wcsmbs/wchar.h

   1 /* Copyright (C) 1995-2017 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /*
  19  *      ISO C99 Standard: 7.24
  20  *      Extended multibyte and wide character utilities <wchar.h>
  21  */
  22
  23 #ifndef _WCHAR_H
  24 #define _WCHAR_H 1
  25
  26 #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
  27 #include <bits/libc-header-start.h>
  28
  29 /* Gather machine dependent type support.  */
  30 #include <bits/floatn.h>
  31
  32 #define __need_size_t
  33 #define __need_wchar_t
  34 #define __need_NULL
  35 #include <stddef.h>
  36
  37 #define __need___va_list
  38 #include <stdarg.h>
  39
  40 #include <bits/wchar.h>
  41 #include <bits/types/wint_t.h>
  42 #include <bits/types/mbstate_t.h>
  43 #include <bits/types/__FILE.h>
  44
  45 #if defined __USE_UNIX98 || defined __USE_XOPEN2K
  46 # include <bits/types/FILE.h>
  47 #endif
  48 #ifdef __USE_XOPEN2K8
  49 # include <bits/types/locale_t.h>
  50 #endif
  51
  52 /* Tell the caller that we provide correct C++ prototypes.  */
  53 #if defined __cplusplus && __GNUC_PREREQ (4, 4)
  54 # define __CORRECT_ISO_CPP_WCHAR_H_PROTO
  55 #endif
  56
  57 #ifndef WCHAR_MIN
  58 /* These constants might also be defined in <inttypes.h>.  */
  59 # define WCHAR_MIN __WCHAR_MIN
  60 # define WCHAR_MAX __WCHAR_MAX
  61 #endif
  62
  63 #ifndef WEOF
  64 # define WEOF (0xffffffffu)
  65 #endif
  66
  67 /* All versions of XPG prior to the publication of ISO C99 required
  68    the bulk of <wctype.h>'s declarations to appear in this header
  69    (because <wctype.h> did not exist prior to C99).  In POSIX.1-2001
  70    those declarations were marked as XSI extensions; in -2008 they
  71    were additionally marked as obsolescent.  _GNU_SOURCE mode
  72    anticipates the removal of these declarations in the next revision
  73    of POSIX.  */
  74 #if (defined __USE_XOPEN && !defined __USE_GNU \
  75      && !(defined __USE_XOPEN2K && !defined __USE_XOPEN2KXSI))
  76 # include <bits/wctype-wchar.h>
  77 #endif
  78
  79 __BEGIN_DECLS
  80
  81 /* This incomplete type is defined in <time.h> but needed here because
  82    of `wcsftime'.  */
  83 struct tm;
  84
  85
  86 /* Copy SRC to DEST.  */
  87 extern wchar_t *wcscpy (wchar_t *__restrict __dest,
  88                         const wchar_t *__restrict __src)
  89      __THROW __nonnull ((1, 2));
  90
  91 /* Copy no more than N wide-characters of SRC to DEST.  */
  92 extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
  93                          const wchar_t *__restrict __src, size_t __n)
  94      __THROW __nonnull ((1, 2));
  95
  96 /* Append SRC onto DEST.  */
  97 extern wchar_t *wcscat (wchar_t *__restrict __dest,
  98                         const wchar_t *__restrict __src)
  99      __THROW __nonnull ((1, 2));
 100 /* Append no more than N wide-characters of SRC onto DEST.  */
 101 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
 102                          const wchar_t *__restrict __src, size_t __n)
 103      __THROW __nonnull ((1, 2));
 104
 105 /* Compare S1 and S2.  */
 106 extern int wcscmp (const wchar_t *__s1, const wchar_t *__s2)
 107      __THROW __attribute_pure__ __nonnull ((1, 2));
 108 /* Compare N wide-characters of S1 and S2.  */
 109 extern int wcsncmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
 110      __THROW __attribute_pure__ __nonnull ((1, 2));
 111
 112 #ifdef __USE_XOPEN2K8
 113 /* Compare S1 and S2, ignoring case.  */
 114 extern int wcscasecmp (const wchar_t *__s1, const wchar_t *__s2) __THROW;
 115
 116 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 117 extern int wcsncasecmp (const wchar_t *__s1, const wchar_t *__s2,
 118                         size_t __n) __THROW;
 119
 120 /* Similar to the two functions above but take the information from
 121    the provided locale and not the global locale.  */
 122 extern int wcscasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
 123                          locale_t __loc) __THROW;
 124
 125 extern int wcsncasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
 126                           size_t __n, locale_t __loc) __THROW;
 127 #endif
 128
 129 /* Compare S1 and S2, both interpreted as appropriate to the
