new format for numbers in precompiled code (as strings)

the number of returns of a function.

bugs

@@ -0,0 +1,104 @@
+** 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)
+

fallback.c

@@ -1,177 +0,0 @@
-/*
-** fallback.c
-** TecCGraf - PUC-Rio
-*/
- 
-char *rcs_fallback="$Id: fallback.c,v 1.16 1995/10/17 11:52:38 roberto Exp roberto $";
-
-#include <stdio.h>
-#include <string.h>
- 
-#include "mem.h"
-#include "fallback.h"
-#include "opcode.h"
-#include "lua.h"
-
-
-static void errorFB (void);
-static void indexFB (void);
-static void gettableFB (void);
-static void arithFB (void);
-static void concatFB (void);
-static void orderFB (void);
-static void GDFB (void);
-static void funcFB (void);
-
-
-/*
-** Warning: This list must be in the same order as the #define's
-*/
-struct FB  luaI_fallBacks[] = {
-{"error", {LUA_T_CFUNCTION, {errorFB}}, 1, 0},
-{"index", {LUA_T_CFUNCTION, {indexFB}}, 2, 1},
-{"gettable", {LUA_T_CFUNCTION, {gettableFB}}, 2, 1},
-{"arith", {LUA_T_CFUNCTION, {arithFB}}, 3, 1},
-{"order", {LUA_T_CFUNCTION, {orderFB}}, 3, 1},
-{"concat", {LUA_T_CFUNCTION, {concatFB}}, 2, 1},
-{"settable", {LUA_T_CFUNCTION, {gettableFB}}, 3, 0},
-{"gc", {LUA_T_CFUNCTION, {GDFB}}, 1, 0},
-{"function", {LUA_T_CFUNCTION, {funcFB}}, -1, -1}
-                                /* no fixed number of params or results */
-};
-
-#define N_FB  (sizeof(luaI_fallBacks)/sizeof(struct FB))
-
-void luaI_setfallback (void)
-{
-  int i;
-  char *name = lua_getstring(lua_getparam(1));
-  lua_Object func = lua_getparam(2);
-  if (name == NULL || !(lua_isfunction(func) || lua_iscfunction(func)))
-    lua_error("incorrect argument to function `setfallback'");
-  for (i=0; i<N_FB; i++)
-  {
-    if (strcmp(luaI_fallBacks[i].kind, name) == 0)
-    {
-      luaI_pushobject(&luaI_fallBacks[i].function);
-      luaI_fallBacks[i].function = *luaI_Address(func);
-      return;
-    }
-  }
-  /* name not found */
-  lua_error("incorrect argument to function `setfallback'");
-}
-
-
-static void errorFB (void)
-{
-  lua_Object o = lua_getparam(1);
-  if (lua_isstring(o))
-    fprintf (stderr, "lua: %s\n", lua_getstring(o));
-  else
-    fprintf(stderr, "lua: unknown error\n");
-}
- 
-
-static void indexFB (void)
-{
-  lua_pushnil();
-}
- 
-
-static void gettableFB (void)
-{
-  lua_error("indexed expression not a table");
-}
- 
-
-static void arithFB (void)
-{
-  lua_error("unexpected type at conversion to number");
-}
-
-static void concatFB (void)
-{
-  lua_error("unexpected type at conversion to string");
-}
-
-
-static void orderFB (void)
-{
-  lua_error("unexpected type at comparison");
-}
-
-static void GDFB (void) { }
-
-static void funcFB (void)
-{
-  lua_error("call expression not a function");
-}
-
-
-/*
-** Lock routines
-*/
-
-static Object *lockArray = NULL;
-static Word lockSize = 0;
-
-int luaI_lock (Object *object)
-{
-  Word i;
-  Word oldSize;
-  if (tag(object) == LUA_T_NIL)
-    return -1;
-  for (i=0; i<lockSize; i++)
-    if (tag(&lockArray[i]) == LUA_T_NIL)
-    {
-      lockArray[i] = *object;
-      return i;
-    }
-  /* no more empty spaces */
-  oldSize = lockSize;
-  if (lockArray == NULL)
-  {
-    lockSize = 10;
-    lockArray = newvector(lockSize, Object);
-  }
-  else
-  {
-    lockSize = 3*oldSize/2 + 5;
-    lockArray = growvector(lockArray, lockSize, Object);
-  }
-  for (i=oldSize; i<lockSize; i++)
-    tag(&lockArray[i]) = LUA_T_NIL;
-  lockArray[oldSize] = *object;
-  return oldSize;
-}
-
-
-void lua_unlock (int ref)
-{
-  tag(&lockArray[ref]) = LUA_T_NIL;
-}
-
-
-Object *luaI_getlocked (int ref)
-{
-  return &lockArray[ref];
-}
-
-
-void luaI_travlock (int (*fn)(Object *))
-{
-  Word i;
-  for (i=0; i<lockSize; i++)
-    fn(&lockArray[i]);
-}
-
-
-char *luaI_travfallbacks (int (*fn)(Object *))
-{
-  Word i;
-  for (i=0; i<N_FB; i++)
-    if (fn(&luaI_fallBacks[i].function))
-      return luaI_fallBacks[i].kind;
-  return NULL;
-}

fallback.h

@@ -1,34 +0,0 @@
-/*
-** $Id: fallback.h,v 1.9 1995/10/09 13:14:29 roberto Exp roberto $
-*/
- 
-#ifndef fallback_h
-#define fallback_h
-
-#include "opcode.h"
-
-extern struct FB {
-  char *kind;
-  Object function;
-  int nParams;
-  int nResults;
-} luaI_fallBacks[];
-
-#define FB_ERROR  0
-#define FB_INDEX  1
-#define FB_GETTABLE  2
-#define FB_ARITH  3
-#define FB_ORDER  4
-#define FB_CONCAT  5
-#define FB_SETTABLE  6
-#define FB_GC 7
-#define FB_FUNCTION 8
-
-void luaI_setfallback (void);
-int luaI_lock (Object *object);
-Object *luaI_getlocked (int ref);
-void luaI_travlock (int (*fn)(Object *));
-char *luaI_travfallbacks (int (*fn)(Object *));
-
-#endif
-

func.c

@@ -1,79 +0,0 @@
-#include <stdio.h>
-
-#include "luadebug.h"
-#include "table.h"
-#include "mem.h"
-#include "func.h"
-#include "opcode.h"
-
-static TFunc *function_root = NULL;
-
-
-/*
-** Insert function in list for GC
-*/
-void luaI_insertfunction (TFunc *f)
-{
-  lua_pack();
-  f->next = function_root;
-  function_root = f;
-  f->marked = 0;
-}
-
-
-/*
-** Free function
-*/
-static void freefunc (TFunc *f)
-{
-  luaI_free (f->code);
-  luaI_free (f);
-}
-
-/*
-** Garbage collection function.
-** This function traverse the function list freeing unindexed functions
-*/
-Long luaI_funccollector (void)
-{
-  TFunc *curr = function_root;
-  TFunc *prev = NULL;
-  Long counter = 0;
-  while (curr)
-  {
-    TFunc *next = curr->next;
-    if (!curr->marked)
-    {
-      if (prev == NULL)
-        function_root = next;
-      else
-        prev->next = next;
-      freefunc (curr);
-      ++counter;
-    }
-    else
-    {
-      curr->marked = 0;
-      prev = curr;
-    } 
-    curr = next;
-  }
-  return counter;
-}
-
-
-void lua_funcinfo (lua_Object func, char **filename, int *linedefined)
-{
-  Object *f = luaI_Address(func);
-  if (f->tag == LUA_T_MARK || f->tag == LUA_T_FUNCTION)
-  {
-    *filename = f->value.tf->fileName;
-    *linedefined = f->value.tf->lineDefined;
-  }
-  else if (f->tag == LUA_T_CMARK || f->tag == LUA_T_CFUNCTION)
-  {
-    *filename = "(C)";
-    *linedefined = -1;
-  }
-}
-

func.h

@@ -1,24 +0,0 @@
-#ifndef func_h
-#define func_h
-
-#include "types.h"
-#include "lua.h"
-
-/*
-** Header para funcoes.
-*/
-typedef struct TFunc
-{
-  struct TFunc	*next;
-  char		marked;
-  int		size;
-  Byte		*code;
-  int		lineDefined;
-  char		*fileName;
-} TFunc;
-
-Long luaI_funccollector (void);
-void luaI_insertfunction (TFunc *f);
-
-
-#endif

hash.c

@@ -1,335 +0,0 @@
-/*
-** hash.c
-** hash manager for lua
-*/
-
-char *rcs_hash="$Id: hash.c,v 2.25 1995/05/02 18:43:03 roberto Exp $";
-
-#include <string.h>
-
-#include "mem.h"
-#include "opcode.h"
-#include "hash.h"
-#include "table.h"
-#include "lua.h"
-
-#define streq(s1,s2)	(s1 == s2 || (*(s1) == *(s2) && strcmp(s1,s2)==0))
-
-#define nhash(t)	((t)->nhash)
-#define nuse(t)		((t)->nuse)
-#define markarray(t)    ((t)->mark)
-#define nodevector(t)	((t)->node)
-#define node(t,i)	(&(t)->node[i])
-#define ref(n)		(&(n)->ref)
-#define val(n)		(&(n)->val)
-
-
-#define REHASH_LIMIT	0.70	/* avoid more than this % full */
-
-
-static Hash *listhead = NULL;
-
-
-
-/* hash dimensions values */
-static Word dimensions[] = 
- {3, 5, 7, 11, 23, 47, 97, 197, 397, 797, 1597, 3203, 6421,
-  12853, 25717, 51437, 65521, 0};  /* 65521 == last prime < MAX_WORD */
-
-static Word redimension (Word nhash)
-{
- Word i;
- for (i=0; dimensions[i]!=0; i++)
- {
-  if (dimensions[i] > nhash)
-   return dimensions[i];
- }
- lua_error("table overflow");
- return 0;  /* to avoid warnings */
-}
-
-static Word hashindex (Hash *t, Object *ref)		/* hash function */
-{
- switch (tag(ref))
- {
-  case LUA_T_NIL:
-   lua_error ("unexpected type to index table");
-   return -1;  /* UNREACHEABLE */
-  case LUA_T_NUMBER:
-   return (((Word)nvalue(ref))%nhash(t));
-  case LUA_T_STRING:
-  {
-   unsigned long h = tsvalue(ref)->hash;
-   if (h == 0)
-   {
-     char *name = svalue(ref);
-     while (*name)
-       h = ((h<<5)-h)^(unsigned char)*(name++);
-     tsvalue(ref)->hash = h;
-   }
-   return (Word)h%nhash(t);  /* make it a valid index */
-  }
-  case LUA_T_FUNCTION:
-   return (((IntPoint)ref->value.tf)%nhash(t));
-  case LUA_T_CFUNCTION:
-   return (((IntPoint)fvalue(ref))%nhash(t));
-  case LUA_T_ARRAY:
-   return (((IntPoint)avalue(ref))%nhash(t));
-  default:  /* user data */
-   return (((IntPoint)uvalue(ref))%nhash(t));
- }
-}
-
-Bool lua_equalObj (Object *t1, Object *t2)
-{
-  if (tag(t1) != tag(t2)) return 0;
-  switch (tag(t1))
-  {
-    case LUA_T_NIL: return 1;
-    case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
-    case LUA_T_STRING: return streq(svalue(t1), svalue(t2));
-    case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
-    case LUA_T_FUNCTION: return t1->value.tf == t2->value.tf;
-    case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2);
-    default: return uvalue(t1) == uvalue(t2);
-  }
-}
-
-static Word present (Hash *t, Object *ref)
-{ 
- Word h = hashindex(t, ref);
- while (tag(ref(node(t, h))) != LUA_T_NIL)
- {
-  if (lua_equalObj(ref, ref(node(t, h))))
-    return h;
-  h = (h+1) % nhash(t);
- }
- return h;
-}
-
-
-/*
-** Alloc a vector node 
-*/
-static Node *hashnodecreate (Word nhash)
-{
- Word i;
- Node *v = newvector (nhash, Node);
- for (i=0; i<nhash; i++)
-   tag(ref(&v[i])) = LUA_T_NIL;
- return v;
-}
-
-/*
-** Create a new hash. Return the hash pointer or NULL on error.
-*/
-static Hash *hashcreate (Word nhash)
-{
- Hash *t = new(Hash);
- nhash = redimension((Word)((float)nhash/REHASH_LIMIT));
- nodevector(t) = hashnodecreate(nhash);
- nhash(t) = nhash;
- nuse(t) = 0;
- markarray(t) = 0;
- return t;
-}
-
-/*
-** Delete a hash
-*/
-static void hashdelete (Hash *t)
-{
- luaI_free (nodevector(t));
- luaI_free(t);
-}
-
-
-/*
-** Mark a hash and check its elements 
-*/
-void lua_hashmark (Hash *h)
-{
- if (markarray(h) == 0)
- {
-  Word i;
-  markarray(h) = 1;
-  for (i=0; i<nhash(h); i++)
-  {
-   Node *n = node(h,i);
-   if (tag(ref(n)) != LUA_T_NIL)
-   {
-    lua_markobject(&n->ref);
-    lua_markobject(&n->val);
-   }
-  }
- } 
-}
-
-
-static void call_fallbacks (void)
-{
-  Hash *curr_array;
-  Object t;
-  tag(&t) = LUA_T_ARRAY;
-  for (curr_array = listhead; curr_array; curr_array = curr_array->next)
-    if (markarray(curr_array) != 1)
-    {
-      avalue(&t) = curr_array;
-      luaI_gcFB(&t);
-    }
-  tag(&t) = LUA_T_NIL;
-  luaI_gcFB(&t);  /* end of list */
-}
-
- 
-/*
-** Garbage collection to arrays
-** Delete all unmarked arrays.
-*/
-Long lua_hashcollector (void)
-{
- Hash *curr_array = listhead, *prev = NULL;
- Long counter = 0;
- call_fallbacks();
- while (curr_array != NULL)
- {
-  Hash *next = curr_array->next;
-  if (markarray(curr_array) != 1)
-  {
-   if (prev == NULL) listhead = next;
-   else              prev->next = next;
-   hashdelete(curr_array);
-   ++counter;
-  }
-  else
-  {
-   markarray(curr_array) = 0;
-   prev = curr_array;
-  }
-  curr_array = next;
- }
- return counter;
-}
-
-
-/*
-** Create a new array
-** This function inserts the new array in the array list. It also
-** executes garbage collection if the number of arrays created
-** exceed a pre-defined range.
-*/
-Hash *lua_createarray (Word nhash)
-{
- Hash *array;
- lua_pack();
- array = hashcreate(nhash);
- array->next = listhead;
- listhead = array;
- return array;
-}
-
-
-/*
-** Re-hash
-*/
-static void rehash (Hash *t)
-{
- Word i;
- Word   nold = nhash(t);
- Node *vold = nodevector(t);
- nhash(t) = redimension(nhash(t));
- nodevector(t) = hashnodecreate(nhash(t));
- for (i=0; i<nold; i++)
- {
-  Node *n = vold+i;
-  if (tag(ref(n)) != LUA_T_NIL && tag(val(n)) != LUA_T_NIL)
-   *node(t, present(t, ref(n))) = *n;  /* copy old node to new hahs */
- }
- luaI_free(vold);
-}
-
-/*
-** If the hash node is present, return its pointer, otherwise return
-** null.
-*/
-Object *lua_hashget (Hash *t, Object *ref)
-{
- Word h = present(t, ref);
- if (tag(ref(node(t, h))) != LUA_T_NIL) return val(node(t, h));
- else return NULL;
-}
-
-
-/*
-** If the hash node is present, return its pointer, otherwise create a new
-** node for the given reference and also return its pointer.
-*/
-Object *lua_hashdefine (Hash *t, Object *ref)
-{
- Word   h;
- Node *n;
- h = present(t, ref);
- n = node(t, h);
- if (tag(ref(n)) == LUA_T_NIL)
- {
-  nuse(t)++;
-  if ((float)nuse(t) > (float)nhash(t)*REHASH_LIMIT)
-  {
-   rehash(t);
-   h = present(t, ref);
-   n = node(t, h);
-  }
-  *ref(n) = *ref;
-  tag(val(n)) = LUA_T_NIL;
- }
- return (val(n));
-}
-
-
-/*
-** 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 hashnext (Hash *t, Word i)
-{
- if (i >= nhash(t))
- {
-  lua_pushnil(); lua_pushnil();
-  return;
- }
- while (tag(ref(node(t,i))) == LUA_T_NIL || tag(val(node(t,i))) == LUA_T_NIL)
- {
-  if (++i >= nhash(t))
-  {
-   lua_pushnil(); lua_pushnil();
-   return;
-  }
- }
- luaI_pushobject(ref(node(t,i)));
- luaI_pushobject(val(node(t,i)));
-}
-
-void lua_next (void)
-{
- Hash   *t;
- lua_Object o = lua_getparam(1);
- lua_Object r = lua_getparam(2);
- if (o == LUA_NOOBJECT || r == LUA_NOOBJECT)
-   lua_error ("too few arguments to function `next'");
- if (lua_getparam(3) != LUA_NOOBJECT)
-   lua_error ("too many arguments to function `next'");
- if (!lua_istable(o))
-   lua_error ("first argument of function `next' is not a table");
- t = avalue(luaI_Address(o));
- if (lua_isnil(r))
- {
-  hashnext(t, 0);
- }
- else
- {
-  Word h = present (t, luaI_Address(r));
-  hashnext(t, h+1);
- }
-}

hash.h

@@ -1,37 +0,0 @@
-/*
-** hash.h
-** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
-** $Id: hash.h,v 2.7 1994/12/20 21:20:36 roberto Exp roberto $
-*/
-
-#ifndef hash_h
-#define hash_h
-
-#include "types.h"
-
-typedef struct node
-{
- Object ref;
- Object val;
-} Node;
-
-typedef struct Hash
-{
- struct Hash   *next;
- char           mark;
- Word          nhash;
- Word           nuse;
- Node          *node;
-} Hash;
-
-
-Bool     lua_equalObj (Object *t1, Object *t2);
-Hash    *lua_createarray (Word nhash);
-void     lua_hashmark (Hash *h);
-Long     lua_hashcollector (void);
-Object  *lua_hashget (Hash *t, Object *ref);
-Object 	*lua_hashdefine (Hash *t, Object *ref);
-void     lua_next (void);
-
-#endif

inout.c

@@ -1,220 +0,0 @@
-/*
-** inout.c
-** Provide function to realise the input/output function and debugger 
-** facilities.
-** Also provides some predefined lua functions.
-*/
-
-char *rcs_inout="$Id: inout.c,v 2.24 1995/10/23 13:54:11 roberto Exp roberto $";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "mem.h"
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "tree.h"
-#include "lua.h"
-
-
-#ifndef MAXFUNCSTACK
-#define MAXFUNCSTACK 100
-#endif
-
-#define MAXMESSAGE MAXFUNCSTACK*80
-
-
-/* Exported variables */
-Word lua_linenumber;
-Bool lua_debug = 0;
-char *lua_parsedfile;
-
-
-static FILE *fp;
-static char *st;
-
-/*
-** Function to get the next character from the input file
-*/
-static int fileinput (void)
-{
- return fgetc (fp);
-}
-
-/*
-** Function to get the next character from the input string
-*/
-static int stringinput (void)
-{
- return *st++;
-}
-
-/*
-** Function to open a file to be input unit. 
-** Return 0 on success or error message on error.
-*/
-char *lua_openfile (char *fn)
-{
- lua_setinput (fileinput);
- if (fn == NULL)
- {
-   fp = stdin;
-   fn = "(stdin)";
- }
- else
-   fp = fopen (fn, "r");
- if (fp == NULL)
- {
-   static char buff[255];
-   sprintf(buff, "unable to open file `%.200s'", fn);
-   return buff;
- }
- lua_linenumber = 1;
- lua_parsedfile = lua_constcreate(fn)->ts.str;
- return NULL;
-}
-
-/*
-** Function to close an opened file
-*/
-void lua_closefile (void)
-{
- if (fp != NULL && fp != stdin)
- {
-  fclose (fp);
-  fp = NULL;
- }
-}
-
-/*
-** Function to open a string to be input unit
-*/
-void lua_openstring (char *s)
-{
- lua_setinput (stringinput);
- st = s;
- lua_linenumber = 1;
- lua_parsedfile = lua_constcreate("(string)")->ts.str;
-}
-
-/*
-** Function to close an opened string
-*/
-void lua_closestring (void)
-{
-}
-
- 
-/*
-** Internal function: do a string
-*/
-void lua_internaldostring (void)
-{
- lua_Object obj = lua_getparam (1);
- if (lua_isstring(obj) && !lua_dostring(lua_getstring(obj)))
-  lua_pushnumber(1);
- else
-  lua_pushnil();
-}
-
-/*
-** Internal function: do a file
-*/
-void lua_internaldofile (void)
-{
- lua_Object obj = lua_getparam (1);
- if (lua_isstring(obj) && !lua_dofile(lua_getstring(obj)))
-  lua_pushnumber(1);
- else
-  lua_pushnil();
-}
- 
-/*
-** Internal function: print object values
-*/
-void lua_print (void)
-{
- int i=1;
- lua_Object obj;
- while ((obj=lua_getparam (i++)) != LUA_NOOBJECT)
- {
-  if      (lua_isnumber(obj))    printf("%g\n",lua_getnumber(obj));
-  else if (lua_isstring(obj))    printf("%s\n",lua_getstring(obj));
-  else if (lua_isfunction(obj))  printf("function: %p\n",(luaI_Address(obj))->value.tf);
-  else if (lua_iscfunction(obj)) printf("cfunction: %p\n",lua_getcfunction(obj)
-);
-  else if (lua_isuserdata(obj))  printf("userdata: %p\n",lua_getuserdata(obj));
-  else if (lua_istable(obj))     printf("table: %p\n",avalue(luaI_Address(obj)));
-  else if (lua_isnil(obj))       printf("nil\n");
-  else                           printf("invalid value to print\n");
- }
-}
-
-
-/*
-** Internal function: return an object type.
-*/
-void luaI_type (void)
-{
-  lua_Object o = lua_getparam(1);
-  int t;
-  if (o == LUA_NOOBJECT)
-    lua_error("no parameter to function 'type'");
-  t = lua_type(o);
-  switch (t)
-  {
-    case LUA_T_NIL :
-      lua_pushliteral("nil");
-      break;
-    case LUA_T_NUMBER :
-      lua_pushliteral("number");
-      break;
-    case LUA_T_STRING :
-      lua_pushliteral("string");
-      break;
-    case LUA_T_ARRAY :
-      lua_pushliteral("table");
-      break;
-    case LUA_T_FUNCTION :
-    case LUA_T_CFUNCTION :
-      lua_pushliteral("function");
-      break;
-    default :
-      lua_pushliteral("userdata");
-      break;
-  }
-  lua_pushnumber(t);
-}
- 
-/*
-** Internal function: convert an object to a number
-*/
-void lua_obj2number (void)
-{
-  lua_Object o = lua_getparam(1);
-  if (lua_isnumber(o))
-    lua_pushobject(o);
-  else if (lua_isstring(o))
-  {
-    char c;
-    float f;
-    if (sscanf(lua_getstring(o),"%f %c",&f,&c) == 1)
-      lua_pushnumber(f);
-    else
-      lua_pushnil();
-  }
-  else
-    lua_pushnil();
-}
-
-
-void luaI_error (void)
-{
-  char *s = lua_getstring(lua_getparam(1));
-  if (s == NULL) s = "(no message)";
-  lua_error(s);
-}
-

inout.h

@@ -1,29 +0,0 @@
-/*
-** $Id: inout.h,v 1.9 1995/05/16 17:23:58 roberto Exp roberto $
-*/
-
-
-#ifndef inout_h
-#define inout_h
-
-#include "types.h"
-
-
-extern Word lua_linenumber;
-extern Bool lua_debug;
-extern Word lua_debugline;
-extern char *lua_parsedfile;
-
-char *lua_openfile     (char *fn);
-void lua_closefile    (void);
-void lua_openstring   (char *s);
-void lua_closestring  (void);
-
-void    lua_internaldofile (void);
-void    lua_internaldostring (void);
-void    lua_print      (void);
-void    luaI_type       (void);
-void    lua_obj2number (void);
-void	luaI_error     (void);
-
-#endif

iolib.c

@@ -1,622 +0,0 @@
-/*
-** iolib.c
-** Input/output library to LUA
-*/
-
-char *rcs_iolib="$Id: iolib.c,v 1.28 1995/11/10 17:55:48 roberto Exp roberto $";
-
-#include <stdio.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <time.h>
-#include <stdlib.h>
-
-#include "lua.h"
-#include "luadebug.h"
-#include "lualib.h"
-
-static FILE *in=stdin, *out=stdout;
-
-
-#ifdef POPEN
-FILE *popen();
-int pclose();
-#else
-#define popen(x,y) NULL  /* that is, popen always fails */
-#define pclose(x)  (-1)
-#endif
-
-
-static void closeread (void)
-{
-  if (in != stdin)
-  {
-    if (pclose(in) == -1)
-      fclose(in);
-    in = stdin;
-  }
-}
-
-static void closewrite (void)
-{
-  if (out != stdout)
-  {
-    if (pclose(out) == -1)
-      fclose(out);
-    out = stdout;
-  }
-}
-
-/*
-** Open a file to read.
-** LUA interface:
-**			status = readfrom (filename)
-** where:
-**			status = 1 -> success
-**			status = nil -> error
-*/
-static void io_readfrom (void)
-{
- if (lua_getparam (1) == LUA_NOOBJECT)	
- { /* restore standart input */
-  closeread();
-  lua_pushnumber (1);
- }
- else
- {
-   char *s = lua_check_string(1, "readfrom");
-   FILE *fp = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
-   if (fp == NULL)
-    lua_pushnil();
-   else
-   {
-    closeread();
-    in = fp;
-    lua_pushnumber (1);
-   }
- }
-}
-
-
-/*
-** Open a file to write.
-** LUA interface:
-**			status = writeto (filename)
-** where:
-**			status = 1 -> success
-**			status = nil -> error
-*/
-static void io_writeto (void)
-{
- if (lua_getparam (1) == LUA_NOOBJECT)	/* restore standart output */
- {
-  closewrite();
-  lua_pushnumber (1);
- }
- else
- {
-   char *s = lua_check_string(1, "writeto");
-   FILE *fp = (*s == '|') ? popen(s+1,"w") : fopen(s,"w");
-   if (fp == NULL)
-    lua_pushnil();
-   else
-   {
-    closewrite();
-    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 = nil -> error
-*/
-static void io_appendto (void)
-{
- char *s = lua_check_string(1, "appendto");
- struct stat st;
- int r = (stat(s, &st) == -1) ? 1 : 2;
- FILE *fp = fopen (s, "a");
- if (fp == NULL)
-  lua_pushnil();
- else
- {
-  if (out != stdout) fclose (out);
-  out = fp;
-  lua_pushnumber (r);
- }
-}
-
-
-static char getformat (char *f, int *just, int *m, int *n)
-{
-  int t;
-  switch (*f++)
-  {
-    case 's': case 'S':
-      t = 's';
-      break;
-    case 'f': case 'F': case 'g': case 'G': case 'e': case 'E':
-      t = 'f';
-      break;
-    case 'i': case 'I':
-      t = 'i';
-      break;
-    default:
-      t = 0;  /* to avoid compiler warnings */
-      lua_arg_error("read/write (format)");
-  }
-  *just = (*f == '<' || *f == '>' || *f == '|') ? *f++ : '>';
-  if (isdigit(*f))
-  {
-    *m = 0;
-    while (isdigit(*f))
-      *m = *m*10 + (*f++ - '0');
-  }
-  else
-    *m = -1;
-  if (*f == '.')
-  {
-    f++;	/* skip point */
-    *n = 0;
-    while (isdigit(*f))
-      *n = *n*10 + (*f++ - '0');
-  }
-  else
-    *n = -1;
-  return t;
-}
-
-
-static char *add_char (int c)
-{
-  static char *buff = NULL;
-  static int max = 0;
-  static int n = 0;
-  if (n >= max)
-  {
-    if (max == 0)
-    {
-      max = 100;
-      buff = (char *)malloc(max);
-    }
-    else
-    {
-      max *= 2;
-      buff = (char *)realloc(buff, max);
-    }
-    if (buff == NULL)
-      lua_error("memory overflow");
-  }
-  buff[n++] = c;
-  if (c == 0)
-    n = 0;  /* prepare for next string */
-  return buff;
-}
-
-/*
-** 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 int read_until_char (int del)
-{
-  int c;
-  while((c = fgetc(in)) != EOF && c != del)
-    add_char(c);
-  return c;
-}
-
-static int read_until_blank (void)
-{
-  int c;
-  while((c = fgetc(in)) != EOF && !isspace(c))
-    add_char(c);
-  return c;
-}
-
-static void read_m (int m)
-{
-  int c;
-  while (m-- && (c = fgetc(in)) != EOF)
-    add_char(c);
-}
-
-
-static void read_free (void)
-{
-  int c;
-  while (isspace(c=fgetc(in)))
-   ;
-  if (c == EOF)
-  {
-    lua_pushnil();
-    return;
-  }
-  if (c == '\"' || c == '\'')
-  { /* string */
-    c = read_until_char(c);
-    if (c == EOF)
-    {
-      add_char(0);  /* to be ready for next time */
-      lua_pushnil();
-    }
-    else
-      lua_pushstring(add_char(0));
-  }
-  else
-  {
-    double d;
-    char dummy;
-    char *s;
-    add_char(c);
-    read_until_blank();
-    s = add_char(0);
-    if (sscanf(s, "%lf %c", &d, &dummy) == 1)
-      lua_pushnumber(d);
-    else
-     lua_pushstring(s);
-  }
-}
-
-static void io_read (void)
-{
-  lua_Object o = lua_getparam (1);
-  if (o == LUA_NOOBJECT) 	/* free format */
-    read_free();
-  else				/* formatted */
-  {
-    int m, dummy1, dummy2;
-    switch (getformat(lua_check_string(1, "read"), &dummy1, &m, &dummy2))
-    {
-      case 's':
-        if (m < 0)
-          read_until_blank();
-        else
-          read_m(m);
-        lua_pushstring(add_char(0));
-        break;
-
-      case 'i':  /* can read as float, since it makes no difference to Lua */
-      case 'f':
-      {
-        double d;
-        int result;
-        if (m < 0)
-          result = fscanf(in, "%lf", &d);
-        else
-        {
-          read_m(m);
-          result = sscanf(add_char(0), "%lf", &d);
-        }
-        if (result == 1)
-          lua_pushnumber(d);
-        else
-          lua_pushnil();
-        break;
-      }
-    }
-  }
-}
-
-
-/*
-** Read characters until a given one. The delimiter is not read.
-*/
-static void io_readuntil (void)
-{
- int del = *lua_check_string(1, "readuntil");
- int c = read_until_char(del);
- if (c != EOF) ungetc(c,in);
- lua_pushstring(add_char(0));
-}
-
-
-/*
-** 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 int write_fill (int n, int c)
-{
-  while (n--)
-    if (fputc(c, out) == EOF)
-      return 0;
-  return 1;
-}
-
-static int write_string (char *s, int just, int m)
-{
-  int status;
-  int l = strlen(s);
-  int pre;  /* number of blanks before string */
-  if (m < 0) m = l;
-  else if (l > m)
-  {
-    write_fill(m, '*');
-    return 0;
-  }
-  pre = (just == '<') ? 0 : (just == '>') ? m-l : (m-l)/2;
-  status = write_fill(pre, ' ');
-  status = status && fprintf(out, "%s", s) >= 0;
-  status = status && write_fill(m-(l+pre), ' ');
-  return status;
-}
-
-static int write_float (int just, int m, int n)
-{
-  char buffer[100];
-  lua_Object p = lua_getparam(1);
-  float number;
-  if (!lua_isnumber(p)) return 0;
-  number = lua_getnumber(p);
-  if (n >= 0)
-    sprintf(buffer, "%.*f", n, number);
-  else
-    sprintf(buffer, "%g", number);
-  return write_string(buffer, just, m);
-}
-
-
-static int write_int (int just, int m, int n)
-{
-  char buffer[100];
-  lua_Object p = lua_getparam(1);
-  int number;
-  if (!lua_isnumber(p)) return 0;
-  number = (int)lua_getnumber(p);
-  if (n >= 0)
-    sprintf(buffer, "%.*d", n, number);
-  else
-    sprintf(buffer, "%d", number);
-  return write_string(buffer, just, m);
-}
-
-
-static void io_write (void)
-{
-  int status = 0;
-  if (lua_getparam (2) == LUA_NOOBJECT)   /* free format */
-  {
-    lua_Object o1 = lua_getparam(1);
-    if (lua_isnumber(o1))
-      status = fprintf (out, "%g", lua_getnumber(o1)) >= 0;
-    else if (lua_isstring(o1))
-      status = fprintf (out, "%s", lua_getstring(o1)) >= 0;
-  }
-  else					/* formated */
-  {
-    int just, m, n;
-    switch (getformat (lua_check_string(2, "write"), &just, &m, &n))
-    {
-      case 's':
-      {
-        lua_Object p = lua_getparam(1);
-        if (lua_isstring(p))
-          status = write_string(lua_getstring(p), just, m);
-        else
-          status = 0;
-        break;
-      }
-      case 'f':
-        status = write_float(just, m, n);
-        break;
-      case 'i':
-        status = write_int(just, m, n);
-        break;
-    }
-  }
-  if (status)
-    lua_pushnumber(status);
-  else
-    lua_pushnil();
-}
-
-/*
-** Execute a executable program using "system".
-** Return the result of execution.
-*/
-static void io_execute (void)
-{
-  lua_pushnumber(system(lua_check_string(1, "execute")));
-}
-
-/*
-** Remove a file. On error return nil.
-*/
-static void io_remove  (void)
-{
- if (remove(lua_check_string(1, "remove")) == 0)
-   lua_pushnumber (1);
- else
-   lua_pushnil();
-}
-
-
-/*
-** To get a environment variables
-*/
-static void io_getenv (void)
-{
- char *env = getenv(lua_check_string(1, "getenv"));
- if (env == NULL) lua_pushnil();
- else             lua_pushstring(env); 
-}
-
-/*
-** Return time: hour, min, sec
-*/
-static void io_time (void)
-{
- time_t t;
- struct tm *s;
- 
- time(&t);
- s = localtime(&t);
- lua_pushnumber(s->tm_hour);
- lua_pushnumber(s->tm_min);
- lua_pushnumber(s->tm_sec);
-}
- 
-/*
-** Return date: dd, mm, yyyy
-*/
-static void io_date (void)
-{
- time_t t;
- struct tm *s;
- 
- time(&t);
- s = localtime(&t);
- lua_pushnumber(s->tm_mday);
- lua_pushnumber(s->tm_mon+1);
- lua_pushnumber(s->tm_year+1900);
-}
- 
-/*
-** Beep
-*/
-static void io_beep (void)
-{
- printf("\a");
-}
- 
-/*
-** To exit
-*/
-static void io_exit (void)
-{
- lua_Object o = lua_getparam(1);
- if (lua_isstring(o))
-  fprintf(stderr, "%s\n", lua_getstring(o));
- exit(1);
-}
-
-/*
-** To debug a lua program. Start a dialog with the user, interpreting
-   lua commands until an 'cont'.
-*/
-static void io_debug (void)
-{
-  while (1)
-  {
-    char buffer[250];
-    fprintf(stderr, "lua_debug> ");
-    if (gets(buffer) == 0) return;
-    if (strcmp(buffer, "cont") == 0) return;
-    lua_dostring(buffer);
-  }
-}
-
-
-void lua_printstack (FILE *f)
-{
-  int level = 0;
-  lua_Object func;
-  fprintf(f, "Active Stack:\n");
-  while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT)
-  {
-    char *name;
-    int currentline;
-    fprintf(f, "\t");
-    switch (*getobjname(func, &name))
-    {
-      case 'g':
-        fprintf(f, "function %s", name);
-        break;
-      case 'f':
-        fprintf(f, "fallback %s", name);
-        break;
-      default:
-      {
-        char *filename;
-        int linedefined;
-        lua_funcinfo(func, &filename, &linedefined);
-        if (linedefined == 0)
-          fprintf(f, "main of %s", filename);
-        else if (linedefined < 0)
-          fprintf(f, "%s", filename);
-        else
-          fprintf(f, "function (%s:%d)", filename, linedefined);
-      }
-    }
-    if ((currentline = lua_currentline(func)) > 0)
-      fprintf(f, "  at line %d", currentline);
-    fprintf(f, "\n");
-  }
-}
-
-
-static void errorfb (void)
-{
-  lua_Object o = lua_getparam(1);
-  char *s = lua_isstring(o) ? lua_getstring(o) : "(no messsage)";
-  fprintf(stderr, "lua: %s\n", s);
-  lua_printstack(stderr);
-}
-
-
-/*
-** 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 ("readuntil",io_readuntil);
- lua_register ("write",    io_write);
- lua_register ("execute",  io_execute);
- lua_register ("remove",   io_remove);
- lua_register ("getenv",   io_getenv);
- lua_register ("time",     io_time);
- lua_register ("date",     io_date);
- lua_register ("beep",     io_beep);
- lua_register ("exit",     io_exit);
- lua_register ("debug",    io_debug);
- lua_register ("print_stack", errorfb);
- lua_setfallback("error", errorfb);
-}
-

