/* 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#ifndef CRUISE_SAVELOAD_H
#define CRUISE_SAVELOAD_H

#include "common/scummsys.h"
#include "common/savefile.h"

namespace Cruise {

/* TODO: This code is copied verbatim from the Tinsel engine, and in turn was derived from
 * the SCUMM engine. As such it should probably be brought into the common codebase
 */
#define SYNC_AS(SUFFIX,TYPE,SIZE) \
	template <class T> \
	void syncAs ## SUFFIX(T &val) { \
		if (_loadStream) \
			val = static_cast<T>(_loadStream->read ## SUFFIX()); \
		else { \
			TYPE tmp = val; \
			_saveStream->write ## SUFFIX(tmp); \
		} \
		_bytesSynced += SIZE; \
	}


class Serializer {
public:
	Serializer(Common::SeekableReadStream *in, Common::OutSaveFile *out)
		: _loadStream(in), _saveStream(out), _bytesSynced(0) {
		assert(in || out);
	}

	bool isSaving() { return (_saveStream != 0); }
	bool isLoading() { return (_loadStream != 0); }

	uint bytesSynced() const { return _bytesSynced; }

	void syncBytes(byte *buf, uint16 size) {
		if (_loadStream)
			_loadStream->read(buf, size);
		else
			_saveStream->write(buf, size);
		_bytesSynced += size;
	}

	void syncString(char *buf, uint16 size) {
		syncBytes((byte *)buf, size);
	}

	SYNC_AS(Byte, byte, 1)

	SYNC_AS(Uint16LE, uint16, 2)
	SYNC_AS(Uint16BE, uint16, 2)
	SYNC_AS(Sint16LE, int16, 2)
	SYNC_AS(Sint16BE, int16, 2)

	SYNC_AS(Uint32LE, uint32, 4)
	SYNC_AS(Uint32BE, uint32, 4)
	SYNC_AS(Sint32LE, int32, 4)
	SYNC_AS(Sint32BE, int32, 4)

protected:
	Common::SeekableReadStream *_loadStream;
	Common::OutSaveFile *_saveStream;

	uint _bytesSynced;
};

#undef SYNC_AS




int saveSavegameData(int saveGameIdx);
int loadSavegameData(int saveGameIdx);

} // End of namespace Cruise

#endif