include/wchar.h

   1 /* Copyright (C) 1995-2002, 2003 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
  25 #ifndef __need_mbstate_t
  26 # define _WCHAR_H 1
  27 # include <features.h>
  28 #endif
  29
  30 #ifndef __UCLIBC_HAS_WCHAR__
  31 #error Attempted to include wchar.h when uClibc built without wide char support.
  32 #endif
  33
  34 #ifdef _WCHAR_H
  35 /* Get FILE definition.  */
  36 # define __need___FILE
  37 # ifdef __USE_UNIX98
  38 #  define __need_FILE
  39 # endif
  40 # include <stdio.h>
  41 /* Get va_list definition.  */
  42 # define __need___va_list
  43 # include <stdarg.h>
  44
  45 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  46 # define __need_size_t
  47 # define __need_wchar_t
  48 # define __need_NULL
  49 #endif
  50 #define __need_wint_t
  51 #include <stddef.h>
  52
  53 #include <bits/wchar.h>
  54
  55 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  56    there.  So define it ourselves if it remains undefined.  */
  57 #ifndef _WINT_T
  58 /* Integral type unchanged by default argument promotions that can
  59    hold any value corresponding to members of the extended character
  60    set, as well as at least one value that does not correspond to any
  61    member of the extended character set.  */
  62 # define _WINT_T
  63 typedef unsigned int wint_t;
  64 #else
  65 /* Work around problems with the <stddef.h> file which doesn't put
  66    wint_t in the std namespace.  */
  67 # if defined __cplusplus && defined _GLIBCPP_USE_NAMESPACES \
  68      && defined __WINT_TYPE__
  69 __BEGIN_NAMESPACE_STD
  70 typedef __WINT_TYPE__ wint_t;
  71 __END_NAMESPACE_STD
  72 # endif
  73 #endif
  74
  75
  76 #ifndef __mbstate_t_defined
  77 # define __mbstate_t_defined    1
  78 /* Conversion state information.  */
  79 #if 1
  80 typedef struct
  81 {
  82         wchar_t __mask;
  83         wchar_t __wc;
  84 } __mbstate_t;
  85 #else
  86 typedef struct
  87 {
  88   int __count;
  89   union
  90   {
  91     wint_t __wch;
  92     char __wchb[4];
  93   } __value;            /* Value so far.  */
  94 } __mbstate_t;
  95 #endif
  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_C99
 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 libc_hidden_proto(wcscat)
 155 /* Append no more than N wide-characters of SRC onto DEST.  */
 156 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
 157                          const wchar_t *__restrict __src, size_t __n)
 158      __THROW;
 159
 160 /* Compare S1 and S2.  */
 161 extern int wcscmp (const wchar_t *__s1, const wchar_t *__s2)
 162      __THROW __attribute_pure__;
 163 libc_hidden_proto(wcscmp)
 164 /* Compare N wide-characters of S1 and S2.  */
 165 extern int wcsncmp (const wchar_t *__s1, const wchar_t *__s2, size_t __n)
 166      __THROW __attribute_pure__;
 167 __END_NAMESPACE_C99
 168
 169 #ifdef __USE_GNU
 170 /* Compare S1 and S2, ignoring case.  */
 171 extern int wcscasecmp (const wchar_t *__s1, const wchar_t *__s2) __THROW;
 172
 173 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 174 extern int wcsncasecmp (const wchar_t *__s1, const wchar_t *__s2,
 175                         size_t __n) __THROW;
 176
 177 #ifdef __UCLIBC_HAS_XLOCALE__
 178 /* Similar to the two functions above but take the information from
 179    the provided locale and not the global locale.  */
 180 # include <xlocale.h>
 181
 182 extern int wcscasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
 183                          __locale_t __loc) __THROW;
 184 libc_hidden_proto(wcscasecmp_l)
 185
 186 extern int wcsncasecmp_l (const wchar_t *__s1, const wchar_t *__s2,
 187                           size_t __n, __locale_t __loc) __THROW;
 188 libc_hidden_proto(wcsncasecmp_l)
 189 #endif /* __UCLIBC_HAS_XLOCALE__ */
 190 #endif
 191
 192 __BEGIN_NAMESPACE_C99
 193 /* Compare S1 and S2, both interpreted as appropriate to the
 194    LC_COLLATE category of the current locale.  */
 195 extern int wcscoll (const wchar_t *__s1, const wchar_t *__s2) __THROW;
 196 libc_hidden_proto(wcscoll)
