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vswscanf.c revision 1.9 
      1 /*	$NetBSD: vswscanf.c,v 1.9 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  * 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
     42 static 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 1.9 2012/03/27 15:05:42 christos Exp $");
     46 #endif
     47 #endif /* LIBC_SCCS and not lint */
     48 
     49 #include <assert.h>
     50 #include <limits.h>
     51 #include <stdarg.h>
     52 #include <stdio.h>
     53 #include <stdlib.h>
     54 #include <string.h>
     55 #include <wchar.h>
     56 #include "reentrant.h"
     57 #include "local.h"
     58 
     59 static ssize_t
     60 /*ARGSUSED*/
     61 eofread(void *cookie, void *buf, size_t len)
     62 {
     63 
     64 	return 0;
     65 }
     66 
     67 int
     68 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
     69     va_list ap)
     70 {
     71 	static const mbstate_t initial;
     72 	mbstate_t mbs;
     73 	FILE f;
     74 	char *mbstr;
     75 	size_t mlen;
     76 	int r;
     77 	const wchar_t *rstr = str;
     78 	struct __sfileext fext;
     79 
     80 	/*
     81 	 * XXX Convert the wide character string to multibyte, which
     82 	 * __vfwscanf() will convert back to wide characters.
     83 	 */
     84 	if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
     85 		return EOF;
     86 	mbs = initial;
     87 	if ((mlen = wcsrtombs(mbstr, &rstr, SIZE_T_MAX, &mbs)) == (size_t)-1) {
     88 		free(mbstr);
     89 		return EOF;
     90 	}
     91 	_FILEEXT_SETUP(&f, &fext);
     92 	(void)memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
     93 	f._file = -1;
     94 	f._flags = __SRD;
     95 	f._bf._base = f._p = (unsigned char *)mbstr;
     96 	_DIAGASSERT(__type_fit(int, mlen));
     97 	f._bf._size = f._r = (int)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