This is Lua 1.0. It was never publicly released. This code is a snapshot of

the status of Lua on 28 Jul 1993. It is distributed for historical curiosity to celebrate 10 years of Lua and is hereby placed in the public domain. There is no documentation, except the test programs. The manual for Lua 1.1 probably works for this version as well. The source files for the lexer and parser have been lost: all that is left is the output of lex and yacc. A grammar can be found inside y_tab.c in yyreds. The code compiles and runs in RedHat 5.2 with gcc 2.7.2.3. It may not run in newer systems, because it assumes that stdin and stdout are constants, though ANSI C does not promise they are. If make fails, try using the fixed modules provided in the "fixed" directory. To see the differences (which are really quite minor), do "make diff". To see Lua 1.0 in action, do "make test". (The last test raises an error on purpose.) Enjoy! -- The Lua team, lua@tecgraf.puc-rio.br
2026-07-29 09:29:07 +00:00 · 2003-10-09 23:44:30 -03:00
39 changed files with 4736 additions and 2369 deletions
--- a/29
+++ b/29
@@ -0,0 +1,29 @@
+OBJS= hash.o inout.o lex_yy.o opcode.o table.o y_tab.o lua.o iolib.o mathlib.o strlib.o
+
+CFLAGS= -O2 -I.
+
+T= lua
+
+all:	$T
+
+$T:	$(OBJS)
+	$(CC) -o $@ $(OBJS) -lm
+
+A=--------------------------------------------------------------------------
+test:	$T
+	@echo "$A"
+	./$T sort.lua main
+	@echo "$A"
+	./$T globals.lua | sort | column
+	@echo "$A"
+	./$T array.lua
+	@echo "$A"
+	./$T save.lua
+	@echo "$A"
+	./$T test.lua retorno_multiplo norma
+
+clean:
+	rm -f $T $(OBJS) core core.*
+
+diff:
+	diff . fixed | grep -v ^Only
--- a/22
+++ b/22
@@ -0,0 +1,22 @@
+This is Lua 1.0. It was never publicly released. This code is a snapshot of
+the status of Lua on 28 Jul 1993. It is distributed for historical curiosity
+to celebrate 10 years of Lua and is hereby placed in the public domain.
+
+There is no documentation, except the test programs. The manual for Lua 1.1
+probably works for this version as well.
+
+The source files for the lexer and parser have been lost: all that is left is
+the output of lex and yacc. A grammar can be found inside y_tab.c in yyreds.
+
+The code compiles and runs in RedHat 5.2 with gcc 2.7.2.3. It may not run in
+newer systems, because it assumes that stdin and stdout are constants, though
+ANSI C does not promise they are. If make fails, try using the fixed modules
+provided in the "fixed" directory. To see the differences (which are really
+quite minor), do "make diff".
+
+To see Lua 1.0 in action, do "make test". (The last test raises an error on
+purpose.)
+
+Enjoy!
+
+-- The Lua team, lua@tecgraf.puc-rio.br
--- a/array.lua
+++ b/array.lua
@@ -0,0 +1,15 @@
+$debug
+
+a = @()
+
+i=0
+while i<10 do
+ a[i] = i*i
+ i=i+1
+end
+
+r,v = next(a,nil)
+while r ~= nil do
+ print ("array["..r.."] = "..v)
+ r,v = next(a,r)
+end 
--- a/3
+++ b/3
@@ -1,3 +0,0 @@
-1d
-x
-
--- a/fixed/iolib.c
+++ b/fixed/iolib.c
@@ -0,0 +1,402 @@
+/*
+** iolib.c
+** Input/output library to LUA
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 19 May 93
+*/
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#ifdef __GNUC__
+#include <floatingpoint.h>
+#endif
+
+#include "lua.h"
+
+static FILE *in=NULL, *out=NULL;
+
+/*
+** Open a file to read.
+** LUA interface:
+**			status = readfrom (filename)
+** where:
+**			status = 1 -> success
+**			status = 0 -> error
+*/
+static void io_readfrom (void)
+{
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)			/* restore standart input */
+ {
+  if (in != stdin)
+  {
+   fclose (in);
+   in = stdin;
+  }
+  lua_pushnumber (1);
+ }
+ else
+ {
+  if (!lua_isstring (o))
+  {
+   lua_error ("incorrect argument to function 'readfrom`");
+   lua_pushnumber (0);
+  }
+  else
+  {
+   FILE *fp = fopen (lua_getstring(o),"r");
+   if (fp == NULL)
+   {
+    lua_pushnumber (0);
+   }
+   else
+   {
+    if (in != stdin) fclose (in);
+    in = fp;
+    lua_pushnumber (1);
+   }
+  }
+ }
+}
+
+
+/*
+** Open a file to write.
+** LUA interface:
+**			status = writeto (filename)
+** where:
+**			status = 1 -> success
+**			status = 0 -> error
+*/
+static void io_writeto (void)
+{
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)			/* restore standart output */
+ {
+  if (out != stdout)
+  {
+   fclose (out);
+   out = stdout;
+  }
+  lua_pushnumber (1);
+ }
+ else
+ {
+  if (!lua_isstring (o))
+  {
+   lua_error ("incorrect argument to function 'writeto`");
+   lua_pushnumber (0);
+  }
+  else
+  {
+   FILE *fp = fopen (lua_getstring(o),"w");
+   if (fp == NULL)
+   {
+    lua_pushnumber (0);
+   }
+   else
+   {
+    if (out != stdout) fclose (out);
+    out = fp;
+    lua_pushnumber (1);
+   }
+  }
+ }
+}
+
+
+/*
+** Read a variable. On error put nil on stack.
+** LUA interface:
+**			variable = read ([format])
+**
+** O formato pode ter um dos seguintes especificadores:
+**
+**	s ou S -> para string
+**	f ou F, g ou G, e ou E -> para reais
+**	i ou I -> para inteiros
+**
+**	Estes especificadores podem vir seguidos de numero que representa
+**	o numero de campos a serem lidos.
+*/
+static void io_read (void)
+{
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)			/* free format */
+ {
+  int c;
+  char s[256];
+  while (isspace(c=fgetc(in)))
+   ;
+  if (c == '\"')
+  {
+   if (fscanf (in, "%[^\"]\"", s) != 1)
+   {
+    lua_pushnil ();
+    return;
+   }
+  }
+  else if (c == '\'')
+  {
+   if (fscanf (in, "%[^\']\'", s) != 1)
+   {
+    lua_pushnil ();
+    return;
+   }
+  }
+  else
+  {
+   char *ptr;
+   double d;
+   ungetc (c, in);
+   if (fscanf (in, "%s", s) != 1)
+   {
+    lua_pushnil ();
+    return;
+   }
+   d = strtod (s, &ptr);
+   if (!(*ptr))
+   {
+    lua_pushnumber (d);
+    return;
+   }
+  }
+  lua_pushstring (s);
+  return;
+ }
+ else				/* formatted */
+ {
+  char *e = lua_getstring(o);
+  char t;
+  int  m=0;
+  while (isspace(*e)) e++;
+  t = *e++;
+  while (isdigit(*e))
+   m = m*10 + (*e++ - '0');
+  
+  if (m > 0)
+  {
+   char f[80];
+   char s[256];
+   sprintf (f, "%%%ds", m);
+   fscanf (in, f, s);
+   switch (tolower(t))
+   {
+    case 'i':
+    {
+     long int l;
+     sscanf (s, "%ld", &l);
+     lua_pushnumber(l);
+    }
+    break;
+    case 'f': case 'g': case 'e':
+    {
+     float f;
+     sscanf (s, "%f", &f);
+     lua_pushnumber(f);
+    }
+    break;
+    default: 
+     lua_pushstring(s); 
+    break;
+   }
+  }
+  else
+  {
+   switch (tolower(t))
+   {
+    case 'i':
+    {
+     long int l;
+     fscanf (in, "%ld", &l);
+     lua_pushnumber(l);
+    }
+    break;
+    case 'f': case 'g': case 'e':
+    {
+     float f;
+     fscanf (in, "%f", &f);
+     lua_pushnumber(f);
+    }
+    break;
+    default: 
+    {
+     char s[256];
+     fscanf (in, "%s", s);
+     lua_pushstring(s);
+    }
+    break;
+   }
+  }
+ }
+}
+
+
+/*
+** Write a variable. On error put 0 on stack, otherwise put 1.
+** LUA interface:
+**			status = write (variable [,format])
+**
+** O formato pode ter um dos seguintes especificadores:
+**
+**	s ou S -> para string
+**	f ou F, g ou G, e ou E -> para reais
+**	i ou I -> para inteiros
+**
+**	Estes especificadores podem vir seguidos de:
+**
+**		[?][m][.n]
+**
+**	onde:
+**		? -> indica justificacao
+**			< = esquerda
+**			| = centro
+**			> = direita (default)
+**		m -> numero maximo de campos (se exceder estoura)
+**		n -> indica precisao para
+**			reais -> numero de casas decimais
+**			inteiros -> numero minimo de digitos
+**			string -> nao se aplica
+*/
+static char *buildformat (char *e, lua_Object o)
+{
+ static char buffer[512];
+ static char f[80];
+ char *string = &buffer[255];
+ char t, j='r';
+ int  m=0, n=0, l;
+ while (isspace(*e)) e++;
+ t = *e++;
+ if (*e == '<' || *e == '|' || *e == '>') j = *e++;
+ while (isdigit(*e))
+  m = m*10 + (*e++ - '0');
+ e++;	/* skip point */
+ while (isdigit(*e))
+  n = n*10 + (*e++ - '0');
+
+ sprintf(f,"%%");
+ if (j == '<' || j == '|') sprintf(strchr(f,0),"-");
+ if (m != 0)   sprintf(strchr(f,0),"%d", m);
+ if (n != 0)   sprintf(strchr(f,0),".%d", n);
+ sprintf(strchr(f,0), "%c", t);
+ switch (tolower(t))
+ {
+  case 'i': t = 'i';
+   sprintf (string, f, (long int)lua_getnumber(o));
+  break;
+  case 'f': case 'g': case 'e': t = 'f';
+   sprintf (string, f, (float)lua_getnumber(o));
+  break;
+  case 's': t = 's';
+   sprintf (string, f, lua_getstring(o));
+  break;
+  default: return "";
+ }
+ l = strlen(string);
+ if (m!=0 && l>m)
+ {
+  int i;
+  for (i=0; i<m; i++)
+   string[i] = '*';
+  string[i] = 0;
+ }
+ else if (m!=0 && j=='|')
+ {
+  int i=l-1;
+  while (isspace(string[i])) i--;
+  string -= (m-i) / 2;
+  i=0;
+  while (string[i]==0) string[i++] = ' ';
+  string[l] = 0;
+ }
+ return string;
+}
+static void io_write (void)
+{
+ lua_Object o1 = lua_getparam (1);
+ lua_Object o2 = lua_getparam (2);
+ if (o1 == NULL)			/* new line */
+ {
+  fprintf (out, "\n");
+  lua_pushnumber(1);
+ }
+ else if (o2 == NULL)   		/* free format */
+ {
+  int status=0;
+  if (lua_isnumber(o1))
+   status = fprintf (out, "%g", lua_getnumber(o1));
+  else if (lua_isstring(o1))
+   status = fprintf (out, "%s", lua_getstring(o1));
+  lua_pushnumber(status);
+ }
+ else					/* formated */
+ {
+  if (!lua_isstring(o2))
+  { 
+   lua_error ("incorrect format to function `write'"); 
+   lua_pushnumber(0);
+   return;
+  }
+  lua_pushnumber(fprintf (out, "%s", buildformat(lua_getstring(o2),o1)));
+ }
+}
+
+/*
+** Execute a executable program using "sustem".
+** On error put 0 on stack, otherwise put 1.
+*/
+void io_execute (void)
+{
+ lua_Object o = lua_getparam (1);
+ if (o == NULL || !lua_isstring (o))
+ {
+  lua_error ("incorrect argument to function 'execute`");
+  lua_pushnumber (0);
+ }
+ else
+ {
+  system(lua_getstring(o));
+  lua_pushnumber (1);
+ }
+ return;
+}
+
+/*
+** Remove a file.
+** On error put 0 on stack, otherwise put 1.
+*/
+void io_remove  (void)
+{
+ lua_Object o = lua_getparam (1);
+ if (o == NULL || !lua_isstring (o))
+ {
+  lua_error ("incorrect argument to function 'execute`");
+  lua_pushnumber (0);
+ }
+ else
+ {
+  if (remove(lua_getstring(o)) == 0)
+   lua_pushnumber (1);
+  else
+   lua_pushnumber (0);
+ }
+ return;
+}
+
+/*
+** Open io library
+*/
+void iolib_open (void)
+{
+ in=stdin; out=stdout;
+ lua_register ("readfrom", io_readfrom);
+ lua_register ("writeto",  io_writeto);
+ lua_register ("read",     io_read);
+ lua_register ("write",    io_write);
+ lua_register ("execute",  io_execute);
+ lua_register ("remove",   io_remove);
+}
--- a/fixed/lex_yy.c
+++ b/fixed/lex_yy.c
@@ -0,0 +1,923 @@
+# include "stdio.h"
+# define U(x) x
+# define NLSTATE yyprevious=YYNEWLINE
+# define BEGIN yybgin = yysvec + 1 +
+# define INITIAL 0
+# define YYLERR yysvec
+# define YYSTATE (yyestate-yysvec-1)
+# define YYOPTIM 1
+# define YYLMAX BUFSIZ
+# define output(c) putc(c,yyout)
+# define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==10?(yylineno++,yytchar):yytchar)==EOF?0:yytchar)
+# define unput(c) {yytchar= (c);if(yytchar=='\n')yylineno--;*yysptr++=yytchar;}
+# define yymore() (yymorfg=1)
+# define ECHO fprintf(yyout, "%s",yytext)
+# define REJECT { nstr = yyreject(); goto yyfussy;}
+int yyleng; extern char yytext[];
+int yymorfg;
+extern char *yysptr, yysbuf[];
+int yytchar;
+FILE *yyin = {NULL}, *yyout = {NULL};
+extern int yylineno;
+struct yysvf { 
+	struct yywork *yystoff;
+	struct yysvf *yyother;
+	int *yystops;};
+struct yysvf *yyestate;
+extern struct yysvf yysvec[], *yybgin;
+#include <stdlib.h>
+#include <string.h>
+
+#include "opcode.h"
+#include "hash.h"
+#include "inout.h"
+#include "table.h"
+#include "y_tab.h"
+
+#undef input
+#undef unput
+
+static Input input;
+static Unput unput;
+
+void lua_setinput (Input fn)
+{
+ input = fn;
+}
+
+void lua_setunput (Unput fn)
+{
+ unput = fn;
+}
+
+char *lua_lasttext (void)
+{
+ return yytext;
+}
+
+# define YYNEWLINE 10
+yylex(){
+int nstr; extern int yyprevious;
+while((nstr = yylook()) >= 0)
+yyfussy: switch(nstr){
+case 0:
+if(yywrap()) return(0); break;
+case 1:
+				;
+break;
+case 2:
+			{yylval.vInt = 1; return DEBUG;}
+break;
+case 3:
+			{yylval.vInt = 0; return DEBUG;}
+break;
+case 4:
+				lua_linenumber++;
+break;
+case 5:
+				;
+break;
+case 6:
+				return LOCAL;
+break;
+case 7:
+				return IF;
+break;
+case 8:
+				return THEN;
+break;
+case 9:
+				return ELSE;
+break;
+case 10:
+			return ELSEIF;
+break;
+case 11:
+				return WHILE;
+break;
+case 12:
+				return DO;
+break;
+case 13:
+			return REPEAT;
+break;
+case 14:
+				return UNTIL;
+break;
+case 15:
+			{
+                                         yylval.vWord = lua_nfile-1;
+                                         return FUNCTION;
+					}
+break;
+case 16:
+				return END;
+break;
+case 17:
+				return RETURN;
+break;
+case 18:
+				return LOCAL;
+break;
+case 19:
+				return NIL;
+break;
+case 20:
+				return AND;
+break;
+case 21:
+				return OR;
+break;
+case 22:
+				return NOT;
+break;
+case 23:
+				return NE;
+break;
+case 24:
+				return LE;
+break;
+case 25:
+				return GE;
+break;
+case 26:
+				return CONC;
+break;
+case 27:
+			case 28:
+		      {
+				       yylval.vWord = lua_findenclosedconstant (yytext);
+				       return STRING;
+				      }
+break;
+case 29:
+case 30:
+case 31:
+case 32:
+{
+				        yylval.vFloat = atof(yytext);
+				        return NUMBER;
+				       }
+break;
+case 33:
+ 	       {
+					yylval.vWord = lua_findsymbol (yytext);
+					return NAME;
+				       }
+break;
+case 34:
+				return  *yytext;
+break;
+case -1:
+break;
+default:
+fprintf(yyout,"bad switch yylook %d",nstr);
+} return(0); }
+/* end of yylex */
+int yyvstop[] = {
+0,
+
+1,
+0,
+
+1,
+0,
+
+34,
+0,
+
+1,
+34,
+0,
+
+4,
+0,
+
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+29,
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+1,
+0,
+
+27,
+0,
+
+28,
+0,
+
+5,
+0,
+
+26,
+0,
+
+30,
+0,
+
+29,
+0,
+
+29,
+0,
+
+24,
+0,
+
+25,
+0,
+
+33,
+0,
+
+33,
+0,
+
+12,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+7,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+21,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+23,
+0,
+
+29,
+30,
+0,
+
+31,
+0,
+
+20,
+33,
+0,
+
+33,
+0,
+
+16,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+19,
+33,
+0,
+
+22,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+32,
+0,
+
+9,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+8,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+31,
+32,
+0,
+
+33,
+0,
+
+33,
+0,
+
+6,
+18,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+14,
+33,
+0,
+
+11,
+33,
+0,
+
+10,
+33,
+0,
+
+33,
+0,
+
+13,
+33,
+0,
+
+17,
+33,
+0,
+
+2,
+0,
+
+33,
+0,
+
+15,
+33,
+0,
+
+3,
+0,
+0};
+# define YYTYPE char
+struct yywork { YYTYPE verify, advance; } yycrank[] = {
+0,0,	0,0,	1,3,	0,0,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	1,4,	1,5,	
+6,29,	4,28,	0,0,	0,0,	
+0,0,	0,0,	7,31,	0,0,	
+6,29,	6,29,	0,0,	0,0,	
+0,0,	0,0,	7,31,	7,31,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	0,0,	1,6,	
+4,28,	0,0,	0,0,	0,0,	
+1,7,	0,0,	0,0,	0,0,	
+1,3,	6,30,	1,8,	1,9,	
+0,0,	1,10,	6,29,	7,31,	
+8,33,	0,0,	6,29,	0,0,	
+7,32,	0,0,	0,0,	6,29,	
+7,31,	1,11,	0,0,	1,12,	
+2,27,	7,31,	1,13,	11,39,	
+12,40,	1,13,	26,56,	0,0,	
+0,0,	2,8,	2,9,	0,0,	
+6,29,	0,0,	0,0,	6,29,	
+0,0,	0,0,	7,31,	0,0,	
+0,0,	7,31,	0,0,	0,0,	
+2,11,	0,0,	2,12,	0,0,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	1,14,	0,0,	
+0,0,	1,15,	1,16,	1,17,	
+0,0,	22,52,	1,18,	18,47,	
+23,53,	1,19,	42,63,	1,20,	
+1,21,	25,55,	14,42,	1,22,	
+15,43,	1,23,	1,24,	16,44,	
+1,25,	16,45,	17,46,	19,48,	
+21,51,	2,14,	20,49,	1,26,	
+2,15,	2,16,	2,17,	24,54,	
+20,50,	2,18,	44,64,	45,65,	
+2,19,	46,66,	2,20,	2,21,	
+27,57,	48,67,	2,22,	49,68,	
+2,23,	2,24,	50,69,	2,25,	
+52,70,	53,72,	27,58,	54,73,	
+52,71,	9,34,	2,26,	9,35,	
+9,35,	9,35,	9,35,	9,35,	
+9,35,	9,35,	9,35,	9,35,	
+9,35,	10,36,	55,74,	10,37,	
+10,37,	10,37,	10,37,	10,37,	
+10,37,	10,37,	10,37,	10,37,	
+10,37,	57,75,	58,76,	64,80,	
+66,81,	67,82,	70,83,	71,84,	
+72,85,	73,86,	74,87,	10,38,	
+10,38,	38,61,	10,38,	38,61,	
+75,88,	76,89,	38,62,	38,62,	
+38,62,	38,62,	38,62,	38,62,	
+38,62,	38,62,	38,62,	38,62,	
+80,92,	81,93,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+82,94,	83,95,	84,96,	10,38,	
+10,38,	86,97,	10,38,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	87,98,	88,99,	60,79,	
+60,79,	13,41,	60,79,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	33,33,	89,100,	60,79,	
+60,79,	92,101,	60,79,	93,102,	
+95,103,	33,33,	33,0,	96,104,	
+99,105,	100,106,	102,107,	106,108,	
+107,109,	35,35,	35,35,	35,35,	
+35,35,	35,35,	35,35,	35,35,	
+35,35,	35,35,	35,35,	108,110,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	33,33,	0,0,	
+0,0,	35,59,	35,59,	33,33,	
+35,59,	0,0,	0,0,	33,33,	
+0,0,	0,0,	0,0,	0,0,	
+33,33,	0,0,	0,0,	0,0,	
+0,0,	36,60,	36,60,	36,60,	
+36,60,	36,60,	36,60,	36,60,	
+36,60,	36,60,	36,60,	0,0,	
+0,0,	33,33,	0,0,	0,0,	
+33,33,	35,59,	35,59,	0,0,	
+35,59,	36,38,	36,38,	59,77,	
+36,38,	59,77,	0,0,	0,0,	
+59,78,	59,78,	59,78,	59,78,	
+59,78,	59,78,	59,78,	59,78,	
+59,78,	59,78,	61,62,	61,62,	
+61,62,	61,62,	61,62,	61,62,	
+61,62,	61,62,	61,62,	61,62,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	36,38,	36,38,	0,0,	
+36,38,	77,78,	77,78,	77,78,	
+77,78,	77,78,	77,78,	77,78,	
+77,78,	77,78,	77,78,	79,90,	
+0,0,	79,90,	0,0,	0,0,	
+79,91,	79,91,	79,91,	79,91,	
+79,91,	79,91,	79,91,	79,91,	
+79,91,	79,91,	90,91,	90,91,	
+90,91,	90,91,	90,91,	90,91,	
+90,91,	90,91,	90,91,	90,91,	
+0,0};
+struct yysvf yysvec[] = {
+0,	0,	0,
+yycrank+-1,	0,		yyvstop+1,
+yycrank+-28,	yysvec+1,	yyvstop+3,
+yycrank+0,	0,		yyvstop+5,
+yycrank+4,	0,		yyvstop+7,
+yycrank+0,	0,		yyvstop+10,
+yycrank+-11,	0,		yyvstop+12,
+yycrank+-17,	0,		yyvstop+14,
+yycrank+7,	0,		yyvstop+16,
+yycrank+107,	0,		yyvstop+18,
+yycrank+119,	0,		yyvstop+20,
+yycrank+6,	0,		yyvstop+23,
+yycrank+7,	0,		yyvstop+25,
+yycrank+158,	0,		yyvstop+27,
+yycrank+4,	yysvec+13,	yyvstop+30,
+yycrank+5,	yysvec+13,	yyvstop+33,
+yycrank+11,	yysvec+13,	yyvstop+36,
+yycrank+5,	yysvec+13,	yyvstop+39,
+yycrank+5,	yysvec+13,	yyvstop+42,
+yycrank+12,	yysvec+13,	yyvstop+45,
+yycrank+21,	yysvec+13,	yyvstop+48,
+yycrank+10,	yysvec+13,	yyvstop+51,
+yycrank+4,	yysvec+13,	yyvstop+54,
+yycrank+4,	yysvec+13,	yyvstop+57,
+yycrank+21,	yysvec+13,	yyvstop+60,
+yycrank+9,	yysvec+13,	yyvstop+63,
+yycrank+9,	0,		yyvstop+66,
+yycrank+40,	0,		yyvstop+68,
+yycrank+0,	yysvec+4,	yyvstop+70,
+yycrank+0,	yysvec+6,	0,	
+yycrank+0,	0,		yyvstop+72,
+yycrank+0,	yysvec+7,	0,	
+yycrank+0,	0,		yyvstop+74,
+yycrank+-280,	0,		yyvstop+76,
+yycrank+0,	0,		yyvstop+78,
+yycrank+249,	0,		yyvstop+80,
+yycrank+285,	0,		yyvstop+82,
+yycrank+0,	yysvec+10,	yyvstop+84,
+yycrank+146,	0,		0,	
+yycrank+0,	0,		yyvstop+86,
+yycrank+0,	0,		yyvstop+88,
+yycrank+0,	yysvec+13,	yyvstop+90,
+yycrank+10,	yysvec+13,	yyvstop+92,
+yycrank+0,	yysvec+13,	yyvstop+94,
+yycrank+19,	yysvec+13,	yyvstop+97,
+yycrank+35,	yysvec+13,	yyvstop+99,
+yycrank+27,	yysvec+13,	yyvstop+101,
+yycrank+0,	yysvec+13,	yyvstop+103,
+yycrank+42,	yysvec+13,	yyvstop+106,
+yycrank+35,	yysvec+13,	yyvstop+108,
+yycrank+30,	yysvec+13,	yyvstop+110,
+yycrank+0,	yysvec+13,	yyvstop+112,
+yycrank+36,	yysvec+13,	yyvstop+115,
+yycrank+48,	yysvec+13,	yyvstop+117,
+yycrank+35,	yysvec+13,	yyvstop+119,
+yycrank+61,	yysvec+13,	yyvstop+121,
+yycrank+0,	0,		yyvstop+123,
+yycrank+76,	0,		0,	
+yycrank+67,	0,		0,	
+yycrank+312,	0,		0,	
+yycrank+183,	yysvec+36,	yyvstop+125,
+yycrank+322,	0,		0,	
+yycrank+0,	yysvec+61,	yyvstop+128,
+yycrank+0,	yysvec+13,	yyvstop+130,
+yycrank+78,	yysvec+13,	yyvstop+133,
+yycrank+0,	yysvec+13,	yyvstop+135,
+yycrank+81,	yysvec+13,	yyvstop+138,
+yycrank+84,	yysvec+13,	yyvstop+140,
+yycrank+0,	yysvec+13,	yyvstop+142,
+yycrank+0,	yysvec+13,	yyvstop+145,
+yycrank+81,	yysvec+13,	yyvstop+148,
+yycrank+66,	yysvec+13,	yyvstop+150,
+yycrank+74,	yysvec+13,	yyvstop+152,
+yycrank+80,	yysvec+13,	yyvstop+154,
+yycrank+78,	yysvec+13,	yyvstop+156,
+yycrank+94,	0,		0,	
+yycrank+93,	0,		0,	
+yycrank+341,	0,		0,	
+yycrank+0,	yysvec+77,	yyvstop+158,
+yycrank+356,	0,		0,	
+yycrank+99,	yysvec+13,	yyvstop+160,
+yycrank+89,	yysvec+13,	yyvstop+163,
+yycrank+108,	yysvec+13,	yyvstop+165,
+yycrank+120,	yysvec+13,	yyvstop+167,
+yycrank+104,	yysvec+13,	yyvstop+169,
+yycrank+0,	yysvec+13,	yyvstop+171,
+yycrank+113,	yysvec+13,	yyvstop+174,
+yycrank+148,	yysvec+13,	yyvstop+176,
+yycrank+133,	0,		0,	
+yycrank+181,	0,		0,	
+yycrank+366,	0,		0,	
+yycrank+0,	yysvec+90,	yyvstop+178,
+yycrank+183,	yysvec+13,	yyvstop+181,
+yycrank+182,	yysvec+13,	yyvstop+183,
+yycrank+0,	yysvec+13,	yyvstop+185,
+yycrank+172,	yysvec+13,	yyvstop+189,
+yycrank+181,	yysvec+13,	yyvstop+191,
+yycrank+0,	yysvec+13,	yyvstop+193,
+yycrank+0,	yysvec+13,	yyvstop+196,
+yycrank+189,	0,		0,	
+yycrank+195,	0,		0,	
+yycrank+0,	yysvec+13,	yyvstop+199,
+yycrank+183,	yysvec+13,	yyvstop+202,
+yycrank+0,	yysvec+13,	yyvstop+204,
+yycrank+0,	yysvec+13,	yyvstop+207,
+yycrank+0,	0,		yyvstop+210,
+yycrank+178,	0,		0,	
+yycrank+186,	yysvec+13,	yyvstop+212,
+yycrank+204,	0,		0,	
+yycrank+0,	yysvec+13,	yyvstop+214,
+yycrank+0,	0,		yyvstop+217,
+0,	0,	0};
+struct yywork *yytop = yycrank+423;
+struct yysvf *yybgin = yysvec+1;
+char yymatch[] = {
+00  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,011 ,012 ,01  ,01  ,01  ,01  ,01  ,
+01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+011 ,01  ,'"' ,01  ,01  ,01  ,01  ,047 ,
+01  ,01  ,01  ,'+' ,01  ,'+' ,01  ,01  ,
+'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,
+'0' ,'0' ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,'A' ,
+01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,01  ,
+0};
+char yyextra[] = {
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0};
+#ifndef lint
+static	char ncform_sccsid[] = "@(#)ncform 1.6 88/02/08 SMI"; /* from S5R2 1.2 */
+#endif
+
+int yylineno =1;
+# define YYU(x) x
+# define NLSTATE yyprevious=YYNEWLINE
+char yytext[YYLMAX];
+struct yysvf *yylstate [YYLMAX], **yylsp, **yyolsp;
+char yysbuf[YYLMAX];
+char *yysptr = yysbuf;
+int *yyfnd;
+extern struct yysvf *yyestate;
+int yyprevious = YYNEWLINE;
+yylook(){
+	register struct yysvf *yystate, **lsp;
+	register struct yywork *yyt;
+	struct yysvf *yyz;
+	int yych, yyfirst;
+	struct yywork *yyr;
+# ifdef LEXDEBUG
+	int debug;
+# endif
+	char *yylastch;
+	/* start off machines */
+# ifdef LEXDEBUG
+	debug = 0;
+# endif
+	yyfirst=1;
+	if (!yymorfg)
+		yylastch = yytext;
+	else {
+		yymorfg=0;
+		yylastch = yytext+yyleng;
+		}
+	for(;;){
+		lsp = yylstate;
+		yyestate = yystate = yybgin;
+		if (yyprevious==YYNEWLINE) yystate++;
+		for (;;){
+# ifdef LEXDEBUG
+			if(debug)fprintf(yyout,"state %d\n",yystate-yysvec-1);
+# endif
+			yyt = yystate->yystoff;
+			if(yyt == yycrank && !yyfirst){  /* may not be any transitions */
+				yyz = yystate->yyother;
+				if(yyz == 0)break;
+				if(yyz->yystoff == yycrank)break;
+				}
+			*yylastch++ = yych = input();
+			yyfirst=0;
+		tryagain:
+# ifdef LEXDEBUG
+			if(debug){
+				fprintf(yyout,"char ");
+				allprint(yych);
+				putchar('\n');
+				}
+# endif
+			yyr = yyt;
+			if ( (int)yyt > (int)yycrank){
+				yyt = yyr + yych;
+				if (yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				}
+# ifdef YYOPTIM
+			else if((int)yyt < (int)yycrank) {		/* r < yycrank */
+				yyt = yyr = yycrank+(yycrank-yyt);
+# ifdef LEXDEBUG
+				if(debug)fprintf(yyout,"compressed state\n");
+# endif
+				yyt = yyt + yych;
+				if(yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				yyt = yyr + YYU(yymatch[yych]);
+# ifdef LEXDEBUG
+				if(debug){
+					fprintf(yyout,"try fall back character ");
+					allprint(YYU(yymatch[yych]));
+					putchar('\n');
+					}
+# endif
+				if(yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transition */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				}
+			if ((yystate = yystate->yyother) && (yyt= yystate->yystoff) != yycrank){
+# ifdef LEXDEBUG
+				if(debug)fprintf(yyout,"fall back to state %d\n",yystate-yysvec-1);
+# endif
+				goto tryagain;
+				}
+# endif
+			else
+				{unput(*--yylastch);break;}
+		contin:
+# ifdef LEXDEBUG
+			if(debug){
+				fprintf(yyout,"state %d char ",yystate-yysvec-1);
+				allprint(yych);
+				putchar('\n');
+				}
+# endif
+			;
+			}
+# ifdef LEXDEBUG
+		if(debug){
+			fprintf(yyout,"stopped at %d with ",*(lsp-1)-yysvec-1);
+			allprint(yych);
+			putchar('\n');
+			}
+# endif
+		while (lsp-- > yylstate){
+			*yylastch-- = 0;
+			if (*lsp != 0 && (yyfnd= (*lsp)->yystops) && *yyfnd > 0){
+				yyolsp = lsp;
+				if(yyextra[*yyfnd]){		/* must backup */
+					while(yyback((*lsp)->yystops,-*yyfnd) != 1 && lsp > yylstate){
+						lsp--;
+						unput(*yylastch--);
+						}
+					}
+				yyprevious = YYU(*yylastch);
+				yylsp = lsp;
+				yyleng = yylastch-yytext+1;
+				yytext[yyleng] = 0;
+# ifdef LEXDEBUG
+				if(debug){
+					fprintf(yyout,"\nmatch ");
+					sprint(yytext);
+					fprintf(yyout," action %d\n",*yyfnd);
+					}
+# endif
+				return(*yyfnd++);
+				}
+			unput(*yylastch);
+			}
+		if (yytext[0] == 0  /* && feof(yyin) */)
+			{
+			yysptr=yysbuf;
+			return(0);
+			}
+		yyprevious = yytext[0] = input();
+		if (yyprevious>0)
+			output(yyprevious);
+		yylastch=yytext;
+# ifdef LEXDEBUG
+		if(debug)putchar('\n');
+# endif
+		}
+	}
+yyback(p, m)
+	int *p;
+{
+if (p==0) return(0);
+while (*p)
+	{
+	if (*p++ == m)
+		return(1);
+	}
+return(0);
+}
+	/* the following are only used in the lex library */
+yyinput(){
+	return(input());
+	}
+yyoutput(c)
+  int c; {
+	output(c);
+	}
+yyunput(c)
+   int c; {
+	unput(c);
+	}
--- a/fixed/lua.c
+++ b/fixed/lua.c
@@ -0,0 +1,55 @@
+/*
+** lua.c
+** Linguagem para Usuarios de Aplicacao
+** TeCGraf - PUC-Rio
+** 28 Apr 93
+*/
+
+#include <stdio.h>
+
+#include "lua.h"
+#include "lualib.h"
+
+
+void test (void)
+{
+  lua_pushobject(lua_getparam(1));
+  lua_call ("c", 1);
+}
+
+
+static void callfunc (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj)) lua_call(lua_getstring(obj),0);
+}
+
+static void execstr (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj)) lua_dostring(lua_getstring(obj));
+}
+
+int main (int argc, char *argv[])
+{
+ int i;
+ if (argc < 2)
+ {
+  puts ("usage: lua filename [functionnames]");
+  return;
+ }
+ lua_register ("callfunc", callfunc);
+ lua_register ("execstr", execstr);
+ lua_register ("test", test);
+ iolib_open ();
+ strlib_open ();
+ mathlib_open ();
+ lua_dofile (argv[1]);
+ for (i=2; i<argc; i++)
+ {
+  lua_call (argv[i],0);
+ }
+ return 0;
+}
+
+
--- a/floatingpoint.h
+++ b/floatingpoint.h
@@ -0,0 +1 @@
+/* empty file to please silly code in iolib.c and opcode.c */
--- a/globals.lua
+++ b/globals.lua
@@ -0,0 +1,5 @@
+k,v=nextvar(k)
+while k do
+ print(k)
+ k,v=nextvar(k)
+end
--- a/hash.c
+++ b/hash.c
@@ -2,15 +2,13 @@
 ** hash.c
 ** hash manager for lua
 ** Luiz Henrique de Figueiredo - 17 Aug 90
+** Modified by Waldemar Celes Filho
+** 12 May 93
 */

