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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 /*
  20  *      ISO Standard: 7.16.4 General wide-string utilities      <wchar.h>
  21  */
  22
  23 #ifndef _WCHAR_H
  24
  25 #define _WCHAR_H 1
  26 #include <features.h>
  27
  28 __BEGIN_DECLS
  29
  30 /* Get size_t, wchar_t, wint_t and NULL from <stddef.h>.  */
  31 #define __need_size_t
  32 #define __need_wchar_t
  33 #define __need_wint_t
  34 #define __need_NULL
  35 #include <stddef.h>
  36
  37
  38 /* We try to get wint_t from <stddef.h>, but not all GCC versions define it
  39    there.  So define it ourselves if it remains undefined.  */
  40 #ifndef _WINT_T
  41 /* Integral type unchanged by default argument promotions that can
  42    hold any value corresponding to members of the extended character
  43    set, as well as at least one value that does not correspond to any
  44    member of the extended character set.  */
  45 #define _WINT_T
  46 typedef unsigned int wint_t;
  47 #endif
  48
  49
  50 /* Conversion state information.  */
  51 typedef struct
  52 {
  53   int count;            /* Number of bytes needed for the current character. */
  54   wint_t value;         /* Value so far.  */
  55 } mbstate_t;
  56
  57 #define WCHAR_MIN ((wchar_t) 0)
  58 #define WCHAR_MAX (~WCHAR_MIN)
  59
  60 #ifndef WEOF
  61 # define WEOF (0xffffffffu)
  62 #endif
  63
  64
  65 /* Copy SRC to DEST.  */
  66 extern wchar_t *wcscpy __P ((wchar_t *__dest, __const wchar_t *__src));
  67 /* Copy no more than N wide-characters of SRC to DEST.  */
  68 extern wchar_t *wcsncpy __P ((wchar_t *__dest, __const wchar_t *__src,
  69                               size_t __n));
  70
  71 /* Append SRC onto DEST.  */
  72 extern wchar_t *wcscat __P ((wchar_t *__dest, __const wchar_t *__src));
  73 /* Append no more than N wide-characters of SRC onto DEST.  */
  74 extern wchar_t *wcsncat __P ((wchar_t *__dest, __const wchar_t *__src,
  75                               size_t __n));
  76
  77 /* Compare S1 and S2.  */
  78 extern int wcscmp __P ((__const wchar_t *__s1, __const wchar_t *__s2));
  79 /* Compare N wide-characters of S1 and S2.  */
  80 extern int wcsncmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
  81                          size_t __n));
  82
  83 /* Compare S1 and S2, both interpreted as appropriate to the
  84    LC_COLLATE category of the current locale.  */
  85 extern int wcscoll __P ((__const wchar_t *__s1, __const wchar_t *__s2));
  86 /* Transform S2 into array pointed to by S1 such that if wcscmp is
  87    applied to two transformed strings the result is the as applying
  88    `wcscoll' to the original strings.  */
  89 extern size_t wcsxfrm __P ((wchar_t *__s1, __const wchar_t *__s2, size_t __n));
  90
  91 /* Duplicate S, returning an identical malloc'd string.  */
  92 extern wchar_t *wcsdup __P ((__const wchar_t *__s));
  93
  94 /* Find the first occurence of WC in WCS.  */
  95 extern wchar_t *wcschr __P ((__const wchar_t *__wcs, wchar_t __wc));
  96 /* Find the last occurence of WC in WCS.  */
  97 extern wchar_t *wcsrchr __P ((__const wchar_t *__wcs, wchar_t __wc));
  98
  99 /* Return the length of the initial segmet of WCS which
 100    consists entirely of wide-characters not in REJECT.  */
 101 extern size_t wcscspn __P ((__const wchar_t *__wcs,
 102                             __const wchar_t *__reject));
 103 /* Return the length of the initial segmet of WCS which
 104    consists entirely of wide-characters in  ACCEPT.  */
 105 extern size_t wcsspn __P ((__const wchar_t *__wcs, __const wchar_t *__accept));
 106 /* Find the first occurence in WCS of any character in ACCEPT.  */
 107 extern wchar_t *wcspbrk __P ((__const wchar_t *__wcs,
 108                               __const wchar_t *__accept));
 109 /* Find the first occurence of NEEDLE in HAYSTACK.  */
 110 extern wchar_t *wcsstr __P ((__const wchar_t *__haystack,
 111                              __const wchar_t *__needle));
 112 /* Divide WCS into tokens separated by characters in DELIM.  */
 113 extern wchar_t *wcstok __P ((wchar_t *__s, __const wchar_t *__delim,
 114                              wchar_t **ptr));
 115
 116 /* Return the number of wide-characters in S.  */
 117 extern size_t wcslen __P ((__const wchar_t *__s));
 118
 119
 120 /* Search N bytes of S for C.  */
