C++ common::Error类代码示例

void MainMenuDialog::save() {
	int slot = _saveDialog->runModalWithCurrentTarget();

	#if defined(__PLAYSTATION2__) && defined(DYNAMIC_MODULES)
	char pokeme[32];
	snprintf(pokeme,32,"hack");
	#endif

	if (slot >= 0) {
		Common::String result(_saveDialog->getResultString());
		if (result.empty()) {
			// If the user was lazy and entered no save name, come up with a default name.
			result = _saveDialog->createDefaultSaveDescription(slot);
		}

		Common::Error status = _engine->saveGameState(slot, result);
		if (status.getCode() != Common::kNoError) {
			Common::String failMessage = Common::String::format(_("Gamestate save failed (%s)! "
				  "Please consult the README for basic information, and for "
				  "instructions on how to obtain further assistance."), status.getDesc().c_str());
			GUI::MessageDialog dialog(failMessage);
			dialog.runModal();
		}

		close();
	}
}

void Engine::openMainMenuDialog() {
	if (!_mainMenuDialog)
		_mainMenuDialog = new MainMenuDialog(this);

	setGameToLoadSlot(-1);

	runDialog(*_mainMenuDialog);

	// Load savegame after main menu execution
	// (not from inside the menu loop to avoid
	// mouse cursor glitches and simliar bugs,
	// e.g. #2822778).
	if (_saveSlotToLoad >= 0) {
		Common::Error status = loadGameState(_saveSlotToLoad);
		if (status.getCode() != Common::kNoError) {
			Common::String failMessage = Common::String::format(_("Gamestate load failed (%s)! "
				  "Please consult the README for basic information, and for "
				  "instructions on how to obtain further assistance."), status.getDesc().c_str());
			GUI::MessageDialog dialog(failMessage);
			dialog.runModal();
		}
	}

	syncSoundSettings();
}

void MohawkEngine_Riven::loadGameStateAndDisplayError(int slot) {
	assert(slot >= 0);

	Common::Error loadError = loadGameState(slot);

	if (loadError.getCode() != Common::kNoError) {
		GUI::MessageDialog dialog(loadError.getDesc());
		dialog.runModal();
	}
}

Common::Error Pink::PinkEngine::run() {
	Common::Error error = init();
	if (error.getCode() != Common::kNoError)
		return error;

	while (!shouldQuit()) {
		Common::Event event;
		while (_eventMan->pollEvent(event)) {
			if (_director->processEvent(event))
				continue;

			switch (event.type) {
			case Common::EVENT_QUIT:
			case Common::EVENT_RTL:
				return Common::kNoError;
			case Common::EVENT_MOUSEMOVE:
				_actor->onMouseMove(event.mouse);
				break;
			case Common::EVENT_LBUTTONDOWN:
				_actor->onLeftButtonClick(event.mouse);
				break;
			case Common::EVENT_LBUTTONUP:
				_actor->onLeftButtonUp();
				break;
			case Common::EVENT_RBUTTONDOWN:
				if (isPeril())
					_actor->onRightButtonClick(event.mouse);
				break;
			case Common::EVENT_KEYDOWN:
				if (event.kbd.keycode == Common::KEYCODE_d && event.kbd.hasFlags(Common::KBD_CTRL)) {
					_console->attach();
					_console->onFrame();
				} else {
					_actor->onKeyboardButtonClick(event.kbd.keycode);
				}
				break;
			default:
				break;
			}
		}

		_actor->update();
		_director->update();
		_system->delayMillis(10);
	}

	return Common::kNoError;
}

Common::Error Sword25Engine::run() {
	// Engine initialisation
	Common::Error error = appStart();
	if (error.getCode() != Common::kNoError) {
		appEnd();
		return error;
	}

	// Run the game
	bool runSuccess = appMain();

	// Engine de-initialisation
	bool deinitSuccess = appEnd();

	return (runSuccess && deinitSuccess) ? Common::kNoError : Common::kUnknownError;
}

void displayErrorDialog(const Common::Error &error, const char *extraText) {
	Common::String errorText(extraText);
	errorText += " ";
	errorText += _(error.getDesc());
	GUI::MessageDialog alert(errorText);
	alert.runModal();
}

