SabreTools/SabreTools.Compression
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Add byte array constructors

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This commit is contained in:
Matt Nadareski
2023-09-22 23:52:14 -04:00
parent e739fd6fd5
commit 8e5cf3ee2e
2 changed files with 76 additions and 0 deletions
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25
MSZIP/DeflateDecompressor.cs
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@@ -15,11 +15,36 @@ namespace SabreTools.Compression.MSZIP
/// </summary>
private BitStream _bitStream;
/// <summary>
/// Create a new Decompressor from a byte array
/// </summary>
/// <param name="input">Byte array to decompress</param>
#if NET48
public DeflateDecompressor(byte[] input)
#else
public DeflateDecompressor(byte[]? input)
#endif
{
// If we have an invalid stream
if (input == null || input.Length == 0)
throw new ArgumentException(nameof(input));
// Create a memory stream to wrap
var ms = new MemoryStream(input);
// Wrap the stream in a BitStream
_bitStream = new BitStream(ms);
}
/// <summary>
/// Create a new Decompressor from a Stream
/// </summary>
/// <param name="input">Stream to decompress</param>
#if NET48
public DeflateDecompressor(Stream input)
#else
public DeflateDecompressor(Stream? input)
#endif
{
// If we have an invalid stream
if (input == null || !input.CanRead || !input.CanSeek)

51
Quantum/Decompressor.cs
View File

@@ -80,12 +80,63 @@ namespace SabreTools.Compression.Quantum
#endregion
/// <summary>
/// Create a new Decompressor from a byte array
/// </summary>
/// <param name="input">Byte array to decompress</param>
/// <param name="windowBits">Number of bits in the sliding window</param>
#if NET48
public Decompressor(byte[] input, uint windowBits)
#else
public Decompressor(byte[]? input, uint windowBits)
#endif
{
// If we have an invalid stream
if (input == null || input.Length == 0)
throw new ArgumentException(nameof(input));
// If we have an invalid value for the window bits
if (windowBits < 10 || windowBits > 21)
throw new ArgumentOutOfRangeException(nameof(windowBits));
// Create a memory stream to wrap
var ms = new MemoryStream(input);
// Wrap the stream in a BitStream
_bitStream = new BitStream(ms);
// Initialize literal models
this._model0 = CreateModel(0, 64);
this._model1 = CreateModel(64, 64);
this._model2 = CreateModel(128, 64);
this._model3 = CreateModel(192, 64);
// Initialize LZ models
int maxBitLength = (int)(windowBits * 2);
this._model4 = CreateModel(0, maxBitLength > 24 ? 24 : maxBitLength);
this._model5 = CreateModel(0, maxBitLength > 36 ? 36 : maxBitLength);
this._model6 = CreateModel(0, maxBitLength);
this._model6len = CreateModel(0, 27);
// Initialze the selector model
this._selector = CreateModel(0, 7);
// Initialize coding state
this.CS_H = 0;
this.CS_L = 0;
this.CS_C = 0;
}
/// <summary>
/// Create a new Decompressor from a Stream
/// </summary>
/// <param name="input">Stream to decompress</param>
/// <param name="windowBits">Number of bits in the sliding window</param>
#if NET48
public Decompressor(Stream input, uint windowBits)
#else
public Decompressor(Stream? input, uint windowBits)
#endif
{
// If we have an invalid stream
if (input == null || !input.CanRead || !input.CanSeek)