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Annotation of prex-old/include/sys/endian.h, Revision 1.1.1.1

1.1       nbrk        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 <conf/config.h>
                     50: #include <sys/cdefs.h>
                     51: #include <sys/types.h>
                     52:
                     53: #ifdef CONFIG_BIG_ENDIAN
                     54: #define        BYTE_ORDER      BIG_ENDIAN
                     55: #else
                     56: #define        BYTE_ORDER      LITTLE_ENDIAN
                     57: #endif
                     58:
                     59: __BEGIN_DECLS
                     60: uint32_t htonl(uint32_t);
                     61: uint16_t htons(uint16_t);
                     62: uint32_t ntohl(uint32_t);
                     63: uint16_t ntohs(uint16_t);
                     64: __END_DECLS
                     65:
                     66: /*
                     67:  * Macros for network/external number representation conversion.
                     68:  */
                     69: #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
                     70: #define        ntohl(x)        (x)
                     71: #define        ntohs(x)        (x)
                     72: #define        htonl(x)        (x)
                     73: #define        htons(x)        (x)
                     74:
                     75: #define        NTOHL(x)        (x)
                     76: #define        NTOHS(x)        (x)
                     77: #define        HTONL(x)        (x)
                     78: #define        HTONS(x)        (x)
                     79:
                     80: #else
                     81:
                     82: #define        NTOHL(x)        (x) = ntohl((uint32_t)(x))
                     83: #define        NTOHS(x)        (x) = ntohs((uint16_t)(x))
                     84: #define        HTONL(x)        (x) = htonl((uint32_t)(x))
                     85: #define        HTONS(x)        (x) = htons((uint16_t)(x))
                     86: #endif
                     87: #endif /* !_SYS_ENDIAN_H_ */