lib/mbsrtoc32s.c

   1 /* Convert string to 32-bit wide string.
   2    Copyright (C) 2020-2024 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2020.
   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 2.1 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 #define IN_MBSRTOC32S
  21 /* Specification.  */
  22 #include <uchar.h>
  23
  24 #include <wchar.h>
  25
  26 #if (HAVE_WORKING_MBRTOC32 && !_GL_WCHAR_T_IS_UCS4) || (GL_CHAR32_T_IS_UNICODE && GL_CHAR32_T_VS_WCHAR_T_NEEDS_CONVERSION) || _GL_SMALL_WCHAR_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 <limits.h>
  32 # include <stdlib.h>
  33
  34 # include "strnlen1.h"
  35
  36 extern mbstate_t _gl_mbsrtoc32s_state;
  37
  38 # define FUNC mbsrtoc32s
  39 # define DCHAR_T char32_t
  40 # define INTERNAL_STATE _gl_mbsrtoc32s_state
  41 # define MBRTOWC mbrtoc32
  42 # if GNULIB_MBRTOC32_REGULAR
  43    /* If the 'mbrtoc32-regular' module is in use, we don't need to handle
  44       a (size_t)(-3) return value from mbrtoc32.  */
  45 #  define USES_C32 0
  46 # else
  47 #  define USES_C32 1
  48 # endif
  49 # include "mbsrtowcs-impl.h"
  50
  51 #else
  52 /* char32_t and wchar_t are equivalent.  */
  53
  54 static_assert (sizeof (char32_t) == sizeof (wchar_t));
  55
  56 # if _GL_WCHAR_T_IS_UCS4
  57 _GL_EXTERN_INLINE
  58 # endif
  59 size_t
  60 mbsrtoc32s (char32_t *dest, const char **srcp, size_t len, mbstate_t *ps)
  61 {
  62   return mbsrtowcs ((wchar_t *) dest, srcp, len, ps);
  63 }
  64
  65 #endif