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https://github.com/aaru-dps/Aaru.git
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465 lines
17 KiB
C#
465 lines
17 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : CisCopy.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Disk image plugins.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Manages CisCopy disk images.
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//
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// --[ License ] --------------------------------------------------------------
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//
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 2.1 of the
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// License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, see <http://www.gnu.org/licenses/>.
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//
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// ----------------------------------------------------------------------------
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// Copyright © 2011-2018 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics.CodeAnalysis;
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using System.IO;
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using DiscImageChef.CommonTypes;
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using DiscImageChef.Console;
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using DiscImageChef.Filters;
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namespace DiscImageChef.DiscImages
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{
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/* This is a very simple format created by a German application called CisCopy, aka CCOPY.EXE, with extension .DCF.
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* First byte indicates the floppy type, limited to standard formats.
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* Indeed if the floppy is not DOS formatted, user must choose from the list of supported formats manually.
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* Next 80 bytes (for 5.25" DD disks) or 160 bytes (for 5.25" HD and 3.5" disks) indicate if a track has been copied
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* or not.
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* It offers three copy methods:
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* a) All, copies all tracks
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* b) FAT, copies all tracks which contain sectors marked as sued by FAT
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* c) "Belelung" similarly to FAT. On some disk tests FAT cuts data, while belelung does not.
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* Finally, next byte indicates compression:
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* 0) No compression
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* 1) Normal compression, algorithm unknown
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* 2) High compression, algorithm unknown
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* Then the data for whole tracks follow.
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*/
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public class CisCopy : ImagePlugin
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{
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byte[] decodedDisk;
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public CisCopy()
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{
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Name = "CisCopy Disk Image (DC-File)";
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PluginUuid = new Guid("EDF20CC7-6012-49E2-9E92-663A53E42130");
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ImageInfo = new ImageInfo
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{
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ReadableSectorTags = new List<SectorTagType>(),
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ReadableMediaTags = new List<MediaTagType>(),
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HasPartitions = false,
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HasSessions = false,
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Version = null,
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Application = null,
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ApplicationVersion = null,
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Creator = null,
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Comments = null,
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MediaManufacturer = null,
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MediaModel = null,
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MediaSerialNumber = null,
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MediaBarcode = null,
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MediaPartNumber = null,
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MediaSequence = 0,
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LastMediaSequence = 0,
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DriveManufacturer = null,
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DriveModel = null,
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DriveSerialNumber = null,
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DriveFirmwareRevision = null
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};
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}
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public override string ImageFormat => "CisCopy";
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public override List<Partition> Partitions =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public override List<Track> Tracks =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public override List<Session> Sessions =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public override bool IdentifyImage(Filter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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DiskType type = (DiskType)stream.ReadByte();
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byte tracks;
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switch(type)
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{
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case DiskType.MD1DD8:
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case DiskType.MD1DD:
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case DiskType.MD2DD8:
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case DiskType.MD2DD:
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tracks = 80;
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break;
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case DiskType.MF2DD:
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case DiskType.MD2HD:
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case DiskType.MF2HD:
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tracks = 160;
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break;
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default: return false;
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}
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byte[] trackBytes = new byte[tracks];
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stream.Read(trackBytes, 0, tracks);
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for(int i = 0; i < tracks; i++)
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if(trackBytes[i] != (byte)TrackType.Copied && trackBytes[i] != (byte)TrackType.Omitted &&
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trackBytes[i] != (byte)TrackType.OmittedAlternate) return false;
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Compression cmpr = (Compression)stream.ReadByte();
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if(cmpr != Compression.None && cmpr != Compression.Normal && cmpr != Compression.High) return false;
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switch(type)
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{
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case DiskType.MD1DD8:
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if(stream.Length > 40 * 1 * 8 * 512 + 82) return false;
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break;
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case DiskType.MD1DD:
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if(stream.Length > 40 * 1 * 9 * 512 + 82) return false;
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break;
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case DiskType.MD2DD8:
