kc3-lang/gnulib/lib/btowc.c

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• Hash : 11fe27f7
  Author :
  Date : 2023-03-30T13:25:20
  

  btowc: Fix behaviour in the C locale.
  
  * lib/btowc.c: Include <string.h>
  (btowc): Use mbrtowc instead of mbtowc when possible.
  * m4/btowc.m4 (gl_FUNC_BTOWC): Test for the mingw bug in the C locale.
  Invoke gl_MBRTOWC_C_LOCALE. If mbrtowc is buggy in the C locale,
  override also btowc.
  (gl_PREREQ_BTOWC): Test whether mbrtowc exists.
  * modules/btowc (Files): Add m4/mbrtowc.m4.
  (Depends-on): Add mbrtowc.
  * tests/test-btowc.c (main): Add a test of the C locale, based on
  tests/test-mbrtowc.c.
  * tests/test-btowc3.sh: New file, based on tests/test-mbrtowc5.sh.
  * modules/btowc-tests (Files): Add it.
  (Makefile.am): Test it.
  * doc/posix-functions/btowc.texi: Mention the two C locale behaviour
  bugs and that they are worked around.
  

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• lib/btowc.c

• /* Convert unibyte character to wide character.
     Copyright (C) 2008, 2010-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2008.
  
     This file is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as
     published by the Free Software Foundation; either version 2.1 of the
     License, or (at your option) any later version.
  
     This file is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <wchar.h>
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  
  wint_t
  btowc (int c)
  {
    if (c != EOF)
      {
        char buf[1];
        wchar_t wc;
  
        buf[0] = c;
  #if HAVE_MBRTOWC
        mbstate_t state;
        memset (&state, 0, sizeof (mbstate_t));
        size_t ret = mbrtowc (&wc, buf, 1, &state);
        if (!(ret == (size_t)(-1) || ret == (size_t)(-2)))
  #else
        if (mbtowc (&wc, buf, 1) >= 0)
  #endif
          return wc;
      }
    return WEOF;
  }
  

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