lib/BN.php
public function setn($bit, $val) {
        assert(is_integer($bit) && $bit > 0);
        $this->bi = $this->bi->setbit($bit, !!$val);
        return $this;
    }
public function setn($bit, $val) {
        assert(is_integer($bit) && $bit > 0);
        $this->bi = $this->bi->setbit($bit, !!$val);
        return $this;
    }
public function setn ( $ bit , $ val ) { assert ( is_integer ( $ bit ) && $ bit > 0 ) ; $ this -> bi = $ this -> bi -> setbit ( $ bit , ! ! $ val ) ; return $ this ; }
Set `bit` of `this`
Set bit of this