1 /* Copyright (C) 1989-2013 Free Software Foundation, Inc.
2
3 This file is part of GCC.
4
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)
8 any later version.
9
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.
14
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.
18
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/>. */
23
24 /*
25 * ISO C Standard: 7.17 Common definitions <stddef.h>
26 */
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)
32
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))
39 #define _STDDEF_H
40 #define _STDDEF_H_
41 /* snaroff@next.com says the NeXT needs this. */
42 #define _ANSI_STDDEF_H
43 #endif
44
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. */
48
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>
53 #endif
54 /* On FreeBSD 5, machine/ansi.h does not exist anymore... */
55 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
56 #include <sys/_types.h>
57 #endif
58
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_)
65 #define _SIZE_T
66 #endif
67 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
68 #define _PTRDIFF_T
69 #endif
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_)
73 #ifndef _BSD_WCHAR_T_
74 #define _WCHAR_T
75 #endif
76 #endif
77 /* Undef _FOO_T_ if we are supposed to define foo_t. */
78 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
79 #undef _PTRDIFF_T_
80 #undef _BSD_PTRDIFF_T_
81 #endif
82 #if defined (__need_size_t) || defined (_STDDEF_H_)
83 #undef _SIZE_T_
84 #undef _BSD_SIZE_T_
85 #endif
86 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
87 #undef _WCHAR_T_
88 #undef _BSD_WCHAR_T_
89 #endif
90 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_) */
91
92 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
93 Just ignore it. */
94 #if defined (__sequent__) && defined (_PTRDIFF_T_)
95 #undef _PTRDIFF_T_
96 #endif
97
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_))
105 _TYPE_ptrdiff_t;
106 #undef _TYPE_ptrdiff_t
107 #endif
108 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
109 _TYPE_size_t;
110 #undef _TYPE_size_t
111 #endif
112 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
113 _TYPE_wchar_t;
114 #undef _TYPE_wchar_t
115 #endif
116
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. */
122
123 /* Signed type of difference of two pointers. */
124
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. */
129 #ifndef _T_PTRDIFF_
130 #ifndef _T_PTRDIFF
131 #ifndef __PTRDIFF_T
132 #ifndef _PTRDIFF_T_
133 #ifndef _BSD_PTRDIFF_T_
134 #ifndef ___int_ptrdiff_t_h
135 #ifndef _GCC_PTRDIFF_T
136 #define _PTRDIFF_T
137 #define _T_PTRDIFF_
138 #define _T_PTRDIFF
139 #define __PTRDIFF_T
140 #define _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
146 #endif
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 */
156
157 /* If this symbol has done its job, get rid of it. */
158 #undef __need_ptrdiff_t
159
160 #endif /* _STDDEF_H or __need_ptrdiff_t. */
161
162 /* Unsigned type of `sizeof' something. */
163
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
171 #ifndef _T_SIZE_
172 #ifndef _T_SIZE
173 #ifndef __SIZE_T
174 #ifndef _SIZE_T_
175 #ifndef _BSD_SIZE_T_
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
181 #ifndef _GCC_SIZE_T
182 #ifndef _SIZET_
183 #ifndef __size_t
184 #define __size_t__ /* BeOS */
185 #define __SIZE_T__ /* Cray Unicos/Mk */
186 #define _SIZE_T
187 #define _SYS_SIZE_T_H
188 #define _T_SIZE_
189 #define _T_SIZE
190 #define __SIZE_T
191 #define _SIZE_T_
192 #define _BSD_SIZE_T_
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
198 #define _GCC_SIZE_T
199 #define _SIZET_
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. */
205 #else
206 #define __size_t
207 #endif
208 #ifndef __SIZE_TYPE__
209 #define __SIZE_TYPE__ long unsigned int
210 #endif
211 #if !(defined (__GNUG__) && defined (size_t))
212 typedef __SIZE_TYPE__ size_t;
213 #ifdef __BEOS__
214 typedef long ssize_t;
215 #endif /* __BEOS__ */
216 #endif /* !(defined (__GNUG__) && defined (size_t)) */
217 #endif /* __size_t */
218 #endif /* _SIZET_ */
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 */
228 #endif /* _T_SIZE */
229 #endif /* _T_SIZE_ */
