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113 lines
5.0 KiB
C#
113 lines
5.0 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : FAT.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Microsoft FAT filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Identifies the Microsoft FAT 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;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Text;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.CommonTypes.Structs;
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using Schemas;
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namespace Aaru.Filesystems
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{
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// TODO: Differentiate between Atari and X68k FAT, as this one uses a standard BPB.
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// X68K uses cdate/adate from direntry for extending filename
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/// <inheritdoc />
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/// <summary>Implements the File Allocation Table, aka FAT, filesystem (FAT12, FAT16 and FAT32 variants).</summary>
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public sealed partial class FAT : IReadOnlyFilesystem
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{
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uint _bytesPerCluster;
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byte[] _cachedEaData;
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CultureInfo _cultureInfo;
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bool _debug;
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Dictionary<string, Dictionary<string, CompleteDirectoryEntry>> _directoryCache;
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DirectoryEntry _eaDirEntry;
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bool _fat12;
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bool _fat16;
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bool _fat32;
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ushort[] _fatEntries;
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ulong _fatFirstSector;
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ulong _firstClusterSector;
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bool _mounted;
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Namespace _namespace;
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uint _reservedSectors;
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Dictionary<string, CompleteDirectoryEntry> _rootDirectoryCache;
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uint _sectorsPerCluster;
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uint _sectorsPerFat;
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FileSystemInfo _statfs;
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bool _useFirstFat;
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/// <inheritdoc />
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public FileSystemType XmlFsType { get; private set; }
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/// <inheritdoc />
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public Encoding Encoding { get; private set; }
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/// <inheritdoc />
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public string Name => "Microsoft File Allocation Table";
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/// <inheritdoc />
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public Guid Id => new("33513B2C-0D26-0D2D-32C3-79D8611158E0");
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/// <inheritdoc />
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public string Author => "Natalia Portillo";
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/// <inheritdoc />
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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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{};
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/// <inheritdoc />
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public Dictionary<string, string> Namespaces => new()
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{
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{
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"dos", "DOS (8.3 all uppercase)"
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},
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{
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"nt", "Windows NT (8.3 mixed case)"
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},
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{
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"os2", "OS/2 .LONGNAME extended attribute"
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},
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{
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"ecs", "Use LFN when available with fallback to .LONGNAME (default)"
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},
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{
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"lfn", "Long file names"
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}
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};
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static Dictionary<string, string> GetDefaultOptions() => new()
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{
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{
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"debug", false.ToString()
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}
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};
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}
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} |