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347 lines
13 KiB
C#
347 lines
13 KiB
C#
// /***************************************************************************
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// The Disc Image Chef
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// ----------------------------------------------------------------------------
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//
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// Filename : CBM.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Commodore file system plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Commodore file system and shows information.
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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.Runtime.InteropServices;
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using System.Text;
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using DiscImageChef.CommonTypes;
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namespace DiscImageChef.Filesystems
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{
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public class CBM : Filesystem
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{
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public CBM()
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{
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Name = "Commodore file system";
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PluginUUID = new Guid("D104744E-A376-450C-BAC0-1347C93F983B");
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CurrentEncoding = new Claunia.Encoding.PETSCII();
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}
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public CBM(Encoding encoding)
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{
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Name = "Commodore file system";
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PluginUUID = new Guid("D104744E-A376-450C-BAC0-1347C93F983B");
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CurrentEncoding = new Claunia.Encoding.PETSCII();
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}
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public CBM(DiscImages.ImagePlugin imagePlugin, Partition partition, Encoding encoding)
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{
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Name = "Commodore file system";
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PluginUUID = new Guid("D104744E-A376-450C-BAC0-1347C93F983B");
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CurrentEncoding = new Claunia.Encoding.PETSCII();
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct CommodoreBAM
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{
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/// <summary>
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/// Track where directory starts
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/// </summary>
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public byte directoryTrack;
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/// <summary>
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/// Sector where directory starts
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/// </summary>
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public byte directorySector;
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/// <summary>
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/// Disk DOS version, 0x41
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/// </summary>
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public byte dosVersion;
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/// <summary>
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/// Set to 0x80 if 1571, 0x00 if not
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/// </summary>
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public byte doubleSided;
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/// <summary>
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/// Block allocation map
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 140)] public byte[] bam;
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/// <summary>
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/// Disk name
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] name;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public ushort fill1;
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/// <summary>
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/// Disk ID
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/// </summary>
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public ushort diskId;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public byte fill2;
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/// <summary>
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/// DOS type
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/// </summary>
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public ushort dosType;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public uint fill3;
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/// <summary>
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/// Unused
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/// </summary>
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public byte unused1;
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/// <summary>
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/// Block allocation map for Dolphin DOS extended tracks
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)] public byte[] dolphinBam;
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/// <summary>
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/// Block allocation map for Speed DOS extended tracks
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)] public byte[] speedBam;
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/// <summary>
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/// Unused
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 9)] public byte[] unused2;
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/// <summary>
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/// Free sector count for second side in 1571
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 9)] public byte[] freeCount;
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}
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[StructLayout(LayoutKind.Sequential, Pack = 1)]
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struct CommodoreHeader
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{
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/// <summary>
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/// Track where directory starts
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/// </summary>
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public byte directoryTrack;
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/// <summary>
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/// Sector where directory starts
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/// </summary>
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public byte directorySector;
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/// <summary>
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/// Disk DOS version, 0x44
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/// </summary>
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public byte diskDosVersion;
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/// <summary>
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/// Unusued
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/// </summary>
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public byte unused1;
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/// <summary>
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/// Disk name
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/// </summary>
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[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public byte[] name;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public ushort fill1;
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/// <summary>
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/// Disk ID
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/// </summary>
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public ushort diskId;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public byte fill2;
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/// <summary>
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/// DOS version ('3')
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/// </summary>
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public byte dosVersion;
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/// <summary>
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/// Disk version ('D')
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/// </summary>
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public byte diskVersion;
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/// <summary>
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/// Filled with 0xA0
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/// </summary>
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public short fill3;
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}
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public override bool Identify(DiscImages.ImagePlugin imagePlugin, Partition partition)
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{
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if(partition.Start > 0) return false;
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if(imagePlugin.ImageInfo.SectorSize != 256) return false;
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if(imagePlugin.ImageInfo.Sectors != 683 && imagePlugin.ImageInfo.Sectors != 768 &&
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imagePlugin.ImageInfo.Sectors != 1366 && imagePlugin.ImageInfo.Sectors != 3200) return false;
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byte[] sector;
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if(imagePlugin.ImageInfo.Sectors == 3200)
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{
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sector = imagePlugin.ReadSector(1560);
