Json5Decoder::decode() - Code Metrics - Inspection of "Prepare for the v1.0.5 release" - colinodell/json5 - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 1cbf3e...8c73e1 )

by Colin

created 2018-09-20 15:43 UTC

Json5Decoder::decode() B

↳ Parent: Json5Decoder

Complexity

Conditions	6
Paths	13

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	10
CRAP Score	7.3329

Importance

Changes

Metric	Value
cc	6
nc	13
nop	4
dl	0
loc	25
ccs	10
cts	15
cp	0.6667
crap	7.3329
rs	8.8977
c	0
b	0
f	0

<?php

/*
 * This file is part of the colinodell/json5 package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * Based on the official JSON5 implementation for JavaScript (https://github.com/json5/json5)
 *  - (c) 2012-2016 Aseem Kishore and others (https://github.com/json5/json5/contributors)
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ColinODell\Json5;

final class Json5Decoder
{
    private $json;

    private $length;

    private $at = 0;

    private $currentByte;

    private $lineNumber = 1;

    private $associative = false;

    private $maxDepth = 512;

    private $castBigIntToString = false;

    private $depth = 1;

    private $currentLineStartsAt = 0;

    /**
     * Private constructor.
     *
     * @param string $json
     * @param bool   $associative
     * @param int    $depth
     * @param bool   $castBigIntToString
     */
    private function __construct($json, $associative = false, $depth = 512, $castBigIntToString = false)
    {
        $this->json = $json;
        $this->associative = $associative;
        $this->maxDepth = $depth;
        $this->castBigIntToString = $castBigIntToString;

        $this->length = strlen($json);
        $this->currentByte = $this->getByte(0);
    }

    /**
     * Takes a JSON encoded string and converts it into a PHP variable.
     *
     * The parameters exactly match PHP's json_decode() function - see
     * http://php.net/manual/en/function.json-decode.php for more information.
     *
     * @param string $source      The JSON string being decoded.
     * @param bool   $associative When TRUE, returned objects will be converted into associative arrays.
     * @param int    $depth       User specified recursion depth.
     * @param int    $options     Bitmask of JSON decode options.
     *
     * @return mixed
     */
    public static function decode($source, $associative = false, $depth = 512, $options = 0)
    {
        // Try parsing with json_decode first, since that's much faster
        // We only attempt this on PHP 7+ because 5.x doesn't parse some edge cases correctly
        if (PHP_VERSION_ID >= 70000) {
            $result = json_decode($source, $associative, $depth, $options);
            if (json_last_error() === JSON_ERROR_NONE) {
                return $result;
            }
        }

        // Fall back to JSON5 if that fails
        $associative = $associative === true || ($associative === null && $options & JSON_OBJECT_AS_ARRAY);
        $castBigIntToString = $options & JSON_BIGINT_AS_STRING;

        $decoder = new self((string)$source, $associative, $depth, $castBigIntToString);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

        $result = $decoder->value();
        $decoder->white();
        if ($decoder->currentByte) {
            $decoder->throwSyntaxError('Syntax error');
        }

        return $result;
    }

    /**
     * @param int $at
     *
     * @return null
     */
    private function getByte($at)
    {
        if ($at >= $this->length) {
            return null;
        }

        return $this->json[$at];
    }

    /**
     * @return string|null
     */
    private function currentChar()
    {
        if ($this->at >= $this->length) {
            return null;
        }

        return mb_substr(substr($this->json, $this->at, 4), 0, 1);
    }

    /**
     * Parse the next character.
     *
     * @return null|string
     */
    private function next()
    {
        // Get the next character. When there are no more characters,
        // return the empty string.
        if ($this->currentByte === "\n" || ($this->currentByte === "\r" && $this->peek() !== "\n")) {
            $this->lineNumber++;
            $this->currentLineStartsAt = $this->at + 1;
        }

        $this->at++;
        
        return $this->currentByte = $this->getByte($this->at);
    }

    /**
     * Parse the next character if it matches $c or fail.
     *
     * @param string $c
     *
     * @return string|null
     */
    private function nextOrFail($c)
    {
        if ($c !== $this->currentByte) {
            $this->throwSyntaxError(sprintf(
                'Expected %s instead of %s',
                self::renderChar($c),
                self::renderChar($this->currentChar())
            ));
        }

        return $this->next();
    }

    /**
     * Get the next character without consuming it or
     * assigning it to the ch variable.
     *
     * @return mixed
     */
    private function peek()
    {
        return $this->getByte($this->at + 1);
    }

