BC - Code Metrics - Inspection of "Add hexdec() and dechex() functions" - krowinski/bcmath-extended - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#25)

unknown

created 2018-09-13 07:04 UTC

BC F

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	593
Duplicated Lines	22.93 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

Metric	Value
wmc	82
lcom	1
cbo	0
dl	136
loc	593
ccs	233
cts	233
cp	1
rs	2
c	0
b	0
f	0

32 Methods

Rating	Name	Duplication	Size	Complexity
A	setScale()	0	4	1
A	round()	0	13	3
A	convertScientificNotationToString()	0	20	4
A	getDecimalsLengthFromNumber()	0	9	2
A	pow()	0	19	4
A	checkIsFloat()	0	4	1
A	powFractional()	0	21	2
A	checkNumber()	0	9	3
A	mul()	11	11	2
A	exp()	0	10	2
A	add()	11	11	2
A	div()	11	11	2
A	log()	0	28	5
A	comp()	0	15	2
A	sub()	11	11	2
A	isNegative()	0	4	1
A	abs()	0	10	2
A	rand()	0	10	1
A	max()	18	18	5
A	min()	18	18	5
A	roundDown()	15	15	2
A	floor()	13	13	4
A	checkIsFloatCleanZeros()	0	4	1
A	roundUp()	15	15	2
A	ceil()	13	13	4
A	getScale()	0	6	1
A	sqrt()	0	10	2
A	mod()	0	16	2
A	powMod()	0	17	5
A	fact()	0	18	4
A	hexdec()	0	10	2
A	dechex()	0	10	2

How to fix Duplicated Code Complexity

Duplicated Code

Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.

Common duplication problems, and corresponding solutions are:

If you have the same expression in different places: Extract expression to a method
If you have the same method in different sub-classes: Extract method, and pull up field to the parent class
If you have the same code in unrelated classes: Consider extracting the code to a new class, and injecting that class

Complex Class

Tip: Before tackling complexity, make sure that you eliminate any duplication first. This often can reduce the size of classes significantly.

Complex classes like BC often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

While breaking up the class, it is a good idea to analyze how other classes use BC, and based on these observations, apply Extract Interface, too.

<?php

namespace BCMathExtended;

/**
 * Class BC
 * @package BCMathExtended
 */
class BC
{
    const COMPARE_EQUAL = 0;
    const COMPARE_LEFT_GRATER = 1;
    const COMPARE_RIGHT_GRATER = -1;
    const DEFAULT_SCALE = 100;

    /**
     * @param null|int $scale
     */
    public static function setScale($scale)
    {
        bcscale($scale);
    }

    /**
     * @param int|string $number
     * @param int $precision
     * @return string
     */
    public static function round($number, $precision = 0)
    {
        $number = self::convertScientificNotationToString($number);
        if (self::checkIsFloat($number)) {
            if (self::isNegative($number)) {
                return self::sub($number, '0.' . str_repeat('0', $precision) . '5', $precision);
            }

            return self::add($number, '0.' . str_repeat('0', $precision) . '5', $precision);
        }

        return self::checkNumber($number);
    }

    /**
     * @param int|string|float $number
     * @return string
     */
    public static function convertScientificNotationToString($number)
    {
        // check if number is in scientific notation, first use stripos as is faster then preg_match
        if (false !== stripos($number, 'E') && preg_match('/(-?(\d+\.)?\d+)E([+-]?)(\d+)/i', $number, $regs)) {
            // calculate final scale of number
            $scale = $regs[4] + self::getDecimalsLengthFromNumber($regs[1]);
            $pow = self::pow(10, $regs[4], $scale);
            if ('-' === $regs[3]) {
                $number = self::div($regs[1], $pow, $scale);
            } else {
                $number = self::mul($pow, $regs[1], $scale);
            }
            // remove unnecessary 0 from 0.000 is a 0
            $number = rtrim($number, '0');
            // if you remove 0 you must clean dot
            $number = rtrim($number, '.');
        }

        return self::checkNumber($number);
    }

    /**
     * @param int|string|float $number
     * @return int
     */
    public static function getDecimalsLengthFromNumber($number)
    {
        $check = explode('.', $number);
        if (!empty($check[1])) {
            return strlen($check[1]);
        }

