wcsmbs/wchar.h

   1 /* Copyright (C) 1995, 1996, 1997, 1998, 1999 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      ISO C Standard, Amendment 1, 7.16.4
  21  *      General wide-string 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 # include <stdio.h>
  35 /* Get va_list definition.  */
  36 # define __need___va_list
  37 # include <stdarg.h>
  38
  39 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  40 # define __need_size_t
  41 # define __need_wchar_t
  42 # define __need_NULL
  43 #endif
  44 #define __need_wint_t
  45 #include <stddef.h>
  46
  47 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  48    there.  So define it ourselves if it remains undefined.  */
  49 #ifndef _WINT_T
  50 /* Integral type unchanged by default argument promotions that can
  51    hold any value corresponding to members of the extended character
  52    set, as well as at least one value that does not correspond to any
  53    member of the extended character set.  */
  54 # define _WINT_T
  55 typedef unsigned int wint_t;
  56 #endif
  57
  58
  59 #ifndef __mbstate_t_defined
  60 # define __mbstate_t_defined    1
  61 /* Conversion state information.  */
  62 typedef struct
  63 {
  64   int count;            /* Number of bytes needed for the current character. */
  65   wint_t value;         /* Value so far.  */
  66 } __mbstate_t;
  67 #endif
  68 #undef __need_mbstate_t
  69
  70
  71 /* The rest of the file is only used if used if __need_mbstate_t is not
  72    defined.  */
  73 #ifdef _WCHAR_H
  74
  75 /* Public type.  */
  76 typedef __mbstate_t mbstate_t;
  77
  78 #ifndef WCHAR_MIN
  79 /* These constants might also be defined in <inttypes.h>.  */
  80 # define WCHAR_MIN (0)
  81 # define WCHAR_MAX (0x7fffffff)
  82 #endif
  83
  84 #ifndef WEOF
  85 # define WEOF (0xffffffffu)
  86 #endif
  87
  88 /* For XPG4 compliance we have to define the stuff from <wctype.h> here
  89    as well.  */
  90 #if defined __USE_XOPEN && !defined __USE_UNIX98
  91 # include <wctype.h>
  92 #endif
  93
  94 /* This incomplete type is defined in <time.h> but needed here because
  95    of `wcsftime'.  */
  96 struct tm;
  97
  98
  99 __BEGIN_DECLS
 100
 101 /* Copy SRC to DEST.  */
 102 extern wchar_t *wcscpy (wchar_t *__restrict __dest,
 103                         __const wchar_t *__restrict __src) __THROW;
 104 /* Copy no more than N wide-characters of SRC to DEST.  */
 105 extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
 106                          __const wchar_t *__restrict __src, size_t __n)
 107      __THROW;
 108
 109 /* Append SRC onto DEST.  */
 110 extern wchar_t *wcscat (wchar_t *__restrict __dest,
 111                         __const wchar_t *__restrict __src) __THROW;
 112 /* Append no more than N wide-characters of SRC onto DEST.  */
 113 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
 114                          __const wchar_t *__restrict __src, size_t __n)
 115      __THROW;
 116
 117 /* Compare S1 and S2.  */
 118 extern int wcscmp (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 119 /* Compare N wide-characters of S1 and S2.  */
 120 extern int wcsncmp (__const wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 121      __THROW;
 122
 123 #ifdef __USE_GNU
 124 /* Compare S1 and S2, ignoring case.  */
 125 extern int wcscasecmp (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 126
 127 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 128 extern int wcsncasecmp (__const wchar_t *__s1, __const wchar_t *__s2,
 129                         size_t __n) __THROW;
 130
 131 /* Similar to the two functions above but take the information from
 132    the provided locale and not the global locale.  */
 133 # include <xlocale.h>
 134
 135 extern int __wcscasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 136                            __locale_t __loc) __THROW;
 137
 138 extern int __wcsncasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
 139                             size_t __n, __locale_t __loc) __THROW;
 140 #endif
 141
 142 /* Compare S1 and S2, both interpreted as appropriate to the
 143    LC_COLLATE category of the current locale.  */
 144 extern int wcscoll (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
 145 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 146    applied to two transformed strings the result is the as applying
 147    `wcscoll' to the original strings.  */
 148 extern size_t wcsxfrm (wchar_t *__restrict __s1,
 149                        __const wchar_t *__restrict __s2, size_t __n) __THROW;
 150
 151 #ifdef __USE_GNU
 152 /* Similar to the two functions above but take the information from
 153    the provided locale and not the global locale.  */
 154
 155 /* Compare S1 and S2, both interpreted as appropriate to the
