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