        return 0;
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    public static function pow($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (self::checkIsFloat($rightOperand)) {
            if (null === $scale) {
                return self::powFractional($leftOperand, $rightOperand);
            }

            return self::powFractional($leftOperand, $rightOperand, $scale);
        }

        if (null === $scale) {
            return bcpow($leftOperand, $rightOperand);
        }

        return bcpow($leftOperand, $rightOperand, $scale);
    }

    /**
     * @param int|string $number
     * @return bool
     */
    private static function checkIsFloat($number)
    {
        return false !== strpos($number, '.');
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    private static function powFractional($leftOperand, $rightOperand, $scale = null)
    {
        // we need to increased scale to get correct results and avoid rounding error
        $increasedScale = null === $scale ? self::getScale() : $scale;
        $increasedScale *= 2;
        $decimals = explode('.', $rightOperand);

        return self::checkNumber(
            self::mul(
                self::exp(
                    self::mul(
                        self::log($leftOperand),
                        '0.' . $decimals[1],
                        $increasedScale
                    )
                ),
                self::pow($leftOperand, $decimals[0], $increasedScale),
                $scale
            )
        );
    }

    /**
     * @param int|string $number
     * @return int|string
     */
    private static function checkNumber($number)
    {
        $number = str_replace('+', '', filter_var($number, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION));
        if ('-0' === $number || !is_numeric($number)) {
            return '0';
        }

        return $number;
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    public static function mul($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (null === $scale) {
            return bcmul($leftOperand, $rightOperand);
        }

        return bcmul($leftOperand, $rightOperand, $scale);
    }

    /**
     * @param string $arg
     * @return string
     */
    public static function exp($arg)
    {
        $scale = self::DEFAULT_SCALE;
        $result = '1';
        for ($i = 299; $i > 0; $i--) {
            $result = self::add(self::mul(self::div($result, $i, $scale), $arg, $scale), 1, $scale);
        }

        return $result;
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    public static function add($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (null === $scale) {
            return bcadd($leftOperand, $rightOperand);
        }

        return bcadd($leftOperand, $rightOperand, $scale);
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    public static function div($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (null === $scale) {
            return bcdiv($leftOperand, $rightOperand);
        }

        return bcdiv($leftOperand, $rightOperand, $scale);
    }

    /**
     * @param string $arg
     * @return string
     */
    public static function log($arg)
    {
        $arg = self::convertScientificNotationToString($arg);
        if ($arg === '0') {
            return '-INF';
        }
        if (self::COMPARE_RIGHT_GRATER === self::comp($arg, '0')) {
            return 'NAN';
        }
        $scale = self::DEFAULT_SCALE;
        $m = (string)log($arg);
        $x = self::sub(self::div($arg, self::exp($m), $scale), '1', $scale);
        $res = '0';
        $pow = '1';
        $i = 1;
        do {
            $pow = self::mul($pow, $x, $scale);
            $sum = self::div($pow, $i, $scale);
            if ($i % 2 === 1) {
                $res = self::add($res, $sum, $scale);
            } else {
                $res = self::sub($res, $sum, $scale);
            }
            $i++;
        } while (self::comp($sum, '0', $scale));

        return self::add($res, $m, $scale);
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return int
     */
    public static function comp($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (null === $scale) {
            return bccomp($leftOperand, $rightOperand, max(strlen($leftOperand), strlen($rightOperand)));
        }

        return bccomp(
            $leftOperand,
            $rightOperand,
            $scale
        );
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param null|int $scale
     * @return string
     */
    public static function sub($leftOperand, $rightOperand, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        if (null === $scale) {
            return bcsub($leftOperand, $rightOperand);
        }

        return bcsub($leftOperand, $rightOperand, $scale);
    }

    /**
     * @param $number
     * @return bool
     */
    private static function isNegative($number)
    {
        return 0 === strncmp('-', $number, 1);
    }

    /**
     * @param int|string $number
     * @return string
     */
    public static function abs($number)
    {
        $number = self::convertScientificNotationToString($number);

        if (self::isNegative($number)) {
            $number = (string)substr($number, 1);
        }

        return self::checkNumber($number);
    }

    /**
     * @param int|string $min
     * @param int|string $max
     * @return string
     */
    public static function rand($min, $max)
    {
        $max = self::convertScientificNotationToString($max);
        $min = self::convertScientificNotationToString($min);