    /**
     * Attempt to match a regular expression at the current position on the current line.
     *
     * This function will not match across multiple lines.
     *
     * @param string $regex
     *
     * @return string|null
     */
    private function match($regex)
    {
        $subject = substr($this->json, $this->at);
        // Only match on the current line
        if ($pos = strpos($subject, "\n")) {
            $subject = substr($subject, 0, $pos);
        }

        if (!preg_match($regex, $subject, $matches, PREG_OFFSET_CAPTURE)) {
            return null;
        }

        $this->at += $matches[0][1] + strlen($matches[0][0]);
        $this->currentByte = $this->getByte($this->at);

        return $matches[0][0];
    }

    /**
     * Parse an identifier.
     *
     * Normally, reserved words are disallowed here, but we
     * only use this for unquoted object keys, where reserved words are allowed,
     * so we don't check for those here. References:
     * - http://es5.github.com/#x7.6
     * - https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Core_Language_Features#Variables
     * - http://docstore.mik.ua/orelly/webprog/jscript/ch02_07.htm
     */
    private function identifier()
    {
        // @codingStandardsIgnoreStart
        // Be careful when editing this regex, there are a couple Unicode characters in between here -------------vv
        $match = $this->match('/^(?:[\$_\p{L}\p{Nl}]|\\\\u[0-9A-Fa-f]{4})(?:[\$_\p{L}\p{Nl}\p{Mn}\p{Mc}\p{Nd}\p{Pc}‌‍]|\\\\u[0-9A-Fa-f]{4})*/u');
        // @codingStandardsIgnoreEnd

        if ($match === null) {
            $this->throwSyntaxError('Bad identifier as unquoted key');
        }

        // Un-escape escaped Unicode chars
        $unescaped = preg_replace_callback('/(?:\\\\u[0-9A-Fa-f]{4})+/', function ($m) {
            return json_decode('"'.$m[0].'"');
        }, $match);

        return $unescaped;
    }

    private function number()
    {
        $number = null;
        $sign = '';
        $string = '';
        $base = 10;

        if ($this->currentByte === '-' || $this->currentByte === '+') {
            $sign = $this->currentByte;
            $this->next();
        }

        // support for Infinity
        if ($this->currentByte === 'I') {
            $this->word();

            return ($sign === '-') ? -INF : INF;
        }

        // support for NaN
        if ($this->currentByte === 'N') {
            $number = $this->word();

            // ignore sign as -NaN also is NaN
            return $number;
        }

        if ($this->currentByte === '0') {
            $string .= $this->currentByte;
            $this->next();
            if ($this->currentByte === 'x' || $this->currentByte === 'X') {
                $string .= $this->currentByte;
                $this->next();
                $base = 16;
            } elseif (is_numeric($this->currentByte)) {
                $this->throwSyntaxError('Octal literal');
            }
        }

        switch ($base) {
            case 10:
                // @codingStandardsIgnoreStart
                if ((is_numeric($this->currentByte) || $this->currentByte === '.') && ($match = $this->match('/^\d*\.?\d*/')) !== null) {

                    $string .= $match;
                }
                if (($this->currentByte === 'E' || $this->currentByte === 'e') && ($match = $this->match('/^[Ee][-+]?\d*/')) !== null) {

                    $string .= $match;
                }
                // @codingStandardsIgnoreEnd
                $number = $string;
                break;
            case 16:
                if (($match = $this->match('/^[A-Fa-f0-9]+/')) !== null) {
                    $string .= $match;
                    $number = hexdec($string);
                    break;
                }
                $this->throwSyntaxError('Bad hex number');
        }

        if ($sign === '-') {
            $number = -$number;
        }

        if (!is_numeric($number) || !is_finite($number)) {
            $this->throwSyntaxError('Bad number');
        }

        if ($this->castBigIntToString) {
            return $number;
        }

        // Adding 0 will automatically cast this to an int or float
        return $number + 0;
    }

    private function string()
    {
        $string = '';

        $delim = $this->currentByte;
        $this->next();
        while ($this->currentByte !== null) {
            if ($this->currentByte === $delim) {
                $this->next();

                return $string;
            }

            if ($this->currentByte === '\\') {
                if ($this->peek() === 'u' && $unicodeEscaped = $this->match('/^(?:\\\\u[A-Fa-f0-9]{4})+/')) {
                    $string .= json_decode('"'.$unicodeEscaped.'"');
                    continue;
                }

