Lua 2.12.1

52 files changed, 6205 insertions, 6545 deletions

diff --git a/COPYRIGHT b/COPYRIGHT
new file mode 100644
index 00000000..b730ccd7
--- /dev/null
+++ b/COPYRIGHT
@@ -0,0 +1,18 @@
+Copyright (c) 1994-1995
+Waldemar Celes Filho, Luiz Henrique de Figueiredo, Roberto Ierusalimschy.
+All rights reserved.
+
+Permission is hereby granted, without written agreement and without license
+or royalty fees, to use, copy, modify, and distribute this software and its
+documentation for any purpose, provided that the above copyright notice and
+the following two paragraphs appear in all copies of this software.
+
+In no event shall the authors be liable to any party for direct, indirect,
+special, incidental, or consequential damages arising out of the use of this
+software and its documentation.
+
+The authors specifically disclaims any warranties, including, but not limited
+to, the implied warranties of merchantability and fitness for a particular
+purpose.  the software provided hereunder is on an "as is" basis, and the
+authors have no obligation to provide maintenance, support, updates,
+enhancements, or modifications.
diff --git a/Makefile b/Makefile
deleted file mode 100644
index 10640e0d..00000000
--- a/Makefile
+++ /dev/null
@@ -1,11 +0,0 @@
-# makefile for lua hierarchy
-
-all:
-	(cd src; make)
-	(cd clients/lib; make)
-	(cd clients/lua; make)
-
-clean:
-	(cd src; make clean)
-	(cd clients/lib; make clean)
-	(cd clients/lua; make clean)
diff --git a/README b/README
index 3b8ad6aa..6b349cec 100644
--- a/README
+++ b/README
@@ -5,43 +5,46 @@
   Dozens of industrial products developed by TeCGraf use Lua.
 
 * Some features of Lua
-  Lua has a simple, pascal-like, syntax.
-  Variables need no declaration, but Lua has user-controlled type constructors.
-  Lua has powerful data description constructs (e.g., associative arrays).
-  Functions can receive a variable number of arguments and can return multiple
-  values.
-  Lua programs are compiled into bytecodes, which are then interpreted to
-  simulate a virtual machine.
-  Lua is written in ANSI C and is completely portable.
+  + a simple, pascal-like, syntax;
+  + powerful data description constructs (e.g., associative arrays);
+  + user-controlled type constructors;
+  + fallbacks for extending the meaning of the language in unconventional ways;
+  + Lua programs are compiled into bytecodes, which are then interpreted to
+    simulate a virtual machine;
+  + portable, written in ANSI C.
 
-* Coming soon
-  Object-oriented extensions.
-  Lazy evaluation.
+* Availability
+  ftp://ftp.icad.puc-rio.br/pub/lua/lua-2.1.tar.gz
+  http://www.inf.puc-rio.br/projetos/roberto/lua.html
+
+* Changes since version 1.1 (current version is 2.1)
+  + object-oriented support;
+  + fallbacks;
+  + simplified syntax for tables;
+  + many internal improvements.
 
 * Installing
   To make, simply type domake.
   If make succeeds, you get an interpreter in ./bin/lua.
   The libraries are in ./lib.  The include files are in ./include.
   You don't need the other directories for development.
-  There is documentation in ./doc and tests in ./test.
-  The documentation includes a reference manual and an article on the
-  design and implementation of Lua.
+  There is a reference manual in ./doc and tests in ./test.
   This distribution is biased towards SunOS 4 with gcc but it is simple to
   change the Makefiles for other systems.
+  If you are running SunOs, type also "domake dynamic" to build shared
+  libraries in ./lib.
 
 * Legal matters
-  Lua is not in the public domain;  TeCGraf keeps its copyright.
-  Nevertheless, Lua is freely available for academic purposes by anonymous ftp
-  at ftp.icad.puc-rio.br:/pub/lua/lua-1.1.tar.Z.
-  For commercial purposes, please contact us.
+  Lua is now freely available for both academic and commercial purposes.
+  Lua is not in the public domain; TeCGraf keeps its copyright.
 
 * Contacting the authors
   Send your comments, bug reports and anything else to lhf@icad.puc-rio.br.
   Please send me email if you download Lua so that we can know how far it goes.
 
 --
-Luiz Henrique de Figueiredo                          email: lhf@icad.puc-rio.br
-TeCGraf-Grupo de Tecnologia em Computacao Grafica, ITS, PUC-Rio
-Rua Marques de Sao Vicente 225                       voice: +55 21 529-9424
-22453-900 Rio de Janeiro, RJ, Brasil                   fax: +55 21 511-5645
+Luiz Henrique de Figueiredo                       email: lhf@icad.puc-rio.br
+TeCGraf-Grupo de Tecnologia em Computacao Grafica, Dep. Informatica, PUC-Rio
+Rua Marques de Sao Vicente 225                        voice: +55 21 529-9424
+22453-900 Rio de Janeiro, RJ, Brasil                    fax: +55 21 511-5645
 --
diff --git a/clients/lib/Makefile b/clients/lib/Makefile
index 4110a62f..b191b750 100644
--- a/clients/lib/Makefile
+++ b/clients/lib/Makefile
@@ -3,17 +3,26 @@
 INC= $(LUA)/include
 LIB= $(LUA)/lib
 
+# in SunOs /usr/5include contains prototypes for standard lib
+INCS= -I/usr/5include -I$(INC)
+WARN= -Wall -Wmissing-prototypes -Wshadow -ansi
+
 CC= gcc
-CFLAGS= -Wall -O2 -I$(INC) $(DEFS)
+CFLAGS= $(INCS) $(DEFS) $(WARN) -O2
 
 OBJS= iolib.o mathlib.o strlib.o
+
 SLIB= $(LIB)/liblualib.a
-DLIB= $(LIB)/liblualib.so.1.1
 
-libs: $(SLIB) $(DLIB)
+# dynamic libraries only work for SunOs
+DLIB= $(LIB)/liblualib.so.2.1
+
+all: $(SLIB)
+
+dynamic: $(DLIB)
 
 $(SLIB): $(OBJS)
-	ar ruvl $@ $(OBJS)
+	ar rcuv $@ $(OBJS)
 	ranlib $(SLIB)
 
 $(DLIB): $(OBJS)
@@ -21,3 +30,6 @@ $(DLIB): $(OBJS)
 
 clean:
 	rm -f $(OBJS) $(SLIB) $(DLIB)
+
+co:
+	co -M iolib.c mathlib.c mathlib.h strlib.c strlib.h
diff --git a/clients/lib/iolib.c b/clients/lib/iolib.c
index b972124b..bb3883ab 100644
--- a/clients/lib/iolib.c
+++ b/clients/lib/iolib.c
@@ -3,20 +3,18 @@
 ** Input/output library to LUA
 */
 
-char *rcs_iolib="$Id: iolib.c,v 1.4 1994/04/25 20:11:23 celes Exp $";
+char *rcs_iolib="$Id: iolib.c,v 1.21 1995/02/06 19:36:13 roberto Exp $";
 
-#include <stdlib.h>
-#include <string.h>
 #include <stdio.h>
 #include <ctype.h>
+#include <sys/types.h>
 #include <sys/stat.h>
-#ifdef __GNUC__
-#include <floatingpoint.h>
-#endif
-
-#include "mm.h"
+#include <string.h>
+#include <time.h>
+#include <stdlib.h>
 
 #include "lua.h"
+#include "lualib.h"
 
 static FILE *in=stdin, *out=stdout;
 
@@ -31,7 +29,7 @@ static FILE *in=stdin, *out=stdout;
 static void io_readfrom (void)
 {
  lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart input */
+ if (o == LUA_NOOBJECT)			/* restore standart input */
  {
   if (in != stdin)
   {
@@ -76,7 +74,7 @@ static void io_readfrom (void)
 static void io_writeto (void)
 {
  lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
+ if (o == LUA_NOOBJECT)			/* restore standart output */
  {
   if (out != stdout)
   {
@@ -122,7 +120,7 @@ static void io_writeto (void)
 static void io_appendto (void)
 {
  lua_Object o = lua_getparam (1);
- if (o == NULL)			/* restore standart output */
+ if (o == LUA_NOOBJECT)			/* restore standart output */
  {
   if (out != stdout)
   {
@@ -179,7 +177,7 @@ 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 == LUA_NOOBJECT || !lua_isstring(o))	/* free format */
  {
   int c;
   char s[256];
@@ -187,7 +185,7 @@ static void io_read (void)
    ;
   if (c == '\"')
   {
-   int c, n=0;
+   int n=0;
    while((c = fgetc(in)) != '\"')
    {
     if (c == EOF)
@@ -201,7 +199,7 @@ static void io_read (void)
   }
   else if (c == '\'')
   {
-   int c, n=0;
+   int n=0;
    while((c = fgetc(in)) != '\'')
    {
     if (c == EOF)
@@ -215,7 +213,6 @@ static void io_read (void)
   }
   else
   {
-   char *ptr;
    double d;
    ungetc (c, in);
    if (fscanf (in, "%s", s) != 1)
@@ -223,8 +220,7 @@ static void io_read (void)
     lua_pushnil ();
     return;
    }
-   d = strtod (s, &ptr);
-   if (!(*ptr))
+   if (sscanf(s, "%lf %*c", &d) == 1)
    {
     lua_pushnumber (d);
     return;
@@ -269,9 +265,9 @@ static void io_read (void)
     break;
     case 'f': case 'g': case 'e':
     {
-     float f;
-     sscanf (s, "%f", &f);
-     lua_pushnumber(f);
+     float fl;
+     sscanf (s, "%f", &fl);
+     lua_pushnumber(fl);
     }
     break;
     default: 
@@ -314,6 +310,38 @@ static void io_read (void)
 
 
 /*
+** Read characters until a given one. The delimiter is not read.
+*/
+static void io_readuntil (void)
+{
+ int n=255,m=0;
+ int c,d;
+ char *s;
+ lua_Object lo = lua_getparam(1);
+ if (!lua_isstring(lo))
+  d = EOF; 
+ else
+  d = *lua_getstring(lo);
+ 
+ s = (char *)malloc(n+1);
+ while((c = fgetc(in)) != EOF && c != d)
+ {
+  if (m==n)
+  {
+   n *= 2;
+   s = (char *)realloc(s, n+1);
+  }
+  s[m++] = c;
+ }
+ if (c != EOF) ungetc(c,in);
+ s[m] = 0;
+ lua_pushstring(s);
+ free(s);
+}
+
+
+
+/*
 ** Write a variable. On error put 0 on stack, otherwise put 1.
 ** LUA interface:
 **			status = write (variable [,format])
@@ -341,39 +369,49 @@ static void io_read (void)
 */
 static char *buildformat (char *e, lua_Object o)
 {
- static char buffer[512];
+ static char buffer[2048];
  static char f[80];
  char *string = &buffer[255];
+ char *fstart=e, *fspace, *send;
  char t, j='r';
- int  m=0, n=0, l;
+ int  m=0, n=-1, l;
  while (isspace(*e)) e++;
+ fspace = e;
  t = *e++;
  if (*e == '<' || *e == '|' || *e == '>') j = *e++;
  while (isdigit(*e))
   m = m*10 + (*e++ - '0');
- e++;	/* skip point */
+ if (*e == '.') e++;	/* skip point */
  while (isdigit(*e))
-  n = n*10 + (*e++ - '0');
+  if (n < 0) n = (*e++ - '0');
+  else       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))
+ if (m >  0)   sprintf(strchr(f,0),"%d", m);
+ if (n >= 0)   sprintf(strchr(f,0),".%d", n);
+ switch (t)
  {
-  case 'i': t = 'i';
+  case 'i': case 'I': t = 'd';
+   sprintf(strchr(f,0), "%c", t);
    sprintf (string, f, (long int)lua_getnumber(o));
   break;
-  case 'f': case 'g': case 'e': t = 'f';
+  case 'f': case 'g': case 'e': case 'G': case 'E': 
+   sprintf(strchr(f,0), "%c", t);
    sprintf (string, f, (float)lua_getnumber(o));
   break;
-  case 's': t = 's';
+  case 'F': t = 'f';
+   sprintf(strchr(f,0), "%c", t);
+   sprintf (string, f, (float)lua_getnumber(o));
+  break;
+  case 's': case 'S': t = 's';
+   sprintf(strchr(f,0), "%c", t);
    sprintf (string, f, lua_getstring(o));
   break;
   default: return "";
  }
  l = strlen(string);
+ send = string+l;
  if (m!=0 && l>m)
  {
   int i;
@@ -383,25 +421,34 @@ static char *buildformat (char *e, lua_Object o)
  }
  else if (m!=0 && j=='|')
  {
+  int k;
   int i=l-1;
-  while (isspace(string[i])) i--;
-  string -= (m-i) / 2;
-  i=0;
-  while (string[i]==0) string[i++] = ' ';
-  string[l] = 0;
+  while (isspace(string[i]) || string[i]==0) i--;
+  string -= (m-i)/2;
+  for(k=0; k<(m-i)/2; k++)
+   string[k] = ' ';
+ }
+ /* add space characteres */
+ while (fspace != fstart)
+ {
+  string--;
+  fspace--;
+  *string = *fspace; 
  }
+ while (isspace(*e)) *send++ = *e++;
+ *send = 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 */
+ if (o1 == LUA_NOOBJECT)			/* new line */
  {
   fprintf (out, "\n");
   lua_pushnumber(1);
  }
- else if (o2 == NULL)   		/* free format */
+ else if (o2 == LUA_NOOBJECT)   		/* free format */
  {
   int status=0;
   if (lua_isnumber(o1))
@@ -426,10 +473,10 @@ static void io_write (void)
 ** Execute a executable program using "system".
 ** Return the result of execution.
 */
-void io_execute (void)
+static void io_execute (void)
 {
  lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
+ if (o == LUA_NOOBJECT || !lua_isstring (o))
  {
   lua_error ("incorrect argument to function 'execute`");
   lua_pushnumber (0);
@@ -446,10 +493,10 @@ void io_execute (void)
 ** Remove a file.
 ** On error put 0 on stack, otherwise put 1.
 */
-void io_remove  (void)
+static void io_remove  (void)
 {
  lua_Object o = lua_getparam (1);
- if (o == NULL || !lua_isstring (o))
+ if (o == LUA_NOOBJECT || !lua_isstring (o))
  {
   lua_error ("incorrect argument to function 'execute`");
   lua_pushnumber (0);
@@ -464,6 +511,88 @@ void io_remove  (void)
  return;
 }
 
+
+/*
+** To get a environment variables
+*/
+static void io_getenv (void)
+{
+ lua_Object s = lua_getparam(1);
+ if (!lua_isstring(s))
+  lua_pushnil();
+ else
+ {
+  char *env = getenv(lua_getstring(s));
+  if (env == NULL) lua_pushnil();
+  else             lua_pushstring(env); 
+ }
+}
+
+/*
+** Return time: hour, min, sec
+*/
+static void io_time (void)
+{
+ time_t t;
+ struct tm *s;
+ 
+ time(&t);
+ s = localtime(&t);
+ lua_pushnumber(s->tm_hour);
+ lua_pushnumber(s->tm_min);
+ lua_pushnumber(s->tm_sec);
+}
+ 
+/*
+** Return date: dd, mm, yyyy
+*/
+static void io_date (void)
+{
+ time_t t;
+ struct tm *s;
+ 
+ time(&t);
+ s = localtime(&t);
+ lua_pushnumber(s->tm_mday);
+ lua_pushnumber(s->tm_mon+1);
+ lua_pushnumber(s->tm_year+1900);
+}
+ 
+/*
+** Beep
+*/
+static void io_beep (void)
+{
+ printf("\a");
+}
+ 
+/*
+** To exit
+*/
+static void io_exit (void)
+{
+ lua_Object o = lua_getparam(1);
+ if (lua_isstring(o))
+  printf("%s\n", lua_getstring(o));
+ exit(1);
+}
+
+/*
+** To debug a lua program. Start a dialog with the user, interpreting
+   lua commands until an 'cont'.
+*/
+static void io_debug (void)
+{
+  while (1)
+  {
+    char buffer[250];
+    fprintf(stderr, "lua_debug> ");
+    if (gets(buffer) == 0) return;
+    if (strcmp(buffer, "cont") == 0) return;
+    lua_dostring(buffer);
+  }
+}
+
 /*
 ** Open io library
 */
@@ -473,7 +602,14 @@ void iolib_open (void)
  lua_register ("writeto",  io_writeto);
  lua_register ("appendto", io_appendto);
  lua_register ("read",     io_read);
+ lua_register ("readuntil",io_readuntil);
  lua_register ("write",    io_write);
  lua_register ("execute",  io_execute);
  lua_register ("remove",   io_remove);
+ lua_register ("getenv",   io_getenv);
+ lua_register ("time",     io_time);
+ lua_register ("date",     io_date);
+ lua_register ("beep",     io_beep);
+ lua_register ("exit",     io_exit);
+ lua_register ("debug",    io_debug);
 }
diff --git a/clients/lib/mathlib.c b/clients/lib/mathlib.c
index c84af8cb..ca5ab780 100644
--- a/clients/lib/mathlib.c
+++ b/clients/lib/mathlib.c
@@ -3,24 +3,26 @@
 ** Mathematics library to LUA
 */
 
-char *rcs_mathlib="$Id: mathlib.c,v 1.1 1993/12/17 18:41:19 celes Exp $";
+char *rcs_mathlib="$Id: mathlib.c,v 1.9 1995/02/06 19:36:43 roberto Exp $";
 
 #include <stdio.h>		/* NULL */
 #include <math.h>
 
+#include "lualib.h"
 #include "lua.h"
 
-#define TODEGREE(a) ((a)*180.0/3.14159)
-#define TORAD(a)    ((a)*3.14159/180.0)
+#define PI          3.14159265358979323846
+#define TODEGREE(a) ((a)*180.0/PI)
+#define TORAD(a)    ((a)*PI/180.0)
 
 static void math_abs (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `abs'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `abs'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `abs'"); return; }
+   lua_error ("incorrect arguments to function `abs'");
  d = lua_getnumber(o);
  if (d < 0) d = -d;
  lua_pushnumber (d);
@@ -31,10 +33,10 @@ static void math_sin (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sin'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `sin'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sin'"); return; }
+   lua_error ("incorrect arguments to function `sin'");
  d = lua_getnumber(o);
  lua_pushnumber (sin(TORAD(d)));
 }
@@ -45,10 +47,10 @@ static void math_cos (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `cos'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `cos'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `cos'"); return; }
+   lua_error ("incorrect arguments to function `cos'");
  d = lua_getnumber(o);
  lua_pushnumber (cos(TORAD(d)));
 }
@@ -59,10 +61,10 @@ static void math_tan (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `tan'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `tan'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `tan'"); return; }
+   lua_error ("incorrect arguments to function `tan'");
  d = lua_getnumber(o);
  lua_pushnumber (tan(TORAD(d)));
 }
@@ -72,10 +74,10 @@ static void math_asin (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `asin'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `asin'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `asin'"); return; }
+   lua_error ("incorrect arguments to function `asin'");
  d = lua_getnumber(o);
  lua_pushnumber (TODEGREE(asin(d)));
 }
@@ -85,10 +87,10 @@ static void math_acos (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `acos'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `acos'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `acos'"); return; }
+   lua_error ("incorrect arguments to function `acos'");
  d = lua_getnumber(o);
  lua_pushnumber (TODEGREE(acos(d)));
 }
@@ -99,10 +101,10 @@ static void math_atan (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `atan'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `atan'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `atan'"); return; }
+   lua_error ("incorrect arguments to function `atan'");
  d = lua_getnumber(o);
  lua_pushnumber (TODEGREE(atan(d)));
 }
@@ -112,10 +114,10 @@ static void math_ceil (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `ceil'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `ceil'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `ceil'"); return; }
+   lua_error ("incorrect arguments to function `ceil'");
  d = lua_getnumber(o);
  lua_pushnumber (ceil(d));
 }
@@ -125,10 +127,10 @@ static void math_floor (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `floor'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `floor'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `floor'"); return; }
+   lua_error ("incorrect arguments to function `floor'");
  d = lua_getnumber(o);
  lua_pushnumber (floor(d));
 }
@@ -139,7 +141,7 @@ static void math_mod (void)
  lua_Object o1 = lua_getparam (1);
  lua_Object o2 = lua_getparam (2);
  if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `mod'"); return; }
+   lua_error ("incorrect arguments to function `mod'");
  d1 = (int) lua_getnumber(o1);
  d2 = (int) lua_getnumber(o2);
  lua_pushnumber (d1%d2);
@@ -150,24 +152,36 @@ static void math_sqrt (void)
 {
  double d;
  lua_Object o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `sqrt'"); return; }
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `sqrt'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `sqrt'"); return; }
+   lua_error ("incorrect arguments to function `sqrt'");
  d = lua_getnumber(o);
  lua_pushnumber (sqrt(d));
 }
 
+static int old_pow;
+
 static void math_pow (void)
 {
- double d1, d2;
  lua_Object o1 = lua_getparam (1);
  lua_Object o2 = lua_getparam (2);
- if (!lua_isnumber(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `pow'"); return; }
- d1 = lua_getnumber(o1);
- d2 = lua_getnumber(o2);
- lua_pushnumber (pow(d1,d2));
+ lua_Object op = lua_getparam(3);
+ if (!lua_isnumber(o1) || !lua_isnumber(o2) || *(lua_getstring(op)) != 'p')
+ {
+   lua_Object old = lua_getlocked(old_pow);
+   lua_pushobject(o1);
+   lua_pushobject(o2);
+   lua_pushobject(op);
+   if (lua_callfunction(old) != 0)
+     lua_error(NULL);
+ }
+ else
+ {
+   double d1 = lua_getnumber(o1);
+   double d2 = lua_getnumber(o2);
+   lua_pushnumber (pow(d1,d2));
+ }
 }
 
 static void math_min (void)
@@ -175,15 +189,15 @@ static void math_min (void)
  int i=1;
  double d, dmin;
  lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `min'"); return; }
+ if ((o = lua_getparam(i++)) == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `min'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `min'"); return; }
+   lua_error ("incorrect arguments to function `min'");
  dmin = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
+ while ((o = lua_getparam(i++)) != LUA_NOOBJECT)
  {
   if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `min'"); return; }
+    lua_error ("incorrect arguments to function `min'");
   d = lua_getnumber (o);
   if (d < dmin) dmin = d;
  }
@@ -196,15 +210,15 @@ static void math_max (void)
  int i=1;
  double d, dmax;
  lua_Object o;
- if ((o = lua_getparam(i++)) == NULL)
- { lua_error ("too few arguments to function `max'"); return; }
+ if ((o = lua_getparam(i++)) == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `max'");
  if (!lua_isnumber(o))
- { lua_error ("incorrect arguments to function `max'"); return; }
+   lua_error ("incorrect arguments to function `max'");
  dmax = lua_getnumber (o);
- while ((o = lua_getparam(i++)) != NULL)
+ while ((o = lua_getparam(i++)) != LUA_NOOBJECT)
  {
   if (!lua_isnumber(o))
-  { lua_error ("incorrect arguments to function `max'"); return; }
+    lua_error ("incorrect arguments to function `max'");
   d = lua_getnumber (o);
   if (d > dmax) dmax = d;
  }
@@ -212,6 +226,67 @@ static void math_max (void)
 }
 
 
+static void math_log (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `log'");
+ if (!lua_isnumber(o))
+   lua_error ("incorrect arguments to function `log'");
+ d = lua_getnumber(o);
+ lua_pushnumber (log(d));
+}
+
+
+static void math_log10 (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `log10'");
+ if (!lua_isnumber(o))
+   lua_error ("incorrect arguments to function `log10'");
+ d = lua_getnumber(o);
+ lua_pushnumber (log10(d));
+}
+
+
+static void math_exp (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `exp'");
+ if (!lua_isnumber(o))
+   lua_error ("incorrect arguments to function `exp'");
+ d = lua_getnumber(o);
+ lua_pushnumber (exp(d));
+}
+
+static void math_deg (void)
+{
+ float d;
+ lua_Object o = lua_getparam (1);
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `deg'");
+ if (!lua_isnumber(o))
+   lua_error ("incorrect arguments to function `deg'");
+ d = lua_getnumber(o);
+ lua_pushnumber (d*180./PI);
+}
+
+static void math_rad (void)
+{
+ float d;
+ lua_Object o = lua_getparam (1);
+ if (o == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `rad'");
+ if (!lua_isnumber(o))
+   lua_error ("incorrect arguments to function `rad'");
+ d = lua_getnumber(o);
+ lua_pushnumber (d/180.*PI);
+}
 
 /*
 ** Open math library
@@ -229,7 +304,12 @@ void mathlib_open (void)
  lua_register ("floor", math_floor);
  lua_register ("mod",   math_mod);
  lua_register ("sqrt",  math_sqrt);
- lua_register ("pow",   math_pow);
  lua_register ("min",   math_min);
  lua_register ("max",   math_max);
+ lua_register ("log",   math_log);
+ lua_register ("log10", math_log10);
+ lua_register ("exp",   math_exp);
+ lua_register ("deg",   math_deg);
+ lua_register ("rad",   math_rad);
+ old_pow = lua_lockobject(lua_setfallback("arith", math_pow));
 }
diff --git a/clients/lib/mathlib.h b/clients/lib/mathlib.h
index bdf2b4b8..7630144a 100644
--- a/clients/lib/mathlib.h
+++ b/clients/lib/mathlib.h
@@ -1,7 +1,7 @@
 /*
 ** Math library to LUA
 ** TeCGraf - PUC-Rio
-** $Id: mathlib.h,v 1.1 1993/12/17 18:41:19 celes Exp $
+** $Id: mathlib.h,v 1.1 1993/12/17 18:41:19 celes Stab $
 */
 
 
diff --git a/clients/lib/strlib.c b/clients/lib/strlib.c
index 037b84be..6b92a30b 100644
--- a/clients/lib/strlib.c
+++ b/clients/lib/strlib.c
@@ -3,34 +3,66 @@
 ** String library to LUA
 */
 
-char *rcs_strlib="$Id: strlib.c,v 1.2 1994/03/28 15:14:02 celes Exp $";
+char *rcs_strlib="$Id: strlib.c,v 1.12 1995/02/06 19:37:51 roberto Exp $";
 
-#include <stdlib.h>
 #include <string.h>
+#include <stdlib.h>
 #include <ctype.h>
 
-#include "mm.h"
+#include "lua.h"
+#include "lualib.h"
 
 
-#include "lua.h"
+static char *newstring (lua_Object o)
+{
+  char *s = lua_getstring(o);
+  char *ns = (char *)malloc(strlen(s)+1);
+  if (ns == 0)
+    lua_error("not enough memory for new string");
+  strcpy(ns, s);
+  return ns;
+}
+
 
 /*
 ** Return the position of the first caracter of a substring into a string
 ** LUA interface:
-**			n = strfind (string, substring)
+**			n = strfind (string, substring, init, end)
 */
 static void str_find (void)
 {
  char *s1, *s2, *f;
+ int init; 
  lua_Object o1 = lua_getparam (1);
  lua_Object o2 = lua_getparam (2);
+ lua_Object o3 = lua_getparam (3);
+ lua_Object o4 = lua_getparam (4);
  if (!lua_isstring(o1) || !lua_isstring(o2))
- { lua_error ("incorrect arguments to function `strfind'"); return; }
+   lua_error ("incorrect arguments to function `strfind'");
+ if (o3 == LUA_NOOBJECT)
+  init = 0;
+ else if (lua_isnumber(o3))
+  init = lua_getnumber(o3)-1;
+ else
+ {
+   lua_error ("incorrect arguments to function `strfind'");
+   return;  /* to avoid warnings */
+ }
  s1 = lua_getstring(o1);
  s2 = lua_getstring(o2);
- f = strstr(s1,s2);
+ f = strstr(s1+init,s2);
  if (f != NULL)
-  lua_pushnumber (f-s1+1);
+ {
+  int pos = f-s1+1;
+  if (o4 == LUA_NOOBJECT)
+   lua_pushnumber (pos);
+  else if (!lua_isnumber(o4))
+   lua_error ("incorrect arguments to function `strfind'");
+  else if ((int)lua_getnumber(o4) >= pos+strlen(s2)-1)
+   lua_pushnumber (pos);
+  else
+   lua_pushnil();
+ }
  else
   lua_pushnil();
 }
@@ -44,7 +76,7 @@ static void str_len (void)
 {
  lua_Object o = lua_getparam (1);
  if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlen'"); return; }
+   lua_error ("incorrect arguments to function `strlen'");
  lua_pushnumber(strlen(lua_getstring(o)));
 }
 
@@ -62,20 +94,20 @@ static void str_sub (void)
  lua_Object o2 = lua_getparam (2);
  lua_Object o3 = lua_getparam (3);
  if (!lua_isstring(o1) || !lua_isnumber(o2))
- { lua_error ("incorrect arguments to function `strsub'"); return; }
- if (o3 != NULL && !lua_isnumber(o3))
- { lua_error ("incorrect third argument to function `strsub'"); return; }
- s = lua_copystring(o1);
+   lua_error ("incorrect arguments to function `strsub'");
+ if (o3 != LUA_NOOBJECT && !lua_isnumber(o3))
+   lua_error ("incorrect third argument to function `strsub'");
+ s = newstring(o1);
  start = lua_getnumber (o2);
- end = o3 == NULL ? strlen(s) : lua_getnumber (o3);
+ end = o3 == LUA_NOOBJECT ? strlen(s) : lua_getnumber (o3);
  if (end < start || start < 1 || end > strlen(s))
-  lua_pushstring("");
+  lua_pushliteral("");
  else
  {
   s[end] = 0;
   lua_pushstring (&s[start-1]);
  }
- free (s);
+ free(s);
 }
 
 /*
@@ -88,8 +120,8 @@ static void str_lower (void)
  char *s, *c;
  lua_Object o = lua_getparam (1);
  if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
+   lua_error ("incorrect arguments to function `strlower'");
+ c = s = newstring(o);
  while (*c != 0)
  {
   *c = tolower(*c);
@@ -110,8 +142,8 @@ static void str_upper (void)
  char *s, *c;
  lua_Object o = lua_getparam (1);
  if (!lua_isstring(o))
- { lua_error ("incorrect arguments to function `strlower'"); return; }
- c = s = strdup(lua_getstring(o));
+   lua_error ("incorrect arguments to function `strlower'");
+ c = s = newstring(o);
  while (*c != 0)
  {
   *c = toupper(*c);
diff --git a/clients/lib/strlib.h b/clients/lib/strlib.h
index daa1f603..db3d38c5 100644
--- a/clients/lib/strlib.h
+++ b/clients/lib/strlib.h
@@ -1,7 +1,7 @@
 /*
 ** String library to LUA
 ** TeCGraf - PUC-Rio
-** $Id: strlib.h,v 1.1 1993/12/17 18:41:19 celes Exp $
+** $Id: strlib.h,v 1.1 1993/12/17 18:41:19 celes Stab $
 */
 
 
diff --git a/clients/lua/Makefile b/clients/lua/Makefile
index 7bb74208..10538d67 100644
--- a/clients/lua/Makefile
+++ b/clients/lua/Makefile
@@ -5,13 +5,23 @@ INC= $(LUA)/include
 LIB= $(LUA)/lib
 
 CC= gcc
-CFLAGS= -g -Wall -O2 -I$(INC)
+CFLAGS= $(INCS) $(DEFS) $(WARN) -O2
+
+# in SunOs /usr/5include contains prototypes for standard lib
+INCS= -I/usr/5include -I$(INC)
+WARN= -Wall -Wmissing-prototypes -Wshadow -ansi
 
 OBJS= lua.o
+
 T=$(BIN)/lua
 
 $T: $(OBJS)
 	$(CC) -o $@ $(OBJS) -L$(LIB) -llua -llualib -lm
 
+dynamic:
+
 clean:
 	rm -f $T $(OBJS)
+
+co:
+	co -M lua.c
diff --git a/clients/lua/lua.c b/clients/lua/lua.c
index c4b83cee..19836646 100644
--- a/clients/lua/lua.c
+++ b/clients/lua/lua.c
@@ -3,26 +3,72 @@
 ** Linguagem para Usuarios de Aplicacao
 */
 
-char *rcs_lua="$Id: lua.c,v 1.1 1993/12/17 18:41:19 celes Exp $";
+char *rcs_lua="$Id: lua.c,v 1.4 1995/02/07 16:04:15 lhf Exp $";
 
 #include <stdio.h>
+#include <string.h>
 
 #include "lua.h"
 #include "lualib.h"
 
