1/*	$NetBSD: vswscanf.c,v 1.5 2009/01/11 02:46:30 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 * 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
42static 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 1.5 2009/01/11 02:46:30 christos Exp $");
46#endif
47#endif /* LIBC_SCCS and not lint */
48
49#include <limits.h>
50#include <stdarg.h>
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <wchar.h>
55#include "reentrant.h"
56#include "local.h"
57
58static int	eofread(void *, char *, int);
59
60static int
61/*ARGSUSED*/
62eofread(void *cookie, char *buf, int len)
63{
64
65	return (0);
66}
67
68int
69vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
70    va_list ap)
71{
72	static const mbstate_t initial;
73	mbstate_t mbs;
74	FILE f;
75	char *mbstr;
76	size_t mlen;
77	int r;
78	const wchar_t *rstr = str;
79	struct __sfileext fext;
80
81	/*
82	 * XXX Convert the wide character string to multibyte, which
83	 * __vfwscanf() will convert back to wide characters.
84	 */
85	if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
86		return (EOF);
87	mbs = initial;
88	if ((mlen = wcsrtombs(mbstr, &rstr, SIZE_T_MAX, &mbs)) == (size_t)-1) {
89		free(mbstr);
90		return (EOF);
91	}
92	_FILEEXT_SETUP(&f, &fext);
93	(void)memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
94	f._file = -1;
95	f._flags = __SRD;
96	f._bf._base = f._p = (unsigned char *)mbstr;
97	f._bf._size = f._r = mlen;
98	f._read = eofread;
99	_UB(&f)._base = NULL;
100	r = __vfwscanf_unlocked(&f, fmt, ap);
101	free(mbstr);
102
103	return (r);
104}
105