lapi.c

@@ -0,0 +1,693 @@
+/*
+** $Id: lapi.c,v 1.46 1999/06/17 17:04:03 roberto Exp roberto $
+** Lua API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lapi.h"
+#include "lauxlib.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"
+#include "lua.h"
+#include "luadebug.h"
+#include "lvm.h"
+
+
+char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
+                   "$Authors:  " LUA_AUTHORS " $";
+
+
+
+TObject *luaA_Address (lua_Object o) {
+  return (o != LUA_NOOBJECT) ?  Address(o) : NULL;
+}
+
+
+static lua_Type normalized_type (TObject *o)
+{
+  int t = ttype(o);
+  switch (t) {
+    case LUA_T_PMARK:
+      return LUA_T_PROTO;
+    case LUA_T_CMARK:
+      return LUA_T_CPROTO;
+    case LUA_T_CLMARK:
+      return LUA_T_CLOSURE;
+    default:
+      return t;
+  }
+}
+
+
+static void set_normalized (TObject *d, TObject *s)
+{
+  d->value = s->value;
+  d->ttype = normalized_type(s);
+}
+
+
+static TObject *luaA_protovalue (TObject *o)
+{
+  return (normalized_type(o) == LUA_T_CLOSURE) ?  protovalue(o) : o;
+}
+
+
+void luaA_packresults (void)
+{
+  luaV_pack(L->Cstack.lua2C, L->Cstack.num, L->stack.top);
+  incr_top;
+}
+
+
+int luaA_passresults (void) {
+  L->Cstack.base = L->Cstack.lua2C;  /* position of first result */
+  return L->Cstack.num;
+}
+
+
+static void checkCparams (int nParams)
+{
+  if (L->stack.top-L->stack.stack < L->Cstack.base+nParams)
+    lua_error("API error - wrong number of arguments in C2lua stack");
+}
+
+
+static lua_Object put_luaObject (TObject *o) {
+  luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+  L->stack.stack[L->Cstack.base++] = *o;
+  return L->Cstack.base;  /* this is +1 real position (see Ref) */
+}
+
+
+static lua_Object put_luaObjectonTop (void) {
+  luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+  L->stack.stack[L->Cstack.base++] = *(--L->stack.top);
+  return L->Cstack.base;  /* this is +1 real position (see Ref) */
+}
+
+
+static void top2LC (int n) {
+  /* Put the 'n' elements on the top as the Lua2C contents */
+  L->Cstack.base = (L->stack.top-L->stack.stack);  /* new base */
+  L->Cstack.lua2C = L->Cstack.base-n;  /* position of the new results */
+  L->Cstack.num = n;  /* number of results */
+}
+
+
+lua_Object lua_pop (void) {
+  checkCparams(1);
+  return put_luaObjectonTop();
+}
+
+
+/*
+** Get a parameter, returning the object handle or LUA_NOOBJECT on error.
+** 'number' must be 1 to get the first parameter.
+*/
+lua_Object lua_lua2C (int number)
+{
+  if (number <= 0 || number > L->Cstack.num) return LUA_NOOBJECT;
+  /* Ref(L->stack.stack+(L->Cstack.lua2C+number-1)) ==
+     L->stack.stack+(L->Cstack.lua2C+number-1)-L->stack.stack+1 == */
+  return L->Cstack.lua2C+number;
+}
+
+
+int lua_callfunction (lua_Object function)
+{
+  if (function == LUA_NOOBJECT)
+    return 1;
+  else {
+    luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+    set_normalized(L->stack.stack+L->Cstack.base, Address(function));
+    return luaD_protectedrun();
+  }
+}
+
+
+lua_Object lua_gettagmethod (int tag, char *event)
+{
+  return put_luaObject(luaT_gettagmethod(tag, event));
+}
+
+
+lua_Object lua_settagmethod (int tag, char *event)
+{
+  checkCparams(1);
+  luaT_settagmethod(tag, event, L->stack.top-1);
+  return put_luaObjectonTop();
+}
+
+
+lua_Object lua_seterrormethod (void) {
+  lua_Object temp;
+  checkCparams(1);
+  temp = lua_getglobal("_ERRORMESSAGE");
+  lua_setglobal("_ERRORMESSAGE");
+  return temp;
+}
+
+
+lua_Object lua_gettable (void)
+{
+  checkCparams(2);
+  luaV_gettable();
+  return put_luaObjectonTop();
+}
+
+
+lua_Object lua_rawgettable (void) {
+  checkCparams(2);
+  if (ttype(L->stack.top-2) != LUA_T_ARRAY)
+    lua_error("indexed expression not a table in rawgettable");
+  *(L->stack.top-2) = *luaH_get(avalue(L->stack.top-2), L->stack.top-1);
+  --L->stack.top;
+  return put_luaObjectonTop();
+}
+
+
+void lua_settable (void) {
+  checkCparams(3);
+  luaV_settable(L->stack.top-3);
+  L->stack.top -= 2;  /* pop table and index */
+}
+
+
+void lua_rawsettable (void) {
+  checkCparams(3);
+  luaV_rawsettable(L->stack.top-3);
+}
+
+
+lua_Object lua_createtable (void)
+{
+  TObject o;
+  luaC_checkGC();
+  avalue(&o) = luaH_new(0);
+  ttype(&o) = LUA_T_ARRAY;
+  return put_luaObject(&o);
+}
+
+
+lua_Object lua_getglobal (char *name)
+{
+  luaD_checkstack(2);  /* may need that to call T.M. */
+  luaV_getglobal(luaS_new(name));
+  return put_luaObjectonTop();
+}
+
+
+lua_Object lua_rawgetglobal (char *name)
+{
+  TaggedString *ts = luaS_new(name);
+  return put_luaObject(&ts->u.s.globalval);
+}
+
+
+void lua_setglobal (char *name)
+{
+  checkCparams(1);
+  luaD_checkstack(2);  /* may need that to call T.M. */
+  luaV_setglobal(luaS_new(name));
+}
+
+
+void lua_rawsetglobal (char *name)
+{
+  TaggedString *ts = luaS_new(name);
+  checkCparams(1);
+  luaS_rawsetglobal(ts, --L->stack.top);
+}
+
+
+
+int lua_isnil (lua_Object o)
+{
+  return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_NIL);
+}
+
+int lua_istable (lua_Object o)
+{
+  return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_ARRAY);
+}
+
+int lua_isuserdata (lua_Object o)
+{
+  return (o!= LUA_NOOBJECT) && (ttype(Address(o)) == LUA_T_USERDATA);
+}
+
+int lua_iscfunction (lua_Object o)
+{
+  return (lua_tag(o) == LUA_T_CPROTO);
+}
+
+int lua_isnumber (lua_Object o)
+{
+  return (o!= LUA_NOOBJECT) && (tonumber(Address(o)) == 0);
+}
+
+int lua_isstring (lua_Object o)
+{
+  int t = lua_tag(o);
+  return (t == LUA_T_STRING) || (t == LUA_T_NUMBER);
+}
+
+int lua_isfunction (lua_Object o)
+{
+  int t = lua_tag(o);
+  return (t == LUA_T_PROTO) || (t == LUA_T_CPROTO);
+}
+
+
+double lua_getnumber (lua_Object object)
+{
+ if (object == LUA_NOOBJECT) return 0.0;
+ if (tonumber(Address(object))) return 0.0;
+ else return (nvalue(Address(object)));
+}
+
+char *lua_getstring (lua_Object object)
+{
+  luaC_checkGC();  /* "tostring" may create a new string */
+  if (object == LUA_NOOBJECT || tostring(Address(object)))
+    return NULL;
+  else return (svalue(Address(object)));
+}
+
+long lua_strlen (lua_Object object)
+{
+  luaC_checkGC();  /* "tostring" may create a new string */
+  if (object == LUA_NOOBJECT || tostring(Address(object)))
+    return 0L;
+  else return (tsvalue(Address(object))->u.s.len);
+}
+
+void *lua_getuserdata (lua_Object object)
+{
+  if (object == LUA_NOOBJECT || ttype(Address(object)) != LUA_T_USERDATA)
+    return NULL;
+  else return tsvalue(Address(object))->u.d.v;
+}
+
+lua_CFunction lua_getcfunction (lua_Object object)
+{
+  if (!lua_iscfunction(object))
+    return NULL;
+  else return fvalue(luaA_protovalue(Address(object)));
+}
+
+
+void lua_pushnil (void)
+{
+  ttype(L->stack.top) = LUA_T_NIL;
+  incr_top;
+}
+
+void lua_pushnumber (double n)
+{
+  ttype(L->stack.top) = LUA_T_NUMBER;
+  nvalue(L->stack.top) = n;
+  incr_top;
+}
+
+void lua_pushlstring (char *s, long len)
+{
+  tsvalue(L->stack.top) = luaS_newlstr(s, len);
+  ttype(L->stack.top) = LUA_T_STRING;
+  incr_top;
+  luaC_checkGC();
+}
+
+void lua_pushstring (char *s)
+{
+  if (s == NULL)
+    lua_pushnil();
+  else
+    lua_pushlstring(s, strlen(s));
+}
+
+void lua_pushcclosure (lua_CFunction fn, int n)
+{
+  if (fn == NULL)
+    lua_error("API error - attempt to push a NULL Cfunction");
+  checkCparams(n);
+  ttype(L->stack.top) = LUA_T_CPROTO;
+  fvalue(L->stack.top) = fn;
+  incr_top;
+  luaV_closure(n);
+  luaC_checkGC();
+}
+
+void lua_pushusertag (void *u, int tag)
+{
+  if (tag < 0 && tag != LUA_ANYTAG)
+    luaT_realtag(tag);  /* error if tag is not valid */
+  tsvalue(L->stack.top) = luaS_createudata(u, tag);
+  ttype(L->stack.top) = LUA_T_USERDATA;
+  incr_top;
+  luaC_checkGC();
+}
+
+void luaA_pushobject (TObject *o)
+{
+  *L->stack.top = *o;
+  incr_top;
+}
+
+void lua_pushobject (lua_Object o) {
+  if (o == LUA_NOOBJECT)
+    lua_error("API error - attempt to push a NOOBJECT");
+  set_normalized(L->stack.top, Address(o));
+  incr_top;
+}
+
+
+int lua_tag (lua_Object lo)
+{
+  if (lo == LUA_NOOBJECT)
+     return LUA_T_NIL;
+  else {
+    TObject *o = Address(lo);
+    int t;
+    switch (t = ttype(o)) {
+      case LUA_T_USERDATA:
+        return o->value.ts->u.d.tag;
+      case LUA_T_ARRAY:
+        return o->value.a->htag;
+      case LUA_T_PMARK:
+        return LUA_T_PROTO;
+      case LUA_T_CMARK:
+        return LUA_T_CPROTO;
+      case LUA_T_CLOSURE: case LUA_T_CLMARK:
+        return o->value.cl->consts[0].ttype;
+#ifdef DEBUG
+      case LUA_T_LINE:
+        LUA_INTERNALERROR("invalid type");
+#endif
+      default:
+        return t;
+    }
+  }
+}
+
+
+void lua_settag (int tag)
+{
+  checkCparams(1);
+  luaT_realtag(tag);
+  switch (ttype(L->stack.top-1)) {
+    case LUA_T_ARRAY:
+      (L->stack.top-1)->value.a->htag = tag;
+      break;
+    case LUA_T_USERDATA:
+      (L->stack.top-1)->value.ts->u.d.tag = tag;
+      break;
+    default:
+      luaL_verror("cannot change the tag of a %.20s",
+                  luaO_typename(L->stack.top-1));
+  }
+  L->stack.top--;
+}
+
+
+TaggedString *luaA_nextvar (TaggedString *g) {
+  if (g == NULL)
+    g = (TaggedString *)L->rootglobal.next;  /* first variable */
+  else {
+    /* check whether name is in global var list */
+    luaL_arg_check((GCnode *)g != g->head.next, 1, "variable name expected");
+    g = (TaggedString *)g->head.next;  /* get next */
+  }
+  while (g && g->u.s.globalval.ttype == LUA_T_NIL)  /* skip globals with nil */
+    g = (TaggedString *)g->head.next;
+  if (g) {
+    ttype(L->stack.top) = LUA_T_STRING; tsvalue(L->stack.top) = g;
+    incr_top;
+    luaA_pushobject(&g->u.s.globalval);
+  }
+  return g;
+}
+
+
+char *lua_nextvar (char *varname) {
+  TaggedString *g = (varname == NULL) ? NULL : luaS_new(varname);
+  g = luaA_nextvar(g);
+  if (g) {
+    top2LC(2);
+    return g->str;
+  }
+  else {
+    top2LC(0);
+    return NULL;
+  }
+}
+
+
+int luaA_next (Hash *t, int i) {
+  int tsize = nhash(t);
+  for (; i<tsize; i++) {
+    Node *n = node(t, i);
+    if (ttype(val(n)) != LUA_T_NIL) {
+      luaA_pushobject(ref(n));
+      luaA_pushobject(val(n));
+      return i+1;  /* index to be used next time */
+    }
+  }
+  return 0;  /* no more elements */
+}
+
+
+int lua_next (lua_Object o, int i) {
+  TObject *t = Address(o);
+  if (ttype(t) != LUA_T_ARRAY)
+    lua_error("API error - object is not a table in `lua_next'"); 
+  i = luaA_next(avalue(t), i);
+  top2LC((i==0) ? 0 : 2);
+  return i;
+}
+
+
+
+/*
+** {======================================================
+** To manipulate some state information
+** =======================================================
+*/
+
+lua_State *lua_setstate (lua_State *st) {
+  lua_State *old = lua_state;
+  lua_state = st;
+  return old;
+}
+
+lua_LHFunction lua_setlinehook (lua_LHFunction func) {
+  lua_LHFunction old = L->linehook;
+  L->linehook = func;
+  return old;
+}
+
+lua_CHFunction lua_setcallhook (lua_CHFunction func) {
+  lua_CHFunction old = L->callhook;
+  L->callhook = func;
+  return old;
+}
+
+int lua_setdebug (int debug) {
+  int old = L->debug;
+  L->debug = debug;
+  return old;
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** Debug interface
+** =======================================================
+*/
+
+
+lua_Function lua_stackedfunction (int level)
+{
+  StkId i;
+  for (i = (L->stack.top-1)-L->stack.stack; i>=0; i--) {
+    int t = L->stack.stack[i].ttype;
+    if (t == LUA_T_CLMARK || t == LUA_T_PMARK || t == LUA_T_CMARK)
+      if (level-- == 0)
+        return Ref(L->stack.stack+i);
+  }
+  return LUA_NOOBJECT;
+}
+
+
+int lua_nups (lua_Function func) {
+  TObject *o = luaA_Address(func);
+  return (!o || normalized_type(o) != LUA_T_CLOSURE) ? 0 : o->value.cl->nelems;
+}
+
+
+int lua_currentline (lua_Function func)
+{
+  TObject *f = Address(func);
+  return (f+1 < L->stack.top && (f+1)->ttype == LUA_T_LINE) ?
+             (f+1)->value.i : -1;
+}
+
+
+lua_Object lua_getlocal (lua_Function func, int local_number, char **name) {
+  /* check whether func is a Lua function */
+  if (lua_tag(func) != LUA_T_PROTO)
+    return LUA_NOOBJECT;
+  else {
+    TObject *f = Address(func);
+    TProtoFunc *fp = luaA_protovalue(f)->value.tf;
+    *name = luaF_getlocalname(fp, local_number, lua_currentline(func));
+    if (*name) {
+      /* if "*name", there must be a LUA_T_LINE */
+      /* therefore, f+2 points to function base */
+      return put_luaObject((f+2)+(local_number-1));
+    }
+    else
+      return LUA_NOOBJECT;
+  }
+}
+
+
+int lua_setlocal (lua_Function func, int local_number)
+{
+  /* check whether func is a Lua function */
+  if (lua_tag(func) != LUA_T_PROTO)
+    return 0;
+  else {
+    TObject *f = Address(func);
+    TProtoFunc *fp = luaA_protovalue(f)->value.tf;
+    char *name = luaF_getlocalname(fp, local_number, lua_currentline(func));
+    checkCparams(1);
+    --L->stack.top;
+    if (name) {
+      /* if "name", there must be a LUA_T_LINE */
+      /* therefore, f+2 points to function base */
+      *((f+2)+(local_number-1)) = *L->stack.top;
+      return 1;
+    }
+    else
+      return 0;
+  }
+}
+
+
+void lua_funcinfo (lua_Object func, char **source, int *linedefined) {
+  if (!lua_isfunction(func))
+    lua_error("API error - `funcinfo' called with a non-function value");
+  else {
+    TObject *f = luaA_protovalue(Address(func));
+    if (normalized_type(f) == LUA_T_PROTO) {
+      *source = tfvalue(f)->source->str;
+      *linedefined = tfvalue(f)->lineDefined;
+    }
+    else {
+      *source = "(C)";
+      *linedefined = -1;
+    }
+  }
+}
+
+
+static int checkfunc (TObject *o)
+{
+  return luaO_equalObj(o, L->stack.top);
+}
+
+
+char *lua_getobjname (lua_Object o, char **name)
+{ /* try to find a name for given function */
+  set_normalized(L->stack.top, Address(o)); /* to be accessed by "checkfunc" */
+  if ((*name = luaS_travsymbol(checkfunc)) != NULL)
+    return "global";
+  else if ((*name = luaT_travtagmethods(checkfunc)) != NULL)
+    return "tag-method";
+  else return "";
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** BLOCK mechanism
+** =======================================================
+*/
+
+
+#ifndef	MAX_C_BLOCKS
+#define MAX_C_BLOCKS	1000  /* arbitrary limit */
+#endif
+
+
+void lua_beginblock (void) {
+  luaM_growvector(L->Cblocks, L->numCblocks, 1, struct C_Lua_Stack,
+                  "too many nested blocks", MAX_C_BLOCKS);
+  L->Cblocks[L->numCblocks] = L->Cstack;
+  L->numCblocks++;
+}
+
+void lua_endblock (void) {
+  --L->numCblocks;
+  L->Cstack = L->Cblocks[L->numCblocks];
+  luaD_adjusttop(L->Cstack.base);
+}
+
+
+
+int lua_ref (int lock) {
+  int ref;
+  checkCparams(1);
+  ref = luaC_ref(L->stack.top-1, lock);
+  L->stack.top--;
+  return ref;
+}
+
+
+
+lua_Object lua_getref (int ref) {
+  TObject *o = luaC_getref(ref);
+  return (o ? put_luaObject(o) : LUA_NOOBJECT);
+}
+
+/* }====================================================== */
+
+
+
+#ifdef LUA_COMPAT2_5
+/*
+** API: set a function as a fallback
+*/
+
+static void do_unprotectedrun (lua_CFunction f, int nParams, int nResults) {
+  luaD_openstack(nParams);
+  (L->stack.top-nParams)->ttype = LUA_T_CPROTO;
+  (L->stack.top-nParams)->value.f = f;
+  luaD_calln(nParams, nResults);
+}
+
+
+lua_Object lua_setfallback (char *name, lua_CFunction fallback) {
+  lua_pushstring(name);
+  lua_pushcfunction(fallback);
+  do_unprotectedrun(luaT_setfallback, 2, 1);
+  return put_luaObjectonTop();
+}
+#endif
+

lapi.h

@@ -0,0 +1,22 @@
+/*
+** $Id: lapi.h,v 1.3 1999/02/22 19:13:12 roberto Exp roberto $
+** Auxiliary functions from Lua API
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lapi_h
+#define lapi_h
+
+
+#include "lua.h"
+#include "lobject.h"
+
+
+TObject *luaA_Address (lua_Object o);
+void luaA_pushobject (TObject *o);
+void luaA_packresults (void);
+int luaA_passresults (void);
+TaggedString *luaA_nextvar (TaggedString *g);
+int luaA_next (Hash *t, int i);
+
+#endif

lauxlib.c

@@ -0,0 +1,133 @@
+/*
+** $Id: lauxlib.c,v 1.16 1999/03/10 14:19:41 roberto Exp roberto $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Please Notice: This file uses only the official API of Lua
+** Any function declared here could be written as an application function.
+** With care, these functions can be used by other libraries.
+*/
+
+#include "lauxlib.h"
+#include "lua.h"
+#include "luadebug.h"
+
+
+
+int luaL_findstring (char *name, char *list[]) {
+  int i;
+  for (i=0; list[i]; i++)
+    if (strcmp(list[i], name) == 0)
+      return i;
+  return -1;  /* name not found */
+}
+
+void luaL_argerror (int numarg, char *extramsg) {
+  lua_Function f = lua_stackedfunction(0);
+  char *funcname;
+  lua_getobjname(f, &funcname);
+  numarg -= lua_nups(f);
+  if (funcname == NULL)
+    funcname = "?";
+  if (extramsg == NULL)
+    luaL_verror("bad argument #%d to function `%.50s'", numarg, funcname);
+  else
+    luaL_verror("bad argument #%d to function `%.50s' (%.100s)",
+                    numarg, funcname, extramsg);
+}
+
+char *luaL_check_lstr (int numArg, long *len)
+{
+  lua_Object o = lua_getparam(numArg);
+  luaL_arg_check(lua_isstring(o), numArg, "string expected");
+  if (len) *len = lua_strlen(o);
+  return lua_getstring(o);
+}
+
+char *luaL_opt_lstr (int numArg, char *def, long *len)
+{
+  return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
+                              luaL_check_lstr(numArg, len);
+}
+
+double luaL_check_number (int numArg)
+{
+  lua_Object o = lua_getparam(numArg);
+  luaL_arg_check(lua_isnumber(o), numArg, "number expected");
+  return lua_getnumber(o);
+}
+
+
+double luaL_opt_number (int numArg, double def)
+{
+  return (lua_getparam(numArg) == LUA_NOOBJECT) ? def :
+                              luaL_check_number(numArg);
+}  
+
+
+lua_Object luaL_tablearg (int arg)
+{
+  lua_Object o = lua_getparam(arg);
+  luaL_arg_check(lua_istable(o), arg, "table expected");
+  return o;
+}
+
+lua_Object luaL_functionarg (int arg)
+{
+  lua_Object o = lua_getparam(arg);
+  luaL_arg_check(lua_isfunction(o), arg, "function expected");
+  return o;
+}
+
+lua_Object luaL_nonnullarg (int numArg)
+{
+  lua_Object o = lua_getparam(numArg);
+  luaL_arg_check(o != LUA_NOOBJECT, numArg, "value expected");
+  return o;
+}
+
+void luaL_openlib (struct luaL_reg *l, int n)
+{
+  int i;
+  lua_open();  /* make sure lua is already open */
+  for (i=0; i<n; i++)
+    lua_register(l[i].name, l[i].func);
+}
+
+
+void luaL_verror (char *fmt, ...)
+{
+  char buff[500];
+  va_list argp;
+  va_start(argp, fmt);
+  vsprintf(buff, fmt, argp);
+  va_end(argp);
+  lua_error(buff);
+}
+
+
+void luaL_chunkid (char *out, char *source, int len) {
+  len -= 13;  /* 13 = strlen("string ''...\0") */
+  if (*source == '@')
+    sprintf(out, "file `%.*s'", len, source+1);
+  else if (*source == '(')
+    strcpy(out, "(C code)");
+  else {
+    char *b = strchr(source , '\n');  /* stop string at first new line */
+    int lim = (b && (b-source)<len) ? b-source : len;
+    sprintf(out, "string `%.*s'", lim, source);
+    strcpy(out+lim+(13-5), "...'");  /* 5 = strlen("...'\0") */
+  }
+}
+
+
+void luaL_filesource (char *out, char *filename, int len) {
+  if (filename == NULL) filename = "(stdin)";
+  sprintf(out, "@%.*s", len-2, filename);  /* -2 for '@' and '\0' */
+}

lauxlib.h

@@ -0,0 +1,53 @@
+/*
+** $Id: lauxlib.h,v 1.11 1999/03/04 21:17:26 roberto Exp roberto $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef auxlib_h
+#define auxlib_h
+
+
+#include "lua.h"
+
+
+struct luaL_reg {
+  char *name;
+  lua_CFunction func;
+};
+
+
+#define luaL_arg_check(cond,numarg,extramsg) if (!(cond)) \
+                                               luaL_argerror(numarg,extramsg)
+
+void luaL_openlib (struct luaL_reg *l, int n);
+void luaL_argerror (int numarg, char *extramsg);
+#define luaL_check_string(n)  (luaL_check_lstr((n), NULL))
+char *luaL_check_lstr (int numArg, long *len);
+#define luaL_opt_string(n, d) (luaL_opt_lstr((n), (d), NULL))
+char *luaL_opt_lstr (int numArg, char *def, long *len);
+double luaL_check_number (int numArg);
+#define luaL_check_int(n)	((int)luaL_check_number(n))
+#define luaL_check_long(n)	((long)luaL_check_number(n))
+double luaL_opt_number (int numArg, double def);
+#define luaL_opt_int(n,d)	((int)luaL_opt_number(n,d))
+#define luaL_opt_long(n,d)	((long)luaL_opt_number(n,d))
+lua_Object luaL_functionarg (int arg);
+lua_Object luaL_tablearg (int arg);
+lua_Object luaL_nonnullarg (int numArg);
+void luaL_verror (char *fmt, ...);
+char *luaL_openspace (int size);
+void luaL_resetbuffer (void);
+void luaL_addchar (int c);
+int luaL_getsize (void);
+void luaL_addsize (int n);
+int luaL_newbuffer (int size);
+void luaL_oldbuffer (int old);
+char *luaL_buffer (void);
+int luaL_findstring (char *name, char *list[]);
+void luaL_chunkid (char *out, char *source, int len);
+void luaL_filesource (char *out, char *filename, int len);
+
+
+#endif

lbuffer.c

@@ -0,0 +1,75 @@
+/*
+** $Id: lbuffer.c,v 1.8 1999/02/25 19:20:40 roberto Exp roberto $
+** Auxiliary functions for building Lua libraries
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdio.h>
+
+#include "lauxlib.h"
+#include "lmem.h"
+#include "lstate.h"
+
+
+/*-------------------------------------------------------
+**  Auxiliary buffer
+-------------------------------------------------------*/
+
+
+#define EXTRABUFF	32
+
+
+#define openspace(size)  if (L->Mbuffnext+(size) > L->Mbuffsize) Openspace(size)
+
+static void Openspace (int size) {
+  lua_State *l = L;  /* to optimize */
+  size += EXTRABUFF;
+  l->Mbuffsize = l->Mbuffnext+size;
+  luaM_growvector(l->Mbuffer, l->Mbuffnext, size, char, arrEM, MAX_INT);
+}
+
+
+char *luaL_openspace (int size) {
+  openspace(size);
+  return L->Mbuffer+L->Mbuffnext;
+}
+
+
+void luaL_addchar (int c) {
+  openspace(1);
+  L->Mbuffer[L->Mbuffnext++] = (char)c;
+}
+
+
+void luaL_resetbuffer (void) {
+  L->Mbuffnext = L->Mbuffbase;
+}
+
+
+void luaL_addsize (int n) {
+  L->Mbuffnext += n;
+}
+
+int luaL_getsize (void) {
+  return L->Mbuffnext-L->Mbuffbase;
+}
+
+int luaL_newbuffer (int size) {
+  int old = L->Mbuffbase;
+  openspace(size);
+  L->Mbuffbase = L->Mbuffnext;
+  return old;
+}
+
+
+void luaL_oldbuffer (int old) {
+  L->Mbuffnext = L->Mbuffbase;
+  L->Mbuffbase = old;
+}
+
+
+char *luaL_buffer (void) {
+  return L->Mbuffer+L->Mbuffbase;
+}
+

lbuiltin.c

@@ -0,0 +1,736 @@
+/*
+** $Id: lbuiltin.c,v 1.58 1999/05/27 20:21:03 roberto Exp roberto $
+** Built-in functions
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lapi.h"
+#include "lauxlib.h"
+#include "lbuiltin.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "lua.h"
+#include "lundump.h"
+#include "lvm.h"
+
+
+
+/*
+** {======================================================
+** Auxiliary functions
+** =======================================================
+*/
+
+
+static void pushtagstring (TaggedString *s) {
+  TObject o;
+  o.ttype = LUA_T_STRING;
+  o.value.ts = s;
+  luaA_pushobject(&o);
+}
+
+
+static real getsize (Hash *h) {
+  real max = 0;
+  int i;
+  for (i = 0; i<nhash(h); i++) {
+    Node *n = h->node+i;
+    if (ttype(ref(n)) == LUA_T_NUMBER && 
+        ttype(val(n)) != LUA_T_NIL &&
+        nvalue(ref(n)) > max)
+      max = nvalue(ref(n));
+  }
+  return max;
+}
+
+
+static real getnarg (Hash *a) {
+  TObject index;
+  TObject *value;
+  /* value = table.n */
+  ttype(&index) = LUA_T_STRING;
+  tsvalue(&index) = luaS_new("n");
+  value = luaH_get(a, &index);
+  return (ttype(value) == LUA_T_NUMBER) ? nvalue(value) : getsize(a);
+}
+
+
+static Hash *gethash (int arg) {
+  return avalue(luaA_Address(luaL_tablearg(arg)));
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** Functions that use only the official API
+** =======================================================
+*/
+
+
+/*
+** If your system does not support "stderr", redefine this function, or
+** redefine _ERRORMESSAGE so that it won't need _ALERT.
+*/
+static void luaB_alert (void) {
+  fputs(luaL_check_string(1), stderr);
+}
+
+
+/*
+** Standard implementation of _ERRORMESSAGE.
+** The library "iolib" redefines _ERRORMESSAGE for better error information.
+*/
+static void error_message (void) {
+  lua_Object al = lua_rawgetglobal("_ALERT");
+  if (lua_isfunction(al)) {  /* avoid error loop if _ALERT is not defined */
+    char buff[600];
+    sprintf(buff, "lua error: %.500s\n", luaL_check_string(1));
+    lua_pushstring(buff);
+    lua_callfunction(al);
+  }
+}
+
+
+/*
+** If your system does not support "stdout", 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).
+*/
+#ifndef MAXPRINT
+#define MAXPRINT	40  /* arbitrary limit */
+#endif
+
+static void luaB_print (void) {
+  lua_Object args[MAXPRINT];
+  lua_Object obj;
+  int n = 0;
+  int i;
+  while ((obj = lua_getparam(n+1)) != LUA_NOOBJECT) {
+    luaL_arg_check(n < MAXPRINT, n+1, "too many arguments");
+    args[n++] = obj;
+  }
+  for (i=0; i<n; i++) {
+    lua_pushobject(args[i]);
+    if (lua_call("tostring"))
+      lua_error("error in `tostring' called by `print'");
+    obj = lua_getresult(1);
+    if (!lua_isstring(obj))
+      lua_error("`tostring' must return a string to `print'");
+    if (i>0) fputs("\t", stdout);
+    fputs(lua_getstring(obj), stdout);
+  }
+  fputs("\n", stdout);
+}
+
+
+static void luaB_tonumber (void) {
+  int base = luaL_opt_int(2, 10);
+  if (base == 10) {  /* standard conversion */
+    lua_Object o = lua_getparam(1);
+    if (lua_isnumber(o)) lua_pushnumber(lua_getnumber(o));
+    else lua_pushnil();  /* not a number */
+  }
+  else {
+    char *s = luaL_check_string(1);
+    long n;
+    luaL_arg_check(0 <= base && base <= 36, 2, "base out of range");
+    n = strtol(s, &s, base);
+    while (isspace((unsigned char)*s)) s++;  /* skip trailing spaces */
+    if (*s) lua_pushnil();  /* invalid format: return nil */
+    else lua_pushnumber(n);
+  }
+}
+
+
+static void luaB_error (void) {
+  lua_error(lua_getstring(lua_getparam(1)));
+}
+
+static void luaB_setglobal (void) {
+  char *n = luaL_check_string(1);
+  lua_Object value = luaL_nonnullarg(2);
+  lua_pushobject(value);
+  lua_setglobal(n);
+  lua_pushobject(value);  /* return given value */
+}
+
+static void luaB_rawsetglobal (void) {
+  char *n = luaL_check_string(1);
+  lua_Object value = luaL_nonnullarg(2);
+  lua_pushobject(value);
+  lua_rawsetglobal(n);
+  lua_pushobject(value);  /* return given value */
+}
+
+static void luaB_getglobal (void) {
+  lua_pushobject(lua_getglobal(luaL_check_string(1)));
+}
+
+static void luaB_rawgetglobal (void) {
+  lua_pushobject(lua_rawgetglobal(luaL_check_string(1)));
+}
+
+static void luaB_luatag (void) {
+  lua_pushnumber(lua_tag(lua_getparam(1)));
+}
+
+static void luaB_settag (void) {
+  lua_Object o = luaL_tablearg(1);
+  lua_pushobject(o);
+  lua_settag(luaL_check_int(2));
+  lua_pushobject(o);  /* return first argument */
+}
+
+static void luaB_newtag (void) {
+  lua_pushnumber(lua_newtag());
+}
+
+static void luaB_copytagmethods (void) {
+  lua_pushnumber(lua_copytagmethods(luaL_check_int(1),
+                                    luaL_check_int(2)));
+}
+
+static void luaB_rawgettable (void) {
+  lua_pushobject(luaL_nonnullarg(1));
+  lua_pushobject(luaL_nonnullarg(2));
+  lua_pushobject(lua_rawgettable());
+}
+
+static void luaB_rawsettable (void) {
+  lua_pushobject(luaL_nonnullarg(1));
+  lua_pushobject(luaL_nonnullarg(2));
+  lua_pushobject(luaL_nonnullarg(3));
+  lua_rawsettable();
+}
+
+static void luaB_settagmethod (void) {
+  lua_Object nf = luaL_nonnullarg(3);
+  lua_pushobject(nf);
+  lua_pushobject(lua_settagmethod(luaL_check_int(1), luaL_check_string(2)));
+}
+
+static void luaB_gettagmethod (void) {
+  lua_pushobject(lua_gettagmethod(luaL_check_int(1), luaL_check_string(2)));
+}
+
+static void luaB_seterrormethod (void) {
+  lua_Object nf = luaL_functionarg(1);
+  lua_pushobject(nf);
+  lua_pushobject(lua_seterrormethod());
+}
+
+static void luaB_collectgarbage (void) {
+  lua_pushnumber(lua_collectgarbage(luaL_opt_int(1, 0)));
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** Functions that could use only the official API but
+** do not, for efficiency.
+** =======================================================
+*/
+
+static void luaB_dostring (void) {
+  long l;
+  char *s = luaL_check_lstr(1, &l);
+  if (*s == ID_CHUNK)
+    lua_error("`dostring' cannot run pre-compiled code");
+  if (lua_dobuffer(s, l, luaL_opt_string(2, s)) == 0)
+    if (luaA_passresults() == 0)
+      lua_pushuserdata(NULL);  /* at least one result to signal no errors */
+}
+
+
+static void luaB_dofile (void) {
+  char *fname = luaL_opt_string(1, NULL);
+  if (lua_dofile(fname) == 0)
+    if (luaA_passresults() == 0)
+      lua_pushuserdata(NULL);  /* at least one result to signal no errors */
+}
+
+
+static void luaB_call (void) {
+  lua_Object f = luaL_nonnullarg(1);
+  Hash *arg = gethash(2);
+  char *options = luaL_opt_string(3, "");
+  lua_Object err = lua_getparam(4);
+  int narg = (int)getnarg(arg);
+  int i, status;
+  if (err != LUA_NOOBJECT) {  /* set new error method */
+    lua_pushobject(err);
+    err = lua_seterrormethod();
+  }
+  /* push arg[1...n] */
+  luaD_checkstack(narg);
+  for (i=0; i<narg; i++)
+    *(L->stack.top++) = *luaH_getint(arg, i+1);
+  status = lua_callfunction(f);
+  if (err != LUA_NOOBJECT) {  /* restore old error method */
+    lua_pushobject(err);
+    lua_seterrormethod();
+  }
+  if (status != 0) {  /* error in call? */
+    if (strchr(options, 'x')) {
+      lua_pushnil();
+      return;  /* return nil to signal the error */
+    }
+    else
+      lua_error(NULL);
+  }
+  else {  /* no errors */
+    if (strchr(options, 'p'))
+      luaA_packresults();
+    else
+      luaA_passresults();
+  }
+}
+
+
+static void luaB_nextvar (void) {
+  TObject *o = luaA_Address(luaL_nonnullarg(1));
+  TaggedString *g;
+  if (ttype(o) == LUA_T_NIL)
+    g = NULL;
+  else {
+    luaL_arg_check(ttype(o) == LUA_T_STRING, 1, "variable name expected");
+    g = tsvalue(o);
+  }
+  if (!luaA_nextvar(g))
+    lua_pushnil();
+}
+
+
+static void luaB_next (void) {
+  Hash *a = gethash(1);
+  TObject *k = luaA_Address(luaL_nonnullarg(2));
+  int i = (ttype(k) == LUA_T_NIL) ? 0 : luaH_pos(a, k)+1;
+  if (luaA_next(a, i) == 0)
+    lua_pushnil();
+}
+
+
+static void luaB_tostring (void) {
+  lua_Object obj = lua_getparam(1);
+  TObject *o = luaA_Address(obj);
+  char buff[64];
+  switch (ttype(o)) {
+    case LUA_T_NUMBER:
+      lua_pushstring(lua_getstring(obj));
+      return;
+    case LUA_T_STRING:
+      lua_pushobject(obj);
+      return;
+    case LUA_T_ARRAY:
+      sprintf(buff, "table: %p", (void *)o->value.a);
+      break;
+    case LUA_T_CLOSURE:
+      sprintf(buff, "function: %p", (void *)o->value.cl);
+      break;
+    case LUA_T_PROTO:
+      sprintf(buff, "function: %p", (void *)o->value.tf);
+      break;
+    case LUA_T_CPROTO:
+      sprintf(buff, "function: %p", (void *)o->value.f);
+      break;
+    case LUA_T_USERDATA:
+      sprintf(buff, "userdata: %p", o->value.ts->u.d.v);
+      break;
+    case LUA_T_NIL:
+      lua_pushstring("nil");
+      return;
+    default:
+      LUA_INTERNALERROR("invalid type");
+  }
+  lua_pushstring(buff);
+}
+
+
+static void luaB_type (void) {
+  lua_Object o = luaL_nonnullarg(1);
+  lua_pushstring(luaO_typename(luaA_Address(o)));
+  lua_pushnumber(lua_tag(o));
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** "Extra" functions
+** These functions can be written in Lua, so you can
+**  delete them if you need a tiny Lua implementation.
+** If you delete them, remove their entries in array
+** "builtin_funcs".
+** =======================================================
+*/
+
+static void luaB_assert (void) {
+  lua_Object p = lua_getparam(1);
+  if (p == LUA_NOOBJECT || lua_isnil(p))
+    luaL_verror("assertion failed!  %.100s", luaL_opt_string(2, ""));
+}
+
+
+static void luaB_foreachi (void) {
+  Hash *t = gethash(1);
+  int i;
+  int n = (int)getnarg(t);
+  TObject f;
+  /* 'f' cannot be a pointer to TObject, because it is on the stack, and the
+     stack may be reallocated by the call. Moreover, some C compilers do not
+     initialize structs, so we must do the assignment after the declaration */
+  f = *luaA_Address(luaL_functionarg(2));
+  luaD_checkstack(3);  /* for f, ref, and val */
+  for (i=1; i<=n; i++) {
+    *(L->stack.top++) = f;
+    ttype(L->stack.top) = LUA_T_NUMBER; nvalue(L->stack.top++) = i;
+    *(L->stack.top++) = *luaH_getint(t, i);
+    luaD_calln(2, 1);
+    if (ttype(L->stack.top-1) != LUA_T_NIL)
+      return;
+    L->stack.top--;
+  }
+}
+
+
+static void luaB_foreach (void) {
+  Hash *a = gethash(1);
+  int i;
+  TObject f;  /* see comment in 'foreachi' */
+  f = *luaA_Address(luaL_functionarg(2));
+  luaD_checkstack(3);  /* for f, ref, and val */
+  for (i=0; i<a->nhash; i++) {
+    Node *nd = &(a->node[i]);
+    if (ttype(val(nd)) != LUA_T_NIL) {
+      *(L->stack.top++) = f;
+      *(L->stack.top++) = *ref(nd);
+      *(L->stack.top++) = *val(nd);
+      luaD_calln(2, 1);
+      if (ttype(L->stack.top-1) != LUA_T_NIL)
+        return;
+      L->stack.top--;  /* remove result */
+    }
+  }
+}
+
+
+static void luaB_foreachvar (void) {
+  GCnode *g;
+  TObject f;  /* see comment in 'foreachi' */
+  f = *luaA_Address(luaL_functionarg(1));
+  luaD_checkstack(4);  /* for extra var name, f, var name, and globalval */
+  for (g = L->rootglobal.next; g; g = g->next) {
+    TaggedString *s = (TaggedString *)g;
+    if (s->u.s.globalval.ttype != LUA_T_NIL) {
+      pushtagstring(s);  /* keep (extra) s on stack to avoid GC */
+      *(L->stack.top++) = f;
+      pushtagstring(s);
+      *(L->stack.top++) = s->u.s.globalval;
+      luaD_calln(2, 1);
+      if (ttype(L->stack.top-1) != LUA_T_NIL) {
+        L->stack.top--;
+        *(L->stack.top-1) = *L->stack.top;  /* remove extra s */
+        return;
+      }
+      L->stack.top-=2;  /* remove result and extra s */
+    }
+  }
+}
+
+
+static void luaB_getn (void) {
+  lua_pushnumber(getnarg(gethash(1)));
+}
+
+
+static void luaB_tinsert (void) {
+  Hash *a = gethash(1);
+  lua_Object v = lua_getparam(3);
+  int n = (int)getnarg(a);
+  int pos;
+  if (v != LUA_NOOBJECT)
+    pos = luaL_check_int(2);
+  else {  /* called with only 2 arguments */
+    v = luaL_nonnullarg(2);
+    pos = n+1;
+  }
+  luaV_setn(a, n+1);  /* a.n = n+1 */
+  for ( ;n>=pos; n--)
+    luaH_move(a, n, n+1);  /* a[n+1] = a[n] */
+  luaH_setint(a, pos, luaA_Address(v));  /* a[pos] = v */
+}
+
+
+static void luaB_tremove (void) {
+  Hash *a = gethash(1);
+  int n = (int)getnarg(a);
+  int pos = luaL_opt_int(2, n);
+  if (n <= 0) return;  /* table is "empty" */
+  luaA_pushobject(luaH_getint(a, pos));  /* result = a[pos] */
+  for ( ;pos<n; pos++)
+    luaH_move(a, pos+1, pos);  /* a[pos] = a[pos+1] */
+  luaV_setn(a, n-1);  /* a.n = n-1 */
+  luaH_setint(a, n, &luaO_nilobject);  /* a[n] = nil */
+}
+
+
+/* {
+** Quicksort
+*/
+
+static void swap (Hash *a, int i, int j) {
+  TObject temp;
+  temp = *luaH_getint(a, i);
+  luaH_move(a, j, i);
+  luaH_setint(a, j, &temp);
+}
+
+static int sort_comp (lua_Object f, TObject *a, TObject *b) {
+  /* notice: the caller (auxsort) must check stack space */
+  if (f != LUA_NOOBJECT) {
+    *(L->stack.top) = *luaA_Address(f);
+    *(L->stack.top+1) = *a;
+    *(L->stack.top+2) = *b;
+    L->stack.top += 3;
+    luaD_calln(2, 1);
+  }
+  else {  /* a < b? */
+    *(L->stack.top) = *a;
+    *(L->stack.top+1) = *b;
+    L->stack.top += 2;
+    luaV_comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, IM_LT);
+  }
+  return ttype(--(L->stack.top)) != LUA_T_NIL;
+}
+
+static void auxsort (Hash *a, int l, int u, lua_Object f) {
+  while (l < u) {  /* for tail recursion */
+    TObject *P;
+    int i, j;
+    /* sort elements a[l], a[(l+u)/2] and a[u] */
+    if (sort_comp(f, luaH_getint(a, u), luaH_getint(a, l)))  /* a[l]>a[u]? */
+      swap(a, l, u);
+    if (u-l == 1) break;  /* only 2 elements */
+    i = (l+u)/2;
+    P = luaH_getint(a, i);
+    if (sort_comp(f, P, luaH_getint(a, l)))  /* a[l]>a[i]? */
+      swap(a, l, i);
+    else if (sort_comp(f, luaH_getint(a, u), P))  /* a[i]>a[u]? */
+      swap(a, i, u);
+    if (u-l == 2) break;  /* only 3 elements */
+    P = L->stack.top++;
+    *P = *luaH_getint(a, i);  /* save pivot on stack (for GC) */
+    swap(a, i, u-1);  /* put median element as pivot (a[u-1]) */
+    /* a[l] <= P == a[u-1] <= a[u], only needs to sort from l+1 to u-2 */
+    i = l; j = u-1;
+    for  (;;) {
+      /* invariant: a[l..i] <= P <= a[j..u] */
+      while (sort_comp(f, luaH_getint(a, ++i), P))  /* stop when a[i] >= P */
+        if (i>u) lua_error("invalid order function for sorting");
+      while (sort_comp(f, P, luaH_getint(a, --j)))  /* stop when a[j] <= P */
+        if (j<l) lua_error("invalid order function for sorting");
+      if (j<i) break;
+      swap(a, i, j);
+    }
+    swap(a, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    L->stack.top--;  /* remove pivot from stack */
+    /* 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(a, j, i, f);  /* call recursively the smaller one */
+  }  /* repeat the routine for the larger one */
+}
+
+static void luaB_sort (void) {
+  lua_Object t = lua_getparam(1);
+  Hash *a = gethash(1);
+  int n = (int)getnarg(a);
+  lua_Object func = lua_getparam(2);
+  luaL_arg_check(func == LUA_NOOBJECT || lua_isfunction(func), 2,
+                 "function expected");
+  luaD_checkstack(4);  /* for Pivot, f, a, b (sort_comp) */
+  auxsort(a, 1, n, func);
+  lua_pushobject(t);
+}
+
+/* }}===================================================== */
+
+
+/*
+** ====================================================== */
+
+
+
+#ifdef DEBUG
+/*
+** {======================================================
+** some DEBUG functions
+** =======================================================
+*/
+
+static void mem_query (void) {
+  lua_pushnumber(totalmem);
+  lua_pushnumber(numblocks);
+}
+
+
+static void query_strings (void) {
+  lua_pushnumber(L->string_root[luaL_check_int(1)].nuse);
+}
+
+
+static void countlist (void) {
+  char *s = luaL_check_string(1);
+  GCnode *l = (s[0]=='t') ? L->roottable.next : (s[0]=='c') ? L->rootcl.next :
+              (s[0]=='p') ? L->rootproto.next : L->rootglobal.next;
+  int i=0;
+  while (l) {
+    i++;
+    l = l->next;
+  }
+  lua_pushnumber(i);
+}
+
+
+static void testC (void) {
+#define getnum(s)	((*s++) - '0')
+#define getname(s)	(nome[0] = *s++, nome)
+
+  static int locks[10];
+  lua_Object reg[10];
+  char nome[2];
+  char *s = luaL_check_string(1);
+  nome[1] = 0;
+  for (;;) {
+    switch (*s++) {
+      case '0': case '1': case '2': case '3': case '4':
+      case '5': case '6': case '7': case '8': case '9':
+        lua_pushnumber(*(s-1) - '0');
+        break;
+
+      case 'c': reg[getnum(s)] = lua_createtable(); break;
+      case 'C': { lua_CFunction f = lua_getcfunction(lua_getglobal(getname(s)));
+                  lua_pushcclosure(f, getnum(s));
+                  break;
+                }
+      case 'P': reg[getnum(s)] = lua_pop(); break;
+      case 'g': { int n=getnum(s); reg[n]=lua_getglobal(getname(s)); break; }
+      case 'G': { int n = getnum(s);
+                  reg[n] = lua_rawgetglobal(getname(s));
+                  break;
+                }
+      case 'l': locks[getnum(s)] = lua_ref(1); break;
+      case 'L': locks[getnum(s)] = lua_ref(0); break;
+      case 'r': { int n=getnum(s); reg[n]=lua_getref(locks[getnum(s)]); break; }
+      case 'u': lua_unref(locks[getnum(s)]); break;
+      case 'p': { int n = getnum(s); reg[n] = lua_getparam(getnum(s)); break; }
+      case '=': lua_setglobal(getname(s)); break;
+      case 's': lua_pushstring(getname(s)); break;
+      case 'o': lua_pushobject(reg[getnum(s)]); break;
+      case 'f': lua_call(getname(s)); break;
+      case 'i': reg[getnum(s)] = lua_gettable(); break;
+      case 'I': reg[getnum(s)] = lua_rawgettable(); break;
+      case 't': lua_settable(); break;
+      case 'T': lua_rawsettable(); break;
+      case 'N' : lua_pushstring(lua_nextvar(lua_getstring(reg[getnum(s)])));
+                 break;
+      case 'n' : { int n=getnum(s);
+                   n=lua_next(reg[n], (int)lua_getnumber(reg[getnum(s)]));
+                   lua_pushnumber(n); break;
+                 }
+      default: luaL_verror("unknown command in `testC': %c", *(s-1));
+    }
+  if (*s == 0) return;
+  if (*s++ != ' ') lua_error("missing ` ' between commands in `testC'");
+  }
+}
+
+/* }====================================================== */
+#endif
+
+
+
+static struct luaL_reg builtin_funcs[] = {
+#ifdef LUA_COMPAT2_5
+  {"setfallback", luaT_setfallback},
+#endif
+#ifdef DEBUG
+  {"testC", testC},
+  {"totalmem", mem_query},
+  {"count", countlist},
+  {"querystr", query_strings},
+#endif
+  {"_ALERT", luaB_alert},
+  {"_ERRORMESSAGE", error_message},
+  {"call", luaB_call},
+  {"collectgarbage", luaB_collectgarbage},
+  {"copytagmethods", luaB_copytagmethods},
+  {"dofile", luaB_dofile},
+  {"dostring", luaB_dostring},
+  {"error", luaB_error},
+  {"getglobal", luaB_getglobal},
+  {"gettagmethod", luaB_gettagmethod},
+  {"newtag", luaB_newtag},
+  {"next", luaB_next},
+  {"nextvar", luaB_nextvar},
+  {"print", luaB_print},
+  {"rawgetglobal", luaB_rawgetglobal},
+  {"rawgettable", luaB_rawgettable},
+  {"rawsetglobal", luaB_rawsetglobal},
+  {"rawsettable", luaB_rawsettable},
+  {"seterrormethod", luaB_seterrormethod},
+  {"setglobal", luaB_setglobal},
+  {"settag", luaB_settag},
+  {"settagmethod", luaB_settagmethod},
+  {"tag", luaB_luatag},
+  {"tonumber", luaB_tonumber},
+  {"tostring", luaB_tostring},
+  {"type", luaB_type},
+  /* "Extra" functions */
+  {"assert", luaB_assert},
+  {"foreach", luaB_foreach},
+  {"foreachi", luaB_foreachi},
+  {"foreachvar", luaB_foreachvar},
+  {"getn", luaB_getn},
+  {"sort", luaB_sort},
+  {"tinsert", luaB_tinsert},
+  {"tremove", luaB_tremove}
+};
+
+
+#define INTFUNCSIZE (sizeof(builtin_funcs)/sizeof(builtin_funcs[0]))
+
+
+void luaB_predefine (void) {
+  /* pre-register mem error messages, to avoid loop when error arises */
+  luaS_newfixedstring(tableEM);
+  luaS_newfixedstring(memEM);
+  luaL_openlib(builtin_funcs, (sizeof(builtin_funcs)/sizeof(builtin_funcs[0])));
+  lua_pushstring(LUA_VERSION);
+  lua_setglobal("_VERSION");
+}
+

