1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Donn Seeley at UUNET Technologies, Inc.
9 *
10 * Copyright (c) 2011 The FreeBSD Foundation
11 *
12 * Portions of this software were developed by David Chisnall
13 * under sponsorship from the FreeBSD Foundation.
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40 #include <limits.h>
41 #include <stdarg.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <wchar.h>
46 #include "local.h"
47 #include "xlocale_private.h"
48
49 static int eofread(void *, char *, int);
50
51 static int
eofread(void * cookie,char * buf,int len)52 eofread(void *cookie, char *buf, int len)
53 {
54
55 return (0);
56 }
57
58 int
vswscanf_l(const wchar_t * __restrict str,locale_t locale,const wchar_t * __restrict fmt,va_list ap)59 vswscanf_l(const wchar_t * __restrict str, locale_t locale,
60 const wchar_t * __restrict fmt, va_list ap)
61 {
62 static const mbstate_t initial;
63 mbstate_t mbs;
64 FILE f = FAKE_FILE;
65 char *mbstr;
66 size_t mlen;
67 int r;
68 const wchar_t *strp;
69 FIX_LOCALE(locale);
70
71 /*
72 * XXX Convert the wide character string to multibyte, which
73 * __vfwscanf() will convert back to wide characters.
74 */
75 if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
76 return (EOF);
77 mbs = initial;
78 strp = str;
79 if ((mlen = wcsrtombs_l(mbstr, &strp, SIZE_T_MAX, &mbs, locale)) == (size_t)-1) {
80 free(mbstr);
81 return (EOF);
82 }
83 f._flags = __SRD;
84 f._bf._base = f._p = (unsigned char *)mbstr;
85 f._bf._size = f._r = mlen;
86 f._read = eofread;
87 r = __vfwscanf(&f, locale, fmt, ap);
88 free(mbstr);
89
90 return (r);
91 }
92 int
vswscanf(const wchar_t * __restrict str,const wchar_t * __restrict fmt,va_list ap)93 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
94 va_list ap)
95 {
96 return vswscanf_l(str, __get_locale(), fmt, ap);
97 }
98