 130    LC_COLLATE category of the current locale.  */
 131 extern int wcscoll (const wchar_t *__s1, const wchar_t *__s2) __THROW;
 132 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 133    applied to two transformed strings the result is the as applying
 134    `wcscoll' to the original strings.  */
 135 extern size_t wcsxfrm (wchar_t *__restrict __s1,
 136                        const wchar_t *__restrict __s2, size_t __n) __THROW;
 137
 138 #ifdef __USE_XOPEN2K8
 139 /* Similar to the two functions above but take the information from
 140    the provided locale and not the global locale.  */
 141
 142 /* Compare S1 and S2, both interpreted as appropriate to the
 143    LC_COLLATE category of the given locale.  */
 144 extern int wcscoll_l (const wchar_t *__s1, const wchar_t *__s2,
 145                       locale_t __loc) __THROW;
 146
 147 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 148    applied to two transformed strings the result is the as applying
 149    `wcscoll' to the original strings.  */
 150 extern size_t wcsxfrm_l (wchar_t *__s1, const wchar_t *__s2,
 151                          size_t __n, locale_t __loc) __THROW;
 152
 153 /* Duplicate S, returning an identical malloc'd string.  */
 154 extern wchar_t *wcsdup (const wchar_t *__s) __THROW __attribute_malloc__;
 155 #endif
 156
 157 /* Find the first occurrence of WC in WCS.  */
 158 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 159 extern "C++" wchar_t *wcschr (wchar_t *__wcs, wchar_t __wc)
 160      __THROW __asm ("wcschr") __attribute_pure__;
 161 extern "C++" const wchar_t *wcschr (const wchar_t *__wcs, wchar_t __wc)
 162      __THROW __asm ("wcschr") __attribute_pure__;
 163 #else
 164 extern wchar_t *wcschr (const wchar_t *__wcs, wchar_t __wc)
 165      __THROW __attribute_pure__;
 166 #endif
 167 /* Find the last occurrence of WC in WCS.  */
 168 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 169 extern "C++" wchar_t *wcsrchr (wchar_t *__wcs, wchar_t __wc)
 170      __THROW __asm ("wcsrchr") __attribute_pure__;
 171 extern "C++" const wchar_t *wcsrchr (const wchar_t *__wcs, wchar_t __wc)
 172      __THROW __asm ("wcsrchr") __attribute_pure__;
 173 #else
 174 extern wchar_t *wcsrchr (const wchar_t *__wcs, wchar_t __wc)
 175      __THROW __attribute_pure__;
 176 #endif
 177
 178 #ifdef __USE_GNU
 179 /* This function is similar to `wcschr'.  But it returns a pointer to
 180    the closing NUL wide character in case C is not found in S.  */
 181 extern wchar_t *wcschrnul (const wchar_t *__s, wchar_t __wc)
 182      __THROW __attribute_pure__;
 183 #endif
 184
 185 /* Return the length of the initial segmet of WCS which
 186    consists entirely of wide characters not in REJECT.  */
 187 extern size_t wcscspn (const wchar_t *__wcs, const wchar_t *__reject)
 188      __THROW __attribute_pure__;
 189 /* Return the length of the initial segmet of WCS which
 190    consists entirely of wide characters in  ACCEPT.  */
 191 extern size_t wcsspn (const wchar_t *__wcs, const wchar_t *__accept)
 192      __THROW __attribute_pure__;
 193 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 194 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 195 extern "C++" wchar_t *wcspbrk (wchar_t *__wcs, const wchar_t *__accept)
 196      __THROW __asm ("wcspbrk") __attribute_pure__;
 197 extern "C++" const wchar_t *wcspbrk (const wchar_t *__wcs,
 198                                      const wchar_t *__accept)
 199      __THROW __asm ("wcspbrk") __attribute_pure__;
 200 #else
 201 extern wchar_t *wcspbrk (const wchar_t *__wcs, const wchar_t *__accept)
 202      __THROW __attribute_pure__;
 203 #endif
 204 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 205 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 206 extern "C++" wchar_t *wcsstr (wchar_t *__haystack, const wchar_t *__needle)
 207      __THROW __asm ("wcsstr") __attribute_pure__;
 208 extern "C++" const wchar_t *wcsstr (const wchar_t *__haystack,
 209                                     const wchar_t *__needle)
 210      __THROW __asm ("wcsstr") __attribute_pure__;
 211 #else
 212 extern wchar_t *wcsstr (const wchar_t *__haystack, const wchar_t *__needle)
 213      __THROW __attribute_pure__;
 214 #endif
 215
