Hi Everyone I want to implement a binary protocol that, unfortunately, has some alignment restrictions. In order to fulfill these, I need access to the "current offset" in the bytestring. The binary package does provide a function bytesRead :: Get Int64 but only for the Get monad; there is no equivalent for the Put monad. So my first question: is there a serialization library that offers something like bytesWritten :: PutM Int64 Failing that, would you think adding it to binary is a reasonable feature request? I have taken a cursory look at the implementation and it looks like this is not a matter of simply adding a missing function, but would probably need an addition to internal data structures. I could also try and wrap the PutM from binary with a StateT transformer and count the bytes myself. I will probably have to use at least a ReaderT wrapper anyway, since I have to pass the byte order as a parameter (byte order gets negotiated between client and server, it is not fixed). I was really hoping that there is some library that has built-in support for stateful serialization (alignment, byte-order, etc). Any pointers, hints, etc are much appreciated. Cheers -- Ben Franksen () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments