1 /*- 2 * Copyright (c) 2002-2004 Tim J. Robbins. 3 * 4 * Copyright (c) 2011 The FreeBSD Foundation 5 * All rights reserved. 6 * Portions of this software were developed by David Chisnall 7 * under sponsorship from the FreeBSD Foundation. 8 * All rights reserved. 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/mbsnrtowcs.c 227753 2011-11-20 14:45:42Z theraven $ 32 */ 33 34 35 #include <errno.h> 36 #include <limits.h> 37 #include <stdlib.h> 38 #include <wchar.h> 39 #include "mblocal.h" 40 41 size_t 42 mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src, 43 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t locale) 44 { 45 FIX_LOCALE(locale); 46 if (ps == NULL) 47 ps = &locale->mbsnrtowcs; 48 return (XLOCALE_CTYPE(locale)->__mbsnrtowcs(dst, src, nms, len, ps)); 49 } 50 size_t 51 mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src, 52 size_t nms, size_t len, mbstate_t * __restrict ps) 53 { 54 return mbsnrtowcs_l(dst, src, nms, len, ps, __get_locale()); 55 } 56 57 size_t 58 __mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src, 59 size_t nms, size_t len, mbstate_t * __restrict ps) 60 { 61 const char *s; 62 size_t nchr; 63 wchar_t wc; 64 size_t nb; 65 struct xlocale_ctype *ct = XLOCALE_CTYPE(__get_locale()); 66 67 s = *src; 68 nchr = 0; 69 70 if (dst == NULL) { 71 for (;;) { 72 if ((nb = ct->__mbrtowc(&wc, s, nms, ps)) == (size_t)-1) 73 /* Invalid sequence - mbrtowc() sets errno. */ 74 return ((size_t)-1); 75 else if (nb == 0 || nb == (size_t)-2) 76 return (nchr); 77 s += nb; 78 nms -= nb; 79 nchr++; 80 } 81 /*NOTREACHED*/ 82 } 83 84 while (len-- > 0) { 85 if ((nb = ct->__mbrtowc(dst, s, nms, ps)) == (size_t)-1) { 86 *src = s; 87 return ((size_t)-1); 88 } else if (nb == (size_t)-2) { 89 *src = s + nms; 90 return (nchr); 91 } else if (nb == 0) { 92 *src = NULL; 93 return (nchr); 94 } 95 s += nb; 96 nms -= nb; 97 nchr++; 98 dst++; 99 } 100 *src = s; 101 return (nchr); 102 } 103