xref: /freebsd/lib/libc/stdio/vsscanf.c (revision f81cdf24ba5436367377f7c8e8f51f6df2a75ca7)
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  * Copyright (c) 2011 The FreeBSD Foundation
8  *
9  * Portions of this software were developed by David Chisnall
10  * under sponsorship from the FreeBSD Foundation.
11  *
12  * This code is derived from software contributed to Berkeley by
13  * Donn Seeley at UUNET Technologies, Inc.
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 <stdio.h>
41 #include <string.h>
42 #include "local.h"
43 #include "xlocale_private.h"
44 
45 static int
46 eofread(void *, char *, int);
47 
48 /* ARGSUSED */
49 static int
50 eofread(void *cookie, char *buf, int len)
51 {
52 
53 	return (0);
54 }
55 
56 int
57 vsscanf_l(const char * __restrict str, locale_t locale,
58 		const char * __restrict fmt, __va_list ap)
59 {
60 	FILE f = FAKE_FILE;
61 	FIX_LOCALE(locale);
62 
63 	f._flags = __SRD;
64 	f._bf._base = f._p = (unsigned char *)str;
65 	f._bf._size = f._r = strlen(str);
66 	f._read = eofread;
67 	return (__svfscanf(&f, locale, fmt, ap));
68 }
69 int
70 vsscanf(const char * __restrict str, const char * __restrict fmt,
71 	__va_list ap)
72 {
73 	return vsscanf_l(str, __get_locale(), fmt, ap);
74 }
75