1 /*
2 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
4 * Copyright (c) 2002-2004 Tim J. Robbins.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "lint.h"
30 #include <limits.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <locale.h>
34 #include <wchar.h>
35 #include "mblocal.h"
36 #include "localeimpl.h"
37 #include "lctype.h"
38
39 size_t
wcsnrtombs_l(char * _RESTRICT_KYWD dst,const wchar_t ** _RESTRICT_KYWD src,size_t nwc,size_t len,mbstate_t * _RESTRICT_KYWD ps,locale_t loc)40 wcsnrtombs_l(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src,
41 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps, locale_t loc)
42 {
43 static mbstate_t mbs;
44
45 if (ps == NULL)
46 ps = &mbs;
47 return (loc->ctype->lc_wcsnrtombs(dst, src, nwc, len, ps));
48 }
49
50 size_t
wcsnrtombs(char * _RESTRICT_KYWD dst,const wchar_t ** _RESTRICT_KYWD src,size_t nwc,size_t len,mbstate_t * _RESTRICT_KYWD ps)51 wcsnrtombs(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src,
52 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps)
53 {
54 return (wcsnrtombs_l(dst, src, nwc, len, ps, uselocale(NULL)));
55 }
56
57 size_t
__wcsnrtombs_std(char * _RESTRICT_KYWD dst,const wchar_t ** _RESTRICT_KYWD src,size_t nwc,size_t len,mbstate_t * _RESTRICT_KYWD ps,wcrtomb_pfn_t pwcrtomb)58 __wcsnrtombs_std(char *_RESTRICT_KYWD dst, const wchar_t **_RESTRICT_KYWD src,
59 size_t nwc, size_t len, mbstate_t *_RESTRICT_KYWD ps,
60 wcrtomb_pfn_t pwcrtomb)
61 {
62 mbstate_t mbsbak;
63 char buf[MB_LEN_MAX];
64 const wchar_t *s;
65 size_t nbytes;
66 size_t nb;
67
68 s = *src;
69 nbytes = 0;
70
71 if (dst == NULL) {
72 while (nwc-- > 0) {
73 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1)
74 /* Invalid character - wcrtomb() sets errno. */
75 return ((size_t)-1);
76 else if (*s == L'\0')
77 return (nbytes + nb - 1);
78 s++;
79 nbytes += nb;
80 }
81 return (nbytes);
82 }
83
84 while (len > 0 && nwc-- > 0) {
85 if (len > (size_t)MB_CUR_MAX) {
86 /* Enough space to translate in-place. */
87 if ((nb = pwcrtomb(dst, *s, ps)) == (size_t)-1) {
88 *src = s;
89 return ((size_t)-1);
90 }
91 } else {
92 /*
93 * May not be enough space; use temp. buffer.
94 *
95 * We need to save a copy of the conversion state
96 * here so we can restore it if the multibyte
97 * character is too long for the buffer.
98 */
99 mbsbak = *ps;
100 if ((nb = pwcrtomb(buf, *s, ps)) == (size_t)-1) {
101 *src = s;
102 return ((size_t)-1);
103 }
104 if (nb > (int)len) {
105 /* MB sequence for character won't fit. */
106 *ps = mbsbak;
107 break;
108 }
109 (void) memcpy(dst, buf, nb);
110 }
111 if (*s == L'\0') {
112 *src = NULL;
113 return (nbytes + nb - 1);
114 }
115 s++;
116 dst += nb;
117 len -= nb;
118 nbytes += nb;
119 }
120 *src = s;
121 return (nbytes);
122 }
123