1 /* Copyright (C) 1995-1999, 2000, 2001 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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
20 * ISO C99 Standard: 7.24
21 * Extended multibyte and wide character utilities <wchar.h>
26 #ifndef __need_mbstate_t
28 # include <features.h>
31 #ifndef __UCLIBC_HAS_WCHAR__
32 #error Attempted to include wchar.h when uClibc built without wide char support.
36 /* Get FILE definition. */
37 # define __need___FILE
42 /* Get va_list definition. */
43 # define __need___va_list
46 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>. */
47 # define __need_size_t
48 # define __need_wchar_t
54 #include <bits/wchar.h>
56 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
57 there. So define it ourselves if it remains undefined. */
59 /* Integral type unchanged by default argument promotions that can
60 hold any value corresponding to members of the extended character
61 set, as well as at least one value that does not correspond to any
62 member of the extended character set. */
64 typedef unsigned int wint_t;
68 #ifndef __mbstate_t_defined
69 # define __mbstate_t_defined 1
70 /* Conversion state information. */
85 } __value; /* Value so far. */
89 #undef __need_mbstate_t
92 /* The rest of the file is only used if used if __need_mbstate_t is not
97 typedef __mbstate_t mbstate_t;
100 /* These constants might also be defined in <inttypes.h>. */
101 # define WCHAR_MIN __WCHAR_MIN
102 # define WCHAR_MAX __WCHAR_MAX
106 # define WEOF (0xffffffffu)
109 /* For XPG4 compliance we have to define the stuff from <wctype.h> here
111 #if defined __USE_XOPEN && !defined __USE_UNIX98
115 /* This incomplete type is defined in <time.h> but needed here because
122 /* Copy SRC to DEST. */
123 extern wchar_t *wcscpy (wchar_t *__restrict __dest,
124 __const wchar_t *__restrict __src) __THROW;
125 /* Copy no more than N wide-characters of SRC to DEST. */
126 extern wchar_t *wcsncpy (wchar_t *__restrict __dest,
127 __const wchar_t *__restrict __src, size_t __n)
130 /* Append SRC onto DEST. */
131 extern wchar_t *wcscat (wchar_t *__restrict __dest,
132 __const wchar_t *__restrict __src) __THROW;
133 /* Append no more than N wide-characters of SRC onto DEST. */
134 extern wchar_t *wcsncat (wchar_t *__restrict __dest,
135 __const wchar_t *__restrict __src, size_t __n)
138 /* Compare S1 and S2. */
139 extern int wcscmp (__const wchar_t *__s1, __const wchar_t *__s2)
140 __THROW __attribute_pure__;
141 /* Compare N wide-characters of S1 and S2. */
142 extern int wcsncmp (__const wchar_t *__s1, __const wchar_t *__s2, size_t __n)
143 __THROW __attribute_pure__;
146 /* Compare S1 and S2, ignoring case. */
147 extern int wcscasecmp (__const wchar_t *__s1, __const wchar_t *__s2) __THROW;
149 /* Compare no more than N chars of S1 and S2, ignoring case. */
150 extern int wcsncasecmp (__const wchar_t *__s1, __const wchar_t *__s2,
153 /* Similar to the two functions above but take the information from
154 the provided locale and not the global locale. */
156 # include <xlocale.h>
158 extern int __wcscasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
159 __locale_t __loc) __THROW;
161 extern int __wcsncasecmp_l (__const wchar_t *__s1, __const wchar_t *__s2,
162 size_t __n, __locale_t __loc) __THROW;
166 /* Compare S1 and S2, both interpreted as appropriate to the
167 LC_COLLATE category of the current locale. */
168 extern int wcscoll (__const wchar_t *__s1, __const wchar_t *__s2) __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 (wchar_t *__restrict __s1,
173 __const wchar_t *__restrict __s2, size_t __n) __THROW;
177 /* Similar to the two functions above but take the information from
178 the provided locale and not the global locale. */
180 /* Compare S1 and S2, both interpreted as appropriate to the
