32 files changed, 280 insertions, 293 deletions

diff --git a/lapi.c b/lapi.c
index 01579561..d915696b 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 1.71 2000/02/08 16:34:31 roberto Exp roberto $
+** $Id: lapi.c,v 1.72 2000/02/22 17:54:16 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -41,9 +41,10 @@ const TObject *luaA_protovalue (const TObject *o) {
 }
 
 
-void luaA_checkCparams (lua_State *L, int nParams) {
-  if (nParams > L->top-L->Cstack.base)
-    lua_error(L, "API error - wrong number of arguments in C2lua stack");
+void luaA_checkCargs (lua_State *L, int nargs) {
+  if (nargs > L->top-L->Cstack.base)
+    luaL_verror(L, "Lua API error - "
+                   "expected at least %d arguments in C2lua stack", nargs);
 }
 
 
@@ -70,7 +71,7 @@ static void top2LC (lua_State *L, int n) {
 
 
 lua_Object lua_pop (lua_State *L) {
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   return luaA_putObjectOnTop(L);
 }
 
@@ -103,10 +104,10 @@ lua_Object lua_gettagmethod (lua_State *L, int tag, const char *event) {
 
 lua_Object lua_settagmethod (lua_State *L, int tag, const char *event) {
   TObject *method;
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   method = L->top-1;
   if ((ttype(method) != LUA_T_NIL) && (*lua_type(L, method) != 'f'))
-    lua_error(L, "API error - tag method must be a function or nil");
+    lua_error(L, "Lua API error - tag method must be a function or nil");
   luaT_settagmethod(L, tag, event, method);
   return luaA_putObjectOnTop(L);
 }
@@ -114,7 +115,7 @@ lua_Object lua_settagmethod (lua_State *L, int tag, const char *event) {
 
 lua_Object lua_seterrormethod (lua_State *L) {
   lua_Object temp;
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   temp = lua_getglobal(L, "_ERRORMESSAGE");
   lua_setglobal(L, "_ERRORMESSAGE");
   return temp;
@@ -122,7 +123,7 @@ lua_Object lua_seterrormethod (lua_State *L) {
 
 
 lua_Object lua_gettable (lua_State *L) {
-  luaA_checkCparams(L, 2);
+  luaA_checkCargs(L, 2);
   luaV_gettable(L, L->top--);
   return luaA_putObjectOnTop(L);
 }
@@ -130,7 +131,7 @@ lua_Object lua_gettable (lua_State *L) {
 
 lua_Object lua_rawgettable (lua_State *L) {
   lua_Object res;
-  luaA_checkCparams(L, 2);
+  luaA_checkCargs(L, 2);
   if (ttype(L->top-2) != LUA_T_ARRAY)
     lua_error(L, "indexed expression not a table in rawgettable");
   res = luaA_putluaObject(L, luaH_get(L, avalue(L->top-2), L->top-1));
@@ -141,7 +142,7 @@ lua_Object lua_rawgettable (lua_State *L) {
 
 void lua_settable (lua_State *L) {
   StkId top;
-  luaA_checkCparams(L, 3);
+  luaA_checkCargs(L, 3);
   top = L->top;
   luaV_settable(L, top-3, top);
   L->top = top-3;  /* pop table, index, and value */
@@ -149,7 +150,7 @@ void lua_settable (lua_State *L) {
 
 
 void lua_rawsettable (lua_State *L) {
-  luaA_checkCparams(L, 3);
+  luaA_checkCargs(L, 3);
   luaV_rawsettable(L, L->top-3);
 }
 
@@ -176,14 +177,14 @@ lua_Object lua_rawgetglobal (lua_State *L, const char *name) {
 
 
 void lua_setglobal (lua_State *L, const char *name) {
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   luaV_setglobal(L, luaS_assertglobalbyname(L, name), L->top--);
 }
 
 
 void lua_rawsetglobal (lua_State *L, const char *name) {
   GlobalVar *gv = luaS_assertglobalbyname(L, name);
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   gv->value = *(--L->top);
 }
 
@@ -296,8 +297,8 @@ void lua_pushstring (lua_State *L, const char *s) {
 
 void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
   if (fn == NULL)
-    lua_error(L, "API error - attempt to push a NULL Cfunction");
-  luaA_checkCparams(L, n);
+    lua_error(L, "Lua API error - attempt to push a NULL Cfunction");
+  luaA_checkCargs(L, n);
   ttype(L->top) = LUA_T_CPROTO;
   fvalue(L->top) = fn;
   incr_top;
@@ -321,7 +322,7 @@ void luaA_pushobject (lua_State *L, const TObject *o) {
 
 void lua_pushobject (lua_State *L, lua_Object o) {
   if (o == LUA_NOOBJECT)
-    lua_error(L, "API error - attempt to push a NOOBJECT");
+    lua_error(L, "Lua API error - attempt to push a NOOBJECT");
   *L->top = *o;
   incr_top;
 }
@@ -339,7 +340,7 @@ int lua_tag (lua_State *L, lua_Object o) {
 
 
 void lua_settag (lua_State *L, int tag) {
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   luaT_realtag(L, tag);
   switch (ttype(L->top-1)) {
     case LUA_T_ARRAY:
@@ -406,7 +407,7 @@ int luaA_next (lua_State *L, const Hash *t, int i) {
 
 int lua_next (lua_State *L, lua_Object t, int i) {
   if (ttype(t) != LUA_T_ARRAY)
-    lua_error(L, "API error - object is not a table in `lua_next'"); 
+    lua_error(L, "Lua API error - object is not a table in `lua_next'"); 
   i = luaA_next(L, avalue(t), i);
   top2LC(L, (i==0) ? 0 : 2);
   return i;
diff --git a/lapi.h b/lapi.h
index 469fb272..5fb3e90d 100644
--- a/lapi.h
+++ b/lapi.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h,v 1.12 1999/12/23 18:19:57 roberto Exp roberto $
+** $Id: lapi.h,v 1.13 2000/01/19 12:00:45 roberto Exp roberto $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */
@@ -11,7 +11,7 @@
 #include "lobject.h"
 
 
-void luaA_checkCparams (lua_State *L, int nParams);
+void luaA_checkCargs (lua_State *L, int nargs);
 const TObject *luaA_protovalue (const TObject *o);
 void luaA_pushobject (lua_State *L, const TObject *o);
 GlobalVar *luaA_nextvar (lua_State *L, TaggedString *g);
diff --git a/lbuffer.c b/lbuffer.c
index 2525ea02..f584936d 100644
--- a/lbuffer.c
+++ b/lbuffer.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbuffer.c,v 1.10 1999/11/10 15:40:46 roberto Exp roberto $
+** $Id: lbuffer.c,v 1.11 1999/11/22 13:12:07 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -19,10 +19,14 @@
 -------------------------------------------------------*/
 
 
+/*
+** amount of extra space (pre)allocated when buffer is reallocated
+*/
 #define EXTRABUFF       32
 
 
-#define openspace(L, size)  if (L->Mbuffnext+(size) > L->Mbuffsize) Openspace(L, size)
+#define openspace(L, size)  if (L->Mbuffnext+(size) > L->Mbuffsize) \
+                              Openspace(L, size)
 
 static void Openspace (lua_State *L, int size) {
   L->Mbuffsize = (L->Mbuffnext+size+EXTRABUFF)*2;
diff --git a/lbuiltin.c b/lbuiltin.c
index 7e0c832c..3a57e814 100644
--- a/lbuiltin.c
+++ b/lbuiltin.c
@@ -1,10 +1,19 @@
 /*
-** $Id: lbuiltin.c,v 1.92 2000/01/19 16:50:30 roberto Exp roberto $
+** $Id: lbuiltin.c,v 1.93 2000/02/22 18:12:46 roberto Exp roberto $
 ** Built-in functions
 ** See Copyright Notice in lua.h
 */
 
 
+/*
+** =========================================================================
+** All built-in functions are public (i.e. not static) and are named luaB_f,
+** where f is the function name in Lua. So, if you do not need all these
+** functions, you may register manually only the ones that you need.
+** =========================================================================
+*/
+
+
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -91,7 +100,7 @@ static Hash *gettable (lua_State *L, int arg) {
 
 
 /*
-** If your system does not support "stderr", redefine this function, or
+** If your system does not support `stderr', redefine this function, or
 ** redefine _ERRORMESSAGE so that it won't need _ALERT.
 */
 void luaB__ALERT (lua_State *L) {
@@ -116,9 +125,9 @@ void luaB__ERRORMESSAGE (lua_State *L) {
 