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if(stream.Length > 40 * 2 * 8 * 512 + 82) return false;
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break;
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case DiskType.MD2DD:
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if(stream.Length > 40 * 2 * 9 * 512 + 82) return false;
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break;
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case DiskType.MF2DD:
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if(stream.Length > 80 * 2 * 9 * 512 + 162) return false;
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break;
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case DiskType.MD2HD:
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if(stream.Length > 80 * 2 * 15 * 512 + 162) return false;
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break;
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case DiskType.MF2HD:
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if(stream.Length > 80 * 2 * 18 * 512 + 162) return false;
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break;
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}
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return true;
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}
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public override bool OpenImage(Filter imageFilter)
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{
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Stream stream = imageFilter.GetDataForkStream();
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stream.Seek(0, SeekOrigin.Begin);
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DiskType type = (DiskType)stream.ReadByte();
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byte tracks;
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switch(type)
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{
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case DiskType.MD1DD8:
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case DiskType.MD1DD:
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case DiskType.MD2DD8:
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case DiskType.MD2DD:
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tracks = 80;
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break;
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case DiskType.MF2DD:
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case DiskType.MD2HD:
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case DiskType.MF2HD:
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tracks = 160;
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break;
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default: throw new ImageNotSupportedException($"Incorrect disk type {(byte)type}");
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}
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byte[] trackBytes = new byte[tracks];
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stream.Read(trackBytes, 0, tracks);
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Compression cmpr = (Compression)stream.ReadByte();
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if(cmpr != Compression.None)
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throw new FeatureSupportedButNotImplementedImageException("Compressed images are not supported.");
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int tracksize = 0;
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switch(type)
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{
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case DiskType.MD1DD8:
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case DiskType.MD2DD8:
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tracksize = 8 * 512;
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break;
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case DiskType.MD1DD:
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case DiskType.MD2DD:
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case DiskType.MF2DD:
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tracksize = 9 * 512;
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break;
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case DiskType.MD2HD:
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tracksize = 15 * 512;
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break;
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case DiskType.MF2HD:
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tracksize = 18 * 512;
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break;
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}
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int headstep = 1;
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if(type == DiskType.MD1DD || type == DiskType.MD1DD8) headstep = 2;
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MemoryStream decodedImage = new MemoryStream();
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for(int i = 0; i < tracks; i += headstep)
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{
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byte[] track = new byte[tracksize];
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if((TrackType)trackBytes[i] == TrackType.Copied) stream.Read(track, 0, tracksize);
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else ArrayHelpers.ArrayFill(track, (byte)0xF6);
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decodedImage.Write(track, 0, tracksize);
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}
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/*
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FileStream debugStream = new FileStream("debug.img", FileMode.CreateNew, FileAccess.ReadWrite);
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debugStream.Write(decodedImage.ToArray(), 0, (int)decodedImage.Length);
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debugStream.Close();
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*/
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ImageInfo.Application = "CisCopy";
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ImageInfo.CreationTime = imageFilter.GetCreationTime();
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ImageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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ImageInfo.MediaTitle = imageFilter.GetFilename();
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ImageInfo.ImageSize = (ulong)(stream.Length - 2 - trackBytes.Length);
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ImageInfo.SectorSize = 512;
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switch(type)
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{
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case DiskType.MD1DD8:
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ImageInfo.MediaType = MediaType.DOS_525_SS_DD_8;
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ImageInfo.Sectors = 40 * 1 * 8;
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ImageInfo.Heads = 1;
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ImageInfo.Cylinders = 40;
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ImageInfo.SectorsPerTrack = 8;
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break;
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case DiskType.MD2DD8:
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ImageInfo.MediaType = MediaType.DOS_525_DS_DD_8;
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ImageInfo.Sectors = 40 * 2 * 8;
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ImageInfo.Heads = 2;
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ImageInfo.Cylinders = 40;
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ImageInfo.SectorsPerTrack = 8;
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break;
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case DiskType.MD1DD:
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ImageInfo.MediaType = MediaType.DOS_525_SS_DD_9;
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ImageInfo.Sectors = 40 * 1 * 9;
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ImageInfo.Heads = 1;
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ImageInfo.Cylinders = 40;
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ImageInfo.SectorsPerTrack = 9;
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break;
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case DiskType.MD2DD:
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ImageInfo.MediaType = MediaType.DOS_525_DS_DD_9;
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ImageInfo.Sectors = 40 * 2 * 9;
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ImageInfo.Heads = 2;
