lua_Object is a pointer to the stack (because now the stack doen't move)

lapi.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 1.60 1999/11/29 19:31:29 roberto Exp roberto $
+** $Id: lapi.c,v 1.61 1999/12/01 19:50:08 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -31,11 +31,6 @@ const char lua_ident[] = "$Lua: " LUA_VERSION " " LUA_COPYRIGHT " $\n"
 
 
 
-TObject *luaA_Address (lua_State *L, lua_Object o) {
-  return (o != LUA_NOOBJECT) ?  Address(L, o) : NULL;
-}
-
-
 static lua_Type normalized_type (const TObject *o) {
   int t = ttype(o);
   switch (t) {
@@ -71,14 +66,14 @@ static void checkCparams (lua_State *L, int nParams) {
 static lua_Object put_luaObject (lua_State *L, const TObject *o) {
   luaD_openstack(L, L->Cstack.base);
   *L->Cstack.base++ = *o;
-  return Ref(L, L->Cstack.base-1);
+  return L->Cstack.base-1;
 }
 
 
 lua_Object luaA_putObjectOnTop (lua_State *L) {
   luaD_openstack(L, L->Cstack.base);
   *L->Cstack.base++ = *(--L->top);
-  return Ref(L, L->Cstack.base-1);
+  return L->Cstack.base-1;
 }
 
 
@@ -102,7 +97,7 @@ lua_Object lua_pop (lua_State *L) {
 */
 lua_Object lua_lua2C (lua_State *L, int number) {
   if (number <= 0 || number > L->Cstack.num) return LUA_NOOBJECT;
-  return Ref(L, L->Cstack.lua2C+number-1);
+  return L->Cstack.lua2C+number-1;
 }
 
 
@@ -111,7 +106,7 @@ int lua_callfunction (lua_State *L, lua_Object function) {
     return 1;
   else {
     luaD_openstack(L, L->Cstack.base);
-    set_normalized(L->Cstack.base, Address(L, function));
+    set_normalized(L->Cstack.base, function);
     return luaD_protectedrun(L);
   }
 }
@@ -205,27 +200,33 @@ void lua_rawsetglobal (lua_State *L, const char *name) {
 
 
 const char *lua_type (lua_State *L, lua_Object o) {
-  return (o == LUA_NOOBJECT) ? "NOOBJECT" : luaO_typename(L, Address(L, o));
+  UNUSED(L);
+  return (o == LUA_NOOBJECT) ? "NOOBJECT" : luaO_typename(L, o);
 }
 
 int lua_isnil (lua_State *L, lua_Object o) {
-  return (o != LUA_NOOBJECT) && (ttype(Address(L, o)) == LUA_T_NIL);
+  UNUSED(L);
+  return (o != LUA_NOOBJECT) && (ttype(o) == LUA_T_NIL);
 }
 
 int lua_istable (lua_State *L, lua_Object o) {
-  return (o != LUA_NOOBJECT) && (ttype(Address(L, o)) == LUA_T_ARRAY);
+  UNUSED(L);
+  return (o != LUA_NOOBJECT) && (ttype(o) == LUA_T_ARRAY);
 }
 
 int lua_isuserdata (lua_State *L, lua_Object o) {
-  return (o != LUA_NOOBJECT) && (ttype(Address(L, o)) == LUA_T_USERDATA);
+  UNUSED(L);
+  return (o != LUA_NOOBJECT) && (ttype(o) == LUA_T_USERDATA);
 }
 
 int lua_iscfunction (lua_State *L, lua_Object o) {
+  UNUSED(L);
   return (lua_tag(L, o) == LUA_T_CPROTO);
 }
 
 int lua_isnumber (lua_State *L, lua_Object o) {
-  return (o != LUA_NOOBJECT) && (tonumber(Address(L, o)) == 0);
+  UNUSED(L);
+  return (o != LUA_NOOBJECT) && (tonumber(o) == 0);
 }
 
 int lua_isstring (lua_State *L, lua_Object o) {
@@ -239,41 +240,44 @@ int lua_isfunction (lua_State *L, lua_Object o) {
 }
 
