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 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 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 funciton 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;
 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 #if defined __OPTIMIZE__ && !defined __OPTIMIZE_SIZE__ \
 288     && defined __USE_EXTERN_INLINES
 289 /* Define inline function as optimization.  */
 290 extern __inline size_t mbrlen (__const char *__restrict __s, size_t __n,
 291                                mbstate_t *__restrict __ps) __THROW
 292 { return (__ps != NULL
 293           ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 294 #endif
 295
 296 /* Write wide character representation of multibyte character string
 297    SRC to DST.  */
 298 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
 299                          __const char **__restrict __src, size_t __len,
 300                          mbstate_t *__restrict __ps) __THROW;
 301
 302 /* Write multibyte character representation of wide character string
 303    SRC to DST.  */
 304 extern size_t wcsrtombs (char *__restrict __dst,
 305                          __const wchar_t **__restrict __src, size_t __len,
 306                          mbstate_t *__restrict __ps) __THROW;
 307
 308
 309 #ifdef  __USE_GNU
 310 /* Write wide character representation of at most NMC bytes of the
 311    multibyte character string SRC to DST.  */
 312 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
 313                           __const char **__restrict __src, size_t __nmc,
 314                           size_t __len, mbstate_t *__restrict __ps) __THROW;
 315
 316 /* Write multibyte character representation of at most NWC characters
 317    from the wide character string SRC to DST.  */
 318 extern size_t wcsnrtombs (char *__restrict __dst,
 319                           __const wchar_t **__restrict __src,
 320                           size_t __nwc, size_t __len,
 321                           mbstate_t *__restrict __ps) __THROW;
 322 #endif  /* use GNU */
 323
 324
 325 /* The following functions are extensions found in X/Open CAE.  */
 326 #ifdef __USE_XOPEN
 327 /* Determine number of column positions required for C.  */
 328 extern int wcwidth (wint_t __c) __THROW;
 329
 330 /* Determine number of column positions required for first N wide
 331    characters (or fewer if S ends before this) in S.  */
 332 extern int wcswidth (__const wchar_t *__s, size_t __n) __THROW;
 333 #endif  /* Use X/Open.  */
 334
 335
 336 /* Convert initial portion of the wide string NPTR to `double'
 337    representation.  */
 338 extern double wcstod (__const wchar_t *__restrict __nptr,
 339                       wchar_t **__restrict __endptr) __THROW;
 340
 341 #ifdef __USE_ISOC99
 342 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 343 extern float wcstof (__const wchar_t *__restrict __nptr,
 344                      wchar_t **__restrict __endptr) __THROW;
 345 extern long double wcstold (__const wchar_t *__restrict __nptr,
 346                             wchar_t **__restrict __endptr) __THROW;
 347 #endif /* C99 */
 348
 349
 350 /* Convert initial portion of wide string NPTR to `long int'
 351    representation.  */
 352 extern long int wcstol (__const wchar_t *__restrict __nptr,
 353                         wchar_t **__restrict __endptr, int __base) __THROW;
 354
 355 /* Convert initial portion of wide string NPTR to `unsigned long int'
 356    representation.  */
 357 extern unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 358                                   wchar_t **__restrict __endptr, int __base)
 359      __THROW;
 360
 361 #if defined __GNUC__ && defined __USE_GNU
 362 /* Convert initial portion of wide string NPTR to `long int'
 363    representation.  */
 364 __extension__
 365 extern long long int wcstoq (__const wchar_t *__restrict __nptr,
 366                              wchar_t **__restrict __endptr, int __base)
 367      __THROW;
 368
 369 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 370    representation.  */
 371 __extension__
 372 extern unsigned long long int wcstouq (__const wchar_t *__restrict __nptr,
 373                                        wchar_t **__restrict __endptr,
 374                                        int __base) __THROW;
 375 #endif /* GCC and use GNU.  */
 376
 377 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
 378 /* Convert initial portion of wide string NPTR to `long int'
 379    representation.  */
 380 __extension__
 381 extern long long int wcstoll (__const wchar_t *__restrict __nptr,
 382                               wchar_t **__restrict __endptr, int __base)
 383      __THROW;
 384
 385 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 386    representation.  */
 387 __extension__
 388 extern unsigned long long int wcstoull (__const wchar_t *__restrict __nptr,
 389                                         wchar_t **__restrict __endptr,
 390                                         int __base) __THROW;
 391 #endif /* ISO C99 or GCC and GNU.  */
 392
 393 #ifdef __USE_GNU
 394 /* The concept of one static locale per category is not very well
 395    thought out.  Many applications will need to process its data using
 396    information from several different locales.  Another application is
 397    the implementation of the internationalization handling in the
 398    upcoming ISO C++ standard library.  To support this another set of
 399    the functions using locale data exist which have an additional
 400    argument.