 197 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 198    applied to two transformed strings the result is the as applying
 199    `wcscoll' to the original strings.  */
 200 extern size_t wcsxfrm (wchar_t *__restrict __s1,
 201                        const wchar_t *__restrict __s2, size_t __n) __THROW;
 202 __END_NAMESPACE_C99
 203
 204 #ifdef __USE_GNU
 205 #ifdef __UCLIBC_HAS_XLOCALE__
 206 /* Similar to the two functions above but take the information from
 207    the provided locale and not the global locale.  */
 208
 209 /* Compare S1 and S2, both interpreted as appropriate to the
 210    LC_COLLATE category of the given locale.  */
 211 extern int wcscoll_l (const wchar_t *__s1, const wchar_t *__s2,
 212                       __locale_t __loc) __THROW;
 213 libc_hidden_proto(wcscoll_l)
 214
 215 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 216    applied to two transformed strings the result is the as applying
 217    `wcscoll' to the original strings.  */
 218 extern size_t wcsxfrm_l (wchar_t *__s1, const wchar_t *__s2,
 219                          size_t __n, __locale_t __loc) __THROW;
 220 libc_hidden_proto(wcsxfrm_l)
 221
 222 #endif /* __UCLIBC_HAS_XLOCALE__ */
 223
 224 /* Duplicate S, returning an identical malloc'd string.  */
 225 extern wchar_t *wcsdup (const wchar_t *__s) __THROW __attribute_malloc__;
 226 #endif
 227
 228 __BEGIN_NAMESPACE_C99
 229 /* Find the first occurrence of WC in WCS.  */
 230 extern wchar_t *wcschr (const wchar_t *__wcs, wchar_t __wc)
 231      __THROW __attribute_pure__;
 232 /* Find the last occurrence of WC in WCS.  */
 233 extern wchar_t *wcsrchr (const wchar_t *__wcs, wchar_t __wc)
 234      __THROW __attribute_pure__;
 235 __END_NAMESPACE_C99
 236
 237 #ifdef __USE_GNU
 238 /* This function is similar to `wcschr'.  But it returns a pointer to
 239    the closing NUL wide character in case C is not found in S.  */
 240 extern wchar_t *wcschrnul (const wchar_t *__s, wchar_t __wc)
 241      __THROW __attribute_pure__;
 242 #endif
 243
 244 __BEGIN_NAMESPACE_C99
 245 /* Return the length of the initial segmet of WCS which
 246    consists entirely of wide characters not in REJECT.  */
 247 extern size_t wcscspn (const wchar_t *__wcs, const wchar_t *__reject)
 248      __THROW __attribute_pure__;
 249 /* Return the length of the initial segmet of WCS which
 250    consists entirely of wide characters in  ACCEPT.  */
 251 extern size_t wcsspn (const wchar_t *__wcs, const wchar_t *__accept)
 252      __THROW __attribute_pure__;
 253 libc_hidden_proto(wcsspn)
 254 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 255 extern wchar_t *wcspbrk (const wchar_t *__wcs, const wchar_t *__accept)
 256      __THROW __attribute_pure__;
 257 libc_hidden_proto(wcspbrk)
 258 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 259 /* SuSv uses restrict keyword, glibc does not */
 260 extern wchar_t *wcsstr (const wchar_t *__restrict __haystack, const wchar_t *__restrict __needle)
 261      __THROW __attribute_pure__;
 262
 263 /* Divide WCS into tokens separated by characters in DELIM.  */
 264 extern wchar_t *wcstok (wchar_t *__restrict __s,
 265                         const wchar_t *__restrict __delim,
 266                         wchar_t **__restrict __ptr) __THROW;
 267
 268 /* Return the number of wide characters in S.  */
 269 extern size_t wcslen (const wchar_t *__s) __THROW __attribute_pure__;
 270 libc_hidden_proto(wcslen)
 271 __END_NAMESPACE_C99
 272
 273 #if defined __USE_XOPEN && defined __UCLIBC_SUSV3_LEGACY__
 274 /* Another name for `wcsstr' from XPG4.  */
 275 /* SuSv3 did not use restrict keyword, probably because it was marked LEGACY
 276    we do to be in sync with wcsstr */
 277 extern wchar_t *wcswcs (const wchar_t *__restrict __haystack, const wchar_t *__restrict __needle)
 278      __THROW __attribute_pure__;
 279 #endif
 280
 281 #ifdef __USE_GNU
 282 /* Return the number of wide characters in S, but at most MAXLEN.  */
 283 extern size_t wcsnlen (const wchar_t *__s, size_t __maxlen)
 284      __THROW __attribute_pure__;
 285 libc_hidden_proto(wcsnlen)
 286 #endif
 287
 288