-char *rcs_hash="$Id: hash.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
-
 #include <string.h>
 #include <stdlib.h>

-#include "mm.h"
-
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
@@ -26,20 +24,10 @@ char *rcs_hash="$Id: hash.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
 #define nhash(t)	((t)->nhash)
 #define nodelist(t)	((t)->list)
 #define list(t,i)	((t)->list[i])
-#define markarray(t)    ((t)->mark)
 #define ref_tag(n)	(tag(&(n)->ref))
 #define ref_nvalue(n)	(nvalue(&(n)->ref))
 #define ref_svalue(n)	(svalue(&(n)->ref))

-
-typedef struct ArrayList
-{
- Hash *array;
- struct ArrayList *next;
-} ArrayList;
-
-static ArrayList *listhead = NULL;
-
 static int head (Hash *t, Object *ref)		/* hash function */
 {
 if (tag(ref) == T_NUMBER) return (((int)nvalue(ref))%nhash(t));
@@ -101,7 +89,7 @@ static void freelist (Node *n)
 /*
 ** Create a new hash. Return the hash pointer or NULL on error.
 */
-static Hash *hashcreate (unsigned int nhash)
+Hash *lua_hashcreate (unsigned int nhash)
 {
 Hash *t = new (Hash);
 if (t == NULL)
@@ -123,7 +111,7 @@ static Hash *hashcreate (unsigned int nhash)
 /*
 ** Delete a hash
 */
-static void hashdelete (Hash *h)
+void lua_hashdelete (Hash *h)
 {
 int i;
 for (i=0; i<nhash(h); i++)
@@ -132,86 +120,6 @@ static void hashdelete (Hash *h)
 free(h);
 }

-
-/*
-** Mark a hash and check its elements 
-*/
-void lua_hashmark (Hash *h)
-{
- if (markarray(h) == 0)
- {
-  int i;
-  markarray(h) = 1;
-  for (i=0; i<nhash(h); i++)
-  {
-   Node *n;
-   for (n = list(h,i); n != NULL; n = n->next)
-   {
-    lua_markobject(&n->ref);
-    lua_markobject(&n->val);
-   }
-  }
- } 
-}
- 
-/*
-** Garbage collection to arrays
-** Delete all unmarked arrays.
-*/
-void lua_hashcollector (void)
-{
- ArrayList *curr = listhead, *prev = NULL;
- while (curr != NULL)
- {
-  ArrayList *next = curr->next;
-  if (markarray(curr->array) != 1)
-  {
-   if (prev == NULL) listhead = next;
-   else              prev->next = next;
-   hashdelete(curr->array);
-   free(curr);
-  }
-  else
-  {
-   markarray(curr->array) = 0;
-   prev = curr;
-  }
-  curr = next;
- }
-}
-
-
-/*
-** Create a new array
-** This function insert the new array at array list. It also
-** execute garbage collection if the number of array created
-** exceed a pre-defined range.
-*/
-Hash *lua_createarray (int nhash)
-{
- ArrayList *new = new(ArrayList);
- if (new == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- new->array = hashcreate(nhash);
- if (new->array == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
-
- if (lua_nentity == lua_block)
-  lua_pack(); 
-
- lua_nentity++;
- new->next = listhead;
- listhead = new;
- return new->array;
-}
-
-
 /*
 ** If the hash node is present, return its pointer, otherwise create a new
 ** node for the given reference and also return its pointer.
@@ -241,6 +149,26 @@ Object *lua_hashdefine (Hash *t, Object *ref)
 return (&n->val);
 }

+/*
+** Mark a hash and check its elements 
+*/
+void lua_hashmark (Hash *h)
+{
+ int i;
+ 
+ markarray(h) = 1;
+ 
+ for (i=0; i<nhash(h); i++)
+ {
+  Node *n;
+  for (n = list(h,i); n != NULL; n = n->next)
+  {
+   lua_markobject (&n->ref);
+   lua_markobject (&n->val);
+  }
+ }
+}
+

 /*
 ** Internal function to manipulate arrays. 
@@ -248,6 +176,7 @@ Object *lua_hashdefine (Hash *t, Object *ref)
 ** in the hash.
 ** This function pushs the element value and its reference to the stack.
 */
+#include "lua.h"
 static void firstnode (Hash *a, int h)
 {
 if (h < nhash(a))
@@ -255,25 +184,11 @@ static void firstnode (Hash *a, int h)
  int i;
  for (i=h; i<nhash(a); i++)
  {
-   if (list(a,i) != NULL)
+   if (list(a,i) != NULL && tag(&list(a,i)->val) != T_NIL)
   {
-    if (tag(&list(a,i)->val) != T_NIL)
-    {
-     lua_pushobject (&list(a,i)->ref);
-     lua_pushobject (&list(a,i)->val);
-     return;
-    }
-    else
-    {
-     Node *next = list(a,i)->next;
-     while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-     if (next != NULL)
-     {
-      lua_pushobject (&next->ref);
-      lua_pushobject (&next->val);
-      return;
-     }
-    }
+    lua_pushobject (&list(a,i)->ref);
+    lua_pushobject (&list(a,i)->val);
+    return;
   }
  }
 }
@@ -342,4 +257,3 @@ void lua_next (void)
  }
 }
 }
-
--- a/hash.h
+++ b/hash.h
@@ -2,7 +2,8 @@
 ** hash.h
 ** hash manager for lua
 ** Luiz Henrique de Figueiredo - 17 Aug 90
-** $Id: hash.h,v 1.1 1993/12/17 18:41:19 celes Exp celes $
+** Modified by Waldemar Celes Filho
+** 26 Apr 93
 */

 #ifndef hash_h
@@ -22,11 +23,13 @@ typedef struct Hash
 Node         **list;
 } Hash;