-void main (int argc, char *argv[])
+static int lua_argc;
+static char **lua_argv;
+
+/*
+%F Allow Lua code to access argv strings.
+%i Receive from Lua the argument number (starting with 1).
+%o Return to Lua the argument, or nil if it does not exist.
+*/
+static void lua_getargv (void)
+{
+ lua_Object lo = lua_getparam(1);
+ if (!lua_isnumber(lo))
+  lua_pushnil();
+ else
+ {
+  int n = (int)lua_getnumber(lo);
+  if (n < 1 || n > lua_argc) lua_pushnil();
+  else                       lua_pushstring(lua_argv[n]);
+ }
+}
+
+
+int main (int argc, char *argv[])
 {
  int i;
+ int result = 0;
  iolib_open ();
  strlib_open ();
  mathlib_open ();
+
+ lua_register("argv", lua_getargv);
+
  if (argc < 2)
  {
-   char buffer[2048];
+   char buffer[250];
    while (gets(buffer) != 0)
-     lua_dostring(buffer);
+     result = lua_dostring(buffer);
  }
  else
-   for (i=1; i<argc; i++)
-    lua_dofile (argv[i]);
+ {
+  for (i=1; i<argc; i++)
+  {
+   if (strcmp(argv[i], "--") == 0)
+   {
+    lua_argc = argc-i-1;
+    lua_argv = argv+i;
+    break;
+   }
+  }
+  for (i=1; i<argc; i++)
+  {
+   if (strcmp(argv[i], "--") == 0)
+    break;
+   else
+    result = lua_dofile (argv[i]);
+  }
+ }
+ return result;
 }
+
+
diff --git a/doc/lua.dvi b/doc/lua.dvi
deleted file mode 100644
index 8aa7404f..00000000
--- a/doc/lua.dvi
+++ /dev/null
diff --git a/doc/lua.ps b/doc/lua.ps
deleted file mode 100644
index 373b082a..00000000
--- a/doc/lua.ps
+++ /dev/null
@@ -1,1774 +0,0 @@
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-(trol,)g(suc)o(h)g(as)g(the)g(ones)45 990 y(used)c(in)g(DOS's)g(batc)o(h)f
-(\014les)h(or)g(in)h(the)f(v)m(arious)g(Unix)h(shells;)-5 1060
-y Fb(\017)25 b Fi(macro)15 b(languages)r Ff(:)21 b(also)15
-b(for)h(automating)g(tasks,)g(but)g(usually)f(only)h(as)f(a)i(sequence)f(of)g
-(primitiv)o(e)45 1120 y(op)q(erations,)f(with)i(no)f(\015o)o(w)g(con)o(trol;)
--5 1190 y Fb(\017)25 b Fi(em)o(b)q(edded)20 b(languages)r Ff(:)29
-b(for)21 b(extending)f(applications)f(with)i(user)f(de\014ned)g(functions)g
-(based)g(on)45 1249 y(primitiv)o(es)h(pro)o(vided)g(b)o(y)h(the)g
-(applications.)38 b(These)22 b(languages)f(are)h(usually)g(quite)g(p)q(o)o(w)
-o(erful,)45 1309 y(b)q(eing)16 b(simpli\014ed)f(v)m(arian)o(ts)g(of)i
-(mainstream)e(programming)e(languages)i(suc)o(h)h(as)g(LISP)g(and)g(C.)-5
-1459 y(What)21 b(mak)o(es)f(em)o(b)q(edded)f(languages)g(di\013eren)o(t)h
-(from)g(standalone)f(languages)g(is)h(that)h(em)o(b)q(edded)-5
-1518 y(languages)c(only)i(w)o(ork)e Fd(emb)m(e)m(dde)m(d)k
-Ff(in)d(a)h(host)f(clien)o(t,)g(called)g(the)h Fd(emb)m(e)m(dding)h
-Ff(program.)26 b(Moreo)o(v)o(er,)-5 1578 y(the)e(host)e(program)f(can)i
-(usually)f(pro)o(vide)g(domain-sp)q(eci\014c)f(extensions)h(to)i(the)f(em)o
-(b)q(edded)f(lan-)-5 1638 y(guage,)16 b(th)o(us)f(creating)h(a)g(v)o(ersion)f
-(of)i(the)f(em)o(b)q(edded)f(language)h(customized)f(for)h(its)g(o)o(wn)g
-(purp)q(oses,)-5 1698 y(p)q(ossibly)g(b)o(y)h(pro)o(viding)f(higher)g(lev)o
-(el)h(abstractions.)22 b(F)l(or)16 b(this,)h(an)g(em)o(b)q(edded)f(language)g
-(has)h(b)q(oth)-5 1758 y(a)h(syn)o(tax)f(for)h(its)f(o)o(wn)g(programs)e(and)
-i(an)h(application)e(program)g(in)o(terface)h(\(API\))i(for)e(in)o(terfacing)
--5 1817 y(with)i(hosts.)30 b(Th)o(us,)18 b(unlik)o(e)g(simpler)g(extension)h
-(languages,)f(whic)o(h)h(are)f(used)h(to)g(supply)f(parame-)-5
-1877 y(ter)i(v)m(alues)g(and)f(sequences)h(of)g(actions)f(to)i(hosts,)f
-(there)f(is)h(a)g(t)o(w)o(o-w)o(a)o(y)e(comm)o(unication)g(b)q(et)o(w)o(een)
--5 1937 y(em)o(b)q(edded)d(languages)f(and)i(host)f(programs.)20
-b(Note)c(that)h(the)f(application)e(programmer)g(in)o(terfaces)-5
-1997 y(with)j(an)g(em)o(b)q(edded)f(language)g(in)h(the)g(mainstream)f
-(language)g(used)g(for)h(host)g(programs,)e(whereas)-5 2056
-y(the)i(user)f(in)o(terfaces)f(with)i(the)g(application)e(using)g(solely)i
-(the)f(em)o(b)q(edded)g(language.)-5 2141 y(LISP)e(has)f(alw)o(a)o(ys)f(b)q
-(een)i(a)g(p)q(opular)e(c)o(hoice)h(for)h(extension)f(languages,)g(for)g(its)
-h(simple,)f(easily)g(parsed)-5 2201 y(syn)o(tax)j(and)g(built-in)f
-(extensibilit)o(y)h(\(Bec)o(kman)g(1991;)g(Nahab)q(o)q(o\).)22
-b(F)l(or)16 b(instance,)f(a)i(ma)s(jor)e(part)h(of)-5 2261
-y(Emacs)h(is)g(actually)g(written)h(in)f(its)g(o)o(wn)g(v)m(arian)o(t)g(of)h
-(LISP;)f(sev)o(eral)f(other)h(text)i(editors)e(follo)o(w)g(the)-5
-2320 y(same)e(path.)22 b(Ho)o(w)o(ev)o(er,)15 b(LISP)h(cannot)f(b)q(e)h
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-2380 y(Neither)f(can)f(C)g(and)g(the)g(shell)g(languages;)f(the)i(latter)f
-(ev)o(en)h(ha)o(v)o(e)e(a)i(more)e(complicated,)h(unfamiliar)-5
-2440 y(syn)o(tax.)-5 2525 y(One)g(of)g(the)h(fundamen)o(tal)d(decisions)h
-(made)g(in)h(the)g(design)f(of)h Fe(Lua)g Ff(w)o(as)f(that)i(it)f(should)f
-(ha)o(v)o(e)g(a)h(clean)-5 2584 y(but)d(familiar)f(syn)o(tax:)20
-b(w)o(e)11 b(quic)o(kly)g(settled)h(for)f(a)g(simpli\014ed)f(P)o(ascal-lik)o
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-2644 y(tax)j(based)f(on)g(LISP)g(or)g(C)h(b)q(ecause)f(it)h(could)f(b)q(e)g
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-2704 y(Th)o(us,)22 b Fe(Lua)f Ff(is)h(primarily)d(a)j(pro)q(cedural)e
-(language.)37 b(Nev)o(ertheless,)22 b(as)g(already)f(men)o(tioned,)g
-Fe(Lua)-5 2764 y Ff(acquired)16 b(data)h(description)e(facilities)h(to)h
-(increase)e(its)i(expression)e(p)q(o)o(w)o(er.)-5 2883 y Fc(T)l(eCGraf/ICAD)
-1674 b(2)p eop
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-Fe(Lua)g Ff(can)-5 1493 y(tak)o(e)j(a)g(v)m(ariable)f(n)o(um)o(b)q(er)e(of)j
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-(returned.)-5 1673 y Fe(Environment)e(and)h(mo)q(dules)-5 1757
-y Ff(All)e(statemen)o(ts)e(in)h Fe(Lua)g Ff(are)g(executed)h(in)f(a)g(global)
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--5 1817 y(all)j(global)f(v)m(ariables)g(and)g(functions,)g(is)h(initialized)f
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-2141 y(function)f(de\014nitions,)f(and)g(ma)o(y)h(b)q(e)g(in)g(a)g(\014le)g
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-2261 y(added)14 b(to)g(the)h(global)f(en)o(vironmen)o(t;)f(then)h(the)g
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 %%Feature: *Resolution 300
 TeXDict begin @a4 /a4 where {pop a4} if
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+-12 2565 V 899 2976 a(22)p eop
+%%Page: 23 23
+bop -12 727 1867 6 v -12 821 a Fl(void)24 b(math_max)e(\(void\))-12
+878 y({)12 934 y(int)i(i=1;)71 b(/*)23 b(number)g(of)h(arguments)e(*/)12
+991 y(double)h(d,)h(dmax;)12 1047 y(lua_Object)f(o;)12 1103
+y(/*)h(the)f(function)g(must)g(get)h(at)f(least)g(one)h(argument)f(*/)12
+1160 y(if)h(\(\(o)f(=)h(lua_getparam\(i++\)\))d(==)j(LUA_NOOBJECT\))60
+1216 y(lua_error)e(\("too)i(few)f(arguments)g(to)g(function)g(`max'"\);)12
+1273 y(/*)h(and)f(this)g(argument)g(must)g(be)h(a)g(number)f(*/)12
+1329 y(if)h(\(!lua_isnumber\(o\)\))60 1386 y(lua_error)e(\("incorrect)h
+(argument)g(to)g(function)g(`max'"\);)12 1442 y(dmax)g(=)h(lua_getnumber)e
+(\(o\);)12 1499 y(/*)i(loops)f(until)g(there)g(is)h(no)f(more)h(arguments)e
+(*/)12 1555 y(while)h(\(\(o)h(=)f(lua_getparam\(i++\)\))f(!=)h
+(LUA_NOOBJECT\))12 1612 y({)36 1668 y(if)h(\(!lua_isnumber\(o\)\))84
+1724 y(lua_error)e(\("incorrect)h(argument)f(to)i(function)f(`max'"\);)36
+1781 y(d)h(=)f(lua_getnumber)f(\(o\);)36 1837 y(if)i(\(d)f(>)h(dmax\))f(dmax)
+g(=)h(d;)12 1894 y(})12 1950 y(/*)g(push)f(the)g(result)g(to)h(be)g(returned)
+e(*/)12 2007 y(lua_pushnumber)g(\(dmax\);)-12 2063 y(})610
+2198 y Fn(Figure)16 b(2:)j(C)c(function)h Fl(math)p 1134 2198
+15 2 v 17 w(max)p Fn(.)p -12 2255 1867 6 v 899 2976 a(23)p
 eop
+%%Page: 24 24
+bop -12 160 a Fo(Ac)n(kno)n(wledgme)o(n)n(ts)-12 261 y Fn(The)17
+b(authors)f(w)o(ould)i(lik)o(e)g(to)e(thank)h(CENPES/PETR)o(OBR)1099
+250 y(\023)1093 261 y(AS)g(whic)o(h,)h(join)o(tly)f(with)h(T)l(eCGraf,)e
+(used)-12 318 y(extensiv)o(ely)g(early)f(v)o(ersions)f(of)g(this)h(system)f
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+(found)h(the)f(name)g(of)g(the)g(game)1371 358 y Fj(3)1390
+374 y Fn(.)-12 517 y Fo(A)69 b(Incompatibi)o(l)o(i)o(ti)o(es)20
+b(with)h(Previous)i(V)-6 b(ersions)-12 619 y Fn(Although)13
+b(great)f(care)g(has)h(b)q(een)g(tak)o(en)f(to)g(a)o(v)o(oid)h
+(incompatibilities)j(with)d(the)f(previous)h(public)i(v)o(ersions)-12
+675 y(of)g(Lua,)g(some)g(di\013erences)h(had)g(to)e(b)q(e)i(in)o(tro)q
+(duced.)21 b(Here)16 b(is)f(a)g(list)h(of)f(all)h(these)g(di\013erences.)-12
+797 y Fd(Incompatibilitie)o(s)g(in)i(the)h(Language)56 883
+y Fi(\017)k Fn(The)15 b(equalit)o(y)h(test)f(op)q(erator)f(no)o(w)h(is)h
+(denoted)f(b)o(y)g Fl(==)p Fn(,)g(instead)h(of)f Fl(=)p Fn(.)56
+976 y Fi(\017)23 b Fn(The)14 b(syn)o(tax)f(for)g(table)h(construction)g(has)f
+(b)q(een)i(greatly)f(simpli\014ed.)22 b(The)14 b(old)g Fl(@\(size\))f
+Fn(has)g(b)q(een)102 1033 y(substituted)20 b(b)o(y)f Fl({})p
+Fn(.)32 b(The)20 b(list)g(constructor)f(\(formerly)g Fl(@[...])p
+Fn(\))f(and)h(the)h(record)f(constructor)102 1089 y(\(formerly)g
+Fl(@{...})p Fn(\))g(no)o(w)h(are)g(b)q(oth)g(co)q(ded)h(lik)o(e)g
+Fl({...})p Fn(.)34 b(When)20 b(the)h(construction)f(in)o(v)o(olv)o(es)h(a)102
+1146 y(function)15 b(call,)h(lik)o(e)g(in)f Fl(@func{...})p
+Fn(,)e(the)i(new)g(syn)o(tax)f(do)q(es)h(not)g(use)g(the)f
+Fl(@)p Fn(.)20 b(More)14 b(imp)q(ortan)o(t,)g Fm(a)102 1202
+y(c)n(onstruction)h(function)h(must)h(now)f(explicitly)g(r)n(eturn)g(the)h(c)
+n(onstructe)n(d)e(table)p Fn(.)-12 1324 y Fd(Incompatibilitie)o(s)h(in)i(the)
+h(API)56 1410 y Fi(\017)k Fn(The)15 b(function)h Fl(lua_call)e
+Fn(no)h(longer)h(has)f(the)g(parameter)g Fl(nparam)p Fn(.)56
+1504 y Fi(\017)23 b Fn(The)16 b(function)i Fl(lua_pop)d Fn(is)i(no)f(longer)h
+(a)o(v)m(ailable,)h(since)g(it)e(could)i(lead)f(to)f(strange)g(b)q(eha)o
+(vior.)24 b(In)102 1560 y(particular,)13 b(to)e(access)i(results)f(returned)h
+(from)e(a)h(Lua)h(function,)g(the)f(new)h(macro)e Fl(lua_getresult)102
+1617 y Fn(should)16 b(b)q(e)g(used.)56 1710 y Fi(\017)23 b
+Fn(The)15 b(old)h(functions)g Fl(lua_storefield)d Fn(and)j
+Fl(lua_storeindexed)d Fn(ha)o(v)o(e)h(b)q(een)j(replaced)f(b)o(y)102
+1823 y Fl(int)23 b(lua_storesubscript)f(\(void\);)102 1935
+y Fn(with)15 b(the)h(parameters)e(explicitly)k(pushed)e(on)f(the)h(stac)o(k.)
+56 2029 y Fi(\017)23 b Fn(The)16 b(functionalit)o(y)h(of)f(the)g(function)g
+Fl(lua_errorfunction)e Fn(has)i(b)q(een)h(replaced)g(b)o(y)f(the)g
+Fm(fal)r(lb)n(ack)102 2086 y Fn(mec)o(hanism;)f(see)h(Section)g(4.8.)56
+2179 y Fi(\017)23 b Fn(When)14 b(calling)i(a)d(function)i(from)e(the)h(Lua)g
+(library)l(,)g(parameters)f(passed)h(through)g(the)g(stac)o(k)f(m)o(ust)102
+2236 y(b)q(e)j(pushed)h(just)e(b)q(efore)h(the)f(corresp)q(onden)o(t)h(call,)
+h(with)f(no)f(in)o(termediate)h(calls)h(to)e(Lua.)21 b(Sp)q(ecial)102
+2292 y(care)15 b(should)h(b)q(e)g(tak)o(en)f(with)g(macros)g(lik)o(e)h
+Fl(lua_getindexed)d Fn(and)j Fl(lua_getfield)p Fn(.)p -12 2815
+747 2 v 40 2842 a Fh(3)57 2858 y Fg(BTW,)d(Lua)g(means)h Fe(mo)n(on)e
+Fg(in)i(P)o(ortuguese.)899 2976 y Fn(24)p eop
 %%Trailer
 end
 userdict /end-hook known{end-hook}if
diff --git a/domake b/domake
index 3acff092..56d58250 100755
--- a/domake
+++ b/domake
@@ -1,6 +1,10 @@
 #!/bin/sh
+# makefile for lua hierarchy
 
 LUA=`pwd`
 export LUA
 
-make $*
+cd $LUA/src; make $*
+cd $LUA/include; make $*
+cd $LUA/clients/lib; make $*
+cd $LUA/clients/lua; make $*
diff --git a/include/Makefile b/include/Makefile
new file mode 100644
index 00000000..5ef4d4b5
--- /dev/null
+++ b/include/Makefile
@@ -0,0 +1,8 @@
+# makefile for lua distribution
+
+all:
+
+clean:
+
+co:
+	co -M lua.h lualib.h
diff --git a/include/lua.h b/include/lua.h
index 2bafd209..09a0909e 100644
--- a/include/lua.h
+++ b/include/lua.h
@@ -2,53 +2,99 @@
 ** LUA - Linguagem para Usuarios de Aplicacao
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: lua.h,v 1.1 1993/12/17 18:41:19 celes Exp $
+** $Id: lua.h,v 3.16 1995/01/27 17:19:06 celes Exp $
 */
 
 
 #ifndef lua_h
 #define lua_h
 
-typedef void (*lua_CFunction) (void);
-typedef struct Object *lua_Object;
+/* Private Part */
+ 
+typedef enum
+{
+ LUA_T_NIL	= -1,
+ LUA_T_NUMBER	= -2,
+ LUA_T_STRING	= -3,
+ LUA_T_ARRAY	= -4,
+ LUA_T_FUNCTION	= -5,
+ LUA_T_CFUNCTION= -6,
+ LUA_T_USERDATA = 0
+} lua_Type;
+ 
 
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+/* Public Part */
+
+#define LUA_NOOBJECT  0
 
+typedef void (*lua_CFunction) (void);
+typedef unsigned int lua_Object;
+
+lua_Object     lua_setfallback		(char *name, lua_CFunction fallback);
 
-void           lua_errorfunction    	(void (*fn) (char *s));
 void           lua_error		(char *s);
 int            lua_dofile 		(char *filename);
 int            lua_dostring 		(char *string);
-int            lua_call 		(char *functionname, int nparam);
+int            lua_callfunction		(lua_Object function);
+int	       lua_call			(char *funcname);
+
+void	       lua_beginblock		(void);
+void	       lua_endblock		(void);
 
 lua_Object     lua_getparam 		(int number);
+#define	       lua_getresult(_)		lua_getparam(_)
+
 float          lua_getnumber 		(lua_Object object);
 char          *lua_getstring 		(lua_Object object);
-char 	      *lua_copystring 		(lua_Object object);
 lua_CFunction  lua_getcfunction 	(lua_Object object);
 void          *lua_getuserdata  	(lua_Object object);
-lua_Object     lua_getfield         	(lua_Object object, char *field);
-lua_Object     lua_getindexed         	(lua_Object object, float index);
+
+void 	       lua_pushnil 		(void);
+void           lua_pushnumber 		(float n);
+void           lua_pushstring 		(char *s);
+void           lua_pushliteral 		(char *s);
+void           lua_pushcfunction	(lua_CFunction fn);
+void           lua_pushusertag     	(void *u, int tag);
+void           lua_pushobject       	(lua_Object object);
+
 lua_Object     lua_getglobal 		(char *name);
+void           lua_storeglobal		(char *name);
+
+void           lua_storesubscript	(void);
+lua_Object     lua_getsubscript         (void);
+
+int            lua_type 		(lua_Object object);
+
+int	       lua_lock			(void);
+lua_Object     lua_getlocked		(int ref);
+void	       lua_pushlocked		(int ref);
+void	       lua_unlock		(int ref);
+
+lua_Object     lua_createtable		(void);
+
+
+/* some useful macros */
+
+#define lua_lockobject(o)  (lua_pushobject(o), lua_lock())
+
+#define lua_register(n,f)	(lua_pushcfunction(f), lua_storeglobal(n))
+
+#define lua_pushuserdata(u)     lua_pushusertag(u, LUA_T_USERDATA)
+
+#define lua_isnil(_)            (lua_type(_)==LUA_T_NIL)
+#define lua_isnumber(_)         (lua_type(_)==LUA_T_NUMBER)
+#define lua_isstring(_)         (lua_type(_)==LUA_T_STRING)
+#define lua_istable(_)          (lua_type(_)==LUA_T_ARRAY)
+#define lua_isfunction(_)       (lua_type(_)==LUA_T_FUNCTION)
+#define lua_iscfunction(_)      (lua_type(_)==LUA_T_CFUNCTION)
+#define lua_isuserdata(_)       (lua_type(_)>=LUA_T_USERDATA)
+
+
+/* for lua 1.1 compatibility. Avoid using these macros */
+
+#define lua_getindexed(o,n) (lua_pushobject(o), lua_pushnumber(n), lua_getsubscript())
+#define lua_getfield(o,f)   (lua_pushobject(o), lua_pushliteral(f), lua_getsubscript())
 
-lua_Object     lua_pop 			(void);
-
-int 	       lua_pushnil 		(void);
-int            lua_pushnumber 		(float n);
-int            lua_pushstring 		(char *s);
-int            lua_pushcfunction	(lua_CFunction fn);
-int            lua_pushuserdata     	(void *u);
-int            lua_pushobject       	(lua_Object object);
-
-int            lua_storeglobal		(char *name);
-int            lua_storefield		(lua_Object object, char *field);
-int            lua_storeindexed		(lua_Object object, float index);
-
-int            lua_isnil 		(lua_Object object);
-int            lua_isnumber 		(lua_Object object);
-int            lua_isstring 		(lua_Object object);
-int            lua_istable          	(lua_Object object);
-int            lua_iscfunction 		(lua_Object object);
-int            lua_isuserdata 		(lua_Object object);
+#define lua_copystring(o) (strdup(lua_getstring(o)))
 
 #endif
diff --git a/include/lualib.h b/include/lualib.h
index 37b23094..9ce7e44a 100644
--- a/include/lualib.h
+++ b/include/lualib.h
@@ -2,7 +2,7 @@
 ** Libraries to be used in LUA programs
 ** Grupo de Tecnologia em Computacao Grafica
 ** TeCGraf - PUC-Rio
-** $Id: lualib.h,v 1.1 1993/12/17 19:01:46 celes Exp $
+** $Id: lualib.h,v 1.3 1994/12/13 15:59:16 roberto Exp $
 */
 
 #ifndef lualib_h
diff --git a/include/mm.h b/include/mm.h
deleted file mode 100644
index e69de29b..00000000
--- a/include/mm.h
+++ /dev/null
diff --git a/src/Makefile b/src/Makefile
index 7e833d4f..6d1f1bb1 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,24 +1,35 @@
-# makefile for lua
+# makefile for lua distribution
 
-LIB= $(LUA)/lib
 INC= $(LUA)/include
+LIB= $(LUA)/lib
+
+# in SunOs /usr/5include contains prototypes for standard lib
+INCS= -I/usr/5include -I$(INC)
+WARN= -Wall -Wmissing-prototypes -Wshadow -ansi
 
 CC= gcc
-CFLAGS= -g -Wall -O2 -I$(INC) $(DEFS)
-DEFS= -DMAXCODE=64000 -DMAXCONSTANT=1024 -DMAXSYMBOL=1024 -DMAXARRAY=1024
+CFLAGS= $(INCS) $(DEFS) $(WARN) -O2
+
+OBJS= fallback.o hash.o inout.o lex.o mem.o opcode.o parser.o table.o tree.o
 
-OBJS= hash.o inout.o lex.o opcode.o table.o y.tab.o
 SLIB= $(LIB)/liblua.a
-DLIB= $(LIB)/liblua.so.1.1
 
-libs: $(SLIB) $(DLIB)
+# dynamic libraries only work for SunOs
+DLIB= $(LIB)/liblua.so.2.1
+
+all: $(SLIB)
+
+dynamic: $(DLIB)
 
 $(SLIB): $(OBJS)
-	ar ruvl $@ $(OBJS)
-	ranlib $(SLIB)
+	ar rcuv $@ $(OBJS)
+	ranlib $@
 
 $(DLIB): $(OBJS)
 	ld -o $@ $(OBJS)
 
 clean:
 	rm -f $(OBJS) $(SLIB) $(DLIB)
+
+co:
+	co -M fallback.c hash.c inout.c lex.c mem.c opcode.c table.c tree.c fallback.h hash.h inout.h mem.h opcode.h table.h tree.h types.h ugly.h
diff --git a/src/fallback.c b/src/fallback.c
new file mode 100644
index 00000000..d5bbbba1
--- /dev/null
+++ b/src/fallback.c
@@ -0,0 +1,171 @@
+/*
+** fallback.c
+** TecCGraf - PUC-Rio
+*/
+ 
+char *rcs_fallback="$Id: fallback.c,v 1.11 1995/02/06 19:34:03 roberto Exp $";
+
+#include <stdio.h>
+#include <string.h>
+ 
+#include "mem.h"
+#include "fallback.h"
+#include "opcode.h"
+#include "inout.h"
+#include "lua.h"
+
+
+static void errorFB (void);
+static void indexFB (void);
+static void gettableFB (void);
+static void arithFB (void);
+static void concatFB (void);
+static void orderFB (void);
+static void GDFB (void);
+static void funcFB (void);
+
+
+/*
+** Warning: This list must be in the same order as the #define's
+*/
+struct FB  luaI_fallBacks[] = {
+{"error", {LUA_T_CFUNCTION, errorFB}},
+{"index", {LUA_T_CFUNCTION, indexFB}},
+{"gettable", {LUA_T_CFUNCTION, gettableFB}},
+{"arith", {LUA_T_CFUNCTION, arithFB}},
+{"order", {LUA_T_CFUNCTION, orderFB}},
+{"concat", {LUA_T_CFUNCTION, concatFB}},
+{"settable", {LUA_T_CFUNCTION, gettableFB}},
+{"gc", {LUA_T_CFUNCTION, GDFB}},
+{"function", {LUA_T_CFUNCTION, funcFB}}
+};
+
+#define N_FB  (sizeof(luaI_fallBacks)/sizeof(struct FB))
+
+void luaI_setfallback (void)
+{
+  int i;
+  char *name = lua_getstring(lua_getparam(1));
+  lua_Object func = lua_getparam(2);
+  if (name == NULL || !(lua_isfunction(func) || lua_iscfunction(func)))
+  {
+    lua_pushnil();
+    return;
+  }
+  for (i=0; i<N_FB; i++)
+  {
+    if (strcmp(luaI_fallBacks[i].kind, name) == 0)
+    {
+      luaI_pushobject(&luaI_fallBacks[i].function);
+      luaI_fallBacks[i].function = *luaI_Address(func);
+      return;
+    }
+  }
+  /* name not found */
+  lua_pushnil();
+}
+
+
+static void errorFB (void)
+{
+  lua_Object o = lua_getparam(1);
+  if (lua_isstring(o))
+    fprintf (stderr, "lua: %s\n", lua_getstring(o));
+  else
+    fprintf(stderr, "lua: unknown error\n");
+}
+ 
+
+static void indexFB (void)
+{
+  lua_pushnil();
+}
+ 
+
+static void gettableFB (void)
+{
+  lua_reportbug("indexed expression not a table");
+}
+ 
+
+static void arithFB (void)
+{
+  lua_reportbug("unexpected type at conversion to number");
+}
+
+static void concatFB (void)
+{
+  lua_reportbug("unexpected type at conversion to string");
+}
+
+
+static void orderFB (void)
+{
+  lua_reportbug("unexpected type at comparison");
+}
+
+static void GDFB (void) { }
+
+static void funcFB (void)
+{
+  lua_reportbug("call expression not a function");
+}
+
+
+/*
+** Lock routines
+*/
+
+static Object *lockArray = NULL;
+static Word lockSize = 0;
+
+int luaI_lock (Object *object)
+{
+  Word i;
+  Word oldSize;
+  if (tag(object) == LUA_T_NIL)
+    return -1;
+  for (i=0; i<lockSize; i++)
+    if (tag(&lockArray[i]) == LUA_T_NIL)
+    {
+      lockArray[i] = *object;
+      return i;
+    }
+  /* no more empty spaces */
+  oldSize = lockSize;
+  if (lockArray == NULL)
+  {
+    lockSize = 10;
+    lockArray = newvector(lockSize, Object);
+  }
+  else
+  {
+    lockSize = 3*oldSize/2 + 5;
+    lockArray = growvector(lockArray, lockSize, Object);
+  }
+  for (i=oldSize; i<lockSize; i++)
+    tag(&lockArray[i]) = LUA_T_NIL;
+  lockArray[oldSize] = *object;
+  return oldSize;
+}
+
+
+void lua_unlock (int ref)
+{
+  tag(&lockArray[ref]) = LUA_T_NIL;
+}
+
+
+Object *luaI_getlocked (int ref)
+{
+  return &lockArray[ref];
+}
+
+
+void luaI_travlock (void (*fn)(Object *))
+{
+  Word i;
+  for (i=0; i<lockSize; i++)
+    fn(&lockArray[i]);
+}
+
diff --git a/src/fallback.h b/src/fallback.h
new file mode 100644
index 00000000..225a9063
--- /dev/null
+++ b/src/fallback.h
@@ -0,0 +1,31 @@
+/*
+** $Id: fallback.h,v 1.7 1994/11/21 18:22:58 roberto Stab $
+*/
+ 
+#ifndef fallback_h
+#define fallback_h
+
+#include "opcode.h"
+
+extern struct FB {
+  char *kind;
+  Object function;
+} luaI_fallBacks[];
+
+#define FB_ERROR  0
+#define FB_INDEX  1
+#define FB_GETTABLE  2
+#define FB_ARITH  3
+#define FB_ORDER  4
+#define FB_CONCAT  5
+#define FB_SETTABLE  6
+#define FB_GC 7
+#define FB_FUNCTION 8
+
+void luaI_setfallback (void);
+int luaI_lock (Object *object);
+Object *luaI_getlocked (int ref);
+void luaI_travlock (void (*fn)(Object *));
+
+#endif
+
diff --git a/src/hash.c b/src/hash.c
index 287c1316..2f227d25 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -1,138 +1,147 @@
 /*
 ** hash.c
 ** hash manager for lua
-** Luiz Henrique de Figueiredo - 17 Aug 90
 */
 
-char *rcs_hash="$Id: hash.c,v 2.1 1994/04/20 22:07:57 celes Exp $";
+char *rcs_hash="$Id: hash.c,v 2.24 1995/02/06 19:34:03 roberto Exp $";
 
 #include <string.h>
-#include <stdlib.h>
-
-#include "mm.h"
 
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
 #include "lua.h"
 
-#define streq(s1,s2)	(strcmp(s1,s2)==0)
-#define strneq(s1,s2)	(strcmp(s1,s2)!=0)
-
-#define new(s)		((s *)malloc(sizeof(s)))
-#define newvector(n,s)	((s *)calloc(n,sizeof(s)))
+#define streq(s1,s2)	(s1 == s2 || (*(s1) == *(s2) && strcmp(s1,s2)==0))
 
 #define nhash(t)	((t)->nhash)
-#define nodelist(t)	((t)->list)
-#define list(t,i)	((t)->list[i])
+#define nuse(t)		((t)->nuse)
 #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))
+#define nodevector(t)	((t)->node)
+#define node(t,i)	(&(t)->node[i])
+#define ref(n)		(&(n)->ref)
+#define val(n)		(&(n)->val)
 
-#ifndef ARRAYBLOCK
-#define ARRAYBLOCK 50
-#endif
 
-typedef struct ArrayList
-{
- Hash *array;
- struct ArrayList *next;
-} ArrayList;
+#define REHASH_LIMIT	0.70	/* avoid more than this % full */
+
 
-static ArrayList *listhead = NULL;
+static Hash *listhead = NULL;
 
-static int head (Hash *t, Object *ref)		/* hash function */
+
+
+/* hash dimensions values */
+static Word dimensions[] = 
+ {3, 5, 7, 11, 23, 47, 97, 197, 397, 797, 1597, 3203, 6421,
+  12853, 25717, 51437, 65521, 0};  /* 65521 == last prime < MAX_WORD */
+
+static Word redimension (Word nhash)
 {
- if (tag(ref) == T_NUMBER) return (((int)nvalue(ref))%nhash(t));
- else if (tag(ref) == T_STRING)
+ Word i;
+ for (i=0; dimensions[i]!=0; i++)
  {
-  int h;
-  char *name = svalue(ref);
-  for (h=0; *name!=0; name++)		/* interpret name as binary number */
-  {
-   h <<= 8;
-   h  += (unsigned char) *name;		/* avoid sign extension */
-   h  %= nhash(t);			/* make it a valid index */
-  }
-  return h;
- }
- else
- {
-  lua_reportbug ("unexpected type to index table");
-  return -1;
+  if (dimensions[i] > nhash)
+   return dimensions[i];
  }
+ lua_error("table overflow");
+ return 0;  /* to avoid warnings */
 }
 
-static Node *present(Hash *t, Object *ref, int h)
+static Word hashindex (Hash *t, Object *ref)		/* hash function */
 {
- Node *n=NULL, *p;
- if (tag(ref) == T_NUMBER)
- {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_NUMBER && nvalue(ref) == ref_nvalue(n)) break;
- }  
- else if (tag(ref) == T_STRING)
- {
-  for (p=NULL,n=list(t,h); n!=NULL; p=n, n=n->next)
-   if (ref_tag(n) == T_STRING && streq(svalue(ref),ref_svalue(n))) break;
- }  
- if (n==NULL)				/* name not present */
-  return NULL;
-#if 0
- if (p!=NULL)				/* name present but not first */
+ switch (tag(ref))
  {
-  p->next=n->next;			/* move-to-front self-organization */
-  n->next=list(t,h);
-  list(t,h)=n;
+  case LUA_T_NIL:
+   lua_reportbug ("unexpected type to index table");
+   return -1;  /* UNREACHEABLE */
+  case LUA_T_NUMBER:
+   return (((Word)nvalue(ref))%nhash(t));
+  case LUA_T_STRING:
+  {
+   unsigned long h = tsvalue(ref)->hash;
+   if (h == 0)
+   {
+     char *name = svalue(ref);
+     while (*name)
+       h = ((h<<5)-h)^(unsigned char)*(name++);
+     tsvalue(ref)->hash = h;
+   }
+   return (Word)h%nhash(t);  /* make it a valid index */
+  }
+  case LUA_T_FUNCTION:
+   return (((IntPoint)bvalue(ref))%nhash(t));
+  case LUA_T_CFUNCTION:
+   return (((IntPoint)fvalue(ref))%nhash(t));
+  case LUA_T_ARRAY:
+   return (((IntPoint)avalue(ref))%nhash(t));
+  default:  /* user data */
+   return (((IntPoint)uvalue(ref))%nhash(t));
  }
-#endif
- return n;
 }
 
-static void freelist (Node *n)
+Bool lua_equalObj (Object *t1, Object *t2)
 {
- while (n)
+  if (tag(t1) != tag(t2)) return 0;
+  switch (tag(t1))
+  {
+    case LUA_T_NIL: return 1;
+    case LUA_T_NUMBER: return nvalue(t1) == nvalue(t2);
+    case LUA_T_STRING: return streq(svalue(t1), svalue(t2));
+    case LUA_T_ARRAY: return avalue(t1) == avalue(t2);
+    case LUA_T_FUNCTION: return bvalue(t1) == bvalue(t2);
+    case LUA_T_CFUNCTION: return fvalue(t1) == fvalue(t2);
+    default: return uvalue(t1) == uvalue(t2);
+  }
+}
+
+static Word present (Hash *t, Object *ref)
+{ 
+ Word h = hashindex(t, ref);
+ while (tag(ref(node(t, h))) != LUA_T_NIL)
  {
-  Node *next = n->next;
-  free (n);
-  n = next;
+  if (lua_equalObj(ref, ref(node(t, h))))
+    return h;
+  h = (h+1) % nhash(t);
  }
+ return h;
+}
+
+
+/*
+** Alloc a vector node 
+*/
+static Node *hashnodecreate (Word nhash)
+{
+ Word i;
+ Node *v = newvector (nhash, Node);
+ for (i=0; i<nhash; i++)
+   tag(ref(&v[i])) = LUA_T_NIL;
+ return v;
 }
 
 /*
 ** Create a new hash. Return the hash pointer or NULL on error.
 */
-static Hash *hashcreate (unsigned int nhash)
+static Hash *hashcreate (Word nhash)
 {
- Hash *t = new (Hash);
- if (t == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
+ Hash *t = new(Hash);
+ nhash = redimension((Word)((float)nhash/REHASH_LIMIT));
+ nodevector(t) = hashnodecreate(nhash);
  nhash(t) = nhash;
+ nuse(t) = 0;
  markarray(t) = 0;
- nodelist(t) = newvector (nhash, Node*);
- if (nodelist(t) == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
  return t;
 }
 
 /*
 ** Delete a hash
 */
-static void hashdelete (Hash *h)
+static void hashdelete (Hash *t)
 {
- int i;
- for (i=0; i<nhash(h); i++)
-  freelist (list(h,i));
- free (nodelist(h));
- free(h);
+ luaI_free (nodevector(t));
+ luaI_free(t);
 }
 
 
@@ -143,12 +152,12 @@ void lua_hashmark (Hash *h)
 {
  if (markarray(h) == 0)
  {
-  int i;
+  Word i;
   markarray(h) = 1;
   for (i=0; i<nhash(h); i++)
   {
-   Node *n;
-   for (n = list(h,i); n != NULL; n = n->next)
+   Node *n = node(h,i);
+   if (tag(ref(n)) != LUA_T_NIL)
    {
     lua_markobject(&n->ref);
     lua_markobject(&n->val);
@@ -156,92 +165,125 @@ void lua_hashmark (Hash *h)
   }
  } 
 }
+
+
+static void call_fallbacks (void)
+{
+  Hash *curr_array;
+  Object t;
+  tag(&t) = LUA_T_ARRAY;
+  for (curr_array = listhead; curr_array; curr_array = curr_array->next)
+    if (markarray(curr_array) != 1)
+    {
+      avalue(&t) = curr_array;
+      luaI_gcFB(&t);
+    }
+  tag(&t) = LUA_T_NIL;
+  luaI_gcFB(&t);  /* end of list */
+}
+
  
