if ( n <= 0 ) {
                    return (int) ( ( this.fp - start ) > 0L ? this.fp - start : -1 );
                }
                this.fp += n;
                len -= n;
                off += n;
                response.adjustOffset(n);
            }
            while ( len > 0 && n == r );

            return (int) ( this.fp - start );
        }
        catch ( CIFSException e ) {

            file.send( new SmbComReadAndX( file.fid, fp, r, null ), response );
            if(( n = response.dataLength ) <= 0 ) {
                return (int)((fp - start) > 0L ? fp - start : -1);
            }
            fp += n;
            len -= n;
            response.off += n;
        } while( len > 0 && n == r );

        return (int)(fp - start);
    }