wcsmbs/wchar.h

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