+#define markarray(t)		((t)->mark)

-Hash    *lua_createarray (int nhash);
-void     lua_hashmark (Hash *h);
-void     lua_hashcollector (void);
+Hash 	*lua_hashcreate (unsigned int nhash);
+void 	 lua_hashdelete (Hash *h);
 Object 	*lua_hashdefine (Hash *t, Object *ref);
+void 	 lua_hashmark   (Hash *h);
+
 void     lua_next (void);

 #endif
--- a/inout.c
+++ b/inout.c
@@ -2,10 +2,12 @@
 ** inout.c
 ** Provide function to realise the input/output function and debugger 
 ** facilities.
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 11 May 93
 */

-char *rcs_inout="$Id: inout.c,v 1.2 1993/12/22 21:15:16 roberto Exp celes $";
-
 #include <stdio.h>
 #include <string.h>

@@ -13,7 +15,6 @@ char *rcs_inout="$Id: inout.c,v 1.2 1993/12/22 21:15:16 roberto Exp celes $";
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
-#include "tree.h"

 /* Exported variables */
 int lua_linenumber;
@@ -48,6 +49,14 @@ static int fileinput (void)
 return (c == EOF ? 0 : c);
 }

+/*
+** Function to unget the next character from to input file
+*/
+static void fileunput (int c)
+{
+ ungetc (c, fp);
+}
+
 /*
 ** Function to get the next character from the input string
 */
@@ -57,6 +66,14 @@ static int stringinput (void)
 return (*(st-1));
 }

+/*
+** Function to unget the next character from to input string
+*/
+static void stringunput (int c)
+{
+ st--;
+}
+
 /*
 ** Function to open a file to be input unit. 
 ** Return 0 on success or 1 on error.
@@ -65,6 +82,7 @@ int lua_openfile (char *fn)
 {
 lua_linenumber = 1;
 lua_setinput (fileinput);
+ lua_setunput (fileunput);
 fp = fopen (fn, "r");
 if (fp == NULL) return 1;
 if (lua_addfile (fn)) return 1;
@@ -78,7 +96,6 @@ void lua_closefile (void)
 {
 if (fp != NULL)
 {
-  lua_delfile();
  fclose (fp);
  fp = NULL;
 }
@@ -91,6 +108,7 @@ int lua_openstring (char *s)
 {
 lua_linenumber = 1;
 lua_setinput (stringinput);
+ lua_setunput (stringunput);
 st = s;
 {
  char sn[64];
@@ -100,14 +118,6 @@ int lua_openstring (char *s)
 return 0;
 }

-/*
-** Function to close an opened string
-*/
-void lua_closestring (void)
-{
- lua_delfile();
-}
-
 /*
 ** Call user function to handle error messages, if registred. Or report error
 ** using standard function (fprintf).
@@ -158,12 +168,12 @@ void lua_reportbug (char *s)
  {
   sprintf (strchr(msg,0), 
         "\n\tin statement begining at line %d in function \"%s\" of file \"%s\"",
-         lua_debugline, lua_varname(funcstack[nfuncstack-1].function),
+         lua_debugline, s_name(funcstack[nfuncstack-1].function),
  	 lua_file[funcstack[nfuncstack-1].file]);
   sprintf (strchr(msg,0), "\n\tactive stack\n");
   for (i=nfuncstack-1; i>=0; i--)
    sprintf (strchr(msg,0), "\t-> function \"%s\" of file \"%s\"\n", 
-                            lua_varname(funcstack[i].function),
+                            s_name(funcstack[i].function),
 			    lua_file[funcstack[i].file]);
  }
  else
--- a/inout.h
+++ b/inout.h
@@ -1,5 +1,9 @@
 /*
-** $Id: $
+** inout.h
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 11 May 93
 */


@@ -13,7 +17,6 @@ extern int lua_debugline;
 int  lua_openfile     (char *fn);
 void lua_closefile    (void);
 int  lua_openstring   (char *s);
-void lua_closestring  (void);
 int  lua_pushfunction (int file, int function);
 void lua_popfunction  (void);
 void lua_reportbug    (char *s);
--- a/iolib.c
+++ b/iolib.c
@@ -1,21 +1,20 @@
 /*
 ** iolib.c
 ** Input/output library to LUA
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 19 May 93
 */

-char *rcs_iolib="$Id: iolib.c,v 1.3 1994/03/28 15:14:02 celes Exp celes $";
-
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <ctype.h>
-#include <sys/stat.h>
 #ifdef __GNUC__
 #include <floatingpoint.h>
 #endif

-#include "mm.h"
-
 #include "lua.h"

 static FILE *in=stdin, *out=stdout;
@@ -110,58 +109,6 @@ static void io_writeto (void)
 }


-/*
-** Open a file to write appended.
-** LUA interface:
-**			status = appendto (filename)
-** where:
-**			status = 2 -> success (already exist)
-**			status = 1 -> success (new file)
-**			status = 0 -> error
-*/
-static void io_appendto (void)
-{
- lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
- {
-  if (out != stdout)
-  {
-   fclose (out);
-   out = stdout;
-  }
-  lua_pushnumber (1);
- }
- else
- {
-  if (!lua_isstring (o))
-  {
-   lua_error ("incorrect argument to function 'appendto`");
-   lua_pushnumber (0);
-  }
-  else
-  {
-   int r;
-   FILE *fp;
-   struct stat st;
-   if (stat(lua_getstring(o), &st) == -1) r = 1;
-   else                                   r = 2;
-   fp = fopen (lua_getstring(o),"a");
-   if (fp == NULL)
-   {
-    lua_pushnumber (0);
-   }
-   else
-   {
-    if (out != stdout) fclose (out);
-    out = fp;
-    lua_pushnumber (r);
-   }
-  }
- }
-}
-
-
-
 /*
 ** Read a variable. On error put nil on stack.
 ** LUA interface:
@@ -179,7 +126,7 @@ static void io_appendto (void)
 static void io_read (void)
 {
 lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring(o))	/* free format */
+ if (o == NULL)			/* free format */
 {
  int c;
  char s[256];
@@ -187,31 +134,19 @@ static void io_read (void)
   ;
  if (c == '\"')
  {
-   int c, n=0;
-   while((c = fgetc(in)) != '\"')
+   if (fscanf (in, "%[^\"]\"", s) != 1)
   {
-    if (c == EOF)
-    {
-     lua_pushnil ();
-     return;
-    }
-    s[n++] = c;
+    lua_pushnil ();
+    return;
   }
-   s[n] = 0;
  }
  else if (c == '\'')
  {
-   int c, n=0;
-   while((c = fgetc(in)) != '\'')
+   if (fscanf (in, "%[^\']\'", s) != 1)
   {
-    if (c == EOF)
-    {
-     lua_pushnil ();
-     return;
-    }
-    s[n++] = c;
+    lua_pushnil ();
+    return;
   }
-   s[n] = 0;
  }
  else
  {
@@ -248,16 +183,7 @@ static void io_read (void)
   char f[80];
   char s[256];
   sprintf (f, "%%%ds", m);
-   if (fgets (s, m, in) == NULL)
-   {
-    lua_pushnil();
-    return;
-   }
-   else
-   {
-    if (s[strlen(s)-1] == '\n')
-     s[strlen(s)-1] = 0;
-   }
+   fscanf (in, f, s);
   switch (tolower(t))
   {
    case 'i':
@@ -286,25 +212,22 @@ static void io_read (void)
    case 'i':
    {
     long int l;
-     if (fscanf (in, "%ld", &l) == EOF)
-       lua_pushnil();
-       else lua_pushnumber(l);
+     fscanf (in, "%ld", &l);
+     lua_pushnumber(l);
    }
    break;
    case 'f': case 'g': case 'e':
    {
     float f;
-     if (fscanf (in, "%f", &f) == EOF)
-       lua_pushnil();
-       else lua_pushnumber(f);
+     fscanf (in, "%f", &f);
+     lua_pushnumber(f);
    }
    break;
    default: 
    {
     char s[256];
-     if (fscanf (in, "%s", s) == EOF)
-       lua_pushnil();
-       else lua_pushstring(s);
+     fscanf (in, "%s", s);
+     lua_pushstring(s);
    }
    break;
   }
@@ -423,8 +346,8 @@ static void io_write (void)
 }

