wcsmbs/wchar.h

   1 /* Copyright (C) 1995-2008, 2009, 2010 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /*
  20  *      ISO C99 Standard: 7.24
  21  *      Extended multibyte and wide character utilities <wchar.h>
  22  */
  23
  24 #ifndef _WCHAR_H
  25
  26 #if !defined __need_mbstate_t && !defined __need_wint_t
  27 # define _WCHAR_H 1
  28 # include <features.h>
  29 #endif
  30
  31 #ifdef _WCHAR_H
  32 /* Get FILE definition.  */
  33 # define __need___FILE
  34 # if defined __USE_UNIX98 || defined __USE_XOPEN2K
  35 #  define __need_FILE
  36 # endif
  37 # include <stdio.h>
  38 /* Get va_list definition.  */
  39 # define __need___va_list
  40 # include <stdarg.h>
  41
  42 # include <bits/wchar.h>
  43
  44 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  45 # define __need_size_t
  46 # define __need_wchar_t
  47 # define __need_NULL
  48 #endif
  49 #if defined _WCHAR_H || defined __need_wint_t || !defined __WINT_TYPE__
  50 # undef __need_wint_t
  51 # define __need_wint_t
  52 # include <stddef.h>
  53
  54 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  55    there.  So define it ourselves if it remains undefined.  */
  56 # ifndef _WINT_T
  57 /* Integral type unchanged by default argument promotions that can
  58    hold any value corresponding to members of the extended character
  59    set, as well as at least one value that does not correspond to any
  60    member of the extended character set.  */
  61 #  define _WINT_T
  62 typedef unsigned int wint_t;
  63 # else
  64 /* Work around problems with the <stddef.h> file which doesn't put
  65    wint_t in the std namespace.  */
  66 #  if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES \
  67       && defined __WINT_TYPE__
  68 __BEGIN_NAMESPACE_STD
  69 typedef __WINT_TYPE__ wint_t;
  70 __END_NAMESPACE_STD
  71 #  endif
  72 # endif
  73
  74 /* Tell the caller that we provide correct C++ prototypes.  */
  75 # if defined __cplusplus && __GNUC_PREREQ (4, 4)
  76 #  define __CORRECT_ISO_CPP_WCHAR_H_PROTO
  77 # endif
  78 #endif
  79
  80 #if (defined _WCHAR_H || defined __need_mbstate_t) && !defined __mbstate_t_defined
  81 # define __mbstate_t_defined    1
  82 /* Conversion state information.  */
  83 typedef struct
  84 {
  85   int __count;
  86   union
  87   {
  88 # ifdef __WINT_TYPE__
  89     __WINT_TYPE__ __wch;
  90 # else
  91     wint_t __wch;
  92 # endif
  93     char __wchb[4];
  94   } __value;            /* Value so far.  */
  95 } __mbstate_t;
  96 #endif
  97 #undef __need_mbstate_t
  98
  99
 100 /* The rest of the file is only used if used if __need_mbstate_t is not
 101    defined.  */
 102 #ifdef _WCHAR_H
 103
 104 __BEGIN_NAMESPACE_C99
 105 /* Public type.  */
 106 typedef __mbstate_t mbstate_t;
 107 __END_NAMESPACE_C99
 108 #ifdef __USE_GNU
 109 __USING_NAMESPACE_C99(mbstate_t)
 110 #endif
 111
 112 #ifndef WCHAR_MIN
 113 /* These constants might also be defined in <inttypes.h>.  */
 114 # define WCHAR_MIN __WCHAR_MIN
 115 # define WCHAR_MAX __WCHAR_MAX
 116 #endif
 117
 118 #ifndef WEOF
 119 # define WEOF (0xffffffffu)
 120 #endif
 121
 122 /* For XPG4 compliance we have to define the stuff from <wctype.h> here
 123    as well.  */
 124 #if defined __USE_XOPEN && !defined __USE_UNIX98
 125 # include <wctype.h>
 126 #endif
 127
 128
 129 __BEGIN_DECLS
 130
 131 __BEGIN_NAMESPACE_STD
 132 /* This incomplete type is defined in <time.h> but needed here because
 133    of `wcsftime'.  */
 134 struct tm;
 135 __END_NAMESPACE_STD
 136 /* XXX We have to clean this up at some point.  Since tm is in the std
 137    namespace but wcsftime is in __c99 the type wouldn't be found
 138    without inserting it in the global namespace.  */
 139 __USING_NAMESPACE_STD(tm)
 140
 141
 142 __BEGIN_NAMESPACE_STD
 143 /* Copy SRC to DEST.  */
 144 extern wchar_t *wcscpy (wchar_t *__restrict __dest,
 145                         __const wchar_t *__restrict __src) __THROW;
 146 /* Copy no more than N wide-characters of SRC to DEST.  */
 147 extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
 148                          __const wchar_t *__restrict __src, size_t __n)
 149      __THROW;