230 #endif /* _SYS_SIZE_T_H */
231 #endif /* _SIZE_T */
232 #endif /* __SIZE_T__ */
233 #endif /* __size_t__ */
234 #undef __need_size_t
235 #endif /* _STDDEF_H or __need_size_t. */
236
237
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. */
242
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 */
248 #ifndef _WCHAR_T
249 #ifndef _T_WCHAR_
250 #ifndef _T_WCHAR
251 #ifndef __WCHAR_T
252 #ifndef _WCHAR_T_
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
259 #ifndef _WCHAR_T_H
260 #ifndef ___int_wchar_t_h
261 #ifndef __INT_WCHAR_T_H
262 #ifndef _GCC_WCHAR_T
263 #define __wchar_t__ /* BeOS */
264 #define __WCHAR_T__ /* Cray Unicos/Mk */
265 #define _WCHAR_T
266 #define _T_WCHAR_
267 #define _T_WCHAR
268 #define __WCHAR_T
269 #define _WCHAR_T_
270 #define _BSD_WCHAR_T_
271 #define _WCHAR_T_DEFINED_
272 #define _WCHAR_T_DEFINED
273 #define _WCHAR_T_H
274 #define ___int_wchar_t_h
275 #define __INT_WCHAR_T_H
276 #define _GCC_WCHAR_T
277 #define _WCHAR_T_DECLARED
278
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
288 the same type." */
289 #ifdef _BSD_WCHAR_T_
290 #undef _BSD_WCHAR_T_
291 #ifdef _BSD_RUNE_T_
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. */
301 #undef _BSD_RUNE_T_
302 #endif
303 #endif
304 #endif
305 #endif
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)
311 #if __BSD_VISIBLE
312 #ifndef _RUNE_T_DECLARED
313 typedef __rune_t rune_t;
314 #define _RUNE_T_DECLARED
315 #endif
316 #endif
317 #endif
318 #endif
319
320 #ifndef __WCHAR_TYPE__
321 #define __WCHAR_TYPE__ int
322 #endif
323 #ifndef __cplusplus
324 typedef __WCHAR_TYPE__ wchar_t;
325 #endif
326 #endif
327 #endif
328 #endif
329 #endif
330 #endif
331 #endif
332 #endif /* _WCHAR_T_DECLARED */
333 #endif /* _BSD_RUNE_T_DEFINED_ */
334 #endif
335 #endif
336 #endif
337 #endif
338 #endif
339 #endif
340 #endif
341 #endif /* __WCHAR_T__ */
342 #endif /* __wchar_t__ */
343 #undef __need_wchar_t
344 #endif /* _STDDEF_H or __need_wchar_t. */
345
346 #if defined (__need_wint_t)
347 #ifndef _WINT_T
348 #define _WINT_T
349
350 #ifndef __WINT_TYPE__
351 #define __WINT_TYPE__ unsigned int
352 #endif
353 typedef __WINT_TYPE__ wint_t;
354 #endif
355 #undef __need_wint_t
356 #endif
357
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_
366 #undef _PTRDIFF_T_
367 #undef _BSD_PTRDIFF_T_
368 #endif
369 #ifdef _GCC_SIZE_T_
370 #undef _SIZE_T_
371 #undef _BSD_SIZE_T_
372 #endif
373 #ifdef _GCC_WCHAR_T_
374 #undef _WCHAR_T_
375 #undef _BSD_WCHAR_T_
376 #endif
377 /* The following ones are the real ones. */
378 #ifdef _GCC_PTRDIFF_T
379 #undef _PTRDIFF_T_
380 #undef _BSD_PTRDIFF_T_
381 #endif
382 #ifdef _GCC_SIZE_T
383 #undef _SIZE_T_
384 #undef _BSD_SIZE_T_
385 #endif
386 #ifdef _GCC_WCHAR_T
387 #undef _WCHAR_T_
388 #undef _BSD_WCHAR_T_
389 #endif
390 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ || _X86_64_ANSI_H_ || _I386_ANSI_H_ */
391
392 #endif /* __sys_stdtypes_h */
393
394 /* A null pointer constant. */
395
396 #if defined (_STDDEF_H) || defined (__need_NULL)
397 #undef NULL /* in case <stdio.h> has defined it. */
398 #ifdef __GNUG__
399 #define NULL __null
400 #else /* G++ */
401 #ifndef __cplusplus
402 #define NULL ((void *)0)
403 #else /* C++ */
404 #define NULL 0
405 #endif /* C++ */
406 #endif /* G++ */
407 #endif /* NULL not defined and <stddef.h> or need NULL. */
408 #undef __need_NULL
409
410 #ifdef _STDDEF_H
411
412 /* Offset of member MEMBER in a struct of type TYPE. */
413 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
414
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
421 specifiers. */
422 typedef struct {
423 long long __max_align_ll __attribute__((__aligned__(__alignof__(long long))));
424 long double __max_align_ld __attribute__((__aligned__(__alignof__(long double))));
425 } max_align_t;
426 #endif
427 #endif /* C11 or C++11. */
428
429 #if defined(__cplusplus) && __cplusplus >= 201103L
430 #ifndef _GXX_NULLPTR_T
431 #define _GXX_NULLPTR_T
432 typedef decltype(nullptr) nullptr_t;
433 #endif
434 #endif /* C++11. */
435
436 #endif /* _STDDEF_H was defined this time */
437
438 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
439 || __need_XXX was not defined before */
440