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-rw-r--r--lauxlib.c29
1 files changed, 15 insertions, 14 deletions
diff --git a/lauxlib.c b/lauxlib.c
index 95c33218..e99f6f60 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
1/* 1/*
2** $Id: lauxlib.c,v 1.147 2005/08/18 16:04:05 roberto Exp roberto $ 2** $Id: lauxlib.c,v 1.148 2005/08/18 20:36:26 roberto Exp roberto $
3** Auxiliary functions for building Lua libraries 3** Auxiliary functions for building Lua libraries
4** See Copyright Notice in lua.h 4** See Copyright Notice in lua.h
5*/ 5*/
@@ -231,22 +231,23 @@ LUALIB_API void luaI_openlib (lua_State *L, const char *libname,
231 const luaL_reg *l, int nup) { 231 const luaL_reg *l, int nup) {
232 if (libname) { 232 if (libname) {
233 /* check whether lib already exists */ 233 /* check whether lib already exists */
234 luaL_getfield(L, LUA_GLOBALSINDEX, libname); 234 lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
235 if (lua_isnil(L, -1)) { /* not found? */ 235 lua_getfield(L, -1, libname); /* get _LOADED[libname] */
236 if (!lua_istable(L, -1)) { /* not found? */
236 lua_pop(L, 1); /* remove previous result */ 237 lua_pop(L, 1); /* remove previous result */
237 lua_newtable(L); /* create it */ 238 luaL_getfield(L, LUA_GLOBALSINDEX, libname); /* try global variable */
238 if (lua_getmetatable(L, LUA_GLOBALSINDEX)) 239 if (!lua_istable(L, -1)) {
239 lua_setmetatable(L, -2); /* share metatable with global table */ 240 if (!lua_isnil(L, -1))
240 /* register it with given name */ 241 luaL_error(L, "name conflict for module " LUA_QS, libname);
242 lua_pop(L, 1);
243 lua_newtable(L); /* create it */
244 lua_pushvalue(L, -1); /* register it with given name */
245 luaL_setfield(L, LUA_GLOBALSINDEX, libname);
246 }
241 lua_pushvalue(L, -1); 247 lua_pushvalue(L, -1);
242 luaL_setfield(L, LUA_GLOBALSINDEX, libname); 248 lua_setfield(L, -3, libname); /* _LOADED[libname] = new table */
243 } 249 }
244 else if (!lua_istable(L, -1)) 250 lua_remove(L, -2); /* remove _LOADED table */
245 luaL_error(L, "name conflict for library " LUA_QS, libname);
246 lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
247 lua_pushvalue(L, -2);
248 lua_setfield(L, -2, libname); /* _LOADED[modname] = new table */
249 lua_pop(L, 1); /* remove _LOADED table */
250 lua_insert(L, -(nup+1)); /* move library table to below upvalues */ 251 lua_insert(L, -(nup+1)); /* move library table to below upvalues */
251 } 252 }
252 for (; l->name; l++) { 253 for (; l->name; l++) {