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JavaScriptPacker.php
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1 <?php
2 /* 9 April 2008. version 1.1
3 *
4 * This is the php version of the Dean Edwards JavaScript's Packer,
5 * Based on :
6 *
7 * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards
8 * a multi-pattern parser.
9 * KNOWN BUG: erroneous behavior when using escapeChar with a replacement
10 * value that is a function
11 *
12 * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards
13 *
14 * License: http://creativecommons.org/licenses/LGPL/2.1/
15 *
16 * Ported to PHP by Nicolas Martin.
17 *
18 * ----------------------------------------------------------------------
19 * changelog:
20 * 1.1 : correct a bug, '\0' packed then unpacked becomes '\'.
21 * ----------------------------------------------------------------------
22 *
23 * examples of usage :
24 * $myPacker = new JavaScriptPacker($script, 62, true, false);
25 * $packed = $myPacker->pack();
26 *
27 * or
28 *
29 * $myPacker = new JavaScriptPacker($script, 'Normal', true, false);
30 * $packed = $myPacker->pack();
31 *
32 * or (default values)
33 *
34 * $myPacker = new JavaScriptPacker($script);
35 * $packed = $myPacker->pack();
36 *
37 *
38 * params of the constructor :
39 * $script: the JavaScript to pack, string.
40 * $encoding: level of encoding, int or string :
41 * 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'.
42 * default: 62.
43 * $fastDecode: include the fast decoder in the packed result, boolean.
44 * default : true.
45 * $specialChars: if you are flagged your private and local variables
46 * in the script, boolean.
47 * default: false.
48 *
49 * The pack() method return the compressed JavasScript, as a string.
50 *
51 * see http://dean.edwards.name/packer/usage/ for more information.
52 *
53 * Notes :
54 * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3
55 *
56 * # The packed result may be different than with the Dean Edwards
57 * version, but with the same length. The reason is that the PHP
58 * function usort to sort array don't necessarily preserve the
59 * original order of two equal member. The Javascript sort function
60 * in fact preserve this order (but that's not require by the
61 * ECMAScript standard). So the encoded keywords order can be
62 * different in the two results.
63 *
64 * # Be careful with the 'High ASCII' Level encoding if you use
65 * UTF-8 in your files...
66 */
67
68
69 class JavaScriptPacker {
70 // constants
71 const IGNORE = '$1';
72
73 // validate parameters
74 private $_script = '';
75 private $_encoding = 62;
76 private $_fastDecode = true;
77 private $_specialChars = false;
78
79 private $LITERAL_ENCODING = array(
80 'None' => 0,
81 'Numeric' => 10,
82 'Normal' => 62,
83 'High ASCII' => 95
84 );
85
86 public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false)
87 {
88 $this->_script = $_script . "\n";
89 if (array_key_exists($_encoding, $this->LITERAL_ENCODING))
90 $_encoding = $this->LITERAL_ENCODING[$_encoding];
91 $this->_encoding = min((int)$_encoding, 95);
92 $this->_fastDecode = $_fastDecode;
93 $this->_specialChars = $_specialChars;
94 }
95
96 public function pack() {
97 $this->_addParser('_basicCompression');
98 if ($this->_specialChars)
99 $this->_addParser('_encodeSpecialChars');
100 if ($this->_encoding)
101 $this->_addParser('_encodeKeywords');
102
103 // go!
