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Code Issues 9 Packages Projects Releases 20 Wiki Activity

More LZX cleanup

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This commit is contained in:
Matt Nadareski
2023-09-22 20:47:29 -04:00
parent 6d6361c153
commit 0c95cfcde4
3 changed files with 34 additions and 30 deletions
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12
Compression/LZX/AlignedOffsetBlockData.cs
View File

@@ -77,8 +77,14 @@ namespace SabreTools.Models.Compression.LZX
public int[]? PathLengthsLengthTree { get; set; }
#endif
// Entry Comments Size
// ---------------------------------------------------------------------------------------
// Token sequence (matches and literals) Specified in section 2.6 Variable
/// <summary>
/// Token sequence (matches and literals)
/// </summary>
/// <remarks>Variable</remarks>
#if NET48
public byte[] TokenSequence { get; set; }
#else
public byte[]? TokenSequence { get; set; }
#endif
}
}

40
Compression/LZX/Constants.cs
View File

@@ -3,44 +3,36 @@ namespace SabreTools.Models.Compression.LZX
public static class Constants
{
/* some constants defined by the LZX specification */
public const int LZX_MIN_MATCH = (2);
public const int LZX_MAX_MATCH = (257);
public const int LZX_NUM_CHARS = (256);
/// <summary>
/// also blocktypes 4-7 invalid
/// </summary>
public const int LZX_BLOCKTYPE_INVALID = (0);
public const int LZX_BLOCKTYPE_VERBATIM = (1);
public const int LZX_BLOCKTYPE_ALIGNED = (2);
public const int LZX_BLOCKTYPE_UNCOMPRESSED = (3);
public const int LZX_PRETREE_NUM_ELEMENTS = (20);
public const int LZX_MIN_MATCH = 2;
public const int LZX_MAX_MATCH = 257;
public const int LZX_NUM_CHARS = 256;
public const int LZX_PRETREE_NUM_ELEMENTS = 20;
/// <summary>
/// aligned offset tree #elements
/// </summary>
public const int LZX_ALIGNED_NUM_ELEMENTS = (8);
public const int LZX_ALIGNED_NUM_ELEMENTS = 8;
/// <summary>
/// this one missing from spec!
/// </summary>
public const int LZX_NUM_PRIMARY_LENGTHS = (7);
public const int LZX_NUM_PRIMARY_LENGTHS = 7;
/// <summary>
/// length tree #elements
/// </summary>
public const int LZX_NUM_SECONDARY_LENGTHS = (249);
public const int LZX_NUM_SECONDARY_LENGTHS = 249;
/* LZX huffman defines: tweak tablebits as desired */
public const int LZX_PRETREE_MAXSYMBOLS = (LZX_PRETREE_NUM_ELEMENTS);
public const int LZX_PRETREE_TABLEBITS = (6);
public const int LZX_MAINTREE_MAXSYMBOLS = (LZX_NUM_CHARS + 50 * 8);
public const int LZX_MAINTREE_TABLEBITS = (12);
public const int LZX_LENGTH_MAXSYMBOLS = (LZX_NUM_SECONDARY_LENGTHS + 1);
public const int LZX_LENGTH_TABLEBITS = (12);
public const int LZX_ALIGNED_MAXSYMBOLS = (LZX_ALIGNED_NUM_ELEMENTS);
public const int LZX_ALIGNED_TABLEBITS = (7);
public const int LZX_PRETREE_MAXSYMBOLS = LZX_PRETREE_NUM_ELEMENTS;
public const int LZX_PRETREE_TABLEBITS = 6;
public const int LZX_MAINTREE_MAXSYMBOLS = LZX_NUM_CHARS + 50 * 8;
public const int LZX_MAINTREE_TABLEBITS = 12;
public const int LZX_LENGTH_MAXSYMBOLS = LZX_NUM_SECONDARY_LENGTHS + 1;
public const int LZX_LENGTH_TABLEBITS = 12;
public const int LZX_ALIGNED_MAXSYMBOLS = LZX_ALIGNED_NUM_ELEMENTS;
public const int LZX_ALIGNED_TABLEBITS = 7;
public const int LZX_LENTABLE_SAFETY = (64); /* we allow length table decoding overruns */
public const int LZX_LENTABLE_SAFETY = 64; /* we allow length table decoding overruns */
}
}

12
Compression/LZX/VerbatimBlockData.cs
View File

@@ -66,8 +66,14 @@ namespace SabreTools.Models.Compression.LZX
public int[]? PathLengthsLengthTree { get; set; }
#endif
// Entry Comments Size
// ---------------------------------------------------------------------------------------
// Token sequence (matches and literals) Specified in section 2.6 Variable
/// <summary>
/// Token sequence (matches and literals)
/// </summary>
/// <remarks>Variable</remarks>
#if NET48
public byte[] TokenSequence { get; set; }
#else
public byte[]? TokenSequence { get; set; }
#endif
}
}