        $difference = self::add(self::sub($max, $min), 1);
        $randPercent = self::div(mt_rand(), mt_getrandmax(), 8);

        return self::add($min, self::mul($difference, $randPercent, 8), 0);
    }

    /**
     * @param array|int|string,...
     * @return null|string
     */
    public static function max()

    {
        $max = null;
        $args = func_get_args();
        if (is_array($args[0])) {
            $args = $args[0];
        }
        foreach ($args as $number) {
            $number = self::convertScientificNotationToString($number);
            if (null === $max) {
                $max = $number;
            } else if (self::comp($max, $number) === self::COMPARE_RIGHT_GRATER) {
                $max = $number;
            }
        }

        return $max;
    }

    /**
     * @param array|int|string,...
     * @return null|string
     */
    public static function min()

    {
        $min = null;
        $args = func_get_args();
        if (is_array($args[0])) {
            $args = $args[0];
        }
        foreach ($args as $number) {
            $number = self::convertScientificNotationToString($number);
            if (null === $min) {
                $min = $number;
            } else if (self::comp($min, $number) === self::COMPARE_LEFT_GRATER) {
                $min = $number;
            }
        }

        return $min;
    }

    /**
     * @param int|string $number
     * @param int $precision
     * @return string
     */
    public static function roundDown($number, $precision = 0)

    {
        $number = self::convertScientificNotationToString($number);
        $multiply = self::pow(10, (string)abs($precision));

        return $precision < 0 ?
            self::mul(
                self::floor(self::div($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
                $precision
            ) :
            self::div(
                self::floor(self::mul($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
                $precision
            );
    }

    /**
     * @param int|string $number
     * @return string
     */
    public static function floor($number)

    {
        $number = self::convertScientificNotationToString($number);
        if (self::checkIsFloat($number) && self::checkIsFloatCleanZeros($number)) {
            $result = 0;
            if (self::isNegative($number)) {
                --$result;
            }
            $number = self::add($number, $result, 0);
        }

        return self::checkNumber($number);
    }

    /**
     * @param int|string $number
     * @return bool
     */
    private static function checkIsFloatCleanZeros(&$number)
    {
        return false !== strpos($number = rtrim(rtrim($number, '0'), '.'), '.');
    }

    /**
     * @param int|string $number
     * @param int $precision
     * @return string
     */
    public static function roundUp($number, $precision = 0)

    {
        $number = self::convertScientificNotationToString($number);
        $multiply = self::pow(10, (string)abs($precision));

        return $precision < 0 ?
            self::mul(
                self::ceil(self::div($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
                $precision
            ) :
            self::div(
                self::ceil(self::mul($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
                $precision
            );
    }

    /**
     * @param int|string $number
     * @return string
     */
    public static function ceil($number)

    {
        $number = self::convertScientificNotationToString($number);
        if (self::checkIsFloat($number) && self::checkIsFloatCleanZeros($number)) {
            $result = 1;
            if (self::isNegative($number)) {
                --$result;
            }
            $number = self::add($number, $result, 0);
        }

        return self::checkNumber($number);
    }

    /**
     * @return int
     */
    public static function getScale()
    {
        $sqrt = self::sqrt('2');

        return strlen(substr($sqrt, strpos($sqrt, '.') + 1));
    }

    /**
     * @param string $operand
     * @param null|int $scale
     * @return string
     */
    public static function sqrt($operand, $scale = null)
    {
        $operand = self::convertScientificNotationToString($operand);

        if (null === $scale) {
            return bcsqrt($operand);
        }

        return bcsqrt($operand, $scale);
    }

    /**
     * @param string $leftOperand
     * @param string $modulus
     * @param null $scale
     * @return string
     */
    public static function mod($leftOperand, $modulus, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);

        // bcmod in 7.2 is not working properly - for example bcmod(9.9999E-10, -0.00056, 9) should return '-0.000559999' but returns 0.0000000

        // bcmod in php 5.6< don't support scale and floats
        // let use this $x - floor($x/$y) * $y;
        if (null === $scale) {
            return self::sub($leftOperand, self::mul(self::floor(self::div($leftOperand, $modulus)), $modulus));
        }

        return self::sub(
            $leftOperand, self::mul(self::floor(self::div($leftOperand, $modulus, $scale)), $modulus, $scale), $scale
        );
    }