 /*
-** Execute a executable program using "system".
-** Return the result of execution.
+** Execute a executable program using "sustem".
+** On error put 0 on stack, otherwise put 1.
 */
 void io_execute (void)
 {
@@ -436,8 +359,8 @@ void io_execute (void)
 }
 else
 {
-  int res = system(lua_getstring(o));
-  lua_pushnumber (res);
+  system(lua_getstring(o));
+  lua_pushnumber (1);
 }
 return;
 }
@@ -471,7 +394,6 @@ void iolib_open (void)
 {
 lua_register ("readfrom", io_readfrom);
 lua_register ("writeto",  io_writeto);
- lua_register ("appendto", io_appendto);
 lua_register ("read",     io_read);
 lua_register ("write",    io_write);
 lua_register ("execute",  io_execute);
--- a/lex.c
+++ b/lex.c
@@ -1,233 +0,0 @@
-char *rcs_lex = "$Id: lex.c,v 1.3 1993/12/28 16:42:29 roberto Exp celes $";
-/*$Log: lex.c,v $
- * Revision 1.3  1993/12/28  16:42:29  roberto
- * "include"s de string.h e stdlib.h para evitar warnings
- *
- * Revision 1.2  1993/12/22  21:39:15  celes
- * Tratamento do token $debug e $nodebug
- *
- * Revision 1.1  1993/12/22  21:15:16  roberto
- * Initial revision
- **/
-
-#include <ctype.h>
-#include <math.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y.tab.h"
-
-#define next() { current = input(); }
-#define save(x) { *yytextLast++ = (x); }
-#define save_and_next()  { save(current); next(); }
-
-static int current;
-static char yytext[256];
-static char *yytextLast;
-
-static Input input;
-
-void lua_setinput (Input fn)
-{
-  current = ' ';
-  input = fn;
-}
-
-char *lua_lasttext (void)
-{
-  *yytextLast = 0;
-  return yytext;
-}
-
-
-static struct 
-  {
-    char *name;
-    int token;
-  } reserved [] = {
-      {"and", AND},
-      {"do", DO},
-      {"else", ELSE},
-      {"elseif", ELSEIF},
-      {"end", END},
-      {"function", FUNCTION},
-      {"if", IF},
-      {"local", LOCAL},
-      {"nil", NIL},
-      {"not", NOT},
-      {"or", OR},
-      {"repeat", REPEAT},
-      {"return", RETURN},
-      {"then", THEN},
-      {"until", UNTIL},
-      {"while", WHILE} };
-
-#define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0]))
-
-
-int findReserved (char *name)
-{
-  int l = 0;
-  int h = RESERVEDSIZE - 1;
-  while (l <= h)
-  {
-    int m = (l+h)/2;
-    int comp = strcmp(name, reserved[m].name);
-    if (comp < 0)
-      h = m-1;
-    else if (comp == 0)
-      return reserved[m].token;
-    else
-      l = m+1;
-  }
-  return 0;
-}
-
-
-int yylex ()
-{
-  while (1)
-  {
-    yytextLast = yytext;
-    switch (current)
-    {
-      case '\n': lua_linenumber++;
-      case ' ':
-      case '\t':
-        next();
-        continue;
-
-      case '$':
-	next();
-	while (isalnum(current) || current == '_')
-          save_and_next();
-        *yytextLast = 0;
-	if (strcmp(yytext, "debug") == 0)
-	{
-	  yylval.vInt = 1;
-	  return DEBUG;
-        }
-	else if (strcmp(yytext, "nodebug") == 0)
-	{
-	  yylval.vInt = 0;
-	  return DEBUG;
-        }
-	return WRONGTOKEN;
-  
-      case '-':
-        save_and_next();
-        if (current != '-') return '-';
-        do { next(); } while (current != '\n' && current != 0);
-        continue;
-  
-      case '<':
-        save_and_next();
-        if (current != '=') return '<';
-        else { save_and_next(); return LE; }
-  
-      case '>':
-        save_and_next();
-        if (current != '=') return '>';
-        else { save_and_next(); return GE; }
-  
-      case '~':
-        save_and_next();
-        if (current != '=') return '~';
-        else { save_and_next(); return NE; }
-
-      case '"':
-      case '\'':
-      {
-        int del = current;
-        next();  /* skip the delimiter */
-        while (current != del) 
-        {
-          switch (current)
-          {
-            case 0: 
-            case '\n': 
-              return WRONGTOKEN;
-            case '\\':
-              next();  /* do not save the '\' */
-              switch (current)
-              {
-                case 'n': save('\n'); next(); break;
-                case 't': save('\t'); next(); break;
-                case 'r': save('\r'); next(); break;
-                default : save('\\'); break;
-              }
-              break;
-            default: 
-              save_and_next();
-          }
-        }
-        next();  /* skip the delimiter */
-        *yytextLast = 0;
-        yylval.vWord = lua_findconstant (yytext);
-        return STRING;
-      }
-
-      case 'a': case 'b': case 'c': case 'd': case 'e':
-      case 'f': case 'g': case 'h': case 'i': case 'j':
-      case 'k': case 'l': case 'm': case 'n': case 'o':
-      case 'p': case 'q': case 'r': case 's': case 't':
-      case 'u': case 'v': case 'w': case 'x': case 'y':
-      case 'z':
-      case 'A': case 'B': case 'C': case 'D': case 'E':
-      case 'F': case 'G': case 'H': case 'I': case 'J':
-      case 'K': case 'L': case 'M': case 'N': case 'O':
-      case 'P': case 'Q': case 'R': case 'S': case 'T':
-      case 'U': case 'V': case 'W': case 'X': case 'Y':
-      case 'Z':
-      case '_':
-      {
-        int res;
-        do { save_and_next(); } while (isalnum(current) || current == '_');
-        *yytextLast = 0;
-        res = findReserved(yytext);
-        if (res) return res;
-        yylval.pChar = yytext;
-        return NAME;
-      }
-   
-      case '.':
-        save_and_next();
-        if (current == '.') 
-        { 
-          save_and_next(); 
-          return CONC;
-        }
-        else if (!isdigit(current)) return '.';
-        /* current is a digit: goes through to number */
-        goto fraction;
-
-      case '0': case '1': case '2': case '3': case '4':
-      case '5': case '6': case '7': case '8': case '9':
-      
-        do { save_and_next(); } while (isdigit(current));
-        if (current == '.') save_and_next();
-fraction: while (isdigit(current)) save_and_next();
-        if (current == 'e' || current == 'E')
-        {
-          save_and_next();
-          if (current == '+' || current == '-') save_and_next();
-          if (!isdigit(current)) return WRONGTOKEN;
-          do { save_and_next(); } while (isdigit(current));
-        }
-        *yytextLast = 0;
-        yylval.vFloat = atof(yytext);
-        return NUMBER;
-
-      default: 		/* also end of file */
-      {
-        save_and_next();
-        return *yytext;      
-      }
-    }
-  }
-}
-        
--- a/lex_yy.c
+++ b/lex_yy.c
@@ -0,0 +1,923 @@
+# include "stdio.h"
+# define U(x) x
+# define NLSTATE yyprevious=YYNEWLINE
+# define BEGIN yybgin = yysvec + 1 +
+# define INITIAL 0
+# define YYLERR yysvec
+# define YYSTATE (yyestate-yysvec-1)
+# define YYOPTIM 1
+# define YYLMAX BUFSIZ
+# define output(c) putc(c,yyout)
+# define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==10?(yylineno++,yytchar):yytchar)==EOF?0:yytchar)
+# define unput(c) {yytchar= (c);if(yytchar=='\n')yylineno--;*yysptr++=yytchar;}
+# define yymore() (yymorfg=1)
+# define ECHO fprintf(yyout, "%s",yytext)
+# define REJECT { nstr = yyreject(); goto yyfussy;}
+int yyleng; extern char yytext[];
+int yymorfg;
+extern char *yysptr, yysbuf[];
+int yytchar;
+FILE *yyin = {stdin}, *yyout = {stdout};
+extern int yylineno;
+struct yysvf { 
+	struct yywork *yystoff;
+	struct yysvf *yyother;
+	int *yystops;};
+struct yysvf *yyestate;
+extern struct yysvf yysvec[], *yybgin;
+#include <stdlib.h>
+#include <string.h>
+
+#include "opcode.h"
+#include "hash.h"
+#include "inout.h"
+#include "table.h"
+#include "y_tab.h"
+
+#undef input
+#undef unput
+
+static Input input;
+static Unput unput;
+
+void lua_setinput (Input fn)
+{
+ input = fn;
+}
+
+void lua_setunput (Unput fn)
+{
+ unput = fn;
+}
+
+char *lua_lasttext (void)
+{
+ return yytext;
+}
+
+# define YYNEWLINE 10
+yylex(){
+int nstr; extern int yyprevious;
+while((nstr = yylook()) >= 0)
+yyfussy: switch(nstr){
+case 0:
+if(yywrap()) return(0); break;
+case 1:
+				;
+break;
+case 2:
+			{yylval.vInt = 1; return DEBUG;}
+break;
+case 3:
+			{yylval.vInt = 0; return DEBUG;}
+break;
+case 4:
+				lua_linenumber++;
+break;
+case 5:
+				;
+break;
+case 6:
+				return LOCAL;
+break;
+case 7:
+				return IF;
+break;
+case 8:
+				return THEN;
+break;
+case 9:
+				return ELSE;
+break;
+case 10:
+			return ELSEIF;
+break;
+case 11:
+				return WHILE;
+break;
+case 12:
+				return DO;
+break;
+case 13:
+			return REPEAT;
+break;
+case 14:
+				return UNTIL;
+break;
+case 15:
+			{
+                                         yylval.vWord = lua_nfile-1;
+                                         return FUNCTION;
+					}
+break;
+case 16:
+				return END;
+break;
+case 17:
+				return RETURN;
+break;
+case 18:
+				return LOCAL;
+break;
+case 19:
+				return NIL;
+break;
+case 20:
+				return AND;
+break;
+case 21:
+				return OR;
+break;
+case 22:
+				return NOT;
+break;
+case 23:
+				return NE;
+break;
+case 24:
+				return LE;
+break;
+case 25:
+				return GE;
+break;
+case 26:
+				return CONC;
+break;
+case 27:
+			case 28:
+		      {
+				       yylval.vWord = lua_findenclosedconstant (yytext);
+				       return STRING;
+				      }
+break;
+case 29:
+case 30:
+case 31:
+case 32:
+{
+				        yylval.vFloat = atof(yytext);
+				        return NUMBER;
+				       }
+break;
+case 33:
+ 	       {
+					yylval.vWord = lua_findsymbol (yytext);
+					return NAME;
+				       }
+break;
+case 34:
+				return  *yytext;
+break;
+case -1:
+break;
+default:
+fprintf(yyout,"bad switch yylook %d",nstr);
+} return(0); }
+/* end of yylex */
+int yyvstop[] = {
+0,
+
+1,
+0,
+
+1,
+0,
+
+34,
+0,
+
+1,
+34,
+0,
+
+4,
+0,
+
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+29,
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+33,
+34,
+0,
+
+34,
+0,
+
+34,
+0,
+
+1,
+0,
+
+27,
+0,
+
+28,
+0,
+
+5,
+0,
+
+26,
+0,
+
+30,
+0,
+
+29,
+0,
+
+29,
+0,
+
+24,
+0,
+
+25,
+0,
+
+33,
+0,
+
+33,
+0,
+
+12,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+7,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+21,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+23,
+0,
+
+29,
+30,
+0,
+
+31,
+0,
+
+20,
+33,
+0,
+
+33,
+0,
+
+16,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+19,
+33,
+0,
+
+22,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+32,
+0,
+
+9,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+8,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+31,
+32,
+0,
+
+33,
+0,
+
+33,
+0,
+
+6,
+18,
+33,
+0,
+
+33,
+0,
+
+33,
+0,
+
+14,
+33,
+0,
+
+11,
+33,
+0,
+
+10,
+33,
+0,
+
+33,
+0,
+
+13,
+33,
+0,
+
+17,
+33,
+0,
+
+2,
+0,
+
+33,
+0,
+
+15,
+33,
+0,
+
+3,
+0,
+0};
+# define YYTYPE char
+struct yywork { YYTYPE verify, advance; } yycrank[] = {
+0,0,	0,0,	1,3,	0,0,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	1,4,	1,5,	
+6,29,	4,28,	0,0,	0,0,	
+0,0,	0,0,	7,31,	0,0,	
+6,29,	6,29,	0,0,	0,0,	
+0,0,	0,0,	7,31,	7,31,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	0,0,	1,6,	
+4,28,	0,0,	0,0,	0,0,	
+1,7,	0,0,	0,0,	0,0,	
+1,3,	6,30,	1,8,	1,9,	
+0,0,	1,10,	6,29,	7,31,	
+8,33,	0,0,	6,29,	0,0,	
+7,32,	0,0,	0,0,	6,29,	
+7,31,	1,11,	0,0,	1,12,	
+2,27,	7,31,	1,13,	11,39,	
+12,40,	1,13,	26,56,	0,0,	
+0,0,	2,8,	2,9,	0,0,	
+6,29,	0,0,	0,0,	6,29,	
+0,0,	0,0,	7,31,	0,0,	
+0,0,	7,31,	0,0,	0,0,	
+2,11,	0,0,	2,12,	0,0,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	1,14,	0,0,	
+0,0,	1,15,	1,16,	1,17,	
+0,0,	22,52,	1,18,	18,47,	
+23,53,	1,19,	42,63,	1,20,	
+1,21,	25,55,	14,42,	1,22,	
+15,43,	1,23,	1,24,	16,44,	
+1,25,	16,45,	17,46,	19,48,	
+21,51,	2,14,	20,49,	1,26,	
+2,15,	2,16,	2,17,	24,54,	
+20,50,	2,18,	44,64,	45,65,	
+2,19,	46,66,	2,20,	2,21,	
+27,57,	48,67,	2,22,	49,68,	
+2,23,	2,24,	50,69,	2,25,	
+52,70,	53,72,	27,58,	54,73,	
+52,71,	9,34,	2,26,	9,35,	
+9,35,	9,35,	9,35,	9,35,	
+9,35,	9,35,	9,35,	9,35,	
+9,35,	10,36,	55,74,	10,37,	
+10,37,	10,37,	10,37,	10,37,	
+10,37,	10,37,	10,37,	10,37,	
+10,37,	57,75,	58,76,	64,80,	
+66,81,	67,82,	70,83,	71,84,	
+72,85,	73,86,	74,87,	10,38,	
+10,38,	38,61,	10,38,	38,61,	
+75,88,	76,89,	38,62,	38,62,	
+38,62,	38,62,	38,62,	38,62,	
+38,62,	38,62,	38,62,	38,62,	
+80,92,	81,93,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+82,94,	83,95,	84,96,	10,38,	
+10,38,	86,97,	10,38,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	87,98,	88,99,	60,79,	
+60,79,	13,41,	60,79,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	13,41,	13,41,	13,41,	
+13,41,	33,33,	89,100,	60,79,	
+60,79,	92,101,	60,79,	93,102,	
+95,103,	33,33,	33,0,	96,104,	
+99,105,	100,106,	102,107,	106,108,	
+107,109,	35,35,	35,35,	35,35,	
+35,35,	35,35,	35,35,	35,35,	
+35,35,	35,35,	35,35,	108,110,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	0,0,	33,33,	0,0,	
+0,0,	35,59,	35,59,	33,33,	
+35,59,	0,0,	0,0,	33,33,	
+0,0,	0,0,	0,0,	0,0,	
+33,33,	0,0,	0,0,	0,0,	
+0,0,	36,60,	36,60,	36,60,	
+36,60,	36,60,	36,60,	36,60,	
+36,60,	36,60,	36,60,	0,0,	
+0,0,	33,33,	0,0,	0,0,	
+33,33,	35,59,	35,59,	0,0,	
+35,59,	36,38,	36,38,	59,77,	
+36,38,	59,77,	0,0,	0,0,	
+59,78,	59,78,	59,78,	59,78,	
+59,78,	59,78,	59,78,	59,78,	
+59,78,	59,78,	61,62,	61,62,	
+61,62,	61,62,	61,62,	61,62,	
+61,62,	61,62,	61,62,	61,62,	
+0,0,	0,0,	0,0,	0,0,	
+0,0,	36,38,	36,38,	0,0,	
+36,38,	77,78,	77,78,	77,78,	
+77,78,	77,78,	77,78,	77,78,	
+77,78,	77,78,	77,78,	79,90,	
+0,0,	79,90,	0,0,	0,0,	
+79,91,	79,91,	79,91,	79,91,	
+79,91,	79,91,	79,91,	79,91,	
+79,91,	79,91,	90,91,	90,91,	
+90,91,	90,91,	90,91,	90,91,	
+90,91,	90,91,	90,91,	90,91,	
+0,0};
+struct yysvf yysvec[] = {
+0,	0,	0,
+yycrank+-1,	0,		yyvstop+1,
+yycrank+-28,	yysvec+1,	yyvstop+3,
+yycrank+0,	0,		yyvstop+5,
+yycrank+4,	0,		yyvstop+7,
+yycrank+0,	0,		yyvstop+10,
+yycrank+-11,	0,		yyvstop+12,
+yycrank+-17,	0,		yyvstop+14,
+yycrank+7,	0,		yyvstop+16,
+yycrank+107,	0,		yyvstop+18,
+yycrank+119,	0,		yyvstop+20,
+yycrank+6,	0,		yyvstop+23,
+yycrank+7,	0,		yyvstop+25,
+yycrank+158,	0,		yyvstop+27,
+yycrank+4,	yysvec+13,	yyvstop+30,
+yycrank+5,	yysvec+13,	yyvstop+33,
+yycrank+11,	yysvec+13,	yyvstop+36,
+yycrank+5,	yysvec+13,	yyvstop+39,
+yycrank+5,	yysvec+13,	yyvstop+42,
+yycrank+12,	yysvec+13,	yyvstop+45,
+yycrank+21,	yysvec+13,	yyvstop+48,
+yycrank+10,	yysvec+13,	yyvstop+51,
+yycrank+4,	yysvec+13,	yyvstop+54,
+yycrank+4,	yysvec+13,	yyvstop+57,
+yycrank+21,	yysvec+13,	yyvstop+60,
+yycrank+9,	yysvec+13,	yyvstop+63,
+yycrank+9,	0,		yyvstop+66,
+yycrank+40,	0,		yyvstop+68,
+yycrank+0,	yysvec+4,	yyvstop+70,
+yycrank+0,	yysvec+6,	0,	
+yycrank+0,	0,		yyvstop+72,
+yycrank+0,	yysvec+7,	0,	
+yycrank+0,	0,		yyvstop+74,
+yycrank+-280,	0,		yyvstop+76,
+yycrank+0,	0,		yyvstop+78,
+yycrank+249,	0,		yyvstop+80,
+yycrank+285,	0,		yyvstop+82,
+yycrank+0,	yysvec+10,	yyvstop+84,
+yycrank+146,	0,		0,	
+yycrank+0,	0,		yyvstop+86,
+yycrank+0,	0,		yyvstop+88,
+yycrank+0,	yysvec+13,	yyvstop+90,
+yycrank+10,	yysvec+13,	yyvstop+92,
+yycrank+0,	yysvec+13,	yyvstop+94,
+yycrank+19,	yysvec+13,	yyvstop+97,
+yycrank+35,	yysvec+13,	yyvstop+99,
+yycrank+27,	yysvec+13,	yyvstop+101,
+yycrank+0,	yysvec+13,	yyvstop+103,
+yycrank+42,	yysvec+13,	yyvstop+106,
+yycrank+35,	yysvec+13,	yyvstop+108,
+yycrank+30,	yysvec+13,	yyvstop+110,
+yycrank+0,	yysvec+13,	yyvstop+112,
+yycrank+36,	yysvec+13,	yyvstop+115,
+yycrank+48,	yysvec+13,	yyvstop+117,
+yycrank+35,	yysvec+13,	yyvstop+119,
+yycrank+61,	yysvec+13,	yyvstop+121,
+yycrank+0,	0,		yyvstop+123,
+yycrank+76,	0,		0,	
+yycrank+67,	0,		0,	
+yycrank+312,	0,		0,	
+yycrank+183,	yysvec+36,	yyvstop+125,
+yycrank+322,	0,		0,	
+yycrank+0,	yysvec+61,	yyvstop+128,
+yycrank+0,	yysvec+13,	yyvstop+130,
+yycrank+78,	yysvec+13,	yyvstop+133,
+yycrank+0,	yysvec+13,	yyvstop+135,
+yycrank+81,	yysvec+13,	yyvstop+138,
+yycrank+84,	yysvec+13,	yyvstop+140,
+yycrank+0,	yysvec+13,	yyvstop+142,
+yycrank+0,	yysvec+13,	yyvstop+145,
+yycrank+81,	yysvec+13,	yyvstop+148,
+yycrank+66,	yysvec+13,	yyvstop+150,
+yycrank+74,	yysvec+13,	yyvstop+152,
+yycrank+80,	yysvec+13,	yyvstop+154,
+yycrank+78,	yysvec+13,	yyvstop+156,
+yycrank+94,	0,		0,	
+yycrank+93,	0,		0,	
+yycrank+341,	0,		0,	
+yycrank+0,	yysvec+77,	yyvstop+158,
+yycrank+356,	0,		0,	
+yycrank+99,	yysvec+13,	yyvstop+160,
+yycrank+89,	yysvec+13,	yyvstop+163,
+yycrank+108,	yysvec+13,	yyvstop+165,
+yycrank+120,	yysvec+13,	yyvstop+167,
+yycrank+104,	yysvec+13,	yyvstop+169,
+yycrank+0,	yysvec+13,	yyvstop+171,
+yycrank+113,	yysvec+13,	yyvstop+174,
+yycrank+148,	yysvec+13,	yyvstop+176,
+yycrank+133,	0,		0,	
+yycrank+181,	0,		0,	
+yycrank+366,	0,		0,	
+yycrank+0,	yysvec+90,	yyvstop+178,
+yycrank+183,	yysvec+13,	yyvstop+181,
+yycrank+182,	yysvec+13,	yyvstop+183,
+yycrank+0,	yysvec+13,	yyvstop+185,
+yycrank+172,	yysvec+13,	yyvstop+189,
+yycrank+181,	yysvec+13,	yyvstop+191,
+yycrank+0,	yysvec+13,	yyvstop+193,
+yycrank+0,	yysvec+13,	yyvstop+196,
+yycrank+189,	0,		0,	
+yycrank+195,	0,		0,	
+yycrank+0,	yysvec+13,	yyvstop+199,
+yycrank+183,	yysvec+13,	yyvstop+202,
+yycrank+0,	yysvec+13,	yyvstop+204,
+yycrank+0,	yysvec+13,	yyvstop+207,
+yycrank+0,	0,		yyvstop+210,
+yycrank+178,	0,		0,	
+yycrank+186,	yysvec+13,	yyvstop+212,
+yycrank+204,	0,		0,	
+yycrank+0,	yysvec+13,	yyvstop+214,
+yycrank+0,	0,		yyvstop+217,
+0,	0,	0};
+struct yywork *yytop = yycrank+423;
+struct yysvf *yybgin = yysvec+1;
+char yymatch[] = {
+00  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,011 ,012 ,01  ,01  ,01  ,01  ,01  ,
+01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,01  ,01  ,01  ,01  ,01  ,01  ,01  ,
+011 ,01  ,'"' ,01  ,01  ,01  ,01  ,047 ,
+01  ,01  ,01  ,'+' ,01  ,'+' ,01  ,01  ,
+'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,
+'0' ,'0' ,01  ,01  ,01  ,01  ,01  ,01  ,
+01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,'A' ,
+01  ,'A' ,'A' ,'A' ,'D' ,'D' ,'A' ,'D' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
+'A' ,'A' ,'A' ,01  ,01  ,01  ,01  ,01  ,
+0};
+char yyextra[] = {
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0,0,0,0,0,0,0,0,
+0};
+#ifndef lint
+static	char ncform_sccsid[] = "@(#)ncform 1.6 88/02/08 SMI"; /* from S5R2 1.2 */
+#endif
+
+int yylineno =1;
+# define YYU(x) x
+# define NLSTATE yyprevious=YYNEWLINE
+char yytext[YYLMAX];
+struct yysvf *yylstate [YYLMAX], **yylsp, **yyolsp;
+char yysbuf[YYLMAX];
+char *yysptr = yysbuf;
+int *yyfnd;
+extern struct yysvf *yyestate;
+int yyprevious = YYNEWLINE;
+yylook(){
+	register struct yysvf *yystate, **lsp;
+	register struct yywork *yyt;
+	struct yysvf *yyz;
+	int yych, yyfirst;
+	struct yywork *yyr;
+# ifdef LEXDEBUG
+	int debug;
+# endif
+	char *yylastch;
+	/* start off machines */
+# ifdef LEXDEBUG
+	debug = 0;
+# endif
+	yyfirst=1;
+	if (!yymorfg)
+		yylastch = yytext;
+	else {
+		yymorfg=0;
+		yylastch = yytext+yyleng;
+		}
+	for(;;){
+		lsp = yylstate;
+		yyestate = yystate = yybgin;
+		if (yyprevious==YYNEWLINE) yystate++;
+		for (;;){
+# ifdef LEXDEBUG
+			if(debug)fprintf(yyout,"state %d\n",yystate-yysvec-1);
+# endif
+			yyt = yystate->yystoff;
+			if(yyt == yycrank && !yyfirst){  /* may not be any transitions */
+				yyz = yystate->yyother;
+				if(yyz == 0)break;
+				if(yyz->yystoff == yycrank)break;
+				}
+			*yylastch++ = yych = input();
+			yyfirst=0;
+		tryagain:
+# ifdef LEXDEBUG
+			if(debug){
+				fprintf(yyout,"char ");
+				allprint(yych);
+				putchar('\n');
+				}
+# endif
+			yyr = yyt;
+			if ( (int)yyt > (int)yycrank){
+				yyt = yyr + yych;
+				if (yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				}
+# ifdef YYOPTIM
+			else if((int)yyt < (int)yycrank) {		/* r < yycrank */
+				yyt = yyr = yycrank+(yycrank-yyt);
+# ifdef LEXDEBUG
+				if(debug)fprintf(yyout,"compressed state\n");
+# endif
+				yyt = yyt + yych;
+				if(yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transitions */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				yyt = yyr + YYU(yymatch[yych]);
+# ifdef LEXDEBUG
+				if(debug){
+					fprintf(yyout,"try fall back character ");
+					allprint(YYU(yymatch[yych]));
+					putchar('\n');
+					}
+# endif
+				if(yyt <= yytop && yyt->verify+yysvec == yystate){
+					if(yyt->advance+yysvec == YYLERR)	/* error transition */
+						{unput(*--yylastch);break;}
+					*lsp++ = yystate = yyt->advance+yysvec;
+					goto contin;
+					}
+				}
+			if ((yystate = yystate->yyother) && (yyt= yystate->yystoff) != yycrank){
+# ifdef LEXDEBUG
+				if(debug)fprintf(yyout,"fall back to state %d\n",yystate-yysvec-1);
+# endif
+				goto tryagain;
+				}
+# endif
+			else
+				{unput(*--yylastch);break;}
+		contin:
+# ifdef LEXDEBUG
+			if(debug){
+				fprintf(yyout,"state %d char ",yystate-yysvec-1);
+				allprint(yych);
+				putchar('\n');
+				}
+# endif
+			;
+			}
+# ifdef LEXDEBUG
+		if(debug){
+			fprintf(yyout,"stopped at %d with ",*(lsp-1)-yysvec-1);
+			allprint(yych);
+			putchar('\n');
+			}
+# endif
+		while (lsp-- > yylstate){
+			*yylastch-- = 0;
+			if (*lsp != 0 && (yyfnd= (*lsp)->yystops) && *yyfnd > 0){
+				yyolsp = lsp;
+				if(yyextra[*yyfnd]){		/* must backup */
+					while(yyback((*lsp)->yystops,-*yyfnd) != 1 && lsp > yylstate){
+						lsp--;
+						unput(*yylastch--);
+						}
+					}
+				yyprevious = YYU(*yylastch);
+				yylsp = lsp;
+				yyleng = yylastch-yytext+1;
+				yytext[yyleng] = 0;
+# ifdef LEXDEBUG
+				if(debug){
+					fprintf(yyout,"\nmatch ");
+					sprint(yytext);
+					fprintf(yyout," action %d\n",*yyfnd);
+					}
+# endif
+				return(*yyfnd++);
+				}
+			unput(*yylastch);
+			}
+		if (yytext[0] == 0  /* && feof(yyin) */)
+			{
+			yysptr=yysbuf;
+			return(0);
+			}
+		yyprevious = yytext[0] = input();
+		if (yyprevious>0)
+			output(yyprevious);
+		yylastch=yytext;
+# ifdef LEXDEBUG
+		if(debug)putchar('\n');
+# endif
+		}
+	}
+yyback(p, m)
+	int *p;
+{
+if (p==0) return(0);
+while (*p)
+	{
+	if (*p++ == m)
+		return(1);
+	}
+return(0);
+}
+	/* the following are only used in the lex library */
+yyinput(){
+	return(input());
+	}
+yyoutput(c)
+  int c; {
+	output(c);
+	}
+yyunput(c)
+   int c; {
+	unput(c);
+	}
--- a/lua.c
+++ b/lua.c
@@ -1,31 +1,54 @@
 /*
 ** lua.c
 ** Linguagem para Usuarios de Aplicacao
+** TeCGraf - PUC-Rio
+** 28 Apr 93
 */

-char *rcs_lua="$Id: $";
-
 #include <stdio.h>

 #include "lua.h"
 #include "lualib.h"


-void main (int argc, char *argv[])
+void test (void)
 {
- int i;
- iolib_open ();
- strlib_open ();
- mathlib_open ();
- if (argc < 2)
- {
-   char buffer[250];
-   while (gets(buffer) != 0)
-     lua_dostring(buffer);
- }
- else
-   for (i=1; i<argc; i++)
-    lua_dofile (argv[i]);
+  lua_pushobject(lua_getparam(1));
+  lua_call ("c", 1);
+}
+
+
+static void callfunc (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj)) lua_call(lua_getstring(obj),0);
+}
+
+static void execstr (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj)) lua_dostring(lua_getstring(obj));
+}
+
+void main (int argc, char *argv[])
+{
+ int i;
+ if (argc < 2)
+ {
+  puts ("usage: lua filename [functionnames]");
+  return;
+ }
+ lua_register ("callfunc", callfunc);
+ lua_register ("execstr", execstr);
+ lua_register ("test", test);
+ iolib_open ();
+ strlib_open ();
+ mathlib_open ();
+ lua_dofile (argv[1]);
+ for (i=2; i<argc; i++)
+ {
+  lua_call (argv[i],0);
+ }
 }


--- a/lua.h
+++ b/lua.h
@@ -2,7 +2,7 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: $
+** 19 May 93
 */