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CommodoreHeader cbmHdr = new CommodoreHeader();
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IntPtr cbmHdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(cbmHdr));
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Marshal.Copy(sector, 0, cbmHdrPtr, Marshal.SizeOf(cbmHdr));
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cbmHdr = (CommodoreHeader)Marshal.PtrToStructure(cbmHdrPtr, typeof(CommodoreHeader));
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Marshal.FreeHGlobal(cbmHdrPtr);
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if(cbmHdr.diskDosVersion == 0x44 && cbmHdr.dosVersion == 0x33 && cbmHdr.diskVersion == 0x44)
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return true;
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}
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else
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{
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sector = imagePlugin.ReadSector(357);
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CommodoreBAM cbmBam = new CommodoreBAM();
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IntPtr cbmBamPtr = Marshal.AllocHGlobal(Marshal.SizeOf(cbmBam));
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Marshal.Copy(sector, 0, cbmBamPtr, Marshal.SizeOf(cbmBam));
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cbmBam = (CommodoreBAM)Marshal.PtrToStructure(cbmBamPtr, typeof(CommodoreBAM));
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Marshal.FreeHGlobal(cbmBamPtr);
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if(cbmBam.dosVersion == 0x41 && (cbmBam.doubleSided == 0x00 || cbmBam.doubleSided == 0x80) &&
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cbmBam.unused1 == 0x00 && cbmBam.directoryTrack == 0x12) return true;
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}
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return false;
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}
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public override void GetInformation(DiscImages.ImagePlugin imagePlugin, Partition partition,
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out string information)
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{
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byte[] sector;
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StringBuilder sbInformation = new StringBuilder();
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sbInformation.AppendLine("Commodore file system");
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xmlFSType = new Schemas.FileSystemType();
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xmlFSType.Type = "Commodore file system";
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xmlFSType.Clusters = (long)imagePlugin.ImageInfo.Sectors;
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xmlFSType.ClusterSize = 256;
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if(imagePlugin.ImageInfo.Sectors == 3200)
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{
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sector = imagePlugin.ReadSector(1560);
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CommodoreHeader cbmHdr = new CommodoreHeader();
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IntPtr cbmHdrPtr = Marshal.AllocHGlobal(Marshal.SizeOf(cbmHdr));
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Marshal.Copy(sector, 0, cbmHdrPtr, Marshal.SizeOf(cbmHdr));
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cbmHdr = (CommodoreHeader)Marshal.PtrToStructure(cbmHdrPtr, typeof(CommodoreHeader));
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Marshal.FreeHGlobal(cbmHdrPtr);
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sbInformation.AppendFormat("Directory starts at track {0} sector {1}", cbmHdr.directoryTrack,
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cbmHdr.directorySector).AppendLine();
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sbInformation.AppendFormat("Disk DOS Version: {0}",
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Encoding.ASCII.GetString(new byte[] {cbmHdr.diskDosVersion})).AppendLine();
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sbInformation.AppendFormat("DOS Version: {0}", Encoding.ASCII.GetString(new byte[] {cbmHdr.dosVersion}))
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.AppendLine();
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sbInformation
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.AppendFormat("Disk Version: {0}", Encoding.ASCII.GetString(new byte[] {cbmHdr.diskVersion}))
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.AppendLine();
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sbInformation.AppendFormat("Disk ID: {0}", cbmHdr.diskId).AppendLine();
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sbInformation.AppendFormat("Disk name: {0}", StringHandlers.CToString(cbmHdr.name, CurrentEncoding))
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.AppendLine();
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xmlFSType.VolumeName = StringHandlers.CToString(cbmHdr.name, CurrentEncoding);
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xmlFSType.VolumeSerial = string.Format("{0}", cbmHdr.diskId);
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}
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else
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{
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sector = imagePlugin.ReadSector(357);
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CommodoreBAM cbmBam = new CommodoreBAM();
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IntPtr cbmBamPtr = Marshal.AllocHGlobal(Marshal.SizeOf(cbmBam));
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Marshal.Copy(sector, 0, cbmBamPtr, Marshal.SizeOf(cbmBam));
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cbmBam = (CommodoreBAM)Marshal.PtrToStructure(cbmBamPtr, typeof(CommodoreBAM));
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Marshal.FreeHGlobal(cbmBamPtr);
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sbInformation.AppendFormat("Directory starts at track {0} sector {1}", cbmBam.directoryTrack,
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cbmBam.directorySector).AppendLine();
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sbInformation.AppendFormat("Disk DOS type: {0}",
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Encoding.ASCII.GetString(BitConverter.GetBytes(cbmBam.dosType)))
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.AppendLine();
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sbInformation.AppendFormat("DOS Version: {0}", Encoding.ASCII.GetString(new byte[] {cbmBam.dosVersion}))
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.AppendLine();
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sbInformation.AppendFormat("Disk ID: {0}", cbmBam.diskId).AppendLine();
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sbInformation.AppendFormat("Disk name: {0}", StringHandlers.CToString(cbmBam.name, CurrentEncoding))
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.AppendLine();
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xmlFSType.VolumeName = StringHandlers.CToString(cbmBam.name, CurrentEncoding);
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xmlFSType.VolumeSerial = string.Format("{0}", cbmBam.diskId);
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}
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information = sbInformation.ToString();
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}
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public override Errno Mount()
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{
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return Errno.NotImplemented;
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}
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public override Errno Mount(bool debug)
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{
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return Errno.NotImplemented;
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}
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public override Errno Unmount()
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{
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return Errno.NotImplemented;
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}
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public override Errno MapBlock(string path, long fileBlock, ref long deviceBlock)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetAttributes(string path, ref FileAttributes attributes)
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{
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return Errno.NotImplemented;
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}
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public override Errno ListXAttr(string path, ref List<string> xattrs)
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{
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return Errno.NotImplemented;
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}
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public override Errno GetXattr(string path, string xattr, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno Read(string path, long offset, long size, ref byte[] buf)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadDir(string path, ref List<string> contents)
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{
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return Errno.NotImplemented;
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}
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public override Errno StatFs(ref FileSystemInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno Stat(string path, ref FileEntryInfo stat)
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{
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return Errno.NotImplemented;
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}
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public override Errno ReadLink(string path, ref string dest)
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{
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return Errno.NotImplemented;
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}
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}
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} |