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 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/* 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 22int 23mbtowc (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} 45