 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(Address(L, o1), Address(L, o2));
+  else return luaO_equalObj(o1, o2);
 }
 
 
 double lua_getnumber (lua_State *L, lua_Object obj) {
- if (obj == LUA_NOOBJECT) return 0.0;
- if (tonumber(Address(L, obj))) return 0.0;
- else return (nvalue(Address(L, obj)));
+  UNUSED(L);
+  if (obj == LUA_NOOBJECT) return 0.0;
+  if (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, Address(L, obj)))
+  if (obj == LUA_NOOBJECT || tostring(L, obj))
     return NULL;
-  else return (svalue(Address(L, obj)));
+  else return (svalue(obj));
 }
 
 long lua_strlen (lua_State *L, lua_Object obj) {
-  luaC_checkGC(L);  /* `tostring' may create a new string */
-  if (obj == LUA_NOOBJECT || tostring(L, Address(L, obj)))
+  UNUSED(L);
+  if (obj == LUA_NOOBJECT || tostring(L, obj))
     return 0L;
-  else return (tsvalue(Address(L, obj))->u.s.len);
+  else return (tsvalue(obj)->u.s.len);
 }
 
 void *lua_getuserdata (lua_State *L, lua_Object obj) {
-  if (obj == LUA_NOOBJECT || ttype(Address(L, obj)) != LUA_T_USERDATA)
+  UNUSED(L);
+  if (obj == LUA_NOOBJECT || ttype(obj) != LUA_T_USERDATA)
     return NULL;
-  else return tsvalue(Address(L, obj))->u.d.value;
+  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 fvalue(luaA_protovalue(Address(L, obj)));
+  else return fvalue(luaA_protovalue(obj));
 }
 
 
@@ -330,16 +334,16 @@ void luaA_pushobject (lua_State *L, const TObject *o) {
 void lua_pushobject (lua_State *L, lua_Object o) {
   if (o == LUA_NOOBJECT)
     lua_error(L, "API error - attempt to push a NOOBJECT");
-  set_normalized(L->top, Address(L, o));
+  set_normalized(L->top, o);
   incr_top;
 }
 
 
-int lua_tag (lua_State *L, lua_Object lo) {
-  if (lo == LUA_NOOBJECT)
+int lua_tag (lua_State *L, lua_Object o) {
+  UNUSED(L);
+  if (o == LUA_NOOBJECT)
      return LUA_T_NIL;
   else {
-    const TObject *o = Address(L, lo);
     int t;
     switch (t = ttype(o)) {
       case LUA_T_USERDATA:
@@ -429,8 +433,7 @@ int luaA_next (lua_State *L, const Hash *t, int i) {
 }
 
 
-int lua_next (lua_State *L, lua_Object o, int i) {
-  const TObject *t = Address(L, o);
+int lua_next (lua_State *L, lua_Object t, int i) {
   if (ttype(t) != LUA_T_ARRAY)
     lua_error(L, "API error - object is not a table in `lua_next'"); 
   i = luaA_next(L, avalue(t), i);
@@ -482,33 +485,31 @@ lua_Function lua_stackedfunction (lua_State *L, int level) {
     int t = L->stack[i].ttype;
     if (t == LUA_T_CLMARK || t == LUA_T_PMARK || t == LUA_T_CMARK)
       if (level-- == 0)
-        return Ref(L, L->stack+i);
+        return L->stack+i;
   }
   return LUA_NOOBJECT;
 }
 
 
-int lua_nups (lua_State *L, lua_Function func) {
-  const TObject *o = luaA_Address(L, func);
-  return (!o || normalized_type(o) != LUA_T_CLOSURE) ? 0 : o->value.cl->nelems;
+int lua_nups (lua_State *L, lua_Function f) {
+  UNUSED(L);
+  return (!f || normalized_type(f) != LUA_T_CLOSURE) ? 0 : f->value.cl->nelems;
 }
 
