/// <summary>
/// See interface docs.
/// </summary>
/// <param name="bytes"></param>
/// <param name="offset"></param>
/// <param name="bytesRead"></param>
/// <returns></returns>
public IEnumerable <ExtractedBytes> ExtractMessageBytes(byte[] bytes, int offset, int bytesRead)
{
var length = _ReadBufferLength + bytesRead;
if (_ReadBuffer == null || length > _ReadBuffer.Length)
{
var newReadBuffer = new byte[length];
if (_ReadBuffer != null)
{
_ReadBuffer.CopyTo(newReadBuffer, 0);
}
_ReadBuffer = newReadBuffer;
}
Array.ConstrainedCopy(bytes, offset, _ReadBuffer, _ReadBufferLength, bytesRead);
_ReadBufferLength = length;
var bufferEntirelyUsed = true;
for (var i = 0; i < _ReadBufferLength;)
{
var lengthRemaining = _ReadBufferLength - i;
var packetLength = (int)_ReadBuffer[i];
if (packetLength > lengthRemaining)
{
bufferEntirelyUsed = false;
for (int si = i, di = 0; si < _ReadBufferLength; ++si, ++di)
{
_ReadBuffer[di] = _ReadBuffer[si];
}
_ReadBufferLength -= i;
break;
}
else
{
var packet = new byte[packetLength];
Array.ConstrainedCopy(_ReadBuffer, i, packet, 0, packetLength);
_ExtractedBytes.ChecksumFailed = !_Compressor.IsCompressedMessage(packet);
_ExtractedBytes.Bytes = _ExtractedBytes.ChecksumFailed ? null : packet;
_ExtractedBytes.Length = _ExtractedBytes.ChecksumFailed ? 0 : packetLength;
yield return(_ExtractedBytes);
i += _ExtractedBytes.ChecksumFailed ? 1 : packetLength;
}
}
if (bufferEntirelyUsed)
{
_ReadBufferLength = 0;
}
}
public void BaseStationMessageCompressor_IsCompressedMessage_Returns_True_If_Bytes_Represent_Compressed_Message()
{
Assert.IsTrue(_Compressor.IsCompressedMessage(_Compressor.Compress(_Message)));
}