Number::getBuffer() - Code Metrics - Inspection of "WIP: script tests" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#334)

by thomas

created 2016-07-01 14:17 UTC

Number::getBuffer() A

↳ Parent: Number

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

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

<?php

namespace BitWasp\Bitcoin\Script\Interpreter;

use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Math\Math;
use BitWasp\Bitcoin\Serializable;
use BitWasp\Buffertools\Buffer;
use BitWasp\Buffertools\BufferInterface;

class Number extends Serializable
{
    const MAX_NUM_SIZE = 4;
    const MAX = 2**31-1;
    const MIN = -2**31+1;

    /**
     * @var Math
     */
    private $math;

    /**
     * @var int
     */
    private $number;

    /**
     * Number constructor.
     * @param int $number
     * @param Math $math
     */
    public function __construct($number, Math $math)
    {
        $this->number = $number;
        $this->math = $math;
    }

    /**
     * @param int $number
     * @param Math|null $math
     * @return self
     */
    public static function int($number, Math $math = null)
    {
        return new self(
            $number,
            $math ?: Bitcoin::getMath()
        );
    }

    /**
     * @param \GMP $number
     * @param Math|null $math
     * @return self
     */
    public static function gmp(\GMP $number, Math $math = null)
    {
        return new self(
            gmp_strval($number, 10),
            $math ?: Bitcoin::getMath()
        );
    }

    /**
     * @param BufferInterface $vch
     * @param bool $fRequireMinimal
     * @param int $maxNumSize
     * @param Math|null $math
     * @return self
     */
    public static function buffer(BufferInterface $vch, $fRequireMinimal, $maxNumSize = self::MAX_NUM_SIZE, Math $math = null)
    {
        $size = $vch->getSize();
        if ($size > $maxNumSize) {
            throw new \RuntimeException('Script number overflow');
        }

        if ($fRequireMinimal && $size > 0) {
            $binary = $vch->getBinary();
            if ((ord($binary[$size - 1]) & 0x7f) == 0) {
                if ($size <= 1 || (ord($binary[$size - 2]) & 0x80) == 0) {
                    throw new \RuntimeException('Non-minimally encoded script number');
                }
            }
        }

        $math = $math ?: Bitcoin::getMath();
        $number = new self(0, $math);
        $number->number = $number->parseBuffer($vch);
$answer = 42;

$correct = false;

$correct = (bool) $answer;
        return $number;
    }

    /**
     * @param BufferInterface $buffer
     * @return int
     */
    private function parseBuffer(BufferInterface $buffer)
    {
        $size = $buffer->getSize();
        if ($size === 0) {
            return '0';
        }

        $chars = $buffer->getBinary();

        $result = gmp_init(0);
        for ($i = 0; $i < $size; $i++) {
            $mul = $i * 8;
            $byte = $this->math->leftShift(gmp_init(ord($chars[$i]), 10), $mul);
            $result = $this->math->bitwiseOr($result, $byte);
        }

        if ($chars[count($chars)-1] & 0x80) {
            $mask = gmp_com($this->math->leftShift(gmp_init(0x80), (8 * ($size - 1))));
            $result = $this->math->sub(gmp_init(0), $this->math->bitwiseAnd($result, $mask));
        }

        return gmp_strval($result, 10);
    }

    /**
     * @return BufferInterface
     */
    private function serialize()
    {
        if ($this->number == 0) {
            return new Buffer('', 0);
        }

        $zero = gmp_init(0);
        // Using array of integers instead of bytes
        $result = [];
        $negative = $this->math->cmp(gmp_init($this->number), $zero) < 0;
        $abs = $negative ? $this->math->sub($zero, gmp_init($this->number, 10)) : gmp_init($this->number, 10);
        $mask = gmp_init(0xff);
        while ($this->math->cmp($abs, $zero) > 0) {
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
            $result[] = (int) gmp_strval($this->math->bitwiseAnd($abs, $mask), 10);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
            $abs = $this->math->rightShift($abs, 8);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
        }

        if ($result[count($result) - 1] & 0x80) {
            $result[] = $negative ? 0x80 : 0;
        } else if ($negative) {
            $result[count($result) - 1] |= 0x80;
        }

