JSMin::action() - Code Metrics - Inspection of "composer install --no-dev" - gctools-outilsgc/gcconnex - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — composer-installed ( 5832b4 )

by Ilia

created 2019-08-12 20:52 UTC

JSMin::action() F

↳ Parent: JSMin

Complexity

Conditions	27
Paths	312

Size

Total Lines

104

Duplication

Lines	10
Ratio	9.62 %

Importance

Changes

Metric	Value
cc	27
nc	312
nop	1
dl	10
loc	104
rs	1.5466
c	0
b	0
f	0

How to fix Long Method Complexity

<?php
/**
 * JSMin.php - modified PHP implementation of Douglas Crockford's JSMin.
 *
 * <code>
 * $minifiedJs = JSMin::minify($js);
 * </code>
 *
 * This is a modified port of jsmin.c. Improvements:
 *
 * Does not choke on some regexp literals containing quote characters. E.g. /'/
 *
 * Spaces are preserved after some add/sub operators, so they are not mistakenly
 * converted to post-inc/dec. E.g. a + ++b -> a+ ++b
 *
 * Preserves multi-line comments that begin with /*!
 *
 * PHP 5 or higher is required.
 *
 * Permission is hereby granted to use this version of the library under the
 * same terms as jsmin.c, which has the following license:
 *
 * --
 * Copyright (c) 2002 Douglas Crockford  (www.crockford.com)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * The Software shall be used for Good, not Evil.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 * --
 *
 * @package JSMin
 * @author Ryan Grove <[email protected]> (PHP port)
 * @author Steve Clay <[email protected]> (modifications + cleanup)
 * @author Andrea Giammarchi <http://www.3site.eu> (spaceBeforeRegExp)
 * @copyright 2002 Douglas Crockford <[email protected]> (jsmin.c)
 * @copyright 2008 Ryan Grove <[email protected]> (PHP port)
 * @license http://opensource.org/licenses/mit-license.php MIT License
 * @link http://code.google.com/p/jsmin-php/
 */

class JSMin {
    const ORD_LF            = 10;
    const ORD_SPACE         = 32;
    const ACTION_KEEP_A     = 1;
    const ACTION_DELETE_A   = 2;
    const ACTION_DELETE_A_B = 3;

    protected $a           = "\n";
    protected $b           = '';
    protected $input       = '';
    protected $inputIndex  = 0;
    protected $inputLength = 0;
    protected $lookAhead   = null;
    protected $output      = '';
    protected $lastByteOut  = '';
    protected $keptComment = '';

    /**
     * Minify Javascript.
     *
     * @param string $js Javascript to be minified
     *
     * @return string
     */
    public static function minify($js)
    {
        $jsmin = new JSMin($js);
        return $jsmin->min();
    }

    /**
     * @param string $input
     */
    public function __construct($input)
    {
        $this->input = $input;
    }

    /**
     * Perform minification, return result
     *
     * @return string
     */
    public function min()
    {
        if ($this->output !== '') { // min already run
            return $this->output;
        }

        $mbIntEnc = null;
        if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
            $mbIntEnc = mb_internal_encoding();
            mb_internal_encoding('8bit');
        }

        if (isset($this->input[0]) && $this->input[0] === "\xef") {
            $this->input = substr($this->input, 3);
        }

        $this->input = str_replace("\r\n", "\n", $this->input);
        $this->inputLength = strlen($this->input);

        $this->action(self::ACTION_DELETE_A_B);

        while ($this->a !== null) {
            // determine next command
            $command = self::ACTION_KEEP_A; // default
            if ($this->a === ' ') {
                if (($this->lastByteOut === '+' || $this->lastByteOut === '-')
                        && ($this->b === $this->lastByteOut)) {
                    // Don't delete this space. If we do, the addition/subtraction
                    // could be parsed as a post-increment
                } elseif (! $this->isAlphaNum($this->b)) {
                    $command = self::ACTION_DELETE_A;
                }
            } elseif ($this->a === "\n") {
                if ($this->b === ' ') {
                    $command = self::ACTION_DELETE_A_B;

