C++ common::InSaveFile类代码示例

SaveGame *SaveGame::openForLoading(const Common::String &filename) {
	Common::InSaveFile *inSaveFile = g_system->getSavefileManager()->openForLoading(filename);
	if (!inSaveFile) {
		warning("SaveGame::openForLoading() Error opening savegame file %s", filename.c_str());
		return NULL;
	}

	SaveGame *save = new SaveGame();

	save->_saving = false;
	save->_inSaveFile = inSaveFile;

	uint32 tag = inSaveFile->readUint32BE();
	if (tag != SAVEGAME_HEADERTAG) {
		delete save;
		return NULL;
	}
	save->_majorVersion = inSaveFile->readUint32BE();
	save->_minorVersion = inSaveFile->readUint32BE();

	return save;
}

bool MystGameState::load(const Common::String &filename) {
	Common::InSaveFile *loadFile = _saveFileMan->openForLoading(filename);
	if (!loadFile)
		return false;

	debugC(kDebugSaveLoad, "Loading game from '%s'", filename.c_str());

	// First, let's make sure we're using a saved game file from this version of Myst
	// By checking length of file...
	int32 size = loadFile->size();
	if (size != 664 && size != 601) {
		warning("Incompatible saved game version");
		delete loadFile;
		return false;
	}

	Common::Serializer s(loadFile, nullptr);
	syncGameState(s, size == 664);
	delete loadFile;

	// Set Channelwood elevator state to down, because we start on the lower level
	_channelwood.elevatorState = 0;

	// Switch us back to the intro stack, to the linking book
	_vm->changeToStack(kIntroStack, 5, 0, 0);

	// Set our default cursor
	if (_globals.heldPage == 0 || _globals.heldPage > 13)
		_vm->setMainCursor(kDefaultMystCursor);
	else if (_globals.heldPage < 7)
		_vm->setMainCursor(kBluePageCursor);
	else if (_globals.heldPage < 13)
		_vm->setMainCursor(kRedPageCursor);
	else // if (globals.heldPage == 13)
		_vm->setMainCursor(kWhitePageCursor);

	return true;
}

SaveStateList DreamWebMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray files = saveFileMan->listSavefiles("DREAMWEB.D??");
	Common::sort(files.begin(), files.end());

	SaveStateList saveList;
	for(uint i = 0; i < files.size(); ++i) {
		const Common::String &file = files[i];
		Common::InSaveFile *stream = saveFileMan->openForLoading(file);
		if (!stream)
			error("cannot open save file %s", file.c_str());
		char name[17] = {};
		stream->seek(0x61);
		stream->read(name, sizeof(name) - 1);
		delete stream;

		int slotNum = atoi(file.c_str() + file.size() - 2);
		SaveStateDescriptor sd(slotNum, name);
		saveList.push_back(sd);
	}

	return saveList;
}

SaveStateDescriptor CGEMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String fileName = Common::String::format("%s.%03d", target, slot);
	Common::InSaveFile *f = g_system->getSavefileManager()->openForLoading(fileName);

	if (f) {
		CGE::SavegameHeader header;

		// Check to see if it's a ScummVM savegame or not
		char buffer[kSavegameStrSize + 1];
		f->read(buffer, kSavegameStrSize + 1);

		bool hasHeader = !strncmp(buffer, CGE::savegameStr, kSavegameStrSize + 1) &&
			CGE::CGEEngine::readSavegameHeader(f, header);
		delete f;

		if (!hasHeader) {
			// Original savegame perhaps?
			SaveStateDescriptor desc(slot, "Unknown");
			return desc;
		} else {
			// Create the return descriptor
			SaveStateDescriptor desc(slot, header.saveName);
			desc.setThumbnail(header.thumbnail);
			desc.setSaveDate(header.saveYear, header.saveMonth, header.saveDay);
			desc.setSaveTime(header.saveHour, header.saveMinutes);

