| 1 | /* Convert wide character to multibyte character. |
| 2 | Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| 3 | Written by Bruno Haible <bruno@clisp.org>, 2008. |
| 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 | #include <config.h> |
| 19 | |
| 20 | /* Specification. */ |
| 21 | #include <wchar.h> |
| 22 | |
| 23 | #include <errno.h> |
| 24 | #include <stdlib.h> |
| 25 | |
| 26 | |
| 27 | size_t |
| 28 | wcrtomb (char *s, wchar_t wc, mbstate_t *ps) |
| 29 | { |
| 30 | /* This implementation of wcrtomb on top of wctomb() supports only |
| 31 | stateless encodings. ps must be in the initial state. */ |
| 32 | if (ps != NULL && !mbsinit (ps)) |
| 33 | { |
| 34 | errno = EINVAL; |
| 35 | return (size_t)(-1); |
| 36 | } |
| 37 | |
| 38 | if (s == NULL) |
| 39 | /* We know the NUL wide character corresponds to the NUL character. */ |
| 40 | return 1; |
| 41 | else |
| 42 | { |
| 43 | int ret = wctomb (s, wc); |
| 44 | |
| 45 | if (ret >= 0) |
| 46 | return ret; |
| 47 | else |
| 48 | { |
| 49 | errno = EILSEQ; |
| 50 | return (size_t)(-1); |
| 51 | } |
| 52 | } |
| 53 | } |