1 /* Copyright (C) 1989-2015 Free Software Foundation, Inc.
3 This file is part of GCC.
5 GCC is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3, or (at your option)
10 GCC is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 Under Section 7 of GPL version 3, you are granted additional
16 permissions described in the GCC Runtime Library Exception, version
17 3.1, as published by the Free Software Foundation.
19 You should have received a copy of the GNU General Public License and
20 a copy of the GCC Runtime Library Exception along with this program;
21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22 <http://www.gnu.org/licenses/>. */
25 * ISO C Standard: 7.17 Common definitions <stddef.h>
27 #if (!defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
28 && !defined(__STDDEF_H__)) \
29 || defined(__need_wchar_t) || defined(__need_size_t) \
30 || defined(__need_ptrdiff_t) || defined(__need_NULL) \
31 || defined(__need_wint_t)
33 /* Any one of these symbols __need_* means that GNU libc
34 wants us just to define one data type. So don't define
35 the symbols that indicate this file's entire job has been done. */
36 #if (!defined(__need_wchar_t) && !defined(__need_size_t) \
37 && !defined(__need_ptrdiff_t) && !defined(__need_NULL) \
38 && !defined(__need_wint_t))
41 /* snaroff@next.com says the NeXT needs this. */
42 #define _ANSI_STDDEF_H
45 #ifndef __sys_stdtypes_h
46 /* This avoids lossage on SunOS but only if stdtypes.h comes first.
47 There's no way to win with the other order! Sun lossage. */
49 /* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
50 defined if the corresponding type is *not* defined.
51 FreeBSD-2.1 defines _MACHINE_ANSI_H_ instead of _ANSI_H_.
52 NetBSD defines _I386_ANSI_H_ and _X86_64_ANSI_H_ instead of _ANSI_H_ */
53 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
54 #if !defined(_SIZE_T_) && !defined(_BSD_SIZE_T_)
57 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
60 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
61 instead of _WCHAR_T_. */
62 #if !defined(_WCHAR_T_) && !defined(_BSD_WCHAR_T_)
67 /* Undef _FOO_T_ if we are supposed to define foo_t. */
68 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
70 #undef _BSD_PTRDIFF_T_
72 #if defined (__need_size_t) || defined (_STDDEF_H_)
76 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
80 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_) */
82 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
84 #if defined (__sequent__) && defined (_PTRDIFF_T_)
88 /* On VxWorks, <type/vxTypesBase.h> may have defined macros like
89 _TYPE_size_t which will typedef size_t. fixincludes patched the
90 vxTypesBase.h so that this macro is only defined if _GCC_SIZE_T is
91 not defined, and so that defining this macro defines _GCC_SIZE_T.
92 If we find that the macros are still defined at this point, we must
93 invoke them so that the type is defined as expected. */
94 #if defined (_TYPE_ptrdiff_t) && (defined (__need_ptrdiff_t) || defined (_STDDEF_H_))
96 #undef _TYPE_ptrdiff_t
98 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
102 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
