Method createLua

src/bzflag/HubLua.cpp:140–222

//============================================================================//

bool HubLink::createLua(const std::string& code) {
  setupCallInMaps();

  L = luaL_newstate();
  if (L == NULL) {
    fail("luaL_newstate() error");
    return false;
  }

  lua_pushlightuserdata(L, this);
  lua_rawseti(L, LUA_REGISTRYINDEX, thisIndex);

  luaL_openlibs(L);

  // remove the "io" and "package" libraries
  lua_pushnil(L); lua_setfield(L, LUA_GLOBALSINDEX, "io");
  lua_pushnil(L); lua_setfield(L, LUA_GLOBALSINDEX, "package");

  // limit { os } table members
  std::vector<std::string> osFuncs;
  osFuncs.push_back("clock");
  osFuncs.push_back("date");
  osFuncs.push_back("time");
  osFuncs.push_back("difftime");
  limitMembers(L, "os", osFuncs);

  // limit { debug } table members
  std::vector<std::string> debugFuncs;
  debugFuncs.push_back("traceback");
  limitMembers(L, "debug", debugFuncs);

  // remove dofile() and loadfile()
  lua_pushnil(L); lua_setglobal(L, "dofile");
  lua_pushnil(L); lua_setglobal(L, "loadfile");

  if (!pushAnsiCodes()) {
    fail("pushAnsiCodes() error");
    return false;
  }
  if (!pushConstants()) {
    fail("pushConstants() error");
    return false;
  }
  if (!pushCallOuts()) {
    fail("pushCallOuts() error");
    return false;
  }

  // LuaDouble
  lua_pushvalue(L, LUA_GLOBALSINDEX);
  LuaDouble::PushEntries(L);
  lua_pop(L, 1);

  const char* chunkName = codeFileName.c_str();
  if (luaL_loadbuffer(L, code.c_str(), code.size(), chunkName) != 0) {
    std::string msg = "error: ";
    msg += lua_tostring(L, -1);
    fail(msg);