1 /* Copyright (C) 1989, 1997, 1998, 1999, 2000, 2002, 2004, 2009, 2011
2 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GCC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
26 * ISO C Standard: 7.17 Common definitions <stddef.h>
28 #if (!defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
29 && !defined(__STDDEF_H__)) \
30 || defined(__need_wchar_t) || defined(__need_size_t) \
31 || defined(__need_ptrdiff_t) || defined(__need_NULL) \
32 || defined(__need_wint_t)
34 /* Any one of these symbols __need_* means that GNU libc
35 wants us just to define one data type. So don't define
36 the symbols that indicate this file's entire job has been done. */
37 #if (!defined(__need_wchar_t) && !defined(__need_size_t) \
38 && !defined(__need_ptrdiff_t) && !defined(__need_NULL) \
39 && !defined(__need_wint_t))
42 /* snaroff@next.com says the NeXT needs this. */
43 #define _ANSI_STDDEF_H
44 /* Irix 5.1 needs this. */
48 #ifndef __sys_stdtypes_h
49 /* This avoids lossage on SunOS but only if stdtypes.h comes first.
50 There's no way to win with the other order! Sun lossage. */
52 /* On 4.3bsd-net2, make sure ansi.h is included, so we have
53 one less case to deal with in the following. */
54 #if defined (__BSD_NET2__) || defined (____386BSD____) || (defined (__FreeBSD__) && (__FreeBSD__ < 5)) || defined(__NetBSD__)
55 #include <machine/ansi.h>
56 #if !defined(_MACHINE_ANSI_H_)
57 #if defined(_I386_ANSI_H_) || defined(_X86_64_ANSI_H_)
58 #define _MACHINE_ANSI_H_
62 /* On FreeBSD 5, machine/ansi.h does not exist anymore... */
63 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
64 #include <sys/_types.h>
67 #if defined(__DragonFly__)
68 #include <sys/types.h>
71 /* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
72 defined if the corresponding type is *not* defined.
73 FreeBSD-2.1 defines _MACHINE_ANSI_H_ instead of _ANSI_H_.
74 NetBSD defines _I386_ANSI_H_ and _X86_64_ANSI_H_ instead of _ANSI_H_ */
75 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
76 #if !defined(_SIZE_T_) && !defined(_BSD_SIZE_T_)
79 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
82 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
83 instead of _WCHAR_T_. */
84 #if !defined(_WCHAR_T_) && !defined(_BSD_WCHAR_T_)
89 /* Undef _FOO_T_ if we are supposed to define foo_t. */
90 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
92 #undef _BSD_PTRDIFF_T_
94 #if defined (__need_size_t) || defined (_STDDEF_H_)
98 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
102 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_) */
104 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
106 #if defined (__sequent__) && defined (_PTRDIFF_T_)
110 /* On VxWorks, <type/vxTypesBase.h> may have defined macros like
111 _TYPE_size_t which will typedef size_t. fixincludes patched the
112 vxTypesBase.h so that this macro is only defined if _GCC_SIZE_T is
113 not defined, and so that defining this macro defines _GCC_SIZE_T.