 156    LC_COLLATE category of the given locale.  */
 157 extern int __wcscoll_l (__const wchar_t *__s1, __const wchar_t *__s2,
 158                         __locale_t __loc) __THROW;
 159 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 160    applied to two transformed strings the result is the as applying
 161    `wcscoll' to the original strings.  */
 162 extern size_t __wcsxfrm_l (wchar_t *__s1, __const wchar_t *__s2,
 163                            size_t __n, __locale_t __loc) __THROW;
 164
 165 /* Duplicate S, returning an identical malloc'd string.  */
 166 extern wchar_t *wcsdup (__const wchar_t *__s) __THROW;
 167 #endif
 168
 169 /* Find the first occurrence of WC in WCS.  */
 170 extern wchar_t *wcschr (__const wchar_t *__wcs, wchar_t __wc) __THROW;
 171 /* Find the last occurrence of WC in WCS.  */
 172 extern wchar_t *wcsrchr (__const wchar_t *__wcs, wchar_t __wc) __THROW;
 173
 174 #ifdef __USE_GNU
 175 /* This funciton is similar to `wcschr'.  But it returns a pointer to
 176    the closing NUL wide character in case C is not found in S.  */
 177 extern wchar_t *wcschrnul (__const wchar_t *__s, wchar_t __wc) __THROW;
 178 #endif
 179
 180 /* Return the length of the initial segmet of WCS which
 181    consists entirely of wide characters not in REJECT.  */
 182 extern size_t wcscspn (__const wchar_t *__wcs, __const wchar_t *__reject)
 183      __THROW;
 184 /* Return the length of the initial segmet of WCS which
 185    consists entirely of wide characters in  ACCEPT.  */
 186 extern size_t wcsspn (__const wchar_t *__wcs, __const wchar_t *__accept)
 187      __THROW;
 188 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 189 extern wchar_t *wcspbrk (__const wchar_t *__wcs, __const wchar_t *__accept)
 190      __THROW;
 191 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 192 extern wchar_t *wcsstr (__const wchar_t *__haystack, __const wchar_t *__needle)
 193      __THROW;
 194
 195 #if defined __USE_XOPEN && !defined __USE_UNIX98
 196 /* Another name for `wcsstr' from XPG4.  */
 197 extern wchar_t *wcswcs (__const wchar_t *__haystack, __const wchar_t *__needle)
 198      __THROW;
 199 #endif
 200
 201 /* Divide WCS into tokens separated by characters in DELIM.  */
 202 extern wchar_t *wcstok (wchar_t *__restrict __s,
 203                         __const wchar_t *__restrict __delim,
 204                         wchar_t **__restrict __ptr) __THROW;
 205
 206 /* Return the number of wide characters in S.  */
 207 extern size_t __wcslen (__const wchar_t *__s) __THROW;
 208 extern size_t wcslen (__const wchar_t *__s) __THROW;
 209
 210 #ifdef __USE_GNU
 211 /* Return the number of wide characters in S, but at most MAXLEN.  */
 212 extern size_t wcsnlen (__const wchar_t *__s, size_t __maxlen) __THROW;
 213 #endif
 214
 215
 216 /* Search N wide characters of S for C.  */
 217 extern wchar_t *wmemchr (__const wchar_t *__s, wchar_t __c, size_t __n)
 218      __THROW;
 219
 220 /* Compare N wide characters of S1 and S2.  */
 221 extern int wmemcmp (__const wchar_t *__restrict __s1,
 222                     __const wchar_t *__restrict __s2, size_t __n) __THROW;
 223
 224 /* Copy N wide characters of SRC to DEST.  */
 225 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
 226                          __const wchar_t *__restrict __s2, size_t __n) __THROW;
 227
 228 /* Copy N wide characters of SRC to DEST, guaranteeing
 229    correct behavior for overlapping strings.  */
 230 extern wchar_t *wmemmove (wchar_t *__s1, __const wchar_t *__s2, size_t __n)
 231      __THROW;
 232
 233 /* Set N wide characters of S to C.  */
 234 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
 235
 236 #ifdef __USE_GNU
 237 /* Copy N wide characters of SRC to DEST and return pointer to following
 238    wide character.  */
 239 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
 240                           __const wchar_t *__restrict __s2, size_t __n)
 241      __THROW;
 242 #endif
 243
 244
 245 /* Determine whether C constitutes a valid (one-byte) multibyte
 246    character.  */
 247 extern wint_t btowc (int __c) __THROW;
 248
 249 /* Determine whether C corresponds to a member of the extended
 250    character set whose multibyte representation is a single byte.  */
 251 extern int wctob (wint_t __c) __THROW;
 252
 253 /* Determine whether PS points to an object representing the initial
 254    state.  */
 255 extern int mbsinit (__const mbstate_t *__ps) __THROW;
 256
 257 /* Write wide character representation of multibyte character pointed
 258    to by S to PWC.  */
 259 extern size_t mbrtowc (wchar_t *__restrict __pwc,
 260                        __const char *__restrict __s, size_t __n,
 261                        mbstate_t *__p) __THROW;
 262
 263 /* Write multibyte representation of wide character WC to S.  */
