wcsmbs/wchar.h

   1 /* Copyright (C) 1995-1999, 2000, 2001 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 #ifndef __need_mbstate_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 # ifdef __USE_UNIX98
  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 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  43 # define __need_size_t
  44 # define __need_wchar_t
  45 # define __need_NULL
  46 #endif
  47 #define __need_wint_t
  48 #include <stddef.h>
  49
  50 #include <bits/wchar.h>
  51
  52 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  53    there.  So define it ourselves if it remains undefined.  */
  54 #ifndef _WINT_T
  55 /* Integral type unchanged by default argument promotions that can
  56    hold any value corresponding to members of the extended character
  57    set, as well as at least one value that does not correspond to any
  58    member of the extended character set.  */
  59 # define _WINT_T
  60 typedef unsigned int wint_t;
  61 #endif
  62
  63
  64 #ifndef __mbstate_t_defined
  65 # define __mbstate_t_defined    1
  66 /* Conversion state information.  */
  67 typedef struct
  68 {
  69   int __count;
  70   union
  71   {
  72     wint_t __wch;
  73     char __wchb[4];
  74   } __value;            /* Value so far.  */
  75 } __mbstate_t;
  76 #endif
  77 #undef __need_mbstate_t
  78
  79
  80 /* The rest of the file is only used if used if __need_mbstate_t is not
  81    defined.  */
  82 #ifdef _WCHAR_H
  83
  84 /* Public type.  */
  85 typedef __mbstate_t mbstate_t;
  86
  87 #ifndef WCHAR_MIN
  88 /* These constants might also be defined in <inttypes.h>.  */
  89 # define WCHAR_MIN __WCHAR_MIN
  90 # define WCHAR_MAX __WCHAR_MAX
  91 #endif
  92
  93 #ifndef WEOF
  94 # define WEOF (0xffffffffu)
  95 #endif
  96
  97 /* For XPG4 compliance we have to define the stuff from <wctype.h> here
  98    as well.  */
  99 #if defined __USE_XOPEN && !defined __USE_UNIX98
 100 # include <wctype.h>
 101 #endif
 102
 103 /* This incomplete type is defined in <time.h> but needed here because
 104    of `wcsftime'.  */
 105 struct tm;
 106
 107
 108 __BEGIN_DECLS
 109
 110 /* Copy SRC to DEST.  */
 111 extern wchar_t *wcscpy (wchar_t *__restrict __dest,
 112                         __const wchar_t *__restrict __src) __THROW;
 113 /* Copy no more than N wide-characters of SRC to DEST.  */
 114 extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
 115                          __const wchar_t *__restrict __src, size_t __n)
 116      __THROW;
 117
 118 /* Append SRC onto DEST.  */
 119 extern wchar_t *wcscat (wchar_t *__restrict __dest,
 120                         __const wchar_t *__restrict __src) __THROW;
 121 /* Append no more than N wide-characters of SRC onto DEST.  */
 122 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
 123                          __const wchar_t *__restrict __src, size_t __n)
 124      __THROW;
 125
 126 /* Compare S1 and S2.  */
 127 extern int wcscmp (__const wchar_t *__s1, __const wchar_t *__s2)
 128      __THROW __attribute_pure__;
 129 /* Compare N wide-characters of S1 and S2.  */
 130 extern int wcsncmp (__const wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 131      __THROW __attribute_pure__;
 132
 133 #ifdef __USE_GNU
 134 /* Compare S1 and S2, ignoring case.  */
 135 extern int wcscasecmp (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 136
 137 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 138 extern int wcsncasecmp (__const wchar_t *__s1, __const wchar_t *__s2,
 139                         size_t __n) __THROW;
 140
 141 /* Similar to the two functions above but take the information from
 142    the provided locale and not the global locale.  */
 143 # include <xlocale.h>
 144
 145 extern int __wcscasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 146                            __locale_t __loc) __THROW;
 147
 148 extern int __wcsncasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 149                             size_t __n, __locale_t __loc) __THROW;
 150 #endif
 151
 152 /* Compare S1 and S2, both interpreted as appropriate to the
 153    LC_COLLATE category of the current locale.  */
 154 extern int wcscoll (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 155 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 156    applied to two transformed strings the result is the as applying
 157    `wcscoll' to the original strings.  */
 158 extern size_t wcsxfrm (wchar_t *__restrict __s1,
 159                        __const wchar_t *__restrict __s2, size_t __n) __THROW;
 160
 161 #ifdef __USE_GNU
 162 /* Similar to the two functions above but take the information from
 163    the provided locale and not the global locale.  */
 164
 165 /* Compare S1 and S2, both interpreted as appropriate to the
 166    LC_COLLATE category of the given locale.  */