                    // in case of mbstring.func_overload & 2, must check for null b,
                    // otherwise mb_strpos will give WARNING
                } elseif ($this->b === null
                          || (false === strpos('{[(+-!~', $this->b)
                              && ! $this->isAlphaNum($this->b))) {
                    $command = self::ACTION_DELETE_A;
                }
            } elseif (! $this->isAlphaNum($this->a)) {
                if ($this->b === ' '
                    || ($this->b === "\n"
                        && (false === strpos('}])+-"\'', $this->a)))) {
                    $command = self::ACTION_DELETE_A_B;
                }
            }
            $this->action($command);
        }
        $this->output = trim($this->output);

        if ($mbIntEnc !== null) {
            mb_internal_encoding($mbIntEnc);
        }
        return $this->output;
    }

    /**
     * ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
     * ACTION_DELETE_A = Copy B to A. Get the next B.
     * ACTION_DELETE_A_B = Get the next B.
     *
     * @param int $command
     * @throws JSMin_UnterminatedRegExpException|JSMin_UnterminatedStringException
     */
    protected function action($command)
    {
        // make sure we don't compress "a + ++b" to "a+++b", etc.
        if ($command === self::ACTION_DELETE_A_B
            && $this->b === ' '
            && ($this->a === '+' || $this->a === '-')) {
            // Note: we're at an addition/substraction operator; the inputIndex
            // will certainly be a valid index
            if ($this->input[$this->inputIndex] === $this->a) {
                // This is "+ +" or "- -". Don't delete the space.
                $command = self::ACTION_KEEP_A;
            }
        }

        switch ($command) {
            case self::ACTION_KEEP_A: // 1
                $this->output .= $this->a;

                if ($this->keptComment) {
                    $this->output = rtrim($this->output, "\n");
                    $this->output .= $this->keptComment;
                    $this->keptComment = '';
                }

                $this->lastByteOut = $this->a;

                // fallthrough intentional
            case self::ACTION_DELETE_A: // 2
                $this->a = $this->b;
                if ($this->a === "'" || $this->a === '"') { // string literal
                    $str = $this->a; // in case needed for exception
                    for(;;) {
                        $this->output .= $this->a;
                        $this->lastByteOut = $this->a;

                        $this->a = $this->get();
                        if ($this->a === $this->b) { // end quote
                            break;
                        }
                        if ($this->isEOF($this->a)) {
                            $byte = $this->inputIndex - 1;
                            throw new JSMin_UnterminatedStringException(
                                "JSMin: Unterminated String at byte {$byte}: {$str}");
                        }
                        $str .= $this->a;
                        if ($this->a === '\\') {
                            $this->output .= $this->a;
                            $this->lastByteOut = $this->a;

                            $this->a       = $this->get();
                            $str .= $this->a;
                        }
                    }
                }

                // fallthrough intentional
            case self::ACTION_DELETE_A_B: // 3
                $this->b = $this->next();
                if ($this->b === '/' && $this->isRegexpLiteral()) {
                    $this->output .= $this->a . $this->b;
                    $pattern = '/'; // keep entire pattern in case we need to report it in the exception
                    for(;;) {
                        $this->a = $this->get();
                        $pattern .= $this->a;
                        if ($this->a === '[') {
                            for(;;) {
                                $this->output .= $this->a;
                                $this->a = $this->get();
                                $pattern .= $this->a;
                                if ($this->a === ']') {
                                    break;
                                }
                                if ($this->a === '\\') {
                                    $this->output .= $this->a;
                                    $this->a = $this->get();
                                    $pattern .= $this->a;
                                }
                                if ($this->isEOF($this->a)) {
                                    throw new JSMin_UnterminatedRegExpException(
                                        "JSMin: Unterminated set in RegExp at byte "
                                            . $this->inputIndex .": {$pattern}");
                                }
                            }
                        }