lbuiltin.h

@@ -0,0 +1,14 @@
+/*
+** $Id: $
+** Built-in functions
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lbuiltin_h
+#define lbuiltin_h
+
+
+void luaB_predefine (void);
+
+
+#endif

ldblib.c

@@ -0,0 +1,217 @@
+/*
+** $Id: ldblib.c,v 1.4 1999/02/04 17:47:59 roberto Exp roberto $
+** Interface from Lua to its debug API
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "lua.h"
+#include "luadebug.h"
+#include "lualib.h"
+
+
+
+static void settabss (lua_Object t, char *i, char *v) {
+  lua_pushobject(t);
+  lua_pushstring(i);
+  lua_pushstring(v);
+  lua_settable();
+}
+
+
+static void settabsi (lua_Object t, char *i, int v) {
+  lua_pushobject(t);
+  lua_pushstring(i);
+  lua_pushnumber(v);
+  lua_settable();
+}
+
+
+static lua_Object getfuncinfo (lua_Object func) {
+  lua_Object result = lua_createtable();
+  char *str;
+  int line;
+  lua_funcinfo(func, &str, &line);
+  if (line == -1)  /* C function? */
+    settabss(result, "kind", "C");
+  else if (line == 0) {  /* "main"? */
+      settabss(result, "kind", "chunk");
+      settabss(result, "source", str);
+    }
+  else {  /* Lua function */
+    settabss(result, "kind", "Lua");
+    settabsi(result, "def_line", line);
+    settabss(result, "source", str);
+  }
+  if (line != 0) {  /* is it not a "main"? */
+    char *kind = lua_getobjname(func, &str);
+    if (*kind) {
+      settabss(result, "name", str);
+      settabss(result, "where", kind);
+    }
+  }
+  return result;
+}
+
+
+static void getstack (void) {
+  lua_Object func = lua_stackedfunction(luaL_check_int(1));
+  if (func == LUA_NOOBJECT)  /* level out of range? */
+    return;
+  else {
+    lua_Object result = getfuncinfo(func);
+    int currline = lua_currentline(func);
+    if (currline > 0)
+      settabsi(result, "current", currline);
+    lua_pushobject(result);
+    lua_pushstring("func");
+    lua_pushobject(func);
+    lua_settable();  /* result.func = func */
+    lua_pushobject(result);
+  }
+}
+
+
+static void funcinfo (void) {
+  lua_pushobject(getfuncinfo(luaL_functionarg(1)));
+}
+
+
+static int findlocal (lua_Object func, int arg) {
+  lua_Object v = lua_getparam(arg);
+  if (lua_isnumber(v))
+    return (int)lua_getnumber(v);
+  else {
+    char *name = luaL_check_string(arg);
+    int i = 0;
+    int result = -1;
+    char *vname;
+    while (lua_getlocal(func, ++i, &vname) != LUA_NOOBJECT) {
+      if (strcmp(name, vname) == 0)
+        result = i;  /* keep looping to get the last var with this name */
+    }
+    if (result == -1)
+      luaL_verror("no local variable `%.50s' at given level", name);
+    return result;
+  }
+}
+
+
+static void getlocal (void) {
+  lua_Object func = lua_stackedfunction(luaL_check_int(1));
+  lua_Object val;
+  char *name;
+  if (func == LUA_NOOBJECT)  /* level out of range? */
+    return;  /* return nil */
+  else if (lua_getparam(2) != LUA_NOOBJECT) {  /* 2nd argument? */
+    if ((val = lua_getlocal(func, findlocal(func, 2), &name)) != LUA_NOOBJECT) {
+      lua_pushobject(val);
+      lua_pushstring(name);
+    }
+    /* else return nil */
+  }
+  else {  /* collect all locals in a table */
+    lua_Object result = lua_createtable();
+    int i;
+    for (i=1; ;i++) {
+      if ((val = lua_getlocal(func, i, &name)) == LUA_NOOBJECT)
+        break;
+      lua_pushobject(result);
+      lua_pushstring(name);
+      lua_pushobject(val);
+      lua_settable();  /* result[name] = value */
+    }
+    lua_pushobject(result);
+  }
+}
+
+
+static void setlocal (void) {
+  lua_Object func = lua_stackedfunction(luaL_check_int(1));
+  int numvar;
+  luaL_arg_check(func != LUA_NOOBJECT, 1, "level out of range");
+  numvar = findlocal(func, 2);
+  lua_pushobject(luaL_nonnullarg(3));
+  if (!lua_setlocal(func, numvar))
+    lua_error("no such local variable");
+}
+
+
+
+static int linehook = -1;  /* Lua reference to line hook function */
+static int callhook = -1;  /* Lua reference to call hook function */
+
+
+static void dohook (int ref) {
+  lua_LHFunction oldlinehook = lua_setlinehook(NULL);
+  lua_CHFunction oldcallhook = lua_setcallhook(NULL);
+  lua_callfunction(lua_getref(ref));
+  lua_setlinehook(oldlinehook);
+  lua_setcallhook(oldcallhook);
+}
+
+
+static void linef (int line) {
+  lua_pushnumber(line);
+  dohook(linehook);
+}
+
+
+static void callf (lua_Function func, char *file, int line) {
+  if (func != LUA_NOOBJECT) {
+    lua_pushobject(func);
+    lua_pushstring(file);
+    lua_pushnumber(line);
+  }
+  dohook(callhook);
+}
+
+
+static void setcallhook (void) {
+  lua_Object f = lua_getparam(1);
+  lua_unref(callhook);
+  if (f == LUA_NOOBJECT) {
+    callhook = -1;
+    lua_setcallhook(NULL);
+  }
+  else {
+    lua_pushobject(f);
+    callhook = lua_ref(1);
+    lua_setcallhook(callf);
+  }
+}
+
+
+static void setlinehook (void) {
+  lua_Object f = lua_getparam(1);
+  lua_unref(linehook);
+  if (f == LUA_NOOBJECT) {
+    linehook = -1;
+    lua_setlinehook(NULL);
+  }
+  else {
+    lua_pushobject(f);
+    linehook = lua_ref(1);
+    lua_setlinehook(linef);
+  }
+}
+
+
+static struct luaL_reg dblib[] = {
+  {"funcinfo", funcinfo},
+  {"getlocal", getlocal},
+  {"getstack", getstack},
+  {"setcallhook", setcallhook},
+  {"setlinehook", setlinehook},
+  {"setlocal", setlocal}
+};
+
+
+void lua_dblibopen (void) {
+  luaL_openlib(dblib, (sizeof(dblib)/sizeof(dblib[0])));
+}
+

ldo.c

@@ -0,0 +1,385 @@
+/*
+** $Id: ldo.c,v 1.44 1999/06/17 17:04:03 roberto Exp roberto $
+** Stack and Call structure of Lua
+** See Copyright Notice in lua.h
+*/
+
+
+#include <setjmp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltm.h"
+#include "lua.h"
+#include "luadebug.h"
+#include "lundump.h"
+#include "lvm.h"
+#include "lzio.h"
+
+
+
+#ifndef STACK_LIMIT
+#define STACK_LIMIT     6000  /* arbitrary limit */
+#endif
+
+
+
+#define STACK_UNIT	128
+
+
+#ifdef DEBUG
+#undef STACK_UNIT
+#define STACK_UNIT	2
+#endif
+
+
+void luaD_init (void) {
+  L->stack.stack = luaM_newvector(STACK_UNIT, TObject);
+  L->stack.top = L->stack.stack;
+  L->stack.last = L->stack.stack+(STACK_UNIT-1);
+}
+
+
+void luaD_checkstack (int n) {
+  struct Stack *S = &L->stack;
+  if (S->last-S->top <= n) {
+    StkId top = S->top-S->stack;
+    int stacksize = (S->last-S->stack)+STACK_UNIT+n;
+    luaM_reallocvector(S->stack, stacksize, TObject);
+    S->last = S->stack+(stacksize-1);
+    S->top = S->stack + top;
+    if (stacksize >= STACK_LIMIT) {  /* stack overflow? */
+      if (lua_stackedfunction(100) == LUA_NOOBJECT)  /* 100 funcs on stack? */
+        lua_error("Lua2C - C2Lua overflow"); /* doesn't look like a rec. loop */
+      else
+        lua_error("stack size overflow");
+    }
+  }
+}
+
+
+/*
+** Adjust stack. Set top to the given value, pushing NILs if needed.
+*/
+void luaD_adjusttop (StkId newtop) {
+  int diff = newtop-(L->stack.top-L->stack.stack);
+  if (diff <= 0)
+    L->stack.top += diff;
+  else {
+    luaD_checkstack(diff);
+    while (diff--)
+      ttype(L->stack.top++) = LUA_T_NIL;
+  }
+}
+
+
+/*
+** Open a hole below "nelems" from the L->stack.top.
+*/
+void luaD_openstack (int nelems) {
+  luaO_memup(L->stack.top-nelems+1, L->stack.top-nelems,
+             nelems*sizeof(TObject));
+  incr_top;
+}
+
+
+void luaD_lineHook (int line) {
+  struct C_Lua_Stack oldCLS = L->Cstack;
+  StkId old_top = L->Cstack.lua2C = L->Cstack.base = L->stack.top-L->stack.stack;
+  L->Cstack.num = 0;
+  (*L->linehook)(line);
+  L->stack.top = L->stack.stack+old_top;
+  L->Cstack = oldCLS;
+}
+
+
+void luaD_callHook (StkId base, TProtoFunc *tf, int isreturn) {
+  struct C_Lua_Stack oldCLS = L->Cstack;
+  StkId old_top = L->Cstack.lua2C = L->Cstack.base = L->stack.top-L->stack.stack;
+  L->Cstack.num = 0;
+  if (isreturn)
+    (*L->callhook)(LUA_NOOBJECT, "(return)", 0);
+  else {
+    TObject *f = L->stack.stack+base-1;
+    if (tf)
+      (*L->callhook)(Ref(f), tf->source->str, tf->lineDefined);
+    else
+      (*L->callhook)(Ref(f), "(C)", -1);
+  }
+  L->stack.top = L->stack.stack+old_top;
+  L->Cstack = oldCLS;
+}
+
+
+/*
+** Call a C function.
+** Cstack.num is the number of arguments; Cstack.lua2C points to the
+** first argument. Returns an index to the first result from C.
+*/
+static StkId callC (lua_CFunction f, StkId base) {
+  struct C_Lua_Stack *cls = &L->Cstack;
+  struct C_Lua_Stack oldCLS = *cls;
+  StkId firstResult;
+  int numarg = (L->stack.top-L->stack.stack) - base;
+  cls->num = numarg;
+  cls->lua2C = base;
+  cls->base = base+numarg;  /* == top-stack */
+  if (L->callhook)
+    luaD_callHook(base, NULL, 0);
+  (*f)();  /* do the actual call */
+  if (L->callhook)  /* func may have changed callhook */
+    luaD_callHook(base, NULL, 1);
+  firstResult = cls->base;
+  *cls = oldCLS;
+  return firstResult;
+}
+
+
+static StkId callCclosure (struct Closure *cl, lua_CFunction f, StkId base) {
+  TObject *pbase;
+  int nup = cl->nelems;  /* number of upvalues */
+  luaD_checkstack(nup);
+  pbase = L->stack.stack+base;  /* care: previous call may change this */
+  /* open space for upvalues as extra arguments */
+  luaO_memup(pbase+nup, pbase, (L->stack.top-pbase)*sizeof(TObject));
+  /* copy upvalues into stack */
+  memcpy(pbase, cl->consts+1, nup*sizeof(TObject));
+  L->stack.top += nup;
+  return callC(f, base);
+}
+
+
+void luaD_callTM (TObject *f, int nParams, int nResults) {
+  luaD_openstack(nParams);
+  *(L->stack.top-nParams-1) = *f;
+  luaD_calln(nParams, nResults);
+}
+
+
+/*
+** Call a function (C or Lua). The parameters must be on the stack,
+** between [top-nArgs,top). The function to be called is right below the
+** arguments.
+** When returns, the results are on the stack, between [top-nArgs-1,top).
+** The number of results is nResults, unless nResults=MULT_RET.
+*/
+void luaD_calln (int nArgs, int nResults) {
+  struct Stack *S = &L->stack;  /* to optimize */
+  StkId base = (S->top-S->stack)-nArgs;
+  TObject *func = S->stack+base-1;
+  StkId firstResult;
+  int i;
+  switch (ttype(func)) {
+    case LUA_T_CPROTO:
+      ttype(func) = LUA_T_CMARK;
+      firstResult = callC(fvalue(func), base);
+      break;
+    case LUA_T_PROTO:
+      ttype(func) = LUA_T_PMARK;
+      firstResult = luaV_execute(NULL, tfvalue(func), base);
+      break;
+    case LUA_T_CLOSURE: {
+      Closure *c = clvalue(func);
+      TObject *proto = &(c->consts[0]);
+      ttype(func) = LUA_T_CLMARK;
+      firstResult = (ttype(proto) == LUA_T_CPROTO) ?
+                       callCclosure(c, fvalue(proto), base) :
+                       luaV_execute(c, tfvalue(proto), base);
+      break;
+    }
+    default: { /* func is not a function */
+      /* Check the tag method for invalid functions */
+      TObject *im = luaT_getimbyObj(func, IM_FUNCTION);
+      if (ttype(im) == LUA_T_NIL)
+        lua_error("call expression not a function");
+      luaD_callTM(im, (S->top-S->stack)-(base-1), nResults);
+      return;
+    }
+  }
+  /* adjust the number of results */
+  if (nResults == MULT_RET)
+    nResults = (S->top-S->stack)-firstResult;
+  else
+    luaD_adjusttop(firstResult+nResults);
+  /* move results to base-1 (to erase parameters and function) */
+  base--;
+  for (i=0; i<nResults; i++)
+    *(S->stack+base+i) = *(S->stack+firstResult+i);
+  S->top -= firstResult-base;
+}
+
+
+/*
+** Traverse all objects on L->stack.stack
+*/
+void luaD_travstack (int (*fn)(TObject *))
+{
+  StkId i;
+  for (i = (L->stack.top-1)-L->stack.stack; i>=0; i--)
+    fn(L->stack.stack+i);
+}
+
+
+
+static void message (char *s) {
+  TObject *em = &(luaS_new("_ERRORMESSAGE")->u.s.globalval);
+  if (ttype(em) == LUA_T_PROTO || ttype(em) == LUA_T_CPROTO ||
+      ttype(em) == LUA_T_CLOSURE) {
+    *L->stack.top = *em;
+    incr_top;
+    lua_pushstring(s);
+    luaD_calln(1, 0);
+  }
+}
+
+/*
+** Reports an error, and jumps up to the available recover label
+*/
+void lua_error (char *s) {
+  if (s) message(s);
+  if (L->errorJmp)
+    longjmp(L->errorJmp->b, 1);
+  else {
+    message("exit(1). Unable to recover.\n");
+    exit(1);
+  }
+}
+
+
+/*
+** Execute a protected call. Assumes that function is at L->Cstack.base and
+** parameters are on top of it. Leave nResults on the stack.
+*/
+int luaD_protectedrun (void) {
+  volatile struct C_Lua_Stack oldCLS = L->Cstack;
+  struct lua_longjmp myErrorJmp;
+  volatile int status;
+  struct lua_longjmp *volatile oldErr = L->errorJmp;
+  L->errorJmp = &myErrorJmp;
+  if (setjmp(myErrorJmp.b) == 0) {
+    StkId base = L->Cstack.base;
+    luaD_calln((L->stack.top-L->stack.stack)-base-1, MULT_RET);
+    L->Cstack.lua2C = base;  /* position of the new results */
+    L->Cstack.num = (L->stack.top-L->stack.stack) - base;
+    L->Cstack.base = base + L->Cstack.num;  /* incorporate results on stack */
+    status = 0;
+  }
+  else {  /* an error occurred: restore L->Cstack and L->stack.top */
+    L->Cstack = oldCLS;
+    L->stack.top = L->stack.stack+L->Cstack.base;
+    status = 1;
+  }
+  L->errorJmp = oldErr;
+  return status;
+}
+
+
+/*
+** returns 0 = chunk loaded; 1 = error; 2 = no more chunks to load
+*/
+static int protectedparser (ZIO *z, int bin) {
+  volatile struct C_Lua_Stack oldCLS = L->Cstack;
+  struct lua_longjmp myErrorJmp;
+  volatile int status;
+  TProtoFunc *volatile tf;
+  struct lua_longjmp *volatile oldErr = L->errorJmp;
+  L->errorJmp = &myErrorJmp;
+  if (setjmp(myErrorJmp.b) == 0) {
+    tf = bin ? luaU_undump1(z) : luaY_parser(z);
+    status = 0;
+  }
+  else {  /* an error occurred: restore L->Cstack and L->stack.top */
+    L->Cstack = oldCLS;
+    L->stack.top = L->stack.stack+L->Cstack.base;
+    tf = NULL;
+    status = 1;
+  }
+  L->errorJmp = oldErr;
+  if (status) return 1;  /* error code */
+  if (tf == NULL) return 2;  /* 'natural' end */
+  luaD_adjusttop(L->Cstack.base+1);  /* one slot for the pseudo-function */
+  L->stack.stack[L->Cstack.base].ttype = LUA_T_PROTO;
+  L->stack.stack[L->Cstack.base].value.tf = tf;
+  luaV_closure(0);
+  return 0;
+}
+
+
+static int do_main (ZIO *z, int bin) {
+  int status;
+  int debug = L->debug;  /* save debug status */
+  do {
+    long old_blocks = (luaC_checkGC(), L->nblocks);
+    status = protectedparser(z, bin);
+    if (status == 1) return 1;  /* error */
+    else if (status == 2) return 0;  /* 'natural' end */
+    else {
+      unsigned long newelems2 = 2*(L->nblocks-old_blocks);
+      L->GCthreshold += newelems2;
+      status = luaD_protectedrun();
+      L->GCthreshold -= newelems2;
+    }
+  } while (bin && status == 0);
+  L->debug = debug;  /* restore debug status */
+  return status;
+}
+
+
+void luaD_gcIM (TObject *o)
+{
+  TObject *im = luaT_getimbyObj(o, IM_GC);
+  if (ttype(im) != LUA_T_NIL) {
+    *L->stack.top = *o;
+    incr_top;
+    luaD_callTM(im, 1, 0);
+  }
+}
+
+
+#define	MAXFILENAME	260	/* maximum part of a file name kept */
+
+int lua_dofile (char *filename) {
+  ZIO z;
+  int status;
+  int c;
+  int bin;
+  char source[MAXFILENAME];
+  FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
+  if (f == NULL)
+    return 2;
+  c = fgetc(f);
+  ungetc(c, f);
+  bin = (c == ID_CHUNK);
+  if (bin)
+    f = freopen(filename, "rb", f);  /* set binary mode */
+  luaL_filesource(source, filename, sizeof(source));
+  luaZ_Fopen(&z, f, source);
+  status = do_main(&z, bin);
+  if (f != stdin)
+    fclose(f);
+  return status;
+}
+
+
+int lua_dostring (char *str) {
+  return lua_dobuffer(str, strlen(str), str);
+}
+
+
+int lua_dobuffer (char *buff, int size, char *name) {
+  ZIO z;
+  if (!name) name = "?";
+  luaZ_mopen(&z, buff, size, name);
+  return do_main(&z, buff[0]==ID_CHUNK);
+}
+

ldo.h

@@ -0,0 +1,46 @@
+/*
+** $Id: ldo.h,v 1.5 1998/07/12 16:14:34 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"
+
+
+#define MULT_RET        255
+
+
+
+/*
+** macro to increment stack top.
+** There must be always an empty slot at the L->stack.top
+*/
+#define incr_top { if (L->stack.top >= L->stack.last) luaD_checkstack(1); \
+                   L->stack.top++; }
+
+
+/* macros to convert from lua_Object to (TObject *) and back */
+
+#define Address(lo)     ((lo)+L->stack.stack-1)
+#define Ref(st)         ((st)-L->stack.stack+1)
+
+
+void luaD_init (void);
+void luaD_adjusttop (StkId newtop);
+void luaD_openstack (int nelems);
+void luaD_lineHook (int line);
+void luaD_callHook (StkId base, TProtoFunc *tf, int isreturn);
+void luaD_calln (int nArgs, int nResults);
+void luaD_callTM (TObject *f, int nParams, int nResults);
+int luaD_protectedrun (void);
+void luaD_gcIM (TObject *o);
+void luaD_travstack (int (*fn)(TObject *));
+void luaD_checkstack (int n);
+
+
+#endif

lex.c

@@ -1,357 +0,0 @@
-char *rcs_lex = "$Id: lex.c,v 2.20 1995/10/25 13:05:51 roberto Exp roberto $";
- 
-
-#include <ctype.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "mem.h"
-#include "tree.h"
-#include "table.h"
-#include "opcode.h"
-#include "inout.h"
-#include "parser.h"
-#include "ugly.h"
-
-#define MINBUFF 260
-
-#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b)))
-
-#define next() { current = input(); }
-#define save(x) { *yytextLast++ = (x); }
-#define save_and_next()  { save(current); next(); }
-
-static int current;
-static char *yytext = NULL;
-static int textsize = 0;
-static char *yytextLast;
-
-static Input input;
-
-void lua_setinput (Input fn)
-{
-  current = ' ';
-  input = fn;
-  if (yytext == NULL)
-  {
-    textsize = MINBUFF;
-    yytext = newvector(textsize, char);
-  }
-}
-
-char *lua_lasttext (void)
-{
-  *yytextLast = 0;
-  return yytext;
-}
-
-
-/* The reserved words must be listed in lexicographic order */
-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]))
-
-
-static int findReserved (char *name)
-{
-  int l = 0;
-  int h = RESERVEDSIZE - 1;
-  while (l <= h)
-  {
-    int m = (l+h)/2;
-    int comp = lua_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;
-}
-
-
-static void growtext (void)
-{
-  int size = yytextLast - yytext;
-  textsize *= 2;
-  yytext = growvector(yytext, textsize, char);
-  yytextLast = yytext + size;
-}
-
-
-static int read_long_string (void)
-{
-  int cont = 0;
-  int spaceleft = textsize - (yytextLast - yytext);
-  while (1)
-  {
-    if (spaceleft <= 2)  /* may read more than 1 char in one cicle */
-    {
-      growtext();
-      spaceleft = textsize - (yytextLast - yytext);
-    }
-    switch (current)
-    {
-      case EOF:
-      case 0:
-        return WRONGTOKEN;
-      case '[':
-        save_and_next(); spaceleft--;
-        if (current == '[')
-        {
-          cont++;
-          save_and_next(); spaceleft--;
-        }
-        continue; 
-      case ']':
-        save_and_next(); spaceleft--;
-        if (current == ']')
-        {
-          if (cont == 0) return STRING;
-          cont--;
-          save_and_next(); spaceleft--;
-        }
-        continue; 
-      case '\n':
-        lua_linenumber++;  /* goes through */
-      default:
-        save_and_next(); spaceleft--;
-    }
-  }
-}
-
-
-int yylex (void)
-{
-  float a;
-  static int linelasttoken = 0;
-  if (lua_debug)
-    luaI_codedebugline(linelasttoken);
-  linelasttoken = lua_linenumber;
-  while (1)
-  {
-    yytextLast = yytext;
-#if 0
-    fprintf(stderr,"'%c' %d\n",current,current);
-#endif
-    switch (current)
-    {
-      case EOF:
-      case 0:
-       return 0;
-      case '\n': linelasttoken = ++lua_linenumber;
-      case ' ':
-      case '\r':  /* CR: to avoid problems with DOS/Windows */
-      case '\t':
-        next();
-        continue;
-
-      case '$':
-	next();
-	while (isalnum(current) || current == '_')
-          save_and_next();
-        *yytextLast = 0;
-	if (lua_strcmp(yytext, "debug") == 0)
-	{
-	  yylval.vInt = 1;
-	  return DEBUG;
-        }
-	else if (lua_strcmp(yytext, "nodebug") == 0)
-	{
-	  yylval.vInt = 0;
-	  return DEBUG;
-        }
-	return WRONGTOKEN;
-
-      case '-':
-        save_and_next();
-        if (current != '-') return '-';  /* else goes through */
-      case '#':
-        do { next(); } while (current != '\n' && current != 0);
-        continue;
-
-      case '[':
-        save_and_next();
-        if (current != '[') return '[';
-        else
-        {
-          save_and_next();  /* pass the second '[' */
-          if (read_long_string() == WRONGTOKEN)
-            return WRONGTOKEN;
-          save_and_next();  /* pass the second ']' */
-          *(yytextLast-2) = 0;  /* erases ']]' */
-          yylval.vWord = luaI_findconstantbyname(yytext+2);
-          return STRING;
-        }
-
-      case '=':
-        save_and_next();
-        if (current != '=') return '=';
-        else { save_and_next(); return EQ; }
-
-      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;
-        int spaceleft = textsize - (yytextLast - yytext);
-        next();  /* skip the delimiter */
-        while (current != del)
-        {
-          if (spaceleft <= 2) /* may read more than 1 char in one cicle */
-          {
-            growtext();
-            spaceleft = textsize - (yytextLast - yytext);
-          }
-          spaceleft--;
-          switch (current)
-          {
-            case EOF:
-            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(current); next(); break;
-              }
-              break;
-            default:
-              save_and_next();
-          }
-        }
-        next();  /* skip the delimiter */
-        *yytextLast = 0;
-        yylval.vWord = luaI_findconstantbyname(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 '_':
-      {
-        Word res;
-        do { save_and_next(); } while (isalnum(current) || current == '_');
-        *yytextLast = 0;
-        res = findReserved(yytext);
-        if (res) return res;
-        yylval.pNode = lua_constcreate(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 */
-	a=0.0;
-        goto fraction;
-
-      case '0': case '1': case '2': case '3': case '4':
-      case '5': case '6': case '7': case '8': case '9':
-	a=0.0;
-        do { a=10*a+current-'0'; save_and_next(); } while (isdigit(current));
-        if (current == '.') save_and_next();
-fraction:
-	{ float da=0.1;
-	  while (isdigit(current))
-	  {a+=(current-'0')*da; da/=10.0; save_and_next()};
-          if (current == 'e' || current == 'E')
-          {
-	    int e=0;
-	    int neg;
-	    float ea;
-            save_and_next();
-	    neg=(current=='-');
-            if (current == '+' || current == '-') save_and_next();
-            if (!isdigit(current)) return WRONGTOKEN;
-            do { e=10*e+current-'0'; save_and_next(); } while (isdigit(current));
-	    for (ea=neg?0.1:10.0; e>0; e>>=1) 
-	    {
-	      if (e & 1) a*=ea;
-	      ea*=ea;
-	    }
-          }
-          yylval.vFloat = a;
-          return NUMBER;
-        }
-
-      case U_and: case U_do: case U_else: case U_elseif: case U_end:
-      case U_function: case U_if: case U_local: case U_nil: case U_not:
-      case U_or: case U_repeat: case U_return: case U_then:
-      case U_until: case U_while:
-      {
-        int old = current;
-        next();
-        return reserved[old-U_and].token;
-      }
-
-      case U_eq:	next(); return EQ;
-      case U_le:	next(); return LE;
-      case U_ge:	next(); return GE;
-      case U_ne:	next(); return NE;
-      case U_sc:	next(); return CONC;
-
-      default: 		/* also end of file */
-      {
-        save_and_next();
-        return yytext[0];
-      }
-    }
-  }
-}

lfunc.c

@@ -0,0 +1,98 @@
+/*
+** $Id: lfunc.c,v 1.9 1998/06/19 16:14:09 roberto Exp roberto $
+** Auxiliary functions to manipulate prototypes and closures
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#include "lfunc.h"
+#include "lmem.h"
+#include "lstate.h"
+
+#define gcsizeproto(p)	5  /* approximate "weight" for a prototype */
+#define gcsizeclosure(c) 1  /* approximate "weight" for a closure */
+
+
+
+Closure *luaF_newclosure (int nelems)
+{
+  Closure *c = (Closure *)luaM_malloc(sizeof(Closure)+nelems*sizeof(TObject));
+  luaO_insertlist(&(L->rootcl), (GCnode *)c);
+  L->nblocks += gcsizeclosure(c);
+  c->nelems = nelems;
+  return c;
+}
+
+
+TProtoFunc *luaF_newproto (void)
+{
+  TProtoFunc *f = luaM_new(TProtoFunc);
+  f->code = NULL;
+  f->lineDefined = 0;
+  f->source = NULL;
+  f->consts = NULL;
+  f->nconsts = 0;
+  f->locvars = NULL;
+  luaO_insertlist(&(L->rootproto), (GCnode *)f);
+  L->nblocks += gcsizeproto(f);
+  return f;
+}
+
+
+
+static void freefunc (TProtoFunc *f)
+{
+  luaM_free(f->code);
+  luaM_free(f->locvars);
+  luaM_free(f->consts);
+  luaM_free(f);
+}
+
+
+void luaF_freeproto (TProtoFunc *l)
+{
+  while (l) {
+    TProtoFunc *next = (TProtoFunc *)l->head.next;
+    L->nblocks -= gcsizeproto(l);
+    freefunc(l);
+    l = next;
+  }
+}
+
+
+void luaF_freeclosure (Closure *l)
+{
+  while (l) {
+    Closure *next = (Closure *)l->head.next;
+    L->nblocks -= gcsizeclosure(l);
+    luaM_free(l);
+    l = next;
+  }
+}
+
+
+/*
+** Look for n-th local variable at line "line" in function "func".
+** Returns NULL if not found.
+*/
+char *luaF_getlocalname (TProtoFunc *func, int local_number, int line)
+{
+  int count = 0;
+  char *varname = NULL;
+  LocVar *lv = func->locvars;
+  if (lv == NULL)
+    return NULL;
+  for (; lv->line != -1 && lv->line < line; lv++) {
+    if (lv->varname) {  /* register */
+      if (++count == local_number)
+        varname = lv->varname->str;
+    }
+    else  /* unregister */
+      if (--count < local_number)
+        varname = NULL;
+  }
+  return varname;
+}
+

lfunc.h

@@ -0,0 +1,23 @@
+/*
+** $Id: lfunc.h,v 1.4 1997/11/19 17:29:23 roberto Exp roberto $
+** Lua Function structures
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lfunc_h
+#define lfunc_h
+
+
+#include "lobject.h"
+
+
+
+TProtoFunc *luaF_newproto (void);
+Closure *luaF_newclosure (int nelems);
+void luaF_freeproto (TProtoFunc *l);
+void luaF_freeclosure (Closure *l);
+
+char *luaF_getlocalname (TProtoFunc *func, int local_number, int line);
+
+
+#endif

lgc.c

@@ -0,0 +1,275 @@
+/*
+** $Id: lgc.c,v 1.22 1999/02/26 15:48:55 roberto Exp roberto $
+** Garbage Collector
+** See Copyright Notice in lua.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"
+#include "lua.h"
+
+
+
+static int markobject (TObject *o);
+
+
+
+/*
+** =======================================================
+** REF mechanism
+** =======================================================
+*/
+
+
+int luaC_ref (TObject *o, int lock) {
+  int ref;
+  if (ttype(o) == LUA_T_NIL)
+    ref = -1;   /* special ref for nil */
+  else {
+    for (ref=0; ref<L->refSize; ref++)
+      if (L->refArray[ref].status == FREE)
+        break;
+    if (ref == L->refSize) {  /* no more empty spaces? */
+      luaM_growvector(L->refArray, L->refSize, 1, struct ref, refEM, MAX_INT);
+      L->refSize++;
+    }
+    L->refArray[ref].o = *o;
+    L->refArray[ref].status = lock ? LOCK : HOLD;
+  }
+  return ref;
+}
+
+
+void lua_unref (int ref)
+{
+  if (ref >= 0 && ref < L->refSize)
+    L->refArray[ref].status = FREE;
+}
+
+
+TObject* luaC_getref (int ref)
+{
+  if (ref == -1)
+    return &luaO_nilobject;
+  if (ref >= 0 && ref < L->refSize &&
+      (L->refArray[ref].status == LOCK || L->refArray[ref].status == HOLD))
+    return &L->refArray[ref].o;
+  else
+    return NULL;
+}
+
+
+static void travlock (void)
+{
+  int i;
+  for (i=0; i<L->refSize; i++)
+    if (L->refArray[i].status == LOCK)
+      markobject(&L->refArray[i].o);
+}
+
+
+static int ismarked (TObject *o)
+{
+  /* valid only for locked objects */
+  switch (o->ttype) {
+    case LUA_T_STRING: case LUA_T_USERDATA:
+      return o->value.ts->head.marked;
+    case LUA_T_ARRAY:
+      return o->value.a->head.marked;
+    case LUA_T_CLOSURE:
+      return o->value.cl->head.marked;
+    case LUA_T_PROTO:
+      return o->value.tf->head.marked;
+#ifdef DEBUG
+    case LUA_T_LINE: case LUA_T_CLMARK:
+    case LUA_T_CMARK: case LUA_T_PMARK:
+      LUA_INTERNALERROR("invalid type");
+#endif
+    default:  /* nil, number or cproto */
+      return 1;
+  }
+}
+
+
+static void invalidaterefs (void)
+{
+  int i;
+  for (i=0; i<L->refSize; i++)
+    if (L->refArray[i].status == HOLD && !ismarked(&L->refArray[i].o))
+      L->refArray[i].status = COLLECTED;
+}
+
+
+
+void luaC_hashcallIM (Hash *l)
+{
+  TObject t;
+  ttype(&t) = LUA_T_ARRAY;
+  for (; l; l=(Hash *)l->head.next) {
+    avalue(&t) = l;
+    luaD_gcIM(&t);
+  }
+}
+
+
+void luaC_strcallIM (TaggedString *l)
+{
+  TObject o;
+  ttype(&o) = LUA_T_USERDATA;
+  for (; l; l=(TaggedString *)l->head.next)
+    if (l->constindex == -1) {  /* is userdata? */
+      tsvalue(&o) = l;
+      luaD_gcIM(&o);
+    }
+}
+
+
+
+static GCnode *listcollect (GCnode *l)
+{
+  GCnode *frees = NULL;
+  while (l) {
+    GCnode *next = l->next;
+    l->marked = 0;
+    while (next && !next->marked) {
+      l->next = next->next;
+      next->next = frees;
+      frees = next;
+      next = l->next;
+    }
+    l = next;
+  }
+  return frees;
+}
+
+
+static void strmark (TaggedString *s)
+{
+  if (!s->head.marked)
+    s->head.marked = 1;
+}
+
+
+static void protomark (TProtoFunc *f) {
+  if (!f->head.marked) {
+    int i;
+    f->head.marked = 1;
+    strmark(f->source);
+    for (i=0; i<f->nconsts; i++)
+      markobject(&f->consts[i]);
+  }
+}
+
+
+static void closuremark (Closure *f)
+{
+  if (!f->head.marked) {
+    int i;
+    f->head.marked = 1;
+    for (i=f->nelems; i>=0; i--)
+      markobject(&f->consts[i]);
+  }
+}
+
+
+static void hashmark (Hash *h)
+{
+  if (!h->head.marked) {
+    int i;
+    h->head.marked = 1;
+    for (i=0; i<nhash(h); i++) {
+      Node *n = node(h,i);
+      if (ttype(ref(n)) != LUA_T_NIL) {
+        markobject(&n->ref);
+        markobject(&n->val);
+      }
+    }
+  }
+}
+
+
+static void globalmark (void)
+{
+  TaggedString *g;
+  for (g=(TaggedString *)L->rootglobal.next; g; g=(TaggedString *)g->head.next){
+    LUA_ASSERT(g->constindex >= 0, "userdata in global list");
+    if (g->u.s.globalval.ttype != LUA_T_NIL) {
+      markobject(&g->u.s.globalval);
+      strmark(g);  /* cannot collect non nil global variables */
+    }
+  }
+}
+
+
+static int markobject (TObject *o)
+{
+  switch (ttype(o)) {
+    case LUA_T_USERDATA:  case LUA_T_STRING:
+      strmark(tsvalue(o));
+      break;
+    case LUA_T_ARRAY:
+      hashmark(avalue(o));
+      break;
+    case LUA_T_CLOSURE:  case LUA_T_CLMARK:
+      closuremark(o->value.cl);
+      break;
+    case LUA_T_PROTO: case LUA_T_PMARK:
+      protomark(o->value.tf);
+      break;
+    default: break;  /* numbers, cprotos, etc */
+  }
+  return 0;
+}
+
+
+
+static void markall (void)
+{
+  luaD_travstack(markobject); /* mark stack objects */
+  globalmark();  /* mark global variable values and names */
+  travlock(); /* mark locked objects */
+  luaT_travtagmethods(markobject);  /* mark fallbacks */
+}
+
+
+long lua_collectgarbage (long limit)
+{
+  unsigned long recovered = L->nblocks;  /* to subtract nblocks after gc */
+  Hash *freetable;
+  TaggedString *freestr;
+  TProtoFunc *freefunc;
+  Closure *freeclos;
+  markall();
+  invalidaterefs();
+  freestr = luaS_collector();
+  freetable = (Hash *)listcollect(&(L->roottable));
+  freefunc = (TProtoFunc *)listcollect(&(L->rootproto));
+  freeclos = (Closure *)listcollect(&(L->rootcl));
+  L->GCthreshold *= 4;  /* to avoid GC during GC */
+  luaC_hashcallIM(freetable);  /* GC tag methods for tables */
+  luaC_strcallIM(freestr);  /* GC tag methods for userdata */
+  luaD_gcIM(&luaO_nilobject);  /* GC tag method for nil (signal end of GC) */
+  luaH_free(freetable);
+  luaS_free(freestr);
+  luaF_freeproto(freefunc);
+  luaF_freeclosure(freeclos);
+  recovered = recovered-L->nblocks;
+  L->GCthreshold = (limit == 0) ? 2*L->nblocks : L->nblocks+limit;
+  return recovered;
+}
+
+
+void luaC_checkGC (void)
+{
+  if (L->nblocks >= L->GCthreshold)
+    lua_collectgarbage(0);
+}
+