104 return $this->_pack($this->_script);
105 }
106
107 // apply all parsing routines
108 private function _pack($script) {
109 for ($i = 0; isset($this->_parsers[$i]); $i++) {
110 $script = call_user_func(array(&$this,$this->_parsers[$i]), $script);
111 }
112 return $script;
113 }
114
115 // keep a list of parsing functions, they'll be executed all at once
116 private $_parsers = array();
117 private function _addParser($parser) {
118 $this->_parsers[] = $parser;
119 }
120
121 // zero encoding - just removal of white space and comments
122 private function _basicCompression($script) {
123 $parser = new ParseMaster();
124 // make safe
125 $parser->escapeChar = '\\';
126 // protect strings
127 $parser->add('/\'[^\'\\n\\r]*\'/', self::IGNORE);
128 $parser->add('/"[^"\\n\\r]*"/', self::IGNORE);
129 // remove comments
130 $parser->add('/\\/\\/[^\\n\\r]*[\\n\\r]/', ' ');
131 $parser->add('/\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\//', ' ');
132 // protect regular expressions
133 $parser->add('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$2'); // IGNORE
134 $parser->add('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', self::IGNORE);
135 // remove: ;;; doSomething();
136 if ($this->_specialChars) $parser->add('/;;;[^\\n\\r]+[\\n\\r]/');
137 // remove redundant semi-colons
138 $parser->add('/\\(;;\\)/', self::IGNORE); // protect for (;;) loops
139 $parser->add('/;+\\s*([};])/', '$2');
140 // apply the above
141 $script = $parser->exec($script);
142
143 // remove white-space
144 $parser->add('/(\\b|\\x24)\\s+(\\b|\\x24)/', '$2 $3');
145 $parser->add('/([+\\-])\\s+([+\\-])/', '$2 $3');
146 $parser->add('/\\s+/', '');
147 // done
148 return $parser->exec($script);
149 }
150
151 private function _encodeSpecialChars($script) {
152 $parser = new ParseMaster();
153 // replace: $name -> n, $$name -> na
154 $parser->add('/((\\x24+)([a-zA-Z$_]+))(\\d*)/',
155 array('fn' => '_replace_name')
156 );
157 // replace: _name -> _0, double-underscore (__name) is ignored
158 $regexp = '/\\b_[A-Za-z\\d]\\w*/';
159 // build the word list
160 $keywords = $this->_analyze($script, $regexp, '_encodePrivate');
161 // quick ref
162 $encoded = $keywords['encoded'];
163
164 $parser->add($regexp,
165 array(
166 'fn' => '_replace_encoded',
167 'data' => $encoded
168 )
169 );
170 return $parser->exec($script);
171 }
172
173 private function _encodeKeywords($script) {
174 // escape high-ascii values already in the script (i.e. in strings)
175 if ($this->_encoding > 62)
176 $script = $this->_escape95($script);
177 // create the parser
178 $parser = new ParseMaster();
179 $encode = $this->_getEncoder($this->_encoding);
180 // for high-ascii, don't encode single character low-ascii
181 $regexp = ($this->_encoding > 62) ? '/\\w\\w+/' : '/\\w+/';
182 // build the word list
183 $keywords = $this->_analyze($script, $regexp, $encode);
184 $encoded = $keywords['encoded'];
185
186 // encode
187 $parser->add($regexp,
188 array(
189 'fn' => '_replace_encoded',
190 'data' => $encoded
191 )
192 );
193 if (empty($script)) return $script;
194 else {
195 //$res = $parser->exec($script);
196 //$res = $this->_bootStrap($res, $keywords);
197 //return $res;
198 return $this->_bootStrap($parser->exec($script), $keywords);
199 }
200 }
201
202 private function _analyze($script, $regexp, $encode) {
203 // analyse
204 // retreive all words in the script
205 $all = array();
206 preg_match_all($regexp, $script, $all);
207 $_sorted = array(); // list of words sorted by frequency
208 $_encoded = array(); // dictionary of word->encoding
209 $_protected = array(); // instances of "protected" words
210 $all = $all[0]; // simulate the javascript comportement of global match
211 if (!empty($all)) {
212 $unsorted = array(); // same list, not sorted
213 $protected = array(); // "protected" words (dictionary of word->"word")
214 $value = array(); // dictionary of charCode->encoding (eg. 256->ff)
215 $this->_count = array(); // word->count
216 $i = count($all); $j = 0; //$word = null;
217 // count the occurrences - used for sorting later
218 do {
219 --$i;
220 $word = '$' . $all[$i];
221 if (!isset($this->_count[$word])) {
222 $this->_count[$word] = 0;
223 $unsorted[$j] = $word;
224 // make a dictionary of all of the protected words in this script
225 // these are words that might be mistaken for encoding
226 //if (is_string($encode) && method_exists($this, $encode))
227 $values[$j] = call_user_func(array(&$this, $encode), $j);
228 $protected['$' . $values[$j]] = $j++;
229 }
230 // increment the word counter
231 $this->_count[$word]++;
232 } while ($i > 0);
233 // prepare to sort the word list, first we must protect
234 // words that are also used as codes. we assign them a code
235 // equivalent to the word itself.
