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62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Platform independent ftell() implementaiton.
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*
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****************************************************************************/
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#include "variety.h"
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "fileacc.h"
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_WCRTLINK long ftell( FILE *fp )
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{
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long pos;
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_ValidFile( fp, -1 );
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if( fp->_flag & _APPEND && fp->_flag & _DIRTY ) {
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fflush( fp ); /* if data written in append mode, OS must know */
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}
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pos = tell( fileno( fp ) );
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if( pos == -1 ) {
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return( -1L );
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}
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_AccessFile( fp );
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if( fp->_cnt != 0 ) { /* if something in buffer */
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if( fp->_flag & _DIRTY ) { /* last operation was a put */
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pos += fp->_cnt;
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} else { /* last operation was a get */
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pos -= fp->_cnt;
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}
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}
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_ReleaseFile( fp );
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return( pos );
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}
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