lgc.h

@@ -0,0 +1,21 @@
+/*
+** $Id: lgc.h,v 1.3 1997/11/19 17:29:23 roberto Exp roberto $
+** Garbage Collector
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lgc_h
+#define lgc_h
+
+
+#include "lobject.h"
+
+
+void luaC_checkGC (void);
+TObject* luaC_getref (int ref);
+int luaC_ref (TObject *o, int lock);
+void luaC_hashcallIM (Hash *l);
+void luaC_strcallIM (TaggedString *l);
+
+
+#endif

linit.c

@@ -0,0 +1,17 @@
+/*
+** $Id: linit.c,v 1.1 1999/01/08 16:47:44 roberto Exp $
+** Initialization of libraries for lua.c
+** See Copyright Notice in lua.h
+*/
+
+#include "lua.h"
+#include "lualib.h"
+
+
+void lua_userinit (void) {
+  lua_iolibopen();
+  lua_strlibopen();
+  lua_mathlibopen();
+  lua_dblibopen();
+}
+

liolib.c

@@ -0,0 +1,583 @@
+/*
+** $Id: liolib.c,v 1.40 1999/05/14 12:24:04 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>
+#include <time.h>
+
+#include "lauxlib.h"
+#include "lua.h"
+#include "luadebug.h"
+#include "lualib.h"
+
+
+#ifndef OLD_ANSI
+#include <locale.h>
+#else
+/* no support for locale and for strerror: fake them */
+#define setlocale(a,b)	0
+#define LC_ALL		0
+#define LC_COLLATE	0
+#define LC_CTYPE	0
+#define LC_MONETARY	0
+#define LC_NUMERIC	0
+#define LC_TIME		0
+#define strerror(e)	"(no error message provided by operating system)"
+#endif
+
+
+#define IOTAG	1
+
+#define FIRSTARG	2  /* 1st is upvalue */
+
+#define CLOSEDTAG(tag)	((tag)-1)  /* assume that CLOSEDTAG = iotag-1 */
+
+
+#define FINPUT		"_INPUT"
+#define FOUTPUT		"_OUTPUT"
+
+
+#ifdef POPEN
+FILE *popen();
+int pclose();
+#define CLOSEFILE(f)    {if (pclose(f) == -1) fclose(f);}
+#else
+/* no support for popen */
+#define popen(x,y) NULL  /* that is, popen always fails */
+#define CLOSEFILE(f)    {fclose(f);}
+#endif
+
+
+
+static void pushresult (int i) {
+  if (i)
+    lua_pushuserdata(NULL);
+  else {
+    lua_pushnil();
+    lua_pushstring(strerror(errno));
+    lua_pushnumber(errno);
+  }
+}
+
+
+/*
+** {======================================================
+** FILE Operations
+** =======================================================
+*/
+
+static int gettag (void) {
+  return (int)lua_getnumber(lua_getparam(IOTAG));
+}
+
+
+static int ishandle (lua_Object f) {
+  if (lua_isuserdata(f)) {
+    int tag = gettag();
+    if (lua_tag(f) == CLOSEDTAG(tag))
+      lua_error("cannot access a closed file");
+    return lua_tag(f) == tag;
+  }
+  else return 0;
+}
+
+
+static FILE *getfilebyname (char *name) {
+  lua_Object f = lua_getglobal(name);
+  if (!ishandle(f))
+      luaL_verror("global variable `%.50s' is not a file handle", name);
+  return lua_getuserdata(f);
+}
+
+
+static FILE *getfile (int arg) {
+  lua_Object f = lua_getparam(arg);
+  return (ishandle(f)) ? lua_getuserdata(f) : NULL;
+}
+
+
+static FILE *getnonullfile (int arg) {
+  FILE *f = getfile(arg);
+  luaL_arg_check(f, arg, "invalid file handle");
+  return f;
+}
+
+
+static FILE *getfileparam (char *name, int *arg) {
+  FILE *f = getfile(*arg);
+  if (f) {
+    (*arg)++;
+    return f;
+  }
+  else
+    return getfilebyname(name);
+}
+
+
+static void closefile (FILE *f) {
+  if (f != stdin && f != stdout) {
+    int tag = gettag();
+    CLOSEFILE(f);
+    lua_pushusertag(f, tag);
+    lua_settag(CLOSEDTAG(tag));
+  }
+}
+
+
+static void io_close (void) {
+  closefile(getnonullfile(FIRSTARG));
+}
+
+
+static void gc_close (void) {
+  FILE *f = getnonullfile(FIRSTARG);
+  if (f != stdin && f != stdout && f != stderr) {
+    CLOSEFILE(f);
+  }
+}
+
+
+static void io_open (void) {
+  FILE *f = fopen(luaL_check_string(FIRSTARG), luaL_check_string(FIRSTARG+1));
+  if (f) lua_pushusertag(f, gettag());
+  else pushresult(0);
+}
+
+
+static void setfile (FILE *f, char *name, int tag) {
+  lua_pushusertag(f, tag);
+  lua_setglobal(name);
+}
+
+
+static void setreturn (FILE *f, char *name) {
+  if (f == NULL)
+    pushresult(0);
+  else {
+    int tag = gettag();
+    setfile(f, name, tag);
+    lua_pushusertag(f, tag);
+  }
+}
+
+
+static void io_readfrom (void) {
+  FILE *current;
+  lua_Object f = lua_getparam(FIRSTARG);
+  if (f == LUA_NOOBJECT) {
+    closefile(getfilebyname(FINPUT));
+    current = stdin;
+  }
+  else if (lua_tag(f) == gettag())  /* deprecated option */
+    current = lua_getuserdata(f);
+  else {
+    char *s = luaL_check_string(FIRSTARG);
+    current = (*s == '|') ? popen(s+1, "r") : fopen(s, "r");
+  }
+  setreturn(current, FINPUT);
+}
+
+
+static void io_writeto (void) {
+  FILE *current;
+  lua_Object f = lua_getparam(FIRSTARG);
+  if (f == LUA_NOOBJECT) {
+    closefile(getfilebyname(FOUTPUT));
+    current = stdout;
+  }
+  else if (lua_tag(f) == gettag())  /* deprecated option */
+    current = lua_getuserdata(f);
+  else {
+    char *s = luaL_check_string(FIRSTARG);
+    current = (*s == '|') ? popen(s+1,"w") : fopen(s, "w");
+  }
+  setreturn(current, FOUTPUT);
+}
+
+
+static void io_appendto (void) {
+  FILE *current = fopen(luaL_check_string(FIRSTARG), "a");
+  setreturn(current, FOUTPUT);
+}
+
+
+
+/*
+** {======================================================
+** READ
+** =======================================================
+*/
+
+
+/*
+** We cannot lookahead without need, because this can lock stdin.
+** This flag signals when we need to read a next char.
+*/
+#define NEED_OTHER (EOF-1)  /* just some flag different from EOF */
+
+
+static int read_pattern (FILE *f, char *p) {
+  int inskip = 0;  /* {skip} level */
+  int c = NEED_OTHER;
+  while (*p != '\0') {
+    switch (*p) {
+      case '{':
+        inskip++;
+        p++;
+        continue;
+      case '}':
+        if (!inskip) lua_error("unbalanced braces in read pattern");
+        inskip--;
+        p++;
+        continue;
+      default: {
+        char *ep = luaI_classend(p);  /* get what is next */
+        int m;  /* match result */
+        if (c == NEED_OTHER) c = getc(f);
+        m = (c==EOF) ? 0 : luaI_singlematch(c, p, ep);
+        if (m) {
+          if (!inskip) luaL_addchar(c);
+          c = NEED_OTHER;
+        }
+        switch (*ep) {
+          case '+':  /* repetition (1 or more) */
+            if (!m) goto break_while;  /* pattern fails? */
+            /* else go through */
+          case '*':  /* repetition (0 or more) */
+            while (m) {  /* reads the same item until it fails */
+              c = getc(f);
+              m = (c==EOF) ? 0 : luaI_singlematch(c, p, ep);
+              if (m && !inskip) luaL_addchar(c);
+            }
+            /* go through to continue reading the pattern */
+          case '?':  /* optional */
+            p = ep+1;  /* continues reading the pattern */
+            continue;
+          default:
+            if (!m) goto break_while;  /* pattern fails? */
+            p = ep;  /* else continues reading the pattern */
+        }
+      }
+    }
+  } break_while:
+  if (c != NEED_OTHER) ungetc(c, f);
+  return (*p == '\0');
+}
+
+
+static int read_number (FILE *f) {
+  double d;
+  if (fscanf(f, "%lf", &d) == 1) {
+    lua_pushnumber(d);
+    return 1;
+  }
+  else return 0;  /* read fails */
+}
+
+
+#define HUNK_LINE	1024
+#define HUNK_FILE	BUFSIZ
+
+static int read_line (FILE *f) {
+  /* equivalent to: return read_pattern(f, "[^\n]*{\n}"); */
+  int n;
+  char *b;
+  do {
+    b = luaL_openspace(HUNK_LINE);
+    if (!fgets(b, HUNK_LINE, f)) return 0;  /* read fails */
+    n = strlen(b);
+    luaL_addsize(n); 
+  } while (b[n-1] != '\n');
+  luaL_addsize(-1);  /* remove '\n' */
+  return 1;
+}
+
+
+static void read_file (FILE *f) {
+  /* equivalent to: return read_pattern(f, ".*"); */
+  int n;
+  do {
+    char *b = luaL_openspace(HUNK_FILE);
+    n = fread(b, sizeof(char), HUNK_FILE, f);
+    luaL_addsize(n); 
+  } while (n==HUNK_FILE);
+}
+
+
+static void io_read (void) {
+  static char *options[] = {"*n", "*l", "*a", ".*", "*w", NULL};
+  int arg = FIRSTARG;
+  FILE *f = getfileparam(FINPUT, &arg);
+  char *p = luaL_opt_string(arg++, "*l");
+  do { /* repeat for each part */
+    long l;
+    int success;
+    luaL_resetbuffer();
+    switch (luaL_findstring(p, options)) {
+      case 0:  /* number */
+        if (!read_number(f)) return;  /* read fails */
+        continue;  /* number is already pushed; avoid the "pushstring" */
+      case 1:  /* line */
+        success = read_line(f);
+        break;
+      case 2: case 3:  /* file */
+        read_file(f);
+        success = 1; /* always success */
+        break;
+      case 4:  /* word */
+        success = read_pattern(f, "{%s*}%S+");
+        break;
+      default:
+        success = read_pattern(f, p);
+    }
+    l = luaL_getsize();
+    if (!success && l==0) return;  /* read fails */
+    lua_pushlstring(luaL_buffer(), l);
+  } while ((p = luaL_opt_string(arg++, NULL)) != NULL);
+}
+
+/* }====================================================== */
+
+
+static void io_write (void) {
+  int arg = FIRSTARG;
+  FILE *f = getfileparam(FOUTPUT, &arg);
+  int status = 1;
+  char *s;
+  long l;
+  while ((s = luaL_opt_lstr(arg++, NULL, &l)) != NULL)
+    status = status && ((long)fwrite(s, 1, l, f) == l);
+  pushresult(status);
+}
+
+
+static void io_seek (void) {
+  static int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
+  static char *modenames[] = {"set", "cur", "end", NULL};
+  FILE *f = getnonullfile(FIRSTARG);
+  int op = luaL_findstring(luaL_opt_string(FIRSTARG+1, "cur"), modenames);
+  long offset = luaL_opt_long(FIRSTARG+2, 0);
+  luaL_arg_check(op != -1, FIRSTARG+1, "invalid mode");
+  op = fseek(f, offset, mode[op]);
+  if (op)
+    pushresult(0);  /* error */
+  else
+    lua_pushnumber(ftell(f));
+}
+
+
+static void io_flush (void) {
+  FILE *f = getfile(FIRSTARG);
+  luaL_arg_check(f || lua_getparam(FIRSTARG) == LUA_NOOBJECT, FIRSTARG,
+                 "invalid file handle");
+  pushresult(fflush(f) == 0);
+}
+
+/* }====================================================== */
+
+
+/*
+** {======================================================
+** Other O.S. Operations
+** =======================================================
+*/
+
+static void io_execute (void) {
+  lua_pushnumber(system(luaL_check_string(1)));
+}
+
+
+static void io_remove  (void) {
+  pushresult(remove(luaL_check_string(1)) == 0);
+}
+
+
+static void io_rename (void) {
+  pushresult(rename(luaL_check_string(1),
+                    luaL_check_string(2)) == 0);
+}
+
+
+static void io_tmpname (void) {
+  lua_pushstring(tmpnam(NULL));
+}
+
+
+
+static void io_getenv (void) {
+  lua_pushstring(getenv(luaL_check_string(1)));  /* if NULL push nil */
+}
+
+
+static void io_clock (void) {
+  lua_pushnumber(((double)clock())/CLOCKS_PER_SEC);
+}
+
+
+static void io_date (void) {
+  char b[256];
+  char *s = luaL_opt_string(1, "%c");
+  struct tm *tm;
+  time_t t;
+  time(&t); tm = localtime(&t);
+  if (strftime(b,sizeof(b),s,tm))
+    lua_pushstring(b);
+  else
+    lua_error("invalid `date' format");
+}
+
+
+static void setloc (void) {
+  static int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY, LC_NUMERIC,
+                      LC_TIME};
+  static char *catnames[] = {"all", "collate", "ctype", "monetary",
+     "numeric", "time", NULL};
+  int op = luaL_findstring(luaL_opt_string(2, "all"), catnames);
+  luaL_arg_check(op != -1, 2, "invalid option");
+  lua_pushstring(setlocale(cat[op], luaL_check_string(1)));
+}
+
+
+static void io_exit (void) {
+  lua_Object o = lua_getparam(1);
+  exit(lua_isnumber(o) ? (int)lua_getnumber(o) : 1);
+}
+
+/* }====================================================== */
+
+
+
+static void io_debug (void) {
+  for (;;) {
+    char buffer[250];
+    fprintf(stderr, "lua_debug> ");
+    if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
+        strcmp(buffer, "cont\n") == 0)
+      return;
+    lua_dostring(buffer);
+  }
+}
+
+
+
+#define MESSAGESIZE	150
+#define MAXMESSAGE	(MESSAGESIZE*10)
+
+
+#define MAXSRC		60
+
+
+static void errorfb (void) {
+  char buff[MAXMESSAGE];
+  int level = 1;  /* skip level 0 (it's this function) */
+  lua_Object func;
+  sprintf(buff, "lua error: %.200s\n", lua_getstring(lua_getparam(1)));
+  while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT) {
+    char *name;
+    int currentline;
+    char *chunkname;
+    char buffchunk[MAXSRC];
+    int linedefined;
+    lua_funcinfo(func, &chunkname, &linedefined);
+    luaL_chunkid(buffchunk, chunkname, sizeof(buffchunk));
+    if (level == 2) strcat(buff, "Active Stack:\n");
+    strcat(buff, "  ");
+    if (strlen(buff) > MAXMESSAGE-MESSAGESIZE) {
+      strcat(buff, "...\n");
+      break;  /* buffer is full */
+    }
+    switch (*lua_getobjname(func, &name)) {
+      case 'g':
+        sprintf(buff+strlen(buff), "function `%.50s'", name);
+        break;
+      case 't':
+        sprintf(buff+strlen(buff), "`%.50s' tag method", name);
+        break;
+      default: {
+        if (linedefined == 0)
+          sprintf(buff+strlen(buff), "main of %.70s", buffchunk);
+        else if (linedefined < 0)
+          sprintf(buff+strlen(buff), "%.70s", buffchunk);
+        else
+          sprintf(buff+strlen(buff), "function <%d:%.70s>",
+                  linedefined, buffchunk);
+        chunkname = NULL;
+      }
+    }
+    if ((currentline = lua_currentline(func)) > 0)
+      sprintf(buff+strlen(buff), " at line %d", currentline);
+    if (chunkname)
+      sprintf(buff+strlen(buff), " [%.70s]", buffchunk);
+    strcat(buff, "\n");
+  }
+  func = lua_rawgetglobal("_ALERT");
+  if (lua_isfunction(func)) {  /* avoid error loop if _ALERT is not defined */
+    lua_pushstring(buff);
+    lua_callfunction(func);
+  }
+}
+
+
+
+static struct luaL_reg iolib[] = {
+  {"_ERRORMESSAGE", errorfb},
+  {"clock",     io_clock},
+  {"date",     io_date},
+  {"debug",    io_debug},
+  {"execute",  io_execute},
+  {"exit",     io_exit},
+  {"getenv",   io_getenv},
+  {"remove",   io_remove},
+  {"rename",   io_rename},
+  {"setlocale", setloc},
+  {"tmpname",   io_tmpname}
+};
+
+
+static struct luaL_reg iolibtag[] = {
+  {"appendto", io_appendto},
+  {"closefile",   io_close},
+  {"flush",     io_flush},
+  {"openfile",   io_open},
+  {"read",     io_read},
+  {"readfrom", io_readfrom},
+  {"seek",     io_seek},
+  {"write",    io_write},
+  {"writeto",  io_writeto}
+};
+
+
+static void openwithtags (void) {
+  int i;
+  int iotag = lua_newtag();
+  lua_newtag();  /* alloc CLOSEDTAG: assume that CLOSEDTAG = iotag-1 */
+  for (i=0; i<sizeof(iolibtag)/sizeof(iolibtag[0]); i++) {
+    /* put iotag as upvalue for these functions */
+    lua_pushnumber(iotag);
+    lua_pushcclosure(iolibtag[i].func, 1);
+    lua_setglobal(iolibtag[i].name);
+  }
+  /* predefined file handles */
+  setfile(stdin, FINPUT, iotag);
+  setfile(stdout, FOUTPUT, iotag);
+  setfile(stdin, "_STDIN", iotag);
+  setfile(stdout, "_STDOUT", iotag);
+  setfile(stderr, "_STDERR", iotag);
+  /* close file when collected */
+  lua_pushnumber(iotag);
+  lua_pushcclosure(gc_close, 1); 
+  lua_settagmethod(iotag, "gc");
+}
+
+void lua_iolibopen (void) {
+  /* register lib functions */
+  luaL_openlib(iolib, (sizeof(iolib)/sizeof(iolib[0])));
+  openwithtags();
+}
+

llex.c

@@ -0,0 +1,437 @@
+/*
+** $Id: llex.c,v 1.35 1999/05/14 12:24:04 roberto Exp roberto $
+** Lexical Analyzer
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "llex.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lparser.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "luadebug.h"
+#include "lzio.h"
+
+
+
+#define next(LS) (LS->current = zgetc(LS->lex_z))
+
+
+#define save(c)	luaL_addchar(c)
+#define save_and_next(LS)  (save(LS->current), next(LS))
+
+
+char *reserved [] = {"and", "do", "else", "elseif", "end", "function",
+    "if", "local", "nil", "not", "or", "repeat", "return", "then",
+    "until", "while"};
+
+
+void luaX_init (void) {
+  int i;
+  for (i=0; i<(sizeof(reserved)/sizeof(reserved[0])); i++) {
+    TaggedString *ts = luaS_new(reserved[i]);
+    ts->head.marked = FIRST_RESERVED+i;  /* reserved word  (always > 255) */
+  }
+}
+
+
+#define MAXSRC          80
+
+void luaX_syntaxerror (LexState *ls, char *s, char *token) {
+  char buff[MAXSRC];
+  luaL_chunkid(buff, zname(ls->lex_z), sizeof(buff));
+  if (token[0] == '\0')
+    token = "<eof>";
+  luaL_verror("%.100s;\n  last token read: `%.50s' at line %d in %.80s",
+              s, token, ls->linenumber, buff);
+}
+
+
+void luaX_error (LexState *ls, char *s) {
+  save('\0');
+  luaX_syntaxerror(ls, s, luaL_buffer());
+}
+
+
+void luaX_token2str (int token, char *s) {
+  if (token < 255) {
+    s[0] = (char)token;
+    s[1] = '\0';
+  }
+  else
+    strcpy(s, reserved[token-FIRST_RESERVED]);
+}
+
+
+static void luaX_invalidchar (LexState *ls, int c) {
+  char buff[8];
+  sprintf(buff, "0x%02X", c);
+  luaX_syntaxerror(ls, "invalid control char", buff);
+}
+
+
+static void firstline (LexState *LS)
+{
+  int c = zgetc(LS->lex_z);
+  if (c == '#')
+    while ((c=zgetc(LS->lex_z)) != '\n' && c != EOZ) /* skip first line */;
+  zungetc(LS->lex_z);
+}
+
+
+void luaX_setinput (LexState *LS, ZIO *z)
+{
+  LS->current = '\n';
+  LS->linenumber = 0;
+  LS->iflevel = 0;
+  LS->ifstate[0].skip = 0;
+  LS->ifstate[0].elsepart = 1;  /* to avoid a free $else */
+  LS->lex_z = z;
+  LS->fs = NULL;
+  firstline(LS);
+  luaL_resetbuffer();
+}
+
+
+
+/*
+** =======================================================
+** PRAGMAS
+** =======================================================
+*/
+
+#ifndef PRAGMASIZE
+#define PRAGMASIZE	80  /* arbitrary limit */
+#endif
+
+static void skipspace (LexState *LS) {
+  while (LS->current == ' ' || LS->current == '\t' || LS->current == '\r')
+    next(LS);
+}
+
+
+static int checkcond (LexState *LS, char *buff) {
+  static char *opts[] = {"nil", "1", NULL};
+  int i = luaL_findstring(buff, opts);
+  if (i >= 0) return i;
+  else if (isalpha((unsigned char)buff[0]) || buff[0] == '_')
+    return luaS_globaldefined(buff);
+  else {
+    luaX_syntaxerror(LS, "invalid $if condition", buff);
+    return 0;  /* to avoid warnings */
+  }
+}
+
+
+static void readname (LexState *LS, char *buff) {
+  int i = 0;
+  skipspace(LS);
+  while (isalnum(LS->current) || LS->current == '_') {
+    if (i >= PRAGMASIZE) {
+      buff[PRAGMASIZE] = 0;
+      luaX_syntaxerror(LS, "pragma too long", buff);
+    }
+    buff[i++] = (char)LS->current;
+    next(LS);
+  }
+  buff[i] = 0;
+}
+
+
+static void inclinenumber (LexState *LS);
+
+
+static void ifskip (LexState *LS) {
+  while (LS->ifstate[LS->iflevel].skip) {
+    if (LS->current == '\n')
+      inclinenumber(LS);
+    else if (LS->current == EOZ)
+      luaX_error(LS, "input ends inside a $if");
+    else next(LS);
+  }
+}
+
+
+static void inclinenumber (LexState *LS) {
+  static char *pragmas [] =
+    {"debug", "nodebug", "endinput", "end", "ifnot", "if", "else", NULL};
+  next(LS);  /* skip '\n' */
+  ++LS->linenumber;
+  if (LS->current == '$') {  /* is a pragma? */
+    char buff[PRAGMASIZE+1];
+    int ifnot = 0;
+    int skip = LS->ifstate[LS->iflevel].skip;
+    next(LS);  /* skip $ */
+    readname(LS, buff);
+    switch (luaL_findstring(buff, pragmas)) {
+      case 0:  /* debug */
+        if (!skip) L->debug = 1;
+        break;
+      case 1:  /* nodebug */
+        if (!skip) L->debug = 0;
+        break;
+      case 2:  /* endinput */
+        if (!skip) {
+          LS->current = EOZ;
+          LS->iflevel = 0;  /* to allow $endinput inside a $if */
+        }
+        break;
+      case 3:  /* end */
+        if (LS->iflevel-- == 0)
+          luaX_syntaxerror(LS, "unmatched $end", "$end");
+        break;
+      case 4:  /* ifnot */
+        ifnot = 1;
+        /* go through */
+      case 5:  /* if */
+        if (LS->iflevel == MAX_IFS-1)
+          luaX_syntaxerror(LS, "too many nested $ifs", "$if");
+        readname(LS, buff);
+        LS->iflevel++;
+        LS->ifstate[LS->iflevel].elsepart = 0;
+        LS->ifstate[LS->iflevel].condition = checkcond(LS, buff) ? !ifnot : ifnot;
+        LS->ifstate[LS->iflevel].skip = skip || !LS->ifstate[LS->iflevel].condition;
+        break;
+      case 6:  /* else */
+        if (LS->ifstate[LS->iflevel].elsepart)
+          luaX_syntaxerror(LS, "unmatched $else", "$else");
+        LS->ifstate[LS->iflevel].elsepart = 1;
+        LS->ifstate[LS->iflevel].skip = LS->ifstate[LS->iflevel-1].skip ||
+                                      LS->ifstate[LS->iflevel].condition;
+        break;
+      default:
+        luaX_syntaxerror(LS, "unknown pragma", buff);
+    }
+    skipspace(LS);
+    if (LS->current == '\n')  /* pragma must end with a '\n' ... */
+      inclinenumber(LS);
+    else if (LS->current != EOZ)  /* or eof */
+      luaX_syntaxerror(LS, "invalid pragma format", buff);
+    ifskip(LS);
+  }
+}
+
+
+
+/*
+** =======================================================
+** LEXICAL ANALIZER
+** =======================================================
+*/
+
+
+
+static int read_long_string (LexState *LS) {
+  int cont = 0;
+  for (;;) {
+    switch (LS->current) {
+      case EOZ:
+        luaX_error(LS, "unfinished long string");
+        return EOS;  /* to avoid warnings */
+      case '[':
+        save_and_next(LS);
+        if (LS->current == '[') {
+          cont++;
+          save_and_next(LS);
+        }
+        continue;
+      case ']':
+        save_and_next(LS);
+        if (LS->current == ']') {
+          if (cont == 0) goto endloop;
+          cont--;
+          save_and_next(LS);
+        }
+        continue;
+      case '\n':
+        save('\n');
+        inclinenumber(LS);
+        continue;
+      default:
+        save_and_next(LS);
+    }
+  } endloop:
+  save_and_next(LS);  /* skip the second ']' */
+  LS->seminfo.ts = luaS_newlstr(L->Mbuffer+(L->Mbuffbase+2),
+                          L->Mbuffnext-L->Mbuffbase-4);
+  return STRING;
+}
+
+
+int luaX_lex (LexState *LS) {
+  luaL_resetbuffer();
+  for (;;) {
+    switch (LS->current) {
+
+      case ' ': case '\t': case '\r':  /* CR: to avoid problems with DOS */
+        next(LS);
+        continue;
+
+      case '\n':
+        inclinenumber(LS);
+        continue;
+
+      case '-':
+        save_and_next(LS);
+        if (LS->current != '-') return '-';
+        do { next(LS); } while (LS->current != '\n' && LS->current != EOZ);
+        luaL_resetbuffer();
+        continue;
+
+      case '[':
+        save_and_next(LS);
+        if (LS->current != '[') return '[';
+        else {
+          save_and_next(LS);  /* pass the second '[' */
+          return read_long_string(LS);
+        }
+
+      case '=':
+        save_and_next(LS);
+        if (LS->current != '=') return '=';
+        else { save_and_next(LS); return EQ; }
+
+      case '<':
+        save_and_next(LS);
+        if (LS->current != '=') return '<';
+        else { save_and_next(LS); return LE; }
+
+      case '>':
+        save_and_next(LS);
+        if (LS->current != '=') return '>';
+        else { save_and_next(LS); return GE; }
+
+      case '~':
+        save_and_next(LS);
+        if (LS->current != '=') return '~';
+        else { save_and_next(LS); return NE; }
+
+      case '"':
+      case '\'': {
+        int del = LS->current;
+        save_and_next(LS);
+        while (LS->current != del) {
+          switch (LS->current) {
+            case EOZ:
+            case '\n':
+              luaX_error(LS, "unfinished string");
+              return EOS;  /* to avoid warnings */
+            case '\\':
+              next(LS);  /* do not save the '\' */
+              switch (LS->current) {
+                case 'a': save('\a'); next(LS); break;
+                case 'b': save('\b'); next(LS); break;
+                case 'f': save('\f'); next(LS); break;
+                case 'n': save('\n'); next(LS); break;
+                case 'r': save('\r'); next(LS); break;
+                case 't': save('\t'); next(LS); break;
+                case 'v': save('\v'); next(LS); break;
+                case '\n': save('\n'); inclinenumber(LS); break;
+                default : {
+                  if (isdigit(LS->current)) {
+                    int c = 0;
+                    int i = 0;
+                    do {
+                      c = 10*c + (LS->current-'0');
+                      next(LS);
+                    } while (++i<3 && isdigit(LS->current));
+                    if (c != (unsigned char)c)
+                      luaX_error(LS, "escape sequence too large");
+                    save(c);
+                  }
+                  else {  /* handles \, ", ', and ? */
+                    save(LS->current);
+                    next(LS);
+                  }
+                  break;
+                }
+              }
+              break;
+            default:
+              save_and_next(LS);
+          }
+        }
+        save_and_next(LS);  /* skip delimiter */
+        LS->seminfo.ts = luaS_newlstr(L->Mbuffer+(L->Mbuffbase+1),
+                                L->Mbuffnext-L->Mbuffbase-2);
+        return STRING;
+      }
+
+      case '.':
+        save_and_next(LS);
+        if (LS->current == '.')
+        {
+          save_and_next(LS);
+          if (LS->current == '.')
+          {
+            save_and_next(LS);
+            return DOTS;   /* ... */
+          }
+          else return CONC;   /* .. */
+        }
+        else if (!isdigit(LS->current)) return '.';
+        goto fraction;  /* LS->current is a digit: goes through to number */
+
+      case '0': case '1': case '2': case '3': case '4':
+      case '5': case '6': case '7': case '8': case '9':
+        do {
+          save_and_next(LS);
+        } while (isdigit(LS->current));
+        if (LS->current == '.') {
+          save_and_next(LS);
+          if (LS->current == '.') {
+            save('.');
+            luaX_error(LS, 
+              "ambiguous syntax (decimal point x string concatenation)");
+          }
+        }
+      fraction:
+        while (isdigit(LS->current))
+          save_and_next(LS);
+        if (toupper(LS->current) == 'E') {
+          save_and_next(LS);  /* read 'E' */
+          save_and_next(LS);  /* read '+', '-' or first digit */
+          while (isdigit(LS->current))
+            save_and_next(LS);
+        }
+        save('\0');
+        LS->seminfo.r = luaO_str2d(L->Mbuffer+L->Mbuffbase);
+        if (LS->seminfo.r < 0)
+          luaX_error(LS, "invalid numeric format");
+        return NUMBER;
+
+      case EOZ:
+        if (LS->iflevel > 0)
+          luaX_error(LS, "input ends inside a $if");
+        return EOS;
+
+      default:
+        if (LS->current != '_' && !isalpha(LS->current)) {
+          int c = LS->current;
+          if (iscntrl(c))
+            luaX_invalidchar(LS, c);
+          save_and_next(LS);
+          return c;
+        }
+        else {  /* identifier or reserved word */
+          TaggedString *ts;
+          do {
+            save_and_next(LS);
+          } while (isalnum(LS->current) || LS->current == '_');
+          save('\0');
+          ts = luaS_new(L->Mbuffer+L->Mbuffbase);
+          if (ts->head.marked >= FIRST_RESERVED)
+            return ts->head.marked;  /* reserved word */
+          LS->seminfo.ts = ts;
+          return NAME;
+        }
+    }
+  }
+}
+

llex.h

@@ -0,0 +1,64 @@
+/*
+** $Id: llex.h,v 1.11 1999/02/25 19:13:56 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	260
+
+/* maximum length of a reserved word (+1 for terminal 0) */
+#define TOKEN_LEN	15
+
+enum RESERVED {
+  /* terminal symbols denoted by reserved words */
+  AND = FIRST_RESERVED,
+  DO, ELSE, ELSEIF, END, FUNCTION, IF, LOCAL, NIL, NOT, OR,
+  REPEAT, RETURN, THEN, UNTIL, WHILE,
+  /* other terminal symbols */
+  NAME, CONC, DOTS, EQ, GE, LE, NE, NUMBER, STRING, EOS};
+
+
+#ifndef MAX_IFS
+#define MAX_IFS 5  /* arbitrary limit */
+#endif
+
+/* "ifstate" keeps the state of each nested $if the lexical is dealing with. */
+
+struct ifState {
+  int elsepart;  /* true if it's in the $else part */
+  int condition;  /* true if $if condition is true */
+  int skip;  /* true if part must be skipped */
+};
+
+
+typedef struct LexState {
+  int current;  /* look ahead character */
+  int token;  /* look ahead token */
+  struct FuncState *fs;  /* 'FuncState' is private for the parser */
+  union {
+    real r;
+    TaggedString *ts;
+  } seminfo;  /* semantics information */
+  struct zio *lex_z;  /* input stream */
+  int linenumber;  /* input line counter */
+  int iflevel;  /* level of nested $if's (for lexical analysis) */
+  struct ifState ifstate[MAX_IFS];
+} LexState;
+
+
+void luaX_init (void);
+void luaX_setinput (LexState *LS, ZIO *z);
+int luaX_lex (LexState *LS);
+void luaX_syntaxerror (LexState *ls, char *s, char *token);
+void luaX_error (LexState *ls, char *s);
+void luaX_token2str (int token, char *s);
+
+
+#endif

lmathlib.c

@@ -0,0 +1,203 @@
+/*
+** $Id: lmathlib.c,v 1.16 1999/02/19 17:33:35 roberto Exp roberto $
+** Lua standard mathematical library
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+#include <math.h>
+
+#include "lauxlib.h"
+#include "lua.h"
+#include "lualib.h"
+
+
+#undef PI
+#define PI	(3.14159265358979323846)
+#define RADIANS_PER_DEGREE	(PI/180.0)
+
+
+
+/*
+** If you want Lua to operate in radians (instead of degrees),
+** define RADIANS
+*/
+#ifdef RADIANS
+#define FROMRAD(a)	(a)
+#define TORAD(a)	(a)
+#else
+#define FROMRAD(a)	((a)/RADIANS_PER_DEGREE)
+#define TORAD(a)	((a)*RADIANS_PER_DEGREE)
+#endif
+
+
+static void math_abs (void) {
+  lua_pushnumber(fabs(luaL_check_number(1)));
+}
+
+static void math_sin (void) {
+  lua_pushnumber(sin(TORAD(luaL_check_number(1))));
+}
+
+static void math_cos (void) {
+  lua_pushnumber(cos(TORAD(luaL_check_number(1))));
+}
+
+static void math_tan (void) {
+  lua_pushnumber(tan(TORAD(luaL_check_number(1))));
+}
+
+static void math_asin (void) {
+  lua_pushnumber(FROMRAD(asin(luaL_check_number(1))));
+}
+
+static void math_acos (void) {
+  lua_pushnumber(FROMRAD(acos(luaL_check_number(1))));
+}
+
+static void math_atan (void) {
+  lua_pushnumber(FROMRAD(atan(luaL_check_number(1))));
+}
+
+static void math_atan2 (void) {
+  lua_pushnumber(FROMRAD(atan2(luaL_check_number(1), luaL_check_number(2))));
+}
+
+static void math_ceil (void) {
+  lua_pushnumber(ceil(luaL_check_number(1)));
+}
+
+static void math_floor (void) {
+  lua_pushnumber(floor(luaL_check_number(1)));
+}
+
+static void math_mod (void) {
+  lua_pushnumber(fmod(luaL_check_number(1), luaL_check_number(2)));
+}
+
+static void math_sqrt (void) {
+  lua_pushnumber(sqrt(luaL_check_number(1)));
+}
+
+static void math_pow (void) {
+  lua_pushnumber(pow(luaL_check_number(1), luaL_check_number(2)));
+}
+
+static void math_log (void) {
+  lua_pushnumber(log(luaL_check_number(1)));
+}
+
+static void math_log10 (void) {
+  lua_pushnumber(log10(luaL_check_number(1)));
+}
+
+static void math_exp (void) {
+  lua_pushnumber(exp(luaL_check_number(1)));
+}
+
+static void math_deg (void) {
+  lua_pushnumber(luaL_check_number(1)/RADIANS_PER_DEGREE);
+}
+
+static void math_rad (void) {
+  lua_pushnumber(luaL_check_number(1)*RADIANS_PER_DEGREE);
+}
+
+static void math_frexp (void) {
+  int e;
+  lua_pushnumber(frexp(luaL_check_number(1), &e));
+  lua_pushnumber(e);
+}
+
+static void math_ldexp (void) {
+  lua_pushnumber(ldexp(luaL_check_number(1), luaL_check_int(2)));
+}
+
+
+
+static void math_min (void) {
+  int i = 1;
+  double dmin = luaL_check_number(i);
+  while (lua_getparam(++i) != LUA_NOOBJECT) {
+    double d = luaL_check_number(i);
+    if (d < dmin)
+      dmin = d;
+  }
+  lua_pushnumber(dmin);
+}
+
+
+static void math_max (void) {
+  int i = 1;
+  double dmax = luaL_check_number(i);
+  while (lua_getparam(++i) != LUA_NOOBJECT) {
+    double d = luaL_check_number(i);
+    if (d > dmax)
+      dmax = d;
+  }
+  lua_pushnumber(dmax);
+}
+
+
+static void math_random (void) {
+  /* the '%' avoids the (rare) case of r==1, and is needed also because on
+     some systems (SunOS!) "rand()" may return a value bigger than RAND_MAX */
+  double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
+  int l = luaL_opt_int(1, 0);
+  if (l == 0)
+    lua_pushnumber(r);
+  else {
+    int u = luaL_opt_int(2, 0);
+    if (u == 0) {
+      u = l;
+      l = 1;
+    }
+    luaL_arg_check(l<=u, 1, "interval is empty");
+    lua_pushnumber((int)(r*(u-l+1))+l);
+  }
+}
+
+
+static void math_randomseed (void) {
+  srand(luaL_check_int(1));
+}
+
+
+static struct luaL_reg mathlib[] = {
+{"abs",   math_abs},
+{"sin",   math_sin},
+{"cos",   math_cos},
+{"tan",   math_tan},
+{"asin",  math_asin},
+{"acos",  math_acos},
+{"atan",  math_atan},
+{"atan2", math_atan2},
+{"ceil",  math_ceil},
+{"floor", math_floor},
+{"mod",   math_mod},
+{"frexp", math_frexp},
+{"ldexp", math_ldexp},
+{"sqrt",  math_sqrt},
+{"min",   math_min},
+{"max",   math_max},
+{"log",   math_log},
+{"log10", math_log10},
+{"exp",   math_exp},
+{"deg",   math_deg},
+{"rad",   math_rad},
+{"random",     math_random},
+{"randomseed", math_randomseed}
+};
+
+/*
+** Open math library
+*/
+void lua_mathlibopen (void) {
+  luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
+  lua_pushcfunction(math_pow);
+  lua_pushnumber(0);  /* to get its tag */
+  lua_settagmethod(lua_tag(lua_pop()), "pow");
+  lua_pushnumber(PI); lua_setglobal("PI");
+}
+

