {
+          setnilvalue(rb--);
+        } while (rb >= ra);
+        continue;
+      }
+      case OP_GETUPVAL: {
+        int b = GETARG_B(i);
+        setobj2s(L, ra, cl->upvals[b]->v);
+        continue;
+      }
+      case OP_GETGLOBAL: {
+        TValue g;
+        TValue *rb = KBx(i);
+        sethvalue(L, &g, cl->env);
+        lua_assert(ttisstring(rb));
+        Protect(luaV_gettable(L, &g, rb, ra));
+        continue;
+      }
+      case OP_GETTABLE: {
+        Protect(luaV_gettable(L, RB(i), RKC(i), ra));
+        continue;
+      }
+      case OP_SETGLOBAL: {
+        TValue g;
+        sethvalue(L, &g, cl->env);
+        lua_assert(ttisstring(KBx(i)));
+        Protect(luaV_settable(L, &g, KBx(i), ra));
+        continue;
+      }
+      case OP_SETUPVAL: {
+        UpVal *uv = cl->upvals[GETARG_B(i)];
+        setobj(L, uv->v, ra);
+        luaC_barrier(L, uv, ra);
+        continue;
+      }
+      case OP_SETTABLE: {
+        Protect(luaV_settable(L, ra, RKB(i), RKC(i)));
+        continue;
+      }
+      case OP_NEWTABLE: {
+        int b = GETARG_B(i);
+        int c = GETARG_C(i);
+        sethvalue(L, ra, luaH_new(L, luaO_fb2int(b), luaO_fb2int(c)));
+        Protect(luaC_checkGC(L));
+        continue;
+      }
+      case OP_SELF: {
+        StkId rb = RB(i);
+        setobjs2s(L, ra+1, rb);
+        Protect(luaV_gettable(L, rb, RKC(i), ra));
+        continue;
+      }
+      case OP_ADD: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_numadd(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_ADD));
+        continue;
+      }
+      case OP_SUB: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_numsub(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_SUB));
+        continue;
+      }
+      case OP_MUL: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_nummul(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_MUL));
+        continue;
+      }
+      case OP_DIV: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_numdiv(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_DIV));
+        continue;
+      }
+      case OP_MOD: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_nummod(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_MOD));
+        continue;
+      }
+      case OP_POW: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        if (ttisnumber(rb) && ttisnumber(rc)) {
+          lua_Number nb = nvalue(rb), nc = nvalue(rc);
+          setnvalue(ra, luai_numpow(L, nb, nc));
+        }
+        else
+          Protect(Arith(L, ra, rb, rc, TM_POW));
+        continue;
+      }
+      case OP_UNM: {
+        TValue *rb = RB(i);
+        if (ttisnumber(rb)) {
+          lua_Number nb = nvalue(rb);
+          setnvalue(ra, luai_numunm(L, nb));
+        }
+        else {
+          Protect(Arith(L, ra, rb, rb, TM_UNM));
+        }
+        continue;
+      }
+      case OP_NOT: {
+        int res = l_isfalse(RB(i));  /* next assignment may change this value */
+        setbvalue(ra, res);
+        continue;
+      }
+      case OP_LEN: {
+        const TValue *rb = RB(i);
+        switch (ttype(rb)) {
+          case LUA_TTABLE: {
+            setnvalue(ra, cast(lua_Number, luaH_getn(hvalue(rb))));
+            break;
+          }
+          case LUA_TSTRING: {
+            setnvalue(ra, cast(lua_Number, tsvalue(rb)->len));
+            break;
+          }
+          default: {  /* try metamethod */
+            Protect(
+              if (!call_binTM(L, rb, &luaO_nilobject, ra, TM_LEN))
+                luaG_typeerror(L, rb, "get length of");
+            )
+          }
+        }
+        continue;
+      }
+      case OP_CONCAT: {
+        int b = GETARG_B(i);
+        int c = GETARG_C(i);
+        Protect(luaV_concat(L, c-b+1, c); luaC_checkGC(L));
+        setobjs2s(L, RA(i), base+b);
+        continue;
+      }
+      case OP_JMP: {
+        dojump(L, pc, GETARG_sBx(i));
+        continue;
+      }
+      case OP_EQ: {
+        TValue *rb = RKB(i);
+        TValue *rc = RKC(i);
+        Protect(
+          if (equalobj(L, rb, rc) == GETARG_A(i))
+            dojump(L, pc, GETARG_sBx(*pc));
+        )
+        pc++;
+        continue;
+      }
+      case OP_LT: {
+        Protect(
+          if (luaV_lessthan(L, RKB(i), RKC(i)) == GETARG_A(i))
+            dojump(L, pc, GETARG_sBx(*pc));
+        )
+        pc++;
+        continue;
+      }
+      case OP_LE: {
+        Protect(
+          if (lessequal(L, RKB(i), RKC(i)) == GETARG_A(i))
+            dojump(L, pc, GETARG_sBx(*pc));
+        )
+        pc++;
+        continue;
+      }
+      case OP_TEST: {
+        if (l_isfalse(ra) == GETARG_C(i)) pc++;
+        else
+          dojump(L, pc, GETARG_sBx(*pc) + 1);
+        continue;
+      }
+      case OP_TESTSET: {
+        TValue *rb = RB(i);
+        if (l_isfalse(rb) == GETARG_C(i)) pc++;
+        else {
+          setobjs2s(L, ra, rb);
+          dojump(L, pc, GETARG_sBx(*pc) + 1);
+        }
+        continue;
+      }
+      case OP_CALL: {
+        int b = GETARG_B(i);
+        int nresults = GETARG_C(i) - 1;
+        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
+        L->savedpc = pc;
+        switch (luaD_precall(L, ra, nresults)) {
+          case PCRLUA: {
+            nexeccalls++;
+            goto reentry;  /* restart luaV_execute over new Lua function */
+          }
+          case PCRC: {
+            /* it was a C function (`precall' called it); adjust results */
+            if (nresults >= 0) L->top = L->ci->top;
+            base = L->base;
+            continue;
+          }
+          default: {
+            return;  /* yield */
+          }
+        }
+      }
+      case OP_TAILCALL: {
+        int b = GETARG_B(i);
