first implementation of centralized global state.

1 files changed, 82 insertions, 97 deletions

diff --git a/lapi.c b/lapi.c
index 2b37a72d..a65cc510 100644
--- a/lapi.c
+++ b/lapi.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lapi.c,v 1.3 1997/10/24 17:17:24 roberto Exp roberto $
+** $Id: lapi.c,v 1.4 1997/11/04 15:27:53 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
@@ -10,13 +10,12 @@
 
 #include "lapi.h"
 #include "lauxlib.h"
-#include "lbuiltin.h"
 #include "ldo.h"
 #include "lfunc.h"
 #include "lgc.h"
-#include "llex.h"
 #include "lmem.h"
 #include "lobject.h"
+#include "lstate.h"
 #include "lstring.h"
 #include "ltable.h"
 #include "ltm.h"
@@ -38,41 +37,41 @@ TObject *luaA_Address (lua_Object o)
 
 void luaA_packresults (void)
 {
-  luaV_pack(luaD_Cstack.lua2C, luaD_Cstack.num, luaD_stack.top);
+  luaV_pack(L->Cstack.lua2C, L->Cstack.num, L->stack.top);
   incr_top;
 }
 
 
 int luaA_passresults (void)
 {
-  luaD_checkstack(luaD_Cstack.num);
-  memcpy(luaD_stack.top, luaD_Cstack.lua2C+luaD_stack.stack,
-         luaD_Cstack.num*sizeof(TObject));
-  luaD_stack.top += luaD_Cstack.num;
-  return luaD_Cstack.num;
+  luaD_checkstack(L->Cstack.num);
+  memcpy(L->stack.top, L->Cstack.lua2C+L->stack.stack,
+         L->Cstack.num*sizeof(TObject));
+  L->stack.top += L->Cstack.num;
+  return L->Cstack.num;
 }
 
 
 static void checkCparams (int nParams)
 {
-  if (luaD_stack.top-luaD_stack.stack < luaD_Cstack.base+nParams)
+  if (L->stack.top-L->stack.stack < L->Cstack.base+nParams)
     lua_error("API error - wrong number of arguments in C2lua stack");
 }
 
 
 static lua_Object put_luaObject (TObject *o)
 {
-  luaD_openstack((luaD_stack.top-luaD_stack.stack)-luaD_Cstack.base);
-  luaD_stack.stack[luaD_Cstack.base++] = *o;
-  return luaD_Cstack.base;  /* this is +1 real position (see Ref) */
+  luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+  L->stack.stack[L->Cstack.base++] = *o;
+  return L->Cstack.base;  /* this is +1 real position (see Ref) */
 }
 
 
 static lua_Object put_luaObjectonTop (void)
 {
-  luaD_openstack((luaD_stack.top-luaD_stack.stack)-luaD_Cstack.base);
-  luaD_stack.stack[luaD_Cstack.base++] = *(--luaD_stack.top);
-  return luaD_Cstack.base;  /* this is +1 real position (see Ref) */
+  luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+  L->stack.stack[L->Cstack.base++] = *(--L->stack.top);
+  return L->Cstack.base;  /* this is +1 real position (see Ref) */
 }
 
 
@@ -89,20 +88,20 @@ lua_Object lua_pop (void)
 */
 lua_Object lua_lua2C (int number)
 {
-  if (number <= 0 || number > luaD_Cstack.num) return LUA_NOOBJECT;
-  /* Ref(luaD_stack.stack+(luaD_Cstack.lua2C+number-1)) ==
-     luaD_stack.stack+(luaD_Cstack.lua2C+number-1)-luaD_stack.stack+1 == */
-  return luaD_Cstack.lua2C+number;
+  if (number <= 0 || number > L->Cstack.num) return LUA_NOOBJECT;
+  /* Ref(L->stack.stack+(L->Cstack.lua2C+number-1)) ==
+     L->stack.stack+(L->Cstack.lua2C+number-1)-L->stack.stack+1 == */
+  return L->Cstack.lua2C+number;
 }
 
