I wrote an endian library on the flight back from boostcon but it has taken a little time to clear the submission with the firm. I realize that Beman's endian swapper library is already in the review queue but I hope my approach is different and interesting enough to warrant consideration. It's located here in the vault (Utilities/endian-puverle.zip): http://www.boostpro.com/vault/index.php?action=downloadfile&filename=endian-puverle.zip&directory=Utilities& The highlights of the library are the following: - Very simple interface: swap<machine_to_little/big>(), swap_in_place<machine_to_little/big>() - Support for built-in and user-defined data types and ranges thereof. E.g. you can swap ranges of structs containing/deriving from other structs - endian::iterator, which will iterate across a range swapping values as necessary. It works with any swappable type. The library is described/documented/tested in the file main.cpp at the root of the zip archive. Unfinished items: - Right now, the library only includes the "vanilla" swapper, meaning it doesn't take advantage of special instructions on architectures which natively support endian conversion. I didn't include this in order to prevent cluttering the code with #ifdefs. This functionality would, however, be part of the final library. - Ideally, the metafunction is_mutable_range<> should be moved out of endian::detail and become part of Boost.Range of Boost.TypeTraits. I have donned by bulletproof vest and I'm ready for any feedback you may have. :) Tom