 
-int lua_currentline (lua_State *L, lua_Function func) {
-  const TObject *f = Address(L, func);
+int lua_currentline (lua_State *L, lua_Function f) {
   return (f+1 < L->top && (f+1)->ttype == LUA_T_LINE) ? (f+1)->value.i : -1;
 }
 
 
-lua_Object lua_getlocal (lua_State *L, lua_Function func, int local_number,
+lua_Object lua_getlocal (lua_State *L, lua_Function f, int local_number,
                          const char **name) {
-  /* check whether func is a Lua function */
-  if (lua_tag(L, func) != LUA_T_PROTO)
+  /* check whether `f' is a Lua function */
+  if (lua_tag(L, f) != LUA_T_PROTO)
     return LUA_NOOBJECT;
   else {
-    TObject *f = Address(L, func);
     TProtoFunc *fp = luaA_protovalue(f)->value.tf;
-    *name = luaF_getlocalname(fp, local_number, lua_currentline(L, func));
+    *name = luaF_getlocalname(fp, local_number, lua_currentline(L, f));
     if (*name) {
       /* if "*name", there must be a LUA_T_LINE */
       /* therefore, f+2 points to function base */
@@ -520,15 +521,14 @@ lua_Object lua_getlocal (lua_State *L, lua_Function func, int local_number,
 }
 
 
-int lua_setlocal (lua_State *L, lua_Function func, int local_number) {
-  /* check whether func is a Lua function */
-  if (lua_tag(L, func) != LUA_T_PROTO)
+int lua_setlocal (lua_State *L, lua_Function f, int local_number) {
+  /* check whether `f' is a Lua function */
+  if (lua_tag(L, f) != LUA_T_PROTO)
     return 0;
   else {
-    TObject *f = Address(L, func);
     TProtoFunc *fp = luaA_protovalue(f)->value.tf;
     const char *name = luaF_getlocalname(fp, local_number,
-                                         lua_currentline(L, func));
+                                         lua_currentline(L, f));
     checkCparams(L, 1);
     --L->top;
     if (name) {
@@ -548,7 +548,7 @@ void lua_funcinfo (lua_State *L, lua_Object func,
   if (!lua_isfunction(L, func))
     lua_error(L, "API error - `funcinfo' called with a non-function value");
   else {
-    const TObject *f = luaA_protovalue(Address(L, func));
+    const TObject *f = luaA_protovalue(func);
     if (normalized_type(f) == LUA_T_PROTO) {
       *source = tfvalue(f)->source->str;
       *linedefined = tfvalue(f)->lineDefined;
@@ -569,7 +569,7 @@ static int checkfunc (lua_State *L, TObject *o) {
 const char *lua_getobjname (lua_State *L, lua_Object o, const char **name) {
   /* try to find a name for given function */
   GlobalVar *g;
-  set_normalized(L->top, Address(L, o)); /* to be used by `checkfunc' */
+  set_normalized(L->top, o); /* to be used by `checkfunc' */
   for (g=L->rootglobal; g; g=g->next) {
     if (checkfunc(L, &g->value)) {
       *name = g->name->str;

lapi.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.h,v 1.8 1999/11/04 17:22:26 roberto Exp roberto $
+** $Id: lapi.h,v 1.9 1999/11/22 13:12:07 roberto Exp roberto $
 ** Auxiliary functions from Lua API
 ** See Copyright Notice in lua.h
 */
@@ -11,7 +11,6 @@
 #include "lobject.h"
 
