wcsmbs/wchar.h

   1 /* Copyright (C) 1995, 1996 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
  26 #define _WCHAR_H 1
  27 #include <features.h>
  28
  29 __BEGIN_DECLS
  30
  31 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  32 #define __need_size_t
  33 #define __need_wchar_t
  34 #define __need_wint_t
  35 #define __need_NULL
  36 #include <stddef.h>
  37
  38
  39 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  40    there.  So define it ourselves if it remains undefined.  */
  41 #ifndef _WINT_T
  42 /* Integral type unchanged by default argument promotions that can
  43    hold any value corresponding to members of the extended character
  44    set, as well as at least one value that does not correspond to any
  45    member of the extended character set.  */
  46 #define _WINT_T
  47 typedef unsigned int wint_t;
  48 #endif
  49
  50
  51 /* Conversion state information.  */
  52 typedef struct
  53 {
  54   int count;            /* Number of bytes needed for the current character. */
  55   wint_t value;         /* Value so far.  */
  56 } mbstate_t;
  57
  58 #define WCHAR_MIN ((wchar_t) 0)
  59 #define WCHAR_MAX (~WCHAR_MIN)
  60
  61 #ifndef WEOF
  62 # define WEOF (0xffffffffu)
  63 #endif
  64
  65
  66 /* Copy SRC to DEST.  */
  67 extern wchar_t *wcscpy __P ((wchar_t *__dest, __const wchar_t *__src));
  68 /* Copy no more than N wide-characters of SRC to DEST.  */
  69 extern wchar_t *wcsncpy __P ((wchar_t *__dest, __const wchar_t *__src,
  70                               size_t __n));
  71
  72 /* Append SRC onto DEST.  */
  73 extern wchar_t *wcscat __P ((wchar_t *__dest, __const wchar_t *__src));
  74 /* Append no more than N wide-characters of SRC onto DEST.  */
  75 extern wchar_t *wcsncat __P ((wchar_t *__dest, __const wchar_t *__src,
  76                               size_t __n));
  77
  78 /* Compare S1 and S2.  */
  79 extern int wcscmp __P ((__const wchar_t *__s1, __const wchar_t *__s2));
  80 /* Compare N wide-characters of S1 and S2.  */
  81 extern int wcsncmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
  82                          size_t __n));
  83
  84 /* Compare S1 and S2, both interpreted as appropriate to the
  85    LC_COLLATE category of the current locale.  */
  86 extern int wcscoll __P ((__const wchar_t *__s1, __const wchar_t *__s2));
  87 /* Transform S2 into array pointed to by S1 such that if wcscmp is
  88    applied to two transformed strings the result is the as applying
  89    `wcscoll' to the original strings.  */
  90 extern size_t wcsxfrm __P ((wchar_t *__s1, __const wchar_t *__s2, size_t __n));
  91
  92 /* Duplicate S, returning an identical malloc'd string.  */
  93 extern wchar_t *wcsdup __P ((__const wchar_t *__s));
  94
  95 /* Find the first occurrence of WC in WCS.  */
  96 extern wchar_t *wcschr __P ((__const wchar_t *__wcs, wchar_t __wc));
  97 /* Find the last occurrence of WC in WCS.  */
  98 extern wchar_t *wcsrchr __P ((__const wchar_t *__wcs, wchar_t __wc));
  99
 100 /* Return the length of the initial segmet of WCS which
 101    consists entirely of wide-characters not in REJECT.  */
 102 extern size_t wcscspn __P ((__const wchar_t *__wcs,
 103                             __const wchar_t *__reject));
 104 /* Return the length of the initial segmet of WCS which
 105    consists entirely of wide-characters in  ACCEPT.  */
 106 extern size_t wcsspn __P ((__const wchar_t *__wcs, __const wchar_t *__accept));
 107 /* Find the first occurrence in WCS of any character in ACCEPT.  */
 108 extern wchar_t *wcspbrk __P ((__const wchar_t *__wcs,
 109                               __const wchar_t *__accept));
 110 /* Find the first occurrence of NEEDLE in HAYSTACK.  */
 111 extern wchar_t *wcsstr __P ((__const wchar_t *__haystack,
 112                              __const wchar_t *__needle));
 113 /* Divide WCS into tokens separated by characters in DELIM.  */
 114 extern wchar_t *wcstok __P ((wchar_t *__s, __const wchar_t *__delim,
 115                              wchar_t **ptr));
 116
 117 /* Return the number of wide-characters in S.  */
 118 extern size_t wcslen __P ((__const wchar_t *__s));
 119
 120
 121 /* Search N bytes of S for C.  */
 122 extern wchar_t *wmemchr __P ((__const wchar_t *__s, wchar_t __c, size_t __n));
 123
 124 /* Compare N bytes of S1 and S2.  */
 125 extern int wmemcmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 126                          size_t __n));
 127
 128 /* Copy N bytes of SRC to DEST.  */
 129 extern wchar_t *wmemcpy __P ((wchar_t *__s1, __const wchar_t *__s2,
 130                               size_t __n));
 131
 132 /* Copy N bytes of SRC to DEST, guaranteeing
 133    correct behavior for overlapping strings.  */
 134 extern wchar_t *wmemmove __P ((wchar_t *__s1, __const wchar_t *__s2,
