103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/* $NetBSD: endian.h,v 1.7 1994/10/26 08:24:25 cgd Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1987, 1991 Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)endian.h 7.8 (Berkeley) 4/3/91
|
|
*/
|
|
|
|
#ifndef _MACHINE_ENDIAN_H_
|
|
#define _MACHINE_ENDIAN_H_
|
|
|
|
/*
|
|
* Define the order of 32-bit words in 64-bit words.
|
|
*/
|
|
#define _QUAD_HIGHWORD 1
|
|
#define _QUAD_LOWWORD 0
|
|
|
|
#ifndef _POSIX_SOURCE
|
|
/*
|
|
* Definitions for byte order, according to byte significance from low
|
|
* address to high.
|
|
*/
|
|
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax, ns32000 */
|
|
#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
|
|
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
|
|
|
|
#define BYTE_ORDER LITTLE_ENDIAN
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__BEGIN_DECLS
|
|
unsigned long htonl __P((unsigned long));
|
|
unsigned short htons __P((unsigned short));
|
|
unsigned long ntohl __P((unsigned long));
|
|
unsigned short ntohs __P((unsigned short));
|
|
__END_DECLS
|
|
|
|
|
|
#ifdef __GNUC__
|
|
|
|
#define __byte_swap_long(x) \
|
|
({ register unsigned long __x = (x); \
|
|
__asm ("rotw 8,%1; rotd 16,%1; rotw 8,%1" \
|
|
: "=r" (__x) \
|
|
: "0" (__x)); \
|
|
__x; })
|
|
|
|
#define __byte_swap_word(x) \
|
|
({ register unsigned short __x = (x); \
|
|
__asm ("rotw 8,%1" \
|
|
: "=r" (__x) \
|
|
: "0" (__x)); \
|
|
__x; })
|
|
|
|
#define ntohl(x) __byte_swap_long(x)
|
|
#define ntohs(x) __byte_swap_word(x)
|
|
#define htonl(x) __byte_swap_long(x)
|
|
#define htons(x) __byte_swap_word(x)
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
|
|
/*
|
|
* Macros for network/external number representation conversion.
|
|
*/
|
|
#define NTOHL(x) (x) = ntohl((u_long)x)
|
|
#define NTOHS(x) (x) = ntohs((u_short)x)
|
|
#define HTONL(x) (x) = htonl((u_long)x)
|
|
#define HTONS(x) (x) = htons((u_short)x)
|
|
|
|
#endif /* _POSIX_SOURCE */
|
|
|
|
#endif /* _MACHINE_ENDIAN_H_ */
|