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#ifndef _SWAB_H
#define _SWAB_H
/*
* linux/byteorder/swab.h
* Byte-swapping, independently from CPU endianness
* swabXX[ps]?(foo)
*
* Francois-Rene Rideau <fare@tunes.org> 19971205
* separated swab functions from cpu_to_XX,
* to clean up support for bizarre-endian architectures.
*
* See asm-i386/byteorder.h and suches for examples of how to provide
* architecture-dependent optimized versions
*
*/
#if !defined(__APPLE__) && !defined(__NetBSD__)
#define ntohl(x) (is_big_endian() ? (uint32_t)(x) : swab32(x))
#define htonl(x) (is_big_endian() ? (uint32_t)(x) : swab32(x))
#else
#include <arpa/inet.h>
#endif
#define ntohll(x) (is_big_endian() ? (uint64_t)(x) : swab64(x))
#define htonll(x) (is_big_endian() ? (uint64_t)(x) : swab64(x))
/* casts are necessary for constants, because we never know how for sure
* how U/UL/ULL map to __u16, __u32, __u64. At least not in a portable way.
*/
#define swab16(x) \
((unsigned short)( \
(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
(((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
#define swab32(x) \
((unsigned int)( \
(((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
(((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
(((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
(((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
#define swab64(x) \
((uint64_t)( \
(((uint64_t)(x) & (uint64_t)0x00000000000000ffULL) << 56) | \
(((uint64_t)(x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
(((uint64_t)(x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
(((uint64_t)(x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
(((uint64_t)(x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56) ))
/* common.c */
int is_big_endian(void);
#endif /* _SWAB_H */
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