 264 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
 265                        mbstate_t *__restrict __ps) __THROW;
 266
 267 /* Return number of bytes in multibyte character pointed to by S.  */
 268 extern size_t __mbrlen (__const char *__restrict __s, size_t __n,
 269                         mbstate_t *__restrict __ps) __THROW;
 270 extern size_t mbrlen (__const char *__restrict __s, size_t __n,
 271                       mbstate_t *__restrict __ps) __THROW;
 272
 273 #if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
 274     && defined __USE_EXTERN_INLINES
 275 /* Define inline function as optimization.  */
 276 extern __inline size_t mbrlen (__const char *__restrict __s, size_t __n,
 277                                mbstate_t *__restrict __ps) __THROW
 278 { return (__ps != NULL
 279           ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 280 #endif
 281
 282 /* Write wide character representation of multibyte character string
 283    SRC to DST.  */
 284 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 285                          __const char **__restrict __src, size_t __len,
 286                          mbstate_t *__restrict __ps) __THROW;
 287
 288 /* Write multibyte character representation of wide character string
 289    SRC to DST.  */
 290 extern size_t wcsrtombs (char *__restrict __dst,
 291                          __const wchar_t **__restrict __src, size_t __len,
 292                          mbstate_t *__restrict __ps) __THROW;
 293
 294
 295 #ifdef  __USE_GNU
 296 /* Write wide character representation of at most NMC bytes of the
 297    multibyte character string SRC to DST.  */
 298 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 299                           __const char **__restrict __src, size_t __nmc,
 300                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 301
 302 /* Write multibyte character representation of at most NWC characters
 303    from the wide character string SRC to DST.  */
 304 extern size_t wcsnrtombs (char *__restrict __dst,
 305                           __const wchar_t **__restrict __src,
 306                           size_t __nwc, size_t __len,
 307                           mbstate_t *__restrict __ps) __THROW;
 308 #endif  /* use GNU */
 309
 310
 311 /* The following functions are extensions found in X/Open CAE.  */
 312 #ifdef __USE_XOPEN
 313 /* Determine number of column positions required for C.  */
 314 extern int wcwidth (wint_t __c) __THROW;
 315
 316 /* Determine number of column positions required for first N wide
 317    characters (or fewer if S ends before this) in S.  */
 318 extern int wcswidth (__const wchar_t *__s, size_t __n) __THROW;
 319 #endif  /* Use X/Open.  */
 320
 321
 322 /* Convert initial portion of the wide string NPTR to `double'
 323    representation.  */
 324 extern double wcstod (__const wchar_t *__restrict __nptr,
 325                       wchar_t **__restrict __endptr) __THROW;
 326
 327 #ifdef __USE_ISOC99
 328 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 329 extern float wcstof (__const wchar_t *__restrict __nptr,
 330                      wchar_t **__restrict __endptr) __THROW;
 331 extern long double wcstold (__const wchar_t *__restrict __nptr,
 332                             wchar_t **__restrict __endptr) __THROW;
 333 #endif /* C9x */
 334
 335
 336 /* Convert initial portion of wide string NPTR to `long int'
 337    representation.  */
 338 extern long int wcstol (__const wchar_t *__restrict __nptr,
 339                         wchar_t **__restrict __endptr, int __base) __THROW;
 340
 341 /* Convert initial portion of wide string NPTR to `unsigned long int'
 342    representation.  */
 343 extern unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 344                                   wchar_t **__restrict __endptr, int __base)
 345      __THROW;
 346
 347 #if defined __GNUC__ && defined __USE_GNU
 348 /* Convert initial portion of wide string NPTR to `long int'
 349    representation.  */
 350 __extension__
 351 extern long long int wcstoq (__const wchar_t *__restrict __nptr,
 352                              wchar_t **__restrict __endptr, int __base)
 353      __THROW;
 354
 355 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 356    representation.  */
 357 __extension__
 358 extern unsigned long long int wcstouq (__const wchar_t *__restrict __nptr,
 359                                        wchar_t **__restrict __endptr,
 360                                        int __base) __THROW;
 361 #endif /* GCC and use GNU.  */
 362
 363 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
 364 /* Convert initial portion of wide string NPTR to `long int'
 365    representation.  */
 366 __extension__
 367 extern long long int wcstoll (__const wchar_t *__restrict __nptr,
