1/*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: src/lib/libc/locale/wcsnrtombs.c,v 1.3 2005/02/12 08:45:12 stefanf Exp $"); 29 30#include "xlocale_private.h" 31 32#include <limits.h> 33#include <stdlib.h> 34#include <string.h> 35#include <wchar.h> 36#include "mblocal.h" 37 38size_t 39wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 40 size_t len, mbstate_t * __restrict ps, locale_t loc) 41{ 42 NORMALIZE_LOCALE(loc); 43 if (ps == NULL) 44 ps = &loc->__mbs_wcsnrtombs; 45 return (loc->__lc_ctype->__wcsnrtombs(dst, src, nwc, len, ps, loc)); 46} 47 48size_t 49wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc, 50 size_t len, mbstate_t * __restrict ps) 51{ 52 return wcsnrtombs_l(dst, src, nwc, len, ps, __current_locale()); 53} 54 55__private_extern__ size_t 56__wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src, 57 size_t nwc, size_t len, mbstate_t * __restrict ps, locale_t loc) 58{ 59 mbstate_t mbsbak; 60 char buf[MB_LEN_MAX]; 61 const wchar_t *s; 62 size_t nbytes; 63 size_t nb; 64 struct __xlocale_st_runelocale *runeLocale = loc->__lc_ctype; 65 size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict, locale_t) = runeLocale->__wcrtomb; 66 int mb_cur_max = runeLocale->__mb_cur_max; 67 68 s = *src; 69 nbytes = 0; 70 71 if (dst == NULL) { 72 while (nwc-- > 0) { 73 if ((nb = __wcrtomb(buf, *s, ps, loc)) == (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 = __wcrtomb(dst, *s, ps, loc)) == (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 = __wcrtomb(buf, *s, ps, loc)) == (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 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