stddef.h revision 239462 
1193326Sed/*===---- stddef.h - Basic type definitions --------------------------------===
2193326Sed *
3193326Sed * Copyright (c) 2008 Eli Friedman
4193326Sed *
5193326Sed * Permission is hereby granted, free of charge, to any person obtaining a copy
6193326Sed * of this software and associated documentation files (the "Software"), to deal
7193326Sed * in the Software without restriction, including without limitation the rights
8193326Sed * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9193326Sed * copies of the Software, and to permit persons to whom the Software is
10193326Sed * furnished to do so, subject to the following conditions:
11193326Sed *
12193326Sed * The above copyright notice and this permission notice shall be included in
13193326Sed * all copies or substantial portions of the Software.
14193326Sed *
15193326Sed * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16193326Sed * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17193326Sed * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18193326Sed * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19193326Sed * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20193326Sed * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21193326Sed * THE SOFTWARE.
22193326Sed *
23193326Sed *===-----------------------------------------------------------------------===
24193326Sed */
25193326Sed
26193326Sed#ifndef __STDDEF_H
27193326Sed#define __STDDEF_H
28193326Sed
29221345Sdim#ifndef _PTRDIFF_T
30221345Sdim#define _PTRDIFF_T
31193326Sedtypedef __typeof__(((int*)0)-((int*)0)) ptrdiff_t;
32221345Sdim#endif
33204962Srdivacky#ifndef _SIZE_T
34204962Srdivacky#define _SIZE_T
35193326Sedtypedef __typeof__(sizeof(int)) size_t;
36204962Srdivacky#endif
37193326Sed#ifndef __cplusplus
38204962Srdivacky#ifndef _WCHAR_T
39204962Srdivacky#define _WCHAR_T
40212904Sdimtypedef __WCHAR_TYPE__ wchar_t;
41193326Sed#endif
42204962Srdivacky#endif
43193326Sed
44204962Srdivacky#undef NULL
45193326Sed#ifdef __cplusplus
46239462Sdim#  if !defined(__MINGW32__) && !defined(_MSC_VER)
47239462Sdim#    define NULL __null
48239462Sdim#  else
49239462Sdim#    define NULL 0
50239462Sdim#  endif
51193326Sed#else
52239462Sdim#  define NULL ((void*)0)
53193326Sed#endif
54193326Sed
55239462Sdim#ifdef __cplusplus
56239462Sdim#if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED)
57239462Sdimnamespace std { typedef decltype(nullptr) nullptr_t; }
58239462Sdimusing ::std::nullptr_t;
59239462Sdim#endif
60239462Sdim#endif
61239462Sdim
62193326Sed#define offsetof(t, d) __builtin_offsetof(t, d)
63193326Sed
64193326Sed#endif /* __STDDEF_H */
65218893Sdim
66218893Sdim/* Some C libraries expect to see a wint_t here. Others (notably MinGW) will use
67221345Sdim__WINT_TYPE__ directly; accommodate both by requiring __need_wint_t */
68218893Sdim#if defined(__need_wint_t)
69218893Sdim#if !defined(_WINT_T)
70218893Sdim#define _WINT_T
71218893Sdimtypedef __WINT_TYPE__ wint_t;
72218893Sdim#endif /* _WINT_T */
73218893Sdim#undef __need_wint_t
74218893Sdim#endif /* __need_wint_t */
75