Function lua_getmetatable

src/Chain/libraries/glua/lapi.cpp:699–723

LUA_API int lua_getmetatable(lua_State *L, int objindex) {
    const TValue *obj;
    Table *mt;
    int res = 0;
    lua_lock(L);
    obj = index2addr(L, objindex);
    switch (ttnov(obj)) {
    case LUA_TTABLE:
        mt = hvalue(obj)->metatable;
        break;
    case LUA_TUSERDATA:
        mt = uvalue(obj)->metatable;
        break;
    default:
        mt = G(L)->mt[ttnov(obj)];
        break;
    }
    if (mt != nullptr) {
        sethvalue(L, L->top, mt);
        api_incr_top(L);
        res = 1;
    }
    lua_unlock(L);
    return res;
}


LUA_API int lua_getuservalue(lua_State *L, int idx) {