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 * All rights reserved. 6 * 7 * Copyright (c) 2011 The FreeBSD Foundation 8 * All rights reserved. 9 * Portions of this software were developed by David Chisnall 10 * under sponsorship from the FreeBSD Foundation. 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 <limits.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <wchar.h> 41 #include "mblocal.h" 42 43 size_t 44 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 45 size_t len, mbstate_t * __restrict ps, locale_t locale) 46 { 47 FIX_LOCALE(locale); 48 if (ps == NULL) 49 ps = &locale->wcsnrtombs; 50 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps)); 51 } 52 size_t 53 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 54 size_t len, mbstate_t * __restrict ps) 55 { 56 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale()); 57 } 58 59 60 size_t 61 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, 62 size_t nwc, size_t len, mbstate_t * __restrict ps, 63 wcrtomb_pfn_t pwcrtomb) 64 { 65 mbstate_t mbsbak; 66 char buf[MB_LEN_MAX]; 67 const wchar_t *s; 68 size_t nbytes; 69 size_t nb; 70 71 s = *src; 72 nbytes = 0; 73 74 if (dst == NULL) { 75 while (nwc-- > 0) { 76 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) 77 /* Invalid character - wcrtomb() sets errno. */ 78 return ((size_t)-1); 79 else if (*s == L'\0') 80 return (nbytes + nb - 1); 81 s++; 82 nbytes += nb; 83 } 84 return (nbytes); 85 } 86 87 while (len > 0 && nwc-- > 0) { 88 if (len > (size_t)MB_CUR_MAX) { 89 /* Enough space to translate in-place. */ 90 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) { 91 *src = s; 92 return ((size_t)-1); 93 } 94 } else { 95 /* 96 * May not be enough space; use temp. buffer. 97 * 98 * We need to save a copy of the conversion state 99 * here so we can restore it if the multibyte 100 * character is too long for the buffer. 101 */ 102 mbsbak = *ps; 103 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) { 104 *src = s; 105 return ((size_t)-1); 106 } 107 if (nb > (int)len) { 108 /* MB sequence for character won't fit. */ 109 *ps = mbsbak; 110 break; 111 } 112 memcpy(dst, buf, nb); 113 } 114 if (*s == L'\0') { 115 *src = NULL; 116 return (nbytes + nb - 1); 117 } 118 s++; 119 dst += nb; 120 len -= nb; 121 nbytes += nb; 122 } 123 *src = s; 124 return (nbytes); 125 } 126