181 LC_COLLATE category of the given locale. */
182 extern int __wcscoll_l (__const wchar_t *__s1, __const wchar_t *__s2,
183 __locale_t __loc) __THROW;
184 /* Transform S2 into array pointed to by S1 such that if wcscmp is
185 applied to two transformed strings the result is the as applying
186 `wcscoll' to the original strings. */
187 extern size_t __wcsxfrm_l (wchar_t *__s1, __const wchar_t *__s2,
188 size_t __n, __locale_t __loc) __THROW;
191 /* Duplicate S, returning an identical malloc'd string. */
192 extern wchar_t *wcsdup (__const wchar_t *__s) __THROW __attribute_malloc__;
195 /* Find the first occurrence of WC in WCS. */
196 extern wchar_t *wcschr (__const wchar_t *__wcs, wchar_t __wc)
197 __THROW __attribute_pure__;
198 /* Find the last occurrence of WC in WCS. */
199 extern wchar_t *wcsrchr (__const wchar_t *__wcs, wchar_t __wc)
200 __THROW __attribute_pure__;
203 /* This function is similar to `wcschr'. But it returns a pointer to
204 the closing NUL wide character in case C is not found in S. */
205 extern wchar_t *wcschrnul (__const wchar_t *__s, wchar_t __wc)
206 __THROW __attribute_pure__;
209 /* Return the length of the initial segmet of WCS which
210 consists entirely of wide characters not in REJECT. */
211 extern size_t wcscspn (__const wchar_t *__wcs, __const wchar_t *__reject)
212 __THROW __attribute_pure__;
213 /* Return the length of the initial segmet of WCS which
214 consists entirely of wide characters in ACCEPT. */
215 extern size_t wcsspn (__const wchar_t *__wcs, __const wchar_t *__accept)
216 __THROW __attribute_pure__;
217 /* Find the first occurrence in WCS of any character in ACCEPT. */
218 extern wchar_t *wcspbrk (__const wchar_t *__wcs, __const wchar_t *__accept)
219 __THROW __attribute_pure__;
220 /* Find the first occurrence of NEEDLE in HAYSTACK. */
221 extern wchar_t *wcsstr (__const wchar_t *__haystack, __const wchar_t *__needle)
222 __THROW __attribute_pure__;
225 /* Another name for `wcsstr' from XPG4. */
226 extern wchar_t *wcswcs (__const wchar_t *__haystack, __const wchar_t *__needle)
227 __THROW __attribute_pure__;
230 /* Divide WCS into tokens separated by characters in DELIM. */
231 extern wchar_t *wcstok (wchar_t *__restrict __s,
232 __const wchar_t *__restrict __delim,
233 wchar_t **__restrict __ptr) __THROW;
235 /* Return the number of wide characters in S. */
236 extern size_t wcslen (__const wchar_t *__s) __THROW __attribute_pure__;
239 /* Return the number of wide characters in S, but at most MAXLEN. */
240 extern size_t wcsnlen (__const wchar_t *__s, size_t __maxlen)
241 __THROW __attribute_pure__;
245 /* Search N wide characters of S for C. */
246 extern wchar_t *wmemchr (__const wchar_t *__s, wchar_t __c, size_t __n)
247 __THROW __attribute_pure__;
249 /* Compare N wide characters of S1 and S2. */
250 extern int wmemcmp (__const wchar_t *__restrict __s1,
251 __const wchar_t *__restrict __s2, size_t __n)
252 __THROW __attribute_pure__;
254 /* Copy N wide characters of SRC to DEST. */
255 extern wchar_t *wmemcpy (wchar_t *__restrict __s1,
256 __const wchar_t *__restrict __s2, size_t __n) __THROW;
258 /* Copy N wide characters of SRC to DEST, guaranteeing
259 correct behavior for overlapping strings. */
260 extern wchar_t *wmemmove (wchar_t *__s1, __const wchar_t *__s2, size_t __n)
263 /* Set N wide characters of S to C. */
264 extern wchar_t *wmemset (wchar_t *__s, wchar_t __c, size_t __n) __THROW;
267 /* Copy N wide characters of SRC to DEST and return pointer to following
269 extern wchar_t *wmempcpy (wchar_t *__restrict __s1,
270 __const wchar_t *__restrict __s2, size_t __n)
275 /* Determine whether C constitutes a valid (one-byte) multibyte
277 extern wint_t btowc (int __c) __THROW;
279 /* Determine whether C corresponds to a member of the extended
