1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright 2013 Garrett D'Amore <[email protected]>
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 * All rights reserved.
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 <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
38
39 #include <limits.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <wchar.h>
43 #include "mblocal.h"
44
45 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)46 wcsnrtombs_l(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc,
47 size_t len, mbstate_t * __restrict ps, locale_t locale)
48 {
49 FIX_LOCALE(locale);
50 if (ps == NULL)
51 ps = &(XLOCALE_CTYPE(locale)->wcsnrtombs);
52 return (XLOCALE_CTYPE(locale)->__wcsnrtombs(dst, src, nwc, len, ps));
53 }
54 size_t
wcsnrtombs(char * __restrict dst,const wchar_t ** __restrict src,size_t nwc,size_t len,mbstate_t * __restrict ps)55 wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t nwc,
56 size_t len, mbstate_t * __restrict ps)
57 {
58 return wcsnrtombs_l(dst, src, nwc, len, ps, __get_locale());
59 }
60
61
62 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)63 __wcsnrtombs_std(char * __restrict dst, const wchar_t ** __restrict src,
64 size_t nwc, size_t len, mbstate_t * __restrict ps,
65 wcrtomb_pfn_t pwcrtomb)
66 {
67 mbstate_t mbsbak;
68 char buf[MB_LEN_MAX];
69 const wchar_t *s;
70 size_t nbytes;
71 size_t nb;
72
73 s = *src;
74 nbytes = 0;
75
76 if (dst == NULL) {
77 while (nwc-- > 0) {
78 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1)
79 /* Invalid character - wcrtomb() sets errno. */
80 return ((size_t)-1);
81 else if (*s == L'\0')
82 return (nbytes + nb - 1);
83 s++;
84 nbytes += nb;
85 }
86 return (nbytes);
87 }
88
89 while (len > 0 && nwc-- > 0) {
90 if (len > (size_t)MB_CUR_MAX) {
91 /* Enough space to translate in-place. */
92 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) {
93 *src = s;
94 return ((size_t)-1);
95 }
96 } else {
97 /*
98 * May not be enough space; use temp. buffer.
99 *
100 * We need to save a copy of the conversion state
101 * here so we can restore it if the multibyte
102 * character is too long for the buffer.
103 */
104 mbsbak = *ps;
105 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) {
106 *src = s;
107 return ((size_t)-1);
108 }
109 if (nb > (int)len) {
110 /* MB sequence for character won't fit. */
111 *ps = mbsbak;
112 break;
113 }
114 memcpy(dst, buf, nb);
115 }
116 if (*s == L'\0') {
117 *src = NULL;
118 return (nbytes + nb - 1);
119 }
120 s++;
121 dst += nb;
122 len -= nb;
123 nbytes += nb;
124 }
125 *src = s;
126 return (nbytes);
127 }
128