function bnBitLength() {
  var this_array = this.array;
  if(this.t <= 0) return 0;
  return BI_DB*(this.t-1)+nbits(this_array[this.t-1]^(this.s&BI_DM));
}
function bnBitLength() {
  var this_array = this.array;
  if(this.t <= 0) return 0;
  return BI_DB*(this.t-1)+nbits(this_array[this.t-1]^(this.s&BI_DM));
}
function bnBitLength ( ) { var this_array = this . array ; if ( this . t <= 0 ) return 0 ; return BI_DB * ( this . t - 1 ) + nbits ( this_array [ this . t - 1 ] ^ ( this . s & BI_DM ) ) ; }
(public) return the number of bits in "this"
( public ) return the number of bits in this