280 character set whose multibyte representation is a single byte. */
281 extern int wctob (wint_t __c) __THROW;
283 /* Determine whether PS points to an object representing the initial
285 extern int mbsinit (__const mbstate_t *__ps) __THROW __attribute_pure__;
287 /* Write wide character representation of multibyte character pointed
289 extern size_t mbrtowc (wchar_t *__restrict __pwc,
290 __const char *__restrict __s, size_t __n,
291 mbstate_t *__p) __THROW;
293 /* Write multibyte representation of wide character WC to S. */
294 extern size_t wcrtomb (char *__restrict __s, wchar_t __wc,
295 mbstate_t *__restrict __ps) __THROW;
297 /* Return number of bytes in multibyte character pointed to by S. */
298 extern size_t __mbrlen (__const char *__restrict __s, size_t __n,
299 mbstate_t *__restrict __ps) __THROW;
300 extern size_t mbrlen (__const char *__restrict __s, size_t __n,
301 mbstate_t *__restrict __ps) __THROW;
304 /* #ifdef __USE_EXTERN_INLINES */
305 /* Define inline function as optimization. */
306 extern __inline size_t mbrlen (__const char *__restrict __s, size_t __n,
307 mbstate_t *__restrict __ps) __THROW
308 { return (__ps != NULL
309 ? mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
312 /* Write wide character representation of multibyte character string
314 extern size_t mbsrtowcs (wchar_t *__restrict __dst,
315 __const char **__restrict __src, size_t __len,
316 mbstate_t *__restrict __ps) __THROW;
318 /* Write multibyte character representation of wide character string
320 extern size_t wcsrtombs (char *__restrict __dst,
321 __const wchar_t **__restrict __src, size_t __len,
322 mbstate_t *__restrict __ps) __THROW;
326 /* Write wide character representation of at most NMC bytes of the
327 multibyte character string SRC to DST. */
328 extern size_t mbsnrtowcs (wchar_t *__restrict __dst,
329 __const char **__restrict __src, size_t __nmc,
330 size_t __len, mbstate_t *__restrict __ps) __THROW;
332 /* Write multibyte character representation of at most NWC characters
333 from the wide character string SRC to DST. */
334 extern size_t wcsnrtombs (char *__restrict __dst,
335 __const wchar_t **__restrict __src,
336 size_t __nwc, size_t __len,
337 mbstate_t *__restrict __ps) __THROW;
341 /* The following functions are extensions found in X/Open CAE. */
343 /* Determine number of column positions required for C. */
344 extern int wcwidth (wchar_t __c) __THROW;
346 /* Determine number of column positions required for first N wide
347 characters (or fewer if S ends before this) in S. */
348 extern int wcswidth (__const wchar_t *__s, size_t __n) __THROW;
349 #endif /* Use X/Open. */
352 /* Convert initial portion of the wide string NPTR to `double'
354 extern double wcstod (__const wchar_t *__restrict __nptr,
355 wchar_t **__restrict __endptr) __THROW;
358 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
359 extern float wcstof (__const wchar_t *__restrict __nptr,
360 wchar_t **__restrict __endptr) __THROW;
361 extern long double wcstold (__const wchar_t *__restrict __nptr,
362 wchar_t **__restrict __endptr) __THROW;
366 /* Convert initial portion of wide string NPTR to `long int'
368 extern long int wcstol (__const wchar_t *__restrict __nptr,
369 wchar_t **__restrict __endptr, int __base) __THROW;
371 /* Convert initial portion of wide string NPTR to `unsigned long int'
373 extern unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
374 wchar_t **__restrict __endptr, int __base)
377 #if defined __GNUC__ && defined __USE_GNU
378 /* Convert initial portion of wide string NPTR to `long int'
381 extern long long int wcstoq (__const wchar_t *__restrict __nptr,
382 wchar_t **__restrict __endptr, int __base)
385 /* Convert initial portion of wide string NPTR to `unsigned long long int'