 167 extern int __wcscoll_l (__const wchar_t *__s1, __const wchar_t *__s2,
 168                         __locale_t __loc) __THROW;
 169 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 170    applied to two transformed strings the result is the as applying
 171    `wcscoll' to the original strings.  */
 172 extern size_t __wcsxfrm_l (wchar_t *__s1, __const wchar_t *__s2,
 173                            size_t __n, __locale_t __loc) __THROW;
 174
 175 /* Duplicate S, returning an identical malloc'd string.  */
 176 extern wchar_t *wcsdup (__const wchar_t *__s) __THROW __attribute_malloc__;
 177 #endif
 178
 179 /* Find the first occurrence of WC in WCS.  */
 180 extern wchar_t *wcschr (__const wchar_t *__wcs, wchar_t __wc)
 181      __THROW __attribute_pure__;
 182 /* Find the last occurrence of WC in WCS.  */
 183 extern wchar_t *wcsrchr (__const wchar_t *__wcs, wchar_t __wc)
 184      __THROW __attribute_pure__;
 185
 186 #ifdef __USE_GNU
 187 /* This function is similar to `wcschr'.  But it returns a pointer to
 188    the closing NUL wide character in case C is not found in S.  */
 189 extern wchar_t *wcschrnul (__const wchar_t *__s, wchar_t __wc)
 190      __THROW __attribute_pure__;
 191 #endif
 192
 193 /* Return the length of the initial segmet of WCS which
 194    consists entirely of wide characters not in REJECT.  */
 195 extern size_t wcscspn (__const wchar_t *__wcs, __const wchar_t *__reject)
 196      __THROW __attribute_pure__;
 197 /* Return the length of the initial segmet of WCS which
 198    consists entirely of wide characters in  ACCEPT.  */
 199 extern size_t wcsspn (__const wchar_t *__wcs, __const wchar_t *__accept)
 200      __THROW __attribute_pure__;
 201 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 202 extern wchar_t *wcspbrk (__const wchar_t *__wcs, __const wchar_t *__accept)
 203      __THROW __attribute_pure__;
 204 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 205 extern wchar_t *wcsstr (__const wchar_t *__haystack, __const wchar_t *__needle)
 206      __THROW __attribute_pure__;
 207
 208 #ifdef __USE_XOPEN
 209 /* Another name for `wcsstr' from XPG4.  */
 210 extern wchar_t *wcswcs (__const wchar_t *__haystack, __const wchar_t *__needle)
 211      __THROW __attribute_pure__;
 212 #endif
 213
 214 /* Divide WCS into tokens separated by characters in DELIM.  */
 215 extern wchar_t *wcstok (wchar_t *__restrict __s,
 216                         __const wchar_t *__restrict __delim,
 217                         wchar_t **__restrict __ptr) __THROW;
 218
 219 /* Return the number of wide characters in S.  */
 220 extern size_t wcslen (__const wchar_t *__s) __THROW __attribute_pure__;
 221
 222 #ifdef __USE_GNU
 223 /* Return the number of wide characters in S, but at most MAXLEN.  */
 224 extern size_t wcsnlen (__const wchar_t *__s, size_t __maxlen)
 225      __THROW __attribute_pure__;
 226 #endif
 227
 228
 229 /* Search N wide characters of S for C.  */
 230 extern wchar_t *wmemchr (__const wchar_t *__s, wchar_t __c, size_t __n)
 231      __THROW __attribute_pure__;
 232
 233 /* Compare N wide characters of S1 and S2.  */
 234 extern int wmemcmp (__const wchar_t *__restrict __s1,
 235                     __const wchar_t *__restrict __s2, size_t __n)
 236      __THROW __attribute_pure__;
 237
 238 /* Copy N wide characters of SRC to DEST.  */
 239 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
 240                          __const wchar_t *__restrict __s2, size_t __n) __THROW;
 241
 242 /* Copy N wide characters of SRC to DEST, guaranteeing
 243    correct behavior for overlapping strings.  */
 244 extern wchar_t *wmemmove (wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 245      __THROW;
 246
 247 /* Set N wide characters of S to C.  */
 248 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
 249
 250 #ifdef __USE_GNU
 251 /* Copy N wide characters of SRC to DEST and return pointer to following
 252    wide character.  */
 253 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
 254                           __const wchar_t *__restrict __s2, size_t __n)
 255      __THROW;
 256 #endif
 257
 258
 259 /* Determine whether C constitutes a valid (one-byte) multibyte
 260    character.  */
 261 extern wint_t btowc (int __c) __THROW;
 262
 263 /* Determine whether C corresponds to a member of the extended
 264    character set whose multibyte representation is a single byte.  */
 265 extern int wctob (wint_t __c) __THROW;
 266
 267 /* Determine whether PS points to an object representing the initial
 268    state.  */
 269 extern int mbsinit (__const mbstate_t *__ps) __THROW __attribute_pure__;
 270
 271 /* Write wide character representation of multibyte character pointed
 272    to by S to PWC.  */
 273 extern size_t mbrtowc (wchar_t *__restrict __pwc,
 274                        __const char *__restrict __s, size_t __n,
