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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 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.
*
*/
#ifndef GLK_FROTZ_QUETZAL
#define GLK_FROTZ_QUETZAL
#include "glk/glk_types.h"
#include "glk/frotz/frotz_types.h"
namespace Glk {
namespace Frotz {
enum QueztalTag {
ID_FORM = MKTAG('F', 'O', 'R', 'M'),
ID_IFZS = MKTAG('I', 'F', 'Z', 'S'),
ID_IFhd = MKTAG('I', 'F', 'h', 'd'),
ID_UMem = MKTAG('U', 'M', 'e', 'm'),
ID_CMem = MKTAG('C', 'M', 'e', 'm'),
ID_Stks = MKTAG('S', 't', 'k', 's'),
ID_ANNO = MKTAG('A', 'N', 'N', 'O'),
ID_SCVM = MKTAG('S', 'C', 'V', 'M')
};
class Processor;
class Quetzal {
private:
Common::SeekableReadStream *_storyFile;
Common::WriteStream *_out;
zword frames[STACK_SIZE / 4 + 1];
private:
/**
* Read a 16-bit value from the file
*/
bool read_word(Common::ReadStream *f, zword *result);
/**
* Read 32-bit value from the file
*/
bool read_long(Common::ReadStream *f, uint *result);
void write_byte(zbyte b) { _out->writeByte(b); }
void write_bytx(zword b) { _out->writeByte(b & 0xFF); }
void write_word(zword w) { _out->writeUint16BE(w); }
void write_long(uint l) { _out->writeUint32BE(l); }
void write_run(zword run) { write_byte(0); write_byte(run); }
void write_chnk(QueztalTag id, zword len) {
_out->writeUint32BE(id);
_out->writeUint32BE(len);
}
public:
/**
* Constructor
*/
Quetzal(Common::SeekableReadStream *storyFile) : _storyFile(storyFile) {}
/*
* Save a game using Quetzal format.
* @param svf Savegame file
* @param proc Pointer to the Frotz processor
* @param desc Savegame description
* @returns Returns true if OK, false if failed
*/
bool save(Common::WriteStream *svf, Processor *proc, const Common::String &desc);
/**
* Restore a saved game using Quetzal format
* @param svf Savegame file
* @param proc Pointer to the Frotz processor
* @returns Return 2 if OK, 0 if an error occurred before any damage was done,
* -1 on a fatal error
*/
int restore(Common::SeekableReadStream *svf, Processor *proc);
};
} // End of namespace Frotz
} // End of namespace Glk
#endif
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