 150
 151 /* Append SRC onto DEST.  */
 152 extern wchar_t *wcscat (wchar_t *__restrict __dest,
 153                         __const wchar_t *__restrict __src) __THROW;
 154 /* Append no more than N wide-characters of SRC onto DEST.  */
 155 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
 156                          __const wchar_t *__restrict __src, size_t __n)
 157      __THROW;
 158
 159 /* Compare S1 and S2.  */
 160 extern int wcscmp (__const wchar_t *__s1, __const wchar_t *__s2)
 161      __THROW __attribute_pure__;
 162 /* Compare N wide-characters of S1 and S2.  */
 163 extern int wcsncmp (__const wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 164      __THROW __attribute_pure__;
 165 __END_NAMESPACE_STD
 166
 167 #ifdef __USE_XOPEN2K8
 168 /* Compare S1 and S2, ignoring case.  */
 169 extern int wcscasecmp (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 170
 171 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 172 extern int wcsncasecmp (__const wchar_t *__s1, __const wchar_t *__s2,
 173                         size_t __n) __THROW;
 174
 175 /* Similar to the two functions above but take the information from
 176    the provided locale and not the global locale.  */
 177 # include <xlocale.h>
 178
 179 extern int wcscasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 180                          __locale_t __loc) __THROW;
 181
 182 extern int wcsncasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 183                           size_t __n, __locale_t __loc) __THROW;
 184 #endif
 185
 186 __BEGIN_NAMESPACE_STD
 187 /* Compare S1 and S2, both interpreted as appropriate to the
 188    LC_COLLATE category of the current locale.  */
 189 extern int wcscoll (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 190 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 191    applied to two transformed strings the result is the as applying
 192    `wcscoll' to the original strings.  */
 193 extern size_t wcsxfrm (wchar_t *__restrict __s1,
 194                        __const wchar_t *__restrict __s2, size_t __n) __THROW;
 195 __END_NAMESPACE_STD
 196
 197 #ifdef __USE_XOPEN2K8
 198 /* Similar to the two functions above but take the information from
 199    the provided locale and not the global locale.  */
 200
 201 /* Compare S1 and S2, both interpreted as appropriate to the
 202    LC_COLLATE category of the given locale.  */
 203 extern int wcscoll_l (__const wchar_t *__s1, __const wchar_t *__s2,
 204                       __locale_t __loc) __THROW;
 205
 206 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 207    applied to two transformed strings the result is the as applying
 208    `wcscoll' to the original strings.  */
 209 extern size_t wcsxfrm_l (wchar_t *__s1, __const wchar_t *__s2,
 210                          size_t __n, __locale_t __loc) __THROW;
 211
 212 /* Duplicate S, returning an identical malloc'd string.  */
 213 extern wchar_t *wcsdup (__const wchar_t *__s) __THROW __attribute_malloc__;
 214 #endif
 215
 216 __BEGIN_NAMESPACE_STD
 217 /* Find the first occurrence of WC in WCS.  */
 218 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 219 extern "C++" wchar_t *wcschr (wchar_t *__wcs, wchar_t __wc)
 220      __THROW __asm ("wcschr") __attribute_pure__;
 221 extern "C++" __const wchar_t *wcschr (__const wchar_t *__wcs, wchar_t __wc)
 222      __THROW __asm ("wcschr") __attribute_pure__;
 223 #else
 224 extern wchar_t *wcschr (__const wchar_t *__wcs, wchar_t __wc)
 225      __THROW __attribute_pure__;
 226 #endif
 227 /* Find the last occurrence of WC in WCS.  */
 228 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 229 extern "C++" wchar_t *wcsrchr (wchar_t *__wcs, wchar_t __wc)
 230      __THROW __asm ("wcsrchr") __attribute_pure__;
 231 extern "C++" __const wchar_t *wcsrchr (__const wchar_t *__wcs, wchar_t __wc)
 232      __THROW __asm ("wcsrchr") __attribute_pure__;
 233 #else
 234 extern wchar_t *wcsrchr (__const wchar_t *__wcs, wchar_t __wc)
 235      __THROW __attribute_pure__;
 236 #endif
 237 __END_NAMESPACE_STD
 238
 239 #ifdef __USE_GNU
 240 /* This function is similar to `wcschr'.  But it returns a pointer to