lmem.c

@@ -0,0 +1,140 @@
+/*
+** $Id: lmem.c,v 1.16 1999/05/20 20:43:06 roberto Exp roberto $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdlib.h>
+
+#include "lmem.h"
+#include "lstate.h"
+#include "lua.h"
+
+
+/*
+** real ANSI systems do not need these tests;
+** but some systems (Sun OS) are not that ANSI...
+*/
+#ifdef OLD_ANSI
+#define realloc(b,s)	((b) == NULL ? malloc(s) : (realloc)(b, s))
+#define free(b)		if (b) (free)(b)
+#endif
+
+
+#define MINSIZE	8	/* minimum size for "growing" vectors */
+
+
+
+
+static unsigned long power2 (unsigned long n) {
+  unsigned long p = MINSIZE;
+  while (p<=n) p<<=1;
+  return p;
+}
+
+
+void *luaM_growaux (void *block, unsigned long nelems, int inc, int size,
+                       char *errormsg, unsigned long limit) {
+  unsigned long newn = nelems+inc;
+  if (newn >= limit) lua_error(errormsg);
+  if ((newn ^ nelems) <= nelems ||  /* still the same power of 2 limit? */
+       (nelems > 0 && newn < MINSIZE))  /* or block already is MINSIZE? */
+      return block;  /* do not need to reallocate */
+  else  /* it crossed a power of 2 boundary; grow to next power */
+    return luaM_realloc(block, power2(newn)*size);
+}
+
+
+#ifndef DEBUG
+
+/*
+** generic allocation routine.
+*/
+void *luaM_realloc (void *block, unsigned long size) {
+  size_t s = (size_t)size;
+  if (s != size)
+    lua_error("memory allocation error: block too big");
+  if (size == 0) {
+    free(block);  /* block may be NULL, that is OK for free */
+    return NULL;
+  }
+  block = realloc(block, s);
+  if (block == NULL)
+    lua_error(memEM);
+  return block;
+}
+
+
+
+#else
+/* DEBUG */
+
+#include <string.h>
+
+
+#define HEADER	(sizeof(double))
+#define MARKSIZE	16
+
+#define MARK    55
+
+
+#define blocksize(b)	((unsigned long *)((char *)(b) - HEADER))
+
+unsigned long numblocks = 0;
+unsigned long totalmem = 0;
+
+
+static void *checkblock (void *block) {
+  if (block == NULL)
+    return NULL;
+  else {
+    unsigned long *b = blocksize(block);
+    unsigned long size = *b;
+    int i;
+    for (i=0;i<MARKSIZE;i++)
+      LUA_ASSERT(*(((char *)b)+HEADER+size+i) == MARK+i, "corrupted block");
+    numblocks--;
+    totalmem -= size;
+    return b;
+  }
+}
+
+
+static void freeblock (void *block) {
+  if (block)
+    memset(block, -1, *blocksize(block));  /* erase block */
+  free(checkblock(block));
+}
+
+
+void *luaM_realloc (void *block, unsigned long size) {
+  unsigned long realsize = HEADER+size+MARKSIZE;
+  if (realsize != (size_t)realsize)
+    lua_error("memory allocation error: block too big");
+  if (size == 0) {
+    freeblock(block);
+    return NULL;
+  }
+  else {
+    char *newblock = malloc(realsize);
+    int i;
+    if (block) {
+      unsigned long oldsize = *blocksize(block);
+      if (oldsize > size) oldsize = size;
+      memcpy(newblock+HEADER, block, oldsize);
+      freeblock(block);  /* erase (and check) old copy */
+    }
+    if (newblock == NULL)
+      lua_error(memEM);
+    totalmem += size;
+    numblocks++;
+    *(unsigned long *)newblock = size;
+    for (i=0;i<MARKSIZE;i++)
+      *(newblock+HEADER+size+i) = MARK+i;
+    return newblock+HEADER;
+  }
+}
+
+
+#endif

lmem.h

@@ -0,0 +1,41 @@
+/*
+** $Id: lmem.h,v 1.7 1999/02/25 15:16:26 roberto Exp roberto $
+** Interface to Memory Manager
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lmem_h
+#define lmem_h
+
+
+#include <stdlib.h>
+
+/* memory error messages */
+#define codeEM   "code size overflow"
+#define constantEM   "constant table overflow"
+#define refEM   "reference table overflow"
+#define tableEM  "table overflow"
+#define memEM "not enough memory"
+#define arrEM	"internal array bigger than `int' limit"
+
+void *luaM_realloc (void *oldblock, unsigned long size);
+void *luaM_growaux (void *block, unsigned long nelems, int inc, int size,
+                       char *errormsg, unsigned long limit);
+
+#define luaM_free(b)	luaM_realloc((b), 0)
+#define luaM_malloc(t)	luaM_realloc(NULL, (t))
+#define luaM_new(t)          ((t *)luaM_malloc(sizeof(t)))
+#define luaM_newvector(n,t)  ((t *)luaM_malloc((n)*sizeof(t)))
+#define luaM_growvector(v,nelems,inc,t,e,l) \
+          ((v)=(t *)luaM_growaux(v,nelems,inc,sizeof(t),e,l))
+#define luaM_reallocvector(v,n,t) ((v)=(t *)luaM_realloc(v,(n)*sizeof(t)))
+
+
+#ifdef DEBUG
+extern unsigned long numblocks;
+extern unsigned long totalmem;
+#endif
+
+
+#endif
+

lobject.c

@@ -0,0 +1,129 @@
+/*
+** $Id: lobject.c,v 1.18 1999/02/26 15:48:30 roberto Exp roberto $
+** Some generic functions over Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "lobject.h"
+#include "lua.h"
+
+
+char *luaO_typenames[] = { /* ORDER LUA_T */
+    "userdata", "number", "string", "table", "function", "function",
+    "nil", "function", "mark", "mark", "mark", "line", NULL
+};
+
+
+TObject luaO_nilobject = {LUA_T_NIL, {NULL}};
+
+
+
+/* hash dimensions values */
+static long dimensions[] =
+ {5L, 11L, 23L, 47L, 97L, 197L, 397L, 797L, 1597L, 3203L, 6421L,
+  12853L, 25717L, 51437L, 102811L, 205619L, 411233L, 822433L,
+  1644817L, 3289613L, 6579211L, 13158023L, MAX_INT};
+
+
+int luaO_redimension (int oldsize)
+{
+  int i;
+  for (i=0; dimensions[i]<MAX_INT; i++) {
+    if (dimensions[i] > oldsize)
+      return dimensions[i];
+  }
+  lua_error("tableEM");
+  return 0;  /* to avoid warnings */
+}
+
+
+int luaO_equalval (TObject *t1, TObject *t2) {
+  switch (ttype(t1)) {
+    case LUA_T_NIL: return 1;
+    case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
+    case LUA_T_STRING: case LUA_T_USERDATA: return svalue(t1) == svalue(t2);
+    case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
+    case LUA_T_PROTO: return tfvalue(t1)  == tfvalue(t2);
+    case LUA_T_CPROTO: return fvalue(t1)  == fvalue(t2);
+    case LUA_T_CLOSURE: return t1->value.cl == t2->value.cl;
+    default:
+     LUA_INTERNALERROR("invalid type");
+     return 0; /* UNREACHABLE */
+  }
+}
+
+
+void luaO_insertlist (GCnode *root, GCnode *node)
+{
+  node->next = root->next;
+  root->next = node;
+  node->marked = 0;
+}
+
+
+#ifdef OLD_ANSI
+void luaO_memup (void *dest, void *src, int size) {
+  while (size--)
+    ((char *)dest)[size]=((char *)src)[size];
+}
+
+void luaO_memdown (void *dest, void *src, int size) {
+  int i;
+  for (i=0; i<size; i++)
+    ((char *)dest)[i]=((char *)src)[i];
+}
+#endif
+
+
+
+static double expten (unsigned int e) {
+  double exp = 10.0;
+  double res = 1.0;
+  for (; e; e>>=1) {
+    if (e & 1) res *= exp;
+    exp *= exp;
+  }
+  return res;
+}
+
+
+double luaO_str2d (char *s) {  /* LUA_NUMBER */
+  double a = 0.0;
+  int point = 0;
+  while (isdigit((unsigned char)*s)) {
+    a = 10.0*a + (*(s++)-'0');
+  }
+  if (*s == '.') {
+    s++;
+    while (isdigit((unsigned char)*s)) {
+      a = 10.0*a + (*(s++)-'0');
+      point++;
+    }
+  }
+  if (toupper((unsigned char)*s) == 'E') {
+    int e = 0;
+    int sig = 1;
+    s++;
+    if (*s == '-') {
+      s++;
+      sig = -1;
+    }
+    else if (*s == '+') s++;
+    if (!isdigit((unsigned char)*s)) return -1;  /* no digit in the exponent? */
+    do {
+      e = 10*e + (*(s++)-'0');
+    } while (isdigit((unsigned char)*s));
+    point -= sig*e;
+  }
+  while (isspace((unsigned char)*s)) s++;
+  if (*s != '\0') return -1;  /* invalid trailing characters? */
+  if (point > 0)
+    a /= expten(point);
+  else if (point < 0)
+    a *= expten(-point);
+  return a;
+}
+

lobject.h

@@ -0,0 +1,204 @@
+/*
+** $Id: lobject.h,v 1.27 1999/03/04 21:17:26 roberto Exp roberto $
+** Type definitions for Lua objects
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lobject_h
+#define lobject_h
+
+
+#include <limits.h>
+
+#include "lua.h"
+
+
+#ifdef DEBUG
+#include "lauxlib.h"
+#define LUA_INTERNALERROR(s)	\
+	luaL_verror("INTERNAL ERROR - %s [%s:%d]",(s),__FILE__,__LINE__)
+#define LUA_ASSERT(c,s) { if (!(c)) LUA_INTERNALERROR(s); }
+#else
+#define LUA_INTERNALERROR(s)  /* empty */
+#define LUA_ASSERT(c,s)  /* empty */
+#endif
+
+
+/*
+** "real" is the type "number" of Lua
+** GREP LUA_NUMBER to change that
+*/
+#ifndef LUA_NUM_TYPE
+#define LUA_NUM_TYPE double
+#endif
+
+
+typedef LUA_NUM_TYPE real;
+
+#define Byte lua_Byte	/* some systems have Byte as a predefined type */
+typedef unsigned char  Byte;  /* unsigned 8 bits */
+
+
+#define MAX_INT   (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
+
+typedef unsigned int IntPoint; /* unsigned with same size as a pointer (for hashing) */
+
+
+/*
+** Lua TYPES
+** WARNING: if you change the order of this enumeration,
+** grep "ORDER LUA_T"
+*/
+typedef enum {
+  LUA_T_USERDATA =  0,  /* tag default for userdata */
+  LUA_T_NUMBER   = -1,  /* fixed tag for numbers */
+  LUA_T_STRING   = -2,  /* fixed tag for strings */
+  LUA_T_ARRAY    = -3,  /* tag default for tables (or arrays) */
+  LUA_T_PROTO    = -4,  /* fixed tag for functions */
+  LUA_T_CPROTO   = -5,  /* fixed tag for Cfunctions */
+  LUA_T_NIL      = -6,  /* last "pre-defined" tag */
+  LUA_T_CLOSURE  = -7,
+  LUA_T_CLMARK   = -8,  /* mark for closures */
+  LUA_T_PMARK    = -9,  /* mark for Lua prototypes */
+  LUA_T_CMARK    = -10, /* mark for C prototypes */
+  LUA_T_LINE     = -11
+} lua_Type;
+
+#define NUM_TAGS  7
+
+
+typedef union {
+  lua_CFunction f;  /* LUA_T_CPROTO, LUA_T_CMARK */
+  real n;  /* LUA_T_NUMBER */
+  struct TaggedString *ts;  /* LUA_T_STRING, LUA_T_USERDATA */
+  struct TProtoFunc *tf;  /* LUA_T_PROTO, LUA_T_PMARK */
+  struct Closure *cl;  /* LUA_T_CLOSURE, LUA_T_CLMARK */
+  struct Hash *a;  /* LUA_T_ARRAY */
+  int i;  /* LUA_T_LINE */
+} Value;
+
+
+typedef struct TObject {
+  lua_Type ttype;
+  Value value;
+} TObject;
+
+
+
+/*
+** generic header for garbage collector lists
+*/
+typedef struct GCnode {
+  struct GCnode *next;
+  int marked;
+} GCnode;
+
+
+/*
+** String headers for string table
+*/
+
+typedef struct TaggedString {
+  GCnode head;
+  unsigned long hash;
+  int constindex;  /* hint to reuse constants (= -1 if this is a userdata) */
+  union {
+    struct {
+      TObject globalval;
+      long len;  /* if this is a string, here is its length */
+    } s;
+    struct {
+      int tag;
+      void *v;  /* if this is a userdata, here is its value */
+    } d;
+  } u;
+  char str[1];   /* \0 byte already reserved */
+} TaggedString;
+
+
+
+
+/*
+** Function Prototypes
+*/
+typedef struct TProtoFunc {
+  GCnode head;
+  struct TObject *consts;
+  int nconsts;
+  Byte *code;  /* ends with opcode ENDCODE */
+  int lineDefined;
+  TaggedString  *source;
+  struct LocVar *locvars;  /* ends with line = -1 */
+} TProtoFunc;
+
+typedef struct LocVar {
+  TaggedString *varname;           /* NULL signals end of scope */
+  int line;
+} LocVar;
+
+
+
+
+
+/* Macros to access structure members */
+#define ttype(o)        ((o)->ttype)
+#define nvalue(o)       ((o)->value.n)
+#define svalue(o)       ((o)->value.ts->str)
+#define tsvalue(o)      ((o)->value.ts)
+#define clvalue(o)      ((o)->value.cl)
+#define avalue(o)       ((o)->value.a)
+#define fvalue(o)       ((o)->value.f)
+#define tfvalue(o)	((o)->value.tf)
+
+#define protovalue(o)	((o)->value.cl->consts)
+
+
+/*
+** Closures
+*/
+typedef struct Closure {
+  GCnode head;
+  int nelems;  /* not included the first one (always the prototype) */
+  TObject consts[1];  /* at least one for prototype */
+} Closure;
+
+
+
+typedef struct node {
+  TObject ref;
+  TObject val;
+} Node;
+
+typedef struct Hash {
+  GCnode head;
+  Node *node;
+  int nhash;
+  int nuse;
+  int htag;
+} Hash;
+
+
+extern char *luaO_typenames[];
+
+#define luaO_typename(o)        luaO_typenames[-ttype(o)]
+
+
+extern TObject luaO_nilobject;
+
+#define luaO_equalObj(t1,t2)	((ttype(t1) != ttype(t2)) ? 0 \
+                                      : luaO_equalval(t1,t2))
+int luaO_equalval (TObject *t1, TObject *t2);
+int luaO_redimension (int oldsize);
+void luaO_insertlist (GCnode *root, GCnode *node);
+double luaO_str2d (char *s);
+
+#ifdef OLD_ANSI
+void luaO_memup (void *dest, void *src, int size);
+void luaO_memdown (void *dest, void *src, int size);
+#else
+#include <string.h>
+#define luaO_memup(d,s,n)	memmove(d,s,n)
+#define luaO_memdown(d,s,n)	memmove(d,s,n)
+#endif
+
+#endif

lopcodes.h

@@ -0,0 +1,138 @@
+/*
+** $Id: lopcodes.h,v 1.32 1999/03/10 14:09:45 roberto Exp roberto $
+** Opcodes for Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lopcodes_h
+#define lopcodes_h
+
+
+/*
+** NOTICE: variants of the same opcode must be consecutive: First, those
+** with word parameter, then with byte parameter.
+*/
+
+
+typedef enum {
+/* name          parm    before          after           side effect
+-----------------------------------------------------------------------------*/
+ENDCODE,/*	-	-		(return)			*/
+RETCODE,/*	b	-		(return)			*/
+
+CALL,/*		b c	v_c...v_1 f	r_b...r_1	f(v1,...,v_c)	*/
+
+TAILCALL,/*	b c	v_c...v_1 f	(return)	f(v1,...,v_c)	*/
+
+PUSHNIL,/*	b	-		nil_0...nil_b			*/
+POP,/*		b	a_b...a_1	-				*/
+
+PUSHNUMBERW,/*	w	-		(float)w			*/
+PUSHNUMBER,/*	b	-		(float)b			*/
+
+PUSHNUMBERNEGW,/* w	-		(float)-w			*/
+PUSHNUMBERNEG,/* b	-		(float)-b			*/
+
+PUSHCONSTANTW,/*w	-		CNST[w]				*/
+PUSHCONSTANT,/*	b	-		CNST[b]				*/
+
+PUSHUPVALUE,/*	b	-		Closure[b]			*/
+
+PUSHLOCAL,/*	b	-		LOC[b]				*/
+
+GETGLOBALW,/*	w	-		VAR[CNST[w]]			*/
+GETGLOBAL,/*	b	-		VAR[CNST[b]]			*/
+
+GETTABLE,/*	-	i t		t[i]				*/
+
+GETDOTTEDW,/*	w	t		t[CNST[w]]			*/
+GETDOTTED,/*	b	t		t[CNST[b]]			*/
+
+PUSHSELFW,/*	w	t		t t[CNST[w]]			*/
+PUSHSELF,/*	b	t		t t[CNST[b]]			*/
+
+CREATEARRAYW,/*	w	-		newarray(size = w)		*/
+CREATEARRAY,/*	b	-		newarray(size = b)		*/
+
+SETLOCAL,/*	b	x		-		LOC[b]=x	*/
+
+SETGLOBALW,/*	w	x		-		VAR[CNST[w]]=x	*/
+SETGLOBAL,/*	b	x		-		VAR[CNST[b]]=x	*/
+
+SETTABLEPOP,/*	-	v i t		-		t[i]=v		*/
+
+SETTABLE,/*	b	v a_b...a_1 i t	 a_b...a_1 i t	  t[i]=v	*/
+
+SETLISTW,/*	w c	v_c...v_1 t	t		t[i+w*FPF]=v_i	*/
+SETLIST,/*	b c	v_c...v_1 t	t		t[i+b*FPF]=v_i	*/
+
+SETMAP,/*	b	v_b k_b ...v_0 k_0 t	t	t[k_i]=v_i	*/
+
+NEQOP,/*	-	y x		(x~=y)? 1 : nil			*/
+EQOP,/*		-	y x		(x==y)? 1 : nil			*/
+LTOP,/*		-	y x		(x<y)? 1 : nil			*/
+LEOP,/*		-	y x		(x<y)? 1 : nil			*/
+GTOP,/*		-	y x		(x>y)? 1 : nil			*/
+GEOP,/*		-	y x		(x>=y)? 1 : nil			*/
+ADDOP,/*	-	y x		x+y				*/
+SUBOP,/*	-	y x		x-y				*/
+MULTOP,/*	-	y x		x*y				*/
+DIVOP,/*	-	y x		x/y				*/
+POWOP,/*	-	y x		x^y				*/
+CONCOP,/*	-	y x		x..y				*/
+MINUSOP,/*	-	x		-x				*/
+NOTOP,/*	-	x		(x==nil)? 1 : nil		*/
+
+ONTJMPW,/*	w	x		(x!=nil)? x : -	(x!=nil)? PC+=w	*/
+ONTJMP,/*	b	x		(x!=nil)? x : -	(x!=nil)? PC+=b	*/
+ONFJMPW,/*	w	x		(x==nil)? x : -	(x==nil)? PC+=w	*/
+ONFJMP,/*	b	x		(x==nil)? x : -	(x==nil)? PC+=b	*/
+JMPW,/*		w	-		-		PC+=w		*/
+JMP,/*		b	-		-		PC+=b		*/
+IFFJMPW,/*	w	x		-		(x==nil)? PC+=w	*/
+IFFJMP,/*	b	x		-		(x==nil)? PC+=b	*/
+IFTUPJMPW,/*	w	x		-		(x!=nil)? PC-=w	*/
+IFTUPJMP,/*	b	x		-		(x!=nil)? PC-=b	*/
+IFFUPJMPW,/*	w	x		-		(x==nil)? PC-=w	*/
+IFFUPJMP,/*	b	x		-		(x==nil)? PC-=b	*/
+
+CLOSUREW,/*	w c	v_c...v_1	closure(CNST[w], v_c...v_1)	*/
+CLOSURE,/*	b c	v_c...v_1	closure(CNST[b], v_c...v_1)	*/
+
+SETLINEW,/*	w	-		-		LINE=w		*/
+SETLINE,/*	b	-		-		LINE=b		*/
+
+LONGARGW,/*	w	(add w*(1<<16) to arg of next instruction)	*/
+LONGARG,/*	b	(add b*(1<<16) to arg of next instruction)	*/
+
+CHECKSTACK /*	b  (assert #temporaries == b; only for internal debuging!) */
+
+} OpCode;
+
+
+#define RFIELDS_PER_FLUSH 32	/* records (SETMAP) */
+#define LFIELDS_PER_FLUSH 64    /* FPF - lists (SETLIST) */
+
+#define ZEROVARARG	128
+
+
+/* maximum value of an arg of 3 bytes; must fit in an "int" */
+#if MAX_INT < (1<<24)
+#define MAX_ARG	MAX_INT
+#else
+#define MAX_ARG	((1<<24)-1)
+#endif
+
+/* maximum value of a word of 2 bytes; cannot be bigger than MAX_ARG */
+#if MAX_ARG < (1<<16)
+#define MAX_WORD	MAX_ARG
+#else
+#define MAX_WORD	((1<<16)-1)
+#endif
+
+
+/* maximum value of a byte */
+#define MAX_BYTE	((1<<8)-1)
+
+
+#endif

lparser.h

@@ -0,0 +1,20 @@
+/*
+** $Id: lparser.h,v 1.2 1997/12/22 20:57:18 roberto Exp roberto $
+** LL(1) Parser and code generator for Lua
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lparser_h
+#define lparser_h
+
+#include "lobject.h"
+#include "lzio.h"
+
+
+void luaY_codedebugline (int line);
+TProtoFunc *luaY_parser (ZIO *z);
+void luaY_error (char *s);
+void luaY_syntaxerror (char *s, char *token);
+
+
+#endif

lstate.c

@@ -0,0 +1,86 @@
+/*
+** $Id: lstate.c,v 1.11 1999/05/11 14:19:32 roberto Exp roberto $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+
+#include "lbuiltin.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"
+
+
+lua_State *lua_state = NULL;
+
+
+void lua_open (void)
+{
+  if (lua_state) return;
+  lua_state = luaM_new(lua_State);
+  L->Cstack.base = 0;
+  L->Cstack.lua2C = 0;
+  L->Cstack.num = 0;
+  L->errorJmp = NULL;
+  L->Mbuffer = NULL;
+  L->Mbuffbase = 0;
+  L->Mbuffsize = 0;
+  L->Mbuffnext = 0;
+  L->Cblocks = NULL;
+  L->numCblocks = 0;
+  L->debug = 0;
+  L->callhook = NULL;
+  L->linehook = NULL;
+  L->rootproto.next = NULL;
+  L->rootproto.marked = 0;
+  L->rootcl.next = NULL;
+  L->rootcl.marked = 0;
+  L->rootglobal.next = NULL;
+  L->rootglobal.marked = 0;
+  L->roottable.next = NULL;
+  L->roottable.marked = 0;
+  L->IMtable = NULL;
+  L->refArray = NULL;
+  L->refSize = 0;
+  L->GCthreshold = GARBAGE_BLOCK;
+  L->nblocks = 0;
+  luaD_init();
+  luaS_init();
+  luaX_init();
+  luaT_init();
+  luaB_predefine();
+}
+
+
+void lua_close (void)
+{
+  TaggedString *alludata = luaS_collectudata();
+  L->GCthreshold = MAX_INT;  /* to avoid GC during GC */
+  luaC_hashcallIM((Hash *)L->roottable.next);  /* GC t.methods for tables */
+  luaC_strcallIM(alludata);  /* GC tag methods for userdata */
+  luaD_gcIM(&luaO_nilobject);  /* GC tag method for nil (signal end of GC) */
+  luaH_free((Hash *)L->roottable.next);
+  luaF_freeproto((TProtoFunc *)L->rootproto.next);
+  luaF_freeclosure((Closure *)L->rootcl.next);
+  luaS_free(alludata);
+  luaS_freeall();
+  luaM_free(L->stack.stack);
+  luaM_free(L->IMtable);
+  luaM_free(L->refArray);
+  luaM_free(L->Mbuffer);
+  luaM_free(L->Cblocks);
+  luaM_free(L);
+  L = NULL;
+#ifdef DEBUG
+  printf("total de blocos: %ld\n", numblocks);
+  printf("total de memoria: %ld\n", totalmem);
+#endif
+}
+
+

lstate.h

@@ -0,0 +1,94 @@
+/*
+** $Id: lstate.h,v 1.18 1999/05/11 14:19:32 roberto Exp roberto $
+** Global State
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstate_h
+#define lstate_h
+
+#include <setjmp.h>
+
+#include "lobject.h"
+#include "lua.h"
+#include "luadebug.h"
+
+
+#define GARBAGE_BLOCK 150
+
+
+typedef int StkId;  /* index to stack elements */
+
+
+/*
+** "jmp_buf" may be an array, so it is better to make sure it has an
+** address (and not that it *is* an address...)
+*/
+struct lua_longjmp {
+  jmp_buf b;
+};
+
+
+struct Stack {
+  TObject *top;
+  TObject *stack;
+  TObject *last;
+};
+
+struct C_Lua_Stack {
+  StkId base;  /* when Lua calls C or C calls Lua, points to */
+               /* the first slot after the last parameter. */
+  StkId lua2C; /* points to first element of "array" lua2C */
+  int num;     /* size of "array" lua2C */
+};
+
+
+typedef struct stringtable {
+  int size;
+  int nuse;  /* number of elements (including EMPTYs) */
+  TaggedString **hash;
+} stringtable;
+
+
+enum Status {LOCK, HOLD, FREE, COLLECTED};
+
+struct ref {
+  TObject o;
+  enum Status status;
+};
+
+
+struct lua_State {
+  /* thread-specific state */
+  struct Stack stack;  /* Lua stack */
+  struct C_Lua_Stack Cstack;  /* C2lua struct */
+  struct lua_longjmp *errorJmp;  /* current error recover point */
+  char *Mbuffer;  /* global buffer */
+  int Mbuffbase;  /* current first position of Mbuffer */
+  int Mbuffsize;  /* size of Mbuffer */
+  int Mbuffnext;  /* next position to fill in Mbuffer */
+  struct C_Lua_Stack *Cblocks;
+  int numCblocks;  /* number of nested Cblocks */
+  int debug;
+  lua_CHFunction callhook;
+  lua_LHFunction linehook;
+  /* global state */
+  GCnode rootproto;  /* list of all prototypes */
+  GCnode rootcl;  /* list of all closures */
+  GCnode roottable;  /* list of all tables */
+  GCnode rootglobal;  /* list of strings with global values */
+  stringtable *string_root;  /* array of hash tables for strings and udata */
+  struct IM *IMtable;  /* table for tag methods */
+  int last_tag;  /* last used tag in IMtable */
+  struct ref *refArray;  /* locked objects */
+  int refSize;  /* size of refArray */
+  unsigned long GCthreshold;
+  unsigned long nblocks;  /* number of 'blocks' currently allocated */
+};
+
+
+#define L	lua_state
+
+
+#endif
+

lstring.c

@@ -0,0 +1,298 @@
+/*
+** $Id: lstring.c,v 1.18 1999/02/08 16:28:48 roberto Exp roberto $
+** String table (keeps all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+
+#include <string.h>
+
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "lua.h"
+
+
+#define NUM_HASHSTR	31
+#define NUM_HASHUDATA	31
+#define NUM_HASHS  (NUM_HASHSTR+NUM_HASHUDATA)
+
+
+#define gcsizestring(l)	(1+(l/64))  /* "weight" for a string with length 'l' */
+
+
+
+static TaggedString EMPTY = {{NULL, 2}, 0L, 0,
+                            {{{LUA_T_NIL, {NULL}}, 0L}}, {0}};
+
+
+void luaS_init (void) {
+  int i;
+  L->string_root = luaM_newvector(NUM_HASHS, stringtable);
+  for (i=0; i<NUM_HASHS; i++) {
+    L->string_root[i].size = 0;
+    L->string_root[i].nuse = 0;
+    L->string_root[i].hash = NULL;
+  }
+}
+
+
+static unsigned long hash_s (char *s, long l) {
+  unsigned long h = 0;  /* seed */
+  while (l--)
+      h = h ^ ((h<<5)+(h>>2)+(unsigned char)*(s++));
+  return h;
+}
+
+static int newsize (stringtable *tb) {
+  int size = tb->size;
+  int realuse = 0;
+  int i;
+  /* count how many entries are really in use */
+  for (i=0; i<size; i++)
+    if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY)
+      realuse++;
+  return luaO_redimension((realuse+1)*2);  /* +1 is the new element */
+}
+
+
+static void grow (stringtable *tb) {
+  int ns = newsize(tb);
+  TaggedString **newhash = luaM_newvector(ns, TaggedString *);
+  int i;
+  for (i=0; i<ns; i++)
+    newhash[i] = NULL;
+  /* rehash */
+  tb->nuse = 0;
+  for (i=0; i<tb->size; i++) {
+    if (tb->hash[i] != NULL && tb->hash[i] != &EMPTY) {
+      unsigned long h = tb->hash[i]->hash;
+      int h1 = h%ns;
+      while (newhash[h1]) {
+        h1 += (h&(ns-2)) + 1;  /* double hashing */
+        if (h1 >= ns) h1 -= ns;
+      }
+      newhash[h1] = tb->hash[i];
+      tb->nuse++;
+    }
+  }
+  luaM_free(tb->hash);
+  tb->size = ns;
+  tb->hash = newhash;
+}
+
+
+static TaggedString *newone_s (char *str, long l, unsigned long h) {
+  TaggedString *ts = (TaggedString *)luaM_malloc(sizeof(TaggedString)+l);
+  memcpy(ts->str, str, l);
+  ts->str[l] = 0;  /* ending 0 */
+  ts->u.s.globalval.ttype = LUA_T_NIL;  /* initialize global value */
+  ts->u.s.len = l;
+  ts->constindex = 0;
+  L->nblocks += gcsizestring(l);
+  ts->head.marked = 0;
+  ts->head.next = (GCnode *)ts;  /* signal it is in no list */
+  ts->hash = h;
+  return ts;
+}
+
+static TaggedString *newone_u (char *buff, int tag, unsigned long h) {
+  TaggedString *ts = luaM_new(TaggedString);
+  ts->u.d.v = buff;
+  ts->u.d.tag = (tag == LUA_ANYTAG) ? 0 : tag;
+  ts->constindex = -1;  /* tag -> this is a userdata */
+  L->nblocks++;
+  ts->head.marked = 0;
+  ts->head.next = (GCnode *)ts;  /* signal it is in no list */
+  ts->hash = h;
+  return ts;
+}
+
+static TaggedString *insert_s (char *str, long l, stringtable *tb) {
+  TaggedString *ts;
+  unsigned long h = hash_s(str, l);
+  int size = tb->size;
+  int j = -1;
+  int h1;
+  if ((long)tb->nuse*3 >= (long)size*2) {
+    grow(tb);
+    size = tb->size;
+  }
+  h1 = h%size;
+  while ((ts = tb->hash[h1]) != NULL) {
+    if (ts == &EMPTY)
+      j = h1;
+    else if (ts->u.s.len == l && (memcmp(str, ts->str, l) == 0))
+      return ts;
+    h1 += (h&(size-2)) + 1;  /* double hashing */
+    if (h1 >= size) h1 -= size;
+  }
+  /* not found */
+  if (j != -1)  /* is there an EMPTY space? */
+    h1 = j;
+  else
+    tb->nuse++;
+  ts = tb->hash[h1] = newone_s(str, l, h);
+  return ts;
+}
+
+
+static TaggedString *insert_u (void *buff, int tag, stringtable *tb) {
+  TaggedString *ts;
+  unsigned long h = (unsigned long)buff;
+  int size = tb->size;
+  int j = -1;
+  int h1;
+  if ((long)tb->nuse*3 >= (long)size*2) {
+    grow(tb);
+    size = tb->size;
+  }
+  h1 = h%size;
+  while ((ts = tb->hash[h1]) != NULL) {
+    if (ts == &EMPTY)
+      j = h1;
+    else if ((tag == ts->u.d.tag || tag == LUA_ANYTAG) && buff == ts->u.d.v)
+      return ts;
+    h1 += (h&(size-2)) + 1;  /* double hashing */
+    if (h1 >= size) h1 -= size;
+  }
+  /* not found */
+  if (j != -1)  /* is there an EMPTY space? */
+    h1 = j;
+  else
+    tb->nuse++;
+  ts = tb->hash[h1] = newone_u(buff, tag, h);
+  return ts;
+}
+
+
+TaggedString *luaS_createudata (void *udata, int tag) {
+  int t = ((unsigned)udata%NUM_HASHUDATA)+NUM_HASHSTR;
+  return insert_u(udata, tag, &L->string_root[t]);
+}
+
+TaggedString *luaS_newlstr (char *str, long l) {
+  int t = (l==0) ? 0 : ((int)((unsigned char)str[0]*l))%NUM_HASHSTR;
+  return insert_s(str, l, &L->string_root[t]);
+}
+
+TaggedString *luaS_new (char *str) {
+  return luaS_newlstr(str, strlen(str));
+}
+
+TaggedString *luaS_newfixedstring (char *str) {
+  TaggedString *ts = luaS_new(str);
+  if (ts->head.marked == 0)
+    ts->head.marked = 2;  /* avoid GC */
+  return ts;
+}
+
+
+void luaS_free (TaggedString *l) {
+  while (l) {
+    TaggedString *next = (TaggedString *)l->head.next;
+    L->nblocks -= (l->constindex == -1) ? 1 : gcsizestring(l->u.s.len);
+    luaM_free(l);
+    l = next;
+  }
+}
+
+
+/*
+** Garbage collection functions.
+*/
+
+static void remove_from_list (GCnode *l) {
+  while (l) {
+    GCnode *next = l->next;
+    while (next && !next->marked)
+      next = l->next = next->next;
+    l = next;
+  }
+}
+
+
+TaggedString *luaS_collector (void) {
+  TaggedString *frees = NULL;
+  int i;
+  remove_from_list(&(L->rootglobal));
+  for (i=0; i<NUM_HASHS; i++) {
+    stringtable *tb = &L->string_root[i];
+    int j;
+    for (j=0; j<tb->size; j++) {
+      TaggedString *t = tb->hash[j];
+      if (t == NULL) continue;
+      if (t->head.marked == 1)
+        t->head.marked = 0;
+      else if (!t->head.marked) {
+        t->head.next = (GCnode *)frees;
+        frees = t;
+        tb->hash[j] = &EMPTY;
+      }
+    }
+  }
+  return frees;
+}
+
+
+TaggedString *luaS_collectudata (void) {
+  TaggedString *frees = NULL;
+  int i;
+  L->rootglobal.next = NULL;  /* empty list of globals */
+  for (i=NUM_HASHSTR; i<NUM_HASHS; i++) {
+    stringtable *tb = &L->string_root[i];
+    int j;
+    for (j=0; j<tb->size; j++) {
+      TaggedString *t = tb->hash[j];
+      if (t == NULL || t == &EMPTY)
+        continue;
+      LUA_ASSERT(t->constindex == -1, "must be userdata");
+      t->head.next = (GCnode *)frees;
+      frees = t;
+      tb->hash[j] = &EMPTY;
+    }
+  }
+  return frees;
+}
+
+
+void luaS_freeall (void) {
+  int i;
+  for (i=0; i<NUM_HASHS; i++) {
+    stringtable *tb = &L->string_root[i];
+    int j;
+    for (j=0; j<tb->size; j++) {
+      TaggedString *t = tb->hash[j];
+      if (t == &EMPTY) continue;
+      luaM_free(t);
+    }
+    luaM_free(tb->hash);
+  }
+  luaM_free(L->string_root);
+}
+
+
+void luaS_rawsetglobal (TaggedString *ts, TObject *newval) {
+  ts->u.s.globalval = *newval;
+  if (ts->head.next == (GCnode *)ts) {  /* is not in list? */
+    ts->head.next = L->rootglobal.next;
+    L->rootglobal.next = (GCnode *)ts;
+  }
+}
+
+
+char *luaS_travsymbol (int (*fn)(TObject *)) {
+  TaggedString *g;
+  for (g=(TaggedString *)L->rootglobal.next; g; g=(TaggedString *)g->head.next)
+    if (fn(&g->u.s.globalval))
+      return g->str;
+  return NULL;
+}
+
+
+int luaS_globaldefined (char *name) {
+  TaggedString *ts = luaS_new(name);
+  return ts->u.s.globalval.ttype != LUA_T_NIL;
+}
+

lstring.h

@@ -0,0 +1,28 @@
+/*
+** $Id: lstring.h,v 1.6 1997/12/01 20:31:25 roberto Exp roberto $
+** String table (keep all strings handled by Lua)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lstring_h
+#define lstring_h
+
+
+#include "lobject.h"
+
+
+void luaS_init (void);
+TaggedString *luaS_createudata (void *udata, int tag);
+TaggedString *luaS_collector (void);
+void luaS_free (TaggedString *l);
+TaggedString *luaS_newlstr (char *str, long l);
+TaggedString *luaS_new (char *str);
+TaggedString *luaS_newfixedstring (char *str);
+void luaS_rawsetglobal (TaggedString *ts, TObject *newval);
+char *luaS_travsymbol (int (*fn)(TObject *));
+int luaS_globaldefined (char *name);
+TaggedString *luaS_collectudata (void);
+void luaS_freeall (void);
+
+
+#endif