    /**
     * @param string $leftOperand
     * @param string $rightOperand
     * @param string $modulus
     * @param null|int $scale
     * @return string
     */
    public static function powMod($leftOperand, $rightOperand, $modulus, $scale = null)
    {
        $leftOperand = self::convertScientificNotationToString($leftOperand);
        $rightOperand = self::convertScientificNotationToString($rightOperand);

        // bcpowmod in 5.6 have don't calculate correct results if scale is empty
        if (null === $scale) {
            return self::mod(self::pow($leftOperand, $rightOperand), $modulus);
        }

        // cant use bcpowmod here as it don't support floats
        if (self::checkIsFloat($leftOperand) || self::checkIsFloat($rightOperand) || self::checkIsFloat($modulus)) {
            return self::mod(self::pow($leftOperand, $rightOperand, $scale), $modulus, $scale);
        }

        return bcpowmod($leftOperand, $rightOperand, $modulus, $scale);
    }

    /**
     * @param string $arg
     * @return string
     * @throws \InvalidArgumentException
     */
    public static function fact($arg)
    {
        $arg = self::convertScientificNotationToString($arg);

        if (self::checkIsFloat($arg)) {
            throw new \InvalidArgumentException('Number has to be an integer');
        }
        if (self::isNegative($arg)) {
            throw new \InvalidArgumentException('Number has to be greater than or equal to 0');
        }

        $return = '1';
        for ($i = 2; $i <= $arg; ++$i) {
            $return = self::mul($return, $i);
        }

        return $return;
    }

    /**
     * @param string $hex
     * @return string
     */
    public static function hexdec($hex) {
        $remainingDigits = substr($hex, 0, -1);
        $lastDigitToDecimal = \hexdec(substr($hex, -1));

        if (strlen($remainingDigits) === 0) {
            return $lastDigitToDecimal;
        }

        return self::add(self::mul(16, self::hexdec($remainingDigits)), $lastDigitToDecimal, 0);
    }

    /**
     * @param int $decimal
     * @return string
     */
    public static function dechex($decimal) {
        $quotient = self::div($decimal, 16, 0);
        $remainderToHex = \dechex(self::mod($decimal, 16));

        if (self::comp($quotient, 0) === 0) {
            return $remainderToHex;
        }