114 If we find that the macros are still defined at this point, we must
115 invoke them so that the type is defined as expected. */
116 #if defined (_TYPE_ptrdiff_t) && (defined (__need_ptrdiff_t) || defined (_STDDEF_H_))
118 #undef _TYPE_ptrdiff_t
120 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
124 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
129 /* In case nobody has defined these types, but we aren't running under
130 GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE_TYPE__, and
131 __WCHAR_TYPE__ have reasonable values. This can happen if the
132 parts of GCC is compiled by an older compiler, that actually
133 include gstddef.h, such as collect2. */
135 /* Signed type of difference of two pointers. */
137 /* Define this type if we are doing the whole job,
138 or if we want this type in particular. */
139 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
140 #ifndef _PTRDIFF_T /* in case <sys/types.h> has defined it. */
145 #ifndef _BSD_PTRDIFF_T_
146 #ifndef ___int_ptrdiff_t_h
147 #ifndef _GCC_PTRDIFF_T
148 #ifndef _PTRDIFF_T_DECLARED /* DragonFly */
154 #define _BSD_PTRDIFF_T_
155 #define ___int_ptrdiff_t_h
156 #define _GCC_PTRDIFF_T
157 #define _PTRDIFF_T_DECLARED
158 #ifndef __PTRDIFF_TYPE__
159 #define __PTRDIFF_TYPE__ long int
161 typedef __PTRDIFF_TYPE__ ptrdiff_t;
162 #endif /* _PTRDIFF_T_DECLARED */
163 #endif /* _GCC_PTRDIFF_T */
164 #endif /* ___int_ptrdiff_t_h */
165 #endif /* _BSD_PTRDIFF_T_ */
166 #endif /* _PTRDIFF_T_ */
167 #endif /* __PTRDIFF_T */
168 #endif /* _T_PTRDIFF */
169 #endif /* _T_PTRDIFF_ */
170 #endif /* _PTRDIFF_T */
172 /* If this symbol has done its job, get rid of it. */
173 #undef __need_ptrdiff_t
175 #endif /* _STDDEF_H or __need_ptrdiff_t. */
177 /* Unsigned type of `sizeof' something. */
179 /* Define this type if we are doing the whole job,
180 or if we want this type in particular. */
181 #if defined (_STDDEF_H) || defined (__need_size_t)
182 #ifndef __size_t__ /* BeOS */
183 #ifndef __SIZE_T__ /* Cray Unicos/Mk */
184 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
185 #ifndef _SYS_SIZE_T_H
191 #ifndef _SIZE_T_DEFINED_
192 #ifndef _SIZE_T_DEFINED
193 #ifndef _BSD_SIZE_T_DEFINED_ /* Darwin */
194 #ifndef _SIZE_T_DECLARED /* FreeBSD 5 */
195 #ifndef ___int_size_t_h
199 #define __size_t__ /* BeOS */
200 #define __SIZE_T__ /* Cray Unicos/Mk */
202 #define _SYS_SIZE_T_H
208 #define _SIZE_T_DEFINED_
209 #define _SIZE_T_DEFINED
210 #define _BSD_SIZE_T_DEFINED_ /* Darwin */
211 #define _SIZE_T_DECLARED /* FreeBSD 5 */
212 #define ___int_size_t_h
215 #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \
216 || defined(__DragonFly__) \
217 || defined(__FreeBSD_kernel__)
218 /* __size_t is a typedef on FreeBSD 5, must not trash it. */
222 #ifndef __SIZE_TYPE__
223 #define __SIZE_TYPE__ long unsigned int
225 #if !(defined (__GNUG__) && defined (size_t))
226 typedef __SIZE_TYPE__ size_t;
228 typedef long ssize_t;
229 #endif /* __BEOS__ */
230 #endif /* !(defined (__GNUG__) && defined (size_t)) */
231 #endif /* __size_t */
233 #endif /* _GCC_SIZE_T */
234 #endif /* ___int_size_t_h */
235 #endif /* _SIZE_T_DECLARED */
236 #endif /* _BSD_SIZE_T_DEFINED_ */
237 #endif /* _SIZE_T_DEFINED */
238 #endif /* _SIZE_T_DEFINED_ */
239 #endif /* _BSD_SIZE_T_ */
240 #endif /* _SIZE_T_ */
241 #endif /* __SIZE_T */
243 #endif /* _T_SIZE_ */
244 #endif /* _SYS_SIZE_T_H */
246 #endif /* __SIZE_T__ */
247 #endif /* __size_t__ */
249 #endif /* _STDDEF_H or __need_size_t. */
252 /* Wide character type.
253 Locale-writers should change this as necessary to
254 be big enough to hold unique values not between 0 and 127,
255 and not (wchar_t) -1, for each defined multibyte character. */
257 /* Define this type if we are doing the whole job,
258 or if we want this type in particular. */
259 #if defined (_STDDEF_H) || defined (__need_wchar_t)
260 #ifndef __wchar_t__ /* BeOS */
261 #ifndef __WCHAR_T__ /* Cray Unicos/Mk */
267 #ifndef _BSD_WCHAR_T_
268 #ifndef _BSD_WCHAR_T_DEFINED_ /* Darwin */
269 #ifndef _BSD_RUNE_T_DEFINED_ /* Darwin */
270 #ifndef _WCHAR_T_DECLARED /* FreeBSD 5 */
271 #ifndef _WCHAR_T_DEFINED_
272 #ifndef _WCHAR_T_DEFINED
274 #ifndef ___int_wchar_t_h
275 #ifndef __INT_WCHAR_T_H
277 #define __wchar_t__ /* BeOS */
278 #define __WCHAR_T__ /* Cray Unicos/Mk */
284 #define _BSD_WCHAR_T_
285 #define _WCHAR_T_DEFINED_
286 #define _WCHAR_T_DEFINED
288 #define ___int_wchar_t_h
289 #define __INT_WCHAR_T_H
291 #define _WCHAR_T_DECLARED
293 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
294 instead of _WCHAR_T_, and _BSD_RUNE_T_ (which, unlike the other
295 symbols in the _FOO_T_ family, stays defined even after its
296 corresponding type is defined). If we define wchar_t, then we
297 must undef _WCHAR_T_; for BSD/386 1.1 (and perhaps others), if
298 we undef _WCHAR_T_, then we must also define rune_t, since
299 headers like runetype.h assume that if machine/ansi.h is included,
300 and _BSD_WCHAR_T_ is not defined, then rune_t is available.