                $this->next();
                if ($this->currentByte === "\r") {
                    if ($this->peek() === "\n") {
                        $this->next();
                    }
                } elseif (($escapee = self::getEscapee($this->currentByte)) !== null) {
                    $string .= $escapee;
                } else {
                    break;
                }
            } elseif ($this->currentByte === "\n") {
                // unescaped newlines are invalid; see:
                // https://github.com/json5/json5/issues/24
                // @todo this feels special-cased; are there other invalid unescaped chars?
                break;
            } else {
                $string .= $this->currentByte;
            }

            $this->next();
        }

        $this->throwSyntaxError('Bad string');
    }

    /**
     * Skip an inline comment, assuming this is one.
     *
     * The current character should be the second / character in the // pair that begins this inline comment.
     * To finish the inline comment, we look for a newline or the end of the text.
     */
    private function inlineComment()
    {
        do {
            $this->next();
            if ($this->currentByte === "\n" || $this->currentByte === "\r") {
                $this->next();

                return;
            }
        } while ($this->currentByte !== null);
    }

    /**
     * Skip a block comment, assuming this is one.
     *
     * The current character should be the * character in the /* pair that begins this block comment.
     * To finish the block comment, we look for an ending *​/ pair of characters,
     * but we also watch for the end of text before the comment is terminated.
     */
    private function blockComment()
    {
        do {
            $this->next();
            while ($this->currentByte === '*') {
                $this->nextOrFail('*');
                if ($this->currentByte === '/') {
                    $this->nextOrFail('/');

                    return;
                }
            }
        } while ($this->currentByte !== null);

        $this->throwSyntaxError('Unterminated block comment');
    }

    /**
     * Skip a comment, whether inline or block-level, assuming this is one.
     */
    private function comment()
    {
        // Comments always begin with a / character.
        $this->nextOrFail('/');

        if ($this->currentByte === '/') {
            $this->inlineComment();
        } elseif ($this->currentByte === '*') {
            $this->blockComment();
        } else {
            $this->throwSyntaxError('Unrecognized comment');
        }
    }

    /**
     * Skip whitespace and comments.
     *
     * Note that we're detecting comments by only a single / character.
     * This works since regular expressions are not valid JSON(5), but this will
     * break if there are other valid values that begin with a / character!
     */
    private function white()
    {
        while ($this->currentByte !== null) {
            if ($this->currentByte === '/') {
                $this->comment();
            } elseif (preg_match('/^[ \t\r\n\v\f\xA0]/', $this->currentByte) === 1) {
                $this->next();
            } elseif (ord($this->currentByte) === 0xC2 && ord($this->peek()) === 0xA0) {
                // Non-breaking space in UTF-8
                $this->next();
                $this->next();
            } else {
                return;
            }
        }
    }

    /**
     * Matches true, false, null, etc
     */
    private function word()
    {
        switch ($this->currentByte) {
            case 't':
                $this->nextOrFail('t');
                $this->nextOrFail('r');
                $this->nextOrFail('u');
                $this->nextOrFail('e');
                return true;
            case 'f':
                $this->nextOrFail('f');
                $this->nextOrFail('a');
                $this->nextOrFail('l');
                $this->nextOrFail('s');
                $this->nextOrFail('e');
                return false;
            case 'n':
                $this->nextOrFail('n');
                $this->nextOrFail('u');
                $this->nextOrFail('l');
                $this->nextOrFail('l');
                return null;
            case 'I':
                $this->nextOrFail('I');
                $this->nextOrFail('n');
                $this->nextOrFail('f');
                $this->nextOrFail('i');
                $this->nextOrFail('n');
                $this->nextOrFail('i');
                $this->nextOrFail('t');
                $this->nextOrFail('y');
                return INF;
            case 'N':
                $this->nextOrFail('N');
                $this->nextOrFail('a');
                $this->nextOrFail('N');
                return NAN;
        }

        $this->throwSyntaxError('Unexpected ' . self::renderChar($this->currentChar()));
    }

    private function arr()
    {
        $arr = [];

        if (++$this->depth > $this->maxDepth) {
            $this->throwSyntaxError('Maximum stack depth exceeded');
        }

        $this->nextOrFail('[');
        $this->white();
        while ($this->currentByte !== null) {
            if ($this->currentByte === ']') {
                $this->nextOrFail(']');
                $this->depth--;
                return $arr; // Potentially empty array
            }
            // ES5 allows omitting elements in arrays, e.g. [,] and
            // [,null]. We don't allow this in JSON5.
            if ($this->currentByte === ',') {
                $this->throwSyntaxError('Missing array element');
            }

            $arr[] = $this->value();

            $this->white();
            // If there's no comma after this value, this needs to
            // be the end of the array.
            if ($this->currentByte !== ',') {
                $this->nextOrFail(']');
                $this->depth--;
                return $arr;
            }
            $this->nextOrFail(',');
            $this->white();
        }