 241    the closing NUL wide character in case C is not found in S.  */
 242 extern wchar_t *wcschrnul (__const wchar_t *__s, wchar_t __wc)
 243      __THROW __attribute_pure__;
 244 #endif
 245
 246 __BEGIN_NAMESPACE_STD
 247 /* Return the length of the initial segmet of WCS which
 248    consists entirely of wide characters not in REJECT.  */
 249 extern size_t wcscspn (__const wchar_t *__wcs, __const wchar_t *__reject)
 250      __THROW __attribute_pure__;
 251 /* Return the length of the initial segmet of WCS which
 252    consists entirely of wide characters in  ACCEPT.  */
 253 extern size_t wcsspn (__const wchar_t *__wcs, __const wchar_t *__accept)
 254      __THROW __attribute_pure__;
 255 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 256 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 257 extern "C++" wchar_t *wcspbrk (wchar_t *__wcs, __const wchar_t *__accept)
 258      __THROW __asm ("wcspbrk") __attribute_pure__;
 259 extern "C++" __const wchar_t *wcspbrk (__const wchar_t *__wcs,
 260                                        __const wchar_t *__accept)
 261      __THROW __asm ("wcspbrk") __attribute_pure__;
 262 #else
 263 extern wchar_t *wcspbrk (__const wchar_t *__wcs, __const wchar_t *__accept)
 264      __THROW __attribute_pure__;
 265 #endif
 266 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 267 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 268 extern "C++" wchar_t *wcsstr (wchar_t *__haystack, __const wchar_t *__needle)
 269      __THROW __asm ("wcsstr") __attribute_pure__;
 270 extern "C++" __const wchar_t *wcsstr (__const wchar_t *__haystack,
 271                                       __const wchar_t *__needle)
 272      __THROW __asm ("wcsstr") __attribute_pure__;
 273 #else
 274 extern wchar_t *wcsstr (__const wchar_t *__haystack, __const wchar_t *__needle)
 275      __THROW __attribute_pure__;
 276 #endif
 277
 278 /* Divide WCS into tokens separated by characters in DELIM.  */
 279 extern wchar_t *wcstok (wchar_t *__restrict __s,
 280                         __const wchar_t *__restrict __delim,
 281                         wchar_t **__restrict __ptr) __THROW;
 282
 283 /* Return the number of wide characters in S.  */
 284 extern size_t wcslen (__const wchar_t *__s) __THROW __attribute_pure__;
 285 __END_NAMESPACE_STD
 286
 287 #ifdef __USE_XOPEN
 288 /* Another name for `wcsstr' from XPG4.  */
 289 # ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 290 extern "C++" wchar_t *wcswcs (wchar_t *__haystack, __const wchar_t *__needle)
 291      __THROW __asm ("wcswcs") __attribute_pure__;
 292 extern "C++" __const wchar_t *wcswcs (__const wchar_t *__haystack,
 293                                       __const wchar_t *__needle)
 294      __THROW __asm ("wcswcs") __attribute_pure__;
 295 # else
 296 extern wchar_t *wcswcs (__const wchar_t *__haystack, __const wchar_t *__needle)
 297      __THROW __attribute_pure__;
 298 # endif
 299 #endif
 300
 301 #ifdef __USE_XOPEN2K8
 302 /* Return the number of wide characters in S, but at most MAXLEN.  */
 303 extern size_t wcsnlen (__const wchar_t *__s, size_t __maxlen)
 304      __THROW __attribute_pure__;
 305 #endif
 306
 307
 308 __BEGIN_NAMESPACE_STD
 309 /* Search N wide characters of S for C.  */
 310 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 311 extern "C++" wchar_t *wmemchr (wchar_t *__s, wchar_t __c, size_t __n)
 312      __THROW __asm ("wmemchr") __attribute_pure__;
 313 extern "C++" __const wchar_t *wmemchr (__const wchar_t *__s, wchar_t __c,
 314                                        size_t __n)
 315      __THROW __asm ("wmemchr") __attribute_pure__;
 316 #else
 317 extern wchar_t *wmemchr (__const wchar_t *__s, wchar_t __c, size_t __n)
 318      __THROW __attribute_pure__;
 319 #endif
 320
 321 /* Compare N wide characters of S1 and S2.  */
 322 extern int wmemcmp (__const wchar_t *__restrict __s1,
 323                     __const wchar_t *__restrict __s2, size_t __n)
 324      __THROW __attribute_pure__;
 325
 326 /* Copy N wide characters of SRC to DEST.  */
 327 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
 328                          __const wchar_t *__restrict __s2, size_t __n) __THROW;
