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Throw an error if too many metatables are registered

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Louis-Antoine 2020-11-08 17:20:25 +01:00
parent 1155d875d5
commit e52cb7f6fa
1 changed files with 4 additions and 1 deletions
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5
src/lua_baselib.c
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@ -250,12 +250,15 @@ static int lib_userdataType(lua_State *L)
// Only callable during script loading // Only callable during script loading
static int lib_registerMetatable(lua_State *L) static int lib_registerMetatable(lua_State *L)
{ {
static UINT32 nextid = 1; static UINT16 nextid = 1;
if (!lua_lumploading) if (!lua_lumploading)
return luaL_error(L, "This function cannot be called from within a hook or coroutine!"); return luaL_error(L, "This function cannot be called from within a hook or coroutine!");
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
if (nextid == 0)
luaL_error(L, "Too many metatables registered?! Please consider rewriting your script once you are sober again.\n");
lua_getfield(L, LUA_REGISTRYINDEX, LREG_METATABLES); // 2 lua_getfield(L, LUA_REGISTRYINDEX, LREG_METATABLES); // 2
// registry.metatables[metatable] = nextid // registry.metatables[metatable] = nextid
lua_pushvalue(L, 1); // 3 lua_pushvalue(L, 1); // 3