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483 lines
20 KiB
C#
483 lines
20 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Apridisk.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 Apridisk 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.Linq;
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using System.Runtime.InteropServices;
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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 Apridisk : IMediaImage
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{
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readonly byte[] signature =
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{
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0x41, 0x43, 0x54, 0x20, 0x41, 0x70, 0x72, 0x69, 0x63, 0x6F, 0x74, 0x20, 0x64, 0x69, 0x73, 0x6B, 0x20, 0x69,
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0x6D, 0x61, 0x67, 0x65, 0x1A, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00
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};
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ImageInfo imageInfo;
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// Cylinder by head, sector data matrix
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byte[][][][] sectorsData;
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public Apridisk()
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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 ImageInfo Info => imageInfo;
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public string Name => "ACT Apricot Disk Image";
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public Guid Id => new Guid("43408CF3-6DB3-449F-A779-2B0E497C5B14");
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public string Format => "ACT Apricot disk image";
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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 < signature.Length) return false;
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byte[] sigB = new byte[signature.Length];
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stream.Read(sigB, 0, signature.Length);
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return sigB.SequenceEqual(signature);
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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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// Skip signature
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stream.Seek(signature.Length, SeekOrigin.Begin);
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int totalCylinders = -1;
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int totalHeads = -1;
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int maxSector = -1;
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int recordSize = Marshal.SizeOf(typeof(ApridiskRecord));
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// Count cylinders
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while(stream.Position < stream.Length)
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{
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byte[] recB = new byte[recordSize];
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stream.Read(recB, 0, recordSize);
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GCHandle handle = GCHandle.Alloc(recB, GCHandleType.Pinned);
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ApridiskRecord record =
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(ApridiskRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(ApridiskRecord));
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handle.Free();
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switch(record.type)
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{
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// Deleted record, just skip it
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case RecordType.Deleted:
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DicConsole.DebugWriteLine("Apridisk plugin", "Found deleted record at {0}", stream.Position);
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stream.Seek(record.headerSize - recordSize + record.dataSize, SeekOrigin.Current);
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break;
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case RecordType.Comment:
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DicConsole.DebugWriteLine("Apridisk plugin", "Found comment record at {0}", stream.Position);
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stream.Seek(record.headerSize - recordSize, SeekOrigin.Current);
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byte[] commentB = new byte[record.dataSize];
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stream.Read(commentB, 0, commentB.Length);
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imageInfo.Comments = StringHandlers.CToString(commentB);
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DicConsole.DebugWriteLine("Apridisk plugin", "Comment: \"{0}\"", imageInfo.Comments);
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break;
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case RecordType.Creator:
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DicConsole.DebugWriteLine("Apridisk plugin", "Found creator record at {0}", stream.Position);
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stream.Seek(record.headerSize - recordSize, SeekOrigin.Current);
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byte[] creatorB = new byte[record.dataSize];
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stream.Read(creatorB, 0, creatorB.Length);
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imageInfo.Creator = StringHandlers.CToString(creatorB);
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DicConsole.DebugWriteLine("Apridisk plugin", "Creator: \"{0}\"", imageInfo.Creator);
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break;
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case RecordType.Sector:
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if(record.compression != CompressType.Compressed &&
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record.compression != CompressType.Uncompresed)
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throw new
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ImageNotSupportedException($"Found record with unknown compression type 0x{(ushort)record.compression:X4} at {stream.Position}");
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DicConsole.DebugWriteLine("Apridisk plugin",
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"Found {4} sector record at {0} for cylinder {1} head {2} sector {3}",
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stream.Position, record.cylinder, record.head, record.sector,
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record.compression == CompressType.Compressed
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? "compressed"
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: "uncompressed");
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if(record.cylinder > totalCylinders) totalCylinders = record.cylinder;
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if(record.head > totalHeads) totalHeads = record.head;
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if(record.sector > maxSector) maxSector = record.sector;
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stream.Seek(record.headerSize - recordSize + record.dataSize, SeekOrigin.Current);
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break;
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default:
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throw new
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ImageNotSupportedException($"Found record with unknown type 0x{(uint)record.type:X8} at {stream.Position}");
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}
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}
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totalCylinders++;
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totalHeads++;
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if(totalCylinders <= 0 || totalHeads <= 0)
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throw new ImageNotSupportedException("No cylinders or heads found");
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sectorsData = new byte[totalCylinders][][][];
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// Total sectors per track
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uint[][] spts = new uint[totalCylinders][];
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imageInfo.Cylinders = (ushort)totalCylinders;
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imageInfo.Heads = (byte)totalHeads;
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DicConsole.DebugWriteLine("Apridisk plugin",
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"Found {0} cylinders and {1} heads with a maximum sector number of {2}",
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totalCylinders, totalHeads, maxSector);
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// Create heads
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for(int i = 0; i < totalCylinders; i++)
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{
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sectorsData[i] = new byte[totalHeads][][];
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spts[i] = new uint[totalHeads];
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for(int j = 0; j < totalHeads; j++) sectorsData[i][j] = new byte[maxSector + 1][];
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}
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imageInfo.SectorSize = uint.MaxValue;
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ulong headersizes = 0;
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// Read sectors
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stream.Seek(signature.Length, SeekOrigin.Begin);
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while(stream.Position < stream.Length)
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{
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byte[] recB = new byte[recordSize];
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stream.Read(recB, 0, recordSize);
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GCHandle handle = GCHandle.Alloc(recB, GCHandleType.Pinned);
