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 * All rights reserved. 8 * 9 * Copyright (c) 2011 The FreeBSD Foundation 10 * 11 * Portions of this software were developed by David Chisnall 12 * under sponsorship from the FreeBSD Foundation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <limits.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <wchar.h> 40 #include "mblocal.h" 41 42 size_t 43 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 44 size_t len, mbstate_t * __restrict ps, locale_t locale) 45 { 46 FIX_LOCALE(locale); 47 if (ps == NULL) 48 ps = &(XLOCALE_CTYPE(locale)->wcsnrtombs); 49 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps)); 50 } 51 size_t 52 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 53 size_t len, mbstate_t * __restrict ps) 54 { 55 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale()); 56 } 57 58 59 size_t 60 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, 61 size_t nwc, size_t len, mbstate_t * __restrict ps, 62 wcrtomb_pfn_t pwcrtomb) 63 { 64 mbstate_t mbsbak; 65 char buf[MB_LEN_MAX]; 66 const wchar_t *s; 67 size_t nbytes; 68 size_t nb; 69 70 s = *src; 71 nbytes = 0; 72 73 if (dst == NULL) { 74 while (nwc-- > 0) { 75 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) 76 /* Invalid character - wcrtomb() sets errno. */ 77 return ((size_t)-1); 78 else if (*s == L'\0') 79 return (nbytes + nb - 1); 80 s++; 81 nbytes += nb; 82 } 83 return (nbytes); 84 } 85 86 while (len > 0 && nwc-- > 0) { 87 if (len > (size_t)MB_CUR_MAX) { 88 /* Enough space to translate in-place. */ 89 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) { 90 *src = s; 91 return ((size_t)-1); 92 } 93 } else { 94 /* 95 * May not be enough space; use temp. buffer. 96 * 97 * We need to save a copy of the conversion state 98 * here so we can restore it if the multibyte 99 * character is too long for the buffer. 100 */ 101 mbsbak = *ps; 102 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) { 103 *src = s; 104 return ((size_t)-1); 105 } 106 if (nb > (int)len) { 107 /* MB sequence for character won't fit. */ 108 *ps = mbsbak; 109 break; 110 } 111 memcpy(dst, buf, nb); 112 } 113 if (*s == L'\0') { 114 *src = NULL; 115 return (nbytes + nb - 1); 116 } 117 s++; 118 dst += nb; 119 len -= nb; 120 nbytes += nb; 121 } 122 *src = s; 123 return (nbytes); 124 } 125