 /*
 ** Garbage collection to arrays
 ** Delete all unmarked arrays.
 */
-void lua_hashcollector (void)
+Long lua_hashcollector (void)
 {
- ArrayList *curr = listhead, *prev = NULL;
- while (curr != NULL)
+ Hash *curr_array = listhead, *prev = NULL;
+ Long counter = 0;
+ call_fallbacks();
+ while (curr_array != NULL)
  {
-  ArrayList *next = curr->next;
-  if (markarray(curr->array) != 1)
+  Hash *next = curr_array->next;
+  if (markarray(curr_array) != 1)
   {
    if (prev == NULL) listhead = next;
    else              prev->next = next;
-   hashdelete(curr->array);
-   free(curr);
+   hashdelete(curr_array);
+   ++counter;
   }
   else
   {
-   markarray(curr->array) = 0;
-   prev = curr;
+   markarray(curr_array) = 0;
+   prev = curr_array;
   }
-  curr = next;
+  curr_array = next;
  }
+ return counter;
 }
 
 
 /*
 ** Create a new array
-** This function insert the new array at array list. It also
-** execute garbage collection if the number of array created
+** This function inserts the new array in the array list. It also
+** executes garbage collection if the number of arrays created
 ** exceed a pre-defined range.
 */
-Hash *lua_createarray (int nhash)
+Hash *lua_createarray (Word nhash)
 {
- ArrayList *new = new(ArrayList);
- if (new == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- new->array = hashcreate(nhash);
- if (new->array == NULL)
+ Hash *array;
+ lua_pack();
+ array = hashcreate(nhash);
+ array->next = listhead;
+ listhead = array;
+ return array;
+}
+
+
+/*
+** Re-hash
+*/
+static void rehash (Hash *t)
+{
+ Word i;
+ Word   nold = nhash(t);
+ Node *vold = nodevector(t);
+ nhash(t) = redimension(nhash(t));
+ nodevector(t) = hashnodecreate(nhash(t));
+ for (i=0; i<nold; i++)
  {
-  lua_error ("not enough memory");
-  return NULL;
+  Node *n = vold+i;
+  if (tag(ref(n)) != LUA_T_NIL && tag(val(n)) != LUA_T_NIL)
+   *node(t, present(t, ref(n))) = *n;  /* copy old node to new hahs */
  }
+ luaI_free(vold);
+}
 
- if (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 return
+** null.
+*/
+Object *lua_hashget (Hash *t, Object *ref)
+{
+ Word h = present(t, ref);
+ if (tag(ref(node(t, h))) != LUA_T_NIL) return val(node(t, h));
+ else return NULL;
 }
 
 
 /*
 ** If the hash node is present, return its pointer, otherwise create a new
 ** node for the given reference and also return its pointer.
-** On error, return NULL.
 */
 Object *lua_hashdefine (Hash *t, Object *ref)
 {
- int   h;
+ Word   h;
  Node *n;
- h = head (t, ref);
- if (h < 0) return NULL; 
- 
- n = present(t, ref, h);
- if (n == NULL)
+ h = present(t, ref);
+ n = node(t, h);
+ if (tag(ref(n)) == LUA_T_NIL)
  {
-  n = new(Node);
-  if (n == NULL)
+  nuse(t)++;
+  if ((float)nuse(t) > (float)nhash(t)*REHASH_LIMIT)
   {
-   lua_error ("not enough memory");
-   return NULL;
+   rehash(t);
+   h = present(t, ref);
+   n = node(t, h);
   }
-  n->ref = *ref;
-  tag(&n->val) = T_NIL;
-  n->next = list(t,h);			/* link node to head of list */
-  list(t,h) = n;
+  *ref(n) = *ref;
+  tag(val(n)) = LUA_T_NIL;
  }
- return (&n->val);
+ return (val(n));
 }
 
 
@@ -251,97 +293,44 @@ Object *lua_hashdefine (Hash *t, Object *ref)
 ** in the hash.
 ** This function pushs the element value and its reference to the stack.
 */
-static void firstnode (Hash *a, int h)
+static void hashnext (Hash *t, Word i)
 {
- if (h < nhash(a))
- {  
-  int i;
-  for (i=h; i<nhash(a); i++)
+ if (i >= nhash(t))
+ {
+  lua_pushnil(); lua_pushnil();
+  return;
+ }
+ while (tag(ref(node(t,i))) == LUA_T_NIL || tag(val(node(t,i))) == LUA_T_NIL)
+ {
+  if (++i >= nhash(t))
   {
-   if (list(a,i) != NULL)
-   {
-    if (tag(&list(a,i)->val) != T_NIL)
-    {
-     lua_pushobject (&list(a,i)->ref);
-     lua_pushobject (&list(a,i)->val);
-     return;
-    }
-    else
-    {
-     Node *next = list(a,i)->next;
-     while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-     if (next != NULL)
-     {
-      lua_pushobject (&next->ref);
-      lua_pushobject (&next->val);
-      return;
-     }
-    }
-   }
+   lua_pushnil(); lua_pushnil();
+   return;
   }
  }
- lua_pushnil();
- lua_pushnil();
+ luaI_pushobject(ref(node(t,i)));
+ luaI_pushobject(val(node(t,i)));
 }
+
 void lua_next (void)
 {
- Hash   *a;
- Object *o = lua_getparam (1);
- Object *r = lua_getparam (2);
- if (o == NULL || r == NULL)
- { lua_error ("too few arguments to function `next'"); return; }
- if (lua_getparam (3) != NULL)
- { lua_error ("too many arguments to function `next'"); return; }
- if (tag(o) != T_ARRAY)
- { lua_error ("first argument of function `next' is not a table"); return; }
- a = avalue(o);
- if (tag(r) == T_NIL)
+ Hash   *t;
+ lua_Object o = lua_getparam(1);
+ lua_Object r = lua_getparam(2);
+ if (o == LUA_NOOBJECT || r == LUA_NOOBJECT)
+   lua_error ("too few arguments to function `next'");
+ if (lua_getparam(3) != LUA_NOOBJECT)
+   lua_error ("too many arguments to function `next'");
+ if (!lua_istable(o))
+   lua_error ("first argument of function `next' is not a table");
+ t = avalue(luaI_Address(o));
+ if (lua_isnil(r))
  {
-  firstnode (a, 0);
-  return;
+  hashnext(t, 0);
  }
  else
  {
-  int h = head (a, r);
-  if (h >= 0)
-  {
-   Node *n = list(a,h);
-   while (n)
-   {
-    if (memcmp(&n->ref,r,sizeof(Object)) == 0)
-    {
-     if (n->next == NULL)
-     {
-      firstnode (a, h+1);
-      return;
-     }
-     else if (tag(&n->next->val) != T_NIL)
-     {
-      lua_pushobject (&n->next->ref);
-      lua_pushobject (&n->next->val);
-      return;
-     }
-     else
-     {
-      Node *next = n->next->next;
-      while (next != NULL && tag(&next->val) == T_NIL) next = next->next;
-      if (next == NULL)
-      {
-       firstnode (a, h+1);
-       return;
-      }
-      else
-      {
-       lua_pushobject (&next->ref);
-       lua_pushobject (&next->val);
-      }
-      return;
-     }
-    }
-    n = n->next;
-   }
-   if (n == NULL)
-    lua_error ("error in function 'next': reference not found");
-  }
+  Word h = present (t, luaI_Address(r));
+  hashnext(t, h+1);
  }
 }
diff --git a/src/hash.h b/src/hash.h
index 060031a5..2af6ce16 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -2,30 +2,35 @@
 ** hash.h
 ** hash manager for lua
 ** Luiz Henrique de Figueiredo - 17 Aug 90
-** $Id: hash.h,v 2.1 1994/04/20 22:07:57 celes Exp $
+** $Id: hash.h,v 2.8 1995/01/12 14:19:04 roberto Exp $
 */
 
 #ifndef hash_h
 #define hash_h
 
+#include "types.h"
+
 typedef struct node
 {
  Object ref;
  Object val;
- struct node *next;
 } Node;
 
 typedef struct Hash
 {
+ struct Hash   *next;
  char           mark;
- unsigned int   nhash;
- Node         **list;
+ Word          nhash;
+ Word           nuse;
+ Node          *node;
 } Hash;
 
 
-Hash    *lua_createarray (int nhash);
+Bool     lua_equalObj (Object *t1, Object *t2);
+Hash    *lua_createarray (Word nhash);
 void     lua_hashmark (Hash *h);
-void     lua_hashcollector (void);
+Long     lua_hashcollector (void);
+Object  *lua_hashget (Hash *t, Object *ref);
 Object 	*lua_hashdefine (Hash *t, Object *ref);
 void     lua_next (void);
 
diff --git a/src/inout.c b/src/inout.c
index d985c1b7..7bd7c235 100644
--- a/src/inout.c
+++ b/src/inout.c
@@ -2,49 +2,54 @@
 ** inout.c
 ** Provide function to realise the input/output function and debugger 
 ** facilities.
+** Also provides some predefined lua functions.
 */
 
-char *rcs_inout="$Id: inout.c,v 1.2 1993/12/22 21:15:16 roberto Exp $";
+char *rcs_inout="$Id: inout.c,v 2.16 1994/12/20 21:20:36 roberto Exp $";
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
+#include "tree.h"
+#include "lua.h"
 
 /* Exported variables */
-int lua_linenumber;
-int lua_debug;
-int lua_debugline;
+Word lua_linenumber;
+Bool lua_debug;
+Word lua_debugline = 0;
+
 
 /* Internal variables */
+ 
 #ifndef MAXFUNCSTACK
-#define MAXFUNCSTACK 32
+#define MAXFUNCSTACK 100
 #endif
-static struct { int file; int function; } funcstack[MAXFUNCSTACK];
-static int nfuncstack=0;
+ 
+typedef struct FuncStackNode {
+  struct FuncStackNode *next;
+  char *file;
+  Word function;
+  Word line;
+} FuncStackNode;
+ 
+static FuncStackNode *funcStack = NULL;
+static Word nfuncstack=0;
 
 static FILE *fp;
 static char *st;
-static void (*usererror) (char *s);
-
-/*
-** Function to set user function to handle errors.
-*/
-void lua_errorfunction (void (*fn) (char *s))
-{
- usererror = fn;
-}
 
 /*
 ** Function to get the next character from the input file
 */
 static int fileinput (void)
 {
- int c = fgetc (fp);
- return (c == EOF ? 0 : c);
+ return fgetc (fp);
 }
 
 /*
@@ -52,22 +57,25 @@ static int fileinput (void)
 */
 static int stringinput (void)
 {
- st++;
- return (*(st-1));
+ return *st++;
 }
 
 /*
 ** Function to open a file to be input unit. 
-** Return 0 on success or 1 on error.
+** Return 0 on success or error message on error.
 */
-int lua_openfile (char *fn)
+char *lua_openfile (char *fn)
 {
  lua_linenumber = 1;
  lua_setinput (fileinput);
  fp = fopen (fn, "r");
- if (fp == NULL) return 1;
- if (lua_addfile (fn)) return 1;
- return 0;
+ if (fp == NULL)
+ {
+   static char buff[32];
+   sprintf(buff, "unable to open file %.10s", fn);
+   return buff;
+ }
+ return lua_addfile (fn);
 }
 
 /*
@@ -86,7 +94,7 @@ void lua_closefile (void)
 /*
 ** Function to open a string to be input unit
 */
-int lua_openstring (char *s)
+char *lua_openstring (char *s)
 {
  lua_linenumber = 1;
  lua_setinput (stringinput);
@@ -94,9 +102,8 @@ int lua_openstring (char *s)
  {
   char sn[64];
   sprintf (sn, "String: %10.10s...", s);
-  if (lua_addfile (sn)) return 1;
+  return lua_addfile (sn);
  }
- return 0;
 }
 
 /*
@@ -107,40 +114,38 @@ void lua_closestring (void)
  lua_delfile();
 }
 
-/*
-** Call user function to handle error messages, if registred. Or report error
-** using standard function (fprintf).
-*/
-void lua_error (char *s)
-{
- if (usererror != NULL) usererror (s);
- else			    fprintf (stderr, "lua: %s\n", s);
-}
 
 /*
 ** Called to execute  SETFUNCTION opcode, this function pushs a function into
-** function stack. Return 0 on success or 1 on error.
+** function stack.
 */
-int lua_pushfunction (int file, int function)
+void lua_pushfunction (char *file, Word function)
 {
- if (nfuncstack >= MAXFUNCSTACK-1)
+ FuncStackNode *newNode;
+ if (nfuncstack++ >= MAXFUNCSTACK)
  {
-  lua_error ("function stack overflow");
-  return 1;
+  lua_reportbug("function stack overflow");
  }
- funcstack[nfuncstack].file = file;
- funcstack[nfuncstack].function = function;
- nfuncstack++;
- return 0;
+ newNode = new(FuncStackNode);
+ newNode->function = function;
+ newNode->file = file;
+ newNode->line= lua_debugline;
+ newNode->next = funcStack;
+ funcStack = newNode;
 }
 
 /*
-** Called to execute  RESET opcode, this function pops a function from 
+** Called to execute RESET opcode, this function pops a function from 
 ** function stack.
 */
 void lua_popfunction (void)
 {
- nfuncstack--;
+ FuncStackNode *temp = funcStack;
+ if (temp == NULL) return;
+ --nfuncstack;
+ lua_debugline = temp->line;
+ funcStack = temp->next;
+ luaI_free(temp);
 }
 
 /*
@@ -148,30 +153,142 @@ void lua_popfunction (void)
 */
 void lua_reportbug (char *s)
 {
- char msg[1024];
+ char msg[MAXFUNCSTACK*80];
  strcpy (msg, s);
  if (lua_debugline != 0)
  {
-  int i;
-  if (nfuncstack > 0)
+  if (funcStack)
   {
-   sprintf (strchr(msg,0), 
-         "\n\tin statement begining at line %d in function \"%s\" of file \"%s\"",
-         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", 
-                            s_name(funcstack[i].function),
-			    lua_file[funcstack[i].file]);
+   FuncStackNode *func = funcStack;
+   int line = lua_debugline;
+   sprintf (strchr(msg,0), "\n\tactive stack:\n");
+   do
+   {
+     sprintf (strchr(msg,0),
+       "\t-> function \"%s\" at file \"%s\":%u\n", 
+              lua_constant[func->function]->str, func->file, line);
+     line = func->line;
+     func = func->next;
+     lua_popfunction();
+   } while (func);
   }
   else
   {
    sprintf (strchr(msg,0),
-         "\n\tin statement begining at line %d of file \"%s\"", 
+         "\n\tin statement begining at line %u of file \"%s\"", 
          lua_debugline, lua_filename());
   }
  }
  lua_error (msg);
 }
 
+ 
+/*
+** Internal function: do a string
+*/
+void lua_internaldostring (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj) && !lua_dostring(lua_getstring(obj)))
+  lua_pushnumber(1);
+ else
+  lua_pushnil();
+}
+
+/*
+** Internal function: do a file
+*/
+void lua_internaldofile (void)
+{
+ lua_Object obj = lua_getparam (1);
+ if (lua_isstring(obj) && !lua_dofile(lua_getstring(obj)))
+  lua_pushnumber(1);
+ else
+  lua_pushnil();
+}
+ 
+/*
+** Internal function: print object values
+*/
+void lua_print (void)
+{
+ int i=1;
+ lua_Object obj;
+ while ((obj=lua_getparam (i++)) != LUA_NOOBJECT)
+ {
+  if      (lua_isnumber(obj))    printf("%g\n",lua_getnumber(obj));
+  else if (lua_isstring(obj))    printf("%s\n",lua_getstring(obj));
+  else if (lua_isfunction(obj))  printf("function: %p\n",bvalue(luaI_Address(obj)));
+  else if (lua_iscfunction(obj)) printf("cfunction: %p\n",lua_getcfunction(obj)
+);
+  else if (lua_isuserdata(obj))  printf("userdata: %p\n",lua_getuserdata(obj));
+  else if (lua_istable(obj))     printf("table: %p\n",avalue(luaI_Address(obj)));
+  else if (lua_isnil(obj))       printf("nil\n");
+  else                           printf("invalid value to print\n");
+ }
+}
+
+
+/*
+** Internal function: return an object type.
+*/
+void luaI_type (void)
+{
+  lua_Object o = lua_getparam(1);
+  if (o == LUA_NOOBJECT)
+    lua_error("no parameter to function 'type'");
+  switch (lua_type(o))
+  {
+    case LUA_T_NIL :
+      lua_pushliteral("nil");
+      break;
+    case LUA_T_NUMBER :
+      lua_pushliteral("number");
+      break;
+    case LUA_T_STRING :
+      lua_pushliteral("string");
+      break;
+    case LUA_T_ARRAY :
+      lua_pushliteral("table");
+      break;
+    case LUA_T_FUNCTION :
+      lua_pushliteral("function");
+      break;
+    case LUA_T_CFUNCTION :
+      lua_pushliteral("cfunction");
+      break;
+    default :
+      lua_pushliteral("userdata");
+      break;
+  }
+}
+ 
+/*
+** Internal function: convert an object to a number
+*/
+void lua_obj2number (void)
+{
+  lua_Object o = lua_getparam(1);
+  if (lua_isnumber(o))
+    lua_pushobject(o);
+  else if (lua_isstring(o))
+  {
+    char c;
+    float f;
+    if (sscanf(lua_getstring(o),"%f %c",&f,&c) == 1)
+      lua_pushnumber(f);
+    else
+      lua_pushnil();
+  }
+  else
+    lua_pushnil();
+}
+
+
+void luaI_error (void)
+{
+  char *s = lua_getstring(lua_getparam(1));
+  if (s == NULL) s = "(no message)";
+  lua_reportbug(s);
+}
+
diff --git a/src/inout.h b/src/inout.h
index ca5920ca..22093020 100644
--- a/src/inout.h
+++ b/src/inout.h
@@ -1,21 +1,30 @@
 /*
-** $Id: inout.h,v 1.1 1993/12/17 18:41:19 celes Exp $
+** $Id: inout.h,v 1.7 1994/12/20 21:20:36 roberto Exp $
 */
 
 
 #ifndef inout_h
 #define inout_h
 
-extern int lua_linenumber;
-extern int lua_debug;
-extern int lua_debugline;
+#include "types.h"
 
-int  lua_openfile     (char *fn);
+extern Word lua_linenumber;
+extern Bool lua_debug;
+extern Word lua_debugline;
+
+char *lua_openfile     (char *fn);
 void lua_closefile    (void);
-int  lua_openstring   (char *s);
+char *lua_openstring   (char *s);
 void lua_closestring  (void);
-int  lua_pushfunction (int file, int function);
+void lua_pushfunction (char *file, Word function);
 void lua_popfunction  (void);
 void lua_reportbug    (char *s);
 
+void    lua_internaldofile (void);
+void    lua_internaldostring (void);
+void    lua_print      (void);
+void    luaI_type       (void);
+void    lua_obj2number (void);
+void	luaI_error     (void);
+
 #endif
diff --git a/src/lex.c b/src/lex.c
index 14f41434..2916084f 100644
--- a/src/lex.c
+++ b/src/lex.c
@@ -1,30 +1,20 @@
-char *rcs_lex = "$Id: lex.c,v 2.1 1994/04/15 19:00:28 celes Exp $";
-/*$Log: lex.c,v $
- * Revision 2.1  1994/04/15  19:00:28  celes
- * Retirar chamada da funcao lua_findsymbol associada a cada
- * token NAME. A decisao de chamar lua_findsymbol ou lua_findconstant
- * fica a cargo do modulo "lua.stx".
- *
- * 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 $nodebug
- *
- * Revision 1.1  1993/12/22  21:15:16  roberto
- * Initial revision
- **/
+char *rcs_lex = "$Id: lex.c,v 2.14 1994/12/27 20:50:38 celes Exp $";
+ 
 
 #include <ctype.h>
 #include <math.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "tree.h"
+#include "table.h"
 #include "opcode.h"
-#include "hash.h"
 #include "inout.h"
-#include "table.h"
-#include "y.tab.h"
+#include "parser.h"
+#include "ugly.h"
+
+#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b)))
 
 #define next() { current = input(); }
 #define save(x) { *yytextLast++ = (x); }
@@ -49,7 +39,8 @@ char *lua_lasttext (void)
 }
 
 
-static struct 
+/* The reserved words must be listed in lexicographic order */
+static struct
   {
     char *name;
     int token;
@@ -71,17 +62,18 @@ static struct
       {"until", UNTIL},
       {"while", WHILE} };
 
+
 #define RESERVEDSIZE (sizeof(reserved)/sizeof(reserved[0]))
 
 
-int findReserved (char *name)
+static 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);
+    int comp = lua_strcmp(name, reserved[m].name);
     if (comp < 0)
       h = m-1;
     else if (comp == 0)
@@ -93,13 +85,20 @@ int findReserved (char *name)
 }
 
 
-int yylex ()
+int yylex (void)
 {
+  float a;
   while (1)
   {
     yytextLast = yytext;
+#if 0
+    fprintf(stderr,"'%c' %d\n",current,current);
+#endif
     switch (current)
     {
+      case EOF:
+      case 0:
+       return 0;
       case '\n': lua_linenumber++;
       case ' ':
       case '\t':
@@ -111,34 +110,39 @@ int yylex ()
 	while (isalnum(current) || current == '_')
           save_and_next();
         *yytextLast = 0;
-	if (strcmp(yytext, "debug") == 0)
+	if (lua_strcmp(yytext, "debug") == 0)
 	{
 	  yylval.vInt = 1;
 	  return DEBUG;
         }
-	else if (strcmp(yytext, "nodebug") == 0)
+	else if (lua_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 EQ; }
+
       case '<':
         save_and_next();
         if (current != '=') return '<';
         else { save_and_next(); return LE; }
-  
+
       case '>':
         save_and_next();
         if (current != '=') return '>';
         else { save_and_next(); return GE; }
-  
+
       case '~':
         save_and_next();
         if (current != '=') return '~';
@@ -149,12 +153,13 @@ int yylex ()
       {
         int del = current;
         next();  /* skip the delimiter */
-        while (current != del) 
+        while (current != del)
         {
           switch (current)
           {
-            case 0: 
-            case '\n': 
+            case EOF:
+            case 0:
+            case '\n':
               return WRONGTOKEN;
             case '\\':
               next();  /* do not save the '\' */
@@ -163,16 +168,16 @@ int yylex ()
                 case 'n': save('\n'); next(); break;
                 case 't': save('\t'); next(); break;
                 case 'r': save('\r'); next(); break;
-                default : save('\\'); break;
+                default : save(current); next(); break;
               }
               break;
-            default: 
+            default:
               save_and_next();
           }
         }
         next();  /* skip the delimiter */
         *yytextLast = 0;
-        yylval.vWord = lua_findconstant (yytext);
+        yylval.vWord = luaI_findconstant(lua_constcreate(yytext));
         return STRING;
       }
 
@@ -190,49 +195,77 @@ int yylex ()
       case 'Z':
       case '_':
       {
-        int res;
+        Word res;
         do { save_and_next(); } while (isalnum(current) || current == '_');
         *yytextLast = 0;
         res = findReserved(yytext);
         if (res) return res;
-        yylval.pChar = yytext;
+        yylval.pNode = lua_constcreate(yytext);
         return NAME;
       }
-   
+
       case '.':
         save_and_next();
-        if (current == '.') 
-        { 
-          save_and_next(); 
+        if (current == '.')
+        {
+          save_and_next();
           return CONC;
         }
         else if (!isdigit(current)) return '.';
         /* current is a digit: goes through to number */
+	a=0.0;
         goto fraction;
 
       case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9':
-      
-        do { save_and_next(); } while (isdigit(current));
+	a=0.0;
+        do { a=10*a+current-'0'; 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));
+fraction:
+	{ float da=0.1;
+	  while (isdigit(current))
+	  {a+=(current-'0')*da; da/=10.0; save_and_next()};
+          if (current == 'e' || current == 'E')
+          {
+	    int e=0;
+	    int neg;
+	    float ea;
+            save_and_next();
+	    neg=(current=='-');
+            if (current == '+' || current == '-') save_and_next();
+            if (!isdigit(current)) return WRONGTOKEN;
+            do { e=10*e+current-'0'; save_and_next(); } while (isdigit(current));
+	    for (ea=neg?0.1:10.0; e>0; e>>=1) 
+	    {
+	      if (e & 1) a*=ea;
+	      ea*=ea;
+	    }
+          }
+          yylval.vFloat = a;
+          return NUMBER;
         }
-        *yytextLast = 0;
-        yylval.vFloat = atof(yytext);
-        return NUMBER;
+
+      case U_and: case U_do: case U_else: case U_elseif: case U_end:
+      case U_function: case U_if: case U_local: case U_nil: case U_not:
+      case U_or: case U_repeat: case U_return: case U_then:
+      case U_until: case U_while:
+      {
+        int old = current;
+        next();
+        return reserved[old-U_and].token;
+      }
+
+      case U_eq:	next(); return EQ;
+      case U_le:	next(); return LE;
+      case U_ge:	next(); return GE;
+      case U_ne:	next(); return NE;
+      case U_sc:	next(); return CONC;
 
       default: 		/* also end of file */
       {
         save_and_next();
-        return *yytext;      
+        return yytext[0];
       }
     }
   }
 }
-        
diff --git a/src/mem.c b/src/mem.c
new file mode 100644
index 00000000..90369720
--- /dev/null
+++ b/src/mem.c
@@ -0,0 +1,44 @@
+/*
+** mem.c
+** TecCGraf - PUC-Rio
+*/
+
+char *rcs_mem = "$Id: mem.c,v 1.5 1995/02/06 19:34:03 roberto Exp $";
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "mem.h"
+#include "lua.h"
+
+void luaI_free (void *block)
+{
+  *((int *)block) = -1;  /* to catch errors */
+  free(block);
+}
+
+
+void *luaI_malloc (unsigned long size)
+{
+  void *block = malloc((size_t)size);
+  if (block == NULL)
+    lua_error("not enough memory");
+  return block;
+}
+
+
+void *luaI_realloc (void *oldblock, unsigned long size)
+{
+  void *block = realloc(oldblock, (size_t)size);
+  if (block == NULL)
+    lua_error("not enough memory");
+  return block;
+}
+
+
+char *luaI_strdup (char *str)
+{
+  char *newstr = luaI_malloc(strlen(str)+1);
+  strcpy(newstr, str);
+  return newstr;
+}
diff --git a/src/mem.h b/src/mem.h
new file mode 100644
index 00000000..bae5b4d3
--- /dev/null
+++ b/src/mem.h
@@ -0,0 +1,25 @@
+/*
+** mem.c
+** memory manager for lua
+** $Id: mem.h,v 1.2 1995/01/13 22:11:12 roberto Exp $
+*/
+ 
+#ifndef mem_h
+#define mem_h
+
+#ifndef NULL
+#define NULL 0
+#endif
+
+void luaI_free (void *block);
+void *luaI_malloc (unsigned long size);
+void *luaI_realloc (void *oldblock, unsigned long size);
+
+char *luaI_strdup (char *str);
+
+#define new(s)          ((s *)luaI_malloc(sizeof(s)))
+#define newvector(n,s)  ((s *)luaI_malloc((n)*sizeof(s)))
+#define growvector(old,n,s) ((s *)luaI_realloc(old,(n)*sizeof(s)))
+
+#endif 
+
diff --git a/src/opcode.c b/src/opcode.c
index 6006f7ac..7ce5b2a6 100644
--- a/src/opcode.c
+++ b/src/opcode.c
@@ -3,171 +3,763 @@
 ** TecCGraf - PUC-Rio
 */
 
-char *rcs_opcode="$Id: opcode.c,v 2.1 1994/04/20 22:07:57 celes Exp $";
+char *rcs_opcode="$Id: opcode.c,v 3.34 1995/02/06 19:35:09 roberto Exp $";
 
-#include <stdio.h>
+#include <setjmp.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
+#include <math.h>
 
-/* stdlib.h does not have this in SunOS */
-extern double strtod(const char *, char **);
-
-#include "mm.h"
-
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
 #include "lua.h"
+#include "fallback.h"
+
+#define tonumber(o) ((tag(o) != LUA_T_NUMBER) && (lua_tonumber(o) != 0))
+#define tostring(o) ((tag(o) != LUA_T_STRING) && (lua_tostring(o) != 0))
+
+
+#define STACK_BUFFER (STACKGAP+128)
+
+typedef int StkId;  /* index to stack elements */
+
+static Long    maxstack = 0L;
+static Object *stack = NULL;
+static Object *top = NULL;
+
+
+/* macros to convert from lua_Object to (Object *) and back */
+ 
+#define Address(lo)     ((lo)+stack-1)
+#define Ref(st)         ((st)-stack+1)
+ 
+
+static StkId CBase = 0;  /* when Lua calls C or C calls Lua, points to */
+                          /* the first slot after the last parameter. */
+static int CnResults = 0; /* when Lua calls C, has the number of parameters; */
+                         /* when C calls Lua, has the number of results. */
 
-#define tonumber(o) ((tag(o) != T_NUMBER) && (lua_tonumber(o) != 0))
-#define tostring(o) ((tag(o) != T_STRING) && (lua_tostring(o) != 0))
+static  jmp_buf *errorJmp = NULL; /* current error recover point */
 
-#ifndef MAXSTACK
-#define MAXSTACK 256
-#endif
-static Object stack[MAXSTACK] = {{T_MARK, {NULL}}};
-static Object *top=stack+1, *base=stack+1;
+
+static StkId lua_execute (Byte *pc, StkId base);
+static void do_call (Object *func, StkId base, int nResults, StkId whereRes);
+
+
+
+Object *luaI_Address (lua_Object o)
+{
+  return Address(o);
+}
 
 
 /*
-** Concatenate two given string, creating a mark space at the beginning.
-** Return the new string pointer.
+** Error messages
 */
-static char *lua_strconc (char *l, char *r)
+
+static void lua_message (char *s)
 {
- char *s = calloc (strlen(l)+strlen(r)+2, sizeof(char));
- if (s == NULL)
- {
-  lua_error ("not enough memory");
-  return NULL;
- }
- *s++ = 0; 			/* create mark space */
- return strcat(strcpy(s,l),r);
+  lua_pushstring(s);
+  do_call(&luaI_fallBacks[FB_ERROR].function, (top-stack)-1, 0, (top-stack)-1);
 }
 
 /*
-** Duplicate a string,  creating a mark space at the beginning.
-** Return the new string pointer.
+** Reports an error, and jumps up to the available recover label
 */
-char *lua_strdup (char *l)
+void lua_error (char *s)
 {
- 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);
+  if (s) lua_message(s);
+  if (errorJmp)
+    longjmp(*errorJmp, 1);
+  else
+  {
+    fprintf (stderr, "lua: exit(1). Unable to recover\n");
+    exit(1);
+  }
 }
 
+
 /*
-** Convert, if possible, to a number tag.
-** Return 0 in success or not 0 on error.
-*/ 
-static int lua_tonumber (Object *obj)
+** Init stack
+*/
+static void lua_initstack (void)
 {
- char *ptr;
- if (tag(obj) != T_STRING)
- {
-  lua_reportbug ("unexpected type at conversion to number");
-  return 1;
- }
- nvalue(obj) = strtod(svalue(obj), &ptr);
- if (*ptr)
- {
-  lua_reportbug ("string to number convertion failed");
-  return 2;
- }
- tag(obj) = T_NUMBER;
- return 0;
+ maxstack = STACK_BUFFER;
+ stack = newvector(maxstack, Object);
+ top = stack;
 }
 
+
 /*
-** Test if is possible to convert an object to a number one.
-** If possible, return the converted object, otherwise return nil object.
-*/ 
-static Object *lua_convtonumber (Object *obj)
+** Check stack overflow and, if necessary, realloc vector
+*/
+#define lua_checkstack(n)  if ((Long)(n) > maxstack) checkstack(n)
+
+static void checkstack (StkId n)
 {
- static Object cvt;
- 
- if (tag(obj) == T_NUMBER)
- {
-  cvt = *obj;
-  return &cvt;
- }
-  
- tag(&cvt) = T_NIL;
- if (tag(obj) == T_STRING)
+ StkId t;
+ if (stack == NULL)
+   lua_initstack();
+ if (maxstack >= MAX_INT)
+   lua_error("stack size overflow");
+ t = top-stack;
+ maxstack *= 2;
+ if (maxstack >= MAX_INT)
+   maxstack = MAX_INT;
+ stack = growvector(stack, maxstack, Object);
+ top = stack + t;
+}
+
+
+/*
+** Concatenate two given strings. Return the new string pointer.
+*/
+static char *lua_strconc (char *l, char *r)
+{
+ static char *buffer = NULL;
+ static int buffer_size = 0;
+ int nl = strlen(l);
+ int n = nl+strlen(r)+1;
+ if (n > buffer_size)
+  {
+   buffer_size = n;
+   if (buffer != NULL)
+     luaI_free(buffer);
+   buffer = newvector(buffer_size, char);
+  }
+  strcpy(buffer,l);
+  strcpy(buffer+nl, r);
+  return buffer;
+}
+
+
+/*
+** Convert, if possible, to a number object.
+** Return 0 if success, not 0 if error.
+*/
+static int lua_tonumber (Object *obj)
+{
+ float t;
+ char c;
+ if (tag(obj) != LUA_T_STRING)
+   return 1;
+ else if (sscanf(svalue(obj), "%f %c",&t, &c) == 1)
  {
-  char *ptr;
-  nvalue(&cvt) = strtod(svalue(obj), &ptr);
-  if (*ptr == 0)
-   tag(&cvt) = T_NUMBER;
+   nvalue(obj) = t;
+   tag(obj) = LUA_T_NUMBER;
+   return 0;
  }
- return &cvt;
+ else
+   return 2;
 }
 
 
-
 /*
 ** Convert, if possible, to a string tag
 ** Return 0 in success or not 0 on error.
-*/ 
+*/
 static int lua_tostring (Object *obj)
 {
  static char s[256];
- if (tag(obj) != T_NUMBER)
- {
-  lua_reportbug ("unexpected type at conversion to string");
-  return 1;
- }
+ if (tag(obj) != LUA_T_NUMBER)
+   return 1;
  if ((int) nvalue(obj) == nvalue(obj))
-  sprintf (s, "%d", (int) nvalue(obj));
+   sprintf (s, "%d", (int) nvalue(obj));
  else
-  sprintf (s, "%g", nvalue(obj));
- svalue(obj) = lua_createstring(lua_strdup(s));
- if (svalue(obj) == NULL)
+   sprintf (s, "%g", nvalue(obj));
+ tsvalue(obj) = lua_createstring(s);
+ if (tsvalue(obj) == NULL)
   return 1;
- tag(obj) = T_STRING;
+ tag(obj) = LUA_T_STRING;
  return 0;
 }
 
