public void ResetRead()
{
_receiveBytesLeft = -1;
_stateLength = -1;
_state = ErrorFrameState.Flags;
_readPayloadBuffer = WriterContext.EmptySegment;
_readOffset = 0;
}
public bool Read(byte[] buffer, ref int offset, ref int bytesToProcess)
{
var numberOfBytesTransferredFromStart = bytesToProcess;
var allCompleted = false;
while (bytesToProcess > 0 && !allCompleted)
{
bool isBufferCopyCompleted;
switch (_state)
{
case ErrorFrameState.Flags:
if (buffer[offset] == 32)
{
throw new BackTrackException("", offset);
}
_flags = (FrameFlags)buffer[offset];
_state = ErrorFrameState.Length;
++offset;
--bytesToProcess;
_receiveBytesLeft = 4;
break;
case ErrorFrameState.Length:
if ((_flags & FrameFlags.LargeFrame) == 0)
{
_messageLength = buffer[offset];
++offset;
--bytesToProcess;
}
else
{
isBufferCopyCompleted = CopyToReadBuffer(buffer, ref offset, ref bytesToProcess);
if (isBufferCopyCompleted)
{
if (BitConverter.IsLittleEndian)
{
Array.Reverse(_readBuffer, 0, 4);
}
_messageLength = BitConverter.ToInt32(_readBuffer, 0);
}
}
_receiveBytesLeft = _messageLength;
_state = ErrorFrameState.Message;
break;
case ErrorFrameState.Message:
isBufferCopyCompleted = CopyToReadBuffer(buffer, ref offset, ref bytesToProcess);
if (isBufferCopyCompleted)
{
ErrorMessage = Encoding.UTF8.GetString(_readBuffer, 0, _messageLength);
allCompleted = true;
}
break;
}
}
if (offset < 0)
{
throw new InvalidOperationException();
}
return(allCompleted);
}