1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
5 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
6 * Copyright (c) 2002-2004 Tim J. Robbins.
7 *
8 * Copyright (c) 2011 The FreeBSD Foundation
9 *
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
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
mbsnrtowcs_l(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps,locale_t locale)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 = &(XLOCALE_CTYPE(locale)->mbsnrtowcs);
48 return (XLOCALE_CTYPE(locale)->__mbsnrtowcs(dst, src, nms, len, ps));
49 }
50 size_t
mbsnrtowcs(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps)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
__mbsnrtowcs_std(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps,mbrtowc_pfn_t pmbrtowc)58 __mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src,
59 size_t nms, size_t len, mbstate_t * __restrict ps,
60 mbrtowc_pfn_t pmbrtowc)
61 {
62 const char *s;
63 size_t nchr;
64 wchar_t wc;
65 size_t nb;
66
67 s = *src;
68 nchr = 0;
69
70 if (dst == NULL) {
71 for (;;) {
72 if ((nb = pmbrtowc(&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 = pmbrtowc(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