/// <summary>
/// Compresses data using an specific compression level.
/// </summary>
/// <param name="inData">The original input data.</param>
/// <param name="outData">The compressed output data.</param>
/// <param name="level">The compression level to use.</param>
/// <param name="adler32">The output adler32 of the data.</param>
/// <exception cref="NotPackableException">
/// Thrown when the internal compression stream errors in any way.
/// </exception>
public static void Compress(byte[] inData, out byte[] outData, ZlibCompression level, out int adler32)
{
using (var outMemoryStream = new MemoryStream())
using (var outZStream = new ZOutputStream(outMemoryStream, level))
using (Stream inMemoryStream = new MemoryStream(inData))
{
try
{
inMemoryStream.CopyTo(outZStream);
}
catch (ZStreamException)
{
// the compression or decompression failed.
}
try
{
outZStream.Flush();
}
catch (StackOverflowException ex)
{
throw new NotPackableException("Compression Failed due to a stack overflow.", ex);
}
try
{
outZStream.Finish();
}
catch (ZStreamException ex)
{
throw new NotPackableException("Compression Failed.", ex);
}
outData = outMemoryStream.ToArray();
adler32 = (int)(outZStream.Z.Adler & 0xffff);
}
}
/// <summary>
/// Decompresses data.
/// </summary>
/// <param name="inData">The compressed input data.</param>
/// <param name="outData">The decompressed output data.</param>
/// <exception cref="NotUnpackableException">
/// Thrown when the internal decompression stream errors in any way.
/// </exception>
public static void Decompress(byte[] inData, out byte[] outData)
{
using (var outMemoryStream = new MemoryStream())
using (var outZStream = new ZOutputStream(outMemoryStream))
using (Stream inMemoryStream = new MemoryStream(inData))
{
try
{
inMemoryStream.CopyTo(outZStream);
}
catch (ZStreamException)
{
// the compression or decompression failed.
}
try
{
outZStream.Flush();
}
catch (StackOverflowException ex)
{
throw new NotPackableException("Decompression Failed due to a stack overflow.", ex);
}
try
{
outZStream.Finish();
}
catch (ZStreamException ex)
{
throw new NotUnpackableException("Decompression Failed.", ex);
}
outData = outMemoryStream.ToArray();
}
}
