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Annotation of Net2/arch/i386/include/endian.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1987, 1991 Regents of the University of California.
                      3:  * 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. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
                     33:  *     @(#)endian.h    7.8 (Berkeley) 4/3/91
                     34:  */
                     35: 
                     36: /*
                     37:  * Definitions for byte order, according to byte significance from low
                     38:  * address to high.
                     39:  */
                     40: #define        LITTLE_ENDIAN   1234    /* LSB first: i386, vax */
                     41: #define        BIG_ENDIAN      4321    /* MSB first: 68000, ibm, net */
                     42: #define        PDP_ENDIAN      3412    /* LSB first in word, MSW first in long */
                     43: 
                     44: #define        BYTE_ORDER      LITTLE_ENDIAN
                     45: 
                     46: #ifndef KERNEL
                     47: #include <sys/cdefs.h>
                     48: #endif
                     49: 
                     50: __BEGIN_DECLS
                     51: unsigned long  htonl __P((unsigned long));
                     52: unsigned short htons __P((unsigned short));
                     53: unsigned long  ntohl __P((unsigned long));
                     54: unsigned short ntohs __P((unsigned short));
                     55: __END_DECLS
                     56: 
                     57: /*
                     58:  * Macros for network/external number representation conversion.
                     59:  */
                     60: #if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
                     61: #define        ntohl(x)        (x)
                     62: #define        ntohs(x)        (x)
                     63: #define        htonl(x)        (x)
                     64: #define        htons(x)        (x)
                     65: 
                     66: #define        NTOHL(x)        (x)
                     67: #define        NTOHS(x)        (x)
                     68: #define        HTONL(x)        (x)
                     69: #define        HTONS(x)        (x)
                     70: 
                     71: #else
                     72: 
                     73: #define        NTOHL(x)        (x) = ntohl((u_long)x)
                     74: #define        NTOHS(x)        (x) = ntohs((u_short)x)
                     75: #define        HTONL(x)        (x) = htonl((u_long)x)
                     76: #define        HTONS(x)        (x) = htons((u_short)x)
                     77: #endif

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