Home | History | Annotate | Line # | Download | only in stdio
fwide.c revision 1.1.2.2 
      1  1.1.2.2  nathanw /* $NetBSD: fwide.c,v 1.1.2.2 2002/01/28 20:51:00 nathanw Exp $ */
      2  1.1.2.2  nathanw 
      3  1.1.2.2  nathanw /*-
      4  1.1.2.2  nathanw  * Copyright (c)2001 Citrus Project,
      5  1.1.2.2  nathanw  * All rights reserved.
      6  1.1.2.2  nathanw  *
      7  1.1.2.2  nathanw  * Redistribution and use in source and binary forms, with or without
      8  1.1.2.2  nathanw  * modification, are permitted provided that the following conditions
      9  1.1.2.2  nathanw  * are met:
     10  1.1.2.2  nathanw  * 1. Redistributions of source code must retain the above copyright
     11  1.1.2.2  nathanw  *    notice, this list of conditions and the following disclaimer.
     12  1.1.2.2  nathanw  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1.2.2  nathanw  *    notice, this list of conditions and the following disclaimer in the
     14  1.1.2.2  nathanw  *    documentation and/or other materials provided with the distribution.
     15  1.1.2.2  nathanw  *
     16  1.1.2.2  nathanw  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  1.1.2.2  nathanw  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  1.1.2.2  nathanw  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  1.1.2.2  nathanw  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  1.1.2.2  nathanw  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  1.1.2.2  nathanw  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  1.1.2.2  nathanw  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  1.1.2.2  nathanw  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  1.1.2.2  nathanw  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1.2.2  nathanw  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1.2.2  nathanw  * SUCH DAMAGE.
     27  1.1.2.2  nathanw  *
     28  1.1.2.2  nathanw  * $Citrus$
     29  1.1.2.2  nathanw  */
     30  1.1.2.2  nathanw 
     31  1.1.2.2  nathanw #include <assert.h>
     32  1.1.2.2  nathanw #include <stdio.h>
     33  1.1.2.2  nathanw #include <wchar.h>
     34  1.1.2.2  nathanw #include "local.h"
     35  1.1.2.2  nathanw #include "reentrant.h"
     36  1.1.2.2  nathanw 
     37  1.1.2.2  nathanw int
     38  1.1.2.2  nathanw fwide(FILE *fp, int mode)
     39  1.1.2.2  nathanw {
     40  1.1.2.2  nathanw 	struct wchar_io_data *wcio;
     41  1.1.2.2  nathanw 
     42  1.1.2.2  nathanw 	_DIAGASSERT(fp != NULL);
     43  1.1.2.2  nathanw 
     44  1.1.2.2  nathanw 	/*
     45  1.1.2.2  nathanw 	 * this implementation use only -1, 0, 1
     46  1.1.2.2  nathanw 	 * for mode value.
     47  1.1.2.2  nathanw 	 * (we don't need to do this, but
     48  1.1.2.2  nathanw 	 *  this can make things simpler.)
     49  1.1.2.2  nathanw 	 */
     50  1.1.2.2  nathanw 	if (mode > 0)
     51  1.1.2.2  nathanw 		mode = 1;
     52  1.1.2.2  nathanw 	else if (mode < 0)
     53  1.1.2.2  nathanw 		mode = -1;
     54  1.1.2.2  nathanw 
     55  1.1.2.2  nathanw 	FLOCKFILE(fp);
     56  1.1.2.2  nathanw 	wcio = WCIO_GET(fp);
     57  1.1.2.2  nathanw 	if (!wcio)
     58  1.1.2.2  nathanw 		return 0; /* XXX */
     59  1.1.2.2  nathanw 
     60  1.1.2.2  nathanw 	if (wcio->wcio_mode == 0 && mode != 0)
     61  1.1.2.2  nathanw 		wcio->wcio_mode = mode;
     62  1.1.2.2  nathanw 	else
     63  1.1.2.2  nathanw 		mode = wcio->wcio_mode;
     64  1.1.2.2  nathanw 	FUNLOCKFILE(fp);
     65  1.1.2.2  nathanw 
     66  1.1.2.2  nathanw 	return mode;
     67  1.1.2.2  nathanw }
     68