<?php

/**

 * Random_* Compatibility Library

 * for using the new PHP 7 random_* API in PHP 5 projects

 *

 * The MIT License (MIT)

 *

 * Copyright (c) 2015 Paragon Initiative Enterprises

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 */

if (!function_exists('RandomCompat_intval')) {

    /**

     * Cast to an integer if we can, safely.

     * 

     * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)

     * (non-inclusive), it will sanely cast it to an int. If you it's equal to

     * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats 

     * lose precision, so the <= and => operators might accidentally let a float

     * through.

     * 

     * @param int|float $number    The number we want to convert to an int

     * @param boolean   $fail_open Set to true to not throw an exception

     * 

     * @return int (or float if $fail_open)

     *

     * @throws TypeError

     */

    function RandomCompat_intval($number, $fail_open = false)

    {

        if (is_numeric($number)) {

            $number += 0;

        }

        if (

            is_float($number)

            &&

            $number > ~PHP_INT_MAX

            &&

            $number < PHP_INT_MAX

        ) {

            $number = (int) $number;

        }

        if (is_int($number) || $fail_open) {

            return $number;

        }

        throw new TypeError(

            'Expected an integer.'

        );

    }

}