Json5Decoder::white() - Code Metrics - Inspection of "Merge pull request #4 from colinodell/byte-offset" - colinodell/json5 - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( d426c3...66aac6 )

by Colin

created 2018-01-14 23:49 UTC

Json5Decoder::white() B

↳ Parent: Json5Decoder

Complexity

Conditions	6
Paths	5

Size

Total Lines	16
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	13
CRAP Score	6

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
cc	6
eloc	11
c	2
b	0
f	0
nc	5
nop	0
dl	0
loc	16
ccs	13
cts	13
cp	1
crap	6
rs	8.8571

<?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();
        }
    }

    /**
     * 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();
        }
    }

    /**
     * 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 $castBigIntToString
46			*/
47	376		private function __construct($json, $associative = false, $depth = 512, $castBigIntToString = false)
48			{
49	376		$this->json = $json;
50	376		$this->associative = $associative;
51	376		$this->maxDepth = $depth;
52	376		$this->castBigIntToString = $castBigIntToString;
53
54	376		$this->length = strlen($json);
55	376		$this->currentByte = $this->getByte(0);
56	376		}
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 $options Bitmask of JSON decode options.
68			*
69			* @return mixed
70			*/
71	411		public static function decode($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	411		if (PHP_VERSION_ID >= 70000) {
76	137		$result = json_decode($source, $associative, $depth, $options);
77	137		if (json_last_error() === JSON_ERROR_NONE) {
78	35		return $result;
79			}
80			}
81
82			// Fall back to JSON5 if that fails
83	376		$associative = $associative === true \|\| ($associative === null && $options & JSON_OBJECT_AS_ARRAY);
84	376		$castBigIntToString = $options & JSON_BIGINT_AS_STRING;
85
86	376		$decoder = new self((string)$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	376		$result = $decoder->value();
89	277		$decoder->white();
90	274		if ($decoder->currentByte) {
91	18		$decoder->throwSyntaxError('Syntax error');
92			}
93
94	256		return $result;
95			}
96
97			/**
98			* @param int $at
99			*
100			* @return null
101			*/
102	376		private function getByte($at)
103			{
104	376		if ($at >= $this->length) {
105	271		return null;
106			}
107
108	373		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, $this->at, 4), 0, 1);
121			}
122
123			/**
124			* Parse the next character.
125			*
126			* @return null\|string
127			*/
128	348		private function next()
129			{
130			// Get the next character. When there are no more characters,
131			// return the empty string.
132	348		if ($this->currentByte === "\n" \|\| ($this->currentByte === "\r" && $this->peek() !== "\n")) {
133	258		$this->lineNumber++;
134	258		$this->currentLineStartsAt = $this->at + 1;
135	188		}
136
137	348		$this->at++;
138
139	348		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 $c
146			*
147			* @return string\|null
148			*/
149	167		private function nextOrFail($c)
150			{
151	167		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	16		));
157			}
158
159	167		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	37		private function peek()
169			{
170	37		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 $regex
179			*
180			* @return string\|null
181			*/
182	195		private function match($regex)
183			{
184	195		$subject = substr($this->json, $this->at);
185			// Only match on the current line
186	195		if ($pos = strpos($subject, "\n")) {
187	180		$subject = substr($subject, 0, $pos);
188	132		}
189
190	195		if (!preg_match($regex, $subject, $matches, PREG_OFFSET_CAPTURE)) {
191	15		return null;
192			}
193
194	180		$this->at += $matches[0][1] + strlen($matches[0][0]);
195	180		$this->currentByte = $this->getByte($this->at);
196
197	180		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	200		private function number()
230			{
231	200		$number = null;
232	200		$sign = '';
233	200		$string = '';
234	200		$base = 10;
235
236	200		if ($this->currentByte === '-' \|\| $this->currentByte === '+') {
237	94		$sign = $this->currentByte;
238	94		$this->next();
239	66		}
240
241			// support for Infinity
242	200		if ($this->currentByte === 'I') {
243	9		$this->word();
244
245	6		return ($sign === '-') ? -INF : INF;
246			}
247
248			// support for NaN