 368                               wchar_t **__restrict __endptr, int __base)
 369      __THROW;
 370
 371 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 372    representation.  */
 373 __extension__
 374 extern unsigned long long int wcstoull (__const wchar_t *__restrict __nptr,
 375                                         wchar_t **__restrict __endptr,
 376                                         int __base) __THROW;
 377 #endif /* ISO C99 or GCC and GNU.  */
 378
 379 #ifdef __USE_GNU
 380 /* The concept of one static locale per category is not very well
 381    thought out.  Many applications will need to process its data using
 382    information from several different locales.  Another application is
 383    the implementation of the internationalization handling in the
 384    upcoming ISO C++ standard library.  To support this another set of
 385    the functions using locale data exist which have an additional
 386    argument.
 387
 388    Attention: all these functions are *not* standardized in any form.
 389    This is a proof-of-concept implementation.  */
 390
 391 /* Structure for reentrant locale using functions.  This is an
 392    (almost) opaque type for the user level programs.  */
 393 # include <xlocale.h>
 394
 395 /* Special versions of the functions above which take the locale to
 396    use as an additional parameter.  */
 397 extern long int __wcstol_l (__const wchar_t *__restrict __nptr,
 398                             wchar_t **__restrict __endptr, int __base,
 399                             __locale_t __loc) __THROW;
 400
 401 extern unsigned long int __wcstoul_l (__const wchar_t *__restrict __nptr,
 402                                       wchar_t **__restrict __endptr,
 403                                       int __base, __locale_t __loc) __THROW;
 404
 405 __extension__
 406 extern long long int __wcstoll_l (__const wchar_t *__restrict __nptr,
 407                                   wchar_t **__restrict __endptr,
 408                                   int __base, __locale_t __loc) __THROW;
 409
 410 __extension__
 411 extern unsigned long long int __wcstoull_l (__const wchar_t *__restrict __nptr,
 412                                             wchar_t **__restrict __endptr,
 413                                             int __base, __locale_t __loc)
 414      __THROW;
 415
 416 extern double __wcstod_l (__const wchar_t *__restrict __nptr,
 417                           wchar_t **__restrict __endptr, __locale_t __loc)
 418      __THROW;
 419
 420 extern float __wcstof_l (__const wchar_t *__restrict __nptr,
 421                          wchar_t **__restrict __endptr, __locale_t __loc)
 422      __THROW;
 423
 424 extern long double __wcstold_l (__const wchar_t *__restrict __nptr,
 425                                 wchar_t **__restrict __endptr,
 426                                 __locale_t __loc) __THROW;
 427 #endif /* GNU */
 428
 429
 430 /* The internal entry points for `wcstoX' take an extra flag argument
 431    saying whether or not to parse locale-dependent number grouping.  */
 432 extern double __wcstod_internal (__const wchar_t *__restrict __nptr,
 433                                  wchar_t **__restrict __endptr, int __group)
 434      __THROW;
 435 extern float __wcstof_internal (__const wchar_t *__restrict __nptr,
 436                                 wchar_t **__restrict __endptr, int __group)
 437      __THROW;
 438 extern long double __wcstold_internal (__const wchar_t *__restrict __nptr,
 439                                        wchar_t **__restrict __endptr,
 440                                        int __group) __THROW;
 441
 442 #ifndef __wcstol_internal_defined
 443 extern long int __wcstol_internal (__const wchar_t *__restrict __nptr,
 444                                    wchar_t **__restrict __endptr,
 445                                    int __base, int __group) __THROW;
 446 # define __wcstol_internal_defined      1
 447 #endif
 448 #ifndef __wcstoul_internal_defined
 449 extern unsigned long int __wcstoul_internal (__const wchar_t *__restrict __npt,
 450                                              wchar_t **__restrict __endptr,
 451                                              int __base, int __group) __THROW;
 452 # define __wcstoul_internal_defined     1
 453 #endif
 454 #ifndef __wcstoll_internal_defined
 455 __extension__
 456 extern long long int __wcstoll_internal (__const wchar_t *__restrict __nptr,
 457                                          wchar_t **__restrict __endptr,
 458                                          int __base, int __group) __THROW;
 459 # define __wcstoll_internal_defined     1
 460 #endif
 461 #ifndef __wcstoull_internal_defined
 462 __extension__
 463 extern unsigned long long int __wcstoull_internal (__const wchar_t *