        return self::dechex($quotient) . $remainderToHex;
    }
}


1			<?php
2
3			namespace BCMathExtended;
4
5			/**
6			* Class BC
7			* @package BCMathExtended
8			*/
9			class BC
10			{
11			const COMPARE_EQUAL = 0;
12			const COMPARE_LEFT_GRATER = 1;
13			const COMPARE_RIGHT_GRATER = -1;
14			const DEFAULT_SCALE = 100;
15
16			/**
17			* @param null\|int $scale
18			*/
19	323		public static function setScale($scale)
20			{
21	323		bcscale($scale);
22	323		}
23
24			/**
25			* @param int\|string $number
26			* @param int $precision
27			* @return string
28			*/
29	47		public static function round($number, $precision = 0)
30			{
31	47		$number = self::convertScientificNotationToString($number);
32	47		if (self::checkIsFloat($number)) {
33	36		if (self::isNegative($number)) {
34	4		return self::sub($number, '0.' . str_repeat('0', $precision) . '5', $precision);
35			}
36
37	32		return self::add($number, '0.' . str_repeat('0', $precision) . '5', $precision);
38			}
39
40	11		return self::checkNumber($number);
41			}
42
43			/**
44			* @param int\|string\|float $number
45			* @return string
46			*/
47	323		public static function convertScientificNotationToString($number)
48			{
49			// check if number is in scientific notation, first use stripos as is faster then preg_match
50	323		if (false !== stripos($number, 'E') && preg_match('/(-?(\d+\.)?\d+)E([+-]?)(\d+)/i', $number, $regs)) {
51			// calculate final scale of number
52	59		$scale = $regs[4] + self::getDecimalsLengthFromNumber($regs[1]);
53	59		$pow = self::pow(10, $regs[4], $scale);
54	59		if ('-' === $regs[3]) {
55	25		$number = self::div($regs[1], $pow, $scale);
56			} else {
57	34		$number = self::mul($pow, $regs[1], $scale);
58			}
59			// remove unnecessary 0 from 0.000 is a 0
60	59		$number = rtrim($number, '0');
61			// if you remove 0 you must clean dot
62	59		$number = rtrim($number, '.');
63			}
64
65	323		return self::checkNumber($number);
66			}
67
68			/**
69			* @param int\|string\|float $number
70			* @return int
71			*/
72	91		public static function getDecimalsLengthFromNumber($number)
73			{
74	91		$check = explode('.', $number);
75	91		if (!empty($check[1])) {
76	62		return strlen($check[1]);
77			}
78
79	29		return 0;
80			}
81
82			/**
83			* @param string $leftOperand
84			* @param string $rightOperand
85			* @param null\|int $scale
86			* @return string
87			*/
88	111		public static function pow($leftOperand, $rightOperand, $scale = null)
89			{
90	111		$leftOperand = self::convertScientificNotationToString($leftOperand);
91	111		$rightOperand = self::convertScientificNotationToString($rightOperand);
92
93	111		if (self::checkIsFloat($rightOperand)) {
94	7		if (null === $scale) {
95	2		return self::powFractional($leftOperand, $rightOperand);
96			}
97
98	5		return self::powFractional($leftOperand, $rightOperand, $scale);
99			}
100
101	111		if (null === $scale) {
102	39		return bcpow($leftOperand, $rightOperand);
103			}
104
105	75		return bcpow($leftOperand, $rightOperand, $scale);
106			}
107
108			/**
109			* @param int\|string $number
110			* @return bool
111			*/
112	221		private static function checkIsFloat($number)
113			{
114	221		return false !== strpos($number, '.');
115			}
116
117			/**
118			* @param string $leftOperand
119			* @param string $rightOperand
120			* @param null\|int $scale
121			* @return string
122			*/
123	7		private static function powFractional($leftOperand, $rightOperand, $scale = null)
124			{
125			// we need to increased scale to get correct results and avoid rounding error
126	7		$increasedScale = null === $scale ? self::getScale() : $scale;
127	7		$increasedScale *= 2;
128	7		$decimals = explode('.', $rightOperand);
129
130	7		return self::checkNumber(
131	7		self::mul(
132	7		self::exp(
133	7		self::mul(
134	7		self::log($leftOperand),
135	7		'0.' . $decimals[1],
136	7		$increasedScale
137			)
138			),
139	7		self::pow($leftOperand, $decimals[0], $increasedScale),
140	7		$scale
141			)
142			);
143			}
144
145			/**
146			* @param int\|string $number
147			* @return int\|string
148			*/
149	323		private static function checkNumber($number)
150			{
151	323		$number = str_replace('+', '', filter_var($number, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION));
152	323		if ('-0' === $number \|\| !is_numeric($number)) {
153	28		return '0';
154			}
155
156	320		return $number;
157			}
158
159			/**
160			* @param string $leftOperand
161			* @param string $rightOperand
162			* @param null\|int $scale
