/*
   =============================================================================
	fseek.c -- perform a seek on a stream file
	Version 4 -- 1987-10-28 -- D.N. Lynx Crowe
   =============================================================================
*/

#include "stdio.h"
#include "biosdefs.h"
#include "io.h"
#include "stddefs.h"

/*
   =============================================================================
	fseek(fp, pos, mode) -- position file 'fp' at 'pos' in mode 'mode'.
   =============================================================================
*/

fseek(fp, pos, mode)
register FILE *fp;
long pos;
int mode;
{
	register int i, lr;
	long curpos, lseek();

	if (fp->_flags & _DIRTY) {

		if (flush_(fp, -1))
			return(EOF);

	} else {

		if (mode EQ 1 AND fp->_bp)
			pos -= (long)fp->_bend - (long)fp->_bp;
	}

	fp->_bp = fp->_bend = NULL;
	fp->_flags &= ~_EOF;

	lr = lseek(fp->_unit, pos, mode);

	if (chantab[fp->_unit].c_arg->modefl & FC_EOF)
		fp->_flags |= _EOF;

	if (lr < 0)
		return(EOF);

	return(0);
}