/***
*clearerr.c - clear error and eof flags
*
*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
*	defines clearerr() - clear error and eof flags from a stream
*
*Revision History:
*	11-30-83  RN	initial version
*	11-02-87  JCR	Multi-thread support
*	12-11-87  JCR	Added "_LOAD_DS" to declaration
*	05-31-88  PHG	Merged DLL and normal versions
*	06-01-88  JCR	Clear lowio flags as well as stdio flags
*	02-15-90  GJF	Fixed copyright and indents
*	03-16-90  GJF	Replaced _LOAD_DS with _CALLTYPE1 and added #include
*			<cruntime.h>.
*	07-23-90  SBM	Replaced <assertm.h> by <assert.h>
*	10-02-90  GJF	New-style function declarator.
*	01-22-91  GJF	ANSI naming.
*  03-27-92  DJM  POSIX support
*
*******************************************************************************/

#include <cruntime.h>
#include <stdio.h>
#include <assert.h>
#include <file2.h>
#include <os2dll.h>
#include <internal.h>
#ifndef _POSIX_
#include <msdos.h>
#endif

/***
*void clearerr(stream) - clear error and eof flags on a stream
*
*Purpose:
*	Resets the error and eof indicators for a stream to 0
*
*Entry:
*	FILE *stream - stream to set indicators on
*
*Exit:
*	No return value.
*	changes the _flag field of the FILE struct.
*
*Exceptions:
*
*******************************************************************************/

void _CALLTYPE1 clearerr (
	FILE *stream
	)
{
#ifdef MTHREAD
	int index;
#endif

	assert(stream != NULL);

#ifdef MTHREAD
	index = _iob_index(stream);
#endif

	_lock_str(index);

	/* Clear stdio level flags */
	stream->_flag &= ~(_IOERR|_IOEOF);

	/* Clear lowio level flags */

#ifndef _POSIX_
	_osfile[_fileno(stream)] &= ~(FEOFLAG);
#endif
	_unlock_str(index);
}