 
 lua_Object lua_upvalue (int n)
 {
-  TObject *f = luaD_stack.stack+luaD_Cstack.lua2C-1;
+  TObject *f = L->stack.stack+L->Cstack.lua2C-1;
   if (ttype(f) != LUA_T_MARK || n <= 0 || n > clvalue(f)->nelems)
     return LUA_NOOBJECT;
 if (ttype(protovalue(f)) != LUA_T_CPROTO) lua_error("BAD!!");
-  *luaD_stack.top = clvalue(f)->consts[n];
+  *L->stack.top = clvalue(f)->consts[n];
   incr_top;
   return put_luaObjectonTop();
 }
@@ -113,8 +112,8 @@ int lua_callfunction (lua_Object function)
   if (function == LUA_NOOBJECT)
     return 1;
   else {
-    luaD_openstack((luaD_stack.top-luaD_stack.stack)-luaD_Cstack.base);
-    luaD_stack.stack[luaD_Cstack.base] = *Address(function);
+    luaD_openstack((L->stack.top-L->stack.stack)-L->Cstack.base);
+    L->stack.stack[L->Cstack.base] = *Address(function);
     return luaD_protectedrun(MULT_RET);
   }
 }
@@ -129,16 +128,16 @@ lua_Object lua_gettagmethod (int tag, char *event)
 lua_Object lua_settagmethod (int tag, char *event)
 {
   checkCparams(1);
-  luaT_settagmethod(tag, event, luaD_stack.top-1);
+  luaT_settagmethod(tag, event, L->stack.top-1);
   return put_luaObjectonTop();
 }
 
 
 lua_Object lua_seterrormethod (void)
 {
-  TObject temp = luaD_errorim;
+  TObject temp = L->errorim;
   checkCparams(1);
-  luaD_errorim = *(--luaD_stack.top);
+  L->errorim = *(--L->stack.top);
   return put_luaObject(&temp);
 }
 
@@ -154,15 +153,15 @@ lua_Object lua_gettable (void)
 lua_Object lua_rawgettable (void)
 {
   checkCparams(2);
-  if (ttype(luaD_stack.top-2) != LUA_T_ARRAY)
+  if (ttype(L->stack.top-2) != LUA_T_ARRAY)
     lua_error("indexed expression not a table in raw gettable");
   else {
-    TObject *h = luaH_get(avalue(luaD_stack.top-2), luaD_stack.top-1);
-    --luaD_stack.top;
+    TObject *h = luaH_get(avalue(L->stack.top-2), L->stack.top-1);
+    --L->stack.top;
     if (h != NULL)
-      *(luaD_stack.top-1) = *h;
+      *(L->stack.top-1) = *h;
     else
-      ttype(luaD_stack.top-1) = LUA_T_NIL;
+      ttype(L->stack.top-1) = LUA_T_NIL;
   }
   return put_luaObjectonTop();
 }
@@ -171,14 +170,14 @@ lua_Object lua_rawgettable (void)
 void lua_settable (void)
 {
   checkCparams(3);
-  luaV_settable(luaD_stack.top-3, 1);
+  luaV_settable(L->stack.top-3, 1);
 }
 
 
 void lua_rawsettable (void)
 {
   checkCparams(3);
-  luaV_settable(luaD_stack.top-3, 0);
+  luaV_settable(L->stack.top-3, 0);
 }
 
 
@@ -192,6 +191,12 @@ lua_Object lua_createtable (void)
 }
 
 
+lua_Object lua_globalbag (void)
+{
+  return put_luaObject(&L->globalbag);
+}
+
+
 lua_Object lua_getglobal (char *name)
 {
   luaD_checkstack(2);  /* may need that to call T.M. */
@@ -219,7 +224,7 @@ void lua_rawsetglobal (char *name)
 {
   TaggedString *ts = luaS_new(name);
   checkCparams(1);
-  luaS_rawsetglobal(ts, --luaD_stack.top);
+  luaS_rawsetglobal(ts, --L->stack.top);
 }
 
 
@@ -293,24 +298,24 @@ lua_CFunction lua_getcfunction (lua_Object object)
 
 void lua_pushnil (void)
 {
-  ttype(luaD_stack.top) = LUA_T_NIL;
+  ttype(L->stack.top) = LUA_T_NIL;
   incr_top;
 }
 
 void lua_pushnumber (real n)
 {
-  ttype(luaD_stack.top) = LUA_T_NUMBER;
-  nvalue(luaD_stack.top) = n;
+  ttype(L->stack.top) = LUA_T_NUMBER;
+  nvalue(L->stack.top) = n;
   incr_top;
 }
 