--- a/lua.lex
+++ b/lua.lex
@@ -1,85 +0,0 @@
-%{
-
-char *rcs_lualex = "$Id: $";
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y.tab.h"
-
-#undef input
-#undef unput
-
-static Input input;
-static Unput unput;
-
-void lua_setinput (Input fn)
-{
- input = fn;
-}
-
-void lua_setunput (Unput fn)
-{
- unput = fn;
-}
-
-char *lua_lasttext (void)
-{
- return yytext;
-}
-
-%}
-
-
-%%
-[ \t]*					;
-^"$debug"				{yylval.vInt = 1; return DEBUG;}
-^"$nodebug"				{yylval.vInt = 0; return DEBUG;}
-\n					lua_linenumber++;
-"--".*					;
-"local"					return LOCAL;
-"if"					return IF;
-"then"					return THEN;
-"else"					return ELSE;
-"elseif"				return ELSEIF;
-"while"					return WHILE;
-"do"					return DO;
-"repeat"				return REPEAT;
-"until"					return UNTIL;
-"function"				{
-                                         yylval.vWord = lua_nfile-1;
-                                         return FUNCTION;
-					}
-"end"					return END;
-"return" 				return RETURN;
-"local" 				return LOCAL;
-"nil"					return NIL;
-"and"					return AND;
-"or"					return OR;
-"not"					return NOT;
-"~="					return NE;
-"<="					return LE;
-">="					return GE;
-".."					return CONC;
-\"[^\"]*\" 			| 
-\'[^\']*\'			      {
-				       yylval.vWord = lua_findenclosedconstant (yytext);
-				       return STRING;
-				      }
-[0-9]+("."[0-9]*)?	|
-([0-9]+)?"."[0-9]+	|
-[0-9]+("."[0-9]*)?[dDeEgG][+-]?[0-9]+ |
-([0-9]+)?"."[0-9]+[dDeEgG][+-]?[0-9]+ {
-				        yylval.vFloat = atof(yytext);
-				        return NUMBER;
-				       }
-[a-zA-Z_][a-zA-Z0-9_]*  	       {
-					yylval.vWord = lua_findsymbol (yytext);
-					return NAME;
-				       }
-.					return  *yytext;
-
--- a/lua.stx
+++ b/lua.stx
@@ -1,954 +0,0 @@
-%{
-
-char *rcs_luastx = "$Id: lua.stx,v 2.4 1994/04/20 16:22:21 celes Exp celes $";
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "mm.h"
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "lua.h"
-
-#define LISTING 0
-
-#ifndef CODE_BLOCK
-#define CODE_BLOCK 256
-#endif
-static Long   maxcode;
-static Long   maxmain;
-static Long   maxcurr ;
-static Byte  *code = NULL;
-static Byte  *initcode;
-static Byte  *basepc;
-static Long   maincode;
-static Long   pc;
-
-#define MAXVAR 32
-static long    varbuffer[MAXVAR];    /* variables in an assignment list;
-				it's long to store negative Word values */
-static int     nvarbuffer=0;	     /* number of variables at a list */
-
-static Word    localvar[STACKGAP];   /* store local variable names */
-static int     nlocalvar=0;	     /* number of local variables */
-
-#define MAXFIELDS FIELDS_PER_FLUSH*2
-static Word    fields[MAXFIELDS];     /* fieldnames to be flushed */
-static int     nfields=0;
-static int     ntemp;		     /* number of temporary var into stack */
-static int     err;		     /* flag to indicate error */
-
-/* Internal functions */
-
-static void code_byte (Byte c)
-{
- if (pc>maxcurr-2)  /* 1 byte free to code HALT of main code */
- {
-  maxcurr *= 2;
-  basepc = (Byte *)realloc(basepc, maxcurr*sizeof(Byte));
-  if (basepc == NULL)
-  {
-   lua_error ("not enough memory");
-   err = 1;
-  }
- }
- basepc[pc++] = c;
-}
-
-static void code_word (Word n)
-{
- CodeWord code;
- code.w = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
-}
-
-static void code_float (float n)
-{
- CodeFloat code;
- code.f = n;
- code_byte(code.m.c1);
- code_byte(code.m.c2);
- code_byte(code.m.c3);
- code_byte(code.m.c4);
-}
-
-static void code_word_at (Byte *p, Word n)
-{
- CodeWord code;
- code.w = n;
- *p++ = code.m.c1;
- *p++ = code.m.c2;
-}
-
-static void push_field (Word name)
-{
-  if (nfields < STACKGAP-1)
-    fields[nfields++] = name;
-  else
-  {
-   lua_error ("too many fields in a constructor");
-   err = 1;
-  }
-}
-
-static void flush_record (int n)
-{
-  int i;
-  if (n == 0) return;
-  code_byte(STORERECORD);
-  code_byte(n);
-  for (i=0; i<n; i++)
-    code_word(fields[--nfields]);
-  ntemp -= n;
-}
-
-static void flush_list (int m, int n)
-{
-  if (n == 0) return;
-  if (m == 0)
-    code_byte(STORELIST0); 
-  else
-  {
-    code_byte(STORELIST);
-    code_byte(m);
-  }
-  code_byte(n);
-  ntemp-=n;
-}
-
-static void incr_ntemp (void)
-{
- if (ntemp+nlocalvar+MAXVAR+1 < STACKGAP)
-  ntemp++;
- else
- {
-  lua_error ("stack overflow");
-  err = 1;
- }
-}
-
-static void add_nlocalvar (int n)
-{
- if (ntemp+nlocalvar+MAXVAR+n < STACKGAP)
-  nlocalvar += n;
- else
- {
-  lua_error ("too many local variables or expression too complicate");
-  err = 1;
- }
-}
-
-static void incr_nvarbuffer (void)
-{
- if (nvarbuffer < MAXVAR-1)
-  nvarbuffer++;
- else
- {
-  lua_error ("variable buffer overflow");
-  err = 1;
- }
-}
-
-static void code_number (float f)
-{ 
-  Word i = (Word)f;
-  if (f == (float)i)  /* f has an (short) integer value */
-  {
-   if (i <= 2) code_byte(PUSH0 + i);
-   else if (i <= 255)
-   {
-    code_byte(PUSHBYTE);
-    code_byte(i);
-   }
-   else
-   {
-    code_byte(PUSHWORD);
-    code_word(i);
-   }
-  }
-  else
-  {
-   code_byte(PUSHFLOAT);
-   code_float(f);
-  }
-  incr_ntemp();
-}
-
-%}
-
-
-%union 
-{
- int   vInt;
- float vFloat;
- char *pChar;
- Word  vWord;
- Long  vLong;
- Byte *pByte;
-}
-
-%start functionlist
-
-%token WRONGTOKEN
-%token NIL
-%token IF THEN ELSE ELSEIF WHILE DO REPEAT UNTIL END
-%token RETURN
-%token LOCAL
-%token <vFloat> NUMBER
-%token <vWord>  FUNCTION STRING
-%token <pChar>   NAME 
-%token <vInt>   DEBUG
-
-%type <vLong> PrepJump
-%type <vInt>  expr, exprlist, exprlist1, varlist1, typeconstructor
-%type <vInt>  fieldlist, localdeclist
-%type <vInt>  ffieldlist, ffieldlist1
-%type <vInt>  lfieldlist, lfieldlist1
-%type <vLong> var, objectname
-
-
-%left AND OR
-%left '=' NE '>' '<' LE GE
-%left CONC
-%left '+' '-'
-%left '*' '/'
-%left UNARY NOT
-
-
-%% /* beginning of rules section */
-
-
-functionlist : /* empty */
-	     | functionlist 
-	        {
-	  	  pc=maincode; basepc=initcode; maxcurr=maxmain;
-		  nlocalvar=0;
-	        }
-	       stat sc 
-		{
-		  maincode=pc; initcode=basepc; maxmain=maxcurr;
-		}
-	     | functionlist function
-	     | functionlist setdebug
-	     ;
-	     
-function     : FUNCTION NAME 
-	       {
-		if (code == NULL)	/* first function */
-		{
-		 code = (Byte *) calloc(CODE_BLOCK, sizeof(Byte));
-		 if (code == NULL)
-		 {
-		  lua_error("not enough memory");
-		  err = 1;
-		 }
-		 maxcode = CODE_BLOCK;
-		}
-		pc=0; basepc=code; maxcurr=maxcode; 
-		nlocalvar=0;
-		$<vWord>$ = lua_findsymbol($2); 
-	       }
-	       '(' parlist ')' 
-	       {
-	        if (lua_debug)
-		{
-	         code_byte(SETFUNCTION); 
-                 code_word(lua_nfile-1);
-		 code_word($<vWord>3);
-		}
-	        lua_codeadjust (0);
-	       }
-               block
-               END 	 
-	       { 
-                if (lua_debug) code_byte(RESET); 
-	        code_byte(RETCODE); code_byte(nlocalvar);
-	        s_tag($<vWord>3) = T_FUNCTION;
-	        s_bvalue($<vWord>3) = calloc (pc, sizeof(Byte));
-		if (s_bvalue($<vWord>3) == NULL)
-		{
-		 lua_error("not enough memory");
-		 err = 1;
-		}
-	        memcpy (s_bvalue($<vWord>3), basepc, pc*sizeof(Byte));
-		code = basepc; maxcode=maxcurr;
-#if LISTING
-PrintCode(code,code+pc);
-#endif
-	       }
-	       ;
-
-statlist : /* empty */
-	 | statlist stat sc
-	 ;
-
-stat	 : {
-            ntemp = 0; 
-            if (lua_debug)
-            {
-             code_byte(SETLINE); code_word(lua_linenumber);
-            }
-	   }
-	   stat1
-		
-sc	 : /* empty */ | ';' ;
-
-
-stat1  : IF expr1 THEN PrepJump block PrepJump elsepart END
-       {
-        {
-	 Long elseinit = $6+sizeof(Word)+1;
-	 if (pc - elseinit == 0)		/* no else */
-	 {
-	  pc -= sizeof(Word)+1;
-	  elseinit = pc;
-	 }
-	 else
-	 {
-	  basepc[$6] = JMP;
-	  code_word_at(basepc+$6+1, pc - elseinit);
-	 }
-	 basepc[$4] = IFFJMP;
-	 code_word_at(basepc+$4+1,elseinit-($4+sizeof(Word)+1));
-	}
-       }
-     
-       | WHILE {$<vLong>$=pc;} expr1 DO PrepJump block PrepJump END
-     	
-       {
-        basepc[$5] = IFFJMP;
-	code_word_at(basepc+$5+1, pc - ($5 + sizeof(Word)+1));
-        
-        basepc[$7] = UPJMP;
-	code_word_at(basepc+$7+1, pc - ($<vLong>2));
-       }
-     
-       | REPEAT {$<vLong>$=pc;} block UNTIL expr1 PrepJump
-     	
-       {
-        basepc[$6] = IFFUPJMP;
-	code_word_at(basepc+$6+1, pc - ($<vLong>2));
-       }
-
-
-       | varlist1 '=' exprlist1
-       {
-        {
-         int i;
-         if ($3 == 0 || nvarbuffer != ntemp - $1 * 2)
-	  lua_codeadjust ($1 * 2 + nvarbuffer);
-	 for (i=nvarbuffer-1; i>=0; i--)
-	  lua_codestore (i);
-	 if ($1 > 1 || ($1 == 1 && varbuffer[0] != 0))
-	  lua_codeadjust (0);
-	}
-       } 
-       | functioncall			{ lua_codeadjust (0); }
-       | typeconstructor                { lua_codeadjust (0); }
-       | LOCAL localdeclist decinit   { add_nlocalvar($2); lua_codeadjust (0); }
-       ;
-
-elsepart : /* empty */
-	 | ELSE block
-         | ELSEIF expr1 THEN PrepJump block PrepJump elsepart
-         {
-          {
-  	   Long elseinit = $6+sizeof(Word)+1;
-  	   if (pc - elseinit == 0)		/* no else */
-  	   {
-  	    pc -= sizeof(Word)+1;
-	    elseinit = pc;
-	   }
-	   else
-	   {
-	    basepc[$6] = JMP;
-	    code_word_at(basepc+$6+1, pc - elseinit);
-	   }
-	   basepc[$4] = IFFJMP;
-	   code_word_at(basepc+$4+1, elseinit - ($4 + sizeof(Word)+1));
-	  }  
-         }   
-         ;
-     
-block    : {$<vInt>$ = nlocalvar;} statlist {ntemp = 0;} ret 
-         {
-	  if (nlocalvar != $<vInt>1)
-	  {
-           nlocalvar = $<vInt>1;
-	   lua_codeadjust (0);
-	  }
-         }
-         ;
-
-ret	: /* empty */
-        | { if (lua_debug){code_byte(SETLINE);code_word(lua_linenumber);}}
-          RETURN  exprlist sc 	
-          { 
-           if (lua_debug) code_byte(RESET); 
-           code_byte(RETCODE); code_byte(nlocalvar);
-          }
-	;
-
-PrepJump : /* empty */
-	 { 
-	  $$ = pc;
-	  code_byte(0);		/* open space */
-	  code_word (0);
-         }
-	   
-expr1	 : expr { if ($1 == 0) {lua_codeadjust (ntemp+1); incr_ntemp();}}
-	 ;
-				
-expr :	'(' expr ')'    { $$ = $2; }
-     |	expr1 '=' expr1	{ code_byte(EQOP);   $$ = 1; ntemp--;}
-     |	expr1 '<' expr1	{ code_byte(LTOP);   $$ = 1; ntemp--;}
-     |	expr1 '>' expr1	{ code_byte(LEOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 NE  expr1	{ code_byte(EQOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 LE  expr1	{ code_byte(LEOP);   $$ = 1; ntemp--;}
-     |	expr1 GE  expr1	{ code_byte(LTOP); code_byte(NOTOP); $$ = 1; ntemp--;}
-     |	expr1 '+' expr1 { code_byte(ADDOP);  $$ = 1; ntemp--;}
-     |	expr1 '-' expr1 { code_byte(SUBOP);  $$ = 1; ntemp--;}
-     |	expr1 '*' expr1 { code_byte(MULTOP); $$ = 1; ntemp--;}
-     |	expr1 '/' expr1 { code_byte(DIVOP);  $$ = 1; ntemp--;}
-     |	expr1 CONC expr1 { code_byte(CONCOP);  $$ = 1; ntemp--;}
-     |	'+' expr1 %prec UNARY	{ $$ = 1; }
-     |	'-' expr1 %prec UNARY	{ code_byte(MINUSOP); $$ = 1;}
-     | typeconstructor { $$ = $1; }
-     |  '@' '(' dimension ')'
-     { 
-      code_byte(CREATEARRAY);
-      $$ = 1;
-     }
-     |	var             { lua_pushvar ($1); $$ = 1;}
-     |	NUMBER          { code_number($1); $$ = 1; }
-     |	STRING
-     {
-      code_byte(PUSHSTRING);
-      code_word($1);
-      $$ = 1;
-      incr_ntemp();
-     }
-     |	NIL		{code_byte(PUSHNIL); $$ = 1; incr_ntemp();}
-     |	functioncall
-     {
-      $$ = 0;
-      if (lua_debug)
-      {
-       code_byte(SETLINE); code_word(lua_linenumber);
-      }
-     }
-     |	NOT expr1	{ code_byte(NOTOP);  $$ = 1;}
-     |	expr1 AND PrepJump {code_byte(POP); ntemp--;} expr1
-     { 
-      basepc[$3] = ONFJMP;
-      code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
-      $$ = 1;
-     }
-     |	expr1 OR PrepJump {code_byte(POP); ntemp--;} expr1	
-     { 
-      basepc[$3] = ONTJMP;
-      code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
-      $$ = 1;
-     }
-     ;
-
-typeconstructor: '@'  
-     {
-      code_byte(PUSHBYTE);
-      $<vLong>$ = pc; code_byte(0);
-      incr_ntemp();
-      code_byte(CREATEARRAY);
-     }
-      objectname fieldlist 
-     {
-      basepc[$<vLong>2] = $4; 
-      if ($3 < 0)	/* there is no function to be called */
-      {
-       $$ = 1;
-      }
-      else
-      {
-       lua_pushvar ($3+1);
-       code_byte(PUSHMARK);
-       incr_ntemp();
-       code_byte(PUSHOBJECT);
-       incr_ntemp();
-       code_byte(CALLFUNC); 
-       ntemp -= 4;
-       $$ = 0;
-       if (lua_debug)
-       {
-        code_byte(SETLINE); code_word(lua_linenumber);
-       }
-      }
-     }
-         ;
-
-dimension    : /* empty */	{ code_byte(PUSHNIL); incr_ntemp();}
-	     | expr1
-	     ;
-	     
-functioncall : functionvalue  {code_byte(PUSHMARK); $<vInt>$ = ntemp; incr_ntemp();}
-                '(' exprlist ')' { code_byte(CALLFUNC); ntemp = $<vInt>2-1;}
-
-functionvalue : var {lua_pushvar ($1); } 
-	      ;
-		
-exprlist  :	/* empty */		{ $$ = 1; }
-	  |	exprlist1		{ $$ = $1; }
-	  ;
-		
-exprlist1 :	expr			{ $$ = $1; }
-	  |	exprlist1 ',' {if (!$1){lua_codeadjust (ntemp+1); incr_ntemp();}} 
-                 expr {$$ = $4;}
-	  ;
-
-parlist  :	/* empty */
-	  |	parlist1
-	  ;
-		
-parlist1 :	NAME		  
-		{
-		 localvar[nlocalvar]=lua_findsymbol($1); 
-		 add_nlocalvar(1);
-		}
-	  |	parlist1 ',' NAME 
-		{
-		 localvar[nlocalvar]=lua_findsymbol($3); 
-		 add_nlocalvar(1);
-		}
-	  ;
-		
-objectname :	/* empty */ 	{$$=-1;}
-	   |	NAME		{$$=lua_findsymbol($1);}
-	   ;
-	   
-fieldlist  : '{' ffieldlist '}'  
-	      { 
-	       flush_record($2%FIELDS_PER_FLUSH); 
-	       $$ = $2;
-	      }
-           | '[' lfieldlist ']'  
-	      { 
-	       flush_list($2/FIELDS_PER_FLUSH, $2%FIELDS_PER_FLUSH);
-	       $$ = $2;
-     	      }
-	   ;
-
-ffieldlist : /* empty */   { $$ = 0; }
-           | ffieldlist1   { $$ = $1; }
-           ;
-
-ffieldlist1 : ffield			{$$=1;}
-	   | ffieldlist1 ',' ffield	
-		{
-		  $$=$1+1;
-		  if ($$%FIELDS_PER_FLUSH == 0) flush_record(FIELDS_PER_FLUSH);
-		}
-	   ; 
-
-ffield      : NAME {$<vWord>$ = lua_findconstant($1);} '=' expr1 
-	      { 
-	       push_field($<vWord>2);
-	      }
-           ;
-
-lfieldlist : /* empty */   { $$ = 0; }
-           | lfieldlist1   { $$ = $1; }
-           ;
-
-lfieldlist1 : expr1  {$$=1;}
-	    | lfieldlist1 ',' expr1
-		{
-		  $$=$1+1;
-		  if ($$%FIELDS_PER_FLUSH == 0) 
-		    flush_list($$/FIELDS_PER_FLUSH - 1, FIELDS_PER_FLUSH);
-		}
-            ;
-
-varlist1  :	var			
-	  {
-	   nvarbuffer = 0; 
-           varbuffer[nvarbuffer] = $1; incr_nvarbuffer();
-	   $$ = ($1 == 0) ? 1 : 0;
-	  }
-	  |	varlist1 ',' var	
-	  { 
-           varbuffer[nvarbuffer] = $3; incr_nvarbuffer();
-	   $$ = ($3 == 0) ? $1 + 1 : $1;
-	  }
-	  ;
-		
-var	  :	NAME
-	  {
-	   Word s = lua_findsymbol($1);
-	   int local = lua_localname (s);
-	   if (local == -1)	/* global var */
-	    $$ = s + 1;		/* return positive value */
-           else
-	    $$ = -(local+1);		/* return negative value */
-	  }
-	  
-	  |	var {lua_pushvar ($1);} '[' expr1 ']' 
-	  {
-	   $$ = 0;		/* indexed variable */
-	  }
-	  |	var {lua_pushvar ($1);} '.' NAME
-	  {
-	   code_byte(PUSHSTRING);
-	   code_word(lua_findconstant($4)); incr_ntemp();
-	   $$ = 0;		/* indexed variable */
-	  }
-	  ;
-		
-localdeclist  : NAME {localvar[nlocalvar]=lua_findsymbol($1); $$ = 1;}
-     	  | localdeclist ',' NAME 
-	    {
-	     localvar[nlocalvar+$1]=lua_findsymbol($3); 
-	     $$ = $1+1;
-	    }
-	  ;
-		
-decinit	  : /* empty */
-	  | '=' exprlist1
-	  ;
-	  
-setdebug  : DEBUG {lua_debug = $1;}
-
-%%
-
-/*
-** Search a local name and if find return its index. If do not find return -1
-*/
-static int lua_localname (Word n)
-{
- int i;
- for (i=nlocalvar-1; i >= 0; i--)
-  if (n == localvar[i]) return i;	/* local var */
- return -1;		        /* global var */
-}
-
-/*
-** Push a variable given a number. If number is positive, push global variable
-** indexed by (number -1). If negative, push local indexed by ABS(number)-1.
-** Otherwise, if zero, push indexed variable (record).
-*/
-static void lua_pushvar (long number)
-{ 
- if (number > 0)	/* global var */
- {
-  code_byte(PUSHGLOBAL);
-  code_word(number-1);
-  incr_ntemp();
- }
- else if (number < 0)	/* local var */
- {
-  number = (-number) - 1;
-  if (number < 10) code_byte(PUSHLOCAL0 + number);
-  else
-  {
-   code_byte(PUSHLOCAL);
-   code_byte(number);
-  }
-  incr_ntemp();
- }
- else
- {
-  code_byte(PUSHINDEXED);
-  ntemp--;
- }
-}
-
-static void lua_codeadjust (int n)
-{
- code_byte(ADJUST);
- code_byte(n + nlocalvar);
-}
-
-static void lua_codestore (int i)
-{
- if (varbuffer[i] > 0)		/* global var */
- {
-  code_byte(STOREGLOBAL);
-  code_word(varbuffer[i]-1);
- }
- else if (varbuffer[i] < 0)      /* local var */
- {
-  int number = (-varbuffer[i]) - 1;
-  if (number < 10) code_byte(STORELOCAL0 + number);
-  else
-  {
-   code_byte(STORELOCAL);
-   code_byte(number);
-  }
- }
- else				  /* indexed var */
- {
-  int j;
-  int upper=0;     	/* number of indexed variables upper */
-  int param;		/* number of itens until indexed expression */
-  for (j=i+1; j <nvarbuffer; j++)
-   if (varbuffer[j] == 0) upper++;
-  param = upper*2 + i;
-  if (param == 0)
-   code_byte(STOREINDEXED0);
-  else
-  {
-   code_byte(STOREINDEXED);
-   code_byte(param);
-  }
- }
-}
-
-void yyerror (char *s)
-{
- static char msg[256];
- sprintf (msg,"%s near \"%s\" at line %d in file \"%s\"",
-          s, lua_lasttext (), lua_linenumber, lua_filename());
- lua_error (msg);
- err = 1;
-}
-
-int yywrap (void)
-{
- return 1;
-}
-
-
-/*
-** Parse LUA code and execute global statement.
-** Return 0 on success or 1 on error.
-*/
-int lua_parse (void)
-{
- Byte *init = initcode = (Byte *) calloc(CODE_BLOCK, sizeof(Byte));
- maincode = 0; 
- maxmain = CODE_BLOCK;
- if (init == NULL)
- {
-  lua_error("not enough memory");
-  return 1;
- }
- err = 0;
- if (yyparse () || (err==1)) return 1;
- initcode[maincode++] = HALT;
- init = initcode;
-#if LISTING
- PrintCode(init,init+maincode);
-#endif
- if (lua_execute (init)) return 1;
- free(init);
- return 0;
-}
-
-
-#if LISTING
-
-static void PrintCode (Byte *code, Byte *end)
-{
- Byte *p = code;
- printf ("\n\nCODE\n");
- while (p != end)
- {
-  switch ((OpCode)*p)
-  {
-   case PUSHNIL:	printf ("%d    PUSHNIL\n", (p++)-code); break;
-   case PUSH0: case PUSH1: case PUSH2:
-    			printf ("%d    PUSH%c\n", p-code, *p-PUSH0+'0');
-    			p++;
-   			break;
-   case PUSHBYTE:
-    			printf ("%d    PUSHBYTE   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case PUSHWORD:
-                        {
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHWORD   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHFLOAT:
-			{
-			 CodeFloat c;
-			 int n = p-code;
-			 p++;
-			 get_float(c,p);
-    			 printf ("%d    PUSHFLOAT  %f\n", n, c.f);
-			}
-   			break;
-   case PUSHSTRING:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHSTRING   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
-   case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
-   case PUSHLOCAL8: case PUSHLOCAL9:
-    			printf ("%d    PUSHLOCAL%c\n", p-code, *p-PUSHLOCAL0+'0');
-    			p++;
-   			break;
-   case PUSHLOCAL:	printf ("%d    PUSHLOCAL   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case PUSHGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    PUSHGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case PUSHINDEXED:    printf ("%d    PUSHINDEXED\n", (p++)-code); break;
-   case PUSHMARK:       printf ("%d    PUSHMARK\n", (p++)-code); break;
-   case PUSHOBJECT:     printf ("%d    PUSHOBJECT\n", (p++)-code); break;
-   case STORELOCAL0: case STORELOCAL1: case STORELOCAL2: case STORELOCAL3:
-   case STORELOCAL4: case STORELOCAL5: case STORELOCAL6: case STORELOCAL7:
-   case STORELOCAL8: case STORELOCAL9:
-    			printf ("%d    STORELOCAL%c\n", p-code, *p-STORELOCAL0+'0');
-    			p++;
-   			break;
-   case STORELOCAL:
-    			printf ("%d    STORELOCAL   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case STOREGLOBAL:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    STOREGLOBAL   %d\n", n, c.w);
-			}
-   			break;
-   case STOREINDEXED0:  printf ("%d    STOREINDEXED0\n", (p++)-code); break;
-   case STOREINDEXED:   printf ("%d    STOREINDEXED   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case STORELIST0:
-	printf("%d      STORELIST0  %d\n", p-code, *(++p));
-        p++;
-        break;
-   case STORELIST:
-	printf("%d      STORELIST  %d %d\n", p-code, *(p+1), *(p+2));
-        p+=3;
-        break;
-   case STORERECORD:
-       printf("%d      STORERECORD  %d\n", p-code, *(++p));
-       p += *p*sizeof(Word) + 1;
-       break;
-   case ADJUST:
-    			printf ("%d    ADJUST   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case CREATEARRAY:	printf ("%d    CREATEARRAY\n", (p++)-code); break;
-   case EQOP:       	printf ("%d    EQOP\n", (p++)-code); break;
-   case LTOP:       	printf ("%d    LTOP\n", (p++)-code); break;
-   case LEOP:       	printf ("%d    LEOP\n", (p++)-code); break;
-   case ADDOP:       	printf ("%d    ADDOP\n", (p++)-code); break;
-   case SUBOP:       	printf ("%d    SUBOP\n", (p++)-code); break;
-   case MULTOP:      	printf ("%d    MULTOP\n", (p++)-code); break;
-   case DIVOP:       	printf ("%d    DIVOP\n", (p++)-code); break;
-   case CONCOP:       	printf ("%d    CONCOP\n", (p++)-code); break;
-   case MINUSOP:       	printf ("%d    MINUSOP\n", (p++)-code); break;
-   case NOTOP:       	printf ("%d    NOTOP\n", (p++)-code); break;
-   case ONTJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONTJMP  %d\n", n, c.w);
-			}
-   			break;
-   case ONFJMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    ONFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case JMP:	   
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    JMP  %d\n", n, c.w);
-			}
-   			break;
-   case UPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    UPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFJMP  %d\n", n, c.w);
-			}
-   			break;
-   case IFFUPJMP:
-    			{
-			 CodeWord c;
-			 int n = p-code;
-			 p++;
-			 get_word(c,p);
-    			 printf ("%d    IFFUPJMP  %d\n", n, c.w);
-			}
-   			break;
-   case POP:       	printf ("%d    POP\n", (p++)-code); break;
-   case CALLFUNC:	printf ("%d    CALLFUNC\n", (p++)-code); break;
-   case RETCODE:
-    			printf ("%d    RETCODE   %d\n", p-code, *(++p));
-    			p++;
-   			break;
-   case HALT:		printf ("%d    HALT\n", (p++)-code); break;
-   case SETFUNCTION:
-                        {
-                         CodeWord c1, c2;
-                         int n = p-code;
-                         p++;
-                         get_word(c1,p);
-                         get_word(c2,p);
-                         printf ("%d    SETFUNCTION  %d  %d\n", n, c1.w, c2.w);
-                        }
-                        break;
-   case SETLINE:
-                        {
-                         CodeWord c;
-                         int n = p-code;
-                         p++;
-                         get_word(c,p);
-                         printf ("%d    SETLINE  %d\n", n, c.w);
-                        }
-                        break;
-
-   case RESET:		printf ("%d    RESET\n", (p++)-code); break;
-   default:		printf ("%d    Cannot happen: code %d\n", (p++)-code, *(p-1)); break;
-  }
- }
-}
-#endif
-
--- a/lualib.h
+++ b/lualib.h
@@ -1,8 +1,8 @@
 /*
-** Libraries to be used in LUA programs
+** Libraries to use in LUA programs
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: $
+** 19 May 93
 */