+        if (b != 0) L->top = ra+b;  /* else previous instruction set top */
+        L->savedpc = pc;
+        lua_assert(GETARG_C(i) - 1 == LUA_MULTRET);
+        switch (luaD_precall(L, ra, LUA_MULTRET)) {
+          case PCRLUA: {
+            /* tail call: put new frame in place of previous one */
+            CallInfo *ci = L->ci - 1;  /* previous frame */
+            int aux;
+            StkId func = ci->func;
+            StkId pfunc = (ci+1)->func;  /* previous function index */
+            if (L->openupval) luaF_close(L, ci->base);
+            L->base = ci->base = ci->func + ((ci+1)->base - pfunc);
+            for (aux = 0; pfunc+aux < L->top; aux++)  /* move frame down */
+              setobjs2s(L, func+aux, pfunc+aux);
+            ci->top = L->top = func+aux;  /* correct top */
+            lua_assert(L->top == L->base + clvalue(func)->l.p->maxstacksize);
+            ci->savedpc = L->savedpc;
+            ci->tailcalls++;  /* one more call lost */
+            L->ci--;  /* remove new frame */
+            goto reentry;
+          }
+          case PCRC: {  /* it was a C function (`precall' called it) */
+            base = L->base;
+            continue;
+          }
+          default: {
+            return;  /* yield */
+          }
+        }
+      }
+      case OP_RETURN: {
+        int b = GETARG_B(i);
+        if (b != 0) L->top = ra+b-1;
+        if (L->openupval) luaF_close(L, base);
+        L->savedpc = pc;
+        b = luaD_poscall(L, ra);
+        if (--nexeccalls == 0)  /* was previous function running `here'? */
+          return;  /* no: return */
+        else {  /* yes: continue its execution */
+          if (b) L->top = L->ci->top;
+          lua_assert(isLua(L->ci));
+          lua_assert(GET_OPCODE(*((L->ci)->savedpc - 1)) == OP_CALL);
+          goto reentry;
+        }
+      }
+      case OP_FORLOOP: {
+        lua_Number step = nvalue(ra+2);
+        lua_Number idx = luai_numadd(L, nvalue(ra), step); /* increment index */
+        lua_Number limit = nvalue(ra+1);
+        if (step > 0 ? luai_numle(L, idx, limit) : luai_numle(L, limit, idx)) {
+          dojump(L, pc, GETARG_sBx(i));  /* jump back */
+          setnvalue(ra, idx);  /* update internal index... */
+          setnvalue(ra+3, idx);  /* ...and external index */
+        }
+        continue;
+      }
+      case OP_FORPREP: {
+        const TValue *init = ra;
+        const TValue *plimit = ra+1;
+        const TValue *pstep = ra+2;
+        L->savedpc = pc;  /* next steps may throw errors */
+        if (!tonumber(init, ra))
+          luaG_runerror(L, LUA_QL("for") " initial value must be a number");
+        else if (!tonumber(plimit, ra+1))
+          luaG_runerror(L, LUA_QL("for") " limit must be a number");
+        else if (!tonumber(pstep, ra+2))
+          luaG_runerror(L, LUA_QL("for") " step must be a number");
+        setnvalue(ra, luai_numsub(L, nvalue(ra), nvalue(pstep)));
+        dojump(L, pc, GETARG_sBx(i));
+        continue;
+      }
+      case OP_TFORLOOP: {
+        StkId cb = ra + 3;  /* call base */
+        setobjs2s(L, cb+2, ra+2);
+        setobjs2s(L, cb+1, ra+1);
+        setobjs2s(L, cb, ra);
+        L->top = cb+3;  /* func. + 2 args (state and index) */
+        Protect(luaD_call(L, cb, GETARG_C(i)));
+        L->top = L->ci->top;
+        cb = RA(i) + 3;  /* previous call may change the stack */
+        if (ttisnil(cb))  /* break loop? */
+          pc++;  /* skip jump (break loop) */
+        else {
+          setobjs2s(L, cb-1, cb);  /* save control variable */
+          dojump(L, pc, GETARG_sBx(*pc) + 1);  /* jump back */
+        }
+        continue;
+      }
+      case OP_SETLIST: {
+        int n = GETARG_B(i);
+        int c = GETARG_C(i);
+        int last;
+        Table *h;
+        if (n == 0) {
+          n = cast(int, L->top - ra) - 1;
+          L->top = L->ci->top;
+        }
+        if (c == 0) c = cast(int, *pc++);
+        runtime_check(L, ttistable(ra));
+        h = hvalue(ra);
+        last = ((c-1)*LFIELDS_PER_FLUSH) + n;
+        if (last > h->sizearray)  /* needs more space? */
+          luaH_resizearray(L, h, last);  /* pre-alloc it at once */
+        for (; n > 0; n--) {
+          TValue *val = ra+n;
+          setobj2t(L, luaH_setnum(L, h, last--), val);
+          luaC_barriert(L, h, val);
+        }
+        continue;
+      }
+      case OP_CLOSE: {
+        luaF_close(L, ra);
+        continue;
+      }
+      case OP_CLOSURE: {
+        Proto *p;
+        Closure *ncl;
+        int nup, j;
+        p = cl->p->p[GETARG_Bx(i)];
+        nup = p->nups;
+        ncl = luaF_newLclosure(L, nup, cl->env);
+        ncl->l.p = p;
+        for (j=0; j<nup; j++, pc++) {
+          if (GET_OPCODE(*pc) == OP_GETUPVAL)
+            ncl->l.upvals[j] = cl->upvals[GETARG_B(*pc)];
+          else {
+            lua_assert(GET_OPCODE(*pc) == OP_MOVE);
+            ncl->l.upvals[j] = luaF_findupval(L, base + GETARG_B(*pc));
+          }
+        }
+        setclvalue(L, ra, ncl);
+        Protect(luaC_checkGC(L));
+        continue;
+      }
+      case OP_VARARG: {
+        int b = GETARG_B(i) - 1;
+        int j;
+        CallInfo *ci = L->ci;
+        int n = cast(int, ci->base - ci->func) - cl->p->numparams - 1;
+        if (b == LUA_MULTRET) {
+          Protect(luaD_checkstack(L, n));
+          ra = RA(i);  /* previous call may change the stack */
+          b = n;
+          L->top = ra + n;
+        }
+        for (j = 0; j < b; j++) {
+          if (j < n) {
+            setobjs2s(L, ra + j, ci->base - n + j);
+          }
+          else {
+            setnilvalue(ra + j);
+          }
+        }
+        continue;
+      }
+    }
+  }
+}
+

