last changes by lhf.

allocate new memory

bugs

@@ -170,3 +170,68 @@ in the following platforms:
 * IRIX	  - cc, cc-purify
 * Windows - Visual C++ (.c e .cpp, warning level=4)
 
+
+** lstrlib.c
+Tue May  2 15:27:58 EST 2000
+>> `strfind' gets wrong subject length when there is an offset
+(by Jon Kleiser; since 4.0a)
+
+** lparser.c
+Fri May 12 15:11:12 EST 2000
+>> first element in a list constructor is not adjusted to one value
+>> (e.g. «a = {gsub('a','a','')}»)
+(by Tomas; since 4.0a)
+
+** lparser.c
+Wed May 24 14:50:16 EST 2000
+>> record-constructor starting with an upvalue name gets an error
+>> (e.g. «local a; function f() x = {a=1} end»)
+(by Edgar Toernig; since 3.1)
+
+** lparser.c
+Tue Aug 29 15:56:05 EST 2000
+>> error message for `for' uses `while'
+(since 4.0a; already corrected)
+
+** lgc.c
+Tue Aug 29 15:57:41 EST 2000
+>> gc tag method for nil could call line hook
+(by ry; since ?)
+
+
+
+=================================================================
+--- Version 4.0 Beta
+
+** liolib.c
+Fri Sep 22 15:12:37 EST 2000
+>> `read("*w")' should return nil at EOF
+(by roberto; since 4.0b)
+
+** lvm.c
+Mon Sep 25 11:47:48 EST 2000
+>> lua_gettable does not get key from stack top
+(by Philip Yi; since 4.0b)
+
+** lgc.c
+Mon Sep 25 11:50:48 EST 2000
+>> GC may crash when checking locked C closures
+(by Philip Yi; since 4.0b)
+
+** lapi.c
+Wed Sep 27 09:50:19 EST 2000
+>> lua_tag should return LUA_NOTAG for non-valid indices
+(by Paul Hankin; since 4.0b)
+
+** llex.h / llex.c / lparser.c
+Wed Sep 27 13:39:45 EST 2000
+>> parser overwrites semantic information when looking ahead
+>> (e.g. «a = {print'foo'}»)
+(by Edgar Toernig; since 4.0b, deriving from previous bug)
+
+** liolib.c
+Thu Oct 26 10:50:46 EDT 2000
+>> in function `read_file', realloc() doesn't free the buffer if it can't
+>> allocate new memory
+(by Mauro Vezzosi; since 4.0b)
+

lapi.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 1.77 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: lapi.c,v 1.109 2000/10/26 12:47:05 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -7,21 +7,18 @@
 
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lapi.h"
-#include "lauxlib.h"
 #include "ldo.h"
 #include "lfunc.h"
 #include "lgc.h"
 #include "lmem.h"
 #include "lobject.h"
-#include "lref.h"
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
-#include "lua.h"
 #include "lvm.h"
 
 
@@ -30,364 +27,468 @@ const char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
 
 
 
-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);
+#define Index(L,i)	((i) >= 0 ? (L->Cbase+((i)-1)) : (L->top+(i)))
+
+#define api_incr_top(L)	incr_top
+
+
+
+
+TObject *luaA_index (lua_State *L, int index) {
+  return Index(L, index);
 }
 
 
-lua_Object luaA_putluaObject (lua_State *L, const TObject *o) {
-  luaD_openstack(L, L->Cstack.base);
-  *L->Cstack.base++ = *o;
-  return L->Cstack.base-1;
-}
-
-
-lua_Object luaA_putObjectOnTop (lua_State *L) {
-  luaD_openstack(L, L->Cstack.base);
-  *L->Cstack.base++ = *(--L->top);
-  return L->Cstack.base-1;
-}
-
-
-static void top2LC (lua_State *L, int n) {
-  /* Put the `n' elements on the top as the Lua2C contents */
-  L->Cstack.base = L->top;  /* new base */
-  L->Cstack.lua2C = L->Cstack.base-n;  /* position of the new results */
-  L->Cstack.num = n;  /* number of results */
-}
-
-
-lua_Object lua_pop (lua_State *L) {
-  luaA_checkCargs(L, 1);
-  return luaA_putObjectOnTop(L);
-}
-
-
-/*
-** Get a parameter, returning the object handle or LUA_NOOBJECT on error.
-** `number' must be 1 to get the first parameter.
-*/
-lua_Object lua_lua2C (lua_State *L, int number) {
-  if (number <= 0 || number > L->Cstack.num) return LUA_NOOBJECT;
-  return L->Cstack.lua2C+number-1;
-}
-
-
-int lua_callfunction (lua_State *L, lua_Object function) {
-  if (function == LUA_NOOBJECT)
-    return 1;
-  else {
-    luaD_openstack(L, L->Cstack.base);
-    *L->Cstack.base = *function;
-    return luaD_protectedrun(L);
+static TObject *luaA_indexAcceptable (lua_State *L, int index) {
+  if (index >= 0) {
+    TObject *o = L->Cbase+(index-1);
+    if (o >= L->top) return NULL;
+    else return o;
   }
+  else return L->top+index;
 }
 
 
-lua_Object lua_gettagmethod (lua_State *L, int tag, const char *event) {
-  return luaA_putluaObject(L, luaT_gettagmethod(L, tag, event));
-}
-
-
-lua_Object lua_settagmethod (lua_State *L, int tag, const char *event) {
-  TObject *method;
-  luaA_checkCargs(L, 1);
-  method = L->top-1;
-  if ((ttype(method) != TAG_NIL) && (*lua_type(L, method) != 'f'))
-    lua_error(L, "Lua API error - tag method must be a function or nil");
-  luaT_settagmethod(L, tag, event, method);
-  return luaA_putObjectOnTop(L);
-}
-
-
-lua_Object lua_gettable (lua_State *L) {
-  luaA_checkCargs(L, 2);
-  luaV_gettable(L, L->top--);
-  return luaA_putObjectOnTop(L);
-}
-
-
-lua_Object lua_rawgettable (lua_State *L) {
-  lua_Object res;
-  luaA_checkCargs(L, 2);
-  if (ttype(L->top-2) != TAG_TABLE)
-    lua_error(L, "indexed expression not a table in rawgettable");
-  res = luaA_putluaObject(L, luaH_get(L, avalue(L->top-2), L->top-1));
-  L->top -= 2;
-  return res;
-}
-
-
-void lua_settable (lua_State *L) {
-  StkId top;
-  luaA_checkCargs(L, 3);
-  top = L->top;
-  luaV_settable(L, top-3, top);
-  L->top = top-3;  /* pop table, index, and value */
-}
-
-
-void lua_rawsettable (lua_State *L) {
-  luaA_checkCargs(L, 3);
-  luaV_rawsettable(L, L->top-3);
-}
-
-
-lua_Object lua_createtable (lua_State *L) {
-  TObject o;
-  luaC_checkGC(L);
-  avalue(&o) = luaH_new(L, 0);
-  ttype(&o) = TAG_TABLE;
-  return luaA_putluaObject(L, &o);
-}
-
-
-lua_Object lua_getglobal (lua_State *L, const char *name) {
-  luaV_getglobal(L, luaS_assertglobalbyname(L, name), L->top++);
-  return luaA_putObjectOnTop(L);
-}
-
-
-lua_Object lua_rawgetglobal (lua_State *L, const char *name) {
-  GlobalVar *gv = luaS_assertglobalbyname(L, name);
-  return luaA_putluaObject(L, &gv->value);
-}
-
-
-void lua_setglobal (lua_State *L, const char *name) {
-  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_checkCargs(L, 1);
-  gv->value = *(--L->top);
-}
-
-
-const char *lua_type (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o == LUA_NOOBJECT) ? "NOOBJECT" : luaO_typename(o);
-}
-
-int lua_isnil (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT) && (ttype(o) == TAG_NIL);
-}
-
-int lua_istable (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT) && (ttype(o) == TAG_TABLE);
-}
-
-int lua_isuserdata (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT) && (ttype(o) == TAG_USERDATA);
-}
-
-int lua_iscfunction (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT) && (ttype(o) == TAG_CCLOSURE);
-}
-
-int lua_isnumber (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT) && (tonumber(o) == 0);
-}
-
-int lua_isstring (lua_State *L, lua_Object o) {
-  UNUSED(L);
-  return (o != LUA_NOOBJECT && (ttype(o) == TAG_STRING ||
-                                ttype(o) == TAG_NUMBER));
-}
-
-int lua_isfunction (lua_State *L, lua_Object o) {
-  return *lua_type(L, o) == 'f';
-}
-
-int lua_equal(lua_State *L, lua_Object o1, lua_Object o2) {
-  UNUSED(L);
-  if (o1 == LUA_NOOBJECT || o2 == LUA_NOOBJECT)
-    return (o1 == o2);
-  else return luaO_equalObj(o1, o2);
-}
-
-
-double lua_getnumber (lua_State *L, lua_Object obj) {
-  UNUSED(L);
-  if (obj == LUA_NOOBJECT  || tonumber(obj))
-     return 0.0;
-  else return (nvalue(obj));
-}
-
-const char *lua_getstring (lua_State *L, lua_Object obj) {
-  luaC_checkGC(L);  /* `tostring' may create a new string */
-  if (obj == LUA_NOOBJECT || tostring(L, obj))
-    return NULL;
-  else return (svalue(obj));
-}
-
-long lua_strlen (lua_State *L, lua_Object obj) {
-  if (obj == LUA_NOOBJECT || tostring(L, obj))
-    return 0L;
-  else return (tsvalue(obj)->u.s.len);
-}
-
-void *lua_getuserdata (lua_State *L, lua_Object obj) {
-  UNUSED(L);
-  if (obj == LUA_NOOBJECT || ttype(obj) != TAG_USERDATA)
-    return NULL;
-  else return tsvalue(obj)->u.d.value;
-}
-
-lua_CFunction lua_getcfunction (lua_State *L, lua_Object obj) {
-  if (!lua_iscfunction(L, obj))
-    return NULL;
-  else return clvalue(obj)->f.c;
-}
-
-
-void lua_pushnil (lua_State *L) {
-  ttype(L->top) = TAG_NIL;
-  incr_top;
-}
-
-void lua_pushnumber (lua_State *L, double n) {
-  ttype(L->top) = TAG_NUMBER;
-  nvalue(L->top) = n;
-  incr_top;
-}
-
-void lua_pushlstring (lua_State *L, const char *s, long len) {
-  tsvalue(L->top) = luaS_newlstr(L, s, len);
-  ttype(L->top) = TAG_STRING;
-  incr_top;
-  luaC_checkGC(L);
-}
-
-void lua_pushstring (lua_State *L, const char *s) {
-  if (s == NULL)
-    lua_pushnil(L);
-  else
-    lua_pushlstring(L, s, strlen(s));
-}
-
-void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
-  if (fn == NULL)
-    lua_error(L, "Lua API error - attempt to push a NULL Cfunction");
-  luaA_checkCargs(L, n);
-  luaV_Cclosure(L, fn, n);
-  luaC_checkGC(L);
-}
-
-void lua_pushusertag (lua_State *L, void *u, int tag) {  /* ORDER LUA_T */
-  if (tag != LUA_ANYTAG && tag != TAG_USERDATA && tag < NUM_TAGS)
-    luaL_verror(L, "invalid tag for a userdata (%d)", tag);
-  tsvalue(L->top) = luaS_createudata(L, u, tag);
-  ttype(L->top) = TAG_USERDATA;
-  incr_top;
-  luaC_checkGC(L);
-}
-
 void luaA_pushobject (lua_State *L, const TObject *o) {
   *L->top = *o;
   incr_top;
 }
 
-void lua_pushobject (lua_State *L, lua_Object o) {
-  if (o == LUA_NOOBJECT)
-    lua_error(L, "Lua API error - attempt to push a NOOBJECT");
-  *L->top = *o;
-  incr_top;
+LUA_API int lua_stackspace (lua_State *L) {
+  return (L->stack_last - L->top);
 }
 
 
-int lua_tag (lua_State *L, lua_Object o) {
-  if (o == LUA_NOOBJECT)
-    return TAG_NIL;
-  else if (ttype(o) == TAG_USERDATA)  /* to allow `old' tags (deprecated) */
-    return o->value.ts->u.d.tag;
+
+/*
+** basic stack manipulation
+*/
+
+
+LUA_API int lua_gettop (lua_State *L) {
+  return (L->top - L->Cbase);
+}
+
+
+LUA_API void lua_settop (lua_State *L, int index) {
+  if (index >= 0)
+    luaD_adjusttop(L, L->Cbase, index);
   else
-    return luaT_effectivetag(L, o);
+    L->top = L->top+index+1;  /* index is negative */
 }
 
 
-void lua_settag (lua_State *L, int tag) {
-  luaA_checkCargs(L, 1);
-  luaT_realtag(L, tag);
-  switch (ttype(L->top-1)) {
-    case TAG_TABLE:
-      (L->top-1)->value.a->htag = tag;
-      break;
-    case TAG_USERDATA:
-      (L->top-1)->value.ts->u.d.tag = tag;
-      break;
-    default:
-      luaL_verror(L, "cannot change the tag of a %.20s",
-                  luaO_typename(L->top-1));
-  }
+LUA_API void lua_remove (lua_State *L, int index) {
+  StkId p = luaA_index(L, index);
+  while (++p < L->top) *(p-1) = *p;
   L->top--;
 }
 
 
-GlobalVar *luaA_nextvar (lua_State *L, TString *ts) {
-  GlobalVar *gv;
-  if (ts == NULL)
-    gv = L->rootglobal;  /* first variable */
-  else {
-    /* check whether name is in global var list */
-    luaL_arg_check(L, ts->u.s.gv, 1, "variable name expected");
-    gv = ts->u.s.gv->next;  /* get next */
-  }
-  while (gv && gv->value.ttype == TAG_NIL)  /* skip globals with nil */
-    gv = gv->next;
-  if (gv) {
-    ttype(L->top) = TAG_STRING; tsvalue(L->top) = gv->name;
-    incr_top;
-    luaA_pushobject(L, &gv->value);
-  }
-  return gv;
+LUA_API void lua_insert (lua_State *L, int index) {
+  StkId p = luaA_index(L, index);
+  StkId q;
+  for (q = L->top; q>p; q--)
+    *q = *(q-1);
+  *p = *L->top;
 }
 
 
-const char *lua_nextvar (lua_State *L, const char *varname) {
-  TString *ts = (varname == NULL) ? NULL : luaS_new(L, varname);
-  GlobalVar *gv = luaA_nextvar(L, ts);
-  if (gv) {
-    top2LC(L, 2);
-    return gv->name->str;
-  }
-  else {
-    top2LC(L, 0);
-    return NULL;
+LUA_API void lua_pushvalue (lua_State *L, int index) {
+  *L->top = *luaA_index(L, index);
+  api_incr_top(L);
+}
+
+
+
+/*
+** access functions (stack -> C)
+*/
+
+
+LUA_API int lua_type (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL) ? LUA_TNONE : ttype(o);
+}
+
+LUA_API const char *lua_typename (lua_State *L, int t) {
+  UNUSED(L);
+  return (t == LUA_TNONE) ? "no value" : luaO_typenames[t];
+}
+
+
+LUA_API int lua_iscfunction (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL) ? 0 : iscfunction(o);
+}
+
+LUA_API int lua_isnumber (lua_State *L, int index) {
+  TObject *o = luaA_indexAcceptable(L, index);
+  return (o == NULL) ? 0 : (tonumber(o) == 0);
+}
+
+LUA_API int lua_isstring (lua_State *L, int index) {
+  int t = lua_type(L, index);
+  return (t == LUA_TSTRING || t == LUA_TNUMBER);
+}
+
+
+LUA_API int lua_tag (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL) ? LUA_NOTAG : luaT_tag(o);
+}
+
+LUA_API int lua_equal (lua_State *L, int index1, int index2) {
+  StkId o1 = luaA_indexAcceptable(L, index1);
+  StkId o2 = luaA_indexAcceptable(L, index2);
+  if (o1 == NULL || o2 == NULL) return 0;  /* index out-of-range */
+  else return luaO_equalObj(o1, o2);
+}
+
+LUA_API int lua_lessthan (lua_State *L, int index1, int index2) {
+  StkId o1 = luaA_indexAcceptable(L, index1);
+  StkId o2 = luaA_indexAcceptable(L, index2);
+  if (o1 == NULL || o2 == NULL) return 0;  /* index out-of-range */
+  else return luaV_lessthan(L, o1, o2, L->top);
+}
+
+
+
+LUA_API double lua_tonumber (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL || tonumber(o)) ? 0 : nvalue(o);
+}
+
+LUA_API const char *lua_tostring (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL || tostring(L, o)) ? NULL : svalue(o);
+}
+
+LUA_API size_t lua_strlen (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL || tostring(L, o)) ? 0 : tsvalue(o)->len;
+}
+
+LUA_API lua_CFunction lua_tocfunction (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL || !iscfunction(o)) ? NULL : clvalue(o)->f.c;
+}
+
+LUA_API void *lua_touserdata (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  return (o == NULL || ttype(o) != LUA_TUSERDATA) ? NULL :
+                                                    tsvalue(o)->u.d.value;
+}
+
+LUA_API const void *lua_topointer (lua_State *L, int index) {
+  StkId o = luaA_indexAcceptable(L, index);
+  if (o == NULL) return NULL;
+  switch (ttype(o)) {
+    case LUA_TTABLE: 
+      return hvalue(o);
+    case LUA_TFUNCTION:
+      return clvalue(o);
+    default: return NULL;
   }
 }
 
 
-int luaA_next (lua_State *L, const Hash *t, int i) {
-  int tsize = t->size;
-  for (; i<tsize; i++) {
-    Node *n = node(t, i);
-    if (ttype(val(n)) != TAG_NIL) {
-      luaA_pushobject(L, key(n));
-      luaA_pushobject(L, val(n));
-      return i+1;  /* index to be used next time */
+
+/*
+** push functions (C -> stack)
+*/
+
+
+LUA_API void lua_pushnil (lua_State *L) {
+  ttype(L->top) = LUA_TNIL;
+  api_incr_top(L);
+}
+
+
+LUA_API void lua_pushnumber (lua_State *L, double n) {
+  nvalue(L->top) = n;
+  ttype(L->top) = LUA_TNUMBER;
+  api_incr_top(L);
+}
+
+
+LUA_API void lua_pushlstring (lua_State *L, const char *s, size_t len) {
+  tsvalue(L->top) = luaS_newlstr(L, s, len);
+  ttype(L->top) = LUA_TSTRING;
+  api_incr_top(L);
+}
+
+
+LUA_API void lua_pushstring (lua_State *L, const char *s) {
+  if (s == NULL)
+    lua_pushnil(L);
+  else
+    lua_pushlstring(L, s, strlen(s));
+}
+
+
+LUA_API void lua_pushcclosure (lua_State *L, lua_CFunction fn, int n) {
+  luaV_Cclosure(L, fn, n);
+}
+
+
+LUA_API void lua_pushusertag (lua_State *L, void *u, int tag) {
+  /* ORDER LUA_T */
+  if (!(tag == LUA_ANYTAG || tag == LUA_TUSERDATA || validtag(tag)))
+    luaO_verror(L, "invalid tag for a userdata (%d)", tag);
+  tsvalue(L->top) = luaS_createudata(L, u, tag);
+  ttype(L->top) = LUA_TUSERDATA;
+  api_incr_top(L);
+}
+
+
+
+/*
+** get functions (Lua -> stack)
+*/
+
+
+LUA_API void lua_getglobal (lua_State *L, const char *name) {
+  StkId top = L->top;
+  *top = *luaV_getglobal(L, luaS_new(L, name));
+  L->top = top;
+  api_incr_top(L);
+}
+
+
+LUA_API void lua_gettable (lua_State *L, int index) {
+  StkId t = Index(L, index);
+  StkId top = L->top;
+  *(top-1) = *luaV_gettable(L, t);
+  L->top = top;  /* tag method may change top */
+}
+
+
+LUA_API void lua_rawget (lua_State *L, int index) {
+  StkId t = Index(L, index);
+  LUA_ASSERT(ttype(t) == LUA_TTABLE, "table expected");
+  *(L->top - 1) = *luaH_get(L, hvalue(t), L->top - 1);
+}
+
+
+LUA_API void lua_rawgeti (lua_State *L, int index, int n) {
+  StkId o = Index(L, index);
+  LUA_ASSERT(ttype(o) == LUA_TTABLE, "table expected");
+  *L->top = *luaH_getnum(hvalue(o), n);
+  api_incr_top(L);
+}
+
+
+LUA_API void lua_getglobals (lua_State *L) {
+  hvalue(L->top) = L->gt;
+  ttype(L->top) = LUA_TTABLE;
+  api_incr_top(L);
+}
+
+
+LUA_API int lua_getref (lua_State *L, int ref) {
+  if (ref == LUA_REFNIL)
+    ttype(L->top) = LUA_TNIL;
+  else if (0 <= ref && ref < L->refSize &&
+          (L->refArray[ref].st == LOCK || L->refArray[ref].st == HOLD))
+    *L->top = L->refArray[ref].o;
+  else
+    return 0;
+  api_incr_top(L);
+  return 1;
+}
+
+
+LUA_API void lua_newtable (lua_State *L) {
+  hvalue(L->top) = luaH_new(L, 0);
+  ttype(L->top) = LUA_TTABLE;
+  api_incr_top(L);
+}
+
+
+
+/*
+** set functions (stack -> Lua)
+*/
+
+
+LUA_API void lua_setglobal (lua_State *L, const char *name) {
+  StkId top = L->top;
+  luaV_setglobal(L, luaS_new(L, name));
+  L->top = top-1;  /* remove element from the top */
+}
+
+
+LUA_API void lua_settable (lua_State *L, int index) {
+  StkId t = Index(L, index);
+  StkId top = L->top;
+  luaV_settable(L, t, top-2);
+  L->top = top-2;  /* pop index and value */
+}
+
+
+LUA_API void lua_rawset (lua_State *L, int index) {
+  StkId t = Index(L, index);
+  LUA_ASSERT(ttype(t) == LUA_TTABLE, "table expected");
+  *luaH_set(L, hvalue(t), L->top-2) = *(L->top-1);
+  L->top -= 2;
+}
+
+
+LUA_API void lua_rawseti (lua_State *L, int index, int n) {
+  StkId o = Index(L, index);
+  LUA_ASSERT(ttype(o) == LUA_TTABLE, "table expected");
+  *luaH_setint(L, hvalue(o), n) = *(L->top-1);
+  L->top--;
+}
+
+
+LUA_API void lua_setglobals (lua_State *L) {
+  StkId newtable = --L->top;
+  LUA_ASSERT(ttype(newtable) == LUA_TTABLE, "table expected");
+  L->gt = hvalue(newtable);
+}
+
+
+LUA_API int lua_ref (lua_State *L,  int lock) {
+  int ref;
+  if (ttype(L->top-1) == LUA_TNIL)
+    ref = LUA_REFNIL;
+  else {
+    if (L->refFree != NONEXT) {  /* is there a free place? */
+      ref = L->refFree;
+      L->refFree = L->refArray[ref].st;
     }
+    else {  /* no more free places */
+      luaM_growvector(L, L->refArray, L->refSize, 1, struct Ref,
+                      "reference table overflow", MAX_INT);
+      L->nblocks += sizeof(struct Ref);
+      ref = L->refSize++;
+    }
+    L->refArray[ref].o = *(L->top-1);
+    L->refArray[ref].st = lock ? LOCK : HOLD;
   }
-  return 0;  /* no more elements */
+  L->top--;
+  return ref;
 }
 
 
-int lua_next (lua_State *L, lua_Object t, int i) {
-  if (ttype(t) != TAG_TABLE)
-    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;
+/*
+** "do" functions (run Lua code)
+** (most of them are in ldo.c)
+*/
+
+LUA_API void lua_rawcall (lua_State *L, int nargs, int nresults) {
+  luaD_call(L, L->top-(nargs+1), nresults);
 }
 
 
+/*
+** Garbage-collection functions
+*/
+
+/* GC values are expressed in Kbytes: #bytes/2^10 */
+#define GCscale(x)		((int)((x)>>10))
+#define GCunscale(x)		((unsigned long)(x)<<10)
+
+LUA_API int lua_getgcthreshold (lua_State *L) {
+  return GCscale(L->GCthreshold);
+}
+
+LUA_API int lua_getgccount (lua_State *L) {
+  return GCscale(L->nblocks);
+}
+
+LUA_API void lua_setgcthreshold (lua_State *L, int newthreshold) {
+  if (newthreshold > GCscale(ULONG_MAX))
+    L->GCthreshold = ULONG_MAX;
+  else
+    L->GCthreshold = GCunscale(newthreshold);
+  luaC_checkGC(L);
+}
+
+
+/*
+** miscellaneous functions
+*/
+
+LUA_API void lua_settag (lua_State *L, int tag) {
+  luaT_realtag(L, tag);
+  switch (ttype(L->top-1)) {
+    case LUA_TTABLE:
+      hvalue(L->top-1)->htag = tag;
+      break;
+    case LUA_TUSERDATA:
+      tsvalue(L->top-1)->u.d.tag = tag;
+      break;
+    default:
+      luaO_verror(L, "cannot change the tag of a %.20s",
+                  luaO_typename(L->top-1));
+  }
+}
+
+
+LUA_API void lua_unref (lua_State *L, int ref) {
+  if (ref >= 0) {
+    LUA_ASSERT(ref < L->refSize && L->refArray[ref].st < 0, "invalid ref");
+    L->refArray[ref].st = L->refFree;
+    L->refFree = ref;
+  }
+}
+
+
+LUA_API int lua_next (lua_State *L, int index) {
+  StkId t = luaA_index(L, index);
+  Node *n;
+  LUA_ASSERT(ttype(t) == LUA_TTABLE, "table expected");
+  n = luaH_next(L, hvalue(t), luaA_index(L, -1));
+  if (n) {
+    *(L->top-1) = *key(n);
+    *L->top = *val(n);
+    api_incr_top(L);
+    return 1;
+  }
+  else {  /* no more elements */
+    L->top -= 1;  /* remove key */
+    return 0;
+  }
+}
+
+
+LUA_API int lua_getn (lua_State *L, int index) {
+  Hash *h = hvalue(luaA_index(L, index));
+  const TObject *value = luaH_getstr(h, luaS_new(L, "n"));  /* value = h.n */
+  if (ttype(value) == LUA_TNUMBER)
+    return (int)nvalue(value);
+  else {
+    Number max = 0;
+    int i = h->size;
+    Node *n = h->node;
+    while (i--) {
+      if (ttype(key(n)) == LUA_TNUMBER &&
+          ttype(val(n)) != LUA_TNIL &&
+          nvalue(key(n)) > max)
+        max = nvalue(key(n));
+      n++;
+    }
+    return (int)max;
+  }
+}
+
+
+LUA_API void lua_concat (lua_State *L, int n) {
+  StkId top = L->top;
+  luaV_strconc(L, n, top);
+  L->top = top-(n-1);
+  luaC_checkGC(L);
+}
+
+
+LUA_API void *lua_newuserdata (lua_State *L, size_t size) {
+  TString *ts = luaS_newudata(L, size, NULL);
+  tsvalue(L->top) = ts;
+  ttype(L->top) = LUA_TUSERDATA;
+  api_incr_top(L);
+  return ts->u.d.value;
+}
+

lapi.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h,v 1.15 2000/03/10 18:37:44 roberto Exp roberto $
+** $Id: lapi.h,v 1.19 2000/08/28 17:57:04 roberto Exp roberto $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */
@@ -11,11 +11,7 @@
 #include "lobject.h"
 
 
-void luaA_checkCargs (lua_State *L, int nargs);
+TObject *luaA_index (lua_State *L, int index);
 void luaA_pushobject (lua_State *L, const TObject *o);
-GlobalVar *luaA_nextvar (lua_State *L, TString *g);
-int luaA_next (lua_State *L, const Hash *t, int i);
-lua_Object luaA_putluaObject (lua_State *L, const TObject *o);
-lua_Object luaA_putObjectOnTop (lua_State *L);
 
 #endif

lauxlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.26 2000/02/08 16:34:31 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.42 2000/10/30 12:38:50 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -14,15 +14,14 @@
 ** With care, these functions can be used by other libraries.
 */
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lauxlib.h"
-#include "lua.h"
 #include "luadebug.h"
 
 
 
-int luaL_findstring (const char *name, const char *const list[]) {
+LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {
   int i;
   for (i=0; list[i]; i++)
     if (strcmp(list[i], name) == 0)
@@ -30,11 +29,10 @@ int luaL_findstring (const char *name, const char *const list[]) {
   return -1;  /* name not found */
 }
 
-void luaL_argerror (lua_State *L, int narg, const char *extramsg) {
+LUALIB_API void luaL_argerror (lua_State *L, int narg, const char *extramsg) {
   lua_Debug ar;
   lua_getstack(L, 0, &ar);
-  lua_getinfo(L, "nu", &ar);
-  narg -= ar.nups;
+  lua_getinfo(L, "n", &ar);
   if (ar.name == NULL)
     ar.name = "?";
   luaL_verror(L, "bad argument #%d to `%.50s' (%.100s)",
@@ -42,78 +40,72 @@ void luaL_argerror (lua_State *L, int narg, const char *extramsg) {
 }
 
 
-static void type_error (lua_State *L, int narg, const char *type_name,
-                        lua_Object o) {
-  char buff[100];
-  const char *otype = (o == LUA_NOOBJECT) ? "no value" : lua_type(L, o);
-  sprintf(buff, "%.10s expected, got %.10s", type_name, otype);
+static void type_error (lua_State *L, int narg, int t) {
+  char buff[50];
+  sprintf(buff, "%.8s expected, got %.8s", lua_typename(L, t),
+                                           lua_typename(L, lua_type(L, narg)));
   luaL_argerror(L, narg, buff);
 }
 
 
-static const char *checkstr (lua_State *L, lua_Object o, int narg, long *len) {
-  const char *s = lua_getstring(L, o);
-  if (!s) type_error(L, narg, "string", o);
-  if (len) *len = lua_strlen(L, o);
+LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *mes) {
+  if (space > lua_stackspace(L))
+    luaL_verror(L, "stack overflow (%.30s)", mes);
+}
+
+
+LUALIB_API void luaL_checktype(lua_State *L, int narg, int t) {
+  if (lua_type(L, narg) != t)
+    type_error(L, narg, t);
+}
+
+
+LUALIB_API void luaL_checkany (lua_State *L, int narg) {
+  if (lua_type(L, narg) == LUA_TNONE)
+    luaL_argerror(L, narg, "value expected");
+}
+
+
+LUALIB_API const char *luaL_check_lstr (lua_State *L, int narg, size_t *len) {
+  const char *s = lua_tostring(L, narg);
+  if (!s) type_error(L, narg, LUA_TSTRING);
+  if (len) *len = lua_strlen(L, narg);
   return s;
 }
 
-const char *luaL_check_lstr (lua_State *L, int narg, long *len) {
-  return checkstr(L, lua_getparam(L, narg), narg, len);
-}
 
-const char *luaL_opt_lstr (lua_State *L, int narg, const char *def, long *len) {
-  lua_Object o = lua_getparam(L, narg);
-  if (o == LUA_NOOBJECT) {
-    if (len) *len = def ? strlen(def) : 0;
+LUALIB_API const char *luaL_opt_lstr (lua_State *L, int narg, const char *def, size_t *len) {
+  if (lua_isnull(L, narg)) {
+    if (len)
+      *len = (def ? strlen(def) : 0);
     return def;
   }
-  else return checkstr(L, o, narg, len);
-}
-
-double luaL_check_number (lua_State *L, int narg) {
-  lua_Object o = lua_getparam(L, narg);
-  if (!lua_isnumber(L, o)) type_error(L, narg, "number", o);
-  return lua_getnumber(L, o);
+  else return luaL_check_lstr(L, narg, len);
 }
 
 
-double luaL_opt_number (lua_State *L, int narg, double def) {
-  lua_Object o = lua_getparam(L, narg);
-  if (o == LUA_NOOBJECT) return def;
-  else {
-    if (!lua_isnumber(L, o)) type_error(L, narg, "number", o);
-    return lua_getnumber(L, o);
-  }
+LUALIB_API double luaL_check_number (lua_State *L, int narg) {
+  double d = lua_tonumber(L, narg);
+  if (d == 0 && !lua_isnumber(L, narg))  /* avoid extra test when d is not 0 */
+    type_error(L, narg, LUA_TNUMBER);
+  return d;
 }
 
 
-lua_Object luaL_tablearg (lua_State *L, int narg) {
-  lua_Object o = lua_getparam(L, narg);
-  if (!lua_istable(L, o)) type_error(L, narg, "table", o);
-  return o;
+LUALIB_API double luaL_opt_number (lua_State *L, int narg, double def) {
+  if (lua_isnull(L, narg)) return def;
+  else return luaL_check_number(L, narg);
 }
 
-lua_Object luaL_functionarg (lua_State *L, int narg) {
-  lua_Object o = lua_getparam(L, narg);
-  if (!lua_isfunction(L, o)) type_error(L, narg, "function", o);
-  return o;
-}
 
-lua_Object luaL_nonnullarg (lua_State *L, int narg) {
-  lua_Object o = lua_getparam(L, narg);
-  luaL_arg_check(L, o != LUA_NOOBJECT, narg, "value expected");
-  return o;
-}
-
-void luaL_openlib (lua_State *L, const struct luaL_reg *l, int n) {
+LUALIB_API void luaL_openlib (lua_State *L, const struct luaL_reg *l, int n) {
   int i;
   for (i=0; i<n; i++)
     lua_register(L, l[i].name, l[i].func);
 }
 
 
-void luaL_verror (lua_State *L, const char *fmt, ...) {
+LUALIB_API void luaL_verror (lua_State *L, const char *fmt, ...) {
   char buff[500];
   va_list argp;
   va_start(argp, fmt);
@@ -123,29 +115,102 @@ void luaL_verror (lua_State *L, const char *fmt, ...) {
 }
 
 
-#define EXTRALEN	sizeof("string \"...\"0")
+/*
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
+*/
 
-void luaL_chunkid (char *out, const char *source, int len) {
-  if (*source == '(') {
-    strncpy(out, source+1, len-1);  /* remove first char */
-    out[len-1] = '\0';  /* make sure `out' has an end */
-    out[strlen(out)-1] = '\0';  /* remove last char */
-  }
+
+#define buffempty(B)	((B)->p == (B)->buffer)
+#define bufflen(B)	((B)->p - (B)->buffer)
+#define bufffree(B)	((size_t)(LUAL_BUFFERSIZE - bufflen(B)))
+
+#define LIMIT	(LUA_MINSTACK/2)
+
+
+static int emptybuffer (luaL_Buffer *B) {
+  size_t l = bufflen(B);
+  if (l == 0) return 0;  /* put nothing on stack */
   else {
-    len -= EXTRALEN;
-    if (*source == '@')
-      sprintf(out, "file `%.*s'", len, source+1);
-    else {
-      const char *b = strchr(source , '\n');  /* stop at first new line */
-      int lim = (b && (b-source)<len) ? b-source : len;
-      sprintf(out, "string \"%.*s\"", lim, source);
-      strcpy(out+lim+(EXTRALEN-sizeof("...\"0")), "...\"");
+    lua_pushlstring(B->L, B->buffer, l);
+    B->p = B->buffer;
+    B->level++;
+    return 1;
+  }
+}
+
+
+static void adjuststack (luaL_Buffer *B) {
+  if (B->level > 1) {
+    lua_State *L = B->L;
+    int toget = 1;  /* number of levels to concat */
+    size_t toplen = lua_strlen(L, -1);
+    do {
+      size_t l = lua_strlen(L, -(toget+1));
+      if (B->level - toget + 1 >= LIMIT || toplen > l) {
+        toplen += l;
+        toget++;
+      }
+      else break;
+    } while (toget < B->level);
+    if (toget >= 2) {
+      lua_concat(L, toget);
+      B->level = B->level - toget + 1;
     }
   }
 }
 
 
-void luaL_filesource (char *out, const char *filename, int len) {
-  if (filename == NULL) filename = "(stdin)";
-  sprintf(out, "@%.*s", len-2, filename);  /* -2 for '@' and '\0' */
+LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B) {
+  if (emptybuffer(B))
+    adjuststack(B);
+  return B->buffer;
 }
+
+
+LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l) {
+  while (l--)
+    luaL_putchar(B, *s++);
+}
+
+
+LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s) {
+  luaL_addlstring(B, s, strlen(s));
+}
+
+
+LUALIB_API void luaL_pushresult (luaL_Buffer *B) {
+  emptybuffer(B);
+  if (B->level == 0)
+    lua_pushlstring(B->L, NULL, 0);
+  else if (B->level > 1)
+    lua_concat(B->L, B->level);
+  B->level = 1;
+}
+
+
+LUALIB_API void luaL_addvalue (luaL_Buffer *B) {
+  lua_State *L = B->L;
+  size_t vl = lua_strlen(L, -1);
+  if (vl <= bufffree(B)) {  /* fit into buffer? */
+    memcpy(B->p, lua_tostring(L, -1), vl);  /* put it there */
+    B->p += vl;
+    lua_pop(L, 1);  /* remove from stack */
+  }
+  else {
+    if (emptybuffer(B))
+      lua_insert(L, -2);  /* put buffer before new value */
+    B->level++;  /* add new value into B stack */
+    adjuststack(B);
+  }
+}
+
+
+LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
+  B->L = L;
+  B->p = B->buffer;
+  B->level = 0;
+}
+
+/* }====================================================== */

lauxlib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.h,v 1.16 1999/12/03 11:26:23 roberto Exp roberto $
+** $Id: lauxlib.h,v 1.29 2000/10/27 16:15:53 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -9,39 +9,38 @@
 #define lauxlib_h
 
 
+#include <stddef.h>
+#include <stdio.h>
+
 #include "lua.h"
 
 
+#ifndef LUALIB_API
+#define LUALIB_API	extern
+#endif
+
+
 struct luaL_reg {
   const char *name;
   lua_CFunction func;
 };
 
 
-void luaL_openlib (lua_State *L, const struct luaL_reg *l, int n);
-void luaL_argerror (lua_State *L, int numarg, const char *extramsg);
-const char *luaL_check_lstr (lua_State *L, int numArg, long *len);
-const char *luaL_opt_lstr (lua_State *L, int numArg, const char *def, long *len);
-double luaL_check_number (lua_State *L, int numArg);
-double luaL_opt_number (lua_State *L, int numArg, double def);
-lua_Object luaL_functionarg (lua_State *L, int arg);
-lua_Object luaL_tablearg (lua_State *L, int arg);
-lua_Object luaL_nonnullarg (lua_State *L, int numArg);
-void luaL_verror (lua_State *L, const char *fmt, ...);
-char *luaL_openspace (lua_State *L, int size);
-void luaL_resetbuffer (lua_State *L);
-void luaL_addchar (lua_State *L, int c);
-int luaL_getsize (lua_State *L);
-void luaL_addsize (lua_State *L, int n);
-int luaL_newbuffer (lua_State *L, int size);
-void luaL_oldbuffer (lua_State *L, int old);
-char *luaL_buffer (lua_State *L);
-int luaL_findstring (const char *name, const char *const list[]);
-void luaL_chunkid (char *out, const char *source, int len);
-void luaL_filesource (char *out, const char *filename, int len);
+LUALIB_API void luaL_openlib (lua_State *L, const struct luaL_reg *l, int n);
+LUALIB_API void luaL_argerror (lua_State *L, int numarg, const char *extramsg);
+LUALIB_API const char *luaL_check_lstr (lua_State *L, int numArg, size_t *len);
+LUALIB_API const char *luaL_opt_lstr (lua_State *L, int numArg, const char *def, size_t *len);
+LUALIB_API double luaL_check_number (lua_State *L, int numArg);
+LUALIB_API double luaL_opt_number (lua_State *L, int numArg, double def);
+
+LUALIB_API void luaL_checkstack (lua_State *L, int space, const char *msg);
+LUALIB_API void luaL_checktype (lua_State *L, int narg, int t);
+LUALIB_API void luaL_checkany (lua_State *L, int narg);
+
+LUALIB_API void luaL_verror (lua_State *L, const char *fmt, ...);
+LUALIB_API int luaL_findstring (const char *name, const char *const list[]);
 
 
-#ifdef LUA_REENTRANT
 
 /*
 ** ===============================================================
@@ -59,47 +58,43 @@ void luaL_filesource (char *out, const char *filename, int len);
 #define luaL_opt_long(L,n,d)	((long)luaL_opt_number(L, n,d))
 #define luaL_openl(L,a)		luaL_openlib(L, a, (sizeof(a)/sizeof(a[0])))
 
-#else
-
 
 /*
-** ===============================================================
-** Macros for single-state use
-** ===============================================================
+** {======================================================
+** Generic Buffer manipulation
+** =======================================================
 */
 
-#define luaL_arg_check(cond,numarg,extramsg) if (!(cond)) \
-                                               luaL_argerror(numarg,extramsg)
-#define luaL_check_string(n)	(luaL_check_lstr((n), NULL))
-#define luaL_opt_string(n, d)	(luaL_opt_lstr((n), (d), NULL))
-#define luaL_check_int(n)	((int)luaL_check_number(n))
-#define luaL_check_long(n)	((long)luaL_check_number(n))
-#define luaL_opt_int(n,d)	((int)luaL_opt_number(n,d))
-#define luaL_opt_long(n,d)	((long)luaL_opt_number(n,d))
-#define luaL_openl(a)		luaL_openlib(a, (sizeof(a)/sizeof(a[0])))
+
+#ifndef LUAL_BUFFERSIZE
+#define LUAL_BUFFERSIZE	  BUFSIZ
+#endif
 
 
-#define luaL_openlib(l,n)	(luaL_openlib)(lua_state,l,n)
-#define luaL_argerror(numarg,extramsg)	\
-				(luaL_argerror)(lua_state,numarg,extramsg)
-#define luaL_check_lstr(numArg,len)	(luaL_check_lstr)(lua_state,numArg,len)
-#define luaL_opt_lstr(numArg,def,len)	\
-				(luaL_opt_lstr)(lua_state,numArg,def,len)
-#define luaL_check_number(numArg)	(luaL_check_number)(lua_state,numArg)
-#define luaL_opt_number(numArg,def)	(luaL_opt_number)(lua_state,numArg,def)
-#define luaL_functionarg(arg)	(luaL_functionarg)(lua_state,arg)
-#define luaL_tablearg(arg)	(luaL_tablearg)(lua_state,arg)
-#define luaL_nonnullarg(numArg)	(luaL_nonnullarg)(lua_state,numArg)
-#define luaL_openspace(size)	(luaL_openspace)(lua_state,size)
-#define luaL_resetbuffer()	(luaL_resetbuffer)(lua_state)
-#define luaL_addchar(c)		(luaL_addchar)(lua_state,c)
-#define luaL_getsize()		(luaL_getsize)(lua_state)
-#define luaL_addsize(n)		(luaL_addsize)(lua_state,n)
-#define luaL_newbuffer(size)	(luaL_newbuffer)(lua_state,size)
-#define luaL_oldbuffer(old)	(luaL_oldbuffer)(lua_state,old)
-#define luaL_buffer()		(luaL_buffer)(lua_state)
+typedef struct luaL_Buffer {
+  char *p;			/* current position in buffer */
+  int level;
+  lua_State *L;
+  char buffer[LUAL_BUFFERSIZE];
+} luaL_Buffer;
+
+#define luaL_putchar(B,c) \
+  ((void)((B)->p < &(B)->buffer[LUAL_BUFFERSIZE] || luaL_prepbuffer(B)), \
+   (*(B)->p++ = (char)(c)))
+
+#define luaL_addsize(B,n)	((B)->p += (n))
+
+LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B);
+LUALIB_API char *luaL_prepbuffer (luaL_Buffer *B);
+LUALIB_API void luaL_addlstring (luaL_Buffer *B, const char *s, size_t l);
+LUALIB_API void luaL_addstring (luaL_Buffer *B, const char *s);
+LUALIB_API void luaL_addvalue (luaL_Buffer *B);
+LUALIB_API void luaL_pushresult (luaL_Buffer *B);
+
+
+/* }====================================================== */
+
 
 #endif
 
-#endif
 

lbaselib.c

@@ -0,0 +1,651 @@
+/*
+** $Id: lbaselib.c,v 1.16 2000/10/31 13:10:24 roberto Exp roberto $
+** Basic library
+** See Copyright Notice in lua.h
+*/
+
+
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lua.h"
+
+#include "lauxlib.h"
+#include "luadebug.h"
+#include "lualib.h"
+
+
+
+/*
+** If your system does not support `stderr', redefine this function, or
+** redefine _ERRORMESSAGE so that it won't need _ALERT.
+*/
+static int luaB__ALERT (lua_State *L) {
+  fputs(luaL_check_string(L, 1), stderr);
+  return 0;
+}
+
+
+/*
+** Basic implementation of _ERRORMESSAGE.
+** The library `liolib' redefines _ERRORMESSAGE for better error information.
+*/
+static int luaB__ERRORMESSAGE (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TSTRING);
+  lua_getglobal(L, LUA_ALERT);
+  if (lua_isfunction(L, -1)) {  /* avoid error loop if _ALERT is not defined */
+    lua_Debug ar;
+    lua_pushstring(L, "error: ");
+    lua_pushvalue(L, 1);
+    if (lua_getstack(L, 1, &ar)) {
+      lua_getinfo(L, "Sl", &ar);
+      if (ar.source && ar.currentline > 0) {
+        char buff[100];
+        sprintf(buff, "\n  <%.70s: line %d>", ar.short_src, ar.currentline);
+        lua_pushstring(L, buff);
+        lua_concat(L, 2);
+      }
+    }
+    lua_pushstring(L, "\n");
+    lua_concat(L, 3);
+    lua_rawcall(L, 1, 0);
+  }
+  return 0;
+}
+
+
+/*
+** If your system does not support `stdout', you can just remove this function.
+** If you need, you can define your own `print' function, following this
+** model but changing `fputs' to put the strings at a proper place
+** (a console window or a log file, for instance).
+*/
+static int luaB_print (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  lua_getglobal(L, "tostring");
+  for (i=1; i<=n; i++) {
+    const char *s;
+    lua_pushvalue(L, -1);  /* function to be called */
+    lua_pushvalue(L, i);   /* value to print */
+    lua_rawcall(L, 1, 1);
+    s = lua_tostring(L, -1);  /* get result */
+    if (s == NULL)
+      lua_error(L, "`tostring' must return a string to `print'");
+    if (i>1) fputs("\t", stdout);
+    fputs(s, stdout);
+    lua_pop(L, 1);  /* pop result */
+  }
+  fputs("\n", stdout);
+  return 0;
+}
+
+
+static int luaB_tonumber (lua_State *L) {
+  int base = luaL_opt_int(L, 2, 10);
+  if (base == 10) {  /* standard conversion */
+    luaL_checkany(L, 1);
+    if (lua_isnumber(L, 1)) {
+      lua_pushnumber(L, lua_tonumber(L, 1));
+      return 1;
+    }
+  }
+  else {
+    const char *s1 = luaL_check_string(L, 1);
+    char *s2;
+    unsigned long n;
+    luaL_arg_check(L, 2 <= base && base <= 36, 2, "base out of range");
+    n = strtoul(s1, &s2, base);
+    if (s1 != s2) {  /* at least one valid digit? */
+      while (isspace((unsigned char)*s2)) s2++;  /* skip trailing spaces */
+      if (*s2 == '\0') {  /* no invalid trailing characters? */
+        lua_pushnumber(L, n);
+        return 1;
+      }
+    }
+  }
+  lua_pushnil(L);  /* else not a number */
+  return 1;
+}
+
+
+static int luaB_error (lua_State *L) {
+  lua_error(L, luaL_opt_string(L, 1, NULL));
+  return 0;  /* to avoid warnings */
+}
+
+static int luaB_setglobal (lua_State *L) {
+  luaL_checkany(L, 2);
+  lua_setglobal(L, luaL_check_string(L, 1));
+  return 0;
+}
+
+static int luaB_getglobal (lua_State *L) {
+  lua_getglobal(L, luaL_check_string(L, 1));
+  return 1;
+}
+
+static int luaB_tag (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushnumber(L, lua_tag(L, 1));
+  return 1;
+}
+
+static int luaB_settag (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushvalue(L, 1);  /* push table */
+  lua_settag(L, luaL_check_int(L, 2));
+  return 1;  /* return table */
+}
+
+static int luaB_newtag (lua_State *L) {
+  lua_pushnumber(L, lua_newtag(L));
+  return 1;
+}
+
+static int luaB_copytagmethods (lua_State *L) {
+  lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
+                                          luaL_check_int(L, 2)));
+  return 1;
+}
+
+static int luaB_globals (lua_State *L) {
+  lua_getglobals(L);  /* value to be returned */
+  if (!lua_isnull(L, 1)) {
+    luaL_checktype(L, 1, LUA_TTABLE);
+    lua_pushvalue(L, 1);  /* new table of globals */
+    lua_setglobals(L);
+  }
+  return 1;
+}
+
+static int luaB_rawget (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  lua_rawget(L, -2);
+  return 1;
+}
+
+static int luaB_rawset (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checkany(L, 2);
+  luaL_checkany(L, 3);
+  lua_rawset(L, -3);
+  return 1;
+}
+
+static int luaB_settagmethod (lua_State *L) {
+  int tag = luaL_check_int(L, 1);
+  const char *event = luaL_check_string(L, 2);
+  luaL_arg_check(L, lua_isfunction(L, 3) || lua_isnil(L, 3), 3,
+                 "function or nil expected");
+  if (strcmp(event, "gc") == 0)
+    lua_error(L, "deprecated use: cannot set the `gc' tag method from Lua");
+  lua_gettagmethod(L, tag, event);
+  lua_pushvalue(L, 3);
+  lua_settagmethod(L, tag, event);
+  return 1;
+}
+
+
+static int luaB_gettagmethod (lua_State *L) {
+  int tag = luaL_check_int(L, 1);
+  const char *event = luaL_check_string(L, 2);
+  if (strcmp(event, "gc") == 0)
+    lua_error(L, "deprecated use: cannot get the `gc' tag method from Lua");
+  lua_gettagmethod(L, tag, event);
+  return 1;
+}
+
+
+static int luaB_gcinfo (lua_State *L) {
+  lua_pushnumber(L, lua_getgccount(L));
+  lua_pushnumber(L, lua_getgcthreshold(L));
+  return 2;
+}
+
+
+static int luaB_collectgarbage (lua_State *L) {
+  lua_setgcthreshold(L, luaL_opt_int(L, 1, 0));
+  return 0;
+}
+
+
+static int luaB_type (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushstring(L, lua_typename(L, lua_type(L, 1)));
+  return 1;
+}
+
+
+static int luaB_next (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_settop(L, 2);  /* create a 2nd argument if there isn't one */
+  if (lua_next(L, 1))
+    return 2;
+  else {
+    lua_pushnil(L);
+    return 1;
+  }
+}
+
+
+static int passresults (lua_State *L, int status, int oldtop) {
+  static const char *const errornames[] =
+    {"ok", "run-time error", "file error", "syntax error",
+     "memory error", "error in error handling"};
+  if (status == 0) {
+    int nresults = lua_gettop(L) - oldtop;
+    if (nresults > 0)
+      return nresults;  /* results are already on the stack */
+    else {
+      lua_pushuserdata(L, NULL);  /* at least one result to signal no errors */
+      return 1;
+    }
+  }
+  else {  /* error */
+    lua_pushnil(L);
+    lua_pushstring(L, errornames[status]);  /* error code */
+    return 2;
+  }
+}
+
+static int luaB_dostring (lua_State *L) {
+  int oldtop = lua_gettop(L);
+  size_t l;
+  const char *s = luaL_check_lstr(L, 1, &l);
+  if (*s == '\27')  /* binary files start with ESC... */
+    lua_error(L, "`dostring' cannot run pre-compiled code");
+  return passresults(L, lua_dobuffer(L, s, l, luaL_opt_string(L, 2, s)), oldtop);
+}
+
+
+static int luaB_dofile (lua_State *L) {
+  int oldtop = lua_gettop(L);
+  const char *fname = luaL_opt_string(L, 1, NULL);
+  return passresults(L, lua_dofile(L, fname), oldtop);
+}
+
+
+static int luaB_call (lua_State *L) {
+  int oldtop;
+  const char *options = luaL_opt_string(L, 3, "");
+  int err = 0;  /* index of old error method */
+  int i, status;
+  int n;
+  luaL_checktype(L, 2, LUA_TTABLE);
+  n = lua_getn(L, 2);
+  if (!lua_isnull(L, 4)) {  /* set new error method */
+    lua_getglobal(L, LUA_ERRORMESSAGE);
+    err = lua_gettop(L);  /* get index */
+    lua_pushvalue(L, 4);
+    lua_setglobal(L, LUA_ERRORMESSAGE);
+  }
+  oldtop = lua_gettop(L);  /* top before function-call preparation */
+  /* push function */
+  lua_pushvalue(L, 1);
+  luaL_checkstack(L, n, "too many arguments");
+  for (i=0; i<n; i++)  /* push arg[1...n] */
+    lua_rawgeti(L, 2, i+1);
+  status = lua_call(L, n, LUA_MULTRET);
+  if (err != 0) {  /* restore old error method */
+    lua_pushvalue(L, err);
+    lua_setglobal(L, LUA_ERRORMESSAGE);
+  }
+  if (status != 0) {  /* error in call? */
+    if (strchr(options, 'x'))
+      lua_pushnil(L);  /* return nil to signal the error */
+    else
+      lua_error(L, NULL);  /* propagate error without additional messages */
+    return 1;
+  }
+  if (strchr(options, 'p'))  /* pack results? */
+    lua_error(L, "deprecated option `p' in `call'");
+  return lua_gettop(L) - oldtop;  /* results are already on the stack */
+}
+
+
+static int luaB_tostring (lua_State *L) {
+  char buff[64];
+  switch (lua_type(L, 1)) {
+    case LUA_TNUMBER:
+      lua_pushstring(L, lua_tostring(L, 1));
+      return 1;
+    case LUA_TSTRING:
+      lua_pushvalue(L, 1);
+      return 1;
+    case LUA_TTABLE:
+      sprintf(buff, "table: %p", lua_topointer(L, 1));
+      break;
+    case LUA_TFUNCTION:
+      sprintf(buff, "function: %p", lua_topointer(L, 1));
+      break;
+    case LUA_TUSERDATA:
+      sprintf(buff, "userdata(%d): %p", lua_tag(L, 1), lua_touserdata(L, 1));
+      break;
+    case LUA_TNIL:
+      lua_pushstring(L, "nil");
+      return 1;
+    default:
+      luaL_argerror(L, 1, "value expected");
+  }
+  lua_pushstring(L, buff);
+  return 1;
+}
+
+
+static int luaB_foreachi (lua_State *L) {
+  int n, i;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  n = lua_getn(L, 1);
+  for (i=1; i<=n; i++) {
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushnumber(L, i);  /* 1st argument */
+    lua_rawgeti(L, 1, i);  /* 2nd argument */
+    lua_rawcall(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 1);  /* remove nil result */
+  }
+  return 0;
+}
+
+
+static int luaB_foreach (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_pushnil(L);  /* first index */
+  for (;;) {
+    if (lua_next(L, 1) == 0)
+      return 0;
+    lua_pushvalue(L, 2);  /* function */
+    lua_pushvalue(L, -3);  /* key */
+    lua_pushvalue(L, -3);  /* value */
+    lua_rawcall(L, 2, 1);
+    if (!lua_isnil(L, -1))
+      return 1;
+    lua_pop(L, 2);  /* remove value and result */
+  }
+}
+
+
+static int luaB_assert (lua_State *L) {
+  luaL_checkany(L, 1);
+  if (lua_isnil(L, 1))
+    luaL_verror(L, "assertion failed!  %.90s", luaL_opt_string(L, 2, ""));
+  return 0;
+}
+
+
+static int luaB_getn (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TTABLE);
+  lua_pushnumber(L, lua_getn(L, 1));
+  return 1;
+}
+
+
+static int luaB_tinsert (lua_State *L) {
+  int v = lua_gettop(L);  /* last argument: to be inserted */
+  int n, pos;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  n = lua_getn(L, 1);
+  if (v == 2)  /* called with only 2 arguments */
+    pos = n+1;
+  else
+    pos = luaL_check_int(L, 2);  /* 2nd argument is the position */
+  lua_pushstring(L, "n");
+  lua_pushnumber(L, n+1);
+  lua_rawset(L, 1);  /* t.n = n+1 */
+  for (; n>=pos; n--) {
+    lua_rawgeti(L, 1, n);
+    lua_rawseti(L, 1, n+1);  /* t[n+1] = t[n] */
+  }
+  lua_pushvalue(L, v);
+  lua_rawseti(L, 1, pos);  /* t[pos] = v */
+  return 0;
+}
+
+
+static int luaB_tremove (lua_State *L) {
+  int pos, n;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  n = lua_getn(L, 1);
+  pos = luaL_opt_int(L, 2, n);
+  if (n <= 0) return 0;  /* table is "empty" */
+  lua_rawgeti(L, 1, pos);  /* result = t[pos] */
+  for ( ;pos<n; pos++) {
+    lua_rawgeti(L, 1, pos+1);
+    lua_rawseti(L, 1, pos);  /* a[pos] = a[pos+1] */
+  }
+  lua_pushstring(L, "n");
+  lua_pushnumber(L, n-1);
+  lua_rawset(L, 1);  /* t.n = n-1 */
+  lua_pushnil(L);
+  lua_rawseti(L, 1, n);  /* t[n] = nil */
+  return 1;
+}
+
+
+
+
+/*
+** {======================================================
+** Quicksort
+** (based on `Algorithms in MODULA-3', Robert Sedgewick;
+**  Addison-Wesley, 1993.)
+*/
+
+
+static void set2 (lua_State *L, int i, int j) {
+  lua_rawseti(L, 1, i);
+  lua_rawseti(L, 1, j);
+}
+
+static int sort_comp (lua_State *L, int a, int b) {
+  /* WARNING: the caller (auxsort) must ensure stack space */
+  if (!lua_isnil(L, 2)) {  /* function? */
+    int res;
+    lua_pushvalue(L, 2);
+    lua_pushvalue(L, a-1);  /* -1 to compensate function */
+    lua_pushvalue(L, b-2);  /* -2 to compensate function and `a' */
+    lua_rawcall(L, 2, 1);
+    res = !lua_isnil(L, -1);
+    lua_pop(L, 1);
+    return res;
+  }
+  else  /* a < b? */
+    return lua_lessthan(L, a, b);
+}
+
+static void auxsort (lua_State *L, int l, int u) {
+  while (l < u) {  /* for tail recursion */
+    int i, j;
+    /* sort elements a[l], a[(l+u)/2] and a[u] */
+    lua_rawgeti(L, 1, l);
+    lua_rawgeti(L, 1, u);
+    if (sort_comp(L, -1, -2))  /* a[u] < a[l]? */
+      set2(L, l, u);  /* swap a[l] - a[u] */
+    else
+      lua_pop(L, 2);
+    if (u-l == 1) break;  /* only 2 elements */
+    i = (l+u)/2;
+    lua_rawgeti(L, 1, i);
+    lua_rawgeti(L, 1, l);
+    if (sort_comp(L, -2, -1))  /* a[i]<a[l]? */
+      set2(L, i, l);
+    else {
+      lua_pop(L, 1);  /* remove a[l] */
+      lua_rawgeti(L, 1, u);
+      if (sort_comp(L, -1, -2))  /* a[u]<a[i]? */
+        set2(L, i, u);
+      else
+        lua_pop(L, 2);
+    }
+    if (u-l == 2) break;  /* only 3 elements */
+    lua_rawgeti(L, 1, i);  /* Pivot */
+    lua_pushvalue(L, -1);
+    lua_rawgeti(L, 1, u-1);
+    set2(L, i, u-1);
+    /* a[l] <= P == a[u-1] <= a[u], only need to sort from l+1 to u-2 */
+    i = l; j = u-1;
+    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
+      /* repeat ++i until a[i] >= P */
+      while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
+        if (i>u) lua_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[i] */
+      }
+      /* repeat --j until a[j] <= P */
+      while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
+        if (j<l) lua_error(L, "invalid order function for sorting");
+        lua_pop(L, 1);  /* remove a[j] */
+      }
+      if (j<i) {
+        lua_pop(L, 3);  /* pop pivot, a[i], a[j] */
+        break;
+      }
+      set2(L, i, j);
+    }
+    lua_rawgeti(L, 1, u-1);
+    lua_rawgeti(L, 1, i);
+    set2(L, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
+    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
+    /* adjust so that smaller "half" is in [j..i] and larger one in [l..u] */
+    if (i-l < u-i) {
+      j=l; i=i-1; l=i+2;
+    }
+    else {
+      j=i+1; i=u; u=j-2;
+    }
+    auxsort(L, j, i);  /* call recursively the smaller one */
+  }  /* repeat the routine for the larger one */
+}
+
+static int luaB_sort (lua_State *L) {
+  int n;
+  luaL_checktype(L, 1, LUA_TTABLE);
+  n = lua_getn(L, 1);
+  if (!lua_isnull(L, 2))  /* is there a 2nd argument? */
+    luaL_checktype(L, 2, LUA_TFUNCTION);
+  lua_settop(L, 2);  /* make sure there is two arguments */
+  auxsort(L, 1, n);
+  return 0;
+}
+
+/* }====================================================== */
+
+
+
+/*
+** {======================================================
+** Deprecated functions to manipulate global environment.
+** =======================================================
+*/
+
+
+#define num_deprecated	4
+
+static const struct luaL_reg deprecated_names [num_deprecated] = {
+  {"foreachvar", luaB_foreach},
+  {"nextvar", luaB_next},
+  {"rawgetglobal", luaB_rawget},
+  {"rawsetglobal", luaB_rawset}
+};
+
+
+#ifdef LUA_DEPRECATEDFUNCS
+
+/*
+** call corresponding function inserting `globals' as first argument
+*/
+static int deprecated_func (lua_State *L) {
+  lua_insert(L, 1);  /* upvalue is the function to be called */
+  lua_getglobals(L);
+  lua_insert(L, 2);  /* table of globals is 1o argument */
+  lua_rawcall(L, lua_gettop(L)-1, LUA_MULTRET);
+  return lua_gettop(L);  /* return all results */
+}
+
+
+static void deprecated_funcs (lua_State *L) {
+  int i;
+  for (i=0; i<num_deprecated; i++) {
+    lua_pushcfunction(L, deprecated_names[i].func);
+    lua_pushcclosure(L, deprecated_func, 1);
+    lua_setglobal(L, deprecated_names[i].name);
+  }
+}
+
+
+#else
+
+/*
+** gives an explicit error in any attempt to call a deprecated function
+*/
+static int deprecated_func (lua_State *L) {
+  luaL_verror(L, "function `%.20s' is deprecated", lua_tostring(L, -1));
+  return 0;  /* to avoid warnings */
+}
+
+
+static void deprecated_funcs (lua_State *L) {
+  int i;
+  for (i=0; i<num_deprecated; i++) {
+    lua_pushstring(L, deprecated_names[i].name);
+    lua_pushcclosure(L, deprecated_func, 1);
+    lua_setglobal(L, deprecated_names[i].name);
+  }
+}
+
+#endif
+
+/* }====================================================== */
+
+static const struct luaL_reg base_funcs[] = {
+  {LUA_ALERT, luaB__ALERT},
+  {LUA_ERRORMESSAGE, luaB__ERRORMESSAGE},
+  {"call", luaB_call},
+  {"collectgarbage", luaB_collectgarbage},
+  {"copytagmethods", luaB_copytagmethods},
+  {"dofile", luaB_dofile},
+  {"dostring", luaB_dostring},
+  {"error", luaB_error},
+  {"foreach", luaB_foreach},
+  {"foreachi", luaB_foreachi},
+  {"gcinfo", luaB_gcinfo},
+  {"getglobal", luaB_getglobal},
+  {"gettagmethod", luaB_gettagmethod},
+  {"globals", luaB_globals},
+  {"newtag", luaB_newtag},
+  {"next", luaB_next},
+  {"print", luaB_print},
+  {"rawget", luaB_rawget},
+  {"rawset", luaB_rawset},
+  {"rawgettable", luaB_rawget},  /* for compatibility */
+  {"rawsettable", luaB_rawset},  /* for compatibility */
+  {"setglobal", luaB_setglobal},
+  {"settag", luaB_settag},
+  {"settagmethod", luaB_settagmethod},
+  {"tag", luaB_tag},
+  {"tonumber", luaB_tonumber},
+  {"tostring", luaB_tostring},
+  {"type", luaB_type},
+  {"assert", luaB_assert},
+  {"getn", luaB_getn},
+  {"sort", luaB_sort},
+  {"tinsert", luaB_tinsert},
+  {"tremove", luaB_tremove}
+};
+
+
+
+LUALIB_API void lua_baselibopen (lua_State *L) {
+  luaL_openl(L, base_funcs);
+  lua_pushstring(L, LUA_VERSION);
+  lua_setglobal(L, "_VERSION");
+  deprecated_funcs(L);
+}
+