 464                                                    __restrict __nptr,
 465                                                    wchar_t **
 466                                                    __restrict __endptr,
 467                                                    int __base,
 468                                                    int __group) __THROW;
 469 # define __wcstoull_internal_defined    1
 470 #endif
 471
 472
 473 #if defined __OPTIMIZE__ && __GNUC__ >= 2
 474 /* Define inline functions which call the internal entry points.  */
 475
 476 extern __inline double wcstod (__const wchar_t *__restrict __nptr,
 477                                wchar_t **__restrict __endptr) __THROW
 478 { return __wcstod_internal (__nptr, __endptr, 0); }
 479 extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
 480                                  wchar_t **__restrict __endptr,
 481                                  int __base) __THROW
 482 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 483 extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 484                                            wchar_t **__restrict __endptr,
 485                                            int __base) __THROW
 486 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 487
 488 # ifdef __USE_GNU
 489 extern __inline float wcstof (__const wchar_t *__restrict __nptr,
 490                               wchar_t **__restrict __endptr) __THROW
 491 { return __wcstof_internal (__nptr, __endptr, 0); }
 492 extern __inline long double wcstold (__const wchar_t *__restrict __nptr,
 493                                      wchar_t **__restrict __endptr) __THROW
 494 { return __wcstold_internal (__nptr, __endptr, 0); }
 495
 496
 497 __extension__
 498 extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
 499                                       wchar_t **__restrict __endptr,
 500                                       int __base) __THROW
 501 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
 502 __extension__
 503 extern __inline unsigned long long int wcstouq (__const wchar_t *
 504                                                 __restrict __nptr,
 505                                                 wchar_t **__restrict __endptr,
 506                                                 int __base) __THROW
 507 { return __wcstoull_internal (__nptr, __endptr, __base, 0); }
 508 # endif /* Use GNU.  */
 509 #endif /* Optimizing GCC >=2.  */
 510
 511
 512 #ifdef  __USE_GNU
 513 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 514    DEST.  */
 515 extern wchar_t *wcpcpy (wchar_t *__dest, __const wchar_t *__src) __THROW;
 516
 517 /* Copy no more than N characters of SRC to DEST, returning the address of
 518    the last character written into DEST.  */
 519 extern wchar_t *wcpncpy (wchar_t *__dest, __const wchar_t *__src, size_t __n)
 520      __THROW;
 521 #endif  /* use GNU */
 522
 523
 524 /* Wide character I/O functions.  */
 525 #ifdef __USE_ISOC99
 526
 527 /* Select orientation for stream.  */
 528 extern int fwide (FILE *__fp, int __mode) __THROW;
 529
 530
 531 /* Write formatted output to STREAM.  */
 532 extern int fwprintf (FILE *__restrict __stream,
 533                      __const wchar_t *__restrict __format, ...)
 534      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 535 /* Write formatted output to stdout.  */
 536 extern int wprintf (__const wchar_t *__restrict __format, ...)
 537      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 538 /* Write formatted output of at most N characters to S.  */
 539 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 540                      __const wchar_t *__restrict __format, ...)
 541      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 542
 543 /* Write formatted output to S from argument list ARG.  */
 544 extern int vfwprintf (FILE *__restrict __s,
 545                       __const wchar_t *__restrict __format,
 546                       __gnuc_va_list __arg)
 547      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 548 /* Write formatted output to stdout from argument list ARG.  */
 549 extern int vwprintf (__const wchar_t *__restrict __format,
 550                      __gnuc_va_list __arg)
 551      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 552 /* Write formatted output of at most N character to S from argument
 553    list ARG.  */
 554 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 555                       __const wchar_t *__restrict __format,
 556                       __gnuc_va_list __arg)
 557      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 558
 559
 560 /* Read formatted input from STREAM.  */
 561 extern int fwscanf (FILE *__restrict __stream,
 562                     __const wchar_t *__restrict __format, ...)