 329
 330 /* Copy N wide characters of SRC to DEST, guaranteeing
 331    correct behavior for overlapping strings.  */
 332 extern wchar_t *wmemmove (wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 333      __THROW;
 334
 335 /* Set N wide characters of S to C.  */
 336 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
 337 __END_NAMESPACE_STD
 338
 339 #ifdef __USE_GNU
 340 /* Copy N wide characters of SRC to DEST and return pointer to following
 341    wide character.  */
 342 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
 343                           __const wchar_t *__restrict __s2, size_t __n)
 344      __THROW;
 345 #endif
 346
 347
 348 __BEGIN_NAMESPACE_STD
 349 /* Determine whether C constitutes a valid (one-byte) multibyte
 350    character.  */
 351 extern wint_t btowc (int __c) __THROW;
 352
 353 /* Determine whether C corresponds to a member of the extended
 354    character set whose multibyte representation is a single byte.  */
 355 extern int wctob (wint_t __c) __THROW;
 356
 357 /* Determine whether PS points to an object representing the initial
 358    state.  */
 359 extern int mbsinit (__const mbstate_t *__ps) __THROW __attribute_pure__;
 360
 361 /* Write wide character representation of multibyte character pointed
 362    to by S to PWC.  */
 363 extern size_t mbrtowc (wchar_t *__restrict __pwc,
 364                        __const char *__restrict __s, size_t __n,
 365                        mbstate_t *__p) __THROW;
 366
 367 /* Write multibyte representation of wide character WC to S.  */
 368 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
 369                        mbstate_t *__restrict __ps) __THROW;
 370
 371 /* Return number of bytes in multibyte character pointed to by S.  */
 372 extern size_t __mbrlen (__const char *__restrict __s, size_t __n,
 373                         mbstate_t *__restrict __ps) __THROW;
 374 extern size_t mbrlen (__const char *__restrict __s, size_t __n,
 375                       mbstate_t *__restrict __ps) __THROW;
 376 __END_NAMESPACE_STD
 377
 378 #ifdef __USE_EXTERN_INLINES
 379 /* Define inline function as optimization.  */
 380
 381 /* We can use the BTOWC and WCTOB optimizations since we know that all
 382    locales must use ASCII encoding for the values in the ASCII range
 383    and because the wchar_t encoding is always ISO 10646.  */
 384 extern wint_t __btowc_alias (int __c) __asm ("btowc");
 385 __extern_inline wint_t
 386 __NTH (btowc (int __c))
 387 { return (__builtin_constant_p (__c) && __c >= '\0' && __c <= '\x7f'
 388           ? (wint_t) __c : __btowc_alias (__c)); }
 389
 390 extern int __wctob_alias (wint_t __c) __asm ("wctob");
 391 __extern_inline int
 392 __NTH (wctob (wint_t __wc))
 393 { return (__builtin_constant_p (__wc) && __wc >= L'\0' && __wc <= L'\x7f'
 394           ? (int) __wc : __wctob_alias (__wc)); }
 395
 396 __extern_inline size_t
 397 __NTH (mbrlen (__const char *__restrict __s, size_t __n,
 398                mbstate_t *__restrict __ps))
 399 { return (__ps != NULL
 400           ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 401 #endif
 402
 403 __BEGIN_NAMESPACE_STD
 404 /* Write wide character representation of multibyte character string
 405    SRC to DST.  */
 406 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 407                          __const char **__restrict __src, size_t __len,
 408                          mbstate_t *__restrict __ps) __THROW;
 409
 410 /* Write multibyte character representation of wide character string
 411    SRC to DST.  */
 412 extern size_t wcsrtombs (char *__restrict __dst,
 413                          __const wchar_t **__restrict __src, size_t __len,
 414                          mbstate_t *__restrict __ps) __THROW;
 415 __END_NAMESPACE_STD
 416
 417
 418 #ifdef  __USE_XOPEN2K8
 419 /* Write wide character representation of at most NMC bytes of the
 420    multibyte character string SRC to DST.  */
 421 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 422                           __const char **__restrict __src, size_t __nmc,
 423                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 424