                        if ($this->a === '/') { // end pattern
                            break; // while (true)
                        } elseif ($this->a === '\\') {
                            $this->output .= $this->a;
                            $this->a = $this->get();
                            $pattern .= $this->a;
                        } elseif ($this->isEOF($this->a)) {
                            $byte = $this->inputIndex - 1;
                            throw new JSMin_UnterminatedRegExpException(
                                "JSMin: Unterminated RegExp at byte {$byte}: {$pattern}");
                        }
                        $this->output .= $this->a;
                        $this->lastByteOut = $this->a;
                    }
                    $this->b = $this->next();
                }
            // end case ACTION_DELETE_A_B
        }
    }

    /**
     * @return bool
     */
    protected function isRegexpLiteral()
    {
        if (false !== strpos("(,=:[!&|?+-~*{;", $this->a)) {
            // we can't divide after these tokens
            return true;
        }

        // check if first non-ws token is "/" (see starts-regex.js)
        $length = strlen($this->output);
        if ($this->a === ' ' || $this->a === "\n") {
            if ($length < 2) { // weird edge case
                return true;
            }
        }

        // if the "/" follows a keyword, it must be a regexp, otherwise it's best to assume division

        $subject = $this->output . trim($this->a);
        if (!preg_match('/(?:case|else|in|return|typeof)$/', $subject, $m)) {
            // not a keyword
            return false;
        }

        // can't be sure it's a keyword yet (see not-regexp.js)
        $charBeforeKeyword = substr($subject, 0 - strlen($m[0]) - 1, 1);
        if ($this->isAlphaNum($charBeforeKeyword)) {
            // this is really an identifier ending in a keyword, e.g. "xreturn"
            return false;
        }

        // it's a regexp. Remove unneeded whitespace after keyword
        if ($this->a === ' ' || $this->a === "\n") {
            $this->a = '';
        }

        return true;
    }

    /**
     * Return the next character from stdin. Watch out for lookahead. If the character is a control character,
     * translate it to a space or linefeed.
     *
     * @return string
     */
    protected function get()
    {
        $c = $this->lookAhead;
        $this->lookAhead = null;
        if ($c === null) {
            // getc(stdin)
            if ($this->inputIndex < $this->inputLength) {
                $c = $this->input[$this->inputIndex];
                $this->inputIndex += 1;
            } else {
                $c = null;
            }
        }
        if (ord($c) >= self::ORD_SPACE || $c === "\n" || $c === null) {
            return $c;
        }
        if ($c === "\r") {
            return "\n";
        }
        return ' ';
    }

    /**
     * Does $a indicate end of input?
     *
     * @param string $a
     * @return bool
     */
    protected function isEOF($a)
    {
        return ord($a) <= self::ORD_LF;
    }

    /**
     * Get next char (without getting it). If is ctrl character, translate to a space or newline.
     *
     * @return string
     */
    protected function peek()
    {
        $this->lookAhead = $this->get();
        return $this->lookAhead;
    }

    /**
     * Return true if the character is a letter, digit, underscore, dollar sign, or non-ASCII character.
     *
     * @param string $c
     *
     * @return bool
     */
    protected function isAlphaNum($c)
    {
        return (preg_match('/^[a-z0-9A-Z_\\$\\\\]$/', $c) || ord($c) > 126);
    }

    /**
     * Consume a single line comment from input (possibly retaining it)
     */
    protected function consumeSingleLineComment()
    {
        $comment = '';
        while (true) {
            $get = $this->get();
            $comment .= $get;
            if (ord($get) <= self::ORD_LF) { // end of line reached
                // if IE conditional comment
                if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
                    $this->keptComment .= "/{$comment}";
                }
                return;
            }
        }
    }

