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573 lines
21 KiB
C#
573 lines
21 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : Virtual98.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 Virtual98 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 System.Text;
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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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using Schemas;
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namespace DiscImageChef.DiscImages
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{
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// Info from Neko Project II emulator
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public class Virtual98 : IWritableImage
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{
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readonly byte[] signature = {0x56, 0x48, 0x44, 0x31, 0x2E, 0x30, 0x30, 0x00};
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ImageInfo imageInfo;
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IFilter nhdImageFilter;
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Virtual98Header v98Hdr;
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FileStream writingStream;
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public Virtual98()
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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 => "Virtual98 Disk Image";
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public Guid Id => new Guid("C0CDE13D-04D0-4913-8740-AFAA44D0A107");
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public string Format => "Virtual98 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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// Even if comment is supposedly ASCII, I'm pretty sure most emulators allow Shift-JIS to be used :p
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Encoding shiftjis = Encoding.GetEncoding("shift_jis");
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v98Hdr = new Virtual98Header();
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if(stream.Length < Marshal.SizeOf(v98Hdr)) return false;
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byte[] hdrB = new byte[Marshal.SizeOf(v98Hdr)];
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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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v98Hdr =
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(Virtual98Header)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(Virtual98Header));
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handle.Free();
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if(!v98Hdr.signature.SequenceEqual(signature)) return false;
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.signature = \"{0}\"",
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StringHandlers.CToString(v98Hdr.signature, shiftjis));
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.comment = \"{0}\"",
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StringHandlers.CToString(v98Hdr.comment, shiftjis));
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.padding = {0}", v98Hdr.padding);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.mbsize = {0}", v98Hdr.mbsize);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.sectorsize = {0}", v98Hdr.sectorsize);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.sectors = {0}", v98Hdr.sectors);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.surfaces = {0}", v98Hdr.surfaces);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.cylinders = {0}", v98Hdr.cylinders);
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DicConsole.DebugWriteLine("Virtual98 plugin", "v98hdr.totals = {0}", v98Hdr.totals);
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return true;
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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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// Even if comment is supposedly ASCII, I'm pretty sure most emulators allow Shift-JIS to be used :p
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Encoding shiftjis = Encoding.GetEncoding("shift_jis");
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v98Hdr = new Virtual98Header();
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if(stream.Length < Marshal.SizeOf(v98Hdr)) return false;
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byte[] hdrB = new byte[Marshal.SizeOf(v98Hdr)];
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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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v98Hdr =
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(Virtual98Header)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(Virtual98Header));
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handle.Free();
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imageInfo.MediaType = MediaType.GENERIC_HDD;
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imageInfo.ImageSize = (ulong)(stream.Length - 0xDC);
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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 = v98Hdr.totals;
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imageInfo.XmlMediaType = XmlMediaType.BlockMedia;
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imageInfo.SectorSize = v98Hdr.sectorsize;
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imageInfo.Cylinders = v98Hdr.cylinders;
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imageInfo.Heads = v98Hdr.surfaces;
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imageInfo.SectorsPerTrack = v98Hdr.sectors;
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imageInfo.Comments = StringHandlers.CToString(v98Hdr.comment, shiftjis);
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nhdImageFilter = imageFilter;
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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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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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byte[] buffer = new byte[length * imageInfo.SectorSize];
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Stream stream = nhdImageFilter.GetDataForkStream();
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// V98 are lazy allocated
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if((long)(0xDC + sectorAddress * imageInfo.SectorSize) >= stream.Length) return buffer;
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stream.Seek((long)(0xDC + sectorAddress * imageInfo.SectorSize), SeekOrigin.Begin);
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int toRead = (int)(length * imageInfo.SectorSize);
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if(toRead + stream.Position > stream.Length) toRead = (int)(stream.Length - stream.Position);
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stream.Read(buffer, 0, toRead);
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return buffer;
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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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public List<DumpHardwareType> DumpHardware => null;
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public CICMMetadataType CicmMetadata => null;
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public IEnumerable<MediaTagType> SupportedMediaTags => new MediaTagType[] { };
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public IEnumerable<SectorTagType> SupportedSectorTags => new SectorTagType[] { };
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public IEnumerable<MediaType> SupportedMediaTypes =>
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new[]
