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71 lines
2.0 KiB
C#
71 lines
2.0 KiB
C#
/* This file is part of libmspack.
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* (C) 2003-2004 Stuart Caie.
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*
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* The deflate method was created by Phil Katz. MSZIP is equivalent to the
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* deflate method.
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*
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* libmspack is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License (LGPL) version 2.1
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*
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* For further details, see the file COPYING.LIB distributed with libmspack
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*/
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using System;
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using static LibMSPackSharp.Compression.Constants;
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namespace LibMSPackSharp.Compression
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{
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public class MSZIPDStream : CompressionStream
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{
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#region Fields
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/// <summary>
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/// 32kb history window
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/// </summary>
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public byte[] Window { get; set; } = new byte[MSZIP_FRAME_SIZE];
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/// <summary>
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/// Offset within window
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/// </summary>
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public uint WindowPosition { get; set; }
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/// <summary>
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/// inflate() will call this whenever the window should be emptied.
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/// </summary>
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public Func<MSZIPDStream, uint, Error> FlushWindow;
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public bool RepairMode { get; set; }
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public int BytesOutput { get; set; }
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#region Huffman code lengths
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public byte[] LITERAL_len { get; set; } = new byte[MSZIP_LITERAL_MAXSYMBOLS];
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public byte[] DISTANCE_len { get; set; } = new byte[MSZIP_DISTANCE_MAXSYMBOLS];
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#endregion
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#region Huffman decoding tables
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public ushort[] LITERAL_table { get; set; } = new ushort[MSZIP_LITERAL_TABLESIZE];
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public ushort[] DISTANCE_table { get; set; } = new ushort[MSZIP_DISTANCE_TABLESIZE];
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#endregion
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#endregion
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/// <inheritdoc/>
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public override Error HUFF_ERROR() => Error.INF_ERR_HUFFSYM;
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/// <inheritdoc/>
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public override void READ_BYTES(BufferState state)
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{
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READ_IF_NEEDED(state);
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if (Error != Error.MSPACK_ERR_OK)
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return;
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INJECT_BITS_LSB(InputBuffer[state.InputPointer++], 8, state);
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}
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}
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}
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