Stack::isEmpty() - Code Metrics - Inspection of "ConsensusInterface: should accept $flags as a para..." - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#339)

by thomas

created 2016-07-05 02:01 UTC

Stack::isEmpty() A

↳ Parent: Stack

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	1
Bugs	0	Features	0

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

<?php

namespace BitWasp\Bitcoin\Script\Interpreter;

use BitWasp\Buffertools\BufferInterface;

class Stack implements \Countable, \ArrayAccess, \Iterator
{
    /**
     * @var int
     */
    private $position = 0;

    /**
     * @var array
     */
    private $values = [];

    public function current()
    {
        return $this->values[$this->position];
    }

    public function next()
    {
        ++$this->position;
    }

    public function key()
    {
        return $this->position;
    }

    public function valid()
    {
        return isset($this->values[$this->position]);
    }

    public function rewind()
    {
        $this->position = 0;
    }

    public function count()
    {
        return count($this->values);
    }

    public function isEmpty()
    {
        return count($this->values) === 0;
    }

    public function bottom()
    {
        $count = count($this);
        if ($count < 1) {
            throw new \RuntimeException('No values in stack');
        }

        return $this->values[$count - 1];
    }

    /**
     * @see \ArrayAccess::offsetGet()
     * @param int $offset
     * @return \BitWasp\Buffertools\BufferInterface
     */
    public function offsetGet($offset)
    {
        $index = count($this) + $offset;
        if (!isset($this->values[$index])) {
            throw new \RuntimeException('No value at this position');
        }

        return $this->values[$index];
    }

    /**
     * @see \ArrayAccess::offsetSet()
     * @param int $offset
     * @param BufferInterface $value
     * @throws \InvalidArgumentException
     */
    public function offsetSet($offset, $value)
    {
        if (!$value instanceof BufferInterface) {
            throw new \InvalidArgumentException;
        }

        $count = count($this);
        $index = $count + $offset;
        if (isset($this->values[$index])) {
            $this->values[$index] = $value;
            return;
        }

        if ($index !== $count) {
            throw new \RuntimeException('Index must be end position');
        }
    }

    /**
     * @see \ArrayAccess::offsetExists()
     * @param int $offset
     * @return bool
     */
    public function offsetExists($offset)
    {
        $index = count($this) + $offset;
        return isset($this->values[$index]);
    }

    /**
     * @see \ArrayAccess::offsetUnset()
     * @param int $offset
     */
    public function offsetUnset($offset)
    {
        $count = count($this);
        $index = $count + $offset;
        if (!isset($this->values[$index])) {
            throw new \RuntimeException('Nothing at this position');
        }

        array_splice($this->values, $index, 1);
    }

    /**
     * @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 $offset
     * @param BufferInterface $value
     */
    public function add($offset, $value)
    {
        $size = count($this);
        $index = $size + $offset;
        if ($index > $size) {
            throw new \RuntimeException('Invalid add position');
        }

        // Unwind current values, push provided value, reapply popped values
        $values = [];
        for ($i = $size; $i > $index; $i--) {
            $values[] = $this->pop();
        }

        $this->push($value);
        for ($i = count($values); $i > 0; $i--) {
            $this->push(array_pop($values));
        }
    }

    public function pop()
    {
        $count = count($this);
        if ($count === 0) {
            throw new \RuntimeException('Cannot pop from empty stack');
        }