107 /* In case nobody has defined these types, but we aren't running under
108 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE_TYPE__, and
109 __WCHAR_TYPE__ have reasonable values. This can happen if the
110 parts of GCC is compiled by an older compiler, that actually
111 include gstddef.h, such as collect2. */
113 /* Signed type of difference of two pointers. */
115 /* Define this type if we are doing the whole job,
116 or if we want this type in particular. */
117 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
118 #ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */
123 #ifndef _BSD_PTRDIFF_T_
124 #ifndef ___int_ptrdiff_t_h
125 #ifndef _GCC_PTRDIFF_T
126 #ifndef _PTRDIFF_T_DECLARED /* DragonFly */
132 #define _BSD_PTRDIFF_T_
133 #define ___int_ptrdiff_t_h
134 #define _GCC_PTRDIFF_T
135 #define _PTRDIFF_T_DECLARED
136 #ifndef __PTRDIFF_TYPE__
137 #define __PTRDIFF_TYPE__ long int
139 typedef __PTRDIFF_TYPE__ ptrdiff_t;
140 #endif /* _PTRDIFF_T_DECLARED */
141 #endif /* _GCC_PTRDIFF_T */
142 #endif /* ___int_ptrdiff_t_h */
143 #endif /* _BSD_PTRDIFF_T_ */
144 #endif /* _PTRDIFF_T_ */
145 #endif /* __PTRDIFF_T */
146 #endif /* _T_PTRDIFF */
147 #endif /* _T_PTRDIFF_ */
148 #endif /* _PTRDIFF_T */
150 /* If this symbol has done its job, get rid of it. */
151 #undef __need_ptrdiff_t
153 #endif /* _STDDEF_H or __need_ptrdiff_t. */
155 /* Unsigned type of `sizeof' something. */
157 /* Define this type if we are doing the whole job,
158 or if we want this type in particular. */
159 #if defined (_STDDEF_H) || defined (__need_size_t)
160 #ifndef __size_t__ /* BeOS */
161 #ifndef __SIZE_T__ /* Cray Unicos/Mk */
162 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
163 #ifndef _SYS_SIZE_T_H
169 #ifndef _SIZE_T_DEFINED_
170 #ifndef _SIZE_T_DEFINED
171 #ifndef _BSD_SIZE_T_DEFINED_ /* Darwin */
172 #ifndef _SIZE_T_DECLARED /* FreeBSD 5 */
173 #ifndef ___int_size_t_h
177 #define __size_t__ /* BeOS */
178 #define __SIZE_T__ /* Cray Unicos/Mk */
180 #define _SYS_SIZE_T_H
186 #define _SIZE_T_DEFINED_
187 #define _SIZE_T_DEFINED
188 #define _BSD_SIZE_T_DEFINED_ /* Darwin */
189 #define _SIZE_T_DECLARED /* FreeBSD 5 */
190 #define ___int_size_t_h
193 #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \
194 || defined(__DragonFly__) \
195 || defined(__FreeBSD_kernel__)
196 /* __size_t is a typedef on FreeBSD 5, must not trash it. */
197 #elif defined (__VMS__)
198 /* __size_t is also a typedef on VMS. */
202 #ifndef __SIZE_TYPE__
203 #define __SIZE_TYPE__ long unsigned int
205 #if !(defined (__GNUG__) && defined (size_t))
206 typedef __SIZE_TYPE__ size_t;
208 typedef long ssize_t;
209 #endif /* __BEOS__ */
210 #endif /* !(defined (__GNUG__) && defined (size_t)) */
211 #endif /* __size_t */
213 #endif /* _GCC_SIZE_T */
214 #endif /* ___int_size_t_h */
215 #endif /* _SIZE_T_DECLARED */
216 #endif /* _BSD_SIZE_T_DEFINED_ */
217 #endif /* _SIZE_T_DEFINED */
218 #endif /* _SIZE_T_DEFINED_ */
219 #endif /* _BSD_SIZE_T_ */
220 #endif /* _SIZE_T_ */
221 #endif /* __SIZE_T */
223 #endif /* _T_SIZE_ */
224 #endif /* _SYS_SIZE_T_H */
226 #endif /* __SIZE_T__ */
227 #endif /* __size_t__ */
229 #endif /* _STDDEF_H or __need_size_t. */
232 /* Wide character type.