 #ifndef lualib_h
@@ -13,4 +13,3 @@ void strlib_open  (void);
 void mathlib_open (void);

 #endif
-
--- a/53
+++ b/53
@@ -1,53 +0,0 @@
-# $Id: makefile,v 1.5 1994/01/10 19:49:56 roberto Exp celes $
-# Compilation parameters
-CC = gcc
-CFLAGS = -I/usr/5include -Wall -O2
-
-AR = ar
-ARFLAGS	= rvl
-
-# Aplication modules
-LUAMOD =	\
-	y.tab 	\
-	lex	\
-	opcode	\
-	hash	\
-	table	\
-	inout	\
-	tree
-
-LIBMOD = 	\
-	iolib	\
-	strlib	\
-	mathlib
-
-LUAOBJS	= $(LUAMOD:%=%.o)
-
-LIBOBJS	= $(LIBMOD:%=%.o)
-
-lua : lua.o lua.a lualib.a
-	$(CC) $(CFLAGS) -o $@ lua.c lua.a lualib.a -lm
-
-lua.a : y.tab.c $(LUAOBJS)
-	$(AR) $(ARFLAGS) $@  $?
-	ranlib lua.a
-
-lualib.a : $(LIBOBJS)
-	$(AR) $(ARFLAGS) $@  $?
-	ranlib $@
-
-.KEEP_STATE:
-
-liblua.so.1.0 : lua.o
-	ld -o liblua.so.1.0 $(LUAOBJS)
-
-%.o	: %.c
-	$(CC) $(CFLAGS) -c -o $@ $<
-
-
-y.tab.c : lua.stx exscript
-	yacc -d lua.stx ; ex y.tab.c <exscript
-
-% : RCS/%,v
-	co $@
-
--- a/mathlib.c
+++ b/mathlib.c
@@ -1,18 +1,17 @@
 /*
 ** mathlib.c
-** Mathematics library to LUA
+** Mathematica library to LUA
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 19 May 93
 */

-char *rcs_mathlib="$Id: $";
-
 #include <stdio.h>		/* NULL */
 #include <math.h>

 #include "lua.h"

-#define TODEGREE(a) ((a)*180.0/3.14159)
-#define TORAD(a)    ((a)*3.14159/180.0)
-
 static void math_abs (void)
 {
 double d;
@@ -36,7 +35,7 @@ static void math_sin (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `sin'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (sin(TORAD(d)));
+ lua_pushnumber (sin(d));
 }


@@ -50,7 +49,7 @@ static void math_cos (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `cos'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (cos(TORAD(d)));
+ lua_pushnumber (cos(d));
 }


@@ -64,7 +63,7 @@ static void math_tan (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `tan'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (tan(TORAD(d)));
+ lua_pushnumber (tan(d));
 }


@@ -77,7 +76,7 @@ static void math_asin (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `asin'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(asin(d)));
+ lua_pushnumber (asin(d));
 }


@@ -90,7 +89,7 @@ static void math_acos (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `acos'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(acos(d)));
+ lua_pushnumber (acos(d));
 }


@@ -104,7 +103,7 @@ static void math_atan (void)
 if (!lua_isnumber(o))
 { lua_error ("incorrect arguments to function `atan'"); return; }
 d = lua_getnumber(o);
- lua_pushnumber (TODEGREE(atan(d)));
+ lua_pushnumber (atan(d));
 }


--- a/mathlib.h
+++ b/mathlib.h
@@ -1,13 +0,0 @@
-/*
-** Math library to LUA
-** TeCGraf - PUC-Rio
-** $Id: $
-*/
-
-
-#ifndef strlib_h
-
-void mathlib_open (void);
-
-#endif
-
--- a/mm.h
+++ b/mm.h
@@ -1,39 +0,0 @@
-/*
-** mm.h
-** Waldemar Celes Filho
-** Sep 16, 1992
-*/
-
-
-#ifndef mm_h
-#define mm_h
-
-#include <stdlib.h>
-
-#ifdef _MM_
-
-/* switch off the debugger functions */
-#define malloc(s)	MmMalloc(s,__FILE__,__LINE__)
-#define calloc(n,s)	MmCalloc(n,s,__FILE__,__LINE__)
-#define realloc(a,s)	MmRealloc(a,s,__FILE__,__LINE__,#a)
-#define free(a)		MmFree(a,__FILE__,__LINE__,#a)
-#define strdup(s)	MmStrdup(s,__FILE__,__LINE__)
-#endif
-
-typedef void (*Ferror) (char *);
-
-/* Exported functions */
-void  MmInit (Ferror f, Ferror w);
-void *MmMalloc (unsigned size, char *file, int line);
-void *MmCalloc (unsigned n, unsigned size, char *file, int line);
-void  MmFree (void *a, char *file, int line, char *var);
-void *MmRealloc (void *old, unsigned size, char *file, int line, char *var);
-char *MmStrdup (char *s, char *file, int line);
-unsigned MmGetBytes (void);
-void MmListAllocated (void);
-void MmCheck (void);
-void MmStatistics (void);
-
-
-#endif
-
--- a/opcode.c
+++ b/opcode.c
@@ -1,10 +1,9 @@
 /*
 ** opcode.c
 ** TecCGraf - PUC-Rio
+** 26 Apr 93
 */

-char *rcs_opcode="$Id: opcode.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -12,8 +11,6 @@ char *rcs_opcode="$Id: opcode.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
 #include <floatingpoint.h>
 #endif

-#include "mm.h"
-
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
@@ -23,55 +20,11 @@ char *rcs_opcode="$Id: opcode.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
 #define tonumber(o) ((tag(o) != T_NUMBER) && (lua_tonumber(o) != 0))
 #define tostring(o) ((tag(o) != T_STRING) && (lua_tostring(o) != 0))

-
-#define STACK_BUFFER (STACKGAP+128)
-
-static Word    maxstack;
-static Object *stack=NULL;
-static Object *top, *base;
-
-
-/*
-** Init stack
-*/
-static int lua_initstack (void)
-{
- maxstack = STACK_BUFFER;
- stack = (Object *)calloc(maxstack, sizeof(Object));
- if (stack == NULL)
- {
-  lua_error("stack - not enough memory");
-  return 1;
- }
- tag(stack) = T_MARK;
- top = base = stack+1;
- return 0;
-}
-
-
-/*
-** Check stack overflow and, if necessary, realloc vector
-*/
-static int lua_checkstack (Word n)
-{
- if (stack == NULL)
-  return lua_initstack();
- if (n > maxstack)
- {
-  Word t = top-stack;
-  Word b = base-stack;
-  maxstack *= 2;
-  stack = (Object *)realloc(stack, maxstack*sizeof(Object));
-  if (stack == NULL)
-  {
-   lua_error("stack - not enough memory");
-   return 1;
-  }
-  top = stack + t;
-  base = stack + b;
- }
- return 0;
-}
+#ifndef MAXSTACK
+#define MAXSTACK 256
+#endif
+static Object stack[MAXSTACK] = {{T_MARK, {NULL}}};
+static Object *top=stack+1, *base=stack+1;


 /*
@@ -80,14 +33,30 @@ static int lua_checkstack (Word n)
 */
 static char *lua_strconc (char *l, char *r)
 {
- static char buffer[1024];
- int n = strlen(l)+strlen(r)+1;
- if (n > 1024)
+ char *s = calloc (strlen(l)+strlen(r)+2, sizeof(char));
+ if (s == NULL)
 {
-  lua_error ("string too large");
+  lua_error ("not enough memory");
  return NULL;
 }
- return strcat(strcpy(buffer,l),r);
+ *s++ = 0; 			/* create mark space */
+ return strcat(strcpy(s,l),r);
+}
+
+/*
+** Duplicate a string,  creating a mark space at the beginning.
+** Return the new string pointer.
+*/
+char *lua_strdup (char *l)
+{
+ char *s = calloc (strlen(l)+2, sizeof(char));
+ if (s == NULL)
+ {
+  lua_error ("not enough memory");
+  return NULL;
+ }
+ *s++ = 0; 			/* create mark space */
+ return strcpy(s,l);
 }

 /*
@@ -155,7 +124,7 @@ static int lua_tostring (Object *obj)
  sprintf (s, "%d", (int) nvalue(obj));
 else
  sprintf (s, "%g", nvalue(obj));
- svalue(obj) = lua_createstring(s);
+ svalue(obj) = lua_createstring(lua_strdup(s));
 if (svalue(obj) == NULL)
  return 1;
 tag(obj) = T_STRING;
@@ -168,18 +137,12 @@ static int lua_tostring (Object *obj)
 */
 int lua_execute (Byte *pc)
 {
- Word oldbase;
-
- if (stack == NULL)
-  lua_initstack();
-
- oldbase = base-stack;
- base = top;
 while (1)
 {
-  OpCode opcode;
-  switch (opcode = (OpCode)*pc++)
+  switch ((OpCode)*pc++)
  {
+   case NOP: break;
+   
   case PUSHNIL: tag(top++) = T_NIL; break;
   
   case PUSH0: tag(top) = T_NUMBER; nvalue(top++) = 0; break;
@@ -189,42 +152,35 @@ int lua_execute (Byte *pc)
   case PUSHBYTE: tag(top) = T_NUMBER; nvalue(top++) = *pc++; break;
   
   case PUSHWORD: 
-   {
-    CodeWord code;
-    get_word(code,pc);
-    tag(top) = T_NUMBER; nvalue(top++) = code.w;
-   }
+    tag(top) = T_NUMBER; nvalue(top++) = *((Word *)(pc)); pc += sizeof(Word);
   break;
   
   case PUSHFLOAT:
-   {
-    CodeFloat code;
-    get_float(code,pc);
-    tag(top) = T_NUMBER; nvalue(top++) = code.f;
-   }
+    tag(top) = T_NUMBER; nvalue(top++) = *((float *)(pc)); pc += sizeof(float);
   break;
-
   case PUSHSTRING:
   {
-    CodeWord code;
-    get_word(code,pc);
-    tag(top) = T_STRING; svalue(top++) = lua_constant[code.w];
+    int w = *((Word *)(pc));
+    pc += sizeof(Word);
+    tag(top) = T_STRING; svalue(top++) = lua_constant[w];
   }
   break;
   
-   case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2:
-   case PUSHLOCAL3: case PUSHLOCAL4: case PUSHLOCAL5:
-   case PUSHLOCAL6: case PUSHLOCAL7: case PUSHLOCAL8:
-   case PUSHLOCAL9: *top++ = *(base + (int)(opcode-PUSHLOCAL0)); break;
+   case PUSHLOCAL0: *top++ = *(base + 0); break;
+   case PUSHLOCAL1: *top++ = *(base + 1); break;
+   case PUSHLOCAL2: *top++ = *(base + 2); break;
+   case PUSHLOCAL3: *top++ = *(base + 3); break;
+   case PUSHLOCAL4: *top++ = *(base + 4); break;
+   case PUSHLOCAL5: *top++ = *(base + 5); break;
+   case PUSHLOCAL6: *top++ = *(base + 6); break;
+   case PUSHLOCAL7: *top++ = *(base + 7); break;
+   case PUSHLOCAL8: *top++ = *(base + 8); break;
+   case PUSHLOCAL9: *top++ = *(base + 9); break;
   
   case PUSHLOCAL: *top++ = *(base + (*pc++)); break;
   
   case PUSHGLOBAL: 
-   {
-    CodeWord code;
-    get_word(code,pc);
-    *top++ = s_object(code.w);
-   }
+    *top++ = s_object(*((Word *)(pc))); pc += sizeof(Word);
   break;
   
   case PUSHINDEXED:
@@ -245,19 +201,21 @@ int lua_execute (Byte *pc)
   
   case PUSHOBJECT: *top = *(top-3); top++; break;
   
-   case STORELOCAL0: case STORELOCAL1: case STORELOCAL2:
-   case STORELOCAL3: case STORELOCAL4: case STORELOCAL5:
-   case STORELOCAL6: case STORELOCAL7: case STORELOCAL8:
-   case STORELOCAL9: *(base + (int)(opcode-STORELOCAL0)) = *(--top); break;
+   case STORELOCAL0: *(base + 0) = *(--top); break;
+   case STORELOCAL1: *(base + 1) = *(--top); break;
+   case STORELOCAL2: *(base + 2) = *(--top); break;
+   case STORELOCAL3: *(base + 3) = *(--top); break;
+   case STORELOCAL4: *(base + 4) = *(--top); break;
+   case STORELOCAL5: *(base + 5) = *(--top); break;
+   case STORELOCAL6: *(base + 6) = *(--top); break;
+   case STORELOCAL7: *(base + 7) = *(--top); break;
+   case STORELOCAL8: *(base + 8) = *(--top); break;
+   case STORELOCAL9: *(base + 9) = *(--top); break;
    
   case STORELOCAL: *(base + (*pc++)) = *(--top); break;
   
   case STOREGLOBAL:
-   {
-    CodeWord code;
-    get_word(code,pc);
-    s_object(code.w) = *(--top);
-   }
+    s_object(*((Word *)(pc))) = *(--top); pc += sizeof(Word);
   break;

   case STOREINDEXED0:
@@ -287,60 +245,28 @@ int lua_execute (Byte *pc)
     if (h == NULL) return 1;
     *h = *(top-1);
    }
-    top--;
+    --top;
   }
   break;
   
-   case STORELIST0:
-   case STORELIST:
-   {
-    int m, n;
-    Object *arr;
-    if (opcode == STORELIST0) m = 0;
-    else m = *(pc++) * FIELDS_PER_FLUSH;
-    n = *(pc++);
-    arr = top-n-1;
-    if (tag(arr) != T_ARRAY)
+   case STOREFIELD:
+    if (tag(top-3) != T_ARRAY)
    {
-     lua_reportbug ("internal error - table expected");
+     lua_error ("internal error - table expected");
     return 1;
    }
-    while (n)
-    {
-     tag(top) = T_NUMBER; nvalue(top) = n+m;
-     *(lua_hashdefine (avalue(arr), top)) = *(top-1);
-     top--;
-     n--;
-    }
-   }
-   break;
-   
-   case STORERECORD:
-   {
-    int n = *(pc++);
-    Object *arr = top-n-1;
-    if (tag(arr) != T_ARRAY)
-    {
-     lua_reportbug ("internal error - table expected");
-     return 1;
-    }
-    while (n)
-    {
-     CodeWord code;
-     get_word(code,pc);
-     tag(top) = T_STRING; svalue(top) = lua_constant[code.w];
-     *(lua_hashdefine (avalue(arr), top)) = *(top-1);
-     top--;
-     n--;
-    }
-   }
+    *(lua_hashdefine (avalue(top-3), top-2)) = *(top-1);
+    top -= 2;
   break;
   
   case ADJUST:
   {
    Object *newtop = base + *(pc++);
-    while (top < newtop) tag(top++) = T_NIL;
-    top = newtop;  /* top could be bigger than newtop */
+    if (top != newtop)
+    {
+     while (top < newtop) tag(top++) = T_NIL;
+     top = newtop;
+    }
   }
   break;
   
