Windows/MSVC has _byteswap_ushort(), _byteswap_ulong(), _byteswap_uint64(). (note that unsigned long is 32 bits on Windows) It's ugly but it works. Boost provi

Windows/MSVC has _byteswap_ushort(), _byteswap_ulong(), _byteswap_uint64(). (note that unsigned long is 32 bits on Windows) It's ugly but it works. Boost provides boost::endian which allows converting between native and big or little, which just does the right thing on all architectures and compilers and compiles down to a no-op or bswap instruction instruction. It's much better than writing (and testing!) your own giant pile macros and ifdefs to detect the compiler/architecture/OS, include the correct includes, and perform the correct conversions in the correct places.