vswscanf.c revision 122105 
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 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38#if 0
39#if defined(LIBC_SCCS) && !defined(lint)
40static char sccsid[] = "@(#)vsscanf.c	8.1 (Berkeley) 6/4/93";
41#endif /* LIBC_SCCS and not lint */
42__FBSDID("FreeBSD: src/lib/libc/stdio/vsscanf.c,v 1.11 2002/08/21 16:19:57 mike Exp ");
43#endif
44__FBSDID("$FreeBSD: head/lib/libc/stdio/vswscanf.c 122105 2003-11-05 08:20:45Z tjr $");
45
46#include <limits.h>
47#include <stdarg.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <string.h>
51#include <wchar.h>
52#include "local.h"
53
54static int	eofread(void *, char *, int);
55
56static int
57eofread(void *cookie, char *buf, int len)
58{
59
60	return (0);
61}
62
63int
64vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
65    va_list ap)
66{
67	FILE f;
68	struct __sFILEX ext;
69	char *mbstr;
70	size_t mlen;
71	int r;
72
73	/*
74	 * XXX Convert the wide character string to multibyte, which
75	 * __vfwscanf() will convert back to wide characters.
76	 */
77	if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
78		return (EOF);
79	if ((mlen = wcsrtombs(mbstr, &str, SIZE_T_MAX, NULL)) == (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._extra = &ext;
91	INITEXTRA(&f);
92	r = __vfwscanf(&f, fmt, ap);
93	free(mbstr);
94
95	return (r);
96}
97