163			* @return string
164			*/
165	131	View Code Duplication	public static function mul($leftOperand, $rightOperand, $scale = null)
166			{
167	131		$leftOperand = self::convertScientificNotationToString($leftOperand);
168	131		$rightOperand = self::convertScientificNotationToString($rightOperand);
169
170	131		if (null === $scale) {
171	25		return bcmul($leftOperand, $rightOperand);
172			}
173
174	108		return bcmul($leftOperand, $rightOperand, $scale);
175			}
176
177			/**
178			* @param string $arg
179			* @return string
180			*/
181	15		public static function exp($arg)
182			{
183	15		$scale = self::DEFAULT_SCALE;
184	15		$result = '1';
185	15		for ($i = 299; $i > 0; $i--) {
186	15		$result = self::add(self::mul(self::div($result, $i, $scale), $arg, $scale), 1, $scale);
187			}
188
189	15		return $result;
190			}
191
192			/**
193			* @param string $leftOperand
194			* @param string $rightOperand
195			* @param null\|int $scale
196			* @return string
197			*/
198	125	View Code Duplication	public static function add($leftOperand, $rightOperand, $scale = null)
199			{
200	125		$leftOperand = self::convertScientificNotationToString($leftOperand);
201	125		$rightOperand = self::convertScientificNotationToString($rightOperand);
202
203	125		if (null === $scale) {
204	6		return bcadd($leftOperand, $rightOperand);
205			}
206
207	122		return bcadd($leftOperand, $rightOperand, $scale);
208			}
209
210			/**
211			* @param string $leftOperand
212			* @param string $rightOperand
213			* @param null\|int $scale
214			* @return string
215			*/
216	97	View Code Duplication	public static function div($leftOperand, $rightOperand, $scale = null)
217			{
218	97		$leftOperand = self::convertScientificNotationToString($leftOperand);
219	97		$rightOperand = self::convertScientificNotationToString($rightOperand);
220
221	97		if (null === $scale) {
222	12		return bcdiv($leftOperand, $rightOperand);
223			}
224
225	93		return bcdiv($leftOperand, $rightOperand, $scale);
226			}
227
228			/**
229			* @param string $arg
230			* @return string
231			*/
232	12		public static function log($arg)
233			{
234	12		$arg = self::convertScientificNotationToString($arg);
235	12		if ($arg === '0') {
236	1		return '-INF';
237			}
238	11		if (self::COMPARE_RIGHT_GRATER === self::comp($arg, '0')) {
239	1		return 'NAN';
240			}
241	10		$scale = self::DEFAULT_SCALE;
242	10		$m = (string)log($arg);
243	10		$x = self::sub(self::div($arg, self::exp($m), $scale), '1', $scale);
244	10		$res = '0';
245	10		$pow = '1';
246	10		$i = 1;
247			do {
248	10		$pow = self::mul($pow, $x, $scale);
249	10		$sum = self::div($pow, $i, $scale);
250	10		if ($i % 2 === 1) {
251	10		$res = self::add($res, $sum, $scale);
252			} else {
253	9		$res = self::sub($res, $sum, $scale);
254			}
255	10		$i++;
256	10		} while (self::comp($sum, '0', $scale));
257
258	10		return self::add($res, $m, $scale);
259			}
260
261			/**
262			* @param string $leftOperand
263			* @param string $rightOperand
264			* @param null\|int $scale
265			* @return int
266			*/
267	31		public static function comp($leftOperand, $rightOperand, $scale = null)
268			{
269	31		$leftOperand = self::convertScientificNotationToString($leftOperand);
270	31		$rightOperand = self::convertScientificNotationToString($rightOperand);
271
272	31		if (null === $scale) {
273	20		return bccomp($leftOperand, $rightOperand, max(strlen($leftOperand), strlen($rightOperand)));
274			}
275
276	21		return bccomp(
277	21		$leftOperand,
278	21		$rightOperand,
279	21		$scale
280			);
281			}
282
283			/**
284			* @param string $leftOperand
285			* @param string $rightOperand
286			* @param null\|int $scale
287			* @return string
288			*/
289	45	View Code Duplication	public static function sub($leftOperand, $rightOperand, $scale = null)
290			{
291	45		$leftOperand = self::convertScientificNotationToString($leftOperand);
292	45		$rightOperand = self::convertScientificNotationToString($rightOperand);
293
294	45		if (null === $scale) {
295	14		return bcsub($leftOperand, $rightOperand);
296			}
297
298	33		return bcsub($leftOperand, $rightOperand, $scale);
299			}
300
301			/**
302			* @param $number
303			* @return bool
304			*/
305	118		private static function isNegative($number)
306			{
307	118		return 0 === strncmp('-', $number, 1);
308			}
309
310			/**
311			* @param int\|string $number
312			* @return string
313			*/
314	15		public static function abs($number)
315			{
316	15		$number = self::convertScientificNotationToString($number);