TestExitStatus SaveGametests::testErrorMessages() {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	saveFileMan->clearError();

	// Try opening a non existing file
	readAndVerifyData("tBedSomeNonExistentSaveFile.0", "File doesn't exists!");

	Common::Error err = saveFileMan->getError();
	if (err.getCode() == Common::kNoError) {
		// blunder! how come?
		Testsuite::logDetailedPrintf("SaveFileMan.getError() failed\n");
		return kTestFailed;
	}
	// Can't actually predict whether which error, kInvalidPath or kPathDoesNotExist or some other?
	// So just return kTestPassed if some error
	Testsuite::logDetailedPrintf("getError returned : %s\n", saveFileMan->getErrorDesc().c_str());
	return kTestPassed;
}

Common::Error DarkMoonEngine::init() {
	Common::Error err = EoBCoreEngine::init();
	if (err.getCode() != Common::kNoError)
		return err;

	initStaticResource();

	_monsterProps = new EoBMonsterProperty[10];

	if (_configRenderMode == Common::kRenderEGA) {
		Palette pal(16);
		_screen->loadPalette(_egaDefaultPalette, pal, 16);
		_screen->setScreenPalette(pal);
	}

	_screen->loadPalette("PALETTE.COL", _screen->getPalette(0));
	_screen->setScreenPalette(_screen->getPalette(0));

	return Common::kNoError;
}

bool EventRecorder::switchMode() {
	const Common::String gameId = ConfMan.get("gameid");
	const EnginePlugin *plugin = 0;
	EngineMan.findGame(gameId, &plugin);
	bool metaInfoSupport = (*plugin)->hasFeature(MetaEngine::kSavesSupportMetaInfo);
	bool featuresSupport = metaInfoSupport &&
						  g_engine->canSaveGameStateCurrently() &&
						  (*plugin)->hasFeature(MetaEngine::kSupportsListSaves) &&
						  (*plugin)->hasFeature(MetaEngine::kSupportsDeleteSave);
	if (!featuresSupport) {
		return false;
	}

	int emptySlot = 1;
	SaveStateList saveList = (*plugin)->listSaves(gameId.c_str());
	for (SaveStateList::const_iterator x = saveList.begin(); x != saveList.end(); ++x) {
		int saveSlot = x->getSaveSlot();
		if (saveSlot == 0) {
			continue;
		}
		if (emptySlot != saveSlot) {
			break;
		}
		emptySlot++;
	}
	Common::String saveName;
	if (emptySlot >= 0) {
		saveName = Common::String::format("Save %d", emptySlot + 1);
		Common::Error status = g_engine->saveGameState(emptySlot, saveName);
		if (status.getCode() == Common::kNoError) {
			Common::Event eventRTL;
			eventRTL.type = Common::EVENT_RTL;
			g_system->getEventManager()->pushEvent(eventRTL);
		}
	}
	ConfMan.set("record_mode", "", Common::ConfigManager::kTransientDomain);
	ConfMan.setInt("save_slot", emptySlot, Common::ConfigManager::kTransientDomain);
	_needcontinueGame = true;
	return true;
}

TestExitStatus SaveGametests::testListingSavefile() {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	saveFileMan->clearError();

	// create some savefiles
	const char *savefileName[] = {"tBedSavefileToList.0", "tBedSavefileToList.1", "tBedSavefileToList.2"};
	writeDataToFile("tBedSavefileToList.0", "Save me!");
	writeDataToFile("tBedSavefileToList.1", "Save me!");
	writeDataToFile("tBedSavefileToList.2", "Save me!");

	Common::Error err = saveFileMan->getError();

	if (err.getCode() != Common::kNoError) {
		// Abort. Some Error in writing files
		Testsuite::logDetailedPrintf("Error while creating savefiles: %s\n", err.getDesc().c_str());
		return kTestFailed;
	}

