lib/wchar.in.h

   1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
   2
   3    Copyright (C) 2007-2010 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Eric Blake.  */
  20
  21 /*
  22  * ISO C 99 <wchar.h> for platforms that have issues.
  23  * <http://www.opengroup.org/susv3xbd/wchar.h.html>
  24  *
  25  * For now, this just ensures proper prerequisite inclusion order and
  26  * the declaration of wcwidth().
  27  */
  28
  29 #if __GNUC__ >= 3
  30 @PRAGMA_SYSTEM_HEADER@
  31 #endif
  32
  33 #if defined __need_mbstate_t || defined __need_wint_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H)) || defined _GL_ALREADY_INCLUDING_WCHAR_H
  34 /* Special invocation convention:
  35    - Inside glibc and uClibc header files.
  36    - On HP-UX 11.00 we have a sequence of nested includes
  37      <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
  38      once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>
  39      and once directly.  In both situations 'wint_t' is not yet defined,
  40      therefore we cannot provide the function overrides; instead include only
  41      the system's <wchar.h>.
  42    - On IRIX 6.5, similarly, we have an include <wchar.h> -> <wctype.h>, and
  43      the latter includes <wchar.h>.  But here, we have no way to detect whether
  44      <wctype.h> is completely included or is still being included.  */
  45
  46 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
  47
  48 #else
  49 /* Normal invocation convention.  */
  50
  51 #ifndef _GL_WCHAR_H
  52
  53 #define _GL_ALREADY_INCLUDING_WCHAR_H
  54
  55 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
  56    <wchar.h>.
  57    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
  58    included before <wchar.h>.
  59    But avoid namespace pollution on glibc systems.  */
  60 #ifndef __GLIBC__
  61 # include <stddef.h>
  62 # include <stdio.h>
  63 # include <time.h>
  64 #endif
  65
  66 /* Include the original <wchar.h> if it exists.
  67    Some builds of uClibc lack it.  */
  68 /* The include_next requires a split double-inclusion guard.  */
  69 #if @HAVE_WCHAR_H@
  70 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
  71 #endif
  72
  73 #undef _GL_ALREADY_INCLUDING_WCHAR_H
  74
  75 #ifndef _GL_WCHAR_H
  76 #define _GL_WCHAR_H
  77
  78 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  79
  80 /* The definition of _GL_ARG_NONNULL is copied here.  */
  81
  82 /* The definition of _GL_WARN_ON_USE is copied here.  */
  83
  84
  85 /* Define wint_t.  (Also done in wctype.in.h.)  */
  86 #if !@HAVE_WINT_T@ && !defined wint_t
  87 # define wint_t int
  88 # ifndef WEOF
  89 #  define WEOF -1
  90 # endif
  91 #endif
  92
  93
  94 /* Override mbstate_t if it is too small.
  95    On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
  96    implementing mbrtowc for encodings like UTF-8.  */
  97 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
  98 typedef int rpl_mbstate_t;
  99 # undef mbstate_t
 100 # define mbstate_t rpl_mbstate_t
 101 # define GNULIB_defined_mbstate_t 1
 102 #endif
 103
 104
 105 /* Convert a single-byte character to a wide character.  */
 106 #if @GNULIB_BTOWC@
 107 # if @REPLACE_BTOWC@
 108 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 109 #   undef btowc
 110 #   define btowc rpl_btowc
 111 #  endif
 112 _GL_FUNCDECL_RPL (btowc, wint_t, (int c));
 113 _GL_CXXALIAS_RPL (btowc, wint_t, (int c));
 114 # else
 115 #  if !@HAVE_BTOWC@
 116 _GL_FUNCDECL_SYS (btowc, wint_t, (int c));
 117 #  endif
 118 _GL_CXXALIAS_SYS (btowc, wint_t, (int c));
 119 # endif
 120 _GL_CXXALIASWARN (btowc);
 121 #elif defined GNULIB_POSIXCHECK
 122 # undef btowc