233 Locale-writers should change this as necessary to
234 be big enough to hold unique values not between 0 and 127,
235 and not (wchar_t) -1, for each defined multibyte character. */
237 /* Define this type if we are doing the whole job,
238 or if we want this type in particular. */
239 #if defined (_STDDEF_H) || defined (__need_wchar_t)
240 #ifndef __wchar_t__ /* BeOS */
241 #ifndef __WCHAR_T__ /* Cray Unicos/Mk */
247 #ifndef _BSD_WCHAR_T_
248 #ifndef _BSD_WCHAR_T_DEFINED_ /* Darwin */
249 #ifndef _BSD_RUNE_T_DEFINED_ /* Darwin */
250 #ifndef _WCHAR_T_DECLARED /* FreeBSD 5 */
251 #ifndef _WCHAR_T_DEFINED_
252 #ifndef _WCHAR_T_DEFINED
254 #ifndef ___int_wchar_t_h
255 #ifndef __INT_WCHAR_T_H
257 #define __wchar_t__ /* BeOS */
258 #define __WCHAR_T__ /* Cray Unicos/Mk */
264 #define _BSD_WCHAR_T_
265 #define _WCHAR_T_DEFINED_
266 #define _WCHAR_T_DEFINED
268 #define ___int_wchar_t_h
269 #define __INT_WCHAR_T_H
271 #define _WCHAR_T_DECLARED
273 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
274 instead of _WCHAR_T_, and _BSD_RUNE_T_ (which, unlike the other
275 symbols in the _FOO_T_ family, stays defined even after its
276 corresponding type is defined). If we define wchar_t, then we
277 must undef _WCHAR_T_; for BSD/386 1.1 (and perhaps others), if
278 we undef _WCHAR_T_, then we must also define rune_t, since
279 headers like runetype.h assume that if machine/ansi.h is included,
280 and _BSD_WCHAR_T_ is not defined, then rune_t is available.
281 machine/ansi.h says, "Note that _WCHAR_T_ and _RUNE_T_ must be of
286 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
287 typedef _BSD_RUNE_T_ rune_t;
288 #define _BSD_WCHAR_T_DEFINED_
289 #define _BSD_RUNE_T_DEFINED_ /* Darwin */
294 #ifndef __WCHAR_TYPE__
295 #define __WCHAR_TYPE__ int
298 typedef __WCHAR_TYPE__ wchar_t;
306 #endif /* _WCHAR_T_DECLARED */
307 #endif /* _BSD_RUNE_T_DEFINED_ */
315 #endif /* __WCHAR_T__ */
316 #endif /* __wchar_t__ */
317 #undef __need_wchar_t
318 #endif /* _STDDEF_H or __need_wchar_t. */
320 #if defined (__need_wint_t)
324 #ifndef __WINT_TYPE__
325 #define __WINT_TYPE__ unsigned int
327 typedef __WINT_TYPE__ wint_t;
332 /* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
333 are already defined. */
334 /* BSD/OS 3.1 and FreeBSD [23].x require the MACHINE_ANSI_H check here. */
335 /* NetBSD 5 requires the I386_ANSI_H and X86_64_ANSI_H checks here. */
336 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
337 /* The references to _GCC_PTRDIFF_T_, _GCC_SIZE_T_, and _GCC_WCHAR_T_
338 are probably typos and should be removed before 2.8 is released. */
339 #ifdef _GCC_PTRDIFF_T_
341 #undef _BSD_PTRDIFF_T_
351 /* The following ones are the real ones. */
352 #ifdef _GCC_PTRDIFF_T
354 #undef _BSD_PTRDIFF_T_
364 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ || _X86_64_ANSI_H_ || _I386_ANSI_H_ */
366 #endif /* __sys_stdtypes_h */
368 /* A null pointer constant. */
370 #if defined (_STDDEF_H) || defined (__need_NULL)
371 #undef NULL /* in case <stdio.h> has defined it. */
376 #define NULL ((void *)0)
381 #endif /* NULL not defined and <stddef.h> or need NULL. */
386 /* Offset of member MEMBER in a struct of type TYPE. */
387 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
389 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
390 || (defined(__cplusplus) && __cplusplus >= 201103L)
391 #ifndef _GCC_MAX_ALIGN_T
392 #define _GCC_MAX_ALIGN_T
393 /* Type whose alignment is supported in every context and is at least
394 as great as that of any standard type not using alignment
397 long long __max_align_ll __attribute__((__aligned__(__alignof__(long long))));
398 long double __max_align_ld __attribute__((__aligned__(__alignof__(long double))));
401 #endif /* C11 or C++11. */
403 #if defined(__cplusplus) && __cplusplus >= 201103L
404 #ifndef _GXX_NULLPTR_T
405 #define _GXX_NULLPTR_T
406 typedef decltype(nullptr) nullptr_t;
410 #endif /* _STDDEF_H was defined this time */
412 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
413 || __need_XXX was not defined before */