wcsmbs/wchar.h

   1 /* Copyright (C) 1995, 1996, 1997, 1998 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 #define _WCHAR_H 1
  26
  27 #include <features.h>
  28
  29 /* Get FILE definition.  */
  30 #define __need_FILE
  31 #include <stdio.h>
  32
  33 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  34 #define __need_size_t
  35 #define __need_wchar_t
  36 #define __need_wint_t
  37 #define __need_NULL
  38 #include <stddef.h>
  39
  40 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  41    there.  So define it ourselves if it remains undefined.  */
  42 #ifndef _WINT_T
  43 /* Integral type unchanged by default argument promotions that can
  44    hold any value corresponding to members of the extended character
  45    set, as well as at least one value that does not correspond to any
  46    member of the extended character set.  */
  47 # define _WINT_T
  48 typedef unsigned int wint_t;
  49 #endif
  50
  51
  52 /* Conversion state information.  */
  53 typedef struct
  54 {
  55   int count;            /* Number of bytes needed for the current character. */
  56   wint_t value;         /* Value so far.  */
  57 } mbstate_t;
  58
  59 #ifndef WCHAR_MIN
  60 /* These constants might also be defined in <inttypes.h>.  */
  61 # define WCHAR_MIN ((wchar_t) 0)
  62 # define WCHAR_MAX (~WCHAR_MIN)
  63 #endif
  64
  65 #ifndef WEOF
  66 # define WEOF (0xffffffffu)
  67 #endif
  68
  69 /* For XPG4 compliance we have to define the stuff from <wctype.h> here
  70    as well.  */
  71 #if defined __USE_XOPEN && !defined __USE_UNIX98
  72 # include <wctype.h>
  73 #endif
  74
  75 /* This incomplete type is defined in <time.h> but needed here because
  76    of `wcsftime'.  */
  77 struct tm;
  78
  79
  80 __BEGIN_DECLS
  81
  82 /* Copy SRC to DEST.  */
  83 extern wchar_t *wcscpy __P ((wchar_t *__restrict __dest,
  84                              __const wchar_t *__restrict __src));
  85 /* Copy no more than N wide-characters of SRC to DEST.  */
  86 extern wchar_t *wcsncpy __P ((wchar_t *__restrict __dest,
  87                               __const wchar_t *__restrict __src, size_t __n));
  88
  89 /* Append SRC onto DEST.  */
  90 extern wchar_t *wcscat __P ((wchar_t *__restrict __dest,
  91                              __const wchar_t *__restrict __src));
  92 /* Append no more than N wide-characters of SRC onto DEST.  */
  93 extern wchar_t *wcsncat __P ((wchar_t *__restrict __dest,
  94                               __const wchar_t *__restrict __src, size_t __n));
  95
  96 /* Compare S1 and S2.  */
  97 extern int wcscmp __P ((__const wchar_t *__s1, __const wchar_t *__s2));
  98 /* Compare N wide-characters of S1 and S2.  */
  99 extern int wcsncmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 100                          size_t __n));
 101
 102 #ifdef __USE_GNU
 103 /* Compare S1 and S2, ignoring case.  */
 104 extern int __wcscasecmp __P ((__const wchar_t *__s1, __const wchar_t *__s2));
 105 extern int wcscasecmp __P ((__const wchar_t *__s1, __const wchar_t *__s2));
 106
 107 /* Compare no more than N chars of S1 and S2, ignoring case.  */
 108 extern int __wcsncasecmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 109                                size_t __n));
 110 extern int wcsncasecmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 111                              size_t __n));
 112
 113 /* Similar to the two functions above but take the information from
 114    the provided locale and not the global locale.  */
 115 # include <xlocale.h>
 116
 117 extern int __wcscasecmp_l __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 118                                 __locale_t __loc));
 119
 120 extern int __wcsncasecmp_l __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 121                                  size_t __n, __locale_t __loc));
 122 #endif
 123
 124 /* Compare S1 and S2, both interpreted as appropriate to the
 125    LC_COLLATE category of the current locale.  */
 126 extern int wcscoll __P ((__const wchar_t *__s1, __const wchar_t *__s2));
 127 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 128    applied to two transformed strings the result is the as applying
 129    `wcscoll' to the original strings.  */
 130 extern size_t wcsxfrm __P ((wchar_t *__restrict __s1,
 131                             __const wchar_t *__restrict __s2, size_t __n));
 132
 133 #ifdef __USE_GNU
 134 /* Similar to the two functions above but take the information from
 135    the provided locale and not the global locale.  */
 136
 137 /* Compare S1 and S2, both interpreted as appropriate to the
 138    LC_COLLATE category of the given locale.  */
 139 extern int __wcscoll_l __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 140                              __locale_t __loc));
 141 /* Transform S2 into array pointed to by S1 such that if wcscmp is