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{
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MediaType.GENERIC_HDD, MediaType.Unknown, MediaType.FlashDrive, MediaType.CompactFlash,
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MediaType.CompactFlashType2, MediaType.PCCardTypeI, MediaType.PCCardTypeII, MediaType.PCCardTypeIII,
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MediaType.PCCardTypeIV
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};
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public IEnumerable<(string name, Type type, string description)> SupportedOptions =>
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new (string name, Type type, string description)[] { };
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public IEnumerable<string> KnownExtensions => new[] {".v98"};
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public bool IsWriting { get; private set; }
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public string ErrorMessage { get; private set; }
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public bool Create(string path, MediaType mediaType, Dictionary<string, string> options, ulong sectors,
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uint sectorSize)
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{
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if(sectorSize != 512)
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{
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ErrorMessage = "Unsupported sector size";
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return false;
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}
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if(sectors > uint.MaxValue)
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{
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ErrorMessage = "Too many sectors";
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return false;
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}
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if(!SupportedMediaTypes.Contains(mediaType))
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{
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ErrorMessage = $"Unsupport media format {mediaType}";
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return false;
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}
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imageInfo = new ImageInfo {MediaType = mediaType, SectorSize = sectorSize, Sectors = sectors};
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try { writingStream = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); }
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catch(IOException e)
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{
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ErrorMessage = $"Could not create new image file, exception {e.Message}";
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return false;
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}
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IsWriting = true;
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ErrorMessage = null;
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return true;
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}
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public bool WriteMediaTag(byte[] data, MediaTagType tag)
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{
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ErrorMessage = "Writing media tags is not supported.";
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return false;
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}
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public bool WriteSector(byte[] data, ulong sectorAddress)
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{
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if(!IsWriting)
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{
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ErrorMessage = "Tried to write on a non-writable image";
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return false;
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}
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if(data.Length != 512)
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{
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ErrorMessage = "Incorrect data size";
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return false;
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}
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if(sectorAddress >= imageInfo.Sectors)
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{
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ErrorMessage = "Tried to write past image size";
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return false;
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}
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writingStream.Seek((long)(0xDC + sectorAddress * 512), SeekOrigin.Begin);
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writingStream.Write(data, 0, data.Length);
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ErrorMessage = "";
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return true;
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}
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public bool WriteSectors(byte[] data, ulong sectorAddress, uint length)
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{
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if(!IsWriting)
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{
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ErrorMessage = "Tried to write on a non-writable image";
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return false;
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}
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if(data.Length % 512 != 0)
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{
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ErrorMessage = "Incorrect data size";
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return false;
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}
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if(sectorAddress + length > imageInfo.Sectors)
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{
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ErrorMessage = "Tried to write past image size";
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return false;
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}
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writingStream.Seek((long)(0xDC + sectorAddress * 512), SeekOrigin.Begin);
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writingStream.Write(data, 0, data.Length);
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ErrorMessage = "";
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return true;
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}
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public bool WriteSectorLong(byte[] data, ulong sectorAddress)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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public bool WriteSectorsLong(byte[] data, ulong sectorAddress, uint length)
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{
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ErrorMessage = "Writing sectors with tags is not supported.";
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return false;
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}
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public bool SetTracks(List<Track> tracks)
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{
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ErrorMessage = "Unsupported feature";
