sscanf.c revision 1.20 
1/*	$NetBSD: sscanf.c,v 1.20 2012/03/27 15:05:42 christos 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 * Chris Torek.
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. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#if defined(LIBC_SCCS) && !defined(lint)
37#if 0
38static char sccsid[] = "@(#)sscanf.c	8.1 (Berkeley) 6/4/93";
39#else
40__RCSID("$NetBSD: sscanf.c,v 1.20 2012/03/27 15:05:42 christos Exp $");
41#endif
42#endif /* LIBC_SCCS and not lint */
43
44#include <assert.h>
45#include <errno.h>
46#include <stdarg.h>
47#include <stdio.h>
48#include <string.h>
49
50#include "reentrant.h"
51#include "local.h"
52
53/* ARGSUSED */
54static ssize_t
55eofread(void *cookie, void *buf, size_t len)
56{
57
58	return 0;
59}
60
61int
62sscanf(const char *str, char const *fmt, ...)
63{
64	int ret;
65	va_list ap;
66	FILE f;
67	size_t len;
68	struct __sfileext fext;
69
70	_DIAGASSERT(str != NULL);
71	_DIAGASSERT(fmt != NULL);
72
73	_FILEEXT_SETUP(&f, &fext);
74	f._flags = __SRD;
75	f._bf._base = f._p = __UNCONST(str);
76	len = strlen(str);
77	_DIAGASSERT(__type_fit(int, len));
78	f._bf._size = f._r = (int)len;
79	f._read = eofread;
80	_UB(&f)._base = NULL;
81	va_start(ap, fmt);
82	ret = __svfscanf_unlocked(&f, fmt, ap);
83	va_end(ap);
84	return ret;
85}
86