    /**
     * Consume a multiple line comment from input (possibly retaining it)
     *
     * @throws JSMin_UnterminatedCommentException
     */
    protected function consumeMultipleLineComment()
    {
        $this->get();
        $comment = '';
        for(;;) {
            $get = $this->get();
            if ($get === '*') {
                if ($this->peek() === '/') { // end of comment reached
                    $this->get();
                    if (0 === strpos($comment, '!')) {
                        // preserved by YUI Compressor
                        if (!$this->keptComment) {
                            // don't prepend a newline if two comments right after one another
                            $this->keptComment = "\n";
                        }
                        $this->keptComment .= "/*!" . substr($comment, 1) . "*/\n";
                    } else if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
                        // IE conditional
                        $this->keptComment .= "/*{$comment}*/";
                    }
                    return;
                }
            } elseif ($get === null) {
                throw new JSMin_UnterminatedCommentException(
                    "JSMin: Unterminated comment at byte {$this->inputIndex}: /*{$comment}");
            }
            $comment .= $get;
        }
    }

    /**
     * Get the next character, skipping over comments. Some comments may be preserved.
     *
     * @return string
     */
    protected function next()
    {
        $get = $this->get();
        if ($get === '/') {
            switch ($this->peek()) {
                case '/':
                    $this->consumeSingleLineComment();
                    $get = "\n";
                    break;
                case '*':
                    $this->consumeMultipleLineComment();
                    $get = ' ';
                    break;
            }
        }
        return $get;
    }
}

class JSMin_UnterminatedStringException extends Exception {}
class JSMin_UnterminatedCommentException extends Exception {}
class JSMin_UnterminatedRegExpException extends Exception {}