236 // e.g. if "do" falls within our encoding range
237 // then we store keywords["do"] = "do";
238 // this avoids problems when decoding
239 $i = count($unsorted);
240 do {
241 $word = $unsorted[--$i];
242 if (isset($protected[$word]) ) {
243 $_sorted[$protected[$word]] = substr($word, 1);
244 $_protected[$protected[$word]] = true;
245 $this->_count[$word] = 0;
246 }
247 } while ($i);
248
249 // sort the words by frequency
250 // Note: the javascript and php version of sort can be different :
251 // in php manual, usort :
252 // " If two members compare as equal,
253 // their order in the sorted array is undefined."
254 // so the final packed script is different of the Dean's javascript version
255 // but equivalent.
256 // the ECMAscript standard does not guarantee this behaviour,
257 // and thus not all browsers (e.g. Mozilla versions dating back to at
258 // least 2003) respect this.
259 usort($unsorted, array(&$this, '_sortWords'));
260 $j = 0;
261 // because there are "protected" words in the list
262 // we must add the sorted words around them
263 do {
264 if (!isset($_sorted[$i]))
265 $_sorted[$i] = substr($unsorted[$j++], 1);
266 $_encoded[$_sorted[$i]] = $values[$i];
267 } while (++$i < count($unsorted));
268 }
269 return array(
270 'sorted' => $_sorted,
271 'encoded' => $_encoded,
272 'protected' => $_protected);
273 }
274
275 private $_count = array();
276 private function _sortWords($match1, $match2) {
277 return $this->_count[$match2] - $this->_count[$match1];
278 }
279
280 // build the boot function used for loading and decoding
281 private function _bootStrap($packed, $keywords) {
282 $ENCODE = $this->_safeRegExp('$encode\\($count\\)');
283
284 // $packed: the packed script
285 $packed = "'" . $this->_escape($packed) . "'";
286
287 // $ascii: base for encoding
288 $ascii = min(count($keywords['sorted']), $this->_encoding);
289 if ($ascii == 0) $ascii = 1;
290
291 // $count: number of words contained in the script
292 $count = count($keywords['sorted']);
293
294 // $keywords: list of words contained in the script
295 foreach ($keywords['protected'] as $i=>$value) {
296 $keywords['sorted'][$i] = '';
297 }
298 // convert from a string to an array
299 ksort($keywords['sorted']);
300 $keywords = "'" . implode('|',$keywords['sorted']) . "'.split('|')";
301
302 $encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii);
303 $encode = $this->_getJSFunction($encode);
304 $encode = preg_replace('/_encoding/','$ascii', $encode);
305 $encode = preg_replace('/arguments\\.callee/','$encode', $encode);
306 $inline = '\\$count' . ($ascii > 10 ? '.toString(\\$ascii)' : '');
307
308 // $decode: code snippet to speed up decoding
309 if ($this->_fastDecode) {
310 // create the decoder
311 $decode = $this->_getJSFunction('_decodeBody');
312 if ($this->_encoding > 62)
313 $decode = preg_replace('/\\\\w/', '[\\xa1-\\xff]', $decode);
314 // perform the encoding inline for lower ascii values
315 elseif ($ascii < 36)
316 $decode = preg_replace($ENCODE, $inline, $decode);
317 // special case: when $count==0 there are no keywords. I want to keep
318 // the basic shape of the unpacking funcion so i'll frig the code...
319 if ($count == 0)
320 $decode = preg_replace($this->_safeRegExp('($count)\\s*=\\s*1'), '$1=0', $decode, 1);
321 }
322
323 // boot function
324 $unpack = $this->_getJSFunction('_unpack');
325 if ($this->_fastDecode) {
326 // insert the decoder
327 $this->buffer = $decode;
328 $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastDecode'), $unpack, 1);
329 }
330 $unpack = preg_replace('/"/', "'", $unpack);
331 if ($this->_encoding > 62) { // high-ascii
332 // get rid of the word-boundaries for regexp matches
333 $unpack = preg_replace('/\'\\\\\\\\b\'\s*\\+|\\+\s*\'\\\\\\\\b\'/', '', $unpack);
334 }
335 if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) {
336 // insert the encode function
337 $this->buffer = $encode;
338 $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastEncode'), $unpack, 1);
339 } else {
340 // perform the encoding inline
341 $unpack = preg_replace($ENCODE, $inline, $unpack);
342 }
343 // pack the boot function too
344 $unpackPacker = new JavaScriptPacker($unpack, 0, false, true);
345 $unpack = $unpackPacker->pack();
346
347 // arguments
348 $params = array($packed, $ascii, $count, $keywords);
349 if ($this->_fastDecode) {
350 $params[] = 0;
351 $params[] = '{}';
352 }
353 $params = implode(',', $params);
354
355 // the whole thing
356 return 'eval(' . $unpack . '(' . $params . "))\n";
357 }
358
359 private $buffer;
360 private function _insertFastDecode($match) {
361 return '{' . $this->buffer . ';';
362 }
363 private function _insertFastEncode($match) {
364 return '{$encode=' . $this->buffer . ';';
365 }
366
367 // mmm.. ..which one do i need ??
