C++ File::exists方法代码示例

uint SoundChannel::play(uint soundNum, uint repeats, uint notify) {
	stop();
	if (repeats == 0)
		return 1;

	// Find a sound of the given name
	Audio::AudioStream *stream;
	Common::File f;
	Common::String nameSnd = Common::String::format("sound%u.snd", soundNum);
	Common::String nameWav = Common::String::format("sound%u.wav", soundNum);
	Common::String nameAiff = Common::String::format("sound%u.aiff", soundNum);
#ifdef USE_MAD
	Common::String nameMp3 = Common::String::format("sound%u.mp3", soundNum);
#endif

	if (f.exists(nameSnd) && f.open(nameSnd)) {
		if (f.readUint16BE() != (f.size() - 2))
			error("Invalid sound filesize");
		repeats = f.readByte();
		f.skip(1);
		uint freq = f.readUint16BE();
		f.skip(2);
		uint size = f.readUint16BE();

		Common::SeekableReadStream *s = f.readStream(size);
		stream = Audio::makeRawStream(s, freq, Audio::FLAG_UNSIGNED);

#ifdef USE_MAD
	} else if (f.exists(nameMp3) && f.open(nameMp3)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeMP3Stream(s, DisposeAfterUse::YES);
#endif
	} else if (f.exists(nameWav) && f.open(nameWav)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeWAVStream(s, DisposeAfterUse::YES);

	} else if (f.exists(nameAiff) && f.open(nameAiff)) {
		Common::SeekableReadStream *s = f.readStream(f.size());
		stream = Audio::makeAIFFStream(s, DisposeAfterUse::YES);

	} else {
		warning("Could not find sound %u", soundNum);
		return 1;
	}

	_soundNum = soundNum;
	_notify = notify;

	// Set up a repeat if multiple repeats are specified
	if (repeats > 1) {
		Audio::RewindableAudioStream *rwStream = dynamic_cast<Audio::RewindableAudioStream *>(stream);
		assert(rwStream);
		stream = new Audio::LoopingAudioStream(rwStream, repeats, DisposeAfterUse::YES);
	}

	// Start playing the audio
	g_vm->_mixer->playStream(Audio::Mixer::kPlainSoundType, &_handle, stream);
	return 0;
}

void Sound::playSpeech(const Common::String &name) {
	Resources &res = *_vm->_res;
	Scene &scene = *_vm->_scene;
	stopSpeech();

	// TODO: Technically Scalpel has an sfx command which I've set to call this method because it sets the
	// _voice variable as if it were speech. Need to do a play-through of Scalpel and see if it's ever called.
	// If so, will need to enhance this method to handle the Serrated Scalpel voice resources
	assert(IS_ROSE_TATTOO);

	// Figure out which speech library to use
	Common::String libraryName = Common::String::format("speech%02d.lib", scene._currentScene);
	if ((!scumm_strnicmp(name.c_str(), "SLVE12S", 7)) || (!scumm_strnicmp(name.c_str(), "WATS12X", 7))
			|| (!scumm_strnicmp(name.c_str(), "HOLM12X", 7)))
		libraryName = "SPEECH12.LIB";

	// If the speech library file doesn't even exist, then we can't play anything
	Common::File f;
	if (!f.exists(libraryName))
		return;

	// Ensure the given library is in the cache
	res.addToCache(libraryName);

	if (playSoundResource(name, libraryName, Audio::Mixer::kSpeechSoundType, _speechHandle))
		_speechPlaying = true;
}

bool TeenAgentEngine::showCDLogo() {
	Common::File cdlogo;
	if (!cdlogo.exists("cdlogo.res") || !cdlogo.open("cdlogo.res"))
		return true;

	byte bg[0xfa00];
	byte palette[3*256];

	cdlogo.read(bg, sizeof(bg));
	cdlogo.read(palette, sizeof(palette));
	for (uint c = 0; c < 3*256; ++c)
		palette[c] *= 4;
	_system->getPaletteManager()->setPalette(palette, 0, 0x100);
	_system->copyRectToScreen(bg, 320, 0, 0, 320, 200);
	_system->updateScreen();

	for(uint i = 0; i < 20; ++i) {
		int r = skipEvents();
		if (r != 0)
			return r > 0? true: false;
		_system->delayMillis(100);
	}
	cdlogo.close();

	return true;
}

bool TeenAgentEngine::showCDLogo() {
	Common::File cdlogo;
	if (!cdlogo.exists("cdlogo.res") || !cdlogo.open("cdlogo.res"))
		return true;

	byte bg[0xfa00];
	byte palette[0x400];

	cdlogo.read(bg, sizeof(bg));
	memset(palette, 0, sizeof(palette));