 563      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 564 /* Read formatted input from stdin.  */
 565 extern int wscanf (__const wchar_t *__restrict __format, ...)
 566      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 567 /* Read formatted input from S.  */
 568 extern int swscanf (__const wchar_t *__restrict __s,
 569                     __const wchar_t *__restrict __format, ...)
 570      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 571
 572 /* Read formatted input from S into argument list ARG.  */
 573 extern int vfwscanf (FILE *__restrict __s,
 574                      __const wchar_t *__restrict __format,
 575                      __gnuc_va_list __arg)
 576      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 577 /* Read formatted input from stdin into argument list ARG.  */
 578 extern int vwscanf (__const wchar_t *__restrict __format,
 579                     __gnuc_va_list __arg)
 580      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 581 /* Read formatted input from S into argument list ARG.  */
 582 extern int vswscanf (__const wchar_t *__restrict __s,
 583                      __const wchar_t *__restrict __format,
 584                      __gnuc_va_list __arg)
 585      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 586
 587
 588 /* Read a character from STREAM.  */
 589 extern wint_t fgetwc (FILE *__stream);
 590 extern wint_t getwc (FILE *__stream);
 591
 592 /* Read a character from stdin.  */
 593 extern wint_t getwchar (void);
 594
 595 #ifdef __USE_GNU
 596 /* These are defined to be equivalent to the `char' functions defined
 597    in POSIX.1:1996.  */
 598 extern wint_t getwc_unlocked (FILE *__stream);
 599 extern wint_t getwchar_unlocked (void);
 600
 601 /* This is the wide character version of a GNU extension.  */
 602 extern wint_t fgetwc_unlocked (FILE *__stream);
 603 #endif /* Use POSIX or MISC.  */
 604
 605
 606 /* Write a character to STREAM.  */
 607 extern wint_t fputwc (wchar_t __wc, FILE *__stream);
 608 extern wint_t putwc (wchar_t __wc, FILE *__stream);
 609
 610 /* Write a character to stdout.  */
 611 extern wint_t putwchar (wchar_t __wc);
 612
 613 #ifdef __USE_GNU
 614 /* Faster version when locking is not necessary.  */
 615 extern wint_t fputwc_unlocked (wchar_t __wc, FILE *__stream);
 616
 617 /* These are defined to be equivalent to the `char' functions defined
 618    in POSIX.1:1996.  */
 619 extern wint_t putwc_unlocked (wchar_t __wc, FILE *__stream);
 620 extern wint_t putwchar_unlocked (wchar_t __wc);
 621 #endif
 622
 623
 624 /* Get a newline-terminated wide character string of finite length
 625    from STREAM.  */
 626 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 627                         FILE *__restrict __stream);
 628
 629 #ifdef __USE_GNU
 630 /* This function does the same as `fgetws' but does not lock the stream.  */
 631 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 632                                  FILE *__restrict __stream);
 633 #endif
 634
 635
 636 /* Write a string to STREAM.  */
 637 extern int fputws (__const wchar_t *__restrict __ws,
 638                    FILE *__restrict __stream);
 639
 640 #ifdef __USE_GNU
 641 /* This function does the same as `fputws' but does not lock the stream.  */
 642 extern int fputws_unlocked (__const wchar_t *__restrict __ws,
 643                             FILE *__restrict __stream);
 644 #endif
 645
 646
 647 /* Push a character back onto the input buffer of STREAM.  */
 648 extern wint_t ungetwc (wint_t __wc, FILE *__stream);
 649
 650
 651 /* Format TP into S according to FORMAT.
 652    Write no more than MAXSIZE wide characters and return the number
 653    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 654 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 655                         __const wchar_t *__restrict __format,
 656                         __const struct tm *__restrict __tp);
 657 #endif /* Use ISO C9x. */
 658
 659 /* The X/Open standard demands that most of the functions defined in
 660    the <wctype.h> header must also appear here.  This is probably
 661    because some X/Open members wrote their implementation before the
 662    ISO C standard was published and introduced the better solution.
 663    We have to provide these definitions for compliance reasons but we
 664    do this nonsense only if really necessary.  */
 665 #if defined __USE_UNIX98 && !defined __USE_GNU
 666 # define __need_iswxxx
 667 # include <wctype.h>
 668 #endif
 669
 670 __END_DECLS
 671
 672 #endif  /* _WCHAR_H defined */
 673
 674 #endif /* wchar.h  */