368 private function _getEncoder($ascii) {
369 return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ?
370 '_encode95' : '_encode62' : '_encode36' : '_encode10';
371 }
372
373 // zero encoding
374 // characters: 0123456789
375 private function _encode10($charCode) {
376 return $charCode;
377 }
378
379 // inherent base36 support
380 // characters: 0123456789abcdefghijklmnopqrstuvwxyz
381 private function _encode36($charCode) {
382 return base_convert($charCode, 10, 36);
383 }
384
385 // hitch a ride on base36 and add the upper case alpha characters
386 // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
387 private function _encode62($charCode) {
388 $res = '';
389 if ($charCode >= $this->_encoding) {
390 $res = $this->_encode62((int)($charCode / $this->_encoding));
391 }
392 $charCode = $charCode % $this->_encoding;
393
394 if ($charCode > 35)
395 return $res . chr($charCode + 29);
396 else
397 return $res . base_convert($charCode, 10, 36);
398 }
399
400 // use high-ascii values
401 // characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ
402 private function _encode95($charCode) {
403 $res = '';
404 if ($charCode >= $this->_encoding)
405 $res = $this->_encode95($charCode / $this->_encoding);
406
407 return $res . chr(($charCode % $this->_encoding) + 161);
408 }
409
410 private function _safeRegExp($string) {
411 return '/'.preg_replace('/\$/', '\\\$', $string).'/';
412 }
413
414 private function _encodePrivate($charCode) {
415 return "_" . $charCode;
416 }
417
418 // protect characters used by the parser
419 private function _escape($script) {
420 return preg_replace('/([\\\\\'])/', '\\\$1', $script);
421 }
422
423 // protect high-ascii characters already in the script
424 private function _escape95($script) {
425 return preg_replace_callback(
426 '/[\\xa1-\\xff]/',
427 array(&$this, '_escape95Bis'),
428 $script
429 );
430 }
431 private function _escape95Bis($match) {
432 return '\x'.((string)dechex(ord($match)));
433 }
434
435
436 private function _getJSFunction($aName) {
437 if (defined('self::JSFUNCTION'.$aName))
438 return constant('self::JSFUNCTION'.$aName);
439 else
440 return '';
441 }
442
443 // JavaScript Functions used.
444 // Note : In Dean's version, these functions are converted
445 // with 'String(aFunctionName);'.
446 // This internal conversion complete the original code, ex :
447 // 'while (aBool) anAction();' is converted to
448 // 'while (aBool) { anAction(); }'.
449 // The JavaScript functions below are corrected.
450
451 // unpacking function - this is the boot strap function
452 // data extracted from this packing routine is passed to
453 // this function when decoded in the target
454 // NOTE ! : without the ';' final.
455 const JSFUNCTION_unpack =
456
457 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
458 while ($count--) {
459 if ($keywords[$count]) {
460 $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]);
461 }
462 }
463 return $packed;
464 }';
465 /*
466 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
467 while ($count--)
468 if ($keywords[$count])
469 $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]);
470 return $packed;
471 }';
472 */
473
474 // code-snippet inserted into the unpacker to speed up decoding
475 const JSFUNCTION_decodeBody =
476 //_decode = function() {
477 // does the browser support String.replace where the
478 // replacement value is a function?