 401
 402    Attention: all these functions are *not* standardized in any form.
 403    This is a proof-of-concept implementation.  */
 404
 405 /* Structure for reentrant locale using functions.  This is an
 406    (almost) opaque type for the user level programs.  */
 407 # include <xlocale.h>
 408
 409 /* Special versions of the functions above which take the locale to
 410    use as an additional parameter.  */
 411 extern long int __wcstol_l (__const wchar_t *__restrict __nptr,
 412                             wchar_t **__restrict __endptr, int __base,
 413                             __locale_t __loc) __THROW;
 414
 415 extern unsigned long int __wcstoul_l (__const wchar_t *__restrict __nptr,
 416                                       wchar_t **__restrict __endptr,
 417                                       int __base, __locale_t __loc) __THROW;
 418
 419 __extension__
 420 extern long long int __wcstoll_l (__const wchar_t *__restrict __nptr,
 421                                   wchar_t **__restrict __endptr,
 422                                   int __base, __locale_t __loc) __THROW;
 423
 424 __extension__
 425 extern unsigned long long int __wcstoull_l (__const wchar_t *__restrict __nptr,
 426                                             wchar_t **__restrict __endptr,
 427                                             int __base, __locale_t __loc)
 428      __THROW;
 429
 430 extern double __wcstod_l (__const wchar_t *__restrict __nptr,
 431                           wchar_t **__restrict __endptr, __locale_t __loc)
 432      __THROW;
 433
 434 extern float __wcstof_l (__const wchar_t *__restrict __nptr,
 435                          wchar_t **__restrict __endptr, __locale_t __loc)
 436      __THROW;
 437
 438 extern long double __wcstold_l (__const wchar_t *__restrict __nptr,
 439                                 wchar_t **__restrict __endptr,
 440                                 __locale_t __loc) __THROW;
 441 #endif /* GNU */
 442
 443
 444 /* The internal entry points for `wcstoX' take an extra flag argument
 445    saying whether or not to parse locale-dependent number grouping.  */
 446 extern double __wcstod_internal (__const wchar_t *__restrict __nptr,
 447                                  wchar_t **__restrict __endptr, int __group)
 448      __THROW;
 449 extern float __wcstof_internal (__const wchar_t *__restrict __nptr,
 450                                 wchar_t **__restrict __endptr, int __group)
 451      __THROW;
 452 extern long double __wcstold_internal (__const wchar_t *__restrict __nptr,
 453                                        wchar_t **__restrict __endptr,
 454                                        int __group) __THROW;
 455
 456 #ifndef __wcstol_internal_defined
 457 extern long int __wcstol_internal (__const wchar_t *__restrict __nptr,
 458                                    wchar_t **__restrict __endptr,
 459                                    int __base, int __group) __THROW;
 460 # define __wcstol_internal_defined      1
 461 #endif
 462 #ifndef __wcstoul_internal_defined
 463 extern unsigned long int __wcstoul_internal (__const wchar_t *__restrict __npt,
 464                                              wchar_t **__restrict __endptr,
 465                                              int __base, int __group) __THROW;
 466 # define __wcstoul_internal_defined     1
 467 #endif
 468 #ifndef __wcstoll_internal_defined
 469 __extension__
 470 extern long long int __wcstoll_internal (__const wchar_t *__restrict __nptr,
 471                                          wchar_t **__restrict __endptr,
 472                                          int __base, int __group) __THROW;
 473 # define __wcstoll_internal_defined     1
 474 #endif
 475 #ifndef __wcstoull_internal_defined
 476 __extension__
 477 extern unsigned long long int __wcstoull_internal (__const wchar_t *
 478                                                    __restrict __nptr,
 479                                                    wchar_t **
 480                                                    __restrict __endptr,
 481                                                    int __base,
 482                                                    int __group) __THROW;
 483 # define __wcstoull_internal_defined    1
 484 #endif
 485
 486
 487 #if defined __OPTIMIZE__ && __GNUC__ >= 2
 488 /* Define inline functions which call the internal entry points.  */
 489
