/// <summary>
/// Initializes a new instance of the <see cref="ZlibOutputStream"/> class.
/// </summary>
/// <param name="output">The output stream.</param>
/// <param name="level">The compression level for the data to compress.</param>
public ZlibOutputStream(Stream output, ZlibCompressionLevel level)
{
this.BaseStream = output;
this.InitBlock();
_ = this.zStream.DeflateInit(level);
this.compress = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="ZlibInputStream"/> class.
/// </summary>
/// <param name="input">The input stream.</param>
/// <param name="level">The compression level for the data to compress.</param>
public ZlibInputStream(Stream input, ZlibCompressionLevel level)
{
this.BaseStream = input;
this.InitBlock();
_ = this.zStream.DeflateInit(level);
this.compress = true;
this.zStream.INextIn = this.chunkBuffer;
this.zStream.NextInIndex = 0;
this.zStream.AvailIn = 0;
}
public void EncodeDecode(ZlibCompressionLevel compression)
{
const int count = 2 * 4096 * 4;
var expected = GetBuffer(count);
var reference = new byte[count];
var actual = new byte[count];
using (var compressed = new MemoryStream())
{
using (var deflate = new ZlibOutputStream(compressed, compression))
{
deflate.Write(expected);
}
compressed.Position = 0;
using (var refInflate = new InflaterInputStream(compressed))
{
refInflate.IsStreamOwner = false;
refInflate.Read(reference);
}
compressed.Position = 0;
using (var inflate = new ZlibInputStream(compressed))
{
inflate.Read(actual);
}
}
for (int i = 0; i < expected.Length; i++)
{
byte e = expected[i];
byte r = reference[i];
byte a = actual[i];
Assert.Equal(e, r);
Assert.Equal(e, a);
}
}
/// <summary>
/// Sets the compression paramiters.
/// </summary>
/// <param name="level">The compression level to use.</param>
/// <param name="strategy">The strategy to use for compression.</param>
/// <returns>The zlib status state.</returns>
public ZlibCompressionState DeflateParams(ZlibCompressionLevel level, ZlibCompressionStrategy strategy)
=> this.Dstate == null
? ZlibCompressionState.ZSTREAMERROR
: this.Dstate.DeflateParams(this, level, strategy);
/// <summary>
/// Initializes compression.
/// </summary>
/// <param name="level">The compression level to use.</param>
/// <param name="bits">The window bits to use.</param>
/// <returns>The zlib status state.</returns>
public ZlibCompressionState DeflateInit(ZlibCompressionLevel level, int bits)
{
this.Dstate = new Deflate();
return(this.Dstate.DeflateInit(this, level, bits));
}
/// <summary> /// Initializes compression. /// </summary> /// <param name="level">The compression level to use.</param> /// <returns>The zlib status state.</returns> public ZlibCompressionState DeflateInit(ZlibCompressionLevel level) => this.DeflateInit(level, MAXWBITS);