 
 /*
-** Execute the given opcode. Return 0 in success or 1 on error.
+** Adjust stack. Set top to the given value, pushing NILs if needed.
+*/
+static void adjust_top (StkId newtop)
+{
+  Object *nt = stack+newtop;
+  while (top < nt) tag(top++) = LUA_T_NIL;
+  top = nt;  /* top could be bigger than newtop */
+}
+
+
+static void adjustC (int nParams)
+{
+  adjust_top(CBase+nParams);
+}
+
+
+/*
+** Call a C function. CBase will point to the top of the stack,
+** and CnResults is the number of parameters. Returns an index
+** to the first result from C.
+*/
+static StkId callC (lua_CFunction func, StkId base)
+{
+  StkId oldBase = CBase;
+  int oldCnResults = CnResults;
+  StkId firstResult;
+  CnResults = (top-stack) - base;
+  /* incorporate parameters on the stack */
+  CBase = base+CnResults;
+  (*func)();
+  firstResult = CBase;
+  CBase = oldBase;
+  CnResults = oldCnResults;
+  return firstResult;
+}
+
+/*
+** Call the fallback for invalid functions (see do_call)
+*/
+static void call_funcFB (Object *func, StkId base, int nResults, StkId whereRes)
+{
+  StkId i;
+  /* open space for first parameter (func) */
+  for (i=top-stack; i>base; i--)
+    stack[i] = stack[i-1];
+  top++;
+  stack[base] = *func;
+  do_call(&luaI_fallBacks[FB_FUNCTION].function, base, nResults, whereRes);
+}
+
+
+/*
+** Call a function (C or Lua). The parameters must be on the stack,
+** between [stack+base,top). When returns, the results are on the stack,
+** between [stack+whereRes,top). The number of results is nResults, unless
+** nResults=MULT_RET.
+*/
+static void do_call (Object *func, StkId base, int nResults, StkId whereRes)
+{
+  StkId firstResult;
+  if (tag(func) == LUA_T_CFUNCTION)
+    firstResult = callC(fvalue(func), base);
+  else if (tag(func) == LUA_T_FUNCTION)
+    firstResult = lua_execute(bvalue(func), base);
+  else
+  { /* func is not a function */
+    call_funcFB(func, base, nResults, whereRes);
+    return;
+  }
+  /* adjust the number of results */
+  if (nResults != MULT_RET && top - (stack+firstResult) != nResults)
+    adjust_top(firstResult+nResults);
+  /* move results to the given position */
+  if (firstResult != whereRes)
+  {
+    int i;
+    nResults = top - (stack+firstResult);  /* actual number of results */
+    for (i=0; i<nResults; i++)
+      *(stack+whereRes+i) = *(stack+firstResult+i);
+    top -= firstResult-whereRes;
+  }
+}
+
+
+/*
+** Function to index a table. Receives the table at top-2 and the index
+** at top-1.
+*/
+static void pushsubscript (void)
+{
+  if (tag(top-2) != LUA_T_ARRAY)
+    do_call(&luaI_fallBacks[FB_GETTABLE].function, (top-stack)-2, 1, (top-stack)-2);
+  else 
+  {
+    Object *h = lua_hashget(avalue(top-2), top-1);
+    if (h == NULL || tag(h) == LUA_T_NIL)
+      do_call(&luaI_fallBacks[FB_INDEX].function, (top-stack)-2, 1, (top-stack)-2);
+    else
+    {
+      --top;
+      *(top-1) = *h;
+    }
+  }
+}
+
+
+/*
+** Function to store indexed based on values at the top
+*/
+static void storesubscript (void)
+{
+ if (tag(top-3) != LUA_T_ARRAY)
+   do_call(&luaI_fallBacks[FB_SETTABLE].function, (top-stack)-3, 0, (top-stack)-3);
+ else
+ {
+  Object *h = lua_hashdefine (avalue(top-3), top-2);
+  *h = *(top-1);
+  top -= 3;
+ }
+}
+
+
+/*
+** Traverse all objects on stack
+*/
+void lua_travstack (void (*fn)(Object *))
+{
+ Object *o;
+ for (o = top-1; o >= stack; o--)
+  fn (o);
+}
+
+
+/*
+** Execute a protected call. If function is null compiles the pre-set input.
+** Leave nResults on the stack.
+*/
+static int do_protectedrun (Object *function, int nResults)
+{
+  jmp_buf myErrorJmp;
+  int status;
+  StkId oldCBase = CBase;
+  jmp_buf *oldErr = errorJmp;
+  errorJmp = &myErrorJmp;
+  if (setjmp(myErrorJmp) == 0)
+  {
+    do_call(function, CBase, nResults, CBase);
+    CnResults = (top-stack) - CBase;  /* number of results */
+    CBase += CnResults;  /* incorporate results on the stack */
+    status = 0;
+  }
+  else
+  {
+    CBase = oldCBase;
+    top = stack+CBase;
+    status = 1;
+  }
+  errorJmp = oldErr;
+  return status;
+}
+
+
+static int do_protectedmain (void)
+{
+  Byte *code = NULL;
+  int status;
+  StkId oldCBase = CBase;
+  jmp_buf myErrorJmp;
+  jmp_buf *oldErr = errorJmp;
+  errorJmp = &myErrorJmp;
+  if (setjmp(myErrorJmp) == 0)
+  {
+    Object f;
+    lua_parse(&code);
+    tag(&f) = LUA_T_FUNCTION; bvalue(&f) = code;
+    do_call(&f, CBase, 0, CBase);
+    status = 0;
+  }
+  else
+    status = 1;
+  if (code)
+    luaI_free(code);
+  errorJmp = oldErr;
+  CBase = oldCBase;
+  top = stack+CBase;
+  return status;
+}
+
+
+/*
+** Execute the given lua function. Return 0 on success or 1 on error.
+*/
+int lua_callfunction (lua_Object function)
+{
+  if (function == LUA_NOOBJECT)
+    return 1;
+  else
+    return do_protectedrun (Address(function), MULT_RET);
+}
+
+
+int lua_call (char *funcname)
+{
+ Word n = luaI_findsymbolbyname(funcname);
+ return do_protectedrun(&s_object(n), MULT_RET);
+}
+
+
+/*
+** Open file, generate opcode and execute global statement. Return 0 on
+** success or 1 on error.
+*/
+int lua_dofile (char *filename)
+{
+  int status;
+  char *message = lua_openfile (filename);
+  if (message)
+  {
+    lua_message(message);
+    return 1;
+  }
+  status = do_protectedmain();
+  lua_closefile();
+  return status;
+}
+
+/*
+** Generate opcode stored on string and execute global statement. Return 0 on
+** success or 1 on error.
+*/
+int lua_dostring (char *string)
+{
+  int status;
+  char *message = lua_openstring(string);
+  if (message)
+  {
+    lua_message(message);
+    return 1;
+  }
+  status = do_protectedmain();
+  lua_closestring();
+  return status;
+}
+
+
+/*
+** API: set a function as a fallback
+*/
+lua_Object lua_setfallback (char *name, lua_CFunction fallback)
+{
+  static Object func = {LUA_T_CFUNCTION, luaI_setfallback};
+  adjustC(0);
+  lua_pushstring(name);
+  lua_pushcfunction(fallback);
+  do_protectedrun(&func, 1);
+  return (Ref(top-1));
+}
+
+
+/* 
+** API: receives on the stack the table and the index.
+** returns the value.
+*/
+lua_Object lua_getsubscript (void)
+{
+  adjustC(2);
+  pushsubscript();
+  CBase++;  /* incorporate object in the stack */
+  return (Ref(top-1));
+}
+
+
+#define MAX_C_BLOCKS 10
+
+static int numCblocks = 0;
+static StkId Cblocks[MAX_C_BLOCKS];
+
+/*
+** API: starts a new block
+*/
+void lua_beginblock (void)
+{
+  if (numCblocks < MAX_C_BLOCKS)
+    Cblocks[numCblocks] = CBase;
+  numCblocks++;
+}
+
+/*
+** API: ends a block
+*/
+void lua_endblock (void)
+{
+  --numCblocks;
+  if (numCblocks < MAX_C_BLOCKS)
+  {
+    CBase = Cblocks[numCblocks];
+    adjustC(0);
+  }
+}
+
+/* 
+** API: receives on the stack the table, the index, and the new value.
+*/
+void lua_storesubscript (void)
+{
+  adjustC(3);
+  storesubscript();
+}
+
+/*
+** API: creates a new table
+*/
+lua_Object lua_createtable (void)
+{
+  adjustC(0);
+  avalue(top) = lua_createarray(0);
+  tag(top) = LUA_T_ARRAY;
+  top++;
+  CBase++;  /* incorporate object in the stack */
+  return Ref(top-1);
+}
+
+/*
+** Get a parameter, returning the object handle or LUA_NOOBJECT on error.
+** 'number' must be 1 to get the first parameter.
+*/
+lua_Object lua_getparam (int number)
+{
+ if (number <= 0 || number > CnResults) return LUA_NOOBJECT;
+ /* Ref(stack+(CBase-CnResults+number-1)) ==
+    stack+(CBase-CnResults+number-1)-stack+1 == */
+ return CBase-CnResults+number;
+}
+
+/*
+** Given an object handle, return its number value. On error, return 0.0.
+*/
+real lua_getnumber (lua_Object object)
+{
+ if (object == LUA_NOOBJECT || tag(Address(object)) == LUA_T_NIL) return 0.0;
+ if (tonumber (Address(object))) return 0.0;
+ else                   return (nvalue(Address(object)));
+}
+
+/*
+** Given an object handle, return its string pointer. On error, return NULL.
+*/
+char *lua_getstring (lua_Object object)
+{
+ if (object == LUA_NOOBJECT || tag(Address(object)) == LUA_T_NIL) return NULL;
+ if (tostring (Address(object))) return NULL;
+ else return (svalue(Address(object)));
+}
+
+/*
+** Given an object handle, return its cfuntion pointer. On error, return NULL.
+*/
+lua_CFunction lua_getcfunction (lua_Object object)
+{
+ if (object == LUA_NOOBJECT || tag(Address(object)) != LUA_T_CFUNCTION)
+   return NULL;
+ else return (fvalue(Address(object)));
+}
+
+/*
+** Given an object handle, return its user data. On error, return NULL.
+*/
+void *lua_getuserdata (lua_Object object)
+{
+ if (object == LUA_NOOBJECT || tag(Address(object)) < LUA_T_USERDATA)
+   return NULL;
+ else return (uvalue(Address(object)));
+}
+
+
+lua_Object lua_getlocked (int ref)
+{
+ adjustC(0);
+ *top = *luaI_getlocked(ref);
+ top++;
+ CBase++;  /* incorporate object in the stack */
+ return Ref(top-1);
+}
+
+
+void lua_pushlocked (int ref)
+{
+ lua_checkstack(top-stack+1);
+ *top = *luaI_getlocked(ref);
+ top++;
+}
+
+
+int lua_lock (void)
+{
+  adjustC(1);
+  return luaI_lock(--top);
+}
+
+
+/*
+** Get a global object. Return the object handle or NULL on error.
+*/
+lua_Object lua_getglobal (char *name)
+{
+ Word n = luaI_findsymbolbyname(name);
+ adjustC(0);
+ *top = s_object(n);
+ top++;
+ CBase++;  /* incorporate object in the stack */
+ return Ref(top-1);
+}
+
+/*
+** Store top of the stack at a global variable array field.
+*/
+void lua_storeglobal (char *name)
+{
+ Word n = luaI_findsymbolbyname(name);
+ adjustC(1);
+ s_object(n) = *(--top);
+}
+
+/*
+** Push a nil object
+*/
+void lua_pushnil (void)
+{
+ lua_checkstack(top-stack+1);
+ tag(top++) = LUA_T_NIL;
+}
+
+/*
+** Push an object (tag=number) to stack.
+*/
+void lua_pushnumber (real n)
+{
+ lua_checkstack(top-stack+1);
+ tag(top) = LUA_T_NUMBER; nvalue(top++) = n;
+}
+
+/*
+** Push an object (tag=string) to stack.
+*/
+void lua_pushstring (char *s)
+{
+ lua_checkstack(top-stack+1);
+ tsvalue(top) = lua_createstring(s);
+ tag(top) = LUA_T_STRING;
+ top++;
+}
+
+/*
+** Push an object (tag=string) on stack and register it on the constant table.
+*/
+void lua_pushliteral (char *s)
+{
+ lua_checkstack(top-stack+1);
+ tsvalue(top) = lua_constant[luaI_findconstant(lua_constcreate(s))];
+ tag(top) = LUA_T_STRING;
+ top++;
+}
+
+/*
+** Push an object (tag=cfunction) to stack.
+*/
+void lua_pushcfunction (lua_CFunction fn)
+{
+ lua_checkstack(top-stack+1);
+ tag(top) = LUA_T_CFUNCTION; fvalue(top++) = fn;
+}
+
+/*
+** Push an object (tag=userdata) to stack.
+*/
+void lua_pushusertag (void *u, int tag)
+{
+ if (tag < LUA_T_USERDATA) return;
+ lua_checkstack(top-stack+1);
+ tag(top) = tag; uvalue(top++) = u;
+}
+
+/*
+** Push a lua_Object to stack.
+*/
+void lua_pushobject (lua_Object o)
+{
+ lua_checkstack(top-stack+1);
+ *top++ = *Address(o);
+}
+
+/*
+** Push an object on the stack.
+*/
+void luaI_pushobject (Object *o)
+{
+ lua_checkstack(top-stack+1);
+ *top++ = *o;
+}
+
+int lua_type (lua_Object o)
+{
+  if (o == LUA_NOOBJECT)
+    return LUA_T_NIL;
+  else
+    return tag(Address(o));
+}
+
+
+void luaI_gcFB (Object *o)
+{
+  *(top++) = *o;
+  do_call(&luaI_fallBacks[FB_GC].function, (top-stack)-1, 0, (top-stack)-1);
+}
+
+
+static void call_arith (char *op)
+{
+  lua_pushstring(op);
+  do_call(&luaI_fallBacks[FB_ARITH].function, (top-stack)-3, 1, (top-stack)-3);
+}
+
+static void comparison (lua_Type tag_less, lua_Type tag_equal, 
+                        lua_Type tag_great, char *op)
+{
+  Object *l = top-2;
+  Object *r = top-1;
+  int result;
+  if (tag(l) == LUA_T_NUMBER && tag(r) == LUA_T_NUMBER)
+    result = (nvalue(l) < nvalue(r)) ? -1 : (nvalue(l) == nvalue(r)) ? 0 : 1;
+  else if (tostring(l) || tostring(r))
+  {
+    lua_pushstring(op);
+    do_call(&luaI_fallBacks[FB_ORDER].function, (top-stack)-3, 1, (top-stack)-3);
+    return;
+  }
+  else
+    result = strcmp(svalue(l), svalue(r));
+  top--;
+  nvalue(top-1) = 1;
+  tag(top-1) = (result < 0) ? tag_less : (result == 0) ? tag_equal : tag_great;
+}
+
+
+
+/*
+** Execute the given opcode, until a RET. Parameters are between
+** [stack+base,top). Returns n such that the the results are between
+** [stack+n,top).
 */
-int lua_execute (Byte *pc)
+static StkId lua_execute (Byte *pc, StkId base)
 {
- Object *oldbase = base;
- base = top;
+ lua_checkstack(STACKGAP+MAX_TEMPS+base);
  while (1)
  {
   OpCode opcode;
   switch (opcode = (OpCode)*pc++)
   {
-   case PUSHNIL: tag(top++) = T_NIL; break;
-   
-   case PUSH0: tag(top) = T_NUMBER; nvalue(top++) = 0; break;
-   case PUSH1: tag(top) = T_NUMBER; nvalue(top++) = 1; break;
-   case PUSH2: tag(top) = T_NUMBER; nvalue(top++) = 2; break;
-
-   case PUSHBYTE: tag(top) = T_NUMBER; nvalue(top++) = *pc++; break;
-   
-   case PUSHWORD: 
+   case PUSHNIL: tag(top++) = LUA_T_NIL; break;
+
+   case PUSH0: case PUSH1: case PUSH2:
+     tag(top) = LUA_T_NUMBER;
+     nvalue(top++) = opcode-PUSH0;
+     break;
+
+   case PUSHBYTE: tag(top) = LUA_T_NUMBER; nvalue(top++) = *pc++; break;
+
+   case PUSHWORD:
    {
     CodeWord code;
     get_word(code,pc);
-    tag(top) = T_NUMBER; nvalue(top++) = code.w;
+    tag(top) = LUA_T_NUMBER; nvalue(top++) = code.w;
    }
    break;
-   
+
    case PUSHFLOAT:
    {
     CodeFloat code;
     get_float(code,pc);
-    tag(top) = T_NUMBER; nvalue(top++) = code.f;
+    tag(top) = LUA_T_NUMBER; nvalue(top++) = code.f;
    }
    break;
 
@@ -175,50 +767,57 @@ int lua_execute (Byte *pc)
    {
     CodeWord code;
     get_word(code,pc);
-    tag(top) = T_STRING; svalue(top++) = lua_constant[code.w];
+    tag(top) = LUA_T_STRING; tsvalue(top++) = lua_constant[code.w];
    }
    break;
-   
+
+   case PUSHFUNCTION:
+   {
+    CodeCode code;
+    get_code(code,pc);
+    tag(top) = LUA_T_FUNCTION; bvalue(top++) = code.b;
+   }
+   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 PUSHLOCAL: *top++ = *(base + (*pc++)); break;
-   
-   case PUSHGLOBAL: 
+   case PUSHLOCAL9: *top++ = *((stack+base) + (int)(opcode-PUSHLOCAL0)); break;
+
+   case PUSHLOCAL: *top++ = *((stack+base) + (*pc++)); break;
+
+   case PUSHGLOBAL:
    {
     CodeWord code;
     get_word(code,pc);
     *top++ = s_object(code.w);
    }
    break;
-   
+
    case PUSHINDEXED:
-    --top;
-    if (tag(top-1) != T_ARRAY)
-    {
-     lua_reportbug ("indexed expression not a table");
-     return 1;
-    }
-    {
-     Object *h = lua_hashdefine (avalue(top-1), top);
-     if (h == NULL) return 1;
-     *(top-1) = *h;
-    }
-   break;
-   
-   case PUSHMARK: tag(top++) = T_MARK; break;
-   
-   case PUSHOBJECT: *top = *(top-3); top++; break;
-   
+    pushsubscript();
+    break;
+
+   case PUSHSELF:
+   {
+     Object receiver = *(top-1);
+     CodeWord code;
+     get_word(code,pc);
+     tag(top) = LUA_T_STRING; tsvalue(top++) = lua_constant[code.w];
+     pushsubscript();
+     *(top++) = receiver;
+     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 STORELOCAL: *(base + (*pc++)) = *(--top); break;
-   
+   case STORELOCAL9:
+     *((stack+base) + (int)(opcode-STORELOCAL0)) = *(--top);
+     break;
+
+   case STORELOCAL: *((stack+base) + (*pc++)) = *(--top); break;
+
    case STOREGLOBAL:
    {
     CodeWord code;
@@ -228,36 +827,29 @@ int lua_execute (Byte *pc)
    break;
 
    case STOREINDEXED0:
-    if (tag(top-3) != T_ARRAY)
-    {
-     lua_reportbug ("indexed expression not a table");
-     return 1;
-    }
-    {
-     Object *h = lua_hashdefine (avalue(top-3), top-2);
-     if (h == NULL) return 1;
-     *h = *(top-1);
-    }
-    top -= 3;
-   break;
-   
+    storesubscript();
+    break;
+
    case STOREINDEXED:
    {
     int n = *pc++;
-    if (tag(top-3-n) != T_ARRAY)
+    if (tag(top-3-n) != LUA_T_ARRAY)
     {
-     lua_reportbug ("indexed expression not a table");
-     return 1;
+      *(top+1) = *(top-1);
+      *(top) = *(top-2-n);
+      *(top-1) = *(top-3-n);
+      top += 2;
+      do_call(&luaI_fallBacks[FB_SETTABLE].function, (top-stack)-3, 0, (top-stack)-3);
     }
+    else
     {
      Object *h = lua_hashdefine (avalue(top-3-n), top-2-n);
-     if (h == NULL) return 1;
      *h = *(top-1);
+     top--;
     }
-    top--;
    }
    break;
-   
+
    case STORELIST0:
    case STORELIST:
    {
@@ -267,206 +859,180 @@ int lua_execute (Byte *pc)
     else m = *(pc++) * FIELDS_PER_FLUSH;
     n = *(pc++);
     arr = top-n-1;
-    if (tag(arr) != T_ARRAY)
-    {
-     lua_reportbug ("internal error - table expected");
-     return 1;
-    }
     while (n)
     {
-     tag(top) = T_NUMBER; nvalue(top) = n+m;
+     tag(top) = LUA_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];
+     tag(top) = LUA_T_STRING; tsvalue(top) = lua_constant[code.w];
      *(lua_hashdefine (avalue(arr), top)) = *(top-1);
      top--;
      n--;
     }
    }
    break;
-   
+
+   case ADJUST0:
+     adjust_top(base);
+     break;
+
    case ADJUST:
+     adjust_top(base + *(pc++));
+     break;
+
+   case CREATEARRAY:
    {
-    Object *newtop = base + *(pc++);
-    while (top < newtop) tag(top++) = T_NIL;
-    top = newtop;  /* top could be bigger than newtop */
+    CodeWord size;
+    get_word(size,pc);
+    avalue(top) = lua_createarray(size.w);
+    tag(top) = LUA_T_ARRAY;
+    top++;
    }
    break;
-   
-   case CREATEARRAY:
-    if (tag(top-1) == T_NIL) 
-     nvalue(top-1) = 101;
-    else 
-    {
-     if (tonumber(top-1)) return 1;
-     if (nvalue(top-1) <= 0) nvalue(top-1) = 101;
-    }
-    avalue(top-1) = lua_createarray(nvalue(top-1));
-    if (avalue(top-1) == NULL)
-     return 1;
-    tag(top-1) = T_ARRAY;
-   break;
-   
+
    case EQOP:
    {
-    Object *l = top-2;
-    Object *r = top-1;
+    int res = lua_equalObj(top-2, top-1);
     --top;
-    if (tag(l) != tag(r)) 
-     tag(top-1) = T_NIL;
-    else
-    {
-     switch (tag(l))
-     {
-      case T_NIL:       tag(top-1) = T_NUMBER; break;
-      case T_NUMBER:    tag(top-1) = (nvalue(l) == nvalue(r)) ? T_NUMBER : T_NIL; break;
-      case T_ARRAY:     tag(top-1) = (avalue(l) == avalue(r)) ? T_NUMBER : T_NIL; break;
-      case T_FUNCTION:  tag(top-1) = (bvalue(l) == bvalue(r)) ? T_NUMBER : T_NIL; break;
-      case T_CFUNCTION: tag(top-1) = (fvalue(l) == fvalue(r)) ? T_NUMBER : T_NIL; break;
-      case T_USERDATA:  tag(top-1) = (uvalue(l) == uvalue(r)) ? T_NUMBER : T_NIL; break;
-      case T_STRING:    tag(top-1) = (strcmp (svalue(l), svalue(r)) == 0) ? T_NUMBER : T_NIL; break;
-      case T_MARK:      return 1;
-     }
-    }
+    tag(top-1) = res ? LUA_T_NUMBER : LUA_T_NIL;
     nvalue(top-1) = 1;
    }
    break;
-    
-   case LTOP:
+
+    case LTOP:
+      comparison(LUA_T_NUMBER, LUA_T_NIL, LUA_T_NIL, "lt");
+      break;
+
+   case LEOP:
+      comparison(LUA_T_NUMBER, LUA_T_NUMBER, LUA_T_NIL, "le");
+      break;
+
+   case GTOP:
+      comparison(LUA_T_NIL, LUA_T_NIL, LUA_T_NUMBER, "gt");
+      break;
+
+   case GEOP:
+      comparison(LUA_T_NIL, LUA_T_NUMBER, LUA_T_NUMBER, "ge");
+      break;
+
+   case ADDOP:
    {
     Object *l = top-2;
     Object *r = top-1;
-    --top;
-    if (tag(l) == T_NUMBER && tag(r) == T_NUMBER)
-     tag(top-1) = (nvalue(l) < nvalue(r)) ? T_NUMBER : T_NIL;
+    if (tonumber(r) || tonumber(l))
+      call_arith("add");
     else
     {
-     if (tostring(l) || tostring(r))
-      return 1;
-     tag(top-1) = (strcmp (svalue(l), svalue(r)) < 0) ? T_NUMBER : T_NIL;
+      nvalue(l) += nvalue(r);
+      --top;
     }
-    nvalue(top-1) = 1; 
    }
    break;
-   
-   case LEOP:
+
+   case SUBOP:
    {
     Object *l = top-2;
     Object *r = top-1;
-    --top;
-    if (tag(l) == T_NUMBER && tag(r) == T_NUMBER)
-     tag(top-1) = (nvalue(l) <= nvalue(r)) ? T_NUMBER : T_NIL;
+    if (tonumber(r) || tonumber(l))
+      call_arith("sub");
     else
     {
-     if (tostring(l) || tostring(r))
-      return 1;
-     tag(top-1) = (strcmp (svalue(l), svalue(r)) <= 0) ? T_NUMBER : T_NIL;
+      nvalue(l) -= nvalue(r);
+      --top;
     }
-    nvalue(top-1) = 1; 
    }
    break;
-   
-   case ADDOP:
-   {
-    Object *l = top-2;
-    Object *r = top-1;
-    if (tonumber(r) || tonumber(l))
-     return 1;
-    nvalue(l) += nvalue(r);
-    --top;
-   }
-   break; 
-   
-   case SUBOP:
-   {
-    Object *l = top-2;
-    Object *r = top-1;
-    if (tonumber(r) || tonumber(l))
-     return 1;
-    nvalue(l) -= nvalue(r);
-    --top;
-   }
-   break; 
-   
+
    case MULTOP:
    {
     Object *l = top-2;
     Object *r = top-1;
     if (tonumber(r) || tonumber(l))
-     return 1;
-    nvalue(l) *= nvalue(r);
-    --top;
+      call_arith("mul");
+    else
+    {
+      nvalue(l) *= nvalue(r);
+      --top;
+    }
    }
-   break; 
-   
+   break;
+
    case DIVOP:
    {
     Object *l = top-2;
     Object *r = top-1;
     if (tonumber(r) || tonumber(l))
-     return 1;
-    nvalue(l) /= nvalue(r);
-    --top;
+      call_arith("div");
+    else
+    {
+      nvalue(l) /= nvalue(r);
+      --top;
+    }
    }
-   break; 
-   
+   break;
+
+   case POWOP:
+    call_arith("pow");
+    break;
+
    case CONCOP:
    {
     Object *l = top-2;
     Object *r = top-1;
     if (tostring(r) || tostring(l))
-     return 1;
-    svalue(l) = lua_createstring (lua_strconc(svalue(l),svalue(r)));
-    if (svalue(l) == NULL)
-     return 1;
-    --top;
+      do_call(&luaI_fallBacks[FB_CONCAT].function, (top-stack)-2, 1, (top-stack)-2);
+    else
+    {
+      tsvalue(l) = lua_createstring (lua_strconc(svalue(l),svalue(r)));
+      --top;
+    }
    }
-   break; 
-   
+   break;
+
    case MINUSOP:
     if (tonumber(top-1))
-     return 1;
-    nvalue(top-1) = - nvalue(top-1);
-   break; 
-   
+    {
+      tag(top++) = LUA_T_NIL;
+      call_arith("unm");
+    }
+    else
+      nvalue(top-1) = - nvalue(top-1);
+   break;
+
    case NOTOP:
-    tag(top-1) = tag(top-1) == T_NIL ? T_NUMBER : T_NIL;
-   break; 
-   
+    tag(top-1) = (tag(top-1) == LUA_T_NIL) ? LUA_T_NUMBER : LUA_T_NIL;
+    nvalue(top-1) = 1;
+   break;
+
    case ONTJMP:
    {
     CodeWord code;
     get_word(code,pc);
-    if (tag(top-1) != T_NIL) pc += code.w;
+    if (tag(top-1) != LUA_T_NIL) pc += code.w;
    }
    break;
-   
-   case ONFJMP:	   
+
+   case ONFJMP:	
    {
     CodeWord code;
     get_word(code,pc);
-    if (tag(top-1) == T_NIL) pc += code.w;
+    if (tag(top-1) == LUA_T_NIL) pc += code.w;
    }
    break;
-   
+
    case JMP:
    {
     CodeWord code;
@@ -474,7 +1040,7 @@ int lua_execute (Byte *pc)
     pc += code.w;
    }
    break;
-    
+
    case UPJMP:
    {
     CodeWord code;
@@ -482,13 +1048,13 @@ int lua_execute (Byte *pc)
     pc -= code.w;
    }
    break;
-   
+
    case IFFJMP:
    {
     CodeWord code;
     get_word(code,pc);
     top--;
-    if (tag(top) == T_NIL) pc += code.w;
+    if (tag(top) == LUA_T_NIL) pc += code.w;
    }
    break;
 
@@ -497,91 +1063,38 @@ int lua_execute (Byte *pc)
     CodeWord code;
     get_word(code,pc);
     top--;
-    if (tag(top) == T_NIL) pc -= code.w;
+    if (tag(top) == LUA_T_NIL) pc -= code.w;
    }
    break;
 
    case POP: --top; break;
-   
+
    case CALLFUNC:
    {
-    Byte *newpc;
-    Object *b = top-1;
-    while (tag(b) != T_MARK) b--;
-    if (tag(b-1) == T_FUNCTION)
-    {
-     lua_debugline = 0;			/* always reset debug flag */
-     newpc = bvalue(b-1);
-     bvalue(b-1) = pc;		        /* store return code */
-     nvalue(b) = (base-stack);		/* store base value */
-     base = b+1;
-     pc = newpc;
-     if (MAXSTACK-(base-stack) < STACKGAP)
-     {
-      lua_error ("stack overflow");
-      return 1;
-     }
-    }
-    else if (tag(b-1) == T_CFUNCTION)
-    {
-     int nparam; 
-     lua_debugline = 0;			/* always reset debug flag */
-     nvalue(b) = (base-stack);		/* store base value */
-     base = b+1;
-     nparam = top-base;			/* number of parameters */
-     (fvalue(b-1))();			/* call C function */
-     
-     /* shift returned values */
-     { 
-      int i;
-      int nretval = top - base - nparam;
-      top = base - 2;
-      base = stack + (int) nvalue(base-1);
-      for (i=0; i<nretval; i++)
-      {
-       *top = *(top+nparam+2);
-       ++top;
-      }
-     }
-    }
-    else
-    {
-     lua_reportbug ("call expression not a function");
-     return 1;
-    }
+     int nParams = *(pc++);
+     int nResults = *(pc++);
+     Object *func = top-1-nParams; /* function is below parameters */
+     StkId newBase = (top-stack)-nParams;
+     do_call(func, newBase, nResults, newBase-1);
    }
    break;
-   
+
+   case RETCODE0:
+     return base;
+
    case RETCODE:
-   {
-    int i;
-    int shift = *pc++;
-    int nretval = top - base - shift;
-    top = base - 2;
-    pc = bvalue(base-2);
-    base = stack + (int) nvalue(base-1);
-    for (i=0; i<nretval; i++)
-    {
-     *top = *(top+shift+2);
-     ++top;
-    }
-   }
-   break;
-   
-   case HALT:
-    base = oldbase;
-   return 0;		/* success */
-   
+     return base+*pc;
+
    case SETFUNCTION:
    {
-    CodeWord file, func;
-    get_word(file,pc);
+    CodeCode file;
+    CodeWord func;
+    get_code(file,pc);
     get_word(func,pc);
-    if (lua_pushfunction (file.w, func.w))
-     return 1;
+    lua_pushfunction ((char *)file.b, func.w);
    }
    break;
-   
+
    case SETLINE:
    {
     CodeWord code;
@@ -589,433 +1102,15 @@ int lua_execute (Byte *pc)
     lua_debugline = code.w;
    }
    break;
-   
+
    case RESET:
     lua_popfunction ();
    break;
-   
+
    default:
-    lua_error ("internal error - opcode didn't match");
-   return 1;
+    lua_error ("internal error - opcode doesn't match");
   }
  }
 }
 
 
-/*
-** Traverse all objects on stack
-*/
-void lua_travstack (void (*fn)(Object *))
-{
- Object *o;
- for (o = top-1; o >= stack; o--)
-  fn (o);
-}
-
-/*
-** Open file, generate opcode and execute global statement. Return 0 on
-** success or 1 on error.
-*/
-int lua_dofile (char *filename)
-{
- if (lua_openfile (filename)) return 1;
- if (lua_parse ()) { lua_closefile (); return 1; }
- lua_closefile ();
- return 0;
-}
-
-/*
-** Generate opcode stored on string and execute global statement. Return 0 on
-** success or 1 on error.
-*/
-int lua_dostring (char *string)
-{
- if (lua_openstring (string)) return 1;
- if (lua_parse ()) return 1;
- lua_closestring();
- return 0;
-}
-
-/*
-** Execute the given function. Return 0 on success or 1 on error.
-*/
-int lua_call (char *functionname, int nparam)
-{
- static Byte startcode[] = {CALLFUNC, HALT};
- int i; 
- Object func = s_object(lua_findsymbol(functionname));
- if (tag(&func) != T_FUNCTION) return 1;
- for (i=1; i<=nparam; i++)
-  *(top-i+2) = *(top-i);
- top += 2;
- tag(top-nparam-1) = T_MARK;
- *(top-nparam-2) = func;
- return (lua_execute (startcode));
-}
-
-/*
-** Get a parameter, returning the object handle or NULL on error.
-** 'number' must be 1 to get the first parameter.
-*/
-Object *lua_getparam (int number)
-{
- if (number <= 0 || number > top-base) return NULL;
- return (base+number-1);
-}
-
-/*
-** Given an object handle, return its number value. On error, return 0.0.
-*/
-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));
-}
-
-/*
-** Given an object handle, return its string pointer. On error, return NULL.
-*/
-char *lua_getstring (Object *object)
-{
- if (object == NULL || tag(object) == T_NIL) return NULL;
- if (tostring (object)) return NULL;
- else                   return (svalue(object));
-}
-
-/*
-** Given an object handle, return a copy of its string. On error, return NULL.
-*/
-char *lua_copystring (Object *object)
-{
- if (object == NULL || tag(object) == T_NIL) return NULL;
- if (tostring (object)) return NULL;
- else                   return (strdup(svalue(object)));
-}
-
-/*
-** Given an object handle, return its cfuntion pointer. On error, return NULL.
-*/
-lua_CFunction lua_getcfunction (Object *object)
-{
- if (object == NULL) return NULL;
- if (tag(object) != T_CFUNCTION) return NULL;
- else                            return (fvalue(object));
-}
-
-/*
-** Given an object handle, return its user data. On error, return NULL.
-*/
-void *lua_getuserdata (Object *object)
-{
- if (object == NULL) return NULL;
- if (tag(object) != T_USERDATA) return NULL;
- else                           return (uvalue(object));
-}
-
-/*
-** Given an object handle and a field name, return its field object.
-** On error, return NULL.
-*/
-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(lua_strdup(field));
-  return (lua_hashdefine(avalue(object), &ref));
- }
-}
-
-/*
-** Given an object handle and an index, return its indexed object.
-** On error, return NULL.
-*/
-Object *lua_getindexed (Object *object, float index)
-{
- if (object == NULL) return NULL;
- if (tag(object) != T_ARRAY)
-  return NULL;
- else
- {
-  Object ref;
-  tag(&ref) = T_NUMBER;
-  nvalue(&ref) = index;
-  return (lua_hashdefine(avalue(object), &ref));
- }
-}
-
-/*
-** Get a global object. Return the object handle or NULL on error.
-*/
-Object *lua_getglobal (char *name)
-{
- int n = lua_findsymbol(name);
- if (n < 0) return NULL;
- return &s_object(n);
-}
-
-/*
-** Pop and return an object
-*/
-Object *lua_pop (void)
-{
- if (top <= base) return NULL;
- top--;
- return top;
-}
-
-/*
-** Push a nil object
-*/
-int lua_pushnil (void)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- tag(top) = T_NIL;
- return 0;
-}
-
-/*
-** Push an object (tag=number) to stack. Return 0 on success or 1 on error.
-*/
-int lua_pushnumber (real n)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- tag(top) = T_NUMBER; nvalue(top++) = n;
- return 0;
-}
-
-/*
-** Push an object (tag=string) to stack. Return 0 on success or 1 on error.
-*/
-int lua_pushstring (char *s)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- tag(top) = T_STRING; 
- svalue(top++) = lua_createstring(lua_strdup(s));
- return 0;
-}
-
-/*
-** Push an object (tag=cfunction) to stack. Return 0 on success or 1 on error.
-*/
-int lua_pushcfunction (lua_CFunction fn)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- tag(top) = T_CFUNCTION; fvalue(top++) = fn;
- return 0;
-}
-
-/*
-** Push an object (tag=userdata) to stack. Return 0 on success or 1 on error.
-*/
-int lua_pushuserdata (void *u)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- tag(top) = T_USERDATA; uvalue(top++) = u;
- return 0;
-}
-
-/*
-** Push an object to stack.
-*/
-int lua_pushobject (Object *o)
-{
- if ((top-stack) >= MAXSTACK-1)
- {
-  lua_error ("stack overflow");
-  return 1;
- }
- *top++ = *o;
- return 0;
-}
-
-/*
-** Store top of the stack at a global variable array field. 
-** Return 1 on error, 0 on success.
-*/
-int lua_storeglobal (char *name)
-{
- int n = lua_findsymbol (name);
- if (n < 0) return 1;
- if (tag(top-1) == T_MARK) return 1;
- s_object(n) = *(--top);
- return 0;
-}
-
-/*
-** Store top of the stack at an array field. Return 1 on error, 0 on success.
-*/
-int lua_storefield (lua_Object object, char *field)
-{
- if (tag(object) != T_ARRAY)
-  return 1;
- else
- {
-  Object ref, *h;
-  tag(&ref) = T_STRING;
-  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;
-  *h = *(--top);
- }
- return 0;
-}
-
-
-/*
-** Store top of the stack at an array index. Return 1 on error, 0 on success.
-*/
-int lua_storeindexed (lua_Object object, float index)
-{
- if (tag(object) != T_ARRAY)
-  return 1;
- else
- {
-  Object ref, *h;
-  tag(&ref) = T_NUMBER;
-  nvalue(&ref) = index;
-  h = lua_hashdefine(avalue(object), &ref);
-  if (h == NULL) return 1;
-  if (tag(top-1) == T_MARK) return 1;
-  *h = *(--top);
- }
- return 0;
-}
-
-
-/*
-** Given an object handle, return if it is nil.
-*/
-int lua_isnil (Object *object)
-{
- return (object != NULL && tag(object) == T_NIL);
-}
-
-/*
-** Given an object handle, return if it is a number one.
-*/
-int lua_isnumber (Object *object)
-{
- return (object != NULL && tag(object) == T_NUMBER);
-}
-
-/*
-** Given an object handle, return if it is a string one.
-*/
-int lua_isstring (Object *object)
-{
- return (object != NULL && tag(object) == T_STRING);
-}
-
-/*
-** Given an object handle, return if it is an array one.
-*/
-int lua_istable (Object *object)
-{
- return (object != NULL && tag(object) == T_ARRAY);
-}
-
-/*
-** Given an object handle, return if it is a cfunction one.
-*/
-int lua_iscfunction (Object *object)
-{
- return (object != NULL && tag(object) == T_CFUNCTION);
-}
-
-/*
-** Given an object handle, return if it is an user data one.
-*/
-int lua_isuserdata (Object *object)
-{
- return (object != NULL && tag(object) == T_USERDATA);
-}
-
-/*
-** Internal function: return an object type. 
-*/
-void lua_type (void)
-{
- Object *o = lua_getparam(1);
- lua_pushstring (lua_constant[tag(o)]);
-}
-
-/*
-** Internal function: convert an object to a number
-*/
-void lua_obj2number (void)
-{
- Object *o = lua_getparam(1);
- lua_pushobject (lua_convtonumber(o));
-}
-
-/*
-** Internal function: print object values
-*/
-void lua_print (void)
-{
- int i=1;
- void *obj;
- while ((obj=lua_getparam (i++)) != NULL)
- {
-  if      (lua_isnumber(obj))    printf("%g\n",lua_getnumber (obj));
-  else if (lua_isstring(obj))    printf("%s\n",lua_getstring (obj));
-  else if (lua_iscfunction(obj)) printf("cfunction: %p\n",lua_getcfunction (obj));
-  else if (lua_isuserdata(obj))  printf("userdata: %p\n",lua_getuserdata (obj));
-  else if (lua_istable(obj))     printf("table: %p\n",obj);
-  else if (lua_isnil(obj))       printf("nil\n");
-  else			         printf("invalid value to print\n");
- }
-}
-
-/*
-** 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();
-}
-
-
diff --git a/src/opcode.h b/src/opcode.h
index abf284c4..e3a6d37c 100644
--- a/src/opcode.h
+++ b/src/opcode.h
@@ -1,11 +1,15 @@
 /*
 ** TeCGraf - PUC-Rio
-** $Id: opcode.h,v 2.1 1994/04/20 22:07:57 celes Exp $
+** $Id: opcode.h,v 3.10 1994/12/20 21:20:36 roberto Exp $
 */
 
