Userspace example with priority.
/*****************************************************************************
*
* $Id$
*
****************************************************************************/
#include <sys/types.h>
/*****************************************************************************/
#define swap16(x) \
((uint16_t)( \
(((uint16_t)(x) & 0x00ffU) << 8) | \
(((uint16_t)(x) & 0xff00U) >> 8) ))
#define swap32(x) \
((uint32_t)( \
(((uint32_t)(x) & 0x000000ffUL) << 24) | \
(((uint32_t)(x) & 0x0000ff00UL) << 8) | \
(((uint32_t)(x) & 0x00ff0000UL) >> 8) | \
(((uint32_t)(x) & 0xff000000UL) >> 24) ))
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define le16tocpu(x) x
#define le32tocpu(x) x
#define cputole16(x) x
#define cputole32(x) x
#elif __BYTE_ORDER == __BIG_ENDIAN
#define le16tocpu(x) swap16(x)
#define le32tocpu(x) swap32(x)
#define cputole16(x) swap16(x)
#define cputole32(x) swap32(x)
#endif
/****************************************************************************/