lvm.h

@@ -0,0 +1,36 @@
+/*
+** $Id: lvm.h,v 2.4 2005/04/25 19:24:10 roberto Exp roberto $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lvm_h
+#define lvm_h
+
+
+#include "ldo.h"
+#include "lobject.h"
+#include "ltm.h"
+
+
+#define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o)))
+
+#define tonumber(o,n)	(ttype(o) == LUA_TNUMBER || \
+                         (((o) = luaV_tonumber(o,n)) != NULL))
+
+#define equalobj(L,o1,o2) \
+	(ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2))
+
+
+LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
+LUAI_FUNC int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2);
+LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n);
+LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj);
+LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key,
+                                            StkId val);
+LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
+                                            StkId val);
+LUAI_FUNC void luaV_execute (lua_State *L, int nexeccalls);
+LUAI_FUNC void luaV_concat (lua_State *L, int total, int last);
+
+#endif

lzio.c

@@ -0,0 +1,82 @@
+/*
+** $Id: lzio.c,v 1.30 2005/05/17 19:49:15 roberto Exp roberto $
+** a generic input stream interface
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#define lzio_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "llimits.h"
+#include "lmem.h"
+#include "lstate.h"
+#include "lzio.h"
+
+
+int luaZ_fill (ZIO *z) {
+  size_t size;
+  lua_State *L = z->L;
+  const char *buff;
+  lua_unlock(L);
+  buff = z->reader(L, z->data, &size);
+  lua_lock(L);
+  if (buff == NULL || size == 0) return EOZ;
+  z->n = size - 1;
+  z->p = buff;
+  return char2int(*(z->p++));
+}
+
+
+int luaZ_lookahead (ZIO *z) {
+  if (z->n == 0) {
+    if (luaZ_fill(z) == EOZ)
+      return EOZ;
+    else {
+      z->n++;  /* luaZ_fill removed first byte; put back it */
+      z->p--;
+    }
+  }
+  return char2int(*z->p);
+}
+
+
+void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
+  z->L = L;
+  z->reader = reader;
+  z->data = data;
+  z->n = 0;
+  z->p = NULL;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+size_t luaZ_read (ZIO *z, void *b, size_t n) {
+  while (n) {
+    size_t m;
+    if (luaZ_lookahead(z) == EOZ)
+      return n;  /* return number of missing bytes */
+    m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */
+    memcpy(b, z->p, m);
+    z->n -= m;
+    z->p += m;
+    b = (char *)b + m;
+    n -= m;
+  }
+  return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
+  if (n > buff->buffsize) {
+    if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
+    luaZ_resizebuffer(L, buff, n);
+  }
+  return buff->buffer;
+}
+
+

lzio.h

@@ -0,0 +1,67 @@
+/*
+** $Id: lzio.h,v 1.20 2005/04/25 19:24:10 roberto Exp roberto $
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lzio_h
+#define lzio_h
+
+#include "lua.h"
+
+#include "lmem.h"
+
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct Zio ZIO;
+
+#define char2int(c)	cast(int, cast(unsigned char, (c)))
+
+#define zgetc(z)  (((z)->n--)>0 ?  char2int(*(z)->p++) : luaZ_fill(z))
+
+typedef struct Mbuffer {
+  char *buffer;
+  size_t n;
+  size_t buffsize;
+} Mbuffer;
+
+#define luaZ_initbuffer(L, buff) ((buff)->buffer = NULL, (buff)->buffsize = 0)
+
+#define luaZ_buffer(buff)	((buff)->buffer)
+#define luaZ_sizebuffer(buff)	((buff)->buffsize)
+#define luaZ_bufflen(buff)	((buff)->n)
+
+#define luaZ_resetbuffer(buff) ((buff)->n = 0)
+
+
+#define luaZ_resizebuffer(L, buff, size) \
+	(luaM_reallocvector(L, (buff)->buffer, (buff)->buffsize, size, char), \
+	(buff)->buffsize = size)
+
+#define luaZ_freebuffer(L, buff)	luaZ_resizebuffer(L, buff, 0)
+
+
+LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
+LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
+                                        void *data);
+LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n);	/* read next n bytes */
+LUAI_FUNC int luaZ_lookahead (ZIO *z);
+
+
+
+/* --------- Private Part ------------------ */
+
+struct Zio {
+  size_t n;			/* bytes still unread */
+  const char *p;		/* current position in buffer */
+  lua_Reader reader;
+  void* data;			/* additional data */
+  lua_State *L;			/* Lua state (for reader) */
+};
+
+
+LUAI_FUNC int luaZ_fill (ZIO *z);
+
+#endif

makefile

@@ -1,53 +1,154 @@
-# $Id: makefile,v 1.5 1994/01/10 19:49:56 roberto Exp celes $
-# Compilation parameters
-CC = gcc
-CFLAGS = -I/usr/5include -Wall -O2
+# makefile for building Lua
+# see INSTALL for installation instructions
+# see ../Makefile and luaconf.h for further customization
 
-AR = ar
-ARFLAGS	= rvl
+# == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
 
-# Aplication modules
-LUAMOD =	\
-	y.tab 	\
-	lex	\
-	opcode	\
-	hash	\
-	table	\
-	inout	\
-	tree
+CWARNS= -pedantic -Waggregate-return -Wcast-align \
+        -Wmissing-prototypes -Wpointer-arith -Wshadow \
+        -Wsign-compare -Wstrict-prototypes -Wundef -Wwrite-strings
+# -Wcast-qual
 
-LIBMOD = 	\
-	iolib	\
-	strlib	\
-	mathlib
+# -DEXTERNMEMCHECK -DHARDSTACKTESTS
+# -g -DLUA_USER_H='"ltests.h"'
+# -fomit-frame-pointer #-pg -malign-double
+TESTS= -g -DLUA_USER_H='"ltests.h"'
 
-LUAOBJS	= $(LUAMOD:%=%.o)
-
-LIBOBJS	= $(LIBMOD:%=%.o)
-
-lua : lua.o lua.a lualib.a
-	$(CC) $(CFLAGS) -o $@ lua.c lua.a lualib.a -lm
-
-lua.a : y.tab.c $(LUAOBJS)
-	$(AR) $(ARFLAGS) $@  $?
-	ranlib lua.a
-
-lualib.a : $(LIBOBJS)
-	$(AR) $(ARFLAGS) $@  $?
-	ranlib $@
-
-.KEEP_STATE:
-
-liblua.so.1.0 : lua.o
-	ld -o liblua.so.1.0 $(LUAOBJS)
-
-%.o	: %.c
-	$(CC) $(CFLAGS) -c -o $@ $<
+LOCAL = $(TESTS) $(CWARNS)
 
 
-y.tab.c : lua.stx exscript
-	yacc -d lua.stx ; ex y.tab.c <exscript
+CC= gcc
+CFLAGS= -O2 -Wall $(MYCFLAGS)
+AR= ar rcu
+RANLIB= ranlib
+RM= rm -f
 