lbuffer.c

@@ -1,79 +0,0 @@
-/*
-** $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
-*/
-
-
-#include <stdio.h>
-
-#define LUA_REENTRANT
-
-#include "lauxlib.h"
-#include "lmem.h"
-#include "lstate.h"
-
-
-/*-------------------------------------------------------
-**  Auxiliary buffer
--------------------------------------------------------*/
-
-
-/*
-** 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)
-
-static void Openspace (lua_State *L, int size) {
-  L->Mbuffsize = (L->Mbuffnext+size+EXTRABUFF)*2;
-  luaM_reallocvector(L, L->Mbuffer, L->Mbuffsize, char);
-}
-
-
-char *luaL_openspace (lua_State *L, int size) {
-  openspace(L, size);
-  return L->Mbuffer+L->Mbuffnext;
-}
-
-
-void luaL_addchar (lua_State *L, int c) {
-  openspace(L, 1);
-  L->Mbuffer[L->Mbuffnext++] = (char)c;
-}
-
-
-void luaL_resetbuffer (lua_State *L) {
-  L->Mbuffnext = L->Mbuffbase;
-}
-
-
-void luaL_addsize (lua_State *L, int n) {
-  L->Mbuffnext += n;
-}
-
-int luaL_getsize (lua_State *L) {
-  return L->Mbuffnext-L->Mbuffbase;
-}
-
-int luaL_newbuffer (lua_State *L, int size) {
-  int old = L->Mbuffbase;
-  openspace(L, size);
-  L->Mbuffbase = L->Mbuffnext;
-  return old;
-}
-
-
-void luaL_oldbuffer (lua_State *L, int old) {
-  L->Mbuffnext = L->Mbuffbase;
-  L->Mbuffbase = old;
-}
-
-
-char *luaL_buffer (lua_State *L) {
-  return L->Mbuffer+L->Mbuffbase;
-}
-

lbuiltin.c

@@ -1,662 +0,0 @@
-/*
-** $Id: lbuiltin.c,v 1.105 2000/04/14 17:44:20 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>
-#include <string.h>
-
-#define LUA_REENTRANT
-
-#include "lapi.h"
-#include "lauxlib.h"
-#include "lbuiltin.h"
-#include "ldo.h"
-#include "lfunc.h"
-#include "lmem.h"
-#include "lobject.h"
-#include "lstate.h"
-#include "lstring.h"
-#include "ltable.h"
-#include "ltm.h"
-#include "lua.h"
-#include "lundump.h"
-#include "lvm.h"
-
-
-
-/*
-** function defined in ltests.c, to open some internal-test functions
-*/
-void luaB_opentests (lua_State *L);
-
-
-
-/*
-** {======================================================
-** Auxiliary functions
-** =======================================================
-*/
-
-
-static void pushtagstring (lua_State *L, TString *s) {
-  ttype(L->top) = TAG_STRING;
-  tsvalue(L->top) = s;
-  incr_top;
-}
-
-
-static Number getsize (const Hash *h) {
-  Number max = 0;
-  int i = h->size;
-  Node *n = h->node;
-  while (i--) {
-    if (ttype(key(n)) == TAG_NUMBER && 
-        ttype(val(n)) != TAG_NIL &&
-        nvalue(key(n)) > max)
-      max = nvalue(key(n));
-    n++;
-  }
-  return max;
-}
-
-
-static Number getnarg (lua_State *L, const Hash *a) {
-  TObject index;
-  const TObject *value;
-  /* value = table.n */
-  ttype(&index) = TAG_STRING;
-  tsvalue(&index) = luaS_new(L, "n");
-  value = luaH_get(L, a, &index);
-  return (ttype(value) == TAG_NUMBER) ? nvalue(value) : getsize(a);
-}
-
-
-static Hash *gettable (lua_State *L, int arg) {
-  return avalue(luaL_tablearg(L, arg));
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Functions that use only the official API
-** =======================================================
-*/
-
-
-/*
-** If your system does not support `stderr', redefine this function, or
-** redefine _ERRORMESSAGE so that it won't need _ALERT.
-*/
-void luaB__ALERT (lua_State *L) {
-  fputs(luaL_check_string(L, 1), stderr);
-}
-
-
-/*
-** Standard implementation of _ERRORMESSAGE.
-** The library `liolib' redefines _ERRORMESSAGE for better error information.
-*/
-void luaB__ERRORMESSAGE (lua_State *L) {
-  lua_Object al = lua_rawgetglobal(L, "_ALERT");
-  if (lua_isfunction(L, al)) {  /* avoid error loop if _ALERT is not defined */
-    const char *s = luaL_check_string(L, 1);
-    char *buff = luaL_openspace(L, strlen(s)+sizeof("error: \n"));
-    strcpy(buff, "error: "); strcat(buff, s); strcat(buff, "\n");
-    lua_pushstring(L, buff);
-    lua_callfunction(L, al);
-  }
-}
-
-
-/*
-** 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).
-*/
-void luaB_print (lua_State *L) {
-  lua_Object args[MAXPRINT];
-  lua_Object obj;
-  int n = 0;
-  int i;
-  while ((obj = lua_getparam(L, n+1)) != LUA_NOOBJECT) {
-    luaL_arg_check(L, n < MAXPRINT, n+1, "too many arguments");
-    args[n++] = obj;
-  }
-  for (i=0; i<n; i++) {
-    lua_pushobject(L, args[i]);
-    if (lua_call(L, "tostring"))
-      lua_error(L, "error in `tostring' called by `print'");
-    obj = lua_getresult(L, 1);
-    if (!lua_isstring(L, obj))
-      lua_error(L, "`tostring' must return a string to `print'");
-    if (i>0) fputs("\t", stdout);
-    fputs(lua_getstring(L, obj), stdout);
-  }
-  fputs("\n", stdout);
-}
-
-
-void luaB_tonumber (lua_State *L) {
-  int base = luaL_opt_int(L, 2, 10);
-  if (base == 10) {  /* standard conversion */
-    lua_Object o = luaL_nonnullarg(L, 1);
-    if (lua_isnumber(L, o)) {
-      lua_pushnumber(L, lua_getnumber(L, o));
-      return;
-    }
-  }
-  else {
-    const char *s1 = luaL_check_string(L, 1);
-    char *s2;
-    Number n;
-    luaL_arg_check(L, 2 <= base && base <= 36, 2, "base out of range");
-    n = strtoul(s1, &s2, base);
-    if (s1 != s2) {  /* at least one valid digit? */
-      while (isspace((unsigned char)*s2)) s2++;  /* skip trailing spaces */
-      if (*s2 == '\0') {  /* no invalid trailing characters? */
-        lua_pushnumber(L, n);
-        return;
-      }
-    }
-  }
-  lua_pushnil(L);  /* else not a number */
-}
-
-
-void luaB_error (lua_State *L) {
-  lua_error(L, luaL_opt_string(L, 1, NULL));
-}
-
-void luaB_setglobal (lua_State *L) {
-  const char *name = luaL_check_string(L, 1);
-  lua_Object value = luaL_nonnullarg(L, 2);
-  lua_pushobject(L, value);
-  lua_setglobal(L, name);
-}
-
-void luaB_rawsetglobal (lua_State *L) {
-  const char *name = luaL_check_string(L, 1);
-  lua_Object value = luaL_nonnullarg(L, 2);
-  lua_pushobject(L, value);
-  lua_rawsetglobal(L, name);
-}
-
-void luaB_getglobal (lua_State *L) {
-  lua_pushobject(L, lua_getglobal(L, luaL_check_string(L, 1)));
-}
-
-void luaB_rawgetglobal (lua_State *L) {
-  lua_pushobject(L, lua_rawgetglobal(L, luaL_check_string(L, 1)));
-}
-
-void luaB_tag (lua_State *L) {
-  lua_pushnumber(L, lua_tag(L, luaL_nonnullarg(L, 1)));
-}
-
-void luaB_settag (lua_State *L) {
-  lua_Object o = luaL_tablearg(L, 1);
-  lua_pushobject(L, o);
-  lua_settag(L, luaL_check_int(L, 2));
-  lua_pushobject(L, o);  /* return first argument */
-}
-
-void luaB_newtag (lua_State *L) {
-  lua_pushnumber(L, lua_newtag(L));
-}
-
-void luaB_copytagmethods (lua_State *L) {
-  lua_pushnumber(L, lua_copytagmethods(L, luaL_check_int(L, 1),
-                                          luaL_check_int(L, 2)));
-}
-
-void luaB_rawgettable (lua_State *L) {
-  lua_pushobject(L, luaL_nonnullarg(L, 1));
-  lua_pushobject(L, luaL_nonnullarg(L, 2));
-  lua_pushobject(L, lua_rawgettable(L));
-}
-
-void luaB_rawsettable (lua_State *L) {
-  lua_pushobject(L, luaL_nonnullarg(L, 1));
-  lua_pushobject(L, luaL_nonnullarg(L, 2));
-  lua_pushobject(L, luaL_nonnullarg(L, 3));
-  lua_rawsettable(L);
-}
-
-void luaB_settagmethod (lua_State *L) {
-  int tag = luaL_check_int(L, 1);
-  const char *event = luaL_check_string(L, 2);
-  lua_Object nf = luaL_nonnullarg(L, 3);
-  luaL_arg_check(L, lua_isnil(L, nf) || lua_isfunction(L, nf), 3,
-                 "function or nil expected");
-  if (strcmp(event, "gc") == 0 && tag != TAG_NIL)
-    lua_error(L, "deprecated use: cannot set the `gc' tag method from Lua");
-  lua_pushobject(L, nf);
-  lua_pushobject(L, lua_settagmethod(L, tag, event));
-}
-
-void luaB_gettagmethod (lua_State *L) {
-  lua_pushobject(L, lua_gettagmethod(L, luaL_check_int(L, 1),
-                                        luaL_check_string(L, 2)));
-}
-
-
-void luaB_collectgarbage (lua_State *L) {
-  lua_pushnumber(L, lua_collectgarbage(L, luaL_opt_int(L, 1, 0)));
-}
-
-
-void luaB_type (lua_State *L) {
-  lua_Object o = luaL_nonnullarg(L, 1);
-  lua_pushstring(L, lua_type(L, o));
-}
-
-/* }====================================================== */
-
-
-/*
-** {======================================================
-** Functions that could use only the official API but
-** do not, for efficiency.
-** =======================================================
-*/
-
-
-static void passresults (lua_State *L) {
-  L->Cstack.base = L->Cstack.lua2C;  /* position of first result */
-  if (L->Cstack.num == 0)
-    lua_pushuserdata(L, NULL);  /* at least one result to signal no errors */
-}
-
-void luaB_dostring (lua_State *L) {
-  long l;
-  const char *s = luaL_check_lstr(L, 1, &l);
-  if (*s == ID_CHUNK)
-    lua_error(L, "`dostring' cannot run pre-compiled code");
-  if (lua_dobuffer(L, s, l, luaL_opt_string(L, 2, s)) == 0)
-    passresults(L);
-  else
-    lua_pushnil(L);
-}
-
-
-void luaB_dofile (lua_State *L) {
-  const char *fname = luaL_opt_string(L, 1, NULL);
-  if (lua_dofile(L, fname) == 0)
-    passresults(L);
-  else
-    lua_pushnil(L);
-}
-
-
-void luaB_call (lua_State *L) {
-  lua_Object f = luaL_nonnullarg(L, 1);
-  const Hash *arg = gettable(L, 2);
-  const char *options = luaL_opt_string(L, 3, "");
-  lua_Object err = lua_getparam(L, 4);
-  int narg = (int)getnarg(L, arg);
-  int i, status;
-  if (err != LUA_NOOBJECT) {  /* set new error method */
-    lua_Object oldem = lua_getglobal(L, "_ERRORMESSAGE");
-    lua_pushobject(L, err);
-    lua_setglobal(L, "_ERRORMESSAGE");
-    err = oldem;
-  }
-  /* push arg[1...n] */
-  luaD_checkstack(L, narg);
-  for (i=0; i<narg; i++)
-    *(L->top++) = *luaH_getint(L, arg, i+1);
-  status = lua_callfunction(L, f);
-  if (err != LUA_NOOBJECT) {  /* restore old error method */
-    lua_pushobject(L, err);
-    lua_setglobal(L, "_ERRORMESSAGE");
-  }
-  if (status != 0) {  /* error in call? */
-    if (strchr(options, 'x')) {
-      lua_pushnil(L);
-      return;  /* return nil to signal the error */
-    }
-    else
-      lua_error(L, NULL);  /* propagate error without additional messages */
-  }
-  else {  /* no errors */
-    if (strchr(options, 'p')) {  /* pack results? */
-      luaV_pack(L, L->Cstack.lua2C, L->Cstack.num, L->top);
-      incr_top;
-    }
-    else
-      L->Cstack.base = L->Cstack.lua2C;  /* position of first result */
-  }
-}
-
-
-void luaB_nextvar (lua_State *L) {
-  lua_Object o = lua_getparam(L, 1);
-  TString *name;
-  if (o == LUA_NOOBJECT || ttype(o) == TAG_NIL)
-    name = NULL;
-  else {
-    luaL_arg_check(L, ttype(o) == TAG_STRING, 1, "variable name expected");
-    name = tsvalue(o);
-  }
-  if (!luaA_nextvar(L, name))
-    lua_pushnil(L);
-}
-
-
-void luaB_next (lua_State *L) {
-  const Hash *a = gettable(L, 1);
-  lua_Object k = lua_getparam(L, 2);
-  int i;  /* `luaA_next' gets first element after `i' */
-  if (k == LUA_NOOBJECT || ttype(k) == TAG_NIL)
-    i = 0;  /* get first */
-  else {
-    i = luaH_pos(L, a, k)+1;
-    luaL_arg_check(L, i != 0, 2, "key not found");
-  }
-  if (luaA_next(L, a, i) == 0)
-    lua_pushnil(L);
-}
-
-
-void luaB_tostring (lua_State *L) {
-  lua_Object o = luaL_nonnullarg(L, 1);
-  char buff[64];
-  switch (ttype(o)) {
-    case TAG_NUMBER:
-      lua_pushstring(L, lua_getstring(L, o));
-      return;
-    case TAG_STRING:
-      lua_pushobject(L, o);
-      return;
-    case TAG_TABLE:
-      sprintf(buff, "table: %p", o->value.a);
-      break;
-    case TAG_LCLOSURE:  case TAG_CCLOSURE:
-      sprintf(buff, "function: %p", o->value.cl);
-      break;
-    case TAG_USERDATA:
-      sprintf(buff, "userdata: %p(%d)", o->value.ts->u.d.value,
-                                        o->value.ts->u.d.tag);
-      break;
-    case TAG_NIL:
-      lua_pushstring(L, "nil");
-      return;
-    default:
-      LUA_INTERNALERROR(L, "invalid type");
-  }
-  lua_pushstring(L, buff);
-}
-
-/* }====================================================== */
-
-
-
-/*
-** {======================================================
-** "Extra" functions
-** These functions can be written in Lua, so you can
-**  delete them if you need a tiny Lua implementation.
-** If you delete them, remove their entries in array
-** "builtin_funcs".
-** =======================================================
-*/
-
-void luaB_assert (lua_State *L) {
-  lua_Object p = luaL_nonnullarg(L, 1);
-  if (lua_isnil(L, p))
-    luaL_verror(L, "assertion failed!  %.90s", luaL_opt_string(L, 2, ""));
-}
-
-
-void luaB_foreachi (lua_State *L) {
-  const Hash *t = gettable(L, 1);
-  int n = (int)getnarg(L, t);
-  int i;
-  lua_Object f = luaL_functionarg(L, 2);
-  luaD_checkstack(L, 3);  /* for f, key, and val */
-  for (i=1; i<=n; i++) {
-    *(L->top++) = *f;
-    ttype(L->top) = TAG_NUMBER; nvalue(L->top++) = i;
-    *(L->top++) = *luaH_getint(L, t, i);
-    luaD_call(L, L->top-3, 1);
-    if (ttype(L->top-1) != TAG_NIL)
-      return;
-    L->top--;  /* remove nil result */
-  }
-}
-
-
-void luaB_foreach (lua_State *L) {
-  const Hash *a = gettable(L, 1);
-  lua_Object f = luaL_functionarg(L, 2);
-  int i;
-  luaD_checkstack(L, 3);  /* for f, key, and val */
-  for (i=0; i<a->size; i++) {
-    const Node *nd = &(a->node[i]);
-    if (ttype(val(nd)) != TAG_NIL) {
-      *(L->top++) = *f;
-      *(L->top++) = *key(nd);
-      *(L->top++) = *val(nd);
-      luaD_call(L, L->top-3, 1);
-      if (ttype(L->top-1) != TAG_NIL)
-        return;
-      L->top--;  /* remove result */
-    }
-  }
-}
-
-
-void luaB_foreachvar (lua_State *L) {
-  lua_Object f = luaL_functionarg(L, 1);
-  GlobalVar *gv;
-  luaD_checkstack(L, 4);  /* for extra var name, f, var name, and globalval */
-  for (gv = L->rootglobal; gv; gv = gv->next) {
-    if (gv->value.ttype != TAG_NIL) {
-      pushtagstring(L, gv->name);  /* keep (extra) name on stack to avoid GC */
-      *(L->top++) = *f;
-      pushtagstring(L, gv->name);
-      *(L->top++) = gv->value;
-      luaD_call(L, L->top-3, 1);
-      if (ttype(L->top-1) != TAG_NIL) {
-        *(L->top-2) = *(L->top-1);  /* remove extra name */
-        L->top--;
-        return;
-      }
-      L->top-=2;  /* remove result and extra name */
-    }
-  }
-}
-
-
-void luaB_getn (lua_State *L) {
-  lua_pushnumber(L, getnarg(L, gettable(L, 1)));
-}
-
-
-void luaB_tinsert (lua_State *L) {
-  Hash *a = gettable(L, 1);
-  lua_Object v = lua_getparam(L, 3);
-  int n = (int)getnarg(L, a);
-  int pos;
-  if (v != LUA_NOOBJECT)
-    pos = luaL_check_int(L, 2);
-  else {  /* called with only 2 arguments */
-    v = luaL_nonnullarg(L, 2);
-    pos = n+1;
-  }
-  luaV_setn(L, a, n+1);  /* a.n = n+1 */
-  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 */
-}
-
-
-void luaB_tremove (lua_State *L) {
-  Hash *a = gettable(L, 1);
-  int n = (int)getnarg(L, a);
-  int pos = luaL_opt_int(L, 2, n);
-  if (n <= 0) return;  /* table is "empty" */
-  luaA_pushobject(L, luaH_getint(L, a, pos));  /* result = a[pos] */
-  for ( ;pos<n; pos++)
-    luaH_move(L, a, pos+1, pos);  /* a[pos] = a[pos+1] */
-  luaV_setn(L, a, n-1);  /* a.n = n-1 */
-  luaH_setint(L, a, n, &luaO_nilobject);  /* a[n] = nil */
-}
-
-
-/*
-** {======================================================
-** Quicksort
-** (based on `Algorithms in MODULA-3', Robert Sedgewick; Addison-Wesley, 1993.)
-*/
-
-static void swap (lua_State *L, Hash *a, int i, int j) {
-  TObject temp;
-  temp = *luaH_getint(L, a, i);
-  luaH_move(L, a, j, i);
-  luaH_setint(L, a, j, &temp);
-}
-
-static int sort_comp (lua_State *L, lua_Object f, const TObject *a,
-                                                  const TObject *b) {
-  /* WARNING: the caller (auxsort) must ensure stack space */
-  if (f != LUA_NOOBJECT) {
-    *(L->top) = *f;
-    *(L->top+1) = *a;
-    *(L->top+2) = *b;
-    L->top += 3;
-    luaD_call(L, L->top-3, 1);
-    L->top--;
-    return (ttype(L->top) != TAG_NIL);
-  }
-  else  /* a < b? */
-    return luaV_lessthan(L, a, b, L->top);
-}
-
-static void auxsort (lua_State *L, Hash *a, int l, int u, lua_Object f) {
-  StkId P = L->top++;  /* temporary place for pivot */
-  ttype(P) = TAG_NIL;
-  while (l < u) {  /* for tail recursion */
-    int i, j;
-    /* sort elements a[l], a[(l+u)/2] and a[u] */
-    if (sort_comp(L, f, luaH_getint(L, a, u), luaH_getint(L, a, l)))
-      swap(L, a, l, u);  /* a[u]<a[l] */
-    if (u-l == 1) break;  /* only 2 elements */
-    i = (l+u)/2;
-    *P = *luaH_getint(L, a, i);  /* P = a[i] */
-    if (sort_comp(L, f, P, luaH_getint(L, a, l)))  /* a[i]<a[l]? */
-      swap(L, a, l, i);
-    else if (sort_comp(L, f, luaH_getint(L, a, u), P))  /* a[u]<a[i]? */
-      swap(L, a, i, u);
-    if (u-l == 2) break;  /* only 3 elements */
-    *P = *luaH_getint(L, a, i);  /* save pivot on stack (GC) */
-    swap(L, a, i, u-1);  /* put median element as pivot (a[u-1]) */
-    /* a[l] <= P == a[u-1] <= a[u], only needs to sort from l+1 to u-2 */
-    i = l; j = u-1;
-    for (;;) {  /* invariant: a[l..i] <= P <= a[j..u] */
-      /* repeat i++ until a[i] >= P */
-      while (sort_comp(L, f, luaH_getint(L, a, ++i), P))
-        if (i>u) lua_error(L, "invalid order function for sorting");
-      /* repeat j-- until a[j] <= P */
-      while (sort_comp(L, f, P, luaH_getint(L, a, --j)))
-        if (j<l) lua_error(L, "invalid order function for sorting");
-      if (j<i) break;
-      swap(L, a, i, j);
-    }
-    swap(L, a, u-1, i);  /* swap pivot (a[u-1]) with a[i] */
-    /* a[l..i-1] <= a[i] == P <= a[i+1..u] */
-    /* adjust so that smaller "half" is in [j..i] and larger one in [l..u] */
-    if (i-l < u-i) {
-      j=l; i=i-1; l=i+2;
-    }
-    else {
-      j=i+1; i=u; u=j-2;
-    }
-    auxsort(L, a, j, i, f);  /* call recursively the smaller one */
-  }  /* repeat the routine for the larger one */
-  L->top--;  /* remove pivot from stack */
-}
-
-void luaB_sort (lua_State *L) {
-  Hash *a = gettable(L, 1);
-  int n = (int)getnarg(L, a);
-  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) */
-  auxsort(L, a, 1, n, func);
-}
-
-/* }====================================================== */
-
-
-/* }====================================================== */
-
-
-static const struct luaL_reg builtin_funcs[] = {
-  {"_ALERT", luaB__ALERT},
-  {"_ERRORMESSAGE", luaB__ERRORMESSAGE},
-  {"call", luaB_call},
-  {"collectgarbage", luaB_collectgarbage},
-  {"copytagmethods", luaB_copytagmethods},
-  {"dofile", luaB_dofile},
-  {"dostring", luaB_dostring},
-  {"error", luaB_error},
-  {"getglobal", luaB_getglobal},
-  {"gettagmethod", luaB_gettagmethod},
-  {"newtag", luaB_newtag},
-  {"next", luaB_next},
-  {"nextvar", luaB_nextvar},
-  {"print", luaB_print},
-  {"rawgetglobal", luaB_rawgetglobal},
-  {"rawgettable", luaB_rawgettable},
-  {"rawsetglobal", luaB_rawsetglobal},
-  {"rawsettable", luaB_rawsettable},
-  {"setglobal", luaB_setglobal},
-  {"settag", luaB_settag},
-  {"settagmethod", luaB_settagmethod},
-  {"tag", luaB_tag},
-  {"tonumber", luaB_tonumber},
-  {"tostring", luaB_tostring},
-  {"type", luaB_type},
-/* "Extra" functions */
-  {"assert", luaB_assert},
-  {"foreach", luaB_foreach},
-  {"foreachi", luaB_foreachi},
-  {"foreachvar", luaB_foreachvar},
-  {"getn", luaB_getn},
-  {"sort", luaB_sort},
-  {"tinsert", luaB_tinsert},
-  {"tremove", luaB_tremove}
-};
-
-
-void luaB_predefine (lua_State *L) {
-  /* pre-register mem error messages, to avoid loop when error arises */
-  luaS_newfixed(L, tableEM);
-  luaS_newfixed(L, memEM);
-  luaL_openl(L, builtin_funcs);
-#ifdef DEBUG
-  luaB_opentests(L);  /* internal test functions */
-#endif
-  lua_pushstring(L, LUA_VERSION);
-  lua_setglobal(L, "_VERSION");
-}
-

lbuiltin.h

@@ -1,49 +0,0 @@
-/*
-** $Id: lbuiltin.h,v 1.6 2000/03/03 14:58:26 roberto Exp roberto $
-** Built-in functions
-** See Copyright Notice in lua.h
-*/
-
-#ifndef lbuiltin_h
-#define lbuiltin_h
-
-#include "lua.h"
-
-void luaB__ALERT (lua_State *L);
-void luaB__ERRORMESSAGE (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_foreach (lua_State *L);
-void luaB_foreachi (lua_State *L);
-void luaB_foreachvar (lua_State *L);
-void luaB_getglobal (lua_State *L);
-void luaB_getn (lua_State *L);
-void luaB_gettagmethod (lua_State *L);
-void luaB_newtag (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_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_type (lua_State *L);
-
-void luaB_predefine (lua_State *L);
-
-
-#endif

lcode.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.c,v 1.27 2000/04/17 14:05:34 roberto Exp roberto $
+** $Id: lcode.c,v 1.50 2000/08/31 14:08:27 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -7,7 +7,7 @@
 
 #include "stdlib.h"
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lcode.h"
 #include "ldo.h"
@@ -16,11 +16,10 @@
 #include "lobject.h"
 #include "lopcodes.h"
 #include "lparser.h"
-#include "lstring.h"
 
 
 void luaK_error (LexState *ls, const char *msg) {
-  luaX_error(ls, msg, ls->token);
+  luaX_error(ls, msg, ls->t.token);
 }
 
 
@@ -38,7 +37,7 @@ static Instruction previous_instruction (FuncState *fs) {
 
 
 int luaK_jump (FuncState *fs) {
-  int j = luaK_code0(fs, OP_JMP);
+  int j = luaK_code1(fs, OP_JMP, NO_JUMP);
   if (j == fs->lasttarget) {  /* possible jumps to this jump? */
     luaK_concat(fs, &j, fs->jlt);  /* keep them on hold */
     fs->jlt = NO_JUMP;
@@ -70,16 +69,16 @@ static int luaK_getjump (FuncState *fs, int pc) {
 
 
 /*
-** discharge list of jumps to last target.
 ** returns current `pc' and marks it as a jump target (to avoid wrong
 ** optimizations with consecutive instructions not in the same basic block).
+** discharge list of jumps to last target.
 */
 int luaK_getlabel (FuncState *fs) {
   if (fs->pc != fs->lasttarget) {
     int lasttarget = fs->lasttarget;
     fs->lasttarget = fs->pc;
     luaK_patchlist(fs, fs->jlt, lasttarget);  /* discharge old list `jlt' */
-    fs->jlt = NO_JUMP;  /* nobody jumps to this new label (till now) */
+    fs->jlt = NO_JUMP;  /* nobody jumps to this new label (yet) */
   }
   return fs->pc;
 }
@@ -87,7 +86,7 @@ int luaK_getlabel (FuncState *fs) {
 
 void luaK_deltastack (FuncState *fs, int delta) {
   fs->stacklevel += delta;
-  if (delta > 0 && fs->stacklevel > fs->f->maxstacksize) {
+  if (fs->stacklevel > fs->f->maxstacksize) {
     if (fs->stacklevel > MAXSTACK)
       luaK_error(fs->ls, "function or expression too complex");
     fs->f->maxstacksize = fs->stacklevel;
@@ -100,7 +99,7 @@ void luaK_kstr (LexState *ls, int c) {
 }
 
 
-static int real_constant (FuncState *fs, Number r) {
+static int number_constant (FuncState *fs, Number r) {
   /* check whether `r' has appeared within the last LOOKBACKNUMS entries */
   Proto *f = fs->f;
   int c = f->nknum;
@@ -108,7 +107,8 @@ static int real_constant (FuncState *fs, Number r) {
   while (--c >= lim)
     if (f->knum[c] == r) return c;
   /* not found; create a new entry */
-  luaM_growvector(fs->L, f->knum, f->nknum, 1, Number, constantEM, MAXARG_U);
+  luaM_growvector(fs->L, f->knum, f->nknum, 1, Number,
+                  "constant table overflow", MAXARG_U);
   c = f->nknum++;
   f->knum[c] = r;
   return c;
@@ -116,17 +116,17 @@ static int real_constant (FuncState *fs, Number r) {
 
 
 void luaK_number (FuncState *fs, Number f) {
-  if (f <= (Number)MAXARG_S && (int)f == f)
+  if (f <= (Number)MAXARG_S && (Number)(int)f == f)
     luaK_code1(fs, OP_PUSHINT, (int)f);  /* f has a short integer value */
   else
-    luaK_code1(fs, OP_PUSHNUM, real_constant(fs, f));
+    luaK_code1(fs, OP_PUSHNUM, number_constant(fs, f));
 }
 
 
 void luaK_adjuststack (FuncState *fs, int n) {
   if (n > 0)
     luaK_code1(fs, OP_POP, n);
-  else if (n < 0)
+  else
     luaK_code1(fs, OP_PUSHNIL, -n);
 }
 
@@ -148,11 +148,6 @@ void luaK_setcallreturns (FuncState *fs, int nresults) {
 }
 
 
-static void assertglobal (FuncState *fs, int index) {
-  luaS_assertglobal(fs->L, fs->f->kstr[index]);
-}
-
-
 static int discharge (FuncState *fs, expdesc *var) {
   switch (var->k) {
     case VLOCAL:
@@ -160,7 +155,6 @@ static int discharge (FuncState *fs, expdesc *var) {
       break;
     case VGLOBAL:
       luaK_code1(fs, OP_GETGLOBAL, var->u.index);
-      assertglobal(fs, var->u.index);  /* make sure that there is a global */
       break;
     case VINDEXED:
       luaK_code0(fs, OP_GETTABLE);
@@ -176,7 +170,7 @@ static int discharge (FuncState *fs, expdesc *var) {
 
 static void discharge1 (FuncState *fs, expdesc *var) {
   discharge(fs, var);
- /* if it has jumps it is already discharged */
+ /* if it has jumps then it is already discharged */
   if (var->u.l.t == NO_JUMP && var->u.l.f  == NO_JUMP)
     luaK_setcallreturns(fs, 1);  /* call must return 1 value */
 }
@@ -190,13 +184,12 @@ void luaK_storevar (LexState *ls, const expdesc *var) {
       break;
     case VGLOBAL:
       luaK_code1(fs, OP_SETGLOBAL, var->u.index);
-      assertglobal(fs, var->u.index);  /* make sure that there is a global */
       break;
     case VINDEXED:  /* table is at top-3; pop 3 elements after operation */
       luaK_code2(fs, OP_SETTABLE, 3, 3);
       break;
     default:
-      LUA_INTERNALERROR(ls->L, "invalid var kind to store");
+      LUA_INTERNALERROR("invalid var kind to store");
   }
 }
 
@@ -212,7 +205,7 @@ static OpCode invertjump (OpCode op) {
     case OP_JMPT: case OP_JMPONT:  return OP_JMPF;
     case OP_JMPF: case OP_JMPONF:  return OP_JMPT;
     default:
-      LUA_INTERNALERROR(NULL, "invalid jump instruction");
+      LUA_INTERNALERROR("invalid jump instruction");
       return OP_END;  /* to avoid warnings */
   }
 }
@@ -273,22 +266,28 @@ void luaK_concat (FuncState *fs, int *l1, int l2) {
 
 
 static void luaK_testgo (FuncState *fs, expdesc *v, int invert, OpCode jump) {
+  int prevpos;  /* position of last instruction */
   Instruction *previous;
-  int *golist = &v->u.l.f;
-  int *exitlist = &v->u.l.t;
-  if (invert) {  /* interchange `golist' and `exitlist' */
-    int *temp = golist; golist = exitlist; exitlist = temp;
+  int *golist, *exitlist;
+  if (!invert) {
+    golist = &v->u.l.f;    /* go if false */
+    exitlist = &v->u.l.t;  /* exit if true */
+  }
+  else {
+    golist = &v->u.l.t;    /* go if true */
+    exitlist = &v->u.l.f;  /* exit if false */
   }
   discharge1(fs, v);
-  previous = &fs->f->code[fs->pc-1];
-  LUA_ASSERT(L, GET_OPCODE(*previous) != OP_SETLINE, "bad place to set line");
-  if (ISJUMP(GET_OPCODE(*previous))) {
+  prevpos = fs->pc-1;
+  previous = &fs->f->code[prevpos];
+  LUA_ASSERT(*previous==previous_instruction(fs), "no jump allowed here");
+  if (!ISJUMP(GET_OPCODE(*previous)))
+    prevpos = luaK_code1(fs, jump, NO_JUMP);
+  else {  /* last instruction is already a jump */
     if (invert)
       SET_OPCODE(*previous, invertjump(GET_OPCODE(*previous)));
   }
-  else
-    luaK_code0(fs, jump);
-  luaK_concat(fs, exitlist, fs->pc-1);  /* insert last jump in `exitlist' */
+  luaK_concat(fs, exitlist, prevpos);  /* insert last jump in `exitlist' */
   luaK_patchlist(fs, *golist, luaK_getlabel(fs));
   *golist = NO_JUMP;
 }
@@ -299,15 +298,14 @@ void luaK_goiftrue (FuncState *fs, expdesc *v, int keepvalue) {
 }
 
 
-void luaK_goiffalse (FuncState *fs, expdesc *v, int keepvalue) {
+static void luaK_goiffalse (FuncState *fs, expdesc *v, int keepvalue) {
   luaK_testgo(fs, v, 0, keepvalue ? OP_JMPONT : OP_JMPT);
 }
 
 
 static int code_label (FuncState *fs, OpCode op, int arg) {
-  int j = luaK_getlabel(fs);
-  luaK_code1(fs, op, arg);
-  return j;
+  luaK_getlabel(fs);  /* those instructions may be jump targets */
+  return luaK_code1(fs, op, arg);
 }
 
 
@@ -315,7 +313,6 @@ void luaK_tostack (LexState *ls, expdesc *v, int onlyone) {
   FuncState *fs = ls->fs;
   if (!discharge(fs, v)) {  /* `v' is an expression? */
     OpCode previous = GET_OPCODE(fs->f->code[fs->pc-1]);
-    LUA_ASSERT(L, previous != OP_SETLINE, "bad place to set line");
     if (!ISJUMP(previous) && v->u.l.f == NO_JUMP && v->u.l.t == NO_JUMP) {
       /* expression has no jumps */
       if (onlyone)
@@ -326,14 +323,15 @@ void luaK_tostack (LexState *ls, expdesc *v, int onlyone) {
       int j = NO_JUMP;  /*  eventual  jump over values */
       int p_nil = NO_JUMP;  /* position of an eventual PUSHNIL */
       int p_1 = NO_JUMP;  /* position of an eventual PUSHINT */
-      if (ISJUMP(previous) || need_value(fs, v->u.l.f, OP_JMPONF) ||
-                              need_value(fs, v->u.l.t, OP_JMPONT)) {
+      if (ISJUMP(previous) || need_value(fs, v->u.l.f, OP_JMPONF)
+                           || need_value(fs, v->u.l.t, OP_JMPONT)) {
         /* expression needs values */
         if (ISJUMP(previous))
           luaK_concat(fs, &v->u.l.t, fs->pc-1);  /* put `previous' in t. list */
         else {
-          j = code_label(fs, OP_JMP, 0);  /* to jump over both pushes */
-          luaK_deltastack(fs, -1);  /* next PUSHes may be skipped */
+          j = code_label(fs, OP_JMP, NO_JUMP);  /* to jump over both pushes */
+          /* correct stack for compiler and symbolic execution */
+          luaK_adjuststack(fs, 1);
         }
         p_nil = code_label(fs, OP_PUSHNILJMP, 0);
         p_1 = code_label(fs, OP_PUSHINT, 1);
@@ -348,9 +346,9 @@ void luaK_tostack (LexState *ls, expdesc *v, int onlyone) {
 }
 
 
-void luaK_prefix (LexState *ls, int op, expdesc *v) {
+void luaK_prefix (LexState *ls, UnOpr op, expdesc *v) {
   FuncState *fs = ls->fs;
-  if (op == '-') {
+  if (op == OPR_MINUS) {
     luaK_tostack(ls, v, 1);
     luaK_code0(fs, OP_MINUS);
   }
@@ -368,47 +366,69 @@ void luaK_prefix (LexState *ls, int op, expdesc *v) {
 }
 
 
-void luaK_infix (LexState *ls, int op, expdesc *v) {
+void luaK_infix (LexState *ls, BinOpr op, expdesc *v) {
   FuncState *fs = ls->fs;
-  if (op == TK_AND)
-    luaK_goiftrue(fs, v, 1);
-  else if (op == TK_OR)
-    luaK_goiffalse(fs, v, 1);
-  else
-    luaK_tostack(ls, v, 1);  /* all other binary operators need a value */
+  switch (op) {
+    case OPR_AND:
+      luaK_goiftrue(fs, v, 1);
+      break;
+    case OPR_OR:
+      luaK_goiffalse(fs, v, 1);
+      break;
+    default:
+      luaK_tostack(ls, v, 1);  /* all other binary operators need a value */
+  }
 }
 
 
-void luaK_posfix (LexState *ls, int op, expdesc *v1, expdesc *v2) {
+
+static const struct {
+  OpCode opcode;  /* opcode for each binary operator */
+  int arg;        /* default argument for the opcode */
+} codes[] = {  /* ORDER OPR */
+      {OP_ADD, 0}, {OP_SUB, 0}, {OP_MULT, 0}, {OP_DIV, 0},
+      {OP_POW, 0}, {OP_CONCAT, 2},
+      {OP_JMPNE, NO_JUMP}, {OP_JMPEQ, NO_JUMP},
+      {OP_JMPLT, NO_JUMP}, {OP_JMPLE, NO_JUMP},
+      {OP_JMPGT, NO_JUMP}, {OP_JMPGE, NO_JUMP}
+};
+
+
+void luaK_posfix (LexState *ls, BinOpr op, expdesc *v1, expdesc *v2) {
   FuncState *fs = ls->fs;
-  if (op == TK_AND) {
-    LUA_ASSERT(ls->L, v1->u.l.t == NO_JUMP, "list must be closed");
-    discharge1(fs, v2);
-    v1->u.l.t = v2->u.l.t;
-    luaK_concat(fs, &v1->u.l.f, v2->u.l.f);
-  }
-  else if (op == TK_OR) {
-    LUA_ASSERT(ls->L, v1->u.l.f == NO_JUMP, "list must be closed");
-    discharge1(fs, v2);
-    v1->u.l.f = v2->u.l.f;
-    luaK_concat(fs, &v1->u.l.t, v2->u.l.t);
-  }
-  else {
-    luaK_tostack(ls, v2, 1);  /* `v2' must be a value */
-    switch (op) {
-      case '+': luaK_code0(fs, OP_ADD); break;
-      case '-': luaK_code0(fs, OP_SUB); break;
-      case '*': luaK_code0(fs, OP_MULT); break;
-      case '/': luaK_code0(fs, OP_DIV); break;
-      case '^': luaK_code0(fs, OP_POW); break;
-      case TK_CONCAT: luaK_code1(fs, OP_CONCAT, 2); break;
-      case TK_EQ: luaK_code0(fs, OP_JMPEQ); break;
-      case TK_NE: luaK_code0(fs, OP_JMPNE); break;
-      case '>': luaK_code0(fs, OP_JMPGT); break;
-      case '<': luaK_code0(fs, OP_JMPLT); break;
-      case TK_GE: luaK_code0(fs, OP_JMPGE); break;
-      case TK_LE: luaK_code0(fs, OP_JMPLE); break;
+  switch (op) {
+    case OPR_AND: {
+      LUA_ASSERT(v1->u.l.t == NO_JUMP, "list must be closed");
+      discharge1(fs, v2);
+      v1->u.l.t = v2->u.l.t;
+      luaK_concat(fs, &v1->u.l.f, v2->u.l.f);
+      break;
     }
+    case OPR_OR: {
+      LUA_ASSERT(v1->u.l.f == NO_JUMP, "list must be closed");
+      discharge1(fs, v2);
+      v1->u.l.f = v2->u.l.f;
+      luaK_concat(fs, &v1->u.l.t, v2->u.l.t);
+      break;
+    }
+    default: {
+      luaK_tostack(ls, v2, 1);  /* `v2' must be a value */
+      luaK_code1(fs, codes[op].opcode, codes[op].arg);
+    }
+  }
+}
+
+
+static void codelineinfo (FuncState *fs) {
+  Proto *f = fs->f;
+  LexState *ls = fs->ls;
+  if (ls->lastline > fs->lastline) {
+    luaM_growvector(fs->L, f->lineinfo, f->nlineinfo, 2, int,
+                    "line info overflow", MAX_INT);
+    if (ls->lastline > fs->lastline+1)
+      f->lineinfo[f->nlineinfo++] = -(ls->lastline - (fs->lastline+1));
+    f->lineinfo[f->nlineinfo++] = fs->pc;
+    fs->lastline = ls->lastline;
   }
 }
 
@@ -423,221 +443,259 @@ int luaK_code1 (FuncState *fs, OpCode o, int arg1) {
 }
 
 
-
 int luaK_code2 (FuncState *fs, OpCode o, int arg1, int arg2) {
   Instruction i = previous_instruction(fs);
-  int delta = 0;
-  enum {iO, iU, iS, iAB, iP} mode;  /* instruction format (or iP to optimize) */
-  mode = iP;
-
+  int delta = luaK_opproperties[o].push - luaK_opproperties[o].pop;
+  int optm = 0;  /* 1 when there is an optimization */
   switch (o) {
-
-    case OP_CLOSURE:
+    case OP_CLOSURE: {
       delta = -arg2+1;
-      mode = iAB;
       break;
-
-    case OP_SETLINE:
-      mode = iU;
-      break;
-
-    case OP_CALL:
-      mode = iAB;
-      break;
-
-    case OP_PUSHINT:
-      delta = 1;
-      mode = iS;
-      break;
-
-    case OP_SETTABLE:
+    }
+    case OP_SETTABLE: {
       delta = -arg2;
-      mode = iAB;
       break;
-
-    case OP_SETLIST:
-      delta = -(arg2+1);
-      mode = iAB;
+    }
+    case OP_SETLIST: {
+      if (arg2 == 0) return NO_JUMP;  /* nothing to do */
+      delta = -arg2;
       break;
-
-    case OP_SETMAP:
-      delta = -2*(arg1+1);
-      mode = iU;
+    }
+    case OP_SETMAP: {
+      if (arg1 == 0) return NO_JUMP;  /* nothing to do */
+      delta = -2*arg1;
       break;
-
-    case OP_FORLOOP:
-      delta = -3;
-      arg1 = NO_JUMP;
-      mode = iS;
-      break;
-
-    case OP_SETLOCAL:
-    case OP_SETGLOBAL:
-      delta = -1;
-      mode = iU;
-      break;
-
-    case OP_FORPREP:
-    case OP_JMP:
-      arg1 = NO_JUMP;
-      mode = iS;
-      break;
-
-    case OP_END:
-    case OP_PUSHNILJMP:
-    case OP_NOT:
-      mode = iO;
-      break;
-
-    case OP_PUSHSTRING:
-    case OP_PUSHNUM:
-    case OP_PUSHNEGNUM:
-    case OP_PUSHUPVALUE:
-    case OP_GETLOCAL:
-    case OP_GETGLOBAL:
-    case OP_PUSHSELF:
-    case OP_CREATETABLE:
-      delta = 1;
-      mode = iU;
-      break;
-
-    case OP_JMPLT:
-    case OP_JMPLE:
-    case OP_JMPGT:
-    case OP_JMPGE:
-      delta = -2;
-      arg1 = NO_JUMP;
-      mode = iS;
-      break;
-
-    case OP_MULT:
-    case OP_DIV:
-    case OP_POW:
-      delta = -1;
-      mode = iO;
-      break;
-
-    case OP_RETURN:
+    }
+    case OP_RETURN: {
       if (GET_OPCODE(i) == OP_CALL && GETARG_B(i) == MULT_RET) {
         SET_OPCODE(i, OP_TAILCALL);
         SETARG_B(i, arg1);
+        optm = 1;
       }
-      else mode = iU;
       break;
-
-    case OP_PUSHNIL:
+    }
+    case OP_PUSHNIL: {
+      if (arg1 == 0) return NO_JUMP;  /* nothing to do */
       delta = arg1;
       switch(GET_OPCODE(i)) {
-        case OP_PUSHNIL: SETARG_U(i, GETARG_U(i)+arg1); break;
-        default: mode = iU; break;
+        case OP_PUSHNIL: SETARG_U(i, GETARG_U(i)+arg1); optm = 1; break;
+        default: break;
       }
       break;
-
-    case OP_POP:
+    }
+    case OP_POP: {
+      if (arg1 == 0) return NO_JUMP;  /* nothing to do */
       delta = -arg1;
       switch(GET_OPCODE(i)) {
-        case OP_SETTABLE: SETARG_B(i, GETARG_B(i)+arg1); break;
-        default: mode = iU; break;
+        case OP_SETTABLE: SETARG_B(i, GETARG_B(i)+arg1); optm = 1; break;
+        default: break;
       }
       break;
-
-    case OP_GETTABLE:
-      delta = -1;
+    }
+    case OP_GETTABLE: {
       switch(GET_OPCODE(i)) {
-        case OP_PUSHSTRING: SET_OPCODE(i, OP_GETDOTTED); break;  /* `t.x' */
-        case OP_GETLOCAL: SET_OPCODE(i, OP_GETINDEXED); break;  /* `t[i]' */
-        default: mode = iO; break;
+        case OP_PUSHSTRING:  /* `t.x' */
+          SET_OPCODE(i, OP_GETDOTTED);
+          optm = 1;
+          break;
+        case OP_GETLOCAL:  /* `t[i]' */
+          SET_OPCODE(i, OP_GETINDEXED);
+          optm = 1;
+          break;
+        default: break;
       }
       break;
-
-    case OP_ADD:
-      delta = -1;
+    }
+    case OP_ADD: {
       switch(GET_OPCODE(i)) {
-        case OP_PUSHINT: SET_OPCODE(i, OP_ADDI); break;  /* `a+k' */
-        default: mode = iO; break;
+        case OP_PUSHINT: SET_OPCODE(i, OP_ADDI); optm = 1; break;  /* `a+k' */
+        default: break;
       }
       break;
-
-    case OP_SUB:
-      delta = -1;
+    }
+    case OP_SUB: {
       switch(GET_OPCODE(i)) {
-        case OP_PUSHINT: i = CREATE_S(OP_ADDI, -GETARG_S(i)); break; /* `a-k' */
-        default: mode = iO; break;
+        case OP_PUSHINT:  /* `a-k' */
+          i = CREATE_S(OP_ADDI, -GETARG_S(i));
+          optm = 1;
+          break;
+        default: break;
       }
       break;
-
-    case OP_CONCAT:
+    }
+    case OP_CONCAT: {
       delta = -arg1+1;
       switch(GET_OPCODE(i)) {
-        case OP_CONCAT: SETARG_U(i, GETARG_U(i)+1); break;  /* `a..b..c' */
-        default: mode = iU; break;
+        case OP_CONCAT:  /* `a..b..c' */
+          SETARG_U(i, GETARG_U(i)+1);
+          optm = 1;
+          break;
+        default: break;
       }
       break;
-
-    case OP_MINUS:
+    }
+    case OP_MINUS: {
       switch(GET_OPCODE(i)) {
-        case OP_PUSHINT: SETARG_S(i, -GETARG_S(i)); break;  /* `-k' */
-        case OP_PUSHNUM: SET_OPCODE(i, OP_PUSHNEGNUM); break;  /* `-k' */
-        default: mode = iO; break;
+        case OP_PUSHINT:  /* `-k' */
+          SETARG_S(i, -GETARG_S(i));
+          optm = 1;
+          break;
+        case OP_PUSHNUM:  /* `-k' */
+          SET_OPCODE(i, OP_PUSHNEGNUM);
+          optm = 1;
+          break;
+        default: break;
       }
       break;
-
-    case OP_JMPNE:
-      delta = -2;
-      if (i == CREATE_U(OP_PUSHNIL, 1))  /* `a~=nil' */
+    }
+    case OP_JMPNE: {
+      if (i == CREATE_U(OP_PUSHNIL, 1)) {  /* `a~=nil' */
         i = CREATE_S(OP_JMPT, NO_JUMP);
-      else {
-        arg1 = NO_JUMP;
-        mode = iS;
+        optm = 1;
       }
       break;
-
-    case OP_JMPEQ:
-      delta = -2;
+    }
+    case OP_JMPEQ: {
       if (i == CREATE_U(OP_PUSHNIL, 1)) {  /* `a==nil' */
         i = CREATE_0(OP_NOT);
         delta = -1;  /* just undo effect of previous PUSHNIL */
-      }
-      else {
-        arg1 = NO_JUMP;
-        mode = iS;
+        optm = 1;
       }
       break;
-
+    }
     case OP_JMPT:
-    case OP_JMPF:
-    case OP_JMPONT:
-    case OP_JMPONF:
-      delta = -1;
-      arg1 = NO_JUMP;
+    case OP_JMPONT: {
       switch (GET_OPCODE(i)) {
-        case OP_NOT: i = CREATE_S(invertjump(o), NO_JUMP); break;
-        default: mode = iS; break;
+        case OP_NOT: {
+          i = CREATE_S(OP_JMPF, NO_JUMP);
+          optm = 1;
+          break;
+        }
+        case OP_PUSHINT: {
+          if (o == OP_JMPT) {  /* JMPONT must keep original integer value */
+            i = CREATE_S(OP_JMP, NO_JUMP);
+            optm = 1;
+          }
+          break;
+        }
+        case OP_PUSHNIL: {
+          if (GETARG_U(i) == 1) {
+            fs->pc--;  /* erase previous instruction */
+            luaK_deltastack(fs, -1);  /* correct stack */
+            return NO_JUMP; 
+          }
+          break;
+        }
+        default: break;
       }
       break;
-
+    }
+    case OP_JMPF:
+    case OP_JMPONF: {
+      switch (GET_OPCODE(i)) {
+        case OP_NOT: {
+          i = CREATE_S(OP_JMPT, NO_JUMP);
+          optm = 1;
+          break;
+        }
+        case OP_PUSHINT: {  /* `while 1 do ...' */
+          fs->pc--;  /* erase previous instruction */
+          luaK_deltastack(fs, -1);  /* correct stack */
+          return NO_JUMP; 
+        }
+        case OP_PUSHNIL: {  /* `repeat ... until nil' */
+          if (GETARG_U(i) == 1) {
+            i = CREATE_S(OP_JMP, NO_JUMP);
+            optm = 1;
+          }
+          break;
+        }
+        default: break;
+      }
+      break;
+    }
     case OP_GETDOTTED:
     case OP_GETINDEXED:
     case OP_TAILCALL:
-    case OP_ADDI:
-      LUA_INTERNALERROR(L, "instruction used only for optimizations");
-      return 0;  /* to avoid warnings */
-
+    case OP_ADDI: {
+      LUA_INTERNALERROR("instruction used only for optimizations");
+      break;
+    }
+    default: {
+      LUA_ASSERT(delta != VD, "invalid delta");
+      break;
+    }
   }
   luaK_deltastack(fs, delta);
-  switch (mode) {  /* handle instruction formats */
+  if (optm) {  /* optimize: put instruction in place of last one */
+      fs->f->code[fs->pc-1] = i;  /* change previous instruction */
+      return fs->pc-1;  /* do not generate new instruction */
+  }
+  /* else build new instruction */
+  switch ((enum Mode)luaK_opproperties[o].mode) {
     case iO: i = CREATE_0(o); break;
     case iU: i = CREATE_U(o, arg1); break;
     case iS: i = CREATE_S(o, arg1); break;
     case iAB: i = CREATE_AB(o, arg1, arg2); break;
-    case iP: {  /* optimize: put instruction in place of last one */
-      fs->f->code[fs->pc-1] = i;  /* change previous instruction */
-      return fs->pc-1;
-    }
   }
-  /* actually create the new instruction */
-  luaM_growvector(fs->L, fs->f->code, fs->pc, 1, Instruction, codeEM, MAX_INT);
+  codelineinfo(fs);
+  /* put new instruction in code array */
+  luaM_growvector(fs->L, fs->f->code, fs->pc, 1, Instruction,
+                  "code size overflow", MAX_INT);
   fs->f->code[fs->pc] = i;
   return fs->pc++;
 }
 
