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114 lines
4.4 KiB
C#
114 lines
4.4 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Info.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Apple DOS filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Apple DOS filesystem 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 © 2011-2021 Natalia Portillo
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// ****************************************************************************/
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using System.Text;
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using Aaru.CommonTypes;
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using Aaru.CommonTypes.Enums;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.Helpers;
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using Claunia.Encoding;
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using Schemas;
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using Encoding = System.Text.Encoding;
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namespace Aaru.Filesystems
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{
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public sealed partial class AppleDOS
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{
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/// <inheritdoc />
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public bool Identify(IMediaImage imagePlugin, Partition partition)
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{
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if(imagePlugin.Info.Sectors != 455 &&
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imagePlugin.Info.Sectors != 560)
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return false;
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if(partition.Start > 0 ||
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imagePlugin.Info.SectorSize != 256)
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return false;
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int spt = imagePlugin.Info.Sectors == 455 ? 13 : 16;
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var errno = imagePlugin.ReadSector((ulong)(17 * spt), out byte[] vtocB);
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if(errno != ErrorNumber.NoError)
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return false;
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_vtoc = Marshal.ByteArrayToStructureLittleEndian<Vtoc>(vtocB);
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return _vtoc.catalogSector < spt && _vtoc.maxTrackSectorPairsPerSector <= 122 &&
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_vtoc.sectorsPerTrack == spt && _vtoc.bytesPerSector == 256;
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}
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/// <inheritdoc />
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public void GetInformation(IMediaImage imagePlugin, Partition partition, out string information,
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Encoding encoding)
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{
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Encoding = encoding ?? new Apple2();
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information = "";
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var sb = new StringBuilder();
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int spt = imagePlugin.Info.Sectors == 455 ? 13 : 16;
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var errno = imagePlugin.ReadSector((ulong)(17 * spt), out byte[] vtocB);
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if(errno != ErrorNumber.NoError)
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return;
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_vtoc = Marshal.ByteArrayToStructureLittleEndian<Vtoc>(vtocB);
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sb.AppendLine("Apple DOS File System");
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sb.AppendLine();
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sb.AppendFormat("Catalog starts at sector {0} of track {1}", _vtoc.catalogSector, _vtoc.catalogTrack).
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AppendLine();
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sb.AppendFormat("File system initialized by DOS release {0}", _vtoc.dosRelease).AppendLine();
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sb.AppendFormat("Disk volume number {0}", _vtoc.volumeNumber).AppendLine();
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sb.AppendFormat("Sectors allocated at most in track {0}", _vtoc.lastAllocatedSector).AppendLine();
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sb.AppendFormat("{0} tracks in volume", _vtoc.tracks).AppendLine();
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sb.AppendFormat("{0} sectors per track", _vtoc.sectorsPerTrack).AppendLine();
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sb.AppendFormat("{0} bytes per sector", _vtoc.bytesPerSector).AppendLine();
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sb.AppendFormat("Track allocation is {0}", _vtoc.allocationDirection > 0 ? "forward" : "reverse").
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AppendLine();
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information = sb.ToString();
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XmlFsType = new FileSystemType
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{
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Bootable = true,
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Clusters = imagePlugin.Info.Sectors,
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ClusterSize = imagePlugin.Info.SectorSize,
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Type = "Apple DOS"
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};
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}
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}
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} |