 275                        mbstate_t *__p) __THROW;
 276
 277 /* Write multibyte representation of wide character WC to S.  */
 278 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
 279                        mbstate_t *__restrict __ps) __THROW;
 280
 281 /* Return number of bytes in multibyte character pointed to by S.  */
 282 extern size_t __mbrlen (__const char *__restrict __s, size_t __n,
 283                         mbstate_t *__restrict __ps) __THROW;
 284 extern size_t mbrlen (__const char *__restrict __s, size_t __n,
 285                       mbstate_t *__restrict __ps) __THROW;
 286
 287 #ifdef __USE_EXTERN_INLINES
 288 /* Define inline function as optimization.  */
 289 extern __inline size_t mbrlen (__const char *__restrict __s, size_t __n,
 290                                mbstate_t *__restrict __ps) __THROW
 291 { return (__ps != NULL
 292           ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 293 #endif
 294
 295 /* Write wide character representation of multibyte character string
 296    SRC to DST.  */
 297 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 298                          __const char **__restrict __src, size_t __len,
 299                          mbstate_t *__restrict __ps) __THROW;
 300
 301 /* Write multibyte character representation of wide character string
 302    SRC to DST.  */
 303 extern size_t wcsrtombs (char *__restrict __dst,
 304                          __const wchar_t **__restrict __src, size_t __len,
 305                          mbstate_t *__restrict __ps) __THROW;
 306
 307
 308 #ifdef  __USE_GNU
 309 /* Write wide character representation of at most NMC bytes of the
 310    multibyte character string SRC to DST.  */
 311 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 312                           __const char **__restrict __src, size_t __nmc,
 313                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 314
 315 /* Write multibyte character representation of at most NWC characters
 316    from the wide character string SRC to DST.  */
 317 extern size_t wcsnrtombs (char *__restrict __dst,
 318                           __const wchar_t **__restrict __src,
 319                           size_t __nwc, size_t __len,
 320                           mbstate_t *__restrict __ps) __THROW;
 321 #endif  /* use GNU */
 322
 323
 324 /* The following functions are extensions found in X/Open CAE.  */
 325 #ifdef __USE_XOPEN
 326 /* Determine number of column positions required for C.  */
 327 extern int wcwidth (wchar_t __c) __THROW;
 328
 329 /* Determine number of column positions required for first N wide
 330    characters (or fewer if S ends before this) in S.  */
 331 extern int wcswidth (__const wchar_t *__s, size_t __n) __THROW;
 332 #endif  /* Use X/Open.  */
 333
 334
 335 /* Convert initial portion of the wide string NPTR to `double'
 336    representation.  */
 337 extern double wcstod (__const wchar_t *__restrict __nptr,
 338                       wchar_t **__restrict __endptr) __THROW;
 339
 340 #ifdef __USE_ISOC99
 341 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 342 extern float wcstof (__const wchar_t *__restrict __nptr,
 343                      wchar_t **__restrict __endptr) __THROW;
 344 extern long double wcstold (__const wchar_t *__restrict __nptr,
 345                             wchar_t **__restrict __endptr) __THROW;
 346 #endif /* C99 */
 347
 348
 349 /* Convert initial portion of wide string NPTR to `long int'
 350    representation.  */
 351 extern long int wcstol (__const wchar_t *__restrict __nptr,
 352                         wchar_t **__restrict __endptr, int __base) __THROW;
 353
 354 /* Convert initial portion of wide string NPTR to `unsigned long int'
 355    representation.  */
 356 extern unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 357                                   wchar_t **__restrict __endptr, int __base)
 358      __THROW;
 359
 360 #if defined __GNUC__ && defined __USE_GNU
 361 /* Convert initial portion of wide string NPTR to `long int'
 362    representation.  */
 363 __extension__
 364 extern long long int wcstoq (__const wchar_t *__restrict __nptr,
 365                              wchar_t **__restrict __endptr, int __base)
 366      __THROW;
 367
 368 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 369    representation.  */
 370 __extension__
 371 extern unsigned long long int wcstouq (__const wchar_t *__restrict __nptr,
 372                                        wchar_t **__restrict __endptr,
 373                                        int __base) __THROW;
 374 #endif /* GCC and use GNU.  */
 375
 376 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
 377 /* Convert initial portion of wide string NPTR to `long int'
 378    representation.  */
 379 __extension__
