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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1986 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lint.h"
#include "file64.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <widec.h>
#include <string.h>
#include "libc.h"
#include "stdiom.h"
/*
* wsscanf -- this function will read wchar_t characters from
* wchar_t string according to the conversion format.
* Note that the performance degrades if the intermediate
* result of conversion exceeds 1024 bytes due to the
* use of malloc() on each call.
* We should implement wchar_t version of doscan()
* for better performance.
*/
#define MAXINSTR 1024
int
wsscanf(wchar_t *string, const char *format, ...)
{
va_list ap;
size_t i;
char stackbuf[MAXINSTR];
char *tempstring = stackbuf;
size_t malloced = 0;
int j;
i = wcstombs(tempstring, string, MAXINSTR);
if (i == (size_t)-1)
return (-1);
if (i == MAXINSTR) { /* The buffer was too small. Malloc it. */
tempstring = malloc(malloced = MB_CUR_MAX*wcslen(string)+1);
if (tempstring == 0)
return (-1);
i = wcstombs(tempstring, string, malloced); /* Try again. */
if (i == (size_t)-1) {
free(tempstring);
return (-1);
}
}
va_start(ap, format);
j = vsscanf(tempstring, format, ap);
va_end(ap);
if (malloced) free(tempstring);
return (j);
}
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