-% : RCS/%,v
-	co $@
+MYCFLAGS= $(LOCAL)
+MYLDFLAGS=
+MYLIBS=
 
+
+# enable Linux goodies
+MYCFLAGS= $(LOCAL) -DLUA_USE_DLOPEN -DLUA_USE_READLINE
+MYLDFLAGS= -Wl,-E
+MYLIBS= -ldl -lreadline -lhistory -lncurses
+
+
+
+# == END OF USER SETTINGS. NO NEED TO CHANGE ANYTHING BELOW THIS LINE =========
+
+
+LIBS = -lm
+
+CORE_T=	liblua.a
+CORE_O=	lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \
+	lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o  \
+	lundump.o lvm.o lzio.o ltests.o
+AUX_O=	lauxlib.o
+LIB_O=	lbaselib.o ldblib.o liolib.o lmathlib.o loslib.o ltablib.o lstrlib.o \
+	loadlib.o linit.o
+
+LUA_T=	lua
+LUA_O=	lua.o
+
+LUAC_T=	luac
+LUAC_O=	luac.o print.o
+
+ALL_T= $(CORE_T) $(LUA_T) $(LUAC_T)
+ALL_O= $(CORE_O) $(LUA_O) $(LUAC_O) $(AUX_O) $(LIB_O)
+ALL_A= $(CORE_T)
+
+all:	$(ALL_T)
+
+o:	$(ALL_O)
+
+a:	$(ALL_A)
+
+$(CORE_T): $(CORE_O) $(AUX_O) $(LIB_O)
+	$(AR) $@ $?
+	$(RANLIB) $@
+
+$(LUA_T): $(LUA_O) $(CORE_T)
+	$(CC) -o $@ $(MYLDFLAGS) $(LUA_O) $(CORE_T) $(LIBS) $(MYLIBS) $(DL)
+
+$(LUAC_T): $(LUAC_O) $(CORE_T)
+	$(CC) -o $@ $(MYLDFLAGS) $(LUAC_O) $(CORE_T) $(LIBS) $(MYLIBS)
+
+clean:
+	$(RM) $(ALL_T) $(ALL_O)
+
+depend:
+	@$(CC) $(CFLAGS) -MM *.c
+
+echo:
+	@echo "CC = $(CC)"
+	@echo "CFLAGS = $(CFLAGS)"
+	@echo "AR = $(AR)"
+	@echo "RANLIB = $(RANLIB)"
+	@echo "RM = $(RM)"
+	@echo "MYCFLAGS = $(MYCFLAGS)"
+	@echo "MYLDFLAGS = $(MYLDFLAGS)"
+	@echo "MYLIBS = $(MYLIBS)"
+	@echo "DL = $(DL)"
+
+# DO NOT DELETE
+
+lapi.o: lapi.c lua.h luaconf.h lapi.h lobject.h llimits.h ldebug.h \
+  lstate.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h \
+  lundump.h lvm.h
+lauxlib.o: lauxlib.c lua.h luaconf.h lauxlib.h
+lbaselib.o: lbaselib.c lua.h luaconf.h lauxlib.h lualib.h
+lcode.o: lcode.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
+  lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h ltm.h \
+  ldo.h lgc.h
+ldblib.o: ldblib.c lua.h luaconf.h lauxlib.h lualib.h
+ldebug.o: ldebug.c lua.h luaconf.h lapi.h lobject.h llimits.h lcode.h \
+  llex.h lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h \
+  ltm.h ldo.h lfunc.h lstring.h lgc.h lvm.h
+ldo.o: ldo.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
+  lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lparser.h ltable.h \
+  lstring.h lundump.h lvm.h
+ldump.o: ldump.c lua.h luaconf.h lobject.h llimits.h lopcodes.h lstate.h \
+  ltm.h lzio.h lmem.h lundump.h
+lfunc.o: lfunc.c lua.h luaconf.h lfunc.h lobject.h llimits.h lgc.h lmem.h \
+  lstate.h ltm.h lzio.h
+lgc.o: lgc.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
+  lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h
+linit.o: linit.c lua.h luaconf.h lualib.h lauxlib.h
+liolib.o: liolib.c lua.h luaconf.h lauxlib.h lualib.h
+llex.o: llex.c lua.h luaconf.h ldo.h lobject.h llimits.h lstate.h ltm.h \
+  lzio.h lmem.h llex.h lparser.h ltable.h lstring.h lgc.h
+lmathlib.o: lmathlib.c lua.h luaconf.h lauxlib.h lualib.h
+lmem.o: lmem.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h
+loadlib.o: loadlib.c lua.h luaconf.h lauxlib.h lualib.h
+lobject.o: lobject.c lua.h luaconf.h ldo.h lobject.h llimits.h lstate.h \
+  ltm.h lzio.h lmem.h lstring.h lgc.h lvm.h
+lopcodes.o: lopcodes.c lua.h luaconf.h lobject.h llimits.h lopcodes.h
+loslib.o: loslib.c lua.h luaconf.h lauxlib.h lualib.h
+lparser.o: lparser.c lua.h luaconf.h lcode.h llex.h lobject.h llimits.h \
+  lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h lstate.h ltm.h \
+  ldo.h lfunc.h lstring.h lgc.h
+lstate.o: lstate.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h llex.h lstring.h ltable.h
+lstring.o: lstring.c lua.h luaconf.h lmem.h llimits.h lobject.h lstate.h \
+  ltm.h lzio.h lstring.h lgc.h
+lstrlib.o: lstrlib.c lua.h luaconf.h lauxlib.h lualib.h
+ltable.o: ltable.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h \
+  ltm.h lzio.h lmem.h ldo.h lgc.h ltable.h
+ltablib.o: ltablib.c lua.h luaconf.h lauxlib.h lualib.h
+ltests.o: ltests.c lua.h luaconf.h lapi.h lobject.h llimits.h lauxlib.h \
+  lcode.h llex.h lzio.h lmem.h lopcodes.h lparser.h ltable.h ldebug.h \
+  lstate.h ltm.h ldo.h lfunc.h lstring.h lgc.h lualib.h
+ltm.o: ltm.c lua.h luaconf.h lobject.h llimits.h lstate.h ltm.h lzio.h \
+  lmem.h lstring.h lgc.h ltable.h
+lua.o: lua.c lua.h luaconf.h lauxlib.h lualib.h
+lundump.o: lundump.c lua.h luaconf.h ldebug.h lstate.h lobject.h \
+  llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lopcodes.h lstring.h lgc.h \
+  lundump.h
+lvm.o: lvm.c lua.h luaconf.h ldebug.h lstate.h lobject.h llimits.h ltm.h \
+  lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h ltable.h lvm.h
+lzio.o: lzio.c lua.h luaconf.h llimits.h lmem.h lstate.h lobject.h ltm.h \
+  lzio.h
+
+# (end of Makefile)

