Function posrelat

Plugins/UnLuaExtensions/LuaProtobuf/Source/src/pb.cpp:231–235

}

static lua_Integer posrelat(lua_Integer pos, size_t len) {
    if (pos >= 0) return pos;
    else if (0u - (size_t)pos > len) return 0;
    else return (lua_Integer)len + pos + 1;
}

static lua_Integer rangerelat(lua_State *L, int idx, lua_Integer r[2], size_t len) {
    r[0] = posrelat(luaL_optinteger(L, idx, 1), len);