log2.php

Go to the documentation of this file.

<?php

namespace Complex;

if (!function_exists(__NAMESPACE__ . '\\log2')) {
    function log2($complex): Complex
    {
        $complex = Complex::validateComplexArgument($complex);

        if (($complex->getReal() == 0.0) && ($complex->getImaginary() == 0.0)) {
            throw new \InvalidArgumentException();
        } elseif (($complex->getReal() > 0.0) && ($complex->getImaginary() == 0.0)) {
            return new Complex(\log($complex->getReal(), 2), 0.0, $complex->getSuffix());
        }

        return ln($complex)
            ->multiply(\log(Complex::EULER, 2));
    }
}