 
 /*
-** If your system does not support "stdout", you can just remove this function.
-** If you need, you can define your own "print" function, following this
-** model but changing "fputs" to put the strings at a proper place
+** If your system does not support `stdout', you can just remove this function.
+** If you need, you can define your own `print' function, following this
+** model but changing `fputs' to put the strings at a proper place
 ** (a console window or a log file, for instance).
 */
 #ifndef MAXPRINT
@@ -174,17 +183,17 @@ void luaB_error (lua_State *L) {
 }
 
 void luaB_setglobal (lua_State *L) {
-  const char *n = luaL_check_string(L, 1);
+  const char *name = luaL_check_string(L, 1);
   lua_Object value = luaL_nonnullarg(L, 2);
   lua_pushobject(L, value);
-  lua_setglobal(L, n);
+  lua_setglobal(L, name);
 }
 
 void luaB_rawsetglobal (lua_State *L) {
-  const char *n = luaL_check_string(L, 1);
+  const char *name = luaL_check_string(L, 1);
   lua_Object value = luaL_nonnullarg(L, 2);
   lua_pushobject(L, value);
-  lua_rawsetglobal(L, n);
+  lua_rawsetglobal(L, name);
 }
 
 void luaB_getglobal (lua_State *L) {
@@ -236,7 +245,7 @@ void luaB_settagmethod (lua_State *L) {
                  "function or nil expected");
 #ifndef LUA_COMPAT_GC
   if (strcmp(event, "gc") == 0 && tag != LUA_T_NIL)
-    lua_error(L, "cannot set this tag method from Lua");
+    lua_error(L, "cannot set this `gc' tag method from Lua");
 #endif
   lua_pushobject(L, nf);
   lua_pushobject(L, lua_settagmethod(L, tag, event));
@@ -325,7 +334,7 @@ void luaB_call (lua_State *L) {
       return;  /* return nil to signal the error */
     }
     else
-      lua_error(L, NULL);
+      lua_error(L, NULL);  /* propagate error without additional messages */
   }
   else {  /* no errors */
     if (strchr(options, 'p')) {  /* pack results? */
@@ -340,14 +349,14 @@ void luaB_call (lua_State *L) {
 
 void luaB_nextvar (lua_State *L) {
   lua_Object o = luaL_nonnullarg(L, 1);
-  TaggedString *g;
+  TaggedString *name;
   if (ttype(o) == LUA_T_NIL)
-    g = NULL;
+    name = NULL;
   else {
     luaL_arg_check(L, ttype(o) == LUA_T_STRING, 1, "variable name expected");
-    g = tsvalue(o);
+    name = tsvalue(o);
   }
-  if (!luaA_nextvar(L, g))
+  if (!luaA_nextvar(L, name))
     lua_pushnil(L);
 }
 
@@ -355,7 +364,7 @@ void luaB_nextvar (lua_State *L) {
 void luaB_next (lua_State *L) {
   const Hash *a = gettable(L, 1);
   lua_Object k = luaL_nonnullarg(L, 2);
-  int i;  /* will get first element after `i' */
+  int i;  /* `luaA_next' gets first element after `i' */
   if (ttype(k) == LUA_T_NIL)
     i = 0;  /* get first */
   else {
@@ -390,7 +399,8 @@ void luaB_tostring (lua_State *L) {
       sprintf(buff, "function: %p", o->value.f);
       break;
     case LUA_T_USERDATA:
-      sprintf(buff, "userdata: %p", o->value.ts->u.d.value);
+      sprintf(buff, "userdata: %p(%d)", o->value.ts->u.d.value,
+                                        o->value.ts->u.d.tag);
       break;
     case LUA_T_NIL:
       lua_pushstring(L, "nil");
@@ -435,7 +445,7 @@ void luaB_foreachi (lua_State *L) {
     luaD_call(L, L->top-3, 1);
     if (ttype(L->top-1) != LUA_T_NIL)
       return;
-    L->top--;
+    L->top--;  /* remove nil result */
   }
 }
 
@@ -499,7 +509,7 @@ void luaB_tinsert (lua_State *L) {
     pos = n+1;
   }
   luaV_setn(L, a, n+1);  /* a.n = n+1 */
-  for ( ;n>=pos; n--)
+  for (; n>=pos; n--)
     luaH_move(L, a, n, n+1);  /* a[n+1] = a[n] */
   luaH_setint(L, a, pos, v);  /* a[pos] = v */
 }
@@ -521,6 +531,7 @@ void luaB_tremove (lua_State *L) {
 /*
 ** {======================================================
 ** Quicksort
+** (based on `Algorithms in MODULA-3', Robert Sedgewick; Addison-Wesley, 1993.)
 */
 
 static void swap (lua_State *L, Hash *a, int i, int j) {
@@ -602,7 +613,7 @@ void luaB_sort (lua_State *L) {
   lua_Object func = lua_getparam(L, 2);
   luaL_arg_check(L, func == LUA_NOOBJECT || lua_isfunction(L, func), 2,
                  "function expected");
-  luaD_checkstack(L, 4);  /* for Pivot, f, a, b (sort_comp) */
+  luaD_checkstack(L, 4);  /* for pivot, f, a, b (sort_comp) */
   auxsort(L, a, 1, n, func);
   lua_pushobject(L, t);
 }
@@ -640,7 +651,7 @@ static const struct luaL_reg builtin_funcs[] = {
   {"tonumber", luaB_tonumber},
   {"tostring", luaB_tostring},
   {"type", luaB_type},
-  /* "Extra" functions */
+/* "Extra" functions */
   {"assert", luaB_assert},
   {"foreach", luaB_foreach},
   {"foreachi", luaB_foreachi},
diff --git a/lbuiltin.h b/lbuiltin.h
index 565cd3ac..031bcd82 100644
--- a/lbuiltin.h
+++ b/lbuiltin.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lbuiltin.h,v 1.4 1999/12/27 17:33:22 roberto Exp roberto $
+** $Id: lbuiltin.h,v 1.5 1999/12/28 19:23:41 roberto Exp roberto $
 ** Built-in functions
 ** See Copyright Notice in lua.h
 */
@@ -11,39 +11,38 @@
 
 void luaB__ALERT (lua_State *L);
 void luaB__ERRORMESSAGE (lua_State *L);
-void luaB_print (lua_State *L);
-void luaB_tonumber (lua_State *L);
+void luaB_assert (lua_State *L);
+void luaB_call (lua_State *L);
+void luaB_collectgarbage (lua_State *L);
+void luaB_copytagmethods (lua_State *L);
+void luaB_dofile (lua_State *L);
+void luaB_dostring (lua_State *L);
 void luaB_error (lua_State *L);
-void luaB_setglobal (lua_State *L);
-void luaB_rawsetglobal (lua_State *L);
+void luaB_foreach (lua_State *L);
+void luaB_foreachi (lua_State *L);
+void luaB_foreachvar (lua_State *L);
 void luaB_getglobal (lua_State *L);
-void luaB_rawgetglobal (lua_State *L);
-void luaB_tag (lua_State *L);
-void luaB_settag (lua_State *L);
+void luaB_getn (lua_State *L);
+void luaB_gettagmethod (lua_State *L);
 void luaB_newtag (lua_State *L);
-void luaB_copytagmethods (lua_State *L);
+void luaB_next (lua_State *L);
+void luaB_nextvar (lua_State *L);
+void luaB_print (lua_State *L);
+void luaB_rawgetglobal (lua_State *L);
 void luaB_rawgettable (lua_State *L);
+void luaB_rawsetglobal (lua_State *L);
 void luaB_rawsettable (lua_State *L);
-void luaB_settagmethod (lua_State *L);
-void luaB_gettagmethod (lua_State *L);
 void luaB_seterrormethod (lua_State *L);
-void luaB_collectgarbage (lua_State *L);
-void luaB_type (lua_State *L);
-void luaB_dostring (lua_State *L);
-void luaB_dofile (lua_State *L);
-void luaB_call (lua_State *L);
-void luaB_nextvar (lua_State *L);
-void luaB_next (lua_State *L);
-void luaB_tostring (lua_State *L);
-void luaB_assert (lua_State *L);
-void luaB_foreachi (lua_State *L);
-void luaB_foreach (lua_State *L);
-void luaB_foreachvar (lua_State *L);
-void luaB_getn (lua_State *L);
+void luaB_setglobal (lua_State *L);
+void luaB_settag (lua_State *L);
+void luaB_settagmethod (lua_State *L);
+void luaB_sort (lua_State *L);
+void luaB_tag (lua_State *L);
 void luaB_tinsert (lua_State *L);
+void luaB_tonumber (lua_State *L);
+void luaB_tostring (lua_State *L);
 void luaB_tremove (lua_State *L);
-void luaB_sort (lua_State *L);
-
+void luaB_type (lua_State *L);
 
 void luaB_predefine (lua_State *L);
 
diff --git a/lcode.c b/lcode.c
index 9ca8de7e..cf9aee47 100644
--- a/lcode.c
+++ b/lcode.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 1.1 2000/02/22 13:30:11 roberto Exp roberto $
+** $Id: lcode.c,v 1.2 2000/03/03 12:33:59 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -152,7 +152,7 @@ int luaK_kstr (LexState *ls, int c) {
 #endif
 
 static int real_constant (LexState *ls, real r) {
-  /* check whether `r' has appeared within the last LIM entries */
+  /* check whether `r' has appeared within the last LOOKBACKNUMS entries */
   TProtoFunc *f = ls->fs->f;
   int c = f->nknum;
   int lim = c < LOOKBACKNUMS ? 0 : c-LOOKBACKNUMS;
diff --git a/ldblib.c b/ldblib.c
index 3634d213..ce6cfa2a 100644
--- a/ldblib.c
+++ b/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.9 1999/12/21 18:04:41 roberto Exp roberto $
+** $Id: ldblib.c,v 1.10 2000/01/19 12:00:45 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -50,7 +50,7 @@ static void getstack (lua_State *L) {
     lua_Object res = lua_createtable(L);
     if (!lua_getinfo(L, options, &ar))
       luaL_argerror(L, 2, "invalid option");
-    for ( ;*options; options++) {
+    for (; *options; options++) {
       switch (*options) {
         case 'S':
           settabss(L, res, "source", ar.source);
@@ -103,6 +103,10 @@ static void setlocal (lua_State *L) {
 }
 
