1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: head/lib/libc/locale/mblen.c 227753 2011-11-20 14:45:42Z theraven $ 32 */ 33 34 35 #include <stdlib.h> 36 #include <wchar.h> 37 #include "mblocal.h" 38 39 int 40 mblen_l(const char *s, size_t n, locale_t locale) 41 { 42 static const mbstate_t initial; 43 size_t rval; 44 FIX_LOCALE(locale); 45 46 if (s == NULL) { 47 /* No support for state dependent encodings. */ 48 locale->mblen = initial; 49 return (0); 50 } 51 rval = XLOCALE_CTYPE(locale)->__mbrtowc(NULL, s, n, &locale->mblen); 52 if (rval == (size_t)-1 || rval == (size_t)-2) 53 return (-1); 54 return ((int)rval); 55 } 56 57 int 58 mblen(const char *s, size_t n) 59 { 60 return mblen_l(s, n, __get_locale()); 61 } 62