 142    applied to two transformed strings the result is the as applying
 143    `wcscoll' to the original strings.  */
 144 extern size_t __wcsxfrm_l __P ((wchar_t *__s1, __const wchar_t *__s2,
 145                                 size_t __n, __locale_t __loc));
 146
 147 /* Duplicate S, returning an identical malloc'd string.  */
 148 extern wchar_t *wcsdup __P ((__const wchar_t *__s));
 149 #endif
 150
 151 /* Find the first occurrence of WC in WCS.  */
 152 extern wchar_t *wcschr __P ((__const wchar_t *__wcs, wchar_t __wc));
 153 /* Find the last occurrence of WC in WCS.  */
 154 extern wchar_t *wcsrchr __P ((__const wchar_t *__wcs, wchar_t __wc));
 155
 156 /* Return the length of the initial segmet of WCS which
 157    consists entirely of wide characters not in REJECT.  */
 158 extern size_t wcscspn __P ((__const wchar_t *__wcs,
 159                             __const wchar_t *__reject));
 160 /* Return the length of the initial segmet of WCS which
 161    consists entirely of wide characters in  ACCEPT.  */
 162 extern size_t wcsspn __P ((__const wchar_t *__wcs, __const wchar_t *__accept));
 163 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 164 extern wchar_t *wcspbrk __P ((__const wchar_t *__wcs,
 165                               __const wchar_t *__accept));
 166 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 167 extern wchar_t *wcsstr __P ((__const wchar_t *__haystack,
 168                              __const wchar_t *__needle));
 169
 170 #if defined __USE_XOPEN && !defined __USE_UNIX98
 171 /* Another name for `wcsstr' from XPG4.  */
 172 extern wchar_t *wcswcs __P ((__const wchar_t *__haystack,
 173                              __const wchar_t *__needle));
 174 #endif
 175
 176 /* Divide WCS into tokens separated by characters in DELIM.  */
 177 extern wchar_t *wcstok __P ((wchar_t *__restrict __s,
 178                              __const wchar_t *__restrict __delim,
 179                              wchar_t **__restrict __ptr));
 180
 181 /* Return the number of wide characters in S.  */
 182 extern size_t __wcslen __P ((__const wchar_t *__s));
 183 extern size_t wcslen __P ((__const wchar_t *__s));
 184
 185 #ifdef __USE_GNU
 186 /* Return the number of wide characters in S, but at most MAXLEN.  */
 187 extern size_t __wcsnlen __P ((__const wchar_t *__s, size_t __maxlen));
 188 extern size_t wcsnlen __P ((__const wchar_t *__s, size_t __maxlen));
 189 #endif
 190
 191
 192 /* Search N wide characters of S for C.  */
 193 extern wchar_t *wmemchr __P ((__const wchar_t *__s, wchar_t __c, size_t __n));
 194
 195 /* Compare N wide characters of S1 and S2.  */
 196 extern int wmemcmp __P ((__const wchar_t *__restrict __s1,
 197                          __const wchar_t *__restrict __s2, size_t __n));
 198
 199 /* Copy N wide characters of SRC to DEST.  */
 200 extern wchar_t *wmemcpy __P ((wchar_t *__restrict __s1,
 201                               __const wchar_t *__restrict __s2, size_t __n));
 202
 203 /* Copy N wide characters of SRC to DEST, guaranteeing
 204    correct behavior for overlapping strings.  */
 205 extern wchar_t *wmemmove __P ((wchar_t *__s1, __const wchar_t *__s2,
 206                                size_t __n));
 207
 208 /* Set N wide characters of S to C.  */
 209 extern wchar_t *wmemset __P ((wchar_t *__s, wchar_t __c, size_t __n));
 210
 211
 212 /* Determine whether C constitutes a valid (one-byte) multibyte
 213    character.  */
 214 extern wint_t __btowc __P ((int __c));
 215 extern wint_t btowc __P ((int __c));
 216
 217 /* Determine whether C corresponds to a member of the extended
 218    character set whose multibyte representation is a single byte.  */
 219 extern int wctob __P ((wint_t __c));
 220
 221 /* Determine whether PS points to an object representing the initial
 222    state.  */
 223 extern int __mbsinit __P ((__const mbstate_t *__ps));
 224 extern int mbsinit __P ((__const mbstate_t *__ps));
 225
 226 /* Write wide character representation of multibyte character pointed
 227    to by S to PWC.  */
 228 extern size_t __mbrtowc __P ((wchar_t *__restrict __pwc,
 229                               __const char *__restrict __s, size_t __n,
 230                               mbstate_t *__restrict __p));
 231 extern size_t mbrtowc __P ((wchar_t *__restrict __pwc,
 232                             __const char *__restrict __s, size_t __n,
 233                             mbstate_t *__p));
 234
 235 /* Write multibyte representation of wide character WC to S.  */
 236 extern size_t __wcrtomb __P ((char *__restrict __s, wchar_t __wc,
 237                               mbstate_t *__restrict __ps));
 238 extern size_t wcrtomb __P ((char *__restrict __s, wchar_t __wc,
 239                             mbstate_t *__restrict __ps));
 240
 241 /* Return number of bytes in multibyte character pointed to by S.  */
