<?php
/**
 * Random_* Compatibility Library
 * for using the new PHP 7 random_* API in PHP 5 projects
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 - 2017 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.
 */
defined('BASEPATH') OR exit('No direct script access allowed');

if (!is_callable('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 bool      $fail_open Set to true to not throw an exception
	 * 
	 * @return float|int
	 * @psalm-suppress InvalidReturnType
	 *
	 * @throws TypeError
	 */
	function RandomCompat_intval($number, $fail_open = false)
	{
		if (is_int($number) OR is_float($number))
		{
			$number += 0;
		}
		elseif (is_numeric($number))
		{
			$number += 0;
		}
		
		if (is_float($number) && $number > ~PHP_INT_MAX && $number < PHP_INT_MAX)
		{
			$number = (int) $number;
		}
		
		if (is_int($number))
		{
			return (int) $number;
		}
		elseif (!$fail_open)
		{
			throw new TypeError('Expected an integer.');
		}
		return $number;
	}
}