 135                                size_t __n));
 136
 137 /* Set N bytes of S to C.  */
 138 extern wchar_t *wmemset __P ((wchar_t *__s, wchar_t __c, size_t __n));
 139
 140
 141 /* Determine whether C constitutes a valid (one-byte) multibyte
 142    character.  */
 143 extern wint_t btowc __P ((int __c));
 144
 145 /* Determine whether C corresponds to a member of the extended
 146    character set whose multibyte representation is a single byte.  */
 147 extern int wctob __P ((wint_t __c));
 148
 149 /* Determine whether PS points to an object representing the initial
 150    state.  */
 151 extern int mbsinit __P ((__const mbstate_t *__ps));
 152
 153 /* Write wide character representation of multibyte character pointed
 154    to by S to PWC.  */
 155 extern size_t __mbrtowc __P ((wchar_t *__pwc, __const char *__s, size_t __n,
 156                               mbstate_t *__p));
 157 extern size_t mbrtowc __P ((wchar_t *__pwc, __const char *__s, size_t __n,
 158                             mbstate_t *__p));
 159
 160 /* Write multibyte representation of wide character WC to S.  */
 161 extern size_t __wcrtomb __P ((char *__s, wchar_t __wc, mbstate_t *__ps));
 162 extern size_t wcrtomb __P ((char *__s, wchar_t __wc, mbstate_t *__ps));
 163
 164 /* Return number of bytes in multibyte character pointed to by S.  */
 165 extern size_t __mbrlen __P ((__const char *__s, size_t __n, mbstate_t *__ps));
 166 extern size_t mbrlen __P ((__const char *__s, size_t __n, mbstate_t *__ps));
 167
 168 #if defined (__OPTIMIZE__) \
 169     && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 170 /* Define inline function as optimization.  */
 171 extern __inline size_t mbrlen (__const char *s, size_t n, mbstate_t *ps)
 172 { return ps != NULL ? __mbrtowc (NULL, s, n, ps) : __mbrlen (s, n, NULL); }
 173 #endif
 174
 175 /* Write wide character representation of multibyte character string
 176    SRC to DST.  */
 177 extern size_t __mbsrtowcs __P ((wchar_t *__dst, __const char **__src,
 178                                 size_t __len, mbstate_t *__ps));
 179 extern size_t mbsrtowcs __P ((wchar_t *__dst, __const char **__src,
 180                               size_t __len, mbstate_t *__ps));
 181
 182 /* Write multibyte character representation of wide character string
 183    SRC to DST.  */
 184 extern size_t __wcsrtombs __P ((char *__dst, __const wchar_t **__src,
 185                                 size_t __len, mbstate_t *__ps));
 186 extern size_t wcsrtombs __P ((char *__dst, __const wchar_t **__src,
 187                               size_t __len, mbstate_t *__ps));
 188
 189
 190 #ifdef  __USE_GNU
 191 /* Write wide character representation of at most NMC bytes of the
 192    multibyte character string SRC to DST.  */
 193 extern size_t __mbsnrtowcs __P ((wchar_t *__dst, __const char **__src,
 194                                  size_t __nmc, size_t __len, mbstate_t *__ps));
 195 extern size_t mbsnrtowcs __P ((wchar_t *__dst, __const char **__src,
 196                                size_t __nmc, size_t __len, mbstate_t *__ps));
 197
 198 /* Write multibyte character representation of at most NWC characters
 199    from the wide character string SRC to DST.  */
 200 extern size_t __wcsnrtombs __P ((char *__dst, __const wchar_t **__src,
 201                                  size_t __nwc, size_t __len, mbstate_t *__ps));
 202 extern size_t wcsnrtombs __P ((char *__dst, __const wchar_t **__src,
 203                                size_t __nwc, size_t __len, mbstate_t *__ps));
 204
 205
 206 /* The following functions are extensions found in X/Open CAE.  */
 207
 208 /* Determine number of column positions required for C.  */
 209 extern int wcwidth __P ((wint_t __c));
 210
 211 /* Determine number of column positions required for first N wide
 212    characters (or fewer if S ends before this) in S.  */
 213 extern int wcswidth __P ((__const wchar_t *__s, size_t __n));
 214 #endif  /* use GNU */
 215
 216
 217 /* Convert initial portion of the wide string NPTR to `double'
 218    representation.  */
 219 extern double wcstod __P ((__const wchar_t *__nptr, wchar_t **__endptr));
 220
 221 #ifdef __USE_GNU
 222 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 223 extern float wcstof __P ((__const wchar_t *__nptr, wchar_t **__endptr));
 224 extern __long_double_t wcstold __P ((__const wchar_t *__nptr,
 225                                      wchar_t **__endptr));
 226 #endif /* GNU */
 227
 228
 229 /* Convert initial portion of wide string NPTR to `long int'
 230    representation.  */
 231 extern long int wcstol __P ((__const wchar_t *__nptr, wchar_t **__endptr,
 232                              int __base));
 233
 234 /* Convert initial portion of wide string NPTR to `unsigned long int'