        $this->throwSyntaxError('Invalid array');
    }

    /**
     * Parse an object value
     */
    private function obj()
    {
        $object = $this->associative ? [] : new \stdClass;

        if (++$this->depth > $this->maxDepth) {
            $this->throwSyntaxError('Maximum stack depth exceeded');
        }

        $this->nextOrFail('{');
        $this->white();
        while ($this->currentByte !== null) {
            if ($this->currentByte === '}') {
                $this->nextOrFail('}');
                $this->depth--;
                return $object; // Potentially empty object
            }

            // Keys can be unquoted. If they are, they need to be
            // valid JS identifiers.
            if ($this->currentByte === '"' || $this->currentByte === "'") {
                $key = $this->string();
            } else {
                $key = $this->identifier();
            }

            $this->white();
            $this->nextOrFail(':');
            if ($this->associative) {
                $object[$key] = $this->value();
            } else {
                $object->{$key} = $this->value();
            }
            $this->white();
            // If there's no comma after this pair, this needs to be
            // the end of the object.
            if ($this->currentByte !== ',') {
                $this->nextOrFail('}');
                $this->depth--;
                return $object;
            }
            $this->nextOrFail(',');
            $this->white();
        }

        $this->throwSyntaxError('Invalid object');
    }

    /**
     * Parse a JSON value.
     *
     * It could be an object, an array, a string, a number,
     * or a word.
     */
    private function value()
    {
        $this->white();
        switch ($this->currentByte) {
            case '{':
                return $this->obj();
            case '[':
                return $this->arr();
            case '"':
            case "'":
                return $this->string();
            case '-':
            case '+':
            case '.':
                return $this->number();
            default:
                return is_numeric($this->currentByte) ? $this->number() : $this->word();
        }
    }

    private function throwSyntaxError($message)
    {
        // Calculate the column number
        $str = substr($this->json, $this->currentLineStartsAt, $this->at - $this->currentLineStartsAt);
        $column = mb_strlen($str) + 1;

        throw new SyntaxError($message, $this->lineNumber, $column);
    }

    private static function renderChar($chr)
    {
        return $chr === null ? 'EOF' : "'" . $chr . "'";
    }

    /**
     * @param string $ch
     *
     * @return string|null
     */
    private static function getEscapee($ch)
    {
        switch ($ch) {
            // @codingStandardsIgnoreStart
            case "'":  return "'";
            case '"':  return '"';
            case '\\': return '\\';
            case '/':  return '/';
            case "\n": return '';
            case 'b':  return chr(8);
            case 'f':  return "\f";
            case 'n':  return "\n";
            case 'r':  return "\r";
            case 't':  return "\t";
            default:   return null;
            // @codingStandardsIgnoreEnd
        }
    }
}