			// Slot 0 is used for the 'automatic save on exit' save in Soltys, thus
			// we prevent it from being deleted or overwritten by accident.
			desc.setDeletableFlag(slot != 0);
			desc.setWriteProtectedFlag(slot == 0);

			return desc;
		}
	}

	return SaveStateDescriptor();
}

SaveStateDescriptor AgiMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	const uint32 AGIflag = MKTAG('A','G','I',':');
	Common::String fileName = Common::String::format("%s.%03d", target, slot);

	Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(fileName);

	if (in) {
		if (in->readUint32BE() != AGIflag) {
			delete in;
			return SaveStateDescriptor();
		}

		char name[32];
		in->read(name, 31);

		SaveStateDescriptor desc(slot, name);

		// Do not allow save slot 0 (used for auto-saving) to be deleted or
		// overwritten.
		desc.setDeletableFlag(slot != 0);
		desc.setWriteProtectedFlag(slot == 0);

		char saveVersion = in->readByte();
		if (saveVersion >= 4) {
			Graphics::Surface *const thumbnail = Graphics::loadThumbnail(*in);

			desc.setThumbnail(thumbnail);

			uint32 saveDate = in->readUint32BE();
			uint16 saveTime = in->readUint16BE();
			if (saveVersion >= 6) {
				uint32 playTime = in->readUint32BE();
				desc.setPlayTime(playTime * 1000);
			}

			int day = (saveDate >> 24) & 0xFF;
			int month = (saveDate >> 16) & 0xFF;
			int year = saveDate & 0xFFFF;

			desc.setSaveDate(year, month, day);

			int hour = (saveTime >> 8) & 0xFF;
			int minutes = saveTime & 0xFF;

			desc.setSaveTime(hour, minutes);
		}


		delete in;

		return desc;
	} else {

uint32 Sword2Engine::restoreData(uint16 slotNo, byte *buffer, uint32 bufferSize) {
	char *saveFileName = getSaveFileName(slotNo);

	Common::InSaveFile *in;

	if (!(in = _saveFileMan->openForLoading(saveFileName))) {
		// error: couldn't open file
		return SR_ERR_FILEOPEN;
	}

	// Read savegame into the buffer
	uint32 itemsRead = in->read(buffer, bufferSize);

	delete in;

	if (itemsRead != bufferSize) {
		// We didn't get all of it. At the moment we have no way of
		// knowing why, so assume that it's an incompatible savegame.

		return SR_ERR_INCOMPATIBLE;
	}

	return SR_OK;
}

SaveStateDescriptor HugoMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String fileName = Common::String::format("%s-%02d.SAV", target, slot);
	Common::InSaveFile *file = g_system->getSavefileManager()->openForLoading(fileName);

	if (file) {
		int saveVersion = file->readByte();

		if (saveVersion != kSavegameVersion) {
			warning("Savegame of incompatible version");
			delete file;
			return SaveStateDescriptor();
		}

		uint32 saveNameLength = file->readUint16BE();
		char saveName[256];
		file->read(saveName, saveNameLength);
		saveName[saveNameLength] = 0;

		SaveStateDescriptor desc(slot, saveName);

		Graphics::Surface *thumbnail = new Graphics::Surface();
		assert(thumbnail);
		if (!Graphics::loadThumbnail(*file, *thumbnail)) {
			delete thumbnail;
			thumbnail = 0;
		}
		desc.setThumbnail(thumbnail);

		desc.setDeletableFlag(true);
		desc.setWriteProtectedFlag(false);

		uint32 saveDate = file->readUint32BE();
		uint16 saveTime = file->readUint16BE();

		int day = (saveDate >> 24) & 0xFF;
		int month = (saveDate >> 16) & 0xFF;
		int year = saveDate & 0xFFFF;

		desc.setSaveDate(year, month, day);

		int hour = (saveTime >> 8) & 0xFF;
		int minutes = saveTime & 0xFF;

		desc.setSaveTime(hour, minutes);

