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endian.h revision 1.1 
      1 /*
      2  * Copyright (c) 1992 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Ralph Campbell.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: @(#)endian.h	7.5 (Berkeley) 2/21/93
     37  * $Id: endian.h,v 1.1 1993/10/12 03:22:39 deraadt Exp $
     38  */
     39 
     40 /*
     41  * Define _NOQUAD if the compiler does NOT support 64-bit integers.
     42  */
     43 /* #define _NOQUAD */
     44 
     45 /*
     46  * Define the order of 32-bit words in 64-bit words.
     47  */
     48 #define _QUAD_HIGHWORD 1
     49 #define _QUAD_LOWWORD 0
     50 
     51 #ifndef _POSIX_SOURCE
     52 /*
     53  * Definitions for byte order, according to byte significance from low
     54  * address to high.
     55  */
     56 #define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
     57 #define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
     58 #define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */
     59 
     60 #define	BYTE_ORDER	LITTLE_ENDIAN
     61 
     62 #include <sys/cdefs.h>
     63 
     64 __BEGIN_DECLS
     65 unsigned long	htonl __P((unsigned long));
     66 unsigned short	htons __P((unsigned short));
     67 unsigned long	ntohl __P((unsigned long));
     68 unsigned short	ntohs __P((unsigned short));
     69 __END_DECLS
     70 
     71 /*
     72  * Macros for network/external number representation conversion.
     73  */
     74 #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
     75 #define	ntohl(x)	(x)
     76 #define	ntohs(x)	(x)
     77 #define	htonl(x)	(x)
     78 #define	htons(x)	(x)
     79 
     80 #define	NTOHL(x)	(x)
     81 #define	NTOHS(x)	(x)
     82 #define	HTONL(x)	(x)
     83 #define	HTONS(x)	(x)
     84 
     85 #else
     86 
     87 #define	NTOHL(x)	(x) = ntohl((u_long)x)
     88 #define	NTOHS(x)	(x) = ntohs((u_short)x)
     89 #define	HTONL(x)	(x) = htonl((u_long)x)
     90 #define	HTONS(x)	(x) = htons((u_short)x)
     91 #endif
     92 #endif /* !_POSIX_SOURCE */
     93