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#ifndef GMIO_INTERNAL_BYTE_SWAP_H
#define GMIO_INTERNAL_BYTE_SWAP_H

#include "../global.h"

#ifdef GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC
#  include <stdlib.h>
#endif

/*! Returns \p val with the order of bytes reversed, uses compiler builtin
 *  functions if available */
GMIO_INLINE uint16_t gmio_uint16_bswap(uint16_t val)
{
#ifdef GMIO_HAVE_GCC_BUILTIN_BSWAP16_FUNC
    return __builtin_bswap16(val);
#elif defined(GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
    return _byteswap_ushort(val);
#else
    return ((val & 0x00FF) << 8) | ((val >> 8) & 0x00FF);
#endif
}

/*! Returns \p val with the order of bytes reversed, uses compiler builtin
 *  functions if available */
GMIO_INLINE uint32_t gmio_uint32_bswap(uint32_t val)
{
#ifdef GMIO_HAVE_GCC_BUILTIN_BSWAP32_FUNC
    return __builtin_bswap32(val);
#elif defined(GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC)
    return _byteswap_ulong(val);
#else
    return
            ((val & 0x000000FF) << 24)
            | ((val & 0x0000FF00) << 8)
            | ((val >> 8) & 0x0000FF00)
            | ((val >> 24) & 0x000000FF);
#endif
}

#endif /* GMIO_INTERNAL_BYTE_SWAP_H */