 123 # if HAVE_RAW_DECL_BTOWC
 124 _GL_WARN_ON_USE (btowc, "btowc is unportable - "
 125                  "use gnulib module btowc for portability");
 126 # endif
 127 #endif
 128
 129
 130 /* Convert a wide character to a single-byte character.  */
 131 #if @GNULIB_WCTOB@
 132 # if @REPLACE_WCTOB@
 133 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 134 #   undef wctob
 135 #   define wctob rpl_wctob
 136 #  endif
 137 _GL_FUNCDECL_RPL (wctob, int, (wint_t wc));
 138 _GL_CXXALIAS_RPL (wctob, int, (wint_t wc));
 139 # else
 140 #  if !defined wctob && !@HAVE_DECL_WCTOB@
 141 /* wctob is provided by gnulib, or wctob exists but is not declared.  */
 142 _GL_FUNCDECL_SYS (wctob, int, (wint_t wc));
 143 #  endif
 144 _GL_CXXALIAS_SYS (wctob, int, (wint_t wc));
 145 # endif
 146 _GL_CXXALIASWARN (wctob);
 147 #elif defined GNULIB_POSIXCHECK
 148 # undef wctob
 149 # if HAVE_RAW_DECL_WCTOB
 150 _GL_WARN_ON_USE (wctob, "wctob is unportable - "
 151                  "use gnulib module wctob for portability");
 152 # endif
 153 #endif
 154
 155
 156 /* Test whether *PS is in the initial state.  */
 157 #if @GNULIB_MBSINIT@
 158 # if @REPLACE_MBSINIT@
 159 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 160 #   undef mbsinit
 161 #   define mbsinit rpl_mbsinit
 162 #  endif
 163 _GL_FUNCDECL_RPL (mbsinit, int, (const mbstate_t *ps));
 164 _GL_CXXALIAS_RPL (mbsinit, int, (const mbstate_t *ps));
 165 # else
 166 #  if !@HAVE_MBSINIT@
 167 _GL_FUNCDECL_SYS (mbsinit, int, (const mbstate_t *ps));
 168 #  endif
 169 _GL_CXXALIAS_SYS (mbsinit, int, (const mbstate_t *ps));
 170 # endif
 171 _GL_CXXALIASWARN (mbsinit);
 172 #elif defined GNULIB_POSIXCHECK
 173 # undef mbsinit
 174 # if HAVE_RAW_DECL_MBSINIT
 175 _GL_WARN_ON_USE (mbsinit, "mbsinit is unportable - "
 176                  "use gnulib module mbsinit for portability");
 177 # endif
 178 #endif
 179
 180
 181 /* Convert a multibyte character to a wide character.  */
 182 #if @GNULIB_MBRTOWC@
 183 # if @REPLACE_MBRTOWC@
 184 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 185 #   undef mbrtowc
 186 #   define mbrtowc rpl_mbrtowc
 187 #  endif
 188 _GL_FUNCDECL_RPL (mbrtowc, size_t,
 189                   (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps));
 190 _GL_CXXALIAS_RPL (mbrtowc, size_t,
 191                   (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps));
 192 # else
 193 #  if !@HAVE_MBRTOWC@
 194 _GL_FUNCDECL_SYS (mbrtowc, size_t,
 195                   (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps));
 196 #  endif
 197 _GL_CXXALIAS_SYS (mbrtowc, size_t,
 198                   (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps));
 199 # endif
 200 _GL_CXXALIASWARN (mbrtowc);
 201 #elif defined GNULIB_POSIXCHECK
 202 # undef mbrtowc
 203 # if HAVE_RAW_DECL_MBRTOWC
 204 _GL_WARN_ON_USE (mbrtowc, "mbrtowc is unportable - "
 205                  "use gnulib module mbrtowc for portability");
 206 # endif
 207 #endif
 208
 209
 210 /* Recognize a multibyte character.  */
 211 #if @GNULIB_MBRLEN@
 212 # if @REPLACE_MBRLEN@
 213 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 214 #   undef mbrlen
 215 #   define mbrlen rpl_mbrlen
 216 #  endif
 217 _GL_FUNCDECL_RPL (mbrlen, size_t, (const char *s, size_t n, mbstate_t *ps));
 218 _GL_CXXALIAS_RPL (mbrlen, size_t, (const char *s, size_t n, mbstate_t *ps));
 219 # else
 220 #  if !@HAVE_MBRLEN@
 221 _GL_FUNCDECL_SYS (mbrlen, size_t, (const char *s, size_t n, mbstate_t *ps));
 222 #  endif
 223 _GL_CXXALIAS_SYS (mbrlen, size_t, (const char *s, size_t n, mbstate_t *ps));
 224 # endif
 225 _GL_CXXALIASWARN (mbrlen);
 226 #elif defined GNULIB_POSIXCHECK