 216 /* Divide WCS into tokens separated by characters in DELIM.  */
 217 extern wchar_t *wcstok (wchar_t *__restrict __s,
 218                         const wchar_t *__restrict __delim,
 219                         wchar_t **__restrict __ptr) __THROW;
 220
 221 /* Return the number of wide characters in S.  */
 222 extern size_t wcslen (const wchar_t *__s) __THROW __attribute_pure__;
 223
 224 #ifdef __USE_XOPEN
 225 /* Another name for `wcsstr' from XPG4.  */
 226 # ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 227 extern "C++" wchar_t *wcswcs (wchar_t *__haystack, const wchar_t *__needle)
 228      __THROW __asm ("wcswcs") __attribute_pure__;
 229 extern "C++" const wchar_t *wcswcs (const wchar_t *__haystack,
 230                                     const wchar_t *__needle)
 231      __THROW __asm ("wcswcs") __attribute_pure__;
 232 # else
 233 extern wchar_t *wcswcs (const wchar_t *__haystack, const wchar_t *__needle)
 234      __THROW __attribute_pure__;
 235 # endif
 236 #endif
 237
 238 #ifdef __USE_XOPEN2K8
 239 /* Return the number of wide characters in S, but at most MAXLEN.  */
 240 extern size_t wcsnlen (const wchar_t *__s, size_t __maxlen)
 241      __THROW __attribute_pure__;
 242 #endif
 243
 244
 245 /* Search N wide characters of S for C.  */
 246 #ifdef __CORRECT_ISO_CPP_WCHAR_H_PROTO
 247 extern "C++" wchar_t *wmemchr (wchar_t *__s, wchar_t __c, size_t __n)
 248      __THROW __asm ("wmemchr") __attribute_pure__;
 249 extern "C++" const wchar_t *wmemchr (const wchar_t *__s, wchar_t __c,
 250                                      size_t __n)
 251      __THROW __asm ("wmemchr") __attribute_pure__;
 252 #else
 253 extern wchar_t *wmemchr (const wchar_t *__s, wchar_t __c, size_t __n)
 254      __THROW __attribute_pure__;
 255 #endif
 256
 257 /* Compare N wide characters of S1 and S2.  */
 258 extern int wmemcmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
 259      __THROW __attribute_pure__;
 260
 261 /* Copy N wide characters of SRC to DEST.  */
 262 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
 263                          const wchar_t *__restrict __s2, size_t __n) __THROW;
 264
 265 /* Copy N wide characters of SRC to DEST, guaranteeing
 266    correct behavior for overlapping strings.  */
 267 extern wchar_t *wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n)
 268      __THROW;
 269
 270 /* Set N wide characters of S to C.  */
 271 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
 272
 273 #ifdef __USE_GNU
 274 /* Copy N wide characters of SRC to DEST and return pointer to following
 275    wide character.  */
 276 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
 277                           const wchar_t *__restrict __s2, size_t __n)
 278      __THROW;
 279 #endif
 280
 281
 282 /* Determine whether C constitutes a valid (one-byte) multibyte
 283    character.  */
 284 extern wint_t btowc (int __c) __THROW;
 285
 286 /* Determine whether C corresponds to a member of the extended
 287    character set whose multibyte representation is a single byte.  */
 288 extern int wctob (wint_t __c) __THROW;
 289
 290 /* Determine whether PS points to an object representing the initial
 291    state.  */
 292 extern int mbsinit (const mbstate_t *__ps) __THROW __attribute_pure__;
 293
 294 /* Write wide character representation of multibyte character pointed
 295    to by S to PWC.  */
 296 extern size_t mbrtowc (wchar_t *__restrict __pwc,
 297                        const char *__restrict __s, size_t __n,
 298                        mbstate_t *__restrict __p) __THROW;
 299
 300 /* Write multibyte representation of wide character WC to S.  */
 301 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
 302                        mbstate_t *__restrict __ps) __THROW;
 303
 304 /* Return number of bytes in multibyte character pointed to by S.  */
 305 extern size_t __mbrlen (const char *__restrict __s, size_t __n,
 306                         mbstate_t *__restrict __ps) __THROW;
 307 extern size_t mbrlen (const char *__restrict __s, size_t __n,
 308                       mbstate_t *__restrict __ps) __THROW;
 309
 310 #ifdef __USE_EXTERN_INLINES
 311 /* Define inline function as optimization.  */
 312
 313 /* We can use the BTOWC and WCTOB optimizations since we know that all