 
+/*
+** because of these variables, this module is not reentrant, and should
+** not be used in multiple states
+*/
 
 static int linehook = LUA_NOREF;  /* Lua reference to line hook function */
 static int callhook = LUA_NOREF;  /* Lua reference to call hook function */
diff --git a/ldebug.c b/ldebug.c
index da473b08..45214b8f 100644
--- a/ldebug.c
+++ b/ldebug.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 1.8 2000/02/11 16:52:54 roberto Exp roberto $
+** $Id: ldebug.c,v 1.9 2000/02/17 18:30:36 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -187,7 +187,7 @@ static void lua_getobjname (lua_State *L, StkId f, lua_Dbgactreg *ar) {
 int lua_getinfo (lua_State *L, const char *what, lua_Dbgactreg *ar) {
   StkId func = ar->_func;
   LUA_ASSERT(L, is_T_MARK(ttype(func)), "invalid activation record");
-  for ( ;*what; what++) {
+  for (; *what; what++) {
     switch (*what) {
       case 'S':
         lua_funcinfo(ar);
diff --git a/ldo.c b/ldo.c
index 694da7bf..be7a4266 100644
--- a/ldo.c
+++ b/ldo.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.66 2000/01/19 12:00:45 roberto Exp roberto $
+** $Id: ldo.c,v 1.67 2000/02/08 16:34:31 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -52,7 +52,7 @@ void luaD_checkstack (lua_State *L, int n) {
     if (L->stack_last-L->stack > (L->stacksize-1)) {
       /* overflow while handling overflow: do what?? */
       L->top -= EXTRA_STACK;
-      lua_error(L, "BAD STACK OVERFLOW! DATA CORRUPTED!!");
+      lua_error(L, "BAD STACK OVERFLOW! DATA CORRUPTED!");
     }
     else {
       lua_Dbgactreg dummy;
@@ -62,7 +62,7 @@ void luaD_checkstack (lua_State *L, int n) {
         lua_error(L, "Lua2C - C2Lua overflow");
       }
       else
-        lua_error(L, "stack size overflow");
+        lua_error(L, "stack overflow; possible recursion loop");
     }
   }
 }
@@ -254,7 +254,7 @@ void lua_error (lua_State *L, const char *s) {
   if (L->errorJmp)
     longjmp(L->errorJmp->b, 1);
   else {
-    message(L, "unable to recover. exiting.\n");
+    message(L, "unable to recover; exiting\n");
     exit(1);
   }
 }
@@ -301,7 +301,7 @@ static int protectedparser (lua_State *L, ZIO *z, int bin) {
   TProtoFunc *volatile tf;
   struct lua_longjmp *volatile oldErr = L->errorJmp;
   L->errorJmp = &myErrorJmp;
-  L->top = base;   /* erase C2Lua */
+  L->top = base;   /* clear C2Lua */
   if (setjmp(myErrorJmp.b) == 0) {
     tf = bin ? luaU_undump1(L, z) : luaY_parser(L, z);
     status = 0;
diff --git a/lfunc.c b/lfunc.c
index c2ea14f4..fad91ace 100644
--- a/lfunc.c
+++ b/lfunc.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.c,v 1.17 2000/01/25 13:57:18 roberto Exp roberto $
+** $Id: lfunc.c,v 1.18 2000/01/28 16:53:00 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -14,7 +14,7 @@
 #include "lstate.h"
 
 #define gcsizeproto(L, p)       numblocks(L, 0, sizeof(TProtoFunc))
-#define gcsizeclosure(L, c) numblocks(L, c->nelems, sizeof(Closure))
+#define gcsizeclosure(L, c)     numblocks(L, c->nelems, sizeof(Closure))
 
 
 
diff --git a/liolib.c b/liolib.c
index 0d75ac0d..b65d5ae4 100644
--- a/liolib.c
+++ b/liolib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: liolib.c,v 1.56 2000/01/19 12:00:45 roberto Exp roberto $
+** $Id: liolib.c,v 1.57 2000/02/08 16:34:31 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
@@ -97,7 +97,7 @@ static FILE *gethandle (lua_State *L, lua_Object f) {
 static FILE *getfilebyname (lua_State *L, const char *name) {
   FILE *handle = gethandle(L, lua_rawgetglobal(L, name));
   if (!handle)
-    luaL_verror(L, "global variable `%.50s' is not a file handle", name);
+    luaL_verror(L, "`%.50s' is not a file handle", name);
   return handle;
 }
 
@@ -286,7 +286,7 @@ static int read_pattern (lua_State *L, FILE *f, const char *p) {
 
 #else
 
-#define read_pattern(L, f,p)   (lua_error(L, "read patterns are deprecated"), 0)
+#define read_pattern(L, f, p) (lua_error(L, "read patterns are deprecated"), 0)
 
 #endif
 
@@ -525,9 +525,6 @@ static void io_debug (lua_State *L) {
 #define MAXMESSAGE (MESSAGESIZE*10)
 
 
-#define MAXSRC          60
-
-
 static void errorfb (lua_State *L) {
   char buff[MAXMESSAGE];
   int level = 1;  /* skip level 0 (it's this function) */
@@ -535,10 +532,10 @@ static void errorfb (lua_State *L) {
   lua_Object alertfunc = lua_rawgetglobal(L, "_ALERT");
   sprintf(buff, "error: %.200s\n", lua_getstring(L, lua_getparam(L, 1)));
   while (lua_getstack(L, level++, &ar)) {
-    char buffchunk[MAXSRC];
+    char buffchunk[60];
     lua_getinfo(L, "Snl", &ar);
     luaL_chunkid(buffchunk, ar.source, sizeof(buffchunk));
-    if (level == 2) strcat(buff, "Active Stack:\n");
+    if (level == 2) strcat(buff, "Stack traceback:\n");
     strcat(buff, "  ");
     if (strlen(buff) > MAXMESSAGE-MESSAGESIZE) {
       strcat(buff, "...\n");
diff --git a/llex.c b/llex.c
index 19edb8f0..6745fbbc 100644
--- a/llex.c
+++ b/llex.c
@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 1.50 2000/01/26 18:51:49 roberto Exp roberto $
+** $Id: llex.c,v 1.51 2000/02/08 16:34:31 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -23,7 +23,7 @@
 
 
 
-#define next(LS) (LS->current = zgetc(LS->lex_z))
+#define next(LS) (LS->current = zgetc(LS->z))
 
 
 #define save(L, c)      luaL_addchar(L, c)
@@ -37,7 +37,7 @@ static const char *const token2string [] = {"and", "do", "else", "elseif", "end"
 
 
 void luaX_init (lua_State *L) {
-  unsigned int i;
+  int i;
   for (i=0; i<NUM_RESERVED; i++) {
     TaggedString *ts = luaS_new(L, token2string[i]);
     ts->marked = (unsigned char)(RESERVEDMARK+i);  /* reserved word */
@@ -49,7 +49,7 @@ void luaX_init (lua_State *L) {
 
 void luaX_syntaxerror (LexState *ls, const char *s, const char *token) {
   char buff[MAXSRC];
-  luaL_chunkid(buff, zname(ls->lex_z), sizeof(buff));
+  luaL_chunkid(buff, zname(ls->z), sizeof(buff));
   luaL_verror(ls->L, "%.100s;\n  last token read: `%.50s' at line %d in %.80s",
               s, token, ls->linenumber, buff);
 }
@@ -86,10 +86,10 @@ static void luaX_invalidchar (LexState *ls, int c) {
 
 static void firstline (LexState *LS)
 {
-  int c = zgetc(LS->lex_z);
+  int c = zgetc(LS->z);
   if (c == '#')
-    while ((c=zgetc(LS->lex_z)) != '\n' && c != EOZ) /* skip first line */;
-  zungetc(LS->lex_z);
+    while ((c=zgetc(LS->z)) != '\n' && c != EOZ) /* skip first line */;
+  zungetc(LS->z);
 }
 
