Annotation of prex/include/sys/endian.h, Revision 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_ */
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