1		<?php
2		/**
3		* JSMin.php - modified PHP implementation of Douglas Crockford's JSMin.
4		*
5		* <code>
6		* $minifiedJs = JSMin::minify($js);
7		* </code>
8		*
9		* This is a modified port of jsmin.c. Improvements:
10		*
11		* Does not choke on some regexp literals containing quote characters. E.g. /'/
12		*
13		* Spaces are preserved after some add/sub operators, so they are not mistakenly
14		* converted to post-inc/dec. E.g. a + ++b -> a+ ++b
15		*
16		* Preserves multi-line comments that begin with /*!
17		*
18		* PHP 5 or higher is required.
19		*
20		* Permission is hereby granted to use this version of the library under the
21		* same terms as jsmin.c, which has the following license:
22		*
23		* --
24		* Copyright (c) 2002 Douglas Crockford (www.crockford.com)
25		*
26		* Permission is hereby granted, free of charge, to any person obtaining a copy of
27		* this software and associated documentation files (the "Software"), to deal in
28		* the Software without restriction, including without limitation the rights to
29		* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
30		* of the Software, and to permit persons to whom the Software is furnished to do
31		* so, subject to the following conditions:
32		*
33		* The above copyright notice and this permission notice shall be included in all
34		* copies or substantial portions of the Software.
35		*
36		* The Software shall be used for Good, not Evil.
37		*
38		* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
39		* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
40		* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
41		* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
42		* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
43		* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
44		* SOFTWARE.
45		* --
46		*
47		* @package JSMin
48		* @author Ryan Grove <[email protected]> (PHP port)
49		* @author Steve Clay <[email protected]> (modifications + cleanup)
50		* @author Andrea Giammarchi <http://www.3site.eu> (spaceBeforeRegExp)
51		* @copyright 2002 Douglas Crockford <[email protected]> (jsmin.c)
52		* @copyright 2008 Ryan Grove <[email protected]> (PHP port)
53		* @license http://opensource.org/licenses/mit-license.php MIT License
54		* @link http://code.google.com/p/jsmin-php/
55		*/
56
57		class JSMin {
58		const ORD_LF = 10;
59		const ORD_SPACE = 32;
60		const ACTION_KEEP_A = 1;
61		const ACTION_DELETE_A = 2;
62		const ACTION_DELETE_A_B = 3;
63
64		protected $a = "\n";
65		protected $b = '';
66		protected $input = '';
67		protected $inputIndex = 0;
68		protected $inputLength = 0;
69		protected $lookAhead = null;
70		protected $output = '';
71		protected $lastByteOut = '';
72		protected $keptComment = '';
73
74		/**
75		* Minify Javascript.
76		*
77		* @param string $js Javascript to be minified
78		*
79		* @return string
80		*/
81		public static function minify($js)
82		{
83		$jsmin = new JSMin($js);
84		return $jsmin->min();
85		}
86
87		/**
88		* @param string $input
89		*/
90		public function __construct($input)
91		{
92		$this->input = $input;
93		}
94
95		/**
96		* Perform minification, return result
97		*
98		* @return string
99		*/
100		public function min()
101		{
102		if ($this->output !== '') { // min already run
103		return $this->output;
104		}
105
106		$mbIntEnc = null;
107	View Code Duplication	if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
108		$mbIntEnc = mb_internal_encoding();
109		mb_internal_encoding('8bit');
110		}
111
112		if (isset($this->input[0]) && $this->input[0] === "\xef") {
113		$this->input = substr($this->input, 3);
114		}
115
116		$this->input = str_replace("\r\n", "\n", $this->input);
117		$this->inputLength = strlen($this->input);
118
119		$this->action(self::ACTION_DELETE_A_B);
120
121		while ($this->a !== null) {
122		// determine next command
123		$command = self::ACTION_KEEP_A; // default
124		if ($this->a === ' ') {
125		if (($this->lastByteOut === '+' \|\| $this->lastByteOut === '-')
126		&& ($this->b === $this->lastByteOut)) {
127		// Don't delete this space. If we do, the addition/subtraction
128		// could be parsed as a post-increment
129		} elseif (! $this->isAlphaNum($this->b)) {
130		$command = self::ACTION_DELETE_A;
131		}
132		} elseif ($this->a === "\n") {
133		if ($this->b === ' ') {
134		$command = self::ACTION_DELETE_A_B;
135
136		// in case of mbstring.func_overload & 2, must check for null b,
137		// otherwise mb_strpos will give WARNING
