UltimateZoneBuilder/Source/Core/GZBuilder/Data/SharpCompressHelper.cs

using System.IO;
using SharpCompress.Compressor;
using SharpCompress.Compressor.BZip2;

namespace CodeImp.DoomBuilder.GZBuilder.Data
{
    internal static class SharpCompressHelper
    {
        internal static MemoryStream CompressStream(Stream stream) {
            byte[] arr = new byte[stream.Length];
            stream.Read(arr, 0, (int)stream.Length);

            MemoryStream ms = new MemoryStream();
            BZip2Stream bzip = new BZip2Stream(ms, CompressionMode.Compress, true);

            bzip.Write(arr, 0, arr.Length);
            bzip.Close();

            return ms;
        }

        internal static MemoryStream DecompressStream(Stream stream) {
            BZip2Stream bzip = new BZip2Stream(stream, CompressionMode.Decompress, false);

            byte[] buffer = new byte[16 * 1024];
            MemoryStream ms = new MemoryStream();

            int read;
            while ((read = bzip.Read(buffer, 0, buffer.Length)) > 0)
                ms.Write(buffer, 0, read);

            return ms;
        }
    }
}