 #ifndef opcode_h
 #define opcode_h
 
+#include "lua.h"
+#include "types.h"
+#include "tree.h"
+
 #ifndef STACKGAP
 #define STACKGAP	128
 #endif 
@@ -16,21 +20,8 @@
 
 #define FIELDS_PER_FLUSH 40
 
-typedef unsigned char  Byte;
-
-typedef unsigned short Word;
-
-typedef union
-{
- struct {char c1; char c2;} m;
- Word w;
-} CodeWord;
+#define MAX_TEMPS	20
 
-typedef union
-{
- struct {char c1; char c2; char c3; char c4;} m;
- float f;
-} CodeFloat;
 
 typedef enum 
 { 
@@ -40,13 +31,13 @@ typedef enum
  PUSHWORD,
  PUSHFLOAT,
  PUSHSTRING,
+ PUSHFUNCTION,
  PUSHLOCAL0, PUSHLOCAL1, PUSHLOCAL2, PUSHLOCAL3, PUSHLOCAL4,
  PUSHLOCAL5, PUSHLOCAL6, PUSHLOCAL7, PUSHLOCAL8, PUSHLOCAL9,
  PUSHLOCAL,
  PUSHGLOBAL,
  PUSHINDEXED,
- PUSHMARK,
- PUSHOBJECT,
+ PUSHSELF,
  STORELOCAL0, STORELOCAL1, STORELOCAL2, STORELOCAL3, STORELOCAL4,
  STORELOCAL5, STORELOCAL6, STORELOCAL7, STORELOCAL8, STORELOCAL9,
  STORELOCAL,
@@ -56,15 +47,19 @@ typedef enum
  STORELIST0,
  STORELIST,
  STORERECORD,
+ ADJUST0,
  ADJUST,
  CREATEARRAY,
  EQOP,
  LTOP,
  LEOP,
+ GTOP,
+ GEOP,
  ADDOP,
  SUBOP,
  MULTOP,
  DIVOP,
+ POWOP,
  CONCOP,
  MINUSOP,
  NOTOP,
@@ -76,61 +71,51 @@ typedef enum
  IFFUPJMP,
  POP,
  CALLFUNC,
+ RETCODE0,
  RETCODE,
- HALT,
  SETFUNCTION,
  SETLINE,
  RESET
 } OpCode;
 
-typedef enum
-{
- T_MARK,
- T_NIL,
- T_NUMBER,
- T_STRING,
- T_ARRAY,
- T_FUNCTION,
- T_CFUNCTION,
- T_USERDATA
-} Type; 
+#define MULT_RET	255
+
 
 typedef void (*Cfunction) (void);
 typedef int  (*Input) (void);
 
 typedef union
 {
- Cfunction 	 f;
- real    	 n;
- char      	*s;
- Byte      	*b;
+ Cfunction     f;
+ real          n;
+ TaggedString *ts;
+ Byte         *b;
  struct Hash    *a;
  void           *u;
 } Value;
 
 typedef struct Object
 {
- Type  tag;
+ lua_Type  tag;
  Value value;
 } Object;
 
 typedef struct
 {
- char   *name;
  Object  object;
 } Symbol;
 
 /* Macros to access structure members */
 #define tag(o)		((o)->tag)
 #define nvalue(o)	((o)->value.n)
-#define svalue(o)	((o)->value.s)
+#define svalue(o)	((o)->value.ts->str)
+#define tsvalue(o)	((o)->value.ts)
 #define bvalue(o)	((o)->value.b)
 #define avalue(o)	((o)->value.a)
 #define fvalue(o)	((o)->value.f)
 #define uvalue(o)	((o)->value.u)
 
 /* Macros to access symbol table */
-#define s_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 +125,40 @@ typedef struct
 #define s_fvalue(i)	(fvalue(&s_object(i)))
 #define s_uvalue(i)	(uvalue(&s_object(i)))
 
+typedef union
+{
+ struct {char c1; char c2;} m;
+ Word w;
+} CodeWord;
 #define get_word(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;}
+
+typedef union
+{
+ struct {char c1; char c2; char c3; char c4;} m;
+ float f;
+} CodeFloat;
 #define get_float(code,pc)   {code.m.c1 = *pc++; code.m.c2 = *pc++;\
                               code.m.c3 = *pc++; code.m.c4 = *pc++;}
- 
+
+typedef union
+{
+ struct {char c1; char c2; char c3; char c4;} m;
+ Byte *b;
+} CodeCode;
+#define get_code(code,pc)    {code.m.c1 = *pc++; code.m.c2 = *pc++;\
+                              code.m.c3 = *pc++; code.m.c4 = *pc++;}
 
 
 /* Exported functions */
-int     lua_execute   (Byte *pc);
-void    lua_markstack (void);
 char   *lua_strdup (char *l);
 
 void    lua_setinput   (Input fn);	/* from "lex.c" module */
 char   *lua_lasttext   (void);		/* from "lex.c" module */
-int     lua_parse      (void); 		/* from "lua.stx" module */
-void    lua_type       (void);
-void 	lua_obj2number (void);
-void 	lua_print      (void);
-void 	lua_internaldofile (void);
-void 	lua_internaldostring (void);
+int     yylex (void);		        /* from "lex.c" module */
+void    lua_parse      (Byte **code);	/* from "lua.stx" module */
 void    lua_travstack (void (*fn)(Object *));
+Object *luaI_Address (lua_Object o);
+void	luaI_pushobject (Object *o);
+void    luaI_gcFB       (Object *o);
 
 #endif
diff --git a/src/y.tab.c b/src/parser.c
index 70dbd3cd..47b77fb0 100644
--- a/src/y.tab.c
+++ b/src/parser.c
@@ -1,36 +1,56 @@
+#if defined (__cplusplus) || defined (c_plusplus)
+#include <c_varieties.h>
+#ifdef __EXTERN_C__
+	EXTERN_FUNCTION ( extern int yylex, ());
+#else
+	extern int yylex();
+#endif
+	extern void yyerror(char *);
+	extern int yyparse();
+#endif
+
+#include <malloc.h>
 
 # line 2 "lua.stx"
 
-char *rcs_luastx = "$Id: lua.stx,v 2.4 1994/04/20 16:22:21 celes Exp $";
+char *rcs_luastx = "$Id: lua.stx,v 3.17 1995/01/13 22:11:12 roberto Exp $";
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "mm.h"
-
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
+#include "tree.h"
 #include "table.h"
 #include "lua.h"
 
+/* to avoid warnings generated by yacc */
+int yyparse (void);
+#define malloc luaI_malloc
+#define realloc luaI_realloc
+#define free luaI_free
+
+#ifndef LISTING
 #define LISTING 0
+#endif
 
-#ifndef GAPCODE
-#define GAPCODE 50
+#ifndef CODE_BLOCK
+#define CODE_BLOCK 256
 #endif
-static Word   maxcode;
-static Word   maxmain;
-static Word   maxcurr ;
-static Byte  *code = NULL;
-static Byte  *initcode;
+static int   maxcode;
+static int   maxmain;
+static Long   maxcurr;  /* to allow maxcurr *= 2 without overflow */
+static Byte  *funcCode = NULL;
+static Byte **initcode;
 static Byte  *basepc;
-static Word   maincode;
-static Word   pc;
+static int   maincode;
+static int   pc;
 
 #define MAXVAR 32
-static long    varbuffer[MAXVAR];    /* variables in an assignment list;
+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 */
 
@@ -40,8 +60,7 @@ 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 */
 
@@ -49,13 +68,12 @@ static void code_byte (Byte c)
 {
  if (pc>maxcurr-2)  /* 1 byte free to code HALT of main code */
  {
-  maxcurr += GAPCODE;
-  basepc = (Byte *)realloc(basepc, maxcurr*sizeof(Byte));
-  if (basepc == NULL)
-  {
-   lua_error ("not enough memory");
-   err = 1;
-  }
+  if (maxcurr >= MAX_INT)
+    lua_error("code size overflow");
+  maxcurr *= 2;
+  if (maxcurr >= MAX_INT)
+    maxcurr = MAX_INT;
+  basepc = growvector(basepc, maxcurr, Byte);
  }
  basepc[pc++] = c;
 }
@@ -78,6 +96,16 @@ static void code_float (float n)
  code_byte(code.m.c4);
 }
 
+static void code_code (Byte *b)
+{
+ CodeCode code;
+ code.b = b;
+ 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;
@@ -91,10 +119,7 @@ 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)
@@ -105,7 +130,6 @@ static void flush_record (int n)
   code_byte(n);
   for (i=0; i<n; i++)
     code_word(fields[--nfields]);
-  ntemp -= n;
 }
 
 static void flush_list (int m, int n)
@@ -114,34 +138,22 @@ static void flush_list (int m, int n)
   if (m == 0)
     code_byte(STORELIST0); 
   else
+  if (m < 255)
   {
     code_byte(STORELIST);
     code_byte(m);
   }
+  else
+   lua_error ("list constructor too long");
   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)
+ if (MAX_TEMPS+nlocalvar+MAXVAR+n < STACKGAP)
   nlocalvar += n;
  else
- {
-  lua_error ("too many local variables or expression too complicate");
-  err = 1;
- }
+  lua_error ("too many local variables");
 }
 
 static void incr_nvarbuffer (void)
@@ -149,14 +161,12 @@ 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;
+{ 
+  Word i = (Word)f;
   if (f == (float)i)  /* f has an (short) integer value */
   {
    if (i <= 2) code_byte(PUSH0 + i);
@@ -176,59 +186,8 @@ static void code_number (float f)
    code_byte(PUSHFLOAT);
    code_float(f);
   }
-  incr_ntemp();
 }
 
-
-# line 184 "lua.stx"
-typedef union  
-{
- int   vInt;
- long  vLong;
- float vFloat;
- char *pChar;
- Word  vWord;
- Byte *pByte;
-} YYSTYPE;
-# define WRONGTOKEN 257
-# define NIL 258
-# define IF 259
-# define THEN 260
-# define ELSE 261
-# define ELSEIF 262
-# define WHILE 263
-# define DO 264
-# define REPEAT 265
-# define UNTIL 266
-# define END 267
-# define RETURN 268
-# define LOCAL 269
-# define NUMBER 270
-# define FUNCTION 271
-# define STRING 272
-# define NAME 273
-# define DEBUG 274
-# define AND 275
-# define OR 276
-# define NE 277
-# define LE 278
-# define GE 279
-# define CONC 280
-# define UNARY 281
-# define NOT 282
-#define yyclearin yychar = -1
-#define yyerrok yyerrflag = 0
-extern int yychar;
-extern int yyerrflag;
-#ifndef YYMAXDEPTH
-#define YYMAXDEPTH 150
-#endif
-YYSTYPE yylval, yyval;
-# define YYERRCODE 256
-
-# line 622 "lua.stx"
-
-
 /*
 ** Search a local name and if find return its index. If do not find return -1
 */
@@ -245,13 +204,12 @@ static int lua_localname (Word n)
 ** 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)
+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 */
  {
@@ -262,19 +220,77 @@ static void lua_pushvar (long number)
    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);
+ if (n+nlocalvar == 0)
+   code_byte(ADJUST0);
+ else
+ {
+   code_byte(ADJUST);
+   code_byte(n+nlocalvar);
+ }
+}
+
+static void init_function (TreeNode *func)
+{
+ if (funcCode == NULL)	/* first function */
+ {
+  funcCode = newvector(CODE_BLOCK, Byte);
+  maxcode = CODE_BLOCK;
+ }
+ pc=0; basepc=funcCode; maxcurr=maxcode; 
+ nlocalvar=0;
+  if (lua_debug)
+  {
+    code_byte(SETFUNCTION); 
+    code_code((Byte *)luaI_strdup(lua_file[lua_nfile-1]));
+    code_word(luaI_findconstant(func));
+  }
+}
+
+static void codereturn (void)
+{
+  if (lua_debug) code_byte(RESET); 
+  if (nlocalvar == 0)
+    code_byte(RETCODE0);
+  else
+  {
+    code_byte(RETCODE);
+    code_byte(nlocalvar);
+  }
+}
+
+static void codedebugline (void)
+{
+  if (lua_debug)
+  {
+    code_byte(SETLINE);
+    code_word(lua_linenumber);
+  }
+}
+
+static void adjust_mult_assign (int vars, int exps, int temps)
+{
+  if (exps < 0) 
+  {
+    int r = vars - (-exps-1);
+    if (r >= 0)
+      code_byte(r);
+    else
+    {
+      code_byte(0);
+      lua_codeadjust(temps);
+    }
+  }
+  else if (vars != exps)
+    lua_codeadjust(temps);
 }
 
 static void lua_codestore (int i)
@@ -312,48 +328,102 @@ static void lua_codestore (int i)
  }
 }
 
-void yyerror (char *s)
+static void codeIf (Long thenAdd, Long elseAdd)
+{
+  Long elseinit = elseAdd+sizeof(Word)+1;
+  if (pc == elseinit)		/* no else */
+  {
+    pc -= sizeof(Word)+1;
+    elseinit = pc;
+  }
+  else
+  {
+    basepc[elseAdd] = JMP;
+    code_word_at(basepc+elseAdd+1, pc-elseinit);
+  }
+  basepc[thenAdd] = IFFJMP;
+  code_word_at(basepc+thenAdd+1,elseinit-(thenAdd+sizeof(Word)+1));
+}
+
+static 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.
+** Parse LUA code.
 */
-int lua_parse (void)
+void lua_parse (Byte **code)
 {
- Byte *init = initcode = (Byte *) calloc(GAPCODE, sizeof(Byte));
+ initcode = code;
+ *initcode = newvector(CODE_BLOCK, Byte);
  maincode = 0; 
- maxmain = GAPCODE;
- if (init == NULL)
- {
-  lua_error("not enough memory");
-  return 1;
- }
- err = 0;
- if (yyparse () || (err==1)) return 1;
- initcode[maincode++] = HALT;
- init = initcode;
+ maxmain = CODE_BLOCK;
+ if (yyparse ()) lua_error("parse error");
+ (*initcode)[maincode++] = RETCODE0;
 #if LISTING
- PrintCode(init,init+maincode);
+{ static void PrintCode (Byte *c, Byte *end);
+ PrintCode(*initcode,*initcode+maincode); }
 #endif
- if (lua_execute (init)) return 1;
- free(init);
- return 0;
 }
 
 
+
+# line 365 "lua.stx"
+typedef union  
+{
+ int   vInt;
+ float vFloat;
+ char *pChar;
+ Word  vWord;
+ Long  vLong;
+ Byte *pByte;
+ TreeNode *pNode;
+} YYSTYPE;
+# define WRONGTOKEN 257
+# define NIL 258
+# define IF 259
+# define THEN 260
+# define ELSE 261
+# define ELSEIF 262
+# define WHILE 263
+# define DO 264
+# define REPEAT 265
+# define UNTIL 266
+# define END 267
+# define RETURN 268
+# define LOCAL 269
+# define FUNCTION 270
+# define NUMBER 271
+# define STRING 272
+# define NAME 273
+# define DEBUG 274
+# define AND 275
+# define OR 276
+# define EQ 277
+# define NE 278
+# define LE 279
+# define GE 280
+# define CONC 281
+# define UNARY 282
+# define NOT 283
+#define yyclearin yychar = -1
+#define yyerrok yyerrflag = 0
+extern int yychar;
+extern int yyerrflag;
+#ifndef YYMAXDEPTH
+#define YYMAXDEPTH 150
+#endif
+YYSTYPE yylval, yyval;
+# define YYERRCODE 256
+
+# line 737 "lua.stx"
+
+
 #if LISTING
 
 static void PrintCode (Byte *code, Byte *end)
@@ -400,6 +470,16 @@ static void PrintCode (Byte *code, Byte *end)
     			 printf ("%d    PUSHSTRING   %d\n", n, c.w);
 			}
    			break;
+   case PUSHFUNCTION:
+			{
+			 CodeCode c;
+			 int n = p-code;
+			 p++;
+			 get_code(c,p);
+			 printf ("%d    PUSHFUNCTION  %p\n", n, c.b);
+			}
+			break;
+
    case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
    case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
    case PUSHLOCAL8: case PUSHLOCAL9:
@@ -419,8 +499,6 @@ static void PrintCode (Byte *code, Byte *end)
 			}
    			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:
@@ -440,6 +518,15 @@ static void PrintCode (Byte *code, Byte *end)
     			 printf ("%d    STOREGLOBAL   %d\n", n, c.w);
 			}
    			break;
+   case PUSHSELF:
+    			{
+			 CodeWord c;
+			 int n = p-code;
+			 p++;
+			 get_word(c,p);
+    			 printf ("%d    PUSHSELF   %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++;
@@ -456,11 +543,20 @@ static void PrintCode (Byte *code, Byte *end)
        printf("%d      STORERECORD  %d\n", p-code, *(++p));
        p += *p*sizeof(Word) + 1;
        break;
+   case ADJUST0: printf ("%d    ADJUST0\n", (p++)-code); break;
    case ADJUST:
     			printf ("%d    ADJUST   %d\n", p-code, *(++p));
     			p++;
    			break;
-   case CREATEARRAY:	printf ("%d    CREATEARRAY\n", (p++)-code); break;
+   case CREATEARRAY:	
+    {
+      CodeWord c;
+      int n = p-code;
+      p++;
+      get_word(c,p);
+      printf ("%d    CREATEARRAY %d\n", n, c.w);
+      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;
@@ -468,6 +564,7 @@ static void PrintCode (Byte *code, Byte *end)
    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 POWOP:       	printf ("%d    POWOP\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;
@@ -526,20 +623,24 @@ static void PrintCode (Byte *code, Byte *end)
 			}
    			break;
    case POP:       	printf ("%d    POP\n", (p++)-code); break;
-   case CALLFUNC:	printf ("%d    CALLFUNC\n", (p++)-code); break;
+   case CALLFUNC:
+	printf ("%d    CALLFUNC %d %d\n", p-code, *(p+1), *(p+2));
+	p+=3;
+	break;
+   case RETCODE0: printf ("%d    RETCODE0\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;
+			 CodeCode c1;
+                         CodeWord c2;
                          int n = p-code;
                          p++;
-                         get_word(c1,p);
+                         get_code(c1,p);
                          get_word(c2,p);
-                         printf ("%d    SETFUNCTION  %d  %d\n", n, c1.w, c2.w);
+                         printf ("%d    SETFUNCTION  %s  %d\n", n, (char *)c1.b, c2.w);
                         }
                         break;
    case SETLINE:
@@ -564,194 +665,201 @@ int yyexca[] ={
 	0, -1,
 	-2, 2,
 -1, 20,
-	40, 67,
-	91, 94,
-	46, 96,
-	-2, 91,
+	61, 91,
+	44, 91,
+	-2, 97,
 -1, 32,
-	40, 67,
-	91, 94,
-	46, 96,
-	-2, 51,
--1, 73,
-	275, 34,
-	276, 34,
-	61, 34,
-	277, 34,
-	62, 34,
-	60, 34,
-	278, 34,
-	279, 34,
-	280, 34,
-	43, 34,
-	45, 34,
-	42, 34,
-	47, 34,
+	40, 66,
+	123, 66,
+	-2, 53,
+-1, 47,
+	123, 63,
 	-2, 70,
 -1, 74,
-	91, 94,
-	46, 96,
-	-2, 92,
--1, 105,
-	261, 28,
-	262, 28,
-	266, 28,
-	267, 28,
-	268, 28,
-	-2, 11,
--1, 125,
-	268, 31,
-	-2, 30,
--1, 146,
-	275, 34,
-	276, 34,
-	61, 34,
-	277, 34,
-	62, 34,
-	60, 34,
-	278, 34,
-	279, 34,
-	280, 34,
-	43, 34,
-	45, 34,
-	42, 34,
-	47, 34,
+	125, 79,
+	-2, 63,
+-1, 79,
+	275, 37,
+	276, 37,
+	277, 37,
+	278, 37,
+	62, 37,
+	60, 37,
+	279, 37,
+	280, 37,
+	281, 37,
+	43, 37,
+	45, 37,
+	42, 37,
+	47, 37,
+	94, 37,
 	-2, 72,
+-1, 80,
+	91, 97,
+	46, 97,
+	-2, 92,
+-1, 118,
+	261, 33,
+	262, 33,
+	266, 33,
+	267, 33,
+	-2, 16,
+-1, 133,
+	125, 85,
+	-2, 63,
+-1, 158,
+	123, 63,
+	-2, 70,
+-1, 159,
+	275, 37,
+	276, 37,
+	277, 37,
+	278, 37,
+	62, 37,
+	60, 37,
+	279, 37,
+	280, 37,
+	281, 37,
+	43, 37,
+	45, 37,
+	42, 37,
+	47, 37,
+	94, 37,
+	-2, 74,
 	};
 # define YYNPROD 103
-# define YYLAST 364
+# define YYLAST 351
 int yyact[]={
 
-    58,    56,    22,    57,   132,    59,    58,    56,   137,    57,
-   110,    59,    58,    56,   107,    57,    85,    59,    51,    50,
-    52,    82,    23,    43,    51,    50,    52,    58,    56,     9,
-    57,   157,    59,    58,    56,   165,    57,     5,    59,   162,
-     6,   161,   104,   154,   155,    51,    50,    52,    64,   153,
-    70,    51,    50,    52,    26,    58,    56,   127,    57,    10,
-    59,   111,    25,    78,    27,    58,    56,    28,    57,    29,
-    59,   131,   147,    51,    50,    52,     7,    65,    66,   115,
-   150,   112,    63,    51,    50,    52,    68,    69,    31,   159,
-    11,    79,    58,    76,   128,    73,    41,    59,   151,    87,
-    88,    89,    90,    91,    92,    93,    94,    95,    96,    97,
-    77,   114,   148,    40,    58,    56,   102,    57,   106,    59,
-   117,    32,    72,   121,   116,   100,    80,   109,    67,    48,
-    20,    36,    73,    30,    45,    73,    44,   118,   149,    84,
-    17,   126,    18,    46,    21,    47,   120,   119,   101,   145,
-   144,   125,    71,   123,    75,    39,    38,    12,     8,   108,
-   105,   136,    83,    74,   135,    24,     4,     3,   139,   140,
-     2,    81,   134,   141,   133,   130,   129,    42,   113,    16,
-     1,   146,   124,     0,   143,     0,     0,   152,     0,     0,
-     0,    86,     0,     0,     0,     0,     0,    13,     0,     0,
-   160,    14,     0,    15,   164,   163,     0,    19,   167,     0,
-     0,    23,    73,     0,     0,     0,     0,     0,   168,   166,
-   158,   171,   173,     0,     0,     0,   169,     0,     0,     0,
-     0,     0,     0,    61,    62,    53,    54,    55,    60,    61,
-    62,    53,    54,    55,    60,     0,     0,     0,     0,   103,
-    60,    49,     0,    98,    99,     0,     0,     0,     0,     0,
-    61,    62,    53,    54,    55,    60,    61,    62,    53,    54,
-    55,    60,     0,     0,     0,     0,     0,     0,     0,     0,
-     0,     0,    35,     0,     0,     0,     0,     0,    61,    62,
-    53,    54,    55,    60,    33,   122,    34,    23,     0,     0,
-    53,    54,    55,    60,     0,     0,    37,     0,     0,     0,
-   138,     0,     0,     0,     0,   142,     0,     0,     0,     0,
-     0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
-     0,     0,     0,   156,     0,     0,     0,     0,     0,     0,
+    64,    62,     6,    63,   152,    65,     7,    64,    62,   145,
+    63,   120,    65,    92,    64,    62,    89,    63,    57,    65,
+    58,    64,    62,    87,    63,    57,    65,    58,    64,    62,
+    24,    63,    57,    65,    58,    64,    62,    54,    63,    57,
+    65,    58,    45,    10,    29,   142,    57,   171,    58,    30,
+    29,   123,    66,   167,    14,    30,   160,   117,    15,    66,
+    16,   162,   163,   173,    19,   131,    66,   138,    24,    28,
+   112,   114,   130,    66,    74,    71,     8,    64,    66,    52,
+    66,    86,    65,    51,   161,    83,    51,    66,    43,   136,
+    27,    12,    64,    62,    26,    63,   133,    65,    49,    70,
+   135,   119,    84,   125,   124,    42,    72,   122,   109,    32,
+    53,   132,    79,    73,    85,    39,    75,    79,    47,    23,
+   149,    91,   143,    31,    78,    20,    88,    38,    50,    66,
+    11,    50,    95,    96,    97,    98,    99,   100,   101,   102,
+   103,   104,   105,   106,    66,    48,    36,   129,   128,   158,
+   113,   141,    94,    81,    79,    77,    18,    41,    40,    80,
+   139,    13,     9,   118,    90,    93,   121,    25,     5,     4,
+     3,     2,    22,   126,   111,    76,    82,    44,   134,   110,
+    21,    46,    17,     1,     0,     0,     0,     0,     0,     0,
+     0,     0,     0,     0,     0,   140,     0,     0,     0,     0,
+     0,     0,     0,     0,   147,   148,     0,   151,     0,   150,
+     0,     0,   153,   159,     0,   156,     0,     0,     0,     0,
+   164,   107,   108,     0,     0,     0,     0,     0,    79,   116,
+   170,   169,    55,    68,    69,    56,    59,    60,    61,    67,
+    68,    69,    56,    59,    60,    61,    67,    68,    69,    56,
+    59,    60,    61,    67,    68,    69,    56,    59,    60,    61,
+    67,   177,    35,    56,    59,    60,    61,    67,    35,   137,
+   127,   157,     0,   166,    67,    33,    34,    24,     0,     0,
+   146,    33,    34,   115,     0,     0,     0,    37,     0,     0,
+     0,   155,     0,    37,     0,     0,     0,   172,     0,     0,
+   144,     0,     0,     0,     0,     0,     0,   165,     0,     0,
+     0,     0,     0,   154,     0,     0,     0,     0,     0,     0,
+     0,     0,     0,     0,     0,     0,   174,     0,   176,     0,
+     0,     0,     0,     0,     0,     0,     0,     0,   168,     0,
      0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
-     0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
-   170,     0,     0,   172 };
+   175 };
 int yypact[]={
 
- -1000,  -234, -1000, -1000, -1000,  -244, -1000,    31,   -62, -1000,
- -1000, -1000, -1000,    24, -1000, -1000,    52, -1000, -1000,  -250,
- -1000, -1000, -1000, -1000,    89,    -9, -1000,    24,    24,    24,
- -1000,    88, -1000, -1000, -1000, -1000, -1000,    24,    24, -1000,
-    24,  -251,    49, -1000,   -28,    45,    86,  -252,  -257, -1000,
-    24,    24,    24,    24,    24,    24,    24,    24,    24,    24,
-    24, -1000, -1000,    84,    13, -1000, -1000,    24, -1000,   -15,
-  -224, -1000,    74, -1000, -1000, -1000,  -259,    24,    24,  -263,
-    24,   -12, -1000,    83,    76, -1000, -1000,   -30,   -30,   -30,
-   -30,   -30,   -30,    50,    50, -1000, -1000,    72, -1000, -1000,
- -1000,    82,    13, -1000,    24, -1000, -1000, -1000,    74,   -36,
- -1000,    53,    74, -1000,  -269,    24, -1000,  -265, -1000,    24,
-    24, -1000, -1000,    13,    31, -1000,    24, -1000, -1000,   -53,
-    68, -1000, -1000,   -13,    54,    13, -1000, -1000,  -218,    23,
-    23, -1000, -1000, -1000, -1000,  -237, -1000, -1000,  -269,    28,
- -1000,    24,  -226,  -228, -1000,    24,  -232,    24, -1000,    24,
-    13, -1000, -1000, -1000,   -42, -1000,    31,    13, -1000, -1000,
- -1000, -1000,  -218, -1000 };
+ -1000,  -268, -1000, -1000, -1000, -1000,  -230, -1000,    32,  -205,
+    36, -1000, -1000, -1000,     4, -1000, -1000,    44, -1000,  -231,
+ -1000,    78, -1000,    40, -1000,    70,  -236,   -28, -1000,     4,
+     4, -1000,    40, -1000, -1000, -1000, -1000,     4,   -49, -1000,
+     4, -1000,     4,  -243,    41, -1000, -1000,     4, -1000,  -250,
+     4,  -257, -1000,  -260, -1000, -1000,     4,     4,     4,     4,
+     4,     4,     4,     4,     4,     4,     4,     4, -1000, -1000,
+    67,   -21,   -16,   -16,    10,   -35,  -209, -1000,    57, -1000,
+ -1000,    37, -1000,  -262,     4,    66,    57, -1000,   -42, -1000,
+    63,    59, -1000,    70, -1000,    -7,    -7,    -7,    -7,    -7,
+    -7,    35,    35,   -16,   -16,   -16,    50, -1000, -1000, -1000,
+   -53,    52,    56,   -21, -1000,    28, -1000, -1000,  -223, -1000,
+ -1000,    57, -1000, -1000, -1000,  -264, -1000, -1000,     4,     4,
+ -1000, -1000, -1000,     4, -1000,  -269,     4, -1000, -1000,     4,
+    32, -1000, -1000,     4,  -211, -1000,  -200,   -14,   -14,  -269,
+   -21, -1000,    28,   -21, -1000, -1000,   -21, -1000,     4, -1000,
+ -1000,  -214, -1000, -1000,    56,  -220,    32, -1000, -1000,  -197,
+ -1000, -1000, -1000, -1000, -1000, -1000,  -200, -1000 };
 int yypgo[]={
 
-     0,   180,   191,    54,    61,    81,   179,   133,   178,   177,
-   176,   175,   174,   172,   121,   171,   170,    76,    59,   167,
-   166,   165,   162,   161,    50,   160,   158,   157,    48,    49,
-   156,   155,   131,   154,   152,   151,   150,   149,   148,   147,
-   146,   145,   144,   143,   141,   139,    71,   138,   136,   134 };
+     0,   183,   152,    69,   114,    81,   182,   181,   180,   179,
+   177,   176,    70,   174,   115,   172,    79,   171,    76,   130,
+   170,   169,   168,   167,   165,   164,   175,   163,   162,   161,
+    67,   160,    75,    84,   158,   157,   146,   155,   151,   149,
+   123,   109,   148,   147,   127,   122,   121,    65,   120,    71 };
 int yyr1[]={
 
-     0,     1,    16,     1,     1,     1,    21,    23,    19,    25,
-    25,    26,    17,    18,    18,    27,    30,    27,    31,    27,
-    27,    27,    27,    27,    29,    29,    29,    34,    35,    24,
-    36,    37,    36,     2,    28,     3,     3,     3,     3,     3,
+     0,     1,    17,     1,     1,     1,     1,    23,    20,    24,
+    21,    16,    27,    27,    19,    19,    28,    18,    31,    30,
+    29,    34,    29,    35,    29,    29,    29,    29,    33,    33,
+    33,    37,    26,    38,    39,    38,     2,    32,     3,     3,
      3,     3,     3,     3,     3,     3,     3,     3,     3,     3,
-     3,     3,     3,     3,     3,     3,     3,    39,     3,    40,
-     3,    41,     7,    38,    38,    43,    32,    42,     4,     4,
-     5,    44,     5,    22,    22,    45,    45,    15,    15,     8,
-     8,    10,    10,    11,    11,    47,    46,    12,    12,    13,
-    13,     6,     6,    14,    48,    14,    49,    14,     9,     9,
-    33,    33,    20 };
+     3,     3,     3,     3,     3,     3,     3,     3,     3,    42,
+     3,    43,     3,    44,    40,    36,     8,     8,     7,     7,
+     4,     4,     5,    45,     5,    25,    25,    46,    46,     9,
+     9,     9,    48,     9,    47,    47,    12,    12,    49,    13,
+    13,     6,     6,    14,    14,    14,    15,    41,    10,    10,
+    11,    11,    22 };
 int yyr2[]={
 