+
+const struct OpProperties luaK_opproperties[NUM_OPCODES] = {
+  {iO, 0, 0},	/* OP_END */
+  {iU, 0, 0},	/* OP_RETURN */
+  {iAB, 0, 0},	/* OP_CALL */
+  {iAB, 0, 0},	/* OP_TAILCALL */
+  {iU, VD, 0},	/* OP_PUSHNIL */
+  {iU, VD, 0},	/* OP_POP */
+  {iS, 1, 0},	/* OP_PUSHINT */
+  {iU, 1, 0},	/* OP_PUSHSTRING */
+  {iU, 1, 0},	/* OP_PUSHNUM */
+  {iU, 1, 0},	/* OP_PUSHNEGNUM */
+  {iU, 1, 0},	/* OP_PUSHUPVALUE */
+  {iU, 1, 0},	/* OP_GETLOCAL */
+  {iU, 1, 0},	/* OP_GETGLOBAL */
+  {iO, 1, 2},	/* OP_GETTABLE */
+  {iU, 1, 1},	/* OP_GETDOTTED */
+  {iU, 1, 1},	/* OP_GETINDEXED */
+  {iU, 2, 1},	/* OP_PUSHSELF */
+  {iU, 1, 0},	/* OP_CREATETABLE */
+  {iU, 0, 1},	/* OP_SETLOCAL */
+  {iU, 0, 1},	/* OP_SETGLOBAL */
+  {iAB, VD, 0},	/* OP_SETTABLE */
+  {iAB, VD, 0},	/* OP_SETLIST */
+  {iU, VD, 0},	/* OP_SETMAP */
+  {iO, 1, 2},	/* OP_ADD */
+  {iS, 1, 1},	/* OP_ADDI */
+  {iO, 1, 2},	/* OP_SUB */
+  {iO, 1, 2},	/* OP_MULT */
+  {iO, 1, 2},	/* OP_DIV */
+  {iO, 1, 2},	/* OP_POW */
+  {iU, VD, 0},	/* OP_CONCAT */
+  {iO, 1, 1},	/* OP_MINUS */
+  {iO, 1, 1},	/* OP_NOT */
+  {iS, 0, 2},	/* OP_JMPNE */
+  {iS, 0, 2},	/* OP_JMPEQ */
+  {iS, 0, 2},	/* OP_JMPLT */
+  {iS, 0, 2},	/* OP_JMPLE */
+  {iS, 0, 2},	/* OP_JMPGT */
+  {iS, 0, 2},	/* OP_JMPGE */
+  {iS, 0, 1},	/* OP_JMPT */
+  {iS, 0, 1},	/* OP_JMPF */
+  {iS, 0, 1},	/* OP_JMPONT */
+  {iS, 0, 1},	/* OP_JMPONF */
+  {iS, 0, 0},	/* OP_JMP */
+  {iO, 0, 0},	/* OP_PUSHNILJMP */
+  {iS, 0, 0},	/* OP_FORPREP */
+  {iS, 0, 3},	/* OP_FORLOOP */
+  {iS, 2, 0},	/* OP_LFORPREP */
+  {iS, 0, 3},	/* OP_LFORLOOP */
+  {iAB, VD, 0}	/* OP_CLOSURE */
+};
+

lcode.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lcode.h,v 1.11 2000/04/07 19:35:20 roberto Exp roberto $
+** $Id: lcode.h,v 1.15 2000/06/28 20:20:36 roberto Exp roberto $
 ** Code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -20,6 +20,31 @@
 #define NO_JUMP (-1)
 
 
+/*
+** grep "ORDER OPR" if you change these enums
+*/
+typedef enum BinOpr {
+  OPR_ADD, OPR_SUB, OPR_MULT, OPR_DIV, OPR_POW,
+  OPR_CONCAT,
+  OPR_NE, OPR_EQ, OPR_LT, OPR_LE, OPR_GT, OPR_GE,
+  OPR_AND, OPR_OR,
+  OPR_NOBINOPR
+} BinOpr;
+
+typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_NOUNOPR } UnOpr;
+
+
+enum Mode {iO, iU, iS, iAB};  /* instruction format */
+
+#define VD	100	/* flag for variable delta */
+
+extern const struct OpProperties {
+  char mode;
+  unsigned char push;
+  unsigned char pop;
+} luaK_opproperties[];
+
+
 void luaK_error (LexState *ls, const char *msg);
 int luaK_code0 (FuncState *fs, OpCode o);
 int luaK_code1 (FuncState *fs, OpCode o, int arg1);
@@ -28,7 +53,6 @@ int luaK_jump (FuncState *fs);
 void luaK_patchlist (FuncState *fs, int list, int target);
 void luaK_concat (FuncState *fs, int *l1, int l2);
 void luaK_goiftrue (FuncState *fs, expdesc *v, int keepvalue);
-void luaK_goiffalse (FuncState *fs, expdesc *v, int keepvalue);
 int luaK_getlabel (FuncState *fs);
 void luaK_deltastack (FuncState *fs, int delta);
 void luaK_kstr (LexState *ls, int c);
@@ -38,9 +62,9 @@ int luaK_lastisopen (FuncState *fs);
 void luaK_setcallreturns (FuncState *fs, int nresults);
 void luaK_tostack (LexState *ls, expdesc *v, int onlyone);
 void luaK_storevar (LexState *ls, const expdesc *var);
-void luaK_prefix (LexState *ls, int op, expdesc *v);
-void luaK_infix (LexState *ls, int op, expdesc *v);
-void luaK_posfix (LexState *ls, int op, expdesc *v1, expdesc *v2);
+void luaK_prefix (LexState *ls, UnOpr op, expdesc *v);
+void luaK_infix (LexState *ls, BinOpr op, expdesc *v);
+void luaK_posfix (LexState *ls, BinOpr op, expdesc *v1, expdesc *v2);
 
 
 #endif

ldblib.c

@@ -1,176 +1,188 @@
 /*
-** $Id: ldblib.c,v 1.12 2000/03/30 17:19:48 roberto Exp roberto $
+** $Id: ldblib.c,v 1.28 2000/11/06 13:19:08 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
 
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lauxlib.h"
-#include "lua.h"
 #include "luadebug.h"
 #include "lualib.h"
 
 
 
-static void settabss (lua_State *L, lua_Object t, const char *i, const char *v) {
-  lua_pushobject(L, t);
+static void settabss (lua_State *L, const char *i, const char *v) {
   lua_pushstring(L, i);
   lua_pushstring(L, v);
-  lua_settable(L);
+  lua_settable(L, -3);
 }
 
 
-static void settabsi (lua_State *L, lua_Object t, const char *i, int v) {
-  lua_pushobject(L, t);
+static void settabsi (lua_State *L, const char *i, int v) {
   lua_pushstring(L, i);
   lua_pushnumber(L, v);
-  lua_settable(L);
+  lua_settable(L, -3);
 }
 
 
-static void settabso (lua_State *L, lua_Object t, const char *i, lua_Object v) {
-  lua_pushobject(L, t);
-  lua_pushstring(L, i);
-  lua_pushobject(L, v);
-  lua_settable(L);
-}
-
-
-static void getstack (lua_State *L) {
+static int getinfo (lua_State *L) {
   lua_Debug ar;
-  if (!lua_getstack(L, luaL_check_int(L, 1), &ar))  /* level out of range? */
-    return;
-  else {
-    const char *options = luaL_check_string(L, 2);
-    lua_Object res = lua_createtable(L);
-    if (!lua_getinfo(L, options, &ar))
-      luaL_argerror(L, 2, "invalid option");
-    for (; *options; options++) {
-      switch (*options) {
-        case 'S':
-          settabss(L, res, "source", ar.source);
-          settabsi(L, res, "linedefined", ar.linedefined);
-          settabss(L, res, "what", ar.what);
-          break;
-        case 'l':
-          settabsi(L, res, "currentline", ar.currentline);
-          break;
-        case 'u':
-          settabsi(L, res, "nups", ar.nups);
-          break;
-        case 'n':
-          settabss(L, res, "name", ar.name);
-          settabss(L, res, "namewhat", ar.namewhat);
-          break;
-        case 'f':
-          settabso(L, res, "func", ar.func);
-          break;
-
-      }
+  const char *options = luaL_opt_string(L, 2, "flnSu");
+  char buff[20];
+  if (lua_isnumber(L, 1)) {
+    if (!lua_getstack(L, (int)lua_tonumber(L, 1), &ar)) {
+      lua_pushnil(L);  /* level out of range */
+      return 1;
     }
-    lua_pushobject(L, res);
   }
+  else if (lua_isfunction(L, 1)) {
+    lua_pushvalue(L, 1);
+    sprintf(buff, ">%.10s", options);
+    options = buff;
+  }
+  else
+    luaL_argerror(L, 1, "function or level expected");
+  if (!lua_getinfo(L, options, &ar))
+    luaL_argerror(L, 2, "invalid option");
+  lua_newtable(L);
+  for (; *options; options++) {
+    switch (*options) {
+      case 'S':
+        settabss(L, "source", ar.source);
+        if (ar.source)
+          settabss(L, "short_src", ar.short_src);
+        settabsi(L, "linedefined", ar.linedefined);
+        settabss(L, "what", ar.what);
+        break;
+      case 'l':
+        settabsi(L, "currentline", ar.currentline);
+        break;
+      case 'u':
+        settabsi(L, "nups", ar.nups);
+        break;
+      case 'n':
+        settabss(L, "name", ar.name);
+        settabss(L, "namewhat", ar.namewhat);
+        break;
+      case 'f':
+        lua_pushstring(L, "func");
+        lua_pushvalue(L, -3);
+        lua_settable(L, -3);
+        break;
+    }
+  }
+  return 1;  /* return table */
 }
     
 
-static void getlocal (lua_State *L) {
+static int getlocal (lua_State *L) {
   lua_Debug ar;
-  lua_Localvar lvar;
+  const char *name;
   if (!lua_getstack(L, luaL_check_int(L, 1), &ar))  /* level out of range? */
     luaL_argerror(L, 1, "level out of range");
-  lvar.index = luaL_check_int(L, 2);
-  if (lua_getlocal(L, &ar, &lvar)) {
-    lua_pushstring(L, lvar.name);
-    lua_pushobject(L, lvar.value);
+  name = lua_getlocal(L, &ar, luaL_check_int(L, 2));
+  if (name) {
+    lua_pushstring(L, name);
+    lua_pushvalue(L, -2);
+    return 2;
+  }
+  else {
+    lua_pushnil(L);
+    return 1;
   }
-  else lua_pushnil(L);
 }
 
 
-static void setlocal (lua_State *L) {
+static int setlocal (lua_State *L) {
   lua_Debug ar;
-  lua_Localvar lvar;
   if (!lua_getstack(L, luaL_check_int(L, 1), &ar))  /* level out of range? */
     luaL_argerror(L, 1, "level out of range");
-  lvar.index = luaL_check_int(L, 2);
-  lvar.value = luaL_nonnullarg(L, 3);
-  if (lua_setlocal(L, &ar, &lvar))
-    lua_pushstring(L, lvar.name);
-  else lua_pushnil(L);
+  luaL_checkany(L, 3);
+  lua_pushstring(L, lua_setlocal(L, &ar, luaL_check_int(L, 2)));
+  return 1;
 }
 
 
-/*
-** 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 */
+/* dummy variables (to define unique addresses) */
+static char key1, key2;
+#define KEY_CALLHOOK	(&key1)
+#define KEY_LINEHOOK	(&key2)
 
 
-
-static void linef (lua_State *L, lua_Debug *ar) {
-  if (linehook != LUA_NOREF) {
-    lua_pushnumber(L, ar->currentline);
-    lua_callfunction(L, lua_getref(L, linehook));
+static void hookf (lua_State *L, void *key) {
+  lua_getregistry(L);
+  lua_pushuserdata(L, key);
+  lua_gettable(L, -2);
+  if (lua_isfunction(L, -1)) {
+    lua_pushvalue(L, 1);
+    lua_rawcall(L, 1, 0);
   }
+  else
+    lua_pop(L, 1);  /* pop result from gettable */
+  lua_pop(L, 1);  /* pop table */
 }
 
 
 static void callf (lua_State *L, lua_Debug *ar) {
-  if (callhook != LUA_NOREF) {
-    lua_pushstring(L, ar->event);
-    lua_callfunction(L, lua_getref(L, callhook));
-  }
+  lua_pushstring(L, ar->event);
+  hookf(L, KEY_CALLHOOK);
 }
 
 
-static void setcallhook (lua_State *L) {
-  lua_Object f = lua_getparam(L, 1);
-  lua_unref(L, callhook);
-  if (f == LUA_NOOBJECT) {
-    callhook = LUA_NOREF;
-    lua_setcallhook(L, NULL);
-  }
-  else {
-    lua_pushobject(L, f);
-    callhook = lua_ref(L, 1);
-    lua_setcallhook(L, callf);
-  }
+static void linef (lua_State *L, lua_Debug *ar) {
+  lua_pushnumber(L, ar->currentline);
+  hookf(L, KEY_LINEHOOK);
 }
 
 
-static void setlinehook (lua_State *L) {
-  lua_Object f = lua_getparam(L, 1);
-  lua_unref(L, linehook);
-  if (f == LUA_NOOBJECT) {
-    linehook = LUA_NOREF;
-    lua_setlinehook(L, NULL);
-  }
-  else {
-    lua_pushobject(L, f);
-    linehook = lua_ref(L, 1);
-    lua_setlinehook(L, linef);
-  }
+static void sethook (lua_State *L, void *key, lua_Hook hook,
+                     lua_Hook (*sethookf)(lua_State * L, lua_Hook h)) {
+  lua_settop(L, 1);
+  if (lua_isnil(L, 1))
+    (*sethookf)(L, NULL);
+  else if (lua_isfunction(L, 1))
+    (*sethookf)(L, hook);
+  else
+    luaL_argerror(L, 1, "function expected");
+  lua_getregistry(L);
+  lua_pushuserdata(L, key);
+  lua_pushvalue(L, -1);  /* dup key */
+  lua_gettable(L, -3);   /* get old value */
+  lua_pushvalue(L, -2);  /* key (again) */
+  lua_pushvalue(L, 1);
+  lua_settable(L, -5);  /* set new value */
+}
+
+
+static int setcallhook (lua_State *L) {
+  sethook(L, KEY_CALLHOOK, callf, lua_setcallhook);
+  return 1;
+}
+
+
+static int setlinehook (lua_State *L) {
+  sethook(L, KEY_LINEHOOK, linef, lua_setlinehook);
+  return 1;
 }
 
 
 static const struct luaL_reg dblib[] = {
   {"getlocal", getlocal},
-  {"getstack", getstack},
+  {"getinfo", getinfo},
   {"setcallhook", setcallhook},
   {"setlinehook", setlinehook},
   {"setlocal", setlocal}
 };
 
 
-void lua_dblibopen (lua_State *L) {
+LUALIB_API void lua_dblibopen (lua_State *L) {
   luaL_openl(L, dblib);
 }
 

ldebug.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldebug.c,v 1.15 2000/03/30 17:19:48 roberto Exp roberto $
+** $Id: ldebug.c,v 1.49 2000/10/27 11:39:52 roberto Exp roberto $
 ** Debug Interface
 ** See Copyright Notice in lua.h
 */
@@ -7,64 +7,57 @@
 
 #include <stdlib.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lapi.h"
-#include "lauxlib.h"
+#include "lcode.h"
 #include "ldebug.h"
 #include "ldo.h"
 #include "lfunc.h"
 #include "lobject.h"
+#include "lopcodes.h"
 #include "lstate.h"
+#include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
-#include "lua.h"
 #include "luadebug.h"
 
 
-static const lua_Type normtype[] = {  /* ORDER LUA_T */
-  TAG_USERDATA, TAG_NUMBER, TAG_STRING, TAG_TABLE,
-  TAG_LCLOSURE, TAG_CCLOSURE, TAG_NIL,
-  TAG_LCLOSURE, TAG_CCLOSURE   /* TAG_LMARK, TAG_CMARK */
-};
+
+static const char *getfuncname (lua_State *L, StkId f, const char **name);
 
 
 static void setnormalized (TObject *d, const TObject *s) {
-  d->value = s->value;
-  d->ttype = normtype[ttype(s)];
+  if (ttype(s) == LUA_TMARK) {
+    clvalue(d) = infovalue(s)->func;
+    ttype(d) = LUA_TFUNCTION;
+  }
+  else *d = *s;
 }
 
 
-
-static int hasdebuginfo (lua_State *L, StkId f) {
-  return (f+1 < L->top && (f+1)->ttype == TAG_LINE);
+static int isLmark (StkId o) {
+  return (o && ttype(o) == LUA_TMARK && !infovalue(o)->func->isC);
 }
 
 
-lua_Hook lua_setcallhook (lua_State *L, lua_Hook func) {
+LUA_API lua_Hook lua_setcallhook (lua_State *L, lua_Hook func) {
   lua_Hook oldhook = L->callhook;
   L->callhook = func;
   return oldhook;
 }
 
 
-lua_Hook lua_setlinehook (lua_State *L, lua_Hook func) {
+LUA_API lua_Hook lua_setlinehook (lua_State *L, lua_Hook func) {
   lua_Hook oldhook = L->linehook;
   L->linehook = func;
   return oldhook;
 }
 
 
-int lua_setdebug (lua_State *L, int debug) {
-  int old = L->debug;
-  L->debug = debug;
-  return old;
-}
-
-
 static StkId aux_stackedfunction (lua_State *L, int level, StkId top) {
   int i;
-  for (i = (top-1)-L->stack; i>=0; i--) {
+  for (i = (top-1) - L->stack; i>=0; i--) {
     if (is_T_MARK(L->stack[i].ttype)) {
       if (level == 0)
         return L->stack+i;
@@ -75,7 +68,7 @@ static StkId aux_stackedfunction (lua_State *L, int level, StkId top) {
 }
 
 
-int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
   StkId f = aux_stackedfunction(L, level, L->top);
   if (f == NULL) return 0;  /* there is no such level */
   else {
@@ -85,137 +78,389 @@ int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
 }
 
 
-static int lua_nups (StkId f) {
+static int nups (StkId f) {
   switch (ttype(f)) {
-    case TAG_LCLOSURE:  case TAG_CCLOSURE:
-    case TAG_LMARK:   case TAG_CMARK:
-      return f->value.cl->nelems;
+    case LUA_TFUNCTION:
+      return clvalue(f)->nupvalues;
+    case LUA_TMARK:
+      return infovalue(f)->func->nupvalues;
     default:
       return 0;
   }
 }
 
 
-static int lua_currentline (lua_State *L, StkId f) {
-  return hasdebuginfo(L, f) ? (f+1)->value.i : -1;
+int luaG_getline (int *lineinfo, int pc, int refline, int *prefi) {
+  int refi;
+  if (lineinfo == NULL || pc == -1)
+    return -1;  /* no line info or function is not active */
+  refi = prefi ? *prefi : 0;
+  if (lineinfo[refi] < 0)
+    refline += -lineinfo[refi++]; 
+  LUA_ASSERT(lineinfo[refi] >= 0, "invalid line info");
+  while (lineinfo[refi] > pc) {
+    refline--;
+    refi--;
+    if (lineinfo[refi] < 0)
+      refline -= -lineinfo[refi--]; 
+    LUA_ASSERT(lineinfo[refi] >= 0, "invalid line info");
+  }
+  for (;;) {
+    int nextline = refline + 1;
+    int nextref = refi + 1;
+    if (lineinfo[nextref] < 0)
+      nextline += -lineinfo[nextref++]; 
+    LUA_ASSERT(lineinfo[nextref] >= 0, "invalid line info");
+    if (lineinfo[nextref] > pc)
+      break;
+    refline = nextline;
+    refi = nextref;
+  }
+  if (prefi) *prefi = refi;
+  return refline;
 }
 
 
+static int currentpc (StkId f) {
+  CallInfo *ci = infovalue(f);
+  LUA_ASSERT(isLmark(f), "function has no pc");
+  if (ci->pc)
+    return (*ci->pc - ci->func->f.l->code) - 1;
+  else
+    return -1;  /* function is not active */
+}
+
+
+static int currentline (StkId f) {
+  if (!isLmark(f))
+    return -1;  /* only active lua functions have current-line information */
+  else {
+    CallInfo *ci = infovalue(f);
+    int *lineinfo = ci->func->f.l->lineinfo;
+    return luaG_getline(lineinfo, currentpc(f), 1, NULL);
+  }
+}
+
+
+
 static Proto *getluaproto (StkId f) {
-  return (ttype(f) == TAG_LMARK) ?  clvalue(f)->f.l : NULL;
+  return (isLmark(f) ?  infovalue(f)->func->f.l : NULL);
 }
 
 
-int lua_getlocal (lua_State *L, const lua_Debug *ar, lua_Localvar *v) {
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
   StkId f = ar->_func;
   Proto *fp = getluaproto(f);
-  if (!fp) return 0;  /* `f' is not a Lua function? */
-  v->name = luaF_getlocalname(fp, v->index, lua_currentline(L, f));
-  if (!v->name) return 0;
-  /* if `name', there must be a TAG_LINE */
-  /* therefore, f+2 points to function base */
-  LUA_ASSERT(L, ttype(f+1) == TAG_LINE, "");
-  v->value = luaA_putluaObject(L, (f+2)+(v->index-1));
-  return 1;
+  if (!fp) return NULL;  /* `f' is not a Lua function? */
+  name = luaF_getlocalname(fp, n, currentpc(f));
+  if (!name) return NULL;
+  luaA_pushobject(L, (f+1)+(n-1));  /* push value */
+  return name;
 }
 
 
-int lua_setlocal (lua_State *L, const lua_Debug *ar, lua_Localvar *v) {
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
+  const char *name;
   StkId f = ar->_func;
   Proto *fp = getluaproto(f);
-  if (!fp) return 0;  /* `f' is not a Lua function? */
-  v->name = luaF_getlocalname(fp, v->index, lua_currentline(L, f));
-  if (!v->name) return 0;
-  LUA_ASSERT(L, ttype(f+1) == TAG_LINE, "");
-  *((f+2)+(v->index-1)) = *v->value;
-  return 1;
+  L->top--;  /* pop new value */
+  if (!fp) return NULL;  /* `f' is not a Lua function? */
+  name = luaF_getlocalname(fp, n, currentpc(f));
+  if (!name || name[0] == '(') return NULL;  /* `(' starts private locals */
+  *((f+1)+(n-1)) = *L->top;
+  return name;
 }
 
 
-static void lua_funcinfo (lua_Debug *ar) {
-  StkId func = ar->_func;
+static void infoLproto (lua_Debug *ar, Proto *f) {
+  ar->source = f->source->str;
+  ar->linedefined = f->lineDefined;
+  ar->what = "Lua";
+}
+
+
+static void funcinfo (lua_State *L, lua_Debug *ar, StkId func) {
+  Closure *cl = NULL;
   switch (ttype(func)) {
-    case TAG_LCLOSURE:  case TAG_LMARK:
-      ar->source = clvalue(func)->f.l->source->str;
-      ar->linedefined = clvalue(func)->f.l->lineDefined;
-      ar->what = "Lua";
+    case LUA_TFUNCTION:
+      cl = clvalue(func);
       break;
-    case TAG_CCLOSURE:  case TAG_CMARK:
-      ar->source = "(C)";
-      ar->linedefined = -1;
-      ar->what = "C";
+    case LUA_TMARK:
+      cl = infovalue(func)->func;
       break;
     default:
-      LUA_INTERNALERROR(L, "invalid `func' value");
+      lua_error(L, "value for `lua_getinfo' is not a function");
   }
+  if (cl->isC) {
+    ar->source = "=C";
+    ar->linedefined = -1;
+    ar->what = "C";
+  }
+  else
+    infoLproto(ar, cl->f.l);
+  luaO_chunkid(ar->short_src, ar->source, sizeof(ar->short_src));
   if (ar->linedefined == 0)
     ar->what = "main";
 }
 
 
-static int checkfunc (lua_State *L, TObject *o) {
-  return luaO_equalObj(o, L->top);
+static const char *travtagmethods (lua_State *L, const TObject *o) {
+  if (ttype(o) == LUA_TFUNCTION) {
+    int e;
+    for (e=0; e<TM_N; e++) {
+      int t;
+      for (t=0; t<=L->last_tag; t++)
+        if (clvalue(o) == luaT_gettm(L, t, e))
+          return luaT_eventname[e];
+    }
+  }
+  return NULL;
 }
 
 
-static void lua_getobjname (lua_State *L, StkId f, lua_Debug *ar) {
-  GlobalVar *g;
-  /* try to find a name for given function */
-  setnormalized(L->top, f); /* to be used by `checkfunc' */
-  for (g=L->rootglobal; g; g=g->next) {
-    if (checkfunc(L, &g->value)) {
-      ar->name = g->name->str;
-      ar->namewhat = "global";
-      return;
-    }
+static const char *travglobals (lua_State *L, const TObject *o) {
+  Hash *g = L->gt;
+  int i;
+  for (i=0; i<g->size; i++) {
+    if (luaO_equalObj(o, val(node(g, i))) &&
+        ttype(key(node(g, i))) == LUA_TSTRING) 
+      return tsvalue(key(node(g, i)))->str;
   }
+  return NULL;
+}
+
+
+static void getname (lua_State *L, StkId f, lua_Debug *ar) {
+  TObject o;
+  setnormalized(&o, f);
+  /* try to find a name for given function */
+  if ((ar->name = travglobals(L, &o)) != NULL)
+    ar->namewhat = "global";
   /* not found: try tag methods */
-  if ((ar->name = luaT_travtagmethods(L, checkfunc)) != NULL)
+  else if ((ar->name = travtagmethods(L, &o)) != NULL)
     ar->namewhat = "tag-method";
   else ar->namewhat = "";  /* not found at all */
 }
 
 
-int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
-  StkId func = ar->_func;
-  LUA_ASSERT(L, is_T_MARK(ttype(func)), "invalid activation record");
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
+  StkId func;
+  int isactive = (*what != '>');
+  if (isactive)
+    func = ar->_func;
+  else {
+    what++;  /* skip the '>' */
+    func = L->top - 1;
+  }
   for (; *what; what++) {
     switch (*what) {
-      case 'S':
-        lua_funcinfo(ar);
+      case 'S': {
+        funcinfo(L, ar, func);
         break;
-      case 'l':
-        ar->currentline = lua_currentline(L, func);
+      }
+      case 'l': {
+        ar->currentline = currentline(func);
         break;
-      case 'u':
-        ar->nups = lua_nups(func);
+      }
+      case 'u': {
+        ar->nups = nups(func);
         break;
-      case 'n':
-        lua_getobjname(L, func, ar);
+      }
+      case 'n': {
+        ar->namewhat = (isactive) ? getfuncname(L, func, &ar->name) : NULL;
+        if (ar->namewhat == NULL)
+          getname(L, func, ar);
         break;
-      case 'f':
+      }
+      case 'f': {
         setnormalized(L->top, func);
-        incr_top;
-        ar->func = luaA_putObjectOnTop(L);
+        incr_top;  /* push function */
         break;
+      }
       default: return 0;  /* invalid option */
     }
   }
+  if (!isactive) L->top--;  /* pop function */
   return 1;
 }
 
 
+/*
+** {======================================================
+** Symbolic Execution
+** =======================================================
+*/
 
-static void call_index_error (lua_State *L, TObject *o, const char *v) {
-  luaL_verror(L, "attempt to %.10s a %.10s value", v, lua_type(L, o));
+
+static int pushpc (int *stack, int pc, int top, int n) {
+  while (n--)
+    stack[top++] = pc-1;
+  return top;
 }
 
 
-void luaG_callerror (lua_State *L, TObject *func) {
-  call_index_error(L, func, "call");
+static Instruction luaG_symbexec (const Proto *pt, int lastpc, int stackpos) {
+  int stack[MAXSTACK];  /* stores last instruction that changed a stack entry */
+  const Instruction *code = pt->code;
+  int top = pt->numparams;
+  int pc = 0;
+  if (pt->is_vararg)  /* varargs? */
+    top++;  /* `arg' */
+  while (pc < lastpc) {
+    const Instruction i = code[pc++];
+    LUA_ASSERT(0 <= top && top <= pt->maxstacksize, "wrong stack");
+    switch (GET_OPCODE(i)) {
+      case OP_RETURN: {
+        LUA_ASSERT(top >= GETARG_U(i), "wrong stack");
+        top = GETARG_U(i);
+        break;
+      }
+      case OP_TAILCALL: {
+        LUA_ASSERT(top >= GETARG_A(i), "wrong stack");
+        top = GETARG_B(i);
+        break;
+      }
+      case OP_CALL: {
+        int nresults = GETARG_B(i);
+        if (nresults == MULT_RET) nresults = 1;
+        LUA_ASSERT(top >= GETARG_A(i), "wrong stack");
+        top = pushpc(stack, pc, GETARG_A(i), nresults);
+        break;
+      }
+      case OP_PUSHNIL: {
+        top = pushpc(stack, pc, top, GETARG_U(i));
+        break;
+      }
+      case OP_POP: {
+        top -= GETARG_U(i);
+        break;
+      }
+      case OP_SETTABLE:
+      case OP_SETLIST: {
+        top -= GETARG_B(i);
+        break;
+      }
+      case OP_SETMAP: {
+        top -= 2*GETARG_U(i);
+        break;
+      }
+      case OP_CONCAT: {
+        top -= GETARG_U(i);
+        stack[top++] = pc-1;
+        break;
+      }
+      case OP_CLOSURE: {
+        top -= GETARG_B(i);
+        stack[top++] = pc-1;
+        break;
+      }
+      case OP_JMPONT:
+      case OP_JMPONF: {
+        int newpc = pc + GETARG_S(i);
+        /* jump is forward and do not skip `lastpc'? */
+        if (pc < newpc && newpc <= lastpc) {
+          stack[top-1] = pc-1;  /* value comes from `and'/`or' */
+          pc = newpc;  /* do the jump */
+        }
+        else
+          top--;  /* do not jump; pop value */
+        break;
+      }
+      default: {
+        OpCode op = GET_OPCODE(i);
+        LUA_ASSERT(luaK_opproperties[op].push != VD,
+                   "invalid opcode for default");
+        top -= luaK_opproperties[op].pop;
+        LUA_ASSERT(top >= 0, "wrong stack");
+        top = pushpc(stack, pc, top, luaK_opproperties[op].push);
+      }
+    }
+  }
+  return code[stack[stackpos]];
 }
 
 
-void luaG_indexerror (lua_State *L, TObject *t) {
-  call_index_error(L, t, "index");
+static const char *getobjname (lua_State *L, StkId obj, const char **name) {
+  StkId func = aux_stackedfunction(L, 0, obj);
+  if (!isLmark(func))
+    return NULL;  /* not an active Lua function */
+  else {
+    Proto *p = infovalue(func)->func->f.l;
+    int pc = currentpc(func);
+    int stackpos = obj - (func+1);  /* func+1 == function base */
+    Instruction i = luaG_symbexec(p, pc, stackpos);
+    LUA_ASSERT(pc != -1, "function must be active");
+    switch (GET_OPCODE(i)) {
+      case OP_GETGLOBAL: {
+        *name = p->kstr[GETARG_U(i)]->str;
+        return "global";
+      }
+      case OP_GETLOCAL: {
+        *name = luaF_getlocalname(p, GETARG_U(i)+1, pc);
+        LUA_ASSERT(*name, "local must exist");
+        return "local";
+      }
+      case OP_PUSHSELF:
+      case OP_GETDOTTED: {
+        *name = p->kstr[GETARG_U(i)]->str;
+        return "field";
+      }
+      default:
+        return NULL;  /* no useful name found */
+    }
+  }
 }
+
+
+static const char *getfuncname (lua_State *L, StkId f, const char **name) {
+  StkId func = aux_stackedfunction(L, 0, f);  /* calling function */
+  if (!isLmark(func))
+    return NULL;  /* not an active Lua function */
+  else {
+    Proto *p = infovalue(func)->func->f.l;
+    int pc = currentpc(func);
+    Instruction i;
+    if (pc == -1) return NULL;  /* function is not activated */
+    i = p->code[pc];
+    switch (GET_OPCODE(i)) {
+      case OP_CALL: case OP_TAILCALL:
+        return getobjname(L, (func+1)+GETARG_A(i), name);
+      default:
+        return NULL;  /* no useful name found */
+    }
+  }
+}
+
+
+/* }====================================================== */
+
+
+void luaG_typeerror (lua_State *L, StkId o, const char *op) {
+  const char *name;
+  const char *kind = getobjname(L, o, &name);
+  const char *t = luaO_typename(o);
+  if (kind)
+    luaO_verror(L, "attempt to %.30s %.20s `%.40s' (a %.10s value)",
+                op, kind, name, t);
+  else
+    luaO_verror(L, "attempt to %.30s a %.10s value", op, t);
+}
+
+
+void luaG_binerror (lua_State *L, StkId p1, int t, const char *op) {
+  if (ttype(p1) == t) p1++;
+  LUA_ASSERT(ttype(p1) != t, "must be an error");
+  luaG_typeerror(L, p1, op);
+}
+
+
+void luaG_ordererror (lua_State *L, StkId top) {
+  const char *t1 = luaO_typename(top-2);
+  const char *t2 = luaO_typename(top-1);
+  if (t1[2] == t2[2])
+    luaO_verror(L, "attempt to compare two %.10s values", t1);
+  else
+    luaO_verror(L, "attempt to compare %.10s with %.10s", t1, t2);
+}
+

ldebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: $
+** $Id: ldebug.h,v 1.6 2000/10/02 20:10:55 roberto Exp roberto $
 ** Auxiliary functions from Debug Interface module
 ** See Copyright Notice in lua.h
 */
@@ -8,12 +8,14 @@
 #define ldebug_h
 
 
-#include "lobject.h"
+#include "lstate.h"
 #include "luadebug.h"
 
 
-void luaG_callerror (lua_State *L, TObject *func);
-void luaG_indexerror (lua_State *L, TObject *t);
+void luaG_typeerror (lua_State *L, StkId o, const char *op);
+void luaG_binerror (lua_State *L, StkId p1, int t, const char *op);
+int luaG_getline (int *lineinfo, int pc, int refline, int *refi);
+void luaG_ordererror (lua_State *L, StkId top);
 
 
 #endif

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.72 2000/03/30 20:55:50 roberto Exp roberto $
+** $Id: ldo.c,v 1.108 2000/10/20 16:39:03 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -10,9 +10,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
-#include "lauxlib.h"
 #include "ldebug.h"
 #include "ldo.h"
 #include "lgc.h"
@@ -21,56 +20,43 @@
 #include "lparser.h"
 #include "lstate.h"
 #include "lstring.h"
+#include "ltable.h"
 #include "ltm.h"
-#include "lua.h"
-#include "luadebug.h"
 #include "lundump.h"
 #include "lvm.h"
 #include "lzio.h"
 
 
-#define EXTRA_STACK	32	/* space to handle stack overflow errors */
-
-/*
-** typical numer of stack slots used by a (big) function
-** (this constant is used only for choosing error messages)
-*/
-#define SLOTS_PER_F	20
+/* space to handle stack overflow errors */
+#define EXTRA_STACK	(2*LUA_MINSTACK)
 
 
 void luaD_init (lua_State *L, int stacksize) {
   L->stack = luaM_newvector(L, stacksize+EXTRA_STACK, TObject);
+  L->nblocks += stacksize*sizeof(TObject);
   L->stack_last = L->stack+(stacksize-1);
   L->stacksize = stacksize;
-  L->Cstack.base = L->Cstack.lua2C = L->top = L->stack;
-  L->Cstack.num = 0;
+  L->Cbase = L->top = L->stack;
 }
 
 
 void luaD_checkstack (lua_State *L, int n) {
-  if (L->stack_last-L->top <= n) {  /* stack overflow? */
+  if (L->stack_last - L->top <= n) {  /* stack overflow? */
     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!");
+      /* overflow while handling overflow */
+      luaD_breakrun(L, LUA_ERRERR);  /* break run without error message */
     }
     else {
-      lua_Debug dummy;
       L->stack_last += EXTRA_STACK;  /* to be used by error message */
-      if (lua_getstack(L, L->stacksize/SLOTS_PER_F, &dummy) == 0) {
-        /* too few funcs on stack: doesn't look like a recursion loop */
-        lua_error(L, "Lua2C - C2Lua overflow");
-      }
-      else
-        lua_error(L, "stack overflow; possible recursion loop");
+      lua_error(L, "stack overflow");
     }
   }
 }
 
 
 static void restore_stack_limit (lua_State *L) {
-  if (L->top-L->stack < L->stacksize-1)
-    L->stack_last = L->stack+(L->stacksize-1);
+  if (L->top - L->stack < L->stacksize - 1)
+    L->stack_last = L->stack + (L->stacksize-1);
 }
 
 
@@ -86,7 +72,7 @@ void luaD_adjusttop (lua_State *L, StkId base, int extra) {
   else {
     luaD_checkstack(L, diff);
     while (diff--)
-      ttype(L->top++) = TAG_NIL;
+      ttype(L->top++) = LUA_TNIL;
   }
 }
 
@@ -94,27 +80,33 @@ void luaD_adjusttop (lua_State *L, StkId base, int extra) {
 /*
 ** Open a hole inside the stack at `pos'
 */
-void luaD_openstack (lua_State *L, StkId pos) {
+static void luaD_openstack (lua_State *L, StkId pos) {
   int i = L->top-pos; 
   while (i--) pos[i+1] = pos[i];
   incr_top;
 }
 
 
-void luaD_lineHook (lua_State *L, StkId func, int line) {
+static void dohook (lua_State *L, lua_Debug *ar, lua_Hook hook) {
+  StkId old_Cbase = L->Cbase;
+  StkId old_top = L->Cbase = L->top;
+  luaD_checkstack(L, LUA_MINSTACK);  /* ensure minimum stack size */
+  L->allowhooks = 0;  /* cannot call hooks inside a hook */
+  (*hook)(L, ar);
+  LUA_ASSERT(L->allowhooks == 0, "invalid allow");
+  L->allowhooks = 1;
+  L->top = old_top;
+  L->Cbase = old_Cbase;
+}
+
+
+void luaD_lineHook (lua_State *L, StkId func, int line, lua_Hook linehook) {
   if (L->allowhooks) {
     lua_Debug ar;
-    struct C_Lua_Stack oldCLS = L->Cstack;
-    StkId old_top = L->Cstack.lua2C = L->Cstack.base = L->top;
-    L->Cstack.num = 0;
     ar._func = func;
     ar.event = "line";
     ar.currentline = line;
-    L->allowhooks = 0;  /* cannot call hooks inside a hook */
-    (*L->linehook)(L, &ar);
-    L->allowhooks = 1;
-    L->top = old_top;
-    L->Cstack = oldCLS;
+    dohook(L, &ar, linehook);
   }
 }
 
@@ -123,49 +115,33 @@ static void luaD_callHook (lua_State *L, StkId func, lua_Hook callhook,
                     const char *event) {
   if (L->allowhooks) {
     lua_Debug ar;
-    struct C_Lua_Stack oldCLS = L->Cstack;
-    StkId old_top = L->Cstack.lua2C = L->Cstack.base = L->top;
-    L->Cstack.num = 0;
     ar._func = func;
     ar.event = event;
-    L->allowhooks = 0;  /* cannot call hooks inside a hook */
-    callhook(L, &ar);
-    L->allowhooks = 1;
-    L->top = old_top;
-    L->Cstack = oldCLS;
+    infovalue(func)->pc = NULL;  /* function is not active */
+    dohook(L, &ar, callhook);
   }
 }
 
 
 static StkId callCclosure (lua_State *L, const struct Closure *cl, StkId base) {
-  int nup = cl->nelems;  /* number of upvalues */
-  int numarg = L->top-base;
-  struct C_Lua_Stack oldCLS = L->Cstack;
-  StkId firstResult;
-  if (nup > 0) {
-    int n = numarg;
-    luaD_checkstack(L, nup);
-    /* open space for upvalues as extra arguments */
-    while (n--) *(base+nup+n) = *(base+n);
-    L->top += nup;
-    numarg += nup;
-    /* copy upvalues into stack */
-    while (nup--) *(base+nup) = cl->consts[nup];
-  }
-  L->Cstack.num = numarg;
-  L->Cstack.lua2C = base;
-  L->Cstack.base = L->top;
-  (*cl->f.c)(L);  /* do the actual call */
-  firstResult = L->Cstack.base;
-  L->Cstack = oldCLS;
-  return firstResult;
+  int nup = cl->nupvalues;  /* number of upvalues */
+  StkId old_Cbase = L->Cbase;
+  int n;
+  L->Cbase = base;       /* new base for C function */
+  luaD_checkstack(L, nup+LUA_MINSTACK);  /* ensure minimum stack size */
+  for (n=0; n<nup; n++)  /* copy upvalues as extra arguments */
+    *(L->top++) = cl->upvalue[n];
+  n = (*cl->f.c)(L);  /* do the actual call */
+  L->Cbase = old_Cbase;  /* restore old C base */
+  return L->top - n;  /* return index of first result */
 }
 
 
-void luaD_callTM (lua_State *L, const TObject *f, int nParams, int nResults) {
+void luaD_callTM (lua_State *L, Closure *f, int nParams, int nResults) {
   StkId base = L->top - nParams;
   luaD_openstack(L, base);
-  *base = *f;
+  clvalue(base) = f;
+  ttype(base) = LUA_TFUNCTION;
   luaD_call(L, base, nResults);
 }
 
@@ -175,55 +151,186 @@ void luaD_callTM (lua_State *L, const TObject *f, int nParams, int nResults) {
 ** The arguments are on the stack, right after the function.
 ** When returns, the results are on the stack, starting at the original
 ** function position.
-** The number of results is nResults, unless nResults=MULT_RET.
+** The number of results is nResults, unless nResults=LUA_MULTRET.
 */ 
 void luaD_call (lua_State *L, StkId func, int nResults) {
+  lua_Hook callhook;
   StkId firstResult;
-  lua_Hook callhook = L->callhook;
-  retry:  /* for `function' tag method */
-  switch (ttype(func)) {
-    case TAG_LCLOSURE: {
-      ttype(func) = TAG_LMARK;
-      if (callhook)
-        luaD_callHook(L, func, callhook, "call");
-      firstResult = luaV_execute(L, clvalue(func), func+1);
-      break;
-    }
-    case TAG_CCLOSURE: {
-      ttype(func) = TAG_CMARK;
-      if (callhook)
-        luaD_callHook(L, func, callhook, "call");
-      firstResult = callCclosure(L, clvalue(func), func+1);
-      break;
-    }
-    default: { /* `func' is not a function; check the `function' tag method */
-      const TObject *im = luaT_getimbyObj(L, func, IM_FUNCTION);
-      if (ttype(im) == TAG_NIL)
-        luaG_callerror(L, func);
-      luaD_openstack(L, func);
-      *func = *im;  /* tag method is the new function to be called */
-      goto retry;   /* retry the call */
-    }
+  CallInfo ci;
+  Closure *cl;
+  if (ttype(func) != LUA_TFUNCTION) {
+    /* `func' is not a function; check the `function' tag method */
+    Closure *tm = luaT_gettmbyObj(L, func, TM_FUNCTION);
+    if (tm == NULL)
+      luaG_typeerror(L, func, "call");
+    luaD_openstack(L, func);
+    clvalue(func) = tm;  /* tag method is the new function to be called */
+    ttype(func) = LUA_TFUNCTION;
   }
+  cl = clvalue(func);
+  ci.func = cl;
+  infovalue(func) = &ci;
+  ttype(func) = LUA_TMARK;
+  callhook = L->callhook;
+  if (callhook)
+    luaD_callHook(L, func, callhook, "call");
+  firstResult = (cl->isC ? callCclosure(L, cl, func+1) :
+                           luaV_execute(L, cl, func+1));
   if (callhook)  /* same hook that was active at entry */
     luaD_callHook(L, func, callhook, "return");
-  /* adjust the number of results */
-  if (nResults == MULT_RET)
-    nResults = L->top - firstResult;
-  else
-    luaD_adjusttop(L, firstResult, nResults);
+  LUA_ASSERT(ttype(func) == LUA_TMARK, "invalid tag");
   /* move results to `func' (to erase parameters and function) */
-  while (nResults) {
-    *func++ = *(L->top - nResults);
-    nResults--;
+  if (nResults == LUA_MULTRET) {
+    while (firstResult < L->top)  /* copy all results */
+      *func++ = *firstResult++;
+    L->top = func;
   }
-  L->top = func;
+  else {  /* copy at most `nResults' */
+    for (; nResults > 0 && firstResult < L->top; nResults--)
+      *func++ = *firstResult++;
+    L->top = func;
+    for (; nResults > 0; nResults--) {  /* if there are not enough results */
+      ttype(L->top) = LUA_TNIL;  /* adjust the stack */
+      incr_top;  /* must check stack space */
+    }
+  }
+  luaC_checkGC(L);
 }
 
 
+/*
+** Execute a protected call.
+*/
+struct CallS {  /* data to `f_call' */
+  StkId func;
+  int nresults;
+};
+
+static void f_call (lua_State *L, void *ud) {
+  struct CallS *c = (struct CallS *)ud;
+  luaD_call(L, c->func, c->nresults);
+}
+
+
+LUA_API int lua_call (lua_State *L, int nargs, int nresults) {
+  StkId func = L->top - (nargs+1);  /* function to be called */
+  struct CallS c;
+  int status;
+  c.func = func; c.nresults = nresults;
+  status = luaD_runprotected(L, f_call, &c);
+  if (status != 0)  /* an error occurred? */
+    L->top = func;  /* remove parameters from the stack */
+  return status;
+}
+
+
+/*
+** Execute a protected parser.
+*/
+struct ParserS {  /* data to `f_parser' */
+  ZIO *z;
+  int bin;
+};
+
+static void f_parser (lua_State *L, void *ud) {
+  struct ParserS *p = (struct ParserS *)ud;
+  Proto *tf = p->bin ? luaU_undump(L, p->z) : luaY_parser(L, p->z);
+  luaV_Lclosure(L, tf, 0);
+}
+
+
+static int protectedparser (lua_State *L, ZIO *z, int bin) {
+  struct ParserS p;
+  unsigned long old_blocks;
+  int status;
+  p.z = z; p.bin = bin;
+  luaC_checkGC(L);
+  old_blocks = L->nblocks;
+  status = luaD_runprotected(L, f_parser, &p);
+  if (status == 0) {
+    /* add new memory to threshold (as it probably will stay) */
+    L->GCthreshold += (L->nblocks - old_blocks);
+  }
+  else if (status == LUA_ERRRUN)  /* an error occurred: correct error code */
+    status = LUA_ERRSYNTAX;
+  return status;
+}
+
+
+static int parse_file (lua_State *L, const char *filename) {
+  ZIO z;
+  int status;
+  int bin;  /* flag for file mode */
+  int c;    /* look ahead char */
+  FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
+  if (f == NULL) return LUA_ERRFILE;  /* unable to open file */
+  c = fgetc(f);
+  ungetc(c, f);
+  bin = (c == ID_CHUNK);
+  if (bin && f != stdin) {
+    f = freopen(filename, "rb", f);  /* set binary mode */
+    if (f == NULL) return LUA_ERRFILE;  /* unable to reopen file */
+  }
+  lua_pushstring(L, "@");
+  lua_pushstring(L, (filename == NULL) ? "(stdin)" : filename);
+  lua_concat(L, 2);
+  filename = lua_tostring(L, -1);  /* filename = '@'..filename */
+  lua_pop(L, 1);  /* OK: there is no GC during parser */
+  luaZ_Fopen(&z, f, filename);
+  status = protectedparser(L, &z, bin);
+  if (f != stdin)
+    fclose(f);
+  return status;
+}
+
+
+LUA_API int lua_dofile (lua_State *L, const char *filename) {
+  int status = parse_file(L, filename);
+  if (status == 0)  /* parse OK? */
+    status = lua_call(L, 0, LUA_MULTRET);  /* call main */
+  return status;
+}
+
+
+static int parse_buffer (lua_State *L, const char *buff, size_t size,
+                         const char *name) {
+  ZIO z;
+  if (!name) name = "?";
+  luaZ_mopen(&z, buff, size, name);
+  return protectedparser(L, &z, buff[0]==ID_CHUNK);
+}
+
+
+LUA_API int lua_dobuffer (lua_State *L, const char *buff, size_t size, const char *name) {
+  int status = parse_buffer(L, buff, size, name);
+  if (status == 0)  /* parse OK? */
+    status = lua_call(L, 0, LUA_MULTRET);  /* call main */
+  return status;
+}
+
+
+LUA_API int lua_dostring (lua_State *L, const char *str) {
+  return lua_dobuffer(L, str, strlen(str), str);
+}
+
+
+/*
+** {======================================================
+** Error-recover functions (based on long jumps)
+** =======================================================
+*/
+
+/* chain list of long jump buffers */
+struct lua_longjmp {
+  jmp_buf b;
+  struct lua_longjmp *previous;
+  volatile int status;  /* error code */
+};
+
+
 static void message (lua_State *L, const char *s) {
-  const TObject *em = &(luaS_assertglobalbyname(L, "_ERRORMESSAGE")->value);
-  if (*luaO_typename(em) == 'f') {
+  const TObject *em = luaH_getglobal(L, LUA_ERRORMESSAGE);
+  if (ttype(em) == LUA_TFUNCTION) {
     *L->top = *em;
     incr_top;
     lua_pushstring(L, s);
@@ -231,136 +338,48 @@ static void message (lua_State *L, const char *s) {
   }
 }
 
+
 /*
 ** Reports an error, and jumps up to the available recovery label
 */
-void lua_error (lua_State *L, const char *s) {
+LUA_API void lua_error (lua_State *L, const char *s) {
   if (s) message(L, s);
-  if (L->errorJmp)
+  luaD_breakrun(L, LUA_ERRRUN);
+}
+
+
+void luaD_breakrun (lua_State *L, int errcode) {
+  if (L->errorJmp) {
+    L->errorJmp->status = errcode;
     longjmp(L->errorJmp->b, 1);
+  }
   else {
-    message(L, "unable to recover; exiting\n");
-    exit(1);
+    if (errcode != LUA_ERRMEM)
+      message(L, "unable to recover; exiting\n");
+    exit(EXIT_FAILURE);
   }
 }
 
 
-/*
-** Execute a protected call. Assumes that function is at Cstack.base and
-** parameters are on top of it.
-*/
-int luaD_protectedrun (lua_State *L) {
-  struct lua_longjmp myErrorJmp;
-  StkId base = L->Cstack.base;
-  int numCblocks = L->numCblocks;
-  int status;
-  struct lua_longjmp *volatile oldErr = L->errorJmp;
-  L->errorJmp = &myErrorJmp;
-  if (setjmp(myErrorJmp.b) == 0) {
-    luaD_call(L, base, MULT_RET);
-    L->Cstack.lua2C = base;  /* position of the new results */
-    L->Cstack.num = L->top - base;
-    L->Cstack.base = base + L->Cstack.num;  /* incorporate results on stack */
-    status = 0;
-  }
-  else {  /* an error occurred: restore the stack */
-    L->Cstack.num = 0;  /* no results */
-    L->top = L->Cstack.base = L->Cstack.lua2C = base;
-    L->numCblocks = numCblocks;
+int luaD_runprotected (lua_State *L, void (*f)(lua_State *, void *), void *ud) {
+  StkId oldCbase = L->Cbase;
+  StkId oldtop = L->top;
+  struct lua_longjmp lj;
+  int allowhooks = L->allowhooks;
+  lj.status = 0;
+  lj.previous = L->errorJmp;  /* chain new error handler */
+  L->errorJmp = &lj;
+  if (setjmp(lj.b) == 0)
+    (*f)(L, ud);
+  else {  /* an error occurred: restore the state */
+    L->allowhooks = allowhooks;
+    L->Cbase = oldCbase;
+    L->top = oldtop;
     restore_stack_limit(L);
-    status = 1;
   }
-  L->errorJmp = oldErr;
-  return status;
+  L->errorJmp = lj.previous;  /* restore old error handler */
+  return lj.status;
 }
 
