C++ InSaveFile::readUint32BE方法代码示例

SaveStateDescriptor SwordMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String fileName = Common::String::format("sword1.%03d", slot);
	char name[40];
	uint32 playTime = 0;
	byte versionSave;

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

	if (in) {
		in->skip(4);        // header
		in->read(name, sizeof(name));
		in->read(&versionSave, 1);      // version

		SaveStateDescriptor desc(slot, name);

		if (versionSave < 2) // These older version of the savegames used a flag to signal presence of thumbnail
			in->skip(1);

		if (Graphics::checkThumbnailHeader(*in)) {
			Graphics::Surface *thumbnail;
			if (!Graphics::loadThumbnail(*in, thumbnail)) {
				delete in;
				return SaveStateDescriptor();
			}
			desc.setThumbnail(thumbnail);
		}

		uint32 saveDate = in->readUint32BE();
		uint16 saveTime = in->readUint16BE();
		if (versionSave > 1) // Previous versions did not have playtime data
			playTime = in->readUint32BE();

		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);

		if (versionSave > 1) {
			desc.setPlayTime(playTime * 1000);
		} else { //We have no playtime data
			desc.setPlayTime(0);
		}

		delete in;

		return desc;
	}

	return SaveStateDescriptor();
}

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

	if (!inFile)
		return SaveStateDescriptor();

	if (inFile->readUint32BE() != MKTAG('A', 'D', 'L', ':')) {
		delete inFile;
		return SaveStateDescriptor();
	}

	byte saveVersion = inFile->readByte();
	if (saveVersion != SAVEGAME_VERSION) {
		delete inFile;
		return SaveStateDescriptor();
	}

	char name[SAVEGAME_NAME_LEN] = { };
	inFile->read(name, sizeof(name) - 1);
	inFile->readByte();

	if (inFile->eos() || inFile->err()) {
		delete inFile;
		return SaveStateDescriptor();
	}

	SaveStateDescriptor sd(slot, name);

	int year = inFile->readUint16BE();
	int month = inFile->readByte();
	int day = inFile->readByte();
	sd.setSaveDate(year + 1900, month + 1, day);

	int hour = inFile->readByte();
	int minutes = inFile->readByte();
	sd.setSaveTime(hour, minutes);

	uint32 playTime = inFile->readUint32BE();
	sd.setPlayTime(playTime);

	if (inFile->eos() || inFile->err()) {
		delete inFile;
		return SaveStateDescriptor();
	}

	Graphics::Surface *thumbnail;
	if (!Graphics::loadThumbnail(*inFile, thumbnail)) {
		delete inFile;
		return SaveStateDescriptor();
	}
	sd.setThumbnail(thumbnail);

	delete inFile;
	return sd;
}

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);

		// 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);

			// TODO: played time
		}


		delete in;

		return desc;
	} else {

SaveStateList SagaMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	char saveDesc[SAVE_TITLE_SIZE];
	Common::String pattern = target;
	pattern += ".s##";

	filenames = saveFileMan->listSavefiles(pattern);

	SaveStateList saveList;
	int slotNum = 0;
	for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {
		// Obtain the last 2 digits of the filename, since they correspond to the save slot
		slotNum = atoi(file->c_str() + file->size() - 2);

		if (slotNum >= 0 && slotNum < MAX_SAVES) {
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				for (int i = 0; i < 3; i++)
					in->readUint32BE();
				in->read(saveDesc, SAVE_TITLE_SIZE);
				saveList.push_back(SaveStateDescriptor(slotNum, saveDesc));
				delete in;
			}
		}
	}