-     0,     0,     1,     9,     4,     4,     1,     1,    19,     0,
-     6,     1,     4,     0,     2,    17,     1,    17,     1,    13,
-     7,     3,     3,     7,     0,     4,    15,     1,     1,     9,
-     0,     1,     9,     1,     3,     7,     7,     7,     7,     7,
-     7,     7,     7,     7,     7,     7,     7,     5,     5,     3,
-     9,     3,     3,     3,     3,     3,     5,     1,    11,     1,
-    11,     1,     9,     1,     2,     1,    11,     3,     1,     3,
-     3,     1,     9,     0,     2,     3,     7,     1,     3,     7,
-     7,     1,     3,     3,     7,     1,     9,     1,     3,     3,
-     7,     3,     7,     3,     1,    11,     1,     9,     3,     7,
-     0,     4,     3 };
+     0,     0,     1,     9,     4,     4,     4,     1,     9,     1,
+    13,    11,     0,     6,     0,     2,     1,     4,     1,     4,
+    17,     1,    17,     1,    13,     7,     3,     7,     0,     4,
+    15,     1,     7,     0,     1,     9,     1,     3,     7,     7,
+     7,     7,     7,     7,     7,     7,     7,     7,     7,     7,
+     7,     5,     3,     3,     3,     3,     3,     3,     5,     1,
+    11,     1,    11,     1,     9,     5,     3,     7,     7,     3,
+     1,     3,     3,     1,     9,     1,     3,     3,     7,     1,
+     5,     5,     1,    11,     0,     2,     3,     7,     7,     3,
+     7,     3,     7,     3,     9,     7,     3,     3,     3,     7,
+     1,     5,     3 };
 int yychk[]={
 
- -1000,    -1,   -16,   -19,   -20,   271,   274,   -17,   -26,   273,
-   -18,    59,   -27,   259,   263,   265,    -6,   -32,    -7,   269,
-   -14,   -42,    64,   273,   -21,   -28,    -3,    40,    43,    45,
-    -7,    64,   -14,   270,   272,   258,   -32,   282,   -30,   -31,
-    61,    44,    -9,   273,   -48,   -49,   -43,   -41,    40,   260,
-    61,    60,    62,   277,   278,   279,    43,    45,    42,    47,
-   280,   275,   276,    -3,   -28,   -28,   -28,    40,   -28,   -28,
-   -24,   -34,    -5,    -3,   -14,   -33,    44,    61,    91,    46,
-    40,   -15,   273,   -22,   -45,   273,    -2,   -28,   -28,   -28,
-   -28,   -28,   -28,   -28,   -28,   -28,   -28,   -28,    -2,    -2,
-    41,   -38,   -28,   264,   266,   -25,    44,   273,    -5,   -28,
-   273,    -4,    -5,    -8,   123,    91,    41,    44,   -24,   -39,
-   -40,    41,    -2,   -28,   -17,   -35,   -44,    93,    41,   -10,
-   -11,   -46,   273,   -12,   -13,   -28,   -23,   273,    -2,   -28,
-   -28,   -24,    -2,   -18,   -36,   -37,    -3,   125,    44,   -47,
-    93,    44,   -24,   -29,   261,   262,    -2,   268,   -46,    61,
-   -28,   267,   267,   -24,   -28,   267,    -4,   -28,   260,   -18,
-    -2,   -24,    -2,   -29 };
+ -1000,    -1,   -17,   -20,   -21,   -22,   270,   274,   -18,   -28,
+   273,   -19,    59,   -29,   259,   263,   265,    -6,   -36,   269,
+   -14,    -8,   -15,   -41,   273,   -23,    58,   -32,    -3,    40,
+    45,   -40,   -41,   271,   272,   258,   -36,   283,   -44,   -14,
+   -34,   -35,    61,    44,   -10,   273,    -7,    40,   -40,    58,
+    91,    46,   -16,    40,   273,   260,   277,    60,    62,   278,
+   279,   280,    43,    45,    42,    47,    94,   281,   275,   276,
+    -3,   -32,   -32,   -32,   123,   -32,   -26,   -37,    -5,    -3,
+   -14,   -41,   -11,    44,    61,    -4,    -5,   273,   -32,   273,
+   -25,   -46,   273,   -24,    -2,   -32,   -32,   -32,   -32,   -32,
+   -32,   -32,   -32,   -32,   -32,   -32,   -32,    -2,    -2,    41,
+    -9,   -13,   -12,   -32,   -49,   273,   264,   266,   -27,    44,
+   273,    -5,    41,    93,    41,    44,   -16,   -26,   -42,   -43,
+   125,   -47,    59,    44,   -47,    44,    61,    -2,   -30,   -31,
+   -18,   -38,   268,   -45,   -26,   273,    -2,   -32,   -32,   -48,
+   -32,   -49,   273,   -32,   -26,    -2,   -32,   -19,   -39,    -3,
+   267,   -33,   261,   262,   -12,    -2,    -4,   267,   -26,   -30,
+   -47,   267,   -19,   260,    -2,   -26,    -2,   -33 };
 int yydef[]={
 
-     1,    -2,    11,     4,     5,     0,   102,    13,     0,     6,
-     3,    14,    12,     0,    16,    18,     0,    21,    22,     0,
-    -2,    65,    61,    93,     0,     0,    34,     0,     0,     0,
-    49,    61,    -2,    52,    53,    54,    55,     0,     0,    27,
-     0,     0,   100,    98,     0,     0,     0,    77,    73,    33,
-     0,     0,     0,     0,     0,     0,     0,     0,     0,     0,
-     0,    33,    33,    34,     0,    47,    48,    63,    56,     0,
-     0,     9,    20,    -2,    -2,    23,     0,     0,     0,     0,
-    68,     0,    78,     0,    74,    75,    27,    36,    37,    38,
-    39,    40,    41,    42,    43,    44,    45,    46,    57,    59,
-    35,     0,    64,    33,     0,    -2,    71,    99,   101,     0,
-    97,     0,    69,    62,    81,    87,     7,     0,    33,     0,
-     0,    50,    27,    33,    13,    -2,     0,    95,    66,     0,
-    82,    83,    85,     0,    88,    89,    27,    76,    24,    58,
-    60,    33,    19,    10,    29,     0,    -2,    79,     0,     0,
-    80,     0,     0,     0,    27,     0,     0,    68,    84,     0,
-    90,     8,    15,    25,     0,    17,    13,    86,    33,    32,
-    27,    33,    24,    26 };
+     1,    -2,    16,     4,     5,     6,     0,   102,    14,     0,
+     7,     3,    15,    17,    63,    21,    23,     0,    26,     0,
+    -2,    63,    93,    66,    96,     0,     0,     0,    37,    63,
+    63,    52,    -2,    54,    55,    56,    57,    63,     0,    97,
+    63,    31,    63,     0,   100,    98,    65,    -2,    69,     0,
+    63,     0,     8,    75,     9,    36,    63,    63,    63,    63,
+    63,    63,    63,    63,    63,    63,    63,    63,    36,    36,
+    37,     0,    51,    58,    -2,     0,     0,    12,    25,    -2,
+    -2,     0,    27,     0,    63,     0,    71,    67,     0,    95,
+     0,    76,    77,     0,    31,    39,    40,    41,    42,    43,
+    44,    45,    46,    47,    48,    49,    50,    59,    61,    38,
+     0,    84,    84,    89,    86,    96,    36,    18,    -2,    73,
+    99,   101,    68,    94,    31,     0,    10,    36,    63,    63,
+    64,    80,    82,    -2,    81,    85,    63,    31,    36,    63,
+    14,    32,    34,    63,     0,    78,    28,    60,    62,     0,
+    90,    87,     0,    88,    36,    24,    19,    13,    -2,    -2,
+    11,     0,    31,    18,    84,     0,    14,    20,    29,     0,
+    83,    22,    35,    36,    31,    36,    28,    30 };
 typedef struct { char *t_name; int t_val; } yytoktype;
 #ifndef YYDEBUG
 #	define YYDEBUG	0	/* don't allow debugging */
@@ -774,26 +882,27 @@ yytoktype yytoks[] =
 	"END",	267,
 	"RETURN",	268,
 	"LOCAL",	269,
-	"NUMBER",	270,
-	"FUNCTION",	271,
+	"FUNCTION",	270,
+	"NUMBER",	271,
 	"STRING",	272,
 	"NAME",	273,
 	"DEBUG",	274,
 	"AND",	275,
 	"OR",	276,
-	"=",	61,
-	"NE",	277,
+	"EQ",	277,
+	"NE",	278,
 	">",	62,
 	"<",	60,
-	"LE",	278,
-	"GE",	279,
-	"CONC",	280,
+	"LE",	279,
+	"GE",	280,
+	"CONC",	281,
 	"+",	43,
 	"-",	45,
 	"*",	42,
 	"/",	47,
-	"UNARY",	281,
-	"NOT",	282,
+	"UNARY",	282,
+	"NOT",	283,
+	"^",	94,
 	"-unknown-",	-1	/* ends search */
 };
 
@@ -804,38 +913,41 @@ char * yyreds[] =
 	"functionlist : functionlist",
 	"functionlist : functionlist stat sc",
 	"functionlist : functionlist function",
+	"functionlist : functionlist method",
 	"functionlist : functionlist setdebug",
 	"function : FUNCTION NAME",
-	"function : FUNCTION NAME '(' parlist ')'",
-	"function : FUNCTION NAME '(' parlist ')' block END",
+	"function : FUNCTION NAME body",
+	"method : FUNCTION NAME ':' NAME",
+	"method : FUNCTION NAME ':' NAME body",
+	"body : '(' parlist ')' block END",
 	"statlist : /* empty */",
 	"statlist : statlist stat sc",
-	"stat : /* empty */",
-	"stat : stat1",
 	"sc : /* empty */",
 	"sc : ';'",
+	"stat : /* empty */",
+	"stat : stat1",
+	"cond : /* empty */",
+	"cond : expr1",
 	"stat1 : IF expr1 THEN PrepJump block PrepJump elsepart END",
 	"stat1 : WHILE",
 	"stat1 : WHILE expr1 DO PrepJump block PrepJump END",
 	"stat1 : REPEAT",
-	"stat1 : REPEAT block UNTIL expr1 PrepJump",
+	"stat1 : REPEAT block UNTIL cond PrepJump",
 	"stat1 : varlist1 '=' exprlist1",
 	"stat1 : functioncall",
-	"stat1 : typeconstructor",
 	"stat1 : LOCAL localdeclist decinit",
 	"elsepart : /* empty */",
 	"elsepart : ELSE block",
-	"elsepart : ELSEIF expr1 THEN PrepJump block PrepJump elsepart",
+	"elsepart : ELSEIF cond THEN PrepJump block PrepJump elsepart",
 	"block : /* empty */",
-	"block : statlist",
 	"block : statlist ret",
 	"ret : /* empty */",
-	"ret : /* empty */",
+	"ret : RETURN",
 	"ret : RETURN exprlist sc",
 	"PrepJump : /* empty */",
 	"expr1 : expr",
 	"expr : '(' expr ')'",
-	"expr : expr1 '=' expr1",
+	"expr : expr1 EQ expr1",
 	"expr : expr1 '<' expr1",
 	"expr : expr1 '>' expr1",
 	"expr : expr1 NE expr1",
@@ -845,12 +957,11 @@ char * yyreds[] =
 	"expr : expr1 '-' expr1",
 	"expr : expr1 '*' expr1",
 	"expr : expr1 '/' expr1",
+	"expr : expr1 '^' expr1",
 	"expr : expr1 CONC expr1",
-	"expr : '+' expr1",
 	"expr : '-' expr1",
-	"expr : typeconstructor",
-	"expr : '@' '(' dimension ')'",
-	"expr : var",
+	"expr : table",
+	"expr : varexp",
 	"expr : NUMBER",
 	"expr : STRING",
 	"expr : NIL",
@@ -860,13 +971,13 @@ char * yyreds[] =
 	"expr : expr1 AND PrepJump expr1",
 	"expr : expr1 OR PrepJump",
 	"expr : expr1 OR PrepJump expr1",
-	"typeconstructor : '@'",
-	"typeconstructor : '@' objectname fieldlist",
-	"dimension : /* empty */",
-	"dimension : expr1",
-	"functioncall : functionvalue",
-	"functioncall : functionvalue '(' exprlist ')'",
-	"functionvalue : var",
+	"table : /* empty */",
+	"table : '{' fieldlist '}'",
+	"functioncall : funcvalue funcParams",
+	"funcvalue : varexp",
+	"funcvalue : varexp ':' NAME",
+	"funcParams : '(' exprlist ')'",
+	"funcParams : table",
 	"exprlist : /* empty */",
 	"exprlist : exprlist1",
 	"exprlist1 : expr",
@@ -876,27 +987,25 @@ char * yyreds[] =
 	"parlist : parlist1",
 	"parlist1 : NAME",
 	"parlist1 : parlist1 ',' NAME",
-	"objectname : /* empty */",
-	"objectname : NAME",
-	"fieldlist : '{' ffieldlist '}'",
-	"fieldlist : '[' lfieldlist ']'",
-	"ffieldlist : /* empty */",
-	"ffieldlist : ffieldlist1",
+	"fieldlist : /* empty */",
+	"fieldlist : lfieldlist1 lastcomma",
+	"fieldlist : ffieldlist1 lastcomma",
+	"fieldlist : lfieldlist1 ';'",
+	"fieldlist : lfieldlist1 ';' ffieldlist1 lastcomma",
+	"lastcomma : /* empty */",
+	"lastcomma : ','",
 	"ffieldlist1 : ffield",
 	"ffieldlist1 : ffieldlist1 ',' ffield",
-	"ffield : NAME",
 	"ffield : NAME '=' expr1",
-	"lfieldlist : /* empty */",
-	"lfieldlist : lfieldlist1",
 	"lfieldlist1 : expr1",
 	"lfieldlist1 : lfieldlist1 ',' expr1",
 	"varlist1 : var",
 	"varlist1 : varlist1 ',' var",
-	"var : NAME",
-	"var : var",
-	"var : var '[' expr1 ']'",
-	"var : var",
-	"var : var '.' NAME",
+	"var : singlevar",
+	"var : varexp '[' expr1 ']'",
+	"var : varexp '.' NAME",
+	"singlevar : NAME",
+	"varexp : var",
 	"localdeclist : NAME",
 	"localdeclist : localdeclist ',' NAME",
 	"decinit : /* empty */",
@@ -904,19 +1013,22 @@ char * yyreds[] =
 	"setdebug : DEBUG",
 };
 #endif /* YYDEBUG */
-#line 1 "/usr/lib/yaccpar"
+#line 1 "/usr/lang/SC1.0/yaccpar"
 /*	@(#)yaccpar 1.10 89/04/04 SMI; from S5R3 1.10	*/
 
 /*
 ** Skeleton parser driver for yacc output
 */
+/*
+	@(#)RELEASE SC1.0 C++ 2.1 1Mar1991
+*/
 
 /*
 ** yacc user known macros and defines
 */
 #define YYERROR		goto yyerrlab
-#define YYACCEPT	{ free(yys); free(yyv); return(0); }
-#define YYABORT		{ free(yys); free(yyv); return(1); }
+#define YYACCEPT	return(0)
+#define YYABORT		return(1)
 #define YYBACKUP( newtoken, newvalue )\
 {\
 	if ( yychar >= 0 || ( yyr2[ yytmp ] >> 1 ) != 1 )\
@@ -930,10 +1042,24 @@ char * yyreds[] =
 	goto yynewstate;\
 }
 #define YYRECOVERING()	(!!yyerrflag)
+#define YYCOPY(to, from, type) \
+	(type *) memcpy(to, (char *) from, yynewmax * sizeof(type))
 #ifndef YYDEBUG
 #	define YYDEBUG	1	/* make debugging available */
 #endif
 
+
+/*
+** extern declarations for C++ - check your own code for correctness
+** if you have function redefined error messages here.
+*/
+
+#ifdef __cplusplus
+EXTERN_FUNCTION ( extern int printf,    (const char*, DOTDOTDOT) );
+EXTERN_FUNCTION ( extern void *memcpy,  (void *, const void *, int) );
+#endif
+
+
 /*
 ** user known globals
 */
@@ -947,8 +1073,8 @@ int yydebug;			/* set to 1 to get debugging */
 /*
 ** static variables used by the parser
 */
-static YYSTYPE *yyv;			/* value stack */
-static int *yys;			/* state stack */
+static YYSTYPE yy_yyv[YYMAXDEPTH], *yyv = yy_yyv;	/* value stack */
+static int yy_yys[YYMAXDEPTH], *yys = yy_yys;	/* state stack */
 
 static YYSTYPE *yypv;			/* top of value stack */
 static int *yyps;			/* top of state stack */
@@ -956,10 +1082,20 @@ static int *yyps;			/* top of state stack */
 static int yystate;			/* current state */
 static int yytmp;			/* extra var (lasts between blocks) */
 
+#if defined(__cplusplus) || defined(__STDC__) || defined(lint)
+static int __yaccpar_lint_hack__ = 0;   
+				/* if you change the value from 0 to
+				something else, make sure you know
+				what to do with yyerrlab reference.
+				This is a hack - to make sure C++ and
+				lint are happy with the 4.1 yacc code. */
+#endif
+
 int yynerrs;			/* number of errors */
 
 int yyerrflag;			/* error recovery flag */
 int yychar;			/* current input token number */
+static unsigned yymaxdepth = YYMAXDEPTH;
 
 
 /*
@@ -968,19 +1104,12 @@ int yychar;			/* current input token number */
 int
 yyparse()
 {
-	register YYSTYPE *yypvt;	/* top of value stack for $vars */
-	unsigned yymaxdepth = YYMAXDEPTH;
+        register YYSTYPE *yypvt = (YYSTYPE*)0 ;        /* top of value stack for
+$vars */
 
 	/*
 	** Initialize externals - yyparse may be called more than once
 	*/
-	yyv = (YYSTYPE*)malloc(yymaxdepth*sizeof(YYSTYPE));
-	yys = (int*)malloc(yymaxdepth*sizeof(int));
-	if (!yyv || !yys)
-	{
-		yyerror( "out of memory" );
-		return(1);
-	}
 	yypv = &yyv[-1];
 	yyps = &yys[-1];
 	yystate = 0;
@@ -989,13 +1118,26 @@ yyparse()
 	yyerrflag = 0;
 	yychar = -1;
 
-	goto yystack;
+#if defined(__cplusplus) || defined(__STDC__) || defined(lint)
+/*
+   Note that the following can never be executed but simply to please
+   lint and C++
+ */
+	switch (__yaccpar_lint_hack__)
+	{
+		case 1: goto yyerrlab;
+		case 2: goto yynewstate;
+	}
+#endif
+
 	{
 		register YYSTYPE *yy_pv;	/* top of value stack */
 		register int *yy_ps;		/* top of state stack */
 		register int yy_state;		/* current state */
 		register int  yy_n;		/* internal state number info */
 
+	goto yystack;
+
 		/*
 		** get globals into registers.
 		** branch to here only if YYBACKUP was called.
@@ -1052,26 +1194,47 @@ yyparse()
 #endif /* YYDEBUG */
 		if ( ++yy_ps >= &yys[ yymaxdepth ] )	/* room on stack? */
 		{
-			/*
-			** reallocate and recover.  Note that pointers
-			** have to be reset, or bad things will happen
-			*/
-			int yyps_index = (yy_ps - yys);
-			int yypv_index = (yy_pv - yyv);
-			int yypvt_index = (yypvt - yyv);
-			yymaxdepth += YYMAXDEPTH;
-			yyv = (YYSTYPE*)realloc((char*)yyv,
-				yymaxdepth * sizeof(YYSTYPE));
-			yys = (int*)realloc((char*)yys,
-				yymaxdepth * sizeof(int));
-			if (!yyv || !yys)
+                        /*
+                        ** reallocate and recover.  Note that pointers
+                        ** have to be reset, or bad things will happen
+                        */ 
+                        int yyps_index = (yy_ps - yys);
+                        int yypv_index = (yy_pv - yyv);
+                        int yypvt_index = (yypvt - yyv);
+                        int yynewmax;
+
+			yynewmax = yymaxdepth + YYMAXDEPTH;
+			if (yymaxdepth == YYMAXDEPTH)	/* first time growth */
+			{
+				YYSTYPE *newyyv = (YYSTYPE*)malloc(yynewmax*sizeof(YYSTYPE));
+				int *newyys = (int*)malloc(yynewmax*sizeof(int));
+				if (newyys != 0 && newyyv != 0)
+				{
+					yys = YYCOPY(newyys, yys, int);
+					yyv = YYCOPY(newyyv, yyv, YYSTYPE);
+				}
+				else
+					yynewmax = 0;	/* failed */
+			}
+			else				/* not first time */
+			{
+				yyv = (YYSTYPE*)realloc((char*)yyv,
+                                	yynewmax * sizeof(YYSTYPE));
+				yys = (int*)realloc((char*)yys,
+					yynewmax * sizeof(int));
+				if (yys == 0 || yyv == 0)
+					yynewmax = 0;	/* failed */
+			}
+			if (yynewmax <= yymaxdepth)	/* tables not expanded */
 			{
 				yyerror( "yacc stack overflow" );
-				return(1);
+				YYABORT;
 			}
-			yy_ps = yys + yyps_index;
-			yy_pv = yyv + yypv_index;
-			yypvt = yyv + yypvt_index;
+			yymaxdepth = yynewmax;
+
+                        yy_ps = yys + yyps_index;
+                        yy_pv = yyv + yypv_index;
+                        yypvt = yyv + yypvt_index;
 		}
 		*yy_ps = yy_state;
 		*++yy_pv = yyval;
@@ -1292,7 +1455,7 @@ yyparse()
 				yy_n, yyreds[ yy_n ] );
 #endif
 		yytmp = yy_n;			/* value to switch over */
-		yypvt = yy_pv;			/* $vars top of value stack */
+                yypvt = yy_pv;                  /* $vars top of value stack */
 		/*
 		** Look in goto table for next state
 		** Sorry about using yy_state here as temporary
@@ -1345,466 +1508,393 @@ yyparse()
 	{
 		