 
-TObject *luaA_Address (lua_State *L, lua_Object o);
 void luaA_pushobject (lua_State *L, const TObject *o);
 GlobalVar *luaA_nextvar (lua_State *L, TaggedString *g);
 int luaA_next (lua_State *L, const Hash *t, int i);

lbuiltin.c

@@ -1,5 +1,5 @@
 /*
-** $Id: lbuiltin.c,v 1.78 1999/11/30 13:06:50 roberto Exp roberto $
+** $Id: lbuiltin.c,v 1.79 1999/12/01 19:50:08 roberto Exp roberto $
 ** Built-in functions
 ** See Copyright Notice in lua.h
 */
@@ -70,7 +70,7 @@ static real getnarg (lua_State *L, const Hash *a) {
 
 
 static Hash *gettable (lua_State *L, int arg) {
-  return avalue(luaA_Address(L, luaL_tablearg(L, arg)));
+  return avalue(luaL_tablearg(L, arg));
 }
 
 /* }====================================================== */
@@ -329,7 +329,7 @@ static void luaB_call (lua_State *L) {
 
 
 static void luaB_nextvar (lua_State *L) {
-  const TObject *o = luaA_Address(L, luaL_nonnullarg(L, 1));
+  lua_Object o = luaL_nonnullarg(L, 1);
   TaggedString *g;
   if (ttype(o) == LUA_T_NIL)
     g = NULL;
@@ -344,7 +344,7 @@ static void luaB_nextvar (lua_State *L) {
 
 static void luaB_next (lua_State *L) {
   const Hash *a = gettable(L, 1);
-  const TObject *k = luaA_Address(L, luaL_nonnullarg(L, 2));
+  lua_Object k = luaL_nonnullarg(L, 2);
   int i;  /* will get first element after `i' */
   if (ttype(k) == LUA_T_NIL)
     i = 0;  /* get first */
@@ -358,15 +358,14 @@ static void luaB_next (lua_State *L) {
 
 
 static void luaB_tostring (lua_State *L) {
-  lua_Object obj = lua_getparam(L, 1);
-  const TObject *o = luaA_Address(L, obj);
+  lua_Object o = lua_getparam(L, 1);
   char buff[64];
   switch (ttype(o)) {
     case LUA_T_NUMBER:
-      lua_pushstring(L, lua_getstring(L, obj));
+      lua_pushstring(L, lua_getstring(L, o));
       return;
     case LUA_T_STRING:
-      lua_pushobject(L, obj);
+      lua_pushobject(L, o);
       return;
     case LUA_T_ARRAY:
       sprintf(buff, "table: %p", o->value.a);
@@ -417,7 +416,7 @@ static void luaB_foreachi (lua_State *L) {
   const Hash *t = gettable(L, 1);
   int n = (int)getnarg(L, t);
   int i;
-  StkId f = luaA_Address(L, luaL_functionarg(L, 2));
+  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;
@@ -433,7 +432,7 @@ static void luaB_foreachi (lua_State *L) {
 
 static void luaB_foreach (lua_State *L) {
   const Hash *a = gettable(L, 1);
-  StkId f = luaA_Address(L, luaL_functionarg(L, 2));
+  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++) {
@@ -452,7 +451,7 @@ static void luaB_foreach (lua_State *L) {
 
 
 static void luaB_foreachvar (lua_State *L) {
-  StkId f = luaA_Address(L, luaL_functionarg(L, 1));
+  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) {
@@ -492,7 +491,7 @@ static void luaB_tinsert (lua_State *L) {
   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, luaA_Address(L, v));  /* a[pos] = v */
+  luaH_setint(L, a, pos, v);  /* a[pos] = v */
 }
 
 
@@ -525,7 +524,7 @@ static int sort_comp (lua_State *L, lua_Object f, const TObject *a,
                                                   const TObject *b) {
   /* notice: the caller (auxsort) must check stack space */
   if (f != LUA_NOOBJECT) {
-    *(L->top) = *luaA_Address(L, f);
+    *(L->top) = *f;
     *(L->top+1) = *a;
     *(L->top+2) = *b;
     L->top += 3;
@@ -618,20 +617,20 @@ static void mem_query (lua_State *L) {
 
