The Compressor and Decompressor classes can be derived from to create custom compressor and decompressor classes which implement custom compression and decompression algorithms.
Basic Steps
The only implementation required when creating a class that derives from the Compressor class is an override of the Compress method. The same goes when deriving from the Decompressor class, except that in this case it is the Decompress method that is overridden.
Demonstration
The following example demonstrates the minimum implementations required for classes that derive from the Compressor and Decompressor classes:
| VB.NET |
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Imports System
Imports Xceed.Compression
Namespace Xceed.Compression.Samples
Public Class CustomCompressor
Inherits Compressor
Public Overrides Function Compress( ByVal buffer As Byte(), _
ByVal offset As Integer, _
ByVal count As Integer, _
ByVal endOfData As Boolean, _
ByRef compressed As Byte() ) As Integer
'The compressed size in bytes should be returned
Return 0
End Function
End Class
Public Class CustomDecompressor
Inherits Decompressor
Public Overrides Decompress( ByVal buffer As Byte(), _
ByVal offset As Integer, _
ByVal count As Integer, _
ByVal endOfData As Boolean, _
ByRef decompressed As Byte(), _
ByRef remaining As Integer ) As Integer
'The decompressed size in bytes should be returned
Return 0
End Function
End Class
End Namespace
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| C# |
Copy Code |
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using System;
using Xceed.Compression;
namespace Xceed.Compression.Samples
{
public class CustomCompressor : Compressor
{
public override int Compress( byte[] buffer,
int offset,
int count,
bool endOfData,
out byte[] compressed )
{
// The compressed size in bytes should be returned.
return 0;
}
}
public class CustomDecompressor : Decompressor
{
public override int Decompress( byte[] buffer,
int offset,
int count,
ref bool endOfData,
out byte[] decompressed,
out int remaining )
{
// The decompressed size in bytes should be returned.
return 0;
}
}
}
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