File: [local] / prex-old / include / sys / endian.h (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:44 2008 UTC (16 years, 2 months ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, PREX_0_7_BASE, HEAD Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*-
* Copyright (c) 1987, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)endian.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _SYS_ENDIAN_H_
#define _SYS_ENDIAN_H_
/*
* Define the order of 32-bit words in 64-bit words.
*/
#define _QUAD_HIGHWORD 0
#define _QUAD_LOWWORD 1
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#define LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#define BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
#include <conf/config.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#ifdef CONFIG_BIG_ENDIAN
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif
__BEGIN_DECLS
uint32_t htonl(uint32_t);
uint16_t htons(uint16_t);
uint32_t ntohl(uint32_t);
uint16_t ntohs(uint16_t);
__END_DECLS
/*
* Macros for network/external number representation conversion.
*/
#if BYTE_ORDER == BIG_ENDIAN && !defined(lint)
#define ntohl(x) (x)
#define ntohs(x) (x)
#define htonl(x) (x)
#define htons(x) (x)
#define NTOHL(x) (x)
#define NTOHS(x) (x)
#define HTONL(x) (x)
#define HTONS(x) (x)
#else
#define NTOHL(x) (x) = ntohl((uint32_t)(x))
#define NTOHS(x) (x) = ntohs((uint16_t)(x))
#define HTONL(x) (x) = htonl((uint32_t)(x))
#define HTONS(x) (x) = htons((uint16_t)(x))
#endif
#endif /* !_SYS_ENDIAN_H_ */