1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 5 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 6 * Copyright (c) 2002-2004 Tim J. Robbins. 7 * 8 * Copyright (c) 2011 The FreeBSD Foundation 9 * 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #include <errno.h> 37 #include <limits.h> 38 #include <stdlib.h> 39 #include <wchar.h> 40 #include "mblocal.h" 41 42 size_t 43 mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src, 44 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t locale) 45 { 46 FIX_LOCALE(locale); 47 if (ps == NULL) 48 ps = &(XLOCALE_CTYPE(locale)->mbsnrtowcs); 49 return (XLOCALE_CTYPE(locale)->__mbsnrtowcs(dst, src, nms, len, ps)); 50 } 51 size_t 52 mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 53 size_t nms, size_t len, mbstate_t * __restrict ps) 54 { 55 return mbsnrtowcs_l(dst, src, nms, len, ps, __get_locale()); 56 } 57 58 size_t 59 __mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src, 60 size_t nms, size_t len, mbstate_t * __restrict ps, 61 mbrtowc_pfn_t pmbrtowc) 62 { 63 const char *s; 64 size_t nchr; 65 wchar_t wc; 66 size_t nb; 67 68 s = *src; 69 nchr = 0; 70 71 if (dst == NULL) { 72 for (;;) { 73 if ((nb = pmbrtowc(&wc, s, nms, ps)) == (size_t)-1) 74 /* Invalid sequence - mbrtowc() sets errno. */ 75 return ((size_t)-1); 76 else if (nb == 0 || nb == (size_t)-2) 77 return (nchr); 78 s += nb; 79 nms -= nb; 80 nchr++; 81 } 82 /*NOTREACHED*/ 83 } 84 85 while (len-- > 0) { 86 if ((nb = pmbrtowc(dst, s, nms, ps)) == (size_t)-1) { 87 *src = s; 88 return ((size_t)-1); 89 } else if (nb == (size_t)-2) { 90 *src = s + nms; 91 return (nchr); 92 } else if (nb == 0) { 93 *src = NULL; 94 return (nchr); 95 } 96 s += nb; 97 nms -= nb; 98 nchr++; 99 dst++; 100 } 101 *src = s; 102 return (nchr); 103 } 104