C++ SaveFileManager::openForLoading方法代码示例

SaveStateList SkyMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	SaveStateList saveList;

	// Load the descriptions
	Common::StringArray savenames;
	savenames.resize(MAX_SAVE_GAMES+1);

	Common::InSaveFile *inf;
	inf = saveFileMan->openForLoading("SKY-VM.SAV");
	if (inf != NULL) {
		char *tmpBuf =  new char[MAX_SAVE_GAMES * MAX_TEXT_LEN];
		char *tmpPtr = tmpBuf;
		inf->read(tmpBuf, MAX_SAVE_GAMES * MAX_TEXT_LEN);
		for (int i = 0; i < MAX_SAVE_GAMES; ++i) {
			savenames[i] = tmpPtr;
			tmpPtr += savenames[i].size() + 1;
		}
		delete inf;
		delete[] tmpBuf;
	}

	// Find all saves
	Common::StringArray filenames;
	filenames = saveFileMan->listSavefiles("SKY-VM.???");
	sort(filenames.begin(), filenames.end());	// Sort (hopefully ensuring we are sorted numerically..)

	// Slot 0 is the autosave, if it exists.
	// TODO: Check for the existence of the autosave -- but this require us
	// to know which SKY variant we are looking at.
	saveList.insert_at(0, SaveStateDescriptor(0, "*AUTOSAVE*"));

	// Prepare the list of savestates by looping over all matching savefiles
	for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {
		// Extract the extension
		Common::String ext = file->c_str() + file->size() - 3;
		ext.toUppercase();
		if (Common::isDigit(ext[0]) && Common::isDigit(ext[1]) && Common::isDigit(ext[2])) {
			int slotNum = atoi(ext.c_str());
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				saveList.push_back(SaveStateDescriptor(slotNum+1, savenames[slotNum]));
				delete in;
			}
		}
	}

	return saveList;
}

reg_t kCheckSaveGame(EngineState *s, int funct_nr, int argc, reg_t *argv) {
	char *game_id = kernel_dereference_char_pointer(s, argv[0], 0);
	int savedir_nr = argv[1].toUint16();

	debug(3, "kCheckSaveGame(%s, %d)", game_id, savedir_nr);

	Common::Array<SavegameDesc> saves;
	listSavegames(saves);

	savedir_nr = saves[savedir_nr].id;

	if (savedir_nr > MAX_SAVEGAME_NR - 1) {
		return NULL_REG;
	}

	Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();
	Common::String filename = ((Sci::SciEngine*)g_engine)->getSavegameName(savedir_nr);
	Common::SeekableReadStream *in;
	if ((in = saveFileMan->openForLoading(filename))) {
		// found a savegame file

		SavegameMetadata meta;
		if (!get_savegame_metadata(in, &meta)) {
			// invalid
			s->r_acc = make_reg(0, 0);
		} else {
			s->r_acc = make_reg(0, 1);
		}
		delete in;
	} else {
		s->r_acc = make_reg(0, 1);
	}

	return s->r_acc;
}

void listSavegames(Common::Array<SavegameDesc> &saves) {
	Common::SaveFileManager *saveFileMan = g_engine->getSaveFileManager();

	// Load all saves
	Common::StringList saveNames = saveFileMan->listSavefiles(((SciEngine *)g_engine)->getSavegamePattern());

	for (Common::StringList::const_iterator iter = saveNames.begin(); iter != saveNames.end(); ++iter) {
		Common::String filename = *iter;
		Common::SeekableReadStream *in;
		if ((in = saveFileMan->openForLoading(filename))) {
			SavegameMetadata meta;
			if (!get_savegame_metadata(in, &meta)) {
				// invalid
				delete in;
				continue;
			}
			delete in;

			SavegameDesc desc;
			desc.id = strtol(filename.end() - 3, NULL, 10);
			desc.date = meta.savegame_date;
			desc.time = meta.savegame_time;
			debug(3, "Savegame in file %s ok, id %d", filename.c_str(), desc.id);

			saves.push_back(desc);
		}
	}

	// Sort the list by creation date of the saves
	qsort(saves.begin(), saves.size(), sizeof(SavegameDesc), _savegame_index_struct_compare);
}

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;
}

SaveStateList DraciMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	Common::String pattern("draci.s##");

	filenames = saveFileMan->listSavefiles(pattern);

	SaveStateList saveList;
	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
		int slotNum = atoi(file->c_str() + file->size() - 2);

		if (slotNum >= 0 && slotNum <= 99) {
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				Draci::DraciSavegameHeader header;
				if (Draci::readSavegameHeader(in, header)) {
					saveList.push_back(SaveStateDescriptor(slotNum, header.saveName));
				}
				delete in;
			}
		}
	}

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

SaveStateList LureMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	Common::String saveDesc;
	Common::String pattern = "lure.???";