-
-/*
-** returns 0 = chunk loaded; 1 = error; 2 = no more chunks to load
-*/
-static int protectedparser (lua_State *L, ZIO *z, int bin) {
-  struct lua_longjmp myErrorJmp;
-  StkId base = L->Cstack.base;
-  int numCblocks = L->numCblocks;
-  int status;
-  Proto *volatile tf;
-  struct lua_longjmp *volatile oldErr = L->errorJmp;
-  L->errorJmp = &myErrorJmp;
-  L->top = base;   /* clear C2Lua */
-  if (setjmp(myErrorJmp.b) == 0) {
-    tf = bin ? luaU_undump1(L, z) : luaY_parser(L, z);
-    status = 0;
-  }
-  else {  /* an error occurred: restore Cstack and top */
-    L->Cstack.num = 0;  /* no results */
-    L->top = L->Cstack.base = L->Cstack.lua2C = base;
-    L->numCblocks = numCblocks;
-    tf = NULL;
-    status = 1;
-  }
-  L->errorJmp = oldErr;
-  if (status) return 1;  /* error code */
-  if (tf == NULL) return 2;  /* `natural' end */
-  luaV_Lclosure(L, tf, 0);
-  return 0;
-}
-
-
-static int do_main (lua_State *L, ZIO *z, int bin) {
-  int status;
-  int debug = L->debug;  /* save debug status */
-  do {
-    long old_blocks = (luaC_checkGC(L), L->nblocks);
-    status = protectedparser(L, z, bin);
-    if (status == 1) return 1;  /* error */
-    else if (status == 2) return 0;  /* `natural' end */
-    else {
-      unsigned long newelems2 = 2*(L->nblocks-old_blocks);
-      L->GCthreshold += newelems2;
-      status = luaD_protectedrun(L);
-      L->GCthreshold -= newelems2;
-    }
-  } while (bin && status == 0);
-  L->debug = debug;  /* restore debug status */
-  return status;
-}
-
-
-#define	MAXFILENAME	260	/* maximum part of a file name kept */
-
-int lua_dofile (lua_State *L, const char *filename) {
-  ZIO z;
-  int status;
-  int bin;  /* flag for file mode */
-  int c;    /* look ahead char */
-  char source[MAXFILENAME];
-  FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
-  if (f == NULL) return 2;  /* unable to open file */
-  luaL_filesource(source, filename, sizeof(source));
-  c = fgetc(f);
-  ungetc(c, f);
-  bin = (c == ID_CHUNK);
-  if (bin && f != stdin) {
-    f = freopen(filename, "rb", f);  /* set binary mode */
-    if (f == NULL) return 2;  /* unable to reopen file */
-  }
-  luaZ_Fopen(&z, f, source);
-  status = do_main(L, &z, bin);
-  if (f != stdin)
-    fclose(f);
-  return status;
-}
-
-
-int lua_dostring (lua_State *L, const char *str) {
-  return lua_dobuffer(L, str, strlen(str), str);
-}
-
-
-int lua_dobuffer (lua_State *L, const char *buff, int size, const char *name) {
-  ZIO z;
-  if (!name) name = "?";
-  luaZ_mopen(&z, buff, size, name);
-  return do_main(L, &z, buff[0]==ID_CHUNK);
-}
+/* }====================================================== */
 

ldo.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.h,v 1.19 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: ldo.h,v 1.27 2000/10/05 13:00:17 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -21,12 +21,13 @@
 
 void luaD_init (lua_State *L, int stacksize);
 void luaD_adjusttop (lua_State *L, StkId base, int extra);
-void luaD_openstack (lua_State *L, StkId pos);
-void luaD_lineHook (lua_State *L, StkId func, int line);
+void luaD_lineHook (lua_State *L, StkId func, int line, lua_Hook linehook);
 void luaD_call (lua_State *L, StkId func, int nResults);
-void luaD_callTM (lua_State *L, const TObject *f, int nParams, int nResults);
-int luaD_protectedrun (lua_State *L);
+void luaD_callTM (lua_State *L, Closure *f, int nParams, int nResults);
 void luaD_checkstack (lua_State *L, int n);
 
+void luaD_breakrun (lua_State *L, int errcode);
+int luaD_runprotected (lua_State *L, void (*f)(lua_State *, void *), void *ud);
+
 
 #endif

lfunc.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.c,v 1.20 2000/03/10 18:37:44 roberto Exp roberto $
+** $Id: lfunc.c,v 1.33 2000/10/18 17:19:09 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -7,62 +7,86 @@
 
 #include <stdlib.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lfunc.h"
 #include "lmem.h"
 #include "lstate.h"
 
-#define gcsizeproto(L, p)	numblocks(L, 0, sizeof(Proto))
-#define gcsizeclosure(L, c)	numblocks(L, c->nelems, sizeof(Closure))
 
+#define sizeclosure(n)	((int)sizeof(Closure) + (int)sizeof(TObject)*((n)-1))
 
 
 Closure *luaF_newclosure (lua_State *L, int nelems) {
-  Closure *c = (Closure *)luaM_malloc(L, sizeof(Closure) +
-                                         sizeof(TObject)*(nelems-1));
+  int size = sizeclosure(nelems);
+  Closure *c = (Closure *)luaM_malloc(L, size);
   c->next = L->rootcl;
   L->rootcl = c;
-  c->marked = 0;
-  c->nelems = nelems;
-  L->nblocks += gcsizeclosure(L, c);
+  c->mark = c;
+  c->nupvalues = nelems;
+  L->nblocks += size;
   return c;
 }
 
 
 Proto *luaF_newproto (lua_State *L) {
   Proto *f = luaM_new(L, Proto);
-  f->code = NULL;
-  f->lineDefined = 0;
-  f->source = NULL;
-  f->kstr = NULL;
-  f->nkstr = 0;
   f->knum = NULL;
   f->nknum = 0;
+  f->kstr = NULL;
+  f->nkstr = 0;
   f->kproto = NULL;
   f->nkproto = 0;
-  f->locvars = NULL;
-  f->next = L->rootproto;
-  L->rootproto = f;
+  f->code = NULL;
+  f->ncode = 0;
+  f->numparams = 0;
+  f->is_vararg = 0;
+  f->maxstacksize = 0;
   f->marked = 0;
-  L->nblocks += gcsizeproto(L, f);
+  f->lineinfo = NULL;
+  f->nlineinfo = 0;
+  f->nlocvars = 0;
+  f->locvars = NULL;
+  f->lineDefined = 0;
+  f->source = NULL;
+  f->next = L->rootproto;  /* chain in list of protos */
+  L->rootproto = f;
   return f;
 }
 
 
+static size_t protosize (Proto *f) {
+  return sizeof(Proto)
+       + f->nknum*sizeof(Number)
+       + f->nkstr*sizeof(TString *)
+       + f->nkproto*sizeof(Proto *)
+       + f->ncode*sizeof(Instruction)
+       + f->nlocvars*sizeof(struct LocVar)
+       + f->nlineinfo*sizeof(int);
+}
+
+
+void luaF_protook (lua_State *L, Proto *f, int pc) {
+  f->ncode = pc;  /* signal that proto was properly created */
+  L->nblocks += protosize(f);
+}
+
+
 void luaF_freeproto (lua_State *L, Proto *f) {
-  L->nblocks -= gcsizeproto(L, f);
+  if (f->ncode > 0)  /* function was properly created? */
+    L->nblocks -= protosize(f);
   luaM_free(L, f->code);
   luaM_free(L, f->locvars);
   luaM_free(L, f->kstr);
   luaM_free(L, f->knum);
   luaM_free(L, f->kproto);
+  luaM_free(L, f->lineinfo);
   luaM_free(L, f);
 }
 
 
 void luaF_freeclosure (lua_State *L, Closure *c) {
-  L->nblocks -= gcsizeclosure(L, c);
+  L->nblocks -= sizeclosure(c->nupvalues);
   luaM_free(L, c);
 }
 
@@ -71,22 +95,15 @@ void luaF_freeclosure (lua_State *L, Closure *c) {
 ** Look for n-th local variable at line `line' in function `func'.
 ** Returns NULL if not found.
 */
-const char *luaF_getlocalname (const Proto *func,
-                               int local_number, int line) {
-  int count = 0;
-  const char *varname = NULL;
-  LocVar *lv = func->locvars;
-  if (lv == NULL)
-    return NULL;
-  for (; lv->line != -1 && lv->line < line; lv++) {
-    if (lv->varname) {  /* register */
-      if (++count == local_number)
-        varname = lv->varname->str;
+const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
+  int i;
+  for (i = 0; i<f->nlocvars && f->locvars[i].startpc <= pc; i++) {
+    if (pc < f->locvars[i].endpc) {  /* is variable active? */
+      local_number--;
+      if (local_number == 0)
+        return f->locvars[i].varname->str;
     }
-    else  /* unregister */
-      if (--count < local_number)
-        varname = NULL;
   }
-  return varname;
+  return NULL;  /* not found */
 }
 

lfunc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.h,v 1.10 1999/12/27 17:33:22 roberto Exp roberto $
+** $Id: lfunc.h,v 1.12 2000/06/26 19:28:31 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -13,12 +13,12 @@
 
 
 Proto *luaF_newproto (lua_State *L);
+void luaF_protook (lua_State *L, Proto *f, int pc);
 Closure *luaF_newclosure (lua_State *L, int nelems);
 void luaF_freeproto (lua_State *L, Proto *f);
 void luaF_freeclosure (lua_State *L, Closure *c);
 
-const char *luaF_getlocalname (const Proto *func,
-                               int local_number, int line);
+const char *luaF_getlocalname (const Proto *func, int local_number, int pc);
 
 
 #endif

lgc.c

@@ -1,130 +1,185 @@
 /*
-** $Id: lgc.c,v 1.46 2000/03/30 20:55:50 roberto Exp roberto $
+** $Id: lgc.c,v 1.71 2000/10/05 13:00:17 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "ldo.h"
 #include "lfunc.h"
 #include "lgc.h"
 #include "lmem.h"
 #include "lobject.h"
-#include "lref.h"
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
-#include "lua.h"
+
+
+typedef struct GCState {
+  Hash *tmark;  /* list of marked tables to be visited */
+  Closure *cmark;  /* list of marked closures to be visited */
+} GCState;
 
 
 
-static void luaD_gcTM (lua_State *L, const TObject *o) {
-  const TObject *im = luaT_getimbyObj(L, o, IM_GC);
-  if (ttype(im) != TAG_NIL) {
-    luaD_checkstack(L, 2);
-    *(L->top++) = *im;
-    *(L->top++) = *o;
-    luaD_call(L, L->top-2, 0);
-  }
-}
-
-
-static int markobject (lua_State *L, TObject *o);
+static void markobject (GCState *st, TObject *o);
 
 
 /* mark a string; marks larger than 1 cannot be changed */
-#define strmark(L, s)    {if ((s)->marked == 0) (s)->marked = 1;}
+#define strmark(s)    {if ((s)->marked == 0) (s)->marked = 1;}
 
 
 
-static void protomark (lua_State *L, Proto *f) {
+static void protomark (Proto *f) {
   if (!f->marked) {
     int i;
     f->marked = 1;
-    strmark(L, f->source);
-    for (i=f->nkstr-1; i>=0; i--)
-      strmark(L, f->kstr[i]);
-    for (i=f->nkproto-1; i>=0; i--)
-      protomark(L, f->kproto[i]);
+    strmark(f->source);
+    for (i=0; i<f->nkstr; i++)
+      strmark(f->kstr[i]);
+    for (i=0; i<f->nkproto; i++)
+      protomark(f->kproto[i]);
+    for (i=0; i<f->nlocvars; i++)  /* mark local-variable names */
+      strmark(f->locvars[i].varname);
   }
 }
 
 
-static void closuremark (lua_State *L, Closure *f) {
-  if (!f->marked) {
-    int i = f->nelems;
-    f->marked = 1;
-    while (i--)
-      markobject(L, &f->consts[i]);
-  }
+static void markstack (lua_State *L, GCState *st) {
+  StkId o;
+  for (o=L->stack; o<L->top; o++)
+    markobject(st, o);
 }
 
 
-static void hashmark (lua_State *L, Hash *h) {
-  if (!h->marked) {
-    int i;
-    h->marked = 1;
-    for (i=h->size-1; i>=0; i--) {
-      Node *n = node(h,i);
-      if (ttype(key(n)) != TAG_NIL) {
-        markobject(L, &n->key);
-        markobject(L, &n->val);
-      }
-    }
-  }
-}
-
-
-static void travglobal (lua_State *L) {
-  GlobalVar *gv;
-  for (gv=L->rootglobal; gv; gv=gv->next) {
-    LUA_ASSERT(L, gv->name->u.s.gv == gv, "inconsistent global name");
-    if (gv->value.ttype != TAG_NIL) {
-      strmark(L, gv->name);  /* cannot collect non nil global variables */
-      markobject(L, &gv->value);
-    }
-  }
-}
-
-
-static void travstack (lua_State *L) {
-  int i;
-  for (i = (L->top-1)-L->stack; i>=0; i--)
-    markobject(L, L->stack+i);
-}
-
-
-static void travlock (lua_State *L) {
+static void marklock (lua_State *L, GCState *st) {
   int i;
   for (i=0; i<L->refSize; i++) {
     if (L->refArray[i].st == LOCK)
-      markobject(L, &L->refArray[i].o);
+      markobject(st, &L->refArray[i].o);
   }
 }
 
 
-static int markobject (lua_State *L, TObject *o) {
+static void markclosure (GCState *st, Closure *cl) {
+  if (!ismarked(cl)) {
+    if (!cl->isC)
+      protomark(cl->f.l);
+    cl->mark = st->cmark;  /* chain it for later traversal */
+    st->cmark = cl;
+  }
+}
+
+
+static void marktagmethods (lua_State *L, GCState *st) {
+  int e;
+  for (e=0; e<TM_N; e++) {
+    int t;
+    for (t=0; t<=L->last_tag; t++) {
+      Closure *cl = luaT_gettm(L, t, e);
+      if (cl) markclosure(st, cl);
+    }
+  }
+}
+
+
+static void markobject (GCState *st, TObject *o) {
   switch (ttype(o)) {
-    case TAG_USERDATA:  case TAG_STRING:
-      strmark(L, tsvalue(o));
+    case LUA_TUSERDATA:  case LUA_TSTRING:
+      strmark(tsvalue(o));
       break;
-    case TAG_TABLE:
-      hashmark(L, avalue(o));
+    case LUA_TMARK:
+      markclosure(st, infovalue(o)->func);
       break;
-    case TAG_LCLOSURE:  case TAG_LMARK:
-      protomark(L, clvalue(o)->f.l);
-      /* go trhough */
-    case TAG_CCLOSURE:  case TAG_CMARK:
-      closuremark(L, clvalue(o));
+    case LUA_TFUNCTION:
+      markclosure(st, clvalue(o));
       break;
+    case LUA_TTABLE: {
+      if (!ismarked(hvalue(o))) {
+        hvalue(o)->mark = st->tmark;  /* chain it in list of marked */
+        st->tmark = hvalue(o);
+      }
+      break;
+    }
     default: break;  /* numbers, etc */
   }
-  return 0;
 }
 
 
+static void markall (lua_State *L) {
+  GCState st;
+  st.cmark = NULL;
+  st.tmark = L->gt;  /* put table of globals in mark list */
+  L->gt->mark = NULL;
+  marktagmethods(L, &st);  /* mark tag methods */
+  markstack(L, &st); /* mark stack objects */
+  marklock(L, &st); /* mark locked objects */
+  for (;;) {  /* mark tables and closures */
+    if (st.cmark) {
+      int i;
+      Closure *f = st.cmark;  /* get first closure from list */
+      st.cmark = f->mark;  /* remove it from list */
+      for (i=0; i<f->nupvalues; i++)  /* mark its upvalues */
+        markobject(&st, &f->upvalue[i]);
+    }
+    else if (st.tmark) {
+      int i;
+      Hash *h = st.tmark;  /* get first table from list */
+      st.tmark = h->mark;  /* remove it from list */
+      for (i=0; i<h->size; i++) {
+        Node *n = node(h, i);
+        if (ttype(key(n)) != LUA_TNIL) {
+          if (ttype(val(n)) == LUA_TNIL)
+            luaH_remove(h, key(n));  /* dead element; try to remove it */
+          markobject(&st, &n->key);
+          markobject(&st, &n->val);
+        }
+      }
+    }
+    else break;  /* nothing else to mark */
+  }
+}
+
+
+static int hasmark (const TObject *o) {
+  /* valid only for locked objects */
+  switch (o->ttype) {
+    case LUA_TSTRING: case LUA_TUSERDATA:
+      return tsvalue(o)->marked;
+    case LUA_TTABLE:
+      return ismarked(hvalue(o));
+    case LUA_TFUNCTION:
+      return ismarked(clvalue(o));
+    default:  /* number */
+      return 1;
+  }
+}
+
+
+/* macro for internal debugging; check if a link of free refs is valid */
+#define VALIDLINK(L, st,n)      (NONEXT <= (st) && (st) < (n))
+
+static void invalidaterefs (lua_State *L) {
+  int n = L->refSize;
+  int i;
+  for (i=0; i<n; i++) {
+    struct Ref *r = &L->refArray[i];
+    if (r->st == HOLD && !hasmark(&r->o))
+      r->st = COLLECTED;
+    LUA_ASSERT((r->st == LOCK && hasmark(&r->o)) ||
+               (r->st == HOLD && hasmark(&r->o)) ||
+                r->st == COLLECTED ||
+                r->st == NONEXT ||
+               (r->st < n && VALIDLINK(L, L->refArray[r->st].st, n)),
+               "inconsistent ref table");
+  }
+  LUA_ASSERT(VALIDLINK(L, L->refFree, n), "inconsistent ref table");
+}
+
+
+
 static void collectproto (lua_State *L) {
   Proto **p = &L->rootproto;
   Proto *next;
@@ -145,8 +200,8 @@ static void collectclosure (lua_State *L) {
   Closure **p = &L->rootcl;
   Closure *next;
   while ((next = *p) != NULL) {
-    if (next->marked) {
-      next->marked = 0;
+    if (ismarked(next)) {
+      next->mark = next;  /* unmark */
       p = &next->next;
     }
     else {
@@ -161,8 +216,8 @@ static void collecttable (lua_State *L) {
   Hash **p = &L->roottable;
   Hash *next;
   while ((next = *p) != NULL) {
-    if (next->marked) {
-      next->marked = 0;
+    if (ismarked(next)) {
+      next->mark = next;  /* unmark */
       p = &next->next;
     }
     else {
@@ -173,97 +228,126 @@ static void collecttable (lua_State *L) {
 }
 
 
-/*
-** remove from the global list globals whose names will be collected
-** (the global itself is freed when its name is freed)
-*/
-static void clear_global_list (lua_State *L, int limit) {
-  GlobalVar **p = &L->rootglobal;
-  GlobalVar *next;
-  while ((next = *p) != NULL) {
-    if (next->name->marked >= limit) p = &next->next;
-    else *p = next->next;
-  }
+static void checktab (lua_State *L, stringtable *tb) {
+  if (tb->nuse < (lint32)(tb->size/4) && tb->size > 10)
+    luaS_resize(L, tb, tb->size/2);  /* table is too big */
 }
 
 
-/*
-** collect all elements with `marked' < `limit'.
-** with limit=1, that means all unmarked elements;
-** with limit=MAX_INT, that means all elements.
-*/
-static void collectstring (lua_State *L, int limit) {
-  TObject o;  /* to call userdata `gc' tag method */
+static void collectstrings (lua_State *L, int all) {
   int i;
-  ttype(&o) = TAG_USERDATA;
-  clear_global_list(L, limit);
-  for (i=0; i<NUM_HASHS; i++) {  /* for each hash table */
-    stringtable *tb = &L->string_root[i];
-    int j;
-    for (j=0; j<tb->size; j++) {  /* for each list */
-      TString **p = &tb->hash[j];
-      TString *next;
-      while ((next = *p) != NULL) {
-       if (next->marked >= limit) {
-         if (next->marked < FIXMARK)  /* does not change FIXMARKs */
-           next->marked = 0;
-         p = &next->nexthash;
-       } 
-       else {  /* collect */
-          if (next->constindex == -1) {  /* is userdata? */
-            tsvalue(&o) = next;
-            luaD_gcTM(L, &o);
-          }
-          *p = next->nexthash;
-          luaS_free(L, next);
-          tb->nuse--;
-        }
+  for (i=0; i<L->strt.size; i++) {  /* for each list */
+    TString **p = &L->strt.hash[i];
+    TString *next;
+    while ((next = *p) != NULL) {
+      if (next->marked && !all) {  /* preserve? */
+        if (next->marked < FIXMARK)  /* does not change FIXMARKs */
+          next->marked = 0;
+        p = &next->nexthash;
+      } 
+      else {  /* collect */
+        *p = next->nexthash;
+        L->strt.nuse--;
+        L->nblocks -= sizestring(next->len);
+        luaM_free(L, next);
       }
     }
-    if ((tb->nuse+1)*6 < tb->size)
-      luaS_resize(L, tb, tb->size/2);  /* table is too big */
+  }
+  checktab(L, &L->strt);
+}
+
+
+static void collectudata (lua_State *L, int all) {
+  int i;
+  for (i=0; i<L->udt.size; i++) {  /* for each list */
+    TString **p = &L->udt.hash[i];
+    TString *next;
+    while ((next = *p) != NULL) {
+      LUA_ASSERT(next->marked <= 1, "udata cannot be fixed");
+      if (next->marked && !all) {  /* preserve? */
+        next->marked = 0;
+        p = &next->nexthash;
+      } 
+      else {  /* collect */
+        int tag = next->u.d.tag;
+        *p = next->nexthash;
+        next->nexthash = L->TMtable[tag].collected;  /* chain udata */
+        L->TMtable[tag].collected = next;
+        L->nblocks -= sizestring(next->len);
+        L->udt.nuse--;
+      }
+    }
+  }
+  checktab(L, &L->udt);
+}
+
+
+#define MINBUFFER	256
+static void checkMbuffer (lua_State *L) {
+  if (L->Mbuffsize > MINBUFFER*2) {  /* is buffer too big? */
+    size_t newsize = L->Mbuffsize/2;  /* still larger than MINBUFFER */
+    L->nblocks += (newsize - L->Mbuffsize)*sizeof(char);
+    L->Mbuffsize = newsize;
+    luaM_reallocvector(L, L->Mbuffer, newsize, char);
   }
 }
 
 
-static void markall (lua_State *L) {
-  travstack(L); /* mark stack objects */
-  travglobal(L);  /* mark global variable values and names */
-  travlock(L); /* mark locked objects */
-  luaT_travtagmethods(L, markobject);  /* mark tag methods */
+static void callgcTM (lua_State *L, const TObject *o) {
+  Closure *tm = luaT_gettmbyObj(L, o, TM_GC);
+  if (tm != NULL) {
+    int oldah = L->allowhooks;
+    L->allowhooks = 0;  /* stop debug hooks during GC tag methods */
+    luaD_checkstack(L, 2);
+    clvalue(L->top) = tm;
+    ttype(L->top) = LUA_TFUNCTION;
+    *(L->top+1) = *o;
+    L->top += 2;
+    luaD_call(L, L->top-2, 0);
+    L->allowhooks = oldah;  /* restore hooks */
+  }
+}
+
+
+static void callgcTMudata (lua_State *L) {
+  int tag;
+  TObject o;
+  ttype(&o) = LUA_TUSERDATA;
+  L->GCthreshold = 2*L->nblocks;  /* avoid GC during tag methods */
+  for (tag=L->last_tag; tag>=0; tag--) {  /* for each tag (in reverse order) */
+    TString *udata;
+    while ((udata = L->TMtable[tag].collected) != NULL) {
+      L->TMtable[tag].collected = udata->nexthash;  /* remove it from list */
+      tsvalue(&o) = udata;
+      callgcTM(L, &o);
+      luaM_free(L, udata);
+    }
+  }
 }
 
 
 void luaC_collect (lua_State *L, int all) {
-  int oldah = L->allowhooks;
-  L->allowhooks = 0;  /* stop debug hooks during GC */
-  L->GCthreshold *= 4;  /* to avoid GC during GC */
+  collectudata(L, all);
+  callgcTMudata(L);
+  collectstrings(L, all);
   collecttable(L);
-  collectstring(L, all?MAX_INT:1);
   collectproto(L);
   collectclosure(L);
-  L->allowhooks = oldah;  /* restore hooks */
 }
 
 
-long lua_collectgarbage (lua_State *L, long limit) {
-  unsigned long recovered = L->nblocks;  /* to subtract `nblocks' after gc */
+static void luaC_collectgarbage (lua_State *L) {
   markall(L);
-  luaR_invalidaterefs(L);
+  invalidaterefs(L);  /* check unlocked references */
   luaC_collect(L, 0);
-  recovered = recovered - L->nblocks;
-  L->GCthreshold = (limit == 0) ? 2*L->nblocks : L->nblocks+limit;
-  if (L->Mbuffsize > L->Mbuffnext*4) {  /* is buffer too big? */
-    L->Mbuffsize /= 2;  /* still larger than Mbuffnext*2 */
-    luaM_reallocvector(L, L->Mbuffer, L->Mbuffsize, char);
-  }
-  luaD_gcTM(L, &luaO_nilobject);
-  return recovered;
+  checkMbuffer(L);
+  L->GCthreshold = 2*L->nblocks;  /* set new threshold */
+  callgcTM(L, &luaO_nilobject);
 }
 
 
 void luaC_checkGC (lua_State *L) {
   if (L->nblocks >= L->GCthreshold)
-    lua_collectgarbage(L, 0);
+    luaC_collectgarbage(L);
 }
 

lgc.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lgc.h,v 1.6 1999/10/04 17:51:04 roberto Exp roberto $
+** $Id: lgc.h,v 1.7 1999/11/22 13:12:07 roberto Exp roberto $
 ** Garbage Collector
 ** See Copyright Notice in lua.h
 */
@@ -11,8 +11,8 @@
 #include "lobject.h"
 
 
-void luaC_checkGC (lua_State *L);
 void luaC_collect (lua_State *L, int all);
+void luaC_checkGC (lua_State *L);
 
 
 #endif

linit.c

@@ -1,21 +1,8 @@
 /*
-** $Id: linit.c,v 1.2 1999/11/22 13:12:07 roberto Exp roberto $
+** $Id: linit.c,v 1.5 2000/06/16 17:22:43 roberto Exp roberto $
 ** Initialization of libraries for lua.c
 ** See Copyright Notice in lua.h
 */
 
-#define LUA_REENTRANT
-
-#include "lua.h"
-#include "lualib.h"
-
-
-void lua_userinit (lua_State *L) {
-  lua_beginblock(L);
-  lua_iolibopen(L);
-  lua_strlibopen(L);
-  lua_mathlibopen(L);
-  lua_dblibopen(L);
-  lua_endblock(L);
-}
+>>>>>>> This module is now obsolete, and is not part of Lua. <<<<<<<<<
 

liolib.c

@@ -1,27 +1,28 @@
 /*
-** $Id: liolib.c,v 1.61 2000/03/30 17:19:48 roberto Exp roberto $
+** $Id: liolib.c,v 1.90 2000/10/27 16:15:53 roberto Exp roberto $
 ** Standard I/O (and system) library
 ** See Copyright Notice in lua.h
 */
 
 
 #include <ctype.h>
-#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lauxlib.h"
-#include "lua.h"
 #include "luadebug.h"
 #include "lualib.h"
 
 
 #ifndef OLD_ANSI
+#include <errno.h>
 #include <locale.h>
+#define realloc(b,s)    ((b) == NULL ? malloc(s) : (realloc)(b, s))
+#define free(b)         if (b) (free)(b)
 #else
 /* no support for locale and for strerror: fake them */
 #define setlocale(a,b)	((void)a, strcmp((b),"C")==0?"C":NULL)
@@ -31,7 +32,8 @@
 #define LC_MONETARY	0
 #define LC_NUMERIC	0
 #define LC_TIME		0
-#define strerror(e)	"(no error message provided by operating system)"
+#define strerror(e)	"generic I/O error"
+#define errno		(-1)
 #endif
 
 
@@ -51,46 +53,26 @@ int pclose(); */
 #define OUTFILE 1
 
 typedef struct IOCtrl {
-  FILE *file[2];  /* values of _INPUT and _OUTPUT */
+  int ref[2];  /* ref for strings _INPUT/_OUTPUT */
   int iotag;    /* tag for file handles */
   int closedtag;  /* tag for closed handles */
 } IOCtrl;
 
 
 
-static const char *const filenames[] = {"_INPUT", "_OUTPUT", NULL};
+static const char *const filenames[] = {"_INPUT", "_OUTPUT"};
 
 
-static void atribTM (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  const char *varname = luaL_check_string(L, 2);
-  lua_Object newvalue = lua_getparam(L, 4);
-  int inout;
-  if ((inout = luaL_findstring(varname, filenames)) != -1) {
-    if (lua_tag(L, newvalue) != ctrl->iotag)
-      luaL_verror(L, "%.20s value must be a valid file handle",
-                     filenames[inout]);
-    ctrl->file[inout] = (FILE *)lua_getuserdata(L, newvalue);
-  }
-  /* set the actual variable */
-  lua_pushobject(L, newvalue);
-  lua_rawsetglobal(L, varname);
-}
-
-
-static void ctrl_collect (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  free(ctrl);
-}
-
-
-static void pushresult (lua_State *L, int i) {
-  if (i)
+static int pushresult (lua_State *L, int i) {
+  if (i) {
     lua_pushuserdata(L, NULL);
+    return 1;
+  }
   else {
     lua_pushnil(L);
     lua_pushstring(L, strerror(errno));
     lua_pushnumber(L, errno);
+    return 3;;
   }
 }
 
@@ -102,11 +84,12 @@ static void pushresult (lua_State *L, int i) {
 */
 
 
-static FILE *gethandle (lua_State *L, IOCtrl *ctrl, lua_Object f) {
-  if (lua_isuserdata(L, f)) {
+static FILE *gethandle (lua_State *L, IOCtrl *ctrl, int f) {
+  void *p = lua_touserdata(L, f);
+  if (p != NULL) {  /* is `f' a userdata ? */
     int ftag = lua_tag(L, f);
-    if (ftag == ctrl->iotag)
-      return (FILE *)lua_getuserdata(L, f);
+    if (ftag == ctrl->iotag)  /* does it have the correct tag? */
+      return (FILE *)p;
     else if (ftag == ctrl->closedtag)
       lua_error(L, "cannot access a closed file");
     /* else go through */
@@ -116,20 +99,22 @@ static FILE *gethandle (lua_State *L, IOCtrl *ctrl, lua_Object f) {
 
 
 static FILE *getnonullfile (lua_State *L, IOCtrl *ctrl, int arg) {
-  FILE *f = gethandle(L, ctrl, lua_getparam(L, arg));
+  FILE *f = gethandle(L, ctrl, arg);
   luaL_arg_check(L, f, arg, "invalid file handle");
   return f;
 }
 
 
-static FILE *getfileparam (lua_State *L, IOCtrl *ctrl, int *arg, int inout) {
-  FILE *f = gethandle(L, ctrl, lua_getparam(L, *arg));
-  if (f) {
-    (*arg)++;
-    return f;
-  }
-  else
-    return ctrl->file[inout];
+static FILE *getfilebyref (lua_State *L, IOCtrl *ctrl, int inout) {
+  FILE *f;
+  lua_getglobals(L);
+  lua_getref(L, ctrl->ref[inout]);
+  lua_rawget(L, -2);
+  f = gethandle(L, ctrl, -1);
+  if (f == NULL)
+    luaL_verror(L, "global variable `%.10s' is not a file handle",
+                filenames[inout]);
+  return f;
 }
 
 
@@ -140,31 +125,24 @@ static void setfilebyname (lua_State *L, IOCtrl *ctrl, FILE *f,
 }
 
 
-static void setfile (lua_State *L, IOCtrl *ctrl, FILE *f, int inout) {
-  ctrl->file[inout] = f;
-  lua_pushusertag(L, f, ctrl->iotag);
-  lua_setglobal(L, filenames[inout]);
-}
+#define setfile(L,ctrl,f,inout)	(setfilebyname(L,ctrl,f,filenames[inout]))
 
 
-static void setreturn (lua_State *L, IOCtrl *ctrl, FILE *f, int inout) {
+static int setreturn (lua_State *L, IOCtrl *ctrl, FILE *f, int inout) {
   if (f == NULL)
-    pushresult(L, 0);
+    return pushresult(L, 0);
   else {
     setfile(L, ctrl, f, inout);
     lua_pushusertag(L, f, ctrl->iotag);
+    return 1;
   }
 }
 
 
 static int closefile (lua_State *L, IOCtrl *ctrl, FILE *f) {
-  if (f == stdin || f == stdout)
+  if (f == stdin || f == stdout || f == stderr)
     return 1;
   else {
-    if (f == ctrl->file[INFILE])
-      setfile(L, ctrl, stdin, INFILE);
-    else if (f == ctrl->file[OUTFILE])
-      setfile(L, ctrl, stdout, OUTFILE);
     lua_pushusertag(L, f, ctrl->iotag);
     lua_settag(L, ctrl->closedtag);
     return (CLOSEFILE(L, f) == 0);
@@ -172,53 +150,71 @@ static int closefile (lua_State *L, IOCtrl *ctrl, FILE *f) {
 }
 
 
-static void io_close (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  pushresult(L, closefile(L, ctrl, getnonullfile(L, ctrl, 2)));
+static int io_close (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  lua_pop(L, 1);  /* remove upvalue */
+  return pushresult(L, closefile(L, ctrl, getnonullfile(L, ctrl, 1)));
 }
 
 
-static void io_open (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  FILE *f = fopen(luaL_check_string(L, 2), luaL_check_string(L, 3));
-  if (f) lua_pushusertag(L, f, ctrl->iotag);
-  else pushresult(L, 0);
+static int file_collect (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *f = getnonullfile(L, ctrl, 1);
+  if (f != stdin && f != stdout && f != stderr)
+    CLOSEFILE(L, f);
+  return 0;
 }
 
 
-
-static void io_fromto (lua_State *L, int inout, const char *mode) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  lua_Object f = lua_getparam(L, 2);
-  FILE *current;
-  if (f == LUA_NOOBJECT) {
-    pushresult(L, closefile(L, ctrl, ctrl->file[inout]));
-    return;
+static int io_open (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *f;
+  lua_pop(L, 1);  /* remove upvalue */
+  f = fopen(luaL_check_string(L, 1), luaL_check_string(L, 2));
+  if (f) {
+    lua_pushusertag(L, f, ctrl->iotag);
+    return 1;
   }
-  else if (lua_tag(L, f) == ctrl->iotag)  /* deprecated option */
-    current = (FILE *)lua_getuserdata(L, f);
+  else
+    return pushresult(L, 0);
+}
+
+
+
+static int io_fromto (lua_State *L, int inout, const char *mode) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *current;
+  lua_pop(L, 1);  /* remove upvalue */
+  if (lua_isnull(L, 1)) {
+    closefile(L, ctrl, getfilebyref(L, ctrl, inout));
+    current = (inout == 0) ? stdin : stdout;    
+  }
+  else if (lua_tag(L, 1) == ctrl->iotag)  /* deprecated option */
+    current = (FILE *)lua_touserdata(L, 1);
   else {
-    const char *s = luaL_check_string(L, 2);
+    const char *s = luaL_check_string(L, 1);
     current = (*s == '|') ? popen(s+1, mode) : fopen(s, mode);
   }
-  setreturn(L, ctrl, current, inout);
+  return setreturn(L, ctrl, current, inout);
 }
 
 
-static void io_readfrom (lua_State *L) {
-  io_fromto(L, INFILE, "r");
+static int io_readfrom (lua_State *L) {
+  return io_fromto(L, INFILE, "r");
 }
 
 
-static void io_writeto (lua_State *L) {
-  io_fromto(L, OUTFILE, "w");
+static int io_writeto (lua_State *L) {
+  return io_fromto(L, OUTFILE, "w");
 }
 
 
-static void io_appendto (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  FILE *current = fopen(luaL_check_string(L, 2), "a");
-  setreturn(L, ctrl, current, OUTFILE);
+static int io_appendto (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *current;
+  lua_pop(L, 1);  /* remove upvalue */
+  current = fopen(luaL_check_string(L, 1), "a");
+  return setreturn(L, ctrl, current, OUTFILE);
 }
 
 
@@ -243,6 +239,8 @@ static void io_appendto (lua_State *L) {
 static int read_pattern (lua_State *L, FILE *f, const char *p) {
   int inskip = 0;  /* {skip} level */
   int c = NEED_OTHER;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
   while (*p != '\0') {
     switch (*p) {
       case '{':
@@ -260,7 +258,7 @@ static int read_pattern (lua_State *L, FILE *f, const char *p) {
         if (c == NEED_OTHER) c = getc(f);
         m = (c==EOF) ? 0 : luaI_singlematch(c, p, ep);
         if (m) {
-          if (!inskip) luaL_addchar(L, c);
+          if (!inskip) luaL_putchar(&b, c);
           c = NEED_OTHER;
         }
         switch (*ep) {
@@ -271,7 +269,7 @@ static int read_pattern (lua_State *L, FILE *f, const char *p) {
             while (m) {  /* reads the same item until it fails */
               c = getc(f);
               m = (c==EOF) ? 0 : luaI_singlematch(c, p, ep);
-              if (m && !inskip) luaL_addchar(L, c);
+              if (m && !inskip) luaL_putchar(&b, c);
             }
             /* go through to continue reading the pattern */
           case '?':  /* optional */
@@ -285,6 +283,7 @@ static int read_pattern (lua_State *L, FILE *f, const char *p) {
     }
   } break_while:
   if (c != NEED_OTHER) ungetc(c, f);
+  luaL_pushresult(&b);  /* close buffer */
   return (*p == '\0');
 }
 
@@ -305,71 +304,108 @@ static int read_number (lua_State *L, FILE *f) {
 }
 
 
-static void read_word (lua_State *L, FILE *f) {
+static int read_word (lua_State *L, FILE *f) {
   int c;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
   do { c = fgetc(f); } while (isspace(c));  /* skip spaces */
   while (c != EOF && !isspace(c)) {
-    luaL_addchar(L, c);
+    luaL_putchar(&b, c);
     c = fgetc(f);
   }
   ungetc(c, f);
+  luaL_pushresult(&b);  /* close buffer */
+  return (lua_strlen(L, -1) > 0);
 }
 
 
-#define HUNK_LINE	256
-#define HUNK_FILE	BUFSIZ
-
 static int read_line (lua_State *L, FILE *f) {
-  int n;
-  char *b;
-  do {
-    b = luaL_openspace(L, HUNK_LINE);
-    if (!fgets(b, HUNK_LINE, f)) return 0;  /* read fails */
-    n = strlen(b);
-    luaL_addsize(L, n); 
-  } while (b[n-1] != '\n');
-  luaL_addsize(L, -1);  /* remove '\n' */
-  return 1;
+  int n = 0;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (;;) {
+    char *p = luaL_prepbuffer(&b);
+    if (!fgets(p, LUAL_BUFFERSIZE, f))  /* read fails? */
+      break;
+    n = strlen(p);
+    if (p[n-1] != '\n')
+      luaL_addsize(&b, n); 
+    else {
+      luaL_addsize(&b, n-1);  /* do not add the `\n' */
+      break;
+    }
+  }
+  luaL_pushresult(&b);  /* close buffer */
+  return (n > 0);  /* read something? */
 }
 
 
 static void read_file (lua_State *L, FILE *f) {
+  size_t len = 0;
+  size_t size = BUFSIZ;
+  char *buffer = NULL;
+  for (;;) {
+    char *newbuffer = (char *)realloc(buffer, size);
+    if (newbuffer == NULL) {
+      free(buffer);
+      lua_error(L, "not enough memory to read a file");
+    }
+    buffer = newbuffer;
+    len += fread(buffer+len, sizeof(char), size-len, f);
+    if (len < size) break;  /* did not read all it could */
+    size *= 2;
+  }
+  lua_pushlstring(L, buffer, len);
+  free(buffer);
+}
+
+
+static int read_chars (lua_State *L, FILE *f, size_t n) {
+  char *buffer;
+  size_t n1;
+  char statbuff[BUFSIZ];
+  if (n <= BUFSIZ)
+    buffer = statbuff;
+  else {
+    buffer = (char  *)malloc(n);
+    if (buffer == NULL)
+      lua_error(L, "not enough memory to read a file");
+  }
+  n1 = fread(buffer, sizeof(char), n, f);
+  lua_pushlstring(L, buffer, n1);
+  if (buffer != statbuff) free(buffer);
+  return (n1 > 0 || n == 0);
+}
+
+
+static int io_read (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  int lastarg = lua_gettop(L) - 1;
+  int firstarg = 1;
+  FILE *f = gethandle(L, ctrl, firstarg);
   int n;
-  do {
-    char *b = luaL_openspace(L, HUNK_FILE);
-    n = fread(b, sizeof(char), HUNK_FILE, f);
-    luaL_addsize(L, n);
-  } while (n==HUNK_FILE);
-}
-
-
-static int read_chars (lua_State *L, FILE *f, int n) {
-  char *b = luaL_openspace(L, n);
-  int n1 = fread(b, sizeof(char), n, f);
-  luaL_addsize(L, n1);
-  return (n == n1);
-}
-
-
-static void io_read (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  int arg = 2;
-  FILE *f = getfileparam(L, ctrl, &arg, INFILE);
-  lua_Object op = lua_getparam(L, arg);
-  do {  /* repeat for each part */
-    long l;
+  if (f) firstarg++;
+  else f = getfilebyref(L, ctrl, INFILE);  /* get _INPUT */
+  lua_pop(L, 1);
+  if (firstarg > lastarg) {  /* no arguments? */
+    lua_settop(L, 0);  /* erase upvalue and other eventual garbage */
+    firstarg = lastarg = 1;  /* correct indices */
+    lua_pushstring(L, "*l");  /* push default argument */
+  }
+  else  /* ensure stack space for all results and for auxlib's buffer */
+    luaL_checkstack(L, lastarg-firstarg+1+LUA_MINSTACK, "too many arguments");
+  for (n = firstarg; n<=lastarg; n++) {
     int success;
-    luaL_resetbuffer(L);
-    if (lua_isnumber(L, op))
-      success = read_chars(L, f, (int)lua_getnumber(L, op));
+    if (lua_isnumber(L, n))
+      success = read_chars(L, f, (size_t)lua_tonumber(L, n));
     else {
-      const char *p = luaL_opt_string(L, arg, "*l");
+      const char *p = luaL_check_string(L, n);
       if (p[0] != '*')
         success = read_pattern(L, f, p);  /* deprecated! */
       else {
         switch (p[1]) {
           case 'n':  /* number */
-            if (!read_number(L, f)) return;  /* read fails */
+            if (!read_number(L, f)) goto endloop;  /* read fails */
             continue;  /* number is already pushed; avoid the "pushstring" */
           case 'l':  /* line */
             success = read_line(L, f);
@@ -379,68 +415,78 @@ static void io_read (lua_State *L) {
             success = 1; /* always success */
             break;
           case 'w':  /* word */
-            read_word(L, f);
-            success = 0;  /* must read something to succeed */
+            success = read_word(L, f);
             break;
           default:
-            luaL_argerror(L, arg, "invalid format");
+            luaL_argerror(L, n, "invalid format");
             success = 0;  /* to avoid warnings */
         }
       }
     }
-    l = luaL_getsize(L);
-    if (!success && l==0) return;  /* read fails */
-    lua_pushlstring(L, luaL_buffer(L), l);
-  } while ((op = lua_getparam(L, ++arg)) != LUA_NOOBJECT);
+    if (!success) {
+      lua_pop(L, 1);  /* remove last result */
+      break;  /* read fails */
+    }
+  } endloop:
+  return n - firstarg;
 }
 
 /* }====================================================== */
 
 
-static void io_write (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  int arg = 2;
-  FILE *f = getfileparam(L, ctrl, &arg, OUTFILE);
+static int io_write (lua_State *L) {
+  int lastarg = lua_gettop(L) - 1;
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  int arg = 1;
   int status = 1;
-  lua_Object o;
-  while ((o = lua_getparam(L, arg)) != LUA_NOOBJECT) {
-    if (lua_type(L, o)[2] == 'm') {  /* nuMber? */  /* LUA_NUMBER */
+  FILE *f = gethandle(L, ctrl, arg);
+  if (f) arg++;
+  else f = getfilebyref(L, ctrl, OUTFILE);  /* get _OUTPUT */
+  for (; arg <=  lastarg; arg++) {
+    if (lua_type(L, arg) == LUA_TNUMBER) {  /* LUA_NUMBER */
       /* optimization: could be done exactly as for strings */
-      status = status && fprintf(f, "%.16g", lua_getnumber(L, o)) > 0;
+      status = status && fprintf(f, "%.16g", lua_tonumber(L, arg)) > 0;
     }
     else {
-      long l;
+      size_t l;
       const char *s = luaL_check_lstr(L, arg, &l);
-      status = status && ((long)fwrite(s, sizeof(char), l, f) == l);
+      status = status && (fwrite(s, sizeof(char), l, f) == l);
     }
-    arg++;
   }
   pushresult(L, status);
+  return 1;
 }
 
 
-static void io_seek (lua_State *L) {
+static int io_seek (lua_State *L) {
   static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
   static const char *const modenames[] = {"set", "cur", "end", NULL};
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  FILE *f = getnonullfile(L, ctrl, 2);
-  int op = luaL_findstring(luaL_opt_string(L, 3, "cur"), modenames);
-  long offset = luaL_opt_long(L, 4, 0);
-  luaL_arg_check(L, op != -1, 3, "invalid mode");
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *f;
+  int op;
+  long offset;
+  lua_pop(L, 1);  /* remove upvalue */
+  f = getnonullfile(L, ctrl, 1);
+  op = luaL_findstring(luaL_opt_string(L, 2, "cur"), modenames);
+  offset = luaL_opt_long(L, 3, 0);
+  luaL_arg_check(L, op != -1, 2, "invalid mode");
   op = fseek(f, offset, mode[op]);
   if (op)
-    pushresult(L, 0);  /* error */
-  else
+    return pushresult(L, 0);  /* error */
+  else {
     lua_pushnumber(L, ftell(f));
+    return 1;
+  }
 }
 
 
-static void io_flush (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)lua_getuserdata(L, lua_getparam(L, 1));
-  lua_Object of = lua_getparam(L, 2);
-  FILE *f = gethandle(L, ctrl, of);
-  luaL_arg_check(L, f || of == LUA_NOOBJECT, 2, "invalid file handle");
-  pushresult(L, fflush(f) == 0);
+static int io_flush (lua_State *L) {
+  IOCtrl *ctrl = (IOCtrl *)lua_touserdata(L, -1);
+  FILE *f;
+  lua_pop(L, 1);  /* remove upvalue */
+  f = gethandle(L, ctrl, 1);
+  luaL_arg_check(L, f || lua_isnull(L, 1), 1, "invalid file handle");
+  return pushresult(L, fflush(f) == 0);
 }
 
 /* }====================================================== */
@@ -452,39 +498,43 @@ static void io_flush (lua_State *L) {
 ** =======================================================
 */
 
-static void io_execute (lua_State *L) {
+static int io_execute (lua_State *L) {
   lua_pushnumber(L, system(luaL_check_string(L, 1)));
+  return 1;
 }
 
 
-static void io_remove (lua_State *L) {
-  pushresult(L, remove(luaL_check_string(L, 1)) == 0);
+static int io_remove (lua_State *L) {
+  return pushresult(L, remove(luaL_check_string(L, 1)) == 0);
 }
 
 
-static void io_rename (lua_State *L) {
-  pushresult(L, rename(luaL_check_string(L, 1),
+static int io_rename (lua_State *L) {
+  return pushresult(L, rename(luaL_check_string(L, 1),
                     luaL_check_string(L, 2)) == 0);
 }
 
 
-static void io_tmpname (lua_State *L) {
+static int io_tmpname (lua_State *L) {
   lua_pushstring(L, tmpnam(NULL));
+  return 1;
 }
 
 
 
-static void io_getenv (lua_State *L) {
+static int io_getenv (lua_State *L) {
   lua_pushstring(L, getenv(luaL_check_string(L, 1)));  /* if NULL push nil */
+  return 1;
 }
 
 
-static void io_clock (lua_State *L) {
+static int io_clock (lua_State *L) {
   lua_pushnumber(L, ((double)clock())/CLOCKS_PER_SEC);
+  return 1;
 }
 
 
-static void io_date (lua_State *L) {
+static int io_date (lua_State *L) {
   char b[256];
   const char *s = luaL_opt_string(L, 1, "%c");
   struct tm *stm;
@@ -494,10 +544,11 @@ static void io_date (lua_State *L) {
     lua_pushstring(L, b);
   else
     lua_error(L, "invalid `date' format");
+  return 1;
 }
 
 
-static void setloc (lua_State *L) {
+static int setloc (lua_State *L) {
   static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
                       LC_NUMERIC, LC_TIME};
   static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
@@ -505,87 +556,107 @@ static void setloc (lua_State *L) {
   int op = luaL_findstring(luaL_opt_string(L, 2, "all"), catnames);
   luaL_arg_check(L, op != -1, 2, "invalid option");
   lua_pushstring(L, setlocale(cat[op], luaL_check_string(L, 1)));
+  return 1;
 }
 
 
-static void io_exit (lua_State *L) {
+static int io_exit (lua_State *L) {
   exit(luaL_opt_int(L, 1, EXIT_SUCCESS));
+  return 0;  /* to avoid warnings */
 }
 
 /* }====================================================== */
 
 
 
-static void io_debug (lua_State *L) {
+static int io_debug (lua_State *L) {
   for (;;) {
     char buffer[250];
     fprintf(stderr, "lua_debug> ");
     if (fgets(buffer, sizeof(buffer), stdin) == 0 ||
         strcmp(buffer, "cont\n") == 0)
-      return;
+      return 0;
     lua_dostring(L, buffer);
+    lua_settop(L, 0);  /* remove eventual returns */
   }
 }
 
 
+#define LEVELS1	12	/* size of the first part of the stack */
+#define LEVELS2	10	/* size of the second part of the stack */
 
-#define MESSAGESIZE	150
-#define MAXMESSAGE (MESSAGESIZE*10)
-
-
-static void errorfb (lua_State *L) {
-  char buff[MAXMESSAGE];
+static int errorfb (lua_State *L) {
   int level = 1;  /* skip level 0 (it's this function) */
+  int firstpart = 1;  /* still before eventual `...' */
   lua_Debug ar;
-  lua_Object alertfunc = lua_rawgetglobal(L, "_ALERT");
-  sprintf(buff, "error: %.200s\n", lua_getstring(L, lua_getparam(L, 1)));
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  luaL_addstring(&b, "error: ");
+  luaL_addstring(&b, luaL_check_string(L, 1));
+  luaL_addstring(&b, "\n");
   while (lua_getstack(L, level++, &ar)) {
-    char buffchunk[60];
-    lua_getinfo(L, "Snl", &ar);
-    luaL_chunkid(buffchunk, ar.source, sizeof(buffchunk));
-    if (level == 2) strcat(buff, "stack traceback:\n");
-    strcat(buff, "  ");
-    if (strlen(buff) > MAXMESSAGE-MESSAGESIZE) {
-      strcat(buff, "...\n");
-      break;  /* buffer is full */
+    char buff[120];  /* enough to fit following `sprintf's */
+    if (level == 2)
+      luaL_addstring(&b, "stack traceback:\n");
+    else if (level > LEVELS1 && firstpart) {
+      /* no more than `LEVELS2' more levels? */
+      if (!lua_getstack(L, level+LEVELS2, &ar))
+        level--;  /* keep going */
+      else {
+        luaL_addstring(&b, "       ...\n");  /* too many levels */
+        while (lua_getstack(L, level+LEVELS2, &ar))  /* find last levels */
+          level++;
+      }
+      firstpart = 0;
+      continue;
     }
+    sprintf(buff, "%4d:  ", level-1);
+    luaL_addstring(&b, buff);
+    lua_getinfo(L, "Snl", &ar);
     switch (*ar.namewhat) {
       case 'g':  case 'l':  /* global, local */
-        sprintf(buff+strlen(buff), "function `%.50s'", ar.name);
+        sprintf(buff, "function `%.50s'", ar.name);
         break;
       case 'f':  /* field */
-        sprintf(buff+strlen(buff), "method `%.50s'", ar.name);
+        sprintf(buff, "method `%.50s'", ar.name);
         break;
       case 't':  /* tag method */
-        sprintf(buff+strlen(buff), "`%.50s' tag method", ar.name);
+        sprintf(buff, "`%.50s' tag method", ar.name);
         break;
       default: {
         if (*ar.what == 'm')  /* main? */
-          sprintf(buff+strlen(buff), "main of %.70s", buffchunk);
+          sprintf(buff, "main of %.70s", ar.short_src);
         else if (*ar.what == 'C')  /* C function? */
-          sprintf(buff+strlen(buff), "%.70s", buffchunk);
+          sprintf(buff, "%.70s", ar.short_src);
         else
-          sprintf(buff+strlen(buff), "function <%d:%.70s>",
-                  ar.linedefined, buffchunk);
-        ar.source = NULL;
+          sprintf(buff, "function <%d:%.70s>", ar.linedefined, ar.short_src);
+        ar.source = NULL;  /* do not print source again */
       }
     }
-    if (ar.currentline > 0)
-      sprintf(buff+strlen(buff), " at line %d", ar.currentline);
-    if (ar.source)
-      sprintf(buff+strlen(buff), " [%.70s]", buffchunk);
-    strcat(buff, "\n");
+    luaL_addstring(&b, buff);
+    if (ar.currentline > 0) {
+      sprintf(buff, " at line %d", ar.currentline);
+      luaL_addstring(&b, buff);
+    }
+    if (ar.source) {
+      sprintf(buff, " [%.70s]", ar.short_src);
+      luaL_addstring(&b, buff);
+    }
+    luaL_addstring(&b, "\n");
   }
-  if (lua_isfunction(L, alertfunc)) {  /* avoid loop if _ALERT is not defined */
-    lua_pushstring(L, buff);
-    lua_callfunction(L, alertfunc);
+  luaL_pushresult(&b);
+  lua_getglobal(L, LUA_ALERT);
+  if (lua_isfunction(L, -1)) {  /* avoid loop if _ALERT is not defined */
+    lua_pushvalue(L, -2);  /* error message */
+    lua_rawcall(L, 1, 0);
   }
+  return 0;
 }
 
 
 
 static const struct luaL_reg iolib[] = {
-  {"_ERRORMESSAGE", errorfb},
+  {LUA_ERRORMESSAGE, errorfb},
   {"clock",     io_clock},
   {"date",     io_date},
   {"debug",    io_debug},
@@ -613,36 +684,34 @@ static const struct luaL_reg iolibtag[] = {
 
 
 static void openwithcontrol (lua_State *L) {
-  IOCtrl *ctrl = (IOCtrl *)malloc(sizeof(IOCtrl));
+  IOCtrl *ctrl = (IOCtrl *)lua_newuserdata(L, sizeof(IOCtrl));
   unsigned int i;
-  int ctrltag = lua_newtag(L);
   ctrl->iotag = lua_newtag(L);
   ctrl->closedtag = lua_newtag(L);
   for (i=0; i<sizeof(iolibtag)/sizeof(iolibtag[0]); i++) {
     /* put `ctrl' as upvalue for these functions */
-    lua_pushusertag(L, ctrl, ctrltag);
+    lua_pushvalue(L, -1);
     lua_pushcclosure(L, iolibtag[i].func, 1);
     lua_setglobal(L, iolibtag[i].name);
   }
+  /* create references to variable names */
+  lua_pushstring(L, filenames[INFILE]);
+  ctrl->ref[INFILE] = lua_ref(L, 1);
+  lua_pushstring(L, filenames[OUTFILE]);
+  ctrl->ref[OUTFILE] = lua_ref(L, 1);
   /* predefined file handles */
-  ctrl->file[INFILE] = stdin;
   setfile(L, ctrl, stdin, INFILE);
-  ctrl->file[OUTFILE] = stdout;
   setfile(L, ctrl, stdout, OUTFILE);
   setfilebyname(L, ctrl, stdin, "_STDIN");
   setfilebyname(L, ctrl, stdout, "_STDOUT");
   setfilebyname(L, ctrl, stderr, "_STDERR");
-  /* change file when assigned */
-  lua_pushusertag(L, ctrl, ctrltag);
-  lua_pushcclosure(L, atribTM, 1); 
-  lua_settagmethod(L, ctrl->iotag, "setglobal");
-  /* delete `ctrl' when collected */
-  lua_pushusertag(L, ctrl, ctrltag);
-  lua_pushcclosure(L, ctrl_collect, 1); 
-  lua_settagmethod(L, ctrltag, "gc");
+  /* close files when collected */
+  lua_pushcclosure(L, file_collect, 1);  /* pops `ctrl' from stack */
+  lua_settagmethod(L, ctrl->iotag, "gc");
 }
 
-void lua_iolibopen (lua_State *L) {
+
+LUALIB_API void lua_iolibopen (lua_State *L) {
   luaL_openl(L, iolib);
   openwithcontrol(L);
 }

llex.c

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.c,v 1.56 2000/04/07 13:11:49 roberto Exp roberto $
+** $Id: llex.c,v 1.71 2000/09/27 17:41:58 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -9,15 +9,15 @@
 #include <stdio.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
-#include "lauxlib.h"
 #include "llex.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lparser.h"
 #include "lstate.h"
 #include "lstring.h"
+#include "ltable.h"
 #include "luadebug.h"
 #include "lzio.h"
 
@@ -26,9 +26,6 @@
 #define next(LS) (LS->current = zgetc(LS->z))
 
 
-#define save(L, c)	luaL_addchar(L, c)
-#define save_and_next(L, LS)  (save(L, LS->current), next(LS))
-
 
 /* ORDER RESERVED */
 static const char *const token2string [] = {
@@ -48,10 +45,20 @@ void luaX_init (lua_State *L) {
 
 #define MAXSRC          80
 
+
+void luaX_checklimit (LexState *ls, int val, int limit, const char *msg) {
+  if (val > limit) {
+    char buff[100];
+    sprintf(buff, "too many %.50s (limit=%d)", msg, limit);
+    luaX_error(ls, buff, ls->t.token);
+  }
+}
+
+
 void luaX_syntaxerror (LexState *ls, const char *s, const char *token) {
   char buff[MAXSRC];
-  luaL_chunkid(buff, zname(ls->z), sizeof(buff));
-  luaL_verror(ls->L, "%.100s;\n  last token read: `%.50s' at line %d in %.80s",
+  luaO_chunkid(buff, ls->source->str, sizeof(buff));
+  luaO_verror(ls->L, "%.99s;\n  last token read: `%.30s' at line %d in %.80s",
               s, token, ls->linenumber, buff);
 }
 
