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/* Convert unibyte character to wide character.
Copyright (C) 2008, 2010-2025 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;
mbszero (&state);
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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