@@ -352,7 +278,7 @@ int lua_execute (Byte *pc)
     if (tonumber(top-1)) return 1;
     if (nvalue(top-1) <= 0) nvalue(top-1) = 101;
    }
-    avalue(top-1) = lua_createarray(nvalue(top-1));
+    avalue(top-1) = lua_createarray(lua_hashcreate(nvalue(top-1)));
    if (avalue(top-1) == NULL)
     return 1;
    tag(top-1) = T_ARRAY;
@@ -486,51 +412,39 @@ int lua_execute (Byte *pc)
   
   case ONTJMP:
   {
-    CodeWord code;
-    get_word(code,pc);
-    if (tag(top-1) != T_NIL) pc += code.w;
+    int n = *((Word *)(pc));
+    pc += sizeof(Word);
+    if (tag(top-1) != T_NIL) pc += n;
   }
   break;
   
   case ONFJMP:	   
   {
-    CodeWord code;
-    get_word(code,pc);
-    if (tag(top-1) == T_NIL) pc += code.w;
+    int n = *((Word *)(pc));
+    pc += sizeof(Word);
+    if (tag(top-1) == T_NIL) pc += n;
   }
   break;
   
-   case JMP:
-   {
-    CodeWord code;
-    get_word(code,pc);
-    pc += code.w;
-   }
-   break;
+   case JMP: pc += *((Word *)(pc)) + sizeof(Word); break;
    
-   case UPJMP:
-   {
-    CodeWord code;
-    get_word(code,pc);
-    pc -= code.w;
-   }
-   break;
+   case UPJMP: pc -= *((Word *)(pc)) - sizeof(Word); break; 
   
   case IFFJMP:
   {
-    CodeWord code;
-    get_word(code,pc);
+    int n = *((Word *)(pc));
+    pc += sizeof(Word);
    top--;
-    if (tag(top) == T_NIL) pc += code.w;
+    if (tag(top) == T_NIL) pc += n;
   }
   break;

   case IFFUPJMP:
   {
-    CodeWord code;
-    get_word(code,pc);
+    int n = *((Word *)(pc));
+    pc += sizeof(Word);
    top--;
-    if (tag(top) == T_NIL) pc -= code.w;
+    if (tag(top) == T_NIL) pc -= n;
   }
   break;

@@ -549,8 +463,11 @@ int lua_execute (Byte *pc)
     nvalue(b) = (base-stack);		/* store base value */
     base = b+1;
     pc = newpc;
-     if (lua_checkstack(STACKGAP+(base-stack)))
+     if (MAXSTACK-(base-stack) < STACKGAP)
+     {
+      lua_error ("stack overflow");
      return 1;
+     }
    }
    else if (tag(b-1) == T_CFUNCTION)
    {
@@ -599,25 +516,23 @@ int lua_execute (Byte *pc)
   break;
   
   case HALT:
-    base = stack+oldbase;
   return 0;		/* success */
   
   case SETFUNCTION:
   {
-    CodeWord file, func;
-    get_word(file,pc);
-    get_word(func,pc);
-    if (lua_pushfunction (file.w, func.w))
+    int file, func;
+    file = *((Word *)(pc));
+    pc += sizeof(Word);
+    func = *((Word *)(pc));
+    pc += sizeof(Word);
+    if (lua_pushfunction (file, func))
     return 1;
   }
   break;
   
   case SETLINE:
-   {
-    CodeWord code;
-    get_word(code,pc);
-    lua_debugline = code.w;
-   }
+    lua_debugline = *((Word *)(pc));
+    pc += sizeof(Word);
   break;
   
   case RESET:
@@ -633,13 +548,13 @@ int lua_execute (Byte *pc)


 /*
-** Traverse all objects on stack
+** Mark all strings and arrays used by any object stored at stack.
 */
-void lua_travstack (void (*fn)(Object *))
+void lua_markstack (void)
 {
 Object *o;
 for (o = top-1; o >= stack; o--)
-  fn (o);
+  lua_markobject (o);
 }

 /*
@@ -662,7 +577,6 @@ int lua_dostring (char *string)
 {
 if (lua_openstring (string)) return 1;
 if (lua_parse ()) return 1;
- lua_closestring();
 return 0;
 }

@@ -698,7 +612,6 @@ Object *lua_getparam (int number)
 */
 real lua_getnumber (Object *object)
 {
- if (object == NULL || tag(object) == T_NIL) return 0.0;
 if (tonumber (object)) return 0.0;
 else                   return (nvalue(object));
 }
@@ -708,7 +621,6 @@ real lua_getnumber (Object *object)
 */
 char *lua_getstring (Object *object)
 {
- if (object == NULL || tag(object) == T_NIL) return NULL;
 if (tostring (object)) return NULL;
 else                   return (svalue(object));
 }
@@ -718,7 +630,6 @@ char *lua_getstring (Object *object)
 */
 char *lua_copystring (Object *object)
 {
- if (object == NULL || tag(object) == T_NIL) return NULL;
 if (tostring (object)) return NULL;
 else                   return (strdup(svalue(object)));
 }
@@ -728,7 +639,6 @@ char *lua_copystring (Object *object)
 */
 lua_CFunction lua_getcfunction (Object *object)
 {
- if (object == NULL) return NULL;
 if (tag(object) != T_CFUNCTION) return NULL;
 else                            return (fvalue(object));
 }
@@ -738,7 +648,6 @@ lua_CFunction lua_getcfunction (Object *object)
 */
 void *lua_getuserdata (Object *object)
 {
- if (object == NULL) return NULL;
 if (tag(object) != T_USERDATA) return NULL;
 else                           return (uvalue(object));
 }
@@ -749,14 +658,13 @@ void *lua_getuserdata (Object *object)
 */
 Object *lua_getfield (Object *object, char *field)
 {
- if (object == NULL) return NULL;
 if (tag(object) != T_ARRAY)
  return NULL;
 else
 {
  Object ref;
  tag(&ref) = T_STRING;
-  svalue(&ref) = lua_createstring(field);
+  svalue(&ref) = lua_createstring(lua_strdup(field));
  return (lua_hashdefine(avalue(object), &ref));
 }
 }
@@ -767,7 +675,6 @@ Object *lua_getfield (Object *object, char *field)
 */
 Object *lua_getindexed (Object *object, float index)
 {
- if (object == NULL) return NULL;
 if (tag(object) != T_ARRAY)
  return NULL;
 else
@@ -804,9 +711,12 @@ Object *lua_pop (void)
 */
 int lua_pushnil (void)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
- tag(top++) = T_NIL;
+ }
+ tag(top) = T_NIL;
 return 0;
 }

@@ -815,8 +725,11 @@ int lua_pushnil (void)
 */
 int lua_pushnumber (real n)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
+ }
 tag(top) = T_NUMBER; nvalue(top++) = n;
 return 0;
 }
@@ -826,10 +739,13 @@ int lua_pushnumber (real n)
 */
 int lua_pushstring (char *s)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
+ }
 tag(top) = T_STRING; 
- svalue(top++) = lua_createstring(s);
+ svalue(top++) = lua_createstring(lua_strdup(s));
 return 0;
 }

@@ -838,8 +754,11 @@ int lua_pushstring (char *s)
 */
 int lua_pushcfunction (lua_CFunction fn)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
+ }
 tag(top) = T_CFUNCTION; fvalue(top++) = fn;
 return 0;
 }
@@ -849,8 +768,11 @@ int lua_pushcfunction (lua_CFunction fn)
 */
 int lua_pushuserdata (void *u)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
+ }
 tag(top) = T_USERDATA; uvalue(top++) = u;
 return 0;
 }
@@ -860,8 +782,11 @@ int lua_pushuserdata (void *u)
 */
 int lua_pushobject (Object *o)
 {
- if (lua_checkstack(top-stack+1) == 1)
+ if ((top-stack) >= MAXSTACK-1)
+ {
+  lua_error ("stack overflow");
  return 1;
+ }
 *top++ = *o;
 return 0;
 }
@@ -890,7 +815,7 @@ int lua_storefield (lua_Object object, char *field)
 {
  Object ref, *h;
  tag(&ref) = T_STRING;
-  svalue(&ref) = lua_createstring(field);
+  svalue(&ref) = lua_createstring(lua_strdup(field));
  h = lua_hashdefine(avalue(object), &ref);
  if (h == NULL) return 1;
  if (tag(top-1) == T_MARK) return 1;
@@ -975,9 +900,6 @@ int lua_isuserdata (Object *object)
 void lua_type (void)
 {
 Object *o = lua_getparam(1);
-
- if (lua_constant == NULL)
-  lua_initconstant();
 lua_pushstring (lua_constant[tag(o)]);
 }

@@ -996,7 +918,7 @@ void lua_obj2number (void)
 void lua_print (void)
 {
 int i=1;
- Object *obj;
+ void *obj;
 while ((obj=lua_getparam (i++)) != NULL)
 {
  if      (lua_isnumber(obj))    printf("%g\n",lua_getnumber (obj));
@@ -1009,28 +931,3 @@ void lua_print (void)
 }
 }

-/*
-** 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: 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();
-}
-
-
--- a/opcode.h
+++ b/opcode.h
@@ -1,6 +1,7 @@
 /*
+** opcode.h
 ** TeCGraf - PUC-Rio
-** $Id: opcode.h,v 2.1 1994/04/20 22:07:57 celes Exp celes $
+** 16 Apr 92
 */

 #ifndef opcode_h
@@ -14,28 +15,13 @@
 #define real float
 #endif

-#define FIELDS_PER_FLUSH 40
-
 typedef unsigned char  Byte;

 typedef unsigned short Word;

-typedef signed long  Long;
-
-typedef union
-{
- struct {char c1; char c2;} m;
- Word w;
-} CodeWord;
-
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- float f;
-} CodeFloat;
-
 typedef enum 
 { 
+ NOP,
 PUSHNIL,
 PUSH0, PUSH1, PUSH2,
 PUSHBYTE,
@@ -55,9 +41,7 @@ typedef enum
 STOREGLOBAL,
 STOREINDEXED0,
 STOREINDEXED,
- STORELIST0,
- STORELIST,
- STORERECORD,
+ STOREFIELD,
 ADJUST,
 CREATEARRAY,
 EQOP,
@@ -99,6 +83,7 @@ typedef enum

 typedef void (*Cfunction) (void);
 typedef int  (*Input) (void);
+typedef void (*Unput) (int );

 typedef union
 {
@@ -118,6 +103,7 @@ typedef struct Object

 typedef struct
 {
+ char   *name;
 Object  object;
 } Symbol;

@@ -131,6 +117,7 @@ typedef struct
 #define uvalue(o)	((o)->value.u)

 /* Macros to access symbol table */
+#define s_name(i)	(lua_table[i].name)
 #define s_object(i)	(lua_table[i].object)
 #define s_tag(i)	(tag(&s_object(i)))
 #define s_nvalue(i)	(nvalue(&s_object(i)))
@@ -140,25 +127,18 @@ typedef struct
 #define s_fvalue(i)	(fvalue(&s_object(i)))
 #define s_uvalue(i)	(uvalue(&s_object(i)))

-#define get_word(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;}
-#define get_float(code,pc)   {code.m.c1 = *pc++; code.m.c2 = *pc++;\
-                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
- 
-

 /* Exported functions */
 int     lua_execute   (Byte *pc);
 void    lua_markstack (void);
 char   *lua_strdup (char *l);

-void    lua_setinput   (Input fn);	/* from "lex.c" module */
-char   *lua_lasttext   (void);		/* from "lex.c" module */
+void    lua_setinput   (Input fn);	/* from "lua.lex" module */
+void    lua_setunput   (Unput fn);	/* from "lua.lex" module */
+char   *lua_lasttext   (void);		/* from "lua.lex" module */
 int     lua_parse      (void); 		/* from "lua.stx" module */
 void    lua_type       (void);
 void 	lua_obj2number (void);
 void 	lua_print      (void);
-void 	lua_internaldofile (void);
-void 	lua_internaldostring (void);
-void    lua_travstack (void (*fn)(Object *));

 #endif
--- a/save.lua
+++ b/save.lua
@@ -0,0 +1,47 @@
+$debug
+
+
+function savevar (n,v)
+ if v = nil then return end;
+ if type(v) = "number" then print(n.."="..v) return end
+ if type(v) = "string" then print(n.."='"..v.."'") return end
+ if type(v) = "table" then
+   if v.__visited__ ~= nil then
+     print(n .. "=" .. v.__visited__);
+   else
+    print(n.."=@()")
+    v.__visited__ = n;
+    local r,f;
+    r,f = next(v,nil);
+    while r ~= nil do
+      if r ~= "__visited__" then
+        if type(r) = 'string' then
+          savevar(n.."['"..r.."']",f)
+	else
+          savevar(n.."["..r.."]",f)
+	end
+      end
+      r,f = next(v,r)
+    end
+   end
+ end
+end
+
+function save ()
+local n,v
+  n,v = nextvar(nil)
+  while n ~= nil do 
+    savevar(n,v); 
+    n,v = nextvar(n)
+  end
+end
+
+a = 3
+x = @{a = 4, b = "name", l=@[4,5,67]}
+
+b = @{t=5}
+x.next = b
+
+
+save()
+
--- a/sort.lua
+++ b/sort.lua
@@ -0,0 +1,56 @@
+$debug
+
+function quicksort(r,s)
+	if s<=r then return end		-- caso basico da recursao
+	local v=x[r]
+	local i=r
+	local j=s+1
+		i=i+1; while x[i]<v do i=i+1 end
+		j=j-1; while x[j]>v do j=j-1 end
+		x[i],x[j]=x[j],x[i]
+	while j>i do			-- separacao
+		i=i+1; while x[i]<v do i=i+1 end
+		j=j-1; while x[j]>v do j=j-1 end
+		x[i],x[j]=x[j],x[i]
+	end
+	x[i],x[j]=x[j],x[i]		-- undo last swap
+	x[j],x[r]=x[r],x[j]
+	quicksort(r,j-1)		-- recursao
+	quicksort(j+1,s)
+end
+
+function sort(a,n)			-- selection sort
+ local i=1
+ while i<=n do
+  local m=i
+  local j=i+1
+  while j<=n do
+   if a[j]<a[m] then m=j end
+   j=j+1
+  end
+ a[i],a[m]=a[m],a[i]			-- swap a[i] and a[m]
+ i=i+1
+ end
+end
+
+function main()
+ x=@()
+ n=-1
+ n=n+1;	x[n]="a"
+ n=n+1;	x[n]="waldemar"
+ n=n+1;	x[n]="luiz"
+ n=n+1;	x[n]="lula"
+ n=n+1;	x[n]="peter"
+ n=n+1;	x[n]="raquel"
+ n=n+1;	x[n]="camilo"
+ n=n+1;	x[n]="andre"
+ n=n+1;	x[n]="marcelo"
+ n=n+1;	x[n]="sedrez"
+ n=n+1;	x[n]="z"
+-- quicksort(1,n-1)
+ print(x[0]..","..x[1]..","..x[2]..","..x[3]..","..x[4]..","..x[5]..","..x[6]..","..x[7]..","..x[8]..","..x[9]..","..x[10])
+ sort (x, n-1)
+ print(x[0]..","..x[1]..","..x[2]..","..x[3]..","..x[4]..","..x[5]..","..x[6]..","..x[7]..","..x[8]..","..x[9]..","..x[10])
+end
+
+
--- a/strlib.c
+++ b/strlib.c
@@ -1,16 +1,16 @@
 /*
 ** strlib.c
 ** String library to LUA
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 19 May 93
 */

-char *rcs_strlib="$Id: strlib.c,v 1.1 1993/12/17 18:41:19 celes Exp celes $";
-
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>

-#include "mm.h"
-

 #include "lua.h"

@@ -21,18 +21,16 @@ char *rcs_strlib="$Id: strlib.c,v 1.1 1993/12/17 18:41:19 celes Exp celes $";
 */
 static void str_find (void)
 {
- char *s1, *s2, *f;
+ int n;
+ char *s1, *s2;
 lua_Object o1 = lua_getparam (1);
 lua_Object o2 = lua_getparam (2);
 if (!lua_isstring(o1) || !lua_isstring(o2))
 { lua_error ("incorrect arguments to function `strfind'"); return; }
 s1 = lua_getstring(o1);
 s2 = lua_getstring(o2);
- f = strstr(s1,s2);
- if (f != NULL)
-  lua_pushnumber (f-s1+1);
- else
-  lua_pushnil();
+ n = strstr(s1,s2) - s1 + 1;
+ lua_pushnumber (n);
 }

 /*
@@ -61,15 +59,13 @@ static void str_sub (void)
 lua_Object o1 = lua_getparam (1);
 lua_Object o2 = lua_getparam (2);
 lua_Object o3 = lua_getparam (3);
- if (!lua_isstring(o1) || !lua_isnumber(o2))
+ if (!lua_isstring(o1) || !lua_isnumber(o2) || !lua_isnumber(o3))
 { lua_error ("incorrect arguments to function `strsub'"); return; }
- if (o3 != NULL && !lua_isnumber(o3))
- { lua_error ("incorrect third argument to function `strsub'"); return; }
- s = lua_copystring(o1);
+ s = strdup (lua_getstring(o1));
 start = lua_getnumber (o2);
- end = o3 == NULL ? strlen(s) : lua_getnumber (o3);
+ end = lua_getnumber (o3);
 if (end < start || start < 1 || end > strlen(s))
-  lua_pushstring("");
+  lua_pushstring ("");
 else
 {
  s[end] = 0;
--- a/strlib.h
+++ b/strlib.h
@@ -1,13 +0,0 @@
-/*
-** String library to LUA
-** TeCGraf - PUC-Rio
-** $Id: $
-*/
-
-
-#ifndef strlib_h
-
-void strlib_open (void);
-
-#endif
-
--- a/table.c
+++ b/table.c
@@ -1,188 +1,169 @@
 /*
 ** table.c
 ** Module to control static tables
+** TeCGraf - PUC-Rio
+** 11 May 93
 */

-char *rcs_table="$Id: table.c,v 2.1 1994/04/20 22:07:57 celes Exp celes $";
-
 #include <stdlib.h>
 #include <string.h>

-#include "mm.h"
-
 #include "opcode.h"
-#include "tree.h"
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
 #include "lua.h"

-#define streq(s1,s2)	(s1[0]==s2[0]&&strcmp(s1+1,s2+1)==0)
+#define streq(s1,s2)	(strcmp(s1,s2)==0)

-#define BUFFER_BLOCK 256
+#ifndef MAXSYMBOL
+#define MAXSYMBOL	512
+#endif
+static Symbol  		tablebuffer[MAXSYMBOL] = {
+                                    {"type",{T_CFUNCTION,{lua_type}}},
+                                    {"tonumber",{T_CFUNCTION,{lua_obj2number}}},
+                                    {"next",{T_CFUNCTION,{lua_next}}},
+                                    {"nextvar",{T_CFUNCTION,{lua_nextvar}}},
+                                    {"print",{T_CFUNCTION,{lua_print}}}
+                                                 };
+Symbol	       	       *lua_table=tablebuffer;
+Word   	 		lua_ntable=5;

-Symbol *lua_table;
-static Word lua_ntable = 0;
-static Word lua_maxsymbol = 0;
-
-char **lua_constant;
-static Word lua_nconstant = 0;
-static Word lua_maxconstant = 0;
+#ifndef MAXCONSTANT
+#define MAXCONSTANT	256
+#endif
+static char  	       *constantbuffer[MAXCONSTANT] = {"mark","nil","number",
+                                                       "string","table",
+                                                       "function","cfunction"
+                                                      };
+char  	      	      **lua_constant = constantbuffer;
+Word    		lua_nconstant=T_CFUNCTION+1;

+#ifndef MAXSTRING
+#define MAXSTRING	512
+#endif
+static char 	       *stringbuffer[MAXSTRING];
+char  		      **lua_string = stringbuffer;
+Word    		lua_nstring=0;

+#ifndef MAXARRAY
+#define MAXARRAY	512
+#endif
+static Hash             *arraybuffer[MAXARRAY];
+Hash  	              **lua_array = arraybuffer;
+Word    		lua_narray=0;

 #define MAXFILE 	20
 char  		       *lua_file[MAXFILE];
 int      		lua_nfile;

-/* Variables to controll garbage collection */
-#define GARBAGE_BLOCK 256
-Word lua_block=GARBAGE_BLOCK; /* when garbage collector will be called */
-Word lua_nentity;   /* counter of new entities (strings and arrays) */
-
-
-/*
-** Initialise symbol table with internal functions
-*/
-static void lua_initsymbol (void)
-{
- int n;
- lua_maxsymbol = BUFFER_BLOCK;
- lua_table = (Symbol *) calloc(lua_maxsymbol, sizeof(Symbol));
- if (lua_table == NULL)
- {
-  lua_error ("symbol table: not enough memory");
-  return;
- }
- n = lua_findsymbol("type"); 
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_type;
- n = lua_findsymbol("tonumber");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_obj2number;
- n = lua_findsymbol("next");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_next;
- n = lua_findsymbol("nextvar");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_nextvar;
- n = lua_findsymbol("print");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_print;
- n = lua_findsymbol("dofile");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_internaldofile;
- n = lua_findsymbol("dostring");
- s_tag(n) = T_CFUNCTION; s_fvalue(n) = lua_internaldostring;
-}
-
-
-/*
-** Initialise constant table with pre-defined constants
-*/
-void lua_initconstant (void)
-{
- lua_maxconstant = BUFFER_BLOCK;
- lua_constant = (char **) calloc(lua_maxconstant, sizeof(char *));
- if (lua_constant == NULL)
- {
-  lua_error ("constant table: not enough memory");
-  return;
- }
- lua_findconstant("mark");
- lua_findconstant("nil");
- lua_findconstant("number");
- lua_findconstant("string");
- lua_findconstant("table");
- lua_findconstant("function");
- lua_findconstant("cfunction");
- lua_findconstant("userdata");
-}

