44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* 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);
|
|
}
|
|
}
|