 490 extern __inline double wcstod (__const wchar_t *__restrict __nptr,
 491                                wchar_t **__restrict __endptr) __THROW
 492 { return __wcstod_internal (__nptr, __endptr, 0); }
 493 extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
 494                                  wchar_t **__restrict __endptr,
 495                                  int __base) __THROW
 496 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 497 extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 498                                            wchar_t **__restrict __endptr,
 499                                            int __base) __THROW
 500 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 501
 502 # ifdef __USE_GNU
 503 extern __inline float wcstof (__const wchar_t *__restrict __nptr,
 504                               wchar_t **__restrict __endptr) __THROW
 505 { return __wcstof_internal (__nptr, __endptr, 0); }
 506 extern __inline long double wcstold (__const wchar_t *__restrict __nptr,
 507                                      wchar_t **__restrict __endptr) __THROW
 508 { return __wcstold_internal (__nptr, __endptr, 0); }
 509
 510
 511 __extension__
 512 extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
 513                                       wchar_t **__restrict __endptr,
 514                                       int __base) __THROW
 515 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
 516 __extension__
 517 extern __inline unsigned long long int wcstouq (__const wchar_t *
 518                                                 __restrict __nptr,
 519                                                 wchar_t **__restrict __endptr,
 520                                                 int __base) __THROW
 521 { return __wcstoull_internal (__nptr, __endptr, __base, 0); }
 522 # endif /* Use GNU.  */
 523 #endif /* Optimizing GCC >=2.  */
 524
 525
 526 #ifdef  __USE_GNU
 527 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 528    DEST.  */
 529 extern wchar_t *wcpcpy (wchar_t *__dest, __const wchar_t *__src) __THROW;
 530
 531 /* Copy no more than N characters of SRC to DEST, returning the address of
 532    the last character written into DEST.  */
 533 extern wchar_t *wcpncpy (wchar_t *__dest, __const wchar_t *__src, size_t __n)
 534      __THROW;
 535 #endif  /* use GNU */
 536
 537
 538 /* Wide character I/O functions.  */
 539 #if defined __USE_ISOC99 || defined __USE_UNIX98
 540
 541 /* Select orientation for stream.  */
 542 extern int fwide (__FILE *__fp, int __mode) __THROW;
 543
 544
 545 /* Write formatted output to STREAM.  */
 546 extern int fwprintf (__FILE *__restrict __stream,
 547                      __const wchar_t *__restrict __format, ...)
 548      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
 549 /* Write formatted output to stdout.  */
 550 extern int wprintf (__const wchar_t *__restrict __format, ...)
 551      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
 552 /* Write formatted output of at most N characters to S.  */
 553 extern int swprintf (wchar_t *__restrict __s, size_t __n,
 554                      __const wchar_t *__restrict __format, ...)
 555      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
 556
 557 /* Write formatted output to S from argument list ARG.  */
 558 extern int vfwprintf (__FILE *__restrict __s,
 559                       __const wchar_t *__restrict __format,
 560                       __gnuc_va_list __arg)
 561      __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
 562 /* Write formatted output to stdout from argument list ARG.  */
 563 extern int vwprintf (__const wchar_t *__restrict __format,
 564                      __gnuc_va_list __arg)
 565      __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
 566 /* Write formatted output of at most N character to S from argument
 567    list ARG.  */
 568 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
 569                       __const wchar_t *__restrict __format,
 570                       __gnuc_va_list __arg)
 571      __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
 572
 573
 574 /* Read formatted input from STREAM.  */
 575 extern int fwscanf (__FILE *__restrict __stream,
 576                     __const wchar_t *__restrict __format, ...)
 577      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 578 /* Read formatted input from stdin.  */
 579 extern int wscanf (__const wchar_t *__restrict __format, ...)
