fwide.c revision 6b5e5868e7ebf1aff3a5abd7d0c4ef0e5fbf3648
/*
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2002 Tim J. Robbins.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "lint.h"
#include "mse_int.h"
#include "file64.h"
#include "mse.h"
#include <errno.h>
#include <stdio.h>
#include <wchar.h>
#include "mblocal.h"
int
fwide(FILE *fp, int mode)
{
int m;
rmutex_t *lk;
FLOCKFILE(lk, fp);
/* Only change the orientation if the stream is not oriented yet. */
m = _getorientation(fp);
if (mode != 0 && m == _NO_MODE)
_setorientation(fp, (mode > 0) ? _WC_MODE : _BYTE_MODE);
FUNLOCKFILE(lk);
switch (m) {
case _WC_MODE:
mode = 1;
break;
case _NO_MODE:
mode = 0;
break;
case _BYTE_MODE:
mode = -1;
break;
}
return (mode);
}