138		} elseif ($this->b === null
139		\|\| (false === strpos('{[(+-!~', $this->b)
140		&& ! $this->isAlphaNum($this->b))) {
141		$command = self::ACTION_DELETE_A;
142		}
143		} elseif (! $this->isAlphaNum($this->a)) {
144		if ($this->b === ' '
145		\|\| ($this->b === "\n"
146		&& (false === strpos('}])+-"\'', $this->a)))) {
147		$command = self::ACTION_DELETE_A_B;
148		}
149		}
150		$this->action($command);
151		}
152		$this->output = trim($this->output);
153
154		if ($mbIntEnc !== null) {
155		mb_internal_encoding($mbIntEnc);
156		}
157		return $this->output;
158		}
159
160		/**
161		* ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
162		* ACTION_DELETE_A = Copy B to A. Get the next B.
163		* ACTION_DELETE_A_B = Get the next B.
164		*
165		* @param int $command
166		* @throws JSMin_UnterminatedRegExpException\|JSMin_UnterminatedStringException
167		*/
168		protected function action($command)
169		{
170		// make sure we don't compress "a + ++b" to "a+++b", etc.
171		if ($command === self::ACTION_DELETE_A_B
172		&& $this->b === ' '
173		&& ($this->a === '+' \|\| $this->a === '-')) {
174		// Note: we're at an addition/substraction operator; the inputIndex
175		// will certainly be a valid index
176		if ($this->input[$this->inputIndex] === $this->a) {
177		// This is "+ +" or "- -". Don't delete the space.
178		$command = self::ACTION_KEEP_A;
179		}
180		}
181
182		switch ($command) {
183		case self::ACTION_KEEP_A: // 1
184		$this->output .= $this->a;
185
186		if ($this->keptComment) {
187		$this->output = rtrim($this->output, "\n");
188		$this->output .= $this->keptComment;
189		$this->keptComment = '';
190		}
191
192		$this->lastByteOut = $this->a;
193
194		// fallthrough intentional
195		case self::ACTION_DELETE_A: // 2
196		$this->a = $this->b;
197		if ($this->a === "'" \|\| $this->a === '"') { // string literal
198		$str = $this->a; // in case needed for exception
199		for(;;) {
200		$this->output .= $this->a;
201		$this->lastByteOut = $this->a;
202
203		$this->a = $this->get();
204		if ($this->a === $this->b) { // end quote
205		break;
206		}
207		if ($this->isEOF($this->a)) {
208		$byte = $this->inputIndex - 1;
209		throw new JSMin_UnterminatedStringException(
210		"JSMin: Unterminated String at byte {$byte}: {$str}");
211		}
212		$str .= $this->a;
213		if ($this->a === '\\') {
214		$this->output .= $this->a;
215		$this->lastByteOut = $this->a;
216
217		$this->a = $this->get();
218		$str .= $this->a;
219		}
220		}
221		}
222
223		// fallthrough intentional
224		case self::ACTION_DELETE_A_B: // 3
225		$this->b = $this->next();
226		if ($this->b === '/' && $this->isRegexpLiteral()) {
227		$this->output .= $this->a . $this->b;
228		$pattern = '/'; // keep entire pattern in case we need to report it in the exception
229		for(;;) {
230		$this->a = $this->get();
231		$pattern .= $this->a;
232		if ($this->a === '[') {
233		for(;;) {
234		$this->output .= $this->a;
235		$this->a = $this->get();
236		$pattern .= $this->a;
237		if ($this->a === ']') {
238		break;
239		}
240	View Code Duplication	if ($this->a === '\\') {
241		$this->output .= $this->a;
242		$this->a = $this->get();
243		$pattern .= $this->a;
244		}
245		if ($this->isEOF($this->a)) {
246		throw new JSMin_UnterminatedRegExpException(
247		"JSMin: Unterminated set in RegExp at byte "
248		. $this->inputIndex .": {$pattern}");
249		}
250		}
251		}
252
253		if ($this->a === '/') { // end pattern
254		break; // while (true)
255	View Code Duplication	} elseif ($this->a === '\\') {
256		$this->output .= $this->a;
257		$this->a = $this->get();
258		$pattern .= $this->a;
259		} elseif ($this->isEOF($this->a)) {
260		$byte = $this->inputIndex - 1;
261		throw new JSMin_UnterminatedRegExpException(
262		"JSMin: Unterminated RegExp at byte {$byte}: {$pattern}");
263		}
264		$this->output .= $this->a;
265		$this->lastByteOut = $this->a;
266		}
267		$this->b = $this->next();
268		}
269		// end case ACTION_DELETE_A_B
270		}
271		}
272
273		/**
274		* @return bool
275		*/
276		protected function isRegexpLiteral()
277		{
278		if (false !== strpos("(,=:[!&\|?+-~*{;", $this->a)) {
279		// we can't divide after these tokens
280		return true;
281		}
282
283		// check if first non-ws token is "/" (see starts-regex.js)
284		$length = strlen($this->output);
285		if ($this->a === ' ' \|\| $this->a === "\n") {
286		if ($length < 2) { // weird edge case
287		return true;
288		}
289		}
290
