1/*	$NetBSD: stddef.h,v 1.24 2020/05/13 14:00:58 joerg Exp $	*/
 2
 3/*-
 4 * Copyright (c) 1990, 1993
 5 *	The Regents of the University of California.  All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)stddef.h	8.1 (Berkeley) 6/2/93
32 */
33
34#ifndef _STDDEF_H_
35#define _STDDEF_H_
36
37#include <sys/cdefs.h>
38#include <sys/featuretest.h>
39#include <machine/ansi.h>
40
41#ifdef	_BSD_PTRDIFF_T_
42typedef	_BSD_PTRDIFF_T_	ptrdiff_t;
43#undef	_BSD_PTRDIFF_T_
44#endif
45
46#ifdef	_BSD_SIZE_T_
47typedef	_BSD_SIZE_T_	size_t;
48#undef	_BSD_SIZE_T_
49#endif
50
51#if defined(_BSD_WCHAR_T_) && !defined(__cplusplus)
52typedef	_BSD_WCHAR_T_	wchar_t;
53#undef	_BSD_WCHAR_T_
54#endif
55
56#include <sys/null.h>
57
58#if __GNUC_PREREQ__(4, 0)
59#define	offsetof(type, member)	__builtin_offsetof(type, member)
60#elif !defined(__cplusplus)
61#define	offsetof(type, member)	((size_t)(unsigned long)(&((type *)0)->member))
62#else
63#if !__GNUC_PREREQ__(3, 4)
64#define __offsetof__(a) a
65#endif
66#define	offsetof(type, member) __offsetof__((reinterpret_cast<size_t> \
67    (&reinterpret_cast<const volatile char &>(static_cast<type *>(0)->member))))
68#endif
69
70#if (__STDC_VERSION__ - 0) >= 201112L || (__cplusplus - 0) >= 201103L
71typedef union {
72	void *_v;
73	long double _ld;
74	long long int _ll;
75} max_align_t;
76#endif
77
78#endif /* _STDDEF_H_ */