lstrlib.c

@@ -0,0 +1,594 @@
+/*
+** $Id: lstrlib.c,v 1.31 1999/05/14 12:24:04 roberto Exp roberto $
+** Standard library for strings and pattern-matching
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "lua.h"
+#include "lualib.h"
+
+
+
+static void addnchar (char *s, int n)
+{
+  char *b = luaL_openspace(n);
+  memcpy(b, s, n);
+  luaL_addsize(n);
+}
+
+
+static void str_len (void)
+{
+  long l;
+  luaL_check_lstr(1, &l);
+  lua_pushnumber(l);
+}
+
+
+static void closeandpush (void) {
+  lua_pushlstring(luaL_buffer(), luaL_getsize());
+}
+
+
+static long posrelat (long pos, long len) {
+  /* relative string position: negative means back from end */
+  return (pos>=0) ? pos : len+pos+1;
+}
+
+
+static void str_sub (void) {
+  long l;
+  char *s = luaL_check_lstr(1, &l);
+  long start = posrelat(luaL_check_long(2), l);
+  long end = posrelat(luaL_opt_long(3, -1), l);
+  if (start < 1) start = 1;
+  if (end > l) end = l;
+  if (start <= end)
+    lua_pushlstring(s+start-1, end-start+1);
+  else lua_pushstring("");
+}
+
+
+static void str_lower (void) {
+  long l;
+  int i;
+  char *s = luaL_check_lstr(1, &l);
+  luaL_resetbuffer();
+  for (i=0; i<l; i++)
+    luaL_addchar(tolower((unsigned char)(s[i])));
+  closeandpush();
+}
+
+
+static void str_upper (void) {
+  long l;
+  int i;
+  char *s = luaL_check_lstr(1, &l);
+  luaL_resetbuffer();
+  for (i=0; i<l; i++)
+    luaL_addchar(toupper((unsigned char)(s[i])));
+  closeandpush();
+}
+
+static void str_rep (void)
+{
+  long l;
+  char *s = luaL_check_lstr(1, &l);
+  int n = luaL_check_int(2);
+  luaL_resetbuffer();
+  while (n-- > 0)
+    addnchar(s, l);
+  closeandpush();
+}
+
+
+static void str_byte (void) {
+  long l;
+  char *s = luaL_check_lstr(1, &l);
+  long pos = posrelat(luaL_opt_long(2, 1), l);
+  luaL_arg_check(0<pos && pos<=l, 2,  "out of range");
+  lua_pushnumber((unsigned char)s[pos-1]);
+}
+
+
+static void str_char (void) {
+  int i = 0;
+  luaL_resetbuffer();
+  while (lua_getparam(++i) != LUA_NOOBJECT) {
+    double c = luaL_check_number(i);
+    luaL_arg_check((unsigned char)c == c, i, "invalid value");
+    luaL_addchar((unsigned char)c);
+  }
+  closeandpush();
+}
+
+
+
+/*
+** {======================================================
+** PATTERN MATCHING
+** =======================================================
+*/
+
+#ifndef MAX_CAPT
+#define MAX_CAPT 32  /* arbitrary limit */
+#endif
+
+
+struct Capture {
+  char *src_end;  /* end ('\0') of source string */
+  int level;  /* total number of captures (finished or unfinished) */
+  struct {
+    char *init;
+    int len;  /* -1 signals unfinished capture */
+  } capture[MAX_CAPT];
+};
+
+
+#define ESC	'%'
+#define SPECIALS  "^$*+?.([%-"
+
+
+static void push_captures (struct Capture *cap) {
+  int i;
+  for (i=0; i<cap->level; i++) {
+    int l = cap->capture[i].len;
+    if (l == -1) lua_error("unfinished capture");
+    lua_pushlstring(cap->capture[i].init, l);
+  }
+}
+
+
+static int check_cap (int l, struct Capture *cap) {
+  l -= '1';
+  if (!(0 <= l && l < cap->level && cap->capture[l].len != -1))
+    lua_error("invalid capture index");
+  return l;
+}
+
+
+static int capture_to_close (struct Capture *cap) {
+  int level = cap->level;
+  for (level--; level>=0; level--)
+    if (cap->capture[level].len == -1) return level;
+  lua_error("invalid pattern capture");
+  return 0;  /* to avoid warnings */
+}
+
+
+char *luaI_classend (char *p) {
+  switch (*p++) {
+    case ESC:
+      if (*p == '\0')
+        luaL_verror("incorrect pattern (ends with `%c')", ESC);
+      return p+1;
+    case '[':
+      if (*p == '^') p++;
+      if (*p == ']') p++;
+      p = strchr(p, ']');
+      if (!p) lua_error("incorrect pattern (missing `]')");
+      return p+1;
+    default:
+      return p;
+  }
+}
+
+
+static int matchclass (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, char *p, char *end) {
+  int sig = 1;
+  if (*(p+1) == '^') {
+    sig = 0;
+    p++;  /* skip the '^' */
+  }
+  while (++p < end) {
+    if (*p == ESC) {
+      p++;
+      if ((p < end) && matchclass(c, (unsigned char)*p))
+        return sig;
+    }
+    else if ((*(p+1) == '-') && (p+2 < end)) {
+      p+=2;
+      if ((int)(unsigned char)*(p-2) <= c && c <= (int)(unsigned char)*p)
+        return sig;
+    }
+    else if ((unsigned char)*p == c) return sig;
+  }
+  return !sig;
+}
+
+
+
+int luaI_singlematch (int c, char *p, char *ep) {
+  switch (*p) {
+    case '.':  /* matches any char */
+      return 1;
+    case ESC:
+      return matchclass(c, (unsigned char)*(p+1));
+    case '[':
+      return matchbracketclass(c, p, ep-1);
+    default:
+      return ((unsigned char)*p == c);
+  }
+}
+
+
+static char *match (char *s, char *p, struct Capture *cap);
+
+
+static char *matchbalance (char *s, char *p, struct Capture *cap) {
+  if (*p == 0 || *(p+1) == 0)
+    lua_error("unbalanced pattern");
+  if (*s != *p) return NULL;
+  else {
+    int b = *p;
+    int e = *(p+1);
+    int cont = 1;
+    while (++s < cap->src_end) {
+      if (*s == e) {
+        if (--cont == 0) return s+1;
+      }
+      else if (*s == b) cont++;
+    }
+  }
+  return NULL;  /* string ends out of balance */
+}
+
+
+static char *max_expand (char *s, char *p, char *ep, struct Capture *cap) {
+  int i = 0;  /* counts maximum expand for item */
+  while ((s+i)<cap->src_end && luaI_singlematch((unsigned char)*(s+i), p, ep))
+    i++;
+  /* keeps trying to match mith the maximum repetitions */
+  while (i>=0) {
+    char *res = match((s+i), ep+1, cap);
+    if (res) return res;
+    i--;  /* else didn't match; reduce 1 repetition to try again */
+  }
+  return NULL;
+}
+
+
+static char *min_expand (char *s, char *p, char *ep, struct Capture *cap) {
+  for (;;) {
+    char *res = match(s, ep+1, cap);
+    if (res != NULL)
+      return res;
+    else if (s<cap->src_end && luaI_singlematch((unsigned char)*s, p, ep))
+      s++;  /* try with one more repetition */
+    else return NULL;
+  }
+}
+
+
+static char *start_capt (char *s, char *p, struct Capture *cap) {
+  char *res;
+  int level = cap->level;
+  if (level >= MAX_CAPT) lua_error("too many captures");
+  cap->capture[level].init = s;
+  cap->capture[level].len = -1;
+  cap->level = level+1;
+  if ((res=match(s, p+1, cap)) == NULL)  /* match failed? */
+    cap->level--;  /* undo capture */
+  return res;
+}
+
+
+static char *end_capt (char *s, char *p, struct Capture *cap) {
+  int l = capture_to_close(cap);
+  char *res;
+  cap->capture[l].len = s - cap->capture[l].init;  /* close capture */
+  if ((res = match(s, p+1, cap)) == NULL)  /* match failed? */
+    cap->capture[l].len = -1;  /* undo capture */
+  return res;
+}
+
+
+static char *match_capture (char *s, int level, struct Capture *cap) {
+  int l = check_cap(level, cap);
+  int len = cap->capture[l].len;
+  if (cap->src_end-s >= len &&
+      memcmp(cap->capture[l].init, s, len) == 0)
+    return s+len;
+  else return NULL;
+}
+
+
+static char *match (char *s, char *p, struct Capture *cap) {
+  init: /* using goto's to optimize tail recursion */
+  switch (*p) {
+    case '(':  /* start capture */
+      return start_capt(s, p, cap);
+    case ')':  /* end capture */
+      return end_capt(s, p, cap);
+    case ESC:  /* may be %[0-9] or %b */
+      if (isdigit((unsigned char)(*(p+1)))) {  /* capture? */
+        s = match_capture(s, *(p+1), cap);
+        if (s == NULL) return NULL;
+        p+=2; goto init;  /* else return match(p+2, s, cap) */
+      }
+      else if (*(p+1) == 'b') {  /* balanced string? */
+        s = matchbalance(s, p+2, cap);
+        if (s == NULL) return NULL;
+        p+=4; goto init;  /* else return match(p+4, s, cap); */
+      }
+      else 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 == cap->src_end) ? s : NULL;  /* check end of string */
+      else goto dflt;
+    default: dflt: {  /* it is a pattern item */
+      char *ep = luaI_classend(p);  /* points to what is next */
+      int m = s<cap->src_end && luaI_singlematch((unsigned char)*s, p, ep);
+      switch (*ep) {
+        case '?': {  /* optional */
+          char *res;
+          if (m && ((res=match(s+1, ep+1, cap)) != NULL))
+            return res;
+          p=ep+1; goto init;  /* else return match(s, ep+1, cap); */
+        }
+        case '*':  /* 0 or more repetitions */
+          return max_expand(s, p, ep, cap);
+        case '+':  /* 1 or more repetitions */
+          return (m ? max_expand(s+1, p, ep, cap) : NULL);
+        case '-':  /* 0 or more repetitions (minimum) */
+          return min_expand(s, p, ep, cap);
+        default:
+          if (!m) return NULL;
+          s++; p=ep; goto init;  /* else return match(s+1, ep, cap); */
+      }
+    }
+  }
+}
+
+
+static void str_find (void) {
+  long l;
+  char *s = luaL_check_lstr(1, &l);
+  char *p = luaL_check_string(2);
+  long init = posrelat(luaL_opt_long(3, 1), l) - 1;
+  struct Capture cap;
+  luaL_arg_check(0 <= init && init <= l, 3, "out of range");
+  if (lua_getparam(4) != LUA_NOOBJECT ||
+      strpbrk(p, SPECIALS) == NULL) {  /* no special characters? */
+    char *s2 = strstr(s+init, p);
+    if (s2) {
+      lua_pushnumber(s2-s+1);
+      lua_pushnumber(s2-s+strlen(p));
+      return;
+    }
+  }
+  else {
+    int anchor = (*p == '^') ? (p++, 1) : 0;
+    char *s1=s+init;
+    cap.src_end = s+l;
+    do {
+      char *res;
+      cap.level = 0;
+      if ((res=match(s1, p, &cap)) != NULL) {
+        lua_pushnumber(s1-s+1);  /* start */
+        lua_pushnumber(res-s);   /* end */
+        push_captures(&cap);
+        return;
+      }
+    } while (s1++<cap.src_end && !anchor);
+  }
+  lua_pushnil();  /* if arrives here, it didn't find */
+}
+
+
+static void add_s (lua_Object newp, struct Capture *cap) {
+  if (lua_isstring(newp)) {
+    char *news = lua_getstring(newp);
+    int l = lua_strlen(newp);
+    int i;
+    for (i=0; i<l; i++) {
+      if (news[i] != ESC)
+        luaL_addchar(news[i]);
+      else {
+        i++;  /* skip ESC */
+        if (!isdigit((unsigned char)news[i]))
+          luaL_addchar(news[i]);
+        else {
+          int level = check_cap(news[i], cap);
+          addnchar(cap->capture[level].init, cap->capture[level].len);
+        }
+      }
+    }
+  }
+  else {  /* is a function */
+    lua_Object res;
+    int status;
+    int oldbuff;
+    lua_beginblock();
+    push_captures(cap);
+    /* function may use buffer, so save it and create a new one */
+    oldbuff = luaL_newbuffer(0);
+    status = lua_callfunction(newp);
+    /* restore old buffer */
+    luaL_oldbuffer(oldbuff);
+    if (status != 0) {
+      lua_endblock();
+      lua_error(NULL);
+    }
+    res = lua_getresult(1);
+    if (lua_isstring(res))
+      addnchar(lua_getstring(res), lua_strlen(res));
+    lua_endblock();
+  }
+}
+
+
+static void str_gsub (void) {
+  long srcl;
+  char *src = luaL_check_lstr(1, &srcl);
+  char *p = luaL_check_string(2);
+  lua_Object newp = lua_getparam(3);
+  int max_s = luaL_opt_int(4, srcl+1);
+  int anchor = (*p == '^') ? (p++, 1) : 0;
+  int n = 0;
+  struct Capture cap;
+  luaL_arg_check(lua_isstring(newp) || lua_isfunction(newp), 3,
+                 "string or function expected");
+  luaL_resetbuffer();
+  cap.src_end = src+srcl;
+  while (n < max_s) {
+    char *e;
+    cap.level = 0;
+    e = match(src, p, &cap);
+    if (e) {
+      n++;
+      add_s(newp, &cap);
+    }
+    if (e && e>src) /* non empty match? */
+      src = e;  /* skip it */
+    else if (src < cap.src_end)
+      luaL_addchar(*src++);
+    else break;
+    if (anchor) break;
+  }
+  addnchar(src, cap.src_end-src);
+  closeandpush();
+  lua_pushnumber(n);  /* number of substitutions */
+}
+
+/* }====================================================== */
+
+
+static void luaI_addquoted (int arg) {
+  long l;
+  char *s = luaL_check_lstr(arg, &l);
+  luaL_addchar('"');
+  while (l--) {
+    switch (*s) {
+      case '"':  case '\\':  case '\n':
+        luaL_addchar('\\');
+        luaL_addchar(*s);
+        break;
+      case '\0': addnchar("\\000", 4); break;
+      default: luaL_addchar(*s);
+    }
+    s++;
+  }
+  luaL_addchar('"');
+}
+
+/* maximum size of each format specification (such as '%-099.99d') */
+#define MAX_FORMAT 20  /* arbitrary limit */
+
+static void str_format (void) {
+  int arg = 1;
+  char *strfrmt = luaL_check_string(arg);
+  luaL_resetbuffer();
+  while (*strfrmt) {
+    if (*strfrmt != '%')
+      luaL_addchar(*strfrmt++);
+    else if (*++strfrmt == '%')
+      luaL_addchar(*strfrmt++);  /* %% */
+    else { /* format item */
+      struct Capture cap;
+      char form[MAX_FORMAT];  /* to store the format ('%...') */
+      char *buff;  /* to store the formatted item */
+      char *initf = strfrmt;
+      form[0] = '%';
+      if (isdigit((unsigned char)*initf) && *(initf+1) == '$') {
+        arg = *initf - '0';
+        initf += 2;  /* skip the 'n$' */
+      }
+      arg++;
+      cap.src_end = strfrmt+strlen(strfrmt)+1;
+      cap.level = 0;
+      strfrmt = match(initf, "[-+ #0]*(%d*)%.?(%d*)", &cap);
+      if (cap.capture[0].len > 2 || cap.capture[1].len > 2 ||  /* < 100? */
+          strfrmt-initf > MAX_FORMAT-2)
+        lua_error("invalid format (width or precision too long)");
+      strncpy(form+1, initf, strfrmt-initf+1); /* +1 to include conversion */
+      form[strfrmt-initf+2] = 0;
+      buff = luaL_openspace(512);  /* 512 > soid luaI_addquot99.99f', -1e308) */
+      switch (*strfrmt++) {
+        case 'c':  case 'd':  case 'i':
+          sprintf(buff, form, luaL_check_int(arg));
+          break;
+        case 'o':  case 'u':  case 'x':  case 'X':
+          sprintf(buff, form, (unsigned int)luaL_check_number(arg));
+          break;
+        case 'e':  case 'E': case 'f': case 'g': case 'G':
+          sprintf(buff, form, luaL_check_number(arg));
+          break;
+        case 'q':
+          luaI_addquoted(arg);
+          continue;  /* skip the "addsize" at the end */
+        case 's': {
+          long l;
+          char *s = luaL_check_lstr(arg, &l);
+          if (cap.capture[1].len == 0 && l >= 100) {
+            /* no precision and string is too big to be formatted;
+               keep original string */
+            addnchar(s, l);
+            continue;  /* skip the "addsize" at the end */
+          }
+          else {
+            sprintf(buff, form, s);
+            break;
+          }
+        }
+        default:  /* also treat cases 'pnLlh' */
+          lua_error("invalid option in `format'");
+      }
+      luaL_addsize(strlen(buff));
+    }
+  }
+  closeandpush();  /* push the result */
+}
+
+
+static struct luaL_reg strlib[] = {
+{"strlen", str_len},
+{"strsub", str_sub},
+{"strlower", str_lower},
+{"strupper", str_upper},
+{"strchar", str_char},
+{"strrep", str_rep},
+{"ascii", str_byte},  /* for compatibility with 3.0 and earlier */
+{"strbyte", str_byte},
+{"format", str_format},
+{"strfind", str_find},
+{"gsub", str_gsub}
+};
+
+
+/*
+** Open string library
+*/
+void strlib_open (void)
+{
+  luaL_openlib(strlib, (sizeof(strlib)/sizeof(strlib[0])));
+}

ltable.c

@@ -0,0 +1,177 @@
+/*
+** $Id: ltable.c,v 1.21 1999/02/23 14:57:28 roberto Exp roberto $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+#include <stdlib.h>
+
+#include "lauxlib.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "ltable.h"
+#include "lua.h"
+
+
+#define gcsize(n)	(1+(n/16))
+
+#define nuse(t)		((t)->nuse)
+#define nodevector(t)	((t)->node)
+
+
+#define TagDefault LUA_T_ARRAY;
+
+
+
+static long int hashindex (TObject *ref) {
+  long int h;
+  switch (ttype(ref)) {
+    case LUA_T_NUMBER:
+      h = (long int)nvalue(ref);
+      break;
+    case LUA_T_STRING: case LUA_T_USERDATA:
+      h = (IntPoint)tsvalue(ref);
+      break;
+    case LUA_T_ARRAY:
+      h = (IntPoint)avalue(ref);
+      break;
+    case LUA_T_PROTO:
+      h = (IntPoint)tfvalue(ref);
+      break;
+    case LUA_T_CPROTO:
+      h = (IntPoint)fvalue(ref);
+      break;
+    case LUA_T_CLOSURE:
+      h = (IntPoint)clvalue(ref);
+      break;
+    default:
+      lua_error("unexpected type to index table");
+      h = 0;  /* to avoid warnings */
+  }
+  return (h >= 0 ? h : -(h+1));
+}
+
+
+Node *luaH_present (Hash *t, TObject *key) {
+  int tsize = nhash(t);
+  long int h = hashindex(key);
+  int h1 = h%tsize;
+  Node *n = node(t, h1);
+  /* keep looking until an entry with "ref" equal to key or nil */
+  while ((ttype(ref(n)) == ttype(key)) ? !luaO_equalval(key, ref(n))
+                                       : ttype(ref(n)) != LUA_T_NIL) {
+    h1 += (h&(tsize-2)) + 1;  /* double hashing */
+    if (h1 >= tsize) h1 -= tsize;
+    n = node(t, h1);
+  }
+  return n;
+}
+
+
+void luaH_free (Hash *frees) {
+  while (frees) {
+    Hash *next = (Hash *)frees->head.next;
+    L->nblocks -= gcsize(frees->nhash);
+    luaM_free(nodevector(frees));
+    luaM_free(frees);
+    frees = next;
+  }
+}
+
+
+static Node *hashnodecreate (int nhash) {
+  Node *v = luaM_newvector(nhash, Node);
+  int i;
+  for (i=0; i<nhash; i++)
+    ttype(ref(&v[i])) = ttype(val(&v[i])) = LUA_T_NIL;
+  return v;
+}
+
+
+Hash *luaH_new (int nhash) {
+  Hash *t = luaM_new(Hash);
+  nhash = luaO_redimension(nhash*3/2);
+  nodevector(t) = hashnodecreate(nhash);
+  nhash(t) = nhash;
+  nuse(t) = 0;
+  t->htag = TagDefault;
+  luaO_insertlist(&(L->roottable), (GCnode *)t);
+  L->nblocks += gcsize(nhash);
+  return t;
+}
+
+
+static int newsize (Hash *t) {
+  Node *v = t->node;
+  int size = nhash(t);
+  int realuse = 0;
+  int i;
+  for (i=0; i<size; i++) {
+    if (ttype(val(v+i)) != LUA_T_NIL)
+      realuse++;
+  }
+  return luaO_redimension((realuse+1)*2);  /* +1 is the new element */
+}
+
+
+static void rehash (Hash *t) {
+  int nold = nhash(t);
+  Node *vold = nodevector(t);
+  int nnew = newsize(t);
+  int i;
+  nodevector(t) = hashnodecreate(nnew);
+  nhash(t) = nnew;
+  nuse(t) = 0;
+  for (i=0; i<nold; i++) {
+    Node *n = vold+i;
+    if (ttype(val(n)) != LUA_T_NIL) {
+      *luaH_present(t, ref(n)) = *n;  /* copy old node to new hash */
+      nuse(t)++;
+    }
+  }
+  L->nblocks += gcsize(nnew)-gcsize(nold);
+  luaM_free(vold);
+}
+
+
+void luaH_set (Hash *t, TObject *ref, TObject *val) {
+  Node *n = luaH_present(t, ref);
+  if (ttype(ref(n)) != LUA_T_NIL)
+    *val(n) = *val;
+  else {
+    TObject buff;
+    buff = *val;  /* rehash may invalidate this address */
+    if ((long)nuse(t)*3L > (long)nhash(t)*2L) {
+      rehash(t);
+      n = luaH_present(t, ref);
+    }
+    nuse(t)++;
+    *ref(n) = *ref;
+    *val(n) = buff;
+  }
+}
+
+
+int luaH_pos (Hash *t, TObject *r) {
+  Node *n = luaH_present(t, r);
+  luaL_arg_check(ttype(val(n)) != LUA_T_NIL, 2, "key not found");
+  return n-(t->node);
+}
+
+
+void luaH_setint (Hash *t, int ref, TObject *val) {
+  TObject index;
+  ttype(&index) = LUA_T_NUMBER;
+  nvalue(&index) = ref;
+  luaH_set(t, &index, val);
+}
+
+
+TObject *luaH_getint (Hash *t, int ref) {
+  TObject index;
+  ttype(&index) = LUA_T_NUMBER;
+  nvalue(&index) = ref;
+  return luaH_get(t, &index);
+}
+

ltable.h

@@ -0,0 +1,30 @@
+/*
+** $Id: ltable.h,v 1.10 1999/01/25 17:40:10 roberto Exp roberto $
+** Lua tables (hash)
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltable_h
+#define ltable_h
+
+#include "lobject.h"
+
+
+#define node(t,i)       (&(t)->node[i])
+#define ref(n)		(&(n)->ref)
+#define val(n)		(&(n)->val)
+#define nhash(t)	((t)->nhash)
+
+#define luaH_get(t,ref)	(val(luaH_present((t), (ref))))
+#define luaH_move(t,from,to)	(luaH_setint(t, to, luaH_getint(t, from)))
+
+Hash *luaH_new (int nhash);
+void luaH_free (Hash *frees);
+Node *luaH_present (Hash *t, TObject *key);
+void luaH_set (Hash *t, TObject *ref, TObject *val);
+int luaH_pos (Hash *t, TObject *r);
+void luaH_setint (Hash *t, int ref, TObject *val);
+TObject *luaH_getint (Hash *t, int ref);
+
+
+#endif

ltm.c

@@ -0,0 +1,248 @@
+/*
+** $Id: ltm.c,v 1.24 1999/02/26 15:48:55 roberto Exp roberto $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+
+#include <stdio.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
+#include "ltm.h"
+
+
+char *luaT_eventname[] = {  /* ORDER IM */
+  "gettable", "settable", "index", "getglobal", "setglobal", "add",
+  "sub", "mul", "div", "pow", "unm", "lt", "le", "gt", "ge",
+  "concat", "gc", "function", NULL
+};
+
+
+static int luaI_checkevent (char *name, char *list[]) {
+  int e = luaL_findstring(name, list);
+  if (e < 0)
+    luaL_verror("`%.50s' is not a valid event name", name);
+  return e;
+}
+
+
+
+/* events in LUA_T_NIL are all allowed, since this is used as a
+*  'placeholder' for "default" fallbacks
+*/
+static char luaT_validevents[NUM_TAGS][IM_N] = { /* ORDER LUA_T, ORDER IM */
+{1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* LUA_T_USERDATA */
+{1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1},  /* LUA_T_NUMBER */
+{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},  /* LUA_T_STRING */
+{0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},  /* LUA_T_ARRAY */
+{1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* LUA_T_PROTO */
+{1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* LUA_T_CPROTO */
+{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}   /* LUA_T_NIL */
+};
+
+static int luaT_validevent (int t, int e) {  /* ORDER LUA_T */
+  return (t < LUA_T_NIL) ?  1 : luaT_validevents[-t][e];
+}
+
+
+static void init_entry (int tag) {
+  int i;
+  for (i=0; i<IM_N; i++)
+    ttype(luaT_getim(tag, i)) = LUA_T_NIL;
+}
+
+
+void luaT_init (void) {
+  int t;
+  L->last_tag = -(NUM_TAGS-1);
+  luaM_growvector(L->IMtable, 0, NUM_TAGS, struct IM, arrEM, MAX_INT);
+  for (t=L->last_tag; t<=0; t++)
+    init_entry(t);
+}
+
+
+int lua_newtag (void) {
+  --L->last_tag;
+  luaM_growvector(L->IMtable, -(L->last_tag), 1, struct IM, arrEM, MAX_INT);
+  init_entry(L->last_tag);
+  return L->last_tag;
+}
+
+
+static void checktag (int tag) {
+  if (!(L->last_tag <= tag && tag <= 0))
+    luaL_verror("%d is not a valid tag", tag);
+}
+
+void luaT_realtag (int tag) {
+  if (!(L->last_tag <= tag && tag < LUA_T_NIL))
+    luaL_verror("tag %d was not created by `newtag'", tag);
+}
+
+
+int lua_copytagmethods (int tagto, int tagfrom) {
+  int e;
+  checktag(tagto);
+  checktag(tagfrom);
+  for (e=0; e<IM_N; e++) {
+    if (luaT_validevent(tagto, e))
+      *luaT_getim(tagto, e) = *luaT_getim(tagfrom, e);
+  }
+  return tagto;
+}
+
+
+int luaT_effectivetag (TObject *o) {
+  int t;
+  switch (t = ttype(o)) {
+    case LUA_T_ARRAY:
+      return o->value.a->htag;
+    case LUA_T_USERDATA: {
+      int tag = o->value.ts->u.d.tag;
+      return (tag >= 0) ? LUA_T_USERDATA : tag;
+    }
+    case LUA_T_CLOSURE:
+      return o->value.cl->consts[0].ttype;
+#ifdef DEBUG
+    case LUA_T_PMARK: case LUA_T_CMARK:
+    case LUA_T_CLMARK: case LUA_T_LINE:
+      LUA_INTERNALERROR("invalid type");
+#endif
+    default:
+      return t;
+  }
+}
+
+
+TObject *luaT_gettagmethod (int t, char *event) {
+  int e = luaI_checkevent(event, luaT_eventname);
+  checktag(t);
+  if (luaT_validevent(t, e))
+    return luaT_getim(t,e);
+  else
+    return &luaO_nilobject;
+}
+
+
+void luaT_settagmethod (int t, char *event, TObject *func) {
+  TObject temp;
+  int e = luaI_checkevent(event, luaT_eventname);
+  checktag(t);
+  if (!luaT_validevent(t, e))
+    luaL_verror("cannot change tag method `%.20s' for type `%.20s'%.20s",
+                luaT_eventname[e], luaO_typenames[-t],
+                (t == LUA_T_ARRAY || t == LUA_T_USERDATA) ? " with default tag"
+                                                          : "");
+  temp = *func;
+  *func = *luaT_getim(t,e);
+  *luaT_getim(t, e) = temp;
+}
+
+
+char *luaT_travtagmethods (int (*fn)(TObject *)) {  /* ORDER IM */
+  int e;
+  for (e=IM_GETTABLE; e<=IM_FUNCTION; e++) {
+    int t;
+    for (t=0; t>=L->last_tag; t--)
+      if (fn(luaT_getim(t,e)))
+        return luaT_eventname[e];
+  }
+  return NULL;
+}
+
+
+/*
+* ===================================================================
+* compatibility with old fallback system
+*/
+#ifdef LUA_COMPAT2_5
+
+#include "lapi.h"
+#include "lstring.h"
+
+static void errorFB (void)
+{
+  lua_Object o = lua_getparam(1);
+  if (lua_isstring(o))
+    fprintf(stderr, "lua: %s\n", lua_getstring(o));
+  else
+    fprintf(stderr, "lua: unknown error\n");
+}
+
+
+static void nilFB (void) { }
+
+
+static void typeFB (void) {
+  lua_error("unexpected type");
+}
+
+
+static void fillvalids (IMS e, TObject *func) {
+  int t;
+  for (t=LUA_T_NIL; t<=LUA_T_USERDATA; t++)
+    if (luaT_validevent(t, e))
+      *luaT_getim(t, e) = *func;
+}
+
+
+void luaT_setfallback (void) {
+  static char *oldnames [] = {"error", "getglobal", "arith", "order", NULL};
+  TObject oldfunc;
+  lua_CFunction replace;
+  char *name = luaL_check_string(1);
+  lua_Object func = lua_getparam(2);
+  luaL_arg_check(lua_isfunction(func), 2, "function expected");
+  switch (luaL_findstring(name, oldnames)) {
+    case 0: {  /* old error fallback */
+      TObject *em = &(luaS_new("_ERRORMESSAGE")->u.s.globalval);
+      oldfunc = *em;
+      *em = *luaA_Address(func);
+      replace = errorFB;
+      break;
+    }
+    case 1:  /* old getglobal fallback */
+      oldfunc = *luaT_getim(LUA_T_NIL, IM_GETGLOBAL);
+      *luaT_getim(LUA_T_NIL, IM_GETGLOBAL) = *luaA_Address(func);
+      replace = nilFB;
+      break;
+    case 2: {  /* old arith fallback */
+      int i;
+      oldfunc = *luaT_getim(LUA_T_NUMBER, IM_POW);
+      for (i=IM_ADD; i<=IM_UNM; i++)  /* ORDER IM */
+        fillvalids(i, luaA_Address(func));
+      replace = typeFB;
+      break;
+    }
+    case 3: {  /* old order fallback */
+      int i;
+      oldfunc = *luaT_getim(LUA_T_NIL, IM_LT);
+      for (i=IM_LT; i<=IM_GE; i++)  /* ORDER IM */
+        fillvalids(i, luaA_Address(func));
+      replace = typeFB;
+      break;
+    }
+    default: {
+      int e;
+      if ((e = luaL_findstring(name, luaT_eventname)) >= 0) {
+        oldfunc = *luaT_getim(LUA_T_NIL, e);
+        fillvalids(e, luaA_Address(func));
+        replace = (e == IM_GC || e == IM_INDEX) ? nilFB : typeFB;
+      }
+      else {
+        luaL_verror("`%.50s' is not a valid fallback name", name);
+        replace = NULL;  /* to avoid warnings */
+      }
+    }
+  }
+  if (oldfunc.ttype != LUA_T_NIL)
+    luaA_pushobject(&oldfunc);
+  else
+    lua_pushcfunction(replace);
+}
+#endif
+

ltm.h

@@ -0,0 +1,62 @@
+/*
+** $Id: ltm.h,v 1.4 1997/11/26 18:53:45 roberto Exp roberto $
+** Tag methods
+** See Copyright Notice in lua.h
+*/
+
+#ifndef ltm_h
+#define ltm_h
+
+
+#include "lobject.h"
+#include "lstate.h"
+
+/*
+* WARNING: if you change the order of this enumeration,
+* grep "ORDER IM"
+*/
+typedef enum {
+  IM_GETTABLE = 0,
+  IM_SETTABLE,
+  IM_INDEX,
+  IM_GETGLOBAL,
+  IM_SETGLOBAL,
+  IM_ADD,
+  IM_SUB,
+  IM_MUL,
+  IM_DIV,
+  IM_POW,
+  IM_UNM,
+  IM_LT,
+  IM_LE,
+  IM_GT,
+  IM_GE,
+  IM_CONCAT,
+  IM_GC,
+  IM_FUNCTION
+} IMS;
+
+#define IM_N 18
+
+
+struct IM {
+  TObject int_method[IM_N];
+};
+
+
+#define luaT_getim(tag,event) (&L->IMtable[-(tag)].int_method[event])
+#define luaT_getimbyObj(o,e)  (luaT_getim(luaT_effectivetag(o),(e)))
+
+extern char *luaT_eventname[];
+
+
+void luaT_init (void);
+void luaT_realtag (int tag);
+int luaT_effectivetag (TObject *o);
+void luaT_settagmethod (int t, char *event, TObject *func);
+TObject *luaT_gettagmethod (int t, char *event);
+char *luaT_travtagmethods (int (*fn)(TObject *));
+
+void luaT_setfallback (void);  /* only if LUA_COMPAT2_5 */
+
+#endif

lua.c

@@ -1,92 +1,188 @@
 /*
-** lua.c
-** Linguagem para Usuarios de Aplicacao
+** $Id: lua.c,v 1.20 1999/06/24 19:42:02 roberto Exp roberto $
+** Lua stand-alone interpreter
+** See Copyright Notice in lua.h
 */
 
-char *rcs_lua="$Id: lua.c,v 1.6 1995/10/23 13:54:11 roberto Exp roberto $";
 
+#include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "lua.h"
+#include "luadebug.h"
 #include "lualib.h"
 
-static int lua_argc;
-static char **lua_argv;
 
-/*
-** although this function is POSIX, there is no standard header file that
-** defines it
-*/
-int isatty (int fd);
+#ifdef _POSIX_SOURCE
+#include <unistd.h>
+#else
+#define isatty(x)       (x==0)  /* assume stdin is a tty */
+#endif
 
-/*
-%F Allow Lua code to access argv strings.
-%i Receive from Lua the argument number (starting with 1).
-%o Return to Lua the argument, or nil if it does not exist.
-*/
-static void lua_getargv (void)
-{
- lua_Object lo = lua_getparam(1);
- if (!lua_isnumber(lo))
-  lua_pushnil();
- else
- {
-  int n = (int)lua_getnumber(lo);
-  if (n < 1 || n > lua_argc) lua_pushnil();
-  else                       lua_pushstring(lua_argv[n]);
- }
+
+typedef void (*handler)(int);  /* type for signal actions */
+
+static void laction (int i);
+
+
+static lua_LHFunction old_linehook = NULL;
+static lua_CHFunction old_callhook = NULL;
+
+
+static handler lreset (void) {
+  return signal(SIGINT, laction);
 }
 
 
-static void manual_input (void)
-{
-  if (isatty(fileno(stdin)))
-  {
-   char buffer[250];
-   while (gets(buffer) != 0)
-     lua_dostring(buffer);
+static void lstop (void) {
+  lua_setlinehook(old_linehook);
+  lua_setcallhook(old_callhook);
+  lreset();
+  lua_error("interrupted!");
+}
+
+
+static void laction (int i) {
+  signal(SIGINT, SIG_DFL); /* if another SIGINT happens before lstop,
+                              terminate process (default action) */
+  old_linehook = lua_setlinehook((lua_LHFunction)lstop);
+  old_callhook = lua_setcallhook((lua_CHFunction)lstop);
+}
+
+
+static int ldo (int (*f)(char *), char *name) {
+  int res;
+  handler h = lreset();
+  res = f(name);  /* dostring | dofile */
+  signal(SIGINT, h);  /* restore old action */
+  return res;
+}
+
+
+static void print_message (void) {
+  fprintf(stderr,
+"Lua: command line options:\n"
+"  -v       print version information\n"
+"  -d       turn debug on\n"
+"  -e stat  dostring `stat'\n"
+"  -q       interactive mode without prompt\n"
+"  -i       interactive mode with prompt\n"
+"  -        executes stdin as a file\n"
+"  a=b      sets global `a' with string `b'\n"
+"  name     dofile `name'\n\n");
+}
+
+
+static void assign (char *arg) {
+  if (strlen(arg) >= 500)
+    fprintf(stderr, "lua: shell argument too long");
+  else {
+    char buffer[500];
+    char *eq = strchr(arg, '=');
+    lua_pushstring(eq+1);
+    strncpy(buffer, arg, eq-arg);
+    buffer[eq-arg] = 0;
+    lua_setglobal(buffer);
   }
-  else
-    lua_dofile(NULL);  /* executes stdin as a file */
+}
+
+
+static void manual_input (int prompt) {
+  int cont = 1;
+  while (cont) {
+    char buffer[BUFSIZ];
+    int i = 0;
+    lua_beginblock();
+    if (prompt)
+      printf("%s", lua_getstring(lua_getglobal("_PROMPT")));
+    for(;;) {
+      int c = getchar();
+      if (c == EOF) {
+        cont = 0;
+        break;
+      }
+      else if (c == '\n') {
+        if (i>0 && buffer[i-1] == '\\')
+          buffer[i-1] = '\n';
+        else break;
+      }
+      else if (i >= BUFSIZ-1) {
+        fprintf(stderr, "lua: argument line too long\n");
+        break;
+      }
+      else buffer[i++] = (char)c;
+    }
+    buffer[i] = '\0';
+    ldo(lua_dostring, buffer);
+    lua_endblock();
+  }
+  printf("\n");
 }
 
 
 int main (int argc, char *argv[])
 {
- int i;
- int result = 0;
- iolib_open ();
- strlib_open ();
- mathlib_open ();
-
- lua_register("argv", lua_getargv);
-
- if (argc < 2)
-   manual_input();
- else
- {
-  for (i=1; i<argc; i++)
-   if (strcmp(argv[i], "--") == 0)
-   {
-    lua_argc = argc-i-1;
-    lua_argv = argv+i;
-    break;
-   }
-  for (i=1; i<argc; i++)
-  {
-   if (strcmp(argv[i], "--") == 0)
-    break;
-   else if (strcmp(argv[i], "-") == 0)
-    manual_input();
-   else if (strcmp(argv[i], "-v") == 0)
-    printf("%s  %s\n(written by %s)\n\n",
-            LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
-   else
-    result = lua_dofile (argv[i]);
+  int i;
+  lua_open();
+  lua_pushstring("> "); lua_setglobal("_PROMPT");
+  lua_userinit();
+  if (argc < 2) {  /* no arguments? */
+    if (isatty(0)) {
+      printf("%s  %s\n", LUA_VERSION, LUA_COPYRIGHT);
+      manual_input(1);
+    }
+    else
+      ldo(lua_dofile, NULL);  /* executes stdin as a file */
   }
- }
- return result;
+  else for (i=1; i<argc; i++) {
+    if (argv[i][0] == '-') {  /* option? */
+      switch (argv[i][1]) {
+        case 0:
+          ldo(lua_dofile, NULL);  /* executes stdin as a file */
+          break;
+        case 'i':
+          manual_input(1);
+          break;
+        case 'q':
+          manual_input(0);
+          break;
+        case 'd':
+          lua_setdebug(1);
+          break;
+        case 'v':
+          printf("%s  %s\n(written by %s)\n\n",
+                 LUA_VERSION, LUA_COPYRIGHT, LUA_AUTHORS);
+          break;
+        case 'e':
+          i++;
+          if (ldo(lua_dostring, argv[i]) != 0) {
+            fprintf(stderr, "lua: error running argument `%s'\n", argv[i]);
+            return 1;
+          }
+          break;
+        default:
+          print_message();
+          exit(1);
+      }
+    }
+    else if (strchr(argv[i], '='))
+      assign(argv[i]);
+    else {
+      int result = ldo(lua_dofile, argv[i]);
+      if (result) {
+        if (result == 2) {
+          fprintf(stderr, "lua: cannot execute file ");
+          perror(argv[i]);
+        }
+        exit(1);
+      }
+    }
+  }
+#ifdef DEBUG
+  lua_close();
+#endif
+  return 0;
 }
 
-

lua.h

@@ -1,108 +1,193 @@
 /*
-** LUA - Linguagem para Usuarios de Aplicacao
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: lua.h,v 3.20 1995/10/31 16:41:53 roberto Exp roberto $
+** $Id: lua.h,v 1.31 1999/04/15 12:33:19 roberto Exp roberto $
+** Lua - An Extensible Extension Language
+** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
+** e-mail: lua@tecgraf.puc-rio.br
+** www: http://www.tecgraf.puc-rio.br/lua/
+** See Copyright Notice at the end of this file
 */
 
 
 #ifndef lua_h
 #define lua_h
 
-#define LUA_VERSION	"Lua 2.2"
-#define LUA_COPYRIGHT	"Copyright (C) 1994, 1995 TeCGraf"
+#define LUA_VERSION	"Lua 3.2"
+#define LUA_COPYRIGHT	"Copyright (C) 1994-1999 TeCGraf, PUC-Rio"
 #define LUA_AUTHORS 	"W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
 
 
-/* Private Part */
- 
-typedef enum
-{
- LUA_T_NIL	= -1,
- LUA_T_NUMBER	= -2,
- LUA_T_STRING	= -3,
- LUA_T_ARRAY	= -4,
- LUA_T_FUNCTION	= -5,
- LUA_T_CFUNCTION= -6,
- LUA_T_MARK	= -7,
- LUA_T_CMARK	= -8,
- LUA_T_LINE	= -9,
- LUA_T_USERDATA = 0
-} lua_Type;
- 
-
-/* Public Part */
-
 #define LUA_NOOBJECT  0
 
+#define LUA_ANYTAG    (-1)
+
+typedef struct lua_State lua_State;
+extern lua_State *lua_state;
+
 typedef void (*lua_CFunction) (void);
 typedef unsigned int lua_Object;
 
-lua_Object     lua_setfallback		(char *name, lua_CFunction fallback);
+void	       lua_open			(void);
+void           lua_close		(void);
+lua_State      *lua_setstate		(lua_State *st);
+
+lua_Object     lua_settagmethod	(int tag, char *event); /* In: new method */
+lua_Object     lua_gettagmethod	(int tag, char *event);
+
+int            lua_newtag		(void);
+int            lua_copytagmethods	(int tagto, int tagfrom);
+void           lua_settag		(int tag); /* In: object */
 
 void           lua_error		(char *s);
-int            lua_dofile 		(char *filename);
-int            lua_dostring 		(char *string);
-int            lua_callfunction		(lua_Object function);
-int	       lua_call			(char *funcname);
+int            lua_dofile 		(char *filename); /* Out: returns */
+int            lua_dostring 		(char *string); /* Out: returns */
+int            lua_dobuffer		(char *buff, int size, char *name);
+					  /* Out: returns */
+int            lua_callfunction		(lua_Object f);
+					  /* In: parameters; Out: returns */
 
 void	       lua_beginblock		(void);
 void	       lua_endblock		(void);
 
-lua_Object     lua_getparam 		(int number);
-#define	       lua_getresult(_)		lua_getparam(_)
+lua_Object     lua_lua2C 		(int number);
+#define	       lua_getparam(_)		lua_lua2C(_)
+#define	       lua_getresult(_)		lua_lua2C(_)
 
-float          lua_getnumber 		(lua_Object object);
+int            lua_isnil                (lua_Object object);
+int            lua_istable              (lua_Object object);
+int            lua_isuserdata           (lua_Object object);
+int            lua_iscfunction          (lua_Object object);
+int            lua_isnumber             (lua_Object object);
+int            lua_isstring             (lua_Object object);
+int            lua_isfunction           (lua_Object object);
+
+double         lua_getnumber 		(lua_Object object);
 char          *lua_getstring 		(lua_Object object);
+long           lua_strlen 		(lua_Object object);
 lua_CFunction  lua_getcfunction 	(lua_Object object);
-void          *lua_getuserdata  	(lua_Object object);
+void	      *lua_getuserdata		(lua_Object object);
+
 
 void 	       lua_pushnil 		(void);
-void           lua_pushnumber 		(float n);
+void           lua_pushnumber 		(double n);
+void           lua_pushlstring		(char *s, long len);
 void           lua_pushstring 		(char *s);
-void           lua_pushliteral 		(char *s);
-void           lua_pushcfunction	(lua_CFunction fn);
-void           lua_pushusertag     	(void *u, int tag);
+void           lua_pushcclosure		(lua_CFunction fn, int n);
+void           lua_pushusertag          (void *u, int tag);
 void           lua_pushobject       	(lua_Object object);
 