@@ -59,10 +66,8 @@ void luaX_syntaxerror (LexState *ls, const char *s, const char *token) {
 void luaX_error (LexState *ls, const char *s, int token) {
   char buff[TOKEN_LEN];
   luaX_token2str(token, buff);
-  if (buff[0] == '\0') {
-    save(ls->L, '\0');
-    luaX_syntaxerror(ls, s, luaL_buffer(ls->L));
-  }
+  if (buff[0] == '\0')
+    luaX_syntaxerror(ls, s, ls->L->Mbuffer);
   else
     luaX_syntaxerror(ls, s, buff);
 }
@@ -85,140 +90,26 @@ static void luaX_invalidchar (LexState *ls, int c) {
 }
 
 
-static void firstline (LexState *LS)
-{
-  int c = zgetc(LS->z);
-  if (c == '#')
-    while ((c=zgetc(LS->z)) != '\n' && c != EOZ) /* skip first line */;
-  zungetc(LS->z);
-}
-
-
-void luaX_setinput (lua_State *L, LexState *LS, ZIO *z) {
-  LS->L = L;
-  LS->current = '\n';
-  LS->linenumber = 0;
-  LS->iflevel = 0;
-  LS->ifstate[0].skip = 0;
-  LS->ifstate[0].elsepart = 1;  /* to avoid a free $else */
-  LS->z = z;
-  LS->fs = NULL;
-  firstline(LS);
-  luaL_resetbuffer(L);
-}
-
-
-
-/*
-** =======================================================
-** PRAGMAS
-** =======================================================
-*/
-
-static void skipspace (LexState *LS) {
-  while (LS->current == ' ' || LS->current == '\t' || LS->current == '\r')
-    next(LS);
-}
-
-
-static int checkcond (lua_State *L, LexState *LS, const char *buff) {
-  static const char *const opts[] = {"nil", "1", NULL};
-  int i = luaL_findstring(buff, opts);
-  if (i >= 0) return i;
-  else if (isalpha((unsigned char)buff[0]) || buff[0] == '_')
-    return luaS_globaldefined(L, buff);
-  else {
-    luaX_syntaxerror(LS, "invalid $if condition", buff);
-    return 0;  /* to avoid warnings */
-  }
-}
-
-
-static void readname (LexState *LS, char *buff) {
-  int i = 0;
-  skipspace(LS);
-  while (isalnum(LS->current) || LS->current == '_') {
-    if (i >= PRAGMASIZE) {
-      buff[PRAGMASIZE] = 0;
-      luaX_syntaxerror(LS, "pragma too long", buff);
-    }
-    buff[i++] = (char)LS->current;
-    next(LS);
-  }
-  buff[i] = 0;
-}
-
-
-static void inclinenumber (lua_State *L, LexState *LS);
-
-
-static void ifskip (lua_State *L, LexState *LS) {
-  while (LS->ifstate[LS->iflevel].skip) {
-    if (LS->current == '\n')
-      inclinenumber(L, LS);
-    else if (LS->current == EOZ)
-      luaX_error(LS, "input ends inside a $if", TK_EOS);
-    else next(LS);
-  }
-}
-
-
-static void inclinenumber (lua_State *L, LexState *LS) {
-  static const char *const pragmas [] =
-    {"debug", "nodebug", "endinput", "end", "ifnot", "if", "else", NULL};
+static void inclinenumber (LexState *LS) {
   next(LS);  /* skip '\n' */
   ++LS->linenumber;
-  if (LS->current == '$') {  /* is a pragma? */
-    char buff[PRAGMASIZE+1];
-    int ifnot = 0;
-    int skip = LS->ifstate[LS->iflevel].skip;
-    next(LS);  /* skip $ */
-    readname(LS, buff);
-    switch (luaL_findstring(buff, pragmas)) {
-      case 0:  /* debug */
-        if (!skip) L->debug = 1;
-        break;
-      case 1:  /* nodebug */
-        if (!skip) L->debug = 0;
-        break;
-      case 2:  /* endinput */
-        if (!skip) {
-          LS->current = EOZ;
-          LS->iflevel = 0;  /* to allow $endinput inside a $if */
-        }
-        break;
-      case 3:  /* end */
-        if (LS->iflevel-- == 0)
-          luaX_syntaxerror(LS, "unmatched $end", "$end");
-        break;
-      case 4:  /* ifnot */
-        ifnot = 1;
-        /* go through */
-      case 5:  /* if */
-        if (LS->iflevel == MAX_IFS-1)
-          luaX_syntaxerror(LS, "too many nested $ifs", "$if");
-        readname(LS, buff);
-        LS->iflevel++;
-        LS->ifstate[LS->iflevel].elsepart = 0;
-        LS->ifstate[LS->iflevel].condition = checkcond(L, LS, buff) ? !ifnot : ifnot;
-        LS->ifstate[LS->iflevel].skip = skip || !LS->ifstate[LS->iflevel].condition;
-        break;
-      case 6:  /* else */
-        if (LS->ifstate[LS->iflevel].elsepart)
-          luaX_syntaxerror(LS, "unmatched $else", "$else");
-        LS->ifstate[LS->iflevel].elsepart = 1;
-        LS->ifstate[LS->iflevel].skip = LS->ifstate[LS->iflevel-1].skip ||
-                                      LS->ifstate[LS->iflevel].condition;
-        break;
-      default:
-        luaX_syntaxerror(LS, "unknown pragma", buff);
-    }
-    skipspace(LS);
-    if (LS->current == '\n')  /* pragma must end with a '\n' ... */
-      inclinenumber(L, LS);
-    else if (LS->current != EOZ)  /* or eof */
-      luaX_syntaxerror(LS, "invalid pragma format", buff);
-    ifskip(L, LS);
+  luaX_checklimit(LS, LS->linenumber, MAX_INT, "lines in a chunk");
+}
+
+
+void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source) {
+  LS->L = L;
+  LS->lookahead.token = TK_EOS;  /* no look-ahead token */
+  LS->z = z;
+  LS->fs = NULL;
+  LS->linenumber = 1;
+  LS->lastline = 1;
+  LS->source = source;
+  next(LS);  /* read first char */
+  if (LS->current == '#') {
+    do {  /* skip first line */
+      next(LS);
+    } while (LS->current != '\n' && LS->current != EOZ);
   }
 }
 
@@ -231,61 +122,133 @@ static void inclinenumber (lua_State *L, LexState *LS) {
 */
 
 
+/* use Mbuffer to store names, literal strings and numbers */
 
-static void read_long_string (lua_State *L, LexState *LS) {
-  int cont = 0;
-  for (;;) {
-    switch (LS->current) {
-      case EOZ:
-        luaX_error(LS, "unfinished long string", TK_STRING);
-        break;  /* to avoid warnings */
-      case '[':
-        save_and_next(L, LS);
-        if (LS->current == '[') {
-          cont++;
-          save_and_next(L, LS);
-        }
-        continue;
-      case ']':
-        save_and_next(L, LS);
-        if (LS->current == ']') {
-          if (cont == 0) goto endloop;
-          cont--;
-          save_and_next(L, LS);
-        }
-        continue;
-      case '\n':
-        save(L, '\n');
-        inclinenumber(L, LS);
-        continue;
-      default:
-        save_and_next(L, LS);
-    }
-  } endloop:
-  save_and_next(L, LS);  /* skip the second ']' */
-  LS->seminfo.ts = luaS_newlstr(L, L->Mbuffer+(L->Mbuffbase+2),
-                          L->Mbuffnext-L->Mbuffbase-4);
+#define EXTRABUFF	128
+#define checkbuffer(L, n, len)	if ((len)+(n) > L->Mbuffsize) \
+                                  luaO_openspace(L, (len)+(n)+EXTRABUFF)
+
+#define save(L, c, l)	(L->Mbuffer[l++] = (char)c)
+#define save_and_next(L, LS, l)  (save(L, LS->current, l), next(LS))
+
+
+static const char *readname (LexState *LS) {
+  lua_State *L = LS->L;
+  size_t l = 0;
+  checkbuffer(L, 10, l);
+  do {
+    checkbuffer(L, 10, l);
+    save_and_next(L, LS, l);
+  } while (isalnum(LS->current) || LS->current == '_');
+  save(L, '\0', l);
+  return L->Mbuffer;
 }
 
 
-static void read_string (lua_State *L, LexState *LS, int del) {
-  save_and_next(L, LS);
+/* LUA_NUMBER */
+static void read_number (LexState *LS, int comma, SemInfo *seminfo) {
+  lua_State *L = LS->L;
+  size_t l = 0;
+  checkbuffer(L, 10, l);
+  if (comma) save(L, '.', l);
+  while (isdigit(LS->current)) {
+    checkbuffer(L, 10, l);
+    save_and_next(L, LS, l);
+  }
+  if (LS->current == '.') {
+    save_and_next(L, LS, l);
+    if (LS->current == '.') {
+      save_and_next(L, LS, l);
+      save(L, '\0', l);
+      luaX_error(LS, "ambiguous syntax"
+           " (decimal point x string concatenation)", TK_NUMBER);
+    }
+  }
+  while (isdigit(LS->current)) {
+    checkbuffer(L, 10, l);
+    save_and_next(L, LS, l);
+  }
+  if (LS->current == 'e' || LS->current == 'E') {
+    save_and_next(L, LS, l);  /* read 'E' */
+    if (LS->current == '+' || LS->current == '-')
+      save_and_next(L, LS, l);  /* optional exponent sign */
+    while (isdigit(LS->current)) {
+      checkbuffer(L, 10, l);
+      save_and_next(L, LS, l);
+    }
+  }
+  save(L, '\0', l);
+  if (!luaO_str2d(L->Mbuffer, &seminfo->r))
+    luaX_error(LS, "malformed number", TK_NUMBER);
+}
+
+
+static void read_long_string (LexState *LS, SemInfo *seminfo) {
+  lua_State *L = LS->L;
+  int cont = 0;
+  size_t l = 0;
+  checkbuffer(L, 10, l);
+  save(L, '[', l);  /* save first '[' */
+  save_and_next(L, LS, l);  /* pass the second '[' */
+  for (;;) {
+    checkbuffer(L, 10, l);
+    switch (LS->current) {
+      case EOZ:
+        save(L, '\0', l);
+        luaX_error(LS, "unfinished long string", TK_STRING);
+        break;  /* to avoid warnings */
+      case '[':
+        save_and_next(L, LS, l);
+        if (LS->current == '[') {
+          cont++;
+          save_and_next(L, LS, l);
+        }
+        continue;
+      case ']':
+        save_and_next(L, LS, l);
+        if (LS->current == ']') {
+          if (cont == 0) goto endloop;
+          cont--;
+          save_and_next(L, LS, l);
+        }
+        continue;
+      case '\n':
+        save(L, '\n', l);
+        inclinenumber(LS);
+        continue;
+      default:
+        save_and_next(L, LS, l);
+    }
+  } endloop:
+  save_and_next(L, LS, l);  /* skip the second ']' */
+  save(L, '\0', l);
+  seminfo->ts = luaS_newlstr(L, L->Mbuffer+2, l-5);
+}
+
+
+static void read_string (LexState *LS, int del, SemInfo *seminfo) {
+  lua_State *L = LS->L;
+  size_t l = 0;
+  checkbuffer(L, 10, l);
+  save_and_next(L, LS, l);
   while (LS->current != del) {
+    checkbuffer(L, 10, l);
     switch (LS->current) {
       case EOZ:  case '\n':
+        save(L, '\0', l);
         luaX_error(LS, "unfinished string", TK_STRING);
         break;  /* to avoid warnings */
       case '\\':
         next(LS);  /* do not save the '\' */
         switch (LS->current) {
-          case 'a': save(L, '\a'); next(LS); break;
-          case 'b': save(L, '\b'); next(LS); break;
-          case 'f': save(L, '\f'); next(LS); break;
-          case 'n': save(L, '\n'); next(LS); break;
-          case 'r': save(L, '\r'); next(LS); break;
-          case 't': save(L, '\t'); next(LS); break;
-          case 'v': save(L, '\v'); next(LS); break;
-          case '\n': save(L, '\n'); inclinenumber(L, LS); break;
+          case 'a': save(L, '\a', l); next(LS); break;
+          case 'b': save(L, '\b', l); next(LS); break;
+          case 'f': save(L, '\f', l); next(LS); break;
+          case 'n': save(L, '\n', l); next(LS); break;
+          case 'r': save(L, '\r', l); next(LS); break;
+          case 't': save(L, '\t', l); next(LS); break;
+          case 'v': save(L, '\v', l); next(LS); break;
+          case '\n': save(L, '\n', l); inclinenumber(LS); break;
           case '0': case '1': case '2': case '3': case '4':
           case '5': case '6': case '7': case '8': case '9': {
             int c = 0;
@@ -294,28 +257,28 @@ static void read_string (lua_State *L, LexState *LS, int del) {
               c = 10*c + (LS->current-'0');
               next(LS);
             } while (++i<3 && isdigit(LS->current));
-            if (c != (unsigned char)c)
+            if (c != (unsigned char)c) {
+              save(L, '\0', l);
               luaX_error(LS, "escape sequence too large", TK_STRING);
-            save(L, c);
+            }
+            save(L, c, l);
             break;
           }
           default:  /* handles \\, \", \', and \? */
-            save(L, LS->current);
-            next(LS);
+            save_and_next(L, LS, l);
         }
         break;
       default:
-        save_and_next(L, LS);
+        save_and_next(L, LS, l);
     }
   }
-  save_and_next(L, LS);  /* skip delimiter */
-  LS->seminfo.ts = luaS_newlstr(L, L->Mbuffer+(L->Mbuffbase+1),
-                          L->Mbuffnext-L->Mbuffbase-2);
+  save_and_next(L, LS, l);  /* skip delimiter */
+  save(L, '\0', l);
+  seminfo->ts = luaS_newlstr(L, L->Mbuffer+1, l-3);
 }
 
 
-int luaX_lex (LexState *LS) {
-  lua_State *L = LS->L;
+int luaX_lex (LexState *LS, SemInfo *seminfo) {
   for (;;) {
     switch (LS->current) {
 
@@ -324,9 +287,13 @@ int luaX_lex (LexState *LS) {
         continue;
 
       case '\n':
-        inclinenumber(L, LS);
+        inclinenumber(LS);
         continue;
 
+      case '$':
+        luaX_error(LS, "unexpected `$' (pragmas are no longer supported)", '$');
+        break;
+
       case '-':
         next(LS);
         if (LS->current != '-') return '-';
@@ -334,12 +301,10 @@ int luaX_lex (LexState *LS) {
         continue;
 
       case '[':
-        luaL_resetbuffer(L);
-        save_and_next(L, LS);
+        next(LS);
         if (LS->current != '[') return '[';
         else {
-          save_and_next(L, LS);  /* pass the second '[' */
-          read_long_string(L, LS);
+          read_long_string(LS, seminfo);
           return TK_STRING;
         }
 
@@ -365,13 +330,11 @@ int luaX_lex (LexState *LS) {
 
       case '"':
       case '\'':
-        luaL_resetbuffer(L);
-        read_string(L, LS, LS->current);
+        read_string(LS, LS->current, seminfo);
         return TK_STRING;
 
       case '.':
-        luaL_resetbuffer(L);
-        save_and_next(L, LS);
+        next(LS);
         if (LS->current == '.') {
           next(LS);
           if (LS->current == '.') {
@@ -381,40 +344,17 @@ int luaX_lex (LexState *LS) {
           else return TK_CONCAT;   /* .. */
         }
         else if (!isdigit(LS->current)) return '.';
-        else goto fraction;  /* LS->current is a digit */
+        else {
+          read_number(LS, 1, seminfo);
+          return TK_NUMBER;
+        }
 
       case '0': case '1': case '2': case '3': case '4':
       case '5': case '6': case '7': case '8': case '9':
-        luaL_resetbuffer(L);
-        do {
-          save_and_next(L, LS);
-        } while (isdigit(LS->current));
-        if (LS->current == '.') {
-          save_and_next(L, LS);
-          if (LS->current == '.') {
-            save(L, '.');
-            luaX_error(LS, "ambiguous syntax"
-                       " (decimal point x string concatenation)", TK_NUMBER);
-          }
-        }
-      fraction:  /* LUA_NUMBER */
-        while (isdigit(LS->current))
-          save_and_next(L, LS);
-        if (LS->current == 'e' || LS->current == 'E') {
-          save_and_next(L, LS);  /* read 'E' */
-          if (LS->current == '+' || LS->current == '-')
-            save_and_next(L, LS);  /* optional exponent sign */
-          while (isdigit(LS->current))
-            save_and_next(L, LS);
-        }
-        save(L, '\0');
-        if (!luaO_str2d(L->Mbuffer+L->Mbuffbase, &LS->seminfo.r))
-          luaX_error(LS, "malformed number", TK_NUMBER);
+        read_number(LS, 0, seminfo);
         return TK_NUMBER;
 
       case EOZ:
-        if (LS->iflevel > 0)
-          luaX_error(LS, "input ends inside a $if", TK_EOS);
         return TK_EOS;
 
       case '_': goto tname;
@@ -428,16 +368,10 @@ int luaX_lex (LexState *LS) {
           return c;
         }
         tname: {  /* identifier or reserved word */
-          TString *ts;
-          luaL_resetbuffer(L);
-          do {
-            save_and_next(L, LS);
-          } while (isalnum(LS->current) || LS->current == '_');
-          save(L, '\0');
-          ts = luaS_new(L, L->Mbuffer+L->Mbuffbase);
+          TString *ts = luaS_new(LS->L, readname(LS));
           if (ts->marked >= RESERVEDMARK)  /* reserved word? */
             return ts->marked-RESERVEDMARK+FIRST_RESERVED;
-          LS->seminfo.ts = ts;
+          seminfo->ts = ts;
           return TK_NAME;
         }
     }

llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h,v 1.23 2000/04/07 13:11:49 roberto Exp roberto $
+** $Id: llex.h,v 1.30 2000/06/21 18:13:56 roberto Exp roberto $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -35,34 +35,35 @@ enum RESERVED {
 #define NUM_RESERVED	((int)(TK_WHILE-FIRST_RESERVED+1))
 
 
-/* `ifState' keeps the state of each nested $if the lexical is dealing with. */
+typedef union {
+  Number r;
+  TString *ts;
+} SemInfo;  /* semantics information */
 
-struct ifState {
-  int elsepart;  /* true if it's in the $else part */
-  int condition;  /* true if $if condition is true */
-  int skip;  /* true if part must be skipped */
-};
+
+typedef struct Token {
+  int token;
+  SemInfo seminfo;
+} Token;
 
 
 typedef struct LexState {
-  int current;  /* look ahead character */
-  int token;  /* look ahead token */
+  int current;  /* current character */
+  Token t;  /* current token */
+  Token lookahead;  /* look ahead token */
   struct FuncState *fs;  /* `FuncState' is private to the parser */
   struct lua_State *L;
-  union {
-    Number r;
-    TString *ts;
-  } seminfo;  /* semantics information */
   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];
+  int lastline;  /* line of last token `consumed' */
+  TString *source;  /* current source name */
 } LexState;
 
 
 void luaX_init (lua_State *L);
-void luaX_setinput (lua_State *L, LexState *LS, ZIO *z);
-int luaX_lex (LexState *LS);
+void luaX_setinput (lua_State *L, LexState *LS, ZIO *z, TString *source);
+int luaX_lex (LexState *LS, SemInfo *seminfo);
+void luaX_checklimit (LexState *ls, int val, int limit, const char *msg);
 void luaX_syntaxerror (LexState *ls, const char *s, const char *token);
 void luaX_error (LexState *ls, const char *s, int token);
 void luaX_token2str (int token, char *s);

llimits.h

@@ -1,6 +1,6 @@
 /*
-** $Id: llimits.h,v 1.4 2000/03/31 16:28:45 roberto Exp roberto $
-** Limits, basic types, and some other "instalation-dependent" definitions
+** $Id: llimits.h,v 1.18 2000/10/09 13:47:32 roberto Exp roberto $
+** Limits, basic types, and some other "installation-dependent" definitions
 ** See Copyright Notice in lua.h
 */
 
@@ -9,6 +9,26 @@
 
 
 #include <limits.h>
+#include <stddef.h>
+
+
+
+/*
+** try to find number of bits in an integer
+*/
+#ifndef BITS_INT
+/* avoid overflows in comparison */
+#if INT_MAX-20 < 32760
+#define	BITS_INT	16
+#else
+#if INT_MAX > 2147483640L
+/* machine has at least 32 bits */
+#define BITS_INT	32
+#else
+#error "you must define BITS_INT with number of bits in an integer"
+#endif
+#endif
+#endif
 
 
 /*
@@ -21,6 +41,19 @@
 
 typedef LUA_NUM_TYPE Number;
 
+/* function to convert a Number to a string */
+#define NUMBER_FMT	"%.16g"		/* LUA_NUMBER */
+#define lua_number2str(s,n)	sprintf((s), NUMBER_FMT, (n))
+
+/* function to convert a string to a Number */
+#define lua_str2number(s,p)	strtod((s), (p))
+
+
+
+typedef unsigned long lint32;  /* unsigned int with at least 32 bits */
+
+
+#define MAX_SIZET	((size_t)(~(size_t)0)-2)
 
 
 #define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
@@ -29,16 +62,9 @@ typedef LUA_NUM_TYPE Number;
 ** conversion of pointer to int (for hashing only)
 ** (the shift removes bits that are usually 0 because of alignment)
 */
-#define IntPoint(L, p)  (((unsigned long)(p)) >> 3)
+#define IntPoint(p)  (((unsigned long)(p)) >> 3)
 
 
-/*
-** number of `blocks' for garbage collection: each reference to other
-** objects count 1, and each 32 bytes of `raw' memory count 1; we add
-** 2 to the total as a minimum (and also to count the overhead of malloc)
-*/
-#define numblocks(L, o,b)       ((o)+((b)>>5)+2)
-
 
 #define MINPOWER2       4       /* minimum size for "growing" vectors */
 
@@ -50,9 +76,14 @@ typedef LUA_NUM_TYPE Number;
 
 
 
+/* type to ensure maximum alignment */
+union L_Umaxalign { double d; char *s; long l; };
+
+
+
 /*
 ** type for virtual-machine instructions
-** must be an unsigned with 4 bytes (see details in lopcodes.h)
+** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
 ** For a very small machine, you may change that to 2 bytes (and adjust
 ** the following limits accordingly)
 */
@@ -60,51 +91,56 @@ typedef unsigned long Instruction;
 
 
 /*
-** limits for opcode arguments.
+** size and position of opcode arguments.
 ** For an instruction with 2 bytes, size is 16, and size_b can be 5
+** (accordingly, size_u will be 10, and size_a will be 5)
 */
 #define SIZE_INSTRUCTION        32
-#define SIZE_OP         6
 #define SIZE_B          9
 
+#define SIZE_OP         6
 #define SIZE_U          (SIZE_INSTRUCTION-SIZE_OP)
 #define POS_U           SIZE_OP
 #define POS_B           SIZE_OP
 #define SIZE_A          (SIZE_INSTRUCTION-(SIZE_OP+SIZE_B))
 #define POS_A           (SIZE_OP+SIZE_B)
 
-#define MAXARG_U        ((1<<SIZE_U)-1)
-#define MAXARG_S        (MAXARG_U>>1)		/* `S' is signed */
-#define MAXARG_A        ((1<<SIZE_A)-1)
-#define MAXARG_B        ((1<<SIZE_B)-1)
-
 
 /*
-** we use int to manipulate most arguments, so they must fit
+** limits for opcode arguments.
+** we use (signed) int to manipulate most arguments,
+** so they must fit in BITS_INT-1 bits (-1 for sign)
 */
-#if MAXARG_U > MAX_INT
-#undef MAXARG_U
+#if SIZE_U < BITS_INT-1
+#define MAXARG_U        ((1<<SIZE_U)-1)
+#define MAXARG_S        (MAXARG_U>>1)		/* `S' is signed */
+#else
 #define MAXARG_U        MAX_INT
-#endif
-
-#if MAXARG_S > MAX_INT
-#undef MAXARG_S
 #define MAXARG_S        MAX_INT
 #endif
 
-#if MAXARG_A > MAX_INT
-#undef MAXARG_A
+#if SIZE_A < BITS_INT-1
+#define MAXARG_A        ((1<<SIZE_A)-1)
+#else
 #define MAXARG_A        MAX_INT
 #endif
 
-#if MAXARG_B > MAX_INT
-#undef MAXARG_B
+#if SIZE_B < BITS_INT-1
+#define MAXARG_B        ((1<<SIZE_B)-1)
+#else
 #define MAXARG_B        MAX_INT
 #endif
 
 
 /* maximum stack size in a function */
+#ifndef MAXSTACK
+#define MAXSTACK	250
+#endif
+
+#if MAXSTACK > MAXARG_B
+#undef MAXSTACK
 #define MAXSTACK	MAXARG_B
+#endif
 
 
 /* maximum number of local variables */
@@ -127,14 +163,6 @@ typedef unsigned long Instruction;
 #endif
 
 
-/* special code for multiple returns */
-#define MULT_RET        255	/* (<=MAXARG_B) */
-#if MULT_RET>MAXARG_B
-#undef MULT_RET
-#define MULT_RET	MAXARG_B
-#endif
-
-
 /* maximum number of variables in the left side of an assignment */
 #ifndef MAXVARSLH
 #define MAXVARSLH 100           /* arbitrary limit (<MULT_RET) */
@@ -167,24 +195,6 @@ typedef unsigned long Instruction;
 #define RFIELDS_PER_FLUSH	(LFIELDS_PER_FLUSH/2)
 
 
-/* maximum number of values printed in one call to `print' */
-#ifndef MAXPRINT
-#define MAXPRINT        40	/* arbitrary limit */
-#endif
-
-
-/* maximum depth of nested $ifs */
-#ifndef MAX_IFS
-#define MAX_IFS 5  /* arbitrary limit */
-#endif
-
-
-/* maximum size of a pragma line */
-#ifndef PRAGMASIZE
-#define PRAGMASIZE      80  /* arbitrary limit */
-#endif
-
-
 /* maximum lookback to find a real constant (for code generation) */
 #ifndef LOOKBACKNUMS
 #define LOOKBACKNUMS    20      /* arbitrary constant */

lmathlib.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.23 1999/12/27 17:33:22 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.31 2000/10/27 16:15:53 roberto Exp roberto $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -8,10 +8,9 @@
 #include <stdlib.h>
 #include <math.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lauxlib.h"
-#include "lua.h"
 #include "lualib.h"
 
 
@@ -34,138 +33,169 @@
 #endif
 
 
-static void math_abs (lua_State *L) {
+static int math_abs (lua_State *L) {
   lua_pushnumber(L, fabs(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_sin (lua_State *L) {
+static int math_sin (lua_State *L) {
   lua_pushnumber(L, sin(TORAD(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_cos (lua_State *L) {
+static int math_cos (lua_State *L) {
   lua_pushnumber(L, cos(TORAD(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_tan (lua_State *L) {
+static int math_tan (lua_State *L) {
   lua_pushnumber(L, tan(TORAD(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_asin (lua_State *L) {
+static int math_asin (lua_State *L) {
   lua_pushnumber(L, FROMRAD(asin(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_acos (lua_State *L) {
+static int math_acos (lua_State *L) {
   lua_pushnumber(L, FROMRAD(acos(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_atan (lua_State *L) {
+static int math_atan (lua_State *L) {
   lua_pushnumber(L, FROMRAD(atan(luaL_check_number(L, 1))));
+  return 1;
 }
 
-static void math_atan2 (lua_State *L) {
+static int math_atan2 (lua_State *L) {
   lua_pushnumber(L, FROMRAD(atan2(luaL_check_number(L, 1), luaL_check_number(L, 2))));
+  return 1;
 }
 
-static void math_ceil (lua_State *L) {
+static int math_ceil (lua_State *L) {
   lua_pushnumber(L, ceil(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_floor (lua_State *L) {
+static int math_floor (lua_State *L) {
   lua_pushnumber(L, floor(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_mod (lua_State *L) {
+static int math_mod (lua_State *L) {
   lua_pushnumber(L, fmod(luaL_check_number(L, 1), luaL_check_number(L, 2)));
+  return 1;
 }
 
-static void math_sqrt (lua_State *L) {
+static int math_sqrt (lua_State *L) {
   lua_pushnumber(L, sqrt(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_pow (lua_State *L) {
+static int math_pow (lua_State *L) {
   lua_pushnumber(L, pow(luaL_check_number(L, 1), luaL_check_number(L, 2)));
+  return 1;
 }
 
-static void math_log (lua_State *L) {
+static int math_log (lua_State *L) {
   lua_pushnumber(L, log(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_log10 (lua_State *L) {
+static int math_log10 (lua_State *L) {
   lua_pushnumber(L, log10(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_exp (lua_State *L) {
+static int math_exp (lua_State *L) {
   lua_pushnumber(L, exp(luaL_check_number(L, 1)));
+  return 1;
 }
 
-static void math_deg (lua_State *L) {
+static int math_deg (lua_State *L) {
   lua_pushnumber(L, luaL_check_number(L, 1)/RADIANS_PER_DEGREE);
+  return 1;
 }
 
-static void math_rad (lua_State *L) {
+static int math_rad (lua_State *L) {
   lua_pushnumber(L, luaL_check_number(L, 1)*RADIANS_PER_DEGREE);
+  return 1;
 }
 
-static void math_frexp (lua_State *L) {
+static int math_frexp (lua_State *L) {
   int e;
   lua_pushnumber(L, frexp(luaL_check_number(L, 1), &e));
   lua_pushnumber(L, e);
+  return 2;
 }
 
-static void math_ldexp (lua_State *L) {
+static int math_ldexp (lua_State *L) {
   lua_pushnumber(L, ldexp(luaL_check_number(L, 1), luaL_check_int(L, 2)));
+  return 1;
 }
 
 
 
-static void math_min (lua_State *L) {
-  int i = 1;
-  double dmin = luaL_check_number(L, i);
-  while (lua_getparam(L, ++i) != LUA_NOOBJECT) {
+static int math_min (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  double dmin = luaL_check_number(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
     double d = luaL_check_number(L, i);
     if (d < dmin)
       dmin = d;
   }
   lua_pushnumber(L, dmin);
+  return 1;
 }
 
 
-static void math_max (lua_State *L) {
-  int i = 1;
-  double dmax = luaL_check_number(L, i);
-  while (lua_getparam(L, ++i) != LUA_NOOBJECT) {
+static int math_max (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  double dmax = luaL_check_number(L, 1);
+  int i;
+  for (i=2; i<=n; i++) {
     double d = luaL_check_number(L, i);
     if (d > dmax)
       dmax = d;
   }
   lua_pushnumber(L, dmax);
+  return 1;
 }
 
 
-static void math_random (lua_State *L) {
+static int math_random (lua_State *L) {
   /* the '%' avoids the (rare) case of r==1, and is needed also because on
      some systems (SunOS!) "rand()" may return a value larger than RAND_MAX */
   double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
-  if (lua_getparam(L, 1) == LUA_NOOBJECT)  /* no arguments? */
-    lua_pushnumber(L, r);  /* Number between 0 and 1 */
-  else {
-    int l, u;  /* lower & upper limits */
-    if (lua_getparam(L, 2) == LUA_NOOBJECT) {  /* only one argument? */
-      l = 1;
-      u = luaL_check_int(L, 1);
+  switch (lua_gettop(L)) {  /* check number of arguments */
+    case 0: {  /* no arguments */
+      lua_pushnumber(L, r);  /* Number between 0 and 1 */
+      break;
     }
-    else {  /* two arguments */
-      l = luaL_check_int(L, 1);
-      u = luaL_check_int(L, 2);
+    case 1: {  /* only upper limit */
+      int u = luaL_check_int(L, 1);
+      luaL_arg_check(L, 1<=u, 1, "interval is empty");
+      lua_pushnumber(L, (int)(r*u)+1);  /* integer between 1 and `u' */
+      break;
     }
-    luaL_arg_check(L, l<=u, 1, "interval is empty");
-    lua_pushnumber(L, (int)(r*(u-l+1))+l);  /* integer between `l' and `u' */
+    case 2: {  /* lower and upper limits */
+      int l = luaL_check_int(L, 1);
+      int u = luaL_check_int(L, 2);
+      luaL_arg_check(L, l<=u, 2, "interval is empty");
+      lua_pushnumber(L, (int)(r*(u-l+1))+l);  /* integer between `l' and `u' */
+      break;
+    }
+    default: lua_error(L, "wrong number of arguments");
   }
+  return 1;
 }
 
 
-static void math_randomseed (lua_State *L) {
+static int math_randomseed (lua_State *L) {
   srand(luaL_check_int(L, 1));
+  return 0;
 }
 
 
@@ -198,11 +228,11 @@ static const struct luaL_reg mathlib[] = {
 /*
 ** Open math library
 */
-void lua_mathlibopen (lua_State *L) {
+LUALIB_API void lua_mathlibopen (lua_State *L) {
   luaL_openl(L, mathlib);
   lua_pushcfunction(L, math_pow);
-  lua_pushnumber(L, 0);  /* to get its tag */
-  lua_settagmethod(L, lua_tag(L, lua_pop(L)), "pow");
-  lua_pushnumber(L, PI); lua_setglobal(L, "PI");
+  lua_settagmethod(L, LUA_TNUMBER, "pow");
+  lua_pushnumber(L, PI);
+  lua_setglobal(L, "PI");
 }
 

lmem.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.c,v 1.28 2000/03/10 18:37:44 roberto Exp roberto $
+** $Id: lmem.c,v 1.38 2000/10/26 12:47:05 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -7,26 +7,17 @@
 
 #include <stdlib.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
+#include "ldo.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
-#include "lua.h"
-
-
-/*
-** Number ANSI systems do not need these tests;
-** but some systems (Sun OS) are not that ANSI...
-*/
-#ifdef OLD_ANSI
-#define realloc(b,s)	((b) == NULL ? malloc(s) : (realloc)(b, s))
-#define free(b)		if (b) (free)(b)
-#endif
 
 
 
-#ifdef DEBUG
+
+#ifdef LUA_DEBUG
 /*
 ** {======================================================================
 ** Controlled version for realloc.
@@ -35,16 +26,16 @@
 
 
 #include <assert.h>
+#include <limits.h>
 #include <string.h>
 
-
 #define realloc(b, s)	debug_realloc(b, s)
-#define malloc(b)	debug_realloc(NULL, 0)
+#define malloc(b)	debug_realloc(NULL, b)
 #define free(b)		debug_realloc(b, 0)
 
 
 /* ensures maximum alignment for HEADER */
-#define HEADER	(sizeof(double)>sizeof(long) ? sizeof(double) : sizeof(long))
+#define HEADER	(sizeof(union L_Umaxalign))
 
 #define MARKSIZE	16
 #define MARK		0x55  /* 01010101 (a nice pattern) */
@@ -55,6 +46,7 @@
 unsigned long memdebug_numblocks = 0;
 unsigned long memdebug_total = 0;
 unsigned long memdebug_maxmem = 0;
+unsigned long memdebug_memlimit = LONG_MAX;
 
 
 static void *checkblock (void *block) {
@@ -84,10 +76,13 @@ static void *debug_realloc (void *block, size_t size) {
     freeblock(block);
     return NULL;
   }
+  else if (memdebug_total+size > memdebug_memlimit)
+    return NULL;  /* to test memory allocation errors */
   else {
     size_t realsize = HEADER+size+MARKSIZE;
     char *newblock = (char *)(malloc)(realsize);  /* alloc a new block */
     int i;
+    if (realsize < size) return NULL;  /* overflow! */
     if (newblock == NULL) return NULL;
     if (block) {
       size_t oldsize = *blocksize(block);
@@ -111,10 +106,20 @@ static void *debug_realloc (void *block, size_t size) {
 
 
 
-void *luaM_growaux (lua_State *L, void *block, unsigned long nelems,
-               int inc, int size, const char *errormsg, unsigned long limit) {
-  unsigned long newn = nelems+inc;
-  if (newn >= limit) lua_error(L, errormsg);
+/*
+** Real ISO (ANSI) systems do not need these tests;
+** but some systems (Sun OS) are not that ISO...
+*/
+#ifdef OLD_ANSI
+#define realloc(b,s)	((b) == NULL ? malloc(s) : (realloc)(b, s))
+#define free(b)		if (b) (free)(b)
+#endif
+
+
+void *luaM_growaux (lua_State *L, void *block, size_t nelems,
+               int inc, size_t size, const char *errormsg, size_t limit) {
+  size_t newn = nelems+inc;
+  if (nelems >= limit-inc) lua_error(L, errormsg);
   if ((newn ^ nelems) <= nelems ||  /* still the same power-of-2 limit? */
        (nelems > 0 && newn < MINPOWER2))  /* or block already is MINPOWER2? */
       return block;  /* do not need to reallocate */
@@ -126,16 +131,19 @@ 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) {
+void *luaM_realloc (lua_State *L, void *block, lint32 size) {
   if (size == 0) {
     free(block);  /* block may be NULL; that is OK for free */
     return NULL;
   }
-  else if ((size_t)size != size)
+  else if (size >= MAX_SIZET)
     lua_error(L, "memory allocation error: block too big");
   block = realloc(block, size);
-  if (block == NULL)
-    lua_error(L, memEM);
+  if (block == NULL) {
+    if (L)
+      luaD_breakrun(L, LUA_ERRMEM);  /* break run without error message */
+    else return NULL;  /* error before creating state! */
+  }
   return block;
 }
 

lmem.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lmem.h,v 1.12 2000/01/13 16:30:47 roberto Exp roberto $
+** $Id: lmem.h,v 1.15 2000/08/07 18:39:16 roberto Exp roberto $
 ** Interface to Memory Manager
 ** See Copyright Notice in lua.h
 */
@@ -8,35 +8,33 @@
 #define lmem_h
 
 
-#include <stdlib.h>
+#include <stddef.h>
 
+#include "llimits.h"
 #include "lua.h"
 
-/* memory error messages */
-#define codeEM   "code size overflow"
-#define constantEM   "constant table overflow"
-#define refEM   "reference table overflow"
-#define tableEM  "table overflow"
-#define memEM "not enough memory"
-#define arrEM	"internal array larger than `int' limit"
+void *luaM_realloc (lua_State *L, void *oldblock, lint32 size);
+void *luaM_growaux (lua_State *L, void *block, size_t nelems,
+                    int inc, size_t size, const char *errormsg,
+                    size_t limit);
 
-void *luaM_realloc (lua_State *L, void *oldblock, unsigned long size);
-void *luaM_growaux (lua_State *L, void *block, unsigned long nelems, int inc, int size,
-                       const char *errormsg, unsigned long limit);
-
-#define luaM_free(L, b)	luaM_realloc(L, (b), 0)
+#define luaM_free(L, b)		luaM_realloc(L, (b), 0)
 #define luaM_malloc(L, t)	luaM_realloc(L, NULL, (t))
 #define luaM_new(L, t)          ((t *)luaM_malloc(L, sizeof(t)))
-#define luaM_newvector(L, n,t)  ((t *)luaM_malloc(L, (n)*sizeof(t)))
+#define luaM_newvector(L, n,t)  ((t *)luaM_malloc(L, (n)*(lint32)sizeof(t)))
+
 #define luaM_growvector(L, v,nelems,inc,t,e,l) \
           ((v)=(t *)luaM_growaux(L, v,nelems,inc,sizeof(t),e,l))
-#define luaM_reallocvector(L, v,n,t) ((v)=(t *)luaM_realloc(L, v,(n)*sizeof(t)))
+
+#define luaM_reallocvector(L, v,n,t) \
+	((v)=(t *)luaM_realloc(L, v,(n)*(lint32)sizeof(t)))
 
 
-#ifdef DEBUG
+#ifdef LUA_DEBUG
 extern unsigned long memdebug_numblocks;
 extern unsigned long memdebug_total;
 extern unsigned long memdebug_maxmem;
+extern unsigned long memdebug_memlimit;
 #endif
 
 

lobject.c

@@ -1,110 +1,125 @@
 /*
-** $Id: lobject.c,v 1.35 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: lobject.c,v 1.54 2000/10/10 19:53:20 roberto Exp roberto $
 ** Some generic functions over Lua objects
 ** See Copyright Notice in lua.h
 */
 
 #include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
-#define LUA_REENTRANT
-
-#include "lobject.h"
 #include "lua.h"
 
+#include "lmem.h"
+#include "lobject.h"
+#include "lstate.h"
 
-const char *const luaO_typenames[] = { /* ORDER LUA_T */
-    "userdata", "number", "string", "table", "function", "function", "nil",
-    "function", "function", "line"
+
+
+const TObject luaO_nilobject = {LUA_TNIL, {NULL}};
+
+
+const char *const luaO_typenames[] = {
+  "userdata", "nil", "number", "string", "table", "function"
 };
 
 
-const TObject luaO_nilobject = {TAG_NIL, {NULL}};
-
 
 /*
 ** returns smaller power of 2 larger than `n' (minimum is MINPOWER2) 
 */
-unsigned long luaO_power2 (unsigned long n) {
-  unsigned long p = MINPOWER2;
+lint32 luaO_power2 (lint32 n) {
+  lint32 p = MINPOWER2;
   while (p<=n) p<<=1;
   return p;
 }
 
 
-int luaO_equalval (const TObject *t1, const TObject *t2) {
+int luaO_equalObj (const TObject *t1, const TObject *t2) {
+  if (ttype(t1) != ttype(t2)) return 0;
   switch (ttype(t1)) {
-    case TAG_NUMBER:
+    case LUA_TNUMBER:
       return nvalue(t1) == nvalue(t2);
-    case TAG_STRING: case TAG_USERDATA:
-      return svalue(t1) == svalue(t2);
-    case TAG_TABLE: 
-      return avalue(t1) == avalue(t2);
-    case TAG_CCLOSURE: case TAG_LCLOSURE:
+    case LUA_TSTRING: case LUA_TUSERDATA:
+      return tsvalue(t1) == tsvalue(t2);
+    case LUA_TTABLE: 
+      return hvalue(t1) == hvalue(t2);
+    case LUA_TFUNCTION:
       return clvalue(t1) == clvalue(t2);
     default:
-      LUA_ASSERT(L, ttype(t1) == TAG_NIL, "invalid type");
-      return 1; /* TAG_NIL */
+      LUA_ASSERT(ttype(t1) == LUA_TNIL, "invalid type");
+      return 1; /* LUA_TNIL */
   }
 }
 
 
-static double expten (unsigned int e) {
-  double exp = 10.0;
-  double res = 1.0;
-  for (; e; e>>=1) {
-    if (e & 1) res *= exp;
-    exp *= exp;
+char *luaO_openspace (lua_State *L, size_t n) {
+  if (n > L->Mbuffsize) {
+    luaM_reallocvector(L, L->Mbuffer, n, char);
+    L->nblocks += (n - L->Mbuffsize)*sizeof(char);
+    L->Mbuffsize = n;
   }
-  return res;
+  return L->Mbuffer;
 }
 
 
 int luaO_str2d (const char *s, Number *result) {  /* LUA_NUMBER */
-  double a = 0.0;
-  int point = 0;  /* number of decimal digits */
-  int sig;
-  while (isspace((unsigned char)*s)) s++;
-  sig = 0;
-  switch (*s) {
-    case '-': sig = 1;  /* go through */
-    case '+': s++;
-  }
-  if (! (isdigit((unsigned char)*s) ||
-          (*s == '.' && isdigit((unsigned char)*(s+1)))))
-    return 0;  /* not (at least one digit before or after the point) */
-  while (isdigit((unsigned char)*s))
-    a = 10.0*a + (*(s++)-'0');
-  if (*s == '.') {
-    s++;
-    while (isdigit((unsigned char)*s)) {
-      a = 10.0*a + (*(s++)-'0');
-      point++;
-    }
-  }
-  if (sig) a = -a;
-  if (*s == 'e' || *s == 'E') {
-    int e = 0;
-    s++;
-    sig = 0;
-    switch (*s) {
-      case '-': sig = 1;  /* go through */
-      case '+': s++;
-    }
-    if (!isdigit((unsigned char)*s)) return 0;  /* no digit in the exponent? */
-    do {
-      e = 10*e + (*(s++)-'0');
-    } while (isdigit((unsigned char)*s));
-    if (sig) e = -e;
-    point -= e;
-  }
-  while (isspace((unsigned char)*s)) s++;
-  if (*s != '\0') return 0;  /* invalid trailing characters? */
-  if (point != 0) {
-    if (point > 0) a /= expten(point);
-    else           a *= expten(-point);
-  }
-  *result = a;
+  char *endptr;
+  Number res = lua_str2number(s, &endptr);
+  if (endptr == s) return 0;  /* no conversion */
+  while (isspace((unsigned char)*endptr)) endptr++;
+  if (*endptr != '\0') return 0;  /* invalid trailing characters? */
+  *result = res;
   return 1;
 }
 
+
+/* maximum length of a string format for `luaO_verror' */
+#define MAX_VERROR	280
+
+/* this function needs to handle only '%d' and '%.XXs' formats */
+void luaO_verror (lua_State *L, const char *fmt, ...) {
+  va_list argp;
+  char buff[MAX_VERROR];  /* to hold formatted message */
+  va_start(argp, fmt);
+  vsprintf(buff, fmt, argp);
+  va_end(argp);
+  lua_error(L, buff);
+}
+
+
+void luaO_chunkid (char *out, const char *source, int bufflen) {
+  if (*source == '=') {
+    strncpy(out, source+1, bufflen);  /* remove first char */
+    out[bufflen-1] = '\0';  /* ensures null termination */
+  }
+  else {
+    if (*source == '@') {
+      int l;
+      source++;  /* skip the `@' */
+      bufflen -= sizeof("file `...%s'");
+      l = strlen(source);
+      if (l>bufflen) {
+        source += (l-bufflen);  /* get last part of file name */
+        sprintf(out, "file `...%.99s'", source);
+      }
+      else
+        sprintf(out, "file `%.99s'", source);
+    }
+    else {
+      int len = strcspn(source, "\n");  /* stop at first newline */
+      bufflen -= sizeof("string \"%.*s...\"");
+      if (len > bufflen) len = bufflen;
+      if (source[len] != '\0') {  /* must truncate? */
+        strcpy(out, "string \"");
+        out += strlen(out);
+        strncpy(out, source, len);
+        strcpy(out+len, "...\"");
+      }
+      else
+        sprintf(out, "string \"%.99s\"", source);
+    }
+  }
+}

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 1.59 2000/03/31 16:28:45 roberto Exp roberto $
+** $Id: lobject.h,v 1.81 2000/10/30 16:29:59 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -12,18 +12,18 @@
 #include "lua.h"
 
 
-#ifdef DEBUG
+#ifdef LUA_DEBUG
 #undef NDEBUG
 #include <assert.h>
-#define LUA_INTERNALERROR(L,s)	assert(((void)s,0))
-#define LUA_ASSERT(L,c,s)	assert(((void)s,(c)))
+#define LUA_INTERNALERROR(s)	assert(((void)s,0))
+#define LUA_ASSERT(c,s)		assert(((void)s,(c)))
 #else
-#define LUA_INTERNALERROR(L,s)	/* empty */
-#define LUA_ASSERT(L,c,s)	/* empty */
+#define LUA_INTERNALERROR(s)	/* empty */
+#define LUA_ASSERT(c,s)		/* empty */
 #endif
 
 
-#ifdef DEBUG
+#ifdef LUA_DEBUG
 /* to avoid warnings, and make sure value is really unused */
 #define UNUSED(x)	(x=0, (void)(x))
 #else
@@ -31,86 +31,69 @@
 #endif
 
 
-/*
-** Lua TYPES
-** WARNING: if you change the order of this enumeration,
-** grep "ORDER LUA_T"
-*/
-typedef enum {
-  TAG_USERDATA  =  0, /* default tag for userdata */
-  TAG_NUMBER,	/* fixed tag for numbers */
-  TAG_STRING,	/* fixed tag for strings */
-  TAG_TABLE,	/* default tag for tables */
-  TAG_LCLOSURE,	/* fixed tag for Lua closures */
-  TAG_CCLOSURE,	/* fixed tag for C closures */
-  TAG_NIL,	/* last "pre-defined" tag */
+/* mark for closures active in the stack */
+#define LUA_TMARK	6
 
-  TAG_LMARK,	/* mark for Lua closures */
-  TAG_CMARK,	/* mark for C closures */
-
-  TAG_LINE
-} lua_Type;
 
 /* tags for values visible from Lua == first user-created tag */
-#define NUM_TAGS	7
+#define NUM_TAGS	6
 
 
-/*
-** check whether `t' is a mark
-*/
-#define is_T_MARK(t)	((t) == TAG_LMARK || (t) == TAG_CMARK)
+/* check whether `t' is a mark */
+#define is_T_MARK(t)	((t) == LUA_TMARK)
 
 
 typedef union {
-  struct TString *ts;	/* TAG_STRING, TAG_USERDATA */
-  struct Closure *cl;	/* TAG_[CL]CLOSURE, TAG_[CL]MARK */
-  struct Hash *a;	/* TAG_TABLE */
-  Number n;		/* TAG_NUMBER */
-  int i;		/* TAG_LINE */
+  struct TString *ts;	/* LUA_TSTRING, LUA_TUSERDATA */
+  struct Closure *cl;	/* LUA_TFUNCTION */
+  struct Hash *a;	/* LUA_TTABLE */
+  struct CallInfo *i;	/* LUA_TLMARK */
+  Number n;		/* LUA_TNUMBER */
 } Value;
 
 
 /* Macros to access values */
 #define ttype(o)        ((o)->ttype)
 #define nvalue(o)       ((o)->value.n)
-#define svalue(o)       ((o)->value.ts->str)
 #define tsvalue(o)      ((o)->value.ts)
 #define clvalue(o)      ((o)->value.cl)
-#define avalue(o)       ((o)->value.a)
+#define hvalue(o)       ((o)->value.a)
+#define infovalue(o)	((o)->value.i)
+#define svalue(o)       (tsvalue(o)->str)
 
 
-typedef struct TObject {
-  lua_Type ttype;
+typedef struct lua_TObject {
+  int ttype;
   Value value;
 } TObject;
 
 
-typedef struct GlobalVar {
-  TObject value;
-  struct GlobalVar *next;
-  struct TString *name;
-} GlobalVar;
-
-
 /*
 ** String headers for string table
 */
+
+/*
+** most `malloc' libraries allocate memory in blocks of 8 bytes. TSPACK
+** tries to make sizeof(TString) a multiple of this granularity, to reduce
+** waste of space.
+*/
+#define TSPACK	((int)sizeof(int))
+
 typedef struct TString {
   union {
     struct {  /* for strings */
-      GlobalVar *gv;  /* eventual global value with this name */
-      long len;
+      unsigned long hash;
+      int constindex;  /* hint to reuse constants */
     } s;
     struct {  /* for userdata */
       int tag;
       void *value;
     } d;
   } u;
+  size_t len;
   struct TString *nexthash;  /* chain for hash table */
-  unsigned long hash;
-  int constindex;  /* hint to reuse constants (= -1 if this is a userdata) */
-  unsigned char marked;
-  char str[1];   /* variable length string!! must be the last field! */
+  int marked;
+  char str[TSPACK];   /* variable length string!! must be the last field! */
 } TString;
 
 
@@ -118,27 +101,33 @@ typedef struct TString {
 ** Function Prototypes
 */
 typedef struct Proto {
-  struct Proto *next;
-  int marked;
-  struct TString **kstr;  /* strings used by the function */
-  int nkstr;  /* size of `kstr' */
   Number *knum;  /* Number numbers used by the function */
   int nknum;  /* size of `knum' */
+  struct TString **kstr;  /* strings used by the function */
+  int nkstr;  /* size of `kstr' */
   struct Proto **kproto;  /* functions defined inside the function */
   int nkproto;  /* size of `kproto' */
-  Instruction *code;  /* ends with opcode ENDCODE */
+  Instruction *code;
+  int ncode;  /* size of `code'; when 0 means an incomplete `Proto' */
+  short numparams;
+  short is_vararg;
+  short maxstacksize;
+  short marked;
+  struct Proto *next;
+  /* debug information */
+  int *lineinfo;  /* map from opcodes to source lines */
+  int nlineinfo;  /* size of `lineinfo' */
+  int nlocvars;
+  struct LocVar *locvars;  /* information about local variables */
   int lineDefined;
   TString  *source;
-  int numparams;
-  int is_vararg;
-  int maxstacksize;
-  struct LocVar *locvars;  /* ends with line = -1 */
 } Proto;
 
 
 typedef struct LocVar {
-  TString *varname;           /* NULL signals end of scope */
-  int line;
+  TString *varname;
+  int startpc;  /* first point where variable is active */
+  int endpc;    /* first point where variable is dead */
 } LocVar;
 
 
@@ -146,17 +135,21 @@ typedef struct LocVar {
 ** Closures
 */
 typedef struct Closure {
-  struct Closure *next;
-  int marked;
   union {
     lua_CFunction c;  /* C functions */
     struct Proto *l;  /* Lua functions */
   } f;
-  int nelems;
-  TObject consts[1];
+  struct Closure *next;
+  struct Closure *mark;  /* marked closures (point to itself when not marked) */
+  short isC;  /* 0 for Lua functions, 1 for C functions */
+  short nupvalues;
+  TObject upvalue[1];
 } Closure;
 
 
+#define iscfunction(o)	(ttype(o) == LUA_TFUNCTION && clvalue(o)->isC)
+
+
 typedef struct Node {
   TObject key;
   TObject val;
@@ -164,26 +157,48 @@ typedef struct Node {
 } Node;
 
 typedef struct Hash {
-  int htag;
   Node *node;
+  int htag;
   int size;
   Node *firstfree;  /* this position is free; all positions after it are full */
   struct Hash *next;
-  int marked;
+  struct Hash *mark;  /* marked tables (point to itself when not marked) */
 } Hash;
 
 
-extern const char *const luaO_typenames[];
+/* unmarked tables and closures are represented by pointing `mark' to
+** themselves
+*/
+#define ismarked(x)	((x)->mark != (x))
+
+
+/*
+** informations about a call (for debugging)
+*/
+typedef struct CallInfo {
+  struct Closure *func;  /* function being called */
+  const Instruction **pc;  /* current pc of called function */
+  int lastpc;  /* last pc traced */
+  int line;  /* current line */
+  int refi;  /* current index in `lineinfo' */
+} CallInfo;
+
+
 extern const TObject luaO_nilobject;
+extern const char *const luaO_typenames[];
 
-#define luaO_typename(o)        luaO_typenames[ttype(o)]
 
-unsigned long luaO_power2 (unsigned long n);
+#define luaO_typename(o)	(luaO_typenames[ttype(o)])
 
-#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);
+
+lint32 luaO_power2 (lint32 n);
+char *luaO_openspace (lua_State *L, size_t n);
+
+int luaO_equalObj (const TObject *t1, const TObject *t2);
 int luaO_str2d (const char *s, Number *result);
 
+void luaO_verror (lua_State *L, const char *fmt, ...);
+void luaO_chunkid (char *out, const char *source, int len);
+
 
 #endif

lopcodes.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lopcodes.h,v 1.58 2000/04/13 16:51:01 roberto Exp roberto $
+** $Id: lopcodes.h,v 1.67 2000/08/29 14:48:16 roberto Exp roberto $
 ** Opcodes for Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -30,7 +30,7 @@
   The size of each argument is defined in `llimits.h'. The usual is an
   instruction with 32 bits, U arguments with 26 bits (32-6), B arguments
   with 9 bits, and A arguments with 17 bits (32-6-9). For small
-  instalations, the instruction size can be 16, so U has 10 bits,
+  installations, the instruction size can be 16, so U has 10 bits,
   and A and B have 5 bits each.
 ===========================================================================*/
 
@@ -51,7 +51,7 @@
 #define GET_OPCODE(i)	((OpCode)((i)&MASK1(SIZE_OP,0)))
 #define SET_OPCODE(i,o)	((i) = (((i)&MASK0(SIZE_OP,0)) | (Instruction)(o)))
 
-#define CREATE_U(o,u)	 ((Instruction)(o) | (Instruction)(u)<<POS_U)
+#define CREATE_U(o,u)	 ((Instruction)(o) | ((Instruction)(u)<<POS_U))
 #define GETARG_U(i)	((int)((i)>>POS_U))
 #define SETARG_U(i,u)	((i) = (((i)&MASK0(SIZE_U,POS_U)) | \
                                ((Instruction)(u)<<POS_U)))
@@ -91,7 +91,7 @@ OP_TAILCALL,/*	A B	v_n-v_1 f(at a)	(return)	f(v1,...,v_n)	*/
 OP_PUSHNIL,/*	U	-		nil_1-nil_u			*/
 OP_POP,/*	U	a_u-a_1		-				*/
 
