TrueBV\Punycode::adapt PHP Method

    protected function adapt($delta, $numPoints, $firstTime)
    {
        $delta = (int) ($firstTime ? $delta / static::DAMP : $delta / 2);
        $delta += (int) ($delta / $numPoints);
        $k = 0;
        while ($delta > (static::BASE - static::TMIN) * static::TMAX / 2) {
            $delta = (int) ($delta / (static::BASE - static::TMIN));
            $k = $k + static::BASE;
        }
        $k = $k + (int) ((static::BASE - static::TMIN + 1) * $delta / ($delta + static::SKEW));
        return $k;
    }