lib/c32snrtombs.c

   1 /* Convert 32-bit wide string to string.
   2    Copyright (C) 2020 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2020.  */
  18
  19 #include <config.h>
  20
  21 /* Specification.  */
  22 #include <uchar.h>
  23
  24 #include <wchar.h>
  25
  26 #if (HAVE_WORKING_MBRTOC32 && !defined __GLIBC__) || _GL_LARGE_CHAR32_T
  27 /* The char32_t encoding of a multibyte character may be different than its
  28    wchar_t encoding, or char32_t is wider than wchar_t.  */
  29
  30 # include <errno.h>
  31 # include <stdlib.h>
  32 # include <string.h>
  33
  34 extern mbstate_t _gl_c32srtombs_state;
  35
  36 # define FUNC c32snrtombs
  37 # define SCHAR_T char32_t
  38 # define INTERNAL_STATE _gl_c32srtombs_state
  39 # define WCRTOMB c32rtomb
  40 # include "wcsnrtombs-impl.h"
  41
  42 #else
  43 /* char32_t and wchar_t are equivalent.  */
  44
  45 # include "verify.h"
  46
  47 verify (sizeof (char32_t) == sizeof (wchar_t));
  48
  49 size_t
  50 c32snrtombs (char *dest, const char32_t **srcp, size_t srclen, size_t len,
  51              mbstate_t *ps)
  52 {
  53   return wcsnrtombs (dest, (const wchar_t **) srcp, srclen, len, ps);
  54 }
  55
  56 #endif