 
@@ -100,7 +100,7 @@ void luaX_setinput (lua_State *L, LexState *LS, ZIO *z) {
   LS->iflevel = 0;
   LS->ifstate[0].skip = 0;
   LS->ifstate[0].elsepart = 1;  /* to avoid a free $else */
-  LS->lex_z = z;
+  LS->z = z;
   LS->fs = NULL;
   firstline(LS);
   luaL_resetbuffer(L);
@@ -322,7 +322,7 @@ int luaX_lex (LexState *LS) {
   for (;;) {
     switch (LS->current) {
 
-      case ' ': case '\t': case '\r':  /* CR: to avoid problems with DOS */
+      case ' ': case '\t': case '\r':  /* `\r' to avoid problems with DOS */
         next(LS);
         continue;
 
diff --git a/llex.h b/llex.h
index 8b11cd64..93097010 100644
--- a/llex.h
+++ b/llex.h
@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h,v 1.17 2000/01/25 18:44:21 roberto Exp roberto $
+** $Id: llex.h,v 1.18 2000/02/08 16:34:31 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -11,7 +11,7 @@
 #include "lzio.h"
 
 
-#define FIRST_RESERVED  260
+#define FIRST_RESERVED  257
 
 /* maximum length of a reserved word (+1 for final 0) */
 #define TOKEN_LEN       15
@@ -30,7 +30,8 @@ enum RESERVED {
   NAME, CONC, DOTS, EQ, GE, LE, NE, NUMBER, STRING, EOS
 };
 
-#define NUM_RESERVED    (WHILE-FIRST_RESERVED+1)  /* number of reserved words */
+/* number of reserved words */
+#define NUM_RESERVED    ((int)(WHILE-FIRST_RESERVED+1))
 
 
 #ifndef MAX_IFS
@@ -49,13 +50,13 @@ struct ifState {
 typedef struct LexState {
   int current;  /* look ahead character */
   int token;  /* look ahead token */
-  struct FuncState *fs;  /* `FuncState' is private for the parser */
+  struct FuncState *fs;  /* `FuncState' is private to the parser */
   struct lua_State *L;
   union {
     real r;
     TaggedString *ts;
   } seminfo;  /* semantics information */
-  struct zio *lex_z;  /* input stream */
+  struct zio *z;  /* input stream */
   int linenumber;  /* input line counter */
   int iflevel;  /* level of nested $if's (for lexical analysis) */
   struct ifState ifstate[MAX_IFS];
diff --git a/lmem.c b/lmem.c
index c8cbb0fe..9c9073f0 100644
--- a/lmem.c
+++ b/lmem.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.c,v 1.24 2000/01/13 16:30:47 roberto Exp roberto $
+** $Id: lmem.c,v 1.25 2000/02/08 16:34:31 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -43,7 +43,9 @@
 #define free(b)         debug_realloc(b, 0)
 
 
-#define HEADER          (sizeof(double))  /* maximum alignment */
+/* ensures maximum alignment for HEADER */
+#define HEADER  (sizeof(double)>sizeof(long) ? sizeof(double) : sizeof(long))
+
 #define MARKSIZE        16
 #define MARK            0x55  /* 01010101 (a nice pattern) */
 
@@ -77,21 +79,21 @@ static void freeblock (void *block) {
 
 
 static void *debug_realloc (void *block, size_t size) {
-  size_t realsize = HEADER+size+MARKSIZE;
   if (size == 0) {
     freeblock(block);
     return NULL;
   }
   else {
+    size_t realsize = HEADER+size+MARKSIZE;
     char *newblock = (char *)(malloc)(realsize);  /* alloc a new block */
     int i;
+    if (newblock == NULL) return NULL;
     if (block) {
       size_t oldsize = *blocksize(block);
       if (oldsize > size) oldsize = size;
       memcpy(newblock+HEADER, block, oldsize);
       freeblock(block);  /* erase (and check) old copy */
     }
-    if (newblock == NULL) return NULL;
     memdebug_total += size;
     memdebug_numblocks++;
     *(unsigned long *)newblock = size;
@@ -123,14 +125,13 @@ void *luaM_growaux (lua_State *L, void *block, unsigned long nelems,
 ** generic allocation routine.
 */
 void *luaM_realloc (lua_State *L, void *block, unsigned long size) {
-  size_t s = (size_t)size;
-  if (s != size)
-    lua_error(L, "memory allocation error: block too big");
   if (size == 0) {
     free(block);  /* block may be NULL; that is OK for free */
     return NULL;
   }
-  block = realloc(block, s);
+  else if ((size_t)size != size)
+    lua_error(L, "memory allocation error: block too big");
+  block = realloc(block, size);
   if (block == NULL)
     lua_error(L, memEM);
   return block;
diff --git a/lobject.c b/lobject.c
index af98ebf6..617815d8 100644
--- a/lobject.c
+++ b/lobject.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.c,v 1.30 2000/01/25 18:44:21 roberto Exp roberto $
+** $Id: lobject.c,v 1.31 2000/02/17 18:30:36 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -16,7 +16,7 @@
 const char *const luaO_typenames[] = { /* ORDER LUA_T */
     "userdata", "number", "string", "table", "function", "function", "nil",
     "function", "function", "function", "function", "function", "function",
-    "line", "global", "local", "field", NULL
+    "line", NULL
 };
 
 
diff --git a/lobject.h b/lobject.h
index a5eb77d7..20368bdf 100644
--- a/lobject.h
+++ b/lobject.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 1.48 2000/02/17 18:30:36 roberto Exp roberto $
+** $Id: lobject.h,v 1.49 2000/02/21 18:33:26 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -14,15 +14,13 @@
 
 
 #ifdef DEBUG
-#ifdef NDEBUG
 #undef NDEBUG
-#endif
 #include <assert.h>
 #define LUA_INTERNALERROR(L,s)  assert(0)
 #define LUA_ASSERT(L,c,s)       assert(c)
 #else
 #define LUA_INTERNALERROR(L,s)  /* empty */
-#define LUA_ASSERT(L,c,s)               /* empty */
+#define LUA_ASSERT(L,c,s)       /* empty */
 #endif
 
 
@@ -51,7 +49,7 @@ typedef unsigned long Instruction;
 
 /* conversion of pointer to int (for hashing only) */
 /* (the shift removes bits that are usually 0 because of alignment) */
-#define IntPoint(L, p)  (((unsigned int)(p)) >> 3)
+#define IntPoint(L, p)  (((unsigned long)(p)) >> 3)
 
 
 /*
@@ -68,21 +66,21 @@ typedef unsigned long Instruction;
 ** grep "ORDER LUA_T"
 */
 typedef enum {
-  LUA_T_USERDATA =  0,  /* default tag for userdata */
-  LUA_T_NUMBER   = -1,  /* fixed tag for numbers */
-  LUA_T_STRING   = -2,  /* fixed tag for strings */
-  LUA_T_ARRAY    = -3,  /* default tag for tables (or arrays) */
-  LUA_T_LPROTO   = -4,  /* fixed tag for Lua functions */
-  LUA_T_CPROTO   = -5,  /* fixed tag for C functions */
-  LUA_T_NIL      = -6,  /* last "pre-defined" tag */
+  LUA_T_USERDATA  =  0, /* default tag for userdata */
+  LUA_T_NUMBER    = -1, /* fixed tag for numbers */
+  LUA_T_STRING    = -2, /* fixed tag for strings */
+  LUA_T_ARRAY     = -3, /* default tag for tables (or arrays) */
+  LUA_T_LPROTO    = -4, /* fixed tag for Lua functions */
+  LUA_T_CPROTO    = -5, /* fixed tag for C functions */
+  LUA_T_NIL       = -6, /* last "pre-defined" tag */
 
   LUA_T_LCLOSURE  = -7, /* Lua closure */
   LUA_T_CCLOSURE  = -8, /* C closure */
 
   LUA_T_LCLMARK   = -9 ,/* mark for Lua closures */
   LUA_T_CCLMARK   = -10,/* mark for C closures */
-  LUA_T_LMARK    = -11, /* mark for Lua prototypes */
-  LUA_T_CMARK    = -12, /* mark for C prototypes */
+  LUA_T_LMARK     = -11,/* mark for Lua prototypes */
+  LUA_T_CMARK     = -12,/* mark for C prototypes */
 
   LUA_T_LINE     = -13
 } lua_Type;
@@ -93,7 +91,7 @@ typedef enum {
 #define LAST_REGULAR_TAG  LUA_T_CCLOSURE  /* after that, are all marks */
 
 /*
-** chech whether `t' is a mark; ttypes are negative numbers, so the
+** check whether `t' is a mark; ttypes are negative numbers, so the
 ** comparisons look reversed.  (ORDER LUA_T)
 */
 #define is_T_MARK(t)    (LUA_T_CMARK <= (t) && (t) <= LUA_T_LCLMARK)
@@ -221,6 +219,7 @@ typedef struct Hash {
 
 
 extern const char *const luaO_typenames[];
+extern const TObject luaO_nilobject;
 
