private static Stream ToStream <T>(int version, ItemBase <T> item) where T : ItemBase <T> { Stream stream = null; try { stream = new RangeStream(item.Export(_bufferManager)); var dic = new Dictionary <byte, Stream>(); try { stream.Seek(0, SeekOrigin.Begin); BufferStream deflateBufferStream = null; try { deflateBufferStream = new BufferStream(_bufferManager); using (var deflateStream = new DeflateStream(deflateBufferStream, CompressionMode.Compress, true)) using (var safeBuffer = _bufferManager.CreateSafeBuffer(1024 * 4)) { int length; while ((length = stream.Read(safeBuffer.Value, 0, safeBuffer.Value.Length)) > 0) { deflateStream.Write(safeBuffer.Value, 0, length); } } deflateBufferStream.Seek(0, SeekOrigin.Begin); dic.Add((byte)ConvertCompressionAlgorithm.Deflate, deflateBufferStream); } catch (Exception) { if (deflateBufferStream != null) { deflateBufferStream.Dispose(); } } } catch (Exception) { } dic.Add((byte)ConvertCompressionAlgorithm.None, stream); var list = dic.ToList(); list.Sort((x, y) => { int c = x.Value.Length.CompareTo(y.Value.Length); if (c != 0) { return(c); } return(x.Key.CompareTo(y.Key)); }); for (int i = 1; i < list.Count; i++) { list[i].Value.Dispose(); } var headerStream = new BufferStream(_bufferManager); VintUtils.SetUInt64(headerStream, (uint)version); VintUtils.SetUInt64(headerStream, list[0].Key); var dataStream = new UniteStream(headerStream, list[0].Value); var crcStream = new MemoryStream(Crc32_Castagnoli.ComputeHash(new WrapperStream(dataStream, true))); return(new UniteStream(dataStream, crcStream)); } catch (Exception ex) { if (stream != null) { stream.Dispose(); } throw new ArgumentException(ex.Message, ex); } }
private static Stream ToStream <T>(ItemBase <T> item) where T : ItemBase <T> { Stream stream = null; try { stream = new RangeStream(item.Export(_bufferManager)); List <KeyValuePair <byte, Stream> > list = new List <KeyValuePair <byte, Stream> >(); try { stream.Seek(0, SeekOrigin.Begin); BufferStream deflateBufferStream = null; try { deflateBufferStream = new BufferStream(_bufferManager); using (DeflateStream deflateStream = new DeflateStream(deflateBufferStream, CompressionMode.Compress, true)) { byte[] compressBuffer = null; try { compressBuffer = _bufferManager.TakeBuffer(1024 * 4); int i = -1; while ((i = stream.Read(compressBuffer, 0, compressBuffer.Length)) > 0) { deflateStream.Write(compressBuffer, 0, i); } } finally { if (compressBuffer != null) { _bufferManager.ReturnBuffer(compressBuffer); } } } deflateBufferStream.Seek(0, SeekOrigin.Begin); list.Add(new KeyValuePair <byte, Stream>((byte)ConvertCompressionAlgorithm.Deflate, deflateBufferStream)); } catch (Exception) { if (deflateBufferStream != null) { deflateBufferStream.Dispose(); } } } catch (Exception) { } list.Add(new KeyValuePair <byte, Stream>((byte)ConvertCompressionAlgorithm.None, stream)); list.Sort((x, y) => { int c = x.Value.Length.CompareTo(y.Value.Length); if (c != 0) { return(c); } return(x.Key.CompareTo(y.Key)); }); #if DEBUG if (list[0].Value.Length != stream.Length) { Debug.WriteLine("AmoebaConverter ToStream : {0}→{1} {2}", NetworkConverter.ToSizeString(stream.Length), NetworkConverter.ToSizeString(list[0].Value.Length), NetworkConverter.ToSizeString(list[0].Value.Length - stream.Length)); } #endif for (int i = 1; i < list.Count; i++) { list[i].Value.Dispose(); } BufferStream headerStream = new BufferStream(_bufferManager); headerStream.WriteByte((byte)list[0].Key); var dataStream = new UniteStream(headerStream, list[0].Value); MemoryStream crcStream = new MemoryStream(Crc32_Castagnoli.ComputeHash(dataStream)); return(new UniteStream(dataStream, crcStream)); } catch (Exception ex) { if (stream != null) { stream.Dispose(); } throw new ArgumentException(ex.Message, ex); } }