BinaryMath::makeNegative() - Code Metrics - Inspection of "KeyInterface: use \GMP" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#317)

by thomas

created 2016-06-17 17:55 UTC

BinaryMath::makeNegative() A

↳ Parent: BinaryMath

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	2
c	1
b	0
f	0
nc	1
nop	2
dl	0
loc	4
ccs	0
cts	2
cp	0
crap	2
rs	10

<?php

namespace BitWasp\Bitcoin\Math;

use Mdanter\Ecc\Math\GmpMathInterface;

class BinaryMath
{
    /**
     * @var GmpMathInterface
     */
    private $math;

    /**
     * @param GmpMathInterface $math
     */
    public function __construct(GmpMathInterface $math)
    {
        $this->math = $math;
    }

    /**
     * @param int $bitSize
     * @return int
     */
    private function fixSize($bitSize)
    {
        return $bitSize - 1;
    }

    /**
     * @param \GMP $integer
     * @param int $bitSize
     * @return bool
     */
    public function isNegative(\GMP $integer, $bitSize)
    {
        return $this->math->cmp($this->math->rightShift($integer, $this->fixSize($bitSize)), gmp_init(1)) === 0;
    }

    /**
     * @param \GMP $integer
     * @param int $bitSize
     * @return \GMP
     */
    public function makeNegative(\GMP $integer, $bitSize)
    {
        return $this->math->bitwiseXor($this->math->leftShift(gmp_init(1), $this->fixSize($bitSize)), $integer);
    }

    /**
     * @param \GMP $integer
     * @param int $bitSize
     * @return \GMP
     */
    public function getTwosComplement(\GMP $integer, $bitSize)
    {
        return $this->math->add($this->math->pow(gmp_init(2), $bitSize), $integer);
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Math;
4
5		use Mdanter\Ecc\Math\GmpMathInterface;
6
7		class BinaryMath
8		{
9		/**
10		* @var GmpMathInterface
11		*/
12		private $math;
13
14		/**
15		* @param GmpMathInterface $math
16		*/
17	21	public function __construct(GmpMathInterface $math)
18		{
19	21	$this->math = $math;
20	21	}
21
22		/**
23		* @param int $bitSize
24		* @return int
25		*/
26	21	private function fixSize($bitSize)
27		{
28	21	return $bitSize - 1;
29		}
30
31		/**
32		* @param \GMP $integer
33		* @param int $bitSize
34		* @return bool
35		*/
36	21	public function isNegative(\GMP $integer, $bitSize)
37		{
38	21	return $this->math->cmp($this->math->rightShift($integer, $this->fixSize($bitSize)), gmp_init(1)) === 0;
39		}
40
41		/**
42		* @param \GMP $integer
43		* @param int $bitSize
44		* @return \GMP
45		*/
46		public function makeNegative(\GMP $integer, $bitSize)
47		{
48		return $this->math->bitwiseXor($this->math->leftShift(gmp_init(1), $this->fixSize($bitSize)), $integer);
49		}
50
51		/**
52		* @param \GMP $integer
53		* @param int $bitSize
54		* @return \GMP
55		*/
56		public function getTwosComplement(\GMP $integer, $bitSize)
57		{
58		return $this->math->add($this->math->pow(gmp_init(2), $bitSize), $integer);
59		}
60		}
61

Bit-Wasp / bitcoin-php

Pull Request — master (#317)

BinaryMath::makeNegative() A

Complexity

Size

Duplication

Code Coverage

Importance

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