File: metaengine.cpp

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/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/system.h"
#include "mm/xeen/metaengine.h"
#include "mm/xeen/events.h"
#include "mm/xeen/saves.h"

namespace MM {
namespace Xeen {

#define MAX_SAVES 999

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

	if (f) {
		XeenSavegameHeader header;
		if (!SavesManager::readSavegameHeader(f, header, false)) {
			delete f;
			return SaveStateDescriptor();
		}

		delete f;

		// Create the return descriptor
		SaveStateDescriptor desc(metaEngine, slot, header._saveName);
		desc.setThumbnail(header._thumbnail);
		desc.setSaveDate(header._year, header._month, header._day);
		desc.setSaveTime(header._hour, header._minute);
		desc.setPlayTime(header._totalFrames * GAME_FRAME_TIME);

		return desc;
	}

	return SaveStateDescriptor();
}

SaveStateList XeenMetaEngine::listSaves(const MetaEngine *metaEngine, const char *target) {
	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
	Common::StringArray filenames;
	Common::String saveDesc;
	Common::String pattern = Common::String::format("%s.###", target);
	MM::Xeen::XeenSavegameHeader header;

	filenames = saveFileMan->listSavefiles(pattern);

	SaveStateList saveList;
	for (Common::StringArray::const_iterator file = filenames.begin(); file != filenames.end(); ++file) {
		const char *ext = strrchr(file->c_str(), '.');
		int slot = ext ? atoi(ext + 1) : -1;

		if (slot >= 0 && slot <= MAX_SAVES) {
			Common::InSaveFile *in = g_system->getSavefileManager()->openForLoading(*file);

			if (in) {
				if (MM::Xeen::SavesManager::readSavegameHeader(in, header))
					saveList.push_back(SaveStateDescriptor(metaEngine, slot, header._saveName));

				delete in;
			}
		}
	}

	Common::sort(saveList.begin(), saveList.end(), SaveStateDescriptorSlotComparator());
	return saveList;
}

} // End of namespace Xeen
} // End of namespace MM