[Boost-users] Binary (non-character-based) file iterators

I'm looking for binary (value_type = unsigned char) input and output iterators for files. This is as opposed to a character base iterator (which rules out ostream_iterator<>). I don't need anything fancy (in fact, I'm just copying whole files to and from archives). I know that Sprit has an input iterator which is a forward iterator, and I could use that. I've already started to write them with Boost.Iterator; but this seems like something you should expect to find somewhere in boost already.