		// Slot 0 is used for the 'restart game' save in all Hugo games, thus
		// we prevent it from being deleted.
		desc.setDeletableFlag(slot != 0);
		desc.setWriteProtectedFlag(slot == 0);

		delete file;
		return desc;
	}
	return SaveStateDescriptor();
}

SaveStateDescriptor GnapMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String fileName = Common::String::format("%s.%03d", target, slot);
	Common::InSaveFile *file = g_system->getSavefileManager()->openForLoading(fileName);
	if (file) {
		char saveIdentBuffer[5];
		file->read(saveIdentBuffer, 5);

		int32 version = file->readByte();
		if (version > GNAP_SAVEGAME_VERSION) {
			delete file;
			return SaveStateDescriptor();
		}

		Common::String saveName;
		char ch;
		while ((ch = (char)file->readByte()) != '\0')
			saveName += ch;

		SaveStateDescriptor desc(slot, saveName);

		if (version != 1) {
			Graphics::Surface *const thumbnail = Graphics::loadThumbnail(*file);
			desc.setThumbnail(thumbnail);
		}

		int year = file->readSint16LE();
		int month = file->readSint16LE();
		int day = file->readSint16LE();
		int hour = file->readSint16LE();
		int minutes = file->readSint16LE();

		desc.setSaveDate(year, month, day);
		desc.setSaveTime(hour, minutes);

		delete file;
		return desc;
	}

	return SaveStateDescriptor();
}

SaveStateDescriptor ToonMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String fileName = Common::String::format("%s.%03d", target, slot);
	Common::InSaveFile *file = g_system->getSavefileManager()->openForLoading(fileName);

	if (file) {

		int32 version = file->readSint32BE();
		if (version != TOON_SAVEGAME_VERSION) {
			delete file;
			return SaveStateDescriptor();
		}

		uint32 saveNameLength = file->readUint16BE();
		char saveName[256];
		file->read(saveName, saveNameLength);
		saveName[saveNameLength] = 0;

		SaveStateDescriptor desc(slot, saveName);

		Graphics::Surface *thumbnail = new Graphics::Surface();
		assert(thumbnail);
		if (!Graphics::loadThumbnail(*file, *thumbnail)) {
			delete thumbnail;
			thumbnail = 0;
		}
		desc.setThumbnail(thumbnail);

		desc.setDeletableFlag(true);
		desc.setWriteProtectedFlag(false);

		uint32 saveDate = file->readUint32BE();
		uint16 saveTime = file->readUint16BE();

		int day = (saveDate >> 24) & 0xFF;
		int month = (saveDate >> 16) & 0xFF;
		int year = saveDate & 0xFFFF;

		desc.setSaveDate(year, month, day);

		int hour = (saveTime >> 8) & 0xFF;
		int minutes = saveTime & 0xFF;

		desc.setSaveTime(hour, minutes);

		delete file;
		return desc;
	}

	return SaveStateDescriptor();
}

SaveStateList WageMetaEngine::listSaves(const char *target) const {
	const uint32 WAGEflag = MKTAG('W','A','G','E');
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	char saveDesc[128] = {0};
	Common::String pattern = target;
	pattern += ".###";

	filenames = saveFileMan->listSavefiles(pattern);

	SaveStateList saveList;
	for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {
		// Obtain the last 3 digits of the filename, since they correspond to the save slot
		int slotNum = atoi(file->c_str() + file->size() - 3);

		if (slotNum >= 0 && slotNum <= 999) {
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				saveDesc[0] = 0;
				in->seek(in->size() - 8);
				uint32 offset = in->readUint32BE();
				uint32 type = in->readUint32BE();
				if (type == WAGEflag) {
					in->seek(offset);

					type = in->readUint32BE();
					if (type == WAGEflag) {
						in->read(saveDesc, 127);
					}
				}
				saveList.push_back(SaveStateDescriptor(slotNum, saveDesc));
				delete in;
			}
		}
	}

	// Sort saves based on slot number.
	Common::sort(saveList.begin(), saveList.end(), SaveStateDescriptorSlotComparator());
	return saveList;
}

