| 1 | /* Convert multibyte character to wide character. |
| 2 | Copyright (C) 2011-2014 Free Software Foundation, Inc. |
| 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 | } |