Home | History | Annotate | Line # | Download | only in include
endian.h revision 1.10.2.1
      1       1.1      cgd /*
      2       1.1      cgd  * Copyright (c) 1987, 1991 Regents of the University of California.
      3       1.1      cgd  * All rights reserved.
      4       1.1      cgd  *
      5       1.1      cgd  * Redistribution and use in source and binary forms, with or without
      6       1.1      cgd  * modification, are permitted provided that the following conditions
      7       1.1      cgd  * are met:
      8       1.1      cgd  * 1. Redistributions of source code must retain the above copyright
      9       1.1      cgd  *    notice, this list of conditions and the following disclaimer.
     10       1.1      cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11       1.1      cgd  *    notice, this list of conditions and the following disclaimer in the
     12       1.1      cgd  *    documentation and/or other materials provided with the distribution.
     13       1.1      cgd  * 3. All advertising materials mentioning features or use of this software
     14       1.1      cgd  *    must display the following acknowledgement:
     15       1.1      cgd  *	This product includes software developed by the University of
     16       1.1      cgd  *	California, Berkeley and its contributors.
     17       1.1      cgd  * 4. Neither the name of the University nor the names of its contributors
     18       1.1      cgd  *    may be used to endorse or promote products derived from this software
     19       1.1      cgd  *    without specific prior written permission.
     20       1.1      cgd  *
     21       1.1      cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22       1.1      cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23       1.1      cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24       1.1      cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25       1.1      cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26       1.1      cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27       1.1      cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28       1.1      cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29       1.1      cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30       1.1      cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31       1.1      cgd  * SUCH DAMAGE.
     32       1.1      cgd  *
     33       1.3      cgd  *	from: @(#)endian.h	7.8 (Berkeley) 4/3/91
     34  1.10.2.1      cgd  *	$Id: endian.h,v 1.10.2.1 1994/07/15 22:17:37 cgd Exp $
     35       1.1      cgd  */
     36       1.5  mycroft 
     37       1.6  mycroft #ifndef _MACHINE_ENDIAN_H_
     38       1.6  mycroft #define _MACHINE_ENDIAN_H_
     39       1.6  mycroft 
     40       1.5  mycroft /*
     41       1.5  mycroft  * Define the order of 32-bit words in 64-bit words.
     42       1.5  mycroft  */
     43       1.5  mycroft #define _QUAD_HIGHWORD 1
     44       1.5  mycroft #define _QUAD_LOWWORD 0
     45       1.1      cgd 
     46       1.6  mycroft 
     47       1.6  mycroft #ifndef _POSIX_SOURCE
     48       1.1      cgd /*
     49       1.1      cgd  * Definitions for byte order, according to byte significance from low
     50       1.1      cgd  * address to high.
     51       1.1      cgd  */
     52       1.1      cgd #define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
     53       1.1      cgd #define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
     54       1.1      cgd #define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
     55       1.1      cgd 
     56       1.1      cgd #define	BYTE_ORDER	LITTLE_ENDIAN
     57       1.1      cgd 
     58       1.1      cgd #include <sys/cdefs.h>
     59       1.1      cgd 
     60       1.4      jtc __BEGIN_DECLS
     61       1.4      jtc unsigned long   htonl __P((unsigned long));
     62       1.4      jtc unsigned short  htons __P((unsigned short));
     63       1.4      jtc unsigned long   ntohl __P((unsigned long));
     64       1.4      jtc unsigned short  ntohs __P((unsigned short));
     65       1.4      jtc __END_DECLS
     66       1.4      jtc 
     67       1.4      jtc 
     68       1.8  mycroft #ifdef __GNUC__
     69       1.6  mycroft 
     70      1.10      jtc #if defined(KERNEL) && !defined(I386_CPU)
     71       1.4      jtc #define __byte_swap_long(x) \
     72       1.9      cgd ({ register unsigned long __x = (x); \
     73       1.4      jtc    asm ("bswap %1" \
     74       1.9      cgd 	: "=r" (__x) \
     75       1.9      cgd 	: "0" (__x)); \
     76       1.9      cgd    __x; })
     77       1.4      jtc #else
     78       1.2      cgd #define __byte_swap_long(x) \
     79  1.10.2.1      cgd ({ register unsigned long __x = (x); \
     80       1.2      cgd    asm ("rorw $8, %w1\n\trorl $16, %1\n\trorw $8, %w1" \
     81       1.9      cgd 	: "=r" (__x) \
     82       1.9      cgd 	: "0" (__x)); \
     83       1.9      cgd    __x; })
     84       1.4      jtc #endif	/* KERNEL && ... */
     85  1.10.2.1      cgd 
     86       1.2      cgd #define __byte_swap_word(x) \
     87  1.10.2.1      cgd ({ register unsigned short __x = (x); \
     88       1.2      cgd    asm ("rorw $8, %w1" \
     89       1.9      cgd 	: "=r" (__x) \
     90       1.9      cgd 	: "0" (__x)); \
     91       1.9      cgd    __x; })
     92       1.6  mycroft 
     93       1.4      jtc #define	ntohl(x)	__byte_swap_long(x)
     94       1.4      jtc #define	ntohs(x)	__byte_swap_word(x)
     95       1.4      jtc #define	htonl(x)	__byte_swap_long(x)
     96       1.4      jtc #define	htons(x)	__byte_swap_word(x)
     97       1.6  mycroft 
     98       1.4      jtc #endif	/* __GNUC__ */
     99       1.1      cgd 
    100       1.4      jtc 
    101       1.1      cgd /*
    102       1.1      cgd  * Macros for network/external number representation conversion.
    103       1.1      cgd  */
    104  1.10.2.1      cgd #define	NTOHL(x)	(x) = ntohl((unsigned long)(x))
    105  1.10.2.1      cgd #define	NTOHS(x)	(x) = ntohs((unsigned short)(x))
    106  1.10.2.1      cgd #define	HTONL(x)	(x) = htonl((unsigned long)(x))
    107  1.10.2.1      cgd #define	HTONS(x)	(x) = htons((unsigned short)(x))
    108       1.6  mycroft 
    109       1.6  mycroft #endif /* _POSIX_SOURCE */
    110       1.6  mycroft 
    111       1.6  mycroft #endif /* _MACHINE_ENDIAN_H_ */
    112