 void lua_pushstring (char *s)
 {
   if (s == NULL)
-    ttype(luaD_stack.top) = LUA_T_NIL;
+    ttype(L->stack.top) = LUA_T_NIL;
   else {
-    tsvalue(luaD_stack.top) = luaS_new(s);
-    ttype(luaD_stack.top) = LUA_T_STRING;
+    tsvalue(L->stack.top) = luaS_new(s);
+    ttype(L->stack.top) = LUA_T_STRING;
   }
   incr_top;
   luaC_checkGC();
@@ -319,13 +324,13 @@ void lua_pushstring (char *s)
 void lua_pushCclosure (lua_CFunction fn, int n)
 {
   if (fn == NULL) {
-    ttype(luaD_stack.top) = LUA_T_NIL;
+    ttype(L->stack.top) = LUA_T_NIL;
     incr_top;
   }
   else {
     checkCparams(n);
-    ttype(luaD_stack.top) = LUA_T_CPROTO;
-    fvalue(luaD_stack.top) = fn;
+    ttype(L->stack.top) = LUA_T_CPROTO;
+    fvalue(L->stack.top) = fn;
     incr_top;
     luaV_closure(n);
   }
@@ -335,15 +340,15 @@ void lua_pushusertag (void *u, int tag)
 {
   if (tag < 0 && tag != LUA_ANYTAG)
     luaT_realtag(tag);  /* error if tag is not valid */
-  tsvalue(luaD_stack.top) = luaS_createudata(u, tag);
-  ttype(luaD_stack.top) = LUA_T_USERDATA;
+  tsvalue(L->stack.top) = luaS_createudata(u, tag);
+  ttype(L->stack.top) = LUA_T_USERDATA;
   incr_top;
   luaC_checkGC();
 }
 
 void luaA_pushobject (TObject *o)
 {
-  *luaD_stack.top = *o;
+  *L->stack.top = *o;
   incr_top;
 }
 
@@ -351,9 +356,9 @@ void lua_pushobject (lua_Object o)
 {
   if (o == LUA_NOOBJECT)
     lua_error("API error - attempt to push a NOOBJECT");
-  *luaD_stack.top = *Address(o);
-  if (ttype(luaD_stack.top) == LUA_T_MARK)
-    ttype(luaD_stack.top) = LUA_T_FUNCTION;
+  *L->stack.top = *Address(o);
+  if (ttype(L->stack.top) == LUA_T_MARK)
+    ttype(L->stack.top) = LUA_T_FUNCTION;
   incr_top;
 }
 
@@ -376,18 +381,18 @@ void lua_settag (int tag)
 {
   checkCparams(1);
   luaT_realtag(tag);
-  switch (ttype(luaD_stack.top-1)) {
+  switch (ttype(L->stack.top-1)) {
     case LUA_T_ARRAY:
-      (luaD_stack.top-1)->value.a->htag = tag;
+      (L->stack.top-1)->value.a->htag = tag;
       break;
     case LUA_T_USERDATA:
-      (luaD_stack.top-1)->value.ts->u.d.tag = tag;
+      (L->stack.top-1)->value.ts->u.d.tag = tag;
       break;
     default:
       luaL_verror("cannot change the tag of a %s",
-                  luaO_typenames[-ttype((luaD_stack.top-1))]);
+                  luaO_typenames[-ttype((L->stack.top-1))]);
   }
-  luaD_stack.top--;
+  L->stack.top--;
 }
 
 
@@ -406,10 +411,10 @@ lua_LHFunction lua_linehook = NULL;
 lua_Function lua_stackedfunction (int level)
 {
   StkId i;
-  for (i = (luaD_stack.top-1)-luaD_stack.stack; i>=0; i--)
-    if (luaD_stack.stack[i].ttype == LUA_T_MARK)
+  for (i = (L->stack.top-1)-L->stack.stack; i>=0; i--)
+    if (L->stack.stack[i].ttype == LUA_T_MARK)
       if (level-- == 0)
-        return Ref(luaD_stack.stack+i);
+        return Ref(L->stack.stack+i);
   return LUA_NOOBJECT;
 }
 
@@ -417,7 +422,7 @@ lua_Function lua_stackedfunction (int level)
 int lua_currentline (lua_Function func)
 {
   TObject *f = Address(func);
-  return (f+1 < luaD_stack.top && (f+1)->ttype == LUA_T_LINE) ? (f+1)->value.i : -1;
+  return (f+1 < L->stack.top && (f+1)->ttype == LUA_T_LINE) ? (f+1)->value.i : -1;
 }
 
