/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ /* * pANS stdio -- ftello */#include "iolib.h"long long ftello(FILE *f){	long long seekp=seek(f->fd, 0L, 1);	if(seekp<0) return -1;		/* enter error state? */	switch(f->state){	default:		return seekp;	case RD:		return seekp-(f->wp-f->rp);	case WR:		return (f->flags&LINEBUF?f->lp:f->wp)-f->buf+seekp;	}}