vswscanf.c revision 302408 
1/*-
2 * Copyright (c) 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Donn Seeley at UUNET Technologies, Inc.
7 *
8 * Copyright (c) 2011 The FreeBSD Foundation
9 * All rights reserved.
10 * Portions of this software were developed by David Chisnall
11 * under sponsorship from the FreeBSD Foundation.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39#if 0
40#if defined(LIBC_SCCS) && !defined(lint)
41static char sccsid[] = "@(#)vsscanf.c	8.1 (Berkeley) 6/4/93";
42#endif /* LIBC_SCCS and not lint */
43__FBSDID("FreeBSD: src/lib/libc/stdio/vsscanf.c,v 1.11 2002/08/21 16:19:57 mike Exp ");
44#endif
45__FBSDID("$FreeBSD: stable/11/lib/libc/stdio/vswscanf.c 249808 2013-04-23 13:33:13Z emaste $");
46
47#include <limits.h>
48#include <stdarg.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <wchar.h>
53#include "local.h"
54#include "xlocale_private.h"
55
56static int	eofread(void *, char *, int);
57
58static int
59eofread(void *cookie, char *buf, int len)
60{
61
62	return (0);
63}
64
65int
66vswscanf_l(const wchar_t * __restrict str, locale_t locale,
67		const wchar_t * __restrict fmt, va_list ap)
68{
69	static const mbstate_t initial;
70	mbstate_t mbs;
71	FILE f = FAKE_FILE;
72	char *mbstr;
73	size_t mlen;
74	int r;
75	const wchar_t *strp;
76	FIX_LOCALE(locale);
77
78	/*
79	 * XXX Convert the wide character string to multibyte, which
80	 * __vfwscanf() will convert back to wide characters.
81	 */
82	if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
83		return (EOF);
84	mbs = initial;
85	strp = str;
86	if ((mlen = wcsrtombs_l(mbstr, &strp, SIZE_T_MAX, &mbs, locale)) == (size_t)-1) {
87		free(mbstr);
88		return (EOF);
89	}
90	f._flags = __SRD;
91	f._bf._base = f._p = (unsigned char *)mbstr;
92	f._bf._size = f._r = mlen;
93	f._read = eofread;
94	r = __vfwscanf(&f, locale, fmt, ap);
95	free(mbstr);
96
97	return (r);
98}
99int
100vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
101    va_list ap)
102{
103	return vswscanf_l(str, __get_locale(), fmt, ap);
104}
105