Function SafeLoad

src/openttd.cpp:941–994

* Load the specified savegame but on error do different things. * If loading fails due to corrupt savegame, bad version, etc. go back to * a previous correct state. In the menu for example load the intro game again. * @param filename file to be loaded * @param fop mode of loading, always SLO_LOAD * @param newgm switch to this mode of loading fails due to some unknown error * @param subdir de

 * @param lf Load filter to use, if nullptr: use filename + subdir.
 */
bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, std::shared_ptr<LoadFilter> lf = nullptr)
{
	assert(fop == SLO_LOAD);
	assert(dft == DFT_GAME_FILE || (lf == nullptr && dft == DFT_OLD_GAME_FILE));
	GameMode ogm = _game_mode;

	_game_mode = newgm;

	SaveOrLoadResult result = (lf == nullptr) ? SaveOrLoad(filename, fop, dft, subdir) : LoadWithFilter(std::move(lf));
	if (result == SL_OK) return true;

	if (_network_dedicated && ogm == GM_MENU) {
		/*
		 * If we are a dedicated server *and* we just were in the menu, then we
		 * are loading the first savegame. If that fails, not starting the
		 * server is a better reaction than starting the server with a newly
		 * generated map as it is quite likely to be started from a script.
		 */
		Debug(net, 0, "Loading requested map failed; closing server.");
		_exit_game = true;
		return false;
	}

	if (result != SL_REINIT) {
		_game_mode = ogm;
		return false;
	}

	if (_network_dedicated) {
		/*
		 * If we are a dedicated server, have already loaded/started a game,
		 * and then loading the savegame fails in a manner that we need to
		 * reinitialize everything. We must not fall back into the menu mode
		 * with the intro game, as that is unjoinable by clients. So there is
		 * nothing else to do than start a new game, as it might have failed
		 * trying to reload the originally loaded savegame/scenario.
		 */
		Debug(net, 0, "Loading game failed, so a new (random) game will be started");
		MakeNewGame(false, true);
		return false;
	}

	if (_network_server) {
		/* We can't load the intro game as server, so disconnect first. */
		NetworkDisconnect();
	}

	switch (ogm) {
		default:
		case GM_MENU:   LoadIntroGame();      break;
		case GM_EDITOR: MakeNewEditorWorld(); break;
	}
	return false;
}

static void UpdateSocialIntegration(GameMode game_mode)
{