 242 extern size_t __mbrlen __P ((__const char *__restrict __s, size_t __n,
 243                              mbstate_t *__restrict __ps));
 244 extern size_t mbrlen __P ((__const char *__restrict __s, size_t __n,
 245                            mbstate_t *__restrict __ps));
 246
 247 #if defined __OPTIMIZE__ \
 248     && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 249 /* Define inline function as optimization.  */
 250 extern __inline size_t mbrlen (__const char *__restrict __s, size_t __n,
 251                                mbstate_t *__restrict __ps)
 252 { return (__ps != NULL
 253           ? __mbrtowc (NULL, __s, __n, __ps) : __mbrlen (__s, __n, NULL)); }
 254 #endif
 255
 256 /* Write wide character representation of multibyte character string
 257    SRC to DST.  */
 258 extern size_t __mbsrtowcs __P ((wchar_t *__restrict __dst,
 259                                 __const char **__restrict __src,
 260                                 size_t __len, mbstate_t *__restrict __ps));
 261 extern size_t mbsrtowcs __P ((wchar_t *__restrict __dst,
 262                               __const char **__restrict __src,
 263                               size_t __len, mbstate_t *__restrict __ps));
 264
 265 /* Write multibyte character representation of wide character string
 266    SRC to DST.  */
 267 extern size_t __wcsrtombs __P ((char *__restrict __dst,
 268                                 __const wchar_t **__restrict __src,
 269                                 size_t __len, mbstate_t *__restrict __ps));
 270 extern size_t wcsrtombs __P ((char *__restrict __dst,
 271                               __const wchar_t **__restrict __src,
 272                               size_t __len, mbstate_t *__restrict __ps));
 273
 274
 275 #ifdef  __USE_GNU
 276 /* Write wide character representation of at most NMC bytes of the
 277    multibyte character string SRC to DST.  */
 278 extern size_t __mbsnrtowcs __P ((wchar_t *__restrict __dst,
 279                                  __const char **__restrict __src, size_t __nmc,
 280                                  size_t __len, mbstate_t *__restrict __ps));
 281 extern size_t mbsnrtowcs __P ((wchar_t *__restrict __dst,
 282                                __const char **__restrict __src, size_t __nmc,
 283                                size_t __len, mbstate_t *__restrict __ps));
 284
 285 /* Write multibyte character representation of at most NWC characters
 286    from the wide character string SRC to DST.  */
 287 extern size_t __wcsnrtombs __P ((char *__restrict __dst,
 288                                  __const wchar_t **__restrict __src,
 289                                  size_t __nwc, size_t __len,
 290                                  mbstate_t *__restrict __ps));
 291 extern size_t wcsnrtombs __P ((char *__restrict __dst,
 292                                __const wchar_t **__restrict __src,
 293                                size_t __nwc, size_t __len,
 294                                mbstate_t *__restrict __ps));
 295 #endif  /* use GNU */
 296
 297
 298 /* The following functions are extensions found in X/Open CAE.  */
 299 #ifdef __USE_XOPEN
 300 /* Determine number of column positions required for C.  */
 301 extern int wcwidth __P ((wint_t __c));
 302
 303 /* Determine number of column positions required for first N wide
 304    characters (or fewer if S ends before this) in S.  */
 305 extern int wcswidth __P ((__const wchar_t *__s, size_t __n));
 306 #endif  /* Use X/Open.  */
 307
 308
 309 /* Convert initial portion of the wide string NPTR to `double'
 310    representation.  */
 311 extern double wcstod __P ((__const wchar_t *__restrict __nptr,
 312                            wchar_t **__restrict __endptr));
 313
 314 #ifdef __USE_GNU
 315 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 316 extern float wcstof __P ((__const wchar_t *__restrict __nptr,
 317                           wchar_t **__restrict __endptr));
 318 extern __long_double_t wcstold __P ((__const wchar_t *__restrict __nptr,
 319                                      wchar_t **__restrict __endptr));
 320 #endif /* GNU */
 321
 322
 323 /* Convert initial portion of wide string NPTR to `long int'
 324    representation.  */
 325 extern long int wcstol __P ((__const wchar_t *__restrict __nptr,
 326                              wchar_t **__restrict __endptr, int __base));
 327
 328 /* Convert initial portion of wide string NPTR to `unsigned long int'
 329    representation.  */
 330 extern unsigned long int wcstoul __P ((__const wchar_t *__restrict __nptr,
 331                                        wchar_t **__restrict __endptr,
 332                                        int __base));
 333
 334 #if defined __GNUC__ && defined __USE_GNU
 335 /* Convert initial portion of wide string NPTR to `long int'
 336    representation.  */