        $s = '';
        foreach ($result as $i) {
            $s .= chr($i);
        }

        return new Buffer($s, null, $this->math);

    }

    /**
     * @return BufferInterface
     */
    public function getBuffer()
    {
        return $this->serialize();
    }

    /**
     * @return int
     */
    public function getInt()
    {
        if ($this->math->cmp(gmp_init($this->number, 10), gmp_init(self::MAX)) > 0) {
            return self::MAX;
        } else if ($this->math->cmp(gmp_init($this->number, 10), gmp_init(self::MIN)) < 0) {
            return self::MIN;
        }

        return $this->number;
    }

    /**
     * @return \GMP
     */
    public function getGmp()
    {
        return gmp_init($this->number, 10);
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Script\Interpreter;
4
5		use BitWasp\Bitcoin\Bitcoin;
6		use BitWasp\Bitcoin\Math\Math;
7		use BitWasp\Bitcoin\Serializable;
8		use BitWasp\Buffertools\Buffer;
9		use BitWasp\Buffertools\BufferInterface;
10
11		class Number extends Serializable
12		{
13		const MAX_NUM_SIZE = 4;
14		const MAX = 2**31-1;
15		const MIN = -2**31+1;
16
17		/**
18		* @var Math
19		*/
20		private $math;
21
22		/**
23		* @var int
24		*/
25		private $number;
26
27		/**
28		* Number constructor.
29		* @param int $number
30		* @param Math $math
31		*/
32	2592	public function __construct($number, Math $math)
33		{
34	2592	$this->number = $number;
35	2592	$this->math = $math;
36	2592	}
37
38		/**
39		* @param int $number
40		* @param Math\|null $math
41		* @return self
42		*/
43	2451	public static function int($number, Math $math = null)
44		{
45	2451	return new self(
46	817	$number,
47	2451	$math ?: Bitcoin::getMath()
48	817	);
49		}
50
51		/**
52		* @param \GMP $number
53		* @param Math\|null $math
54		* @return self
55		*/
56		public static function gmp(\GMP $number, Math $math = null)
57		{
58		return new self(
59		gmp_strval($number, 10),
60		$math ?: Bitcoin::getMath()
61		);
62		}
63
64		/**
65		* @param BufferInterface $vch
66		* @param bool $fRequireMinimal
67		* @param int $maxNumSize
68		* @param Math\|null $math
69		* @return self
70		*/
71	1251	public static function buffer(BufferInterface $vch, $fRequireMinimal, $maxNumSize = self::MAX_NUM_SIZE, Math $math = null)
72		{
73	1251	$size = $vch->getSize();
74	1251	if ($size > $maxNumSize) {
75	36	throw new \RuntimeException('Script number overflow');
76		}
77
78	1224	if ($fRequireMinimal && $size > 0) {
79	165	$binary = $vch->getBinary();
80	165	if ((ord($binary[$size - 1]) & 0x7f) == 0) {
81	165	if ($size <= 1 \|\| (ord($binary[$size - 2]) & 0x80) == 0) {
82	165	throw new \RuntimeException('Non-minimally encoded script number');
83		}
84		}
85	1	}
86
87	1113	$math = $math ?: Bitcoin::getMath();
88	1113	$number = new self(0, $math);
89	1113	$number->number = $number->parseBuffer($vch);
		0 ignored issues – show Documentation Bug introduced 2016-06-17 14:28 UTC by Report Bug Copy Issue Report The property `$number` was declared of type `integer`, but `$number->parseBuffer($vch)` is of type `string`. Maybe add a type cast? This check looks for assignments to scalar types that may be of the wrong type. To ensure the code behaves as expected, it may be a good idea to add an explicit type cast. $answer = 42; $correct = false; $correct = (bool) $answer; Loading history...
90	1113	return $number;
91		}
92
93		/**
94		* @param BufferInterface $buffer
95		* @return int
96		*/
97	1113	private function parseBuffer(BufferInterface $buffer)