 580      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
 581 /* Read formatted input from S.  */
 582 extern int swscanf (__const wchar_t *__restrict __s,
 583                     __const wchar_t *__restrict __format, ...)
 584      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
 585 #endif /* Use ISO C99 and Unix98. */
 586
 587 #ifdef __USE_ISOC99
 588 /* Read formatted input from S into argument list ARG.  */
 589 extern int vfwscanf (__FILE *__restrict __s,
 590                      __const wchar_t *__restrict __format,
 591                      __gnuc_va_list __arg)
 592      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 593 /* Read formatted input from stdin into argument list ARG.  */
 594 extern int vwscanf (__const wchar_t *__restrict __format,
 595                     __gnuc_va_list __arg)
 596      __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
 597 /* Read formatted input from S into argument list ARG.  */
 598 extern int vswscanf (__const wchar_t *__restrict __s,
 599                      __const wchar_t *__restrict __format,
 600                      __gnuc_va_list __arg)
 601      __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
 602 #endif /* Use ISO C99. */
 603
 604
 605 /* Read a character from STREAM.  */
 606 extern wint_t fgetwc (__FILE *__stream);
 607 extern wint_t getwc (__FILE *__stream);
 608
 609 /* Read a character from stdin.  */
 610 extern wint_t getwchar (void);
 611
 612
 613 /* Write a character to STREAM.  */
 614 extern wint_t fputwc (wchar_t __wc, __FILE *__stream);
 615 extern wint_t putwc (wchar_t __wc, __FILE *__stream);
 616
 617 /* Write a character to stdout.  */
 618 extern wint_t putwchar (wchar_t __wc);
 619
 620
 621 /* Get a newline-terminated wide character string of finite length
 622    from STREAM.  */
 623 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
 624                         __FILE *__restrict __stream);
 625
 626 /* Write a string to STREAM.  */
 627 extern int fputws (__const wchar_t *__restrict __ws,
 628                    __FILE *__restrict __stream);
 629
 630
 631 /* Push a character back onto the input buffer of STREAM.  */
 632 extern wint_t ungetwc (wint_t __wc, __FILE *__stream);
 633
 634
 635 #ifdef __USE_GNU
 636 /* These are defined to be equivalent to the `char' functions defined
 637    in POSIX.1:1996.  */
 638 extern wint_t getwc_unlocked (__FILE *__stream);
 639 extern wint_t getwchar_unlocked (void);
 640
 641 /* This is the wide character version of a GNU extension.  */
 642 extern wint_t fgetwc_unlocked (__FILE *__stream);
 643
 644 /* Faster version when locking is not necessary.  */
 645 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream);
 646
 647 /* These are defined to be equivalent to the `char' functions defined
 648    in POSIX.1:1996.  */
 649 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream);
 650 extern wint_t putwchar_unlocked (wchar_t __wc);
 651
 652
 653 /* This function does the same as `fgetws' but does not lock the stream.  */
 654 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
 655                                  __FILE *__restrict __stream);
 656
 657 /* This function does the same as `fputws' but does not lock the stream.  */
 658 extern int fputws_unlocked (__const wchar_t *__restrict __ws,
 659                             __FILE *__restrict __stream);
 660 #endif
 661
 662
 663 /* Format TP into S according to FORMAT.
 664    Write no more than MAXSIZE wide characters and return the number
 665    of wide characters written, or 0 if it would exceed MAXSIZE.  */
 666 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
 667                         __const wchar_t *__restrict __format,
 668                         __const struct tm *__restrict __tp);
 669
 670 /* The X/Open standard demands that most of the functions defined in
 671    the <wctype.h> header must also appear here.  This is probably
 672    because some X/Open members wrote their implementation before the
 673    ISO C standard was published and introduced the better solution.
 674    We have to provide these definitions for compliance reasons but we
 675    do this nonsense only if really necessary.  */
 676 #if defined __USE_UNIX98 && !defined __USE_GNU
 677 # define __need_iswxxx
 678 # include <wctype.h>
 679 #endif
 680
 681 __END_DECLS
 682
 683 #endif  /* _WCHAR_H defined */
 684
 685 #endif /* wchar.h  */