Templated Endian Swapping

#include <type_traits>

// Warning: Untested :P
namespace util
{
    template< typename T, size_t S = sizeof( T ) >
    typename std::enable_if< std::is_integral< T >::value, T >::type
    SwapBytes( T t )
    {
        T toReturn;

        for ( size_t i = 0; i < S; ++i )
        {
            sf::Uint8 byte = ( t >> ( i * 8 ) ) & 0xff;
            toReturn += byte << ( ( S - 1 - i ) * 8 );
        }

        return toReturn;
    }

    template< typename T, size_t S = sizeof( T ) >
    typename std::enable_if< std::is_floatingpoint< T >::value, T >::type
    SwapBytes( T t )
    {
        union
        {
            T f2;
            unsigned char b[ S ];
        } dat1, dat2;

        dat1.f2 = t;
        for ( size_t i = 0; i < S; ++i )
        {
            dat2.b[ i ] = dat1.b[ S - 1 - i ];
        }

        return dat2.f2;
    }
}