+lua_Object     lua_pop			(void);
+
 lua_Object     lua_getglobal 		(char *name);
-void           lua_storeglobal		(char *name);
+lua_Object     lua_rawgetglobal		(char *name);
+void           lua_setglobal		(char *name); /* In: value */
+void           lua_rawsetglobal		(char *name); /* In: value */
 
-void           lua_storesubscript	(void);
-lua_Object     lua_getsubscript         (void);
+void           lua_settable	(void); /* In: table, index, value */
+void           lua_rawsettable	(void); /* In: table, index, value */
+lua_Object     lua_gettable 		(void); /* In: table, index */
+lua_Object     lua_rawgettable		(void); /* In: table, index */
 
-int            lua_type 		(lua_Object object);
+int            lua_tag			(lua_Object object);
 
-int	       lua_lock			(void);
-lua_Object     lua_getlocked		(int ref);
-void	       lua_pushlocked		(int ref);
-void	       lua_unlock		(int ref);
+char          *lua_nextvar		(char *varname);  /* Out: value */
+int            lua_next			(lua_Object o, int i);
+						/* Out: ref, value */ 
+
+int            lua_ref			(int lock); /* In: value */
+lua_Object     lua_getref		(int ref);
+void	       lua_unref		(int ref);
 
 lua_Object     lua_createtable		(void);
 
-
-/* some useful macros */
-
-#define lua_lockobject(o)  (lua_pushobject(o), lua_lock())
-
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
-
-#define lua_pushuserdata(u)     lua_pushusertag(u, LUA_T_USERDATA)
-
-#define lua_isnil(_)            (lua_type(_)==LUA_T_NIL)
-#define lua_isnumber(_)         (lua_type(_)==LUA_T_NUMBER)
-#define lua_isstring(_)         (lua_type(_)==LUA_T_STRING)
-#define lua_istable(_)          (lua_type(_)==LUA_T_ARRAY)
-#define lua_isfunction(_)       (lua_type(_)==LUA_T_FUNCTION)
-#define lua_iscfunction(_)      (lua_type(_)==LUA_T_CFUNCTION)
-#define lua_isuserdata(_)       (lua_type(_)>=LUA_T_USERDATA)
+long	       lua_collectgarbage	(long limit);
 
 
-/* for lua 1.1 compatibility. Avoid using these macros */
+/* =============================================================== */
+/* some useful macros/functions */
 
-#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript())
-#define lua_getfield(o,f)   (lua_pushobject(o), lua_pushliteral(f), lua_getsubscript())
+#define lua_call(name)		lua_callfunction(lua_getglobal(name))
+
+#define lua_pushref(ref)	lua_pushobject(lua_getref(ref))
+
+#define lua_refobject(o,l)	(lua_pushobject(o), lua_ref(l))
+
+#define lua_register(n,f)	(lua_pushcfunction(f), lua_setglobal(n))
+
+#define lua_pushuserdata(u)     lua_pushusertag(u, 0)
+
+#define lua_pushcfunction(f)	lua_pushcclosure(f, 0)
+
+#define lua_clonetag(t)		lua_copytagmethods(lua_newtag(), (t))
+
+lua_Object     lua_seterrormethod (void);  /* In: new method */
+
+/* ==========================================================================
+** for compatibility with old versions. Avoid using these macros/functions
+** If your program does need any of these, define LUA_COMPAT2_5
+*/
+
+
+#ifdef LUA_COMPAT2_5
+
+
+lua_Object     lua_setfallback		(char *event, lua_CFunction fallback);
+
+#define lua_storeglobal		lua_setglobal
+#define lua_type		lua_tag
+
+#define lua_lockobject(o)  lua_refobject(o,1)
+#define	lua_lock() lua_ref(1)
+#define lua_getlocked lua_getref
+#define	lua_pushlocked lua_pushref
+#define	lua_unlock lua_unref
+
+#define lua_pushliteral(o)  lua_pushstring(o)
+
+#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_gettable())
+#define lua_getfield(o,f)   (lua_pushobject(o), lua_pushstring(f), lua_gettable())
 
 #define lua_copystring(o) (strdup(lua_getstring(o)))
 
+#define lua_getsubscript  lua_gettable
+#define lua_storesubscript  lua_settable
+
 #endif
+
+#endif
+
+
+
+/******************************************************************************
+* Copyright (c) 1994-1999 TeCGraf, PUC-Rio.  All rights reserved.
+* 
+* Permission is hereby granted, without written agreement and without license
+* or royalty fees, to use, copy, modify, and distribute this software and its
+* documentation for any purpose, including commercial applications, subject to
+* the following conditions:
+* 
+*  - The above copyright notice and this permission notice shall appear in all
+*    copies or substantial portions of this software.
+* 
+*  - The origin of this software must not be misrepresented; you must not
+*    claim that you wrote the original software. If you use this software in a
+*    product, an acknowledgment in the product documentation would be greatly
+*    appreciated (but it is not required).
+* 
+*  - Altered source versions must be plainly marked as such, and must not be
+*    misrepresented as being the original software.
+*    
+* The authors specifically disclaim any warranties, including, but not limited
+* to, the implied warranties of merchantability and fitness for a particular
+* purpose.  The software provided hereunder is on an "as is" basis, and the
+* authors have no obligation to provide maintenance, support, updates,
+* enhancements, or modifications.  In no event shall TeCGraf, PUC-Rio, or the
+* authors be held liable to any party for direct, indirect, special,
+* incidental, or consequential damages arising out of the use of this software
+* and its documentation.
+* 
+* The Lua language and this implementation have been entirely designed and
+* written by Waldemar Celes Filho, Roberto Ierusalimschy and
+* Luiz Henrique de Figueiredo at TeCGraf, PUC-Rio.
+*
+* This implementation contains no third-party code.
+******************************************************************************/

luadebug.h

@@ -1,20 +1,34 @@
 /*
-** LUA - Linguagem para Usuarios de Aplicacao
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: luadebug.h,v 1.1 1995/10/17 14:12:45 roberto Exp roberto $
+** $Id: luadebug.h,v 1.5 1999/02/04 17:47:59 roberto Exp roberto $
+** Debugging API
+** See Copyright Notice in lua.h
 */
 
 
 #ifndef luadebug_h
 #define luadebug_h
 
+
 #include "lua.h"
 
-lua_Object lua_stackedfunction(int level);
-void lua_funcinfo (lua_Object func, char **filename, int *linedefined);
-int lua_currentline (lua_Object func);
-char *getobjname (lua_Object o, char **name);
+typedef lua_Object lua_Function;
+
+typedef void (*lua_LHFunction) (int line);
+typedef void (*lua_CHFunction) (lua_Function func, char *file, int line);
+
+lua_Function lua_stackedfunction (int level);
+void lua_funcinfo (lua_Object func, char **source, int *linedefined);
+int lua_currentline (lua_Function func);
+char *lua_getobjname (lua_Object o, char **name);
+
+lua_Object lua_getlocal (lua_Function func, int local_number, char **name);
+int lua_setlocal (lua_Function func, int local_number);
+
+int lua_nups (lua_Function func);
+
+lua_LHFunction lua_setlinehook (lua_LHFunction func);
+lua_CHFunction lua_setcallhook (lua_CHFunction func);
+int lua_setdebug (int debug);
 
 
 #endif

lualib.h

@@ -1,22 +1,36 @@
 /*
-** Libraries to be used in LUA programs
-** Grupo de Tecnologia em Computacao Grafica
-** TeCGraf - PUC-Rio
-** $Id: lualib.h,v 1.3 1994/12/13 15:59:16 roberto Exp roberto $
+** $Id: lualib.h,v 1.5 1999/01/08 16:47:44 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"
+
+void lua_iolibopen   (void);
+void lua_strlibopen  (void);
+void lua_mathlibopen (void);
+void lua_dblibopen   (void);
 
 
-/* auxiliar functions (private) */
-void lua_arg_error(char *funcname);
-char *lua_check_string (int numArg, char *funcname);
-float lua_check_number (int numArg, char *funcname);
+void lua_userinit (void);
+
+
+/* To keep compatibility with old versions */
+
+#define iolib_open	lua_iolibopen
+#define strlib_open	lua_strlibopen
+#define mathlib_open	lua_mathlibopen
+
+
+
+/* Auxiliary functions (private) */
+
+char *luaI_classend (char *p);
+int luaI_singlematch (int c, char *p, char *ep);
 
 #endif
 

luamem.c

@@ -1,44 +0,0 @@
-/*
-** mem.c
-** TecCGraf - PUC-Rio
-*/
-
-char *rcs_mem = "$Id: mem.c,v 1.4 1995/01/13 22:11:12 roberto Exp roberto $";
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "mem.h"
-#include "lua.h"
-
-void luaI_free (void *block)
-{
-  *((int *)block) = -1;  /* to catch errors */
-  free(block);
-}
-
-
-void *luaI_malloc (unsigned long size)
-{
-  void *block = malloc((size_t)size);
-  if (block == NULL)
-    lua_error("not enough memory");
-  return block;
-}
-
-
-void *luaI_realloc (void *oldblock, unsigned long size)
-{
-  void *block = realloc(oldblock, (size_t)size);
-  if (block == NULL)
-    lua_error("not enough memory");
-  return block;
-}
-
-
-char *luaI_strdup (char *str)
-{
-  char *newstr = luaI_malloc(strlen(str)+1);
-  strcpy(newstr, str);
-  return newstr;
-}

luamem.h

@@ -1,25 +0,0 @@
-/*
-** mem.c
-** memory manager for lua
-** $Id: mem.h,v 1.1 1994/11/16 17:38:08 roberto Stab roberto $
-*/
- 
-#ifndef mem_h
-#define mem_h
-
-#ifndef NULL
-#define NULL 0
-#endif
-
-void luaI_free (void *block);
-void *luaI_malloc (unsigned long size);
-void *luaI_realloc (void *oldblock, unsigned long size);
-
-char *luaI_strdup (char *str);
-
-#define new(s)          ((s *)luaI_malloc(sizeof(s)))
-#define newvector(n,s)  ((s *)luaI_malloc((n)*sizeof(s)))
-#define growvector(old,n,s) ((s *)luaI_realloc(old,(n)*sizeof(s)))
-
-#endif 
-

lundump.c

@@ -0,0 +1,239 @@
+/*
+** $Id: lundump.c,v 1.21 1999/07/02 19:34:26 lhf Exp $
+** load bytecodes from files
+** See Copyright Notice in lua.h
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include "lauxlib.h"
+#include "lfunc.h"
+#include "lmem.h"
+#include "lopcodes.h"
+#include "lstring.h"
+#include "lundump.h"
+
+#define	LoadBlock(b,size,Z)	ezread(Z,b,size)
+
+static void unexpectedEOZ (ZIO* Z)
+{
+ luaL_verror("unexpected end of file in %s",zname(Z));
+}
+
+static int ezgetc (ZIO* Z)
+{
+ int c=zgetc(Z);
+ if (c==EOZ) unexpectedEOZ(Z);
+ return c;
+}
+
+static void ezread (ZIO* Z, void* b, int n)
+{
+ int r=zread(Z,b,n);
+ if (r!=0) unexpectedEOZ(Z);
+}
+
+static unsigned int LoadWord (ZIO* Z)
+{
+ unsigned int hi=ezgetc(Z);
+ unsigned int lo=ezgetc(Z);
+ return (hi<<8)|lo;
+}
+
+static unsigned long LoadLong (ZIO* Z)
+{
+ unsigned long hi=LoadWord(Z);
+ unsigned long lo=LoadWord(Z);
+ return (hi<<16)|lo;
+}
+
+/*
+* convert number from text
+*/
+double luaU_str2d (char* b, char* where)
+{
+ int negative=(b[0]=='-');
+ double x=luaO_str2d(b+negative);
+ if (x<0) luaL_verror("cannot convert number '%s' in %s",b,where);
+ return negative ? -x : x;
+}
+
+static real LoadNumber (ZIO* Z, int native)
+{
+ real x;
+ if (native)
+ {
+  LoadBlock(&x,sizeof(x),Z);
+  return x;
+ }
+ else
+ {
+  char b[256];
+  int size=ezgetc(Z);
+  LoadBlock(b,size,Z);
+  b[size]=0;
+  return luaU_str2d(b,zname(Z));
+ }
+}
+
+static int LoadInt (ZIO* Z, char* message)
+{
+ unsigned long l=LoadLong(Z);
+ unsigned int i=l;
+ if (i!=l) luaL_verror(message,l,zname(Z));
+ return i;
+}
+
+#define PAD	5			/* two word operands plus opcode */
+
+static Byte* LoadCode (ZIO* Z)
+{
+ int size=LoadInt(Z,"code too long (%ld bytes) in %s");
+ Byte* b=luaM_malloc(size+PAD);
+ LoadBlock(b,size,Z);
+ if (b[size-1]!=ENDCODE) luaL_verror("bad code in %s",zname(Z));
+ memset(b+size,ENDCODE,PAD);		/* pad code for safety */
+ return b;
+}
+
+static TaggedString* LoadTString (ZIO* Z)
+{
+ long size=LoadLong(Z);
+ if (size==0)
+  return NULL;
+ else
+ {
+  char* s=luaL_openspace(size);
+  LoadBlock(s,size,Z);
+  return luaS_newlstr(s,size-1);
+ }
+}
+
+static void LoadLocals (TProtoFunc* tf, ZIO* Z)
+{
+ int i,n=LoadInt(Z,"too many locals (%ld) in %s");
+ if (n==0) return;
+ tf->locvars=luaM_newvector(n+1,LocVar);
+ for (i=0; i<n; i++)
+ {
+  tf->locvars[i].line=LoadInt(Z,"too many lines (%ld) in %s");
+  tf->locvars[i].varname=LoadTString(Z);
+ }
+ tf->locvars[i].line=-1;		/* flag end of vector */
+ tf->locvars[i].varname=NULL;
+}
+
+static TProtoFunc* LoadFunction (ZIO* Z, int native);
+
+static void LoadConstants (TProtoFunc* tf, ZIO* Z, int native)
+{
+ int i,n=LoadInt(Z,"too many constants (%ld) in %s");
+ tf->nconsts=n;
+ if (n==0) return;
+ tf->consts=luaM_newvector(n,TObject);
+ for (i=0; i<n; i++)
+ {
+  TObject* o=tf->consts+i;
+  ttype(o)=-ezgetc(Z);			/* ttype(o) is negative - ORDER LUA_T */
+  switch (ttype(o))
+  {
+   case LUA_T_NUMBER:
+	nvalue(o)=LoadNumber(Z,native);
+	break;
+   case LUA_T_STRING:
+	tsvalue(o)=LoadTString(Z);
+	break;
+   case LUA_T_PROTO:
+	tfvalue(o)=LoadFunction(Z,native);
+	break;
+   case LUA_T_NIL:
+	break;
+   default:				/* cannot happen */
+	luaU_badconstant("load",i,o,tf);
+	break;
+  }
+ }
+}
+
+static TProtoFunc* LoadFunction (ZIO* Z, int native)
+{
+ TProtoFunc* tf=luaF_newproto();
+ tf->lineDefined=LoadInt(Z,"lineDefined too large (%ld) in %s");
+ tf->source=LoadTString(Z);
+ if (tf->source==NULL) tf->source=luaS_new(zname(Z));
+ tf->code=LoadCode(Z);
+ LoadLocals(tf,Z);
+ LoadConstants(tf,Z,native);
+ return tf;
+}
+
+static void LoadSignature (ZIO* Z)
+{
+ char* s=SIGNATURE;
+ while (*s!=0 && ezgetc(Z)==*s)
+  ++s;
+ if (*s!=0) luaL_verror("bad signature in %s",zname(Z));
+}
+
+static int LoadHeader (ZIO* Z)
+{
+ int version,sizeofR;
+ int native;
+ LoadSignature(Z);
+ version=ezgetc(Z);
+ if (version>VERSION)
+  luaL_verror(
+	"%s too new: version=0x%02x; expected at most 0x%02x",
+	zname(Z),version,VERSION);
+ if (version<VERSION0)			/* check last major change */
+  luaL_verror(
+	"%s too old: version=0x%02x; expected at least 0x%02x",
+	zname(Z),version,VERSION0);
+ sizeofR=ezgetc(Z);
+ native=(sizeofR!=0);
+ if (native)				/* test number representation */
+ {
+  if (sizeofR!=sizeof(real))
+   luaL_verror("unknown number size in %s: read %d; expected %d",
+	 zname(Z),sizeofR,sizeof(real));
+  else
+  {
+   real tf=TEST_NUMBER;
+   real f=LoadNumber(Z,native);
+   if ((long)f!=(long)tf)
+    luaL_verror("unknown number format in %s: "
+	  "read " NUMBER_FMT "; expected " NUMBER_FMT,
+	  zname(Z),f,tf);
+  }
+ }
+ return native;
+}
+
+static TProtoFunc* LoadChunk (ZIO* Z)
+{
+ return LoadFunction(Z,LoadHeader(Z));
+}
+
+/*
+** load one chunk from a file or buffer
+** return main if ok and NULL at EOF
+*/
+TProtoFunc* luaU_undump1 (ZIO* Z)
+{
+ int c=zgetc(Z);
+ if (c==ID_CHUNK)
+  return LoadChunk(Z);
+ else if (c!=EOZ)
+  luaL_verror("%s is not a Lua binary file",zname(Z));
+ return NULL;
+}
+
+/*
+* handle constants that cannot happen
+*/
+void luaU_badconstant (char* s, int i, TObject* o, TProtoFunc* tf)
+{
+ int t=ttype(o);
+ char* name= (t>0 || t<LUA_T_LINE) ? "?" : luaO_typenames[-t];
+ luaL_verror("cannot %s constant #%d: type=%d [%s]" IN,s,i,t,name,INLOC);
+}

lundump.h

@@ -0,0 +1,39 @@
+/*
+** $Id: lundump.h,v 1.15 1999/07/02 19:34:26 lhf Exp $
+** load pre-compiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lundump_h
+#define lundump_h
+
+#include "lobject.h"
+#include "lzio.h"
+
+TProtoFunc* luaU_undump1 (ZIO* Z);	/* load one chunk */
+void luaU_badconstant (char* s, int i, TObject* o, TProtoFunc* tf);
+					/* handle cases that cannot happen */
+double luaU_str2d (char* b, char* where);
+					/* convert number from text */
+
+/* definitions for headers of binary files */
+#define	VERSION		0x32		/* last format change was in 3.2 */
+#define	VERSION0	0x32		/* last major  change was in 3.2 */
+#define ID_CHUNK	27		/* binary files start with ESC... */
+#define	SIGNATURE	"Lua"		/* ...followed by this signature */
+
+/* formats for error messages */
+#define SOURCE		"<%s:%d>"
+#define IN		" in %p " SOURCE
+#define INLOC		tf,tf->source->str,tf->lineDefined
+
+/* format for numbers in listings and error messages */
+#ifndef NUMBER_FMT
+#define NUMBER_FMT	"%.16g"		/* LUA_NUMBER */
+#endif
+
+/* a multiple of PI for testing native format */
+/* multiplying by 1E8 gives non-trivial integer values */
+#define	TEST_NUMBER	3.14159265358979323846E8
+
+#endif

lvm.c

@@ -0,0 +1,635 @@
+/*
+** $Id: lvm.c,v 1.57 1999/05/21 19:41:49 roberto Exp roberto $
+** Lua virtual machine
+** See Copyright Notice in lua.h
+*/
+
+
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lauxlib.h"
+#include "ldo.h"
+#include "lfunc.h"
+#include "lgc.h"
+#include "lmem.h"
+#include "lobject.h"
+#include "lopcodes.h"
+#include "lstate.h"
+#include "lstring.h"
+#include "ltable.h"
+#include "ltm.h"
+#include "luadebug.h"
+#include "lvm.h"
+
+
+#ifdef OLD_ANSI
+#define strcoll(a,b)	strcmp(a,b)
+#endif
+
+
+#define highbyte(x)	((x)<<8)
+
+
+/* Extra stack size to run a function: LUA_T_LINE(1), TM calls(2), ... */
+#define	EXTRA_STACK	5
+
+
+
+static TaggedString *strconc (TaggedString *l, TaggedString *r) {
+  long nl = l->u.s.len;
+  long nr = r->u.s.len;
+  char *buffer = luaL_openspace(nl+nr);
+  memcpy(buffer, l->str, nl);
+  memcpy(buffer+nl, r->str, nr);
+  return luaS_newlstr(buffer, nl+nr);
+}
+
+
+int luaV_tonumber (TObject *obj) {  /* LUA_NUMBER */
+  if (ttype(obj) != LUA_T_STRING)
+    return 1;
+  else {
+    double t;
+    char *e = svalue(obj);
+    int sig = 1;
+    while (isspace((unsigned char)*e)) e++;
+    if (*e == '-') {
+      e++;
+      sig = -1;
+    }
+    else if (*e == '+') e++;
+    /* no digit before or after decimal point? */
+    if (!isdigit((unsigned char)*e) && !isdigit((unsigned char)*(e+1)))
+      return 2;
+    t = luaO_str2d(e);
+    if (t<0) return 2;
+    nvalue(obj) = (real)t*sig;
+    ttype(obj) = LUA_T_NUMBER;
+    return 0;
+  }
+}
+
+
+int luaV_tostring (TObject *obj) {  /* LUA_NUMBER */
+  if (ttype(obj) != LUA_T_NUMBER)
+    return 1;
+  else {
+    char s[32];  /* 16 digits, signal, point and \0  (+ some extra...) */
+    sprintf(s, "%.16g", (double)nvalue(obj));
+    tsvalue(obj) = luaS_new(s);
+    ttype(obj) = LUA_T_STRING;
+    return 0;
+  }
+}
+
+
+void luaV_setn (Hash *t, int val) {
+  TObject index, value;
+  ttype(&index) = LUA_T_STRING; tsvalue(&index) = luaS_new("n");
+  ttype(&value) = LUA_T_NUMBER; nvalue(&value) = val;
+  luaH_set(t, &index, &value);
+}
+
+
+void luaV_closure (int nelems) {
+  if (nelems > 0) {
+    struct Stack *S = &L->stack;
+    Closure *c = luaF_newclosure(nelems);
+    c->consts[0] = *(S->top-1);
+    memcpy(&c->consts[1], S->top-(nelems+1), nelems*sizeof(TObject));
+    S->top -= nelems;
+    ttype(S->top-1) = LUA_T_CLOSURE;
+    (S->top-1)->value.cl = c;
+  }
+}
+
+
+/*
+** Function to index a table.
+** Receives the table at top-2 and the index at top-1.
+*/
+void luaV_gettable (void) {
+  TObject *table = L->stack.top-2;
+  TObject *im;
+  if (ttype(table) != LUA_T_ARRAY) {  /* not a table, get gettable method */
+    im = luaT_getimbyObj(table, IM_GETTABLE);
+    if (ttype(im) == LUA_T_NIL)
+      lua_error("indexed expression not a table");
+  }
+  else {  /* object is a table... */
+    int tg = table->value.a->htag;
+    im = luaT_getim(tg, IM_GETTABLE);
+    if (ttype(im) == LUA_T_NIL) {  /* and does not have a "gettable" method */
+      TObject *h = luaH_get(avalue(table), table+1);
+      if (ttype(h) == LUA_T_NIL &&
+          (ttype(im=luaT_getim(tg, IM_INDEX)) != LUA_T_NIL)) {
+        /* result is nil and there is an "index" tag method */
+        luaD_callTM(im, 2, 1);  /* calls it */
+      }
+      else {
+        L->stack.top--;
+        *table = *h;  /* "push" result into table position */
+      }
+      return;
+    }
+    /* else it has a "gettable" method, go through to next command */
+  }
+  /* object is not a table, or it has a "gettable" method */
+  luaD_callTM(im, 2, 1);
+}
+
+
+/*
+** Receives table at *t, index at *(t+1) and value at top.
+*/
+void luaV_settable (TObject *t) {
+  struct Stack *S = &L->stack;
+  TObject *im;
+  if (ttype(t) != LUA_T_ARRAY) {  /* not a table, get "settable" method */
+    im = luaT_getimbyObj(t, IM_SETTABLE);
+    if (ttype(im) == LUA_T_NIL)
+      lua_error("indexed expression not a table");
+  }
+  else {  /* object is a table... */
+    im = luaT_getim(avalue(t)->htag, IM_SETTABLE);
+    if (ttype(im) == LUA_T_NIL) {  /* and does not have a "settable" method */
+      luaH_set(avalue(t), t+1, S->top-1);
+      S->top--;  /* pop value */
+      return;
+    }
+    /* else it has a "settable" method, go through to next command */
+  }
+  /* object is not a table, or it has a "settable" method */
+  /* prepare arguments and call the tag method */
+  *(S->top+1) = *(L->stack.top-1);
+  *(S->top) = *(t+1);
+  *(S->top-1) = *t;
+  S->top += 2;  /* WARNING: caller must assure stack space */
+  luaD_callTM(im, 3, 0);
+}
+
+
+void luaV_rawsettable (TObject *t) {
+  if (ttype(t) != LUA_T_ARRAY)
+    lua_error("indexed expression not a table");
+  else {
+    struct Stack *S = &L->stack;
+    luaH_set(avalue(t), t+1, S->top-1);
+    S->top -= 3;
+  }
+}
+
+
+void luaV_getglobal (TaggedString *ts) {
+  /* WARNING: caller must assure stack space */
+  /* only userdata, tables and nil can have getglobal tag methods */
+  static char valid_getglobals[] = {1, 0, 0, 1, 0, 0, 1, 0};  /* ORDER LUA_T */
+  TObject *value = &ts->u.s.globalval;
+  if (valid_getglobals[-ttype(value)]) {
+    TObject *im = luaT_getimbyObj(value, IM_GETGLOBAL);
+    if (ttype(im) != LUA_T_NIL) {  /* is there a tag method? */
+      struct Stack *S = &L->stack;
+      ttype(S->top) = LUA_T_STRING;
+      tsvalue(S->top) = ts;
+      S->top++;
+      *S->top++ = *value;
+      luaD_callTM(im, 2, 1);
+      return;
+    }
+    /* else no tag method: go through to default behavior */
+  }
+  *L->stack.top++ = *value;  /* default behavior */
+}
+
+
+void luaV_setglobal (TaggedString *ts) {
+  TObject *oldvalue = &ts->u.s.globalval;
+  TObject *im = luaT_getimbyObj(oldvalue, IM_SETGLOBAL);
+  if (ttype(im) == LUA_T_NIL)  /* is there a tag method? */
+    luaS_rawsetglobal(ts, --L->stack.top);
+  else {
+    /* WARNING: caller must assure stack space */
+    struct Stack *S = &L->stack;
+    TObject newvalue;
+    newvalue = *(S->top-1);
+    ttype(S->top-1) = LUA_T_STRING;
+    tsvalue(S->top-1) = ts;
+    *S->top++ = *oldvalue;
+    *S->top++ = newvalue;
+    luaD_callTM(im, 3, 0);
+  }
+}
+
+
+static void call_binTM (IMS event, char *msg)
+{
+  TObject *im = luaT_getimbyObj(L->stack.top-2, event);/* try first operand */
+  if (ttype(im) == LUA_T_NIL) {
+    im = luaT_getimbyObj(L->stack.top-1, event);  /* try second operand */
+    if (ttype(im) == LUA_T_NIL) {
+      im = luaT_getim(0, event);  /* try a 'global' i.m. */
+      if (ttype(im) == LUA_T_NIL)
+        lua_error(msg);
+    }
+  }
+  lua_pushstring(luaT_eventname[event]);
+  luaD_callTM(im, 3, 1);
+}
+
+
+static void call_arith (IMS event)
+{
+  call_binTM(event, "unexpected type in arithmetic operation");
+}
+
+
+static int luaV_strcomp (char *l, long ll, char *r, long lr)
+{
+  for (;;) {
+    long temp = strcoll(l, r);
+    if (temp != 0) return temp;
+    /* strings are equal up to a '\0' */
+    temp = strlen(l);  /* index of first '\0' in both strings */
+    if (temp == ll)  /* l is finished? */
+      return (temp == lr) ? 0 : -1;  /* l is equal or smaller than r */
+    else if (temp == lr)  /* r is finished? */
+      return 1;  /* l is greater than r (because l is not finished) */
+    /* both strings longer than temp; go on comparing (after the '\0') */
+    temp++;
+    l += temp; ll -= temp; r += temp; lr -= temp;
+  }
+}
+
+void luaV_comparison (lua_Type ttype_less, lua_Type ttype_equal,
+                      lua_Type ttype_great, IMS op) {
+  struct Stack *S = &L->stack;
+  TObject *l = S->top-2;
+  TObject *r = S->top-1;
+  real result;
+  if (ttype(l) == LUA_T_NUMBER && ttype(r) == LUA_T_NUMBER)
+    result = nvalue(l)-nvalue(r);
+  else if (ttype(l) == LUA_T_STRING && ttype(r) == LUA_T_STRING)
+    result = luaV_strcomp(svalue(l), tsvalue(l)->u.s.len,
+                          svalue(r), tsvalue(r)->u.s.len);
+  else {
+    call_binTM(op, "unexpected type in comparison");
+    return;
+  }
+  S->top--;
+  nvalue(S->top-1) = 1;
+  ttype(S->top-1) = (result < 0) ? ttype_less :
+                                (result == 0) ? ttype_equal : ttype_great;
+}
+
+
+void luaV_pack (StkId firstel, int nvararg, TObject *tab) {
+  TObject *firstelem = L->stack.stack+firstel;
+  int i;
+  Hash *htab;
+  if (nvararg < 0) nvararg = 0;
+  htab = avalue(tab) = luaH_new(nvararg+1);  /* +1 for field 'n' */
+  ttype(tab) = LUA_T_ARRAY;
+  for (i=0; i<nvararg; i++)
+    luaH_setint(htab, i+1, firstelem+i);
+  luaV_setn(htab, nvararg);  /* store counter in field "n" */
+}
+
+
+static void adjust_varargs (StkId first_extra_arg)
+{
+  TObject arg;
+  luaV_pack(first_extra_arg,
+       (L->stack.top-L->stack.stack)-first_extra_arg, &arg);
+  luaD_adjusttop(first_extra_arg);
+  *L->stack.top++ = arg;
+}
+
+
+
+/*
+** Execute the given opcode, until a RET. Parameters are between
+** [stack+base,top). Returns n such that the the results are between
+** [stack+n,top).
+*/
+StkId luaV_execute (Closure *cl, TProtoFunc *tf, StkId base) {
+  struct Stack *S = &L->stack;  /* to optimize */
+  register Byte *pc = tf->code;
+  TObject *consts = tf->consts;
+  if (L->callhook)
+    luaD_callHook(base, tf, 0);
+  luaD_checkstack((*pc++)+EXTRA_STACK);
+  if (*pc < ZEROVARARG)
+    luaD_adjusttop(base+*(pc++));
+  else {  /* varargs */
+    luaC_checkGC();
+    adjust_varargs(base+(*pc++)-ZEROVARARG);
+  }
+  for (;;) {
+    register int aux = 0;
+    switchentry:
+    switch ((OpCode)*pc++) {
+
+      case ENDCODE:
+        S->top = S->stack + base;
+        goto ret;
+        
+      case RETCODE:
+        base += *pc++;
+        goto ret;
+
+      case CALL: aux = *pc++;
+        luaD_calln(*pc++, aux);
+        break;
+
+      case TAILCALL: aux = *pc++;
+        luaD_calln(*pc++, MULT_RET);
+        base += aux;
+        goto ret;
+
+      case PUSHNIL: aux = *pc++;
+        do {
+          ttype(S->top++) = LUA_T_NIL;
+        } while (aux--);
+        break;
+
+      case POP: aux = *pc++;
+        S->top -= aux;
+        break;
+
+      case PUSHNUMBERW: aux += highbyte(*pc++);
+      case PUSHNUMBER:  aux += *pc++;
+        ttype(S->top) = LUA_T_NUMBER;
+        nvalue(S->top) = aux;
+        S->top++;
+        break;
+
+      case PUSHNUMBERNEGW: aux += highbyte(*pc++);
+      case PUSHNUMBERNEG:  aux += *pc++;
+        ttype(S->top) = LUA_T_NUMBER;
+        nvalue(S->top) = -aux;
+        S->top++;
+        break;
+
+      case PUSHCONSTANTW: aux += highbyte(*pc++);
+      case PUSHCONSTANT:  aux += *pc++;
+        *S->top++ = consts[aux];
+        break;
+
+      case PUSHUPVALUE: aux = *pc++;
+        *S->top++ = cl->consts[aux+1];
+        break;
+
+      case PUSHLOCAL: aux = *pc++;
+        *S->top++ = *((S->stack+base) + aux);
+        break;
+
+      case GETGLOBALW: aux += highbyte(*pc++);
+      case GETGLOBAL:  aux += *pc++;
+        luaV_getglobal(tsvalue(&consts[aux]));
+        break;
+
+      case GETTABLE:
+        luaV_gettable();
+        break;
+
+      case GETDOTTEDW: aux += highbyte(*pc++);
+      case GETDOTTED:  aux += *pc++;
+        *S->top++ = consts[aux];
+        luaV_gettable();
+        break;
+
+      case PUSHSELFW: aux += highbyte(*pc++);
+      case PUSHSELF:  aux += *pc++; {
+        TObject receiver;
+        receiver = *(S->top-1);
+        *S->top++ = consts[aux];
+        luaV_gettable();
+        *S->top++ = receiver;
+        break;
+      }
+
+      case CREATEARRAYW: aux += highbyte(*pc++);
+      case CREATEARRAY:  aux += *pc++;
+        luaC_checkGC();
+        avalue(S->top) = luaH_new(aux);
+        ttype(S->top) = LUA_T_ARRAY;
+        S->top++;
+        break;
+
+      case SETLOCAL: aux = *pc++;
+        *((S->stack+base) + aux) = *(--S->top);
+        break;
+
+      case SETGLOBALW: aux += highbyte(*pc++);
+      case SETGLOBAL:  aux += *pc++;
+        luaV_setglobal(tsvalue(&consts[aux]));
+        break;
+
+      case SETTABLEPOP:
+        luaV_settable(S->top-3);
+        S->top -= 2;  /* pop table and index */
+        break;
+
+      case SETTABLE:
+        luaV_settable(S->top-3-(*pc++));
+        break;
+
+      case SETLISTW: aux += highbyte(*pc++);
+      case SETLIST:  aux += *pc++; {
+        int n = *(pc++);
+        Hash *arr = avalue(S->top-n-1);
+        aux *= LFIELDS_PER_FLUSH;
+        for (; n; n--)
+          luaH_setint(arr, n+aux, --S->top);
+        break;
+      }
+
+      case SETMAP:  aux = *pc++; {
+        Hash *arr = avalue(S->top-(2*aux)-3);
+        do {
+          luaH_set(arr, S->top-2, S->top-1);
+          S->top-=2;
+        } while (aux--);
+        break;
+      }
+
+      case NEQOP: aux = 1;
+      case EQOP: {
+        int res = luaO_equalObj(S->top-2, S->top-1);
+        if (aux) res = !res;
+        S->top--;
+        ttype(S->top-1) = res ? LUA_T_NUMBER : LUA_T_NIL;
+        nvalue(S->top-1) = 1;
+        break;
+      }
+
+       case LTOP:
+         luaV_comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, IM_LT);
+         break;
+
+      case LEOP:
+        luaV_comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, IM_LE);
+        break;
+
+      case GTOP:
+        luaV_comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, IM_GT);
+        break;
+
+      case GEOP:
+        luaV_comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, IM_GE);
+        break;
+
+      case ADDOP: {
+        TObject *l = S->top-2;
+        TObject *r = S->top-1;
+        if (tonumber(r) || tonumber(l))
+          call_arith(IM_ADD);
+        else {
+          nvalue(l) += nvalue(r);
+          --S->top;
+        }
+        break;
+      }
+
+      case SUBOP: {
+        TObject *l = S->top-2;
+        TObject *r = S->top-1;
+        if (tonumber(r) || tonumber(l))
+          call_arith(IM_SUB);
+        else {
+          nvalue(l) -= nvalue(r);
+          --S->top;
+        }
+        break;
+      }
+
+      case MULTOP: {
+        TObject *l = S->top-2;
+        TObject *r = S->top-1;
+        if (tonumber(r) || tonumber(l))
+          call_arith(IM_MUL);
+        else {
+          nvalue(l) *= nvalue(r);
+          --S->top;
+        }
+        break;
+      }
+
+      case DIVOP: {
+        TObject *l = S->top-2;
+        TObject *r = S->top-1;
+        if (tonumber(r) || tonumber(l))
+          call_arith(IM_DIV);
+        else {
+          nvalue(l) /= nvalue(r);
+          --S->top;
+        }
+        break;
+      }
+
+      case POWOP:
+        call_binTM(IM_POW, "undefined operation");
+        break;
+
+      case CONCOP: {
+        TObject *l = S->top-2;
+        TObject *r = S->top-1;
+        if (tostring(l) || tostring(r))
+          call_binTM(IM_CONCAT, "unexpected type for concatenation");
+        else {
+          tsvalue(l) = strconc(tsvalue(l), tsvalue(r));
+          --S->top;
+        }
+        luaC_checkGC();
+        break;
+      }
+
+      case MINUSOP:
+        if (tonumber(S->top-1)) {
+          ttype(S->top) = LUA_T_NIL;
+          S->top++;
+          call_arith(IM_UNM);
+        }
+        else
+          nvalue(S->top-1) = - nvalue(S->top-1);
+        break;
+
+      case NOTOP:
+        ttype(S->top-1) =
+           (ttype(S->top-1) == LUA_T_NIL) ? LUA_T_NUMBER : LUA_T_NIL;
+        nvalue(S->top-1) = 1;
+        break;
+
+      case ONTJMPW: aux += highbyte(*pc++);
+      case ONTJMP:  aux += *pc++;
+        if (ttype(S->top-1) != LUA_T_NIL) pc += aux;
+        else S->top--;
+        break;
+
+      case ONFJMPW: aux += highbyte(*pc++);
+      case ONFJMP:  aux += *pc++;
+        if (ttype(S->top-1) == LUA_T_NIL) pc += aux;
+        else S->top--;
+        break;
+
+      case JMPW: aux += highbyte(*pc++);
+      case JMP:  aux += *pc++;
+        pc += aux;
+        break;
+
+      case IFFJMPW: aux += highbyte(*pc++);
+      case IFFJMP:  aux += *pc++;
+        if (ttype(--S->top) == LUA_T_NIL) pc += aux;
+        break;
+
+      case IFTUPJMPW: aux += highbyte(*pc++);
+      case IFTUPJMP:  aux += *pc++;
+        if (ttype(--S->top) != LUA_T_NIL) pc -= aux;
+        break;
+
+      case IFFUPJMPW: aux += highbyte(*pc++);
+      case IFFUPJMP:  aux += *pc++;
+        if (ttype(--S->top) == LUA_T_NIL) pc -= aux;
+        break;
+
+      case CLOSUREW: aux += highbyte(*pc++);
+      case CLOSURE:  aux += *pc++;
+        *S->top++ = consts[aux];
+        luaV_closure(*pc++);
+        luaC_checkGC();
+        break;
+
+      case SETLINEW: aux += highbyte(*pc++);
+      case SETLINE:  aux += *pc++;
+        if ((S->stack+base-1)->ttype != LUA_T_LINE) {
+          /* open space for LINE value */
+          luaD_openstack((S->top-S->stack)-base);
+          base++;
+          (S->stack+base-1)->ttype = LUA_T_LINE;
+        }
+        (S->stack+base-1)->value.i = aux;
+        if (L->linehook)
+          luaD_lineHook(aux);
+        break;
+
+      case LONGARGW: aux += highbyte(*pc++);
+      case LONGARG:  aux += *pc++;
+        aux = highbyte(highbyte(aux));
+        goto switchentry;  /* do not reset "aux" */
+
+      case CHECKSTACK: aux = *pc++;
+        LUA_ASSERT((S->top-S->stack)-base == aux && S->last >= S->top,
+                   "wrong stack size");
+        break;
+
+    }
+  } ret:
+  if (L->callhook)
+    luaD_callHook(0, NULL, 1);
+  return base;
+}
+

lvm.h

@@ -0,0 +1,34 @@
+/*
+** $Id: lvm.h,v 1.7 1998/12/30 17:26:49 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 tonumber(o) ((ttype(o) != LUA_T_NUMBER) && (luaV_tonumber(o) != 0))
+#define tostring(o) ((ttype(o) != LUA_T_STRING) && (luaV_tostring(o) != 0))
+
+
+void luaV_pack (StkId firstel, int nvararg, TObject *tab);
+int luaV_tonumber (TObject *obj);
+int luaV_tostring (TObject *obj);
+void luaV_setn (Hash *t, int val);
+void luaV_gettable (void);
+void luaV_settable (TObject *t);
+void luaV_rawsettable (TObject *t);
+void luaV_getglobal (TaggedString *ts);
+void luaV_setglobal (TaggedString *ts);
+StkId luaV_execute (Closure *cl, TProtoFunc *tf, StkId base);
+void luaV_closure (int nelems);
+void luaV_comparison (lua_Type ttype_less, lua_Type ttype_equal,
+                      lua_Type ttype_great, IMS op);
+
+#endif

lzio.c

@@ -0,0 +1,84 @@
+/*
+** $Id: lzio.c,v 1.6 1999/03/04 14:49:18 roberto Exp roberto $
+** a generic input stream interface
+** See Copyright Notice in lua.h
+*/
+
+
+
+#include <stdio.h>
+#include <string.h>
+
+#include "lzio.h"
+
+
+
+/* ----------------------------------------------------- memory buffers --- */
+
+static int zmfilbuf (ZIO* z) {
+ return EOZ;
+}
+
+
+ZIO* zmopen (ZIO* z, char* b, int size, char *name)
+{
+ if (b==NULL) return NULL;
+ z->n=size;
+ z->p= (unsigned char *)b;
+ z->filbuf=zmfilbuf;
+ z->u=NULL;
+ z->name=name;
+ return z;
+}
+
+/* ------------------------------------------------------------ strings --- */
+
+ZIO* zsopen (ZIO* z, char* s, char *name)
+{
+ if (s==NULL) return NULL;
+ return zmopen(z,s,strlen(s),name);
+}
+
+/* -------------------------------------------------------------- FILEs --- */
+
+static int zffilbuf (ZIO* z) {
+ int n;
+ if (feof((FILE *)z->u)) return EOZ;
+ n=fread(z->buffer,1,ZBSIZE,z->u);
+ if (n==0) return EOZ;
+ z->n=n-1;
+ z->p=z->buffer;
+ return *(z->p++);
+}
+
+
+ZIO* zFopen (ZIO* z, FILE* f, char *name)
+{
+ if (f==NULL) return NULL;
+ z->n=0;
+ z->p=z->buffer;
+ z->filbuf=zffilbuf;
+ z->u=f;
+ z->name=name;
+ return z;
+}
+
+
+/* --------------------------------------------------------------- read --- */
+int zread (ZIO *z, void *b, int n) {
+  while (n) {
+    int m;
+    if (z->n == 0) {
+      if (z->filbuf(z) == EOZ)
+        return n;  /* return number of missing bytes */
+      zungetc(z);  /* put result from 'filbuf' in the buffer */
+    }
+    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;
+}

lzio.h

@@ -0,0 +1,50 @@
+/*
+** $Id: lzio.h,v 1.3 1997/12/22 20:57:18 roberto Exp roberto $
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lzio_h
+#define lzio_h
+
+#include <stdio.h>
+
+
+
+/* For Lua only */
+#define zFopen	luaZ_Fopen
+#define zsopen	luaZ_sopen
+#define zmopen	luaZ_mopen
+#define zread	luaZ_read
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct zio ZIO;
+
+ZIO* zFopen (ZIO* z, FILE* f, char *name);		/* open FILEs */
+ZIO* zsopen (ZIO* z, char* s, char *name);		/* string */
+ZIO* zmopen (ZIO* z, char* b, int size, char *name);	/* memory */
+
+int zread (ZIO* z, void* b, int n);	/* read next n bytes */
+
+#define zgetc(z)	(--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
+#define zungetc(z)	(++(z)->n,--(z)->p)
+#define zname(z)	((z)->name)
+
+
+/* --------- Private Part ------------------ */
+
+#define ZBSIZE	256			/* buffer size */
+
+struct zio {
+ int n;					/* bytes still unread */
+ unsigned char* p;			/* current position in buffer */
+ int (*filbuf)(ZIO* z);
+ void* u;				/* additional data */
+ char *name;
+ unsigned char buffer[ZBSIZE];		/* buffer */
+};
+
+
+#endif

makefile

@@ -1,46 +1,82 @@
-# $Id: makefile,v 1.15 1995/10/17 18:16:58 roberto Exp roberto $
+#
+## $Id: makefile,v 1.18 1999/02/23 15:01:29 roberto Exp roberto $
+## Makefile
+## See Copyright Notice in lua.h
+#
 