        $value = array_pop($this->values);
        return $value;
    }

    public function push($buffer)
    {
        $this->values[] = $buffer;
    }

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

        return $count - 1;
    }

    /**
     * @param int $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 implements \Countable, \ArrayAccess, \Iterator
8		{
9		/**
10		* @var int
11		*/
12		private $position = 0;
13
14		/**
15		* @var array
16		*/
17		private $values = [];
18
19	2280	public function current()
20		{
21		return $this->values[$this->position];
22	2280	}
23
24	1329	public function next()
25		{
26	1329	++$this->position;
27		}
28
29	1329	public function key()
30		{
31	1329	return $this->position;
32	1329	}
33
34		public function valid()
35		{
36		return isset($this->values[$this->position]);
37		}
38
39	2241	public function rewind()
40		{
41	2241	$this->position = 0;
42		}
43
44	2241	public function count()
45		{
46	2241	return count($this->values);
47	2241	}
48
49	2219	public function isEmpty()
50		{
51	2219	return count($this->values) === 0;
52		}
53
54	1815	public function bottom()
55		{
56	1815	$count = count($this);
57		if ($count < 1) {
58		throw new \RuntimeException('No values in stack');
59	82	}
60
61	82	return $this->values[$count - 1];
62	82	}
63
64		/**
65		* @see \ArrayAccess::offsetGet()
66	82	* @param int $offset
67		* @return \BitWasp\Buffertools\BufferInterface
68		*/
69		public function offsetGet($offset)
70		{
71		$index = count($this) + $offset;
72		if (!isset($this->values[$index])) {
73		throw new \RuntimeException('No value at this position');
74	1723	}
75
76	1723	return $this->values[$index];
77	1723	}
78	2
79		/**
80		* @see \ArrayAccess::offsetSet()
81	1723	* @param int $offset
82		* @param BufferInterface $value
83		* @throws \InvalidArgumentException
84		*/
85		public function offsetSet($offset, $value)
86		{
87		if (!$value instanceof BufferInterface) {
88		throw new \InvalidArgumentException;
89		}
90	37
91		$count = count($this);
92	37	$index = $count + $offset;
93		if (isset($this->values[$index])) {
94		$this->values[$index] = $value;
95		return;
96	37	}
97	37
98	37	if ($index !== $count) {
99	37	throw new \RuntimeException('Index must be end position');
100	37	}
101		}
102
103		/**
104		* @see \ArrayAccess::offsetExists()
105		* @param int $offset
106		* @return bool
107		*/
108		public function offsetExists($offset)
109		{
110		$index = count($this) + $offset;
111		return isset($this->values[$index]);
112		}
113	3
114		/**
115	3	* @see \ArrayAccess::offsetUnset()
116	3	* @param int $offset
117		*/
118		public function offsetUnset($offset)
119		{
120		$count = count($this);
121		$index = $count + $offset;
122		if (!isset($this->values[$index])) {
123	48	throw new \RuntimeException('Nothing at this position');
124		}
125	48
126	48	array_splice($this->values, $index, 1);
127	48	}
128	3
129		/**
130		* @param int $first
131	45	* @param int $second
132	45	*/
133		public function swap($first, $second)
134		{
135		$val1 = $this->offsetGet($first);
136		$val2 = $this->offsetGet($second);
137		$this->offsetSet($second, $val1);
138	37	$this->offsetSet($first, $val2);
139		}
140	37
141	37	/**
142	37	* @param int $offset
143	37	* @param BufferInterface $value
144	37	*/
145		public function add($offset, $value)
146		{
147		$size = count($this);
148		$index = $size + $offset;
149		if ($index > $size) {
150	12	throw new \RuntimeException('Invalid add position');
151		}
152	12
153	12	// Unwind current values, push provided value, reapply popped values
154	12	$values = [];
155		for ($i = $size; $i > $index; $i--) {
156		$values[] = $this->pop();
157		}
158
159	12	$this->push($value);
160	12	for ($i = count($values); $i > 0; $i--) {
161	12	$this->push(array_pop($values));
162	7	}
163		}
164	12
165	12	public function pop()
166	12	{
167	7	$count = count($this);
168	12	if ($count === 0) {
169		throw new \RuntimeException('Cannot pop from empty stack');
170	1540	}
171
172	1540	$value = array_pop($this->values);
173	1540	return $value;
174	3	}
175
176		public function push($buffer)
177	1537	{
178	1537	$this->values[] = $buffer;
179		}
180
181	2114	/**
182		* @return int
183	2114	*/
184	2114	public function end()
185		{
186		$count = count($this);
187		if ($count === 0) {
188		return 0;
189		}
190
191		return $count - 1;
192		}
193
194		/**
195		* @param int $length
196		* @return $this
197		*/
198		public function resize($length)
199		{
200		if ($length > count($this)) {
201		throw new \RuntimeException('Invalid start or length');
202		}
203	23
204		while (count($this) > $length) {
205	23	$this->pop();
206		}
207
208		return $this;
209	23	}
210		}
211

Bit-Wasp / bitcoin-php

Pull Request — master (#339)

Stack::isEmpty() A

Complexity

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Duplication

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