 314    locales must use ASCII encoding for the values in the ASCII range
 315    and because the wchar_t encoding is always ISO 10646.  */
 316 extern wint_t __btowc_alias (int __c) __asm ("btowc");
 317 __extern_inline wint_t
 318 __NTH (btowc (int __c))
 319 { return (__builtin_constant_p (__c) && __c >= '\0' && __c <= '\x7f'
 320           ? (wint_t) __c : __btowc_alias (__c)); }
 321
 322 extern int __wctob_alias (wint_t __c) __asm ("wctob");
 323 __extern_inline int
 324 __NTH (wctob (wint_t __wc))
 325 { return (__builtin_constant_p (__wc) && __wc >= L'\0' && __wc <= L'\x7f'
 326           ? (int) __wc : __wctob_alias (__wc)); }
 327
 328 __extern_inline size_t
 329 __NTH (mbrlen (const char *__restrict __s, size_t __n,
 330                mbstate_t *__restrict __ps))
 331 { return (__ps != NULL
 332           ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 333 #endif
 334
 335 /* Write wide character representation of multibyte character string
 336    SRC to DST.  */
 337 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 338                          const char **__restrict __src, size_t __len,
 339                          mbstate_t *__restrict __ps) __THROW;
 340
 341 /* Write multibyte character representation of wide character string
 342    SRC to DST.  */
 343 extern size_t wcsrtombs (char *__restrict __dst,
 344                          const wchar_t **__restrict __src, size_t __len,
 345                          mbstate_t *__restrict __ps) __THROW;
 346
 347
 348 #ifdef  __USE_XOPEN2K8
 349 /* Write wide character representation of at most NMC bytes of the
 350    multibyte character string SRC to DST.  */
 351 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 352                           const char **__restrict __src, size_t __nmc,
 353                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 354
 355 /* Write multibyte character representation of at most NWC characters
 356    from the wide character string SRC to DST.  */
 357 extern size_t wcsnrtombs (char *__restrict __dst,
 358                           const wchar_t **__restrict __src,
 359                           size_t __nwc, size_t __len,
 360                           mbstate_t *__restrict __ps) __THROW;
 361 #endif  /* use POSIX 2008 */
 362
 363
 364 /* The following functions are extensions found in X/Open CAE.  */
 365 #ifdef __USE_XOPEN
 366 /* Determine number of column positions required for C.  */
 367 extern int wcwidth (wchar_t __c) __THROW;
 368
 369 /* Determine number of column positions required for first N wide
 370    characters (or fewer if S ends before this) in S.  */
 371 extern int wcswidth (const wchar_t *__s, size_t __n) __THROW;
 372 #endif  /* Use X/Open.  */
 373
 374
 375 /* Convert initial portion of the wide string NPTR to `double'
 376    representation.  */
 377 extern double wcstod (const wchar_t *__restrict __nptr,
 378                       wchar_t **__restrict __endptr) __THROW;
 379
 380 #ifdef __USE_ISOC99
 381 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 382 extern float wcstof (const wchar_t *__restrict __nptr,
 383                      wchar_t **__restrict __endptr) __THROW;
 384 extern long double wcstold (const wchar_t *__restrict __nptr,
 385                             wchar_t **__restrict __endptr) __THROW;
 386 #endif /* C99 */
 387
 388 /* Likewise for `_Float128' when support is enabled.  */
 389 #if __HAVE_FLOAT128 && defined __USE_GNU
 390 extern _Float128 wcstof128 (const wchar_t *__restrict __nptr,
 391                             wchar_t **__restrict __endptr) __THROW;
 392 #endif
 393
 394
 395 /* Convert initial portion of wide string NPTR to `long int'
 396    representation.  */
 397 extern long int wcstol (const wchar_t *__restrict __nptr,
 398                         wchar_t **__restrict __endptr, int __base) __THROW;
 399
 400 /* Convert initial portion of wide string NPTR to `unsigned long int'
 401    representation.  */
 402 extern unsigned long int wcstoul (const wchar_t *__restrict __nptr,
 403                                   wchar_t **__restrict __endptr, int __base)
 404      __THROW;
 405
 406 #ifdef __USE_ISOC99
 407 /* Convert initial portion of wide string NPTR to `long long int'
