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 <limits.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <wchar.h> 38 #include "mblocal.h" 39 40 size_t 41 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 42 size_t len, mbstate_t * __restrict ps, locale_t locale) 43 { 44 FIX_LOCALE(locale); 45 if (ps == NULL) 46 ps = &locale->wcsnrtombs; 47 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps)); 48 } 49 size_t 50 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 51 size_t len, mbstate_t * __restrict ps) 52 { 53 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale()); 54 } 55 56 57 size_t 58 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, 59 size_t nwc, size_t len, mbstate_t * __restrict ps, 60 wcrtomb_pfn_t pwcrtomb) 61 { 62 mbstate_t mbsbak; 63 char buf[MB_LEN_MAX]; 64 const wchar_t *s; 65 size_t nbytes; 66 size_t nb; 67 68 s = *src; 69 nbytes = 0; 70 71 if (dst == NULL) { 72 while (nwc-- > 0) { 73 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) 74 /* Invalid character - wcrtomb() sets errno. */ 75 return ((size_t)-1); 76 else if (*s == L'\0') 77 return (nbytes + nb - 1); 78 s++; 79 nbytes += nb; 80 } 81 return (nbytes); 82 } 83 84 while (len > 0 && nwc-- > 0) { 85 if (len > (size_t)MB_CUR_MAX) { 86 /* Enough space to translate in-place. */ 87 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) { 88 *src = s; 89 return ((size_t)-1); 90 } 91 } else { 92 /* 93 * May not be enough space; use temp. buffer. 94 * 95 * We need to save a copy of the conversion state 96 * here so we can restore it if the multibyte 97 * character is too long for the buffer. 98 */ 99 mbsbak = *ps; 100 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) { 101 *src = s; 102 return ((size_t)-1); 103 } 104 if (nb > (int)len) { 105 /* MB sequence for character won't fit. */ 106 *ps = mbsbak; 107 break; 108 } 109 (void) memcpy(dst, buf, nb); 110 } 111 if (*s == L'\0') { 112 *src = NULL; 113 return (nbytes + nb - 1); 114 } 115 s++; 116 dst += nb; 117 len -= nb; 118 nbytes += nb; 119 } 120 *src = s; 121 return (nbytes); 122 } 123