1 /* Copyright (C) 1989-2013 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 /* On 4.3bsd-net2, make sure ansi.h is included, so we have
50 one less case to deal with in the following. */
51 #if defined (__BSD_NET2__) || defined (____386BSD____) || (defined (__FreeBSD__) && (__FreeBSD__ < 5)) || defined(__NetBSD__)
52 #include <machine/ansi.h>
54 /* On FreeBSD 5, machine/ansi.h does not exist anymore... */
55 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
56 #include <sys/_types.h>
59 /* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
60 defined if the corresponding type is *not* defined.
61 FreeBSD-2.1 defines _MACHINE_ANSI_H_ instead of _ANSI_H_.
62 NetBSD defines _I386_ANSI_H_ and _X86_64_ANSI_H_ instead of _ANSI_H_ */
63 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
64 #if !defined(_SIZE_T_) && !defined(_BSD_SIZE_T_)
67 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
70 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
71 instead of _WCHAR_T_. */
72 #if !defined(_WCHAR_T_) && !defined(_BSD_WCHAR_T_)
77 /* Undef _FOO_T_ if we are supposed to define foo_t. */
78 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
80 #undef _BSD_PTRDIFF_T_
82 #if defined (__need_size_t) || defined (_STDDEF_H_)
86 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
90 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_) */
92 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
94 #if defined (__sequent__) && defined (_PTRDIFF_T_)
98 /* On VxWorks, <type/vxTypesBase.h> may have defined macros like
99 _TYPE_size_t which will typedef size_t. fixincludes patched the
100 vxTypesBase.h so that this macro is only defined if _GCC_SIZE_T is
101 not defined, and so that defining this macro defines _GCC_SIZE_T.
102 If we find that the macros are still defined at this point, we must
103 invoke them so that the type is defined as expected. */
104 #if defined (_TYPE_ptrdiff_t) && (defined (__need_ptrdiff_t) || defined (_STDDEF_H_))
106 #undef _TYPE_ptrdiff_t
108 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
112 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
117 /* In case nobody has defined these types, but we aren't running under
118 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE_TYPE__, and
119 __WCHAR_TYPE__ have reasonable values. This can happen if the
120 parts of GCC is compiled by an older compiler, that actually
121 include gstddef.h, such as collect2. */
123 /* Signed type of difference of two pointers. */
125 /* Define this type if we are doing the whole job,
126 or if we want this type in particular. */
127 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
128 #ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */
133 #ifndef _BSD_PTRDIFF_T_
134 #ifndef ___int_ptrdiff_t_h
135 #ifndef _GCC_PTRDIFF_T
141 #define _BSD_PTRDIFF_T_
142 #define ___int_ptrdiff_t_h
143 #define _GCC_PTRDIFF_T
144 #ifndef __PTRDIFF_TYPE__
145 #define __PTRDIFF_TYPE__ long int
147 typedef __PTRDIFF_TYPE__
ptrdiff_t;
148 #endif /* _GCC_PTRDIFF_T */
149 #endif /* ___int_ptrdiff_t_h */
150 #endif /* _BSD_PTRDIFF_T_ */
151 #endif /* _PTRDIFF_T_ */
152 #endif /* __PTRDIFF_T */
153 #endif /* _T_PTRDIFF */
154 #endif /* _T_PTRDIFF_ */
155 #endif /* _PTRDIFF_T */
157 /* If this symbol has done its job, get rid of it. */
158 #undef __need_ptrdiff_t
