stddef.h revision 1.12 
1/*	$OpenBSD: stddef.h,v 1.12 2011/07/03 18:51:01 jsg Exp $	*/
2/*	$NetBSD: stddef.h,v 1.4 1994/10/26 00:56:26 cgd Exp $	*/
3
4/*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 *	@(#)stddef.h	5.5 (Berkeley) 4/3/91
33 */
34
35#ifndef _STDDEF_H_
36#define _STDDEF_H_
37
38#include <sys/cdefs.h>
39#include <sys/_types.h>
40
41#ifndef _PTRDIFF_T_DEFINED_
42#define _PTRDIFF_T_DEFINED_
43typedef	__ptrdiff_t	ptrdiff_t;
44#endif
45
46#ifndef	_SIZE_T_DEFINED_
47#define	_SIZE_T_DEFINED_
48typedef	__size_t	size_t;
49#endif
50
51/* in C++, wchar_t is a built-in type */
52#if !defined(_WCHAR_T_DEFINED_) && !defined(__cplusplus)
53#define _WCHAR_T_DEFINED_
54typedef	__wchar_t	wchar_t;
55#endif
56
57#ifndef	_WINT_T_DEFINED_
58#define	_WINT_T_DEFINED_
59typedef	__wint_t	wint_t;
60#endif
61
62#ifndef	_MBSTATE_T_DEFINED_
63#define	_MBSTATE_T_DEFINED_
64typedef	__mbstate_t	mbstate_t;
65#endif
66
67#ifndef	NULL
68#ifdef 	__GNUG__
69#define NULL	__null
70#elif defined(__cplusplus)
71#define	NULL	0L
72#else
73#define	NULL	((void *)0)
74#endif
75#endif
76
77#if __GNUC_PREREQ__(4, 0)
78#define	offsetof(type, member)	__builtin_offsetof(type, member)
79#else
80#define	offsetof(type, member)	((size_t)(&((type *)0)->member))
81#endif
82
83#endif /* _STDDEF_H_ */
84