1 /* Copyright (C) 1989, 1997, 1998, 1999, 2000, 2002, 2004, 2009, 2011
2    Free Software Foundation, Inc.
3 
4 This file is part of GCC.
5 
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)
9 any later version.
10 
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.
15 
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.
19 
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/>.  */
24 
25 /*
26  * ISO C Standard:  7.17  Common definitions  <stddef.h>
27  */
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)
33 
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))
40 #define _STDDEF_H
41 #define _STDDEF_H_
42 /* snaroff@next.com says the NeXT needs this.  */
43 #define _ANSI_STDDEF_H
44 /* Irix 5.1 needs this.  */
45 #define __STDDEF_H__
46 #endif
47 
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.  */
51 
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_
59 #endif
60 #endif
61 #endif
62 /* On FreeBSD 5, machine/ansi.h does not exist anymore... */
63 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
64 #include <sys/_types.h>
65 #endif
66 
67 #if defined(__DragonFly__)
68 #include <sys/types.h>
69 #endif
70 
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_)
77 #define _SIZE_T
78 #endif
79 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
80 #define _PTRDIFF_T
81 #endif
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_)
85 #ifndef _BSD_WCHAR_T_
86 #define _WCHAR_T
87 #endif
88 #endif
89 /* Undef _FOO_T_ if we are supposed to define foo_t.  */
90 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
91 #undef _PTRDIFF_T_
92 #undef _BSD_PTRDIFF_T_
93 #endif
94 #if defined (__need_size_t) || defined (_STDDEF_H_)
95 #undef _SIZE_T_
96 #undef _BSD_SIZE_T_
97 #endif
98 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
99 #undef _WCHAR_T_
100 #undef _BSD_WCHAR_T_
101 #endif
102 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) || defined(_X86_64_ANSI_H_) || defined(_I386_ANSI_H_) */
103 
104 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
105    Just ignore it.  */
106 #if defined (__sequent__) && defined (_PTRDIFF_T_)
107 #undef _PTRDIFF_T_
108 #endif
109 
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_))
117 _TYPE_ptrdiff_t;
118 #undef _TYPE_ptrdiff_t
119 #endif
120 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
121 _TYPE_size_t;
122 #undef _TYPE_size_t
123 #endif
124 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
125 _TYPE_wchar_t;
126 #undef _TYPE_wchar_t
127 #endif
128 
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.  */
134 
135 /* Signed type of difference of two pointers.  */
136 
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. */
141 #ifndef _T_PTRDIFF_
142 #ifndef _T_PTRDIFF
143 #ifndef __PTRDIFF_T
144 #ifndef _PTRDIFF_T_
145 #ifndef _BSD_PTRDIFF_T_
146 #ifndef ___int_ptrdiff_t_h
147 #ifndef _GCC_PTRDIFF_T
148 #ifndef _PTRDIFF_T_DECLARED /* DragonFly */
149 #define _PTRDIFF_T
150 #define _T_PTRDIFF_
151 #define _T_PTRDIFF
152 #define __PTRDIFF_T
153 #define _PTRDIFF_T_
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
160 #endif
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 */
171 
172 /* If this symbol has done its job, get rid of it.  */
173 #undef	__need_ptrdiff_t
174 
175 #endif /* _STDDEF_H or __need_ptrdiff_t.  */
176 
177 /* Unsigned type of `sizeof' something.  */
178 
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
186 #ifndef _T_SIZE_
187 #ifndef _T_SIZE
188 #ifndef __SIZE_T
189 #ifndef _SIZE_T_
190 #ifndef _BSD_SIZE_T_
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
196 #ifndef _GCC_SIZE_T
197 #ifndef _SIZET_
198 #ifndef __size_t
199 #define __size_t__	/* BeOS */
200 #define __SIZE_T__	/* Cray Unicos/Mk */
201 #define _SIZE_T
202 #define _SYS_SIZE_T_H
203 #define _T_SIZE_
204 #define _T_SIZE
205 #define __SIZE_T
206 #define _SIZE_T_
207 #define _BSD_SIZE_T_
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
213 #define _GCC_SIZE_T
214 #define _SIZET_
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. */
219 #else
220 #define __size_t
221 #endif
222 #ifndef __SIZE_TYPE__
223 #define __SIZE_TYPE__ long unsigned int
224 #endif
225 #if !(defined (__GNUG__) && defined (size_t))
226 typedef __SIZE_TYPE__ size_t;
227 #ifdef __BEOS__
228 typedef long ssize_t;
