lib/wcsrtombs.c

   1 /* Convert wide string to string.
   2    Copyright (C) 2008, 2010-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2008.
   4
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation, either version 3 of the
   8    License, or (at your option) any later version.
   9
  10    This file 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, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include <wchar.h>
  22
  23 extern mbstate_t _gl_wcsrtombs_state;
  24
  25 #if HAVE_WCSRTOMBS && !WCSRTOMBS_TERMINATION_BUG && !defined GNULIB_defined_mbstate_t
  26 /* Override the system's wcsrtombs() function.  */
  27
  28 # undef wcsrtombs
  29
  30 size_t
  31 rpl_wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps)
  32 {
  33   if (ps == NULL)
  34     ps = &_gl_wcsrtombs_state;
  35 # if WCSRTOMBS_NULL_ARG_BUG
  36   if (dest == NULL)
  37     {
  38       const wchar_t *temp_src = *srcp;
  39
  40       return wcsrtombs (NULL, &temp_src, (size_t)-1, ps);
  41     }
  42   else
  43 # endif
  44     return wcsrtombs (dest, srcp, len, ps);
  45 }
  46
  47 #else
  48 /* Implement wcsrtombs on top of wcrtomb().  */
  49
  50 # include <errno.h>
  51 # include <stdlib.h>
  52 # include <string.h>
  53
  54 # define FUNC wcsrtombs
  55 # define SCHAR_T wchar_t
  56 # define INTERNAL_STATE _gl_wcsrtombs_state
  57 # define WCRTOMB wcrtomb
  58 # include "wcsrtombs-impl.h"
  59
  60 #endif