vendor/paragonie/random_compat/lib/cast_to_int.php

   1 <?php
   2 /**
   3  * Random_* Compatibility Library
   4  * for using the new PHP 7 random_* API in PHP 5 projects
   5  *
   6  * The MIT License (MIT)
   7  *
   8  * Copyright (c) 2015 - 2018 Paragon Initiative Enterprises
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  26  * SOFTWARE.
  27  */
  28
  29 if (!is_callable('RandomCompat_intval')) {
  30
  31     /**
  32      * Cast to an integer if we can, safely.
  33      *
  34      * If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX)
  35      * (non-inclusive), it will sanely cast it to an int. If you it's equal to
  36      * ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats
  37      * lose precision, so the <= and => operators might accidentally let a float
  38      * through.
  39      *
  40      * @param int|float $number    The number we want to convert to an int
  41      * @param bool      $fail_open Set to true to not throw an exception
  42      *
  43      * @return float|int
  44      * @psalm-suppress InvalidReturnType
  45      *
  46      * @throws TypeError
  47      */
  48     function RandomCompat_intval($number, $fail_open = false)
  49     {
  50         if (is_int($number) || is_float($number)) {
  51             $number += 0;
  52         } elseif (is_numeric($number)) {
  53             $number += 0;
  54         }
  55
  56         if (
  57             is_float($number)
  58             &&
  59             $number > ~PHP_INT_MAX
  60             &&
  61             $number < PHP_INT_MAX
  62         ) {
  63             $number = (int) $number;
  64         }
  65
  66         if (is_int($number)) {
  67             return (int) $number;
  68         } elseif (!$fail_open) {
  69             throw new TypeError(
  70                 'Expected an integer.'
  71             );
  72         }
  73         return $number;
  74     }
  75 }