1 /* 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 /* 28 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 29 * Use is subject to license terms. 30 */ 31 32 #include "lint.h" 33 #include <stdlib.h> 34 #include <wchar.h> 35 #include "mblocal.h" 36 37 int 38 mbtowc(wchar_t *_RESTRICT_KYWD pwc, const char *_RESTRICT_KYWD s, size_t n) 39 { 40 static const mbstate_t initial = { 0 }; 41 static mbstate_t mbs; 42 size_t rval; 43 44 if (s == NULL) { 45 /* No support for state dependent encodings. */ 46 mbs = initial; 47 return (0); 48 } 49 rval = __mbrtowc(pwc, s, n, &mbs); 50 if (rval == (size_t)-1 || rval == (size_t)-2) 51 return (-1); 52 return ((int)rval); 53 } 54