 #define luaO_typename(o)        luaO_typenames[-ttype(o)]
 
@@ -228,11 +227,7 @@ extern const char *const luaO_typenames[];
 
 unsigned long luaO_power2 (unsigned long n);
 
-extern const TObject luaO_nilobject;
-
-
-#define luaO_equalObj(t1,t2)    ((ttype(t1) != ttype(t2)) ? 0 \
-                                      : luaO_equalval(t1,t2))
+#define luaO_equalObj(t1,t2)  (ttype(t1) == ttype(t2) && luaO_equalval(t1,t2))
 int luaO_equalval (const TObject *t1, const TObject *t2);
 int luaO_redimension (lua_State *L, int oldsize);
 int luaO_str2d (const char *s, real *result);
diff --git a/lopcodes.h b/lopcodes.h
index 16f22d45..c822049c 100644
--- a/lopcodes.h
+++ b/lopcodes.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.41 2000/02/22 13:30:11 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.42 2000/03/02 12:32:53 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -21,9 +21,11 @@
           2nd unsigned argument in the middle 8 bits       (`B')
 
   The signed argument is represented in excess 2^23; that is, the real value
-  is 2^23 minus the usigned value.
+  is the usigned value minus 2^23.
 ===========================================================================*/
 
+#define EXCESS_S        (1<<23)         /* == 2^23 */
+
 /*
 ** the following macros help to manipulate instructions
 */
@@ -35,13 +37,13 @@
 
 #define GET_OPCODE(i)   ((OpCode)((i)&0xFF))
 #define GETARG_U(i)     ((int)((i)>>8))
-#define GETARG_S(i)     ((int)((i)>>8)-(1<<23))
+#define GETARG_S(i)     ((int)((i)>>8)-EXCESS_S)
 #define GETARG_A(i)     ((int)((i)>>16))
 #define GETARG_B(i)     ((int)(((i)>>8) & 0xFF))
 
 #define SET_OPCODE(i,o) (((i)&0xFFFFFF00u) | (Instruction)(o))
 #define SETARG_U(i,u)   (((i)&0x000000FFu) | ((Instruction)(u)<<8))
-#define SETARG_S(i,s)   (((i)&0x000000FFu) | ((Instruction)((s)+(1<<23))<<8))
+#define SETARG_S(i,s)   (((i)&0x000000FFu) | ((Instruction)((s)+EXCESS_S)<<8))
 #define SETARG_A(i,a)   (((i)&0x0000FFFFu) | ((Instruction)(a)<<16))
 #define SETARG_B(i,b)   (((i)&0xFFFF00FFu) | ((Instruction)(b)<<8))
 
@@ -55,8 +57,9 @@
 */
 
 typedef enum {
-/* name          parm    before          after           side effect
------------------------------------------------------------------------------*/
+/*----------------------------------------------------------------------
+name            args    stack before    stack after     side effects
+------------------------------------------------------------------------*/
 ENDCODE,/*      -       -               (return)                        */
 RETCODE,/*      U       -               (return)                        */
 
diff --git a/lparser.c b/lparser.c
index 643dce0f..1cdc35b6 100644
--- a/lparser.c
+++ b/lparser.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.c,v 1.60 2000/02/22 13:30:11 roberto Exp roberto $
+** $Id: lparser.c,v 1.61 2000/03/03 12:33:59 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -434,7 +434,7 @@ static int funcparams (LexState *ls, int slf) {
       break;
 
     case STRING:  /* funcparams -> STRING */
-      code_string(ls, ls->seminfo.ts);  /* must use 'seminfo' before `next' */
+      code_string(ls, ls->seminfo.ts);  /* must use `seminfo' before `next' */
       next(ls);
       break;
 
@@ -660,7 +660,7 @@ static void simpleexp (LexState *ls, expdesc *v) {
     }
 
     case STRING:  /* simpleexp -> STRING */
-      /* must use 'seminfo' before `next' */
+      /* must use `seminfo' before `next' */
       v->info = code_string(ls, ls->seminfo.ts);
       next(ls);
       break;
@@ -930,7 +930,7 @@ static void namestat (LexState *ls) {
   check_debugline(ls);
   var_or_func(ls, &v);
   if (v.k == VEXP) {  /* stat -> func */
-    if (!luaK_iscall(ls, v.info))  /* is just an upper value? */
+    if (!luaK_iscall(ls, v.info))  /* is just an upvalue? */
       luaK_error(ls, "syntax error");
     luaK_setcallreturns(ls, v.info, 0);  /* call statement uses no results */
   }
@@ -1006,7 +1006,7 @@ static int stat (LexState *ls) {
       return 1;
 
     case RETURN: case ';': case ELSE: case ELSEIF:
-    case END: case UNTIL: case EOS:  /* 'stat' follow */
+    case END: case UNTIL: case EOS:  /* `stat' follow */
       return 0;
 
     default:
diff --git a/lparser.h b/lparser.h
index 2414a14c..a3568a6f 100644
--- a/lparser.h
+++ b/lparser.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h,v 1.6 2000/02/22 13:30:11 roberto Exp roberto $
+** $Id: lparser.h,v 1.7 2000/03/03 12:33:59 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -14,31 +14,31 @@
 
 /* maximum number of local variables */
 #ifndef MAXLOCALS
-#define MAXLOCALS 200  /* arbitrary limit (<=MAXARG_B) */
+#define MAXLOCALS 200           /* arbitrary limit (<=MAXARG_B) */
 #endif
 
 
 /* maximum number of upvalues */
 #ifndef MAXUPVALUES
-#define MAXUPVALUES 32  /* arbitrary limit (<=MAXARG_B) */
+#define MAXUPVALUES 32          /* arbitrary limit (<=MAXARG_B) */
 #endif
 
 
 /* maximum number of variables in the left side of an assignment */
 #ifndef MAXVARSLH
-#define MAXVARSLH       100  /* arbitrary limit (<=MAXARG_B) */
+#define MAXVARSLH 100           /* arbitrary limit (<=MAXARG_B) */
 #endif
 
 
 /* maximum number of parameters in a function */
 #ifndef MAXPARAMS
-#define MAXPARAMS       100  /* arbitrary limit (<=MAXLOCALS) */
+#define MAXPARAMS 100           /* arbitrary limit (<=MAXLOCALS) */
 #endif
 
 
 /* maximum stack size in a function */
 #ifndef MAXSTACK
-#define MAXSTACK        256  /* arbitrary limit (<=MAXARG_A) */
+#define MAXSTACK 256            /* arbitrary limit (<=MAXARG_A) */
 #endif
 
 
diff --git a/lref.c b/lref.c
index 2bfa773f..eeb720a2 100644
--- a/lref.c
+++ b/lref.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lref.c,v 1.6 1999/12/27 17:33:22 roberto Exp roberto $
+** $Id: lref.c,v 1.7 2000/02/08 16:34:31 roberto Exp roberto $
 ** reference mechanism
 ** See Copyright Notice in lua.h
 */
@@ -16,7 +16,7 @@
 
 int lua_ref (lua_State *L,  int lock) {
   int ref;
-  luaA_checkCparams(L, 1);
+  luaA_checkCargs(L, 1);
   if (ttype(L->top-1) == LUA_T_NIL)
     ref = LUA_REFNIL;
   else {
@@ -39,7 +39,8 @@ int lua_ref (lua_State *L,  int lock) {
 void lua_unref (lua_State *L, int ref) {
   if (ref >= 0) {
     if (ref >= L->refSize || L->refArray[ref].st >= 0)
-      lua_error(L, "API error - invalid parameter for function `lua_unref'");
+      lua_error(L, "Lua API error - "
+                   "invalid argument for function `lua_unref'");
     L->refArray[ref].st = L->refFree;
     L->refFree = ref;
   }
@@ -67,7 +68,7 @@ void lua_beginblock (lua_State *L) {
 
 void lua_endblock (lua_State *L) {
   if (L->numCblocks <= 0)
-    lua_error(L, "API error - no block to end");
+    lua_error(L, "Lua API error - no block to end");
   --L->numCblocks;
   L->Cstack = L->Cblocks[L->numCblocks];
   L->top = L->Cstack.base;
diff --git a/lstring.c b/lstring.c
index 85ede619..42cf255f 100644
--- a/lstring.c
+++ b/lstring.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.c,v 1.30 1999/11/26 18:59:20 roberto Exp roberto $
+** $Id: lstring.c,v 1.31 1999/12/14 18:42:57 roberto Exp roberto $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -18,7 +18,7 @@
 
 
 #define gcsizestring(L, l)      numblocks(L, 0, sizeof(TaggedString)+l)
-#define gcsizeudata     gcsizestring(L, 0)
+#define gcsizeudata             gcsizestring(L, 0)
 