1			<?php
2
3			/*
4			* This file is part of the colinodell/json5 package.
5			*
6			* (c) Colin O'Dell <[email protected]>
7			*
8			* Based on the official JSON5 implementation for JavaScript (https://github.com/json5/json5)
9			* - (c) 2012-2016 Aseem Kishore and others (https://github.com/json5/json5/contributors)
10			*
11			* For the full copyright and license information, please view the LICENSE
12			* file that was distributed with this source code.
13			*/
14
15			namespace ColinODell\Json5;
16
17			final class Json5Decoder
18			{
19			private $json;
20
21			private $length;
22
23			private $at = 0;
24
25			private $currentByte;
26
27			private $lineNumber = 1;
28
29			private $associative = false;
30
31			private $maxDepth = 512;
32
33			private $castBigIntToString = false;
34
35			private $depth = 1;
36
37			private $currentLineStartsAt = 0;
38
39			/**
40			* Private constructor.
41			*
42			* @param string $json
43			* @param bool $associative
44			* @param int $depth
45			* @param bool $castBigIntToString
46			*/
47	420		private function __construct($json, $associative = false, $depth = 512, $castBigIntToString = false)
48			{
49	420		$this->json = $json;
50	420		$this->associative = $associative;
51	420		$this->maxDepth = $depth;
52	420		$this->castBigIntToString = $castBigIntToString;
53
54	420		$this->length = strlen($json);
55	420		$this->currentByte = $this->getByte(0);
56	420		}
57
58			/**
59			* Takes a JSON encoded string and converts it into a PHP variable.
60			*
61			* The parameters exactly match PHP's json_decode() function - see
62			* http://php.net/manual/en/function.json-decode.php for more information.
63			*
64			* @param string $source The JSON string being decoded.
65			* @param bool $associative When TRUE, returned objects will be converted into associative arrays.
66			* @param int $depth User specified recursion depth.
67			* @param int $options Bitmask of JSON decode options.
68			*
69			* @return mixed
70			*/
71	420		public static function decode($source, $associative = false, $depth = 512, $options = 0)
72			{
73			// Try parsing with json_decode first, since that's much faster
74			// We only attempt this on PHP 7+ because 5.x doesn't parse some edge cases correctly
75	420		if (PHP_VERSION_ID >= 70000) {
76			$result = json_decode($source, $associative, $depth, $options);
77			if (json_last_error() === JSON_ERROR_NONE) {
78			return $result;
79			}
80			}
81
82			// Fall back to JSON5 if that fails
83	420		$associative = $associative === true \|\| ($associative === null && $options & JSON_OBJECT_AS_ARRAY);
84	420		$castBigIntToString = $options & JSON_BIGINT_AS_STRING;
85
86	420		$decoder = new self((string)$source, $associative, $depth, $castBigIntToString);
			0 ignored issues – show Documentation introduced 2017-11-11 13:06 UTC by Report Bug Copy Issue Report `$castBigIntToString` is of type `integer`, but the function expects a `boolean`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
87
88	420		$result = $decoder->value();
89	312		$decoder->white();
90	309		if ($decoder->currentByte) {
91	18		$decoder->throwSyntaxError('Syntax error');
92			}
93
94	291		return $result;
95			}
96
97			/**
98			* @param int $at
99			*
100			* @return null
101			*/
102	420		private function getByte($at)
103			{
104	420		if ($at >= $this->length) {
105	315		return null;
106			}
107
108	417		return $this->json[$at];
109			}
110
111			/**
112			* @return string\|null
113			*/
114	33		private function currentChar()
115			{
116	33		if ($this->at >= $this->length) {
117	12		return null;
118			}
119
120	21		return mb_substr(substr($this->json, $this->at, 4), 0, 1);
121			}
122
123			/**
124			* Parse the next character.
125			*
126			* @return null\|string
127			*/
128	390		private function next()
129			{
130			// Get the next character. When there are no more characters,
131			// return the empty string.
132	390		if ($this->currentByte === "\n" \|\| ($this->currentByte === "\r" && $this->peek() !== "\n")) {
133	282		$this->lineNumber++;
134	282		$this->currentLineStartsAt = $this->at + 1;
135	282		}
136
137	390		$this->at++;
138
139	390		return $this->currentByte = $this->getByte($this->at);
140			}
141
142			/**
143			* Parse the next character if it matches $c or fail.
144			*
145			* @param string $c
146			*
147			* @return string\|null
148			*/
149	186		private function nextOrFail($c)
150			{
151	186		if ($c !== $this->currentByte) {
152	24		$this->throwSyntaxError(sprintf(
153	24		'Expected %s instead of %s',
154	24		self::renderChar($c),
155	24		self::renderChar($this->currentChar())
156	24		));
157			}
158
159	186		return $this->next();
160			}
