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108 lines
4.1 KiB
C#
108 lines
4.1 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : CPM.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : CP/M filesystem plugin.
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//
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// --[ Description ] ----------------------------------------------------------
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//
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// Constructors and common variables for the CP/M 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 © 2011-2025 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.Text;
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using Aaru.CommonTypes.AaruMetadata;
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using Aaru.CommonTypes.Interfaces;
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using Aaru.CommonTypes.Structs;
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using FileSystemInfo = Aaru.CommonTypes.Structs.FileSystemInfo;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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/// <summary>Implements the CP/M filesystem</summary>
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public sealed partial class CPM : IReadOnlyFilesystem
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{
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const string MODULE_NAME = "CP/M Plugin";
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/// <summary>True if <see cref="Identify" /> thinks this is a CP/M filesystem</summary>
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bool _cpmFound;
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/// <summary>Cached <see cref="FileSystemInfo" /></summary>
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FileSystemInfo _cpmStat;
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/// <summary>Cached file passwords, decoded</summary>
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Dictionary<string, byte[]> _decodedPasswordCache;
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/// <summary>Stores all known CP/M disk definitions</summary>
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CpmDefinitions _definitions;
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IMediaImage _device;
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/// <summary>Cached directory listing</summary>
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List<string> _dirList;
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/// <summary>CP/M disc parameter block (on-memory)</summary>
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DiscParameterBlock _dpb;
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Encoding _encoding;
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/// <summary>Cached file data</summary>
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Dictionary<string, byte[]> _fileCache;
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/// <summary>The volume label, if the CP/M filesystem contains one</summary>
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string _label;
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/// <summary>Timestamp in volume label for creation</summary>
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byte[] _labelCreationDate;
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/// <summary>Timestamp in volume label for update</summary>
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byte[] _labelUpdateDate;
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bool _mounted;
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/// <summary>Cached file passwords</summary>
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Dictionary<string, byte[]> _passwordCache;
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/// <summary>Sector deinterleaving mask</summary>
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int[] _sectorMask;
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/// <summary>True if there are CP/M 3 timestamps</summary>
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bool _standardTimestamps;
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/// <summary>Cached file <see cref="FileEntryInfo" /></summary>
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Dictionary<string, FileEntryInfo> _statCache;
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/// <summary>True if there are timestamps in Z80DOS or DOS+ format</summary>
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bool _thirdPartyTimestamps;
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/// <summary>If <see cref="Identify" /> thinks this is a CP/M filesystem, this is the definition for it</summary>
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CpmDefinition _workingDefinition;
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#region IReadOnlyFilesystem 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 string Name => Localization.CPM_Name;
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/// <inheritdoc />
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public Guid Id => new("AA2B8585-41DF-4E3B-8A35-D1A935E2F8A1");
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/// <inheritdoc />
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public string Author => Authors.NataliaPortillo;
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/// <inheritdoc />
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public IEnumerable<(string name, Type type, string description)> SupportedOptions => [];
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/// <inheritdoc />
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public Dictionary<string, string> Namespaces => null;
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#endregion
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} |