	for(uint c = 0; c < 0x100; ++c) {
		uint idx = c * 4;
		cdlogo.read(palette + idx, 3);
		palette[idx] *= 4;
		palette[idx + 1] *= 4;
		palette[idx + 2] *= 4;
	}
	_system->setPalette(palette, 0, 0x100);
	_system->copyRectToScreen(bg, 320, 0, 0, 320, 200);
	_system->updateScreen();

	for(uint i = 0; i < 20; ++i) {
		int r = skipEvents();
		if (r != 0)
			return r > 0? true: false;
		_system->delayMillis(100);
	}
	cdlogo.close();

	return true;
}

bool FileSystemUtil::fileExists(const Common::String &filename) {
	Common::File f;
	if (f.exists(filename))
		return true;

	// Check if the file exists in the save folder
	Common::FSNode folder(PersistenceService::getSavegameDirectory());
	Common::FSNode fileNode = folder.getChild(getPathFilename(filename));
	return fileNode.exists();
}

bool Debugger::Cmd_PlayText(int argc, const char **argv) {
	if (argc != 2) {
		debugPrintf("Usage: %s <text name>\n", argv[0]);
		return true;
	} else {
		Common::String resName = argv[1];
		if (resName.hasPrefix("@"))
			resName.deleteChar(0);

		Common::File f;
		if (f.exists(resName) || f.exists(resName + ".txr")) {
			TextView::execute(_vm, resName);
			return false;
		} else {
			debugPrintf("Could not find resource file\n");
			return true;
		}
	}
}

/**
 * Load Animation
 */
void AnimationManager::loadAnim(const Common::String &animName) {
	clearAnim();

	Common::String filename = animName + ".ANI";
	Common::File f;
	if (!f.open(filename))
		error("Failed to open %s", filename.c_str());

	int filesize = f.size();
	int nbytes = filesize - 115;

	char header[10];
	char dummyBuf[15];
	char filename1[15];
	char filename2[15];
	char filename3[15];
	char filename4[15];
	char filename5[15];
	char filename6[15];

	f.read(header, 10);
	f.read(dummyBuf, 15);
	f.read(filename1, 15);
	f.read(filename2, 15);
	f.read(filename3, 15);
	f.read(filename4, 15);
	f.read(filename5, 15);
	f.read(filename6, 15);

	if (READ_BE_UINT32(header) != MKTAG('A', 'N', 'I', 'S'))
		error("Invalid animation File: %s", filename.c_str());

	const char *files[6] = { &filename1[0], &filename2[0], &filename3[0], &filename4[0],
			&filename5[0], &filename6[0] };

	for (int idx = 0; idx <= 5; ++idx) {
		if (files[idx][0]) {
			if (!f.exists(files[idx]))
				error("Missing file %s in animation File: %s", files[idx], filename.c_str());
			if (loadSpriteBank(idx + 1, files[idx]))
				error("Invalid sprite bank in animation File: %s", filename.c_str());
		}
	}

	byte *data = _vm->_globals->allocMemory(nbytes + 1);
	f.read(data, nbytes);
	f.close();

	for (int idx = 1; idx <= 20; ++idx)
		searchAnim(data, idx, nbytes);

	_vm->_globals->freeMemory(data);
}

CString CResourceKey::exists() const {
	CString name = _key;

	// Check for a resource being specified within an ST container
	int idx = name.indexOf('#');
	if (idx >= 0) {
		name = name.left(idx);
		name += ".st";
	}

	// The original did tests for the file in the different
	// asset paths, which aren't needed in ScummVM
	Common::File f;
	return f.exists(name) ? name : CString();
}

void SherlockEngine::initialize() {
	DebugMan.addDebugChannel(kDebugLevelScript,      "scripts", "Script debug level");
	DebugMan.addDebugChannel(kDebugLevelAdLibDriver, "AdLib",   "AdLib driver debugging");
	DebugMan.addDebugChannel(kDebugLevelMT32Driver,  "MT32",    "MT32 driver debugging");
	DebugMan.addDebugChannel(kDebugLevelMusic,       "Music",   "Music debugging");

	Fonts::setVm(this);
	ImageFile::setVm(this);
	ImageFile3DO::setVm(this);
	BaseObject::setVm(this);

	if (isDemo()) {
		Common::File f;
		// The interactive demo doesn't have an intro thus doesn't include TITLE.SND
		// At the opposite, the non-interactive demo is only the intro.
		if (f.exists("TITLE.SND"))
			_interactiveFl = false;
	}