161
162			/**
163			* Get the next character without consuming it or
164			* assigning it to the ch variable.
165			*
166			* @return mixed
167			*/
168	39		private function peek()
169			{
170	39		return $this->getByte($this->at + 1);
171			}
172
173			/**
174			* Attempt to match a regular expression at the current position on the current line.
175			*
176			* This function will not match across multiple lines.
177			*
178			* @param string $regex
179			*
180			* @return string\|null
181			*/
182	216		private function match($regex)
183			{
184	216		$subject = substr($this->json, $this->at);
185			// Only match on the current line
186	216		if ($pos = strpos($subject, "\n")) {
187	198		$subject = substr($subject, 0, $pos);
188	198		}
189
190	216		if (!preg_match($regex, $subject, $matches, PREG_OFFSET_CAPTURE)) {
191	15		return null;
192			}
193
194	201		$this->at += $matches[0][1] + strlen($matches[0][0]);
195	201		$this->currentByte = $this->getByte($this->at);
196
197	201		return $matches[0][0];
198			}
199
200			/**
201			* Parse an identifier.
202			*
203			* Normally, reserved words are disallowed here, but we
204			* only use this for unquoted object keys, where reserved words are allowed,
205			* so we don't check for those here. References:
206			* - http://es5.github.com/#x7.6
207			* - https://developer.mozilla.org/en/Core_JavaScript_1.5_Guide/Core_Language_Features#Variables
208			* - http://docstore.mik.ua/orelly/webprog/jscript/ch02_07.htm
209			*/
210	42		private function identifier()
211			{
212			// @codingStandardsIgnoreStart
213			// Be careful when editing this regex, there are a couple Unicode characters in between here -------------vv
214	42		$match = $this->match('/^(?:[\$_\p{L}\p{Nl}]\|\\\\u[0-9A-Fa-f]{4})(?:[\$_\p{L}\p{Nl}\p{Mn}\p{Mc}\p{Nd}\p{Pc}‌‍]\|\\\\u[0-9A-Fa-f]{4})*/u');
215			// @codingStandardsIgnoreEnd
216
217	42		if ($match === null) {
218	9		$this->throwSyntaxError('Bad identifier as unquoted key');
219			}
220
221			// Un-escape escaped Unicode chars
222	33		$unescaped = preg_replace_callback('/(?:\\\\u[0-9A-Fa-f]{4})+/', function ($m) {
223	6		return json_decode('"'.$m[0].'"');
224	33		}, $match);
225
226	33		return $unescaped;
227			}
228
229	222		private function number()
230			{
231	222		$number = null;
232	222		$sign = '';
233	222		$string = '';
234	222		$base = 10;
235
236	222		if ($this->currentByte === '-' \|\| $this->currentByte === '+') {
237	99		$sign = $this->currentByte;
238	99		$this->next();
239	99		}
240
241			// support for Infinity
242	222		if ($this->currentByte === 'I') {
243	9		$this->word();
244
245	6		return ($sign === '-') ? -INF : INF;
246			}
247
248			// support for NaN
249	213		if ($this->currentByte === 'N') {
250	3		$number = $this->word();
251
252			// ignore sign as -NaN also is NaN
253	3		return $number;
254			}
255
256	210		if ($this->currentByte === '0') {
257	105		$string .= $this->currentByte;
258	105		$this->next();
259	105		if ($this->currentByte === 'x' \|\| $this->currentByte === 'X') {
260	33		$string .= $this->currentByte;
261	33		$this->next();
262	33		$base = 16;
263	105		} elseif (is_numeric($this->currentByte)) {
264	30		$this->throwSyntaxError('Octal literal');
265			}
266	75		}
267
268			switch ($base) {
269	180		case 10:
270			// @codingStandardsIgnoreStart
271	150	View Code Duplication	if ((is_numeric($this->currentByte) \|\| $this->currentByte === '.') && ($match = $this->match('/^\d\.?\d/')) !== null) {
			0 ignored issues – show Duplication introduced 2018-01-14 22:40 UTC by Report Bug Copy Issue Report This code seems to be duplicated across 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...
272	135		$string .= $match;
273	135		}
274	150	View Code Duplication	if (($this->currentByte === 'E' \|\| $this->currentByte === 'e') && ($match = $this->match('/^[Ee][-+]?\d*/')) !== null) {
			0 ignored issues – show Duplication introduced 2018-01-14 22:40 UTC by Report Bug Copy Issue Report This code seems to be duplicated across 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...
275	45		$string .= $match;
276	45		}
277			// @codingStandardsIgnoreEnd
278	150		$number = $string;
279	150		break;
280	33		case 16:
281	33		if (($match = $this->match('/^[A-Fa-f0-9]+/')) !== null) {
282	30		$string .= $match;
283	30		$number = hexdec($string);
284	30		break;
285			}
286	3		$this->throwSyntaxError('Bad hex number');
287			}
288
289	177		if ($sign === '-') {
290	33		$number = -$number;
291	33		}
292
293	177		if (!is_numeric($number) \|\| !is_finite($number)) {
294	3		$this->throwSyntaxError('Bad number');
295			}
296
297	174		if ($this->castBigIntToString) {
298	3		return $number;
299			}
300
