contrib/gcc-4.7/gcc/ginclude/stddef.h

   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 */