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MathUtility.php
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1 <?php
2 namespace TYPO3\CMS\Core\Utility;
3 
4 /*
5  * This file is part of the TYPO3 CMS project.
6  *
7  * It is free software; you can redistribute it and/or modify it under
8  * the terms of the GNU General Public License, either version 2
9  * of the License, or any later version.
10  *
11  * For the full copyright and license information, please read the
12  * LICENSE.txt file that was distributed with this source code.
13  *
14  * The TYPO3 project - inspiring people to share!
15  */
16 
21 {
31  public static function forceIntegerInRange($theInt, $min, $max = 2000000000, $defaultValue = 0)
32  {
33  // Returns $theInt as an integer in the integerspace from $min to $max
34  $theInt = (int)$theInt;
35  // If the input value is zero after being converted to integer,
36  // defaultValue may set another default value for it.
37  if ($defaultValue && !$theInt) {
38  $theInt = $defaultValue;
39  }
40  if ($theInt < $min) {
41  $theInt = $min;
42  }
43  if ($theInt > $max) {
44  $theInt = $max;
45  }
46  return $theInt;
47  }
48 
55  public static function convertToPositiveInteger($theInt)
56  {
57  $theInt = (int)$theInt;
58  if ($theInt < 0) {
59  $theInt = 0;
60  }
61  return $theInt;
62  }
63 
73  public static function canBeInterpretedAsInteger($var)
74  {
75  if ($var === '' || is_object($var) || is_array($var)) {
76  return false;
77  }
78  return (string)(int)$var === (string)$var;
79  }
80 
90  public static function canBeInterpretedAsFloat($var)
91  {
92  $pattern_lnum = '[0-9]+';
93  $pattern_dnum = '([0-9]*[\.]' . $pattern_lnum . ')|(' . $pattern_lnum . '[\.][0-9]*)';
94  $pattern_exp_dnum = '[+-]?((' . $pattern_lnum . '|' . $pattern_dnum . ')([eE][+-]?' . $pattern_lnum . ')?)';
95 
96  if ($var === '' || is_object($var) || is_array($var)) {
97  return false;
98  }
99 
100  $matches = preg_match('/^' . $pattern_exp_dnum . '$/', $var);
101  return $matches === 1;
102  }
103 
111  public static function calculateWithPriorityToAdditionAndSubtraction($string)
112  {
113  // Removing all whitespace
114  $string = preg_replace('/[[:space:]]*/', '', $string);
115  // Ensuring an operator for the first entrance
116  $string = '+' . $string;
117  $qm = '\\*\\/\\+-^%';
118  $regex = '([' . $qm . '])([' . $qm . ']?[0-9\\.]*)';
119  // Split the expression here:
120  $reg = [];
121  preg_match_all('/' . $regex . '/', $string, $reg);
122  reset($reg[2]);
123  $number = 0;
124  $Msign = '+';
125  $err = '';
126  $buffer = (float)current($reg[2]);
127  // Advance pointer
128  $regSliced = array_slice($reg[2], 1, null, true);
129  foreach ($regSliced as $k => $v) {
130  $v = (float)$v;
131  $sign = $reg[1][$k];
132  if ($sign == '+' || $sign == '-') {
133  $Msign == '-' ? ($number -= $buffer) : ($number += $buffer);
134  $Msign = $sign;
135  $buffer = $v;
136  } else {
137  if ($sign == '/') {
138  if ($v) {
139  $buffer /= $v;
140  } else {
141  $err = 'dividing by zero';
142  }
143  }
144  if ($sign == '%') {
145  if ($v) {
146  $buffer %= $v;
147  } else {
148  $err = 'dividing by zero';
149  }
150  }
151  if ($sign == '*') {
152  $buffer *= $v;
153  }
154  if ($sign == '^') {
155  $buffer = pow($buffer, $v);
156  }
157  }
158  }
159  $number = $Msign == '-' ? ($number -= $buffer) : ($number += $buffer);
160  return $err ? 'ERROR: ' . $err : $number;
161  }
162 
170  public static function calculateWithParentheses($string)
171  {
172  $securC = 100;
173  do {
174  $valueLenO = strcspn($string, '(');
175  $valueLenC = strcspn($string, ')');
176  if ($valueLenC == strlen($string) || $valueLenC < $valueLenO) {
177  $value = self::calculateWithPriorityToAdditionAndSubtraction(substr($string, 0, $valueLenC));
178  $string = $value . substr($string, ($valueLenC + 1));
179  return $string;
180  } else {
181  $string = substr($string, 0, $valueLenO) . self::calculateWithParentheses(substr($string, ($valueLenO + 1)));
182  }
183  // Security:
184  $securC--;
185  if ($securC <= 0) {
186  break;
187  }
188  } while ($valueLenO < strlen($string));
189  return $string;
190  }
191 
200  public static function isIntegerInRange($value, $minimum, $maximum)
201  {
202  $value = filter_var($value, FILTER_VALIDATE_INT, [
203  'options' => [
204  'min_range' => $minimum,
205  'max_range' => $maximum
206  ]
207  ]);
208  $isInRange = is_int($value);
209  return $isInRange;
210  }
211 }
static calculateWithPriorityToAdditionAndSubtraction($string)
static calculateWithParentheses($string)
static forceIntegerInRange($theInt, $min, $max=2000000000, $defaultValue=0)
Definition: MathUtility.php:31
static isIntegerInRange($value, $minimum, $maximum)
static convertToPositiveInteger($theInt)
Definition: MathUtility.php:55