388 extern unsigned long long int wcstouq (__const wchar_t *__restrict __nptr,
389 wchar_t **__restrict __endptr,
391 #endif /* GCC and use GNU. */
393 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_GNU)
394 /* Convert initial portion of wide string NPTR to `long int'
397 extern long long int wcstoll (__const wchar_t *__restrict __nptr,
398 wchar_t **__restrict __endptr, int __base)
401 /* Convert initial portion of wide string NPTR to `unsigned long long int'
404 extern unsigned long long int wcstoull (__const wchar_t *__restrict __nptr,
405 wchar_t **__restrict __endptr,
407 #endif /* ISO C99 or GCC and GNU. */
410 /* #ifdef __USE_GNU */
411 /* The concept of one static locale per category is not very well
412 thought out. Many applications will need to process its data using
413 information from several different locales. Another application is
414 the implementation of the internationalization handling in the
415 upcoming ISO C++ standard library. To support this another set of
416 the functions using locale data exist which have an additional
419 Attention: all these functions are *not* standardized in any form.
420 This is a proof-of-concept implementation. */
422 /* Structure for reentrant locale using functions. This is an
423 (almost) opaque type for the user level programs. */
424 # include <xlocale.h>
426 /* Special versions of the functions above which take the locale to
427 use as an additional parameter. */
428 extern long int __wcstol_l (__const wchar_t *__restrict __nptr,
429 wchar_t **__restrict __endptr, int __base,
430 __locale_t __loc) __THROW;
432 extern unsigned long int __wcstoul_l (__const wchar_t *__restrict __nptr,
433 wchar_t **__restrict __endptr,
434 int __base, __locale_t __loc) __THROW;
437 extern long long int __wcstoll_l (__const wchar_t *__restrict __nptr,
438 wchar_t **__restrict __endptr,
439 int __base, __locale_t __loc) __THROW;
442 extern unsigned long long int __wcstoull_l (__const wchar_t *__restrict __nptr,
443 wchar_t **__restrict __endptr,
444 int __base, __locale_t __loc)
447 extern double __wcstod_l (__const wchar_t *__restrict __nptr,
448 wchar_t **__restrict __endptr, __locale_t __loc)
451 extern float __wcstof_l (__const wchar_t *__restrict __nptr,
452 wchar_t **__restrict __endptr, __locale_t __loc)
455 extern long double __wcstold_l (__const wchar_t *__restrict __nptr,
456 wchar_t **__restrict __endptr,
457 __locale_t __loc) __THROW;
462 /* The internal entry points for `wcstoX' take an extra flag argument
463 saying whether or not to parse locale-dependent number grouping. */
464 extern double __wcstod_internal (__const wchar_t *__restrict __nptr,
465 wchar_t **__restrict __endptr, int __group)
467 extern float __wcstof_internal (__const wchar_t *__restrict __nptr,
468 wchar_t **__restrict __endptr, int __group)
470 extern long double __wcstold_internal (__const wchar_t *__restrict __nptr,
471 wchar_t **__restrict __endptr,
472 int __group) __THROW;
474 #ifndef __wcstol_internal_defined
475 extern long int __wcstol_internal (__const wchar_t *__restrict __nptr,
476 wchar_t **__restrict __endptr,
477 int __base, int __group) __THROW;
478 # define __wcstol_internal_defined 1
480 #ifndef __wcstoul_internal_defined
481 extern unsigned long int __wcstoul_internal (__const wchar_t *__restrict __npt,
482 wchar_t **__restrict __endptr,
483 int __base, int __group) __THROW;
484 # define __wcstoul_internal_defined 1
486 #ifndef __wcstoll_internal_defined
488 extern long long int __wcstoll_internal (__const wchar_t *__restrict __nptr,
489 wchar_t **__restrict __endptr,
490 int __base, int __group) __THROW;
491 # define __wcstoll_internal_defined 1
493 #ifndef __wcstoull_internal_defined
495 extern unsigned long long int __wcstoull_internal (__const wchar_t *
500 int __group) __THROW;
