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/* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */
/* Written 2000 by Werner Almesberger */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Berkeley Software Design, Inc.
*
* 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.
* 4. 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.
*
* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
* $FreeBSD$
*/
#ifndef _SYS_DEFS_H_
#define _SYS_DEFS_H_
#include "types.h"
#include "compiler.h"
#ifndef __DEQUALIFY
#define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
#endif
#ifndef offsetof
#define offsetof(type, field) \
((size_t)(uintptr_t)((const volatile void *)&((type *)0)->field))
#endif
#ifndef __offsetof
#define __offsetof(type, field) offsetof(type, field)
#endif
#ifndef __containerof
#define __containerof(ptr, type, field) \
__DEQUALIFY(type *, (const volatile char *)(ptr) - offsetof(type, field))
#endif
#ifndef container_of
#define container_of(ptr, type, field) __containerof(ptr, type, field)
#endif
/*
* Definitions for byte order, according to byte significance from low
* address to high.
*/
#ifndef _LITTLE_ENDIAN
#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
#endif
#ifndef _BIG_ENDIAN
#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
#endif
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN _LITTLE_ENDIAN
#endif
#ifndef BIG_ENDIAN
#define BIG_ENDIAN _BIG_ENDIAN
#endif
#ifndef _BYTE_ORDER
#define _BYTE_ORDER _LITTLE_ENDIAN
#endif
#ifndef BYTE_ORDER
#define BYTE_ORDER _BYTE_ORDER
#endif
#endif /* _SYS_DEFS_H_ */
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