 408    representation.  */
 409 __extension__
 410 extern long long int wcstoll (const wchar_t *__restrict __nptr,
 411                               wchar_t **__restrict __endptr, int __base)
 412      __THROW;
 413
 414 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 415    representation.  */
 416 __extension__
 417 extern unsigned long long int wcstoull (const wchar_t *__restrict __nptr,
 418                                         wchar_t **__restrict __endptr,
 419                                         int __base) __THROW;
 420 #endif /* ISO C99.  */
 421
 422 #ifdef __USE_GNU
 423 /* Convert initial portion of wide string NPTR to `long long int'
 424    representation.  */
 425 __extension__
 426 extern long long int wcstoq (const wchar_t *__restrict __nptr,
 427                              wchar_t **__restrict __endptr, int __base)
 428      __THROW;
 429
 430 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 431    representation.  */
 432 __extension__
 433 extern unsigned long long int wcstouq (const wchar_t *__restrict __nptr,
 434                                        wchar_t **__restrict __endptr,
 435                                        int __base) __THROW;
 436 #endif /* Use GNU.  */
 437
 438 #ifdef __USE_GNU
 439 /* Parallel versions of the functions above which take the locale to
 440    use as an additional parameter.  These are GNU extensions inspired
 441    by the POSIX.1-2008 extended locale API.  */
 442 extern long int wcstol_l (const wchar_t *__restrict __nptr,
 443                           wchar_t **__restrict __endptr, int __base,
 444                           locale_t __loc) __THROW;
 445
 446 extern unsigned long int wcstoul_l (const wchar_t *__restrict __nptr,
 447                                     wchar_t **__restrict __endptr,
 448                                     int __base, locale_t __loc) __THROW;
 449
 450 __extension__
 451 extern long long int wcstoll_l (const wchar_t *__restrict __nptr,
 452                                 wchar_t **__restrict __endptr,
 453                                 int __base, locale_t __loc) __THROW;
 454
 455 __extension__
 456 extern unsigned long long int wcstoull_l (const wchar_t *__restrict __nptr,
 457                                           wchar_t **__restrict __endptr,
 458                                           int __base, locale_t __loc)
 459      __THROW;
 460
 461 extern double wcstod_l (const wchar_t *__restrict __nptr,
 462                         wchar_t **__restrict __endptr, locale_t __loc)
 463      __THROW;
 464
 465 extern float wcstof_l (const wchar_t *__restrict __nptr,
 466                        wchar_t **__restrict __endptr, locale_t __loc)
 467      __THROW;
 468
 469 extern long double wcstold_l (const wchar_t *__restrict __nptr,
 470                               wchar_t **__restrict __endptr,
 471                               locale_t __loc) __THROW;
 472
 473 # if __HAVE_FLOAT128
 474 extern _Float128 wcstof128_l (const wchar_t *__restrict __nptr,
 475                               wchar_t **__restrict __endptr,
 476                               locale_t __loc) __THROW;
 477 # endif
 478 #endif  /* use GNU */
 479
 480
 481 #ifdef __USE_XOPEN2K8
 482 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 483    DEST.  */
 484 extern wchar_t *wcpcpy (wchar_t *__restrict __dest,
 485                         const wchar_t *__restrict __src) __THROW;
 486
 487 /* Copy no more than N characters of SRC to DEST, returning the address of
 488    the last character written into DEST.  */
 489 extern wchar_t *wcpncpy (wchar_t *__restrict __dest,
 490                          const wchar_t *__restrict __src, size_t __n)
 491      __THROW;
 492 #endif
 493
 494
 495 /* Wide character I/O functions.  */
 496
 497 #if defined __USE_XOPEN2K8 || __GLIBC_USE (LIB_EXT2)
 498 /* Like OPEN_MEMSTREAM, but the stream is wide oriented and produces
 499    a wide character string.  */
 500 extern __FILE *open_wmemstream (wchar_t **__bufloc, size_t *__sizeloc) __THROW;
 501 #endif
 502
 503 #if defined __USE_ISOC95 || defined __USE_UNIX98
 504
 505 /* Select orientation for stream.  */
 506 extern int fwide (__FILE *__fp, int __mode) __THROW;
 507
 508
 509 /* Write formatted output to STREAM.