 
 
diff --git a/lstring.h b/lstring.h
index 040a590c..1bc3bac0 100644
--- a/lstring.h
+++ b/lstring.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.h,v 1.14 1999/11/26 18:59:20 roberto Exp roberto $
+** $Id: lstring.h,v 1.15 1999/12/14 18:42:57 roberto Exp roberto $
 ** String table (keep all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,8 +12,8 @@
 #include "lstate.h"
 
 
-#define NUM_HASHSTR     31  /* a prime not in array `dimensions' */
-#define NUM_HASHUDATA   31  /* idem */
+#define NUM_HASHSTR     31
+#define NUM_HASHUDATA   31
 #define NUM_HASHS (NUM_HASHSTR+NUM_HASHUDATA)
 
 
diff --git a/lstrlib.c b/lstrlib.c
index 713cc72e..3a1d8ba3 100644
--- a/lstrlib.c
+++ b/lstrlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lstrlib.c,v 1.39 1999/12/27 17:33:22 roberto Exp roberto $
+** $Id: lstrlib.c,v 1.40 2000/02/08 16:34:31 roberto Exp roberto $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
@@ -116,8 +116,8 @@ static void str_char (lua_State *L) {
 ** =======================================================
 */
 
-#ifndef MAX_CAPT
-#define MAX_CAPT 32  /* arbitrary limit */
+#ifndef MAX_CAPTURES
+#define MAX_CAPTURES 32  /* arbitrary limit */
 #endif
 
 
@@ -127,12 +127,12 @@ struct Capture {
   struct {
     const char *init;
     int len;  /* -1 signals unfinished capture */
-  } capture[MAX_CAPT];
+  } capture[MAX_CAPTURES];
 };
 
 
-#define ESC     '%'
-#define SPECIALS  "^$*+?.([%-"
+#define ESC             '%'
+#define SPECIALS        "^$*+?.([%-"
 
 
 static void push_captures (lua_State *L, struct Capture *cap) {
@@ -145,7 +145,7 @@ static void push_captures (lua_State *L, struct Capture *cap) {
 }
 
 
-static int check_cap (lua_State *L, int l, struct Capture *cap) {
+static int check_capture (lua_State *L, int l, struct Capture *cap) {
   l -= '1';
   if (!(0 <= l && l < cap->level && cap->capture[l].len != -1))
     lua_error(L, "invalid capture index");
@@ -165,12 +165,12 @@ static int capture_to_close (lua_State *L, struct Capture *cap) {
 const char *luaI_classend (lua_State *L, const char *p) {
   switch (*p++) {
     case ESC:
-      if (*p == '\0') lua_error(L, "incorrect pattern (ends with `%')");
+      if (*p == '\0') lua_error(L, "malformed pattern (ends with `%')");
       return p+1;
     case '[':
       if (*p == '^') p++;
       do {  /* look for a ']' */
-        if (*p == '\0') lua_error(L, "incorrect pattern (missing `]')");
+        if (*p == '\0') lua_error(L, "malformed pattern (missing `]')");
         if (*(p++) == ESC && *p != '\0') p++;  /* skip escapes (e.g. '%]') */
       } while (*p != ']');
       return p+1;
@@ -180,7 +180,7 @@ const char *luaI_classend (lua_State *L, const char *p) {
 }
 
 
-static int matchclass (int c, int cl) {
+static int match_class (int c, int cl) {
   int res;
   switch (tolower(cl)) {
     case 'a' : res = isalpha(c); break;
@@ -209,7 +209,7 @@ static int matchbracketclass (int c, const char *p, const char *endclass) {
   while (++p < endclass) {
     if (*p == ESC) {
       p++;
-      if (matchclass(c, (unsigned char)*p))
+      if (match_class(c, (unsigned char)*p))
         return sig;
     }
     else if ((*(p+1) == '-') && (p+2 < endclass)) {
@@ -217,7 +217,7 @@ static int matchbracketclass (int c, const char *p, const char *endclass) {
       if ((int)(unsigned char)*(p-2) <= c && c <= (int)(unsigned char)*p)
         return sig;
     }
-    else if ((unsigned char)*p == c) return sig;
+    else if ((int)(unsigned char)*p == c) return sig;
   }
   return !sig;
 }
@@ -229,7 +229,7 @@ int luaI_singlematch (int c, const char *p, const char *ep) {
     case '.':  /* matches any char */
       return 1;
     case ESC:
-      return matchclass(c, (unsigned char)*(p+1));
+      return match_class(c, (unsigned char)*(p+1));
     case '[':
       return matchbracketclass(c, p, ep-1);
     default:
@@ -289,11 +289,11 @@ static const char *min_expand (lua_State *L, const char *s, const char *p, const
 }
 
 
-static const char *start_capt (lua_State *L, const char *s, const char *p,
-                               struct Capture *cap) {
+static const char *start_capture (lua_State *L, const char *s, const char *p,
+                                  struct Capture *cap) {
   const char *res;
   int level = cap->level;
-  if (level >= MAX_CAPT) lua_error(L, "too many captures");
+  if (level >= MAX_CAPTURES) lua_error(L, "too many captures");
   cap->capture[level].init = s;
   cap->capture[level].len = -1;
   cap->level = level+1;
@@ -303,8 +303,8 @@ static const char *start_capt (lua_State *L, const char *s, const char *p,
 }
 
 
-static const char *end_capt (lua_State *L, const char *s, const char *p,
-                             struct Capture *cap) {
+static const char *end_capture (lua_State *L, const char *s, const char *p,
+                                struct Capture *cap) {
   int l = capture_to_close(L, cap);
   const char *res;
   cap->capture[l].len = s - cap->capture[l].init;  /* close capture */
@@ -316,7 +316,7 @@ static const char *end_capt (lua_State *L, const char *s, const char *p,
 
 static const char *match_capture (lua_State *L, const char *s, int level,
                                   struct Capture *cap) {
-  int l = check_cap(L, level, cap);
+  int l = check_capture(L, level, cap);
   int len = cap->capture[l].len;
   if (cap->src_end-s >= len &&
       memcmp(cap->capture[l].init, s, len) == 0)
@@ -329,9 +329,9 @@ static const char *match (lua_State *L, const char *s, const char *p, struct Cap
   init: /* using goto's to optimize tail recursion */
   switch (*p) {
     case '(':  /* start capture */
-      return start_capt(L, s, p, cap);
+      return start_capture(L, s, p, cap);
     case ')':  /* end capture */
-      return end_capt(L, s, p, cap);
+      return end_capture(L, s, p, cap);
     case ESC:  /* may be %[0-9] or %b */
       if (isdigit((unsigned char)(*(p+1)))) {  /* capture? */
         s = match_capture(L, s, *(p+1), cap);
@@ -444,7 +444,7 @@ static void add_s (lua_State *L, lua_Object newp, struct Capture *cap) {
         if (!isdigit((unsigned char)news[i]))
           luaL_addchar(L, news[i]);
         else {
-          int level = check_cap(L, news[i], cap);
+          int level = check_capture(L, news[i], cap);
           addnchar(L, cap->capture[level].init, cap->capture[level].len);
         }
       }
@@ -576,7 +576,7 @@ static void str_format (lua_State *L) {
           long l;
           const char *s = luaL_check_lstr(L, arg, &l);
           if (cap.capture[1].len == 0 && l >= 100) {
-            /* no precision and string is too big to be formatted;
+            /* no precision and string is too long to be formatted;
                keep original string */
             addnchar(L, s, l);
             continue;  /* skip the "addsize" at the end */
diff --git a/ltable.c b/ltable.c
index bd250e53..be45da44 100644
--- a/ltable.c
+++ b/ltable.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 1.33 1999/12/23 18:19:57 roberto Exp roberto $
+** $Id: ltable.c,v 1.34 2000/02/08 16:34:31 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -32,7 +32,7 @@
 
 
 
-#define TagDefault LUA_T_ARRAY;
+#define TagDefault LUA_T_ARRAY
 
 
 
diff --git a/ltm.c b/ltm.c
index f9812bc9..3a79d48b 100644
--- a/ltm.c
+++ b/ltm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 1.31 2000/01/19 12:00:45 roberto Exp roberto $
+** $Id: ltm.c,v 1.32 2000/02/22 18:12:46 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -147,7 +147,7 @@ void luaT_settagmethod (lua_State *L, int t, const char *event, TObject *func) {
   e = luaI_checkevent(L, event, luaT_eventname);
   checktag(L, t);
   if (!luaT_validevent(t, e))
-    luaL_verror(L, "cannot change tag method `%.20s' for type `%.20s'%.20s",
+    luaL_verror(L, "cannot change `%.20s' tag method for type `%.20s'%.20s",
                 luaT_eventname[e], luaO_typenames[-t],
                 (t == LUA_T_ARRAY || t == LUA_T_USERDATA) ? " with default tag"
                                                           : "");
diff --git a/ltm.h b/ltm.h
index 3d517e3e..21eec17c 100644
--- a/ltm.h
+++ b/ltm.h
@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 1.8 1999/11/22 13:12:07 roberto Exp roberto $
+** $Id: ltm.h,v 1.9 2000/02/22 18:12:46 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -30,11 +30,10 @@ typedef enum {
   IM_LT,
   IM_CONCAT,
   IM_GC,
-  IM_FUNCTION
+  IM_FUNCTION,
+  IM_N          /* number of elements in the enum */
 } IMS;
 
