1 /* $NetBSD: stddef.h,v 1.17 2013/12/12 17:53:03 matt 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_ 42 typedef _BSD_PTRDIFF_T_ ptrdiff_t; 43 #undef _BSD_PTRDIFF_T_ 44 #endif 45 46 #ifdef _BSD_SIZE_T_ 47 typedef _BSD_SIZE_T_ size_t; 48 #undef _BSD_SIZE_T_ 49 #endif 50 51 #if defined(_BSD_WCHAR_T_) && !defined(__cplusplus) 52 typedef _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 #endif /* _STDDEF_H_ */ 71