 510
 511    This function is a possible cancellation point and therefore not
 512    marked with __THROW.  */
 513 extern int fwprintf (__FILE *__restrict __stream,
 514                      const wchar_t *__restrict __format, ...)
 515      /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 516 /* Write formatted output to stdout.
 517
 518    This function is a possible cancellation point and therefore not
 519    marked with __THROW.  */
 520 extern int wprintf (const wchar_t *__restrict __format, ...)
 521      /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 522 /* Write formatted output of at most N characters to S.  */
 523 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 524                      const wchar_t *__restrict __format, ...)
 525      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 526
 527 /* Write formatted output to S from argument list ARG.
 528
 529    This function is a possible cancellation point and therefore not
 530    marked with __THROW.  */
 531 extern int vfwprintf (__FILE *__restrict __s,
 532                       const wchar_t *__restrict __format,
 533                       __gnuc_va_list __arg)
 534      /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 535 /* Write formatted output to stdout from argument list ARG.
 536
 537    This function is a possible cancellation point and therefore not
 538    marked with __THROW.  */
 539 extern int vwprintf (const wchar_t *__restrict __format,
 540                      __gnuc_va_list __arg)
 541      /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 542 /* Write formatted output of at most N character to S from argument
 543    list ARG.  */
 544 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 545                       const wchar_t *__restrict __format,
 546                       __gnuc_va_list __arg)
 547      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 548
 549
 550 /* Read formatted input from STREAM.
 551
 552    This function is a possible cancellation point and therefore not
 553    marked with __THROW.  */
 554 extern int fwscanf (__FILE *__restrict __stream,
 555                     const wchar_t *__restrict __format, ...)
 556      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 557 /* Read formatted input from stdin.
 558
 559    This function is a possible cancellation point and therefore not
 560    marked with __THROW.  */
 561 extern int wscanf (const wchar_t *__restrict __format, ...)
 562      /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 563 /* Read formatted input from S.  */
 564 extern int swscanf (const wchar_t *__restrict __s,
 565                     const wchar_t *__restrict __format, ...)
 566      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 567
 568 # if defined __USE_ISOC99 && !defined __USE_GNU \
 569      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 570      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 571 #  ifdef __REDIRECT
 572 /* For strict ISO C99 or POSIX compliance disallow %as, %aS and %a[
 573    GNU extension which conflicts with valid %a followed by letter
 574    s, S or [.  */
 575 extern int __REDIRECT (fwscanf, (__FILE *__restrict __stream,
 576                                  const wchar_t *__restrict __format, ...),
 577                        __isoc99_fwscanf)
 578      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 579 extern int __REDIRECT (wscanf, (const wchar_t *__restrict __format, ...),
 580                        __isoc99_wscanf)
 581      /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 582 extern int __REDIRECT_NTH (swscanf, (const wchar_t *__restrict __s,
 583                                      const wchar_t *__restrict __format,
 584                                      ...), __isoc99_swscanf)
 585      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 586 #  else
 587 extern int __isoc99_fwscanf (__FILE *__restrict __stream,
 588                              const wchar_t *__restrict __format, ...);
 589 extern int __isoc99_wscanf (const wchar_t *__restrict __format, ...);
 590 extern int __isoc99_swscanf (const wchar_t *__restrict __s,
 591                              const wchar_t *__restrict __format, ...)