229 #endif /* __BEOS__ */
230 #endif /* !(defined (__GNUG__) && defined (size_t)) */
231 #endif /* __size_t */
232 #endif /* _SIZET_ */
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 */
242 #endif /* _T_SIZE */
243 #endif /* _T_SIZE_ */
244 #endif /* _SYS_SIZE_T_H */
245 #endif /* _SIZE_T */
246 #endif /* __SIZE_T__ */
247 #endif /* __size_t__ */
248 #undef	__need_size_t
249 #endif /* _STDDEF_H or __need_size_t.  */
250 
251 
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.  */
256 
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 */
262 #ifndef _WCHAR_T
263 #ifndef _T_WCHAR_
264 #ifndef _T_WCHAR
265 #ifndef __WCHAR_T
266 #ifndef _WCHAR_T_
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
273 #ifndef _WCHAR_T_H
274 #ifndef ___int_wchar_t_h
275 #ifndef __INT_WCHAR_T_H
276 #ifndef _GCC_WCHAR_T
277 #define __wchar_t__	/* BeOS */
278 #define __WCHAR_T__	/* Cray Unicos/Mk */
279 #define _WCHAR_T
280 #define _T_WCHAR_
281 #define _T_WCHAR
282 #define __WCHAR_T
283 #define _WCHAR_T_
284 #define _BSD_WCHAR_T_
285 #define _WCHAR_T_DEFINED_
286 #define _WCHAR_T_DEFINED
287 #define _WCHAR_T_H
288 #define ___int_wchar_t_h
289 #define __INT_WCHAR_T_H
290 #define _GCC_WCHAR_T
291 #define _WCHAR_T_DECLARED
292 
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
302    the same type." */
303 #ifdef _BSD_WCHAR_T_
304 #undef _BSD_WCHAR_T_
305 #ifdef _BSD_RUNE_T_
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. */
315 #undef _BSD_RUNE_T_
316 #endif
317 #endif
318 #endif
319 #endif
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)
325 #if __BSD_VISIBLE
326 #ifndef _RUNE_T_DECLARED
327 typedef __rune_t        rune_t;
328 #define _RUNE_T_DECLARED
329 #endif
330 #endif
331 #endif
332 #endif
333 
334 #ifndef __WCHAR_TYPE__
335 #define __WCHAR_TYPE__ int
336 #endif
337 #ifndef __cplusplus
338 typedef __WCHAR_TYPE__ wchar_t;
339 #endif
340 #endif
341 #endif
342 #endif
343 #endif
344 #endif
345 #endif
346 #endif /* _WCHAR_T_DECLARED */
347 #endif /* _BSD_RUNE_T_DEFINED_ */
348 #endif
349 #endif
350 #endif
351 #endif
352 #endif
353 #endif
354 #endif
355 #endif /* __WCHAR_T__ */
356 #endif /* __wchar_t__ */
357 #undef	__need_wchar_t
358 #endif /* _STDDEF_H or __need_wchar_t.  */
359 
360 #if defined (__need_wint_t)
361 #ifndef _WINT_T
362 #define _WINT_T
363 
364 #ifndef __WINT_TYPE__
365 #define __WINT_TYPE__ unsigned int
366 #endif
367 typedef __WINT_TYPE__ wint_t;
368 #endif
369 #undef __need_wint_t
370 #endif
371 
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_
380 #undef _PTRDIFF_T_
381 #undef _BSD_PTRDIFF_T_
382 #endif
383 #ifdef _GCC_SIZE_T_
384 #undef _SIZE_T_
385 #undef _BSD_SIZE_T_
386 #endif
387 #ifdef _GCC_WCHAR_T_
388 #undef _WCHAR_T_
389 #undef _BSD_WCHAR_T_
390 #endif
391 /*  The following ones are the real ones.  */
392 #ifdef _GCC_PTRDIFF_T
393 #undef _PTRDIFF_T_
394 #undef _BSD_PTRDIFF_T_
395 #endif
396 #ifdef _GCC_SIZE_T
397 #undef _SIZE_T_
398 #undef _BSD_SIZE_T_
399 #endif
400 #ifdef _GCC_WCHAR_T
401 #undef _WCHAR_T_
402 #undef _BSD_WCHAR_T_
403 #endif
404 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ || _X86_64_ANSI_H_ || _I386_ANSI_H_ */
405 
406 #endif /* __sys_stdtypes_h */
407 
408 /* A null pointer constant.  */
409 
410 #if defined (_STDDEF_H) || defined (__need_NULL)
411 #undef NULL		/* in case <stdio.h> has defined it. */
412 #ifdef __GNUG__
413 #define NULL __null
414 #else   /* G++ */
415 #ifndef __cplusplus
416 #define NULL ((void *)0)
417 #else   /* C++ */
418 #define NULL 0
419 #endif  /* C++ */
420 #endif  /* G++ */
421 #endif	/* NULL not defined and <stddef.h> or need NULL.  */
422 #undef	__need_NULL
423 
424 #ifdef _STDDEF_H
425 
426 /* Offset of member MEMBER in a struct of type TYPE. */
427 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
428 
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
435    specifiers.  */
436 typedef struct {
437   long long __max_align_ll __attribute__((__aligned__(__alignof__(long long))));
438   long double __max_align_ld __attribute__((__aligned__(__alignof__(long double))));
439 } max_align_t;
440 #endif
441 #endif /* C11 or C++11.  */
442 
443 #endif /* _STDDEF_H was defined this time */
444 
445 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
446 	  || __need_XXX was not defined before */
447