-OP_PUSHINT,/*	S	-		(Number)s				*/
+OP_PUSHINT,/*	S	-		(Number)s			*/
 OP_PUSHSTRING,/* K	-		KSTR[k]				*/
 OP_PUSHNUM,/*	N	-		KNUM[n]				*/
 OP_PUSHNEGNUM,/* N	-		-KNUM[n]			*/
@@ -112,8 +112,8 @@ OP_SETLOCAL,/*	L	x		-		LOC[l]=x	*/
 OP_SETGLOBAL,/*	K	x		-		VAR[KSTR[k]]=x	*/
 OP_SETTABLE,/*	A B	v a_a-a_1 i t	(pops b values)	t[i]=v		*/
 
-OP_SETLIST,/*	A B	v_b-v_0 t	t		t[i+a*FPF]=v_i	*/
-OP_SETMAP,/*	U	v_u k_u - v_0 k_0 t	t	t[k_i]=v_i	*/
+OP_SETLIST,/*	A B	v_b-v_1 t	t		t[i+a*FPF]=v_i	*/
+OP_SETMAP,/*	U	v_u k_u - v_1 k_1 t	t	t[k_i]=v_i	*/
 
 OP_ADD,/*	-	y x		x+y				*/
 OP_ADDI,/*	S	x		x+s				*/
@@ -143,15 +143,26 @@ OP_PUSHNILJMP,/* -	-		nil		PC++;		*/
 OP_FORPREP,/*	J							*/
 OP_FORLOOP,/*	J							*/
 
-OP_CLOSURE,/*	A B	v_b-v_1		closure(KPROTO[a], v_1-v_b)	*/
+OP_LFORPREP,/*	J							*/
+OP_LFORLOOP,/*	J							*/
 
-OP_SETLINE/*	U	-		-		LINE=u		*/
+OP_CLOSURE/*	A B	v_b-v_1		closure(KPROTO[a], v_1-v_b)	*/
 
 } OpCode;
 
+#define NUM_OPCODES	((int)OP_CLOSURE+1)
 
 
 #define ISJUMP(o)	(OP_JMPNE <= (o) && (o) <= OP_JMP)
 
 
+
+/* special code to fit a LUA_MULTRET inside an argB */
+#define MULT_RET        255	/* (<=MAXARG_B) */
+#if MULT_RET>MAXARG_B
+#undef MULT_RET
+#define MULT_RET	MAXARG_B
+#endif
+
+
 #endif

lparser.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lparser.h,v 1.15 2000/04/05 17:51:58 roberto Exp roberto $
+** $Id: lparser.h,v 1.25 2000/09/29 12:42:13 roberto Exp roberto $
 ** LL(1) Parser and code generator for Lua
 ** See Copyright Notice in lua.h
 */
@@ -43,15 +43,14 @@ typedef struct FuncState {
   struct lua_State *L;  /* copy of the Lua state */
   int pc;  /* next position to code */
   int lasttarget;   /* `pc' of last `jump target' */
-  int jlt;  /* list of jumps to `lasttarged' */
-  int stacklevel;  /* number of values on activation register */
-  int nlocalvar;  /* number of active local variables */
-  int nupvalues;  /* number of upvalues */
-  int nvars;  /* number of entries in f->locvars (-1 if no debug information) */
-  int lastsetline;  /* line where last SETLINE was issued */
+  int jlt;  /* list of jumps to `lasttarget' */
+  short stacklevel;  /* number of values on activation register */
+  short nactloc;  /* number of active local variables */
+  short nupvalues;  /* number of upvalues */
+  int lastline;  /* line where last `lineinfo' was generated */
   struct Breaklabel *bl;  /* chain of breakable blocks */
   expdesc upvalues[MAXUPVALUES];  /* upvalues */
-  TString *localvar[MAXLOCALS];  /* store local variable names */
+  int actloc[MAXLOCALS];  /* local-variable stack (indices to locvars) */
 } FuncState;
 
 

lref.c

@@ -1,115 +0,0 @@
-/*
-** $Id: lref.c,v 1.10 2000/03/27 20:10:21 roberto Exp roberto $
-** reference mechanism
-** See Copyright Notice in lua.h
-*/
-
-
-#define LUA_REENTRANT
-
-#include "lapi.h"
-#include "lmem.h"
-#include "lref.h"
-#include "lstate.h"
-#include "lua.h"
-
-
-int lua_ref (lua_State *L,  int lock) {
-  int ref;
-  luaA_checkCargs(L, 1);
-  if (ttype(L->top-1) == TAG_NIL)
-    ref = LUA_REFNIL;
-  else {
-    if (L->refFree != NONEXT) {  /* is there a free place? */
-      ref = L->refFree;
-      L->refFree = L->refArray[ref].st;
-    }
-    else {  /* no more free places */
-      luaM_growvector(L, L->refArray, L->refSize, 1, struct Ref, refEM, MAX_INT);
-      ref = L->refSize++;
-    }
-    L->refArray[ref].o = *(L->top-1);
-    L->refArray[ref].st = lock ? LOCK : HOLD;
-  }
-  L->top--;
-  return ref;
-}
-
-
-void lua_unref (lua_State *L, int ref) {
-  if (ref >= 0) {
-    if (ref >= L->refSize || L->refArray[ref].st >= 0)
-      lua_error(L, "Lua API error - "
-                   "invalid argument for function `lua_unref'");
-    L->refArray[ref].st = L->refFree;
-    L->refFree = ref;
-  }
-}
-
-
-lua_Object lua_getref (lua_State *L, int ref) {
-  if (ref == LUA_REFNIL)
-    return luaA_putluaObject(L, &luaO_nilobject);
-  else if (0 <= ref && ref < L->refSize &&
-          (L->refArray[ref].st == LOCK || L->refArray[ref].st == HOLD))
-    return luaA_putluaObject(L, &L->refArray[ref].o);
-  else
-    return LUA_NOOBJECT;
-}
-
-
-void lua_beginblock (lua_State *L) {
-  luaM_growvector(L, L->Cblocks, L->numCblocks, 1, struct C_Lua_Stack,
-                  "too many nested blocks", L->stacksize);
-  L->Cblocks[L->numCblocks] = L->Cstack;
-  L->numCblocks++;
-}
-
-
-void lua_endblock (lua_State *L) {
-  if (L->numCblocks <= 0)
-    lua_error(L, "Lua API error - no block to end");
-  --L->numCblocks;
-  L->Cstack = L->Cblocks[L->numCblocks];
-  L->top = L->Cstack.base;
-}
-
-
-
-
-
-
-static int ismarked (const TObject *o) {
-  /* valid only for locked objects */
-  switch (o->ttype) {
-    case TAG_STRING: case TAG_USERDATA:
-      return o->value.ts->marked;
-    case TAG_TABLE:
-      return o->value.a->marked;
-    case TAG_LCLOSURE:  case TAG_CCLOSURE:
-      return o->value.cl->marked;
-    default:  /* number */
-      return 1;
-  }
-}
-
-
-/* for internal debugging only; check if a link of free refs is valid */
-#define VALIDLINK(L, st,n)	(NONEXT <= (st) && (st) < (n))
-
-void luaR_invalidaterefs (lua_State *L) {
-  int n = L->refSize;
-  int i;
-  for (i=0; i<n; i++) {
-    struct Ref *r = &L->refArray[i];
-    if (r->st == HOLD && !ismarked(&r->o))
-      r->st = COLLECTED;
-    LUA_ASSERT(L, (r->st == LOCK && ismarked(&r->o)) ||
-                r->st == COLLECTED ||
-                r->st == NONEXT ||
-               (r->st < n && VALIDLINK(L, L->refArray[r->st].st, n)),
-               "inconsistent ref table");
-  }
-  LUA_ASSERT(L, VALIDLINK(L, L->refFree, n), "inconsistent ref table");
-}
-

lref.h

@@ -1,27 +0,0 @@
-/*
-** $Id: lref.h,v 1.5 1999/12/27 17:33:22 roberto Exp roberto $
-** reference mechanism
-** See Copyright Notice in lua.h
-*/
-
-#ifndef lref_h
-#define lref_h
-
-#include "lobject.h"
-
-
-#define NONEXT          -1      /* to end the free list */
-#define HOLD            -2
-#define COLLECTED       -3
-#define LOCK            -4
-
-
-struct Ref {
-  TObject o;
-  int st;  /* can be LOCK, HOLD, COLLECTED, or next (for free list) */
-};
-
-
-void luaR_invalidaterefs (lua_State *L);
-
-#endif

lstate.c

@@ -1,108 +1,121 @@
 /*
-** $Id: lstate.c,v 1.24 2000/01/13 16:30:47 roberto Exp roberto $
+** $Id: lstate.c,v 1.47 2000/10/26 12:47:05 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
 
 
-#include <stdarg.h>
+#include <stdio.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
-#include "lauxlib.h"
-#include "lbuiltin.h"
 #include "ldo.h"
 #include "lgc.h"
 #include "llex.h"
 #include "lmem.h"
-#include "lref.h"
 #include "lstate.h"
 #include "lstring.h"
+#include "ltable.h"
 #include "ltm.h"
 
 
-lua_State *lua_state = NULL;
+#ifdef LUA_DEBUG
+static lua_State *lua_state = NULL;
+void luaB_opentests (lua_State *L);
+#endif
 
 
-static lua_State *newstate_aux (int stacksize, int put_builtin) {
-  lua_State *L = luaM_new(NULL, lua_State);
-  L->errorJmp = NULL;
-  L->Mbuffer = NULL;
-  L->Mbuffbase = 0;
-  L->Mbuffsize = 0;
-  L->Mbuffnext = 0;
-  L->Cblocks = NULL;
-  L->numCblocks = 0;
-  L->rootproto = NULL;
-  L->rootcl = NULL;
-  L->rootglobal = NULL;
-  L->roottable = NULL;
-  L->IMtable = NULL;
-  L->refArray = NULL;
-  L->refSize = 0;
-  L->refFree = NONEXT;
-  L->nblocks = 0;
-  L->GCthreshold = MAX_INT;  /* to avoid GC during pre-definitions */
-  L->debug = 0;
-  L->callhook = NULL;
-  L->linehook = NULL;
-  L->allowhooks = 1;
+/*
+** built-in implementation for ERRORMESSAGE. In a "correct" environment
+** ERRORMESSAGE should have an external definition, and so this function
+** would not be used.
+*/
+static int errormessage (lua_State *L) {
+  const char *s = lua_tostring(L, 1);
+  if (s == NULL) s = "(no message)";
+  fprintf(stderr, "error: %s\n", s);
+  return 0;
+}
+
+
+/*
+** open parts that may cause memory-allocation errors
+*/
+static void f_luaopen (lua_State *L, void *ud) {
+  int stacksize = *(int *)ud;
+  if (stacksize == 0)
+    stacksize = DEFAULT_STACK_SIZE;
+  else
+    stacksize += LUA_MINSTACK;
+  L->gt = luaH_new(L, 10);  /* table of globals */
   luaD_init(L, stacksize);
   luaS_init(L);
   luaX_init(L);
   luaT_init(L);
-  if (put_builtin)
-    luaB_predefine(L);
-  L->GCthreshold = L->nblocks*4;
+  lua_newtable(L);
+  lua_ref(L, 1);  /* create registry */
+  lua_register(L, LUA_ERRORMESSAGE, errormessage);
+#ifdef LUA_DEBUG
+  luaB_opentests(L);
+  if (lua_state == NULL) lua_state = L;  /* keep first state to be opened */
+#endif
+  LUA_ASSERT(lua_gettop(L) == 0, "wrong API stack");
+}
+
+
+LUA_API lua_State *lua_open (int stacksize) {
+  lua_State *L = luaM_new(NULL, lua_State);
+  if (L == NULL) return NULL;  /* memory allocation error */
+  L->stack = NULL;
+  L->strt.size = L->udt.size = 0;
+  L->strt.nuse = L->udt.nuse = 0;
+  L->strt.hash = NULL;
+  L->udt.hash = NULL;
+  L->Mbuffer = NULL;
+  L->Mbuffsize = 0;
+  L->rootproto = NULL;
+  L->rootcl = NULL;
+  L->roottable = NULL;
+  L->TMtable = NULL;
+  L->last_tag = -1;
+  L->refArray = NULL;
+  L->refSize = 0;
+  L->refFree = NONEXT;
+  L->nblocks = sizeof(lua_State);
+  L->GCthreshold = MAX_INT;  /* to avoid GC during pre-definitions */
+  L->callhook = NULL;
+  L->linehook = NULL;
+  L->allowhooks = 1;
+  L->errorJmp = NULL;
+  if (luaD_runprotected(L, f_luaopen, &stacksize) != 0) {
+    /* memory allocation error: free partial state */
+    lua_close(L);
+    return NULL;
+  }
+  L->GCthreshold = 2*L->nblocks;
   return L;
 }
 
 
-lua_State *lua_newstate (const char *s, ...) {
-  static const char *const ops[] = {"stack", "builtin", NULL};
-  va_list ap;
-  int stacksize = DEFAULT_STACK_SIZE;
-  int put_builtin = 1;
-  va_start(ap, s);
-  while (s) {
-    switch (luaL_findstring(s, ops)) {
-      case 0:  /* stack */
-        stacksize = va_arg(ap, int);
-        break;
-      case 1:  /* builtin */
-        put_builtin = va_arg(ap, int);
-        break;
-      default:  /* invalid argument */
-        va_end(ap);
-        return NULL;
-    }
-    s = va_arg(ap, const char *);
-  }
-  va_end(ap);
-  return newstate_aux(stacksize, put_builtin);
-}
-
-
-void lua_close (lua_State *L) {
+LUA_API void lua_close (lua_State *L) {
+  LUA_ASSERT(L != lua_state || lua_gettop(L) == 0, "garbage in C stack");
   luaC_collect(L, 1);  /* collect all elements */
-  LUA_ASSERT(L, L->rootproto == NULL, "list should be empty");
-  LUA_ASSERT(L, L->rootcl == NULL, "list should be empty");
-  LUA_ASSERT(L, L->rootglobal == NULL, "list should be empty");
-  LUA_ASSERT(L, L->roottable == NULL, "list should be empty");
+  LUA_ASSERT(L->rootproto == NULL, "list should be empty");
+  LUA_ASSERT(L->rootcl == NULL, "list should be empty");
+  LUA_ASSERT(L->roottable == NULL, "list should be empty");
   luaS_freeall(L);
+  if (L->stack)
+    L->nblocks -= (L->stack_last - L->stack + 1)*sizeof(TObject);
   luaM_free(L, L->stack);
-  luaM_free(L, L->IMtable);
+  L->nblocks -= (L->last_tag+1)*sizeof(struct TM);
+  luaM_free(L, L->TMtable);
+  L->nblocks -= (L->refSize)*sizeof(struct Ref);
   luaM_free(L, L->refArray);
+  L->nblocks -= (L->Mbuffsize)*sizeof(char);
   luaM_free(L, L->Mbuffer);
-  luaM_free(L, L->Cblocks);
-  LUA_ASSERT(L, L->numCblocks == 0, "Cblocks still open");
-  LUA_ASSERT(L, L->nblocks == 0, "wrong count for nblocks");
-  LUA_ASSERT(L, L->Cstack.base == L->top, "C2Lua not empty");
+  LUA_ASSERT(L->nblocks == sizeof(lua_State), "wrong count for nblocks");
   luaM_free(L, L);
-  if (L == lua_state) {
-    LUA_ASSERT(L, memdebug_numblocks == 0, "memory leak!");
-    LUA_ASSERT(L, memdebug_total == 0,"memory leak!");
-    lua_state = NULL;
-  }
+  LUA_ASSERT(L != lua_state || memdebug_numblocks == 0, "memory leak!");
+  LUA_ASSERT(L != lua_state || memdebug_total == 0,"memory leak!");
 }
 

lstate.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstate.h,v 1.30 2000/03/10 18:37:44 roberto Exp roberto $
+** $Id: lstate.h,v 1.40 2000/09/29 12:42:13 roberto Exp roberto $
 ** Global State
 ** See Copyright Notice in lua.h
 */
@@ -7,8 +7,6 @@
 #ifndef lstate_h
 #define lstate_h
 
-#include <setjmp.h>
-
 #include "lobject.h"
 #include "lua.h"
 #include "luadebug.h"
@@ -19,30 +17,27 @@ typedef TObject *StkId;  /* index to stack elements */
 
 
 /*
-** `jmp_buf' may be an array, so it is better to make sure it has an
-** address (and not that it *is* an address...)
+** marks for Reference array
 */
-struct lua_longjmp {
-  jmp_buf b;
+#define NONEXT          -1      /* to end the free list */
+#define HOLD            -2
+#define COLLECTED       -3
+#define LOCK            -4
+
+
+struct Ref {
+  TObject o;
+  int st;  /* can be LOCK, HOLD, COLLECTED, or next (for free list) */
 };
 
 
-/*
-** stack layout for C point of view:
-** [lua2C, lua2C+num) - `array' lua2C
-** [lua2C+num, base)  - space for extra lua_Objects (limbo)
-** [base, L->top)     - `stack' C2Lua
-*/
-struct C_Lua_Stack {
-  StkId base;
-  StkId lua2C;
-  int num;
-};
+struct lua_longjmp;  /* defined in ldo.c */
+struct TM;  /* defined in ltm.h */
 
 
 typedef struct stringtable {
   int size;
-  int nuse;  /* number of elements (including EMPTYs) */
+  lint32 nuse;  /* number of elements */
   TString **hash;
 } stringtable;
 
@@ -54,36 +49,29 @@ struct lua_State {
   StkId stack;  /* stack base */
   StkId stack_last;  /* last free slot in the stack */
   int stacksize;
-  struct C_Lua_Stack Cstack;  /* C2lua struct */
+  StkId Cbase;  /* base for current C function */
   struct lua_longjmp *errorJmp;  /* current error recover point */
   char *Mbuffer;  /* global buffer */
-  int Mbuffbase;  /* current first position of Mbuffer */
-  int Mbuffsize;  /* size of Mbuffer */
-  int Mbuffnext;  /* next position to fill in Mbuffer */
-  struct C_Lua_Stack *Cblocks;
-  int numCblocks;  /* number of nested Cblocks */
+  size_t Mbuffsize;  /* size of Mbuffer */
   /* global state */
   Proto *rootproto;  /* list of all prototypes */
   Closure *rootcl;  /* list of all closures */
   Hash *roottable;  /* list of all tables */
-  GlobalVar *rootglobal;  /* list of global variables */
-  stringtable *string_root;  /* array of hash tables for strings and udata */
-  struct IM *IMtable;  /* table for tag methods */
-  int last_tag;  /* last used tag in IMtable */
+  stringtable strt;  /* hash table for strings */
+  stringtable udt;   /* hash table for udata */
+  Hash *gt;  /* table for globals */
+  struct TM *TMtable;  /* table for tag methods */
+  int last_tag;  /* last used tag in TMtable */
   struct Ref *refArray;  /* locked objects */
   int refSize;  /* size of refArray */
   int refFree;  /* list of free positions in refArray */
   unsigned long GCthreshold;
-  unsigned long nblocks;  /* number of `blocks' currently allocated */
-  int debug;
+  unsigned long nblocks;  /* number of `bytes' currently allocated */
   lua_Hook callhook;
   lua_Hook linehook;
   int allowhooks;
 };
 
 
-
-
-
 #endif
 

lstring.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.c,v 1.33 2000/03/10 14:38:10 roberto Exp roberto $
+** $Id: lstring.c,v 1.44 2000/10/26 12:47:05 roberto Exp roberto $
 ** String table (keeps all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -7,47 +7,47 @@
 
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "lstring.h"
-#include "lua.h"
 
 
-
-#define gcsizestring(L, l)	numblocks(L, 0, sizeof(TString)+l)
-#define gcsizeudata		gcsizestring(L, 0)
+/*
+** type equivalent to TString, but with maximum alignment requirements
+*/
+union L_UTString {
+  TString ts;
+  union L_Umaxalign dummy;  /* ensures maximum alignment for `local' udata */
+};
 
 
 
 void luaS_init (lua_State *L) {
-  int i;
-  L->string_root = luaM_newvector(L, NUM_HASHS, stringtable);
-  for (i=0; i<NUM_HASHS; i++) {
-    L->string_root[i].size = 1;
-    L->string_root[i].nuse = 0;
-    L->string_root[i].hash = luaM_newvector(L, 1, TString *);;
-    L->string_root[i].hash[0] = NULL;
-  }
+  L->strt.hash = luaM_newvector(L, 1, TString *);
+  L->udt.hash = luaM_newvector(L, 1, TString *);
+  L->nblocks += 2*sizeof(TString *);
+  L->strt.size = L->udt.size = 1;
+  L->strt.nuse = L->udt.nuse = 0;
+  L->strt.hash[0] = L->udt.hash[0] = NULL;
 }
 
 
 void luaS_freeall (lua_State *L) {
-  int i;
-  for (i=0; i<NUM_HASHS; i++) {
-    LUA_ASSERT(L, L->string_root[i].nuse==0, "non-empty string table");
-    luaM_free(L, L->string_root[i].hash);
-  }
-  luaM_free(L, L->string_root);
+  LUA_ASSERT(L->strt.nuse==0, "non-empty string table");
+  L->nblocks -= (L->strt.size + L->udt.size)*sizeof(TString *);
+  luaM_free(L, L->strt.hash);
+  LUA_ASSERT(L->udt.nuse==0, "non-empty udata table");
+  luaM_free(L, L->udt.hash);
 }
 
 
-static unsigned long hash_s (const char *s, long l) {
+static unsigned long hash_s (const char *s, size_t l) {
   unsigned long h = l;  /* seed */
-  long step = (l>>6)+1;  /* if string is too long, don't hash all its chars */
-  for (; l>0; l-=step)
+  size_t step = (l>>5)|1;  /* if string is too long, don't hash all its chars */
+  for (; l>=step; l-=step)
     h = h ^ ((h<<5)+(h>>2)+(unsigned char)*(s++));
   return h;
 }
@@ -62,96 +62,82 @@ void luaS_resize (lua_State *L, stringtable *tb, int newsize) {
     TString *p = tb->hash[i];
     while (p) {  /* for each node in the list */
       TString *next = p->nexthash;  /* save next */
-      int h = p->hash&(newsize-1);  /* new position */
-      LUA_ASSERT(L, p->hash%newsize == (p->hash&(newsize-1)),
+      unsigned long h = (tb == &L->strt) ? p->u.s.hash : IntPoint(p->u.d.value);
+      int h1 = h&(newsize-1);  /* new position */
+      LUA_ASSERT(h%newsize == (h&(newsize-1)),
                     "a&(x-1) == a%x, for x power of 2");
-      p->nexthash = newhash[h];  /* chain it in new position */
-      newhash[h] = p;
+      p->nexthash = newhash[h1];  /* chain it in new position */
+      newhash[h1] = p;
       p = next;
     }
   }
   luaM_free(L, tb->hash);
+  L->nblocks += (newsize - tb->size)*sizeof(TString *);
   tb->size = newsize;
   tb->hash = newhash;
 }
 
 
-static TString *newone (lua_State *L, long l, unsigned long h) {
-  TString *ts = (TString *)luaM_malloc(L, 
-                                       sizeof(TString)+l*sizeof(char));
-  ts->marked = 0;
-  ts->nexthash = NULL;
-  ts->hash = h;
-  return ts;
-}
-
-
-static TString *newone_s (lua_State *L, const char *str,
-                               long l, unsigned long h) {
-  TString *ts = newone(L, l, h);
-  memcpy(ts->str, str, l);
-  ts->str[l] = 0;  /* ending 0 */
-  ts->u.s.gv = NULL;  /* no global value */
-  ts->u.s.len = l;
-  ts->constindex = 0;
-  L->nblocks += gcsizestring(L, l);
-  return ts;
-}
-
-
-static TString *newone_u (lua_State *L, void *buff,
-                               int tag, unsigned long h) {
-  TString *ts = newone(L, 0, h);
-  ts->u.d.value = buff;
-  ts->u.d.tag = (tag == LUA_ANYTAG) ? 0 : tag;
-  ts->constindex = -1;  /* tag -> this is a userdata */
-  L->nblocks += gcsizeudata;
-  return ts;
-}
-
-
 static void newentry (lua_State *L, stringtable *tb, TString *ts, int h) {
   ts->nexthash = tb->hash[h];  /* chain new entry */
   tb->hash[h] = ts;
   tb->nuse++;
-  if (tb->nuse > tb->size)  /* too crowded? */
+  if (tb->nuse > (lint32)tb->size && tb->size < MAX_INT/2)  /* too crowded? */
     luaS_resize(L, tb, tb->size*2);
 }
 
 
-TString *luaS_newlstr (lua_State *L, const char *str, long l) {
+
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
   unsigned long h = hash_s(str, l);
-  stringtable *tb = &L->string_root[(l==0) ? 0 :
-                         ((unsigned int)(str[0]+str[l-1]))&(NUM_HASHSTR-1)];
-  int h1 = h&(tb->size-1);
+  int h1 = h & (L->strt.size-1);
   TString *ts;
-  for (ts = tb->hash[h1]; ts; ts = ts->nexthash) {
-    if (ts->u.s.len == l && (memcmp(str, ts->str, l) == 0))
+  for (ts = L->strt.hash[h1]; ts; ts = ts->nexthash) {
+    if (ts->len == l && (memcmp(str, ts->str, l) == 0))
       return ts;
   }
   /* not found */
-  ts = newone_s(L, str, l, h);  /* create new entry */
-  newentry(L, tb, ts, h1);  /* insert it on table */
+  ts = (TString *)luaM_malloc(L, sizestring(l));
+  ts->marked = 0;
+  ts->nexthash = NULL;
+  ts->len = l;
+  ts->u.s.hash = h;
+  ts->u.s.constindex = 0;
+  memcpy(ts->str, str, l);
+  ts->str[l] = 0;  /* ending 0 */
+  L->nblocks += sizestring(l);
+  newentry(L, &L->strt, ts, h1);  /* insert it on table */
+  return ts;
+}
+
+
+TString *luaS_newudata (lua_State *L, size_t s, void *udata) {
+  union L_UTString *uts = (union L_UTString *)luaM_malloc(L,
+                                (lint32)sizeof(union L_UTString)+s);
+  TString *ts = &uts->ts;
+  ts->marked = 0;
+  ts->nexthash = NULL;
+  ts->len = s;
+  ts->u.d.tag = 0;
+  ts->u.d.value = (udata == NULL) ? uts+1 : udata;
+  L->nblocks += sizestring(s);
+ /* insert it on table */
+  newentry(L, &L->udt, ts, IntPoint(ts->u.d.value) & (L->udt.size-1));
   return ts;
 }
 
 
-/*
-** uses '%' for one hashing with userdata because addresses are too regular,
-** so two '&' operations would be highly correlated
-*/
 TString *luaS_createudata (lua_State *L, void *udata, int tag) {
-  unsigned long h = IntPoint(L, udata);
-  stringtable *tb = &L->string_root[(h%NUM_HASHUDATA)+NUM_HASHSTR];
-  int h1 = h&(tb->size-1);
+  int h1 = IntPoint(udata) & (L->udt.size-1);
   TString *ts;
-  for (ts = tb->hash[h1]; ts; ts = ts->nexthash) {
+  for (ts = L->udt.hash[h1]; ts; ts = ts->nexthash) {
     if (udata == ts->u.d.value && (tag == ts->u.d.tag || tag == LUA_ANYTAG))
       return ts;
   }
   /* not found */
-  ts = newone_u(L, udata, tag, h);
-  newentry(L, tb, ts, h1);
+  ts = luaS_newudata(L, 0, udata);
+  if (tag != LUA_ANYTAG)
+    ts->u.d.tag = tag;
   return ts;
 }
 
@@ -160,46 +146,10 @@ TString *luaS_new (lua_State *L, const char *str) {
   return luaS_newlstr(L, str, strlen(str));
 }
 
+
 TString *luaS_newfixed (lua_State *L, const char *str) {
   TString *ts = luaS_new(L, str);
   if (ts->marked == 0) ts->marked = FIXMARK;  /* avoid GC */
   return ts;
 }
 
-
-void luaS_free (lua_State *L, TString *t) {
-  if (t->constindex == -1)  /* is userdata? */
-    L->nblocks -= gcsizeudata;
-  else {  /* is string */
-    L->nblocks -= gcsizestring(L, t->u.s.len);
-    luaM_free(L, t->u.s.gv);
-  }
-  luaM_free(L, t);
-}
-
-
-GlobalVar *luaS_assertglobal (lua_State *L, TString *ts) {
-  GlobalVar *gv = ts->u.s.gv;
-  if (!gv) {  /* no global value yet? */
-    gv = luaM_new(L, GlobalVar);
-    gv->value.ttype = TAG_NIL;  /* initial value */
-    gv->name = ts;
-    gv->next = L->rootglobal;  /* chain in global list */
-    L->rootglobal = gv; 
-    ts->u.s.gv = gv;
-  }
-  return gv;
-}
-
-
-GlobalVar *luaS_assertglobalbyname (lua_State *L, const char *name) {
-  return luaS_assertglobal(L, luaS_new(L, name));
-}
-
-
-int luaS_globaldefined (lua_State *L, const char *name) {
-  TString *ts = luaS_new(L, name);
-  return ts->u.s.gv && ts->u.s.gv->value.ttype != TAG_NIL;
-}
-
-

lstring.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lstring.h,v 1.17 2000/03/10 14:38:10 roberto Exp roberto $
+** $Id: lstring.h,v 1.23 2000/10/26 12:47:05 roberto Exp roberto $
 ** String table (keep all strings handled by Lua)
 ** See Copyright Notice in lua.h
 */
@@ -12,30 +12,26 @@
 #include "lstate.h"
 
 
-#define NUM_HASHSTR     32
-#define NUM_HASHUDATA   31
-#define NUM_HASHS (NUM_HASHSTR+NUM_HASHUDATA)
-
-
 /*
-** any taggedstring with mark>=FIXMARK is never collected.
+** any TString with mark>=FIXMARK is never collected.
 ** Marks>=RESERVEDMARK are used to identify reserved words.
 */
 #define FIXMARK		2
 #define RESERVEDMARK	3
 
 
+#define sizestring(l)	((long)sizeof(TString) + \
+                         ((long)(l+1)-TSPACK)*(long)sizeof(char))
+
+
 void luaS_init (lua_State *L);
 void luaS_resize (lua_State *L, stringtable *tb, int newsize);
+TString *luaS_newudata (lua_State *L, size_t s, void *udata);
 TString *luaS_createudata (lua_State *L, void *udata, int tag);
 void luaS_freeall (lua_State *L);
-void luaS_free (lua_State *L, TString *ts);
-TString *luaS_newlstr (lua_State *L, const char *str, long l);
+TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
 TString *luaS_new (lua_State *L, const char *str);
 TString *luaS_newfixed (lua_State *L, const char *str);
-GlobalVar *luaS_assertglobal (lua_State *L, TString *ts);
-GlobalVar *luaS_assertglobalbyname (lua_State *L, const char *name);
-int luaS_globaldefined (lua_State *L, const char *name);
 
 
 #endif

lstrlib.c

@@ -1,111 +1,111 @@
 /*
-** $Id: lstrlib.c,v 1.40 2000/02/08 16:34:31 roberto Exp roberto $
+** $Id: lstrlib.c,v 1.55 2000/10/20 16:39:03 roberto Exp roberto $
 ** Standard library for string operations and pattern-matching
 ** See Copyright Notice in lua.h
 */
 
 
 #include <ctype.h>
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
 #include "lauxlib.h"
-#include "lua.h"
 #include "lualib.h"
 
 
 
-static void addnchar (lua_State *L, const char *s, int n) {
-  char *b = luaL_openspace(L, n);
-  memcpy(b, s, n);
-  luaL_addsize(L, n);
-}
-
-
-static void str_len (lua_State *L) {
-  long l;
+static int str_len (lua_State *L) {
+  size_t l;
   luaL_check_lstr(L, 1, &l);
   lua_pushnumber(L, l);
+  return 1;
 }
 
 
-static void closeandpush (lua_State *L) {
-  lua_pushlstring(L, luaL_buffer(L), luaL_getsize(L));
-}
-
-
-static long posrelat (long pos, long len) {
+static long posrelat (long pos, size_t len) {
   /* relative string position: negative means back from end */
-  return (pos>=0) ? pos : len+pos+1;
+  return (pos>=0) ? pos : (long)len+pos+1;
 }
 
 
-static void str_sub (lua_State *L) {
-  long l;
+static int str_sub (lua_State *L) {
+  size_t l;
   const char *s = luaL_check_lstr(L, 1, &l);
   long start = posrelat(luaL_check_long(L, 2), l);
   long end = posrelat(luaL_opt_long(L, 3, -1), l);
   if (start < 1) start = 1;
-  if (end > l) end = l;
+  if (end > (long)l) end = l;
   if (start <= end)
     lua_pushlstring(L, s+start-1, end-start+1);
   else lua_pushstring(L, "");
+  return 1;
 }
 
 
-static void str_lower (lua_State *L) {
-  long l;
-  int i;
+static int str_lower (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
   const char *s = luaL_check_lstr(L, 1, &l);
-  luaL_resetbuffer(L);
+  luaL_buffinit(L, &b);
   for (i=0; i<l; i++)
-    luaL_addchar(L, tolower((unsigned char)(s[i])));
-  closeandpush(L);
+    luaL_putchar(&b, tolower((unsigned char)(s[i])));
+  luaL_pushresult(&b);
+  return 1;
 }
 
 
-static void str_upper (lua_State *L) {
-  long l;
-  int i;
+static int str_upper (lua_State *L) {
+  size_t l;
+  size_t i;
+  luaL_Buffer b;
   const char *s = luaL_check_lstr(L, 1, &l);
-  luaL_resetbuffer(L);
+  luaL_buffinit(L, &b);
   for (i=0; i<l; i++)
-    luaL_addchar(L, toupper((unsigned char)(s[i])));
-  closeandpush(L);
+    luaL_putchar(&b, toupper((unsigned char)(s[i])));
+  luaL_pushresult(&b);
+  return 1;
 }
 
-static void str_rep (lua_State *L) {
-  long l;
+static int str_rep (lua_State *L) {
+  size_t l;
+  luaL_Buffer b;
   const char *s = luaL_check_lstr(L, 1, &l);
   int n = luaL_check_int(L, 2);
-  luaL_resetbuffer(L);
+  luaL_buffinit(L, &b);
   while (n-- > 0)
-    addnchar(L, s, l);
-  closeandpush(L);
+    luaL_addlstring(&b, s, l);
+  luaL_pushresult(&b);
+  return 1;
 }
 
 
-static void str_byte (lua_State *L) {
-  long l;
+static int str_byte (lua_State *L) {
+  size_t l;
   const char *s = luaL_check_lstr(L, 1, &l);
   long pos = posrelat(luaL_opt_long(L, 2, 1), l);
-  luaL_arg_check(L, 0<pos && pos<=l, 2,  "out of range");
+  luaL_arg_check(L, 0<pos && (size_t)pos<=l, 2,  "out of range");
   lua_pushnumber(L, (unsigned char)s[pos-1]);
+  return 1;
 }
 
 
-static void str_char (lua_State *L) {
-  int i = 0;
-  luaL_resetbuffer(L);
-  while (lua_getparam(L, ++i) != LUA_NOOBJECT) {
+static int str_char (lua_State *L) {
+  int n = lua_gettop(L);  /* number of arguments */
+  int i;
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
+  for (i=1; i<=n; i++) {
     int c = luaL_check_int(L, i);
     luaL_arg_check(L, (unsigned char)c == c, i, "invalid value");
-    luaL_addchar(L, (unsigned char)c);
+    luaL_putchar(&b, (unsigned char)c);
   }
-  closeandpush(L);
+  luaL_pushresult(&b);
+  return 1;
 }
 
 
@@ -126,7 +126,7 @@ struct Capture {
   int level;  /* total number of captures (finished or unfinished) */
   struct {
     const char *init;
-    int len;  /* -1 signals unfinished capture */
+    long len;  /* -1 signals unfinished capture */
   } capture[MAX_CAPTURES];
 };
 
@@ -135,16 +135,6 @@ struct Capture {
 #define SPECIALS	"^$*+?.([%-"
 
 
-static void push_captures (lua_State *L, struct Capture *cap) {
-  int i;
-  for (i=0; i<cap->level; i++) {
-    int l = cap->capture[i].len;
-    if (l == -1) lua_error(L, "unfinished capture");
-    lua_pushlstring(L, cap->capture[i].init, l);
-  }
-}
-
-
 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))
@@ -238,7 +228,8 @@ int luaI_singlematch (int c, const char *p, const char *ep) {
 }
 
 
-static const char *match (lua_State *L, const char *s, const char *p, struct Capture *cap);
+static const char *match (lua_State *L, const char *s, const char *p,
+                          struct Capture *cap);
 
 
 static const char *matchbalance (lua_State *L, const char *s, const char *p,
@@ -261,12 +252,12 @@ static const char *matchbalance (lua_State *L, const char *s, const char *p,
 }
 
 
-static const char *max_expand (lua_State *L, const char *s, const char *p, const char *ep,
-                         struct Capture *cap) {
-  int i = 0;  /* counts maximum expand for item */
+static const char *max_expand (lua_State *L, const char *s, const char *p,
+                               const char *ep, struct Capture *cap) {
+  long i = 0;  /* counts maximum expand for item */
   while ((s+i)<cap->src_end && luaI_singlematch((unsigned char)*(s+i), p, ep))
     i++;
-  /* keeps trying to match mith the maximum repetitions */
+  /* keeps trying to match with the maximum repetitions */
   while (i>=0) {
     const char *res = match(L, (s+i), ep+1, cap);
     if (res) return res;
@@ -276,8 +267,8 @@ static const char *max_expand (lua_State *L, const char *s, const char *p, const
 }
 
 
-static const char *min_expand (lua_State *L, const char *s, const char *p, const char *ep,
-                         struct Capture *cap) {
+static const char *min_expand (lua_State *L, const char *s, const char *p,
+                               const char *ep, struct Capture *cap) {
   for (;;) {
     const char *res = match(L, s, ep+1, cap);
     if (res != NULL)
@@ -317,15 +308,16 @@ static const char *end_capture (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_capture(L, level, cap);
-  int len = cap->capture[l].len;
-  if (cap->src_end-s >= len &&
+  size_t len = cap->capture[l].len;
+  if ((size_t)(cap->src_end-s) >= len &&
       memcmp(cap->capture[l].init, s, len) == 0)
     return s+len;
   else return NULL;
 }
 
 
-static const char *match (lua_State *L, const char *s, const char *p, struct Capture *cap) {
+static const char *match (lua_State *L, const char *s, const char *p,
+                          struct Capture *cap) {
   init: /* using goto's to optimize tail recursion */
   switch (*p) {
     case '(':  /* start capture */
@@ -376,8 +368,10 @@ static const char *match (lua_State *L, const char *s, const char *p, struct Cap
 
 
 
-static const char *memfind (const char *s1, long l1, const char *s2, long l2) {
-  if (l2 == 0) return s1;  /* empty strings are everywhere ;-) */
+static const char *lmemfind (const char *s1, size_t l1,
+                             const char *s2, size_t l2) {
+  if (l2 == 0) return s1;  /* empty strings are everywhere */
+  else if (l2 > l1) return NULL;  /* avoids a negative `l1' */
   else {
     const char *init;  /* to search for a `*s2' inside `s1' */
     l2--;  /* 1st char will be checked by `memchr' */
@@ -396,20 +390,32 @@ static const char *memfind (const char *s1, long l1, const char *s2, long l2) {
 }
 
 
-static void str_find (lua_State *L) {
-  long l1, l2;
+static int push_captures (lua_State *L, struct Capture *cap) {
+  int i;
+  luaL_checkstack(L, cap->level, "too many captures");
+  for (i=0; i<cap->level; i++) {
+    int l = cap->capture[i].len;
+    if (l == -1) lua_error(L, "unfinished capture");
+    lua_pushlstring(L, cap->capture[i].init, l);
+  }
+  return cap->level;  /* number of strings pushed */
+}
+
+
+static int str_find (lua_State *L) {
+  size_t l1, l2;
   const char *s = luaL_check_lstr(L, 1, &l1);
   const char *p = luaL_check_lstr(L, 2, &l2);
   long init = posrelat(luaL_opt_long(L, 3, 1), l1) - 1;
   struct Capture cap;
-  luaL_arg_check(L, 0 <= init && init <= l1, 3, "out of range");
-  if (lua_getparam(L, 4) != LUA_NOOBJECT ||
-      strpbrk(p, SPECIALS) == NULL) {  /* no special characters? */
-    const char *s2 = memfind(s+init, l1, p, l2);
+  luaL_arg_check(L, 0 <= init && (size_t)init <= l1, 3, "out of range");
+  if (lua_gettop(L) > 3 ||  /* extra argument? */
+      strpbrk(p, SPECIALS) == NULL) {  /* or no special characters? */
+    const char *s2 = lmemfind(s+init, l1-init, p, l2);
     if (s2) {
       lua_pushnumber(L, s2-s+1);
       lua_pushnumber(L, s2-s+l2);
-      return;
+      return 2;
     }
   }
   else {
@@ -422,69 +428,60 @@ static void str_find (lua_State *L) {
       if ((res=match(L, s1, p, &cap)) != NULL) {
         lua_pushnumber(L, s1-s+1);  /* start */
         lua_pushnumber(L, res-s);   /* end */
-        push_captures(L, &cap);
-        return;
+        return push_captures(L, &cap) + 2;
       }
     } while (s1++<cap.src_end && !anchor);
   }
   lua_pushnil(L);  /* not found */
+  return 1;
 }
 
 
-static void add_s (lua_State *L, lua_Object newp, struct Capture *cap) {
-  if (lua_isstring(L, newp)) {
-    const char *news = lua_getstring(L, newp);
-    int l = lua_strlen(L, newp);
-    int i;
+static void add_s (lua_State *L, luaL_Buffer *b, struct Capture *cap) {
+  if (lua_isstring(L, 3)) {
+    const char *news = lua_tostring(L, 3);
+    size_t l = lua_strlen(L, 3);
+    size_t i;
     for (i=0; i<l; i++) {
       if (news[i] != ESC)
-        luaL_addchar(L, news[i]);
+        luaL_putchar(b, news[i]);
       else {
         i++;  /* skip ESC */
         if (!isdigit((unsigned char)news[i]))
-          luaL_addchar(L, news[i]);
+          luaL_putchar(b, news[i]);
         else {
           int level = check_capture(L, news[i], cap);
-          addnchar(L, cap->capture[level].init, cap->capture[level].len);
+          luaL_addlstring(b, cap->capture[level].init, cap->capture[level].len);
         }
       }
     }
   }
   else {  /* is a function */
-    lua_Object res;
-    int status;
-    int oldbuff;
-    lua_beginblock(L);
-    push_captures(L, cap);
-    /* function may use buffer, so save it and create a new one */
-    oldbuff = luaL_newbuffer(L, 0);
-    status = lua_callfunction(L, newp);
-    /* restore old buffer */
-    luaL_oldbuffer(L, oldbuff);
-    if (status != 0) {
-      lua_endblock(L);
-      lua_error(L, NULL);
-    }
-    res = lua_getresult(L, 1);
-    if (lua_isstring(L, res))
-      addnchar(L, lua_getstring(L, res), lua_strlen(L, res));
-    lua_endblock(L);
+    int n;
+    lua_pushvalue(L, 3);
+    n = push_captures(L, cap);
+    lua_rawcall(L, n, 1);
+    if (lua_isstring(L, -1))
+      luaL_addvalue(b);  /* add return to accumulated result */
+    else
+      lua_pop(L, 1);  /* function result is not a string: pop it */
   }
 }
 
 
-static void str_gsub (lua_State *L) {
-  long srcl;
+static int str_gsub (lua_State *L) {
+  size_t srcl;
   const char *src = luaL_check_lstr(L, 1, &srcl);
   const char *p = luaL_check_string(L, 2);
-  lua_Object newp = lua_getparam(L, 3);
   int max_s = luaL_opt_int(L, 4, srcl+1);
   int anchor = (*p == '^') ? (p++, 1) : 0;
   int n = 0;
   struct Capture cap;
-  luaL_arg_check(L, lua_isstring(L, newp) || lua_isfunction(L, newp), 3,
-                 "string or function expected");
-  luaL_resetbuffer(L);
+  luaL_Buffer b;
+  luaL_arg_check(L,
+    lua_gettop(L) >= 3 && (lua_isstring(L, 3) || lua_isfunction(L, 3)),
+    3, "string or function expected");
+  luaL_buffinit(L, &b);
   cap.src_end = src+srcl;
   while (n < max_s) {
     const char *e;
@@ -492,57 +489,61 @@ static void str_gsub (lua_State *L) {
     e = match(L, src, p, &cap);
     if (e) {
       n++;
-      add_s(L, newp, &cap);
+      add_s(L, &b, &cap);
     }
     if (e && e>src) /* non empty match? */
       src = e;  /* skip it */
     else if (src < cap.src_end)
-      luaL_addchar(L, *src++);
+      luaL_putchar(&b, *src++);
     else break;
     if (anchor) break;
   }
-  addnchar(L, src, cap.src_end-src);
-  closeandpush(L);
+  luaL_addlstring(&b, src, cap.src_end-src);
+  luaL_pushresult(&b);
   lua_pushnumber(L, n);  /* number of substitutions */
+  return 2;
 }
 
 /* }====================================================== */
 
 
-static void luaI_addquoted (lua_State *L, int arg) {
-  long l;
+static void luaI_addquoted (lua_State *L, luaL_Buffer *b, int arg) {
+  size_t l;
   const char *s = luaL_check_lstr(L, arg, &l);
-  luaL_addchar(L, '"');
+  luaL_putchar(b, '"');
   while (l--) {
     switch (*s) {
       case '"':  case '\\':  case '\n':
-        luaL_addchar(L, '\\');
-        luaL_addchar(L, *s);
+        luaL_putchar(b, '\\');
+        luaL_putchar(b, *s);
         break;
-      case '\0': addnchar(L, "\\000", 4); break;
-      default: luaL_addchar(L, *s);
+      case '\0': luaL_addlstring(b, "\\000", 4); break;
+      default: luaL_putchar(b, *s);
     }
     s++;
   }
-  luaL_addchar(L, '"');
+  luaL_putchar(b, '"');
 }
 
+/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
+#define MAX_ITEM	512
 /* maximum size of each format specification (such as '%-099.99d') */
-#define MAX_FORMAT 20  /* arbitrary limit */
+#define MAX_FORMAT	20
 
-static void str_format (lua_State *L) {
+static int str_format (lua_State *L) {
   int arg = 1;
   const char *strfrmt = luaL_check_string(L, arg);
-  luaL_resetbuffer(L);
+  luaL_Buffer b;
+  luaL_buffinit(L, &b);
   while (*strfrmt) {
     if (*strfrmt != '%')
-      luaL_addchar(L, *strfrmt++);
+      luaL_putchar(&b, *strfrmt++);
     else if (*++strfrmt == '%')
-      luaL_addchar(L, *strfrmt++);  /* %% */
+      luaL_putchar(&b, *strfrmt++);  /* %% */
     else { /* format item */
       struct Capture cap;
       char form[MAX_FORMAT];  /* to store the format ('%...') */
-      char *buff;  /* to store the formatted item */
+      char buff[MAX_ITEM];  /* to store the formatted item */
       const char *initf = strfrmt;
       form[0] = '%';
       if (isdigit((unsigned char)*initf) && *(initf+1) == '$') {
@@ -558,7 +559,6 @@ static void str_format (lua_State *L) {
         lua_error(L, "invalid format (width or precision too long)");
       strncpy(form+1, initf, strfrmt-initf+1); /* +1 to include conversion */
       form[strfrmt-initf+2] = 0;
-      buff = luaL_openspace(L, 512);  /* 512 > len(format('%99.99f', -1e308)) */
       switch (*strfrmt++) {
         case 'c':  case 'd':  case 'i':
           sprintf(buff, form, luaL_check_int(L, arg));
@@ -570,15 +570,16 @@ static void str_format (lua_State *L) {
           sprintf(buff, form, luaL_check_number(L, arg));
           break;
         case 'q':
-          luaI_addquoted(L, arg);
+          luaI_addquoted(L, &b, arg);
           continue;  /* skip the "addsize" at the end */
         case 's': {
-          long l;
+          size_t l;
           const char *s = luaL_check_lstr(L, arg, &l);
           if (cap.capture[1].len == 0 && l >= 100) {
             /* no precision and string is too long to be formatted;
                keep original string */
-            addnchar(L, s, l);
+            lua_pushvalue(L, arg);
+            luaL_addvalue(&b);
             continue;  /* skip the "addsize" at the end */
           }
           else {
@@ -589,10 +590,11 @@ static void str_format (lua_State *L) {
         default:  /* also treat cases 'pnLlh' */
           lua_error(L, "invalid option in `format'");
       }
-      luaL_addsize(L, strlen(buff));
+      luaL_addlstring(&b, buff, strlen(buff));
     }
   }
-  closeandpush(L);  /* push the result */
+  luaL_pushresult(&b);
+  return 1;
 }
 
 
@@ -614,6 +616,6 @@ static const struct luaL_reg strlib[] = {
 /*
 ** Open string library
 */
-void lua_strlibopen (lua_State *L) {
+LUALIB_API void lua_strlibopen (lua_State *L) {
   luaL_openl(L, strlib);
 }

ltable.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.c,v 1.38 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: ltable.c,v 1.57 2000/10/05 12:14:08 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -18,21 +18,20 @@
 */
 
 
-#define LUA_REENTRANT
+#include "lua.h"
 
-#include "lauxlib.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
+#include "lstring.h"
 #include "ltable.h"
-#include "lua.h"
 
 
-#define gcsize(L, n)	numblocks(L, n*2, sizeof(Hash))
+#define gcsize(L, n)	(sizeof(Hash)+(n)*sizeof(Node))
 
 
 
-#define TagDefault TAG_TABLE
+#define TagDefault LUA_TTABLE
 
 
 
@@ -43,31 +42,35 @@
 Node *luaH_mainposition (const Hash *t, const TObject *key) {
   unsigned long h;
   switch (ttype(key)) {
-    case TAG_NUMBER:
+    case LUA_TNUMBER:
       h = (unsigned long)(long)nvalue(key);
       break;
-    case TAG_STRING: case TAG_USERDATA:
-      h = tsvalue(key)->hash;
+    case LUA_TSTRING:
+      h = tsvalue(key)->u.s.hash;
       break;
-    case TAG_TABLE:
-      h = IntPoint(L, avalue(key));
+    case LUA_TUSERDATA:
+      h = IntPoint(tsvalue(key));
       break;
-    case TAG_LCLOSURE:  case TAG_CCLOSURE:
-      h = IntPoint(L, clvalue(key));
+    case LUA_TTABLE:
+      h = IntPoint(hvalue(key));
+      break;
+    case LUA_TFUNCTION:
+      h = IntPoint(clvalue(key));
       break;
     default:
       return NULL;  /* invalid key */
   }
-  LUA_ASSERT(L, h%(unsigned int)t->size == (h&((unsigned int)t->size-1)),
+  LUA_ASSERT(h%(unsigned int)t->size == (h&((unsigned int)t->size-1)),
             "a&(x-1) == a%x, for x power of 2");
-  return &t->node[h&((unsigned int)t->size-1)];
+  return &t->node[h&(t->size-1)];
 }
 
 
-const TObject *luaH_get (lua_State *L, const Hash *t, const TObject *key) {
+static const TObject *luaH_getany (lua_State *L, const Hash *t,
+                                   const TObject *key) {
   Node *n = luaH_mainposition(t, key);
   if (!n)
-    lua_error(L, "unexpected type to index table");
+    lua_error(L, "table index is nil");
   else do {
     if (luaO_equalObj(key, &n->key))
       return &n->val;
@@ -77,40 +80,109 @@ const TObject *luaH_get (lua_State *L, const Hash *t, const TObject *key) {
 }
 
 
-int luaH_pos (lua_State *L, const Hash *t, const TObject *key) {
-  const TObject *v = luaH_get(L, t, key);
-  return (v == &luaO_nilobject) ?  -1 :  /* key not found */
-      (int)(((const char *)v - (const char *)(&t->node[0].val))/sizeof(Node));
+/* specialized version for numbers */
+const TObject *luaH_getnum (const Hash *t, Number key) {
+  Node *n = &t->node[(unsigned long)(long)key&(t->size-1)];
+  do {
+    if (ttype(&n->key) == LUA_TNUMBER && nvalue(&n->key) == key)
+      return &n->val;
+    n = n->next;
+  } while (n);
+  return &luaO_nilobject;  /* key not found */
 }
 
 
+/* specialized version for strings */
+const TObject *luaH_getstr (const Hash *t, TString *key) {
+  Node *n = &t->node[key->u.s.hash&(t->size-1)];
+  do {
+    if (ttype(&n->key) == LUA_TSTRING && tsvalue(&n->key) == key)
+      return &n->val;
+    n = n->next;
+  } while (n);
+  return &luaO_nilobject;  /* key not found */
+}
 
-static Node *hashnodecreate (lua_State *L, int nhash) {
-  Node *v = luaM_newvector(L, nhash, Node);
-  int i;
-  for (i=0; i<nhash; i++) {
-    ttype(&v[i].key) = ttype(&v[i].val) = TAG_NIL;
-    v[i].next = NULL;
+
+const TObject *luaH_get (lua_State *L, const Hash *t, const TObject *key) {
+  switch (ttype(key)) {
+    case LUA_TNUMBER: return luaH_getnum(t, nvalue(key));
+    case LUA_TSTRING: return luaH_getstr(t, tsvalue(key));
+    default:         return luaH_getany(L, t, key);
   }
-  return v;
 }
 
 
-static void setnodevector (lua_State *L, Hash *t, int size) {
-  t->node = hashnodecreate(L, size);
+Node *luaH_next (lua_State *L, const Hash *t, const TObject *key) {
+  int i;
+  if (ttype(key) == LUA_TNIL)
+    i = 0;  /* first iteration */
+  else {
+    const TObject *v = luaH_get(L, t, key);
+    if (v == &luaO_nilobject)
+      lua_error(L, "invalid key for `next'");
+    i = (int)(((const char *)v -
+               (const char *)(&t->node[0].val)) / sizeof(Node)) + 1;
+  }
+  for (; i<t->size; i++) {
+    Node *n = node(t, i);
+    if (ttype(val(n)) != LUA_TNIL)
+      return n;
+  }
+  return NULL;  /* no more elements */
+}
+
+
+/*
+** try to remove a key without value from a table. To avoid problems with
+** hash, change `key' for a number with the same hash.
+*/
+void luaH_remove (Hash *t, TObject *key) {
+  if (ttype(key) == LUA_TNUMBER ||
+       (ttype(key) == LUA_TSTRING && tsvalue(key)->len <= 30))
+  return;  /* do not remove numbers nor small strings */
+  else {
+    /* try to find a number `n' with the same hash as `key' */
+    Node *mp = luaH_mainposition(t, key);
+    int n = mp - &t->node[0];
+    /* make sure `n' is not in `t' */
+    while (luaH_getnum(t, n) != &luaO_nilobject) {
+      if (n >= MAX_INT - t->size)
+        return;  /* give up; (to avoid overflow) */
+      n += t->size;
+    }
+    ttype(key) = LUA_TNUMBER;
+    nvalue(key) = n;
+    LUA_ASSERT(luaH_mainposition(t, key) == mp, "cannot change hash");
+  }
+}
+
+
+static void setnodevector (lua_State *L, Hash *t, lint32 size) {
+  int i;
+  if (size > MAX_INT)
+    lua_error(L, "table overflow");
+  t->node = luaM_newvector(L, size, Node);
+  for (i=0; i<(int)size; i++) {
+    ttype(&t->node[i].key) = ttype(&t->node[i].val) = LUA_TNIL;
+    t->node[i].next = NULL;
+  }
+  L->nblocks += gcsize(L, size) - gcsize(L, t->size);
   t->size = size;
   t->firstfree = &t->node[size-1];  /* first free position to be used */
-  L->nblocks += gcsize(L, size);
 }
 
 
 Hash *luaH_new (lua_State *L, int size) {
   Hash *t = luaM_new(L, Hash);
-  setnodevector(L, t, luaO_power2(size));
   t->htag = TagDefault;
   t->next = L->roottable;
   L->roottable = t;
-  t->marked = 0;
+  t->mark = t;
+  t->size = 0;
+  L->nblocks += gcsize(L, 0);
+  t->node = NULL;
+  setnodevector(L, t, luaO_power2(size));
   return t;
 }
 
