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references must start after predefined values in the registry

This commit is contained in:
Roberto Ierusalimschy 2009-09-18 15:58:45 -03:00
parent 67cae2854c
commit 99182c6872
1 changed files with 8 additions and 8 deletions
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16
lauxlib.c
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@ -1,5 +1,5 @@
/*
** $Id: lauxlib.c,v 1.189 2009/07/15 17:26:14 roberto Exp roberto $
** $Id: lauxlib.c,v 1.190 2009/07/15 17:47:34 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
@ -443,9 +443,7 @@ LUALIB_API void luaL_buffinit (lua_State *L, luaL_Buffer *B) {
*/
/* number of prereserved references (for internal use) */
#define RESERVED_REFS 1 /* only FREELIST_REF is reserved */
#define FREELIST_REF 1 /* free list of references */
#define FREELIST_REF (LUA_RIDX_LAST + 1) /* free list of references */
LUALIB_API int luaL_ref (lua_State *L, int t) {
@ -463,10 +461,12 @@ LUALIB_API int luaL_ref (lua_State *L, int t) {
lua_rawseti(L, t, FREELIST_REF); /* (t[FREELIST_REF] = t[ref]) */
}
else { /* no free elements */
ref = (int)lua_objlen(L, t);
if (ref < RESERVED_REFS)
ref = RESERVED_REFS; /* skip reserved references */
ref++; /* create new reference */
ref = (int)lua_objlen(L, t) + 1; /* get a new reference */
if (ref == FREELIST_REF) { /* FREELIST_REF not initialized? */
lua_pushinteger(L, 0);
lua_rawseti(L, t, FREELIST_REF);
ref = FREELIST_REF + 1;
}
}
lua_rawseti(L, t, ref);
return ref;