 121 extern wchar_t *wmemchr __P ((__const wchar_t *__s, wchar_t __c, size_t __n));
 122
 123 /* Compare N bytes of S1 and S2.  */
 124 extern int wmemcmp __P ((__const wchar_t *__s1, __const wchar_t *__s2,
 125                          size_t __n));
 126
 127 /* Copy N bytes of SRC to DEST.  */
 128 extern wchar_t *wmemcpy __P ((wchar_t *__s1, __const wchar_t *__s2,
 129                               size_t __n));
 130
 131 /* Copy N bytes of SRC to DEST, guaranteeing
 132    correct behavior for overlapping strings.  */
 133 extern wchar_t *wmemmove __P ((wchar_t *__s1, __const wchar_t *__s2,
 134                                size_t __N));
 135
 136 /* Set N bytes of S to C.  */
 137 extern wchar_t *wmemset __P ((wchar_t *__s, wchar_t __c, size_t __n));
 138
 139
 140 /* Determine whether C constitutes a valid (one-byte) multibyte
 141    character.  */
 142 extern wint_t btowc __P ((int __c));
 143
 144 /* Determine whether C corresponds to a member of the extended
 145    character set whose multibyte representation is a single byte.  */
 146 extern int wctob __P ((wint_t __c));
 147
 148 /* Determine whether PS points to an object representing the initial
 149    state.  */
 150 extern int mbsinit __P ((__const mbstate_t *__ps));
 151
 152 /* Write wide character representation of multibyte character pointed
 153    to by S to PWC.  */
 154 extern size_t mbrtowc __P ((wchar_t *__pwc, __const char *__s, size_t __n,
 155                             mbstate_t *__p));
 156
 157 /* Write multibyte representation of wide character WC to S.  */
 158 extern size_t wcrtomb __P ((char *__s, wchar_t __wc, mbstate_t *__ps));
 159
 160 /* Return number of bytes in multibyte character pointed to by S.  */
 161 extern size_t __mbrlen __P ((__const char *__s, size_t __n, mbstate_t *__ps));
 162 extern size_t mbrlen __P ((__const char *__s, size_t __n, mbstate_t *__ps));
 163
 164 #if defined (__OPTIMIZE__) \
 165     && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
 166 /* Define inline function as optimization.  */
 167 extern __inline size_t mbrlen (__const char *s, size_t n, mbstate_t *ps)
 168 { return ps != NULL ? mbrtowc (NULL, s, n, ps) : __mbrlen (s, n, NULL); }
 169 #endif
 170
 171 /* Write wide character representation of multibyte chracter string SRC
 172    to DST.  */
 173 extern size_t mbsrtowcs __P ((wchar_t *__dst, __const char **__src,
 174                               size_t __len, mbstate_t *__ps));
 175
 176 /* Write multibyte character representation of wide character string
 177    SRC to DST.  */
 178 extern size_t wcsrtombs __P ((char *__dst, __const wchar_t **__src,
 179                               size_t __len, mbstate_t *__ps));
 180
 181
 182 #ifdef  __USE_GNU
 183 /* The following functions are extensions found in X/Open CAE.  */
 184
 185 /* Determine number of column positions required for C.  */
 186 extern int wcwidth __P ((wint_t __c));
 187
 188 /* Determine number of column positions required for first N wide
 189    characters (or fewer if S ends before this) in S.  */
 190 extern int wcswidth __P ((__const wchar_t *__s, size_t __n));
 191 #endif  /* use GNU */
 192
 193
 194 /* Convert initial portion of the wide string NPTR to `double'
 195    representation.  */
 196 extern double wcstod __P ((__const wchar_t *__nptr, wchar_t **__endptr));
 197
 198 #ifdef __USE_GNU
 199 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 200 extern float wcstof __P ((__const wchar_t *__nptr, wchar_t **__endptr));
 201 extern __long_double_t wcstold __P ((__const wchar_t *__nptr,
 202                                      wchar_t **__endptr));
 203 #endif /* GNU */
 204
 205
 206 /* Convert initial portion of wide string NPTR to `long int'
 207    representation.  */
 208 extern long int wcstol __P ((__const wchar_t *__nptr, wchar_t **__endptr,
 209                              int __base));
 210
 211 /* Convert initial portion of wide string NPTR to `unsigned long int'
 212    representation.  */
 213 extern unsigned long int wcstoul __P ((__const wchar_t *__nptr,
 214                                        wchar_t **__endptr, int __base));
 215
 216 #if defined (__GNUC__) && defined (__USE_GNU)
 217 /* Convert initial portion of wide string NPTR to `long int'
 218    representation.  */
 219 extern long long int wcstoq __P ((__const wchar_t *__nptr, wchar_t **__endptr,