SaveStateDescriptor AgiMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	const uint32 AGIflag = MKTAG('A','G','I',':');
	char fileName[MAXPATHLEN];
	sprintf(fileName, "%s.%03d", target, slot);

	Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(fileName);

	if (in) {
		if (in->readUint32BE() != AGIflag) {
			delete in;
			return SaveStateDescriptor();
		}

		char name[32];
		in->read(name, 31);

		SaveStateDescriptor desc(slot, name);

		desc.setDeletableFlag(slot != 0);
		desc.setWriteProtectedFlag(slot == 0);

		char saveVersion = in->readByte();
		if (saveVersion >= 4) {
			Graphics::Surface *const thumbnail = Graphics::loadThumbnail(*in);

			desc.setThumbnail(thumbnail);

			uint32 saveDate = in->readUint32BE();
			uint16 saveTime = in->readUint16BE();

			int day = (saveDate >> 24) & 0xFF;
			int month = (saveDate >> 16) & 0xFF;
			int year = saveDate & 0xFFFF;

			desc.setSaveDate(year, month, day);

			int hour = (saveTime >> 8) & 0xFF;
			int minutes = saveTime & 0xFF;

			desc.setSaveTime(hour, minutes);

			// TODO: played time
		}


		delete in;

		return desc;
	}

int16 GameDatabaseV3::loadgame(const char *filename, int16 version) {
	Common::InSaveFile *in;
	uint32 expectedSize = 4 + 4 + 2 + _gameStateSize;

	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
		warning("Can't open file '%s', game not loaded", filename);
		return 1;
	}

	uint32 header = in->readUint32BE();
	if (header != MKTAG('S','G','A','M')) {
		warning("Save game header missing");
		delete in;
		return 1;
	}

	uint32 size = in->readUint32LE();
	int16 saveVersion = in->readUint16LE();

	if (saveVersion != version) {
		warning("Save game %s was saved with a different version of the game. Game version is %d, save version is %d", filename, version, saveVersion);
		delete in;
		return 1;
	}

	if (size != expectedSize) {
		warning("Unexpected save game size. Expected %d, size is %d", expectedSize, size);
		delete in;
		return 1;
	}

	in->skip(64); // skip savegame description
	in->read(_gameState, _gameStateSize);
	delete in;

	_objectPropertyCache.clear();	// make sure to clear cache

	return 0;
}

void ToltecsEngine::loadgame(const char *filename) {
	Common::InSaveFile *in;
	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
		warning("Can't open file '%s', game not loaded", filename);
		return;
	}

	SaveHeader header;

	kReadSaveHeaderError errorCode = readSaveHeader(in, false, header);
	
	if (errorCode != kRSHENoError) {
		warning("Error loading savegame '%s'", filename);
		delete in;
		return;
	}
	
	_sound->stopAll();
	_music->stopSequence();
	g_engine->setTotalPlayTime(header.playTime * 1000);

	_cameraX = in->readUint16LE();
	_cameraY = in->readUint16LE();
	_cameraHeight = in->readUint16LE();

	_guiHeight = in->readUint16LE();

	_sceneWidth = in->readUint16LE();
	_sceneHeight = in->readUint16LE();
	_sceneResIndex = in->readUint32LE();

	_walkSpeedX = in->readUint16LE();
	_walkSpeedY = in->readUint16LE();

	_counter01 = in->readUint32LE();
	_counter02 = in->readUint32LE();
	_movieSceneFlag = in->readByte() != 0;
	_flag01 = in->readByte();

	_mouseX = in->readUint16LE();
	_mouseY = in->readUint16LE();
	_mouseDisabled = in->readUint16LE();
	
	_system->warpMouse(_mouseX, _mouseY);
 	_system->showMouse(_mouseDisabled == 0);

	_palette->loadState(in);
	_script->loadState(in);
	_anim->loadState(in);
	_screen->loadState(in);
	if (header.version >= 2)
		_sound->loadState(in);
	if (header.version >= 3)
		_music->loadState(in);

	delete in;

	loadScene(_sceneResIndex);

