mirror of
https://github.com/libretro/scummvm.git
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132 lines
3.4 KiB
C++
132 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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* Handles timers.
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*/
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#ifndef TINSEL_SERIALIZER_H
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#define TINSEL_SERIALIZER_H
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#include "common/scummsys.h"
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#include "common/savefile.h"
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namespace Tinsel {
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#define SYNC_AS(SUFFIX,TYPE,SIZE) \
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template <class T> \
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void syncAs ## SUFFIX(T &val) { \
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if (_loadStream) \
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val = static_cast<T>(_loadStream->read ## SUFFIX()); \
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else { \
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TYPE tmp = val; \
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_saveStream->write ## SUFFIX(tmp); \
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} \
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_bytesSynced += SIZE; \
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}
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// TODO: Write comment for this
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// TODO: Inspired by the SCUMM engine -- move to common/ code and use in more engines?
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class Serializer {
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public:
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Serializer(Common::SeekableReadStream *in, Common::OutSaveFile *out)
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: _loadStream(in), _saveStream(out), _bytesSynced(0) {
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assert(in || out);
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}
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bool isSaving() { return (_saveStream != 0); }
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bool isLoading() { return (_loadStream != 0); }
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uint bytesSynced() const { return _bytesSynced; }
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void syncBytes(byte *buf, uint16 size) {
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if (_loadStream)
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_loadStream->read(buf, size);
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else
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_saveStream->write(buf, size);
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_bytesSynced += size;
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}
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SYNC_AS(Byte, byte, 1)
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SYNC_AS(Uint16LE, uint16, 2)
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SYNC_AS(Uint16BE, uint16, 2)
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SYNC_AS(Sint16LE, int16, 2)
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SYNC_AS(Sint16BE, int16, 2)
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SYNC_AS(Uint32LE, uint32, 4)
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SYNC_AS(Uint32BE, uint32, 4)
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SYNC_AS(Sint32LE, int32, 4)
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SYNC_AS(Sint32BE, int32, 4)
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protected:
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Common::SeekableReadStream *_loadStream;
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Common::OutSaveFile *_saveStream;
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uint _bytesSynced;
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};
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#undef SYNC_AS
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// TODO: Make a subclass "VersionedSerializer", which makes it easy to support
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// multiple versions of a savegame format (again inspired by SCUMM).
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/*
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class VersionedSerializer : public Serializer {
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public:
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// "version" is the version of the savegame we are loading/creating
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VersionedSerializer(Common::SeekableReadStream *in, Common::OutSaveFile *out, int version)
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: Serializer(in, out), _version(version) {
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assert(in || out);
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}
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void syncBytes(byte *buf, uint16 size, int minVersion = 0, int maxVersion = INF) {
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if (_version < minVersion || _version > maxVersion)
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return; // Do nothing if too old or too new
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if (_loadStream) {
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_loadStream->read(buf, size);
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} else {
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_saveStream->write(buf, size);
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}
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}
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...
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};
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*/
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// Mixin class / interface
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// TODO Maybe call it ISerializable or SerializableMixin ?
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// TODO: Taken from SCUMM engine -- move to common/ code?
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class Serializable {
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public:
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virtual ~Serializable() {}
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virtual void saveLoadWithSerializer(Serializer *ser) = 0;
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};
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} // end of namespace Tinsel
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#endif
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