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416 lines
16 KiB
C#
416 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 : UkvFdi.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 Spectrum FDI 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.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 UkvFdi : IMediaImage
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{
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readonly byte[] signature = {0x46, 0x44, 0x49};
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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 UkvFdi()
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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 => "Spectrum Floppy Disk Image";
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public Guid Id => new Guid("DADFC9B2-67C1-42A3-B124-825528163FC0");
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public string Format => "Spectrum floppy 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 ImageInfo Info => imageInfo;
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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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FdiHeader hdr = new FdiHeader();
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if(stream.Length < Marshal.SizeOf(hdr)) return false;
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byte[] hdrB = new byte[Marshal.SizeOf(hdr)];
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stream.Read(hdrB, 0, hdrB.Length);
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GCHandle handle = GCHandle.Alloc(hdrB, GCHandleType.Pinned);
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hdr = (FdiHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(FdiHeader));
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handle.Free();
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return hdr.magic.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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FdiHeader hdr = new FdiHeader();
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if(stream.Length < Marshal.SizeOf(hdr)) return false;
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byte[] hdrB = new byte[Marshal.SizeOf(hdr)];
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stream.Read(hdrB, 0, hdrB.Length);
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GCHandle handle = GCHandle.Alloc(hdrB, GCHandleType.Pinned);
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hdr = (FdiHeader)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(FdiHeader));
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handle.Free();
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.addInfoLen = {0}", hdr.addInfoLen);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.cylinders = {0}", hdr.cylinders);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.dataOff = {0}", hdr.dataOff);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.descOff = {0}", hdr.descOff);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.flags = {0}", hdr.flags);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.heads = {0}", hdr.heads);
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stream.Seek(hdr.descOff, SeekOrigin.Begin);
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byte[] description = new byte[hdr.dataOff - hdr.descOff];
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stream.Read(description, 0, description.Length);
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imageInfo.Comments = StringHandlers.CToString(description);
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DicConsole.DebugWriteLine("UkvFdi plugin", "hdr.description = \"{0}\"", imageInfo.Comments);
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stream.Seek(0xE + hdr.addInfoLen, SeekOrigin.Begin);
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long spt = long.MaxValue;
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uint[][][] sectorsOff = new uint[hdr.cylinders][][];
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sectorsData = new byte[hdr.cylinders][][][];
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imageInfo.Cylinders = hdr.cylinders;
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imageInfo.Heads = hdr.heads;
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// Read track descriptors
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for(ushort cyl = 0; cyl < hdr.cylinders; cyl++)
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{
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sectorsOff[cyl] = new uint[hdr.heads][];
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sectorsData[cyl] = new byte[hdr.heads][][];
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for(ushort head = 0; head < hdr.heads; head++)
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{
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byte[] sctB = new byte[4];
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stream.Read(sctB, 0, 4);
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stream.Seek(2, SeekOrigin.Current);
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byte sectors = (byte)stream.ReadByte();
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uint trkOff = BitConverter.ToUInt32(sctB, 0);
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DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.c = {0}", cyl);
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DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.h = {0}", head);
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DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.sectors = {0}", sectors);
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DicConsole.DebugWriteLine("UkvFdi plugin", "trkhdr.off = {0}", trkOff);
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sectorsOff[cyl][head] = new uint[sectors];
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sectorsData[cyl][head] = new byte[sectors][];
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if(sectors < spt && sectors > 0) spt = sectors;
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for(ushort sec = 0; sec < sectors; sec++)
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{
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byte c = (byte)stream.ReadByte();
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byte h = (byte)stream.ReadByte();
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byte r = (byte)stream.ReadByte();
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byte n = (byte)stream.ReadByte();
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SectorFlags f = (SectorFlags)stream.ReadByte();
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byte[] offB = new byte[2];
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stream.Read(offB, 0, 2);
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ushort secOff = BitConverter.ToUInt16(offB, 0);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.c = {0}", c);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.h = {0}", h);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.r = {0}", r);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.n = {0} ({1})", n, 128 << n);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.f = {0}", f);
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DicConsole.DebugWriteLine("UkvFdi plugin", "sechdr.off = {0} ({1})", secOff,
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secOff + trkOff + hdr.dataOff);
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// TODO: This assumes sequential sectors.
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sectorsOff[cyl][head][sec] = secOff + trkOff + hdr.dataOff;
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sectorsData[cyl][head][sec] = new byte[128 << n];
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if(128 << n > imageInfo.SectorSize) imageInfo.SectorSize = (uint)(128 << n);
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}
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}
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}
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// Read sectors
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for(ushort cyl = 0; cyl < hdr.cylinders; cyl++)
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{
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bool emptyCyl = false;
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for(ushort head = 0; head < hdr.heads; head++)
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{
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for(ushort sec = 0; sec < sectorsOff[cyl][head].Length; sec++)
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{
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stream.Seek(sectorsOff[cyl][head][sec], SeekOrigin.Begin);
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stream.Read(sectorsData[cyl][head][sec], 0, sectorsData[cyl][head][sec].Length);
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}
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// For empty cylinders
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if(sectorsOff[cyl][head].Length != 0) continue;
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if(cyl + 1 == hdr.cylinders ||
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// Next cylinder is also empty
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sectorsOff[cyl + 1][head].Length == 0) emptyCyl = true;
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// Create empty sectors
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else
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{
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sectorsData[cyl][head] = new byte[spt][];
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for(int i = 0; i < spt; i++) sectorsData[cyl][head][i] = new byte[imageInfo.SectorSize];
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}
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}
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if(emptyCyl) imageInfo.Cylinders--;
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}
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// TODO: What about double sided, half track pitch compact floppies?
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imageInfo.MediaType = MediaType.CompactFloppy;
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imageInfo.ImageSize = (ulong)stream.Length - hdr.dataOff;
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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.SectorsPerTrack = (uint)spt;
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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 - 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(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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(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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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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[Flags]
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enum DiskFlags : byte
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{
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WriteProtected = 1
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}
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[Flags]
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enum SectorFlags : byte
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{
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CrcOk128 = 0x01,
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CrcOk256 = 0x02,
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CrcOk512 = 0x04,
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CrcOk1024 = 0x08,
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CrcOk2048 = 0x10,
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CrcOk4096 = 0x20,
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Deleted = 0x80
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct FdiHeader
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{
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)] public byte[] magic;
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public DiskFlags flags;
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public ushort cylinders;
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public ushort heads;
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public ushort descOff;
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public ushort dataOff;
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public ushort addInfoLen;
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}
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}
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} |