301 machine/ansi.h says, "Note that _WCHAR_T_ and _RUNE_T_ must be of
306 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
307 typedef _BSD_RUNE_T_ rune_t;
308 #define _BSD_WCHAR_T_DEFINED_
309 #define _BSD_RUNE_T_DEFINED_ /* Darwin */
310 #if defined (__FreeBSD__) && (__FreeBSD__ < 5)
311 /* Why is this file so hard to maintain properly? In contrast to
312 the comment above regarding BSD/386 1.1, on FreeBSD for as long
313 as the symbol has existed, _BSD_RUNE_T_ must not stay defined or
314 redundant typedefs will occur when stdlib.h is included after this file. */
320 /* FreeBSD 5 can't be handled well using "traditional" logic above
321 since it no longer defines _BSD_RUNE_T_ yet still desires to export
322 rune_t in some cases... */
323 #if defined (__DragonFly__) || (defined (__FreeBSD__) && (__FreeBSD__ >= 5))
324 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
326 #ifndef _RUNE_T_DECLARED
327 typedef __rune_t rune_t;
328 #define _RUNE_T_DECLARED
334 #ifndef __WCHAR_TYPE__
335 #define __WCHAR_TYPE__ int
338 typedef __WCHAR_TYPE__ wchar_t;
346 #endif /* _WCHAR_T_DECLARED */
347 #endif /* _BSD_RUNE_T_DEFINED_ */
355 #endif /* __WCHAR_T__ */
356 #endif /* __wchar_t__ */
357 #undef __need_wchar_t
358 #endif /* _STDDEF_H or __need_wchar_t. */
360 #if defined (__need_wint_t)
364 #ifndef __WINT_TYPE__
365 #define __WINT_TYPE__ unsigned int
367 typedef __WINT_TYPE__ wint_t;
372 /* In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
373 are already defined. */
374 /* BSD/OS 3.1 and FreeBSD [23].x require the MACHINE_ANSI_H check here. */
375 /* NetBSD 5 requires the I386_ANSI_H and X86_64_ANSI_H checks here. */
376 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_)
377 /* The references to _GCC_PTRDIFF_T_, _GCC_SIZE_T_, and _GCC_WCHAR_T_
378 are probably typos and should be removed before 2.8 is released. */
379 #ifdef _GCC_PTRDIFF_T_
381 #undef _BSD_PTRDIFF_T_
391 /* The following ones are the real ones. */
392 #ifdef _GCC_PTRDIFF_T
394 #undef _BSD_PTRDIFF_T_
404 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ || _X86_64_ANSI_H_ || _I386_ANSI_H_ */
406 #endif /* __sys_stdtypes_h */
408 /* A null pointer constant. */
410 #if defined (_STDDEF_H) || defined (__need_NULL)
411 #undef NULL /* in case <stdio.h> has defined it. */
416 #define NULL ((void *)0)
421 #endif /* NULL not defined and <stddef.h> or need NULL. */
426 /* Offset of member MEMBER in a struct of type TYPE. */
427 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
429 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
430 || (defined(__cplusplus) && __cplusplus >= 201103L)
431 #ifndef _GCC_MAX_ALIGN_T
432 #define _GCC_MAX_ALIGN_T
433 /* Type whose alignment is supported in every context and is at least
434 as great as that of any standard type not using alignment
437 long long __max_align_ll __attribute__((__aligned__(__alignof__(long long))));
438 long double __max_align_ld __attribute__((__aligned__(__alignof__(long double))));
441 #endif /* C11 or C++11. */
443 #endif /* _STDDEF_H was defined this time */
445 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
446 || __need_XXX was not defined before */