479
480 ' if (!\'\'.replace(/^/, String)) {
481 // decode all the values we need
482 while ($count--) {
483 $decode[$encode($count)] = $keywords[$count] || $encode($count);
484 }
485 // global replacement function
486 $keywords = [function ($encoded) {return $decode[$encoded]}];
487 // generic match
488 $encode = function () {return \'\\\\w+\'};
489 // reset the loop counter - we are now doing a global replace
490 $count = 1;
491 }
492 ';
493 //};
494 /*
495 ' if (!\'\'.replace(/^/, String)) {
496 // decode all the values we need
497 while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);
498 // global replacement function
499 $keywords = [function ($encoded) {return $decode[$encoded]}];
500 // generic match
501 $encode = function () {return\'\\\\w+\'};
502 // reset the loop counter - we are now doing a global replace
503 $count = 1;
504 }';
505 */
506
507 // zero encoding
508 // characters: 0123456789
509 const JSFUNCTION_encode10 =
510 'function($charCode) {
511 return $charCode;
512 }';//;';
513
514 // inherent base36 support
515 // characters: 0123456789abcdefghijklmnopqrstuvwxyz
516 const JSFUNCTION_encode36 =
517 'function($charCode) {
518 return $charCode.toString(36);
519 }';//;';
520
521 // hitch a ride on base36 and add the upper case alpha characters
522 // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
523 const JSFUNCTION_encode62 =
524 'function($charCode) {
525 return ($charCode < _encoding ? \'\' : arguments.callee(parseInt($charCode / _encoding))) +
526 (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));
527 }';
528
529 // use high-ascii values
530 // characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ
531 const JSFUNCTION_encode95 =
532 'function($charCode) {
533 return ($charCode < _encoding ? \'\' : arguments.callee($charCode / _encoding)) +
534 String.fromCharCode($charCode % _encoding + 161);
535 }';
536
537 }
538
539
540 class ParseMaster {
541 public $ignoreCase = false;
542 public $escapeChar = '';
543
544 // constants
545 const EXPRESSION = 0;
546 const REPLACEMENT = 1;
547 const LENGTH = 2;
548
549 // used to determine nesting levels
550 private $GROUPS = '/\\(/';//g
551 private $SUB_REPLACE = '/\\$\\d/';
552 private $INDEXED = '/^\\$\\d+$/';
553 private $TRIM = '/([\'"])\\1\\.(.*)\\.\\1\\1$/';
554 private $ESCAPE = '/\\\./';//g
555 private $QUOTE = '/\'/';
556 private $DELETED = '/\\x01[^\\x01]*\\x01/';//g
557
558 public function add($expression, $replacement = '') {
559 // count the number of sub-expressions
560 // - add one because each pattern is itself a sub-expression
561 $length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string)$expression), $out);
562
563 // treat only strings $replacement
564 if (is_string($replacement)) {
565 // does the pattern deal with sub-expressions?
566 if (preg_match($this->SUB_REPLACE, $replacement)) {
567 // a simple lookup? (e.g. "$2")
568 if (preg_match($this->INDEXED, $replacement)) {
569 // store the index (used for fast retrieval of matched strings)
570 $replacement = (int)(substr($replacement, 1)) - 1;
571 } else { // a complicated lookup (e.g. "Hello $2 $1")
572 // build a function to do the lookup
573 $quote = preg_match($this->QUOTE, $this->_internalEscape($replacement))
574 ? '"' : "'";
575 $replacement = array(
576 'fn' => '_backReferences',
577 'data' => array(
578 'replacement' => $replacement,
579 'length' => $length,
580 'quote' => $quote
581 )
582 );
583 }
584 }
585 }
586 // pass the modified arguments
587 if (!empty($expression)) $this->_add($expression, $replacement, $length);
588 else $this->_add('/^$/', $replacement, $length);
589 }
590
591 public function exec($string) {
592 // execute the global replacement
593 $this->_escaped = array();
594
595 // simulate the _patterns.toSTring of Dean
596 $regexp = '/';
597 foreach ($this->_patterns as $reg) {
598 $regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|';
599 }
600 $regexp = substr($regexp, 0, -1) . '/';
601 $regexp .= ($this->ignoreCase) ? 'i' : '';
602
603 $string = $this->_escape($string, $this->escapeChar);
604 $string = preg_replace_callback(
605 $regexp,
606 array(
607 &$this,
608 '_replacement'
609 ),
610 $string
611 );
612 $string = $this->_unescape($string, $this->escapeChar);
613
614 return preg_replace($this->DELETED, '', $string);
615 }
616
617 public function reset() {
618 // clear the patterns collection so that this object may be re-used
619 $this->_patterns = array();
620 }
621
622 // private
623 private $_escaped = array(); // escaped characters
624 private $_patterns = array(); // patterns stored by index
625
626 // create and add a new pattern to the patterns collection
627 private function _add() {
628 $arguments = func_get_args();
629 $this->_patterns[] = $arguments;
630 }
631
632 // this is the global replace function (it's quite complicated)
633 private function _replacement($arguments) {
634 if (empty($arguments)) return '';
635
636 $i = 1; $j = 0;
637 // loop through the patterns
638 while (isset($this->_patterns[$j])) {
639 $pattern = $this->_patterns[$j++];
640 // do we have a result?