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

void AgiEngine::getSavegameDescription(int num, char *buf, bool showEmpty) {
	Common::InSaveFile *in;
	Common::String fileName = getSavegameFilename(num);

	debugC(4, kDebugLevelMain | kDebugLevelSavegame, "Current game id is %s", _targetName.c_str());

	if (!(in = _saveFileMan->openForLoading(fileName))) {
		debugC(4, kDebugLevelMain | kDebugLevelSavegame, "File %s does not exist", fileName.c_str());

		if (showEmpty)
			strcpy(buf, "        (empty slot)");
		else
			*buf = 0;
	} else {
		debugC(4, kDebugLevelMain | kDebugLevelSavegame, "Successfully opened %s for reading", fileName.c_str());

		uint32 type = in->readUint32BE();

		if (type == AGIflag) {
			debugC(6, kDebugLevelMain | kDebugLevelSavegame, "Has AGI flag, good start");
			in->read(buf, 31);
		} else {
			warning("This doesn't appear to be an AGI savegame");
			strcpy(buf, "(corrupt file)");
		}

		delete in;
	}
}

bool GameDatabaseV3::getSavegameDescription(const char *filename, Common::String &description, int16 version) {
	Common::InSaveFile *in;
	char desc[64];

	if (!(in = g_system->getSavefileManager()->openForLoading(filename))) {
		return false;
	}

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

	int32 size = in->readUint32LE();
	if (size != in->size() - 64) {
		warning("Unexpected save game size. Expected %d, size is %d (file size - 64)", size, in->size() - 64);
		delete in;
		return false;
	}

	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 false;
	}

	in->read(desc, 64);
	description = desc;

	delete in;
	return true;
}

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[31];
    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) {
                uint32 type = in->readUint32BE();
                if (type == WAGEflag)
                    in->read(saveDesc, 31);
                saveList.push_back(SaveStateDescriptor(slotNum, saveDesc));
                delete in;
            }
        }
    }

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

SaveStateDescriptor DreamWebMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
	Common::String filename = Common::String::format("DREAMWEB.D%02d", slot);
	Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(filename.c_str());

	if (in) {
		DreamWeb::FileHeader header;
		in->read((uint8 *)&header, sizeof(DreamWeb::FileHeader));

		Common::String saveName;
		byte descSize = header.len(0);
		byte i;

		for (i = 0; i < descSize; i++)
			saveName += (char)in->readByte();

		SaveStateDescriptor desc(slot, saveName);

		// Check if there is a ScummVM data block
		if (header.len(6) == SCUMMVM_BLOCK_MAGIC_SIZE) {
			// Skip the game data
			for (i = 1; i <= 5; i++)
				in->skip(header.len(i));

			uint32 tag = in->readUint32BE();
			if (tag != SCUMMVM_HEADER) {
				warning("ScummVM data block found, but the block header is incorrect - skipping");
				delete in;
				return desc;
			}

			byte version = in->readByte();
			if (version > SAVEGAME_VERSION) {
				warning("ScummVM data block found, but it has been saved with a newer version of ScummVM - skipping");
				delete in;
				return desc;
			}

			uint32 saveDate = in->readUint32LE();
			uint32 saveTime = in->readUint32LE();
			uint32 playTime = in->readUint32LE();
			Graphics::Surface *thumbnail = Graphics::loadThumbnail(*in);

			int day = (saveDate >> 24) & 0xFF;
			int month = (saveDate >> 16) & 0xFF;
			int year = saveDate & 0xFFFF;
			int hour = (saveTime >> 16) & 0xFF;
			int minutes = (saveTime >> 8) & 0xFF;

			desc.setSaveDate(year, month, day);
			desc.setSaveTime(hour, minutes);
			desc.setPlayTime(playTime * 1000);
			desc.setThumbnail(thumbnail);
		}

		delete in;
		return desc;
	}

	return SaveStateDescriptor();
}

static byte *readSavegameThumbnail(const Common::String &filename, uint &fileSize, bool &isPNG) {
	byte *pFileData;
	Common::SaveFileManager *sfm = g_system->getSavefileManager();
	Common::InSaveFile *file = sfm->openForLoading(lastPathComponent(filename, '/'));
	if (!file)
		error("Save file \"%s\" could not be loaded.", filename.c_str());

	// Seek to the actual PNG image
	loadString(*file);		// Marker (BS25SAVEGAME)
	Common::String storedVersionID = loadString(*file);		// Version
	if (storedVersionID != "SCUMMVM1")
		loadString(*file);

	loadString(*file);		// Description
	uint32 compressedGamedataSize = atoi(loadString(*file).c_str());
	loadString(*file);		// Uncompressed game data size
	file->skip(compressedGamedataSize);	// Skip the game data and move to the thumbnail itself
	uint32 thumbnailStart = file->pos();

	fileSize = file->size() - thumbnailStart;