 
 static void hash_query (lua_State *L) {
-  const TObject *o = luaA_Address(L, luaL_nonnullarg(L, 1));
+  lua_Object o = luaL_nonnullarg(L, 1);
   if (lua_getparam(L, 2) == LUA_NOOBJECT) {
     luaL_arg_check(L, ttype(o) == LUA_T_STRING, 1, "string expected");
     lua_pushnumber(L, tsvalue(o)->hash);
   }
   else {
-    const Hash *t = avalue(luaA_Address(L, luaL_tablearg(L, 2)));
+    const Hash *t = avalue(luaL_tablearg(L, 2));
     lua_pushnumber(L, luaH_mainposition(L, t, o) - t->node);
   }
 }
 
 
 static void table_query (lua_State *L) {
-  const Hash *t = avalue(luaA_Address(L, luaL_tablearg(L, 1)));
+  const Hash *t = avalue(luaL_tablearg(L, 1));
   int i = luaL_opt_int(L, 2, -1);
   if (i == -1) {
     lua_pushnumber(L, t->size);

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.53 1999/11/25 18:58:51 roberto Exp roberto $
+** $Id: ldo.c,v 1.54 1999/12/01 19:50:08 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -121,8 +121,8 @@ void luaD_callHook (lua_State *L, StkId base, const TProtoFunc *tf,
   else {
     TObject *f = base-1;
     if (tf)
-      (*L->callhook)(L, Ref(L, f), tf->source->str, tf->lineDefined);
-    else (*L->callhook)(L, Ref(L, f), "(C)", -1);
+      v 1.3 1997/10/16, f, tf->source->str, tf->lineDefined);
+    else (*L->callhook)(L, f, "(C)", -1);
   }
   L->top = old_top;
   L->Cstack = oldCLS;

ldo.h

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.h,v 1.11 1999/11/25 18:58:51 roberto Exp roberto $
+** $Id: ldo.h,v 1.12 1999/12/01 19:50:08 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -23,12 +23,6 @@
 #define incr_top {if (L->top == L->stack_last) luaD_checkstack(L, 1); L->top++;}
 
 
-/* macros to convert from lua_Object to (TObject *) and back */
-
-#define Address(L, lo)     ((lo)+L->stack-1)
-#define Ref(L, st)         ((st)-L->stack+1)
-
-
 void luaD_init (lua_State *L);
 void luaD_adjusttop (lua_State *L, StkId base, int extra);
 void luaD_openstack (lua_State *L, StkId pos);

lobject.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lobject.h,v 1.37 1999/11/22 13:12:07 roberto Exp roberto $
+** $Id: lobject.h,v 1.38 1999/11/26 18:59:20 roberto Exp roberto $
 ** Type definitions for Lua objects
 ** See Copyright Notice in lua.h
 */
@@ -26,6 +26,8 @@
 #endif
 
 
+#define UNUSED(x)	(void)x		/* to avoid warnings */
+
 /*
 ** "real" is the type "number" of Lua
 ** GREP LUA_NUMBER to change that

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.40 1999/11/29 19:11:36 roberto Exp roberto $
+** $Id: lua.h,v 1.41 1999/11/29 19:31:29 roberto Exp roberto $
 ** Lua - An Extensible Extension Language
 ** TeCGraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
 ** e-mail: [email protected]
@@ -16,8 +16,6 @@
 #define LUA_AUTHORS 	"W. Celes, R. Ierusalimschy & L. H. de Figueiredo"
 
 
-#define LUA_NOOBJECT  0
-
 #define LUA_NOREF	(-2)
 #define LUA_REFNIL	(-1)
 
@@ -26,7 +24,11 @@
 typedef struct lua_State lua_State;
 
 typedef void (*lua_CFunction) ( /* lua_State *L */ );
-typedef unsigned int lua_Object;
+
+typedef struct TObject *lua_Object;
+
+#define LUA_NOOBJECT	((lua_Object)0)
+
 
 lua_State     *lua_newstate (void);
 void           lua_close (lua_State *L);