1*820c1a8dSHiroo HAYASHI /* Convert multibyte character to wide character.
2*820c1a8dSHiroo HAYASHI Copyright (C) 2011-2021 Free Software Foundation, Inc.
3*820c1a8dSHiroo HAYASHI Written by Bruno Haible <bruno@clisp.org>, 2011.
4*820c1a8dSHiroo HAYASHI
5*820c1a8dSHiroo HAYASHI This file is free software: you can redistribute it and/or modify
6*820c1a8dSHiroo HAYASHI it under the terms of the GNU Lesser General Public License as
7*820c1a8dSHiroo HAYASHI published by the Free Software Foundation; either version 2.1 of the
8*820c1a8dSHiroo HAYASHI License, or (at your option) any later version.
9*820c1a8dSHiroo HAYASHI
10*820c1a8dSHiroo HAYASHI This file is distributed in the hope that it will be useful,
11*820c1a8dSHiroo HAYASHI but WITHOUT ANY WARRANTY; without even the implied warranty of
12*820c1a8dSHiroo HAYASHI MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13*820c1a8dSHiroo HAYASHI GNU Lesser General Public License for more details.
14*820c1a8dSHiroo HAYASHI
15*820c1a8dSHiroo HAYASHI You should have received a copy of the GNU Lesser General Public License
16*820c1a8dSHiroo HAYASHI along with this program. If not, see <https://www.gnu.org/licenses/>. */
17*820c1a8dSHiroo HAYASHI
18*820c1a8dSHiroo HAYASHI /* We don't need a static internal state, because the encoding is not state
19*820c1a8dSHiroo HAYASHI dependent, and when mbrtowc returns (size_t)(-2). we throw the result
20*820c1a8dSHiroo HAYASHI away. */
21*820c1a8dSHiroo HAYASHI
22*820c1a8dSHiroo HAYASHI int
mbtowc(wchar_t * pwc,const char * s,size_t n)23*820c1a8dSHiroo HAYASHI mbtowc (wchar_t *pwc, const char *s, size_t n)
24*820c1a8dSHiroo HAYASHI {
25*820c1a8dSHiroo HAYASHI if (s == NULL)
26*820c1a8dSHiroo HAYASHI return 0;
27*820c1a8dSHiroo HAYASHI else
28*820c1a8dSHiroo HAYASHI {
29*820c1a8dSHiroo HAYASHI mbstate_t state;
30*820c1a8dSHiroo HAYASHI wchar_t wc;
31*820c1a8dSHiroo HAYASHI size_t result;
32*820c1a8dSHiroo HAYASHI
33*820c1a8dSHiroo HAYASHI memset (&state, 0, sizeof (mbstate_t));
34*820c1a8dSHiroo HAYASHI result = mbrtowc (&wc, s, n, &state);
35*820c1a8dSHiroo HAYASHI if (result == (size_t)-1 || result == (size_t)-2)
36*820c1a8dSHiroo HAYASHI {
37*820c1a8dSHiroo HAYASHI errno = EILSEQ;
38*820c1a8dSHiroo HAYASHI return -1;
39*820c1a8dSHiroo HAYASHI }
40*820c1a8dSHiroo HAYASHI if (pwc != NULL)
41*820c1a8dSHiroo HAYASHI *pwc = wc;
42*820c1a8dSHiroo HAYASHI return (wc == 0 ? 0 : result);
43*820c1a8dSHiroo HAYASHI }
44*820c1a8dSHiroo HAYASHI }
45