-#configuration
+
+#CONFIGURATION
 
 # define (undefine) POPEN if your system (does not) support piped I/O
-CONFIG = -DPOPEN
+#
+# define (undefine) _POSIX_SOURCE if your system is (not) POSIX compliant
+#
+# define (undefine) OLD_ANSI if your system does NOT have some new ANSI
+# facilities (e.g. strerror, locale.h, memmove). SunOS does not comply;
+# so, add "-DOLD_ANSI" on SunOS
+#
+# define LUA_COMPAT2_5 if yous system does need to be compatible with
+# version 2.5 (or older)
+#
+# define LUA_NUM_TYPE if you need numbers to be different from double
+# (for instance, -DLUA_NUM_TYPE=float)
+#
+
+CONFIG = -DPOPEN -D_POSIX_SOURCE
+#CONFIG = -DLUA_COMPAT2_5 -DOLD_ANSI -DDEBUG
+
+
 # Compilation parameters
 CC = gcc
-CFLAGS = $(CONFIG) -I/usr/5include -Wall -Wmissing-prototypes -Wshadow -ansi -O2
+CWARNS = -Wall -Wmissing-prototypes -Wshadow -pedantic -Wpointer-arith -Wcast-align -Waggregate-return
+CFLAGS = $(CONFIG) $(CWARNS) -ansi -O2
+
+
+# To make early versions
+CO_OPTIONS =
 
-#CC = acc
-#CFLAGS = -fast -I/usr/5include
 
 AR = ar
 ARFLAGS	= rvl
 
+
 # Aplication modules
 LUAOBJS = \
-	parser.o \
-	lex.o \
-	opcode.o \
-	hash.o \
-	table.o \
-	inout.o \
-	tree.o \
-	fallback.o \
-	mem.o \
-	func.o
+	lapi.o \
+	lauxlib.o \
+	lbuffer.o \
+	lbuiltin.o \
+	ldo.o \
+	lfunc.o \
+	lgc.o \
+	llex.o \
+	lmem.o \
+	lobject.o \
+	lparser.o \
+	lstate.o \
+	lstring.o \
+	ltable.o \
+	ltm.o \
+	lvm.o \
+	lundump.o \
+	lzio.o
 
 LIBOBJS = 	\
-	iolib.o \
-	mathlib.o \
-	strlib.o
+	liolib.o \
+	lmathlib.o \
+	lstrlib.o \
+	ldblib.o \
+	linit.o
 
 
-lua : lua.o lua.a lualib.a
-	$(CC) $(CFLAGS) -o $@ lua.o lua.a lualib.a -lm
+lua : lua.o liblua.a liblualib.a
+	$(CC) $(CFLAGS) -o $@ lua.o -L. -llua -llualib -lm
 
-lua.a : parser.o $(LUAOBJS)
+liblua.a : $(LUAOBJS)
 	$(AR) $(ARFLAGS) $@  $?
-	ranlib lua.a
+	ranlib $@
 
-lualib.a : $(LIBOBJS)
+liblualib.a : $(LIBOBJS)
 	$(AR) $(ARFLAGS) $@  $?
 	ranlib $@
 
@@ -48,35 +84,57 @@ liblua.so.1.0 : lua.o
 	ld -o liblua.so.1.0 $(LUAOBJS)
 
 
-parser.c : lua.stx
-	yacc++ -d lua.stx ; mv -f y.tab.c parser.c ; mv -f y.tab.h parser.h
-
 clear	:
 	rcsclean
 	rm -f *.o
-	rm -f parser.c parser.h
-	co lua.h lualib.h luadebug.h
-
-% : RCS/%,v
-	co $@
+	rm -f
+	co $(CO_OPTIONS) lua.h lualib.h luadebug.h
 
 
-fallback.o : fallback.c mem.h fallback.h opcode.h lua.h types.h tree.h func.h 
-func.o : func.c table.h tree.h types.h opcode.h lua.h func.h mem.h 
-hash.o : hash.c mem.h opcode.h lua.h types.h tree.h func.h hash.h table.h 
-inout.o : inout.c mem.h opcode.h lua.h types.h tree.h func.h hash.h inout.h \
-  table.h 
-iolib.o : iolib.c lua.h lualib.h luadebug.h
-lex.o : lex.c mem.h tree.h types.h table.h opcode.h lua.h func.h inout.h parser.h \
-  ugly.h 
-lua.o : lua.c lua.h lualib.h 
-mathlib.o : mathlib.c lualib.h lua.h 
-mem.o : mem.c mem.h lua.h 
-opcode.o : opcode.c mem.h opcode.h lua.h types.h tree.h func.h hash.h inout.h \
-  table.h fallback.h luadebug.h
-parser.o : parser.c mem.h opcode.h lua.h types.h tree.h func.h hash.h inout.h \
-  table.h 
-strlib.o : strlib.c lua.h lualib.h 
-table.o : table.c mem.h opcode.h lua.h types.h tree.h func.h hash.h table.h \
-  inout.h fallback.h 
-tree.o : tree.c mem.h lua.h tree.h types.h table.h opcode.h func.h 
+%.h : RCS/%.h,v
+	co $(CO_OPTIONS) $@
+
+%.c : RCS/%.c,v
+	co $(CO_OPTIONS) $@
+
+
+lapi.o: lapi.c lapi.h lua.h lobject.h lauxlib.h ldo.h lstate.h \
+ luadebug.h lfunc.h lgc.h lmem.h lstring.h ltable.h ltm.h lvm.h
+lauxlib.o: lauxlib.c lauxlib.h lua.h luadebug.h
+lbuffer.o: lbuffer.c lauxlib.h lua.h lmem.h lstate.h lobject.h \
+ luadebug.h
+lbuiltin.o: lbuiltin.c lapi.h lua.h lobject.h lauxlib.h lbuiltin.h \
+ ldo.h lstate.h luadebug.h lfunc.h lmem.h lstring.h ltable.h ltm.h \
+ lundump.h lzio.h lvm.h
+ldblib.o: ldblib.c lauxlib.h lua.h luadebug.h lualib.h
+ldo.o: ldo.c ldo.h lobject.h lua.h lstate.h luadebug.h lfunc.h lgc.h \
+ lmem.h lparser.h lzio.h lstring.h ltm.h lundump.h lvm.h
+lfunc.o: lfunc.c lfunc.h lobject.h lua.h lmem.h lstate.h luadebug.h
+lgc.o: lgc.c ldo.h lobject.h lua.h lstate.h luadebug.h lfunc.h lgc.h \
+ lmem.h lstring.h ltable.h ltm.h
+linit.o: linit.c lua.h lualib.h
+liolib.o: liolib.c lauxlib.h lua.h luadebug.h lualib.h
+llex.o: llex.c lauxlib.h lua.h llex.h lobject.h lzio.h lmem.h \
+ lparser.h lstate.h luadebug.h lstring.h
+lmathlib.o: lmathlib.c lauxlib.h lua.h lualib.h
+lmem.o: lmem.c lmem.h lstate.h lobject.h lua.h luadebug.h
+lobject.o: lobject.c lobject.h lua.h
+lparser.o: lparser.c lauxlib.h lua.h ldo.h lobject.h lstate.h \
+ luadebug.h lfunc.h llex.h lzio.h lmem.h lopcodes.h lparser.h \
+ lstring.h
+lstate.o: lstate.c lbuiltin.h ldo.h lobject.h lua.h lstate.h \
+ luadebug.h lfunc.h lgc.h llex.h lzio.h lmem.h lstring.h ltable.h \
+ ltm.h
+lstring.o: lstring.c lmem.h lobject.h lua.h lstate.h luadebug.h \
+ lstring.h
+lstrlib.o: lstrlib.c lauxlib.h lua.h lualib.h
+ltable.o: ltable.c lauxlib.h lua.h lmem.h lobject.h lstate.h \
+ luadebug.h ltable.h
+ltm.o: ltm.c lauxlib.h lua.h lmem.h lobject.h lstate.h luadebug.h \
+ ltm.h
+lua.o: lua.c lua.h luadebug.h lualib.h
+lundump.o: lundump.c lauxlib.h lua.h lfunc.h lobject.h lmem.h \
+ lstring.h lundump.h lzio.h
+lvm.o: lvm.c lauxlib.h lua.h ldo.h lobject.h lstate.h luadebug.h \
+ lfunc.h lgc.h lmem.h lopcodes.h lstring.h ltable.h ltm.h lvm.h
+lzio.o: lzio.c lzio.h

mathlib.c

@@ -1,212 +0,0 @@
-/*
-** mathlib.c
-** Mathematics library to LUA
-*/
-
-char *rcs_mathlib="$Id: mathlib.c,v 1.12 1995/10/09 12:48:38 roberto Exp roberto $";
-
-#include <stdio.h>		/* NULL */
-#include <math.h>
-
-#include "lualib.h"
-#include "lua.h"
-
-#ifndef PI
-#define PI          3.14159265358979323846
-#endif
-#define TODEGREE(a) ((a)*180.0/PI)
-#define TORAD(a)    ((a)*PI/180.0)
-
-static void math_abs (void)
-{
- double d = lua_check_number(1, "abs"); 
- if (d < 0) d = -d;
- lua_pushnumber (d);
-}
-
-
-static void math_sin (void)
-{
- double d = lua_check_number(1, "sin");
- lua_pushnumber (sin(TORAD(d)));
-}
-
-
-
-static void math_cos (void)
-{
- double d = lua_check_number(1, "cos");
- lua_pushnumber (cos(TORAD(d)));
-}
-
-
-
-static void math_tan (void)
-{
- double d = lua_check_number(1, "tan");
- lua_pushnumber (tan(TORAD(d)));
-}
-
-
-static void math_asin (void)
-{
- double d = lua_check_number(1, "asin");
- lua_pushnumber (TODEGREE(asin(d)));
-}
-
-
-static void math_acos (void)
-{
- double d = lua_check_number(1, "acos");
- lua_pushnumber (TODEGREE(acos(d)));
-}
-
-
-static void math_atan (void)
-{
- double d = lua_check_number(1, "atan");
- lua_pushnumber (TODEGREE(atan(d)));
-}
-
-
-static void math_atan2 (void)
-{
- double d1 = lua_check_number(1, "atan2");
- double d2 = lua_check_number(2, "atan2");
- lua_pushnumber (TODEGREE(atan2(d1, d2)));
-}
-
-
-static void math_ceil (void)
-{
- double d = lua_check_number(1, "ceil");
- lua_pushnumber (ceil(d));
-}
-
-
-static void math_floor (void)
-{
- double d = lua_check_number(1, "floor");
- lua_pushnumber (floor(d));
-}
-
-static void math_mod (void)
-{
- int d1 = (int)lua_check_number(1, "mod");
- int d2 = (int)lua_check_number(2, "mod");
- lua_pushnumber (d1%d2);
-}
-
-
-static void math_sqrt (void)
-{
- double d = lua_check_number(1, "sqrt");
- lua_pushnumber (sqrt(d));
-}
-
-static int old_pow;
-
-static void math_pow (void)
-{
- lua_Object o1 = lua_getparam (1);
- lua_Object o2 = lua_getparam (2);
- lua_Object op = lua_getparam(3);
- if (!lua_isnumber(o1) || !lua_isnumber(o2) || *(lua_getstring(op)) != 'p')
- {
-   lua_Object old = lua_getlocked(old_pow);
-   lua_pushobject(o1);
-   lua_pushobject(o2);
-   lua_pushobject(op);
-   if (lua_callfunction(old) != 0)
-     lua_error(NULL);
- }
- else
- {
-   double d1 = lua_getnumber(o1);
-   double d2 = lua_getnumber(o2);
-   lua_pushnumber (pow(d1,d2));
- }
-}
-
-static void math_min (void)
-{
- int i=1;
- double dmin = lua_check_number(i, "min");
- while (lua_getparam(++i) != LUA_NOOBJECT)
- {
-  double d = lua_check_number(i, "min");
-  if (d < dmin) dmin = d;
- }
- lua_pushnumber (dmin);
-}
-
-static void math_max (void)
-{
- int i=1;
- double dmax = lua_check_number(i, "max");
- while (lua_getparam(++i) != LUA_NOOBJECT)
- {
-  double d = lua_check_number(i, "max");
-  if (d > dmax) dmax = d;
- }
- lua_pushnumber (dmax);
-}
-
-static void math_log (void)
-{
- double d = lua_check_number(1, "log");
- lua_pushnumber (log(d));
-}
-
-
-static void math_log10 (void)
-{
- double d = lua_check_number(1, "log10");
- lua_pushnumber (log10(d));
-}
-
-
-static void math_exp (void)
-{
- double d = lua_check_number(1, "exp");
- lua_pushnumber (exp(d));
-}
-
-static void math_deg (void)
-{
- float d = lua_check_number(1, "deg");
- lua_pushnumber (d*180./PI);
-}
-
-static void math_rad (void)
-{
- float d = lua_check_number(1, "rad");
- lua_pushnumber (d/180.*PI);
-}
-
-/*
-** 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 ("atan2",  math_atan2);
- lua_register ("ceil",  math_ceil);
- lua_register ("floor", math_floor);
- lua_register ("mod",   math_mod);
- lua_register ("sqrt",  math_sqrt);
- lua_register ("min",   math_min);
- lua_register ("max",   math_max);
- lua_register ("log",   math_log);
- lua_register ("log10", math_log10);
- lua_register ("exp",   math_exp);
- lua_register ("deg",   math_deg);
- lua_register ("rad",   math_rad);
- old_pow = lua_lockobject(lua_setfallback("arith", math_pow));
-}

mathlib.h

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

opcode.h

@@ -1,157 +0,0 @@
-/*
-** TeCGraf - PUC-Rio
-** $Id: opcode.h,v 3.13 1995/10/17 11:58:41 roberto Exp roberto $
-*/
-
-#ifndef opcode_h
-#define opcode_h
-
-#include "lua.h"
-#include "types.h"
-#include "tree.h"
-#include "func.h"
-
-#ifndef real
-#define real float
-#endif
-
-#define FIELDS_PER_FLUSH 40
-
-
-typedef enum 
-{ 
- PUSHNIL,
- PUSH0, PUSH1, PUSH2,
- PUSHBYTE,
- PUSHWORD,
- PUSHFLOAT,
- PUSHSTRING,
- PUSHFUNCTION,
- PUSHLOCAL0, PUSHLOCAL1, PUSHLOCAL2, PUSHLOCAL3, PUSHLOCAL4,
- PUSHLOCAL5, PUSHLOCAL6, PUSHLOCAL7, PUSHLOCAL8, PUSHLOCAL9,
- PUSHLOCAL,
- PUSHGLOBAL,
- PUSHINDEXED,
- PUSHSELF,
- STORELOCAL0, STORELOCAL1, STORELOCAL2, STORELOCAL3, STORELOCAL4,
- STORELOCAL5, STORELOCAL6, STORELOCAL7, STORELOCAL8, STORELOCAL9,
- STORELOCAL,
- STOREGLOBAL,
- STOREINDEXED0,
- STOREINDEXED,
- STORELIST0,
- STORELIST,
- STORERECORD,
- ADJUST0,
- ADJUST,
- CREATEARRAY,
- EQOP,
- LTOP,
- LEOP,
- GTOP,
- GEOP,
- ADDOP,
- SUBOP,
- MULTOP,
- DIVOP,
- POWOP,
- CONCOP,
- MINUSOP,
- NOTOP,
- ONTJMP,
- ONFJMP,
- JMP,
- UPJMP,
- IFFJMP,
- IFFUPJMP,
- POP,
- CALLFUNC,
- RETCODE0,
- RETCODE,
- SETLINE
-} OpCode;
-
-#define MULT_RET	255
-
-
-typedef void (*Cfunction) (void);
-typedef int  (*Input) (void);
-
-typedef union
-{
- Cfunction     f;
- real          n;
- TaggedString *ts;
- TFunc         *tf;
- struct Hash    *a;
- void           *u;
- int	       i;
-} Value;
-
-typedef struct Object
-{
- lua_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.ts->str)
-#define tsvalue(o)	((o)->value.ts)
-#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_avalue(i)	(avalue(&s_object(i)))
-#define s_fvalue(i)	(fvalue(&s_object(i)))
-#define s_uvalue(i)	(uvalue(&s_object(i)))
-
-typedef union
-{
- struct {char c1; char c2;} m;
- Word w;
-} CodeWord;
-#define get_word(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;}
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- float f;
-} CodeFloat;
-#define get_float(code,pc)   {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- TFunc *tf;
-} CodeCode;
-#define get_code(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
-
-
-/* Exported functions */
-char   *lua_strdup (char *l);
-
-void    lua_setinput   (Input fn);	/* from "lex.c" module */
-char   *lua_lasttext   (void);		/* from "lex.c" module */
-int     yylex (void);		        /* from "lex.c" module */
-void    lua_parse      (TFunc *tf);	/* from "lua.stx" module */
-void	luaI_codedebugline (int line);  /* from "lua.stx" module */
-void    lua_travstack (int (*fn)(Object *));
-Object *luaI_Address (lua_Object o);
-void	luaI_pushobject (Object *o);
-void    luaI_gcFB       (Object *o);
-
-#endif

strlib.c

@@ -1,192 +0,0 @@
-/*
-** strlib.c
-** String library to LUA
-*/
-
-char *rcs_strlib="$Id: strlib.c,v 1.13 1995/10/09 12:49:21 roberto Exp roberto $";
-
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <ctype.h>
-
-#include "lua.h"
-#include "lualib.h"
-
-
-void lua_arg_error(char *funcname)
-{
-  char buff[100];
-  sprintf(buff, "incorrect arguments to function `%s'", funcname);
-  lua_error(buff);
-}
-
-char *lua_check_string (int numArg, char *funcname)
-{
-  lua_Object o = lua_getparam(numArg);
-  if (!(lua_isstring(o) || lua_isnumber(o)))
-    lua_arg_error(funcname);
-  return lua_getstring(o);
-}
-
-float lua_check_number (int numArg, char *funcname)
-{
-  lua_Object o = lua_getparam(numArg);
-  if (!lua_isnumber(o))
-    lua_arg_error(funcname);
-  return lua_getnumber(o);
-}
-
-static char *newstring (char *s)
-{
-  char *ns = (char *)malloc(strlen(s)+1);
-  if (ns == 0)
-    lua_error("not enough memory for new string");
-  strcpy(ns, s);
-  return ns;
-}
-
-
-/*
-** Return the position of the first caracter of a substring into a string
-** LUA interface:
-**			n = strfind (string, substring, init, end)
-*/
-static void str_find (void)
-{
- char *s1 = lua_check_string(1, "strfind");
- char *s2 = lua_check_string(2, "strfind");
- int init = (lua_getparam(3) == LUA_NOOBJECT) ? 0 :
-                                 (int)lua_check_number(3, "strfind")-1;
- char *f = strstr(s1+init,s2);
- if (f != NULL)
- {
-  int pos = f-s1+1;
-  if (lua_getparam (4) == LUA_NOOBJECT)
-   lua_pushnumber (pos);
-  else if ((int)lua_check_number(4, "strfind") >= pos+strlen(s2)-1)
-   lua_pushnumber (pos);
-  else
-   lua_pushnil();
- }
- else
-  lua_pushnil();
-}
-
-/*
-** Return the string length
-** LUA interface:
-**			n = strlen (string)
-*/
-static void str_len (void)
-{
- char *s = lua_check_string(1, "strlen");
- lua_pushnumber(strlen(s));
-}
-
-
-/*
-** Return the substring of a string, from start to end
-** LUA interface:
-**			substring = strsub (string, start, end)
-*/
-static void str_sub (void)
-{
- char *s = lua_check_string(1, "strsub");
- int start = (int)lua_check_number(2, "strsub");
- int end = (lua_getparam(3) == LUA_NOOBJECT) ? strlen(s) :
-                                    (int)lua_check_number(3, "strsub");
- if (end < start || start < 1 || end > strlen(s))
-  lua_pushliteral("");
- else
- {
-  char temp = s[end];
-  s[end] = 0;
-  lua_pushstring (&s[start-1]);
-  s[end] = temp;
- }
-}
-
-/*
-** Convert a string according to given function.
-*/
-typedef int (*strfunc)(int s);
-static void str_apply (strfunc f, char *funcname)
-{
- char *s, *c;
- c = s = newstring(lua_check_string(1, funcname));
- while (*c != 0)
- {
-  *c = f(*c);
-  c++;
- }
- lua_pushstring(s);
- free(s);
-}
-
-/*
-** Convert a string to lower case.
-** LUA interface:
-**			lowercase = strlower (string)
-*/
-static void str_lower (void)
-{
-  str_apply(tolower, "strlower");
-}
-
-
-/*
-** Convert a string to upper case.
-** LUA interface:
-**			uppercase = strupper (string)
-*/
-static void str_upper (void)
-{
-  str_apply(toupper, "strupper");
-}
-
-/*
-** get ascii value of a character in a string
-*/
-static void str_ascii (void)
-{
-  char *s = lua_check_string(1, "ascii");
-  lua_Object o2 = lua_getparam(2);
-  int pos;
-  pos = (o2 == LUA_NOOBJECT) ? 0 : (int)lua_check_number(2, "ascii")-1;
-  if (pos<0 || pos>=strlen(s))
-    lua_arg_error("ascii");
-  lua_pushnumber(s[pos]);
-}
-
-/*
-** converts one or more integers to chars in a string
-*/
-#define maxparams 50
-static void str_int2str (void)
-{
-  char s[maxparams+1];
-  int i = 0;
-  while (lua_getparam(++i) != LUA_NOOBJECT)
-  {
-    if (i > maxparams)
-      lua_error("too many parameters to function `int2str'");
-    s[i-1] = (int)lua_check_number(i, "int2str");
-  }
-  s[i-1] = 0;
-  lua_pushstring(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);
- lua_register ("ascii", str_ascii);
- lua_register ("int2str", str_int2str);
-}

strlib.h

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

table.c

@@ -1,282 +0,0 @@
-/*
-** table.c
-** Module to control static tables
-*/
-
-char *rcs_table="$Id: table.c,v 2.37 1995/10/26 14:21:56 roberto Exp roberto $";
-
-/*#include <string.h>*/
-
-#include "mem.h"
-#include "opcode.h"
-#include "tree.h"
-#include "hash.h"
-#include "table.h"
-#include "inout.h"
-#include "lua.h"
-#include "fallback.h"
-#include "luadebug.h"
-
-
-#define BUFFER_BLOCK 256
-
-Symbol *lua_table = NULL;
-static Word lua_ntable = 0;
-static Long lua_maxsymbol = 0;
-
-TaggedString **lua_constant = NULL;
-static Word lua_nconstant = 0;
-static Long lua_maxconstant = 0;
-
-
-#define GARBAGE_BLOCK 1024
-#define MIN_GARBAGE_BLOCK (GARBAGE_BLOCK/2)
-
-static void lua_nextvar (void);
-static void setglobal (void);
-static void getglobal (void);
-
-/*
-** Initialise symbol table with internal functions
-*/
-static void lua_initsymbol (void)
-{
- Word n;
- lua_maxsymbol = BUFFER_BLOCK;
- lua_table = newvector(lua_maxsymbol, Symbol);
- n = luaI_findsymbolbyname("next");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_next;
- n = luaI_findsymbolbyname("dofile");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_internaldofile;
- n = luaI_findsymbolbyname("setglobal");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = setglobal;
- n = luaI_findsymbolbyname("getglobal");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = getglobal;
- n = luaI_findsymbolbyname("nextvar");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_nextvar;
- n = luaI_findsymbolbyname("type"); 
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_type;
- n = luaI_findsymbolbyname("tonumber");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_obj2number;
- n = luaI_findsymbolbyname("print");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_print;
- n = luaI_findsymbolbyname("dostring");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_internaldostring;
- n = luaI_findsymbolbyname("setfallback");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_setfallback;
- n = luaI_findsymbolbyname("error");
- s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_error;
-}
-
-
-/*
-** Initialise constant table with pre-defined constants
-*/
-void lua_initconstant (void)
-{
- lua_maxconstant = BUFFER_BLOCK;
- lua_constant = newvector(lua_maxconstant, TaggedString *);
-}
-
-
-/*
-** Given a name, search it at symbol table and return its index. If not
-** found, allocate it.
-*/
-Word luaI_findsymbol (TreeNode *t)
-{
- if (lua_table == NULL)
-  lua_initsymbol(); 
- if (t->varindex == NOT_USED)
- {
-  if (lua_ntable == lua_maxsymbol)
-  {
-   if (lua_maxsymbol >= MAX_WORD)
-     lua_error("symbol table overflow");
-   lua_maxsymbol *= 2;
-   if (lua_maxsymbol >= MAX_WORD)
-     lua_maxsymbol = MAX_WORD; 
-   lua_table = growvector(lua_table, lua_maxsymbol, Symbol);
-  }
-  t->varindex = lua_ntable;
-  s_tag(lua_ntable) = LUA_T_NIL;
-  lua_ntable++;
- }
- return t->varindex;
-}
-
-
-Word luaI_findsymbolbyname (char *name)
-{
-  return luaI_findsymbol(lua_constcreate(name));
-}
-
-
-/*
-** Given a tree node, check it is has a correspondent constant index. If not,
-** allocate it.
-*/
-Word luaI_findconstant (TreeNode *t)
-{
- if (lua_constant == NULL)
-  lua_initconstant();
- if (t->constindex == NOT_USED)
- {
-  if (lua_nconstant == lua_maxconstant)
-  {
-   if (lua_maxconstant >= MAX_WORD)
-     lua_error("constant table overflow");
-   lua_maxconstant *= 2;
-   if (lua_maxconstant >= MAX_WORD)
-     lua_maxconstant = MAX_WORD;
-   lua_constant = growvector(lua_constant, lua_maxconstant, TaggedString *);
-  }
-  t->constindex = lua_nconstant;
-  lua_constant[lua_nconstant] = &(t->ts);
-  lua_nconstant++;
- }
- return t->constindex;
-}
-
-
-Word  luaI_findconstantbyname (char *name)
-{
-  return luaI_findconstant(lua_constcreate(name));
-}
-
-
-/*
-** Traverse symbol table objects
-*/
-static char *lua_travsymbol (int (*fn)(Object *))
-{
- Word i;
- for (i=0; i<lua_ntable; i++)
-  if (fn(&s_object(i)))
-    return luaI_nodebysymbol(i)->ts.str;
- return NULL;
-}
-
-
-/*
-** Mark an object if it is a string or a unmarked array.
-*/
-int lua_markobject (Object *o)
-{
- if (tag(o) == LUA_T_STRING && !tsvalue(o)->marked)
-   tsvalue(o)->marked = 1;
- else if (tag(o) == LUA_T_ARRAY)
-   lua_hashmark (avalue(o));
- else if ((o->tag == LUA_T_FUNCTION || o->tag == LUA_T_MARK)
-           && !o->value.tf->marked)
-   o->value.tf->marked = 1;
- return 0;
-}
-
-
-/*
-** Garbage collection. 
-** Delete all unused strings and arrays.
-*/
-void lua_pack (void)
-{
-  static Long block = GARBAGE_BLOCK; /* when garbage collector will be called */
-  static Long nentity = 0;  /* counter of new entities (strings and arrays) */
-  Long recovered = 0;
-  if (nentity++ < block) return;
-  lua_travstack(lua_markobject); /* mark stack objects */
-  lua_travsymbol(lua_markobject); /* mark symbol table objects */
-  luaI_travlock(lua_markobject); /* mark locked objects */
-  luaI_travfallbacks(lua_markobject);  /* mark fallbacks */
-  recovered += lua_strcollector();
-  recovered += lua_hashcollector();
-  recovered += luaI_funccollector();
-  nentity = 0;				/* reset counter */
-  block=(16*block-7*recovered)/12;	/* adapt block size */
-  if (block < MIN_GARBAGE_BLOCK) block = MIN_GARBAGE_BLOCK;
-} 
-
-
-/*
-** Internal function: return next global variable
-*/
-static void lua_nextvar (void)
-{
- Word next;
- lua_Object o = lua_getparam(1);
- if (o == LUA_NOOBJECT)
-   lua_error("too few arguments to function `nextvar'");
- if (lua_getparam(2) != LUA_NOOBJECT)
-   lua_error("too many arguments to function `nextvar'");
- if (lua_isnil(o))
-   next = 0;
- else if (!lua_isstring(o))
- {
-   lua_error("incorrect argument to function `nextvar'"); 
-   return;  /* to avoid warnings */
- }
- else
-   next = luaI_findsymbolbyname(lua_getstring(o)) + 1;
- while (next < lua_ntable && s_tag(next) == LUA_T_NIL) next++;
- if (next >= lua_ntable)
- {
-  lua_pushnil();
-  lua_pushnil();
- }
- else
- {
-  TreeNode *t = luaI_nodebysymbol(next);
-  Object name;
-  tag(&name) = LUA_T_STRING;
-  tsvalue(&name) = &(t->ts);
-  luaI_pushobject(&name);
-  luaI_pushobject(&s_object(next));
- }
-}
-
-
-static void setglobal (void)
-{
-  lua_Object name = lua_getparam(1);
-  lua_Object value = lua_getparam(2);
-  if (!lua_isstring(name))
-    lua_error("incorrect argument to function `setglobal'");
-  lua_pushobject(value);
-  lua_storeglobal(lua_getstring(name));
-}
-
-
-static void getglobal (void)
-{
-  lua_Object name = lua_getparam(1);
-  if (!lua_isstring(name))
-    lua_error("incorrect argument to function `getglobal'");
-  lua_pushobject(lua_getglobal(lua_getstring(name)));
-}
-
-
-static Object *functofind;
-static int checkfunc (Object *o)
-{
-  if (o->tag == LUA_T_FUNCTION)
-    return
-       ((functofind->tag == LUA_T_FUNCTION || functofind->tag == LUA_T_MARK)
-            && (functofind->value.tf == o->value.tf));
-  if (o->tag == LUA_T_CFUNCTION)
-    return
-       ((functofind->tag == LUA_T_CFUNCTION || functofind->tag == LUA_T_CMARK)
-            && (functofind->value.f == o->value.f));
-  return 0;
-}
-
-
-char *getobjname (lua_Object o, char **name)
-{ /* try to find a name for given function */
-  functofind = luaI_Address(o);
-  if ((*name = luaI_travfallbacks(checkfunc)) != NULL)
-    return "fallback";
-  else if ((*name = lua_travsymbol(checkfunc)) != NULL)
-    return "global";
-  else return "";
-}
-

table.h

@@ -1,29 +0,0 @@
-/*
-** Module to control static tables
-** TeCGraf - PUC-Rio
-** $Id: table.h,v 2.12 1995/10/17 11:58:41 roberto Exp roberto $
-*/
-
-#ifndef table_h
-#define table_h
-
-#include "tree.h"
-#include "opcode.h"
-
-extern Symbol *lua_table;
-extern TaggedString **lua_constant;
-
-extern char   *lua_file[];
-extern int     lua_nfile;
-
-
-void  lua_initconstant (void);
-Word  luaI_findsymbolbyname (char *name);
-Word  luaI_findsymbol      (TreeNode *t);
-Word  luaI_findconstant    (TreeNode *t);
-Word  luaI_findconstantbyname (char *name);
-int   lua_markobject      (Object *o);
-void  lua_pack            (void);
-
-
-#endif

tree.c

@@ -1,123 +0,0 @@
-/*
-** tree.c
-** TecCGraf - PUC-Rio
-*/
- 
-char *rcs_tree="$Id: tree.c,v 1.13 1995/01/12 14:19:04 roberto Exp roberto $";
-
-
-#include <string.h>
-
-#include "mem.h"
-#include "lua.h"
-#include "tree.h"
-#include "table.h"
-
-
-#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b))) 
-
-
-typedef struct StringNode {
-  struct StringNode *next;
-  TaggedString ts;
-} StringNode;
-
-static StringNode *string_root = NULL;
-
-static TreeNode *constant_root = NULL;
-
-/*
-** Insert a new constant/variable at the tree. 
-*/
-static TreeNode *tree_create (TreeNode **node, char *str)
-{
- if (*node == NULL)
- {
-  *node = (TreeNode *) luaI_malloc(sizeof(TreeNode)+strlen(str));
-  (*node)->left = (*node)->right = NULL;
-  strcpy((*node)->ts.str, str);
-  (*node)->ts.marked = 0;
-  (*node)->ts.hash = 0;
-  (*node)->varindex = (*node)->constindex = NOT_USED;
-  return *node;
- }
- else
- {
-  int c = lua_strcmp(str, (*node)->ts.str);
-  if (c < 0) 
-   return tree_create(&(*node)->left, str);
-  else if (c > 0)
-   return tree_create(&(*node)->right, str);
-  else
-   return *node;
- }
-}
-
-TaggedString *lua_createstring (char *str) 
-{
-  StringNode *newString;
-  if (str == NULL) return NULL;
-  lua_pack();
-  newString = (StringNode *)luaI_malloc(sizeof(StringNode)+strlen(str));
-  newString->ts.marked = 0;
-  newString->ts.hash = 0;
-  strcpy(newString->ts.str, str);
-  newString->next = string_root;
-  string_root = newString;
-  return &(newString->ts);
-}
-
-
-TreeNode *lua_constcreate (char *str) 
-{
- return tree_create(&constant_root, str);
-}
-
-
-/*
-** Garbage collection function.
-** This function traverse the string list freeing unindexed strings
-*/
-Long lua_strcollector (void)
-{
-  StringNode *curr = string_root, *prev = NULL;
-  Long counter = 0;
-  while (curr)
-  {
-    StringNode *next = curr->next;
-    if (!curr->ts.marked)
-    {
-      if (prev == NULL) string_root = next;
-      else prev->next = next;
-      luaI_free(curr);
-      ++counter;
-    }
-    else
-    {
-      curr->ts.marked = 0;
-      prev = curr;
-    }
-    curr = next;
-  }
-  return counter;
-}
-
-
-/*
-** Traverse the constant tree looking for a specific symbol number
-*/
-static TreeNode *nodebysymbol (TreeNode *root, Word symbol)
-{
-  TreeNode *t;
-  if (root == NULL) return NULL;
-  if (root->varindex == symbol) return root;
-  t = nodebysymbol(root->left, symbol);
-  if (t) return t;
-  return nodebysymbol(root->right, symbol);
-}
-
-TreeNode *luaI_nodebysymbol (Word symbol)
-{
-  return nodebysymbol(constant_root, symbol); 
-}
-

tree.h

@@ -1,37 +0,0 @@
-/*
-** tree.h
-** TecCGraf - PUC-Rio
-** $Id: tree.h,v 1.9 1995/01/12 14:19:04 roberto Exp roberto $
-*/
-
-#ifndef tree_h
-#define tree_h
-
-#include "types.h"
-
-#define NOT_USED  0xFFFE
-
-
-typedef struct TaggedString
-{
-  unsigned long hash;  /* 0 if not initialized */
-  char marked;   /* for garbage collection */
-  char str[1];   /* \0 byte already reserved */
-} TaggedString;
- 
-typedef struct TreeNode
-{
- struct TreeNode *right;
- struct TreeNode *left;
- unsigned short varindex;  /* != NOT_USED  if this is a symbol */
- unsigned short constindex;  /* != NOT_USED  if this is a constant */
- TaggedString ts;
-} TreeNode;
-
-
-TaggedString *lua_createstring (char *str);
-TreeNode *lua_constcreate  (char *str);
-Long lua_strcollector (void);
-TreeNode *luaI_nodebysymbol (Word symbol);
-
-#endif

types.h

@@ -1,31 +0,0 @@
-/*
-** TeCGraf - PUC-Rio
-** $Id: types.h,v 1.2 1994/12/27 20:41:47 celes Exp roberto $
-*/
-
-#ifndef types_h
-#define types_h
-
-#include <limits.h>
-
-#ifndef real
-#define real float
-#endif
-
-typedef int Bool;  /* boolean values */
-
-#define Byte lua_Byte	/* some systems have Byte as a predefined type */
-typedef unsigned char  Byte;  /* unsigned 8 bits */
-
-#define Word lua_Word	/* some systems have Word as a predefined type */
-typedef unsigned short Word;  /* unsigned 16 bits */
-
-#define MAX_WORD  (USHRT_MAX-2)  /* maximum value of a word (-2 for safety) */
-#define MAX_INT   (INT_MAX-2)  /* maximum value of a int (-2 for safety) */
-
-#define Long lua_Long	/* some systems have Long as a predefined type */
-typedef signed long  Long;  /* 32 bits */
-
-typedef unsigned int IntPoint; /* unsigned with same size as a pointer (for hashing) */
-
-#endif

ugly.h

@@ -1,36 +0,0 @@
-/*
-** ugly.h
-** TecCGraf - PUC-Rio
-** $Id: $
-*/
-
-#ifndef ugly_h
-#define ugly_h
-
-/* This enum must have the same order of the array 'reserved' in lex.c */
-
-enum {
- U_and=128,
- U_do,
- U_else,
- U_elseif,
- U_end,
- U_function,
- U_if,
- U_local,
- U_nil,
- U_not,
- U_or,
- U_repeat,
- U_return,
- U_then,
- U_until,
- U_while,
- U_eq = '='+128,
- U_le = '<'+128,
- U_ge = '>'+128,
- U_ne = '~'+128,
- U_sc = '.'+128
-};
-
-#endif