EndianConversion.hpp

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#pragma once
#ifndef BIL_ENDIANCONVERSION_HPP
#define BIL_ENDIANCONVERSION_HPP

#include <boost/cstdint.hpp>


namespace bil {

    inline boost::uint16_t swapBigLittleEndian(const boost::uint16_t& x)
    {
        return (x >> 8) |
               (x << 8);
    }

    inline boost::uint32_t swapBigLittleEndian(const boost::uint32_t& x)
    {
        return (x >> 24) |
               (x << 24) |
               ((x >> 8) & 0x0000ff00) |
               ((x << 8) & 0x00ff0000);
    }

    inline boost::uint64_t swapBigLittleEndian(const boost::uint64_t& x)
    {
        return (x >> 56) |
               (x << 56) |
               ((x >> 40) & 0x000000000000ff00) |
               ((x << 40) & 0x00ff000000000000) |
               ((x >> 24) & 0x0000000000ff0000) |
               ((x << 24) & 0x0000ff0000000000) |
               ((x >> 8)  & 0x00000000ff000000) |
               ((x << 8)  & 0x000000ff00000000);
    }


    template <typename type>
    inline type swapBigEndian(const type& x)
    {
#ifdef __LITTLE_ENDIAN__
        return swapBigLittleEndian(x);
#elif defined(__BIG_ENDIAN__)
        return x;
#else
#error Unsupported endianess: Define __LITTLE_ENDIAN__ or __BIG_ENDIAN__!
#endif
    }

    template <typename type>
    inline type swapLittleEndian(const type& x)
    {
#ifdef __LITTLE_ENDIAN__
        return x;
#elif defined(__BIG_ENDIAN__)
        swapBigLittleEndian(x);
#else
#error Unsupported endianess: Define __LITTLE_ENDIAN__ or __BIG_ENDIAN__!
#endif
    }

}

#endif