Stack::bottom() - Code Metrics - Inspection of "Segwit hc" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#244)

by thomas

created 2016-02-03 14:38 UTC

Stack::bottom() A

↳ Parent: Stack

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

<?php

namespace BitWasp\Bitcoin\Script\Interpreter;

use BitWasp\Buffertools\BufferInterface;

class Stack extends \SplDoublyLinkedList implements StackInterface
{
    public function __construct()
    {
        $this->setIteratorMode(\SplDoublyLinkedList::IT_MODE_FIFO | \SplDoublyLinkedList::IT_MODE_KEEP);
    }

    public function bottom()
    {
        return parent::offsetGet(count($this) - 1);
class Daddy
{
    protected function getFirstName()
    {
        return "Eidur";
    }

    protected function getSurName()
    {
        return "Gudjohnsen";
    }
}

class Son
{
    public function getFirstName()
    {
        return parent::getSurname();
    }
}
    }

    /**
     * @param mixed $value
     * @throws \InvalidArgumentException
     */
    private function typeCheck($value)
    {
        if (!$value instanceof BufferInterface) {
            throw new \InvalidArgumentException('Value was not of type Buffer');
        }
    }

    /**
     * @see \ArrayAccess::offsetGet()
     * @param int $offset
     * @return \BitWasp\Buffertools\Buffer
     */
    public function offsetGet($offset)
    {
        $offset = count($this) + $offset;
        return parent::offsetGet($offset);
    }

    /**
     * @see \ArrayAccess::offsetSet()
     * @param int $offset
     * @param BufferInterface $value
     * @throws \InvalidArgumentException
     */
    public function offsetSet($offset, $value)
    {
        $this->typeCheck($value);
        $offset = count($this) + $offset;
        parent::offsetSet($offset, $value);
    }

    /**
     * @see \ArrayAccess::offsetExists()
     * @param int $offset
     * @return bool
     */
    public function offsetExists($offset)
    {
        $offset = count($this) + $offset;
        return parent::offsetExists($offset);
    }

    /**
     * @see \ArrayAccess::offsetUnset()
     * @param int $offset
     */
    public function offsetUnset($offset)
    {
        $offset = count($this) + $offset;
        parent::offsetUnset($offset);
    }

    /**
     * @param int $first
     * @param int $second
     */
    public function swap($first, $second)
    {
        $val1 = $this->offsetGet($first);
        $val2 = $this->offsetGet($second);
        $this->offsetSet($second, $val1);
        $this->offsetSet($first, $val2);
    }

    /**
     * @param int $index
     * @param BufferInterface $value
     */
    public function add($index, $value)
    {
        $this->typeCheck($value);

        if (getenv('HHVM_VERSION') || version_compare(phpversion(), '5.5.0', 'lt')) {
            if ($index == $this->count()) {
                $this->push($value);
            } else {
                $size = count($this);
                $temp = [];
                for ($i = $size; $i > $index; $i--) {
                    array_unshift($temp, $this->pop());
                }

                $this->push($value);
                foreach ($temp as $value) {
                    $this->push($value);
                }
            }

        } else {
            parent::add($index, $value);
abstract class User
{
    /** @return string */
    abstract public function getPassword();
}

class MyUser extends User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}
        }
    }

    /**
     * @return int
     */
    public function end()
    {
        $count = count($this);
        if ($count === 0) {
            return 0;
        }

        return $count - 1;
    }

    /**
     * @param $length
     * @return $this
     */
    public function resize($length)
    {
        if ($length > count($this)) {
            throw new \RuntimeException('Invalid start or length');
        }

