Commit | Line | Data |
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eb4a14ed | 1 | /* Convert multibyte character to wide character. |
af07e104 | 2 | Copyright (C) 2011-2013 Free Software Foundation, Inc. |
eb4a14ed LC |
3 | Written by Bruno Haible <bruno@clisp.org>, 2011. |
4 | ||
5 | This program is free software: you can redistribute it and/or modify | |
6 | it under the terms of the GNU Lesser General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | /* We don't need a static internal state, because the encoding is not state | |
19 | dependent, and when mbrtowc returns (size_t)(-2). we throw the result | |
20 | away. */ | |
21 | ||
22 | int | |
23 | mbtowc (wchar_t *pwc, const char *s, size_t n) | |
24 | { | |
25 | if (s == NULL) | |
26 | return 0; | |
27 | else | |
28 | { | |
29 | mbstate_t state; | |
30 | wchar_t wc; | |
31 | size_t result; | |
32 | ||
33 | memset (&state, 0, sizeof (mbstate_t)); | |
34 | result = mbrtowc (&wc, s, n, &state); | |
35 | if (result == (size_t)-1 || result == (size_t)-2) | |
36 | { | |
37 | errno = EILSEQ; | |
38 | return -1; | |
39 | } | |
40 | if (pwc != NULL) | |
41 | *pwc = wc; | |
42 | return (wc == 0 ? 0 : result); | |
43 | } | |
44 | } |