160 #endif /* _STDDEF_H or __need_ptrdiff_t. */
162 /* Unsigned type of `sizeof' something. */
164 /* Define this type if we are doing the whole job,
165 or if we want this type in particular. */
166 #if defined (_STDDEF_H) || defined (__need_size_t)
167 #ifndef __size_t__ /* BeOS */
168 #ifndef __SIZE_T__ /* Cray Unicos/Mk */
169 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
170 #ifndef _SYS_SIZE_T_H
176 #ifndef _SIZE_T_DEFINED_
177 #ifndef _SIZE_T_DEFINED
178 #ifndef _BSD_SIZE_T_DEFINED_ /* Darwin */
179 #ifndef _SIZE_T_DECLARED /* FreeBSD 5 */
180 #ifndef ___int_size_t_h
184 #define __size_t__ /* BeOS */
185 #define __SIZE_T__ /* Cray Unicos/Mk */
187 #define _SYS_SIZE_T_H
193 #define _SIZE_T_DEFINED_
194 #define _SIZE_T_DEFINED
195 #define _BSD_SIZE_T_DEFINED_ /* Darwin */
196 #define _SIZE_T_DECLARED /* FreeBSD 5 */
197 #define ___int_size_t_h
200 #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \
201 || defined(__FreeBSD_kernel__)
202 /* __size_t is a typedef on FreeBSD 5, must not trash it. */
203 #elif defined (__VMS__)
204 /* __size_t is also a typedef on VMS. */
208 #ifndef __SIZE_TYPE__
209 #define __SIZE_TYPE__ long unsigned int
211 #if !(defined (__GNUG__) && defined (size_t))
212 typedef __SIZE_TYPE__
size_t;
214 typedef long ssize_t
;
215 #endif /* __BEOS__ */
216 #endif /* !(defined (__GNUG__) && defined (size_t)) */
217 #endif /* __size_t */
219 #endif /* _GCC_SIZE_T */
220 #endif /* ___int_size_t_h */
221 #endif /* _SIZE_T_DECLARED */
222 #endif /* _BSD_SIZE_T_DEFINED_ */
223 #endif /* _SIZE_T_DEFINED */
224 #endif /* _SIZE_T_DEFINED_ */
225 #endif /* _BSD_SIZE_T_ */
226 #endif /* _SIZE_T_ */
227 #endif /* __SIZE_T */
229 #endif /* _T_SIZE_ */
230 #endif /* _SYS_SIZE_T_H */
232 #endif /* __SIZE_T__ */
233 #endif /* __size_t__ */
235 #endif /* _STDDEF_H or __need_size_t. */
238 /* Wide character type.
239 Locale-writers should change this as necessary to
240 be big enough to hold unique values not between 0 and 127,
241 and not (wchar_t) -1, for each defined multibyte character. */
243 /* Define this type if we are doing the whole job,
244 or if we want this type in particular. */
245 #if defined (_STDDEF_H) || defined (__need_wchar_t)
246 #ifndef __wchar_t__ /* BeOS */
247 #ifndef __WCHAR_T__ /* Cray Unicos/Mk */
253 #ifndef _BSD_WCHAR_T_
254 #ifndef _BSD_WCHAR_T_DEFINED_ /* Darwin */
255 #ifndef _BSD_RUNE_T_DEFINED_ /* Darwin */
256 #ifndef _WCHAR_T_DECLARED /* FreeBSD 5 */
257 #ifndef _WCHAR_T_DEFINED_
258 #ifndef _WCHAR_T_DEFINED
260 #ifndef ___int_wchar_t_h
261 #ifndef __INT_WCHAR_T_H
263 #define __wchar_t__ /* BeOS */
264 #define __WCHAR_T__ /* Cray Unicos/Mk */
270 #define _BSD_WCHAR_T_
271 #define _WCHAR_T_DEFINED_
272 #define _WCHAR_T_DEFINED
274 #define ___int_wchar_t_h
275 #define __INT_WCHAR_T_H
277 #define _WCHAR_T_DECLARED
279 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
280 instead of _WCHAR_T_, and _BSD_RUNE_T_ (which, unlike the other
281 symbols in the _FOO_T_ family, stays defined even after its
282 corresponding type is defined). If we define wchar_t, then we
283 must undef _WCHAR_T_; for BSD/386 1.1 (and perhaps others), if
284 we undef _WCHAR_T_, then we must also define rune_t, since
285 headers like runetype.h assume that if machine/ansi.h is included,
286 and _BSD_WCHAR_T_ is not defined, then rune_t is available.