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return false;
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}
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public bool Close()
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{
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if(!IsWriting)
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{
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ErrorMessage = "Image is not opened for writing";
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return false;
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}
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if(imageInfo.Cylinders == 0)
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{
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imageInfo.Cylinders = (uint)(imageInfo.Sectors / 16 / 63);
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imageInfo.Heads = 16;
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imageInfo.SectorsPerTrack = 63;
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while(imageInfo.Cylinders == 0)
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{
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imageInfo.Heads--;
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if(imageInfo.Heads == 0)
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{
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imageInfo.SectorsPerTrack--;
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imageInfo.Heads = 16;
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}
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imageInfo.Cylinders = (uint)(imageInfo.Sectors / imageInfo.Heads / imageInfo.SectorsPerTrack);
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if(imageInfo.Cylinders == 0 && imageInfo.Heads == 0 && imageInfo.SectorsPerTrack == 0) break;
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}
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}
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byte[] commentsBytes = null;
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if(!string.IsNullOrEmpty(imageInfo.Comments))
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commentsBytes = Encoding.GetEncoding("shift_jis").GetBytes(imageInfo.Comments);
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v98Hdr = new Virtual98Header
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{
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comment = new byte[128],
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cylinders = (ushort)imageInfo.Cylinders,
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padding2 = new byte[0x44],
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sectors = (byte)imageInfo.SectorsPerTrack,
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sectorsize = (ushort)imageInfo.SectorSize,
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signature = signature,
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surfaces = (byte)imageInfo.Heads,
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totals = (uint)imageInfo.Sectors
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};
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if(commentsBytes != null)
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Array.Copy(commentsBytes, 0, v98Hdr.comment, 0,
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commentsBytes.Length >= 128 ? 128 : commentsBytes.Length);
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byte[] hdr = new byte[Marshal.SizeOf(v98Hdr)];
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IntPtr hdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(v98Hdr));
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Marshal.StructureToPtr(v98Hdr, hdrPtr, true);
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Marshal.Copy(hdrPtr, hdr, 0, hdr.Length);
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Marshal.FreeHGlobal(hdrPtr);
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writingStream.Seek(0, SeekOrigin.Begin);
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writingStream.Write(hdr, 0, hdr.Length);
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writingStream.Flush();
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writingStream.Close();
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IsWriting = false;
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ErrorMessage = "";
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return true;
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}
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public bool SetMetadata(ImageInfo metadata)
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{
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imageInfo.Comments = metadata.Comments;
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return true;
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}
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public bool SetGeometry(uint cylinders, uint heads, uint sectorsPerTrack)
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{
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if(cylinders > ushort.MaxValue)
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{
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ErrorMessage = "Too many cylinders.";
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return false;
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}
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if(heads > byte.MaxValue)
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{
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ErrorMessage = "Too many heads.";
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return false;
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}
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if(sectorsPerTrack > byte.MaxValue)
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{
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ErrorMessage = "Too many sectors per track.";
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return false;
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}
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imageInfo.SectorsPerTrack = sectorsPerTrack;
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imageInfo.Heads = heads;
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imageInfo.Cylinders = cylinders;
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return true;
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}
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public bool WriteSectorTag(byte[] data, ulong sectorAddress, SectorTagType tag)
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{
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ErrorMessage = "Unsupported feature";
|
|
return false;
|
|
}
|
|
|
|
public bool WriteSectorsTag(byte[] data, ulong sectorAddress, uint length, SectorTagType tag)
|
|
{
|
|
ErrorMessage = "Unsupported feature";
|
|
return false;
|
|
}
|
|
|
|
public bool SetDumpHardware(List<DumpHardwareType> dumpHardware)
|
|
{
|
|
// Not supported
|
|
return false;
|
|
}
|
|
|
|
public bool SetCicmMetadata(CICMMetadataType metadata)
|
|
{
|
|
// Not supported
|
|
return false;
|
|
}
|
|
|
|
[StructLayout(LayoutKind.Sequential, Pack = 1)]
|
|
struct Virtual98Header
|
|
{
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
|
|
public byte[] signature;
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 128)]
|
|
public byte[] comment;
|
|
public uint padding;
|
|
public ushort mbsize;
|
|
public ushort sectorsize;
|
|
public byte sectors;
|
|
public byte surfaces;
|
|
public ushort cylinders;
|
|
public uint totals;
|
|
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x44)]
|
|
public byte[] padding2;
|
|
}
|
|
}
|
|
} |