Stack::valid() - Code Metrics - Inspection of "Merge pull request #336 from afk11/script-verifica..." - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 9369e3...7c941d )

by thomas

created 2016-07-02 02:18 UTC

Stack::valid() 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 __construct()
    {

    }

    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 __construct()
20		{
21
22	2280	}
23
24	1329	public function current()
25		{
26	1329	return $this->values[$this->position];
27		}
28
29	1329	public function next()
30		{
31	1329	++$this->position;
32	1329	}
33
34		public function key()
35		{
36		return $this->position;
37		}
38
39	2241	public function valid()
40		{
41	2241	return isset($this->values[$this->position]);
42		}
43
44	2241	public function rewind()
45		{
46	2241	$this->position = 0;
47	2241	}
48
49	2219	public function count()
50		{
51	2219	return count($this->values);
52		}
53
54	1815	public function isEmpty()
55		{
56	1815	return count($this->values) === 0;
57		}
58
59	82	public function bottom()
60		{
61	82	$count = count($this);
62	82	if ($count < 1) {
63		throw new \RuntimeException('No values in stack');
64		}
65
66	82	return $this->values[$count - 1];
67		}
68
69		/**
70		* @see \ArrayAccess::offsetGet()
71		* @param int $offset
72		* @return \BitWasp\Buffertools\BufferInterface
73		*/
74	1723	public function offsetGet($offset)
75		{
76	1723	$index = count($this) + $offset;
77	1723	if (!isset($this->values[$index])) {
78	2	throw new \RuntimeException('No value at this position');
79		}
80
81	1723	return $this->values[$index];
82		}
83
84		/**
85		* @see \ArrayAccess::offsetSet()
86		* @param int $offset
87		* @param BufferInterface $value
88		* @throws \InvalidArgumentException
89		*/
90	37	public function offsetSet($offset, $value)
91		{
92	37	if (!$value instanceof BufferInterface) {
93		throw new \InvalidArgumentException;
94		}
95
96	37	$count = count($this);
97	37	$index = $count + $offset;
98	37	if (isset($this->values[$index])) {
99	37	$this->values[$index] = $value;
100	37	return;
101		}
102
103		if ($index !== $count) {
104		throw new \RuntimeException('Index must be end position');
105		}
106		}
107
108		/**
109		* @see \ArrayAccess::offsetExists()
110		* @param int $offset
111		* @return bool
112		*/
113	3	public function offsetExists($offset)
114		{
115	3	$index = count($this) + $offset;
116	3	return isset($this->values[$index]);
117		}
118
119		/**
120		* @see \ArrayAccess::offsetUnset()
121		* @param int $offset
122		*/
123	48	public function offsetUnset($offset)
124		{
125	48	$count = count($this);
126	48	$index = $count + $offset;
127	48	if (!isset($this->values[$index])) {
128	3	throw new \RuntimeException('Nothing at this position');
129		}
130
131	45	array_splice($this->values, $index, 1);
132	45	}
133
134		/**
135		* @param int $first
136		* @param int $second
137		*/
138	37	public function swap($first, $second)
139		{
140	37	$val1 = $this->offsetGet($first);
141	37	$val2 = $this->offsetGet($second);
142	37	$this->offsetSet($second, $val1);
143	37	$this->offsetSet($first, $val2);
144	37	}
145
146		/**
147		* @param int $offset
148		* @param BufferInterface $value
149		*/
150	12	public function add($offset, $value)
151		{
152	12	$size = count($this);
153	12	$index = $size + $offset;
154	12	if ($index > $size) {
155		throw new \RuntimeException('Invalid add position');
156		}
157
158		// Unwind current values, push provided value, reapply popped values
159	12	$values = [];
160	12	for ($i = $size; $i > $index; $i--) {
161	12	$values[] = $this->pop();
162	7	}
163
164	12	$this->push($value);
165	12	for ($i = count($values); $i > 0; $i--) {
166	12	$this->push(array_pop($values));
167	7	}
168	12	}
169
170	1540	public function pop()
171		{
172	1540	$count = count($this);
173	1540	if ($count === 0) {
174	3	throw new \RuntimeException('Cannot pop from empty stack');
175		}
176
177	1537	$value = array_pop($this->values);
178	1537	return $value;
179		}
180
181	2114	public function push($buffer)
182		{
183	2114	$this->values[] = $buffer;
184	2114	}
185
186		/**
187		* @return int
188		*/
189		public function end()
190		{
191		$count = count($this);
192		if ($count === 0) {
193		return 0;
194		}
195
196		return $count - 1;
197		}
198
199		/**
200		* @param int $length
201		* @return $this
202		*/
203	23	public function resize($length)
204		{
205	23	if ($length > count($this)) {
206		throw new \RuntimeException('Invalid start or length');
207		}
208
209	23	while (count($this) > $length) {
210	23	$this->pop();
211	14	}
212
213	23	return $this;
214		}
215		}
216

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