alberto-mco/zlib

.Net ZLib implementation

ZLib

.Net ZLib implementation

My ZLib implementation has 3 classes:

• ZLibStream.cs
• ZLibHeader.cs
• Adler32.cs

ZlibStream
This class contains the I/O functions to correctly read or write the ZLib stream. Also, it has the control to determine if it's a supported ZLib stream or not.

ZLibHeader
The ZlibHeader class has the functions for encode or decode the ZLib header.

Adler32
This class has the functions for check the hash in Adler32. The result determines if the stream is correct or not.

How to compress using the library

Using System.IO.Compression;
Using ZLib;

.
.
.

OpenFileDialog dlgOpen = new OpenFileDialog();
CompressionLevel level = CompressionLevel.Optimal;

if (dlgOpen.ShowDialog() == DialogResult.OK)
{
    using (FileStream fsSource = new FileStream(dlgOpen.FileName, FileMode.Open, FileAccess.Read))
    {
        using (FileStream fsTarget = new FileStream(dlgOpen.FileName + ".zlib", FileMode.Create, FileAccess.Write))
        {
            using (ZLIBStream zs = new ZLIBStream(fsTarget, level, true))
            {
                int bytesLeidos = 0;
                byte[] buffer = new byte[1024];

                while ((bytesLeidos = fsSource.Read(buffer, 0, buffer.Length)) > 0) 
                {
                    zs.Write(buffer, 0,bytesLeidos);                        
                }
            }
        }
    }
}

How to decompress using the library

Using System.IO.Compression;
Using ZLib;

.
.
.

OpenFileDialog dlgOpen = new OpenFileDialog();

if (dlgOpen.ShowDialog() == DialogResult.OK)
{ 
    using (FileStream fsSource = new FileStream(dlgOpen.FileName, FileMode.Open, FileAccess.Read))
    {
        using (ZLIBStream zs = new ZLIBStream(fsSource, CompressionMode.Decompress, true))
        {
            using (FileStream fsTarget = new FileStream(dlgOpen.FileName + ".txt", FileMode.Create, FileAccess.Write))
            {
                int bytesLeidos = 0;
                byte[] buffer = new byte[1024];

                while ((bytesLeidos = zs.Read(buffer, 0, buffer.Length)) > 0)
                {
                    fsTarget.Write(buffer, 0, bytesLeidos);
                }
            }
        }
    }
}