249	191		if ($this->currentByte === 'N') {
250	3		$number = $this->word();
251
252			// ignore sign as -NaN also is NaN
253	3		return $number;
254			}
255
256	188		if ($this->currentByte === '0') {
257	97		$string .= $this->currentByte;
258	97		$this->next();
259	97		if ($this->currentByte === 'x' \|\| $this->currentByte === 'X') {
260	33		$string .= $this->currentByte;
261	33		$this->next();
262	33		$base = 16;
263	86		} elseif (is_numeric($this->currentByte)) {
264	30		$this->throwSyntaxError('Octal literal');
265			}
266	50		}
267
268			switch ($base) {
269	158		case 10:
270			// @codingStandardsIgnoreStart
271	128	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	117		$string .= $match;
273	90		}
274	128	View Code Duplication	if (($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	37		$string .= $match;
276	30		}
277			// @codingStandardsIgnoreEnd
278	128		$number = $string;
279	128		break;
280	33		case 16:
281	33		if (($match = $this->match('/^[A-Fa-f0-9]+/')) !== null) {
282	30		$string .= $match;
283	30		$number = hexdec($string);
284	30		break;
285			}
286	3		$this->throwSyntaxError('Bad hex number');
287			}
288
289	155		if ($sign === '-') {
290	28		$number = -$number;
291	22		}
292
293	155		if (!is_numeric($number) \|\| !is_finite($number)) {
294	3		$this->throwSyntaxError('Bad number');
295			}
296
297	152		if ($this->castBigIntToString) {
298	2		return $number;
299			}
300
301			// Adding 0 will automatically cast this to an int or float
302	150		return $number + 0;
303			}
304
305	83		private function string()
306			{
307	83		$string = '';
308
309	83		$delim = $this->currentByte;
310	83		$this->next();
311	83		while ($this->currentByte !== null) {
312	83		if ($this->currentByte === $delim) {
313	77		$this->next();
314
315	77		return $string;
316			}
317
318	83		if ($this->currentByte === '\\') {
319	28		if ($this->peek() === 'u' && $unicodeEscaped = $this->match('/^(?:\\\\u[A-Fa-f0-9]{4})+/')) {
320	4		$string .= json_decode('"'.$unicodeEscaped.'"');
321	4		continue;
322			}
323
324	24		$this->next();
325	24		if ($this->currentByte === "\r") {
326	6		if ($this->peek() === "\n") {
327	4		$this->next();
328	2		}
329	22		} elseif (($escapee = self::getEscapee($this->currentByte)) !== null) {
330	15		$string .= $escapee;
331	10		} else {
332	10		break;
333			}
334	83		} elseif ($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	83		$string .= $this->currentByte;
341			}
342
343	83		$this->next();
344	62		}
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		$this->nextOrFail('/');
382
383	18		return;
384			}
385	2		}
386	21		} while ($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		$this->inlineComment();
401	46		} elseif ($this->currentByte === '*') {
402	21		$this->blockComment();
403	12		} else {
404	3		$this->throwSyntaxError('Unrecognized comment');
405			}
406	51		}
407
408			/**
409			* Skip whitespace and comments.
410			*
411			* Note that we're detecting comments by only a single / character.
412			* This works since regular expressions are not valid JSON(5), but this will
413			* break if there are other valid values that begin with a / character!
414			*/
415	376		private function white()
416			{
417	376		while ($this->currentByte !== null) {
418	373		if ($this->currentByte === '/') {
419	57		$this->comment();
420	368		} elseif (preg_match('/^[ \t\r\n\v\f\xA0]/', $this->currentByte) === 1) {
421	270		$this->next();
422	364		} elseif (ord($this->currentByte) === 0xC2 && ord($this->peek()) === 0xA0) {
423			// Non-breaking space in UTF-8
424	3		$this->next();
425	3		$this->next();
426	2		} else {
427	364		return;
428			}
429	202		}
430	268		}
431
432			/**
433			* Matches true, false, null, etc
434			*/
435	88		private function word()
436			{
437	88		switch ($this->currentByte) {
438	88		case 't':
439	31		$this->nextOrFail('t');
440	31		$this->nextOrFail('r');
441	31		$this->nextOrFail('u');
442	31		$this->nextOrFail('e');
443	31		return true;
444	69		case 'f':
445	15		$this->nextOrFail('f');
446	15		$this->nextOrFail('a');
447	15		$this->nextOrFail('l');
448	15		$this->nextOrFail('s');
449	15		$this->nextOrFail('e');
450	15		return false;
451	56		case 'n':
452	17		$this->nextOrFail('n');
453	17		$this->nextOrFail('u');
454	17		$this->nextOrFail('l');
455	17		$this->nextOrFail('l');