501 # define __wcstoull_internal_defined 1
505 #if defined __OPTIMIZE__ && __GNUC__ >= 2
506 /* Define inline functions which call the internal entry points. */
508 extern __inline double wcstod (__const wchar_t *__restrict __nptr,
509 wchar_t **__restrict __endptr) __THROW
510 { return __wcstod_internal (__nptr, __endptr, 0); }
511 extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
512 wchar_t **__restrict __endptr,
514 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
515 extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
516 wchar_t **__restrict __endptr,
518 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
521 extern __inline float wcstof (__const wchar_t *__restrict __nptr,
522 wchar_t **__restrict __endptr) __THROW
523 { return __wcstof_internal (__nptr, __endptr, 0); }
524 extern __inline long double wcstold (__const wchar_t *__restrict __nptr,
525 wchar_t **__restrict __endptr) __THROW
526 { return __wcstold_internal (__nptr, __endptr, 0); }
530 extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
531 wchar_t **__restrict __endptr,
533 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
535 extern __inline unsigned long long int wcstouq (__const wchar_t *
537 wchar_t **__restrict __endptr,
539 { return __wcstoull_internal (__nptr, __endptr, __base, 0); }
540 # endif /* Use GNU. */
541 #endif /* Optimizing GCC >=2. */
546 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
548 extern wchar_t *wcpcpy (wchar_t *__dest, __const wchar_t *__src) __THROW;
550 /* Copy no more than N characters of SRC to DEST, returning the address of
551 the last character written into DEST. */
552 extern wchar_t *wcpncpy (wchar_t *__dest, __const wchar_t *__src, size_t __n)
557 /* Wide character I/O functions. */
558 #if defined __USE_ISOC99 || defined __USE_UNIX98
560 /* Select orientation for stream. */
561 extern int fwide (__FILE *__fp, int __mode) __THROW;
564 /* Write formatted output to STREAM. */
565 extern int fwprintf (__FILE *__restrict __stream,
566 __const wchar_t *__restrict __format, ...)
567 __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 3))) */;
568 /* Write formatted output to stdout. */
569 extern int wprintf (__const wchar_t *__restrict __format, ...)
570 __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 2))) */;
571 /* Write formatted output of at most N characters to S. */
572 extern int swprintf (wchar_t *__restrict __s, size_t __n,
573 __const wchar_t *__restrict __format, ...)
574 __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 4))) */;
576 /* Write formatted output to S from argument list ARG. */
577 extern int vfwprintf (__FILE *__restrict __s,
578 __const wchar_t *__restrict __format,
579 __gnuc_va_list __arg)
580 __THROW /* __attribute__ ((__format__ (__wprintf__, 2, 0))) */;
581 /* Write formatted output to stdout from argument list ARG. */
582 extern int vwprintf (__const wchar_t *__restrict __format,
583 __gnuc_va_list __arg)
584 __THROW /* __attribute__ ((__format__ (__wprintf__, 1, 0))) */;
585 /* Write formatted output of at most N character to S from argument
587 extern int vswprintf (wchar_t *__restrict __s, size_t __n,
588 __const wchar_t *__restrict __format,
589 __gnuc_va_list __arg)
590 __THROW /* __attribute__ ((__format__ (__wprintf__, 3, 0))) */;
593 /* Read formatted input from STREAM. */
594 extern int fwscanf (__FILE *__restrict __stream,
595 __const wchar_t *__restrict __format, ...)
596 __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
597 /* Read formatted input from stdin. */
598 extern int wscanf (__const wchar_t *__restrict __format, ...)
599 __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 2))) */;
600 /* Read formatted input from S. */
601 extern int swscanf (__const wchar_t *__restrict __s,
602 __const wchar_t *__restrict __format, ...)
