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/* Convert multibyte character to wide character.
Copyright (C) 2011-2023 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2011.
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/>. */
/* We don't need a static internal state, because the encoding is not state
dependent, and when mbrtowc returns (size_t)(-2). we throw the result
away. */
int
mbtowc (wchar_t *pwc, const char *s, size_t n)
{
if (s == NULL)
return 0;
else
{
mbstate_t state;
wchar_t wc;
size_t result;
memset (&state, 0, sizeof (mbstate_t));
result = mbrtowc (&wc, s, n, &state);
if (result == (size_t)-1 || result == (size_t)-2)
{
errno = EILSEQ;
return -1;
}
if (pwc != NULL)
*pwc = wc;
return (wc == 0 ? 0 : result);
}
}
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