 case 2:
-# line 227 "lua.stx"
+# line 411 "lua.stx"
 {
-	  	  pc=maincode; basepc=initcode; maxcurr=maxmain;
+	  	  pc=maincode; basepc=*initcode; maxcurr=maxmain;
 		  nlocalvar=0;
 	        } break;
 case 3:
-# line 232 "lua.stx"
+# line 416 "lua.stx"
 {
-		  maincode=pc; initcode=basepc; maxmain=maxcurr;
+		  maincode=pc; *initcode=basepc; maxmain=maxcurr;
 		} break;
-case 6:
-# line 240 "lua.stx"
-{
-		if (code == NULL)	/* first function */
-		{
-		 code = (Byte *) calloc(GAPCODE, sizeof(Byte));
-		 if (code == NULL)
-		 {
-		  lua_error("not enough memory");
-		  err = 1;
-		 }
-		 maxcode = GAPCODE;
-		}
-		pc=0; basepc=code; maxcurr=maxcode; 
-		nlocalvar=0;
-		yyval.vWord = lua_findsymbol(yypvt[-0].pChar); 
-	       } break;
 case 7:
-# line 256 "lua.stx"
+# line 425 "lua.stx"
 {
-	        if (lua_debug)
-		{
-	         code_byte(SETFUNCTION); 
-                 code_word(lua_nfile-1);
-		 code_word(yypvt[-3].vWord);
-		}
-	        lua_codeadjust (0);
+		init_function(yypvt[-0].pNode);
 	       } break;
 case 8:
-# line 267 "lua.stx"
+# line 429 "lua.stx"
 { 
-                if (lua_debug) code_byte(RESET); 
-	        code_byte(RETCODE); code_byte(nlocalvar);
-	        s_tag(yypvt[-6].vWord) = T_FUNCTION;
-	        s_bvalue(yypvt[-6].vWord) = calloc (pc, sizeof(Byte));
-		if (s_bvalue(yypvt[-6].vWord) == NULL)
-		{
-		 lua_error("not enough memory");
-		 err = 1;
-		}
-	        memcpy (s_bvalue(yypvt[-6].vWord), basepc, pc*sizeof(Byte));
-		code = basepc; maxcode=maxcurr;
-#if LISTING
-PrintCode(code,code+pc);
-#endif
+		Word func = luaI_findsymbol(yypvt[-2].pNode);
+	        s_tag(func) = LUA_T_FUNCTION;
+	        s_bvalue(func) = yypvt[-0].pByte;
 	       } break;
-case 11:
-# line 289 "lua.stx"
+case 9:
+# line 437 "lua.stx"
 {
-            ntemp = 0; 
-            if (lua_debug)
-            {
-             code_byte(SETLINE); code_word(lua_linenumber);
-            }
-	   } break;
-case 15:
-# line 302 "lua.stx"
+		init_function(yypvt[-0].pNode);
+	        localvar[nlocalvar]=luaI_findsymbolbyname("self");
+	        add_nlocalvar(1);
+	       } break;
+case 10:
+# line 443 "lua.stx"
 {
-        {
-	 Word elseinit = yypvt[-2].vWord+sizeof(Word)+1;
-	 if (pc - elseinit == 0)		/* no else */
-	 {
-	  pc -= sizeof(Word)+1;
-	  elseinit = pc;
-	 }
-	 else
-	 {
-	  basepc[yypvt[-2].vWord] = JMP;
-	  code_word_at(basepc+yypvt[-2].vWord+1, pc - elseinit);
-	 }
-	 basepc[yypvt[-4].vWord] = IFFJMP;
-	 code_word_at(basepc+yypvt[-4].vWord+1,elseinit-(yypvt[-4].vWord+sizeof(Word)+1));
-	}
-       } break;
+	        /* assign function to table field */
+	        pc=maincode; basepc=*initcode; maxcurr=maxmain;
+	        nlocalvar=0;
+		lua_pushvar(luaI_findsymbol(yypvt[-4].pNode)+1);
+                code_byte(PUSHSTRING);
+		code_word(luaI_findconstant(yypvt[-2].pNode));
+                code_byte(PUSHFUNCTION);
+                code_code(yypvt[-0].pByte);
+                code_byte(STOREINDEXED0);
+		maincode=pc; *initcode=basepc; maxmain=maxcurr;
+	       } break;
+case 11:
+# line 458 "lua.stx"
+{
+          codereturn();
+	  yyval.pByte = newvector(pc, Byte);
+	  memcpy(yyval.pByte, basepc, pc*sizeof(Byte));
+	  funcCode = basepc; maxcode=maxcurr;
+#if LISTING
+                PrintCode(funcCode,funcCode+pc);
+#endif
+	} break;
 case 16:
-# line 320 "lua.stx"
-{yyval.vWord=pc;} break;
-case 17:
-# line 322 "lua.stx"
+# line 475 "lua.stx"
+{ codedebugline(); } break;
+case 18:
+# line 477 "lua.stx"
+{ codedebugline(); } break;
+case 20:
+# line 480 "lua.stx"
+{ codeIf(yypvt[-4].vLong, yypvt[-2].vLong); } break;
+case 21:
+# line 482 "lua.stx"
+{yyval.vLong=pc;} break;
+case 22:
+# line 483 "lua.stx"
 {
-        basepc[yypvt[-3].vWord] = IFFJMP;
-	code_word_at(basepc+yypvt[-3].vWord+1, pc - (yypvt[-3].vWord + sizeof(Word)+1));
-        
-        basepc[yypvt[-1].vWord] = UPJMP;
-	code_word_at(basepc+yypvt[-1].vWord+1, pc - (yypvt[-6].vWord));
+        basepc[yypvt[-3].vLong] = IFFJMP;
+	code_word_at(basepc+yypvt[-3].vLong+1, pc - (yypvt[-3].vLong + sizeof(Word)+1));
+        basepc[yypvt[-1].vLong] = UPJMP;
+	code_word_at(basepc+yypvt[-1].vLong+1, pc - (yypvt[-6].vLong));
        } break;
-case 18:
-# line 330 "lua.stx"
-{yyval.vWord=pc;} break;
-case 19:
-# line 332 "lua.stx"
+case 23:
+# line 490 "lua.stx"
+{yyval.vLong=pc;} break;
+case 24:
+# line 491 "lua.stx"
 {
-        basepc[yypvt[-0].vWord] = IFFUPJMP;
-	code_word_at(basepc+yypvt[-0].vWord+1, pc - (yypvt[-4].vWord));
+        basepc[yypvt[-0].vLong] = IFFUPJMP;
+	code_word_at(basepc+yypvt[-0].vLong+1, pc - (yypvt[-4].vLong));
        } break;
-case 20:
-# line 339 "lua.stx"
+case 25:
+# line 497 "lua.stx"
 {
         {
          int i;
-         if (yypvt[-0].vInt == 0 || nvarbuffer != ntemp - yypvt[-2].vInt * 2)
-	  lua_codeadjust (yypvt[-2].vInt * 2 + nvarbuffer);
+         adjust_mult_assign(nvarbuffer, yypvt[-0].vInt, yypvt[-2].vInt * 2 + nvarbuffer);
 	 for (i=nvarbuffer-1; i>=0; i--)
 	  lua_codestore (i);
 	 if (yypvt[-2].vInt > 1 || (yypvt[-2].vInt == 1 && varbuffer[0] != 0))
 	  lua_codeadjust (0);
 	}
        } break;
-case 21:
-# line 350 "lua.stx"
-{ lua_codeadjust (0); } break;
-case 22:
-# line 351 "lua.stx"
-{ lua_codeadjust (0); } break;
-case 23:
-# line 352 "lua.stx"
-{ add_nlocalvar(yypvt[-1].vInt); lua_codeadjust (0); } break;
 case 26:
-# line 358 "lua.stx"
-{
-          {
-  	   Word elseinit = yypvt[-1].vWord+sizeof(Word)+1;
-  	   if (pc - elseinit == 0)		/* no else */
-  	   {
-  	    pc -= sizeof(Word)+1;
-	    elseinit = pc;
-	   }
-	   else
-	   {
-	    basepc[yypvt[-1].vWord] = JMP;
-	    code_word_at(basepc+yypvt[-1].vWord+1, pc - elseinit);
-	   }
-	   basepc[yypvt[-3].vWord] = IFFJMP;
-	   code_word_at(basepc+yypvt[-3].vWord+1, elseinit - (yypvt[-3].vWord + sizeof(Word)+1));
-	  }  
-         } break;
+# line 507 "lua.stx"
+{ code_byte(0); } break;
 case 27:
-# line 377 "lua.stx"
+# line 509 "lua.stx"
+{ add_nlocalvar(yypvt[-1].vInt);
+	  adjust_mult_assign(yypvt[-1].vInt, yypvt[-0].vInt, 0);
+	 } break;
+case 30:
+# line 517 "lua.stx"
+{ codeIf(yypvt[-3].vLong, yypvt[-1].vLong); } break;
+case 31:
+# line 520 "lua.stx"
 {yyval.vInt = nlocalvar;} break;
-case 28:
-# line 377 "lua.stx"
-{ntemp = 0;} break;
-case 29:
-# line 378 "lua.stx"
+case 32:
+# line 521 "lua.stx"
 {
-	  if (nlocalvar != yypvt[-3].vInt)
+	  if (nlocalvar != yypvt[-2].vInt)
 	  {
-           nlocalvar = yypvt[-3].vInt;
+           nlocalvar = yypvt[-2].vInt;
 	   lua_codeadjust (0);
 	  }
          } break;
-case 31:
-# line 388 "lua.stx"
-{ if (lua_debug){code_byte(SETLINE);code_word(lua_linenumber);}} break;
-case 32:
-# line 390 "lua.stx"
-{ 
-           if (lua_debug) code_byte(RESET); 
-           code_byte(RETCODE); code_byte(nlocalvar);
+case 34:
+# line 531 "lua.stx"
+{ codedebugline(); } break;
+case 35:
+# line 532 "lua.stx"
+{
+           if (yypvt[-1].vInt < 0) code_byte(MULT_RET);
+           codereturn();
           } break;
-case 33:
-# line 397 "lua.stx"
+case 36:
+# line 539 "lua.stx"
 { 
-	  yyval.vWord = pc;
+	  yyval.vLong = pc;
 	  code_byte(0);		/* open space */
 	  code_word (0);
          } break;
-case 34:
-# line 403 "lua.stx"
-{ if (yypvt[-0].vInt == 0) {lua_codeadjust (ntemp+1); incr_ntemp();}} break;
-case 35:
-# line 406 "lua.stx"
-{ yyval.vInt = yypvt[-1].vInt; } break;
-case 36:
-# line 407 "lua.stx"
-{ code_byte(EQOP);   yyval.vInt = 1; ntemp--;} break;
 case 37:
-# line 408 "lua.stx"
-{ code_byte(LTOP);   yyval.vInt = 1; ntemp--;} break;
+# line 545 "lua.stx"
+{ if (yypvt[-0].vInt == 0) code_byte(1); } break;
 case 38:
-# line 409 "lua.stx"
-{ code_byte(LEOP); code_byte(NOTOP); yyval.vInt = 1; ntemp--;} break;
+# line 548 "lua.stx"
+{ yyval.vInt = yypvt[-1].vInt; } break;
 case 39:
-# line 410 "lua.stx"
-{ code_byte(EQOP); code_byte(NOTOP); yyval.vInt = 1; ntemp--;} break;
+# line 549 "lua.stx"
+{ code_byte(EQOP);   yyval.vInt = 1; } break;
 case 40:
-# line 411 "lua.stx"
-{ code_byte(LEOP);   yyval.vInt = 1; ntemp--;} break;
+# line 550 "lua.stx"
+{ code_byte(LTOP);   yyval.vInt = 1; } break;
 case 41:
-# line 412 "lua.stx"
-{ code_byte(LTOP); code_byte(NOTOP); yyval.vInt = 1; ntemp--;} break;
+# line 551 "lua.stx"
+{ code_byte(GTOP);   yyval.vInt = 1; } break;
 case 42:
-# line 413 "lua.stx"
-{ code_byte(ADDOP);  yyval.vInt = 1; ntemp--;} break;
+# line 552 "lua.stx"
+{ code_byte(EQOP); code_byte(NOTOP); yyval.vInt = 1; } break;
 case 43:
-# line 414 "lua.stx"
-{ code_byte(SUBOP);  yyval.vInt = 1; ntemp--;} break;
+# line 553 "lua.stx"
+{ code_byte(LEOP);   yyval.vInt = 1; } break;
 case 44:
-# line 415 "lua.stx"
-{ code_byte(MULTOP); yyval.vInt = 1; ntemp--;} break;
+# line 554 "lua.stx"
+{ code_byte(GEOP);   yyval.vInt = 1; } break;
 case 45:
-# line 416 "lua.stx"
-{ code_byte(DIVOP);  yyval.vInt = 1; ntemp--;} break;
+# line 555 "lua.stx"
+{ code_byte(ADDOP);  yyval.vInt = 1; } break;
 case 46:
-# line 417 "lua.stx"
-{ code_byte(CONCOP);  yyval.vInt = 1; ntemp--;} break;
+# line 556 "lua.stx"
+{ code_byte(SUBOP);  yyval.vInt = 1; } break;
 case 47:
-# line 418 "lua.stx"
-{ yyval.vInt = 1; } break;
+# line 557 "lua.stx"
+{ code_byte(MULTOP); yyval.vInt = 1; } break;
 case 48:
-# line 419 "lua.stx"
-{ code_byte(MINUSOP); yyval.vInt = 1;} break;
+# line 558 "lua.stx"
+{ code_byte(DIVOP);  yyval.vInt = 1; } break;
 case 49:
-# line 420 "lua.stx"
-{ yyval.vInt = yypvt[-0].vInt; } break;
+# line 559 "lua.stx"
+{ code_byte(POWOP);  yyval.vInt = 1; } break;
 case 50:
-# line 422 "lua.stx"
-{ 
-      code_byte(CREATEARRAY);
-      yyval.vInt = 1;
-     } break;
+# line 560 "lua.stx"
+{ code_byte(CONCOP);  yyval.vInt = 1; } break;
 case 51:
-# line 426 "lua.stx"
-{ lua_pushvar (yypvt[-0].vLong); yyval.vInt = 1;} break;
+# line 561 "lua.stx"
+{ code_byte(MINUSOP); yyval.vInt = 1;} break;
 case 52:
-# line 427 "lua.stx"
-{ code_number(yypvt[-0].vFloat); yyval.vInt = 1; } break;
+# line 562 "lua.stx"
+{ yyval.vInt = 1; } break;
 case 53:
-# line 429 "lua.stx"
+# line 563 "lua.stx"
+{ yyval.vInt = 1;} break;
+case 54:
+# line 564 "lua.stx"
+{ code_number(yypvt[-0].vFloat); yyval.vInt = 1; } break;
+case 55:
+# line 566 "lua.stx"
 {
       code_byte(PUSHSTRING);
       code_word(yypvt[-0].vWord);
       yyval.vInt = 1;
-      incr_ntemp();
-     } break;
-case 54:
-# line 435 "lua.stx"
-{code_byte(PUSHNIL); yyval.vInt = 1; incr_ntemp();} break;
-case 55:
-# line 437 "lua.stx"
-{
-      yyval.vInt = 0;
-      if (lua_debug)
-      {
-       code_byte(SETLINE); code_word(lua_linenumber);
-      }
      } break;
 case 56:
-# line 444 "lua.stx"
-{ code_byte(NOTOP);  yyval.vInt = 1;} break;
+# line 571 "lua.stx"
+{code_byte(PUSHNIL); yyval.vInt = 1; } break;
 case 57:
-# line 445 "lua.stx"
-{code_byte(POP); ntemp--;} break;
+# line 572 "lua.stx"
+{ yyval.vInt = 0; } break;
 case 58:
-# line 446 "lua.stx"
-{ 
-      basepc[yypvt[-2].vWord] = ONFJMP;
-      code_word_at(basepc+yypvt[-2].vWord+1, pc - (yypvt[-2].vWord + sizeof(Word)+1));
-      yyval.vInt = 1;
-     } break;
+# line 573 "lua.stx"
+{ code_byte(NOTOP);  yyval.vInt = 1;} break;
 case 59:
-# line 451 "lua.stx"
-{code_byte(POP); ntemp--;} break;
+# line 574 "lua.stx"
+{code_byte(POP); } break;
 case 60:
-# line 452 "lua.stx"
+# line 575 "lua.stx"
 { 
-      basepc[yypvt[-2].vWord] = ONTJMP;
-      code_word_at(basepc+yypvt[-2].vWord+1, pc - (yypvt[-2].vWord + sizeof(Word)+1));
+      basepc[yypvt[-2].vLong] = ONFJMP;
+      code_word_at(basepc+yypvt[-2].vLong+1, pc - (yypvt[-2].vLong + sizeof(Word)+1));
       yyval.vInt = 1;
      } break;
 case 61:
-# line 460 "lua.stx"
+# line 580 "lua.stx"
+{code_byte(POP); } break;
+case 62:
+# line 581 "lua.stx"
+{ 
+      basepc[yypvt[-2].vLong] = ONTJMP;
+      code_word_at(basepc+yypvt[-2].vLong+1, pc - (yypvt[-2].vLong + sizeof(Word)+1));
+      yyval.vInt = 1;
+     } break;
+case 63:
+# line 589 "lua.stx"
 {
-      code_byte(PUSHBYTE);
-      yyval.vWord = pc; code_byte(0);
-      incr_ntemp();
       code_byte(CREATEARRAY);
+      yyval.vLong = pc; code_word(0);
      } break;
-case 62:
-# line 467 "lua.stx"
+case 64:
+# line 594 "lua.stx"
 {
-      basepc[yypvt[-2].vWord] = yypvt[-0].vInt; 
-      if (yypvt[-1].vLong < 0)	/* there is no function to be called */
-      {
-       yyval.vInt = 1;
-      }
-      else
-      {
-       lua_pushvar (yypvt[-1].vLong+1);
-       code_byte(PUSHMARK);
-       incr_ntemp();
-       code_byte(PUSHOBJECT);
-       incr_ntemp();
-       code_byte(CALLFUNC); 
-       ntemp -= 4;
-       yyval.vInt = 0;
-       if (lua_debug)
-       {
-        code_byte(SETLINE); code_word(lua_linenumber);
-       }
-      }
+      code_word_at(basepc+yypvt[-3].vLong, yypvt[-1].vInt);
      } break;
-case 63:
-# line 491 "lua.stx"
-{ code_byte(PUSHNIL); incr_ntemp();} break;
 case 65:
-# line 495 "lua.stx"
-{code_byte(PUSHMARK); yyval.vInt = ntemp; incr_ntemp();} break;
+# line 600 "lua.stx"
+{ code_byte(CALLFUNC); code_byte(yypvt[-1].vInt+yypvt[-0].vInt); } break;
 case 66:
-# line 496 "lua.stx"
-{ code_byte(CALLFUNC); ntemp = yypvt[-3].vInt-1;} break;
+# line 603 "lua.stx"
+{ yyval.vInt = 0; } break;
 case 67:
-# line 498 "lua.stx"
-{lua_pushvar (yypvt[-0].vLong); } break;
+# line 605 "lua.stx"
+{ 
+               code_byte(PUSHSELF); 
+	       code_word(luaI_findconstant(yypvt[-0].pNode));
+               yyval.vInt = 1;
+	     } break;
 case 68:
-# line 501 "lua.stx"
-{ yyval.vInt = 1; } break;
+# line 613 "lua.stx"
+{ if (yypvt[-1].vInt<0) { code_byte(1); yyval.vInt = -yypvt[-1].vInt; } else yyval.vInt = yypvt[-1].vInt; } break;
 case 69:
-# line 502 "lua.stx"
-{ yyval.vInt = yypvt[-0].vInt; } break;
+# line 614 "lua.stx"
+{ yyval.vInt = 1; } break;
 case 70:
-# line 505 "lua.stx"
-{ yyval.vInt = yypvt[-0].vInt; } break;
+# line 617 "lua.stx"
+{ yyval.vInt = 0; } break;
 case 71:
-# line 506 "lua.stx"
-{if (!yypvt[-1].vInt){lua_codeadjust (ntemp+1); incr_ntemp();}} break;
+# line 618 "lua.stx"
+{ yyval.vInt = yypvt[-0].vInt; } break;
 case 72:
-# line 507 "lua.stx"
-{yyval.vInt = yypvt[-0].vInt;} break;
+# line 621 "lua.stx"
+{ if (yypvt[-0].vInt == 0) yyval.vInt = -1; else yyval.vInt = 1; } break;
+case 73:
+# line 622 "lua.stx"
+{ if (yypvt[-1].vInt < 0) code_byte(1); } break;
+case 74:
+# line 623 "lua.stx"
+{
+          int r = yypvt[-3].vInt < 0 ? -yypvt[-3].vInt : yypvt[-3].vInt;
+          yyval.vInt = (yypvt[-0].vInt == 0) ? -(r+1) : r+1;
+	} break;
 case 75:
-# line 515 "lua.stx"
+# line 629 "lua.stx"
+{ lua_codeadjust(0); } break;
+case 76:
+# line 630 "lua.stx"
+{ lua_codeadjust(0); } break;
+case 77:
+# line 634 "lua.stx"
 {
-		 localvar[nlocalvar]=lua_findsymbol(yypvt[-0].pChar); 
+		 localvar[nlocalvar]=luaI_findsymbol(yypvt[-0].pNode); 
 		 add_nlocalvar(1);
 		} break;
-case 76:
-# line 520 "lua.stx"
+case 78:
+# line 639 "lua.stx"
 {
-		 localvar[nlocalvar]=lua_findsymbol(yypvt[-0].pChar); 
+		 localvar[nlocalvar]=luaI_findsymbol(yypvt[-0].pNode); 
 		 add_nlocalvar(1);
 		} break;
-case 77:
-# line 526 "lua.stx"
-{yyval.vLong=-1;} break;
-case 78:
-# line 527 "lua.stx"
-{yyval.vLong=lua_findsymbol(yypvt[-0].pChar);} break;
 case 79:
-# line 531 "lua.stx"
-{ 
-	       flush_record(yypvt[-1].vInt%FIELDS_PER_FLUSH); 
-	       yyval.vInt = yypvt[-1].vInt;
-	      } break;
+# line 645 "lua.stx"
+{ yyval.vInt =  0; } break;
 case 80:
-# line 536 "lua.stx"
-{ 
-	       flush_list(yypvt[-1].vInt/FIELDS_PER_FLUSH, yypvt[-1].vInt%FIELDS_PER_FLUSH);
-	       yyval.vInt = yypvt[-1].vInt;
-     	      } break;
+# line 647 "lua.stx"
+{ yyval.vInt = yypvt[-1].vInt; flush_list(yypvt[-1].vInt/FIELDS_PER_FLUSH, yypvt[-1].vInt%FIELDS_PER_FLUSH); } break;
 case 81:
-# line 542 "lua.stx"
-{ yyval.vInt = 0; } break;
+# line 649 "lua.stx"
+{ yyval.vInt = yypvt[-1].vInt; flush_record(yypvt[-1].vInt%FIELDS_PER_FLUSH); } break;
 case 82:
-# line 543 "lua.stx"
-{ yyval.vInt = yypvt[-0].vInt; } break;
+# line 651 "lua.stx"
+{ flush_list(yypvt[-1].vInt/FIELDS_PER_FLUSH, yypvt[-1].vInt%FIELDS_PER_FLUSH); } break;
 case 83:
-# line 546 "lua.stx"
+# line 653 "lua.stx"
+{ yyval.vInt = yypvt[-4].vInt+yypvt[-1].vInt; flush_record(yypvt[-1].vInt%FIELDS_PER_FLUSH); } break;
+case 86:
+# line 660 "lua.stx"
 {yyval.vInt=1;} break;
-case 84:
-# line 548 "lua.stx"
+case 87:
+# line 662 "lua.stx"
 {
 		  yyval.vInt=yypvt[-2].vInt+1;
 		  if (yyval.vInt%FIELDS_PER_FLUSH == 0) flush_record(FIELDS_PER_FLUSH);
 		} break;
-case 85:
-# line 554 "lua.stx"
-{yyval.vWord = lua_findconstant(yypvt[-0].pChar);} break;
-case 86:
-# line 555 "lua.stx"
+case 88:
+# line 669 "lua.stx"
 { 
-	       push_field(yypvt[-2].vWord);
+	       push_field(luaI_findconstant(yypvt[-2].pNode));
 	      } break;
-case 87:
-# line 560 "lua.stx"
-{ yyval.vInt = 0; } break;
-case 88:
-# line 561 "lua.stx"
-{ yyval.vInt = yypvt[-0].vInt; } break;
 case 89:
-# line 564 "lua.stx"
+# line 674 "lua.stx"
 {yyval.vInt=1;} break;
 case 90:
-# line 566 "lua.stx"
+# line 676 "lua.stx"
 {
 		  yyval.vInt=yypvt[-2].vInt+1;
 		  if (yyval.vInt%FIELDS_PER_FLUSH == 0) 
 		    flush_list(yyval.vInt/FIELDS_PER_FLUSH - 1, FIELDS_PER_FLUSH);
 		} break;
 case 91:
-# line 574 "lua.stx"
+# line 684 "lua.stx"
 {
 	   nvarbuffer = 0; 
            varbuffer[nvarbuffer] = yypvt[-0].vLong; incr_nvarbuffer();
 	   yyval.vInt = (yypvt[-0].vLong == 0) ? 1 : 0;
 	  } break;
 case 92:
-# line 580 "lua.stx"
+# line 690 "lua.stx"
 { 
            varbuffer[nvarbuffer] = yypvt[-0].vLong; incr_nvarbuffer();
 	   yyval.vInt = (yypvt[-0].vLong == 0) ? yypvt[-2].vInt + 1 : yypvt[-2].vInt;
 	  } break;
 case 93:
-# line 587 "lua.stx"
+# line 696 "lua.stx"
+{ yyval.vLong = yypvt[-0].vLong; } break;
+case 94:
+# line 698 "lua.stx"
 {
-	   Word s = lua_findsymbol(yypvt[-0].pChar);
-	   int local = lua_localname (s);
-	   if (local == -1)	/* global var */
-	    yyval.vLong = s + 1;		/* return positive value */
-           else
-	    yyval.vLong = -(local+1);		/* return negative value */
+	   yyval.vLong = 0;		/* indexed variable */
 	  } break;
-case 94:
-# line 596 "lua.stx"
-{lua_pushvar (yypvt[-0].vLong);} break;
 case 95:
-# line 597 "lua.stx"
+# line 702 "lua.stx"
 {
+	   code_byte(PUSHSTRING);
+	   code_word(luaI_findconstant(yypvt[-0].pNode));
 	   yyval.vLong = 0;		/* indexed variable */
 	  } break;
 case 96:
-# line 600 "lua.stx"
-{lua_pushvar (yypvt[-0].vLong);} break;
-case 97:
-# line 601 "lua.stx"
+# line 710 "lua.stx"
 {
-	   code_byte(PUSHSTRING);
-	   code_word(lua_findconstant(yypvt[-0].pChar)); incr_ntemp();
-	   yyval.vLong = 0;		/* indexed variable */
+	   Word s = luaI_findsymbol(yypvt[-0].pNode);
+	   int local = lua_localname (s);
+	   if (local == -1)	/* global var */
+	    yyval.vLong = s + 1;		/* return positive value */
+           else
+	    yyval.vLong = -(local+1);		/* return negative value */
 	  } break;
+case 97:
+# line 720 "lua.stx"
+{ lua_pushvar(yypvt[-0].vLong); } break;
 case 98:
-# line 608 "lua.stx"
-{localvar[nlocalvar]=lua_findsymbol(yypvt[-0].pChar); yyval.vInt = 1;} break;
+# line 723 "lua.stx"
+{localvar[nlocalvar]=luaI_findsymbol(yypvt[-0].pNode); yyval.vInt = 1;} break;
 case 99:
-# line 610 "lua.stx"
+# line 725 "lua.stx"
 {
-	     localvar[nlocalvar+yypvt[-2].vInt]=lua_findsymbol(yypvt[-0].pChar); 
+	     localvar[nlocalvar+yypvt[-2].vInt]=luaI_findsymbol(yypvt[-0].pNode); 
 	     yyval.vInt = yypvt[-2].vInt+1;
 	    } break;
+case 100:
+# line 731 "lua.stx"
+{ yyval.vInt = 0; } break;
+case 101:
+# line 732 "lua.stx"
+{ yyval.vInt = yypvt[-0].vInt; } break;
 case 102:
-# line 620 "lua.stx"
+# line 735 "lua.stx"
 {lua_debug = yypvt[-0].vInt;} break;
 	}
 	goto yystack;		/* reset registers in driver code */
diff --git a/src/y.tab.h b/src/parser.h
index 5bee29f9..4c125dad 100644
--- a/src/y.tab.h
+++ b/src/parser.h
@@ -2,11 +2,12 @@
 typedef union  
 {
  int   vInt;
- long  vLong;
  float vFloat;
  char *pChar;
  Word  vWord;
+ Long  vLong;
  Byte *pByte;
+ TreeNode *pNode;
 } YYSTYPE;
 extern YYSTYPE yylval;
 # define WRONGTOKEN 257
@@ -22,16 +23,17 @@ extern YYSTYPE yylval;
 # define END 267
 # define RETURN 268
 # define LOCAL 269
-# define NUMBER 270
-# define FUNCTION 271
+# define FUNCTION 270
+# define NUMBER 271
 # define STRING 272
 # define NAME 273
 # define DEBUG 274
 # define AND 275
 # define OR 276
-# define NE 277
-# define LE 278
-# define GE 279
-# define CONC 280
-# define UNARY 281
-# define NOT 282
+# define EQ 277
+# define NE 278
+# define LE 279
+# define GE 280
+# define CONC 281
+# define UNARY 282
+# define NOT 283
diff --git a/src/table.c b/src/table.c
index 7b93df76..cedbf31c 100644
--- a/src/table.c
+++ b/src/table.c
@@ -3,159 +3,144 @@
 ** Module to control static tables
 */
 
-char *rcs_table="$Id: table.c,v 2.1 1994/04/20 22:07:57 celes Exp $";
+char *rcs_table="$Id: table.c,v 2.28 1995/01/18 20:15:54 celes Exp $";
 
-#include <stdlib.h>
 #include <string.h>
 
-#include "mm.h"
-
+#include "mem.h"
 #include "opcode.h"
+#include "tree.h"
 #include "hash.h"
 #include "inout.h"
 #include "table.h"
 #include "lua.h"
+#include "fallback.h"
+
+
+#define BUFFER_BLOCK 256
+
+Symbol *lua_table;
+static Word lua_ntable = 0;
+static Long lua_maxsymbol = 0;
+
+TaggedString **lua_constant;
+static Word lua_nconstant = 0;
+static Long lua_maxconstant = 0;
+
 
-#define streq(s1,s2)	(s1[0]==s2[0]&&strcmp(s1+1,s2+1)==0)
-
-#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}}},
-                                    {"dofile",{T_CFUNCTION,{lua_internaldofile}}},
-                                    {"dostring",{T_CFUNCTION,{lua_internaldostring}}}
-                                                 };
-Symbol	       	       *lua_table=tablebuffer;
-Word   	 		lua_ntable=7;
-
-struct List
-{
- Symbol *s;
- struct List *next;
-};
-
-static struct List o6={ tablebuffer+6, 0};
-static struct List o5={ tablebuffer+5, &o6 };
-static struct List o4={ tablebuffer+4, &o5 };
-static struct List o3={ tablebuffer+3, &o4 };
-static struct List o2={ tablebuffer+2, &o3 };
-static struct List o1={ tablebuffer+1, &o2 };
-static struct List o0={ tablebuffer+0, &o1 };
-static struct List *searchlist=&o0;
-
-#ifndef MAXCONSTANT
-#define MAXCONSTANT	256
-#endif
-/* pre-defined constants need garbage collection extra byte */ 
-static char tm[] = " mark";
-static char ti[] = " nil";
-static char tn[] = " number";
-static char ts[] = " string";
-static char tt[] = " table";
-static char tf[] = " function";
-static char tc[] = " cfunction";
-static char tu[] = " userdata";
-static char  	       *constantbuffer[MAXCONSTANT] = {tm+1, ti+1,
-						       tn+1, ts+1,
-						       tt+1, tf+1,
-						       tc+1, tu+1
-                                                      };
-char  	      	      **lua_constant = constantbuffer;
-Word    		lua_nconstant=T_USERDATA+1;
-
-#ifndef MAXSTRING
-#define MAXSTRING	512
-#endif
-static char 	       *stringbuffer[MAXSTRING];
-char  		      **lua_string = stringbuffer;
-Word    		lua_nstring=0;
 
 #define MAXFILE 	20
 char  		       *lua_file[MAXFILE];
 int      		lua_nfile;
 
+#define GARBAGE_BLOCK 256
+#define MIN_GARBAGE_BLOCK 10
 
-#define markstring(s)   (*((s)-1))
+static void lua_nextvar (void);
+static void setglobal (void);
+static void getglobal (void);
+
+/*
+** Initialise symbol table with internal functions
+*/
+static void lua_initsymbol (void)
+{
+ Word n;
+ lua_maxsymbol = BUFFER_BLOCK;
+ lua_table = newvector(lua_maxsymbol, Symbol);
+ n = luaI_findsymbolbyname("next");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_next;
+ n = luaI_findsymbolbyname("dofile");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_internaldofile;
+ n = luaI_findsymbolbyname("setglobal");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = setglobal;
+ n = luaI_findsymbolbyname("getglobal");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = getglobal;
+ n = luaI_findsymbolbyname("nextvar");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_nextvar;
+ n = luaI_findsymbolbyname("type"); 
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_type;
+ n = luaI_findsymbolbyname("tonumber");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_obj2number;
+ n = luaI_findsymbolbyname("print");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_print;
+ n = luaI_findsymbolbyname("dostring");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = lua_internaldostring;
+ n = luaI_findsymbolbyname("setfallback");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_setfallback;
+ n = luaI_findsymbolbyname("error");
+ s_tag(n) = LUA_T_CFUNCTION; s_fvalue(n) = luaI_error;
+}
 
 
-/* Variables to controll garbage collection */
-Word lua_block=10; /* to check when garbage collector will be called */
-Word lua_nentity;   /* counter of new entities (strings and arrays) */
+/*
+** Initialise constant table with pre-defined constants
+*/
+void lua_initconstant (void)
+{
+ lua_maxconstant = BUFFER_BLOCK;
+ lua_constant = newvector(lua_maxconstant, TaggedString *);
+}
 
 
 /*
 ** Given a name, search it at symbol table and return its index. If not
-** found, allocate at end of table, checking oveflow and return its index.
-** On error, return -1.
+** found, allocate it.
 */
-int lua_findsymbol (char *s)
+Word luaI_findsymbol (TreeNode *t)
 {
- struct List *l, *p;
- for (p=NULL, l=searchlist; l!=NULL; p=l, l=l->next)
-  if (streq(s,l->s->name))
+ if (lua_table == NULL)
+  lua_initsymbol(); 
+ if (t->varindex == NOT_USED)
+ {
+  if (lua_ntable == lua_maxsymbol)
   {
-   if (p!=NULL)
-   {
-    p->next = l->next;
-    l->next = searchlist;
-    searchlist = l;
-   }
-   return (l->s-lua_table);
+   if (lua_maxsymbol >= MAX_WORD)
+     lua_error("symbol table overflow");
+   lua_maxsymbol *= 2;
+   if (lua_maxsymbol >= MAX_WORD)
+     lua_maxsymbol = MAX_WORD; 
+   lua_table = growvector(lua_table, lua_maxsymbol, Symbol);
   }
-
- if (lua_ntable >= MAXSYMBOL-1)
- {
-  lua_error ("symbol table overflow");
-  return -1;
+  t->varindex = lua_ntable;
+  s_tag(lua_ntable) = LUA_T_NIL;
+  lua_ntable++;
  }
- s_name(lua_ntable) = strdup(s);
- if (s_name(lua_ntable) == NULL)
- {
-  lua_error ("not enough memory");
-  return -1;
- }
- s_tag(lua_ntable) = T_NIL;
- p = malloc(sizeof(*p)); 
- p->s = lua_table+lua_ntable;
- p->next = searchlist;
- searchlist = p;
+ return t->varindex;
+}
 
- return lua_ntable++;
+
+Word luaI_findsymbolbyname (char *name)
+{
+  return luaI_findsymbol(lua_constcreate(name));
 }
 
+
 /*
-** 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.
-** 
+** Given a name, search it at constant table and return its index. If not
+** found, allocate it.
+** On error, return -1.
 */
-int lua_findconstant (char *s)
+Word luaI_findconstant (TreeNode *t)
 {
- int i;
- for (i=0; i<lua_nconstant; i++)
-  if (streq(s,lua_constant[i]))
-   return i;
- if (lua_nconstant >= MAXCONSTANT-1)
+ if (lua_constant == NULL)
+  lua_initconstant();
+ if (t->constindex == NOT_USED)
  {
-  lua_error ("lua: constant string table overflow"); 
-  return -1;
- }
- {
-  char *c = calloc(strlen(s)+2,sizeof(char));
-  c++;		/* create mark space */
-  lua_constant[lua_nconstant++] = strcpy(c,s);
+  if (lua_nconstant == lua_maxconstant)
+  {
+   if (lua_maxconstant >= MAX_WORD)
+     lua_error("constant table overflow");
+   lua_maxconstant *= 2;
+   if (lua_maxconstant >= MAX_WORD)
+     lua_maxconstant = MAX_WORD;
+   lua_constant = growvector(lua_constant, lua_maxconstant, TaggedString *);
+  }
+  t->constindex = lua_nconstant;
+  lua_constant[lua_nconstant] = &(t->ts);
+  lua_nconstant++;
  }
- return (lua_nconstant-1);
+ return t->constindex;
 }
 
 
@@ -164,7 +149,7 @@ int lua_findconstant (char *s)
 */
 void lua_travsymbol (void (*fn)(Object *))
 {
- int i;
+ Word i;
  for (i=0; i<lua_ntable; i++)
   fn(&s_object(i));
 }
@@ -175,9 +160,9 @@ void lua_travsymbol (void (*fn)(Object *))
 */
 void lua_markobject (Object *o)
 {
- if (tag(o) == T_STRING)
-  markstring (svalue(o)) = 1;
- else if (tag(o) == T_ARRAY)
+ if (tag(o) == LUA_T_STRING && !tsvalue(o)->marked)
+   tsvalue(o)->marked = 1;
+ else if (tag(o) == LUA_T_ARRAY)
    lua_hashmark (avalue(o));
 }
 
@@ -188,87 +173,33 @@ void lua_markobject (Object *o)
 */
 void lua_pack (void)
 {
- /* mark stack strings */
- lua_travstack(lua_markobject);
- 
- /* mark symbol table strings */
- lua_travsymbol(lua_markobject);
-
- lua_stringcollector();
- lua_hashcollector();
-
- lua_nentity = 0;      /* reset counter */
+  static Long block = GARBAGE_BLOCK; /* when garbage collector will be called */
+  static Long nentity = 0;  /* counter of new entities (strings and arrays) */
+  Long recovered = 0;
+  if (nentity++ < block) return;
+  lua_travstack(lua_markobject); /* mark stack objects */
+  lua_travsymbol(lua_markobject); /* mark symbol table objects */
+  luaI_travlock(lua_markobject); /* mark locked objects */
+  recovered += lua_strcollector();
+  recovered += lua_hashcollector();
+  nentity = 0;				/* reset counter */
+  block=(16*block-7*recovered)/12;	/* adapt block size */
+  if (block < MIN_GARBAGE_BLOCK) block = MIN_GARBAGE_BLOCK;
 } 
 
-/*
-** Garbage collection to atrings.
-** Delete all unmarked strings
-*/
-void lua_stringcollector (void)
-{
- int i, j;
- for (i=j=0; i<lua_nstring; i++)
-  if (markstring(lua_string[i]) == 1)
-  {
-   lua_string[j++] = lua_string[i];
-   markstring(lua_string[i]) = 0;
-  }
-  else
-  {
-   free (lua_string[i]-1);
-  }
- lua_nstring = j;
-}
-
-/*
-** 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)
-{
- int i;
- if (s == NULL) return NULL;
- 
- for (i=0; i<lua_nstring; i++)
-  if (streq(s,lua_string[i]))
-  {
-   free(s-1);
-   return lua_string[i];
-  }
-
- if (lua_nentity == lua_block || lua_nstring >= MAXSTRING-1)
- {
-  lua_pack ();
-  if (lua_nstring >= MAXSTRING-1)
-  {
-   lua_error ("string table overflow");
-   return NULL;
-  }
- } 
- lua_string[lua_nstring++] = s;
- lua_nentity++;
- return s;
-}
 
 /*
 ** Add a file name at file table, checking overflow. This function also set
 ** the external variable "lua_filename" with the function filename set.
-** Return 0 on success or 1 on error.
+** Return 0 on success or error message on error.
 */
-int lua_addfile (char *fn)
+char *lua_addfile (char *fn)
 {
- if (lua_nfile >= MAXFILE-1)
- {
-  lua_error ("too many files");
-  return 1;
- }
- if ((lua_file[lua_nfile++] = strdup (fn)) == NULL)
- {
-  lua_error ("not enough memory");
-  return 1;
- }
- return 0;
+ if (lua_nfile >= MAXFILE)
+   return "too many files";
+ if ((lua_file[lua_nfile++] = luaI_strdup (fn)) == NULL)
+   return "not enough memory";
+ return NULL;
 }
 
 /*
@@ -276,7 +207,7 @@ int lua_addfile (char *fn)
 */
 int lua_delfile (void)
 {
- lua_nfile--; 
+ luaI_free(lua_file[--lua_nfile]); 
  return 1;
 }
 
@@ -291,47 +222,56 @@ char *lua_filename (void)
 /*
 ** Internal function: return next global variable
 */
-void lua_nextvar (void)
+static void lua_nextvar (void)
 {
- int index;
- Object *o = lua_getparam (1);
- if (o == NULL)
- { lua_error ("too few arguments to function `nextvar'"); return; }
- if (lua_getparam (2) != NULL)
- { lua_error ("too many arguments to function `nextvar'"); return; }
- if (tag(o) == T_NIL)
+ char *varname;
+ TreeNode *next;
+ lua_Object o = lua_getparam(1);
+ if (o == LUA_NOOBJECT)
+   lua_reportbug("too few arguments to function `nextvar'");
+ if (lua_getparam(2) != LUA_NOOBJECT)
+   lua_reportbug("too many arguments to function `nextvar'");
+ if (lua_isnil(o))
+   varname = NULL;
+ else if (!lua_isstring(o))
  {
-  index = 0;
- }
- else if (tag(o) != T_STRING) 
- { 
-  lua_error ("incorrect argument to function `nextvar'"); 
-  return;
+   lua_reportbug("incorrect argument to function `nextvar'"); 
+   return;  /* to avoid warnings */
  }
  else
+   varname = lua_getstring(o);
+ next = lua_varnext(varname);
+ if (next == NULL)
  {
-  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 && tag(&s_object(index)) == T_NIL) index++;
-  
-  if (index == lua_ntable)
-  {
-   lua_pushnil();
-   lua_pushnil();
-   return;
-  }
+  lua_pushnil();
+  lua_pushnil();
  }
+ else
  {
   Object name;
-  tag(&name) = T_STRING;
-  svalue(&name) = lua_createstring(lua_strdup(s_name(index)));
-  if (lua_pushobject (&name)) return;
-  if (lua_pushobject (&s_object(index))) return;
+  tag(&name) = LUA_T_STRING;
+  tsvalue(&name) = &(next->ts);
+  luaI_pushobject(&name);
+  luaI_pushobject(&s_object(next->varindex));
  }
 }
+
+
+static void setglobal (void)
+{
+  lua_Object name = lua_getparam(1);
+  lua_Object value = lua_getparam(2);
+  if (!lua_isstring(name))
+    lua_reportbug("incorrect argument to function `setglobal'");
+  lua_pushobject(value);
+  lua_storeglobal(lua_getstring(name));
+}
+
+
+static void getglobal (void)
+{
+  lua_Object name = lua_getparam(1);
+  if (!lua_isstring(name))
+    lua_reportbug("incorrect argument to function `getglobal'");
+  lua_pushobject(lua_getglobal(lua_getstring(name)));
+}
diff --git a/src/table.h b/src/table.h
index a1da6639..c25075c0 100644
--- a/src/table.h
+++ b/src/table.h
@@ -1,42 +1,31 @@
 /*
 ** Module to control static tables
 ** TeCGraf - PUC-Rio
-** $Id: table.h,v 2.1 1994/04/20 22:07:57 celes Exp $
+** $Id: table.h,v 2.10 1994/12/20 21:20:36 roberto Exp $
 */
 
 #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;
+#include "tree.h"
+#include "opcode.h"
 
-extern Hash  **lua_array;
-extern Word    lua_narray;
+extern Symbol *lua_table;
+extern TaggedString **lua_constant;
 
 extern char   *lua_file[];
 extern int     lua_nfile;
 
-extern Word    lua_block;
-extern Word    lua_nentity;
-
-
 
-int   lua_findsymbol      (char *s);
-int   lua_findconstant    (char *s);
+void  lua_initconstant (void);
+Word  luaI_findsymbolbyname (char *name);
+Word  luaI_findsymbol      (TreeNode *t);
+Word  luaI_findconstant    (TreeNode *t);
 void  lua_travsymbol      (void (*fn)(Object *));
 void  lua_markobject      (Object *o);
 void  lua_pack            (void);
-void  lua_stringcollector (void);
-char *lua_createstring    (char *s);
-int   lua_addfile         (char *fn);
+char *lua_addfile         (char *fn);
 int   lua_delfile 	  (void);
 char *lua_filename        (void);
-void  lua_nextvar         (void);
 