 380 extern long long int wcstoll (__const wchar_t *__restrict __nptr,
 381                               wchar_t **__restrict __endptr, int __base)
 382      __THROW;
 383
 384 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 385    representation.  */
 386 __extension__
 387 extern unsigned long long int wcstoull (__const wchar_t *__restrict __nptr,
 388                                         wchar_t **__restrict __endptr,
 389                                         int __base) __THROW;
 390 #endif /* ISO C99 or GCC and GNU.  */
 391
 392 #ifdef __USE_GNU
 393 /* The concept of one static locale per category is not very well
 394    thought out.  Many applications will need to process its data using
 395    information from several different locales.  Another application is
 396    the implementation of the internationalization handling in the
 397    upcoming ISO C++ standard library.  To support this another set of
 398    the functions using locale data exist which have an additional
 399    argument.
 400
 401    Attention: all these functions are *not* standardized in any form.
 402    This is a proof-of-concept implementation.  */
 403
 404 /* Structure for reentrant locale using functions.  This is an
 405    (almost) opaque type for the user level programs.  */
 406 # include <xlocale.h>
 407
 408 /* Special versions of the functions above which take the locale to
 409    use as an additional parameter.  */
 410 extern long int __wcstol_l (__const wchar_t *__restrict __nptr,
 411                             wchar_t **__restrict __endptr, int __base,
 412                             __locale_t __loc) __THROW;
 413
 414 extern unsigned long int __wcstoul_l (__const wchar_t *__restrict __nptr,
 415                                       wchar_t **__restrict __endptr,
 416                                       int __base, __locale_t __loc) __THROW;
 417
 418 __extension__
 419 extern long long int __wcstoll_l (__const wchar_t *__restrict __nptr,
 420                                   wchar_t **__restrict __endptr,
 421                                   int __base, __locale_t __loc) __THROW;
 422
 423 __extension__
 424 extern unsigned long long int __wcstoull_l (__const wchar_t *__restrict __nptr,
 425                                             wchar_t **__restrict __endptr,
 426                                             int __base, __locale_t __loc)
 427      __THROW;
 428
 429 extern double __wcstod_l (__const wchar_t *__restrict __nptr,
 430                           wchar_t **__restrict __endptr, __locale_t __loc)
 431      __THROW;
 432
 433 extern float __wcstof_l (__const wchar_t *__restrict __nptr,
 434                          wchar_t **__restrict __endptr, __locale_t __loc)
 435      __THROW;
 436
 437 extern long double __wcstold_l (__const wchar_t *__restrict __nptr,
 438                                 wchar_t **__restrict __endptr,
 439                                 __locale_t __loc) __THROW;
 440 #endif /* GNU */
 441
 442
 443 /* The internal entry points for `wcstoX' take an extra flag argument
 444    saying whether or not to parse locale-dependent number grouping.  */
 445 extern double __wcstod_internal (__const wchar_t *__restrict __nptr,
 446                                  wchar_t **__restrict __endptr, int __group)
 447      __THROW;
 448 extern float __wcstof_internal (__const wchar_t *__restrict __nptr,
 449                                 wchar_t **__restrict __endptr, int __group)
 450      __THROW;
 451 extern long double __wcstold_internal (__const wchar_t *__restrict __nptr,
 452                                        wchar_t **__restrict __endptr,
 453                                        int __group) __THROW;
 454
 455 #ifndef __wcstol_internal_defined
 456 extern long int __wcstol_internal (__const wchar_t *__restrict __nptr,
 457                                    wchar_t **__restrict __endptr,
 458                                    int __base, int __group) __THROW;
 459 # define __wcstol_internal_defined      1
 460 #endif
 461 #ifndef __wcstoul_internal_defined
 462 extern unsigned long int __wcstoul_internal (__const wchar_t *__restrict __npt,
 463                                              wchar_t **__restrict __endptr,
 464                                              int __base, int __group) __THROW;
 465 # define __wcstoul_internal_defined     1
 466 #endif
 467 #ifndef __wcstoll_internal_defined
 468 __extension__
 469 extern long long int __wcstoll_internal (__const wchar_t *__restrict __nptr,
 470                                          wchar_t **__restrict __endptr,
 471                                          int __base, int __group) __THROW;
 472 # define __wcstoll_internal_defined     1
 473 #endif
 474 #ifndef __wcstoull_internal_defined
 475 __extension__
 476 extern unsigned long long int __wcstoull_internal (__const wchar_t *
