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405 lines
16 KiB
C#
405 lines
16 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : IMD.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 Sydex IMD disc 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.IO;
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using System.Text;
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using System.Text.RegularExpressions;
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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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public class Imd : IMediaImage
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{
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const byte SECTOR_CYLINDER_MAP_MASK = 0x80;
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const byte SECTOR_HEAD_MAP_MASK = 0x40;
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const byte COMMENT_END = 0x1A;
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const string REGEX_HEADER =
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@"IMD (?<version>\d.\d+):\s+(?<day>\d+)\/\s*(?<month>\d+)\/(?<year>\d+)\s+(?<hour>\d+):(?<minute>\d+):(?<second>\d+)\r\n";
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ImageInfo imageInfo;
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List<byte[]> sectorsData;
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public Imd()
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{
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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 string Name => "Dunfield's IMD";
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public Guid Id => new Guid("0D67162E-38A3-407D-9B1A-CF40080A48CB");
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public ImageInfo Info => imageInfo;
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public string Format => "IMageDisk";
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public List<Partition> Partitions =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public List<Track> Tracks =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public List<Session> Sessions =>
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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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public bool Identify(IFilter 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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if(stream.Length < 31) return false;
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byte[] hdr = new byte[31];
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stream.Read(hdr, 0, 31);
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Regex hr = new Regex(REGEX_HEADER);
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Match hm = hr.Match(Encoding.ASCII.GetString(hdr));
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return hm.Success;
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}
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public bool Open(IFilter 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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MemoryStream cmt = new MemoryStream();
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stream.Seek(0x1F, SeekOrigin.Begin);
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for(uint i = 0; i < stream.Length; i++)
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{
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byte b = (byte)stream.ReadByte();
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if(b == 0x1A) break;
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cmt.WriteByte(b);
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}
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imageInfo.Comments = StringHandlers.CToString(cmt.ToArray());
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sectorsData = new List<byte[]>();
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byte currentCylinder = 0;
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imageInfo.Cylinders = 1;
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imageInfo.Heads = 1;
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ulong currentLba = 0;
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TransferRate mode = TransferRate.TwoHundred;
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while(stream.Position + 5 < stream.Length)
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{
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mode = (TransferRate)stream.ReadByte();
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byte cylinder = (byte)stream.ReadByte();
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byte head = (byte)stream.ReadByte();
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byte spt = (byte)stream.ReadByte();
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byte n = (byte)stream.ReadByte();
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byte[] idmap = new byte[spt];
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byte[] cylmap = new byte[spt];
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byte[] headmap = new byte[spt];
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ushort[] bps = new ushort[spt];
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if(cylinder != currentCylinder)
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{
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currentCylinder = cylinder;
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imageInfo.Cylinders++;
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}
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if((head & 1) == 1) imageInfo.Heads = 2;
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stream.Read(idmap, 0, idmap.Length);
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if((head & SECTOR_CYLINDER_MAP_MASK) == SECTOR_CYLINDER_MAP_MASK) stream.Read(cylmap, 0, cylmap.Length);
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if((head & SECTOR_HEAD_MAP_MASK) == SECTOR_HEAD_MAP_MASK)
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stream.Read(headmap, 0, headmap.Length);
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if(n == 0xFF)
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{
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byte[] bpsbytes = new byte[spt * 2];
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stream.Read(bpsbytes, 0, bpsbytes.Length);
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for(int i = 0; i < spt; i++) bps[i] = BitConverter.ToUInt16(bpsbytes, i * 2);
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}
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else
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for(int i = 0; i < spt; i++)
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bps[i] = (ushort)(128 << n);
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if(spt > imageInfo.SectorsPerTrack) imageInfo.SectorsPerTrack = spt;
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SortedDictionary<byte, byte[]> track = new SortedDictionary<byte, byte[]>();
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for(int i = 0; i < spt; i++)
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{
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SectorType type = (SectorType)stream.ReadByte();
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byte[] data = new byte[bps[i]];
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// TODO; Handle disks with different bps in track 0
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if(bps[i] > imageInfo.SectorSize) imageInfo.SectorSize = bps[i];
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switch(type)
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{
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case SectorType.Unavailable:
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if(!track.ContainsKey(idmap[i])) track.Add(idmap[i], data);
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break;
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case SectorType.Normal:
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case SectorType.Deleted:
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case SectorType.Error:
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case SectorType.DeletedError:
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stream.Read(data, 0, data.Length);
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if(!track.ContainsKey(idmap[i])) track.Add(idmap[i], data);
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imageInfo.ImageSize += (ulong)data.Length;
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break;
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case SectorType.Compressed:
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case SectorType.CompressedDeleted:
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case SectorType.CompressedError:
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case SectorType.CompressedDeletedError:
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byte filling = (byte)stream.ReadByte();
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ArrayHelpers.ArrayFill(data, filling);
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if(!track.ContainsKey(idmap[i])) track.Add(idmap[i], data);
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break;
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default: throw new ImageNotSupportedException($"Invalid sector type {(byte)type}");
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}
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}
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foreach(KeyValuePair<byte, byte[]> kvp in track)
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{
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sectorsData.Add(kvp.Value);
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currentLba++;
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}
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}
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imageInfo.Application = "IMD";
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// TODO: The header is the date of dump or the date of the application compilation?