 #endif
diff --git a/src/tree.c b/src/tree.c
new file mode 100644
index 00000000..5dd9d78e
--- /dev/null
+++ b/src/tree.c
@@ -0,0 +1,141 @@
+/*
+** tree.c
+** TecCGraf - PUC-Rio
+*/
+ 
+char *rcs_tree="$Id: tree.c,v 1.13 1995/01/12 14:19:04 roberto Exp $";
+
+
+#include <string.h>
+
+#include "mem.h"
+#include "lua.h"
+#include "tree.h"
+#include "table.h"
+
+
+#define lua_strcmp(a,b)	(a[0]<b[0]?(-1):(a[0]>b[0]?(1):strcmp(a,b))) 
+
+
+typedef struct StringNode {
+  struct StringNode *next;
+  TaggedString ts;
+} StringNode;
+
+static StringNode *string_root = NULL;
+
+static TreeNode *constant_root = NULL;
+
+/*
+** Insert a new constant/variable at the tree. 
+*/
+static TreeNode *tree_create (TreeNode **node, char *str)
+{
+ if (*node == NULL)
+ {
+  *node = (TreeNode *) luaI_malloc(sizeof(TreeNode)+strlen(str));
+  (*node)->left = (*node)->right = NULL;
+  strcpy((*node)->ts.str, str);
+  (*node)->ts.marked = 0;
+  (*node)->ts.hash = 0;
+  (*node)->varindex = (*node)->constindex = NOT_USED;
+  return *node;
+ }
+ else
+ {
+  int c = lua_strcmp(str, (*node)->ts.str);
+  if (c < 0) 
+   return tree_create(&(*node)->left, str);
+  else if (c > 0)
+   return tree_create(&(*node)->right, str);
+  else
+   return *node;
+ }
+}
+
+TaggedString *lua_createstring (char *str) 
+{
+  StringNode *newString;
+  if (str == NULL) return NULL;
+  lua_pack();
+  newString = (StringNode *)luaI_malloc(sizeof(StringNode)+strlen(str));
+  newString->ts.marked = 0;
+  newString->ts.hash = 0;
+  strcpy(newString->ts.str, str);
+  newString->next = string_root;
+  string_root = newString;
+  return &(newString->ts);
+}
+
+
+TreeNode *lua_constcreate (char *str) 
+{
+ return tree_create(&constant_root, str);
+}
+
+
+/*
+** Garbage collection function.
+** This function traverse the string list freeing unindexed strings
+*/
+Long lua_strcollector (void)
+{
+  StringNode *curr = string_root, *prev = NULL;
+  Long counter = 0;
+  while (curr)
+  {
+    StringNode *next = curr->next;
+    if (!curr->ts.marked)
+    {
+      if (prev == NULL) string_root = next;
+      else prev->next = next;
+      luaI_free(curr);
+      ++counter;
+    }
+    else
+    {
+      curr->ts.marked = 0;
+      prev = curr;
+    }
+    curr = next;
+  }
+  return counter;
+}
+
+/*
+** Return next variable.
+*/
+static TreeNode *tree_next (TreeNode *node, char *str)
+{
+ if (node == NULL) return NULL;
+ else if (str == NULL) return node;
+ else
+ {
+  int c = lua_strcmp(str, node->ts.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);
+ }
+}
+
+TreeNode *lua_varnext (char *n)
+{
+  TreeNode *result;
+  char *name = n;
+  while (1)
+  { /* repeat until a valid (non nil) variable */
+    result = tree_next(constant_root, name);
+    if (result == NULL) return NULL;
+    if (result->varindex != NOT_USED &&
+        s_tag(result->varindex) != LUA_T_NIL)
+      return result;
+    name = result->ts.str;
+  }
+}
+
diff --git a/src/tree.h b/src/tree.h
new file mode 100644
index 00000000..849cd5a9
--- /dev/null
+++ b/src/tree.h
@@ -0,0 +1,37 @@
+/*
+** tree.h
+** TecCGraf - PUC-Rio
+** $Id: tree.h,v 1.9 1995/01/12 14:19:04 roberto Exp $
+*/
+
+#ifndef tree_h
+#define tree_h
+
+#include "types.h"
+
+#define NOT_USED  0xFFFE
+
+
+typedef struct TaggedString
+{
+  unsigned long hash;  /* 0 if not initialized */
+  char marked;   /* for garbage collection */
+  char str[1];   /* \0 byte already reserved */
+} TaggedString;
+ 
+typedef struct TreeNode
+{
+ struct TreeNode *right;
+ struct TreeNode *left;
+ unsigned short varindex;  /* != NOT_USED  if this is a symbol */
+ unsigned short constindex;  /* != NOT_USED  if this is a constant */
+ TaggedString ts;
+} TreeNode;
+
+
+TaggedString *lua_createstring (char *str);
+TreeNode *lua_constcreate  (char *str);
+Long lua_strcollector (void);
+TreeNode *lua_varnext      (char *n);
+
+#endif
diff --git a/src/types.h b/src/types.h
new file mode 100644
index 00000000..43684228
--- /dev/null
+++ b/src/types.h
@@ -0,0 +1,31 @@
+/*
+** TeCGraf - PUC-Rio
+** $Id: types.h,v 1.3 1995/02/06 19:32:43 roberto Exp $
+*/
+
+#ifndef types_h
+#define types_h
+
+#include <limits.h>
+
+#ifndef real
+#define real float
+#endif
+
+typedef int Bool;  /* boolean values */
+
+#define Byte lua_Byte	/* some systems have Byte as a predefined type */
+typedef unsigned char  Byte;  /* unsigned 8 bits */
+
+#define Word lua_Word	/* some systems have Word as a predefined type */
+typedef unsigned short Word;  /* unsigned 16 bits */
+
+#define MAX_WORD  (USHRT_MAX-2)  /* maximum value of a word (-2 for safety) */
+#define MAX_INT   (INT_MAX-2)  /* maximum value of a int (-2 for safety) */
+
+#define Long lua_Long	/* some systems have Long as a predefined type */
+typedef signed long  Long;  /* 32 bits */
+
+typedef unsigned int IntPoint; /* unsigned with same size as a pointer (for hashing) */
+
+#endif
diff --git a/src/ugly.h b/src/ugly.h
new file mode 100644
index 00000000..c7512255
--- /dev/null
+++ b/src/ugly.h
@@ -0,0 +1,36 @@
+/*
+** ugly.h
+** TecCGraf - PUC-Rio
+** $Id: ugly.h,v 1.2 1994/11/13 14:39:04 roberto Stab $
+*/
+
+#ifndef ugly_h
+#define ugly_h
+
+/* This enum must have the same order of the array 'reserved' in lex.c */
+
+enum {
+ U_and=128,
+ U_do,
+ U_else,
+ U_elseif,
+ U_end,
+ U_function,
+ U_if,
+ U_local,
+ U_nil,
+ U_not,
+ U_or,
+ U_repeat,
+ U_return,
+ U_then,
+ U_until,
+ U_while,
+ U_eq = '='+128,
+ U_le = '<'+128,
+ U_ge = '>'+128,
+ U_ne = '~'+128,
+ U_sc = '.'+128
+};
+
+#endif
diff --git a/src/yacc/Makefile b/src/yacc/Makefile
index 1d887e10..284d4ab5 100644
--- a/src/yacc/Makefile
+++ b/src/yacc/Makefile
@@ -1,27 +1,3 @@
-# makefile for lua
-
-LIB= $(LUA)/lib
-INC= $(LUA)/inc
-
-CC= gcc
-CFLAGS= -g -Wall -O2 -I$(INC) $(DEFS)
-DEFS= -DMAXCODE=64000 -DMAXCONSTANT=1024 -DMAXSYMBOL=1024 -DMAXARRAY=1024
-
-OBJS= hash.o inout.o lex.o opcode.o table.o y.tab.o
-SLIB= $(LIB)/lua.a
-DLIB= $(LIB)/liblua.so.1.1
-
-libs: $(SLIB) $(DLIB)
-
-$(SLIB): y.tab.c $(OBJS)
-	ar ruvl $@ $(OBJS)
-	ranlib $(SLIB)
-
-$(DLIB): $(OBJS)
-	ld -o $@ $(OBJS)
-
-y.tab.c: lua.stx exscript
-	yacc -d lua.stx ; ex y.tab.c <exscript
-
-clean:
-	rm -f $(OBJS) $(SLIB) $(DLIB)
+parser.c:
+	co -M lua.stx
+	yacc -d lua.stx ; mv -f y.tab.c ../parser.c ; mv -f y.tab.h ../parser.h
diff --git a/src/yacc/exscript b/src/yacc/exscript
deleted file mode 100644
index 0a0f2a9f..00000000
--- a/src/yacc/exscript
+++ /dev/null
@@ -1,3 +0,0 @@
-1d
-x
-
diff --git a/src/yacc/lua.lex b/src/yacc/lua.lex
deleted file mode 100644
index cbb0232a..00000000
--- a/src/yacc/lua.lex
+++ /dev/null
@@ -1,85 +0,0 @@
-%{
-
-char *rcs_lualex = "$Id: lua.lex,v 1.1 1993/12/17 18:53:41 celes Exp $";
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "opcode.h"
-#include "hash.h"
-#include "inout.h"
-#include "table.h"
-#include "y.tab.h"
-
-#undef input
-#undef unput
-
-static Input input;
-static Unput unput;
-
-void lua_setinput (Input fn)
-{
- input = fn;
-}
-
-void lua_setunput (Unput fn)
-{
- unput = fn;
-}
-
-char *lua_lasttext (void)
-{
- return yytext;
-}
-
-%}
-
-
-%%
-[ \t]*					;
-^"$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;
-
diff --git a/src/yacc/lua.stx b/src/yacc/lua.stx
index 118a240c..9c818708 100644
--- a/src/yacc/lua.stx
+++ b/src/yacc/lua.stx
@@ -1,35 +1,43 @@
 %{
 
-char *rcs_luastx = "$Id: lua.stx,v 2.4 1994/04/20 16:22:21 celes Exp $";
+char *rcs_luastx = "$Id: lua.stx,v 3.17 1995/01/13 22:11:12 roberto Exp $";
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "mm.h"
-
+#include "mem.h"
 #include "opcode.h"
 #include "hash.h"
 #include "inout.h"
+#include "tree.h"
 #include "table.h"
 #include "lua.h"
 
+/* to avoid warnings generated by yacc */
+int yyparse (void);
+#define malloc luaI_malloc
+#define realloc luaI_realloc
+#define free luaI_free
+
+#ifndef LISTING
 #define LISTING 0
+#endif
 
-#ifndef GAPCODE
-#define GAPCODE 50
+#ifndef CODE_BLOCK
+#define CODE_BLOCK 256
 #endif
-static Word   maxcode;
-static Word   maxmain;
-static Word   maxcurr ;
-static Byte  *code = NULL;
-static Byte  *initcode;
+static int   maxcode;
+static int   maxmain;
+static Long   maxcurr;  /* to allow maxcurr *= 2 without overflow */
+static Byte  *funcCode = NULL;
+static Byte **initcode;
 static Byte  *basepc;
-static Word   maincode;
-static Word   pc;
+static int   maincode;
+static int   pc;
 
 #define MAXVAR 32
-static long    varbuffer[MAXVAR];    /* variables in an assignment list;
+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 */
 
@@ -39,8 +47,7 @@ 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 */
 
@@ -48,13 +55,12 @@ static void code_byte (Byte c)
 {
  if (pc>maxcurr-2)  /* 1 byte free to code HALT of main code */
  {
-  maxcurr += GAPCODE;
-  basepc = (Byte *)realloc(basepc, maxcurr*sizeof(Byte));
-  if (basepc == NULL)
-  {
-   lua_error ("not enough memory");
-   err = 1;
-  }
+  if (maxcurr >= MAX_INT)
+    lua_error("code size overflow");
+  maxcurr *= 2;
+  if (maxcurr >= MAX_INT)
+    maxcurr = MAX_INT;
+  basepc = growvector(basepc, maxcurr, Byte);
  }
  basepc[pc++] = c;
 }
@@ -77,6 +83,16 @@ static void code_float (float n)
  code_byte(code.m.c4);
 }
 
+static void code_code (Byte *b)
+{
+ CodeCode code;
+ code.b = b;
+ 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;
@@ -90,10 +106,7 @@ 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)
@@ -104,7 +117,6 @@ static void flush_record (int n)
   code_byte(n);
   for (i=0; i<n; i++)
     code_word(fields[--nfields]);
-  ntemp -= n;
 }
 
 static void flush_list (int m, int n)
@@ -113,34 +125,22 @@ static void flush_list (int m, int n)
   if (m == 0)
     code_byte(STORELIST0); 
   else
+  if (m < 255)
   {
     code_byte(STORELIST);
     code_byte(m);
   }
+  else
+   lua_error ("list constructor too long");
   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)
+ if (MAX_TEMPS+nlocalvar+MAXVAR+n < STACKGAP)
   nlocalvar += n;
  else
- {
-  lua_error ("too many local variables or expression too complicate");
-  err = 1;
- }
+  lua_error ("too many local variables");
 }
 
 static void incr_nvarbuffer (void)
@@ -148,14 +148,12 @@ 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;
+{ 
+  Word i = (Word)f;
   if (f == (float)i)  /* f has an (short) integer value */
   {
    if (i <= 2) code_byte(PUSH0 + i);
@@ -175,20 +173,204 @@ static void code_number (float f)
    code_byte(PUSHFLOAT);
    code_float(f);
   }
-  incr_ntemp();
 }
 
+/*
+** 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);
+ }
+ else if (number < 0)	/* local var */
+ {
+  number = (-number) - 1;
+  if (number < 10) code_byte(PUSHLOCAL0 + number);
+  else
+  {
+   code_byte(PUSHLOCAL);
+   code_byte(number);
+  }
+ }
+ else
+ {
+  code_byte(PUSHINDEXED);
+ }
+}
+
+static void lua_codeadjust (int n)
+{
+ if (n+nlocalvar == 0)
+   code_byte(ADJUST0);
+ else
+ {
+   code_byte(ADJUST);
+   code_byte(n+nlocalvar);
+ }
+}
+
+static void init_function (TreeNode *func)
+{
+ if (funcCode == NULL)	/* first function */
+ {
+  funcCode = newvector(CODE_BLOCK, Byte);
+  maxcode = CODE_BLOCK;
+ }
+ pc=0; basepc=funcCode; maxcurr=maxcode; 
+ nlocalvar=0;
+  if (lua_debug)
+  {
+    code_byte(SETFUNCTION); 
+    code_code((Byte *)luaI_strdup(lua_file[lua_nfile-1]));
+    code_word(luaI_findconstant(func));
+  }
+}
+
+static void codereturn (void)
+{
+  if (lua_debug) code_byte(RESET); 
+  if (nlocalvar == 0)
+    code_byte(RETCODE0);
+  else
+  {
+    code_byte(RETCODE);
+    code_byte(nlocalvar);
+  }
+}
+
+static void codedebugline (void)
+{
+  if (lua_debug)
+  {
+    code_byte(SETLINE);
+    code_word(lua_linenumber);
+  }
+}
+
+static void adjust_mult_assign (int vars, int exps, int temps)
+{
+  if (exps < 0) 
+  {
+    int r = vars - (-exps-1);
+    if (r >= 0)
+      code_byte(r);
+    else
+    {
+      code_byte(0);
+      lua_codeadjust(temps);
+    }
+  }
+  else if (vars != exps)
+    lua_codeadjust(temps);
+}
+
+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);
+  }
+ }
+}
+
+static void codeIf (Long thenAdd, Long elseAdd)
+{
+  Long elseinit = elseAdd+sizeof(Word)+1;
+  if (pc == elseinit)		/* no else */
+  {
+    pc -= sizeof(Word)+1;
+    elseinit = pc;
+  }
+  else
+  {
+    basepc[elseAdd] = JMP;
+    code_word_at(basepc+elseAdd+1, pc-elseinit);
+  }
+  basepc[thenAdd] = IFFJMP;
+  code_word_at(basepc+thenAdd+1,elseinit-(thenAdd+sizeof(Word)+1));
+}
+
+static 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);
+}
+
+
+/*
+** Parse LUA code.
+*/
+void lua_parse (Byte **code)
+{
+ initcode = code;
+ *initcode = newvector(CODE_BLOCK, Byte);
+ maincode = 0; 
+ maxmain = CODE_BLOCK;
+ if (yyparse ()) lua_error("parse error");
+ (*initcode)[maincode++] = RETCODE0;
+#if LISTING
+{ static void PrintCode (Byte *c, Byte *end);
+ PrintCode(*initcode,*initcode+maincode); }
+#endif
+}
+
+
 %}
 
 
 %union 
 {
  int   vInt;
- long  vLong;
  float vFloat;
  char *pChar;
  Word  vWord;
+ Long  vLong;
  Byte *pByte;
+ TreeNode *pNode;
 }
 
 %start functionlist
@@ -198,25 +380,27 @@ static void code_number (float f)
 %token IF THEN ELSE ELSEIF WHILE DO REPEAT UNTIL END
 %token RETURN
 %token LOCAL
+%token FUNCTION
 %token <vFloat> NUMBER
-%token <vWord>  FUNCTION STRING
-%token <pChar>   NAME 
+%token <vWord>  STRING
+%token <pNode>  NAME 
 %token <vInt>   DEBUG
 
-%type <vWord> PrepJump
-%type <vInt>  expr, exprlist, exprlist1, varlist1, typeconstructor
-%type <vInt>  fieldlist, localdeclist
-%type <vInt>  ffieldlist, ffieldlist1
-%type <vInt>  lfieldlist, lfieldlist1
-%type <vLong> var, objectname
-
+%type <vLong> PrepJump
+%type <vInt>  expr, exprlist, exprlist1, varlist1, funcParams, funcvalue
+%type <vInt>  fieldlist, localdeclist, decinit
+%type <vInt>  ffieldlist1
+%type <vInt>  lfieldlist1
+%type <vLong> var, singlevar
+%type <pByte> body
 
 %left AND OR
-%left '=' NE '>' '<' LE GE
+%left EQ NE '>' '<' LE GE
 %left CONC
 %left '+' '-'
 %left '*' '/'
 %left UNARY NOT
+%right '^'
 
 
 %% /* beginning of rules section */
@@ -225,156 +409,115 @@ static void code_number (float f)
 functionlist : /* empty */
 	     | functionlist 
 	        {
-	  	  pc=maincode; basepc=initcode; maxcurr=maxmain;
+	  	  pc=maincode; basepc=*initcode; maxcurr=maxmain;
 		  nlocalvar=0;
 	        }
 	       stat sc 
 		{
-		  maincode=pc; initcode=basepc; maxmain=maxcurr;
+		  maincode=pc; *initcode=basepc; maxmain=maxcurr;
 		}
 	     | functionlist function
+	     | functionlist method
 	     | functionlist setdebug
 	     ;
-	     
+
 function     : FUNCTION NAME 
+               {
+		init_function($2);
+	       }
+               body 	 
+	       { 
+		Word func = luaI_findsymbol($2);
+	        s_tag(func) = LUA_T_FUNCTION;
+	        s_bvalue(func) = $4;
+	       }
+	       ;
+
+method         : FUNCTION NAME ':' NAME
 	       {
-		if (code == NULL)	/* first function */
-		{
-		 code = (Byte *) calloc(GAPCODE, sizeof(Byte));
-		 if (code == NULL)
-		 {
-		  lua_error("not enough memory");
-		  err = 1;
-		 }
-		 maxcode = GAPCODE;
-		}
-		pc=0; basepc=code; maxcurr=maxcode; 
-		nlocalvar=0;
-		$<vWord>$ = lua_findsymbol($2); 
+		init_function($4);
+	        localvar[nlocalvar]=luaI_findsymbolbyname("self");
+	        add_nlocalvar(1);
 	       }
-	       '(' parlist ')' 
+	       body
 	       {
-	        if (lua_debug)
-		{
-	         code_byte(SETFUNCTION); 
-                 code_word(lua_nfile-1);
-		 code_word($<vWord>3);
-		}
-	        lua_codeadjust (0);
+	        /* assign function to table field */
+	        pc=maincode; basepc=*initcode; maxcurr=maxmain;
+	        nlocalvar=0;
+		lua_pushvar(luaI_findsymbol($2)+1);
+                code_byte(PUSHSTRING);
+		code_word(luaI_findconstant($4));
+                code_byte(PUSHFUNCTION);
+                code_code($6);
+                code_byte(STOREINDEXED0);
+		maincode=pc; *initcode=basepc; maxmain=maxcurr;
 	       }
-               block
-               END 	 
-	       { 
-                if (lua_debug) code_byte(RESET); 
-	        code_byte(RETCODE); code_byte(nlocalvar);
-	        s_tag($<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;
+	       ;
+
+body :  '(' parlist ')' block END
+	{
+          codereturn();
+	  $$ = newvector(pc, Byte);
+	  memcpy($$, basepc, pc*sizeof(Byte));
+	  funcCode = basepc; maxcode=maxcurr;
 #if LISTING
-PrintCode(code,code+pc);
+                PrintCode(funcCode,funcCode+pc);
 #endif
-	       }
-	       ;
+	}
+		;
 
 statlist : /* empty */
 	 | statlist stat sc
 	 ;
 
-stat	 : {
-            ntemp = 0; 
-            if (lua_debug)
-            {
-             code_byte(SETLINE); code_word(lua_linenumber);
-            }
-	   }
-	   stat1
-		
 sc	 : /* empty */ | ';' ;
 
+stat  : { codedebugline(); } stat1 ;
+
+cond  : { codedebugline(); } expr1 ;
 
 stat1  : IF expr1 THEN PrepJump block PrepJump elsepart END
-       {
-        {
-	 Word 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-($4+sizeof(Word)+1));
-	}
-       }
-     
-       | WHILE {$<vWord>$=pc;} expr1 DO PrepJump block PrepJump END
-     	
+	{ codeIf($4, $6); }
+
+       | WHILE {$<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+$7+1, pc - ($<vWord>2));
+	code_word_at(basepc+$7+1, pc - ($<vLong>2));
        }
      
-       | REPEAT {$<vWord>$=pc;} block UNTIL expr1 PrepJump
-     	
+       | REPEAT {$<vLong>$=pc;} block UNTIL cond PrepJump
        {
         basepc[$6] = IFFUPJMP;
-	code_word_at(basepc+$6+1, pc - ($<vWord>2));
+	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);
+         adjust_mult_assign(nvarbuffer, $3, $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); }
+       | functioncall	{ code_byte(0); }
+       | LOCAL localdeclist decinit
+	{ add_nlocalvar($2);
+	  adjust_mult_assign($2, $3, 0);
+	 }
        ;
 
 elsepart : /* empty */
 	 | ELSE block
-         | ELSEIF expr1 THEN PrepJump block PrepJump elsepart
-         {
-          {
-  	   Word 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));
-	  }  
-         }   
+         | ELSEIF cond THEN PrepJump block PrepJump elsepart
+	{ codeIf($4, $6); }
          ;
      
-block    : {$<vInt>$ = nlocalvar;} statlist {ntemp = 0;} ret 
+block    : {$<vInt>$ = nlocalvar;} statlist ret 
          {
 	  if (nlocalvar != $<vInt>1)
 	  {
@@ -385,11 +528,10 @@ block    : {$<vInt>$ = nlocalvar;} statlist {ntemp = 0;} ret
          ;
 
 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);
+        | RETURN { codedebugline(); } exprlist sc
+          {
+           if ($3 < 0) code_byte(MULT_RET);
+           codereturn();
           }
 	;
 
@@ -400,55 +542,42 @@ PrepJump : /* empty */
 	  code_word (0);
          }
 	   
-expr1	 : expr { if ($1 == 0) {lua_codeadjust (ntemp+1); incr_ntemp();}}
+expr1	 : expr { if ($1 == 0) code_byte(1); }
 	 ;
 				
-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	{ $$ = 1; }
+expr :  '(' expr ')'  { $$ = $2; }
+     |  expr1 EQ  expr1	{ code_byte(EQOP);   $$ = 1; }
+     |	expr1 '<' expr1	{ code_byte(LTOP);   $$ = 1; }
+     |	expr1 '>' expr1	{ code_byte(GTOP);   $$ = 1; }
+     |	expr1 NE  expr1	{ code_byte(EQOP); code_byte(NOTOP); $$ = 1; }
+     |	expr1 LE  expr1	{ code_byte(LEOP);   $$ = 1; }
+     |	expr1 GE  expr1	{ code_byte(GEOP);   $$ = 1; }
+     |	expr1 '+' expr1 { code_byte(ADDOP);  $$ = 1; }
+     |	expr1 '-' expr1 { code_byte(SUBOP);  $$ = 1; }
+     |	expr1 '*' expr1 { code_byte(MULTOP); $$ = 1; }
+     |	expr1 '/' expr1 { code_byte(DIVOP);  $$ = 1; }
+     |	expr1 '^' expr1 { code_byte(POWOP);  $$ = 1; }
+     |	expr1 CONC expr1 { code_byte(CONCOP);  $$ = 1; }
      |	'-' expr1 %prec UNARY	{ code_byte(MINUSOP); $$ = 1;}
-     | typeconstructor { $$ = $1; }
-     |  '@' '(' dimension ')'
-     { 
-      code_byte(CREATEARRAY);
-      $$ = 1;
-     }
-     |	var             { lua_pushvar ($1); $$ = 1;}
-     |	NUMBER          { code_number($1); $$ = 1; }
-     |	STRING
+     | table { $$ = 1; }
+     |  varexp          { $$ = 1;}
+     |  NUMBER          { code_number($1); $$ = 1; }
+     |  STRING
      {
       code_byte(PUSHSTRING);
       code_word($1);
       $$ = 1;
-      incr_ntemp();
-     }
-     |	NIL		{code_byte(PUSHNIL); $$ = 1; incr_ntemp();}
-     |	functioncall
-     {
-      $$ = 0;
-      if (lua_debug)
-      {
-       code_byte(SETLINE); code_word(lua_linenumber);
-      }
      }
+     |	NIL		{code_byte(PUSHNIL); $$ = 1; }
+     |  functioncall    { $$ = 0; }
      |	NOT expr1	{ code_byte(NOTOP);  $$ = 1;}
-     |	expr1 AND PrepJump {code_byte(POP); ntemp--;} expr1
+     |	expr1 AND PrepJump {code_byte(POP); } expr1
      { 
       basepc[$3] = ONFJMP;
       code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
       $$ = 1;
      }
-     |	expr1 OR PrepJump {code_byte(POP); ntemp--;} expr1	
+     |	expr1 OR PrepJump {code_byte(POP); } expr1	
      { 
       basepc[$3] = ONTJMP;
       code_word_at(basepc+$3+1, pc - ($3 + sizeof(Word)+1));
@@ -456,92 +585,77 @@ expr :	'(' expr ')'    { $$ = $2; }
      }
      ;
 
-typeconstructor: '@'  
+table :
      {
-      code_byte(PUSHBYTE);
-      $<vWord>$ = pc; code_byte(0);
-      incr_ntemp();
       code_byte(CREATEARRAY);
+      $<vLong>$ = pc; code_word(0);
      }
-      objectname fieldlist 
+      '{' fieldlist '}'
      {
-      basepc[$<vWord>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);
-       }
-      }
+      code_word_at(basepc+$<vLong>1, $3);
      }
          ;
 
-dimension    : /* empty */	{ code_byte(PUSHNIL); incr_ntemp();}
-	     | expr1
+functioncall : funcvalue funcParams
+	{ code_byte(CALLFUNC); code_byte($1+$2); }
 	     ;
-	     
-functioncall : functionvalue  {code_byte(PUSHMARK); $<vInt>$ = ntemp; incr_ntemp();}
-                '(' exprlist ')' { code_byte(CALLFUNC); ntemp = $<vInt>2-1;}
 
-functionvalue : var {lua_pushvar ($1); } 
-	      ;
-		
-exprlist  :	/* empty */		{ $$ = 1; }
+funcvalue    : varexp { $$ = 0; }
+	     | varexp ':' NAME 
+	     { 
+               code_byte(PUSHSELF); 
+	       code_word(luaI_findconstant($3));
+               $$ = 1;
+	     }
+	     ;
+
+funcParams :	'(' exprlist ')'
+	{ if ($2<0) { code_byte(1); $$ = -$2; } else $$ = $2; }
+	|	table  { $$ = 1; }
+	;
+
+exprlist  :	/* empty */		{ $$ = 0; }
 	  |	exprlist1		{ $$ = $1; }
 	  ;
 		
-exprlist1 :	expr			{ $$ = $1; }
-	  |	exprlist1 ',' {if (!$1){lua_codeadjust (ntemp+1); incr_ntemp();}} 
-                 expr {$$ = $4;}
+exprlist1 :	expr	{ if ($1 == 0) $$ = -1; else $$ = 1; }
+	  |	exprlist1 ',' { if ($1 < 0) code_byte(1); } expr 
+	{
+          int r = $1 < 0 ? -$1 : $1;
+          $$ = ($4 == 0) ? -(r+1) : r+1;
+	}
 	  ;
 
-parlist  :	/* empty */
-	  |	parlist1
+parlist  :	/* empty */ { lua_codeadjust(0); }
+	  |	parlist1    { lua_codeadjust(0); }
 	  ;
 		
 parlist1 :	NAME		  
 		{
-		 localvar[nlocalvar]=lua_findsymbol($1); 
+		 localvar[nlocalvar]=luaI_findsymbol($1); 
 		 add_nlocalvar(1);
 		}
 	  |	parlist1 ',' NAME 
 		{
-		 localvar[nlocalvar]=lua_findsymbol($3); 
+		 localvar[nlocalvar]=luaI_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;
-     	      }
+fieldlist  : /* empty */ { $$ =  0; }
+	   | lfieldlist1 lastcomma
+  	     { $$ = $1; flush_list($1/FIELDS_PER_FLUSH, $1%FIELDS_PER_FLUSH); }
+	   | ffieldlist1 lastcomma
+	     { $$ = $1; flush_record($1%FIELDS_PER_FLUSH); }
+	   | lfieldlist1 ';' 
+	     { flush_list($1/FIELDS_PER_FLUSH, $1%FIELDS_PER_FLUSH); }
+	    ffieldlist1 lastcomma
+	     { $$ = $1+$4; flush_record($4%FIELDS_PER_FLUSH); }
 	   ;
 
-ffieldlist : /* empty */   { $$ = 0; }
-           | ffieldlist1   { $$ = $1; }
-           ;
+lastcomma  : /* empty */ 
+	   | ','
+	   ;
 
 ffieldlist1 : ffield			{$$=1;}
 	   | ffieldlist1 ',' ffield	
@@ -551,16 +665,12 @@ ffieldlist1 : ffield			{$$=1;}
 		}
 	   ; 
 
-ffield      : NAME {$<vWord>$ = lua_findconstant($1);} '=' expr1 
+ffield      : NAME '=' expr1 
 	      { 
-	       push_field($<vWord>2);
+	       push_field(luaI_findconstant($1));
 	      }
            ;
 
-lfieldlist : /* empty */   { $$ = 0; }
-           | lfieldlist1   { $$ = $1; }
-           ;
-
 lfieldlist1 : expr1  {$$=1;}
 	    | lfieldlist1 ',' expr1
 		{
@@ -583,169 +693,49 @@ varlist1  :	var
 	  }
 	  ;
 		
-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 ']' 
+var	  :	singlevar { $$ = $1; }
+	  |	varexp '[' expr1 ']' 
 	  {
 	   $$ = 0;		/* indexed variable */
 	  }
-	  |	var {lua_pushvar ($1);} '.' NAME
+	  |	varexp '.' NAME
 	  {
 	   code_byte(PUSHSTRING);
-	   code_word(lua_findconstant($4)); incr_ntemp();
+	   code_word(luaI_findconstant($3));
 	   $$ = 0;		/* indexed variable */
 	  }
 	  ;
 		
-localdeclist  : NAME {localvar[nlocalvar]=lua_findsymbol($1); $$ = 1;}
+singlevar :	NAME
+	  {
+	   Word s = luaI_findsymbol($1);
+	   int local = lua_localname (s);
+	   if (local == -1)	/* global var */
+	    $$ = s + 1;		/* return positive value */
+           else
+	    $$ = -(local+1);		/* return negative value */
+	  }
+	  ;
+
+varexp	: var { lua_pushvar($1); }
+	;
+	  
+localdeclist  : NAME {localvar[nlocalvar]=luaI_findsymbol($1); $$ = 1;}
      	  | localdeclist ',' NAME 
 	    {
-	     localvar[nlocalvar+$1]=lua_findsymbol($3); 
+	     localvar[nlocalvar+$1]=luaI_findsymbol($3); 
 	     $$ = $1+1;
 	    }
 	  ;
 		
-decinit	  : /* empty */
-	  | '=' exprlist1
+decinit	  : /* empty */  { $$ = 0; }
+	  | '=' exprlist1 { $$ = $2; }
 	  ;
 	  
 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(GAPCODE, sizeof(Byte));
- maincode = 0; 
- maxmain = GAPCODE;
- 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)
@@ -792,6 +782,16 @@ static void PrintCode (Byte *code, Byte *end)
     			 printf ("%d    PUSHSTRING   %d\n", n, c.w);
 			}
    			break;
+   case PUSHFUNCTION:
+			{
+			 CodeCode c;
+			 int n = p-code;
+			 p++;
+			 get_code(c,p);
+			 printf ("%d    PUSHFUNCTION  %p\n", n, c.b);
+			}
+			break;
+
    case PUSHLOCAL0: case PUSHLOCAL1: case PUSHLOCAL2: case PUSHLOCAL3:
    case PUSHLOCAL4: case PUSHLOCAL5: case PUSHLOCAL6: case PUSHLOCAL7:
    case PUSHLOCAL8: case PUSHLOCAL9:
@@ -811,8 +811,6 @@ static void PrintCode (Byte *code, Byte *end)
 			}
    			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:
@@ -832,6 +830,15 @@ static void PrintCode (Byte *code, Byte *end)
     			 printf ("%d    STOREGLOBAL   %d\n", n, c.w);
 			}
    			break;
+   case PUSHSELF:
+    			{
+			 CodeWord c;
+			 int n = p-code;
+			 p++;
+			 get_word(c,p);
+    			 printf ("%d    PUSHSELF   %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++;
@@ -848,11 +855,20 @@ static void PrintCode (Byte *code, Byte *end)
        printf("%d      STORERECORD  %d\n", p-code, *(++p));
        p += *p*sizeof(Word) + 1;
        break;
+   case ADJUST0: printf ("%d    ADJUST0\n", (p++)-code); break;
    case ADJUST:
     			printf ("%d    ADJUST   %d\n", p-code, *(++p));
     			p++;
    			break;
-   case CREATEARRAY:	printf ("%d    CREATEARRAY\n", (p++)-code); break;
+   case CREATEARRAY:	
+    {
+      CodeWord c;
+      int n = p-code;
+      p++;
+      get_word(c,p);
+      printf ("%d    CREATEARRAY %d\n", n, c.w);
+      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;
@@ -860,6 +876,7 @@ static void PrintCode (Byte *code, Byte *end)
    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 POWOP:       	printf ("%d    POWOP\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;
@@ -918,20 +935,24 @@ static void PrintCode (Byte *code, Byte *end)
 			}
    			break;
    case POP:       	printf ("%d    POP\n", (p++)-code); break;
-   case CALLFUNC:	printf ("%d    CALLFUNC\n", (p++)-code); break;
+   case CALLFUNC:
+	printf ("%d    CALLFUNC %d %d\n", p-code, *(p+1), *(p+2));
+	p+=3;
+	break;
+   case RETCODE0: printf ("%d    RETCODE0\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;
+			 CodeCode c1;
+                         CodeWord c2;
                          int n = p-code;
                          p++;
-                         get_word(c1,p);
+                         get_code(c1,p);
                          get_word(c2,p);
-                         printf ("%d    SETFUNCTION  %d  %d\n", n, c1.w, c2.w);
+                         printf ("%d    SETFUNCTION  %s  %d\n", n, (char *)c1.b, c2.w);
                         }
                         break;
    case SETLINE:
diff --git a/test/array.lua b/test/array.lua
index 349fb818..7caca888 100644
--- a/test/array.lua
+++ b/test/array.lua
@@ -1,6 +1,6 @@
 $debug
 
-a = @()
+a = {}
 
 i=0
 while i<10 do
diff --git a/test/dump b/test/dump.lua
index d5feb2b4..fa0aa4fb 100644
--- a/test/dump
+++ b/test/dump.lua
@@ -1,20 +1,20 @@
 
 
 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 == 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.."=@()")
+    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
+        if type(r) == 'string' then
           savevar(n.."."..r,f)
 	else
           savevar(n.."["..r.."]",f)
diff --git a/test/teste.lua b/test/long.lua
index 467ce122..5492fd50 100644
--- a/test/teste.lua
+++ b/test/long.lua
@@ -12,7 +12,7 @@ function sort(a,n)                      -- selection sort
 end
 
 
-v = @(5000)
+v = { }
 
 i=1
 while i <= 5000 do v[i] = 5000-i i=i+1 end
diff --git a/test/save.lua b/test/save.lua
index 3eb91086..8c64c568 100644
--- a/test/save.lua
+++ b/test/save.lua
@@ -1,10 +1,10 @@
 
 
 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 == 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
@@ -14,7 +14,7 @@ function savevar (n,v)
     r,f = next(v,nil);
     while r ~= nil do
       if r ~= "__visited__" then
-        if type(r) = 'string' then
+        if type(r) == 'string' then
           savevar(n.."['"..r.."']",f)
 	else
           savevar(n.."["..r.."]",f)
@@ -36,9 +36,9 @@ local n,v
 end
 
 a = 3
-x = @{a = 4, b = "name", l=@[4,5,67]}
+x = {a = 4, b = "name", l={4,5,67}}
 
-b = @{t=5}
+b = {t=5}
 x.next = b
 
 
diff --git a/test/sort.lua b/test/sort.lua
index 6d0d9a0d..14d4cf22 100644
--- a/test/sort.lua
+++ b/test/sort.lua
@@ -31,7 +31,7 @@ function sort(a,n)			-- selection sort
 end
 
 function main()
- x=@()
+ x={}
  n=-1
  n=n+1;	x[n]="a"
  n=n+1;	x[n]="waldemar"
diff --git a/test/sort/q.lua b/test/sort/q.lua
deleted file mode 100644
index 8d9a20d4..00000000
--- a/test/sort/q.lua
+++ /dev/null
@@ -1,51 +0,0 @@
-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
-	repeat
-		repeat i=i+1 until x[i]>=v
-		repeat j=j-1 until x[j]<=v
-		x[i],x[j]=x[j],x[i]
-	until j<=i			-- separacao
-	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 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"
--- sort(x,n)
- 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])
-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]
- print (i, a[i])
- i=i+1
- end
-end
-
-main()
diff --git a/test/sort/sort.lua b/test/sort/sort.lua
deleted file mode 100644
index ba2e273c..00000000
--- a/test/sort/sort.lua
+++ /dev/null
@@ -1,51 +0,0 @@
-$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]
- print (i, a[i])
- i=i+1
- end
-end
-
-x=@(20)
-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"
--- sort(x,n)
-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])
diff --git a/test/type.lua b/test/type.lua
index 5078920b..3079391d 100644
--- a/test/type.lua
+++ b/test/type.lua
@@ -3,7 +3,7 @@ $debug
 function check (object, class)
  local v = next(object,nil);
  while v ~= nil do
-   if class[v] = nil then
+   if class[v] == nil then
     print("unknown field: " .. v) 
    elseif type(object[v]) ~= class[v].type then
     print("wrong type for field " .. v)
@@ -12,7 +12,7 @@ function check (object, class)
  end
  v = next(class,nil);
  while v ~= nil do
-   if object[v] = nil then
+   if object[v] == nil then
      if class[v].default ~= nil then
       object[v] = class[v].default
      else
@@ -23,9 +23,9 @@ function check (object, class)
  end
 end
 
-typeblock = @{x = @{default = 0, type = "number"},
-               y = @{default = 0, type = "number"},
-               name = @{type = "string"}
+typeblock = {x = {default = 0, type = "number"},
+               y = {default = 0, type = "number"},
+               name = {type = "string"}
               }
 
 function block(t) check(t,typeblock) end