	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) {
				saveDesc = Lure::getSaveName(in);
				saveList.push_back(SaveStateDescriptor(slotNum, saveDesc));
				delete in;
			}
		}
	}

	return saveList;
}

void Lua_V1::TextFileGetLine() {
	char textBuf[1000];
	lua_Object nameObj = lua_getparam(1);
	lua_Object posObj = lua_getparam(2);
	Common::SeekableReadStream *file;

	if (lua_isnil(nameObj) || lua_isnil(posObj)) {
		lua_pushnil();
		return;
	}

	const char *filename = lua_getstring(nameObj);
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	file = saveFileMan->openForLoading(filename);
	if (!file) {
		lua_pushnil();
		return;
	}

	int pos = (int)lua_getnumber(posObj);
	file->seek(pos, SEEK_SET);
	memset(textBuf, 0, 1000);
	file->readLine(textBuf, 1000);
	delete file;

	lua_pushstring(textBuf);
}

SaveStateList LabMetaEngine::listSaves(const char *target) const {
    Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
    Lab::SaveGameHeader header;
    Common::String pattern = target;
    pattern += ".###";

    Common::StringArray filenames;
    filenames = saveFileMan->listSavefiles(pattern.c_str());
    Common::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->c_str());
            if (in) {
                if (Lab::readSaveGameHeader(in, header))
                    saveList.push_back(SaveStateDescriptor(slotNum, header._descr.getDescription()));
                delete in;
            }
        }
    }

    return saveList;
}

SaveStateList DrasculaMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	Common::String pattern = target;
	pattern += ".###";

	filenames = saveFileMan->listSavefiles(pattern);

	SaveStateList saveList;
	int slotNum = 0;
	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
		slotNum = atoi(file->c_str() + file->size() - 3);

		if (slotNum >= 0 && slotNum <= getMaximumSaveSlot()) {
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				SaveStateDescriptor desc = loadMetaData(in, slotNum, false);
				if (desc.getSaveSlot() != slotNum) {
					// invalid
					delete in;
					continue;
				}
				saveList.push_back(desc);
				delete in;
			}
		}
	}

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

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;
}

int MenuSystem::loadSavegamesList() {
	int maxSlotNum = -1;

	_savegameListTopIndex = 0;
	_savegames.clear();

	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Toltecs::ToltecsEngine::SaveHeader header;
	Common::String pattern = _vm->getTargetName();
	pattern += ".???";

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

	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 > maxSlotNum)
			maxSlotNum = slotNum;

		if (slotNum >= 0 && slotNum <= 999) {
			Common::InSaveFile *in = saveFileMan->openForLoading(file->c_str());
			if (in) {
				if (Toltecs::ToltecsEngine::readSaveHeader(in, false, header) == Toltecs::ToltecsEngine::kRSHENoError) {
					_savegames.push_back(SavegameItem(slotNum, header.description));
					//debug("%s -> %s", file->c_str(), header.description.c_str());
				}
				delete in;
			}
		}
	}

	return maxSlotNum;
}

Common::InSaveFile *SaveReader::openSave(const Common::String &fileName) {
	if (fileName.empty())
		return 0;

	Common::SaveFileManager *saveMan = g_system->getSavefileManager();
	return saveMan->openForLoading(fileName);
}

SaveStateList SciMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	Common::String pattern = target;
	pattern += ".???";

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

	SaveStateList saveList;
	int slotNum = 0;
	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
		slotNum = atoi(file->c_str() + file->size() - 3);

		if (slotNum >= 0 && slotNum <= 99) {
			Common::InSaveFile *in = saveFileMan->openForLoading(*file);
			if (in) {
				SavegameMetadata meta;
				if (!get_savegame_metadata(in, &meta)) {
					// invalid
					delete in;
					continue;
				}
				saveList.push_back(SaveStateDescriptor(slotNum, meta.name));
				delete in;
			}
		}
	}

	return saveList;
}

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;
}

SaveStateList KyraMetaEngine::listSaves(const char *target) const {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Kyra::KyraEngine_v1::SaveHeader header;
	Common::String pattern = target;
	pattern += ".???";

	Common::StringArray filenames;
	filenames = saveFileMan->listSavefiles(pattern);
	Common::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) {
				if (Kyra::KyraEngine_v1::readSaveHeader(in, false, header) == Kyra::KyraEngine_v1::kRSHENoError) {
					// WORKAROUND: Old savegames are using 'German' as description for kyra3 restart game save (slot 0),
					// since that looks odd we replace it by "New Game".
					if (slotNum == 0 && header.gameID == Kyra::GI_KYRA3)
						header.description = "New Game";

					saveList.push_back(SaveStateDescriptor(slotNum, header.description));
				}
				delete in;
			}
		}
	}

	return saveList;
}