 592      __THROW;
 593 #   define fwscanf __isoc99_fwscanf
 594 #   define wscanf __isoc99_wscanf
 595 #   define swscanf __isoc99_swscanf
 596 #  endif
 597 # endif
 598
 599 #endif /* Use ISO C95, C99 and Unix98. */
 600
 601 #ifdef __USE_ISOC99
 602 /* Read formatted input from S into argument list ARG.
 603
 604    This function is a possible cancellation point and therefore not
 605    marked with __THROW.  */
 606 extern int vfwscanf (__FILE *__restrict __s,
 607                      const wchar_t *__restrict __format,
 608                      __gnuc_va_list __arg)
 609      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 610 /* Read formatted input from stdin into argument list ARG.
 611
 612    This function is a possible cancellation point and therefore not
 613    marked with __THROW.  */
 614 extern int vwscanf (const wchar_t *__restrict __format,
 615                     __gnuc_va_list __arg)
 616      /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 617 /* Read formatted input from S into argument list ARG.  */
 618 extern int vswscanf (const wchar_t *__restrict __s,
 619                      const wchar_t *__restrict __format,
 620                      __gnuc_va_list __arg)
 621      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 622
 623 # if !defined __USE_GNU \
 624      && (!defined __LDBL_COMPAT || !defined __REDIRECT) \
 625      && (defined __STRICT_ANSI__ || defined __USE_XOPEN2K)
 626 #  ifdef __REDIRECT
 627 extern int __REDIRECT (vfwscanf, (__FILE *__restrict __s,
 628                                   const wchar_t *__restrict __format,
 629                                   __gnuc_va_list __arg), __isoc99_vfwscanf)
 630      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 631 extern int __REDIRECT (vwscanf, (const wchar_t *__restrict __format,
 632                                  __gnuc_va_list __arg), __isoc99_vwscanf)
 633      /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 634 extern int __REDIRECT_NTH (vswscanf, (const wchar_t *__restrict __s,
 635                                       const wchar_t *__restrict __format,
 636                                       __gnuc_va_list __arg), __isoc99_vswscanf)
 637      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 638 #  else
 639 extern int __isoc99_vfwscanf (__FILE *__restrict __s,
 640                               const wchar_t *__restrict __format,
 641                               __gnuc_va_list __arg);
 642 extern int __isoc99_vwscanf (const wchar_t *__restrict __format,
 643                              __gnuc_va_list __arg);
 644 extern int __isoc99_vswscanf (const wchar_t *__restrict __s,
 645                               const wchar_t *__restrict __format,
 646                               __gnuc_va_list __arg) __THROW;
 647 #   define vfwscanf __isoc99_vfwscanf
 648 #   define vwscanf __isoc99_vwscanf
 649 #   define vswscanf __isoc99_vswscanf
 650 #  endif
 651 # endif
 652
 653 #endif /* Use ISO C99. */
 654
 655
 656 /* Read a character from STREAM.
 657
 658    These functions are possible cancellation points and therefore not
 659    marked with __THROW.  */
 660 extern wint_t fgetwc (__FILE *__stream);
 661 extern wint_t getwc (__FILE *__stream);
 662
 663 /* Read a character from stdin.
 664
 665    This function is a possible cancellation point and therefore not
 666    marked with __THROW.  */
 667 extern wint_t getwchar (void);
 668
 669
 670 /* Write a character to STREAM.
 671
 672    These functions are possible cancellation points and therefore not
 673    marked with __THROW.  */
 674 extern wint_t fputwc (wchar_t __wc, __FILE *__stream);
 675 extern wint_t putwc (wchar_t __wc, __FILE *__stream);
 676
 677 /* Write a character to stdout.