291		// if the "/" follows a keyword, it must be a regexp, otherwise it's best to assume division
292
293		$subject = $this->output . trim($this->a);
294		if (!preg_match('/(?:case\|else\|in\|return\|typeof)$/', $subject, $m)) {
295		// not a keyword
296		return false;
297		}
298
299		// can't be sure it's a keyword yet (see not-regexp.js)
300		$charBeforeKeyword = substr($subject, 0 - strlen($m[0]) - 1, 1);
301		if ($this->isAlphaNum($charBeforeKeyword)) {
302		// this is really an identifier ending in a keyword, e.g. "xreturn"
303		return false;
304		}
305
306		// it's a regexp. Remove unneeded whitespace after keyword
307		if ($this->a === ' ' \|\| $this->a === "\n") {
308		$this->a = '';
309		}
310
311		return true;
312		}
313
314		/**
315		* Return the next character from stdin. Watch out for lookahead. If the character is a control character,
316		* translate it to a space or linefeed.
317		*
318		* @return string
319		*/
320		protected function get()
321		{
322		$c = $this->lookAhead;
323		$this->lookAhead = null;
324		if ($c === null) {
325		// getc(stdin)
326		if ($this->inputIndex < $this->inputLength) {
327		$c = $this->input[$this->inputIndex];
328		$this->inputIndex += 1;
329		} else {
330		$c = null;
331		}
332		}
333		if (ord($c) >= self::ORD_SPACE \|\| $c === "\n" \|\| $c === null) {
334		return $c;
335		}
336		if ($c === "\r") {
337		return "\n";
338		}
339		return ' ';
340		}
341
342		/**
343		* Does $a indicate end of input?
344		*
345		* @param string $a
346		* @return bool
347		*/
348		protected function isEOF($a)
349		{
350		return ord($a) <= self::ORD_LF;
351		}
352
353		/**
354		* Get next char (without getting it). If is ctrl character, translate to a space or newline.
355		*
356		* @return string
357		*/
358		protected function peek()
359		{
360		$this->lookAhead = $this->get();
361		return $this->lookAhead;
362		}
363
364		/**
365		* Return true if the character is a letter, digit, underscore, dollar sign, or non-ASCII character.
366		*
367		* @param string $c
368		*
369		* @return bool
370		*/
371		protected function isAlphaNum($c)
372		{
373		return (preg_match('/^[a-z0-9A-Z_\\$\\\\]$/', $c) \|\| ord($c) > 126);
374		}
375
376		/**
377		* Consume a single line comment from input (possibly retaining it)
378		*/
379		protected function consumeSingleLineComment()
380		{
381		$comment = '';
382		while (true) {
383		$get = $this->get();
384		$comment .= $get;
385		if (ord($get) <= self::ORD_LF) { // end of line reached
386		// if IE conditional comment
387		if (preg_match('/^\\/@(?:cc_on\|if\|elif\|else\|end)\\b/', $comment)) {
388		$this->keptComment .= "/{$comment}";
389		}
390		return;
391		}
392		}
393		}
394
395		/**
396		* Consume a multiple line comment from input (possibly retaining it)
397		*
398		* @throws JSMin_UnterminatedCommentException
399		*/
400		protected function consumeMultipleLineComment()
401		{
402		$this->get();
403		$comment = '';
404		for(;;) {
405		$get = $this->get();
406		if ($get === '*') {
407		if ($this->peek() === '/') { // end of comment reached
408		$this->get();
409		if (0 === strpos($comment, '!')) {
410		// preserved by YUI Compressor
411		if (!$this->keptComment) {
412		// don't prepend a newline if two comments right after one another
413		$this->keptComment = "\n";
414		}
415		$this->keptComment .= "/!" . substr($comment, 1) . "/\n";
416		} else if (preg_match('/^@(?:cc_on\|if\|elif\|else\|end)\\b/', $comment)) {
417		// IE conditional
418		$this->keptComment .= "/{$comment}/";
419		}
420		return;
421		}
422		} elseif ($get === null) {
423		throw new JSMin_UnterminatedCommentException(
424		"JSMin: Unterminated comment at byte {$this->inputIndex}: /*{$comment}");
425		}
426		$comment .= $get;
427		}
428		}
429
430		/**
431		* Get the next character, skipping over comments. Some comments may be preserved.
432		*
433		* @return string
434		*/
435		protected function next()
436		{
437		$get = $this->get();
438		if ($get === '/') {
439		switch ($this->peek()) {
440		case '/':
441		$this->consumeSingleLineComment();
442		$get = "\n";
443		break;
444		case '*':
445		$this->consumeMultipleLineComment();
446		$get = ' ';
447		break;
448		}
449		}
450		return $get;
451		}
452		}
453
454		class JSMin_UnterminatedStringException extends Exception {}
455		class JSMin_UnterminatedCommentException extends Exception {}
456		class JSMin_UnterminatedRegExpException extends Exception {}
457

gctools-outilsgc / gcconnex

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