 289 __BEGIN_NAMESPACE_C99
 290 /* Search N wide characters of S for C.  */
 291 extern wchar_t *wmemchr (const wchar_t *__s, wchar_t __c, size_t __n)
 292      __THROW __attribute_pure__;
 293 libc_hidden_proto(wmemchr)
 294
 295 /* Compare N wide characters of S1 and S2.  */
 296 /* SuSv4 does not use restrict keyword for S1 and S2, glibc does */
 297 extern int wmemcmp (const wchar_t *__s1,
 298                     const wchar_t *__s2, size_t __n)
 299      __THROW __attribute_pure__;
 300
 301 /* Copy N wide characters of SRC to DEST.  */
 302 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
 303                          const wchar_t *__restrict __s2, size_t __n) __THROW;
 304 libc_hidden_proto(wmemcpy)
 305
 306 /* Copy N wide characters of SRC to DEST, guaranteeing
 307    correct behavior for overlapping strings.  */
 308 extern wchar_t *wmemmove (wchar_t *__s1, const wchar_t *__s2, size_t __n)
 309      __THROW;
 310
 311 /* Set N wide characters of S to C.  */
 312 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
 313 __END_NAMESPACE_C99
 314
 315 #ifdef __USE_GNU
 316 /* Copy N wide characters of SRC to DEST and return pointer to following
 317    wide character.  */
 318 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
 319                           const wchar_t *__restrict __s2, size_t __n)
 320      __THROW;
 321 libc_hidden_proto(wmempcpy)
 322 #endif
 323
 324
 325 __BEGIN_NAMESPACE_C99
 326 /* Determine whether C constitutes a valid (one-byte) multibyte
 327    character.  */
 328 extern wint_t btowc (int __c) __THROW;
 329 libc_hidden_proto(btowc)
 330
 331 /* Determine whether C corresponds to a member of the extended
 332    character set whose multibyte representation is a single byte.  */
 333 extern int wctob (wint_t __c) __THROW;
 334
 335 /* Determine whether PS points to an object representing the initial
 336    state.  */
 337 extern int mbsinit (const mbstate_t *__ps) __THROW __attribute_pure__;
 338 libc_hidden_proto(mbsinit)
 339
 340 /* Write wide character representation of multibyte character pointed
 341    to by S to PWC.  */
 342 extern size_t mbrtowc (wchar_t *__restrict __pwc,
 343                        const char *__restrict __s, size_t __n,
 344                        mbstate_t *__p) __THROW;
 345 libc_hidden_proto(mbrtowc)
 346
 347 /* Write multibyte representation of wide character WC to S.  */
 348 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
 349                        mbstate_t *__restrict __ps) __THROW;
 350 libc_hidden_proto(wcrtomb)
 351
 352 /* Return number of bytes in multibyte character pointed to by S.  */
 353 #if 0 /* uClibc: disabled */
 354 extern size_t __mbrlen (const char *__restrict __s, size_t __n,
 355                         mbstate_t *__restrict __ps) __THROW;
 356 #endif
 357 extern size_t mbrlen (const char *__restrict __s, size_t __n,
 358                       mbstate_t *__restrict __ps) __THROW;
 359 libc_hidden_proto(mbrlen)
 360
 361 /* Write wide character representation of multibyte character string
 362    SRC to DST.  */
 363 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 364                          const char **__restrict __src, size_t __len,
 365                          mbstate_t *__restrict __ps) __THROW;
 366 libc_hidden_proto(mbsrtowcs)
 367
 368 /* Write multibyte character representation of wide character string
 369    SRC to DST.  */
 370 extern size_t wcsrtombs (char *__restrict __dst,
 371                          const wchar_t **__restrict __src, size_t __len,
 372                          mbstate_t *__restrict __ps) __THROW;
 373 libc_hidden_proto(wcsrtombs)
 374 __END_NAMESPACE_C99
 375
 376
 377 #ifdef  __USE_GNU
 378 /* Write wide character representation of at most NMC bytes of the
 379    multibyte character string SRC to DST.  */
 380 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 381                           const char **__restrict __src, size_t __nmc,
 382                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 383 libc_hidden_proto(mbsnrtowcs)
 384
