1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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 * All rights reserved.
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 * All rights reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: stable/12/lib/libc/locale/mbsnrtowcs.c 326193 2017-11-25 17:12:48Z pfg $");
38
39 #include <errno.h>
40 #include <limits.h>
41 #include <stdlib.h>
42 #include <wchar.h>
43 #include "mblocal.h"
44
45 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)46 mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src,
47 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t locale)
48 {
49 FIX_LOCALE(locale);
50 if (ps == NULL)
51 ps = &locale->mbsnrtowcs;
52 return (XLOCALE_CTYPE(locale)->__mbsnrtowcs(dst, src, nms, len, ps));
53 }
54 size_t
mbsnrtowcs(wchar_t * __restrict dst,const char ** __restrict src,size_t nms,size_t len,mbstate_t * __restrict ps)55 mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
56 size_t nms, size_t len, mbstate_t * __restrict ps)
57 {
58 return mbsnrtowcs_l(dst, src, nms, len, ps, __get_locale());
59 }
60
61 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)62 __mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src,
63 size_t nms, size_t len, mbstate_t * __restrict ps,
64 mbrtowc_pfn_t pmbrtowc)
65 {
66 const char *s;
67 size_t nchr;
68 wchar_t wc;
69 size_t nb;
70
71 s = *src;
72 nchr = 0;
73
74 if (dst == NULL) {
75 for (;;) {
76 if ((nb = pmbrtowc(&wc, s, nms, ps)) == (size_t)-1)
77 /* Invalid sequence - mbrtowc() sets errno. */
78 return ((size_t)-1);
79 else if (nb == 0 || nb == (size_t)-2)
80 return (nchr);
81 s += nb;
82 nms -= nb;
83 nchr++;
84 }
85 /*NOTREACHED*/
86 }
87
88 while (len-- > 0) {
89 if ((nb = pmbrtowc(dst, s, nms, ps)) == (size_t)-1) {
90 *src = s;
91 return ((size_t)-1);
92 } else if (nb == (size_t)-2) {
93 *src = s + nms;
94 return (nchr);
95 } else if (nb == 0) {
96 *src = NULL;
97 return (nchr);
98 }
99 s += nb;
100 nms -= nb;
101 nchr++;
102 dst++;
103 }
104 *src = s;
105 return (nchr);
106 }
107