 425 /* Write multibyte character representation of at most NWC characters
 426    from the wide character string SRC to DST.  */
 427 extern size_t wcsnrtombs (char *__restrict __dst,
 428                           __const wchar_t **__restrict __src,
 429                           size_t __nwc, size_t __len,
 430                           mbstate_t *__restrict __ps) __THROW;
 431 #endif  /* use POSIX 2008 */
 432
 433
 434 /* The following functions are extensions found in X/Open CAE.  */
 435 #ifdef __USE_XOPEN
 436 /* Determine number of column positions required for C.  */
 437 extern int wcwidth (wchar_t __c) __THROW;
 438
 439 /* Determine number of column positions required for first N wide
 440    characters (or fewer if S ends before this) in S.  */
 441 extern int wcswidth (__const wchar_t *__s, size_t __n) __THROW;
 442 #endif  /* Use X/Open.  */
 443
 444
 445 __BEGIN_NAMESPACE_STD
 446 /* Convert initial portion of the wide string NPTR to `double'
 447    representation.  */
 448 extern double wcstod (__const wchar_t *__restrict __nptr,
 449                       wchar_t **__restrict __endptr) __THROW;
 450 __END_NAMESPACE_STD
 451
 452 #ifdef __USE_ISOC99
 453 __BEGIN_NAMESPACE_C99
 454 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 455 extern float wcstof (__const wchar_t *__restrict __nptr,
 456                      wchar_t **__restrict __endptr) __THROW;
 457 extern long double wcstold (__const wchar_t *__restrict __nptr,
 458                             wchar_t **__restrict __endptr) __THROW;
 459 __END_NAMESPACE_C99
 460 #endif /* C99 */
 461
 462
 463 __BEGIN_NAMESPACE_STD
 464 /* Convert initial portion of wide string NPTR to `long int'
 465    representation.  */
 466 extern long int wcstol (__const wchar_t *__restrict __nptr,
 467                         wchar_t **__restrict __endptr, int __base) __THROW;
 468
 469 /* Convert initial portion of wide string NPTR to `unsigned long int'
 470    representation.  */
 471 extern unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 472                                   wchar_t **__restrict __endptr, int __base)
 473      __THROW;
 474 __END_NAMESPACE_STD
 475
 476 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
 477 __BEGIN_NAMESPACE_C99
 478 /* Convert initial portion of wide string NPTR to `long long int'
 479    representation.  */
 480 __extension__
 481 extern long long int wcstoll (__const wchar_t *__restrict __nptr,
 482                               wchar_t **__restrict __endptr, int __base)
 483      __THROW;
 484
 485 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 486    representation.  */
 487 __extension__
 488 extern unsigned long long int wcstoull (__const wchar_t *__restrict __nptr,
 489                                         wchar_t **__restrict __endptr,
 490                                         int __base) __THROW;
 491 __END_NAMESPACE_C99
 492 #endif /* ISO C99 or GCC and GNU.  */
 493
 494 #if defined __GNUC__ && defined __USE_GNU
 495 /* Convert initial portion of wide string NPTR to `long long int'
 496    representation.  */
 497 __extension__
 498 extern long long int wcstoq (__const wchar_t *__restrict __nptr,
 499                              wchar_t **__restrict __endptr, int __base)
 500      __THROW;
 501
 502 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 503    representation.  */
 504 __extension__
 505 extern unsigned long long int wcstouq (__const wchar_t *__restrict __nptr,
 506                                        wchar_t **__restrict __endptr,
 507                                        int __base) __THROW;
 508 #endif /* GCC and use GNU.  */
 509
 510 #ifdef __USE_GNU
 511 /* The concept of one static locale per category is not very well
 512    thought out.  Many applications will need to process its data using
 513    information from several different locales.  Another application is
 514    the implementation of the internationalization handling in the
 515    upcoming ISO C++ standard library.  To support this another set of
 516    the functions using locale data exist which have an additional
 517    argument.