	Common::StringArray savefileList = saveFileMan->listSavefiles("tBedSavefileToList.?");
	if (savefileList.size() == ARRAYSIZE(savefileName)) {
		// Match them exactly
		// As the order of savefileList may be platform specific, match them exhaustively
		for (uint i = 0; i < ARRAYSIZE(savefileName); i++) {
			for (uint j = 0; j < savefileList.size(); j++) {
				if (savefileList[j].equals(savefileName[i])) {
					break;
				}
				if (savefileList.size() == j) {
					// A match for this name not found
					Testsuite::logDetailedPrintf("Listed Names don't match\n");
					return kTestFailed;
				}
			}
		}
		return kTestPassed;
	}

	Testsuite::logDetailedPrintf("listing Savefiles failed!\n");
	return kTestFailed;
}

Common::Error GagEngine::run()
{
	Init();

	Common::Error status;
	do
	{
		// do periodic processing
		uint32 time_start = _system->getMillis();
		status = Update();
		uint32 time_end = _system->getMillis();

		// wrap around check
		uint32 time_spent = time_end >= time_start ? time_end - time_start : std::numeric_limits<uint32>::max() - time_start + time_end + 1;

		// sleep remaining frame time
		uint time_for_frame = 1000 / _SCREEN_FPS;
		_system->delayMillis(time_spent < time_for_frame ? time_for_frame - time_spent : 0);
	}
	while(status.getCode() == Common::kNoError && !shouldQuit());

	return status;
}

// TODO: specify the possible return values here
static Common::Error runGame(const EnginePlugin *plugin, OSystem &system, const Common::String &edebuglevels) {
	// Determine the game data path, for validation and error messages
	Common::FSNode dir(ConfMan.get("path"));
	Common::Error err = Common::kNoError;
	Engine *engine = 0;

	// Verify that the game path refers to an actual directory
	if (!(dir.exists() && dir.isDirectory()))
		err = Common::kPathNotDirectory;

	// Create the game engine
	if (err.getCode() == Common::kNoError)
		err = (*plugin)->createInstance(&system, &engine);

	// Check for errors
	if (!engine || err.getCode() != Common::kNoError) {

		// Print a warning; note that scummvm_main will also
		// display an error dialog, so we don't have to do this here.
		warning("%s failed to instantiate engine: %s (target '%s', path '%s')",
			plugin->getName(),
			err.getDesc().c_str(),
			ConfMan.getActiveDomainName().c_str(),
			dir.getPath().c_str()
			);

		// Autoadded is set only when no path was provided and
		// the game is run from command line.
		//
		// Thus, we remove this garbage entry
		//
		// Fixes bug #1544799
		if (ConfMan.hasKey("autoadded")) {
			ConfMan.removeGameDomain(ConfMan.getActiveDomainName().c_str());
		}

		return err;
	}

	// Set the window caption to the game name
	Common::String caption(ConfMan.get("description"));

	if (caption.empty()) {
		caption = EngineMan.findGame(ConfMan.get("gameid")).description();
	}
	if (caption.empty())
		caption = ConfMan.getActiveDomainName();	// Use the domain (=target) name
	if (!caption.empty())	{
		system.setWindowCaption(caption.c_str());
	}

	//
	// Setup various paths in the SearchManager
	//

	// Add the game path to the directory search list
	SearchMan.addDirectory(dir.getPath(), dir, 0, 4);

	// Add extrapath (if any) to the directory search list
	if (ConfMan.hasKey("extrapath")) {
		dir = Common::FSNode(ConfMan.get("extrapath"));
		SearchMan.addDirectory(dir.getPath(), dir);
	}

	// If a second extrapath is specified on the app domain level, add that as well.
	if (ConfMan.hasKey("extrapath", Common::ConfigManager::kApplicationDomain)) {
		dir = Common::FSNode(ConfMan.get("extrapath", Common::ConfigManager::kApplicationDomain));
		SearchMan.addDirectory(dir.getPath(), dir);
	}

	// On creation the engine should have set up all debug levels so we can use
	// the command line arugments here
	Common::StringTokenizer tokenizer(edebuglevels, " ,");
	while (!tokenizer.empty()) {
		Common::String token = tokenizer.nextToken();
		if (!DebugMan.enableDebugChannel(token))
			warning(_("Engine does not support debug level '%s'"), token.c_str());
	}