@@ -122,65 +194,65 @@ void luaH_free (lua_State *L, Hash *t) {
 }
 
 
-static int newsize (const Hash *t) {
+static int numuse (const Hash *t) {
   Node *v = t->node;
   int size = t->size;
   int realuse = 0;
   int i;
   for (i=0; i<size; i++) {
-    if (ttype(&v[i].val) != TAG_NIL)
+    if (ttype(&v[i].val) != LUA_TNIL)
       realuse++;
   }
-  return luaO_power2(realuse+realuse/4+1);
+  return realuse;
 }
 
 
 static void rehash (lua_State *L, Hash *t) {
   int oldsize = t->size;
   Node *nold = t->node;
+  int nelems = numuse(t);
   int i;
-  L->nblocks -= gcsize(L, oldsize);
-  setnodevector(L, t, newsize(t));  /* create new array of nodes */
+  LUA_ASSERT(nelems<=oldsize, "wrong count");
+  if (nelems >= oldsize-oldsize/4)  /* using more than 3/4? */
+    setnodevector(L, t, (lint32)oldsize*2);
+  else if (nelems <= oldsize/4 &&  /* less than 1/4? */
+           oldsize > MINPOWER2)
+    setnodevector(L, t, oldsize/2);
+  else
+    setnodevector(L, t, oldsize);
   for (i=0; i<oldsize; i++) {
     Node *old = nold+i;
-    if (ttype(&old->val) != TAG_NIL)
-       luaH_set(L, t, &old->key, &old->val);
+    if (ttype(&old->val) != LUA_TNIL)
+      *luaH_set(L, t, &old->key) = old->val;
   }
   luaM_free(L, nold);  /* free old array */
 }
 
 
 /*
-** sets a pair key-value in a hash table; first, check whether key is
+** inserts a key into a hash table; first, check whether key is
 ** already present; if not, check whether key's main position is free;
 ** if not, check whether colliding node is in its main position or not;
-** if it is not, move colliding node to an empty place and put new pair
+** if it is not, move colliding node to an empty place and put new key
 ** in its main position; otherwise (colliding node is in its main position),
-** new pair goes to an empty position.
-** Tricky point: the only place where an old element is moved is when
-** we move the colliding node to an empty place; nevertheless, its old
-** value is still in that position until we set the value for the new
-** pair; therefore, even when `val' points to an element of this table
-** (this happens when we use `luaH_move'), there is no problem.
+** new key goes to an empty position.
 */
-void luaH_set (lua_State *L, Hash *t, const TObject *key, const TObject *val) {
+TObject *luaH_set (lua_State *L, Hash *t, const TObject *key) {
   Node *mp = luaH_mainposition(t, key);
   Node *n = mp;
   if (!mp)
-    lua_error(L, "unexpected type to index table");
+    lua_error(L, "table index is nil");
   do {  /* check whether `key' is somewhere in the chain */
-    if (luaO_equalObj(key, &n->key)) {
-      n->val = *val;  /* update value */
-      return;  /* that's all */
-    }
+    if (luaO_equalObj(key, &n->key))
+      return &n->val;  /* that's all */
     else n = n->next;
   } while (n);
   /* `key' not found; must insert it */
-  if (ttype(&mp->key) != TAG_NIL) {  /* main position is not free? */
+  if (ttype(&mp->key) != LUA_TNIL) {  /* main position is not free? */
     Node *othern;  /* main position of colliding node */
     n = t->firstfree;  /* get a free place */
     /* is colliding node out of its main position? (can only happens if
-       its position if after "firstfree") */
+       its position is after "firstfree") */
     if (mp > n && (othern=luaH_mainposition(t, &mp->key)) != mp) {
       /* yes; move colliding node into free position */
       while (othern->next != mp) othern = othern->next;  /* find previous */
@@ -196,29 +268,36 @@ void luaH_set (lua_State *L, Hash *t, const TObject *key, const TObject *val) {
     }
   }
   mp->key = *key;
-  mp->val = *val;
-  for (;;) {  /* check free places */
-    if (ttype(&t->firstfree->key) == TAG_NIL)
-      return;  /* OK; table still has a free place */
+  for (;;) {  /* correct `firstfree' */
+    if (ttype(&t->firstfree->key) == LUA_TNIL)
+      return &mp->val;  /* OK; table still has a free place */
     else if (t->firstfree == t->node) break;  /* cannot decrement from here */
     else (t->firstfree)--;
   }
   rehash(L, t);  /* no more free places */
+  return luaH_set(L, t, key);  /* `rehash' invalidates this insertion */
 }
 
 
-void luaH_setint (lua_State *L, Hash *t, int key, const TObject *val) {
+TObject *luaH_setint (lua_State *L, Hash *t, int key) {
   TObject index;
-  ttype(&index) = TAG_NUMBER;
+  ttype(&index) = LUA_TNUMBER;
   nvalue(&index) = key;
-  luaH_set(L, t, &index, val);
+  return luaH_set(L, t, &index);
 }
 
 
-const TObject *luaH_getint (lua_State *L, const Hash *t, int key) {
-  TObject index;
-  ttype(&index) = TAG_NUMBER;
-  nvalue(&index) = key;
-  return luaH_get(L, t, &index);
+void luaH_setstrnum (lua_State *L, Hash *t, TString *key, Number val) {
+  TObject *value, index;
+  ttype(&index) = LUA_TSTRING;
+  tsvalue(&index) = key;
+  value = luaH_set(L, t, &index);
+  ttype(value) = LUA_TNUMBER;
+  nvalue(value) = val;
+}
+
+
+const TObject *luaH_getglobal (lua_State *L, const char *name) {
+  return luaH_getstr(L->gt, luaS_new(L, name));
 }
 

ltable.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltable.h,v 1.17 1999/11/23 13:58:02 roberto Exp roberto $
+** $Id: ltable.h,v 1.23 2000/06/06 16:31:41 roberto Exp roberto $
 ** Lua tables (hash)
 ** See Copyright Notice in lua.h
 */
@@ -14,16 +14,18 @@
 #define key(n)		(&(n)->key)
 #define val(n)		(&(n)->val)
 
-#define luaH_move(L, t,from,to)	(luaH_setint(L, t, to, luaH_getint(L, t, from)))
-
 Hash *luaH_new (lua_State *L, int nhash);
 void luaH_free (lua_State *L, Hash *t);
 const TObject *luaH_get (lua_State *L, const Hash *t, const TObject *key);
-void luaH_set (lua_State *L, Hash *t, const TObject *key, const TObject *val);
-int luaH_pos (lua_State *L, const Hash *t, const TObject *r);
-void luaH_setint (lua_State *L, Hash *t, int key, const TObject *val);
-const TObject *luaH_getint (lua_State *L, const Hash *t, int key);
+const TObject *luaH_getnum (const Hash *t, Number key);
+const TObject *luaH_getstr (const Hash *t, TString *key);
+void luaH_remove (Hash *t, TObject *key);
+TObject *luaH_set (lua_State *L, Hash *t, const TObject *key);
+Node * luaH_next (lua_State *L, const Hash *t, const TObject *r);
+TObject *luaH_setint (lua_State *L, Hash *t, int key);
+void luaH_setstrnum (lua_State *L, Hash *t, TString *key, Number val);
 unsigned long luaH_hash (lua_State *L, const TObject *key);
+const TObject *luaH_getglobal (lua_State *L, const char *name);
 
 /* exported only for debugging */
 Node *luaH_mainposition (const Hash *t, const TObject *key);

ltests.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltests.c,v 1.15 2000/04/13 16:51:01 roberto Exp roberto $
+** $Id: ltests.c,v 1.53 2000/10/30 16:29:59 roberto Exp roberto $
 ** Internal Module for Debugging of the Lua Implementation
 ** See Copyright Notice in lua.h
 */
@@ -10,34 +10,38 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+
+#include "lua.h"
 
 #include "lapi.h"
 #include "lauxlib.h"
+#include "lcode.h"
+#include "ldebug.h"
+#include "ldo.h"
+#include "lfunc.h"
 #include "lmem.h"
 #include "lopcodes.h"
 #include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
-#include "lua.h"
 #include "luadebug.h"
+#include "lualib.h"
 
 
 void luaB_opentests (lua_State *L);
 
 
 /*
-** The whole module only makes sense with DEBUG on
+** The whole module only makes sense with LUA_DEBUG on
 */
-#ifdef DEBUG
+#ifdef LUA_DEBUG
 
 
 
-static void setnameval (lua_State *L, lua_Object t, const char *name, int val) {
-  lua_pushobject(L, t);
+static void setnameval (lua_State *L, const char *name, int val) {
   lua_pushstring(L, name);
   lua_pushnumber(L, val);
-  lua_settable(L);
+  lua_settable(L, -3);
 }
 
 
@@ -48,168 +52,296 @@ static void setnameval (lua_State *L, lua_Object t, const char *name, int val) {
 */
 
 
-#define O(o)	sprintf(buff, "%s", o)
-#define U(o)	sprintf(buff, "%-12s%4u", o, GETARG_U(i))
-#define S(o)	sprintf(buff, "%-12s%4d", o, GETARG_S(i))
-#define AB(o)	sprintf(buff, "%-12s%4d %4d", o, GETARG_A(i), GETARG_B(i))
+static const char *const instrname[NUM_OPCODES] = {
+  "END", "RETURN", "CALL", "TAILCALL", "PUSHNIL", "POP", "PUSHINT", 
+  "PUSHSTRING", "PUSHNUM", "PUSHNEGNUM", "PUSHUPVALUE", "GETLOCAL", 
+  "GETGLOBAL", "GETTABLE", "GETDOTTED", "GETINDEXED", "PUSHSELF", 
+  "CREATETABLE", "SETLOCAL", "SETGLOBAL", "SETTABLE", "SETLIST", "SETMAP", 
+  "ADD", "ADDI", "SUB", "MULT", "DIV", "POW", "CONCAT", "MINUS", "NOT", 
+  "JMPNE", "JMPEQ", "JMPLT", "JMPLE", "JMPGT", "JMPGE", "JMPT", "JMPF", 
+  "JMPONT", "JMPONF", "JMP", "PUSHNILJMP", "FORPREP", "FORLOOP", "LFORPREP", 
+  "LFORLOOP", "CLOSURE"
+};
 
 
-
-static int pushop (lua_State *L, Instruction i) {
+static int pushop (lua_State *L, Proto *p, int pc) {
   char buff[100];
-  switch (GET_OPCODE(i)) {
-    case OP_END: O("END"); lua_pushstring(L, buff); return 0;
-    case OP_RETURN: U("RETURN"); break;
-    case OP_CALL: AB("CALL"); break;
-    case OP_TAILCALL: AB("TAILCALL"); break;
-    case OP_PUSHNIL: U("PUSHNIL"); break;
-    case OP_POP: U("POP"); break;
-    case OP_PUSHINT: S("PUSHINT"); break;
-    case OP_PUSHSTRING: U("PUSHSTRING"); break;
-    case OP_PUSHNUM: U("PUSHNUM"); break;
-    case OP_PUSHNEGNUM: U("PUSHNEGNUM"); break;
-    case OP_PUSHUPVALUE: U("PUSHUPVALUE"); break;
-    case OP_GETLOCAL: U("GETLOCAL"); break;
-    case OP_GETGLOBAL: U("GETGLOBAL"); break;
-    case OP_GETTABLE: O("GETTABLE"); break;
-    case OP_GETDOTTED: U("GETDOTTED"); break;
-    case OP_GETINDEXED: U("GETINDEXED"); break;
-    case OP_PUSHSELF: U("PUSHSELF"); break;
-    case OP_CREATETABLE: U("CREATETABLE"); break;
-    case OP_SETLOCAL: U("SETLOCAL"); break;
-    case OP_SETGLOBAL: U("SETGLOBAL"); break;
-    case OP_SETTABLE: AB("SETTABLE"); break;
-    case OP_SETLIST: AB("SETLIST"); break;
-    case OP_SETMAP: U("SETMAP"); break;
-    case OP_ADD: O("ADD"); break;
-    case OP_ADDI: S("ADDI"); break;
-    case OP_SUB: O("SUB"); break;
-    case OP_MULT: O("MULT"); break;
-    case OP_DIV: O("DIV"); break;
-    case OP_POW: O("POW"); break;
-    case OP_CONCAT: U("CONCAT"); break;
-    case OP_MINUS: O("MINUS"); break;
-    case OP_NOT: O("NOT"); break;
-    case OP_JMPNE: S("JMPNE"); break;
-    case OP_JMPEQ: S("JMPEQ"); break;
-    case OP_JMPLT: S("JMPLT"); break;
-    case OP_JMPLE: S("JMPLE"); break;
-    case OP_JMPGT: S("JMPGT"); break;
-    case OP_JMPGE: S("JMPGE"); break;
-    case OP_JMPT: S("JMPT"); break;
-    case OP_JMPF: S("JMPF"); break;
-    case OP_JMPONT: S("JMPONT"); break;
-    case OP_JMPONF: S("JMPONF"); break;
-    case OP_JMP: S("JMP"); break;
-    case OP_PUSHNILJMP: O("PUSHNILJMP"); break;
-    case OP_FORPREP: S("OP_FORPREP"); break;
-    case OP_FORLOOP: S("OP_FORLOOP"); break;
-    case OP_CLOSURE: AB("CLOSURE"); break;
-    case OP_SETLINE: U("SETLINE"); break;
+  Instruction i = p->code[pc];
+  OpCode o = GET_OPCODE(i);
+  const char *name = instrname[o];
+  sprintf(buff, "%5d - ", luaG_getline(p->lineinfo, pc, 1, NULL));
+  switch ((enum Mode)luaK_opproperties[o].mode) {  
+    case iO:
+      sprintf(buff+8, "%-12s", name);
+      break;
+    case iU:
+      sprintf(buff+8, "%-12s%4u", name, GETARG_U(i));
+      break;
+    case iS:
+      sprintf(buff+8, "%-12s%4d", name, GETARG_S(i));
+      break;
+    case iAB:
+      sprintf(buff+8, "%-12s%4d %4d", name, GETARG_A(i), GETARG_B(i));
+      break;
   }
   lua_pushstring(L, buff);
+  return (o != OP_END);
+}
+
+
+static int listcode (lua_State *L) {
+  int pc;
+  Proto *p;
+  int res;
+  luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(luaA_index(L, 1))->f.l;
+  lua_newtable(L);
+  setnameval(L, "maxstack", p->maxstacksize);
+  setnameval(L, "numparams", p->numparams);
+  pc = 0;
+  do {
+    lua_pushnumber(L, pc+1);
+    res = pushop(L, p, pc++);
+    lua_settable(L, -3);
+  } while (res);
   return 1;
 }
 
-static void listcode (lua_State *L) {
-  lua_Object o = luaL_nonnullarg(L, 1);
-  lua_Object t = lua_createtable(L);
-  Instruction *pc;
+
+static int liststrings (lua_State *L) {
   Proto *p;
-  int res;
-  luaL_arg_check(L, ttype(o) == TAG_LCLOSURE, 1, "Lua function expected");
-  p = clvalue(o)->f.l;
-  setnameval(L, t, "maxstack", p->maxstacksize);
-  setnameval(L, t, "numparams", p->numparams);
-  pc = p->code;
-  do {
-    lua_pushobject(L, t);
-    lua_pushnumber(L, pc - p->code + 1);
-    res = pushop(L, *pc++);
-    lua_settable(L);
-  } while (res);
-  lua_pushobject(L, t);
+  int i;
+  luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(luaA_index(L, 1))->f.l;
+  lua_newtable(L);
+  for (i=0; i<p->nkstr; i++) {
+    lua_pushnumber(L, i+1);
+    lua_pushstring(L, p->kstr[i]->str);
+    lua_settable(L, -3);
+  }
+  return 1;
+}
+
+
+static int listlocals (lua_State *L) {
+  Proto *p;
+  int pc = luaL_check_int(L, 2) - 1;
+  int i = 0;
+  const char *name;
+  luaL_arg_check(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1),
+                 1, "Lua function expected");
+  p = clvalue(luaA_index(L, 1))->f.l;
+  while ((name = luaF_getlocalname(p, ++i, pc)) != NULL)
+    lua_pushstring(L, name);
+  return i-1;
 }
 
 /* }====================================================== */
 
 
 
-static void get_limits (lua_State *L) {
-  lua_Object t = lua_createtable(L);
-  setnameval(L, t, "SIZE_OP", SIZE_OP);
-  setnameval(L, t, "SIZE_U", SIZE_U);
-  setnameval(L, t, "SIZE_A", SIZE_A);
-  setnameval(L, t, "SIZE_B", SIZE_B);
-  setnameval(L, t, "MAXARG_U", MAXARG_U);
-  setnameval(L, t, "MAXARG_S", MAXARG_S);
-  setnameval(L, t, "MAXARG_A", MAXARG_A);
-  setnameval(L, t, "MAXARG_B", MAXARG_B);
-  setnameval(L, t, "MAXSTACK", MAXSTACK);
-  setnameval(L, t, "MAXLOCALS", MAXLOCALS);
-  setnameval(L, t, "MAXUPVALUES", MAXUPVALUES);
-  setnameval(L, t, "MAXVARSLH", MAXVARSLH);
-  setnameval(L, t, "MAXPARAMS", MAXPARAMS);
-  setnameval(L, t, "LFPF", LFIELDS_PER_FLUSH);
-  setnameval(L, t, "RFPF", RFIELDS_PER_FLUSH);
-  lua_pushobject(L, t);
+static int get_limits (lua_State *L) {
+  lua_newtable(L);
+  setnameval(L, "BITS_INT", BITS_INT);
+  setnameval(L, "LFPF", LFIELDS_PER_FLUSH);
+  setnameval(L, "MAXARG_A", MAXARG_A);
+  setnameval(L, "MAXARG_B", MAXARG_B);
+  setnameval(L, "MAXARG_S", MAXARG_S);
+  setnameval(L, "MAXARG_U", MAXARG_U);
+  setnameval(L, "MAXLOCALS", MAXLOCALS);
+  setnameval(L, "MAXPARAMS", MAXPARAMS);
+  setnameval(L, "MAXSTACK", MAXSTACK);
+  setnameval(L, "MAXUPVALUES", MAXUPVALUES);
+  setnameval(L, "MAXVARSLH", MAXVARSLH);
+  setnameval(L, "RFPF", RFIELDS_PER_FLUSH);
+  setnameval(L, "SIZE_A", SIZE_A);
+  setnameval(L, "SIZE_B", SIZE_B);
+  setnameval(L, "SIZE_OP", SIZE_OP);
+  setnameval(L, "SIZE_U", SIZE_U);
+  return 1;
 }
 
 
-static void mem_query (lua_State *L) {
-  lua_pushnumber(L, memdebug_total);
-  lua_pushnumber(L, memdebug_numblocks);
-  lua_pushnumber(L, memdebug_maxmem);
-}
-
-
-static void hash_query (lua_State *L) {
-  lua_Object o = luaL_nonnullarg(L, 1);
-  if (lua_getparam(L, 2) == LUA_NOOBJECT) {
-    luaL_arg_check(L, ttype(o) == TAG_STRING, 1, "string expected");
-    lua_pushnumber(L, tsvalue(o)->hash);
+static int mem_query (lua_State *L) {
+  if (lua_isnull(L, 1)) {
+    lua_pushnumber(L, memdebug_total);
+    lua_pushnumber(L, memdebug_numblocks);
+    lua_pushnumber(L, memdebug_maxmem);
+    return 3;
   }
   else {
-    const Hash *t = avalue(luaL_tablearg(L, 2));
-    lua_pushnumber(L, luaH_mainposition(t, o) - t->node);
+    memdebug_memlimit = luaL_check_int(L, 1);
+    return 0;
   }
 }
 
 
-static void table_query (lua_State *L) {
-  const Hash *t = avalue(luaL_tablearg(L, 1));
+static int hash_query (lua_State *L) {
+  if (lua_isnull(L, 2)) {
+    luaL_arg_check(L, lua_tag(L, 1) == LUA_TSTRING, 1, "string expected");
+    lua_pushnumber(L, tsvalue(luaA_index(L, 1))->u.s.hash);
+  }
+  else {
+    Hash *t;
+    luaL_checktype(L, 2, LUA_TTABLE);
+    t = hvalue(luaA_index(L, 2));
+    lua_pushnumber(L, luaH_mainposition(t, luaA_index(L, 1)) - t->node);
+  }
+  return 1;
+}
+
+
+static int table_query (lua_State *L) {
+  const Hash *t;
   int i = luaL_opt_int(L, 2, -1);
+  luaL_checktype(L, 1, LUA_TTABLE);
+  t = hvalue(luaA_index(L, 1));
   if (i == -1) {
     lua_pushnumber(L, t->size);
     lua_pushnumber(L, t->firstfree - t->node);
+    return 2;
   }
   else if (i < t->size) {
     luaA_pushobject(L, &t->node[i].key);
     luaA_pushobject(L, &t->node[i].val);
-    if (t->node[i].next)
+    if (t->node[i].next) {
       lua_pushnumber(L, t->node[i].next - t->node);
+      return 3;
+    }
+    else
+      return 2;
   }
+  return 0;
 }
 
 
-static void string_query (lua_State *L) {
-  int h = luaL_check_int(L, 1) - 1;
+static int string_query (lua_State *L) {
+  stringtable *tb = (*luaL_check_string(L, 1) == 's') ? &L->strt : &L->udt;
   int s = luaL_opt_int(L, 2, 0) - 1;
   if (s==-1) {
-    if (h < NUM_HASHS) {
-      lua_pushnumber(L, L->string_root[h].nuse);
-      lua_pushnumber(L, L->string_root[h].size);
+    lua_pushnumber(L ,tb->nuse);
+    lua_pushnumber(L ,tb->size);
+    return 2;
+  }
+  else if (s < tb->size) {
+    TString *ts;
+    int n = 0;
+    for (ts = tb->hash[s]; ts; ts = ts->nexthash) {
+      ttype(L->top) = LUA_TSTRING;
+      tsvalue(L->top) = ts;
+      incr_top;
+      n++;
     }
+    return n;
+  }
+  return 0;
+}
+
+
+static int tref (lua_State *L) {
+  luaL_checkany(L, 1);
+  lua_pushvalue(L, 1);
+  lua_pushnumber(L, lua_ref(L, luaL_opt_int(L, 2, 1)));
+  return 1;
+}
+
+static int getref (lua_State *L) {
+  if (lua_getref(L, luaL_check_int(L, 1)))
+    return 1;
+  else
+    return 0;
+}
+
+static int unref (lua_State *L) {
+  lua_unref(L, luaL_check_int(L, 1));
+  return 0;
+}
+
+static int newuserdata (lua_State *L) {
+  if (lua_isnumber(L, 2))
+    lua_pushusertag(L, (void *)luaL_check_int(L, 1), luaL_check_int(L, 2));
+  else
+    lua_newuserdata(L, luaL_check_int(L, 1));
+  return 1;
+}
+
+static int udataval (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TUSERDATA);
+  lua_pushnumber(L, (int)lua_touserdata(L, 1));
+  return 1;
+}
+
+static int newstate (lua_State *L) {
+  lua_State *L1 = lua_open(luaL_check_int(L, 1));
+  if (L1)
+    lua_pushuserdata(L, L1);
+  else
+    lua_pushnil(L);
+  return 1;
+}
+
+static int loadlib (lua_State *L) {
+  lua_State *L1 = (lua_State *)lua_touserdata(L, 1);
+  switch (*luaL_check_string(L, 2)) {
+    case 'm': lua_mathlibopen(L1); break;
+    case 's': lua_strlibopen(L1); break;
+    case 'i': lua_iolibopen(L1); break;
+    case 'd': lua_dblibopen(L1); break;
+    case 'b': lua_baselibopen(L1); break;
+    default: luaL_argerror(L, 2, "invalid option");
+  }
+  return 0;
+}
+
+static int closestate (lua_State *L) {
+  luaL_checktype(L, 1, LUA_TUSERDATA);
+  lua_close((lua_State *)lua_touserdata(L, 1));
+  return 0;
+}
+
+static int doremote (lua_State *L) {
+  lua_State *L1;
+  const char *code = luaL_check_string(L, 2);
+  int status;
+  luaL_checktype(L, 1, LUA_TUSERDATA);
+  L1 = (lua_State *)lua_touserdata(L, 1);
+  status = lua_dostring(L1, code);
+  if (status != 0) {
+    lua_pushnil(L);
+    lua_pushnumber(L, status);
+    return 2;
   }
   else {
-    TString *ts = L->string_root[h].hash[s];
-    for (ts = L->string_root[h].hash[s]; ts; ts = ts->nexthash) {
-      if (ts->constindex == -1) lua_pushstring(L, "<USERDATA>");
-      else lua_pushstring(L, ts->str);
-    }
+    int i = 0;
+    while (!lua_isnull(L1, ++i))
+      lua_pushstring(L, lua_tostring(L1, i));
+    return i-1;
   }
 }
 
+static int settagmethod (lua_State *L) {
+  int tag = luaL_check_int(L, 1);
+  const char *event = luaL_check_string(L, 2);
+  luaL_checkany(L, 3);
+  lua_gettagmethod(L, tag, event);
+  lua_pushvalue(L, 3);
+  lua_settagmethod(L, tag, event);
+  return 1;
+}
+
+static int pushbool (lua_State *L, int b) {
+  if (b) lua_pushnumber(L, 1);
+  else lua_pushnil(L);
+  return 1;
+}
+
+static int equal (lua_State *L) {
+  return pushbool(L, lua_equal(L, 1, 2));
+}
+
+  
 
 /*
 ** {======================================================
@@ -224,21 +356,25 @@ static void skip (const char **pc) {
   while (**pc != '\0' && strchr(delimits, **pc)) (*pc)++;
 }
 
-static int getnum (const char **pc) {
+static int getnum (lua_State *L, const char **pc) {
   int res = 0;
+  int sig = 1;
   skip(pc);
+  if (**pc == '.') {
+    res = (int)lua_tonumber(L, -1);
+    lua_pop(L, 1);
+    (*pc)++;
+    return res;
+  }
+  else if (**pc == '-') {
+    sig = -1;
+    (*pc)++;
+  }
   while (isdigit(**pc)) res = res*10 + (*(*pc)++) - '0';
-  return res;
+  return sig*res;
 }
   
-static int getreg (lua_State *L, const char **pc) {
-  skip(pc);
-  if (*(*pc)++ != 'r') lua_error(L, "`testC' expecting a register");
-  return getnum(pc);
-}
-
-static const char *getname (const char **pc) {
-  static char buff[30];
+static const char *getname (char *buff, const char **pc) {
   int i = 0;
   skip(pc);
   while (**pc != '\0' && !strchr(delimits, **pc))
@@ -250,149 +386,120 @@ static const char *getname (const char **pc) {
 
 #define EQ(s1)	(strcmp(s1, inst) == 0)
 
+#define getnum	((getnum)(L, &pc))
+#define getname	((getname)(buff, &pc))
 
-static void testC (lua_State *L) {
-  lua_Object reg[10];
+
+static int testC (lua_State *L) {
+  char buff[30];
   const char *pc = luaL_check_string(L, 1);
   for (;;) {
-    const char *inst = getname(&pc);
-    if EQ("") return;
-    else if EQ("pushnum") {
-      lua_pushnumber(L, getnum(&pc));
+    const char *inst = getname;
+    if EQ("") return 0;
+    else if EQ("isnumber") {
+      lua_pushnumber(L, lua_isnumber(L, getnum));
     }
-    else if EQ("createtable") {
-      reg[getreg(L, &pc)] = lua_createtable(L);
+    else if EQ("isstring") {
+      lua_pushnumber(L, lua_isstring(L, getnum));
     }
-    else if EQ("closure") {
-      lua_CFunction f = lua_getcfunction(L, lua_getglobal(L, getname(&pc)));
-      lua_pushcclosure(L, f, getnum(&pc));
+    else if EQ("istable") {
+      lua_pushnumber(L, lua_istable(L, getnum));
+    }
+    else if EQ("iscfunction") {
+      lua_pushnumber(L, lua_iscfunction(L, getnum));
+    }
+    else if EQ("isfunction") {
+      lua_pushnumber(L, lua_isfunction(L, getnum));
+    }
+    else if EQ("isuserdata") {
+      lua_pushnumber(L, lua_isuserdata(L, getnum));
+    }
+    else if EQ("isnil") {
+      lua_pushnumber(L, lua_isnil(L, getnum));
+    }
+    else if EQ("isnull") {
+      lua_pushnumber(L, lua_isnull(L, getnum));
+    }
+    else if EQ("tonumber") {
+      lua_pushnumber(L, lua_tonumber(L, getnum));
+    }
+    else if EQ("tostring") {
+      lua_pushstring(L, lua_tostring(L, getnum));
+    }
+    else if EQ("tonumber") {
+      lua_pushnumber(L, lua_tonumber(L, getnum));
+    }
+    else if EQ("strlen") {
+      lua_pushnumber(L, lua_strlen(L, getnum));
+    }
+    else if EQ("tocfunction") {
+      lua_pushcfunction(L, lua_tocfunction(L, getnum));
+    }
+    else if EQ("return") {
+      return getnum;
+    }
+    else if EQ("gettop") {
+      lua_pushnumber(L, lua_gettop(L));
+    }
+    else if EQ("settop") {
+      lua_settop(L, getnum);
     }
     else if EQ("pop") {
-      reg[getreg(L, &pc)] = lua_pop(L);
+      lua_pop(L, getnum);
     }
-    else if EQ("getglobal") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getglobal(L, getname(&pc));
+    else if EQ("pushnum") {
+      lua_pushnumber(L, getnum);
     }
-    else if EQ("rawgetglobal") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_rawgetglobal(L, getname(&pc));
+    else if EQ("pushvalue") {
+      lua_pushvalue(L, getnum);
     }
-    else if EQ("ref") {
-      lua_pushnumber(L, lua_ref(L, 0));
-      reg[getreg(L, &pc)] = lua_pop(L);
+    else if EQ("remove") {
+      lua_remove(L, getnum);
     }
-    else if EQ("reflock") {
-      lua_pushnumber(L, lua_ref(L, 1));
-      reg[getreg(L, &pc)] = lua_pop(L);
-    }
-    else if EQ("getref") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getref(L, (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("unref") {
-      lua_unref(L, (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("getparam") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getparam(L, getnum(&pc)+1);  /* skips the command itself */
-    }
-    else if EQ("getresult") {
-      int n = getreg(L, &pc);
-      reg[n] = lua_getparam(L, getnum(&pc));
-    }
-    else if EQ("setglobal") {
-      lua_setglobal(L, getname(&pc));
-    }
-    else if EQ("rawsetglobal") {
-      lua_rawsetglobal(L, getname(&pc));
-    }
-    else if EQ("pushstring") {
-      lua_pushstring(L, getname(&pc));
-    }
-    else if EQ("pushreg") {
-      lua_pushobject(L, reg[getreg(L, &pc)]);
-    }
-    else if EQ("call") {
-      if (lua_call(L, getname(&pc))) lua_error(L, NULL);
+    else if EQ("insert") {
+      lua_insert(L, getnum);
     }
     else if EQ("gettable") {
-      reg[getreg(L, &pc)] = lua_gettable(L);
-    }
-    else if EQ("rawgettable") {
-      reg[getreg(L, &pc)] = lua_rawgettable(L);
+      lua_gettable(L, getnum);
     }
     else if EQ("settable") {
-      lua_settable(L);
-    }
-    else if EQ("rawsettable") {
-      lua_rawsettable(L);
-    }
-    else if EQ("tag") {
-      lua_pushnumber(L, lua_tag(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("type") {
-      lua_pushstring(L, lua_type(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("nextvar") {
-      lua_pushstring(L, lua_nextvar(L, lua_getstring(L, reg[getreg(L, &pc)])));
+      lua_settable(L, getnum);
     }
     else if EQ("next") {
-      int n = getreg(L, &pc);
-      n = lua_next(L, reg[n], (int)lua_getnumber(L, reg[getreg(L, &pc)]));
-      lua_pushnumber(L, n);
+      lua_next(L, -2);
     }
-    else if EQ("equal") {
-      int n1 = getreg(L, &pc);
-      int n2 = getreg(L, &pc);
-      lua_pushnumber(L, lua_equal(L, reg[n1], reg[n2]));
+    else if EQ("concat") {
+      lua_concat(L, getnum);
     }
-    else if EQ("pushusertag") {
-      int val = getreg(L, &pc);
-      int tag = getreg(L, &pc);
-      lua_pushusertag(L, (void *)(int)lua_getnumber(L, reg[val]),
-                         (int)lua_getnumber(L, reg[tag]));
+    else if EQ("rawcall") {
+      int narg = getnum;
+      int nres = getnum;
+      lua_rawcall(L, narg, nres);
     }
-    else if EQ("udataval") {
-      int n = getreg(L, &pc);
-      lua_pushnumber(L, (int)lua_getuserdata(L, reg[getreg(L, &pc)]));
-      reg[n] = lua_pop(L);
+    else if EQ("call") {
+      int narg = getnum;
+      int nres = getnum;
+      lua_call(L, narg, nres);
+    }
+    else if EQ("dostring") {
+      lua_dostring(L, luaL_check_string(L, getnum));
     }
     else if EQ("settagmethod") {
-      int n = getreg(L, &pc);
-      lua_settagmethod(L, (int)lua_getnumber(L, reg[n]), getname(&pc));
+      int tag = getnum;
+      const char *event = getname;
+      lua_settagmethod(L, tag, event);
     }
-    else if EQ("beginblock") {
-      lua_beginblock(L);
+    else if EQ("gettagmethod") {
+      int tag = getnum;
+      const char *event = getname;
+      lua_gettagmethod(L, tag, event);
     }
-    else if EQ("endblock") {
-      lua_endblock(L);
+    else if EQ("type") {
+      lua_pushstring(L, lua_typename(L, lua_type(L, getnum)));
     }
-    else if EQ("newstate") {
-      int stacksize = getnum(&pc);
-      lua_State *L1 = lua_newstate("stack", stacksize,
-                                   "builtin", getnum(&pc), NULL);
-      lua_pushuserdata(L, L1);
-    }
-    else if EQ("closestate") {
-      lua_close((lua_State *)lua_getuserdata(L, reg[getreg(L, &pc)]));
-    }
-    else if EQ("doremote") {
-      lua_Object ol1 = reg[getreg(L, &pc)];
-      lua_Object str = reg[getreg(L, &pc)];
-      lua_State *L1;
-      lua_Object temp;
-      int i;
-      if (!lua_isuserdata(L, ol1) || !lua_isstring(L, str))
-        lua_error(L, "bad arguments for `doremote'");
-      L1 = (lua_State *)lua_getuserdata(L, ol1);
-      lua_dostring(L1, lua_getstring(L, str));
-      i = 1;
-      while ((temp = lua_getresult(L1, i++)) != LUA_NOOBJECT)
-        lua_pushstring(L, lua_getstring(L1, temp));
-    }
-    else luaL_verror(L, "unknown command in `testC': %.20s", inst);
+    else luaL_verror(L, "unknown instruction %.30s", buff);
   }
+  return 0;
 }
 
 /* }====================================================== */
@@ -403,15 +510,34 @@ static const struct luaL_reg tests_funcs[] = {
   {"hash", hash_query},
   {"limits", get_limits},
   {"listcode", listcode},
+  {"liststrings", liststrings},
+  {"listlocals", listlocals},
+  {"loadlib", loadlib},
   {"querystr", string_query},
   {"querytab", table_query},
   {"testC", testC},
+  {"ref", tref},
+  {"getref", getref},
+  {"unref", unref},
+  {"newuserdata", newuserdata},
+  {"udataval", udataval},
+  {"newstate", newstate},
+  {"closestate", closestate},
+  {"doremote", doremote},
+  {"settagmethod", settagmethod},
+  {"equal", equal},
   {"totalmem", mem_query}
 };
 
 
 void luaB_opentests (lua_State *L) {
-  luaL_openl(L, tests_funcs);
+  lua_newtable(L);
+  lua_getglobals(L);
+  lua_pushvalue(L, -2);
+  lua_setglobals(L);
+  luaL_openl(L, tests_funcs);  /* open functions inside new table */
+  lua_setglobals(L);  /* restore old table of globals */
+  lua_setglobal(L, "T");  /* set new table as global T */
 }
 
 #endif

ltm.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.c,v 1.38 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: ltm.c,v 1.55 2000/10/20 16:39:03 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -8,16 +8,16 @@
 #include <stdio.h>
 #include <string.h>
 
-#define LUA_REENTRANT
+#include "lua.h"
 
-#include "lauxlib.h"
+#include "ldo.h"
 #include "lmem.h"
 #include "lobject.h"
 #include "lstate.h"
 #include "ltm.h"
 
 
-const char *const luaT_eventname[] = {  /* ORDER IM */
+const char *const luaT_eventname[] = {  /* ORDER TM */
   "gettable", "settable", "index", "getglobal", "setglobal", "add", "sub",
   "mul", "div", "pow", "unm", "lt", "concat", "gc", "function",
   "le", "gt", "ge",  /* deprecated options!! */
@@ -25,57 +25,69 @@ const char *const luaT_eventname[] = {  /* ORDER IM */
 };
 
 
+static int findevent (const char *name) {
+  int i;
+  for (i=0; luaT_eventname[i]; i++)
+    if (strcmp(luaT_eventname[i], name) == 0)
+      return i;
+  return -1;  /* name not found */
+}
+
+
 static int luaI_checkevent (lua_State *L, const char *name, int t) {
-  int e = luaL_findstring(name, luaT_eventname);
-  if (e >= IM_N)
-    luaL_verror(L, "event `%.50s' is deprecated", name);
-  if (e == IM_GC && t == TAG_TABLE)
-    luaL_verror(L, "event `gc' for tables is deprecated");
+  int e = findevent(name);
+  if (e >= TM_N)
+    luaO_verror(L, "event `%.50s' is deprecated", name);
+  if (e == TM_GC && t == LUA_TTABLE)
+    luaO_verror(L, "event `gc' for tables is deprecated");
   if (e < 0)
-    luaL_verror(L, "`%.50s' is not a valid event name", name);
+    luaO_verror(L, "`%.50s' is not a valid event name", name);
   return e;
 }
 
 
 
-/* events in TAG_NIL are all allowed, since this is used as a
+/* events in LUA_TNIL are all allowed, since this is used as a
 *  'placeholder' for "default" fallbacks
 */
-/* ORDER LUA_T, ORDER IM */
-static const char luaT_validevents[NUM_TAGS][IM_N] = {
-  {1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* TAG_USERDATA */
-  {1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1},  /* TAG_NUMBER */
-  {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},  /* TAG_STRING */
-  {0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* TAG_TABLE */
-  {1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* TAG_LCLOSURE */
-  {1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0},  /* TAG_CCLOSURE */
-  {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}   /* TAG_NIL */
+/* ORDER LUA_T, ORDER TM */
+static const char luaT_validevents[NUM_TAGS][TM_N] = {
+  {1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* LUA_TUSERDATA */
+  {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},  /* LUA_TNIL */
+  {1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1},  /* LUA_TNUMBER */
+  {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},  /* LUA_TSTRING */
+  {0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1},  /* LUA_TTABLE */
+  {1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0}   /* LUA_TFUNCTION */
 };
 
 int luaT_validevent (int t, int e) {  /* ORDER LUA_T */
-  return (t > TAG_NIL) ?  1 : luaT_validevents[t][e];
+  return (t >= NUM_TAGS) ?  1 : luaT_validevents[t][e];
 }
 
 
 static void init_entry (lua_State *L, int tag) {
   int i;
-  for (i=0; i<IM_N; i++)
-    ttype(luaT_getim(L, tag, i)) = TAG_NIL;
+  for (i=0; i<TM_N; i++)
+    luaT_gettm(L, tag, i) = NULL;
+  L->TMtable[tag].collected = NULL;
 }
 
 
 void luaT_init (lua_State *L) {
   int t;
+  luaM_growvector(L, L->TMtable, 0, NUM_TAGS, struct TM, "", MAX_INT);
+  L->nblocks += NUM_TAGS*sizeof(struct TM);
   L->last_tag = NUM_TAGS-1;
-  luaM_growvector(L, L->IMtable, 0, NUM_TAGS, struct IM, arrEM, MAX_INT);
   for (t=0; t<=L->last_tag; t++)
     init_entry(L, t);
 }
 
 
-int lua_newtag (lua_State *L) {
-  ++L->last_tag;
-  luaM_growvector(L, L->IMtable, L->last_tag, 1, struct IM, arrEM, MAX_INT);
+LUA_API int lua_newtag (lua_State *L) {
+  luaM_growvector(L, L->TMtable, L->last_tag, 1, struct TM,
+                  "tag table overflow", MAX_INT);
+  L->nblocks += sizeof(struct TM);
+  L->last_tag++;
   init_entry(L, L->last_tag);
   return L->last_tag;
 }
@@ -83,76 +95,69 @@ int lua_newtag (lua_State *L) {
 
 static void checktag (lua_State *L, int tag) {
   if (!(0 <= tag && tag <= L->last_tag))
-    luaL_verror(L, "%d is not a valid tag", tag);
+    luaO_verror(L, "%d is not a valid tag", tag);
 }
 
 void luaT_realtag (lua_State *L, int tag) {
-  if (!(NUM_TAGS <= tag && tag <= L->last_tag))
-    luaL_verror(L, "tag %d was not created by `newtag'", tag);
+  if (!validtag(tag))
+    luaO_verror(L, "tag %d was not created by `newtag'", tag);
 }
 
 
-int lua_copytagmethods (lua_State *L, int tagto, int tagfrom) {
+LUA_API int lua_copytagmethods (lua_State *L, int tagto, int tagfrom) {
   int e;
   checktag(L, tagto);
   checktag(L, tagfrom);
-  for (e=0; e<IM_N; e++) {
+  for (e=0; e<TM_N; e++) {
     if (luaT_validevent(tagto, e))
-      *luaT_getim(L, tagto, e) = *luaT_getim(L, tagfrom, e);
+      luaT_gettm(L, tagto, e) = luaT_gettm(L, tagfrom, e);
   }
   return tagto;
 }
 
 
-int luaT_effectivetag (lua_State *L, const TObject *o) {
-  lua_Type t = ttype(o);
+int luaT_tag (const TObject *o) {
+  int t = ttype(o);
   switch (t) {
-    case TAG_USERDATA: {
-      int tag = o->value.ts->u.d.tag;
-      return (tag > L->last_tag) ? TAG_USERDATA : tag;  /* deprecated test */
-    }
-    case TAG_TABLE: return o->value.a->htag;
-    default: return t;
+    case LUA_TUSERDATA: return tsvalue(o)->u.d.tag;
+    case LUA_TTABLE:    return hvalue(o)->htag;
+    default:            return t;
   }
 }
 
 
-const TObject *luaT_gettagmethod (lua_State *L, int t, const char *event) {
+LUA_API void lua_gettagmethod (lua_State *L, int t, const char *event) {
   int e;
   e = luaI_checkevent(L, event, t);
   checktag(L, t);
-  if (luaT_validevent(t, e))
-    return luaT_getim(L, t,e);
+  if (luaT_validevent(t, e) && luaT_gettm(L, t, e)) {
+    clvalue(L->top) = luaT_gettm(L, t, e);
+    ttype(L->top) = LUA_TFUNCTION;
+  }
   else
-    return &luaO_nilobject;
+    ttype(L->top) = LUA_TNIL;
+  incr_top;
 }
 
 
-void luaT_settagmethod (lua_State *L, int t, const char *event, TObject *func) {
-  TObject temp;
-  int e;
-  e = luaI_checkevent(L, event, t);
+LUA_API void lua_settagmethod (lua_State *L, int t, const char *event) {
+  int e = luaI_checkevent(L, event, t);
   checktag(L, t);
   if (!luaT_validevent(t, e))
-    luaL_verror(L, "cannot change `%.20s' tag method for type `%.20s'%.20s",
+    luaO_verror(L, "cannot change `%.20s' tag method for type `%.20s'%.20s",
                 luaT_eventname[e], luaO_typenames[t],
-                (t == TAG_TABLE || t == TAG_USERDATA) ? " with default tag"
-                                                          : "");
-  temp = *func;
-  *func = *luaT_getim(L, t,e);
-  *luaT_getim(L, t, e) = temp;
-}
-
-
-const char *luaT_travtagmethods (lua_State *L,
-                         int (*fn)(lua_State *, TObject *)) {  /* ORDER IM */
-  int e;
-  for (e=IM_GETTABLE; e<=IM_FUNCTION; e++) {
-    int t;
-    for (t=0; t<=L->last_tag; t++)
-      if (fn(L, luaT_getim(L, t,e)))
-        return luaT_eventname[e];
+                (t == LUA_TTABLE || t == LUA_TUSERDATA) ?
+                   " with default tag" : "");
+  switch (ttype(L->top - 1)) {
+    case LUA_TNIL:
+      luaT_gettm(L, t, e) = NULL;
+      break;
+    case LUA_TFUNCTION:
+      luaT_gettm(L, t, e) = clvalue(L->top - 1);
+      break;
+    default:
+      lua_error(L, "tag method must be a function (or nil)");
   }
-  return NULL;
+  L->top--;
 }
 

ltm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ltm.h,v 1.11 2000/03/20 19:14:54 roberto Exp roberto $
+** $Id: ltm.h,v 1.17 2000/10/05 12:14:08 roberto Exp roberto $
 ** Tag methods
 ** See Copyright Notice in lua.h
 */
@@ -13,45 +13,46 @@
 
 /*
 * WARNING: if you change the order of this enumeration,
-* grep "ORDER IM"
+* grep "ORDER TM"
 */
 typedef enum {
-  IM_GETTABLE = 0,
-  IM_SETTABLE,
-  IM_INDEX,
-  IM_GETGLOBAL,
-  IM_SETGLOBAL,
-  IM_ADD,
-  IM_SUB,
-  IM_MUL,
-  IM_DIV,
-  IM_POW,
-  IM_UNM,
-  IM_LT,
-  IM_CONCAT,
-  IM_GC,
-  IM_FUNCTION,
-  IM_N		/* number of elements in the enum */
-} IMS;
+  TM_GETTABLE = 0,
+  TM_SETTABLE,
+  TM_INDEX,
+  TM_GETGLOBAL,
+  TM_SETGLOBAL,
+  TM_ADD,
+  TM_SUB,
+  TM_MUL,
+  TM_DIV,
+  TM_POW,
+  TM_UNM,
+  TM_LT,
+  TM_CONCAT,
+  TM_GC,
+  TM_FUNCTION,
+  TM_N		/* number of elements in the enum */
+} TMS;
 
 
-struct IM {
-  TObject int_method[IM_N];
+struct TM {
+  Closure *method[TM_N];
+  TString *collected;  /* list of garbage-collected udata with this tag */
 };
 
 
-#define luaT_getim(L,tag,event) (&L->IMtable[tag].int_method[event])
-#define luaT_getimbyObj(L,o,e)  (luaT_getim(L, luaT_effectivetag(L, o),(e)))
+#define luaT_gettm(L,tag,event) (L->TMtable[tag].method[event])
+#define luaT_gettmbyObj(L,o,e)  (luaT_gettm((L),luaT_tag(o),(e)))
+
+
+#define validtag(t) (NUM_TAGS <= (t) && (t) <= L->last_tag)
 
 extern const char *const luaT_eventname[];
 
 
 void luaT_init (lua_State *L);
 void luaT_realtag (lua_State *L, int tag);
-int luaT_effectivetag (lua_State *L, const TObject *o);
-void luaT_settagmethod (lua_State *L, int t, const char *event, TObject *func);
-const TObject *luaT_gettagmethod (lua_State *L, int t, const char *event);
-const char *luaT_travtagmethods (lua_State *L, int (*fn)(lua_State *, TObject *));
+int luaT_tag (const TObject *o);
 int luaT_validevent (int t, int e);  /* used by compatibility module */
 
 

lua.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.c,v 1.36 2000/03/30 17:19:48 roberto Exp roberto $
+** $Id: lua.c,v 1.54 2000/10/17 13:36:24 roberto Exp roberto $
 ** Lua stand-alone interpreter
 ** See Copyright Notice in lua.h
 */
@@ -11,10 +11,14 @@
 #include <string.h>
 
 #include "lua.h"
+
 #include "luadebug.h"
 #include "lualib.h"
 
 
+static lua_State *L = NULL;
+
+
 #ifndef PROMPT
 #define PROMPT		"> "
 #endif
@@ -25,6 +29,16 @@
 static int isatty (int x) { return x==0; }  /* assume stdin is a tty */
 #endif
 
+
+/*
+** global options
+*/
+struct Options {
+  int toclose;
+  int stacksize;
+};
+
+
 typedef void (*handler)(int);  /* type for signal actions */
 
 static void laction (int i);
@@ -34,16 +48,26 @@ static lua_Hook old_linehook = NULL;
 static lua_Hook old_callhook = NULL;
 
 
+static void userinit (void) {
+  lua_baselibopen(L);
+  lua_iolibopen(L);
+  lua_strlibopen(L);
+  lua_mathlibopen(L);
+  lua_dblibopen(L);
+  /* add your libraries here */
+}
+
+
 static handler lreset (void) {
   return signal(SIGINT, laction);
 }
 
 
 static void lstop (void) {
-  lua_setlinehook(lua_state, old_linehook);
-  lua_setcallhook(lua_state, old_callhook);
+  lua_setlinehook(L, old_linehook);
+  lua_setcallhook(L, old_callhook);
   lreset();
-  lua_error("interrupted!");
+  lua_error(L, "interrupted!");
 }
 
 
@@ -51,16 +75,24 @@ static void laction (int i) {
   (void)i;  /* to avoid warnings */
   signal(SIGINT, SIG_DFL); /* if another SIGINT happens before lstop,
                               terminate process (default action) */
-  old_linehook = lua_setlinehook(lua_state, (lua_Hook)lstop);
-  old_callhook = lua_setcallhook(lua_state, (lua_Hook)lstop);
+  old_linehook = lua_setlinehook(L, (lua_Hook)lstop);
+  old_callhook = lua_setcallhook(L, (lua_Hook)lstop);
 }
 
 
-static int ldo (int (*f)(lua_State *L, const char *), const char *name) {
+static int ldo (int (*f)(lua_State *l, const char *), const char *name) {
   int res;
   handler h = lreset();
-  res = f(lua_state, name);  /* dostring | dofile */
+  int top = lua_gettop(L);
+  res = f(L, name);  /* dostring | dofile */
+  lua_settop(L, top);  /* remove eventual results */
   signal(SIGINT, h);  /* restore old action */
+  /* Lua gives no message in such cases, so lua.c provides one */
+  if (res == LUA_ERRMEM) {
+    fprintf(stderr, "lua: memory allocation error\n");
+  }
+  else if (res == LUA_ERRERR)
+    fprintf(stderr, "lua: error in error message\n");
   return res;
 }
 
@@ -69,12 +101,12 @@ static void print_message (void) {
   fprintf(stderr,
   "usage: lua [options].  Available options are:\n"
   "  -        execute stdin as a file\n"
-  "  -d       turn debug on\n"
+  "  -c       close Lua when exiting\n"
   "  -e stat  execute string `stat'\n"
   "  -f name  execute file `name' with remaining arguments in table `arg'\n"
   "  -i       enter interactive mode with prompt\n"
   "  -q       enter interactive mode without prompt\n"
-  "  -sNUM    set stack size to NUM (must be first option)\n"
+  "  -sNUM    set stack size to NUM (must be the first option)\n"
   "  -v       print version information\n"
   "  a=b      set global `a' to string `b'\n"
   "  name     execute file `name'\n"
@@ -83,62 +115,73 @@ static void print_message (void) {
 
 
 static void print_version (void) {
-  printf("%s  %s\n", LUA_VERSION, LUA_COPYRIGHT);
+  printf("%.80s  %.80s\n", LUA_VERSION, LUA_COPYRIGHT);
 }
 
 
 static void assign (char *arg) {
   char *eq = strchr(arg, '=');
   *eq = '\0';  /* spilt `arg' in two strings (name & value) */
-  lua_pushstring(eq+1);
-  lua_setglobal(arg);
+  lua_pushstring(L, eq+1);
+  lua_setglobal(L, arg);
 }
 
 
-static lua_Object getargs (char *argv[]) {
-  lua_Object args = lua_createtable();
+static void getargs (char *argv[]) {
   int i;
+  lua_newtable(L);
   for (i=0; argv[i]; i++) {
     /* arg[i] = argv[i] */
-    lua_pushobject(args); lua_pushnumber(i);
-    lua_pushstring(argv[i]); lua_settable();
+    lua_pushnumber(L, i);
+    lua_pushstring(L, argv[i]);
+    lua_settable(L, -3);
   }
   /* arg.n = maximum index in table `arg' */
-  lua_pushobject(args); lua_pushstring("n");
-  lua_pushnumber(i-1); lua_settable();
-  return args;
+  lua_pushstring(L, "n");
+  lua_pushnumber(L, i-1);
+  lua_settable(L, -3);
 }
 
 
-static void l_getargs (void) {
-  char **argv = (char **)lua_getuserdata(lua_getparam(1));
-  lua_pushobject(getargs(argv));
+static int l_getargs (lua_State *l) {
+  char **argv = (char **)lua_touserdata(l, -1);
+  getargs(argv);
+  return 1;
 }
 
 
-static void file_input (const char *argv) {
+static int file_input (const char *argv) {
   int result = ldo(lua_dofile, argv);
   if (result) {
-    if (result == 2) {
+    if (result == LUA_ERRFILE) {
       fprintf(stderr, "lua: cannot execute file ");
       perror(argv);
     }
-    exit(1);
+    return EXIT_FAILURE;
   }
+  else
+    return EXIT_SUCCESS;
 }
 
 
+/* maximum length of an input string */
+#ifndef MAXINPUT
+#define MAXINPUT	BUFSIZ
+#endif
+
 static void manual_input (int version, int prompt) {
   int cont = 1;
   if (version) print_version();
   while (cont) {
-    char buffer[BUFSIZ];
+    char buffer[MAXINPUT];
     int i = 0;
-    lua_beginblock();
     if (prompt) {
-      const char *s = lua_getstring(lua_getglobal("_PROMPT"));
+      const char *s;
+      lua_getglobal(L, "_PROMPT");
+      s = lua_tostring(L, -1);
       if (!s) s = PROMPT;
       fputs(s, stdout);
+      lua_pop(L, 1);  /* remove global */
     }
     for(;;) {
       int c = getchar();
@@ -151,7 +194,7 @@ static void manual_input (int version, int prompt) {
           buffer[i-1] = '\n';
         else break;
       }
-      else if (i >= BUFSIZ-1) {
+      else if (i >= MAXINPUT-1) {
         fprintf(stderr, "lua: input line too long\n");
         break;
       }
@@ -159,96 +202,121 @@ static void manual_input (int version, int prompt) {
     }
     buffer[i] = '\0';
     ldo(lua_dostring, buffer);
-    lua_endblock();
+    lua_settop(L, 0);  /* remove eventual results */
   }
   printf("\n");
 }
 
