mirror of
https://github.com/aaru-dps/Aaru.git
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99 lines
3.4 KiB
C#
99 lines
3.4 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : MicroDOS.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : MicroDOS filesystem plugin
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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 © 2011-2026 Natalia Portillo
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// ****************************************************************************/
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// ReSharper disable UnusedType.Local
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// ReSharper disable UnusedMember.Local
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using System;
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using System.Collections.Generic;
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using System.Text;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Interfaces;
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using Partition = Aaru.CommonTypes.Partition;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>
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/// Implements the MicroDOS filesystem. Information from http://www.owg.ru/mkt/BK/MKDOS.TXT Thanks
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/// to tarlabnor for translating it
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/// </summary>
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public sealed partial class MicroDOS : IReadOnlyFilesystem
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{
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const string MODULE_NAME = "MicroDOS plugin";
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/// <summary>Block size in bytes</summary>
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const int BLOCK_SIZE = 512;
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/// <summary>Directory entry size in bytes</summary>
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const int DIR_ENTRY_SIZE = 24;
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/// <summary>Offset of first directory entry in block 0</summary>
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const int DIR_START_OFFSET = 320;
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/// <summary>Subdirectory marker (first byte of filename = 0x7F)</summary>
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const byte SUBDIR_MARKER = 0x7F;
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/// <summary>Cached root directory entries (filename -> DirectoryEntry)</summary>
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readonly Dictionary<string, DirectoryEntry> _rootDirectoryCache = new();
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/// <summary>Cached superblock (block 0)</summary>
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Block0 _block0;
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/// <summary>Encoding used for filenames (KOI8-R)</summary>
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Encoding _encoding;
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/// <summary>Image plugin being accessed</summary>
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IMediaImage _imagePlugin;
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/// <summary>Whether filesystem is mounted</summary>
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bool _mounted;
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/// <summary>Partition being mounted</summary>
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Partition _partition;
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#region IFilesystem Members
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/// <inheritdoc />
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public FileSystem Metadata { get; private set; }
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/// <inheritdoc />
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public IEnumerable<(string name, Type type, string description)> SupportedOptions { get; } = [];
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/// <inheritdoc />
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public Dictionary<string, string> Namespaces { get; } = [];
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/// <inheritdoc />
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public string Name => Localization.MicroDOS_Name;
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/// <inheritdoc />
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public Guid Id => new("9F9A364A-1A27-48A3-B730-7A7122000324");
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/// <inheritdoc />
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public string Author => Authors.NataliaPortillo;
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#endregion
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} |