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ImageInfo.Cylinders = 40;
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ImageInfo.SectorsPerTrack = 9;
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break;
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case DiskType.MF2DD:
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ImageInfo.MediaType = MediaType.DOS_35_DS_DD_9;
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ImageInfo.Sectors = 80 * 2 * 9;
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ImageInfo.Heads = 2;
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ImageInfo.Cylinders = 80;
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ImageInfo.SectorsPerTrack = 9;
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break;
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case DiskType.MD2HD:
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ImageInfo.MediaType = MediaType.DOS_525_HD;
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ImageInfo.Sectors = 80 * 2 * 15;
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ImageInfo.Heads = 2;
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ImageInfo.Cylinders = 80;
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ImageInfo.SectorsPerTrack = 15;
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break;
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case DiskType.MF2HD:
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ImageInfo.MediaType = MediaType.DOS_35_HD;
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ImageInfo.Sectors = 80 * 2 * 18;
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ImageInfo.Heads = 2;
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ImageInfo.Cylinders = 80;
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ImageInfo.SectorsPerTrack = 18;
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break;
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}
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ImageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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decodedDisk = decodedImage.ToArray();
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decodedImage.Close();
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DicConsole.VerboseWriteLine("CisCopy image contains a disk of type {0}", ImageInfo.MediaType);
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return true;
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}
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public override bool? VerifySector(ulong sectorAddress)
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{
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return null;
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}
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public override bool? VerifySector(ulong sectorAddress, uint track)
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{
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return null;
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}
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public override bool? VerifySectors(ulong sectorAddress, uint length, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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failingLbas = new List<ulong>();
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unknownLbas = new List<ulong>();
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for(ulong i = sectorAddress; i < sectorAddress + length; i++) unknownLbas.Add(i);
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return null;
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}
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public override bool? VerifySectors(ulong sectorAddress, uint length, uint track, out List<ulong> failingLbas,
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out List<ulong> unknownLbas)
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{
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failingLbas = new List<ulong>();
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unknownLbas = new List<ulong>();
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for(ulong i = sectorAddress; i < sectorAddress + length; i++) unknownLbas.Add(i);
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return null;
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}
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public override bool? VerifyMediaImage()
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{
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return null;
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}
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public override byte[] ReadSector(ulong sectorAddress)
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{
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return ReadSectors(sectorAddress, 1);
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}
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public override byte[] ReadSectors(ulong sectorAddress, uint length)
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{
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if(sectorAddress > ImageInfo.Sectors - 1)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sectorAddress + length > ImageInfo.Sectors)
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throw new ArgumentOutOfRangeException(nameof(length), "Requested more sectors than available");
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byte[] buffer = new byte[length * ImageInfo.SectorSize];
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Array.Copy(decodedDisk, (int)sectorAddress * ImageInfo.SectorSize, buffer, 0,
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length * ImageInfo.SectorSize);
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return buffer;
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}
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public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorLong(ulong sectorAddress)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsLong(ulong sectorAddress, uint length)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadDiskTag(MediaTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Track> GetSessionTracks(Session session)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override List<Track> GetSessionTracks(ushort session)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSector(ulong sectorAddress, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorTag(ulong sectorAddress, uint track, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectors(ulong sectorAddress, uint length, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsTag(ulong sectorAddress, uint length, uint track, SectorTagType tag)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorLong(ulong sectorAddress, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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public override byte[] ReadSectorsLong(ulong sectorAddress, uint length, uint track)
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{
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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}
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[SuppressMessage("ReSharper", "InconsistentNaming")]
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enum DiskType : byte
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{
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MD1DD8 = 1,
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MD1DD = 2,
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MD2DD8 = 3,
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MD2DD = 4,
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MF2DD = 5,
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MD2HD = 6,
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MF2HD = 7
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}
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enum Compression : byte
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{
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None = 0,
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Normal = 1,
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High = 2
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}
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enum TrackType : byte
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{
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Copied = 0x4C,
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Omitted = 0xFA,
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OmittedAlternate = 0xFE
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}
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}
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} |