	// Check if the thumbnail is in our own format, or a PNG file.
	uint32 header = file->readUint32BE();
	isPNG = (header != MKTAG('S','C','R','N'));
	file->seek(-4, SEEK_CUR);

	pFileData = new byte[fileSize];
	file->read(pFileData, fileSize);
	delete file;

	return pFileData;
}

SaveStateList AgiMetaEngine::listSaves(const char *target) const {
	const uint32 AGIflag = MKTAG('A','G','I',':');
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	char saveDesc[31];
	Common::String pattern = target;
	pattern += ".???";

	filenames = saveFileMan->listSavefiles(pattern);
	sort(filenames.begin(), filenames.end());	// Sort (hopefully ensuring we are sorted numerically..)

	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) {
				uint32 type = in->readUint32BE();
				if (type == AGIflag)
					in->read(saveDesc, 31);
				saveList.push_back(SaveStateDescriptor(slotNum, saveDesc));
				delete in;
			}
		}
	}

	return saveList;
}

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();
	assert(tag == SAVEGAME_HEADERTAG);
	save->_version = inSaveFile->readUint32BE();

	return save;
}

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();
}

void SagaEngine::fillSaveList() {

	int i;
	Common::InSaveFile *in;
	Common::StringArray filenames;
	char slot[3];
	int slotNumber;
	char *name;

	name = calcSaveFileName(MAX_SAVES);
	name[strlen(name) - 2] = '*';
	name[strlen(name) - 1] = 0;

	filenames = _saveFileMan->listSavefiles(name);

	for (i = 0; i < MAX_SAVES; i++) {
		_saveFiles[i].name[0] = 0;
		_saveFiles[i].slotNumber = (uint)-1;
	}

	_saveFilesCount = 0;

	for (Common::StringArray::iterator file = filenames.begin(); file != filenames.end(); ++file){
		//Obtain the last 2 digits of the filename, since they correspond to the save slot
		slot[0] = file->c_str()[file->size()-2];
		slot[1] = file->c_str()[file->size()-1];
		slot[2] = 0;

		slotNumber = atoi(slot);
		if (slotNumber >= 0 && slotNumber < MAX_SAVES) {
			name = calcSaveFileName(slotNumber);
			if ((in = _saveFileMan->openForLoading(name)) != NULL) {
				_saveHeader.type = in->readUint32BE();
				_saveHeader.size = in->readUint32LE();
				_saveHeader.version = in->readUint32LE();
				in->read(_saveHeader.name, sizeof(_saveHeader.name));

				if (_saveHeader.type != MKTAG('S','A','G','A')) {
					warning("SagaEngine::load wrong save %s format", name);
					i++;
					continue;
				}
				strcpy(_saveFiles[_saveFilesCount].name, _saveHeader.name);
				_saveFiles[_saveFilesCount].slotNumber = slotNumber;
				delete in;
				_saveFilesCount++;
			}
		}
	}

	qsort(_saveFiles, _saveFilesCount, sizeof(_saveFiles[0]), compareSaveFileData);
}

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 AdlMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray files = saveFileMan->listSavefiles(Common::String(target) + ".s##");

	SaveStateList saveList;

	for (uint i = 0; i < files.size(); ++i) {
		const Common::String &fileName = files[i];
		Common::InSaveFile *inFile = saveFileMan->openForLoading(fileName);
		if (!inFile) {
			warning("Cannot open save file '%s'", fileName.c_str());
			continue;
		}

		if (inFile->readUint32BE() != MKTAG('A', 'D', 'L', ':')) {
			warning("No header found in '%s'", fileName.c_str());
			delete inFile;
			continue;
		}

		byte saveVersion = inFile->readByte();
		if (saveVersion != SAVEGAME_VERSION) {
			warning("Unsupported save game version %i found in '%s'", saveVersion, fileName.c_str());
			delete inFile;
			continue;
		}

		char name[SAVEGAME_NAME_LEN] = { };
		inFile->read(name, sizeof(name) - 1);
		delete inFile;

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

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