98		{
99	1113	$size = $buffer->getSize();
100	1113	if ($size === 0) {
101	597	return '0';
102		}
103
104	921	$chars = $buffer->getBinary();
105
106	921	$result = gmp_init(0);
107	921	for ($i = 0; $i < $size; $i++) {
108	921	$mul = $i * 8;
109	921	$byte = $this->math->leftShift(gmp_init(ord($chars[$i]), 10), $mul);
110	921	$result = $this->math->bitwiseOr($result, $byte);
111	307	}
112
113	921	if ($chars[count($chars)-1] & 0x80) {
114		$mask = gmp_com($this->math->leftShift(gmp_init(0x80), (8 * ($size - 1))));
115		$result = $this->math->sub(gmp_init(0), $this->math->bitwiseAnd($result, $mask));
116		}
117
118	921	return gmp_strval($result, 10);
119		}
120
121		/**
122		* @return BufferInterface
123		*/
124	2451	private function serialize()
125		{
126	2451	if ($this->number == 0) {
127	438	return new Buffer('', 0);
128		}
129
130	2280	$zero = gmp_init(0);
131		// Using array of integers instead of bytes
132	2280	$result = [];
133	2280	$negative = $this->math->cmp(gmp_init($this->number), $zero) < 0;
134	2280	$abs = $negative ? $this->math->sub($zero, gmp_init($this->number, 10)) : gmp_init($this->number, 10);
135	2280	$mask = gmp_init(0xff);
136	2280	while ($this->math->cmp($abs, $zero) > 0) {
		0 ignored issues – show Bug introduced 2016-06-17 14:28 UTC by Report Bug Copy Issue Report It seems like `$abs` defined by `$negative ? $this->math-...init($this->number, 10)` on line `134` can also be of type `resource`; however, `Mdanter\Ecc\Math\GmpMath::cmp()` does only seem to accept `object<GMP>`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
137	2280	$result[] = (int) gmp_strval($this->math->bitwiseAnd($abs, $mask), 10);
		0 ignored issues – show Bug introduced 2016-06-17 14:28 UTC by Report Bug Copy Issue Report It seems like `$abs` defined by `$negative ? $this->math-...init($this->number, 10)` on line `134` can also be of type `resource`; however, `Mdanter\Ecc\Math\GmpMath::bitwiseAnd()` does only seem to accept `object<GMP>`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
138	2280	$abs = $this->math->rightShift($abs, 8);
		0 ignored issues – show Bug introduced 2016-06-17 14:28 UTC by Report Bug Copy Issue Report It seems like `$abs` can also be of type `resource`; however, `Mdanter\Ecc\Math\GmpMath::rightShift()` does only seem to accept `object<GMP>`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
139	760	}
140
141	2280	if ($result[count($result) - 1] & 0x80) {
142	39	$result[] = $negative ? 0x80 : 0;
143	2258	} else if ($negative) {
144	24	$result[count($result) - 1] \|= 0x80;
145	8	}
146
147	2280	$s = '';
148	2280	foreach ($result as $i) {
149	2280	$s .= chr($i);
150	760	}
151
152	2280	return new Buffer($s, null, $this->math);
153
154		}
155
156		/**
157		* @return BufferInterface
158		*/
159	2451	public function getBuffer()
160		{
161	2451	return $this->serialize();
162		}
163
164		/**
165		* @return int
166		*/
167	351	public function getInt()
168		{
169	351	if ($this->math->cmp(gmp_init($this->number, 10), gmp_init(self::MAX)) > 0) {
170	3	return self::MAX;
171	348	} else if ($this->math->cmp(gmp_init($this->number, 10), gmp_init(self::MIN)) < 0) {
172		return self::MIN;
173		}
174
175	348	return $this->number;
176		}
177
178		/**
179		* @return \GMP
180		*/
181	786	public function getGmp()
182		{
183	786	return gmp_init($this->number, 10);
184		}
185		}
186

Bit-Wasp / bitcoin-php

Pull Request — master (#334)

Number::getBuffer() A

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