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/* $NetBSD: stddef.h,v 1.15.26.1 2011/05/20 19:18:37 bouyer Exp $ */

/*-
* Copyright (c) 1990, 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.
*
* @(#)stddef.h 8.1 (Berkeley) 6/2/93
*/

#ifndef _STDDEF_H_
#define _STDDEF_H_

#include <sys/cdefs.h>
#include <sys/featuretest.h>
#include <machine/ansi.h>

typedef _BSD_PTRDIFF_T_ ptrdiff_t;

#ifdef _BSD_SIZE_T_
typedef _BSD_SIZE_T_ size_t;
#undef _BSD_SIZE_T_
#endif

#if defined(_BSD_WCHAR_T_) && !defined(__cplusplus)
typedef _BSD_WCHAR_T_ wchar_t;
#undef _BSD_WCHAR_T_
#endif

#include <sys/null.h>

#if __GNUC_PREREQ__(4, 0)
#define offsetof(type, member) __builtin_offsetof(type, member)
#elif !defined(__cplusplus)
#define offsetof(type, member) ((size_t)(unsigned long)(&((type *)0)->member))
#else
#if !__GNUC_PREREQ__(3, 4)
#define __offsetof__(a) a
#endif
#define offsetof(type, member) __offsetof__((reinterpret_cast<size_t> \
(&reinterpret_cast<const volatile char &>(static_cast<type *>(0)->member))))
#endif
#endif /* _STDDEF_H_ */
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