public override async ValueTask <int> ReadAsync(byte[] buffer, int offset, int length, CancellationToken cancellationToken)
{
CheckNotDisposed();
ValidateBufferArgs(buffer, offset, length);
if (!IsOpen)
{
throw new TTransportException(TTransportException.ExceptionType.NotOpen);
}
// do we have something buffered?
var count = ReadBuffer.Length - ReadBuffer.Position;
if (count > 0)
{
return(await ReadBuffer.ReadAsync(buffer, offset, length, cancellationToken));
}
// does the request even fit into the buffer?
// Note we test for >= instead of > to avoid nonsense buffering
if (length >= ReadBuffer.Capacity)
{
return(await InnerTransport.ReadAsync(buffer, offset, length, cancellationToken));
}
// buffer a new chunk of bytes from the underlying transport
ReadBuffer.Length = ReadBuffer.Capacity;
ArraySegment <byte> bufSegment;
ReadBuffer.TryGetBuffer(out bufSegment);
ReadBuffer.Length = await InnerTransport.ReadAsync(bufSegment.Array, 0, bufSegment.Count, cancellationToken);
ReadBuffer.Position = 0;
// deliver the bytes
return(await ReadBuffer.ReadAsync(buffer, offset, length, cancellationToken));
}