 385 /* Write multibyte character representation of at most NWC characters
 386    from the wide character string SRC to DST.  */
 387 extern size_t wcsnrtombs (char *__restrict __dst,
 388                           const wchar_t **__restrict __src,
 389                           size_t __nwc, size_t __len,
 390                           mbstate_t *__restrict __ps) __THROW;
 391 libc_hidden_proto(wcsnrtombs)
 392 #endif  /* use GNU */
 393
 394
 395 /* The following functions are extensions found in X/Open CAE.  */
 396 #ifdef __USE_XOPEN
 397 /* Determine number of column positions required for C.  */
 398 extern int wcwidth (wchar_t __c) __THROW;
 399
 400 /* Determine number of column positions required for first N wide
 401    characters (or fewer if S ends before this) in S.  */
 402 extern int wcswidth (const wchar_t *__s, size_t __n) __THROW;
 403 libc_hidden_proto(wcswidth)
 404 #endif  /* Use X/Open.  */
 405
 406
 407 __BEGIN_NAMESPACE_C99
 408 #ifdef __UCLIBC_HAS_FLOATS__
 409 /* Convert initial portion of the wide string NPTR to `double'
 410    representation.  */
 411 extern double wcstod (const wchar_t *__restrict __nptr,
 412                       wchar_t **__restrict __endptr) __THROW;
 413
 414 #ifdef __USE_ISOC99
 415 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 416 extern float wcstof (const wchar_t *__restrict __nptr,
 417                      wchar_t **__restrict __endptr) __THROW;
 418 extern long double wcstold (const wchar_t *__restrict __nptr,
 419                             wchar_t **__restrict __endptr) __THROW;
 420 #endif /* C99 */
 421 #endif /* __UCLIBC_HAS_FLOATS__ */
 422
 423
 424 /* Convert initial portion of wide string NPTR to `long int'
 425    representation.  */
 426 extern long int wcstol (const wchar_t *__restrict __nptr,
 427                         wchar_t **__restrict __endptr, int __base) __THROW;
 428
 429 /* Convert initial portion of wide string NPTR to `unsigned long int'
 430    representation.  */
 431 extern unsigned long int wcstoul (const wchar_t *__restrict __nptr,
 432                                   wchar_t **__restrict __endptr, int __base)
 433      __THROW;
 434
 435 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
 436 /* Convert initial portion of wide string NPTR to `long long int'
 437    representation.  */
 438 __extension__
 439 extern long long int wcstoll (const wchar_t *__restrict __nptr,
 440                               wchar_t **__restrict __endptr, int __base)
 441      __THROW;
 442
 443 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 444    representation.  */
 445 __extension__
 446 extern unsigned long long int wcstoull (const wchar_t *__restrict __nptr,
 447                                         wchar_t **__restrict __endptr,
 448                                         int __base) __THROW;
 449 #endif /* ISO C99 or GCC and GNU.  */
 450 __END_NAMESPACE_C99
 451
 452 #if defined __GNUC__ && defined __USE_GNU
 453 /* Convert initial portion of wide string NPTR to `long long int'
 454    representation.  */
 455 __extension__
 456 extern long long int wcstoq (const wchar_t *__restrict __nptr,
 457                              wchar_t **__restrict __endptr, int __base)
 458      __THROW;
 459
 460 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 461    representation.  */
 462 __extension__
 463 extern unsigned long long int wcstouq (const wchar_t *__restrict __nptr,
 464                                        wchar_t **__restrict __endptr,
 465                                        int __base) __THROW;
 466 #endif /* GCC and use GNU.  */
 467
 468 #ifdef __USE_GNU
 469 #ifdef __UCLIBC_HAS_XLOCALE__
 470 /* The concept of one static locale per category is not very well
 471    thought out.  Many applications will need to process its data using
 472    information from several different locales.  Another application is
 473    the implementation of the internationalization handling in the
 474    upcoming ISO C++ standard library.  To support this another set of
 475    the functions using locale data exist which have an additional
 476    argument.