mathlib.c

@@ -1,235 +0,0 @@
-/*
-** mathlib.c
-** Mathematics library to LUA
-*/
-
-char *rcs_mathlib="$Id: $";
-
-#include <stdio.h>		/* NULL */
-#include <math.h>
-
-#include "lua.h"
-
-#define TODEGREE(a) ((a)*180.0/3.14159)
-#define TORAD(a)    ((a)*3.14159/180.0)
-
-static void math_abs (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `abs'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `abs'"); return; }
- d = lua_getnumber(o);
- if (d < 0) d = -d;
- lua_pushnumber (d);
-}
-
-
-static void math_sin (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sin'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sin'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (sin(TORAD(d)));
-}
-
-
-
-static void math_cos (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `cos'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `cos'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (cos(TORAD(d)));
-}
-
-
-
-static void math_tan (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `tan'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `tan'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (tan(TORAD(d)));
-}
-
-
-static void math_asin (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `asin'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `asin'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(asin(d)));
-}
-
-
-static void math_acos (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `acos'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `acos'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(acos(d)));
-}
-
-
-
-static void math_atan (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `atan'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `atan'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(atan(d)));
-}
-
-
-static void math_ceil (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `ceil'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `ceil'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (ceil(d));
-}
-
-
-static void math_floor (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `floor'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `floor'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (floor(d));
-}
-
-static void math_mod (void)
-{
- int d1, d2;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `mod'"); return; }
- d1 = (int) lua_getnumber(o1);
- d2 = (int) lua_getnumber(o2);
- lua_pushnumber (d1%d2);
-}
-
-
-static void math_sqrt (void)
-{
- double d;
- lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sqrt'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sqrt'"); return; }
- d = lua_getnumber(o);
- lua_pushnumber (sqrt(d));
-}
-
-static void math_pow (void)
-{
- double d1, d2;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `pow'"); return; }
- d1 = lua_getnumber(o1);
- d2 = lua_getnumber(o2);
- lua_pushnumber (pow(d1,d2));
-}
-
-static void math_min (void)
-{
- int i=1;
- double d, dmin;
- lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `min'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `min'"); return; }
- dmin = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
- {
-  if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `min'"); return; }
-  d = lua_getnumber (o);
-  if (d < dmin) dmin = d;
- }
- lua_pushnumber (dmin);
-}
-
-
-static void math_max (void)
-{
- int i=1;
- double d, dmax;
- lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `max'"); return; }
- if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `max'"); return; }
- dmax = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
- {
-  if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `max'"); return; }
-  d = lua_getnumber (o);
-  if (d > dmax) dmax = d;
- }
- lua_pushnumber (dmax);
-}
-
-
-
-/*
-** Open math library
-*/
-void mathlib_open (void)
-{
- lua_register ("abs",   math_abs);
- lua_register ("sin",   math_sin);
- lua_register ("cos",   math_cos);
- lua_register ("tan",   math_tan);
- lua_register ("asin",  math_asin);
- lua_register ("acos",  math_acos);
- lua_register ("atan",  math_atan);
- lua_register ("ceil",  math_ceil);
- lua_register ("floor", math_floor);
- lua_register ("mod",   math_mod);
- lua_register ("sqrt",  math_sqrt);
- lua_register ("pow",   math_pow);
- lua_register ("min",   math_min);
- lua_register ("max",   math_max);
-}

mathlib.h

@@ -1,13 +0,0 @@
-/*
-** Math library to LUA
-** TeCGraf - PUC-Rio
-** $Id: $
-*/
-
-
-#ifndef strlib_h
-
-void mathlib_open (void);
-
-#endif
-

mm.h

@@ -1,39 +0,0 @@
-/*
-** mm.h
-** Waldemar Celes Filho
-** Sep 16, 1992
-*/
-
-
-#ifndef mm_h
-#define mm_h
-
-#include <stdlib.h>
-
-#ifdef _MM_
-
-/* switch off the debugger functions */
-#define malloc(s)	MmMalloc(s,__FILE__,__LINE__)
-#define calloc(n,s)	MmCalloc(n,s,__FILE__,__LINE__)
-#define realloc(a,s)	MmRealloc(a,s,__FILE__,__LINE__,#a)
-#define free(a)		MmFree(a,__FILE__,__LINE__,#a)
-#define strdup(s)	MmStrdup(s,__FILE__,__LINE__)
-#endif
-
-typedef void (*Ferror) (char *);
-
-/* Exported functions */
-void  MmInit (Ferror f, Ferror w);
-void *MmMalloc (unsigned size, char *file, int line);
-void *MmCalloc (unsigned n, unsigned size, char *file, int line);
-void  MmFree (void *a, char *file, int line, char *var);
-void *MmRealloc (void *old, unsigned size, char *file, int line, char *var);
-char *MmStrdup (char *s, char *file, int line);
-unsigned MmGetBytes (void);
-void MmListAllocated (void);
-void MmCheck (void);
-void MmStatistics (void);
-
-
-#endif
-

