vswscanf.c revision 187302 
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 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34#if 0
35#if defined(LIBC_SCCS) && !defined(lint)
36static char sccsid[] = "@(#)vsscanf.c	8.1 (Berkeley) 6/4/93";
37#endif /* LIBC_SCCS and not lint */
38__FBSDID("FreeBSD: src/lib/libc/stdio/vsscanf.c,v 1.11 2002/08/21 16:19:57 mike Exp ");
39#endif
40__FBSDID("$FreeBSD: head/lib/libc/stdio/vswscanf.c 187302 2009-01-15 18:53:52Z rdivacky $");
41
42#include <limits.h>
43#include <stdarg.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <string.h>
47#include <wchar.h>
48#include "local.h"
49
50static int	eofread(void *, char *, int);
51
52static int
53eofread(void *cookie, char *buf, int len)
54{
55
56	return (0);
57}
58
59int
60vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
61    va_list ap)
62{
63	static const mbstate_t initial;
64	mbstate_t mbs;
65	FILE f;
66	char *mbstr;
67	size_t mlen;
68	int r;
69	const wchar_t *strp;
70
71	/*
72	 * XXX Convert the wide character string to multibyte, which
73	 * __vfwscanf() will convert back to wide characters.
74	 */
75	if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
76		return (EOF);
77	mbs = initial;
78	strp = str;
79	if ((mlen = wcsrtombs(mbstr, &strp, SIZE_T_MAX, &mbs)) == (size_t)-1) {
80		free(mbstr);
81		return (EOF);
82	}
83	f._file = -1;
84	f._flags = __SRD;
85	f._bf._base = f._p = (unsigned char *)mbstr;
86	f._bf._size = f._r = mlen;
87	f._read = eofread;
88	f._ub._base = NULL;
89	f._lb._base = NULL;
90	f._orientation = 0;
91	memset(&f._mbstate, 0, sizeof(mbstate_t));
92	r = __vfwscanf(&f, fmt, ap);
93	free(mbstr);
94
95	return (r);
96}
97