	// Inform backend that the engine is about to be run
	system.engineInit();

	// Run the engine
	Common::Error result = engine->run();

	// Inform backend that the engine finished
	system.engineDone();

	// Free up memory
	delete engine;

	// We clear all debug levels again even though the engine should do it
	DebugMan.clearAllDebugChannels();

	// Reset the file/directory mappings
	SearchMan.clear();

	// Return result (== 0 means no error)
	return result;
//.........这里部分代码省略.........

extern "C" int scummvm_main(int argc, const char * const argv[]) {
	Common::String specialDebug;
	Common::String command;

	// Verify that the backend has been initialized (i.e. g_system has been set).
	assert(g_system);
	OSystem &system = *g_system;

	// Register config manager defaults
	Base::registerDefaults();

	// Parse the command line
	Common::StringMap settings;
	command = Base::parseCommandLine(settings, argc, argv);

	// Load the config file (possibly overridden via command line):
	if (settings.contains("config")) {
		ConfMan.loadConfigFile(settings["config"]);
		settings.erase("config");
	} else {
		ConfMan.loadDefaultConfigFile();
	}

	// Update the config file
	ConfMan.set("versioninfo", gScummVMVersion, Common::ConfigManager::kApplicationDomain);

	// Load and setup the debuglevel and the debug flags. We do this at the
	// soonest possible moment to ensure debug output starts early on, if
	// requested.
	if (settings.contains("debuglevel")) {
		gDebugLevel = (int)strtol(settings["debuglevel"].c_str(), 0, 10);
		printf("Debuglevel (from command line): %d\n", gDebugLevel);
		settings.erase("debuglevel");	// This option should not be passed to ConfMan.
	} else if (ConfMan.hasKey("debuglevel"))
		gDebugLevel = ConfMan.getInt("debuglevel");

	if (settings.contains("debugflags")) {
		specialDebug = settings["debugflags"];
		settings.erase("debugflags");
	}

	PluginManager::instance().init();
 	PluginManager::instance().loadAllPlugins(); // load plugins for cached plugin manager
	
	// If we received an invalid music parameter via command line we check this here.
	// We can't check this before loading the music plugins.
	// On the other hand we cannot load the plugins before we know the file paths (in case of external plugins).
	if (settings.contains("music-driver")) {
		if (MidiDriver::getMusicType(MidiDriver::getDeviceHandle(settings["music-driver"])) == MT_INVALID) {
			warning("Unrecognized music driver '%s'. Switching to default device", settings["music-driver"].c_str());
			settings["music-driver"] = "auto";
		}
	}

	// Process the remaining command line settings. Must be done after the
	// config file and the plugins have been loaded.
	Common::Error res;

	// TODO: deal with settings that require plugins to be loaded
	res = Base::processSettings(command, settings);
	if (res.getCode() != Common::kArgumentNotProcessed) {
		warning("%s", res.getDesc().c_str());
		return res.getCode();
	}

	// Init the backend. Must take place after all config data (including
	// the command line params) was read.
	system.initBackend();

	// If we received an invalid graphics mode parameter via command line
	// we check this here. We can't do it until after the backend is inited,
	// or there won't be a graphics manager to ask for the supported modes.

	if (settings.contains("gfx-mode")) {
		const OSystem::GraphicsMode *gm = g_system->getSupportedGraphicsModes();
		Common::String option = settings["gfx-mode"];
		bool isValid = false;

		while (gm->name && !isValid) {
			isValid = !scumm_stricmp(gm->name, option.c_str());
			gm++;
		}
		if (!isValid) {
			warning("Unrecognized graphics mode '%s'. Switching to default mode", option.c_str());
			settings["gfx-mode"] = "default";
		}
	}

	setupGraphics(system);

	// Init the different managers that are used by the engines.
	// Do it here to prevent fragmentation later
	system.getAudioCDManager();
	MusicManager::instance();
	Common::DebugManager::instance();
	