 518
 519    Attention: all these functions are *not* standardized in any form.
 520    This is a proof-of-concept implementation.  */
 521
 522 /* Structure for reentrant locale using functions.  This is an
 523    (almost) opaque type for the user level programs.  */
 524 # include <xlocale.h>
 525
 526 /* Special versions of the functions above which take the locale to
 527    use as an additional parameter.  */
 528 extern long int wcstol_l (__const wchar_t *__restrict __nptr,
 529                           wchar_t **__restrict __endptr, int __base,
 530                           __locale_t __loc) __THROW;
 531
 532 extern unsigned long int wcstoul_l (__const wchar_t *__restrict __nptr,
 533                                     wchar_t **__restrict __endptr,
 534                                     int __base, __locale_t __loc) __THROW;
 535
 536 __extension__
 537 extern long long int wcstoll_l (__const wchar_t *__restrict __nptr,
 538                                 wchar_t **__restrict __endptr,
 539                                 int __base, __locale_t __loc) __THROW;
 540
 541 __extension__
 542 extern unsigned long long int wcstoull_l (__const wchar_t *__restrict __nptr,
 543                                           wchar_t **__restrict __endptr,
 544                                           int __base, __locale_t __loc)
 545      __THROW;
 546
 547 extern double wcstod_l (__const wchar_t *__restrict __nptr,
 548                         wchar_t **__restrict __endptr, __locale_t __loc)
 549      __THROW;
 550
 551 extern float wcstof_l (__const wchar_t *__restrict __nptr,
 552                        wchar_t **__restrict __endptr, __locale_t __loc)
 553      __THROW;
 554
 555 extern long double wcstold_l (__const wchar_t *__restrict __nptr,
 556                               wchar_t **__restrict __endptr,
 557                               __locale_t __loc) __THROW;
 558 #endif /* GNU */
 559
 560
 561 #ifdef  __USE_XOPEN2K8
 562 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 563    DEST.  */
 564 extern wchar_t *wcpcpy (wchar_t *__dest, __const wchar_t *__src) __THROW;
 565
 566 /* Copy no more than N characters of SRC to DEST, returning the address of
 567    the last character written into DEST.  */
 568 extern wchar_t *wcpncpy (wchar_t *__dest, __const wchar_t *__src, size_t __n)
 569      __THROW;
 570 #endif  /* use GNU */
 571
 572
 573 /* Wide character I/O functions.  */
 574
 575 #ifdef  __USE_XOPEN2K8
 576 /* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces
 577    a wide character string.  */
 578 extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW;
 579 #endif
 580
 581 #if defined __USE_ISOC95 || defined __USE_UNIX98
 582 __BEGIN_NAMESPACE_STD
 583
 584 /* Select orientation for stream.  */
 585 extern int fwide (__FILE *__fp, int __mode) __THROW;
 586
 587
 588 /* Write formatted output to STREAM.
 589
 590    This function is a possible cancellation point and therefore not
 591    marked with __THROW.  */
 592 extern int fwprintf (__FILE *__restrict __stream,
 593                      __const wchar_t *__restrict __format, ...)
 594      /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 595 /* Write formatted output to stdout.
 596
 597    This function is a possible cancellation point and therefore not
 598    marked with __THROW.  */
 599 extern int wprintf (__const wchar_t *__restrict __format, ...)
 600      /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 601 /* Write formatted output of at most N characters to S.  */
 602 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 603                      __const wchar_t *__restrict __format, ...)
 604      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 605
 606 /* Write formatted output to S from argument list ARG.
 607
 608    This function is a possible cancellation point and therefore not
 609    marked with __THROW.  */
 610 extern int vfwprintf (__FILE *__restrict __s,
 611                       __const wchar_t *__restrict __format,
 612                       __gnuc_va_list __arg)
 613      /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 614 /* Write formatted output to stdout from argument list ARG.
 615
 616    This function is a possible cancellation point and therefore not
 617    marked with __THROW.  */
 618 extern int vwprintf (__const wchar_t *__restrict __format,
 619                      __gnuc_va_list __arg)
 620      /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 621 /* Write formatted output of at most N character to S from argument
 622    list ARG.  */
 623 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 624                       __const wchar_t *__restrict __format,
 625                       __gnuc_va_list __arg)
 626      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 627
 628
 629 /* Read formatted input from STREAM.
 630
 631    This function is a possible cancellation point and therefore not
 632    marked with __THROW.  */
 633 extern int fwscanf (__FILE *__restrict __stream,
 634                     __const wchar_t *__restrict __format, ...)
 635      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 636 /* Read formatted input from stdin.
 637
 638    This function is a possible cancellation point and therefore not
 639    marked with __THROW.  */
 640 extern int wscanf (__const wchar_t *__restrict __format, ...)
 641      /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 642 /* Read formatted input from S.  */
 643 extern int swscanf (__const wchar_t *__restrict __s,
 644                     __const wchar_t *__restrict __format, ...)
 645      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 646
 647 # if defined __USE_ISOC99 && !defined __USE_GNU \
 648      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 649      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 650 #  ifdef __REDIRECT
 651 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 652    GNU extension which conflicts with valid %a followed by letter
 653    s, S or [.  */
 654 extern int __REDIRECT (fwscanf, (__FILE *__restrict __stream,
 655                                  __const wchar_t *__restrict __format, ...),
 656                        __isoc99_fwscanf)
 657      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 658 extern int __REDIRECT (wscanf, (__const wchar_t *__restrict __format, ...),
 659                        __isoc99_wscanf)
 660      /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 661 extern int __REDIRECT (swscanf, (__const wchar_t *__restrict __s,
 662                                  __const wchar_t *__restrict __format, ...),
 663                        __isoc99_swscanf)
 664      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 665 #  else
 666 extern int __isoc99_fwscanf (__FILE *__restrict __stream,
 667                              __const wchar_t *__restrict __format, ...);
 668 extern int __isoc99_wscanf (__const wchar_t *__restrict __format, ...);
 669 extern int __isoc99_swscanf (__const wchar_t *__restrict __s,
 670                              __const wchar_t *__restrict __format, ...)