-#define IM_N 15
-
 
 struct IM {
   TObject int_method[IM_N];
diff --git a/lua.c b/lua.c
index 098aa7cf..e55596cc 100644
--- a/lua.c
+++ b/lua.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.32 2000/01/19 16:50:14 roberto Exp roberto $
+** $Id: lua.c,v 1.33 2000/02/21 18:30:42 roberto Exp roberto $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -87,16 +87,10 @@ static void print_version (void) {
 
 
 static void assign (char *arg) {
-  char buffer[500];
-  if (strlen(arg) >= sizeof(buffer))
-    fprintf(stderr, "lua: shell argument too long");
-  else {
-    char *eq = strchr(arg, '=');
-    lua_pushstring(eq+1);
-    strncpy(buffer, arg, eq-arg);
-    buffer[eq-arg] = 0;
-    lua_setglobal(buffer);
-  }
+  char *eq = strchr(arg, '=');
+  *eq = '\0';  /* spilt `arg' in two strings (name & value) */
+  lua_pushstring(eq+1);
+  lua_setglobal(arg);
 }
 
 
@@ -139,7 +133,7 @@ static void manual_input (int prompt) {
     if (prompt) {
       const char *s = lua_getstring(lua_getglobal("_PROMPT"));
       if (!s) s = PROMPT;
-      printf("%s", s);
+      fputs(s, stdout);
     }
     for(;;) {
       int c = getchar();
@@ -153,7 +147,7 @@ static void manual_input (int prompt) {
         else break;
       }
       else if (i >= BUFSIZ-1) {
-        fprintf(stderr, "lua: argument line too long\n");
+        fprintf(stderr, "lua: input line too long\n");
         break;
       }
       else buffer[i++] = (char)c;
@@ -217,9 +211,9 @@ int main (int argc, char *argv[]) {
             print_message();
             exit(1);
           }
-          getargs(argc-i, argv+i);  /* collect following arguments */
+          getargs(argc-i, argv+i);  /* collect remaining arguments */
           file_input(argv, i);
-          i = argc;  /* stop running arguments */
+          i = argc;  /* stop scanning arguments */
           break;
         default:
           print_message();
diff --git a/lundump.c b/lundump.c
index 01da4afb..7aa0a93d 100644
--- a/lundump.c
+++ b/lundump.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c,v 1.16 1999/12/02 19:11:51 roberto Exp roberto $
+** $Id: lundump.c,v 1.26 2000/02/17 19:17:44 lhf Exp lhf $
 ** load bytecodes from files
 ** See Copyright Notice in lua.h
 */
@@ -50,22 +50,13 @@ static unsigned long LoadLong (lua_State* L, ZIO* Z)
  return (hi<<16)|lo;
 }
 
-static real LoadNumber (lua_State* L, ZIO* Z, int native)
+static real LoadNumber (lua_State* L, ZIO* Z)
 {
- if (native)
- {
-  real x;
-  LoadBlock(L,&x,sizeof(x),Z);
-  return x;
- }
- else
- {
-  char b[256];
-  int size=ezgetc(L,Z);
-  LoadBlock(L,b,size,Z);
-  b[size]=0;
-  return luaU_str2d(L,b,zname(Z));
- }
+ char b[256];
+ int size=ezgetc(L,Z);
+ LoadBlock(L,b,size,Z);
+ b[size]=0;
+ return luaU_str2d(L,b,zname(Z));
 }
 
 static int LoadInt (lua_State* L, ZIO* Z, const char* message)
@@ -76,19 +67,15 @@ static int LoadInt (lua_State* L, ZIO* Z, const char* message)
  return i;
 }
 
-#define PAD     5                       /* two word operands plus opcode */
-
-static Byte* LoadCode (lua_State* L, ZIO* Z)
+static void LoadCode (lua_State* L, TProtoFunc* tf, ZIO* Z)
 {
  int size=LoadInt(L,Z,"code too long (%lu bytes) in %.255s");
- Byte* b=luaM_malloc(L,size+PAD);
- LoadBlock(L,b,size,Z);
- if (b[size-1]!=ENDCODE) luaL_verror(L,"bad code in %.255s",zname(Z));
- memset(b+size,ENDCODE,PAD);            /* pad code for safety */
- return b;
+ tf->code=luaM_newvector(L,size,Instruction);
+ LoadBlock(L,tf->code,size*sizeof(tf->code[0]),Z);
+ if (tf->code[size-1]!=ENDCODE) luaL_verror(L,"bad code in %.255s",zname(Z));
 }
 
-static TaggedString* LoadTString (lua_State* L, ZIO* Z)
+static TaggedString* LoadString (lua_State* L, ZIO* Z)
 {
  long size=LoadLong(L,Z);
  if (size==0)
@@ -97,7 +84,7 @@ static TaggedString* LoadTString (lua_State* L, ZIO* Z)
  {
   char* s=luaL_openspace(L,size);
   LoadBlock(L,s,size,Z);
-  return luaS_newlstr(L,s,size-1);
+  return luaS_newlstr(L,s,size-1);      /* remove trailing '\0' */
  }
 }
 
@@ -109,7 +96,7 @@ static void LoadLocals (lua_State* L, TProtoFunc* tf, ZIO* Z)
  for (i=0; i<n; i++)
  {
   tf->locvars[i].line=LoadInt(L,Z,"too many lines (%lu) in %.255s");
-  tf->locvars[i].varname=LoadTString(L,Z);
+  tf->locvars[i].varname=LoadString(L,Z);
  }
  tf->locvars[i].line=-1;                /* flag end of vector */
  tf->locvars[i].varname=NULL;
@@ -119,31 +106,27 @@ static TProtoFunc* LoadFunction (lua_State* L, ZIO* Z, int native);
 
 static void LoadConstants (lua_State* L, TProtoFunc* tf, ZIO* Z, int native)
 {
- int i,n=LoadInt(L,Z,"too many constants (%lu) in %.255s");
- tf->nconsts=n;
- if (n==0) return;
- tf->consts=luaM_newvector(L,n,TObject);
- for (i=0; i<n; i++)
+ int i,n;
+ tf->nkstr=n=LoadInt(L,Z,"too many strings (%lu) in %.255s");
+ if (n>0)
  {
-  TObject* o=tf->consts+i;
-  ttype(o)=-ezgetc(L,Z);                /* ttype(o) is negative - ORDER LUA_T */
-  switch (ttype(o))
-  {
-   case LUA_T_NUMBER:
-        nvalue(o)=LoadNumber(L,Z,native);
-        break;
-   case LUA_T_STRING:
-        tsvalue(o)=LoadTString(L,Z);
-        break;
-   case LUA_T_LPROTO:
-        tfvalue(o)=LoadFunction(L,Z,native);
-        break;
-   case LUA_T_NIL:
-        break;
-   default:                             /* cannot happen */
-        luaU_badconstant(L,"load",i,o,tf);
-        break;
-  }
+  tf->kstr=luaM_newvector(L,n,TaggedString*);
+  for (i=0; i<n; i++) tf->kstr[i]=LoadString(L,Z);
+ }
+ tf->nknum=n=LoadInt(L,Z,"too many numbers (%lu) in %.255s");
+ if (n>0)
+ {
+  tf->knum=luaM_newvector(L,n,real);
+  if (native)
+   LoadBlock(L,tf->knum,n*sizeof(tf->knum[0]),Z);
+  else
+   for (i=0; i<n; i++) tf->knum[i]=LoadNumber(L,Z);
+ }
+ tf->nkproto=n=LoadInt(L,Z,"too many functions (%lu) in %.255s");
+ if (n>0)
+ {
+  tf->kproto=luaM_newvector(L,n,TProtoFunc*);
+  for (i=0; i<n; i++) tf->kproto[i]=LoadFunction(L,Z,native);
  }
 }
 
@@ -151,9 +134,12 @@ static TProtoFunc* LoadFunction (lua_State* L, ZIO* Z, int native)
 {
  TProtoFunc* tf=luaF_newproto(L);
  tf->lineDefined=LoadInt(L,Z,"lineDefined too large (%lu) in %.255s");
- tf->source=LoadTString(L,Z);
+ tf->source=LoadString(L,Z);
  if (tf->source==NULL) tf->source=luaS_new(L,zname(Z));
- tf->code=LoadCode(L,Z);
+ tf->numparams=LoadInt(L,Z,"numparams too large (%lu) in %.255s");
+ tf->is_vararg=LoadInt(L,Z,"is_vararg too large (%lu) in %.255s");
+ tf->maxstacksize=LoadInt(L,Z,"maxstacksize too large (%lu) in %.255s");
+ LoadCode(L,tf,Z);
  LoadLocals(L,tf,Z);
  LoadConstants(L,tf,Z,native);
  return tf;
@@ -167,6 +153,8 @@ static void LoadSignature (lua_State* L, ZIO* Z)
  if (*s!=0) luaL_verror(L,"bad signature in %.255s",zname(Z));
 }
 