 477
 478    Attention: all these functions are *not* standardized in any form.
 479    This is a proof-of-concept implementation.  */
 480
 481 /* Structure for reentrant locale using functions.  This is an
 482    (almost) opaque type for the user level programs.  */
 483 # include <xlocale.h>
 484
 485 /* Special versions of the functions above which take the locale to
 486    use as an additional parameter.  */
 487 extern long int wcstol_l (const wchar_t *__restrict __nptr,
 488                           wchar_t **__restrict __endptr, int __base,
 489                           __locale_t __loc) __THROW;
 490
 491 extern unsigned long int wcstoul_l (const wchar_t *__restrict __nptr,
 492                                     wchar_t **__restrict __endptr,
 493                                     int __base, __locale_t __loc) __THROW;
 494
 495 __extension__
 496 extern long long int wcstoll_l (const wchar_t *__restrict __nptr,
 497                                 wchar_t **__restrict __endptr,
 498                                 int __base, __locale_t __loc) __THROW;
 499
 500 __extension__
 501 extern unsigned long long int wcstoull_l (const wchar_t *__restrict __nptr,
 502                                           wchar_t **__restrict __endptr,
 503                                           int __base, __locale_t __loc)
 504      __THROW;
 505
 506 #ifdef __UCLIBC_HAS_FLOATS__
 507 extern double wcstod_l (const wchar_t *__restrict __nptr,
 508                         wchar_t **__restrict __endptr, __locale_t __loc)
 509      __THROW;
 510
 511 extern float wcstof_l (const wchar_t *__restrict __nptr,
 512                        wchar_t **__restrict __endptr, __locale_t __loc)
 513      __THROW;
 514
 515 extern long double wcstold_l (const wchar_t *__restrict __nptr,
 516                               wchar_t **__restrict __endptr,
 517                               __locale_t __loc) __THROW;
 518 #endif /* __UCLIBC_HAS_FLOATS__ */
 519 #endif /* __UCLIBC_HAS_XLOCALE__ */
 520 #endif /* GNU */
 521
 522
 523 #ifdef  __USE_GNU
 524 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 525    DEST.  */
 526 extern wchar_t *wcpcpy (wchar_t *__dest, const wchar_t *__src) __THROW;
 527
 528 /* Copy no more than N characters of SRC to DEST, returning the address of
 529    the last character written into DEST.  */
 530 extern wchar_t *wcpncpy (wchar_t *__dest, const wchar_t *__src, size_t __n)
 531      __THROW;
 532 #endif  /* use GNU */
 533
 534
 535 /* Wide character I/O functions.  */
 536 #if defined __USE_ISOC99 || defined __USE_UNIX98
 537 __BEGIN_NAMESPACE_C99
 538
 539 /* Select orientation for stream.  */
 540 extern int fwide (__FILE *__fp, int __mode) __THROW;
 541
 542
 543 /* Write formatted output to STREAM.
 544
 545    This function is a possible cancellation point and therefore not
 546    marked with __THROW.  */
 547 extern int fwprintf (__FILE *__restrict __stream,
 548                      const wchar_t *__restrict __format, ...)
 549      /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 550 /* Write formatted output to stdout.
 551
 552    This function is a possible cancellation point and therefore not
 553    marked with __THROW.  */
 554 extern int wprintf (const wchar_t *__restrict __format, ...)
 555      /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 556 /* Write formatted output of at most N characters to S.  */
 557 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 558                      const wchar_t *__restrict __format, ...)
 559      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 560
 561 /* Write formatted output to S from argument list ARG.
 562
 563    This function is a possible cancellation point and therefore not
 564    marked with __THROW.  */
 565 extern int vfwprintf (__FILE *__restrict __s,
 566                       const wchar_t *__restrict __format,
 567                       __gnuc_va_list __arg)
 568      /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 569 libc_hidden_proto(vfwprintf)
 570 /* Write formatted output to stdout from argument list ARG.