 337 extern long long int wcstoq __P ((__const wchar_t *__restrict __nptr,
 338                                   wchar_t **__restrict __endptr, int __base));
 339
 340 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 341    representation.  */
 342 extern unsigned long long int wcstouq __P ((__const wchar_t *__restrict __nptr,
 343                                             wchar_t **__restrict __endptr,
 344                                             int __base));
 345 #endif /* GCC and use GNU.  */
 346
 347 #if defined __USE_ISOC9X || (defined __GNUC__ && defined __USE_GNU)
 348 /* Convert initial portion of wide string NPTR to `long int'
 349    representation.  */
 350 extern long long int wcstoll __P ((__const wchar_t *__restrict __nptr,
 351                                    wchar_t **__restrict __endptr, int __base));
 352
 353 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 354    representation.  */
 355 extern unsigned long long int wcstoull __P ((__const wchar_t *
 356                                              __restrict __nptr,
 357                                              wchar_t **__restrict __endptr,
 358                                              int __base));
 359 #endif /* ISO C 9X or GCC and GNU.  */
 360
 361 #ifdef __USE_GNU
 362 /* The concept of one static locale per category is not very well
 363    thought out.  Many applications will need to process its data using
 364    information from several different locales.  Another application is
 365    the implementation of the internationalization handling in the
 366    upcoming ISO C++ standard library.  To support this another set of
 367    the functions using locale data exist which have an additional
 368    argument.
 369
 370    Attention: all these functions are *not* standardized in any form.
 371    This is a proof-of-concept implementation.  */
 372
 373 /* Structure for reentrant locale using functions.  This is an
 374    (almost) opaque type for the user level programs.  */
 375 # include <xlocale.h>
 376
 377 /* Special versions of the functions above which take the locale to
 378    use as an additional parameter.  */
 379 extern long int __wcstol_l __P ((__const wchar_t *__restrict __nptr,
 380                                  wchar_t **__restrict __endptr, int __base,
 381                                  __locale_t __loc));
 382
 383 extern unsigned long int __wcstoul_l __P ((__const wchar_t *__restrict __nptr,
 384                                            wchar_t **__restrict __endptr,
 385                                            int __base, __locale_t __loc));
 386
 387 extern long long int __wcstoll_l __P ((__const wchar_t *__restrict __nptr,
 388                                        wchar_t **__restrict __endptr,
 389                                        int __base, __locale_t __loc));
 390
 391 extern unsigned long long int __wcstoull_l __P ((__const wchar_t *__restrict
 392                                                  __nptr,
 393                                                  wchar_t **__restrict __endptr,
 394                                                  int __base,
 395                                                  __locale_t __loc));
 396
 397 extern double __wcstod_l __P ((__const wchar_t *__restrict __nptr,
 398                                wchar_t **__restrict __endptr,
 399                                __locale_t __loc));
 400
 401 extern float __wcstof_l __P ((__const wchar_t *__restrict __nptr,
 402                               wchar_t **__restrict __endptr,
 403                               __locale_t __loc));
 404
 405 extern __long_double_t __wcstold_l __P ((__const wchar_t *__restrict __nptr,
 406                                          wchar_t **__restrict __endptr,
 407                                          __locale_t __loc));
 408 #endif /* GNU */
 409
 410
 411 /* The internal entry points for `wcstoX' take an extra flag argument
 412    saying whether or not to parse locale-dependent number grouping.  */
 413 extern double __wcstod_internal __P ((__const wchar_t *__restrict __nptr,
 414                                       wchar_t **__restrict __endptr,
 415                                       int __group));
 416 extern float __wcstof_internal __P ((__const wchar_t *__restrict __nptr,
 417                                      wchar_t **__restrict __endptr,
 418                                      int __group));
 419 extern __long_double_t __wcstold_internal __P ((__const wchar_t *
 420                                                 __restrict __nptr,
 421                                                 wchar_t **__restrict __endptr,
 422                                                 int __group));
 423
 424 #ifndef __wcstol_internal_defined
 425 extern long int __wcstol_internal __P ((__const wchar_t *__restrict __nptr,