301			// Adding 0 will automatically cast this to an int or float
302	171		return $number + 0;
303			}
304
305	93		private function string()
306			{
307	93		$string = '';
308
309	93		$delim = $this->currentByte;
310	93		$this->next();
311	93		while ($this->currentByte !== null) {
312	93		if ($this->currentByte === $delim) {
313	87		$this->next();
314
315	87		return $string;
316			}
317
318	93		if ($this->currentByte === '\\') {
319	30		if ($this->peek() === 'u' && $unicodeEscaped = $this->match('/^(?:\\\\u[A-Fa-f0-9]{4})+/')) {
320	6		$string .= json_decode('"'.$unicodeEscaped.'"');
321	6		continue;
322			}
323
324	24		$this->next();
325	24		if ($this->currentByte === "\r") {
326	6		if ($this->peek() === "\n") {
327	3		$this->next();
328	3		}
329	24		} elseif (($escapee = self::getEscapee($this->currentByte)) !== null) {
330	15		$string .= $escapee;
331	15		} else {
332	3		break;
333			}
334	93		} elseif ($this->currentByte === "\n") {
335			// unescaped newlines are invalid; see:
336			// https://github.com/json5/json5/issues/24
337			// @todo this feels special-cased; are there other invalid unescaped chars?
338	3		break;
339			} else {
340	93		$string .= $this->currentByte;
341			}
342
343	93		$this->next();
344	93		}
345
346	6		$this->throwSyntaxError('Bad string');
347			}
348
349			/**
350			* Skip an inline comment, assuming this is one.
351			*
352			* The current character should be the second / character in the // pair that begins this inline comment.
353			* To finish the inline comment, we look for a newline or the end of the text.
354			*/
355	36		private function inlineComment()
356			{
357			do {
358	36		$this->next();
359	36		if ($this->currentByte === "\n" \|\| $this->currentByte === "\r") {
360	33		$this->next();
361
362	33		return;
363			}
364	36		} while ($this->currentByte !== null);
365	3		}
366
367			/**
368			* Skip a block comment, assuming this is one.
369			*
370			* The current character should be the * character in the /* pair that begins this block comment.
371			* To finish the block comment, we look for an ending */ pair of characters,
372			* but we also watch for the end of text before the comment is terminated.
373			*/
374	21		private function blockComment()
375			{
376			do {
377	21		$this->next();
378	21		while ($this->currentByte === '*') {
379	18		$this->nextOrFail('*');
380	18		if ($this->currentByte === '/') {
381	18		$this->nextOrFail('/');
382
383	18		return;
384			}
385	3		}
386	21		} while ($this->currentByte !== null);
387
388	3		$this->throwSyntaxError('Unterminated block comment');
389			}
390
391			/**
392			* Skip a comment, whether inline or block-level, assuming this is one.
393			*/
394	57		private function comment()
395			{
396			// Comments always begin with a / character.
397	57		$this->nextOrFail('/');
398
399	57		if ($this->currentByte === '/') {
400	36		$this->inlineComment();
401	57		} elseif ($this->currentByte === '*') {
402	21		$this->blockComment();
403	18		} else {
404	3		$this->throwSyntaxError('Unrecognized comment');
405			}
406	51		}
407
408			/**
409			* Skip whitespace and comments.
410			*
411			* Note that we're detecting comments by only a single / character.
412			* This works since regular expressions are not valid JSON(5), but this will
413			* break if there are other valid values that begin with a / character!
414			*/
415	420		private function white()
416			{
417	420		while ($this->currentByte !== null) {
418	417		if ($this->currentByte === '/') {
419	57		$this->comment();
420	414		} elseif (preg_match('/^[ \t\r\n\v\f\xA0]/', $this->currentByte) === 1) {
421	297		$this->next();
422	408		} elseif (ord($this->currentByte) === 0xC2 && ord($this->peek()) === 0xA0) {
423			// Non-breaking space in UTF-8
424	3		$this->next();
425	3		$this->next();
426	3		} else {
427	408		return;
428			}
429	303		}
430	312		}
431
432			/**
433			* Matches true, false, null, etc
434			*/
435	93		private function word()
436			{
437	93		switch ($this->currentByte) {
438	93		case 't':
439	36		$this->nextOrFail('t');
440	36		$this->nextOrFail('r');
441	36		$this->nextOrFail('u');
442	36		$this->nextOrFail('e');
443	36		return true;
444	72		case 'f':
445	18		$this->nextOrFail('f');
446	18		$this->nextOrFail('a');
447	18		$this->nextOrFail('l');
448	18		$this->nextOrFail('s');
449	18		$this->nextOrFail('e');
450	18		return false;
451	57		case 'n':
452	18		$this->nextOrFail('n');
453	18		$this->nextOrFail('u');
454	18		$this->nextOrFail('l');
455	18		$this->nextOrFail('l');
456	18		return null;
457	39		case 'I':
458	18		$this->nextOrFail('I');
459	18		$this->nextOrFail('n');
460	15		$this->nextOrFail('f');
461	12		$this->nextOrFail('i');