 678
 679    This function is a possible cancellation point and therefore not
 680    marked with __THROW.  */
 681 extern wint_t putwchar (wchar_t __wc);
 682
 683
 684 /* Get a newline-terminated wide character string of finite length
 685    from STREAM.
 686
 687    This function is a possible cancellation point and therefore not
 688    marked with __THROW.  */
 689 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 690                         __FILE *__restrict __stream);
 691
 692 /* Write a string to STREAM.
 693
 694    This function is a possible cancellation point and therefore not
 695    marked with __THROW.  */
 696 extern int fputws (const wchar_t *__restrict __ws,
 697                    __FILE *__restrict __stream);
 698
 699
 700 /* Push a character back onto the input buffer of STREAM.
 701
 702    This function is a possible cancellation point and therefore not
 703    marked with __THROW.  */
 704 extern wint_t ungetwc (wint_t __wc, __FILE *__stream);
 705
 706
 707 #ifdef __USE_GNU
 708 /* These are defined to be equivalent to the `char' functions defined
 709    in POSIX.1:1996.
 710
 711    These functions are not part of POSIX and therefore no official
 712    cancellation point.  But due to similarity with an POSIX interface
 713    or due to the implementation they are cancellation points and
 714    therefore not marked with __THROW.  */
 715 extern wint_t getwc_unlocked (__FILE *__stream);
 716 extern wint_t getwchar_unlocked (void);
 717
 718 /* This is the wide character version of a GNU extension.
 719
 720    This function is not part of POSIX and therefore no official
 721    cancellation point.  But due to similarity with an POSIX interface
 722    or due to the implementation it is a cancellation point and
 723    therefore not marked with __THROW.  */
 724 extern wint_t fgetwc_unlocked (__FILE *__stream);
 725
 726 /* Faster version when locking is not necessary.
 727
 728    This function is not part of POSIX and therefore no official
 729    cancellation point.  But due to similarity with an POSIX interface
 730    or due to the implementation it is a cancellation point and
 731    therefore not marked with __THROW.  */
 732 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream);
 733
 734 /* These are defined to be equivalent to the `char' functions defined
 735    in POSIX.1:1996.
 736
 737    These functions are not part of POSIX and therefore no official
 738    cancellation point.  But due to similarity with an POSIX interface
 739    or due to the implementation they are cancellation points and
 740    therefore not marked with __THROW.  */
 741 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream);
 742 extern wint_t putwchar_unlocked (wchar_t __wc);
 743
 744
 745 /* This function does the same as `fgetws' but does not lock the stream.
 746
 747    This function is not part of POSIX and therefore no official
 748    cancellation point.  But due to similarity with an POSIX interface
 749    or due to the implementation it is a cancellation point and
 750    therefore not marked with __THROW.  */
 751 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 752                                  __FILE *__restrict __stream);
 753
 754 /* This function does the same as `fputws' but does not lock the stream.
 755
 756    This function is not part of POSIX and therefore no official
 757    cancellation point.  But due to similarity with an POSIX interface
 758    or due to the implementation it is a cancellation point and
 759    therefore not marked with __THROW.  */
 760 extern int fputws_unlocked (const wchar_t *__restrict __ws,
 761                             __FILE *__restrict __stream);
 762 #endif
 763
 764
 765 /* Format TP into S according to FORMAT.
 766    Write no more than MAXSIZE wide characters and return the number
 767    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 768 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 769                         const wchar_t *__restrict __format,
 770                         const struct tm *__restrict __tp) __THROW;
 771
 772 # ifdef __USE_GNU
 773 /* Similar to `wcsftime' but takes the information from
 774    the provided locale and not the global locale.  */
 775 extern size_t wcsftime_l (wchar_t *__restrict __s, size_t __maxsize,
 776                           const wchar_t *__restrict __format,
 777                           const struct tm *__restrict __tp,
 778                           locale_t __loc) __THROW;
 779 # endif
 780
 781 /* Define some macros helping to catch buffer overflows.  */
 782 #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
 783 # include <bits/wchar2.h>
 784 #endif
 785
 786 #ifdef __LDBL_COMPAT
 787 # include <bits/wchar-ldbl.h>
 788 #endif
 789
 790 __END_DECLS
 791
 792 #endif /* wchar.h  */