	_newCameraX = _cameraX;
	_newCameraY = _cameraY;
}

bool CGEEngine::loadGame(int slotNumber, SavegameHeader *header, bool tiny) {
	debugC(1, kCGEDebugEngine, "CGEEngine::loadgame(%d, header, %s)", slotNumber, tiny ? "true" : "false");

	Common::MemoryReadStream *readStream;
	SavegameHeader saveHeader;

	if (slotNumber == -1) {
		// Loading the data for the initial game state
		EncryptedStream file = EncryptedStream(this, kSavegame0Name);
		int size = file.size();
		byte *dataBuffer = (byte *)malloc(size);
		file.read(dataBuffer, size);
		readStream = new Common::MemoryReadStream(dataBuffer, size, DisposeAfterUse::YES);

	} else {
		// Open up the savegame file
		Common::String slotName = generateSaveName(slotNumber);
		Common::InSaveFile *saveFile = g_system->getSavefileManager()->openForLoading(slotName);

		// Read the data into a data buffer
		int size = saveFile->size();
		byte *dataBuffer = (byte *)malloc(size);
		saveFile->read(dataBuffer, size);
		readStream = new Common::MemoryReadStream(dataBuffer, size, DisposeAfterUse::YES);
		delete saveFile;
	}

	// Check to see if it's a ScummVM savegame or not
	char buffer[kSavegameStrSize + 1];
	readStream->read(buffer, kSavegameStrSize + 1);

	if (strncmp(buffer, savegameStr, kSavegameStrSize + 1) != 0) {
		// It's not, so rewind back to the start
		readStream->seek(0);

		if (header)
			// Header wanted where none exists, so return false
			return false;
	} else {
		// Found header
		if (!readSavegameHeader(readStream, saveHeader)) {
			delete readStream;
			return false;
		}

		if (header) {
			*header = saveHeader;
			delete readStream;
			return true;
		}

		// Delete the thumbnail
		saveHeader.thumbnail->free();
		delete saveHeader.thumbnail;
	}

	// Get in the savegame
	syncGame(readStream, NULL, tiny);

	delete readStream;
	return true;
}

void AGOSEngine_Feeble::listSaveGames(int n) {
	char b[108];
	Common::InSaveFile *in;
	uint16 j, k, z, maxFiles;
	int OK;
	memset(b, 0, 108);

	maxFiles = countSaveGames() - 1;
	j = maxFiles - n + 1;
	k = maxFiles - j + 1;
	z = maxFiles;
	if (getBitFlag(95)) {
		j++;
		z++;
	}

	while (!shouldQuit()) {
		OK = 1;
		if (getBitFlag(93) || getBitFlag(94)) {
			OK = 0;
			if (j > z)
				break;
		}

		if (getBitFlag(93)) {
			if (((_newLines + 1) >= _textWindow->scrollY) && ((_newLines + 1) < (_textWindow->scrollY + 3)))
				OK = 1;
		}

		if (getBitFlag(94)) {
			if ((_newLines + 1) == (_textWindow->scrollY + 7))
				OK = 1;
		}


		if (OK == 1) {
			if (j == maxFiles + 1) {
				showMessageFormat("\n");
				hyperLinkOn(j + 400);
				setTextColor(116);
				showMessageFormat(" %d. ", 1);
				hyperLinkOff();
				setTextColor(113);
				k++;
				j--;
			}

			if (!(in = _saveFileMan->openForLoading(genSaveName(j))))
				break;
			in->read(b, 100);
			delete in;
		}

		showMessageFormat("\n");
		hyperLinkOn(j + 400);
		setTextColor(116);
		if (k < 10)
			showMessageFormat(" ");
		showMessageFormat("%d. ", k);
		setTextColor(113);
		showMessageFormat("%s ", b);
		hyperLinkOff();
		j--;
		k++;
	}
}