 227 # undef mbrlen
 228 # if HAVE_RAW_DECL_MBRLEN
 229 _GL_WARN_ON_USE (mbrlen, "mbrlen is unportable - "
 230                  "use gnulib module mbrlen for portability");
 231 # endif
 232 #endif
 233
 234
 235 /* Convert a string to a wide string.  */
 236 #if @GNULIB_MBSRTOWCS@
 237 # if @REPLACE_MBSRTOWCS@
 238 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 239 #   undef mbsrtowcs
 240 #   define mbsrtowcs rpl_mbsrtowcs
 241 #  endif
 242 _GL_FUNCDECL_RPL (mbsrtowcs, size_t,
 243                   (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps)
 244                   _GL_ARG_NONNULL ((2)));
 245 _GL_CXXALIAS_RPL (mbsrtowcs, size_t,
 246                   (wchar_t *dest, const char **srcp, size_t len,
 247                    mbstate_t *ps));
 248 # else
 249 #  if !@HAVE_MBSRTOWCS@
 250 _GL_FUNCDECL_SYS (mbsrtowcs, size_t,
 251                   (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps)
 252                   _GL_ARG_NONNULL ((2)));
 253 #  endif
 254 _GL_CXXALIAS_SYS (mbsrtowcs, size_t,
 255                   (wchar_t *dest, const char **srcp, size_t len,
 256                    mbstate_t *ps));
 257 # endif
 258 _GL_CXXALIASWARN (mbsrtowcs);
 259 #elif defined GNULIB_POSIXCHECK
 260 # undef mbsrtowcs
 261 # if HAVE_RAW_DECL_MBSRTOWCS
 262 _GL_WARN_ON_USE (mbsrtowcs, "mbsrtowcs is unportable - "
 263                  "use gnulib module mbsrtowcs for portability");
 264 # endif
 265 #endif
 266
 267
 268 /* Convert a string to a wide string.  */
 269 #if @GNULIB_MBSNRTOWCS@
 270 # if @REPLACE_MBSNRTOWCS@
 271 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 272 #   undef mbsnrtowcs
 273 #   define mbsnrtowcs rpl_mbsnrtowcs
 274 #  endif
 275 _GL_FUNCDECL_RPL (mbsnrtowcs, size_t,
 276                   (wchar_t *dest, const char **srcp, size_t srclen, size_t len,
 277                    mbstate_t *ps)
 278                   _GL_ARG_NONNULL ((2)));
 279 _GL_CXXALIAS_RPL (mbsnrtowcs, size_t,
 280                   (wchar_t *dest, const char **srcp, size_t srclen, size_t len,
 281                    mbstate_t *ps));
 282 # else
 283 #  if !@HAVE_MBSNRTOWCS@
 284 _GL_FUNCDECL_SYS (mbsnrtowcs, size_t,
 285                   (wchar_t *dest, const char **srcp, size_t srclen, size_t len,
 286                    mbstate_t *ps)
 287                   _GL_ARG_NONNULL ((2)));
 288 #  endif
 289 _GL_CXXALIAS_SYS (mbsnrtowcs, size_t,
 290                   (wchar_t *dest, const char **srcp, size_t srclen, size_t len,
 291                    mbstate_t *ps));
 292 # endif
 293 _GL_CXXALIASWARN (mbsnrtowcs);
 294 #elif defined GNULIB_POSIXCHECK
 295 # undef mbsnrtowcs
 296 # if HAVE_RAW_DECL_MBSNRTOWCS
 297 _GL_WARN_ON_USE (mbsnrtowcs, "mbsnrtowcs is unportable - "
 298                  "use gnulib module mbsnrtowcs for portability");
 299 # endif
 300 #endif
 301
 302
 303 /* Convert a wide character to a multibyte character.  */
 304 #if @GNULIB_WCRTOMB@
 305 # if @REPLACE_WCRTOMB@
 306 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 307 #   undef wcrtomb
 308 #   define wcrtomb rpl_wcrtomb
 309 #  endif
 310 _GL_FUNCDECL_RPL (wcrtomb, size_t, (char *s, wchar_t wc, mbstate_t *ps));
 311 _GL_CXXALIAS_RPL (wcrtomb, size_t, (char *s, wchar_t wc, mbstate_t *ps));
 312 # else
 313 #  if !@HAVE_WCRTOMB@
 314 _GL_FUNCDECL_SYS (wcrtomb, size_t, (char *s, wchar_t wc, mbstate_t *ps));
 315 #  endif
 316 _GL_CXXALIAS_SYS (wcrtomb, size_t, (char *s, wchar_t wc, mbstate_t *ps));
 317 # endif
 318 _GL_CXXALIASWARN (wcrtomb);
 319 #elif defined GNULIB_POSIXCHECK
 320 # undef wcrtomb
 321 # if HAVE_RAW_DECL_WCRTOMB
 322 _GL_WARN_ON_USE (wcrtomb, "wcrtomb is unportable - "
