kolibrios-gitea/programs/develop/open watcom/trunk/clib/streamio/fwide.c

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/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Platform independent fwide() implementation.
*
****************************************************************************/
#include "variety.h"
#include <stdio.h>
#include <wchar.h>
#include "fileacc.h"
#include "rtdata.h"
_WCRTLINK int fwide( FILE *fp, int mode )
{
int new_mode;
_ValidFile( fp, EOF );
_AccessFile( fp );
#ifndef __NETWARE__
/* Set orientation if possible */
if( mode > 0 && _FP_ORIENTATION(fp) == _NOT_ORIENTED )
_FP_ORIENTATION(fp) = _WIDE_ORIENTED;
else if( mode < 0 && _FP_ORIENTATION(fp) == _NOT_ORIENTED )
_FP_ORIENTATION(fp) = _BYTE_ORIENTED;
/* Find out what the current orientation is */
new_mode = _FP_ORIENTATION(fp) == _WIDE_ORIENTED ?
1 : (_FP_ORIENTATION(fp) == _BYTE_ORIENTED ? -1 : 0);
#else
new_mode = 0;
#endif
_ReleaseFile( fp );
return( new_mode );
}