317
318	15		if (self::isNegative($number)) {
319	8		$number = (string)substr($number, 1);
320			}
321
322	15		return self::checkNumber($number);
323			}
324
325			/**
326			* @param int\|string $min
327			* @param int\|string $max
328			* @return string
329			*/
330	2		public static function rand($min, $max)
331			{
332	2		$max = self::convertScientificNotationToString($max);
333	2		$min = self::convertScientificNotationToString($min);
334
335	2		$difference = self::add(self::sub($max, $min), 1);
336	2		$randPercent = self::div(mt_rand(), mt_getrandmax(), 8);
337
338	2		return self::add($min, self::mul($difference, $randPercent, 8), 0);
339			}
340
341			/**
342			* @param array\|int\|string,...
343			* @return null\|string
344			*/
345	1	View Code Duplication	public static function max()
			0 ignored issues – show Duplication introduced 2016-11-21 09:18 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
346			{
347	1		$max = null;
348	1		$args = func_get_args();
349	1		if (is_array($args[0])) {
350	1		$args = $args[0];
351			}
352	1		foreach ($args as $number) {
353	1		$number = self::convertScientificNotationToString($number);
354	1		if (null === $max) {
355	1		$max = $number;
356	1		} else if (self::comp($max, $number) === self::COMPARE_RIGHT_GRATER) {
357	1		$max = $number;
358			}
359			}
360
361	1		return $max;
362			}
363
364			/**
365			* @param array\|int\|string,...
366			* @return null\|string
367			*/
368	1	View Code Duplication	public static function min()
			0 ignored issues – show Duplication introduced 2016-11-21 09:18 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
369			{
370	1		$min = null;
371	1		$args = func_get_args();
372	1		if (is_array($args[0])) {
373	1		$args = $args[0];
374			}
375	1		foreach ($args as $number) {
376	1		$number = self::convertScientificNotationToString($number);
377	1		if (null === $min) {
378	1		$min = $number;
379	1		} else if (self::comp($min, $number) === self::COMPARE_LEFT_GRATER) {
380	1		$min = $number;
381			}
382			}
383
384	1		return $min;
385			}
386
387			/**
388			* @param int\|string $number
389			* @param int $precision
390			* @return string
391			*/
392	17	View Code Duplication	public static function roundDown($number, $precision = 0)
			0 ignored issues – show Duplication introduced 2017-08-23 11:59 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
393			{
394	17		$number = self::convertScientificNotationToString($number);
395	17		$multiply = self::pow(10, (string)abs($precision));
396
397	17		return $precision < 0 ?
398	4		self::mul(
399	4		self::floor(self::div($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
400	4		$precision
401			) :
402	13		self::div(
403	13		self::floor(self::mul($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
404	17		$precision
405			);
406			}
407
408			/**
409			* @param int\|string $number
410			* @return string
411			*/
412	65	View Code Duplication	public static function floor($number)
			0 ignored issues – show Duplication introduced 2016-11-21 09:18 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
413			{
414	65		$number = self::convertScientificNotationToString($number);
415	65		if (self::checkIsFloat($number) && self::checkIsFloatCleanZeros($number)) {
416	38		$result = 0;
417	38		if (self::isNegative($number)) {
418	7		--$result;
419			}
420	38		$number = self::add($number, $result, 0);
421			}
422
423	65		return self::checkNumber($number);
424			}
425
426			/**
427			* @param int\|string $number
428			* @return bool
429			*/
430	68		private static function checkIsFloatCleanZeros(&$number)
431			{
432	68		return false !== strpos($number = rtrim(rtrim($number, '0'), '.'), '.');
433			}
434
435			/**
436			* @param int\|string $number
437			* @param int $precision
438			* @return string
439			*/
440	17	View Code Duplication	public static function roundUp($number, $precision = 0)
			0 ignored issues – show Duplication introduced 2017-08-23 11:59 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
441			{
442	17		$number = self::convertScientificNotationToString($number);
443	17		$multiply = self::pow(10, (string)abs($precision));
444
445	17		return $precision < 0 ?
446	4		self::mul(
447	4		self::ceil(self::div($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
448	4		$precision
449			) :
450	13		self::div(
451	13		self::ceil(self::mul($number, $multiply, self::getDecimalsLengthFromNumber($number))), $multiply,
452	17		$precision
453			);
454			}
455
456			/**
457			* @param int\|string $number