 477                                                    __restrict __nptr,
 478                                                    wchar_t **
 479                                                    __restrict __endptr,
 480                                                    int __base,
 481                                                    int __group) __THROW;
 482 # define __wcstoull_internal_defined    1
 483 #endif
 484
 485
 486 #if defined __OPTIMIZE__ && __GNUC__ >= 2
 487 /* Define inline functions which call the internal entry points.  */
 488
 489 extern __inline double wcstod (__const wchar_t *__restrict __nptr,
 490                                wchar_t **__restrict __endptr) __THROW
 491 { return __wcstod_internal (__nptr, __endptr, 0); }
 492 extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
 493                                  wchar_t **__restrict __endptr,
 494                                  int __base) __THROW
 495 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 496 extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 497                                            wchar_t **__restrict __endptr,
 498                                            int __base) __THROW
 499 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 500
 501 # ifdef __USE_GNU
 502 extern __inline float wcstof (__const wchar_t *__restrict __nptr,
 503                               wchar_t **__restrict __endptr) __THROW
 504 { return __wcstof_internal (__nptr, __endptr, 0); }
 505 extern __inline long double wcstold (__const wchar_t *__restrict __nptr,
 506                                      wchar_t **__restrict __endptr) __THROW
 507 { return __wcstold_internal (__nptr, __endptr, 0); }
 508
 509
 510 __extension__
 511 extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
 512                                       wchar_t **__restrict __endptr,
 513                                       int __base) __THROW
 514 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
 515 __extension__
 516 extern __inline unsigned long long int wcstouq (__const wchar_t *
 517                                                 __restrict __nptr,
 518                                                 wchar_t **__restrict __endptr,
 519                                                 int __base) __THROW
 520 { return __wcstoull_internal (__nptr, __endptr, __base, 0); }
 521 # endif /* Use GNU.  */
 522 #endif /* Optimizing GCC >=2.  */
 523
 524
 525 #ifdef  __USE_GNU
 526 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 527    DEST.  */
 528 extern wchar_t *wcpcpy (wchar_t *__dest, __const wchar_t *__src) __THROW;
 529
 530 /* Copy no more than N characters of SRC to DEST, returning the address of
 531    the last character written into DEST.  */
 532 extern wchar_t *wcpncpy (wchar_t *__dest, __const wchar_t *__src, size_t __n)
 533      __THROW;
 534 #endif  /* use GNU */
 535
 536
 537 /* Wide character I/O functions.  */
 538 #if defined __USE_ISOC99 || defined __USE_UNIX98
 539
 540 /* Select orientation for stream.  */
 541 extern int fwide (__FILE *__fp, int __mode) __THROW;
 542
 543
 544 /* Write formatted output to STREAM.  */
 545 extern int fwprintf (__FILE *__restrict __stream,
 546                      __const wchar_t *__restrict __format, ...)
 547      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 548 /* Write formatted output to stdout.  */
 549 extern int wprintf (__const wchar_t *__restrict __format, ...)
 550      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 551 /* Write formatted output of at most N characters to S.  */
 552 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 553                      __const wchar_t *__restrict __format, ...)
 554      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 555
 556 /* Write formatted output to S from argument list ARG.  */
 557 extern int vfwprintf (__FILE *__restrict __s,
 558                       __const wchar_t *__restrict __format,
 559                       __gnuc_va_list __arg)
 560      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 561 /* Write formatted output to stdout from argument list ARG.  */
 562 extern int vwprintf (__const wchar_t *__restrict __format,
 563                      __gnuc_va_list __arg)
 564      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 565 /* Write formatted output of at most N character to S from argument
 566    list ARG.  */
 567 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 568                       __const wchar_t *__restrict __format,
 569                       __gnuc_va_list __arg)
 570      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 571
 572
 573 /* Read formatted input from STREAM.  */
 574 extern int fwscanf (__FILE *__restrict __stream,
 575                     __const wchar_t *__restrict __format, ...)