        while (count($this) > $length) {
            $this->pop();
        }

        return $this;
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Script\Interpreter;
4
5		use BitWasp\Buffertools\BufferInterface;
6
7		class Stack extends \SplDoublyLinkedList implements StackInterface
8		{
9	816	public function __construct()
10		{
11	816	$this->setIteratorMode(\SplDoublyLinkedList::IT_MODE_FIFO \| \SplDoublyLinkedList::IT_MODE_KEEP);
12	816	}
13
14		public function bottom()
15		{
16		return parent::offsetGet(count($this) - 1);
		0 ignored issues – show Comprehensibility Bug introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report It seems like you call parent on a different method (`offsetGet()` instead of `bottom()`). Are you sure this is correct? If so, you might want to change this to `$this->offsetGet()`. This check looks for a call to a parent method whose name is different than the method from which it is called. Consider the following code: class Daddy { protected function getFirstName() { return "Eidur"; } protected function getSurName() { return "Gudjohnsen"; } } class Son { public function getFirstName() { return parent::getSurname(); } } The `getFirstName()` method in the `Son` calls the wrong method in the parent class. Loading history...
17		}
18	54
19		/**
20	54	* @param mixed $value
21		* @throws \InvalidArgumentException
22		*/
23	54	private function typeCheck($value)
24		{
25		if (!$value instanceof BufferInterface) {
26		throw new \InvalidArgumentException('Value was not of type Buffer');
27		}
28		}
29
30	486	/**
31		* @see \ArrayAccess::offsetGet()
32	486	* @param int $offset
33	486	* @return \BitWasp\Buffertools\Buffer
34		*/
35		public function offsetGet($offset)
36		{
37		$offset = count($this) + $offset;
38		return parent::offsetGet($offset);
39		}
40
41		/**
42	36	* @see \ArrayAccess::offsetSet()
43		* @param int $offset
44	36	* @param BufferInterface $value
45	36	* @throws \InvalidArgumentException
46	36	*/
47	36	public function offsetSet($offset, $value)
48		{
49		$this->typeCheck($value);
50		$offset = count($this) + $offset;
51		parent::offsetSet($offset, $value);
52		}
53
54	6	/**
55		* @see \ArrayAccess::offsetExists()
56	6	* @param int $offset
57	6	* @return bool
58		*/
59		public function offsetExists($offset)
60		{
61		$offset = count($this) + $offset;
62		return parent::offsetExists($offset);
63		}
64	36
65		/**
66	36	* @see \ArrayAccess::offsetUnset()
67	36	* @param int $offset
68	30	*/
69		public function offsetUnset($offset)
70		{
71		$offset = count($this) + $offset;
72		parent::offsetUnset($offset);
73		}
74	24
75		/**
76	24	* @param int $first
77	24	* @param int $second
78	24	*/
79	24	public function swap($first, $second)
80	24	{
81		$val1 = $this->offsetGet($first);
82		$val2 = $this->offsetGet($second);
83		$this->offsetSet($second, $val1);
84		$this->offsetSet($first, $val2);
85		}
86	18
87		/**
88	18	* @param int $index
89		* @param BufferInterface $value
90	18	*/
91	9	public function add($index, $value)
92	3	{
93	3	$this->typeCheck($value);
94	6
95	6	if (getenv('HHVM_VERSION') \|\| version_compare(phpversion(), '5.5.0', 'lt')) {
96	6	if ($index == $this->count()) {
97	6	$this->push($value);
98	6	} else {
99		$size = count($this);
100	3	$temp = [];
101	3	for ($i = $size; $i > $index; $i--) {
102	3	array_unshift($temp, $this->pop());
103	3	}
104
105		$this->push($value);
106	6	foreach ($temp as $value) {
107	9	$this->push($value);
108		}
109	12	}
110
111		} else {
112		parent::add($index, $value);
		0 ignored issues – show Bug introduced 2015-11-22 19:28 UTC by Report Bug Copy Issue Report It seems like you code against a specific sub-type and not the parent class `SplDoublyLinkedList` as the method `add()` does only exist in the following sub-classes of `SplDoublyLinkedList`: `BitWasp\Bitcoin\Script\Interpreter\Stack`. Maybe you want to `instanceof` check for one of these explicitly? Let’s take a look at an example: abstract class User { /** @return string / abstract public function getPassword(); } class MyUser extends User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different sub-classes of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the parent class: abstract class User { /** @return string / abstract public function getPassword(); /* @return string */ abstract public function getDisplayName(); } Loading history...
113		}
114	684	}
115
116	684	/**
117	684	* @return int
118	684	*/
119		public function end()
120		{
121	12	$count = count($this);
122		if ($count === 0) {
123		return 0;
124		}
125
126		return $count - 1;
127		}
128
129		/**
130		* @param $length
131		* @return $this
132		*/
133		public function resize($length)
134		{
135		if ($length > count($this)) {
136		throw new \RuntimeException('Invalid start or length');
137		}
138
139		while (count($this) > $length) {
140		$this->pop();
141		}
142
143		return $this;
144		}
145		}
146

Bit-Wasp / bitcoin-php

Pull Request — master (#244)

Stack::bottom() A

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