 426                                         wchar_t **__restrict __endptr,
 427                                         int __base, int __group));
 428 # define __wcstol_internal_defined      1
 429 #endif
 430 #ifndef __wcstoul_internal_defined
 431 extern unsigned long int __wcstoul_internal __P ((__const wchar_t *
 432                                                   __restrict __nptr,
 433                                                   wchar_t **
 434                                                   __restrict __endptr,
 435                                                   int __base, int __group));
 436 # define __wcstoul_internal_defined     1
 437 #endif
 438 #ifndef __wcstoll_internal_defined
 439 extern long long int __wcstoll_internal __P ((__const wchar_t *
 440                                               __restrict __nptr,
 441                                               wchar_t **__restrict __endptr,
 442                                               int __base, int __group));
 443 # define __wcstoll_internal_defined     1
 444 #endif
 445 #ifndef __wcstoull_internal_defined
 446 extern unsigned long long int __wcstoull_internal __P ((__const wchar_t *
 447                                                         __restrict __nptr,
 448                                                         wchar_t **
 449                                                         __restrict __endptr,
 450                                                         int __base,
 451                                                         int __group));
 452 # define __wcstoull_internal_defined    1
 453 #endif
 454
 455
 456 #if defined __OPTIMIZE__ && __GNUC__ >= 2
 457 /* Define inline functions which call the internal entry points.  */
 458
 459 extern __inline double wcstod (__const wchar_t *__restrict __nptr,
 460                                wchar_t **__restrict __endptr)
 461 { return __wcstod_internal (__nptr, __endptr, 0); }
 462 extern __inline long int wcstol (__const wchar_t *__restrict __nptr,
 463                                  wchar_t **__restrict __endptr, int __base)
 464 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 465 extern __inline unsigned long int wcstoul (__const wchar_t *__restrict __nptr,
 466                                            wchar_t **__restrict __endptr,
 467                                            int __base)
 468 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 469
 470 # ifdef __USE_GNU
 471 extern __inline float wcstof (__const wchar_t *__restrict __nptr,
 472                               wchar_t **__restrict __endptr)
 473 { return __wcstof_internal (__nptr, __endptr, 0); }
 474 extern __inline __long_double_t wcstold (__const wchar_t *__restrict __nptr,
 475                                          wchar_t **__restrict __endptr)
 476 { return __wcstold_internal (__nptr, __endptr, 0); }
 477
 478
 479 extern __inline long long int wcstoq (__const wchar_t *__restrict __nptr,
 480                                       wchar_t **__restrict __endptr,
 481                                       int __base)
 482 { return __wcstoll_internal (__nptr, __endptr, __base, 0); }
 483 extern __inline unsigned long long int wcstouq (__const wchar_t *
 484                                                 __restrict __nptr,
 485                                                 wchar_t **__restrict __endptr,
 486                                                 int __base)
 487 { return __wcstoull_internal (__nptr, __endptr, __base, 0); }
 488 # endif /* Use GNU.  */
 489 #endif /* Optimizing GCC >=2.  */
 490
 491
 492 #ifdef  __USE_GNU
 493 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 494    DEST.  */
 495 extern wchar_t *__wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 496 extern wchar_t *wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 497
 498 /* Copy no more than N characters of SRC to DEST, returning the address of
 499    the last character written into DEST.  */
 500 extern wchar_t *__wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 501                                 size_t __n));
 502 extern wchar_t *wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 503                               size_t __n));
 504 #endif  /* use GNU */
 505
 506
 507 /* The X/Open standard demands that most of the functions defined in
 508    the <wctype.h> header must also appear here.  This is probably
 509    because some X/Open members wrote their implementation before the
 510    ISO C standard was published and introduced the better solution.
 511    We have to provide these definitions for compliance reasons but we
 512    do this nonsense only if really necessary.  */
 513 #if defined __USE_UNIX98 && !defined __USE_GNU
 514 # define __need_iswxxx
 515 # include <wctype.h>
 516 #endif
 517
 518 __END_DECLS
 519
 520 #endif /* wchar.h  */