opcode.h

@@ -1,164 +0,0 @@
-/*
-** TeCGraf - PUC-Rio
-** $Id: opcode.h,v 2.1 1994/04/20 22:07:57 celes Exp celes $
-*/
-
-#ifndef opcode_h
-#define opcode_h
-
-#ifndef STACKGAP
-#define STACKGAP	128
-#endif 
-
-#ifndef real
-#define real float
-#endif
-
-#define FIELDS_PER_FLUSH 40
-
-typedef unsigned char  Byte;
-
-typedef unsigned short Word;
-
-typedef signed long  Long;
-
-typedef union
-{
- struct {char c1; char c2;} m;
- Word w;
-} CodeWord;
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- float f;
-} CodeFloat;
-
-typedef enum 
-{ 
- PUSHNIL,
- PUSH0, PUSH1, PUSH2,
- PUSHBYTE,
- PUSHWORD,
- PUSHFLOAT,
- PUSHSTRING,
- PUSHLOCAL0, PUSHLOCAL1, PUSHLOCAL2, PUSHLOCAL3, PUSHLOCAL4,
- PUSHLOCAL5, PUSHLOCAL6, PUSHLOCAL7, PUSHLOCAL8, PUSHLOCAL9,
- PUSHLOCAL,
- PUSHGLOBAL,
- PUSHINDEXED,
- PUSHMARK,
- PUSHOBJECT,
- STORELOCAL0, STORELOCAL1, STORELOCAL2, STORELOCAL3, STORELOCAL4,
- STORELOCAL5, STORELOCAL6, STORELOCAL7, STORELOCAL8, STORELOCAL9,
- STORELOCAL,
- STOREGLOBAL,
- STOREINDEXED0,
- STOREINDEXED,
- STORELIST0,
- STORELIST,
- STORERECORD,
- ADJUST,
- CREATEARRAY,
- EQOP,
- LTOP,
- LEOP,
- ADDOP,
- SUBOP,
- MULTOP,
- DIVOP,
- CONCOP,
- MINUSOP,
- NOTOP,
- ONTJMP,
- ONFJMP,
- JMP,
- UPJMP,
- IFFJMP,
- IFFUPJMP,
- POP,
- CALLFUNC,
- RETCODE,
- HALT,
- SETFUNCTION,
- SETLINE,
- RESET
-} OpCode;
-
-typedef enum
-{
- T_MARK,
- T_NIL,
- T_NUMBER,
- T_STRING,
- T_ARRAY,
- T_FUNCTION,
- T_CFUNCTION,
- T_USERDATA
-} Type; 
-
-typedef void (*Cfunction) (void);
-typedef int  (*Input) (void);
-
-typedef union
-{
- Cfunction 	 f;
- real    	 n;
- char      	*s;
- Byte      	*b;
- struct Hash    *a;
- void           *u;
-} Value;
-
-typedef struct Object
-{
- Type  tag;
- Value value;
-} Object;
-
-typedef struct
-{
- Object  object;
-} Symbol;
-
-/* Macros to access structure members */
-#define tag(o)		((o)->tag)
-#define nvalue(o)	((o)->value.n)
-#define svalue(o)	((o)->value.s)
-#define bvalue(o)	((o)->value.b)
-#define avalue(o)	((o)->value.a)
-#define fvalue(o)	((o)->value.f)
-#define uvalue(o)	((o)->value.u)
-
-/* Macros to access symbol table */
-#define s_object(i)	(lua_table[i].object)
-#define s_tag(i)	(tag(&s_object(i)))
-#define s_nvalue(i)	(nvalue(&s_object(i)))
-#define s_svalue(i)	(svalue(&s_object(i)))
-#define s_bvalue(i)	(bvalue(&s_object(i)))
-#define s_avalue(i)	(avalue(&s_object(i)))
-#define s_fvalue(i)	(fvalue(&s_object(i)))
-#define s_uvalue(i)	(uvalue(&s_object(i)))
-
-#define get_word(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;}
-#define get_float(code,pc)   {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
- 
-
-
-/* Exported functions */
-int     lua_execute   (Byte *pc);
-void    lua_markstack (void);
-char   *lua_strdup (char *l);
-
-void    lua_setinput   (Input fn);	/* from "lex.c" module */
-char   *lua_lasttext   (void);		/* from "lex.c" module */
-int     lua_parse      (void); 		/* from "lua.stx" module */
-void    lua_type       (void);
-void 	lua_obj2number (void);
-void 	lua_print      (void);
-void 	lua_internaldofile (void);
-void 	lua_internaldostring (void);
-void    lua_travstack (void (*fn)(Object *));
-
-#endif

strlib.c

@@ -1,135 +0,0 @@
-/*
-** strlib.c
-** String library to LUA
-*/
-
-char *rcs_strlib="$Id: strlib.c,v 1.1 1993/12/17 18:41:19 celes Exp celes $";
-
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-
-#include "mm.h"
-
-
-#include "lua.h"
-
-/*
-** Return the position of the first caracter of a substring into a string
-** LUA interface:
-**			n = strfind (string, substring)
-*/
-static void str_find (void)
-{
- char *s1, *s2, *f;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- if (!lua_isstring(o1) || !lua_isstring(o2))
- { lua_error ("incorrect arguments to function `strfind'"); return; }
- s1 = lua_getstring(o1);
- s2 = lua_getstring(o2);
- f = strstr(s1,s2);
- if (f != NULL)
-  lua_pushnumber (f-s1+1);
- else
-  lua_pushnil();
-}
-
-/*
-** Return the string length
-** LUA interface:
-**			n = strlen (string)
-*/
-static void str_len (void)
-{
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlen'"); return; }
- lua_pushnumber(strlen(lua_getstring(o)));
-}
-
-
-/*
-** Return the substring of a string, from start to end
-** LUA interface:
-**			substring = strsub (string, start, end)
-*/
-static void str_sub (void)
-{
- int start, end;
- char *s;
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- lua_Object o3 = lua_getparam (3);
- if (!lua_isstring(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `strsub'"); return; }
- if (o3 != NULL && !lua_isnumber(o3))
- { lua_error ("incorrect third argument to function `strsub'"); return; }
- s = lua_copystring(o1);
- start = lua_getnumber (o2);
- end = o3 == NULL ? strlen(s) : lua_getnumber (o3);
- if (end < start || start < 1 || end > strlen(s))
-  lua_pushstring("");
- else
- {
-  s[end] = 0;
-  lua_pushstring (&s[start-1]);
- }
- free (s);
-}
-
-/*
-** Convert a string to lower case.
-** LUA interface:
-**			lowercase = strlower (string)
-*/
-static void str_lower (void)
-{
- char *s, *c;
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
- while (*c != 0)
- {
-  *c = tolower(*c);
-  c++;
- }
- lua_pushstring(s);
- free(s);
-} 
-
-
-/*
-** Convert a string to upper case.
-** LUA interface:
-**			uppercase = strupper (string)
-*/
-static void str_upper (void)
-{
- char *s, *c;
- lua_Object o = lua_getparam (1);
- if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
- while (*c != 0)
- {
-  *c = toupper(*c);
-  c++;
- }
- lua_pushstring(s);
- free(s);
-} 
-
-
-/*
-** Open string library
-*/
-void strlib_open (void)
-{
- lua_register ("strfind", str_find);
- lua_register ("strlen", str_len);
- lua_register ("strsub", str_sub);
- lua_register ("strlower", str_lower);
- lua_register ("strupper", str_upper);
-}

strlib.h

@@ -1,13 +0,0 @@
-/*
-** String library to LUA
-** TeCGraf - PUC-Rio
-** $Id: $
-*/
-
-
-#ifndef strlib_h
-
-void strlib_open (void);
-
-#endif
-