458			* @return string
459			*/
460	41	View Code Duplication	public static function ceil($number)
			0 ignored issues – show Duplication introduced 2016-11-21 09:18 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
461			{
462	41		$number = self::convertScientificNotationToString($number);
463	41		if (self::checkIsFloat($number) && self::checkIsFloatCleanZeros($number)) {
464	22		$result = 1;
465	22		if (self::isNegative($number)) {
466	5		--$result;
467			}
468	22		$number = self::add($number, $result, 0);
469			}
470
471	41		return self::checkNumber($number);
472			}
473
474			/**
475			* @return int
476			*/
477	5		public static function getScale()
478			{
479	5		$sqrt = self::sqrt('2');
480
481	5		return strlen(substr($sqrt, strpos($sqrt, '.') + 1));
482			}
483
484			/**
485			* @param string $operand
486			* @param null\|int $scale
487			* @return string
488			*/
489	10		public static function sqrt($operand, $scale = null)
490			{
491	10		$operand = self::convertScientificNotationToString($operand);
492
493	10		if (null === $scale) {
494	6		return bcsqrt($operand);
495			}
496
497	5		return bcsqrt($operand, $scale);
498			}
499
500			/**
501			* @param string $leftOperand
502			* @param string $modulus
503			* @param null $scale
504			* @return string
505			*/
506	23		public static function mod($leftOperand, $modulus, $scale = null)
507			{
508	23		$leftOperand = self::convertScientificNotationToString($leftOperand);
509
510			// bcmod in 7.2 is not working properly - for example bcmod(9.9999E-10, -0.00056, 9) should return '-0.000559999' but returns 0.0000000
511
512			// bcmod in php 5.6< don't support scale and floats
513			// let use this $x - floor($x/$y) * $y;
514	23		if (null === $scale) {
515	11		return self::sub($leftOperand, self::mul(self::floor(self::div($leftOperand, $modulus)), $modulus));
516			}
517
518	12		return self::sub(
519	12		$leftOperand, self::mul(self::floor(self::div($leftOperand, $modulus, $scale)), $modulus, $scale), $scale
520			);
521			}
522
523			/**
524			* @param string $leftOperand
525			* @param string $rightOperand
526			* @param string $modulus
527			* @param null\|int $scale
528			* @return string
529			*/
530	10		public static function powMod($leftOperand, $rightOperand, $modulus, $scale = null)
531			{
532	10		$leftOperand = self::convertScientificNotationToString($leftOperand);
533	10		$rightOperand = self::convertScientificNotationToString($rightOperand);
534
535			// bcpowmod in 5.6 have don't calculate correct results if scale is empty
536	10		if (null === $scale) {
537	4		return self::mod(self::pow($leftOperand, $rightOperand), $modulus);
538			}
539
540			// cant use bcpowmod here as it don't support floats
541	6		if (self::checkIsFloat($leftOperand) \|\| self::checkIsFloat($rightOperand) \|\| self::checkIsFloat($modulus)) {
542	2		return self::mod(self::pow($leftOperand, $rightOperand, $scale), $modulus, $scale);
543			}
544
545	4		return bcpowmod($leftOperand, $rightOperand, $modulus, $scale);
546			}
547
548			/**
549			* @param string $arg
550			* @return string
551			* @throws \InvalidArgumentException
552			*/
553	8		public static function fact($arg)
554			{
555	8		$arg = self::convertScientificNotationToString($arg);
556
557	8		if (self::checkIsFloat($arg)) {
558	1		throw new \InvalidArgumentException('Number has to be an integer');
559			}
560	7		if (self::isNegative($arg)) {
561	1		throw new \InvalidArgumentException('Number has to be greater than or equal to 0');
562			}
563
564	6		$return = '1';
565	6		for ($i = 2; $i <= $arg; ++$i) {
566	5		$return = self::mul($return, $i);
567			}
568
569	6		return $return;
570			}
571
572			/**
573			* @param string $hex
574			* @return string
575			*/
576	5		public static function hexdec($hex) {
577	5		$remainingDigits = substr($hex, 0, -1);
578	5		$lastDigitToDecimal = \hexdec(substr($hex, -1));
579
580	5		if (strlen($remainingDigits) === 0) {
581	5		return $lastDigitToDecimal;
582			}
583
584	5		return self::add(self::mul(16, self::hexdec($remainingDigits)), $lastDigitToDecimal, 0);
585			}
586
587			/**
588			* @param int $decimal
589			* @return string
590			*/
591	6		public static function dechex($decimal) {
592	6		$quotient = self::div($decimal, 16, 0);
593	6		$remainderToHex = \dechex(self::mod($decimal, 16));
594
595	6		if (self::comp($quotient, 0) === 0) {
596	6		return $remainderToHex;
597			}
598
599	6		return self::dechex($quotient) . $remainderToHex;
600			}
601			}
602

krowinski / bcmath-extended