 671      __THROW;
 672 #   define fwscanf __isoc99_fwscanf
 673 #   define wscanf __isoc99_wscanf
 674 #   define swscanf __isoc99_swscanf
 675 #  endif
 676 # endif
 677
 678 __END_NAMESPACE_STD
 679 #endif /* Use ISO C95, C99 and Unix98. */
 680
 681 #ifdef __USE_ISOC99
 682 __BEGIN_NAMESPACE_C99
 683 /* Read formatted input from S into argument list ARG.
 684
 685    This function is a possible cancellation point and therefore not
 686    marked with __THROW.  */
 687 extern int vfwscanf (__FILE *__restrict __s,
 688                      __const wchar_t *__restrict __format,
 689                      __gnuc_va_list __arg)
 690      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 691 /* Read formatted input from stdin into argument list ARG.
 692
 693    This function is a possible cancellation point and therefore not
 694    marked with __THROW.  */
 695 extern int vwscanf (__const wchar_t *__restrict __format,
 696                     __gnuc_va_list __arg)
 697      /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 698 /* Read formatted input from S into argument list ARG.  */
 699 extern int vswscanf (__const wchar_t *__restrict __s,
 700                      __const wchar_t *__restrict __format,
 701                      __gnuc_va_list __arg)
 702      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 703
 704 # if !defined __USE_GNU \
 705      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 706      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 707 #  ifdef __REDIRECT
 708 extern int __REDIRECT (vfwscanf, (__FILE *__restrict __s,
 709                                   __const wchar_t *__restrict __format,
 710                                   __gnuc_va_list __arg), __isoc99_vfwscanf)
 711      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 712 extern int __REDIRECT (vwscanf, (__const wchar_t *__restrict __format,
 713                                  __gnuc_va_list __arg), __isoc99_vwscanf)
 714      /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 715 extern int __REDIRECT (vswscanf, (__const wchar_t *__restrict __s,
 716                                   __const wchar_t *__restrict __format,
 717                                   __gnuc_va_list __arg), __isoc99_vswscanf)
 718      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 719 #  else
 720 extern int __isoc99_vfwscanf (__FILE *__restrict __s,
 721                               __const wchar_t *__restrict __format,
 722                               __gnuc_va_list __arg);
 723 extern int __isoc99_vwscanf (__const wchar_t *__restrict __format,
 724                              __gnuc_va_list __arg);
 725 extern int __isoc99_vswscanf (__const wchar_t *__restrict __s,
 726                               __const wchar_t *__restrict __format,
 727                               __gnuc_va_list __arg) __THROW;
 728 #   define vfwscanf __isoc99_vfwscanf
 729 #   define vwscanf __isoc99_vwscanf
 730 #   define vswscanf __isoc99_vswscanf
 731 #  endif
 732 # endif
 733
 734 __END_NAMESPACE_C99
 735 #endif /* Use ISO C99. */
 736
 737
 738 __BEGIN_NAMESPACE_STD
 739 /* Read a character from STREAM.
 740
 741    These functions are possible cancellation points and therefore not
 742    marked with __THROW.  */
 743 extern wint_t fgetwc (__FILE *__stream);
 744 extern wint_t getwc (__FILE *__stream);
 745
 746 /* Read a character from stdin.
 747
 748    This function is a possible cancellation point and therefore not
 749    marked with __THROW.  */
 750 extern wint_t getwchar (void);
 751
 752
 753 /* Write a character to STREAM.
 754
 755    These functions are possible cancellation points and therefore not
 756    marked with __THROW.  */
 757 extern wint_t fputwc (wchar_t __wc, __FILE *__stream);
 758 extern wint_t putwc (wchar_t __wc, __FILE *__stream);
 759
 760 /* Write a character to stdout.
 761
 762    This function is a possible cancellation points and therefore not
 763    marked with __THROW.  */
 764 extern wint_t putwchar (wchar_t __wc);
 765
 766
 767 /* Get a newline-terminated wide character string of finite length
 768    from STREAM.
 769
 770    This function is a possible cancellation points and therefore not
 771    marked with __THROW.  */
 772 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 773                         __FILE *__restrict __stream);
 774
 775 /* Write a string to STREAM.
 776
 777    This function is a possible cancellation points and therefore not
 778    marked with __THROW.  */
 779 extern int fputws (__const wchar_t *__restrict __ws,
 780                    __FILE *__restrict __stream);
 781
 782
 783 /* Push a character back onto the input buffer of STREAM.