 
-int main (int argc, char *argv[]) {
-  int i = 1;
-  if (i < argc && argv[1][0] == '-' && argv[1][1] == 's') {
-    int stacksize = atoi(&argv[1][2]);
-    if (stacksize == 0) {
-      fprintf(stderr, "lua: invalid stack size ('%s')\n", &argv[1][2]);
-      exit(1);
-    }
-    i++;
-    lua_state = lua_newstate("stack", stacksize, NULL);
-  }
-  else
-    lua_state = lua_newstate(NULL);
-  lua_userinit();
-  lua_pushuserdata(argv);
-  lua_pushcclosure(l_getargs, 1);
-  lua_setglobal("getargs");
-  if (i >= argc) {  /* no other arguments? */
+static int handle_argv (char *argv[], struct Options *opt) {
+  if (opt->stacksize > 0) argv++;  /* skip option `-s' (if present) */
+  if (*argv == NULL) {  /* no more arguments? */
     if (isatty(0)) {
       manual_input(1, 1);
     }
     else
       ldo(lua_dofile, NULL);  /* executes stdin as a file */
   }
-  else for (; i<argc; i++) {
-    if (argv[i][0] == '-') {  /* option? */
-      switch (argv[i][1]) {
-        case 0:
-          ldo(lua_dofile, NULL);  /* executes stdin as a file */
-          break;
-        case 'i':
-          manual_input(0, 1);
-          break;
-        case 'q':
-          manual_input(0, 0);
-          break;
-        case 'd':
-          lua_setdebug(lua_state, 1);
-          if (i+1 >= argc) {  /* last argument? */
-            manual_input(1, 1);
+  else {  /* other arguments; loop over them */
+    int i;
+    for (i = 0; argv[i] != NULL; i++) {
+      if (argv[i][0] != '-') {  /* not an option? */
+        if (strchr(argv[i], '='))
+          assign(argv[i]);
+        else
+          if (file_input(argv[i]) != EXIT_SUCCESS)
+            return EXIT_FAILURE;  /* stop if file fails */
+        }
+        else switch (argv[i][1]) {  /* option */
+          case 0: {
+            ldo(lua_dofile, NULL);  /* executes stdin as a file */
+            break;
           }
-          break;
-        case 'v':
-          print_version();
-          break;
-        case 'e':
-          i++;
-          if (i >= argc) {
+          case 'i': {
+            manual_input(0, 1);
+            break;
+          }
+          case 'q': {
+            manual_input(0, 0);
+            break;
+          }
+          case 'c': {
+            opt->toclose = 1;
+            break;
+          }
+          case 'v': {
+            print_version();
+            break;
+          }
+          case 'e': {
+            i++;
+            if (argv[i] == NULL) {
+              print_message();
+              return EXIT_FAILURE;
+            }
+            if (ldo(lua_dostring, argv[i]) != 0) {
+              fprintf(stderr, "lua: error running argument `%.99s'\n", argv[i]);
+              return EXIT_FAILURE;
+            }
+            break;
+          }
+          case 'f': {
+            i++;
+            if (argv[i] == NULL) {
+              print_message();
+              return EXIT_FAILURE;
+            }
+            getargs(argv+i);  /* collect remaining arguments */
+            lua_setglobal(L, "arg");
+            return file_input(argv[i]);  /* stop scanning arguments */
+          }
+          case 's': {
+            fprintf(stderr, "lua: stack size (`-s') must be the first option\n");
+            return EXIT_FAILURE;
+          }
+          default: {
             print_message();
-            exit(1);
+            return EXIT_FAILURE;
           }
-          if (ldo(lua_dostring, argv[i]) != 0) {
-            fprintf(stderr, "lua: error running argument `%s'\n", argv[i]);
-            exit(1);
-          }
-          break;
-        case 'f':
-          i++;
-          if (i >= argc) {
-            print_message();
-            exit(1);
-          }
-          lua_pushobject(getargs(argv+i));  /* collect remaining arguments */
-          lua_setglobal("arg");
-          file_input(argv[i]);
-          goto endloop;  /* stop scanning arguments */
-          break;
-        case 's':
-          fprintf(stderr, "lua: stack size (`-s') must be the first option\n");
-          exit(1);
-        default:
-          print_message();
-          exit(1);
-      }
+        }
     }
-    else if (strchr(argv[i], '='))
-      assign(argv[i]);
-    else
-      file_input(argv[i]);
   }
-  endloop:
-#ifdef DEBUG
-  lua_close();
-#endif
-  return 0;
+  return EXIT_SUCCESS;
+}
+
+
+static void getstacksize (int argc, char *argv[], struct Options *opt) {
+  if (argc >= 2 && argv[1][0] == '-' && argv[1][1] == 's') {
+    int stacksize = atoi(&argv[1][2]);
+    if (stacksize <= 0) {
+      fprintf(stderr, "lua: invalid stack size ('%.20s')\n", &argv[1][2]);
+      exit(EXIT_FAILURE);
+    }
+    opt->stacksize = stacksize;
+  }
+  else
+    opt->stacksize = 0;  /* no stack size */
+}
+
+
+static void register_getargs (char *argv[]) {
+  lua_pushuserdata(L, argv);
+  lua_pushcclosure(L, l_getargs, 1);
+  lua_setglobal(L, "getargs");
+}
+
+
+int main (int argc, char *argv[]) {
+  struct Options opt;
+  int status;
+  opt.toclose = 0;
+  getstacksize(argc, argv, &opt);  /* handle option `-s' */
+  L = lua_open(opt.stacksize);  /* create state */
+  userinit();  /* open libraries */
+  register_getargs(argv);  /* create `getargs' function */
+  status = handle_argv(argv+1, &opt);
+  if (opt.toclose)
+    lua_close(L);
+  return status;
 }
 

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.47 2000/04/14 17:48:20 roberto Exp roberto $
+** $Id: lua.h,v 1.78 2000/10/30 12:38:50 roberto Exp roberto $
 ** Lua - An Extensible Extension Language
 ** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
 ** e-mail: lua@tecgraf.puc-rio.br
@@ -11,106 +11,179 @@
 #ifndef lua_h
 #define lua_h
 
-#define LUA_VERSION	"Lua 4.0 (alpha)"
+
+/* definition of `size_t' */
+#include <stddef.h>
+
+
+/* mark for all API functions */
+#ifndef LUA_API
+#define LUA_API		extern
+#endif
+
+
+#define LUA_VERSION	"Lua 4.0"
 #define LUA_COPYRIGHT	"Copyright (C) 1994-2000 TeCGraf, PUC-Rio"
 #define LUA_AUTHORS 	"W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
 
 
+/* name of global variable with error handler */
+#define LUA_ERRORMESSAGE	"_ERRORMESSAGE"
+
+
+/* pre-defined references */
 #define LUA_NOREF	(-2)
 #define LUA_REFNIL	(-1)
+#define LUA_REFREGISTRY	0
 
+/* pre-defined tags */
 #define LUA_ANYTAG	(-1)
+#define LUA_NOTAG	(-2)
+
+
+/* option for multiple returns in lua_call */
+#define LUA_MULTRET	(-1)
+
+
+/* minimum stack available for a C function */
+#define LUA_MINSTACK	20
+
+
+/* error codes for lua_do* */
+#define LUA_ERRRUN	1
+#define LUA_ERRFILE	2
+#define LUA_ERRSYNTAX	3
+#define LUA_ERRMEM	4
+#define LUA_ERRERR	5
+
 
 typedef struct lua_State lua_State;
 
-typedef void (*lua_CFunction) (lua_State *L);
+typedef int (*lua_CFunction) (lua_State *L);
 
-typedef struct TObject *lua_Object;
+/*
+** types returned by `lua_type'
+*/
+#define LUA_TNONE	(-1)
 
-#define LUA_NOOBJECT	((lua_Object)0)
+#define LUA_TUSERDATA	0
+#define LUA_TNIL	1
+#define LUA_TNUMBER	2
+#define LUA_TSTRING	3
+#define LUA_TTABLE	4
+#define LUA_TFUNCTION	5
 
 
-lua_State     *lua_newstate (const char *s, ...);
-void           lua_close (lua_State *L);
 
-lua_Object     lua_settagmethod (lua_State *L, int tag, const char *event);
-                                                       /* In: new method */
-lua_Object     lua_gettagmethod (lua_State *L, int tag, const char *event);
-
-int            lua_newtag (lua_State *L);
-int            lua_copytagmethods (lua_State *L, int tagto, int tagfrom);
-void           lua_settag (lua_State *L, int tag); /* In: object */
-
-void           lua_error (lua_State *L, const char *s);
-int            lua_dofile (lua_State *L, const char *filename);
-                                                        /* Out: returns */
-int            lua_dostring (lua_State *L, const char *str);
-                                                        /* Out: returns */
-int            lua_dobuffer (lua_State *L, const char *buff, int size,
-                                         const char *name); /* Out: returns */
-int            lua_callfunction (lua_State *L, lua_Object f);
-					  /* In: parameters; Out: returns */
-
-void	       lua_beginblock (lua_State *L);
-void	       lua_endblock (lua_State *L);
-
-lua_Object     lua_lua2C (lua_State *L, int number);
-#define	       lua_getparam		lua_lua2C
-#define	       lua_getresult		lua_lua2C
-
-const char    *lua_type (lua_State *L, lua_Object obj);
-
-int            lua_isnil (lua_State *L, lua_Object obj);
-int            lua_istable (lua_State *L, lua_Object obj);
-int            lua_isuserdata (lua_State *L, lua_Object obj);
-int            lua_iscfunction (lua_State *L, lua_Object obj);
-int            lua_isnumber (lua_State *L, lua_Object obj);
-int            lua_isstring (lua_State *L, lua_Object obj);
-int            lua_isfunction (lua_State *L, lua_Object obj);
-
-int            lua_equal (lua_State *L, lua_Object o1, lua_Object o2);
-
-double         lua_getnumber (lua_State *L, lua_Object obj);
-const char    *lua_getstring (lua_State *L, lua_Object obj);
-long           lua_strlen (lua_State *L, lua_Object obj);
-lua_CFunction  lua_getcfunction (lua_State *L, lua_Object obj);
-void	      *lua_getuserdata (lua_State *L, lua_Object obj);
+/*
+** state manipulation
+*/
+LUA_API lua_State *lua_open (int stacksize);
+LUA_API void       lua_close (lua_State *L);
 
 
-void 	       lua_pushnil (lua_State *L);
-void           lua_pushnumber (lua_State *L, double n);
-void           lua_pushlstring (lua_State *L, const char *s, long len);
-void           lua_pushstring (lua_State *L, const char *s);
-void           lua_pushcclosure (lua_State *L, lua_CFunction fn, int n);
-void           lua_pushusertag (lua_State *L, void *u, int tag);
-void           lua_pushobject (lua_State *L, lua_Object obj);
+/*
+** basic stack manipulation
+*/
+LUA_API int   lua_gettop (lua_State *L);
+LUA_API void  lua_settop (lua_State *L, int index);
+LUA_API void  lua_pushvalue (lua_State *L, int index);
+LUA_API void  lua_remove (lua_State *L, int index);
+LUA_API void  lua_insert (lua_State *L, int index);
+LUA_API int   lua_stackspace (lua_State *L);
 
-lua_Object     lua_pop (lua_State *L);
 
-lua_Object     lua_getglobal (lua_State *L, const char *name);
-lua_Object     lua_rawgetglobal (lua_State *L, const char *name);
-void           lua_setglobal (lua_State *L, const char *name); /* In: value */
-void           lua_rawsetglobal (lua_State *L, const char *name);/* In: value */
+/*
+** access functions (stack -> C)
+*/
 
-void           lua_settable (lua_State *L); /* In: table, index, value */
-void           lua_rawsettable (lua_State *L); /* In: table, index, value */
-lua_Object     lua_gettable (lua_State *L); /* In: table, index */
-lua_Object     lua_rawgettable (lua_State *L); /* In: table, index */
+LUA_API int            lua_type (lua_State *L, int index);
+LUA_API const char    *lua_typename (lua_State *L, int t);
+LUA_API int            lua_isnumber (lua_State *L, int index);
+LUA_API int            lua_isstring (lua_State *L, int index);
+LUA_API int            lua_iscfunction (lua_State *L, int index);
+LUA_API int            lua_tag (lua_State *L, int index);
 
-int            lua_tag (lua_State *L, lua_Object obj);
+LUA_API int            lua_equal (lua_State *L, int index1, int index2);
+LUA_API int            lua_lessthan (lua_State *L, int index1, int index2);
 
-const char    *lua_nextvar (lua_State *L, const char *varname); /* Out: value */
-int            lua_next (lua_State *L, lua_Object o, int i);
-						/* Out: ref, value */ 
+LUA_API double         lua_tonumber (lua_State *L, int index);
+LUA_API const char    *lua_tostring (lua_State *L, int index);
+LUA_API size_t         lua_strlen (lua_State *L, int index);
+LUA_API lua_CFunction  lua_tocfunction (lua_State *L, int index);
+LUA_API void	      *lua_touserdata (lua_State *L, int index);
+LUA_API const void    *lua_topointer (lua_State *L, int index);
 
-int            lua_ref (lua_State *L, int lock); /* In: value */
-lua_Object     lua_getref (lua_State *L, int ref);
-void	       lua_unref (lua_State *L, int ref);
 
-lua_Object     lua_createtable (lua_State *L);
+/*
+** push functions (C -> stack)
+*/
+LUA_API void  lua_pushnil (lua_State *L);
+LUA_API void  lua_pushnumber (lua_State *L, double n);
+LUA_API void  lua_pushlstring (lua_State *L, const char *s, size_t len);
+LUA_API void  lua_pushstring (lua_State *L, const char *s);
+LUA_API void  lua_pushcclosure (lua_State *L, lua_CFunction fn, int n);
+LUA_API void  lua_pushusertag (lua_State *L, void *u, int tag);
 
-long	       lua_collectgarbage (lua_State *L, long limit);
 
+/*
+** get functions (Lua -> stack)
+*/
+LUA_API void  lua_getglobal (lua_State *L, const char *name);
+LUA_API void  lua_gettable (lua_State *L, int index);
+LUA_API void  lua_rawget (lua_State *L, int index);
+LUA_API void  lua_rawgeti (lua_State *L, int index, int n);
+LUA_API void  lua_getglobals (lua_State *L);
+LUA_API void  lua_gettagmethod (lua_State *L, int tag, const char *event);
+LUA_API int   lua_getref (lua_State *L, int ref);
+LUA_API void  lua_newtable (lua_State *L);
+
+
+/*
+** set functions (stack -> Lua)
+*/
+LUA_API void  lua_setglobal (lua_State *L, const char *name);
+LUA_API void  lua_settable (lua_State *L, int index);
+LUA_API void  lua_rawset (lua_State *L, int index);
+LUA_API void  lua_rawseti (lua_State *L, int index, int n);
+LUA_API void  lua_setglobals (lua_State *L);
+LUA_API void  lua_settagmethod (lua_State *L, int tag, const char *event);
+LUA_API int   lua_ref (lua_State *L, int lock);
+
+
+/*
+** "do" functions (run Lua code)
+*/
+LUA_API int   lua_call (lua_State *L, int nargs, int nresults);
+LUA_API void  lua_rawcall (lua_State *L, int nargs, int nresults);
+LUA_API int   lua_dofile (lua_State *L, const char *filename);
+LUA_API int   lua_dostring (lua_State *L, const char *str);
+LUA_API int   lua_dobuffer (lua_State *L, const char *buff, size_t size, const char *name);
+
+/*
+** Garbage-collection functions
+*/
+LUA_API int   lua_getgcthreshold (lua_State *L);
+LUA_API int   lua_getgccount (lua_State *L);
+LUA_API void  lua_setgcthreshold (lua_State *L, int newthreshold);
+
+/*
+** miscellaneous functions
+*/
+LUA_API int   lua_newtag (lua_State *L);
+LUA_API int   lua_copytagmethods (lua_State *L, int tagto, int tagfrom);
+LUA_API void  lua_settag (lua_State *L, int tag);
+
+LUA_API void  lua_error (lua_State *L, const char *s);
+
+LUA_API void  lua_unref (lua_State *L, int ref);
+
+LUA_API int   lua_next (lua_State *L, int index);
+LUA_API int   lua_getn (lua_State *L, int index);
+
+LUA_API void  lua_concat (lua_State *L, int n);
+
+LUA_API void *lua_newuserdata (lua_State *L, size_t size);
 
 
 /* 
@@ -119,107 +192,25 @@ long	       lua_collectgarbage (lua_State *L, long limit);
 ** ===============================================================
 */
 
-#ifdef LUA_REENTRANT
+#define lua_pop(L,n)		lua_settop(L, -(n)-1)
 
-#define lua_call(L,name)	lua_callfunction(L, lua_getglobal(L, name))
-#define lua_pushref(L,ref)	lua_pushobject(L, lua_getref(L, ref))
-#define lua_refobject(L,o,l)	(lua_pushobject(L, o), lua_ref(L, l))
 #define lua_register(L,n,f)	(lua_pushcfunction(L, f), lua_setglobal(L, n))
 #define lua_pushuserdata(L,u)	lua_pushusertag(L, u, 0)
 #define lua_pushcfunction(L,f)	lua_pushcclosure(L, f, 0)
 #define lua_clonetag(L,t)	lua_copytagmethods(L, lua_newtag(L), (t))
 
-#else
+#define lua_isfunction(L,n)	(lua_type(L,n) == LUA_TFUNCTION)
+#define lua_istable(L,n)	(lua_type(L,n) == LUA_TTABLE)
+#define lua_isuserdata(L,n)	(lua_type(L,n) == LUA_TUSERDATA)
+#define lua_isnil(L,n)		(lua_type(L,n) == LUA_TNIL)
+#define lua_isnull(L,n)		(lua_type(L,n) == LUA_TNONE)
 
-#define lua_call(name)		lua_callfunction(lua_getglobal(name))
-#define lua_pushref(ref)	lua_pushobject(lua_getref(ref))
-#define lua_refobject(o,l)	(lua_pushobject(o), lua_ref(l))
-#define lua_register(n,f)	(lua_pushcfunction(f), lua_setglobal(n))
-#define lua_pushuserdata(u)	lua_pushusertag(u, 0)
-#define lua_pushcfunction(f)	lua_pushcclosure(f, 0)
-#define lua_clonetag(t)		lua_copytagmethods(lua_newtag(), (t))
+#define lua_getregistry(L)	lua_getref(L, LUA_REFREGISTRY)
 
 #endif
 
 
 
-#ifndef LUA_REENTRANT
-/* 
-** ===============================================================
-** Macros for single-state use
-** ===============================================================
-*/
-
-extern lua_State *lua_state;
-
-#define lua_open()	((void)(lua_state?0:(lua_state=lua_newstate(0))))
-
-#define lua_close()		(lua_close)(lua_state)
-#define lua_settagmethod(tag,event)	(lua_settagmethod)(lua_state, tag,event)
-#define lua_gettagmethod(tag,event)	(lua_gettagmethod)(lua_state, tag,event)
-#define lua_newtag()		(lua_newtag)(lua_state)
-#define lua_copytagmethods(tagto,tagfrom)	\
-		(lua_copytagmethods)(lua_state, tagto,tagfrom)
-#define lua_settag(tag)		(lua_settag)(lua_state, tag)
-#define lua_error(s)		(lua_error)(lua_state, s)
-#define lua_dofile(filename)	(lua_dofile)(lua_state, filename)
-#define lua_dostring(str)	(lua_dostring)(lua_state, str)
-#define lua_callfunction(f)	(lua_callfunction)(lua_state, f)
-#define lua_beginblock()	(lua_beginblock)(lua_state)
-#define lua_endblock()		(lua_endblock)(lua_state)
-#define lua_lua2C(number)	(lua_lua2C)(lua_state, number)
-#define lua_type(obj)		(lua_type)(lua_state, obj)
-#define lua_isnil(obj)		(lua_isnil)(lua_state, obj)
-#define lua_istable(obj)	(lua_istable)(lua_state, obj)
-#define lua_isuserdata(obj)	(lua_isuserdata)(lua_state, obj)
-#define lua_iscfunction(obj)	(lua_iscfunction)(lua_state, obj)
-#define lua_isnumber(obj)	(lua_isnumber)(lua_state, obj)
-#define lua_isstring(obj)	(lua_isstring)(lua_state, obj)
-#define lua_isfunction(obj)	(lua_isfunction)(lua_state, obj)
-#define lua_equal(o1,o2)	(lua_equal)(lua_state, o1,o2)
-#define lua_getnumber(obj)	(lua_getnumber)(lua_state, obj)
-#define lua_getstring(obj)	(lua_getstring)(lua_state, obj)
-#define lua_strlen(obj)		(lua_strlen)(lua_state, obj)
-#define lua_getcfunction(obj)	(lua_getcfunction)(lua_state, obj)
-#define lua_getuserdata(obj)	(lua_getuserdata)(lua_state, obj)
-#define lua_pushnil()		(lua_pushnil)(lua_state)
-#define lua_pushnumber(n)	(lua_pushnumber)(lua_state, n)
-#define lua_pushlstring(s,len)	(lua_pushlstring)(lua_state, s,len)
-#define lua_pushstring(s)	(lua_pushstring)(lua_state, s)
-#define lua_pushusertag(u,tag)	(lua_pushusertag)(lua_state, u,tag)
-#define lua_pushobject(obj)	(lua_pushobject)(lua_state, obj)
-#define lua_pop()		(lua_pop)(lua_state)
-#define lua_getglobal(name)	(lua_getglobal)(lua_state, name)
-#define lua_rawgetglobal(name)	(lua_rawgetglobal)(lua_state, name)
-#define lua_setglobal(name)	(lua_setglobal)(lua_state, name)
-#define lua_rawsetglobal(name)	(lua_rawsetglobal)(lua_state, name)
-#define lua_settable()		(lua_settable)(lua_state)
-#define lua_rawsettable()	(lua_rawsettable)(lua_state)
-#define lua_gettable()		(lua_gettable)(lua_state)
-#define lua_rawgettable()	(lua_rawgettable)(lua_state)
-#define lua_tag(obj)		(lua_tag)(lua_state, obj)
-#define lua_nextvar(varname)	(lua_nextvar)(lua_state, varname)
-#define lua_next(o,i)		(lua_next)(lua_state, o,i)
-#define lua_ref(lock)		(lua_ref)(lua_state, lock)
-#define lua_getref(ref)		(lua_getref)(lua_state, ref)
-#define lua_unref(ref)		(lua_unref)(lua_state, ref)
-#define lua_createtable()	(lua_createtable)(lua_state)
-#define lua_collectgarbage(limit)	(lua_collectgarbage)(lua_state, limit)
-/*
-** the following typecast is a little dirty, but we know of no other
-** way to keep compatibility with old definition of `lua_CFunction'
-*/
-#define lua_pushcclosure(fn,n) \
-		(lua_pushcclosure)(lua_state, (lua_CFunction)(fn), n)
-
-#endif
-
-
-#endif
-
-
-
-
 /******************************************************************************
 * Copyright (C) 1994-2000 TeCGraf, PUC-Rio.  All rights reserved.
 * 
@@ -254,3 +245,4 @@ extern lua_State *lua_state;
 *
 * This implementation contains no third-party code.
 ******************************************************************************/
+

luadebug.h

@@ -1,5 +1,5 @@
 /*
-** $Id: luadebug.h,v 1.9 2000/01/19 12:00:45 roberto Exp roberto $
+** $Id: luadebug.h,v 1.16 2000/10/20 16:39:03 roberto Exp roberto $
 ** Debugging API
 ** See Copyright Notice in lua.h
 */
@@ -17,37 +17,29 @@ typedef struct lua_Localvar lua_Localvar;
 typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
 
 
-int lua_getstack (lua_State *L, int level, lua_Debug *ar);
-int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
-int lua_getlocal (lua_State *L, const lua_Debug *ar, lua_Localvar *v);
-int lua_setlocal (lua_State *L, const lua_Debug *ar, lua_Localvar *v);
+LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar);
+LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar);
+LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n);
+LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n);
 
-int lua_setdebug (lua_State *L, int debug);
-
-lua_Hook lua_setcallhook (lua_State *L, lua_Hook func);
-lua_Hook lua_setlinehook (lua_State *L, lua_Hook func);
+LUA_API lua_Hook lua_setcallhook (lua_State *L, lua_Hook func);
+LUA_API lua_Hook lua_setlinehook (lua_State *L, lua_Hook func);
 
 
+#define LUA_IDSIZE	60
 
 struct lua_Debug {
   const char *event;     /* `call', `return' */
-  const char *source;    /* (S) */
-  int linedefined;       /* (S) */
-  const char *what;      /* (S) `Lua' function, `C' function, Lua `main' */
   int currentline;       /* (l) */
   const char *name;      /* (n) */
-  const char *namewhat;  /* (n) global, tag method, local, field */
+  const char *namewhat;  /* (n) `global', `tag method', `local', `field' */
   int nups;              /* (u) number of upvalues */
-  lua_Object func;       /* (f) function being executed */
+  int linedefined;       /* (S) */
+  const char *what;      /* (S) `Lua' function, `C' function, Lua `main' */
+  const char *source;    /* (S) */
+  char short_src[LUA_IDSIZE]; /* (S) */
   /* private part */
-  lua_Object _func;  /* active function */
-};
-
-
-struct lua_Localvar {
-  int index;
-  const char *name;
-  lua_Object value;
+  struct lua_TObject *_func;  /* active function */
 };
 
 

lualib.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lualib.h,v 1.7 1999/08/16 20:52:00 roberto Exp roberto $
+** $Id: lualib.h,v 1.13 2000/10/20 16:39:03 roberto Exp roberto $
 ** Lua standard libraries
 ** See Copyright Notice in lua.h
 */
@@ -10,32 +10,21 @@
 
 #include "lua.h"
 
-void lua_iolibopen (lua_State *L);
-void lua_strlibopen (lua_State *L);
-void lua_mathlibopen (lua_State *L);
-void lua_dblibopen (lua_State *L);
-
-
-void lua_userinit (lua_State *L);
-
-
-/* 
-** ===============================================================
-** Macros for single-state use
-** ===============================================================
-*/
-
-#ifndef LUA_REENTRANT
-
-#define lua_iolibopen()		(lua_iolibopen)(lua_state)
-#define lua_strlibopen()	(lua_strlibopen)(lua_state)
-#define lua_mathlibopen()	(lua_mathlibopen)(lua_state)
-#define lua_dblibopen()		(lua_dblibopen)(lua_state)
-#define lua_userinit()		(lua_userinit)(lua_state)
 
+#ifndef LUALIB_API
+#define LUALIB_API	extern
 #endif
 
 
+#define LUA_ALERT               "_ALERT"
+
+LUALIB_API void lua_baselibopen (lua_State *L);
+LUALIB_API void lua_iolibopen (lua_State *L);
+LUALIB_API void lua_strlibopen (lua_State *L);
+LUALIB_API void lua_mathlibopen (lua_State *L);
+LUALIB_API void lua_dblibopen (lua_State *L);
+
+
 
 /* Auxiliary functions (private) */
 

lundump.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.c,v 1.28 2000/04/24 19:32:58 lhf Exp $
+** $Id: lundump.c,v 1.33 2000/10/31 16:57:23 lhf Exp $
 ** load bytecodes from files
 ** See Copyright Notice in lua.h
 */
@@ -7,19 +7,15 @@
 #include <stdio.h>
 #include <string.h>
 
-#define LUA_REENTRANT
-
-#include "lauxlib.h"
 #include "lfunc.h"
 #include "lmem.h"
 #include "lopcodes.h"
 #include "lstring.h"
 #include "lundump.h"
 
-#define	LoadBlock(L,b,size,Z)	ezread(L,Z,b,size)
 #define	LoadByte		ezgetc
 
-static const char* ZNAME(ZIO* Z)
+static const char* ZNAME (ZIO* Z)
 {
  const char* s=zname(Z);
  return (*s=='@') ? s+1 : s;
@@ -27,7 +23,7 @@ static const char* ZNAME(ZIO* Z)
 
 static void unexpectedEOZ (lua_State* L, ZIO* Z)
 {
- luaL_verror(L,"unexpected end of file in `%.255s'",ZNAME(Z));
+ luaO_verror(L,"unexpected end of file in `%.99s'",ZNAME(Z));
 }
 
 static int ezgetc (lua_State* L, ZIO* Z)
@@ -43,152 +39,129 @@ static void ezread (lua_State* L, ZIO* Z, void* b, int n)
  if (r!=0) unexpectedEOZ(L,Z);
 }
 
-static unsigned int LoadWord (lua_State* L, ZIO* Z)
+static void LoadBlock (lua_State* L, void* b, size_t size, ZIO* Z, int swap)
 {
- unsigned int hi=ezgetc(L,Z);
- unsigned int lo=ezgetc(L,Z);
- return (hi<<8)|lo;
+ if (swap)
+ {
+  char *p=(char *) b+size-1;
+  int n=size;
+  while (n--) *p--=(char)ezgetc(L,Z);
+ }
+ else
+  ezread(L,Z,b,size);
 }
 
-static unsigned long LoadLong (lua_State* L, ZIO* Z)
+static void LoadVector (lua_State* L, void* b, int m, size_t size, ZIO* Z, int swap)
 {
- unsigned long hi=LoadWord(L,Z);
- unsigned long lo=LoadWord(L,Z);
- return (hi<<16)|lo;
+ if (swap)
+ {
+  char *q=(char *) b;
+  while (m--)
+  {
+   char *p=q+size-1;
+   int n=size;
+   while (n--) *p--=(char)ezgetc(L,Z);
+   q+=size;
+  }
+ }
+ else
+  ezread(L,Z,b,m*size);
 }
 
-static Number LoadNumber (lua_State* L, ZIO* Z)
+static int LoadInt (lua_State* L, ZIO* Z, int swap)
 {
- char b[256];
- int size=ezgetc(L,Z);
- LoadBlock(L,b,size,Z);
- b[size]=0;
- return luaU_str2d(L,b,ZNAME(Z));
+ int x;
+ LoadBlock(L,&x,sizeof(x),Z,swap);
+ return x;
 }
 
-static int LoadInt (lua_State* L, ZIO* Z, const char* message)
+static size_t LoadSize (lua_State* L, ZIO* Z, int swap)
 {
- unsigned long l=LoadLong(L,Z);
- unsigned int i=l;
- if (i!=l) luaL_verror(L,"%s in `%.255s';\n"
-		"  read %lu; expected %u",message,ZNAME(Z),l,-1);
- return i;
+ size_t x;
+ LoadBlock(L,&x,sizeof(x),Z,swap);
+ return x;
 }
 
-static TString* LoadString (lua_State* L, ZIO* Z)
+static Number LoadNumber (lua_State* L, ZIO* Z, int swap)
 {
- long size=LoadLong(L,Z);
+ Number x;
+ LoadBlock(L,&x,sizeof(x),Z,swap);
+ return x;
+}
+
+static TString* LoadString (lua_State* L, ZIO* Z, int swap)
+{
+ size_t size=LoadSize(L,Z,swap);
  if (size==0)
   return NULL;
  else
  {
-  char* s=luaL_openspace(L,size);
-  LoadBlock(L,s,size,Z);
+  char* s=luaO_openspace(L,size);
+  LoadBlock(L,s,size,Z,0);
   return luaS_newlstr(L,s,size-1);	/* remove trailing '\0' */
  }
 }
 
-static void SwapCode (lua_State* L, Instruction* code, int size, ZIO* Z)
+static void LoadCode (lua_State* L, Proto* tf, ZIO* Z, int swap)
 {
- unsigned char* p;
- int c;
- if (sizeof(Instruction)==4)
-  while (size--)
-  {
-   p=(unsigned char *) code++;
-   c=p[0]; p[0]=p[3]; p[3]=c;
-   c=p[1]; p[1]=p[2]; p[2]=c;
-  }
- else if (sizeof(Instruction)==2)
-  while (size--)
-  {
-   p=(unsigned char *) code++;
-   c=p[0]; p[0]=p[1]; p[1]=c;
-  }
- else
-  luaL_verror(L,"cannot swap code with %d-byte instructions in `%.255s'",
-	(int)sizeof(Instruction),ZNAME(Z));
-}
-
-static void LoadCode (lua_State* L, Proto* tf, ZIO* Z)
-{
- int size=LoadInt(L,Z,"code too long");
- Instruction t=0,tt=TEST_CODE;
+ int size=LoadInt(L,Z,swap);
  tf->code=luaM_newvector(L,size,Instruction);
- LoadBlock(L,tf->code,size*sizeof(*tf->code),Z);
- if (tf->code[size-1]!=OP_END) luaL_verror(L,"bad code in `%.255s'",ZNAME(Z));
- LoadBlock(L,&t,sizeof(t),Z);
- if (t!=tt)
- {
-  Instruction ot=t;
-  SwapCode(L,&t,1,Z);
-  if (t!=tt) luaL_verror(L,"cannot swap code in `%.255s';\n"
-	"  read 0x%08X; swapped to 0x%08X; expected 0x%08X",
-	ZNAME(Z),(unsigned long)ot,(unsigned long)t,(unsigned long)tt);
-  SwapCode(L,tf->code,size,Z);
- }
+ LoadVector(L,tf->code,size,sizeof(*tf->code),Z,swap);
+ if (tf->code[size-1]!=OP_END) luaO_verror(L,"bad code in `%.99s'",ZNAME(Z));
+ luaF_protook(L,tf,size);
 }
 
-static void LoadLocals (lua_State* L, Proto* tf, ZIO* Z)
-{
- int i,n=LoadInt(L,Z,"too many locals");
- if (n==0) return;
- tf->locvars=luaM_newvector(L,n+1,LocVar);
- for (i=0; i<n; i++)
- {
-  tf->locvars[i].line=LoadInt(L,Z,"too many lines");
-  tf->locvars[i].varname=LoadString(L,Z);
- }
- tf->locvars[i].line=-1;		/* flag end of vector */
- tf->locvars[i].varname=NULL;
-}
-
-static Proto* LoadFunction (lua_State* L, ZIO* Z, int native);
-
-static void LoadConstants (lua_State* L, Proto* tf, ZIO* Z, int native)
+static void LoadLocals (lua_State* L, Proto* tf, ZIO* Z, int swap)
 {
  int i,n;
- tf->nkstr=n=LoadInt(L,Z,"too many strings");
- if (n>0)
+ tf->nlocvars=n=LoadInt(L,Z,swap);
+ tf->locvars=luaM_newvector(L,n,LocVar);
+ for (i=0; i<n; i++)
  {
-  tf->kstr=luaM_newvector(L,n,TString*);
-  for (i=0; i<n; i++)
-  {
-   TString* s=LoadString(L,Z);
-   int isglobal=LoadByte(L,Z);
-   if (isglobal) luaS_assertglobal(L,s);
-   tf->kstr[i]=s;
-  }
- }
- tf->nknum=n=LoadInt(L,Z,"too many numbers");
- if (n>0)
- {
-  tf->knum=luaM_newvector(L,n,Number);
-  if (native)
-   LoadBlock(L,tf->knum,n*sizeof(*tf->knum),Z);
-  else
-   for (i=0; i<n; i++) tf->knum[i]=LoadNumber(L,Z);
- }
- tf->nkproto=n=LoadInt(L,Z,"too many functions");
- if (n>0)
- {
-  tf->kproto=luaM_newvector(L,n,Proto*);
-  for (i=0; i<n; i++) tf->kproto[i]=LoadFunction(L,Z,native);
+  tf->locvars[i].varname=LoadString(L,Z,swap);
+  tf->locvars[i].startpc=LoadInt(L,Z,swap);
+  tf->locvars[i].endpc=LoadInt(L,Z,swap);
  }
 }
 
-static Proto* LoadFunction (lua_State* L, ZIO* Z, int native)
+static void LoadLines (lua_State* L, Proto* tf, ZIO* Z, int swap)
+{
+ int n;
+ tf->nlineinfo=n=LoadInt(L,Z,swap);
+ tf->lineinfo=luaM_newvector(L,n,int);
+ LoadVector(L,tf->lineinfo,n,sizeof(*tf->lineinfo),Z,swap);
+}
+
+static Proto* LoadFunction (lua_State* L, ZIO* Z, int swap);
+
+static void LoadConstants (lua_State* L, Proto* tf, ZIO* Z, int swap)
+{
+ int i,n;
+ tf->nkstr=n=LoadInt(L,Z,swap);
+ tf->kstr=luaM_newvector(L,n,TString*);
+ for (i=0; i<n; i++)
+  tf->kstr[i]=LoadString(L,Z,swap);
+ tf->nknum=n=LoadInt(L,Z,swap);
+ tf->knum=luaM_newvector(L,n,Number);
+ LoadVector(L,tf->knum,n,sizeof(*tf->knum),Z,swap);
+ tf->nkproto=n=LoadInt(L,Z,swap);
+ tf->kproto=luaM_newvector(L,n,Proto*);
+ for (i=0; i<n; i++)
+  tf->kproto[i]=LoadFunction(L,Z,swap);
+}
+
+static Proto* LoadFunction (lua_State* L, ZIO* Z, int swap)
 {
  Proto* tf=luaF_newproto(L);
- tf->source=LoadString(L,Z);
- if (tf->source==NULL) tf->source=luaS_new(L,zname(Z));
- tf->lineDefined=LoadInt(L,Z,"lineDefined too large");
- tf->numparams=LoadInt(L,Z,"too many parameters");
+ tf->source=LoadString(L,Z,swap);
+ tf->lineDefined=LoadInt(L,Z,swap);
+ tf->numparams=LoadInt(L,Z,swap);
  tf->is_vararg=LoadByte(L,Z);
- tf->maxstacksize=LoadInt(L,Z,"too much stack needed");
- LoadCode(L,tf,Z);
- LoadLocals(L,tf,Z);
- LoadConstants(L,tf,Z,native);
+ tf->maxstacksize=LoadInt(L,Z,swap);
+ LoadLocals(L,tf,Z,swap);
+ LoadLines(L,tf,Z,swap);
+ LoadConstants(L,tf,Z,swap);
+ LoadCode(L,tf,Z,swap);
  return tf;
 }
 
@@ -197,54 +170,47 @@ static void LoadSignature (lua_State* L, ZIO* Z)
  const char* s=SIGNATURE;
  while (*s!=0 && ezgetc(L,Z)==*s)
   ++s;
- if (*s!=0) luaL_verror(L,"bad signature in `%.255s'",ZNAME(Z));
+ if (*s!=0) luaO_verror(L,"bad signature in `%.99s'",ZNAME(Z));
 }
 
+static void TestSize (lua_State* L, int s, const char* what, ZIO* Z)
+{
+ int r=ezgetc(L,Z);
+ if (r!=s)
+  luaO_verror(L,"virtual machine mismatch in `%.99s':\n"
+	"  %.20s is %d but read %d",ZNAME(Z),what,s,r);
+}
+
+#define TESTSIZE(s)	TestSize(L,s,#s,Z)
 #define V(v)	v/16,v%16
 
 static int LoadHeader (lua_State* L, ZIO* Z)
 {
- int version,sizeofR,native;
+ int version,swap;
+ Number f=0,tf=TEST_NUMBER;
  LoadSignature(L,Z);
  version=ezgetc(L,Z);
  if (version>VERSION)
-  luaL_verror(L,"`%.255s' too new:\n"
+  luaO_verror(L,"`%.99s' too new:\n"
 	"  read version %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:\n"
+  luaO_verror(L,"`%.99s' too old:\n"
 	"  read version %d.%d; expected at least %d.%d",
 	ZNAME(Z),V(version),V(VERSION));
- {
-  int I=ezgetc(L,Z);
-  int i=ezgetc(L,Z);
-  int op=ezgetc(L,Z);
-  int b=ezgetc(L,Z);
-  if (I!=sizeof(Instruction) || i!=SIZE_INSTRUCTION || op!=SIZE_OP || b!=SIZE_B)
-   luaL_verror(L,"virtual machine mismatch in `%.255s':\n"
-   	"  read %d-bit,%d-byte instructions, %d-bit opcodes, %d-bit b-arguments;\n"
-   	"  expected %d-bit,%d-byte instructions, %d-bit opcodes, %d-bit b-arguments",
-	ZNAME(Z),i,I,op,b,SIZE_INSTRUCTION,(int)sizeof(Instruction),SIZE_OP,SIZE_B);
- }
- sizeofR=ezgetc(L,Z);
- native=(sizeofR!=0);
- if (native)				/* test number representation */
- {
-  if (sizeofR!=sizeof(Number))
-   luaL_verror(L,"native number size mismatch in `%.255s':\n"
-	"  read %d; expected %d",
-	ZNAME(Z),sizeofR,(int)sizeof(Number));
-  else
-  {
-   Number 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':\n"
-	"  read " NUMBER_FMT "; expected " NUMBER_FMT,
-	ZNAME(Z),f,tf);
-  }
- }
- return native;
+ swap=(luaU_endianess()!=ezgetc(L,Z));	/* need to swap bytes? */
+ TESTSIZE(sizeof(int));
+ TESTSIZE(sizeof(size_t));
+ TESTSIZE(sizeof(Instruction));
+ TESTSIZE(SIZE_INSTRUCTION);
+ TESTSIZE(SIZE_OP);
+ TESTSIZE(SIZE_B);
+ TESTSIZE(sizeof(Number));
+ f=LoadNumber(L,Z,swap);
+ if ((long)f!=(long)tf)		/* disregard errors in last bit of fraction */
+  luaO_verror(L,"unknown number format in `%.99s':\n"
+      "  read " NUMBER_FMT "; expected " NUMBER_FMT, ZNAME(Z),f,tf);
+ return swap;
 }
 
 static Proto* LoadChunk (lua_State* L, ZIO* Z)
@@ -256,23 +222,23 @@ static Proto* LoadChunk (lua_State* L, ZIO* Z)
 ** load one chunk from a file or buffer
 ** return main if ok and NULL at EOF
 */
-Proto* luaU_undump1 (lua_State* L, ZIO* Z)
+Proto* luaU_undump (lua_State* L, ZIO* Z)
 {
+ Proto* tf=NULL;
  int c=zgetc(Z);
  if (c==ID_CHUNK)
-  return LoadChunk(L,Z);
- else if (c!=EOZ)
-  luaL_verror(L,"`%.255s' is not a Lua binary file",ZNAME(Z));
- return NULL;
+  tf=LoadChunk(L,Z);
+ c=zgetc(Z);
+ if (c!=EOZ)
+  luaO_verror(L,"`%.99s' apparently contains more than one chunk",ZNAME(Z));
+ return tf;
 }
 
 /*
-* convert number from text
+** find byte order
 */
-double luaU_str2d (lua_State* L, const char* b, const char* where)
+int luaU_endianess (void)
 {
- double x;
- if (!luaO_str2d(b,&x))
-  luaL_verror(L,"cannot convert number `%.255s' in `%.255s'",b,where);
- return x;
+ int x=1;
+ return *(char*)&x;
 }

lundump.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.19 2000/04/24 17:32:29 lhf Exp $
+** $Id: lundump.h,v 1.21 2000/10/31 16:57:23 lhf Exp $
 ** load pre-compiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -11,10 +11,10 @@
 #include "lzio.h"
 
 /* load one chunk */
-Proto* luaU_undump1 (lua_State* L, ZIO* Z);
+Proto* luaU_undump (lua_State* L, ZIO* Z);
 
-/* convert number from text */
-double luaU_str2d (lua_State* L, const char* b, const char* where);
+/* find byte order */
+int luaU_endianess (void);
 
 /* definitions for headers of binary files */
 #define	VERSION		0x40		/* last format change was in 4.0 */
@@ -23,21 +23,13 @@ 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
-
-/* format for numbers in listings and error messages */
-#ifndef NUMBER_FMT
-#define NUMBER_FMT	"%.16g"		/* LUA_NUMBER */
-#endif
+#define SOURCE_FMT	"<%d:%.99s>"
+#define SOURCE		tf->lineDefined,tf->source->str
+#define IN_FMT		" in %p " SOURCE_FMT
+#define IN		tf,SOURCE
 
 /* a multiple of PI for testing native format */
 /* multiplying by 1E8 gives non-trivial integer values */
 #define	TEST_NUMBER	3.14159265358979323846E8
 
-/* something for testing byte order in instructions */
-#define	TEST_CODE	0x01020304
-
 #endif

lvm.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lvm.h,v 1.20 2000/03/29 20:19:20 roberto Exp roberto $
+** $Id: lvm.h,v 1.26 2000/09/05 19:33:32 roberto Exp roberto $
 ** Lua virtual machine
 ** See Copyright Notice in lua.h
 */
@@ -13,22 +13,20 @@
 #include "ltm.h"
 
 
-#define tonumber(o)   ((ttype(o) != TAG_NUMBER) && (luaV_tonumber(o) != 0))
-#define tostring(L,o) ((ttype(o) != TAG_STRING) && (luaV_tostring(L, o) != 0))
+#define tonumber(o)   ((ttype(o) != LUA_TNUMBER) && (luaV_tonumber(o) != 0))
+#define tostring(L,o) ((ttype(o) != LUA_TSTRING) && (luaV_tostring(L, o) != 0))
 
 
-void luaV_pack (lua_State *L, StkId firstel, int nvararg, TObject *tab);
 int luaV_tonumber (TObject *obj);
 int luaV_tostring (lua_State *L, TObject *obj);
-void luaV_setn (lua_State *L, Hash *t, int val);
-void luaV_gettable (lua_State *L, StkId top);
-void luaV_settable (lua_State *L, StkId t, StkId top);
-void luaV_rawsettable (lua_State *L, StkId t);
-void luaV_getglobal (lua_State *L, GlobalVar *gv, StkId top);
-void luaV_setglobal (lua_State *L, GlobalVar *gv, StkId top);
+const TObject *luaV_gettable (lua_State *L, StkId t);
+void luaV_settable (lua_State *L, StkId t, StkId key);
+const TObject *luaV_getglobal (lua_State *L, TString *s);
+void luaV_setglobal (lua_State *L, TString *s);
 StkId luaV_execute (lua_State *L, const Closure *cl, StkId base);
 void luaV_Cclosure (lua_State *L, lua_CFunction c, int nelems);
 void luaV_Lclosure (lua_State *L, Proto *l, int nelems);
 int luaV_lessthan (lua_State *L, const TObject *l, const TObject *r, StkId top);
+void luaV_strconc (lua_State *L, int total, StkId top);
 
 #endif

lzio.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.c,v 1.10 2000/02/08 16:39:42 roberto Exp roberto $
+** $Id: lzio.c,v 1.12 2000/05/24 13:54:49 roberto Exp roberto $
 ** a generic input stream interface
 ** See Copyright Notice in lua.h
 */
@@ -9,6 +9,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include "lua.h"
+
 #include "lzio.h"
 
 
@@ -21,7 +23,7 @@ static int zmfilbuf (ZIO* z) {
 }
 
 
-ZIO* zmopen (ZIO* z, const char* b, int size, const char *name) {
+ZIO* zmopen (ZIO* z, const char* b, size_t size, const char *name) {
   if (b==NULL) return NULL;
   z->n = size;
   z->p = (const unsigned char *)b;
@@ -41,7 +43,7 @@ ZIO* zsopen (ZIO* z, const char* s, const char *name) {
 /* -------------------------------------------------------------- FILEs --- */
 
 static int zffilbuf (ZIO* z) {
-  int n;
+  size_t n;
   if (feof((FILE *)z->u)) return EOZ;
   n = fread(z->buffer, 1, ZBSIZE, (FILE *)z->u);
   if (n==0) return EOZ;
@@ -63,9 +65,9 @@ ZIO* zFopen (ZIO* z, FILE* f, const char *name) {
 
 
 /* --------------------------------------------------------------- read --- */
-int zread (ZIO *z, void *b, int n) {
+size_t zread (ZIO *z, void *b, size_t n) {
   while (n) {
-    int m;
+    size_t m;
     if (z->n == 0) {
       if (z->filbuf(z) == EOZ)
         return n;  /* return number of missing bytes */

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.4 1998/01/09 14:57:43 roberto Exp roberto $
+** $Id: lzio.h,v 1.6 2000/05/24 13:54:49 roberto Exp roberto $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -24,21 +24,24 @@ typedef struct zio ZIO;
 
 ZIO* zFopen (ZIO* z, FILE* f, const char *name);	/* open FILEs */
 ZIO* zsopen (ZIO* z, const char* s, const char *name);	/* string */
-ZIO* zmopen (ZIO* z, const char* b, int size, const char *name);  /* memory */
+ZIO* zmopen (ZIO* z, const char* b, size_t size, const char *name); /* memory */
 
-int zread (ZIO* z, void* b, int n);	/* read next n bytes */
+size_t zread (ZIO* z, void* b, size_t n);	/* read next n bytes */
 
-#define zgetc(z)	(--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
+#define zgetc(z)	(((z)->n--)>0 ? ((int)*(z)->p++): (z)->filbuf(z))
 #define zungetc(z)	(++(z)->n,--(z)->p)
 #define zname(z)	((z)->name)
 
 
+
 /* --------- Private Part ------------------ */
 
+#ifndef ZBSIZE
 #define ZBSIZE	256			/* buffer size */
+#endif
 
 struct zio {
-  int n;				/* bytes still unread */
+  size_t n;				/* bytes still unread */
   const unsigned char* p;		/* current position in buffer */
   int (*filbuf)(ZIO* z);
   void* u;				/* additional data */

makefile

@@ -1,5 +1,5 @@
 #
-## $Id: makefile,v 1.24 2000/04/14 17:52:09 roberto Exp roberto $
+## $Id: makefile,v 1.29 2000/10/30 17:50:00 roberto Exp roberto $
 ## Makefile
 ## See Copyright Notice in lua.h
 #
@@ -17,17 +17,32 @@
 #
 # define LUA_NUM_TYPE if you need numbers to be different from double
 # (for instance, -DLUA_NUM_TYPE=float)
+# you may need to adapat the code, too.
 #
 # define LUA_COMPAT_READPATTERN if you need read patterns
 # (only for compatibility with previous versions)
+# define LUA_COMPAT_ARGRET for compatibility in the way function results
+# are passed as arguments 
+# define LUA_DEPRECATEDFUNCS to include obsolete functions
 
 CONFIG = -DPOPEN -D_POSIX_SOURCE
-#CONFIG = -DOLD_ANSI -DDEBUG -DLUA_COMPAT_READPATTERN
+#CONFIG = -DOLD_ANSI -DLUA_DEBUG -DLUA_COMPAT_READPATTERN -DLUA_COMPAT_ARGRET
+# -DLUA_DEPRECATEDFUNCS
 
 
 # Compilation parameters
 CC = gcc
-CWARNS = -Wall -W -Wmissing-prototypes -Wshadow -pedantic -Wpointer-arith -Wcast-align -Waggregate-return -Wcast-qual -Wnested-externs -Wwrite-strings
+CWARNS = -Wall -W -pedantic \
+	-Waggregate-return \
+	-Wcast-align \
+	-Wmissing-prototypes \
+	-Wnested-externs \
+	-Wpointer-arith \
+	-Wshadow \
+	-Wwrite-strings
+#	-Wcast-qual
+#	-Wtraditional
+
 CFLAGS = $(CONFIG) $(CWARNS) -ansi -O2
 
 
@@ -42,10 +57,7 @@ ARFLAGS	= rvl
 # Aplication modules
 LUAOBJS = \
 	lstate.o \
-	lref.o \
 	lapi.o \
-	lauxlib.o \
-	lbuiltin.o \
 	lmem.o \
 	lstring.o \
 	ltable.o \
@@ -53,7 +65,6 @@ LUAOBJS = \
 	lvm.o \
 	ldo.o \
 	lobject.o \
-	lbuffer.o \
 	lfunc.o \
 	lgc.o \
 	lcode.o \
@@ -65,11 +76,12 @@ LUAOBJS = \
 	ltests.o
 
 LIBOBJS = 	\
+	lauxlib.o \
+	lbaselib.o \
 	liolib.o \
 	lmathlib.o \
 	lstrlib.o \
-	ldblib.o \
-	linit.o
+	ldblib.o
 
 
 lua : lua.o liblua.a liblualib.a
@@ -99,56 +111,50 @@ clear	:
 	co $(CO_OPTIONS) $@
 
 
-lapi.o: lapi.c lapi.h lobject.h llimits.h lua.h lauxlib.h ldo.h \
- lstate.h luadebug.h lfunc.h lgc.h lmem.h lref.h lstring.h ltable.h \
- ltm.h lvm.h
-lauxlib.o: lauxlib.c lauxlib.h lua.h luadebug.h
-lbuffer.o: lbuffer.c lauxlib.h lua.h lmem.h lstate.h lobject.h \
- llimits.h luadebug.h
-lbuiltin.o: lbuiltin.c lapi.h lobject.h llimits.h lua.h lauxlib.h \
- lbuiltin.h ldo.h lstate.h luadebug.h lfunc.h lmem.h lstring.h \
- ltable.h ltm.h lundump.h lzio.h lvm.h
-lcode.o: lcode.c /usr/include/stdlib.h lcode.h llex.h lobject.h \
- llimits.h lua.h lzio.h lopcodes.h lparser.h ldo.h lstate.h luadebug.h \
- lmem.h lstring.h
-ldblib.o: ldblib.c lauxlib.h lua.h luadebug.h lualib.h
-ldebug.o: ldebug.c lapi.h lobject.h llimits.h lua.h lauxlib.h ldebug.h \
- luadebug.h ldo.h lstate.h lfunc.h ltable.h ltm.h
-ldo.o: ldo.c lauxlib.h lua.h ldebug.h lobject.h llimits.h luadebug.h \
- ldo.h lstate.h lgc.h lmem.h lparser.h lzio.h lstring.h ltm.h \
+lapi.o: lapi.c lua.h lapi.h lobject.h llimits.h ldo.h lstate.h \
+ luadebug.h lfunc.h lgc.h lmem.h lstring.h ltable.h ltm.h lvm.h
+lauxlib.o: lauxlib.c lua.h lauxlib.h luadebug.h
+lbaselib.o: lbaselib.c lua.h lauxlib.h luadebug.h lualib.h
+lcode.o: lcode.c /usr/include/stdlib.h lua.h lcode.h llex.h lobject.h \
+ llimits.h lzio.h lopcodes.h lparser.h ldo.h lstate.h luadebug.h \
+ lmem.h
+ldblib.o: ldblib.c lua.h lauxlib.h luadebug.h lualib.h
+ldebug.o: ldebug.c lua.h lapi.h lobject.h llimits.h lcode.h llex.h \
+ lzio.h lopcodes.h lparser.h ldebug.h lstate.h luadebug.h ldo.h \
+ lfunc.h lstring.h ltable.h ltm.h
+ldo.o: ldo.c lua.h ldebug.h lstate.h lobject.h llimits.h luadebug.h \
+ ldo.h lgc.h lmem.h lparser.h lzio.h lstring.h ltable.h ltm.h \
  lundump.h lvm.h
-lfunc.o: lfunc.c lfunc.h lobject.h llimits.h lua.h lmem.h lstate.h \
+lfunc.o: lfunc.c lua.h lfunc.h lobject.h llimits.h lmem.h lstate.h \
  luadebug.h
-lgc.o: lgc.c ldo.h lobject.h llimits.h lua.h lstate.h luadebug.h \
- lfunc.h lgc.h lmem.h lref.h lstring.h ltable.h ltm.h
-linit.o: linit.c lua.h lualib.h
-liolib.o: liolib.c lauxlib.h lua.h luadebug.h lualib.h
-llex.o: llex.c lauxlib.h lua.h llex.h lobject.h llimits.h lzio.h \
- lmem.h lparser.h lstate.h luadebug.h lstring.h
-lmathlib.o: lmathlib.c lauxlib.h lua.h lualib.h
-lmem.o: lmem.c lmem.h lua.h lobject.h llimits.h lstate.h luadebug.h
-lobject.o: lobject.c lobject.h llimits.h lua.h
-lparser.o: lparser.c lcode.h llex.h lobject.h llimits.h lua.h lzio.h \
- lopcodes.h lparser.h ldo.h lstate.h luadebug.h lfunc.h lmem.h \
- lstring.h
-lref.o: lref.c lapi.h lobject.h llimits.h lua.h lmem.h lref.h lstate.h \
+lgc.o: lgc.c lua.h ldo.h lobject.h llimits.h lstate.h luadebug.h \
+ lfunc.h lgc.h lmem.h lstring.h ltable.h ltm.h
+liolib.o: liolib.c lua.h lauxlib.h luadebug.h lualib.h
+llex.o: llex.c lua.h llex.h lobject.h llimits.h lzio.h lmem.h \
+ lparser.h lstate.h luadebug.h lstring.h ltable.h
+lmathlib.o: lmathlib.c lua.h lauxlib.h lualib.h
+lmem.o: lmem.c lua.h ldo.h lobject.h llimits.h lstate.h luadebug.h \
+ lmem.h
+lobject.o: lobject.c lua.h lmem.h llimits.h lobject.h lstate.h \
  luadebug.h
-lstate.o: lstate.c lauxlib.h lua.h lbuiltin.h ldo.h lobject.h \
- llimits.h lstate.h luadebug.h lgc.h llex.h lzio.h lmem.h lref.h \
- lstring.h ltm.h
-lstring.o: lstring.c lmem.h lua.h lobject.h llimits.h lstate.h \
+lparser.o: lparser.c lua.h lcode.h llex.h lobject.h llimits.h lzio.h \
+ lopcodes.h lparser.h lfunc.h lmem.h lstate.h luadebug.h lstring.h
+lstate.o: lstate.c lua.h ldo.h lobject.h llimits.h lstate.h luadebug.h \
+ lgc.h llex.h lzio.h lmem.h lstring.h ltable.h ltm.h
+lstring.o: lstring.c lua.h lmem.h llimits.h lobject.h lstate.h \
  luadebug.h lstring.h
-lstrlib.o: lstrlib.c lauxlib.h lua.h lualib.h
-ltable.o: ltable.c lauxlib.h lua.h lmem.h lobject.h llimits.h lstate.h \
- luadebug.h ltable.h
-ltests.o: ltests.c lapi.h lobject.h llimits.h lua.h lauxlib.h lmem.h \
- lopcodes.h lstate.h luadebug.h lstring.h ltable.h
-ltm.o: ltm.c lauxlib.h lua.h lmem.h lobject.h llimits.h lstate.h \
- luadebug.h ltm.h
+lstrlib.o: lstrlib.c lua.h lauxlib.h lualib.h
+ltable.o: ltable.c lua.h lmem.h llimits.h lobject.h lstate.h \
+ luadebug.h lstring.h ltable.h
+ltests.o: ltests.c lua.h lapi.h lobject.h llimits.h lauxlib.h lcode.h \
+ llex.h lzio.h lopcodes.h lparser.h ldebug.h lstate.h luadebug.h ldo.h \
+ lfunc.h lmem.h lstring.h ltable.h lualib.h
+ltm.o: ltm.c lua.h ldo.h lobject.h llimits.h lstate.h luadebug.h \
+ lmem.h ltm.h
 lua.o: lua.c lua.h luadebug.h lualib.h
-lundump.o: lundump.c lauxlib.h lua.h lfunc.h lobject.h llimits.h \
- lmem.h lopcodes.h lstring.h lstate.h luadebug.h lundump.h lzio.h
-lvm.o: lvm.c lauxlib.h lua.h ldebug.h lobject.h llimits.h luadebug.h \
- ldo.h lstate.h lfunc.h lgc.h lopcodes.h lstring.h ltable.h ltm.h \
+lundump.o: lundump.c lfunc.h lobject.h llimits.h lua.h lmem.h \
+ lopcodes.h lstring.h lstate.h luadebug.h lundump.h lzio.h
+lvm.o: lvm.c lua.h lapi.h lobject.h llimits.h ldebug.h lstate.h \
+ luadebug.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h ltable.h ltm.h \
  lvm.h
-lzio.o: lzio.c lzio.h
+lzio.o: lzio.c lua.h lzio.h