456	17		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	6		}
473
474	9		$this->throwSyntaxError('Unexpected ' . self::renderChar($this->currentChar()));
475			}
476
477	37		private function arr()
478			{
479	37		$arr = [];
480
481	37		if (++$this->depth > $this->maxDepth) {
482	3		$this->throwSyntaxError('Maximum stack depth exceeded');
483			}
484
485	37		$this->nextOrFail('[');
486	37		$this->white();
487	37		while ($this->currentByte !== null) {
488	37		if ($this->currentByte === ']') {
489	11		$this->nextOrFail(']');
490	11		$this->depth--;
491	11		return $arr; // Potentially empty array
492			}
493			// ES5 allows omitting elements in arrays, e.g. [,] and
494			// [,null]. We don't allow this in JSON5.
495	35		if ($this->currentByte === ',') {
496	6		$this->throwSyntaxError('Missing array element');
497			}
498
499	29		$arr[] = $this->value();
500
501	26		$this->white();
502			// If there's no comma after this value, this needs to
503			// be the end of the array.
504	26		if ($this->currentByte !== ',') {
505	17		$this->nextOrFail(']');
506	14		$this->depth--;
507	14		return $arr;
508			}
509	13		$this->nextOrFail(',');
510	13		$this->white();
511	10		}
512			}
513
514			/**
515			* Parse an object value
516			*/
517	84		private function obj()
518			{
519	84		$object = $this->associative ? [] : new \stdClass;
520
521	84		if (++$this->depth > $this->maxDepth) {
522	3		$this->throwSyntaxError('Maximum stack depth exceeded');
523			}
524
525	84		$this->nextOrFail('{');
526	84		$this->white();
527	84		while ($this->currentByte !== null) {
528	84		if ($this->currentByte === '}') {
529	20		$this->nextOrFail('}');
530	20		$this->depth--;
531	20		return $object; // Potentially empty object
532			}
533
534			// Keys can be unquoted. If they are, they need to be
535			// valid JS identifiers.
536	73		if ($this->currentByte === '"' \|\| $this->currentByte === "'") {
537	34		$key = $this->string();
538	26		} else {
539	42		$key = $this->identifier();
540			}
541
542	64		$this->white();
543	64		$this->nextOrFail(':');
544	61		if ($this->associative) {
545	43		$object[$key] = $this->value();
546	30		} else {
547	61		$object->{$key} = $this->value();
548			}
549	58		$this->white();
550			// If there's no comma after this pair, this needs to be
551			// the end of the object.
552	58		if ($this->currentByte !== ',') {
553	49		$this->nextOrFail('}');
554	43		$this->depth--;
555	43		return $object;
556			}
557	19		$this->nextOrFail(',');
558	19		$this->white();
559	14		}
560			}
561
562			/**
563			* Parse a JSON value.
564			*
565			* It could be an object, an array, a string, a number,
566			* or a word.
567			*/
568	376		private function value()
569			{
570	376		$this->white();
571	373		switch ($this->currentByte) {
572	373		case '{':
573	84		return $this->obj();
574	347		case '[':
575	37		return $this->arr();
576	336		case '"':
577	326		case "'":
578	71		return $this->string();
579	273		case '-':
580	263		case '+':
581	246		case '.':
582	103		return $this->number();
583	130		default:
584	173		return is_numeric($this->currentByte) ? $this->number() : $this->word();
585	130		}
586			}
587
588	120		private function throwSyntaxError($message)
589			{
590			// Calculate the column number
591	120		$str = substr($this->json, $this->currentLineStartsAt, $this->at - $this->currentLineStartsAt);
592	120		$column = mb_strlen($str) + 1;
593
594	120		throw new SyntaxError($message, $this->lineNumber, $column);
595			}
596
597	33		private static function renderChar($chr)
598			{
599	33		return $chr === null ? 'EOF' : "'" . $chr . "'";
600			}
601
602			/**
603			* @param string $ch
604			*
605			* @return string\|null
606			*/
607	18		private static function getEscapee($ch)
608			{
609			switch ($ch) {
610			// @codingStandardsIgnoreStart
611	18		case "'": return "'";
612	15		case '"': return '"';
613	15		case '\\': return '\\';
614	15		case '/': return '/';
615	15		case "\n": return '';
616	6		case 'b': return chr(8);
617	6		case 'f': return "\f";
618	6		case 'n': return "\n";
619	6		case 'r': return "\r";
620	6		case 't': return "\t";
621	3		default: return null;
622			// @codingStandardsIgnoreEnd
623	2		}
624			}
625			}
626

colinodell / json5

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Json5Decoder::white() B

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