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131 lines
4.7 KiB
C#
131 lines
4.7 KiB
C#
// /***************************************************************************
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// Aaru Data Preservation Suite
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// ----------------------------------------------------------------------------
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//
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// Filename : Internal.cs
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// Author(s) : Natalia Portillo <claunia@claunia.com>
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//
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// Component : Microsoft NT File System 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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using System.Collections.Generic;
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using Aaru.CommonTypes.Interfaces;
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namespace Aaru.Filesystems;
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/// <inheritdoc />
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public sealed partial class NTFS
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{
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#region Nested type: NtfsDirNode
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/// <summary>Directory node implementation for NTFS directory traversal.</summary>
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sealed class NtfsDirNode : IDirNode
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{
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/// <summary>Array of cached directory entry file names.</summary>
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internal string[] Entries;
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/// <summary>Current position in the directory contents array.</summary>
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internal int Position;
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#region IDirNode Members
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/// <inheritdoc />
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public string Path { get; init; }
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#endregion
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}
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#endregion
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#region Nested type: NtfsFileNode
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/// <summary>File node implementation for NTFS file reading.</summary>
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sealed class NtfsFileNode : IFileNode
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{
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/// <summary>Cached cluster data for sequential read optimization.</summary>
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internal byte[] CachedCluster;
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/// <summary>Absolute cluster offset of the cached cluster (-1 if none cached).</summary>
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internal long CachedClusterOffset = -1;
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/// <summary>Cached decompressed compression unit data.</summary>
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internal byte[] CachedCompressionUnit;
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/// <summary>VCN of the first cluster in the cached compression unit (-1 if none cached).</summary>
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internal long CachedCompressionUnitVcn = -1;
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/// <summary>Cached WOF decompressed frame data.</summary>
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internal byte[] CachedWofFrame;
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/// <summary>Index of the cached WOF frame (-1 if none cached).</summary>
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internal long CachedWofFrameIndex = -1;
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/// <summary>Number of clusters per compression unit (0 if not compressed).</summary>
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internal int CompressionUnitClusters;
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/// <summary>Pre-computed data run list: (absolute cluster offset, length in clusters) tuples.</summary>
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internal List<(long clusterOffset, long clusterLength)> DataRuns;
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/// <summary>Whether the file data is compressed.</summary>
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internal bool IsCompressed;
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/// <summary>Whether the file data is resident (stored in the MFT record).</summary>
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internal bool IsResident;
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/// <summary>Whether the file is WOF (Windows Overlay Filter) externally compressed.</summary>
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internal bool IsWofCompressed;
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/// <summary>Resident file data (small files stored entirely within the MFT record).</summary>
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internal byte[] ResidentData;
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/// <summary>WOF compression algorithm (0=Xpress4K, 1=LZX32K, 2=Xpress8K, 3=Xpress16K).</summary>
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internal uint WofAlgorithm;
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/// <summary>Data runs for the WofCompressedData named stream.</summary>
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internal List<(long clusterOffset, long clusterLength)> WofDataRuns;
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/// <summary>Total size of the WofCompressedData stream in bytes.</summary>
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internal long WofDataSize;
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/// <summary>WOF decompression frame size in bytes.</summary>
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internal int WofFrameSize;
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/// <summary>Whether the WofCompressedData stream is resident.</summary>
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internal bool WofIsResident;
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/// <summary>Resident data from the WofCompressedData stream.</summary>
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internal byte[] WofResidentData;
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#region IFileNode Members
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/// <inheritdoc />
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public string Path { get; init; }
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/// <inheritdoc />
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public long Length { get; init; }
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/// <inheritdoc />
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public long Offset { get; set; }
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#endregion
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}
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#endregion
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} |