Functions::nextPowerOf2() - Code Metrics - Inspection of ":memo: API documentation" - Heroyt/tournament-generator - Measure and Improve Code Quality continuously with Scrutinizer

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by Tomáš

created 2021-05-21 09:47 UTC

Functions::nextPowerOf2() A

↳ Parent: Functions

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	1
c	1
b	0
f	0
nc	1
nop	1
dl	0
loc	3
ccs	2
cts	2
cp	1
crap	1
rs	10

<?php


namespace TournamentGenerator\Helpers;


/**
 * Static helper functions
 *
 * @package TournamentGenerator\Helpers
 *
 * @author  Tomáš Vojík <[email protected]>
 *
 * @since   0.4
 */
class Functions
{
	/**
	 * Checks if the number is a power of 2
	 *
	 * @param int $x
	 *
	 * @return bool
	 */
	public static function isPowerOf2(int $x) : bool {
		return ($x !== 0) && ($x & ($x - 1)) === 0;
	}

	/**
	 * Get the next power of 2 larger than input
	 *
	 * @param int $x
	 *
	 * @return int
	 */
	public static function nextPowerOf2(int $x) : int {
		// Left bit shift by the bit length of the previous number
		return 1 << strlen(decbin($x));
	}

	/**
	 * Get the previous power of 2 smaller or equal than input
	 *
	 * @param int $x
	 *
	 * @return int
	 */
	public static function previousPowerOf2(int $x) : int {
		// Left bit shift by the bit length of the previous number
		return 1 << (strlen(decbin($x)) - 1);
	}
}

1		<?php
2
3
4		namespace TournamentGenerator\Helpers;
5
6
7		/**
8		* Static helper functions
9		*
10		* @package TournamentGenerator\Helpers
11		*
12		* @author Tomáš Vojík <[email protected]>
13		*
14		* @since 0.4
15		*/
16		class Functions
17		{
18		/**
19		* Checks if the number is a power of 2
20		*
21		* @param int $x
22		*
23		* @return bool
24		*/
25	11	public static function isPowerOf2(int $x) : bool {
26	11	return ($x !== 0) && ($x & ($x - 1)) === 0;
27		}
28
29		/**
30		* Get the next power of 2 larger than input
31		*
32		* @param int $x
33		*
34		* @return int
35		*/
36	9	public static function nextPowerOf2(int $x) : int {
37		// Left bit shift by the bit length of the previous number
38	9	return 1 << strlen(decbin($x));
39		}
40
41		/**
42		* Get the previous power of 2 smaller or equal than input
43		*
44		* @param int $x
45		*
46		* @return int
47		*/
48	9	public static function previousPowerOf2(int $x) : int {
49		// Left bit shift by the bit length of the previous number
50	9	return 1 << (strlen(decbin($x)) - 1);
51		}
52		}

Heroyt / tournament-generator

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Functions::nextPowerOf2() A

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