603 __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 3))) */;
604 #endif /* Use ISO C99 and Unix98. */
607 /* Read formatted input from S into argument list ARG. */
608 extern int vfwscanf (__FILE *__restrict __s,
609 __const wchar_t *__restrict __format,
610 __gnuc_va_list __arg)
611 __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
612 /* Read formatted input from stdin into argument list ARG. */
613 extern int vwscanf (__const wchar_t *__restrict __format,
614 __gnuc_va_list __arg)
615 __THROW /* __attribute__ ((__format__ (__wscanf__, 1, 0))) */;
616 /* Read formatted input from S into argument list ARG. */
617 extern int vswscanf (__const wchar_t *__restrict __s,
618 __const wchar_t *__restrict __format,
619 __gnuc_va_list __arg)
620 __THROW /* __attribute__ ((__format__ (__wscanf__, 2, 0))) */;
621 #endif /* Use ISO C99. */
624 /* Read a character from STREAM. */
625 extern wint_t fgetwc (__FILE *__stream) __THROW;
626 extern wint_t getwc (__FILE *__stream) __THROW;
628 /* Read a character from stdin. */
629 extern wint_t getwchar (void) __THROW;
632 /* Write a character to STREAM. */
633 extern wint_t fputwc (wchar_t __wc, __FILE *__stream) __THROW;
634 extern wint_t putwc (wchar_t __wc, __FILE *__stream) __THROW;
636 /* Write a character to stdout. */
637 extern wint_t putwchar (wchar_t __wc) __THROW;
640 /* Get a newline-terminated wide character string of finite length
642 extern wchar_t *fgetws (wchar_t *__restrict __ws, int __n,
643 __FILE *__restrict __stream) __THROW;
645 /* Write a string to STREAM. */
646 extern int fputws (__const wchar_t *__restrict __ws,
647 __FILE *__restrict __stream) __THROW;
650 /* Push a character back onto the input buffer of STREAM. */
651 extern wint_t ungetwc (wint_t __wc, __FILE *__stream) __THROW;
655 /* These are defined to be equivalent to the `char' functions defined
657 extern wint_t getwc_unlocked (__FILE *__stream) __THROW;
658 extern wint_t getwchar_unlocked (void) __THROW;
660 /* This is the wide character version of a GNU extension. */
661 extern wint_t fgetwc_unlocked (__FILE *__stream) __THROW;
663 /* Faster version when locking is not necessary. */
664 extern wint_t fputwc_unlocked (wchar_t __wc, __FILE *__stream) __THROW;
666 /* These are defined to be equivalent to the `char' functions defined
668 extern wint_t putwc_unlocked (wchar_t __wc, __FILE *__stream) __THROW;
669 extern wint_t putwchar_unlocked (wchar_t __wc) __THROW;
672 /* This function does the same as `fgetws' but does not lock the stream. */
673 extern wchar_t *fgetws_unlocked (wchar_t *__restrict __ws, int __n,
674 __FILE *__restrict __stream) __THROW;
676 /* This function does the same as `fputws' but does not lock the stream. */
677 extern int fputws_unlocked (__const wchar_t *__restrict __ws,
678 __FILE *__restrict __stream) __THROW;
682 /* Format TP into S according to FORMAT.
683 Write no more than MAXSIZE wide characters and return the number
684 of wide characters written, or 0 if it would exceed MAXSIZE. */
685 extern size_t wcsftime (wchar_t *__restrict __s, size_t __maxsize,
686 __const wchar_t *__restrict __format,
687 __const struct tm *__restrict __tp) __THROW;
689 /* The X/Open standard demands that most of the functions defined in
690 the <wctype.h> header must also appear here. This is probably
691 because some X/Open members wrote their implementation before the
692 ISO C standard was published and introduced the better solution.
693 We have to provide these definitions for compliance reasons but we
694 do this nonsense only if really necessary. */
695 #if defined __USE_UNIX98 && !defined __USE_GNU
696 # define __need_iswxxx
702 #endif /* _WCHAR_H defined */