 /*
 ** Given a name, search it at symbol table and return its index. If not
-** found, allocate it.
+** found, allocate at end of table, checking oveflow and return its index.
 ** On error, return -1.
 */
 int lua_findsymbol (char *s)
 {
- char *n; 
- if (lua_table == NULL)
-  lua_initsymbol(); 
- n = lua_varcreate(s);
- if (n == NULL)
+ int i;
+ for (i=0; i<lua_ntable; i++)
+  if (streq(s,s_name(i)))
+   return i;
+ if (lua_ntable >= MAXSYMBOL-1)
 {
-  lua_error ("create symbol: not enough memory");
+  lua_error ("symbol table overflow");
  return -1;
 }
- if (indexstring(n) == UNMARKED_STRING)
+ s_name(lua_ntable) = strdup(s);
+ if (s_name(lua_ntable) == NULL)
 {
-  if (lua_ntable == lua_maxsymbol)
-  {
-   lua_maxsymbol *= 2;
-   if (lua_maxsymbol > MAX_WORD)
-   {
-    lua_error("symbol table overflow");
-    return -1;
-   }
-   lua_table = (Symbol *)realloc(lua_table, lua_maxsymbol*sizeof(Symbol));
-   if (lua_table == NULL)
-   {
-    lua_error ("symbol table: not enough memory");
-    return -1;
-   }
-  }
-  indexstring(n) = lua_ntable;
-  s_tag(lua_ntable) = T_NIL;
-  lua_ntable++;
+  lua_error ("not enough memory");
+  return -1;
 }
- return indexstring(n);
+ s_tag(lua_ntable++) = T_NIL;
+ 
+ return (lua_ntable-1);
 }

+/*
+** Given a constant string, eliminate its delimeters (" or '), search it at 
+** constant table and return its index. If not found, allocate at end of 
+** the table, checking oveflow and return its index.
+**
+** For each allocation, the function allocate a extra char to be used to
+** mark used string (it's necessary to deal with constant and string 
+** uniformily). The function store at the table the second position allocated,
+** that represents the beginning of the real string. On error, return -1.
+** 
+*/
+int lua_findenclosedconstant (char *s)
+{
+ int i, j, l=strlen(s);
+ char *c = calloc (l, sizeof(char)); 	/* make a copy */
+ 
+ c++;		/* create mark space */
+
+ /* introduce scape characters */ 
+ for (i=1,j=0; i<l-1; i++)
+ {
+  if (s[i] == '\\')
+  {
+   switch (s[++i])
+   {
+    case 'n': c[j++] = '\n'; break;
+    case 't': c[j++] = '\t'; break;
+    case 'r': c[j++] = '\r'; break;
+    default : c[j++] = '\\'; c[j++] = c[i]; break;
+   }
+  }
+  else
+   c[j++] = s[i];
+ }
+ c[j++] = 0;
+ 
+ for (i=0; i<lua_nconstant; i++)
+  if (streq(c,lua_constant[i]))
+  {
+   free (c-1);
+   return i;
+  }
+ if (lua_nconstant >= MAXCONSTANT-1)
+ {
+  lua_error ("lua: constant string table overflow"); 
+  return -1;
+ }
+ lua_constant[lua_nconstant++] = c;
+ return (lua_nconstant-1);
+}

 /*
-** Given a name, search it at constant table and return its index. If not
-** found, allocate it.
-** On error, return -1.
+** Given a constant string, search it at constant table and return its index.
+** If not found, allocate at end of the table, checking oveflow and return 
+** its index.
+**
+** For each allocation, the function allocate a extra char to be used to
+** mark used string (it's necessary to deal with constant and string 
+** uniformily). The function store at the table the second position allocated,
+** that represents the beginning of the real string. On error, return -1.
+** 
 */
 int lua_findconstant (char *s)
 {
- char *n;
- if (lua_constant == NULL)
-  lua_initconstant();
- n = lua_constcreate(s);
- if (n == NULL)
+ int i;
+ for (i=0; i<lua_nconstant; i++)
+  if (streq(s,lua_constant[i]))
+   return i;
+ if (lua_nconstant >= MAXCONSTANT-1)
 {
-  lua_error ("create constant: not enough memory");
+  lua_error ("lua: constant string table overflow"); 
  return -1;
 }
- if (indexstring(n) == UNMARKED_STRING)
 {
-  if (lua_nconstant == lua_maxconstant)
-  {
-   lua_maxconstant *= 2;
-   if (lua_maxconstant > MAX_WORD)
-   {
-    lua_error("constant table overflow");
-    return -1;
-   }
-   lua_constant = (char**)realloc(lua_constant,lua_maxconstant*sizeof(char*));
-   if (lua_constant == NULL)
-   {
-    lua_error ("constant table: not enough memory");
-    return -1;
-   }
-  }
-  indexstring(n) = lua_nconstant;
-  lua_constant[lua_nconstant] = n;
-  lua_nconstant++;
+  char *c = calloc(strlen(s)+2,sizeof(char));
+  c++;		/* create mark space */
+  lua_constant[lua_nconstant++] = strcpy(c,s);
 }
- return indexstring(n);
-}
-
-
-/*
-** Traverse symbol table objects
-*/
-void lua_travsymbol (void (*fn)(Object *))
-{
- int i;
- for (i=0; i<lua_ntable; i++)
-  fn(&s_object(i));
+ return (lua_nconstant-1);
 }


@@ -191,43 +172,105 @@ void lua_travsymbol (void (*fn)(Object *))
 */
 void lua_markobject (Object *o)
 {
- if (tag(o) == T_STRING && indexstring(svalue(o)) == UNMARKED_STRING)
-  indexstring(svalue(o)) = MARKED_STRING;
- else if (tag(o) == T_ARRAY)
-  lua_hashmark (avalue(o));
+ if (tag(o) == T_STRING)
+  lua_markstring (svalue(o)) = 1;
+ else if (tag(o) == T_ARRAY && markarray(avalue(o)) == 0)
+   lua_hashmark (avalue(o));
 }

-
 /*
-** Garbage collection. 
-** Delete all unused strings and arrays.
+** Mark all strings and arrays used by any object stored at symbol table.
 */
-void lua_pack (void)
+static void lua_marktable (void)
 {
- /* mark stack strings */
- lua_travstack(lua_markobject);
- 
- /* mark symbol table strings */
- lua_travsymbol(lua_markobject);
-
- lua_strcollector();
- lua_hashcollector();
-
- lua_nentity = 0;      /* reset counter */
+ int i;
+ for (i=0; i<lua_ntable; i++)
+  lua_markobject (&s_object(i));
 } 

+/*
+** Simulate a garbage colection. When string table or array table overflows,
+** this function check if all allocated strings and arrays are in use. If
+** there are unused ones, pack (compress) the tables.
+*/
+static void lua_pack (void)
+{
+ lua_markstack ();
+ lua_marktable ();
+ 
+ { /* pack string */
+  int i, j;
+  for (i=j=0; i<lua_nstring; i++)
+   if (lua_markstring(lua_string[i]) == 1)
+   {
+    lua_string[j++] = lua_string[i];
+    lua_markstring(lua_string[i]) = 0;
+   }
+   else
+   {
+    free (lua_string[i]-1);
+   }
+  lua_nstring = j;
+ }
+
+ { /* pack array */
+  int i, j;
+  for (i=j=0; i<lua_narray; i++)
+   if (markarray(lua_array[i]) == 1)
+   {
+    lua_array[j++] = lua_array[i];
+    markarray(lua_array[i]) = 0;
+   }
+   else
+   {
+    lua_hashdelete (lua_array[i]);
+   }
+  lua_narray = j;
+ }
+}

 /*
-** If the string isn't allocated, allocate a new string at string tree.
+** Allocate a new string at string table. The given string is already 
+** allocated with mark space and the function puts it at the end of the
+** table, checking overflow, and returns its own pointer, or NULL on error.
 */
 char *lua_createstring (char *s)
 {
 if (s == NULL) return NULL;
 
- if (lua_nentity == lua_block)
+ if (lua_nstring >= MAXSTRING-1)
+ {
  lua_pack ();
- lua_nentity++;
- return lua_strcreate(s);
+  if (lua_nstring >= MAXSTRING-1)
+  {
+   lua_error ("string table overflow");
+   return NULL;
+  }
+ } 
+ lua_string[lua_nstring++] = s;
+ return s;
+}
+
+/*
+** Allocate a new array, already created, at array table. The function puts 
+** it at the end of the table, checking overflow, and returns its own pointer,
+** or NULL on error.
+*/
+void *lua_createarray (void *a)
+{
+ if (a == NULL) return NULL;
+ 
+ if (lua_narray >= MAXARRAY-1)
+ {
+  lua_pack ();
+  if (lua_narray >= MAXARRAY-1)
+  {
+   lua_error ("indexed table overflow");
+   return NULL;
+  }
+ } 
+ lua_array[lua_narray++] = a;
+ return a;
 }


@@ -251,15 +294,6 @@ int lua_addfile (char *fn)
 return 0;
 }

-/*
-** Delete a file from file stack
-*/
-int lua_delfile (void)
-{
- lua_nfile--; 
- return 1;
-}
-
 /*
 ** Return the last file name set.
 */
@@ -273,7 +307,7 @@ char *lua_filename (void)
 */
 void lua_nextvar (void)
 {
- char *varname, *next;
+ int index;
 Object *o = lua_getparam (1);
 if (o == NULL)
 { lua_error ("too few arguments to function `nextvar'"); return; }
@@ -281,7 +315,7 @@ void lua_nextvar (void)
 { lua_error ("too many arguments to function `nextvar'"); return; }
 if (tag(o) == T_NIL)
 {
-  varname = 0;
+  index = 0;
 }
 else if (tag(o) != T_STRING) 
 { 
@@ -290,20 +324,28 @@ void lua_nextvar (void)
 }
 else
 {
-  varname = svalue(o);
+  for (index=0; index<lua_ntable; index++)
+   if (streq(s_name(index),svalue(o))) break;
+  if (index == lua_ntable) 
+  {
+   lua_error ("name not found in function `nextvar'");
+   return;
+  }
+  index++;
+  while (index < lua_ntable-1 && tag(&s_object(index)) == T_NIL) index++;
+  
+  if (index == lua_ntable-1)
+  {
+   lua_pushnil();
+   lua_pushnil();
+   return;
+  }
 }
- next = lua_varnext(varname);
- if (next == NULL)
- {
-  lua_pushnil();
-  lua_pushnil();
- }
- else
 {
  Object name;
  tag(&name) = T_STRING;
-  svalue(&name) = next;
+  svalue(&name) = lua_createstring(lua_strdup(s_name(index)));
  if (lua_pushobject (&name)) return;
-  if (lua_pushobject (&s_object(indexstring(next)))) return;
+  if (lua_pushobject (&s_object(index))) return;
 }
 }
--- a/table.h
+++ b/table.h
@@ -1,32 +1,39 @@
 /*
+** table.c
 ** Module to control static tables
 ** TeCGraf - PUC-Rio
-** $Id: table.h,v 2.1 1994/04/20 22:07:57 celes Exp celes $
+** 11 May 93
 */

 #ifndef table_h
 #define table_h

 extern Symbol *lua_table;
+extern Word    lua_ntable;
+
 extern char  **lua_constant;
+extern Word    lua_nconstant;
+
+extern char  **lua_string;
+extern Word    lua_nstring;
+
+extern Hash  **lua_array;
+extern Word    lua_narray;

 extern char   *lua_file[];
 extern int     lua_nfile;

-extern Word    lua_block;
-extern Word    lua_nentity;
+#define lua_markstring(s)	(*((s)-1))


-void  lua_initconstant (void);
-int   lua_findsymbol      (char *s);
-int   lua_findconstant    (char *s);
-void  lua_travsymbol      (void (*fn)(Object *));
-void  lua_markobject      (Object *o);
-void  lua_pack            (void);
-char *lua_createstring    (char *s);
-int   lua_addfile         (char *fn);
-int   lua_delfile 	  (void);
-char *lua_filename        (void);
-void  lua_nextvar         (void);
+int   lua_findsymbol           (char *s);
+int   lua_findenclosedconstant (char *s);
+int   lua_findconstant         (char *s);
+void  lua_markobject           (Object *o);
+char *lua_createstring         (char *s);
+void *lua_createarray          (void *a);
+int   lua_addfile              (char *fn);
+char *lua_filename             (void);
+void  lua_nextvar              (void);

 #endif
--- a/test.lua
+++ b/test.lua
@@ -0,0 +1,15 @@
+$debug
+
+
+function somaP (x1,y1,x2,y2)
+  return x1+x2, y1+y2
+end
+
+function norma (x,y)
+  return x*x+y*y
+end
+
+function retorno_multiplo ()
+ print (norma(somaP(2,3,4,5)))
+end
+
--- a/tree.c
+++ b/tree.c
@@ -1,210 +0,0 @@
-/*
-** tree.c
-** TecCGraf - PUC-Rio
-*/
- 
-char *rcs_tree="$Id: $";
-
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "lua.h"
-#include "tree.h"
-
-
-#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b))) 
-
-
-typedef struct TreeNode
-{
- struct TreeNode *right;
- struct TreeNode *left;
- Word            index;
- char            str[1];        /* \0 byte already reserved */
-} TreeNode;
-
-static TreeNode *string_root = NULL;
-static TreeNode *constant_root = NULL;
-static TreeNode *variable_root = NULL;
-
-/*
-** Insert a new string/constant/variable at the tree. 
-*/
-static char *tree_create (TreeNode **node, char *str)
-{
- if (*node == NULL)
- {
-  *node = (TreeNode *) malloc (sizeof(TreeNode)+strlen(str));
-  if (*node == NULL)
-   lua_error ("memoria insuficiente\n");
-  (*node)->left = (*node)->right = NULL;
-  strcpy((*node)->str, str);
-  (*node)->index = UNMARKED_STRING;
-  return (*node)->str;
- }
- else
- {
-  int c = lua_strcmp(str, (*node)->str);
-  if (c < 0) 
-   return tree_create(&(*node)->left, str);
-  else if (c > 0)
-   return tree_create(&(*node)->right, str);
-  else
-   return (*node)->str;
- }
-}
-
-char *lua_strcreate (char *str) 
-{
- return tree_create(&string_root, str);
-}
-
-char *lua_constcreate (char *str) 
-{
- return tree_create(&constant_root, str);
-}
-
-char *lua_varcreate (char *str) 
-{
- return tree_create(&variable_root, str);
-}
-
-
-
-/*
-** Free a node of the tree
-*/
-static TreeNode *lua_strfree (TreeNode *parent)
-{
- if (parent->left == NULL && parent->right == NULL) /* no child */
- {
-  free (parent);
-  return NULL;
- }
- else if (parent->left == NULL)         /* only right child */
- {
-  TreeNode *p = parent->right;
-  free (parent);
-  return p;
- }
- else if (parent->right == NULL)        /* only left child */
- {
-  TreeNode *p = parent->left;
-  free (parent);
-  return p;
- }
- else                                   /* two children */
- {
-  TreeNode *p = parent, *r = parent->right;
-  while (r->left != NULL)
-  {
-   p = r;
-   r = r->left;
-  }
-  if (p == parent)
-  {
-   r->left  = parent->left;
-   parent->left = NULL;
-   parent->right = r->right;
-   r->right = lua_strfree(parent);
-  }
-  else
-  {
-   TreeNode *t = r->right;
-   r->left  = parent->left;
-   r->right = parent->right;
-   parent->left = NULL;
-   parent->right = t;
-   p->left  = lua_strfree(parent);
-  }
-  return r;
- }
-}
-
-/*
-** Traverse tree for garbage collection
-*/
-static TreeNode *lua_travcollector (TreeNode *r)
-{
- if (r == NULL) return NULL;
- r->right = lua_travcollector(r->right);
- r->left  = lua_travcollector(r->left);
- if (r->index == UNMARKED_STRING) 
-  return lua_strfree(r);
- else
- {
-  r->index = UNMARKED_STRING;
-  return r;
- }
-}
-
-
-/*
-** Garbage collection function.
-** This function traverse the tree freening unindexed strings
-*/
-void lua_strcollector (void)
-{
- string_root = lua_travcollector(string_root);
-}
-
-/*
-** Return next variable.
-*/
-static TreeNode *tree_next (TreeNode *node, char *str)
-{
-#if 0
- if (node == NULL) return NULL;
- if (str == NULL || lua_strcmp(str, node->str) < 0)
- {
-  TreeNode *result = tree_next(node->left, str);
-  return result == NULL ? node : result;
- }
- else
- {
-  return tree_next(node->right, str);
- }
-#else
- if (node == NULL) return NULL;
- else if (str == NULL) return node;
- else
- {
-  int c = lua_strcmp(str, node->str);
-  if (c == 0)
-   return node->left != NULL ? node->left : node->right;
-  else if (c < 0)
-  {
-   TreeNode *result = tree_next(node->left, str);
-   return result != NULL ? result : node->right;
-  }
-  else
-   return tree_next(node->right, str);
- }
-#endif
-}
-
-char *lua_varnext (char *n)
-{
- TreeNode *result = tree_next(variable_root, n);
- return result != NULL ? result->str : NULL;
-}
-
-
-/*
-** Given an id, find the string with exaustive search
-*/
-static char *tree_name (TreeNode *node, Word index)
-{
- if (node == NULL) return NULL;
- if (node->index == index) return node->str;
- else
- {
-  char *result = tree_name(node->left, index);
-  return result != NULL ? result : tree_name(node->right, index);
- }
-}
-char *lua_varname (Word index)
-{
- return tree_name(variable_root, index);
-}
--- a/tree.h
+++ b/tree.h
@@ -1,27 +0,0 @@
-/*
-** tree.h
-** TecCGraf - PUC-Rio
-** $Id: $
-*/
-
-#ifndef tree_h
-#define tree_h
-
-#include "opcode.h"
-
-
-#define UNMARKED_STRING	0xFFFF
-#define MARKED_STRING   0xFFFE
-#define MAX_WORD        0xFFFD
-
-#define indexstring(s) (*(((Word *)s)-1))
-
-
-char *lua_strcreate    (char *str);
-char *lua_constcreate  (char *str);
-char *lua_varcreate    (char *str);
-void  lua_strcollector (void);
-char *lua_varnext      (char *n);
-char *lua_varname      (Word index);
-
-#endif
--- a/type.lua
+++ b/type.lua
@@ -0,0 +1,35 @@
+$debug
+
+function check (object, class)
+ local v = next(object,nil);
+ while v ~= nil do
+   if class[v] = nil then print("unknown field: " .. v) 
+   elseif type(object[v]) ~= class[v].type  
+     then print("wrong type for field " .. v)
+   end
+   v = next(object,v);
+ end
+ v = next(class,nil);
+ while v ~= nil do
+   if object[v] = nil then
+     if class[v].default ~= nil then
+       object[v] = class[v].default
+     else print("field "..v.." not initialized")
+     end
+   end
+   v = next(class,v);
+ end
+end
+
+typetrilha = @{x = @{default = 0, type = "number"},
+               y = @{default = 0, type = "number"},
+               name = @{type = "string"}
+              }
+
+function trilha (t)  check(t,typetrilha) end
+
+t1 = @trilha{ x = 4, name = "3"}
+
+a = "na".."me"
+
+
--- a/y_tab.c
+++ b/y_tab.c
--- a/y_tab.h
+++ b/y_tab.h
@@ -0,0 +1,35 @@
+
+typedef union  
+{
+ int   vInt;
+ long  vLong;
+ float vFloat;
+ Word  vWord;
+ Byte *pByte;
+} YYSTYPE;
+extern YYSTYPE yylval;
+# define NIL 257
+# define IF 258
+# define THEN 259
+# define ELSE 260
+# define ELSEIF 261
+# define WHILE 262
+# define DO 263
+# define REPEAT 264
+# define UNTIL 265
+# define END 266
+# define RETURN 267
+# define LOCAL 268
+# define NUMBER 269
+# define FUNCTION 270
+# define NAME 271
+# define STRING 272
+# define DEBUG 273
+# define NOT 274
+# define AND 275
+# define OR 276
+# define NE 277
+# define LE 278
+# define GE 279
+# define CONC 280
+# define UNARY 281
				`@@ -0,0 +1 @@`
				`/* empty file to please silly code in iolib.c and opcode.c */`