/// <summary> /// Deflate one batch of data. /// </summary> /// <remarks> /// You must have set InputBuffer and OutputBuffer before calling this method. /// </remarks> /// <example> /// <code> /// private void DeflateBuffer(CompressionLevel level) /// { /// int bufferSize = 1024; /// byte[] buffer = new byte[bufferSize]; /// ZlibCodec compressor = new ZlibCodec(); /// /// Console.WriteLine("\n============================================"); /// Console.WriteLine("Size of Buffer to Deflate: {0} bytes.", UncompressedBytes.Length); /// MemoryStream ms = new MemoryStream(); /// /// int rc = compressor.InitializeDeflate(level); /// /// compressor.InputBuffer = UncompressedBytes; /// compressor.NextIn = 0; /// compressor.AvailableBytesIn = UncompressedBytes.Length; /// /// compressor.OutputBuffer = buffer; /// /// // pass 1: deflate /// do /// { /// compressor.NextOut = 0; /// compressor.AvailableBytesOut = buffer.Length; /// rc = compressor.Deflate(FlushType.None); /// /// if (rc != ZlibConstants.Z_OK && rc != ZlibConstants.Z_STREAM_END) /// throw new Exception("deflating: " + compressor.Message); /// /// ms.Write(compressor.OutputBuffer, 0, buffer.Length - compressor.AvailableBytesOut); /// } /// while (compressor.AvailableBytesIn > 0 || compressor.AvailableBytesOut == 0); /// /// // pass 2: finish and flush /// do /// { /// compressor.NextOut = 0; /// compressor.AvailableBytesOut = buffer.Length; /// rc = compressor.Deflate(FlushType.Finish); /// /// if (rc != ZlibConstants.Z_STREAM_END && rc != ZlibConstants.Z_OK) /// throw new Exception("deflating: " + compressor.Message); /// /// if (buffer.Length - compressor.AvailableBytesOut > 0) /// ms.Write(buffer, 0, buffer.Length - compressor.AvailableBytesOut); /// } /// while (compressor.AvailableBytesIn > 0 || compressor.AvailableBytesOut == 0); /// /// compressor.EndDeflate(); /// /// ms.Seek(0, SeekOrigin.Begin); /// CompressedBytes = new byte[compressor.TotalBytesOut]; /// ms.Read(CompressedBytes, 0, CompressedBytes.Length); /// } /// </code> /// </example> /// <param name="flush">whether to flush all data as you deflate. Generally you will want to /// use Z_NO_FLUSH here, in a series of calls to Deflate(), and then call EndDeflate() to /// flush everything. /// </param> /// <returns>Z_OK if all goes well.</returns> public int Deflate(FlushType flush) { if (dstate == null) { throw new ZlibException("No Deflate State!"); } return(dstate.Deflate(flush)); }