extends/hashids/Math/MathInterface.php

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<?php

/*
 * This file is part of Hashids.
 *
 * (c) Ivan Akimov <ivan@barreleye.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Hashids\Math;

/**
 * Interface for different math extensions.
 *
 * @author Vincent Klaiber <hello@vinkla.com>
 * @author Jakub Kramarz <lenwe@lenwe.net>
 * @author Johnson Page <jwpage@gmail.com>
 */
interface MathInterface
{
    /**
     * Add two arbitrary-length integers.
     *
     * @param string $a
     * @param string $b
     *
     * @return string
     */
    public function add($a, $b);

    /**
     * Multiply two arbitrary-length integers.
     *
     * @param string $a
     * @param string $b
     *
     * @return string
     */
    public function multiply($a, $b);

    /**
     * Divide two arbitrary-length integers.
     *
     * @param string $a
     * @param string $b
     *
     * @return string
     */
    public function divide($a, $b);

    /**
     * Compute arbitrary-length integer modulo.
     *
     * @param string $n
     * @param string $d
     *
     * @return string
     */