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imageInfo.CreationTime = imageFilter.GetCreationTime();
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imageInfo.LastModificationTime = imageFilter.GetLastWriteTime();
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imageInfo.MediaTitle = Path.GetFileNameWithoutExtension(imageFilter.GetFilename());
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imageInfo.Comments = StringHandlers.CToString(cmt.ToArray());
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imageInfo.Sectors = currentLba;
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imageInfo.MediaType = MediaType.Unknown;
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MediaEncoding mediaEncoding = MediaEncoding.MFM;
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if(mode == TransferRate.TwoHundred || mode == TransferRate.ThreeHundred || mode == TransferRate.FiveHundred)
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mediaEncoding = MediaEncoding.FM;
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imageInfo.MediaType =
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Geometry.GetMediaType(((ushort)imageInfo.Cylinders, (byte)imageInfo.Heads,
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(ushort)imageInfo.SectorsPerTrack, imageInfo.SectorSize, mediaEncoding, false));
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switch(imageInfo.MediaType)
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{
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case MediaType.NEC_525_HD when mode == TransferRate.FiveHundredMfm:
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imageInfo.MediaType = MediaType.NEC_35_HD_8;
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break;
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case MediaType.DOS_525_HD when mode == TransferRate.FiveHundredMfm:
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imageInfo.MediaType = MediaType.NEC_35_HD_15;
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break;
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case MediaType.RX50 when mode == TransferRate.FiveHundredMfm:
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imageInfo.MediaType = MediaType.ATARI_35_SS_DD;
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break;
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}
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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DicConsole.VerboseWriteLine("IMD image contains a disk of type {0}", imageInfo.MediaType);
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if(!string.IsNullOrEmpty(imageInfo.Comments))
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DicConsole.VerboseWriteLine("IMD comments: {0}", imageInfo.Comments);
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return true;
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}
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public bool? VerifySector(ulong sectorAddress)
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{
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return null;
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}
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public 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 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 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 bool? VerifyMediaImage()
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{
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return null;
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}
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public 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 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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MemoryStream buffer = new MemoryStream();
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for(int i = 0; i < length; i++)
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buffer.Write(sectorsData[(int)sectorAddress + i], 0, sectorsData[(int)sectorAddress + i].Length);
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return buffer.ToArray();
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}
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public 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 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 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 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 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 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 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 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 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 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 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 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 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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enum TransferRate : byte
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{
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/// <summary>500 kbps in FM mode</summary>
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FiveHundred = 0,
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/// <summary>300 kbps in FM mode</summary>
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ThreeHundred = 1,
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/// <summary>250 kbps in FM mode</summary>
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TwoHundred = 2,
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/// <summary>500 kbps in MFM mode</summary>
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FiveHundredMfm = 3,
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/// <summary>300 kbps in MFM mode</summary>
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ThreeHundredMfm = 4,
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/// <summary>250 kbps in MFM mode</summary>
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TwoHundredMfm = 5
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}
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enum SectorType : byte
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{
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Unavailable = 0,
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Normal = 1,
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Compressed = 2,
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Deleted = 3,
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CompressedDeleted = 4,
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Error = 5,
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CompressedError = 6,
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DeletedError = 7,
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CompressedDeletedError = 8
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}
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}
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} |