1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Copyright (c) 2011 The FreeBSD Foundation 6 * All rights reserved. 7 * Portions of this software were developed by David Chisnall 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * $FreeBSD: head/lib/libc/locale/wcsnrtombs.c 227753 2011-11-20 14:45:42Z theraven $ 32 */ 33 34 35 #include <limits.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <wchar.h> 39 #include "mblocal.h" 40 41 size_t 42 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 43 size_t len, mbstate_t * __restrict ps, locale_t locale) 44 { 45 FIX_LOCALE(locale); 46 if (ps == NULL) 47 ps = &locale->wcsnrtombs; 48 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps)); 49 } 50 size_t 51 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 52 size_t len, mbstate_t * __restrict ps) 53 { 54 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale()); 55 } 56 57 58 size_t 59 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, 60 size_t nwc, size_t len, mbstate_t * __restrict ps) 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 struct xlocale_ctype *l = XLOCALE_CTYPE(__get_locale()); 68 69 s = *src; 70 nbytes = 0; 71 72 if (dst == NULL) { 73 while (nwc-- > 0) { 74 if ((nb = l->__wcrtomb(buf, *s, ps)) == (size_t)-1) 75 /* Invalid character - wcrtomb() sets errno. */ 76 return ((size_t)-1); 77 else if (*s == L'\0') 78 return (nbytes + nb - 1); 79 s++; 80 nbytes += nb; 81 } 82 return (nbytes); 83 } 84 85 while (len > 0 && nwc-- > 0) { 86 if (len > (size_t)MB_CUR_MAX) { 87 /* Enough space to translate in-place. */ 88 if ((nb = l->__wcrtomb(dst, *s, ps)) == (size_t)-1) { 89 *src = s; 90 return ((size_t)-1); 91 } 92 } else { 93 /* 94 * May not be enough space; use temp. buffer. 95 * 96 * We need to save a copy of the conversion state 97 * here so we can restore it if the multibyte 98 * character is too long for the buffer. 99 */ 100 mbsbak = *ps; 101 if ((nb = l->__wcrtomb(buf, *s, ps)) == (size_t)-1) { 102 *src = s; 103 return ((size_t)-1); 104 } 105 if (nb > (int)len) { 106 /* MB sequence for character won't fit. */ 107 *ps = mbsbak; 108 break; 109 } 110 memcpy(dst, buf, nb); 111 } 112 if (*s == L'\0') { 113 *src = NULL; 114 return (nbytes + nb - 1); 115 } 116 s++; 117 dst += nb; 118 len -= nb; 119 nbytes += nb; 120 } 121 *src = s; 122 return (nbytes); 123 } 124