table.c

@@ -1,309 +0,0 @@
-/*
-** table.c
-** Module to control static tables
-*/
-
-char *rcs_table="$Id: table.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "mm.h"
-
-#include "opcode.h"
-#include "tree.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "lua.h"
-
-#define streq(s1,s2)	(s1[0]==s2[0]&&strcmp(s1+1,s2+1)==0)
-
-#define BUFFER_BLOCK 256
-
-Symbol *lua_table;
-static Word lua_ntable = 0;
-static Word lua_maxsymbol = 0;
-
-char **lua_constant;
-static Word lua_nconstant = 0;
-static Word lua_maxconstant = 0;
-
-
-
-#define MAXFILE 	20
-char  		       *lua_file[MAXFILE];
-int      		lua_nfile;
-
-/* Variables to controll garbage collection */
-#define GARBAGE_BLOCK 256
-Word lua_block=GARBAGE_BLOCK; /* when garbage collector will be called */
-Word lua_nentity;   /* counter of new entities (strings and arrays) */
-
-
-/*
-** Initialise symbol table with internal functions
-*/
-static void lua_initsymbol (void)
-{
- int n;
- lua_maxsymbol = BUFFER_BLOCK;
- lua_table = (Symbol *) calloc(lua_maxsymbol, sizeof(Symbol));
- if (lua_table == NULL)
- {
-  lua_error ("symbol table: not enough memory");
-  return;
- }
- n = lua_findsymbol("type"); 
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_type;
- n = lua_findsymbol("tonumber");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_obj2number;
- n = lua_findsymbol("next");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_next;
- n = lua_findsymbol("nextvar");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_nextvar;
- n = lua_findsymbol("print");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_print;
- n = lua_findsymbol("dofile");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_internaldofile;
- n = lua_findsymbol("dostring");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_internaldostring;
-}
-
-
-/*
-** Initialise constant table with pre-defined constants
-*/
-void lua_initconstant (void)
-{
- lua_maxconstant = BUFFER_BLOCK;
- lua_constant = (char **) calloc(lua_maxconstant, sizeof(char *));
- if (lua_constant == NULL)
- {
-  lua_error ("constant table: not enough memory");
-  return;
- }
- lua_findconstant("mark");
- lua_findconstant("nil");
- lua_findconstant("number");
- lua_findconstant("string");
- lua_findconstant("table");
- lua_findconstant("function");
- lua_findconstant("cfunction");
- lua_findconstant("userdata");
-}
-
-/*
-** Given a name, search it at symbol table and return its index. If not
-** found, allocate it.
-** On error, return -1.
-*/
-int lua_findsymbol (char *s)
-{
- char *n; 
- if (lua_table == NULL)
-  lua_initsymbol(); 
- n = lua_varcreate(s);
- if (n == NULL)
- {
-  lua_error ("create symbol: not enough memory");
-  return -1;
- }
- if (indexstring(n) == UNMARKED_STRING)
- {
-  if (lua_ntable == lua_maxsymbol)
-  {
-   lua_maxsymbol *= 2;
-   if (lua_maxsymbol > MAX_WORD)
-   {
-    lua_error("symbol table overflow");
-    return -1;
-   }
-   lua_table = (Symbol *)realloc(lua_table, lua_maxsymbol*sizeof(Symbol));
-   if (lua_table == NULL)
-   {
-    lua_error ("symbol table: not enough memory");
-    return -1;
-   }
-  }
-  indexstring(n) = lua_ntable;
-  s_tag(lua_ntable) = T_NIL;
-  lua_ntable++;
- }
- return indexstring(n);
-}
-
-
-/*
-** Given a name, search it at constant table and return its index. If not
-** found, allocate it.
-** On error, return -1.
-*/
-int lua_findconstant (char *s)
-{
- char *n;
- if (lua_constant == NULL)
-  lua_initconstant();
- n = lua_constcreate(s);
- if (n == NULL)
- {
-  lua_error ("create constant: not enough memory");
-  return -1;
- }
- if (indexstring(n) == UNMARKED_STRING)
- {
-  if (lua_nconstant == lua_maxconstant)
-  {
-   lua_maxconstant *= 2;
-   if (lua_maxconstant > MAX_WORD)
-   {
-    lua_error("constant table overflow");
-    return -1;
-   }
-   lua_constant = (char**)realloc(lua_constant,lua_maxconstant*sizeof(char*));
-   if (lua_constant == NULL)
-   {
-    lua_error ("constant table: not enough memory");
-    return -1;
-   }
-  }
-  indexstring(n) = lua_nconstant;
-  lua_constant[lua_nconstant] = n;
-  lua_nconstant++;
- }
- return indexstring(n);
-}
-
-
-/*
-** Traverse symbol table objects
-*/
-void lua_travsymbol (void (*fn)(Object *))
-{
- int i;
- for (i=0; i<lua_ntable; i++)
-  fn(&s_object(i));
-}
-
-
-/*
-** Mark an object if it is a string or a unmarked array.
-*/
-void lua_markobject (Object *o)
-{
- if (tag(o) == T_STRING && indexstring(svalue(o)) == UNMARKED_STRING)
-  indexstring(svalue(o)) = MARKED_STRING;
- else if (tag(o) == T_ARRAY)
-  lua_hashmark (avalue(o));
-}
-
-
-/*
-** Garbage collection. 
-** Delete all unused strings and arrays.
-*/
-void lua_pack (void)
-{
- /* mark stack strings */
- lua_travstack(lua_markobject);
- 
- /* mark symbol table strings */
- lua_travsymbol(lua_markobject);
-
- lua_strcollector();
- lua_hashcollector();
-
- lua_nentity = 0;      /* reset counter */
-} 
-
-
-/*
-** If the string isn't allocated, allocate a new string at string tree.
-*/
-char *lua_createstring (char *s)
-{
- if (s == NULL) return NULL;
- 
- if (lua_nentity == lua_block)
-  lua_pack ();
- lua_nentity++;
- return lua_strcreate(s);
-}
-
-
-/*
-** Add a file name at file table, checking overflow. This function also set
-** the external variable "lua_filename" with the function filename set.
-** Return 0 on success or 1 on error.
-*/
-int lua_addfile (char *fn)
-{
- if (lua_nfile >= MAXFILE-1)
- {
-  lua_error ("too many files");
-  return 1;
- }
- if ((lua_file[lua_nfile++] = strdup (fn)) == NULL)
- {
-  lua_error ("not enough memory");
-  return 1;
- }
- return 0;
-}
-
-/*
-** Delete a file from file stack
-*/
-int lua_delfile (void)
-{
- lua_nfile--; 
- return 1;
-}
-
-/*
-** Return the last file name set.
-*/
-char *lua_filename (void)
-{
- return lua_file[lua_nfile-1];
-}
-
-/*
-** Internal function: return next global variable
-*/
-void lua_nextvar (void)
-{
- char *varname, *next;
- Object *o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `nextvar'"); return; }
- if (lua_getparam (2) != NULL)
- { lua_error ("too many arguments to function `nextvar'"); return; }
- if (tag(o) == T_NIL)
- {
-  varname = 0;
- }
- else if (tag(o) != T_STRING) 
- { 
-  lua_error ("incorrect argument to function `nextvar'"); 
-  return;
- }
- else
- {
-  varname = svalue(o);
- }
- next = lua_varnext(varname);
- if (next == NULL)
- {
-  lua_pushnil();
-  lua_pushnil();
- }
- else
- {
-  Object name;
-  tag(&name) = T_STRING;
-  svalue(&name) = next;
-  if (lua_pushobject (&name)) return;
-  if (lua_pushobject (&s_object(indexstring(next)))) return;
- }
-}