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ApridiskRecord record =
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(ApridiskRecord)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(ApridiskRecord));
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handle.Free();
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switch(record.type)
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{
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// Not sector record, just skip it
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case RecordType.Deleted:
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case RecordType.Comment:
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case RecordType.Creator:
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stream.Seek(record.headerSize - recordSize + record.dataSize, SeekOrigin.Current);
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headersizes += record.headerSize + record.dataSize;
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break;
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case RecordType.Sector:
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stream.Seek(record.headerSize - recordSize, SeekOrigin.Current);
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byte[] data = new byte[record.dataSize];
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stream.Read(data, 0, data.Length);
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spts[record.cylinder][record.head]++;
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uint realLength = record.dataSize;
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if(record.compression == CompressType.Compressed)
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realLength =
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Decompress(data, out sectorsData[record.cylinder][record.head][record.sector]);
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else sectorsData[record.cylinder][record.head][record.sector] = data;
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if(realLength < imageInfo.SectorSize) imageInfo.SectorSize = realLength;
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headersizes += record.headerSize + record.dataSize;
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break;
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}
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}
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DicConsole.DebugWriteLine("Apridisk plugin", "Found a minimum of {0} bytes per sector",
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imageInfo.SectorSize);
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// Count sectors per track
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uint spt = uint.MaxValue;
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for(ushort cyl = 0; cyl < imageInfo.Cylinders; cyl++)
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{
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for(ushort head = 0; head < imageInfo.Heads; head++)
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if(spts[cyl][head] < spt)
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spt = spts[cyl][head];
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}
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imageInfo.SectorsPerTrack = spt;
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DicConsole.DebugWriteLine("Apridisk plugin", "Found a minimum of {0} sectors per track",
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imageInfo.SectorsPerTrack);
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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, 512, MediaEncoding.MFM, false));
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imageInfo.ImageSize = (ulong)stream.Length - headersizes;
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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.Sectors = imageInfo.Cylinders * imageInfo.Heads * imageInfo.SectorsPerTrack;
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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return true;
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}
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public byte[] ReadSector(ulong sectorAddress)
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{
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(ushort cylinder, byte head, byte sector) = LbaToChs(sectorAddress);
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if(cylinder >= sectorsData.Length)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(head >= sectorsData[cylinder].Length)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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if(sector > sectorsData[cylinder][head].Length)
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throw new ArgumentOutOfRangeException(nameof(sectorAddress), "Sector address not found");
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return sectorsData[cylinder][head][sector];
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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(uint i = 0; i < length; i++)
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{
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byte[] sector = ReadSector(sectorAddress + i);
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buffer.Write(sector, 0, sector.Length);
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}
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return buffer.ToArray();
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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 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[] 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[] 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[] 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)
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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)
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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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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 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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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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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 = 0; i < imageInfo.Sectors; 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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throw new FeatureUnsupportedImageException("Feature not supported by image format");
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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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static uint Decompress(byte[] compressed, out byte[] decompressed)
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{
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int readp = 0;
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int cLen = compressed.Length;
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MemoryStream buffer = new MemoryStream();
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uint uLen = 0;
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while(cLen >= 3)
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{
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ushort blklen = BitConverter.ToUInt16(compressed, readp);
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readp += 2;
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for(int i = 0; i < blklen; i++) buffer.WriteByte(compressed[readp]);
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uLen += blklen;
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readp++;
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cLen -= 3;
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}
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decompressed = buffer.ToArray();
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return uLen;
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}
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(ushort cylinder, byte head, byte sector) LbaToChs(ulong lba)
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{
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ushort cylinder = (ushort)(lba / (imageInfo.Heads * imageInfo.SectorsPerTrack));
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byte head = (byte)(lba / imageInfo.SectorsPerTrack % imageInfo.Heads);
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byte sector = (byte)(lba % imageInfo.SectorsPerTrack + 1);
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return (cylinder, head, sector);
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}
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enum RecordType : uint
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{
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Deleted = 0xE31D0000,
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Sector = 0xE31D0001,
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Comment = 0xE31D0002,
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Creator = 0xE31D0003
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}
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enum CompressType : ushort
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{
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Uncompresed = 0x9E90,
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Compressed = 0x3E5A
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct ApridiskRecord
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{
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public RecordType type;
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public CompressType compression;
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public ushort headerSize;
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public uint dataSize;
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public byte head;
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public byte sector;
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public ushort cylinder;
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}
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}
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} |