/usr/include/newlib/machine/endian.h is in libnewlib-dev 2.4.0.20160527-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | #ifndef __MACHINE_ENDIAN_H__
#define __MACHINE_ENDIAN_H__
#include <sys/cdefs.h>
#include <sys/_types.h>
#include <machine/_endian.h>
#if _BYTE_ORDER == _LITTLE_ENDIAN
#define _QUAD_HIGHWORD 1
#define _QUAD_LOWWORD 0
#else
#define _QUAD_HIGHWORD 0
#define _QUAD_LOWWORD 1
#endif
#if __BSD_VISIBLE
#define LITTLE_ENDIAN _LITTLE_ENDIAN
#define BIG_ENDIAN _BIG_ENDIAN
#define PDP_ENDIAN _PDP_ENDIAN
#define BYTE_ORDER _BYTE_ORDER
#endif
#ifdef __GNUC__
#define __bswap16(_x) __builtin_bswap16(_x)
#define __bswap32(_x) __builtin_bswap32(_x)
#define __bswap64(_x) __builtin_bswap64(_x)
#else /* __GNUC__ */
static __inline __uint16_t
__bswap16(__uint16_t _x)
{
return ((__uint16_t)((_x >> 8) | ((_x << 8) & 0xff00)));
}
static __inline __uint32_t
__bswap32(__uint32_t _x)
{
return ((__uint32_t)((_x >> 24) | ((_x >> 8) & 0xff00) |
((_x << 8) & 0xff0000) | ((_x << 24) & 0xff000000)));
}
static __inline __uint64_t
__bswap64(__uint64_t _x)
{
return ((__uint64_t)((_x >> 56) | ((_x >> 40) & 0xff00) |
((_x >> 24) & 0xff0000) | ((_x >> 8) & 0xff000000) |
((_x << 8) & ((__uint64_t)0xff << 32)) |
((_x << 24) & ((__uint64_t)0xff << 40)) |
((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56))));
}
#endif /* !__GNUC__ */
#ifndef __machine_host_to_from_network_defined
#if _BYTE_ORDER == _LITTLE_ENDIAN
#define __htonl(_x) __bswap32(_x)
#define __htons(_x) __bswap16(_x)
#define __ntohl(_x) __bswap32(_x)
#define __ntohs(_x) __bswap16(_x)
#else
#define __htonl(_x) ((__uint32_t)(_x))
#define __htons(_x) ((__uint16_t)(_x))
#define __ntohl(_x) ((__uint32_t)(_x))
#define __ntohs(_x) ((__uint16_t)(_x))
#endif
#endif /* __machine_host_to_from_network_defined */
#endif /* __MACHINE_ENDIAN_H__ */
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