1 /*- 2 * Copyright 2013 Garrett D'Amore <garrett@damore.org> 3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 4 * Copyright (c) 2002-2004 Tim J. Robbins. 5 * 6 * Copyright (c) 2011 The FreeBSD Foundation 7 * All rights reserved. 8 * Portions of this software were developed by David Chisnall 9 * under sponsorship from the FreeBSD Foundation. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include <errno.h> 38 #include <limits.h> 39 #include <stdlib.h> 40 #include <wchar.h> 41 #include "mblocal.h" 42 43 size_t 44 mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src, 45 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t locale) 46 { 47 FIX_LOCALE(locale); 48 if (ps == NULL) 49 ps = &locale->mbsnrtowcs; 50 return (XLOCALE_CTYPE(locale)->__mbsnrtowcs(dst, src, nms, len, ps)); 51 } 52 size_t 53 mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 54 size_t nms, size_t len, mbstate_t * __restrict ps) 55 { 56 return mbsnrtowcs_l(dst, src, nms, len, ps, __get_locale()); 57 } 58 59 size_t 60 __mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src, 61 size_t nms, size_t len, mbstate_t * __restrict ps, 62 mbrtowc_pfn_t pmbrtowc) 63 { 64 const char *s; 65 size_t nchr; 66 wchar_t wc; 67 size_t nb; 68 69 s = *src; 70 nchr = 0; 71 72 if (dst == NULL) { 73 for (;;) { 74 if ((nb = pmbrtowc(&wc, s, nms, ps)) == (size_t)-1) 75 /* Invalid sequence - mbrtowc() sets errno. */ 76 return ((size_t)-1); 77 else if (nb == 0 || nb == (size_t)-2) 78 return (nchr); 79 s += nb; 80 nms -= nb; 81 nchr++; 82 } 83 /*NOTREACHED*/ 84 } 85 86 while (len-- > 0) { 87 if ((nb = pmbrtowc(dst, s, nms, ps)) == (size_t)-1) { 88 *src = s; 89 return ((size_t)-1); 90 } else if (nb == (size_t)-2) { 91 *src = s + nms; 92 return (nchr); 93 } else if (nb == 0) { 94 *src = NULL; 95 return (nchr); 96 } 97 s += nb; 98 nms -= nb; 99 nchr++; 100 dst++; 101 } 102 *src = s; 103 return (nchr); 104 } 105