+#define V(v)    v/16,v%16
+
 static int LoadHeader (lua_State* L, ZIO* Z)
 {
  int version,sizeofR,native;
@@ -174,12 +162,12 @@ static int LoadHeader (lua_State* L, ZIO* Z)
  version=ezgetc(L,Z);
  if (version>VERSION)
   luaL_verror(L,
-        "%.255s too new: version=0x%02x; expected at most 0x%02x",
-        zname(Z),version,VERSION);
+        "%.255s too new: its version is %d.%d; expected at most %d.%d",
+        zname(Z),V(version),V(VERSION));
  if (version<VERSION0)                  /* check last major change */
   luaL_verror(L,
-        "%.255s too old: version=0x%02x; expected at least 0x%02x",
-        zname(Z),version,VERSION0);
+        "%.255s too old: its version is %d.%d; expected at least %d.%d",
+        zname(Z),V(version),V(VERSION));
  sizeofR=ezgetc(L,Z);
  native=(sizeofR!=0);
  if (native)                            /* test number representation */
@@ -189,9 +177,9 @@ static int LoadHeader (lua_State* L, ZIO* Z)
          zname(Z),sizeofR,(int)sizeof(real));
   else
   {
-   real tf=TEST_NUMBER;
-   real f=LoadNumber(L,Z,native);
-   if ((long)f!=(long)tf)
+   real f=0,tf=TEST_NUMBER;
+   LoadBlock(L,&f,sizeof(f),Z);
+   if ((long)f!=(long)tf)               /* disregard errors in last bit of fraction */
     luaL_verror(L,"unknown number format in %.255s: "
           "read " NUMBER_FMT "; expected " NUMBER_FMT,
           zname(Z),f,tf);
@@ -220,16 +208,6 @@ TProtoFunc* luaU_undump1 (lua_State* L, ZIO* Z)
 }
 
 /*
-* handle constants that cannot happen
-*/
-void luaU_badconstant (lua_State* L, const char* s, int i, const TObject* o, const TProtoFunc* tf)
-{
- int t=ttype(o);
- const char* name= (t>0 || t<LUA_T_LINE) ? "?" : luaO_typenames[-t];
- luaL_verror(L,"cannot %.255s constant #%d: type=%d [%s]" IN,s,i,t,name,INLOC);
-}
-
-/*
 * convert number from text
 */
 double luaU_str2d (lua_State* L, const char* b, const char* where)
diff --git a/lundump.h b/lundump.h
index d4f6f628..4c582ad5 100644
--- a/lundump.h
+++ b/lundump.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.17 1999/12/02 18:51:09 lhf Exp $
+** $Id: lundump.h,v 1.18 2000/01/28 17:51:09 lhf Exp $
 ** load pre-compiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -27,6 +27,7 @@ double luaU_str2d (lua_State* L, const char* b, const char* where);
 #define SIGNATURE       "Lua"           /* ...followed by this signature */
 
 /* formats for error messages */
+#define xSOURCE         "<%d:%.255s>"
 #define SOURCE          "<%.255s:%d>"
 #define IN              " in %p " SOURCE
 #define INLOC           tf,tf->source->str,tf->lineDefined
diff --git a/lvm.c b/lvm.c
index f88f0cd1..60a886c8 100644
--- a/lvm.c
+++ b/lvm.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.c,v 1.88 2000/02/22 13:31:30 roberto Exp roberto $
+** $Id: lvm.c,v 1.89 2000/02/22 18:12:46 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -30,8 +30,6 @@
 #endif
 
 
-#define highbyte(L, x)  ((x)<<8)
-
 
 /*
 ** Extra stack size to run a function:
@@ -106,7 +104,7 @@ void luaV_closure (lua_State *L, int nelems) {
 void luaV_gettable (lua_State *L, StkId top) {
   TObject *table = top-2;
   const TObject *im;
-  if (ttype(table) != LUA_T_ARRAY) {  /* not a table, get gettable method */
+  if (ttype(table) != LUA_T_ARRAY) {  /* not a table, get gettable TM */
     im = luaT_getimbyObj(L, table, IM_GETTABLE);
     if (ttype(im) == LUA_T_NIL) {
       L->top = top;
@@ -116,7 +114,7 @@ void luaV_gettable (lua_State *L, StkId top) {
   else {  /* object is a table... */
     int tg = table->value.a->htag;
     im = luaT_getim(L, tg, IM_GETTABLE);
-    if (ttype(im) == LUA_T_NIL) {  /* and does not have a `gettable' method */
+    if (ttype(im) == LUA_T_NIL) {  /* and does not have a `gettable' TM */
       const TObject *h = luaH_get(L, avalue(table), table+1);
       if (ttype(h) == LUA_T_NIL &&
           (ttype(im=luaT_getim(L, tg, IM_INDEX)) != LUA_T_NIL)) {
@@ -128,9 +126,9 @@ void luaV_gettable (lua_State *L, StkId top) {
         *table = *h;  /* `push' result into table position */
       return;
     }
-    /* else it has a `gettable' method, go through to next command */
+    /* else it has a `gettable' TM, go through to next command */
   }
-  /* object is not a table, or it has a `gettable' method */
+  /* object is not a table, or it has a `gettable' TM */
   L->top = top;
   luaD_callTM(L, im, 2, 1);
 }
@@ -261,7 +259,7 @@ int luaV_lessthan (lua_State *L, TObject *l, TObject *r) {
   else if (ttype(l) == LUA_T_STRING && ttype(r) == LUA_T_STRING)
     return (luaV_strcomp(tsvalue(l), tsvalue(r)) < 0);
   else {
-    /* update top and put arguments in correct order to call Tag Method */
+    /* update top and put arguments in correct order to call TM */
     if (l<r)  /* are arguments in correct order? */
       L->top = r+1;  /* yes; 2nd is on top */
     else {  /* no; exchange them */
@@ -562,7 +560,7 @@ StkId luaV_execute (lua_State *L, const Closure *cl, const TProtoFunc *tf,
           call_arith(L, top+1, IM_UNM);
         }
         else
-          nvalue(top-1) = - nvalue(top-1);
+          nvalue(top-1) = -nvalue(top-1);
         break;
 
       case NOTOP:
diff --git a/lvm.h b/lvm.h
index 14b83bb7..391d90ab 100644
--- a/lvm.h
+++ b/lvm.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 1.15 2000/01/24 20:14:07 roberto Exp roberto $
+** $Id: lvm.h,v 1.16 2000/02/22 18:12:46 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -13,8 +13,8 @@
 #include "ltm.h"
 
 
-#define tonumber(o) ((ttype(o) != LUA_T_NUMBER) && (luaV_tonumber(o) != 0))
-#define tostring(L, o) ((ttype(o) != LUA_T_STRING) && (luaV_tostring(L, o) != 0))
+#define tonumber(o)   ((ttype(o) != LUA_T_NUMBER) && (luaV_tonumber(o) != 0))
+#define tostring(L,o) ((ttype(o) != LUA_T_STRING) && (luaV_tostring(L, o) != 0))
 
 
 void luaV_pack (lua_State *L, StkId firstel, int nvararg, TObject *tab);
diff --git a/lzio.c b/lzio.c
index 48269ca7..7a05dba4 100644
--- a/lzio.c
+++ b/lzio.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.c,v 1.9 1999/11/09 17:59:35 roberto Exp roberto $
+** $Id: lzio.c,v 1.10 2000/02/08 16:39:42 roberto Exp roberto $
 ** a generic input stream interface
 ** See Copyright Notice in lua.h
 */
@@ -24,7 +24,7 @@ static int zmfilbuf (ZIO* z) {
 ZIO* zmopen (ZIO* z, const char* b, int size, const char *name) {
   if (b==NULL) return NULL;
   z->n = size;
-  z->p = (unsigned const char *)b;
+  z->p = (const unsigned char *)b;
   z->filbuf = zmfilbuf;
   z->u = NULL;
   z->name = name;
@@ -69,7 +69,7 @@ int zread (ZIO *z, void *b, int n) {
     if (z->n == 0) {
       if (z->filbuf(z) == EOZ)
         return n;  /* return number of missing bytes */
-      zungetc(z);  /* put result from 'filbuf' in the buffer */
+      zungetc(z);  /* put result from `filbuf' in the buffer */
     }
     m = (n <= z->n) ? n : z->n;  /* min. between n and z->n */
     memcpy(b, z->p, m);