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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/>.
*
*/
/*
* https://paradroid.automac.se/diskimage/
* Copyright (c) 2003-2006, Per Olofsson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer. Redistributions in
* binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef GLK_SCOTT_DISKIMAGE_H
#define GLK_SCOTT_DISKIMAGE_H
#include "common/scummsys.h"
#include "glk/scott/types.h"
namespace Glk {
namespace Scott {
// constants for the supported disk formats
#define MAXTRACKS 80
#define MAXSECTORS 40
#define D64SIZE 174848
#define D64ERRSIZE 175531
#define D71SIZE 349696
#define D71ERRSIZE 351062
#define D81SIZE 819200
#define D81ERRSIZE 822400
enum ImageType {
D64 = 1,
D71,
D81
};
struct TrackSector {
byte _track;
byte _sector;
};
struct DiskImage {
char *_filename;
int _size;
ImageType _type;
byte *_image;
byte *_errinfo;
TrackSector _bam;
TrackSector _bam2;
TrackSector _dir;
int _openfiles;
int _blocksfree;
int _modified;
int _status;
int _interleave;
TrackSector _statusts;
};
struct RawDirEntry {
TrackSector _nextts;
byte _type;
TrackSector _startts;
byte _rawname[16];
TrackSector _relsidets;
byte _relrecsize;
byte _unused[4];
TrackSector _replacetemp;
byte _sizelo;
byte _sizehi;
};
struct ImageFile {
DiskImage *_diskimage;
RawDirEntry *_rawdirentry;
char _mode;
int _position;
TrackSector _ts;
TrackSector _nextts;
byte *_buffer;
int _bufptr;
int _buflen;
byte _visited[MAXTRACKS][MAXSECTORS];
};
ImageFile *diOpen(DiskImage *di, byte *rawname, byte type, const char *mode);
int diRead(ImageFile *imgfile, byte *buffer, int len);
byte *diGetTsAddr(DiskImage *di, TrackSector ts);
int diGetTsErr(DiskImage *di, TrackSector ts);
int diSectorsPerTrack(ImageType type, int track);
int diTracks(ImageType type);
int diGetBlockNum(ImageType type, TrackSector ts);
TrackSector diGetDirTs(DiskImage *di);
int diTrackBlocksFree(DiskImage *di, int track);
int diIsTsFree(DiskImage *di, TrackSector ts);
void diAllocTs(DiskImage *di, TrackSector ts);
int diRawnameFromName(byte *rawname, const char *name);
RawDirEntry *findLargestFileEntry(DiskImage *di);
DiskImage *diCreateFromData(uint8_t *data, int length);
} // End of namespace Scott
} // End of namespace Glk
#endif
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