462	12		$this->nextOrFail('n');
463	12		$this->nextOrFail('i');
464	12		$this->nextOrFail('t');
465	12		$this->nextOrFail('y');
466	12		return INF;
467	21		case 'N':
468	12		$this->nextOrFail('N');
469	12		$this->nextOrFail('a');
470	6		$this->nextOrFail('N');
471	6		return NAN;
472	9		}
473
474	9		$this->throwSyntaxError('Unexpected ' . self::renderChar($this->currentChar()));
475			}
476
477	45		private function arr()
478			{
479	45		$arr = [];
480
481	45		if (++$this->depth > $this->maxDepth) {
482	3		$this->throwSyntaxError('Maximum stack depth exceeded');
483			}
484
485	45		$this->nextOrFail('[');
486	45		$this->white();
487	45		while ($this->currentByte !== null) {
488	42		if ($this->currentByte === ']') {
489	12		$this->nextOrFail(']');
490	12		$this->depth--;
491	12		return $arr; // Potentially empty array
492			}
493			// ES5 allows omitting elements in arrays, e.g. [,] and
494			// [,null]. We don't allow this in JSON5.
495	39		if ($this->currentByte === ',') {
496	6		$this->throwSyntaxError('Missing array element');
497			}
498
499	33		$arr[] = $this->value();
500
501	30		$this->white();
502			// If there's no comma after this value, this needs to
503			// be the end of the array.
504	30		if ($this->currentByte !== ',') {
505	21		$this->nextOrFail(']');
506	18		$this->depth--;
507	18		return $arr;
508			}
509	15		$this->nextOrFail(',');
510	15		$this->white();
511	15		}
512
513	3		$this->throwSyntaxError('Invalid array');
514			}
515
516			/**
517			* Parse an object value
518			*/
519	96		private function obj()
520			{
521	96		$object = $this->associative ? [] : new \stdClass;
522
523	96		if (++$this->depth > $this->maxDepth) {
524	3		$this->throwSyntaxError('Maximum stack depth exceeded');
525			}
526
527	96		$this->nextOrFail('{');
528	96		$this->white();
529	96		while ($this->currentByte !== null) {
530	90		if ($this->currentByte === '}') {
531	21		$this->nextOrFail('}');
532	21		$this->depth--;
533	21		return $object; // Potentially empty object
534			}
535
536			// Keys can be unquoted. If they are, they need to be
537			// valid JS identifiers.
538	78		if ($this->currentByte === '"' \|\| $this->currentByte === "'") {
539	39		$key = $this->string();
540	39		} else {
541	42		$key = $this->identifier();
542			}
543
544	69		$this->white();
545	69		$this->nextOrFail(':');
546	66		if ($this->associative) {
547	45		$object[$key] = $this->value();
548	45		} else {
549	66		$object->{$key} = $this->value();
550			}
551	63		$this->white();
552			// If there's no comma after this pair, this needs to be
553			// the end of the object.
554	63		if ($this->currentByte !== ',') {
555	54		$this->nextOrFail('}');
556	48		$this->depth--;
557	48		return $object;
558			}
559	21		$this->nextOrFail(',');
560	21		$this->white();
561	21		}
562
563	6		$this->throwSyntaxError('Invalid object');
564			}
565
566			/**
567			* Parse a JSON value.
568			*
569			* It could be an object, an array, a string, a number,
570			* or a word.
571			*/
572	420		private function value()
573			{
574	420		$this->white();
575	417		switch ($this->currentByte) {
576	417		case '{':
577	96		return $this->obj();
578	384		case '[':
579	45		return $this->arr();
580	369		case '"':
581	369		case "'":
582	78		return $this->string();
583	300		case '-':
584	300		case '+':
585	300		case '.':
586	108		return $this->number();
587	195		default:
588	195		return is_numeric($this->currentByte) ? $this->number() : $this->word();
589	195		}
590			}
591
592	129		private function throwSyntaxError($message)
593			{
594			// Calculate the column number
595	129		$str = substr($this->json, $this->currentLineStartsAt, $this->at - $this->currentLineStartsAt);
596	129		$column = mb_strlen($str) + 1;
597
598	129		throw new SyntaxError($message, $this->lineNumber, $column);
599			}
600
601	33		private static function renderChar($chr)
602			{
603	33		return $chr === null ? 'EOF' : "'" . $chr . "'";
604			}
605
606			/**
607			* @param string $ch
608			*
609			* @return string\|null
610			*/
611	18		private static function getEscapee($ch)
612			{
613			switch ($ch) {
614			// @codingStandardsIgnoreStart
615	18		case "'": return "'";
616	15		case '"': return '"';
617	15		case '\\': return '\\';
618	15		case '/': return '/';
619	15		case "\n": return '';
620	6		case 'b': return chr(8);
621	6		case 'f': return "\f";
622	6		case 'n': return "\n";
623	6		case 'r': return "\r";
624	6		case 't': return "\t";
625	3		default: return null;
626			// @codingStandardsIgnoreEnd
627	3		}
628			}
629			}
630

colinodell / json5

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Json5Decoder::decode() B

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