Hi, I've been trying to implement the RFB (VNC) protocol and I was exploring a neat way of parsing the protocol bytestream. The protocol specifies that the client first sends a byte that identifies the command then a sequence of word8, word16, word32 and paddings. I've tried to capture that logic with the function below. commandFormat :: Word8 -> [Int] -- 0 for padding bytes commandFormat c | c == setPixelFormat = [0,0,0,1,1,1,1,2,2,2,1,1,1,0,0,0] | c == setEncodings = [0,2] | c == framebufferUpdateRequest = [0,2,2,2,2] | c == keyEvent = [1,2,4] | c == pointerEvent = [1,2,2] | c == clientCutText = [0,0,0,4] | otherwise = [] What I am struggling with is a function like this - parseCommand :: Word8 -> ByteStream -> [Int] parseCommand command byteStream = ... I want the function to use the commandFormat above and return me a list of integers -- for example - if the command is keyEvent and the bytestream is "<1> <0> <2> <0> <0> <0> <3>" The output should be -> [1,2,3]!!! -> That way, I can process it easily. I'd appreciate some help on this very much. -- Regards, Kashyap