1 /* Convert wide character to multibyte character. 2 Copyright (C) 2008 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno (at) 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 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 General Public License for more details. 14 15 You should have received a copy of the GNU 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 } 54