	_res = new Resources(this);
	_animation = new Animation(this);
	_debugger = Debugger::init(this);
	_events = new Events(this);
	_fixedText = FixedText::init(this);
	_inventory = Inventory::init(this);
	_map = Map::init(this);
	_music = new Music(this, _mixer);
	_journal = Journal::init(this);
	_people = People::init(this);
	_saves = SaveManager::init(this, _targetName);
	_scene = Scene::init(this);
	_screen = Screen::init(this);
	_sound = new Sound(this, _mixer);
	_talk = Talk::init(this);
	_ui = UserInterface::init(this);

	// Load game settings
	loadConfig();

	if (getPlatform() == Common::kPlatform3DO) {
		// Disable portraits on 3DO
		// 3DO does not include portrait data
		_people->_portraitsOn = false;
	}
}

FileManager::FileManager(XeenEngine *vm) {
	Common::File f;
	int sideNum = 0;

	File::_currentArchive = ANY_ARCHIVE;
	_isDarkCc = vm->getGameID() == GType_DarkSide;
	_archives[0] = _archives[1] = _archives[2] = nullptr;

	if (vm->getGameID() != GType_DarkSide) {
		_archives[0] = new CCArchive("xeen.cc", "xeen", true);
		SearchMan.add("xeen", _archives[0]);
		sideNum = 1;
	}

	if (vm->getGameID() == GType_DarkSide || vm->getGameID() == GType_WorldOfXeen) {
		_archives[sideNum] = new CCArchive("dark.cc", "dark", true);
		SearchMan.add("dark", _archives[sideNum]);
	}

	if (f.exists("intro.cc")) {
		_archives[2] = new CCArchive("intro.cc", "intro", true);
		SearchMan.add("intro", _archives[2]);
	}
}

bool CFilesManager::fileExists(const CString &name) {
	Common::File f;
	return f.exists(name);
}

bool Resources::exists(const Common::String &filename) const {
	Common::File f;
	return f.exists(filename) || _cache.isCached(filename);
}

bool FileManager::existFile(const Common::String &filename) {
	Common::File f;
	return f.exists(filename);
}

/**
 * Load Sprite Bank
 */
int AnimationManager::loadSpriteBank(int idx, const Common::String &filename) {
	int result = 0;
	Bank[idx]._loadedFl = true;
	Bank[idx]._filename = filename;

	byte *fileDataPtr = _vm->_fileIO->loadFile(filename);

	Bank[idx]._fileHeader = 0;
	if (fileDataPtr[1] == 'L' && fileDataPtr[2] == 'E')
		Bank[idx]._fileHeader = 1;
	else if (fileDataPtr[1] == 'O' && fileDataPtr[2] == 'R')
		Bank[idx]._fileHeader = 2;

	if (!Bank[idx]._fileHeader) {
		_vm->_globals->freeMemory(fileDataPtr);
		Bank[idx]._loadedFl = false;
		result = -1;
	}

	Bank[idx]._data = fileDataPtr;

	int objectDataIdx = 0;
	for(objectDataIdx = 0; objectDataIdx <= 249; objectDataIdx++) {
		int width = _vm->_objectsMan->getWidth(fileDataPtr, objectDataIdx);
		int height = _vm->_objectsMan->getHeight(fileDataPtr, objectDataIdx);
		if (!width && !height)
			break;
	}

	if (objectDataIdx > 249) {
		_vm->_globals->freeMemory(fileDataPtr);
		Bank[idx]._loadedFl = false;
		result = -2;
	}
	Bank[idx]._objDataIdx = objectDataIdx;

	Common::String ofsFilename = Bank[idx]._filename;
	char ch;
	do {
		ch = ofsFilename.lastChar();
		ofsFilename.deleteLastChar();
	} while (ch != '.');
	ofsFilename += ".OFS";

	Common::File f;
	if (f.exists(ofsFilename)) {
		byte *ofsData = _vm->_fileIO->loadFile(ofsFilename);
		byte *curOfsData = ofsData;
		for (int objIdx = 0; objIdx < Bank[idx]._objDataIdx; ++objIdx, curOfsData += 8) {
			int x1 = READ_LE_INT16(curOfsData);
			int y1 = READ_LE_INT16(curOfsData + 2);
			int x2 = READ_LE_INT16(curOfsData + 4);
			int y2 = READ_LE_INT16(curOfsData + 6);

			_vm->_objectsMan->setOffsetXY(Bank[idx]._data, objIdx, x1, y1, 0);
			if (Bank[idx]._fileHeader == 2)
				_vm->_objectsMan->setOffsetXY(Bank[idx]._data, objIdx, x2, y2, 1);
		}

		_vm->_globals->freeMemory(ofsData);
		result = 0;
	}

	return result;
}

/**
 * Check if a file is present
 */
bool FileManager::fileExists(const Common::String &file) {
	Common::File f;

	return f.exists(file);
}