This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r
DestinationBuffer. The implementation must be reentrant, and it must handle the case\r
where SourceBuffer overlaps DestinationBuffer.\r
This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r
DestinationBuffer. The implementation must be reentrant, and it must handle the case\r
where SourceBuffer overlaps DestinationBuffer.\r