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   1 /*-
   2  * Copyright (c) 1987, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)endian.h    8.1 (Berkeley) 6/10/93
  30  */
  31 
  32 #ifndef _SYS_ENDIAN_H_
  33 #define _SYS_ENDIAN_H_
  34 
  35 /*
  36  * Define the order of 32-bit words in 64-bit words.
  37  */
  38 #define _QUAD_HIGHWORD 0
  39 #define _QUAD_LOWWORD 1
  40 
  41 /*
  42  * Definitions for byte order, according to byte significance from low
  43  * address to high.
  44  */
  45 #define LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
  46 #define BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net */
  47 #define PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
  48 
  49 #include <machine/endian.h>
  50 #include <sys/cdefs.h>
  51 #include <sys/types.h>
  52 
  53 #define BYTE_ORDER      _BYTE_ORDER
  54 
  55 
  56 /*
  57  * Macros for network/external number representation conversion.
  58  */
  59 #if BYTE_ORDER == BIG_ENDIAN && !defined(__lint__)
  60 #define ntohl(x)        (x)
  61 #define ntohs(x)        (x)
  62 #define htonl(x)        (x)
  63 #define htons(x)        (x)
  64 
  65 #else   /* LITTLE_ENDIAN || !defined(__lint__) */
  66 
  67 __BEGIN_DECLS
  68 uint32_t htonl(uint32_t);
  69 uint16_t htons(uint16_t);
  70 uint32_t ntohl(uint32_t);
  71 uint16_t ntohs(uint16_t);
  72 __END_DECLS
  73 
  74 #endif  /* LITTLE_ENDIAN || !defined(__lint__) */
  75 
  76 #endif /* !_SYS_ENDIAN_H_ */
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