 571
 572    This function is a possible cancellation point and therefore not
 573    marked with __THROW.  */
 574 extern int vwprintf (const wchar_t *__restrict __format,
 575                      __gnuc_va_list __arg)
 576      /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 577 /* Write formatted output of at most N character to S from argument
 578    list ARG.  */
 579 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 580                       const wchar_t *__restrict __format,
 581                       __gnuc_va_list __arg)
 582      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 583 libc_hidden_proto(vswprintf)
 584
 585
 586 /* Read formatted input from STREAM.
 587
 588    This function is a possible cancellation point and therefore not
 589    marked with __THROW.  */
 590 extern int fwscanf (__FILE *__restrict __stream,
 591                     const wchar_t *__restrict __format, ...)
 592      /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 593 /* Read formatted input from stdin.
 594
 595    This function is a possible cancellation point and therefore not
 596    marked with __THROW.  */
 597 extern int wscanf (const wchar_t *__restrict __format, ...)
 598      /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 599 /* Read formatted input from S.  */
 600 extern int swscanf (const wchar_t *__restrict __s,
 601                     const wchar_t *__restrict __format, ...)
 602      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 603
 604 __END_NAMESPACE_C99
 605 #endif /* Use ISO C99 and Unix98. */
 606
 607 #ifdef __USE_ISOC99
 608 __BEGIN_NAMESPACE_C99
 609
 610 /* Read formatted input from S into argument list ARG.
 611
 612    This function is a possible cancellation point and therefore not
 613    marked with __THROW.  */
 614 extern int vfwscanf (__FILE *__restrict __s,
 615                      const wchar_t *__restrict __format,
 616                      __gnuc_va_list __arg)
 617      /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 618 libc_hidden_proto(vfwscanf)
 619 /* Read formatted input from stdin into argument list ARG.
 620
 621    This function is a possible cancellation point and therefore not
 622    marked with __THROW.  */
 623 extern int vwscanf (const wchar_t *__restrict __format,
 624                     __gnuc_va_list __arg)
 625      /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 626 /* Read formatted input from S into argument list ARG.  */
 627 extern int vswscanf (const wchar_t *__restrict __s,
 628                      const wchar_t *__restrict __format,
 629                      __gnuc_va_list __arg)
 630      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 631 libc_hidden_proto(vswscanf)
 632
 633 __END_NAMESPACE_C99
 634 #endif /* Use ISO C99. */
 635
 636
 637 __BEGIN_NAMESPACE_C99
 638 /* Read a character from STREAM.
 639
 640    These functions are possible cancellation points and therefore not
 641    marked with __THROW.  */
 642 extern wint_t fgetwc (__FILE *__stream);
 643 libc_hidden_proto(fgetwc)
 644 extern wint_t getwc (__FILE *__stream);
 645
 646 /* Read a character from stdin.
 647
 648    This function is a possible cancellation point and therefore not
 649    marked with __THROW.  */
 650 extern wint_t getwchar (void);
 651
 652
 653 /* Write a character to STREAM.
 654
 655    These functions are possible cancellation points and therefore not
 656    marked with __THROW.  */
 657 extern wint_t fputwc (wchar_t __wc, __FILE *__stream);
 658 libc_hidden_proto(fputwc)
 659 extern wint_t putwc (wchar_t __wc, __FILE *__stream);
 660
 661 /* Write a character to stdout.
 662
 663    This function is a possible cancellation point and therefore not
 664    marked with __THROW.  */
 665 extern wint_t putwchar (wchar_t __wc);
 666
 667
 668 /* Get a newline-terminated wide character string of finite length
 669    from STREAM.
 670
 671    This function is a possible cancellation point and therefore not
 672    marked with __THROW.  */
 673 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 674                         __FILE *__restrict __stream);
 675
 676 /* Write a string to STREAM.
 677
 678    This function is a possible cancellation point and therefore not
 679    marked with __THROW.  */
 680 extern int fputws (const wchar_t *__restrict __ws,
 681                    __FILE *__restrict __stream);
 682 libc_hidden_proto(fputws)
 683
 684
 685 /* Push a character back onto the input buffer of STREAM.
 686
 687    This function is a possible cancellation point and therefore not
 688    marked with __THROW.  */
 689 extern wint_t ungetwc (wint_t __wc, __FILE *__stream);
 690 libc_hidden_proto(ungetwc)
 691 __END_NAMESPACE_C99
 692
 693
 694 #ifdef __USE_GNU
 695 /* These are defined to be equivalent to the `char' functions defined
 696    in POSIX.1:1996.