 220                                   int __base));
 221
 222 /* Convert initial portion of wide string NPTR to `unsigned long long int'
 223    representation.  */
 224 extern unsigned long long int wcstouq __P ((__const wchar_t *__nptr,
 225                                             wchar_t **__endptr, int __base));
 226 #endif /* GCC and use GNU.  */
 227
 228
 229 /* The internal entry points for `wcstoX' take an extra flag argument
 230    saying whether or not to parse locale-dependent number grouping.  */
 231 extern double __wcstod_internal __P ((__const wchar_t *__nptr,
 232                                       wchar_t **_endptr, int __group));
 233 extern float __wcstof_internal __P ((__const wchar_t *__nptr,
 234                                      wchar_t **_endptr, int __group));
 235 extern __long_double_t __wcstold_internal __P ((__const wchar_t *__nptr,
 236                                                 wchar_t **_endptr,
 237                                                 int __group));
 238
 239 extern long int __wcstol_internal __P ((__const wchar_t *__nptr,
 240                                         wchar_t **__endptr, int __base,
 241                                         int __group));
 242 extern unsigned long int __wcstoul_internal __P ((__const wchar_t *__nptr,
 243                                                   wchar_t **__endptr,
 244                                                   int __base, int __group));
 245 #ifdef __GNUC__
 246 extern long long int __wcstoq_internal __P ((__const wchar_t *__nptr,
 247                                              wchar_t **__endptr, int __base,
 248                                              int __group));
 249 extern unsigned long long int __wcstouq_internal __P ((__const wchar_t *__nptr,
 250                                                        wchar_t **__endptr,
 251                                                        int __base,
 252                                                        int __group));
 253 #endif /* GCC */
 254
 255
 256 #if defined (__OPTIMIZE__) && __GNUC__ >= 2
 257 /* Define inline functions which call the internal entry points.  */
 258
 259 extern __inline double wcstod (__const wchar_t *__nptr, wchar_t **__endptr)
 260 { return __wcstod_internal (__nptr, __endptr, 0); }
 261 extern __inline long int wcstol (__const wchar_t *__nptr,
 262                                  wchar_t **__endptr, int __base)
 263 { return __wcstol_internal (__nptr, __endptr, __base, 0); }
 264 extern __inline unsigned long int wcstoul (__const wchar_t *__nptr,
 265                                            wchar_t **__endptr, int __base)
 266 { return __wcstoul_internal (__nptr, __endptr, __base, 0); }
 267
 268 #ifdef __USE_GNU
 269 extern __inline float wcstof (__const wchar_t *__nptr, wchar_t **__endptr)
 270 { return __wcstof_internal (__nptr, __endptr, 0); }
 271 extern __inline __long_double_t wcstold (__const wchar_t *__nptr,
 272                                          wchar_t **__endptr)
 273 { return __wcstold_internal (__nptr, __endptr, 0); }
 274 #endif
 275
 276 #ifdef __USE_BSD
 277 extern __inline long long int wcstoq (__const wchar_t *__nptr,
 278                                       wchar_t **__endptr, int __base)
 279 { return __wcstoq_internal (__nptr, __endptr, __base, 0); }
 280 extern __inline unsigned long long int wcstouq (__const wchar_t *__nptr,
 281                                                 wchar_t **__endptr, int __base)
 282 { return __wcstouq_internal (__nptr, __endptr, __base, 0); }
 283 #endif
 284 #endif /* Optimizing GCC >=2.  */
 285
 286
 287 #ifdef  __USE_GNU
 288 /* Copy SRC to DEST, returning the address of the terminating L'\0' in
 289    DEST.  */
 290 extern wchar_t *__wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 291 extern wchar_t *wcpcpy __P ((wchar_t *__dest, __const wchar_t *__src));
 292
 293 /* Copy no more than N characters of SRC to DEST, returning the address of
 294    the last character written into DEST.  */
 295 extern wchar_t *__wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 296                                 size_t __n));
 297 extern wchar_t *wcpncpy __P ((wchar_t *__dest, __const wchar_t *__src,
 298                               size_t __n));
 299 #endif  /* use GNU */
 300
 301
 302 __END_DECLS
 303
 304 #endif /* wchar.h  */