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 * All rights reserved.
8 *
9 * Copyright (c) 2011 The FreeBSD Foundation
10 *
11 * Portions of this software were developed by David Chisnall
12 * under sponsorship from the FreeBSD Foundation.
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 <limits.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <wchar.h>
40 #include "mblocal.h"
41
42 size_t
wcsnrtombs_l(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps,locale_t locale)43 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc,
44 size_t len, mbstate_t * __restrict ps, locale_t locale)
45 {
46 FIX_LOCALE(locale);
47 if (ps == NULL)
48 ps = &(XLOCALE_CTYPE(locale)->wcsnrtombs);
49 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps));
50 }
51 size_t
wcsnrtombs(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps)52 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc,
53 size_t len, mbstate_t * __restrict ps)
54 {
55 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale());
56 }
57
58
59 size_t
__wcsnrtombs_std(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps,wcrtomb_pfn_t pwcrtomb)60 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src,
61 size_t nwc, size_t len, mbstate_t * __restrict ps,
62 wcrtomb_pfn_t pwcrtomb)
63 {
64 mbstate_t mbsbak;
65 char buf[MB_LEN_MAX];
66 const wchar_t *s;
67 size_t nbytes;
68 size_t nb;
69
70 s = *src;
71 nbytes = 0;
72
73 if (dst == NULL) {
74 while (nwc-- > 0) {
75 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1)
76 /* Invalid character - wcrtomb() sets errno. */
77 return ((size_t)-1);
78 else if (*s == L'\0')
79 return (nbytes + nb - 1);
80 s++;
81 nbytes += nb;
82 }
83 return (nbytes);
84 }
85
86 while (len > 0 && nwc-- > 0) {
87 if (len > (size_t)MB_CUR_MAX) {
88 /* Enough space to translate in-place. */
89 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) {
90 *src = s;
91 return ((size_t)-1);
92 }
93 } else {
94 /*
95 * May not be enough space; use temp. buffer.
96 *
97 * We need to save a copy of the conversion state
98 * here so we can restore it if the multibyte
99 * character is too long for the buffer.
100 */
101 mbsbak = *ps;
102 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) {
103 *src = s;
104 return ((size_t)-1);
105 }
106 if (nb > (int)len) {
107 /* MB sequence for character won't fit. */
108 *ps = mbsbak;
109 break;
110 }
111 memcpy(dst, buf, nb);
112 }
113 if (*s == L'\0') {
114 *src = NULL;
115 return (nbytes + nb - 1);
116 }
117 s++;
118 dst += nb;
119 len -= nb;
120 nbytes += nb;
121 }
122 *src = s;
123 return (nbytes);
124 }
125