 235    representation.  */
 236 extern unsigned long int wcstoul __P ((__const wchar_t *__nptr,
 237                                        wchar_t **__endptr, int __base));
 238
 239 #if defined (__GNUC__) && defined (__USE_GNU)
 240 /* Convert initial portion of wide string NPTR to `long int'
 241    representation.  */
 242 extern long long int wcstoq __P ((__const wchar_t *__nptr, wchar_t **__endptr,
 243                                   int __base));
 244
 245 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 246    representation.  */
 247 extern unsigned long long int wcstouq __P ((__const wchar_t *__nptr,
 248                                             wchar_t **__endptr, int __base));
 249 #endif /* GCC and use GNU.  */
 250
 251
 252 /* The internal entry points for `wcstoX' take an extra flag argument
 253    saying whether or not to parse locale-dependent number grouping.  */
 254 extern double __wcstod_internal __P ((__const wchar_t *__nptr,
 255                                       wchar_t **__endptr, int __group));
 256 extern float __wcstof_internal __P ((__const wchar_t *__nptr,
 257                                      wchar_t **__endptr, int __group));
 258 extern __long_double_t __wcstold_internal __P ((__const wchar_t *__nptr,
 259                                                 wchar_t **__endptr,
 260                                                 int __group));
 261
 262 extern long int __wcstol_internal __P ((__const wchar_t *__nptr,
 263                                         wchar_t **__endptr, int __base,
 264                                         int __group));
 265 extern unsigned long int __wcstoul_internal __P ((__const wchar_t *__nptr,
 266                                                   wchar_t **__endptr,
 267                                                   int __base, int __group));
 268 #if defined __GNUC__ && defined __USE_GNU
 269 extern long long int __wcstoq_internal __P ((__const wchar_t *__nptr,
 270                                              wchar_t **__endptr, int __base,
 271                                              int __group));
 272 extern unsigned long long int __wcstouq_internal __P ((__const wchar_t *__nptr,
 273                                                        wchar_t **__endptr,
 274                                                        int __base,
 275                                                        int __group));
 276 #endif /* GCC and use GNU.  */
 277
 278
 279 #if defined (__OPTIMIZE__) && __GNUC__ >= 2
 280 /* Define inline functions which call the internal entry points.  */
 281
 282 extern __inline double wcstod (__const wchar_t *__nptr, wchar_t **__endptr)
 283 { return __wcstod_internal (__nptr, __endptr, 0); }
 284 extern __inline long int wcstol (__const wchar_t *__nptr,
 285                                  wchar_t **__endptr, int __base)
 286 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 287 extern __inline unsigned long int wcstoul (__const wchar_t *__nptr,
 288                                            wchar_t **__endptr, int __base)
 289 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 290
 291 #ifdef __USE_GNU
 292 extern __inline float wcstof (__const wchar_t *__nptr, wchar_t **__endptr)
 293 { return __wcstof_internal (__nptr, __endptr, 0); }
 294 extern __inline __long_double_t wcstold (__const wchar_t *__nptr,
 295                                          wchar_t **__endptr)
 296 { return __wcstold_internal (__nptr, __endptr, 0); }
 297
 298
 299 extern __inline long long int wcstoq (__const wchar_t *__nptr,
 300                                       wchar_t **__endptr, int __base)
 301 { return __wcstoq_internal (__nptr, __endptr, __base, 0); }
 302 extern __inline unsigned long long int wcstouq (__const wchar_t *__nptr,
 303                                                 wchar_t **__endptr, int __base)
 304 { return __wcstouq_internal (__nptr, __endptr, __base, 0); }
 305 #endif /* Use GNU.  */
 306 #endif /* Optimizing GCC >=2.  */
 307
 308
 309 #ifdef  __USE_GNU
 310 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 311    DEST.  */
 312 extern wchar_t *__wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 313 extern wchar_t *wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 314
 315 /* Copy no more than N characters of SRC to DEST, returning the address of
 316    the last character written into DEST.  */
 317 extern wchar_t *__wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 318                                 size_t __n));
 319 extern wchar_t *wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 320                               size_t __n));
 321 #endif  /* use GNU */
 322
 323
 324 __END_DECLS
 325
 326 #endif /* wchar.h  */