	// Init the event manager. As the virtual keyboard is loaded here, it must
	// take place after the backend is initiated and the screen has been setup
	system.getEventManager()->init();

//.........这里部分代码省略.........

extern "C" int scummvm_main(int argc, const char * const argv[]) {
	Common::String specialDebug;
	Common::String command;

	// Verify that the backend has been initialized (i.e. g_system has been set).
	assert(g_system);
	OSystem &system = *g_system;

	// Register config manager defaults
	Base::registerDefaults();

	// Parse the command line
	Common::StringMap settings;
	command = Base::parseCommandLine(settings, argc, argv);

	// Load the config file (possibly overridden via command line):
	if (settings.contains("config")) {
		ConfMan.loadConfigFile(settings["config"]);
		settings.erase("config");
	} else {
		ConfMan.loadDefaultConfigFile();
	}

	// Update the config file
	ConfMan.set("versioninfo", gScummVMVersion, Common::ConfigManager::kApplicationDomain);

	// Load and setup the debuglevel and the debug flags. We do this at the
	// soonest possible moment to ensure debug output starts early on, if
	// requested.
	if (settings.contains("debuglevel")) {
		gDebugLevel = (int)strtol(settings["debuglevel"].c_str(), 0, 10);
		printf("Debuglevel (from command line): %d\n", gDebugLevel);
		settings.erase("debuglevel");	// This option should not be passed to ConfMan.
	} else if (ConfMan.hasKey("debuglevel"))
		gDebugLevel = ConfMan.getInt("debuglevel");

	if (settings.contains("debugflags")) {
		specialDebug = settings["debugflags"];
		settings.erase("debugflags");
	} else if (ConfMan.hasKey("debugflags"))
		specialDebug = ConfMan.get("debugflags");

	if (settings.contains("debug-channels-only"))
		gDebugChannelsOnly = true;


	PluginManager::instance().init();
 	PluginManager::instance().loadAllPlugins(); // load plugins for cached plugin manager

	// If we received an invalid music parameter via command line we check this here.
	// We can't check this before loading the music plugins.
	// On the other hand we cannot load the plugins before we know the file paths (in case of external plugins).
	if (settings.contains("music-driver")) {
		if (MidiDriver::getMusicType(MidiDriver::getDeviceHandle(settings["music-driver"])) == MT_INVALID) {
			warning("Unrecognized music driver '%s'. Switching to default device", settings["music-driver"].c_str());
			settings["music-driver"] = "auto";
		}
	}

	// Process the remaining command line settings. Must be done after the
	// config file and the plugins have been loaded.
	Common::Error res;

	// TODO: deal with settings that require plugins to be loaded
	if (Base::processSettings(command, settings, res)) {
		if (res.getCode() != Common::kNoError)
			warning("%s", res.getDesc().c_str());
		return res.getCode();
	}

	// Init the backend. Must take place after all config data (including
	// the command line params) was read.
	system.initBackend();

	// If we received an invalid graphics mode parameter via command line
	// we check this here. We can't do it until after the backend is inited,
	// or there won't be a graphics manager to ask for the supported modes.

	if (settings.contains("gfx-mode")) {
		const OSystem::GraphicsMode *gm = g_system->getSupportedGraphicsModes();
		Common::String option = settings["gfx-mode"];
		bool isValid = false;

		while (gm->name && !isValid) {
			isValid = !scumm_stricmp(gm->name, option.c_str());
			gm++;
		}
		if (!isValid) {
			warning("Unrecognized graphics mode '%s'. Switching to default mode", option.c_str());
			settings["gfx-mode"] = "default";
		}
	}
	if (settings.contains("disable-display")) {
		ConfMan.setInt("disable-display", 1, Common::ConfigManager::kTransientDomain);
	}
	setupGraphics(system);

	// Init the different managers that are used by the engines.
	// Do it here to prevent fragmentation later
	system.getAudioCDManager();
//.........这里部分代码省略.........

void SaveLoadMenuScreen::checkError(Common::Error error) {
	if (error.getCode() != Common::kNoError) {
		GUI::MessageDialog dialog(error.getDesc());
		dialog.runModal();
	}
}