287 machine/ansi.h says, "Note that _WCHAR_T_ and _RUNE_T_ must be of
292 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
293 typedef _BSD_RUNE_T_ rune_t
;
294 #define _BSD_WCHAR_T_DEFINED_
295 #define _BSD_RUNE_T_DEFINED_ /* Darwin */
296 #if defined (__FreeBSD__) && (__FreeBSD__ < 5)
297 /* Why is this file so hard to maintain properly? In contrast to
298 the comment above regarding BSD/386 1.1, on FreeBSD for as long
299 as the symbol has existed, _BSD_RUNE_T_ must not stay defined or
300 redundant typedefs will occur when stdlib.h is included after this file. */
306 /* FreeBSD 5 can't be handled well using "traditional" logic above
307 since it no longer defines _BSD_RUNE_T_ yet still desires to export
308 rune_t in some cases... */
309 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
310 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
312 #ifndef _RUNE_T_DECLARED
313 typedef __rune_t rune_t
;
314 #define _RUNE_T_DECLARED
320 #ifndef __WCHAR_TYPE__
321 #define __WCHAR_TYPE__ int
324 typedef __WCHAR_TYPE__
wchar_t;
332 #endif /* _WCHAR_T_DECLARED */
333 #endif /* _BSD_RUNE_T_DEFINED_ */
341 #endif /* __WCHAR_T__ */
342 #endif /* __wchar_t__ */
343 #undef __need_wchar_t
344 #endif /* _STDDEF_H or __need_wchar_t. */
346 #if defined (__need_wint_t)
350 #ifndef __WINT_TYPE__
351 #define __WINT_TYPE__ unsigned int
353 typedef __WINT_TYPE__
wint_t;
358 /* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
359 are already defined. */
360 /* BSD/OS 3.1 and FreeBSD [23].x require the MACHINE_ANSI_H check here. */
361 /* NetBSD 5 requires the I386_ANSI_H and X86_64_ANSI_H checks here. */
362 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
363 /* The references to _GCC_PTRDIFF_T_, _GCC_SIZE_T_, and _GCC_WCHAR_T_
364 are probably typos and should be removed before 2.8 is released. */
365 #ifdef _GCC_PTRDIFF_T_
367 #undef _BSD_PTRDIFF_T_
377 /* The following ones are the real ones. */
378 #ifdef _GCC_PTRDIFF_T
380 #undef _BSD_PTRDIFF_T_
390 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ || _X86_64_ANSI_H_ || _I386_ANSI_H_ */
392 #endif /* __sys_stdtypes_h */
394 /* A null pointer constant. */
396 #if defined (_STDDEF_H) || defined (__need_NULL)
397 #undef NULL /* in case <stdio.h> has defined it. */
402 #define NULL ((void *)0)
407 #endif /* NULL not defined and <stddef.h> or need NULL. */
412 /* Offset of member MEMBER in a struct of type TYPE. */
413 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
415 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
416 || (defined(__cplusplus) && __cplusplus >= 201103L)
417 #ifndef _GCC_MAX_ALIGN_T
418 #define _GCC_MAX_ALIGN_T
419 /* Type whose alignment is supported in every context and is at least
420 as great as that of any standard type not using alignment
423 long long __max_align_ll
__attribute__((__aligned__(__alignof__(long long))));
424 long double __max_align_ld
__attribute__((__aligned__(__alignof__(long double))));
427 #endif /* C11 or C++11. */
429 #if defined(__cplusplus) && __cplusplus >= 201103L
430 #ifndef _GXX_NULLPTR_T
431 #define _GXX_NULLPTR_T
432 typedef decltype(nullptr) nullptr_t
;
436 #endif /* _STDDEF_H was defined this time */
438 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
439 || __need_XXX was not defined before */