 576      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 577 /* Read formatted input from stdin.  */
 578 extern int wscanf (__const wchar_t *__restrict __format, ...)
 579      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 580 /* Read formatted input from S.  */
 581 extern int swscanf (__const wchar_t *__restrict __s,
 582                     __const wchar_t *__restrict __format, ...)
 583      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 584 #endif /* Use ISO C99 and Unix98. */
 585
 586 #ifdef __USE_ISOC99
 587 /* Read formatted input from S into argument list ARG.  */
 588 extern int vfwscanf (__FILE *__restrict __s,
 589                      __const wchar_t *__restrict __format,
 590                      __gnuc_va_list __arg)
 591      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 592 /* Read formatted input from stdin into argument list ARG.  */
 593 extern int vwscanf (__const wchar_t *__restrict __format,
 594                     __gnuc_va_list __arg)
 595      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 596 /* Read formatted input from S into argument list ARG.  */
 597 extern int vswscanf (__const wchar_t *__restrict __s,
 598                      __const wchar_t *__restrict __format,
 599                      __gnuc_va_list __arg)
 600      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 601 #endif /* Use ISO C99. */
 602
 603
 604 /* Read a character from STREAM.  */
 605 extern wint_t fgetwc (__FILE *__stream) __THROW;
 606 extern wint_t getwc (__FILE *__stream) __THROW;
 607
 608 /* Read a character from stdin.  */
 609 extern wint_t getwchar (void) __THROW;
 610
 611
 612 /* Write a character to STREAM.  */
 613 extern wint_t fputwc (wchar_t __wc, __FILE *__stream) __THROW;
 614 extern wint_t putwc (wchar_t __wc, __FILE *__stream) __THROW;
 615
 616 /* Write a character to stdout.  */
 617 extern wint_t putwchar (wchar_t __wc) __THROW;
 618
 619
 620 /* Get a newline-terminated wide character string of finite length
 621    from STREAM.  */
 622 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 623                         __FILE *__restrict __stream) __THROW;
 624
 625 /* Write a string to STREAM.  */
 626 extern int fputws (__const wchar_t *__restrict __ws,
 627                    __FILE *__restrict __stream) __THROW;
 628
 629
 630 /* Push a character back onto the input buffer of STREAM.  */
 631 extern wint_t ungetwc (wint_t __wc, __FILE *__stream) __THROW;
 632
 633
 634 #ifdef __USE_GNU
 635 /* These are defined to be equivalent to the `char' functions defined
 636    in POSIX.1:1996.  */
 637 extern wint_t getwc_unlocked (__FILE *__stream) __THROW;
 638 extern wint_t getwchar_unlocked (void) __THROW;
 639
 640 /* This is the wide character version of a GNU extension.  */
 641 extern wint_t fgetwc_unlocked (__FILE *__stream) __THROW;
 642
 643 /* Faster version when locking is not necessary.  */
 644 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream) __THROW;
 645
 646 /* These are defined to be equivalent to the `char' functions defined
 647    in POSIX.1:1996.  */
 648 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream) __THROW;
 649 extern wint_t putwchar_unlocked (wchar_t __wc) __THROW;
 650
 651
 652 /* This function does the same as `fgetws' but does not lock the stream.  */
 653 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 654                                  __FILE *__restrict __stream) __THROW;
 655
 656 /* This function does the same as `fputws' but does not lock the stream.  */
 657 extern int fputws_unlocked (__const wchar_t *__restrict __ws,
 658                             __FILE *__restrict __stream) __THROW;
 659 #endif
 660
 661
 662 /* Format TP into S according to FORMAT.
 663    Write no more than MAXSIZE wide characters and return the number
 664    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 665 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 666                         __const wchar_t *__restrict __format,
 667                         __const struct tm *__restrict __tp) __THROW;
 668
 669 /* The X/Open standard demands that most of the functions defined in
 670    the <wctype.h> header must also appear here.  This is probably
 671    because some X/Open members wrote their implementation before the
 672    ISO C standard was published and introduced the better solution.
 673    We have to provide these definitions for compliance reasons but we
 674    do this nonsense only if really necessary.  */
 675 #if defined __USE_UNIX98 && !defined __USE_GNU
 676 # define __need_iswxxx
 677 # include <wctype.h>
 678 #endif
 679
 680 __END_DECLS
 681
 682 #endif  /* _WCHAR_H defined */
 683
 684 #endif /* wchar.h  */