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https://github.com/scummvm/scummvm.git
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144 lines
4.2 KiB
C++
144 lines
4.2 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* https://paradroid.automac.se/diskimage/
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* Copyright (c) 2003-2006, Per Olofsson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer. Redistributions in
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* binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef GLK_SCOTT_DISKIMAGE_H
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#define GLK_SCOTT_DISKIMAGE_H
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#include "common/scummsys.h"
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#include "glk/scott/types.h"
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namespace Glk {
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namespace Scott {
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// constants for the supported disk formats
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#define MAXTRACKS 80
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#define MAXSECTORS 40
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#define D64SIZE 174848
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#define D64ERRSIZE 175531
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#define D71SIZE 349696
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#define D71ERRSIZE 351062
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#define D81SIZE 819200
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#define D81ERRSIZE 822400
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enum ImageType {
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D64 = 1,
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D71,
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D81
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};
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struct TrackSector {
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byte _track;
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byte _sector;
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};
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struct DiskImage {
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char *_filename;
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int _size;
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ImageType _type;
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byte *_image;
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byte *_errinfo;
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TrackSector _bam;
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TrackSector _bam2;
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TrackSector _dir;
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int _openfiles;
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int _blocksfree;
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int _modified;
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int _status;
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int _interleave;
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TrackSector _statusts;
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};
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struct RawDirEntry {
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TrackSector _nextts;
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byte _type;
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TrackSector _startts;
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byte _rawname[16];
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TrackSector _relsidets;
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byte _relrecsize;
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byte _unused[4];
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TrackSector _replacetemp;
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byte _sizelo;
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byte _sizehi;
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};
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struct ImageFile {
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DiskImage *_diskimage;
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RawDirEntry *_rawdirentry;
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char _mode;
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int _position;
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TrackSector _ts;
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TrackSector _nextts;
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byte *_buffer;
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int _bufptr;
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int _buflen;
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byte _visited[MAXTRACKS][MAXSECTORS];
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};
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ImageFile *diOpen(DiskImage *di, byte *rawname, byte type, const char *mode);
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int diRead(ImageFile *imgfile, byte *buffer, int len);
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byte *diGetTsAddr(DiskImage *di, TrackSector ts);
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int diGetTsErr(DiskImage *di, TrackSector ts);
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int diSectorsPerTrack(ImageType type, int track);
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int diTracks(ImageType type);
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int diGetBlockNum(ImageType type, TrackSector ts);
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TrackSector diGetDirTs(DiskImage *di);
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int diTrackBlocksFree(DiskImage *di, int track);
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int diIsTsFree(DiskImage *di, TrackSector ts);
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void diAllocTs(DiskImage *di, TrackSector ts);
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int diRawnameFromName(byte *rawname, const char *name);
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RawDirEntry *findLargestFileEntry(DiskImage *di);
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DiskImage *diCreateFromData(uint8_t *data, int length);
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} // End of namespace Scott
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} // End of namespace Glk
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#endif
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