 
@@ -447,11 +452,11 @@ int lua_setlocal (lua_Function func, int local_number)
   TProtoFunc *fp = protovalue(f)->value.tf;
   char *name = luaF_getlocalname(fp, local_number, lua_currentline(func));
   checkCparams(1);
-  --luaD_stack.top;
+  --L->stack.top;
   if (name) {
     /* if "name", there must be a LUA_T_LINE */
     /* therefore, f+2 points to function base */
-    *((f+2)+(local_number-1)) = *luaD_stack.top;
+    *((f+2)+(local_number-1)) = *L->stack.top;
     return 1;
   }
   else
@@ -478,19 +483,18 @@ void lua_funcinfo (lua_Object func, char **filename, int *linedefined)
 }
 
 
-static TObject *functofind;
 static int checkfunc (TObject *o)
 {
     return (o->ttype == LUA_T_FUNCTION) &&
-           ((functofind->ttype == LUA_T_FUNCTION) ||
-            (functofind->ttype == LUA_T_MARK)) &&
-           (functofind->value.cl == o->value.cl);
+           ((L->functofind->ttype == LUA_T_FUNCTION) ||
+            (L->functofind->ttype == LUA_T_MARK)) &&
+           (L->functofind->value.cl == o->value.cl);
 }
 
 
 char *lua_getobjname (lua_Object o, char **name)
 { /* try to find a name for given function */
-  functofind = Address(o);
+  L->functofind = Address(o);
   if ((*name = luaT_travtagmethods(checkfunc)) != NULL)
     return "tag-method";
   else if ((*name = luaS_travsymbol(checkfunc)) != NULL)
@@ -504,36 +508,30 @@ char *lua_getobjname (lua_Object o, char **name)
 ** =======================================================
 */
 
-#define MAX_C_BLOCKS 10
-
-static int numCblocks = 0;
-static struct C_Lua_Stack Cblocks[MAX_C_BLOCKS];
 
 void lua_beginblock (void)
 {
-  if (numCblocks >= MAX_C_BLOCKS)
+  if (L->numCblocks >= MAX_C_BLOCKS)
     lua_error("`lua_beginblock': too many nested blocks");
-  Cblocks[numCblocks] = luaD_Cstack;
-  numCblocks++;
+  L->Cblocks[L->numCblocks] = L->Cstack;
+  L->numCblocks++;
 }
 
 void lua_endblock (void)
 {
-  --numCblocks;
-  luaD_Cstack = Cblocks[numCblocks];
-  luaD_adjusttop(luaD_Cstack.base);
+  --L->numCblocks;
+  L->Cstack = L->Cblocks[L->numCblocks];
+  luaD_adjusttop(L->Cstack.base);
 }
 
 
 
-
-
 int lua_ref (int lock)
 {
   int ref;
   checkCparams(1);
-  ref = luaC_ref(luaD_stack.top-1, lock);
-  luaD_stack.top--;
+  ref = luaC_ref(L->stack.top-1, lock);
+  L->stack.top--;
   return ref;
 }
 
@@ -546,19 +544,6 @@ lua_Object lua_getref (int ref)
 }
 
 
-void lua_open (void)
-{
-  static int firsttime = 1;
-  if (!firsttime) return;
-  firsttime = 0;
-  luaS_init();
-  luaX_init();
-  luaT_init();
-  luaD_init();
-  luaB_predefine();
-}
-
-
 
 #if LUA_COMPAT2_5
 /*
@@ -567,11 +552,11 @@ void lua_open (void)
 
 static void do_unprotectedrun (lua_CFunction f, int nParams, int nResults)
 {
-  StkId base = (luaD_stack.top-luaD_stack.stack)-nParams;
+  StkId base = (L->stack.top-L->stack.stack)-nParams;
   luaD_openstack(nParams);
-  luaD_stack.stack[base].ttype = LUA_T_CPROTO;
-  luaD_stack.stack[base].value.f = f;
-  luaF_simpleclosure(luaD_stack.stack+base);
+  L->stack.stack[base].ttype = LUA_T_CPROTO;
+  L->stack.stack[base].value.f = f;
+  luaF_simpleclosure(L->stack.stack+base);
   luaD_call(base+1, nResults);
 }