sl@0: /* REWIND.C
sl@0:  * 
sl@0:  * Portions Copyright (c) 1990-1999 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Copyright (c) 1990 The Regents of the University of California.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms are permitted
sl@0:  * provided that the above copyright notice and this paragraph are
sl@0:  * duplicated in all such forms and that any documentation,
sl@0:  * advertising materials, and other materials related to such
sl@0:  * distribution and use acknowledge that the software was developed
sl@0:  * by the University of California, Berkeley.  The name of the
sl@0:  * University may not be used to endorse or promote products derived
sl@0:  * from this software without specific prior written permission.
sl@0:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
sl@0:  */
sl@0: 
sl@0: /*
sl@0: FUNCTION
sl@0: <<rewind>>---reinitialize a file or stream
sl@0: 
sl@0: INDEX
sl@0: 	rewind
sl@0: 
sl@0: ANSI_SYNOPSIS
sl@0: 	#include <stdio.h>
sl@0: 	void rewind(FILE *<[fp]>);
sl@0: 
sl@0: TRAD_SYNOPSIS
sl@0: 	#include <stdio.h>
sl@0: 	void rewind(<[fp]>)
sl@0: 	FILE *<[fp]>;
sl@0: 
sl@0: DESCRIPTION
sl@0: <<rewind>> returns the file position indicator (if any) for the file
sl@0: or stream identified by <[fp]> to the beginning of the file.  It also
sl@0: clears any error indicator and flushes any pending output.
sl@0: 
sl@0: RETURNS
sl@0: <<rewind>> does not return a result.
sl@0: 
sl@0: PORTABILITY
sl@0: ANSI C requires <<rewind>>.
sl@0: 
sl@0: No supporting OS subroutines are required.
sl@0: */
sl@0: 
sl@0: #include <stdio.h>
sl@0: /**
sl@0: Repositions the file pointer to the beginning of a stream.
sl@0: Sets the file pointer associated with the stream 
sl@0: to the beginning of the file.
sl@0: @param Pointer to an open file.
sl@0: */
sl@0: EXPORT_C void
sl@0: rewind (FILE * fp)
sl@0: {
sl@0:   (void) fflush (fp);
sl@0:   clearerr (fp);
sl@0:   if (fp->_seek == NULL)
sl@0:     return;			/* ??? */
sl@0:   fp->_r = 0;
sl@0:   fp->_p = fp->_bf._base;
sl@0:   (void) (*fp->_seek) (fp->_cookie, (fpos_t) 0, SEEK_SET);
sl@0: }