#include	"lib9.h"#include	<bio.h> longBoffset(Biobuf *bp){	long n; 	switch(bp->state) {	default:		fprint(2, "Boffset: unknown state %d\n", bp->state);		n = Beof;		break; 	case Bracteof:	case Bractive:		n = bp->offset + bp->icount;		break; 	case Bwactive:		n = bp->offset + (bp->bsize + bp->ocount);		break;	}	return n;}