 784
 785    This function is a possible cancellation points and therefore not
 786    marked with __THROW.  */
 787 extern wint_t ungetwc (wint_t __wc, __FILE *__stream);
 788 __END_NAMESPACE_STD
 789
 790
 791 #ifdef __USE_GNU
 792 /* These are defined to be equivalent to the `char' functions defined
 793    in POSIX.1:1996.
 794
 795    These functions are not part of POSIX and therefore no official
 796    cancellation point.  But due to similarity with an POSIX interface
 797    or due to the implementation they are cancellation points and
 798    therefore not marked with __THROW.  */
 799 extern wint_t getwc_unlocked (__FILE *__stream);
 800 extern wint_t getwchar_unlocked (void);
 801
 802 /* This is the wide character version of a GNU extension.
 803
 804    This function is not part of POSIX and therefore no official
 805    cancellation point.  But due to similarity with an POSIX interface
 806    or due to the implementation it is a cancellation point and
 807    therefore not marked with __THROW.  */
 808 extern wint_t fgetwc_unlocked (__FILE *__stream);
 809
 810 /* Faster version when locking is not necessary.
 811
 812    This function is not part of POSIX and therefore no official
 813    cancellation point.  But due to similarity with an POSIX interface
 814    or due to the implementation it is a cancellation point and
 815    therefore not marked with __THROW.  */
 816 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream);
 817
 818 /* These are defined to be equivalent to the `char' functions defined
 819    in POSIX.1:1996.
 820
 821    These functions are not part of POSIX and therefore no official
 822    cancellation point.  But due to similarity with an POSIX interface
 823    or due to the implementation they are cancellation points and
 824    therefore not marked with __THROW.  */
 825 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream);
 826 extern wint_t putwchar_unlocked (wchar_t __wc);
 827
 828
 829 /* This function does the same as `fgetws' but does not lock the stream.
 830
 831    This function is not part of POSIX and therefore no official
 832    cancellation point.  But due to similarity with an POSIX interface
 833    or due to the implementation it is a cancellation point and
 834    therefore not marked with __THROW.  */
 835 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 836                                  __FILE *__restrict __stream);
 837
 838 /* This function does the same as `fputws' but does not lock the stream.
 839
 840    This function is not part of POSIX and therefore no official
 841    cancellation point.  But due to similarity with an POSIX interface
 842    or due to the implementation it is a cancellation point and
 843    therefore not marked with __THROW.  */
 844 extern int fputws_unlocked (__const wchar_t *__restrict __ws,
 845                             __FILE *__restrict __stream);
 846 #endif
 847
 848
 849 __BEGIN_NAMESPACE_C99
 850 /* Format TP into S according to FORMAT.
 851    Write no more than MAXSIZE wide characters and return the number
 852    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 853 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 854                         __const wchar_t *__restrict __format,
 855                         __const struct tm *__restrict __tp) __THROW;
 856 __END_NAMESPACE_C99
 857
 858 # ifdef __USE_GNU
 859 # include <xlocale.h>
 860
 861 /* Similar to `wcsftime' but takes the information from
 862    the provided locale and not the global locale.  */
 863 extern size_t wcsftime_l (wchar_t *__restrict __s, size_t __maxsize,
 864                           __const wchar_t *__restrict __format,
 865                           __const struct tm *__restrict __tp,
 866                           __locale_t __loc) __THROW;
 867 # endif
 868
 869 /* The X/Open standard demands that most of the functions defined in
 870    the <wctype.h> header must also appear here.  This is probably
 871    because some X/Open members wrote their implementation before the
 872    ISO C standard was published and introduced the better solution.
 873    We have to provide these definitions for compliance reasons but we
 874    do this nonsense only if really necessary.  */
 875 #if defined __USE_UNIX98 && !defined __USE_GNU
 876 # define __need_iswxxx
 877 # include <wctype.h>
 878 #endif
 879
 880 /* Define some macros helping to catch buffer overflows.  */
 881 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
 882 # include <bits/wchar2.h>
 883 #endif
 884
 885 #ifdef __LDBL_COMPAT
 886 # include <bits/wchar-ldbl.h>
 887 #endif
 888
 889 __END_DECLS
 890
 891 #endif  /* _WCHAR_H defined */
 892
 893 #endif /* wchar.h  */
 894
 895 /* Undefine all __need_* constants in case we are included to get those
 896    constants but the whole file was already read.  */
 897 #undef __need_mbstate_t
 898 #undef __need_wint_t