1 /* $NetBSD: vswscanf.c,v 1.12 2013/05/17 12:55:57 joerg Exp $ */
2
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 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39 #include <sys/cdefs.h>
40 #if defined(LIBC_SCCS) && !defined(lint)
41 #if 0
42 static char sccsid[] = "@(#)vsscanf.c 8.1 (Berkeley) 6/4/93";
43 __FBSDID("$FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.3 2004/04/07 09:55:05 tjr Exp $");
44 #else
45 __RCSID("$NetBSD: vswscanf.c,v 1.12 2013/05/17 12:55:57 joerg Exp $");
46 #endif
47 #endif /* LIBC_SCCS and not lint */
48
49 #include "namespace.h"
50
51 #include <assert.h>
52 #include <limits.h>
53 #include <locale.h>
54 #include <stdarg.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <string.h>
58 #include <wchar.h>
59 #include "reentrant.h"
60 #include "setlocale_local.h"
61 #include "local.h"
62
__weak_alias(vswscanf_l,_vswscanf_l)63 __weak_alias(vswscanf_l, _vswscanf_l)
64
65 static ssize_t
66 /*ARGSUSED*/
67 eofread(void *cookie, void *buf, size_t len)
68 {
69
70 return 0;
71 }
72
73 int
vswscanf_l(const wchar_t * __restrict str,locale_t loc,const wchar_t * __restrict fmt,va_list ap)74 vswscanf_l(const wchar_t * __restrict str, locale_t loc,
75 const wchar_t * __restrict fmt, va_list ap)
76 {
77 static const mbstate_t initial;
78 mbstate_t mbs;
79 FILE f;
80 char *mbstr;
81 size_t mlen;
82 int r;
83 const wchar_t *rstr = str;
84 struct __sfileext fext;
85
86 /*
87 * XXX Convert the wide character string to multibyte, which
88 * __vfwscanf() will convert back to wide characters.
89 */
90 mbstr = malloc(wcslen(str) * MB_CUR_MAX_L(loc) + 1);
91 if (mbstr == NULL)
92 return EOF;
93 mbs = initial;
94 if ((mlen = wcsrtombs_l(mbstr, &rstr, SIZE_T_MAX, &mbs, loc))
95 == (size_t)-1) {
96 free(mbstr);
97 return EOF;
98 }
99 _FILEEXT_SETUP(&f, &fext);
100 (void)memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
101 f._file = -1;
102 f._flags = __SRD;
103 f._bf._base = f._p = (unsigned char *)mbstr;
104 _DIAGASSERT(__type_fit(int, mlen));
105 f._bf._size = f._r = (int)mlen;
106 f._read = eofread;
107 _UB(&f)._base = NULL;
108 r = __vfwscanf_unlocked_l(&f, loc, fmt, ap);
109 free(mbstr);
110
111 return r;
112 }
113
114 int
vswscanf(const wchar_t * __restrict str,const wchar_t * __restrict fmt,va_list ap)115 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
116 va_list ap)
117 {
118 return vswscanf_l(str, _current_locale(), fmt, ap);
119 }
120