 323                  "use gnulib module wcrtomb for portability");
 324 # endif
 325 #endif
 326
 327
 328 /* Convert a wide string to a string.  */
 329 #if @GNULIB_WCSRTOMBS@
 330 # if @REPLACE_WCSRTOMBS@
 331 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 332 #   undef wcsrtombs
 333 #   define wcsrtombs rpl_wcsrtombs
 334 #  endif
 335 _GL_FUNCDECL_RPL (wcsrtombs, size_t,
 336                   (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps)
 337                   _GL_ARG_NONNULL ((2)));
 338 _GL_CXXALIAS_RPL (wcsrtombs, size_t,
 339                   (char *dest, const wchar_t **srcp, size_t len,
 340                    mbstate_t *ps));
 341 # else
 342 #  if !@HAVE_WCSRTOMBS@
 343 _GL_FUNCDECL_SYS (wcsrtombs, size_t,
 344                   (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps)
 345                   _GL_ARG_NONNULL ((2)));
 346 #  endif
 347 _GL_CXXALIAS_SYS (wcsrtombs, size_t,
 348                   (char *dest, const wchar_t **srcp, size_t len,
 349                    mbstate_t *ps));
 350 # endif
 351 _GL_CXXALIASWARN (wcsrtombs);
 352 #elif defined GNULIB_POSIXCHECK
 353 # undef wcsrtombs
 354 # if HAVE_RAW_DECL_WCSRTOMBS
 355 _GL_WARN_ON_USE (wcsrtombs, "wcsrtombs is unportable - "
 356                  "use gnulib module wcsrtombs for portability");
 357 # endif
 358 #endif
 359
 360
 361 /* Convert a wide string to a string.  */
 362 #if @GNULIB_WCSNRTOMBS@
 363 # if @REPLACE_WCSNRTOMBS@
 364 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 365 #   undef wcsnrtombs
 366 #   define wcsnrtombs rpl_wcsnrtombs
 367 #  endif
 368 _GL_FUNCDECL_RPL (wcsnrtombs, size_t,
 369                   (char *dest, const wchar_t **srcp, size_t srclen, size_t len,
 370                    mbstate_t *ps)
 371                   _GL_ARG_NONNULL ((2)));
 372 _GL_CXXALIAS_RPL (wcsnrtombs, size_t,
 373                   (char *dest, const wchar_t **srcp, size_t srclen, size_t len,
 374                    mbstate_t *ps));
 375 # else
 376 #  if !@HAVE_WCSNRTOMBS@
 377 _GL_FUNCDECL_SYS (wcsnrtombs, size_t,
 378                   (char *dest, const wchar_t **srcp, size_t srclen, size_t len,
 379                    mbstate_t *ps)
 380                   _GL_ARG_NONNULL ((2)));
 381 #  endif
 382 _GL_CXXALIAS_SYS (wcsnrtombs, size_t,
 383                   (char *dest, const wchar_t **srcp, size_t srclen, size_t len,
 384                    mbstate_t *ps));
 385 # endif
 386 _GL_CXXALIASWARN (wcsnrtombs);
 387 #elif defined GNULIB_POSIXCHECK
 388 # undef wcsnrtombs
 389 # if HAVE_RAW_DECL_WCSNRTOMBS
 390 _GL_WARN_ON_USE (wcsnrtombs, "wcsnrtombs is unportable - "
 391                  "use gnulib module wcsnrtombs for portability");
 392 # endif
 393 #endif
 394
 395
 396 /* Return the number of screen columns needed for WC.  */
 397 #if @GNULIB_WCWIDTH@
 398 # if @REPLACE_WCWIDTH@
 399 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 400 #   undef wcwidth
 401 #   define wcwidth rpl_wcwidth
 402 #  endif
 403 _GL_FUNCDECL_RPL (wcwidth, int, (wchar_t));
 404 _GL_CXXALIAS_RPL (wcwidth, int, (wchar_t));
 405 # else
 406 #  if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
 407 /* wcwidth exists but is not declared.  */
 408 _GL_FUNCDECL_SYS (wcwidth, int, (wchar_t));
 409 #  endif
 410 _GL_CXXALIAS_SYS (wcwidth, int, (wchar_t));
 411 # endif
 412 _GL_CXXALIASWARN (wcwidth);
 413 #elif defined GNULIB_POSIXCHECK
 414 # undef wcwidth
 415 # if HAVE_RAW_DECL_WCWIDTH
 416 _GL_WARN_ON_USE (wcwidth, "wcwidth is unportable - "
 417                  "use gnulib module wcwidth for portability");
 418 # endif
 419 #endif
 420
 421
 422 #endif /* _GL_WCHAR_H */
 423 #endif /* _GL_WCHAR_H */
 424 #endif