table.h

@@ -1,32 +0,0 @@
-/*
-** Module to control static tables
-** TeCGraf - PUC-Rio
-** $Id: table.h,v 2.1 1994/04/20 22:07:57 celes Exp celes $
-*/
-
-#ifndef table_h
-#define table_h
-
-extern Symbol *lua_table;
-extern char  **lua_constant;
-
-extern char   *lua_file[];
-extern int     lua_nfile;
-
-extern Word    lua_block;
-extern Word    lua_nentity;
-
-
-void  lua_initconstant (void);
-int   lua_findsymbol      (char *s);
-int   lua_findconstant    (char *s);
-void  lua_travsymbol      (void (*fn)(Object *));
-void  lua_markobject      (Object *o);
-void  lua_pack            (void);
-char *lua_createstring    (char *s);
-int   lua_addfile         (char *fn);
-int   lua_delfile 	  (void);
-char *lua_filename        (void);
-void  lua_nextvar         (void);
-
-#endif

tree.c

@@ -1,210 +0,0 @@
-/*
-** tree.c
-** TecCGraf - PUC-Rio
-*/
- 
-char *rcs_tree="$Id: $";
-
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-#include "tree.h"
-
-
-#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b))) 
-
-
-typedef struct TreeNode
-{
- struct TreeNode *right;
- struct TreeNode *left;
- Word            index;
- char            str[1];        /* \0 byte already reserved */
-} TreeNode;
-
-static TreeNode *string_root = NULL;
-static TreeNode *constant_root = NULL;
-static TreeNode *variable_root = NULL;
-
-/*
-** Insert a new string/constant/variable at the tree. 
-*/
-static char *tree_create (TreeNode **node, char *str)
-{
- if (*node == NULL)
- {
-  *node = (TreeNode *) malloc (sizeof(TreeNode)+strlen(str));
-  if (*node == NULL)
-   lua_error ("memoria insuficiente\n");
-  (*node)->left = (*node)->right = NULL;
-  strcpy((*node)->str, str);
-  (*node)->index = UNMARKED_STRING;
-  return (*node)->str;
- }
- else
- {
-  int c = lua_strcmp(str, (*node)->str);
-  if (c < 0) 
-   return tree_create(&(*node)->left, str);
-  else if (c > 0)
-   return tree_create(&(*node)->right, str);
-  else
-   return (*node)->str;
- }
-}
-
-char *lua_strcreate (char *str) 
-{
- return tree_create(&string_root, str);
-}
-
-char *lua_constcreate (char *str) 
-{
- return tree_create(&constant_root, str);
-}
-
-char *lua_varcreate (char *str) 
-{
- return tree_create(&variable_root, str);
-}
-
-
-
-/*
-** Free a node of the tree
-*/
-static TreeNode *lua_strfree (TreeNode *parent)
-{
- if (parent->left == NULL && parent->right == NULL) /* no child */
- {
-  free (parent);
-  return NULL;
- }
- else if (parent->left == NULL)         /* only right child */
- {
-  TreeNode *p = parent->right;
-  free (parent);
-  return p;
- }
- else if (parent->right == NULL)        /* only left child */
- {
-  TreeNode *p = parent->left;
-  free (parent);
-  return p;
- }
- else                                   /* two children */
- {
-  TreeNode *p = parent, *r = parent->right;
-  while (r->left != NULL)
-  {
-   p = r;
-   r = r->left;
-  }
-  if (p == parent)
-  {
-   r->left  = parent->left;
-   parent->left = NULL;
-   parent->right = r->right;
-   r->right = lua_strfree(parent);
-  }
-  else
-  {
-   TreeNode *t = r->right;
-   r->left  = parent->left;
-   r->right = parent->right;
-   parent->left = NULL;
-   parent->right = t;
-   p->left  = lua_strfree(parent);
-  }
-  return r;
- }
-}
-
-/*
-** Traverse tree for garbage collection
-*/
-static TreeNode *lua_travcollector (TreeNode *r)
-{
- if (r == NULL) return NULL;
- r->right = lua_travcollector(r->right);
- r->left  = lua_travcollector(r->left);
- if (r->index == UNMARKED_STRING) 
-  return lua_strfree(r);
- else
- {
-  r->index = UNMARKED_STRING;
-  return r;
- }
-}
-
-
-/*
-** Garbage collection function.
-** This function traverse the tree freening unindexed strings
-*/
-void lua_strcollector (void)
-{
- string_root = lua_travcollector(string_root);
-}
-
-/*
-** Return next variable.
-*/
-static TreeNode *tree_next (TreeNode *node, char *str)
-{
-#if 0
- if (node == NULL) return NULL;
- if (str == NULL || lua_strcmp(str, node->str) < 0)
- {
-  TreeNode *result = tree_next(node->left, str);
-  return result == NULL ? node : result;
- }
- else
- {
-  return tree_next(node->right, str);
- }
-#else
- if (node == NULL) return NULL;
- else if (str == NULL) return node;
- else
- {
-  int c = lua_strcmp(str, node->str);
-  if (c == 0)
-   return node->left != NULL ? node->left : node->right;
-  else if (c < 0)
-  {
-   TreeNode *result = tree_next(node->left, str);
-   return result != NULL ? result : node->right;
-  }
-  else
-   return tree_next(node->right, str);
- }
-#endif
-}
-
-char *lua_varnext (char *n)
-{
- TreeNode *result = tree_next(variable_root, n);
- return result != NULL ? result->str : NULL;
-}
-
-
-/*
-** Given an id, find the string with exaustive search
-*/
-static char *tree_name (TreeNode *node, Word index)
-{
- if (node == NULL) return NULL;
- if (node->index == index) return node->str;
- else
- {
-  char *result = tree_name(node->left, index);
-  return result != NULL ? result : tree_name(node->right, index);
- }
-}
-char *lua_varname (Word index)
-{
- return tree_name(variable_root, index);
-}

tree.h

@@ -1,27 +0,0 @@
-/*
-** tree.h
-** TecCGraf - PUC-Rio
-** $Id: $
-*/
-
-#ifndef tree_h
-#define tree_h
-
-#include "opcode.h"
-
-
-#define UNMARKED_STRING	0xFFFF
-#define MARKED_STRING   0xFFFE
-#define MAX_WORD        0xFFFD
-
-#define indexstring(s) (*(((Word *)s)-1))
-
-
-char *lua_strcreate    (char *str);
-char *lua_constcreate  (char *str);
-char *lua_varcreate    (char *str);
-void  lua_strcollector (void);
-char *lua_varnext      (char *n);
-char *lua_varname      (Word index);
-
-#endif