 697
 698    These functions are not part of POSIX and therefore no official
 699    cancellation point.  But due to similarity with an POSIX interface
 700    or due to the implementation they are cancellation points and
 701    therefore not marked with __THROW.  */
 702 extern wint_t getwc_unlocked (__FILE *__stream);
 703 extern wint_t getwchar_unlocked (void);
 704
 705 /* This is the wide character version of a GNU extension.
 706
 707    This function is not part of POSIX and therefore no official
 708    cancellation point.  But due to similarity with an POSIX interface
 709    or due to the implementation it is a cancellation point and
 710    therefore not marked with __THROW.  */
 711 extern wint_t fgetwc_unlocked (__FILE *__stream);
 712 libc_hidden_proto(fgetwc_unlocked)
 713
 714 /* Faster version when locking is not necessary.
 715
 716    This function is not part of POSIX and therefore no official
 717    cancellation point.  But due to similarity with an POSIX interface
 718    or due to the implementation it is a cancellation point and
 719    therefore not marked with __THROW.  */
 720 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream);
 721 libc_hidden_proto(fputwc_unlocked)
 722
 723 /* These are defined to be equivalent to the `char' functions defined
 724    in POSIX.1:1996.
 725
 726    These functions are not part of POSIX and therefore no official
 727    cancellation point.  But due to similarity with an POSIX interface
 728    or due to the implementation they are cancellation points and
 729    therefore not marked with __THROW.  */
 730 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream);
 731 extern wint_t putwchar_unlocked (wchar_t __wc);
 732
 733
 734 /* This function does the same as `fgetws' but does not lock the stream.
 735
 736    This function is not part of POSIX and therefore no official
 737    cancellation point.  But due to similarity with an POSIX interface
 738    or due to the implementation it is a cancellation point and
 739    therefore not marked with __THROW.  */
 740 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 741                                  __FILE *__restrict __stream);
 742 libc_hidden_proto(fgetws_unlocked)
 743
 744 /* This function does the same as `fputws' but does not lock the stream.
 745
 746    This function is not part of POSIX and therefore no official
 747    cancellation point.  But due to similarity with an POSIX interface
 748    or due to the implementation it is a cancellation point and
 749    therefore not marked with __THROW.  */
 750 extern int fputws_unlocked (const wchar_t *__restrict __ws,
 751                             __FILE *__restrict __stream);
 752 libc_hidden_proto(fputws_unlocked)
 753 #endif
 754
 755
 756 __BEGIN_NAMESPACE_C99
 757 /* Format TP into S according to FORMAT.
 758    Write no more than MAXSIZE wide characters and return the number
 759    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 760 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 761                         const wchar_t *__restrict __format,
 762                         const struct tm *__restrict __tp) __THROW;
 763 __END_NAMESPACE_C99
 764
 765 # if defined __USE_GNU && defined __UCLIBC_HAS_XLOCALE__
 766 # include <xlocale.h>
 767
 768 /* Similar to `wcsftime' but takes the information from
 769    the provided locale and not the global locale.  */
 770 extern size_t wcsftime_l (wchar_t *__restrict __s, size_t __maxsize,
 771                           const wchar_t *__restrict __format,
 772                           const struct tm *__restrict __tp,
 773                           __locale_t __loc) __THROW;
 774 libc_hidden_proto(wcsftime_l)
 775 # endif
 776
 777 /* The X/Open standard demands that most of the functions defined in
 778    the <wctype.h> header must also appear here.  This is probably
 779    because some X/Open members wrote their implementation before the
 780    ISO C standard was published and introduced the better solution.
 781    We have to provide these definitions for compliance reasons but we
 782    do this nonsense only if really necessary.  */
 783 #if defined __USE_UNIX98 && !defined __USE_GNU
 784 # define __need_iswxxx
 785 # include <wctype.h>
 786 #endif
 787
 788 #ifdef _LIBC
 789 extern size_t __wcslcpy(wchar_t *__restrict dst,
 790                         const wchar_t *__restrict src, size_t n) attribute_hidden;
 791 #endif
 792
 793 __END_DECLS
 794
 795 #endif  /* _WCHAR_H defined */
 796
 797 #endif /* wchar.h  */