public void Reset()
{
_messageBuffer = null;
_headerBytes = 0;
_packageLength = 0;
}
/// <summary>
/// Parses a stream chunking based on length-prefixed framing. Calls are re-entrant and hold state internally.
/// </summary>
/// <param name="bytes">A byte array of data to append</param>
private void Parse(ArraySegment<byte> bytes)
{
byte[] data = bytes.Array;
for (int i = bytes.Offset; i < bytes.Offset + bytes.Count; )
{
if (_headerBytes < PrefixLength)
{
_packageLength |= (data[i] << (_headerBytes * 8)); // little-endian order
++_headerBytes;
i += 1;
if (_headerBytes == PrefixLength)
{
if (_packageLength <= 0 || _packageLength > _maxPackageSize)
{
Log.Error("FRAMING ERROR! Data:\n{0}", Utils.Helper.FormatBinaryDump(bytes));
throw new PackageFramingException(string.Format("Package size is out of bounds: {0} (max: {1}).",
_packageLength, _maxPackageSize));
}
_messageBuffer = new BufferPool(_bufferManager);
}
}
else
{
int copyCnt = Math.Min(bytes.Count + bytes.Offset - i, _packageLength - _messageBuffer.Length);
_messageBuffer.Append(bytes.Array, i, copyCnt);
i += copyCnt;
if (_messageBuffer.Length == _packageLength)
{
if (_receivedHandler != null)
_receivedHandler(_messageBuffer);
_messageBuffer = null;
_headerBytes = 0;
_packageLength = 0;
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="BufferPoolStream"/> class.
/// </summary>
/// <param name="bufferPool">The buffer pool used as underlying storage.</param>
public BufferPoolStream(BufferPool bufferPool)
{
if (bufferPool == null)
throw new ArgumentNullException("bufferPool");
_bufferPool = bufferPool;
}