641 if (isset($arguments[$i]) && ($arguments[$i] != '')) {
642 $replacement = $pattern[self::REPLACEMENT];
643
644 if (is_array($replacement) && isset($replacement['fn'])) {
645
646 if (isset($replacement['data'])) $this->buffer = $replacement['data'];
647 return call_user_func(array(&$this, $replacement['fn']), $arguments, $i);
648
649 } elseif (is_int($replacement)) {
650 return $arguments[$replacement + $i];
651
652 }
653 $delete = ($this->escapeChar == '' ||
654 strpos($arguments[$i], $this->escapeChar) === false)
655 ? '' : "\x01" . $arguments[$i] . "\x01";
656 return $delete . $replacement;
657
658 // skip over references to sub-expressions
659 } else {
660 $i += $pattern[self::LENGTH];
661 }
662 }
663 }
664
665 private function _backReferences($match, $offset) {
666 $replacement = $this->buffer['replacement'];
667 $quote = $this->buffer['quote'];
668 $i = $this->buffer['length'];
669 while ($i) {
670 $replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement);
671 }
672 return $replacement;
673 }
674
675 private function _replace_name($match, $offset){
676 $length = strlen($match[$offset + 2]);
677 $start = $length - max($length - strlen($match[$offset + 3]), 0);
678 return substr($match[$offset + 1], $start, $length) . $match[$offset + 4];
679 }
680
681 private function _replace_encoded($match, $offset) {
682 return $this->buffer[$match[$offset]];
683 }
684
685
686 // php : we cannot pass additional data to preg_replace_callback,
687 // and we cannot use &$this in create_function, so let's go to lower level
688 private $buffer;
689
690 // encode escaped characters
691 private function _escape($string, $escapeChar) {
692 if ($escapeChar) {
693 $this->buffer = $escapeChar;
694 return preg_replace_callback(
695 '/\\' . $escapeChar . '(.)' .'/',
696 array(&$this, '_escapeBis'),
697 $string
698 );
699
700 } else {
701 return $string;
702 }
703 }
704 private function _escapeBis($match) {
705 $this->_escaped[] = $match[1];
706 return $this->buffer;
707 }
708
709 // decode escaped characters
710 private function _unescape($string, $escapeChar) {
711 if ($escapeChar) {
712 $regexp = '/'.'\\'.$escapeChar.'/';
713 $this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0);
714 return preg_replace_callback
715 (
716 $regexp,
717 array(&$this, '_unescapeBis'),
718 $string
719 );
720
721 } else {
722 return $string;
723 }
724 }
725 private function _unescapeBis() {
726 if (isset($this->_escaped[$this->buffer['i']])
727 && $this->_escaped[$this->buffer['i']] != '')
728 {
729 $temp = $this->_escaped[$this->buffer['i']];
730 } else {
731 $temp = '';
732 }
733 $this->buffer['i']++;
734 return $this->buffer['escapeChar'] . $temp;
735 }
736
737 private function _internalEscape($string) {
738 return preg_replace($this->ESCAPE, '', $string);
739 }
740 }
741 ?>
ParseMaster\reset
reset()
Definition: JavaScriptPacker.php:617
ParseMaster\add
add($expression, $replacement= '')
Definition: JavaScriptPacker.php:558
JavaScriptPacker\__construct
__construct($_script, $_encoding=62, $_fastDecode=true, $_specialChars=false)
Definition: JavaScriptPacker.php:86
JavaScriptPacker\pack
pack()
Definition: JavaScriptPacker.php:96
JavaScriptPacker\JSFUNCTION_encode95
const JSFUNCTION_encode95
Definition: JavaScriptPacker.php:531
JavaScriptPacker\JSFUNCTION_encode10
const JSFUNCTION_encode10
Definition: JavaScriptPacker.php:509
ParseMaster\exec
exec($string)
Definition: JavaScriptPacker.php:591
JavaScriptPacker\JSFUNCTION_encode62
const JSFUNCTION_encode62
Definition: JavaScriptPacker.php:523
JavaScriptPacker\IGNORE
const IGNORE
Definition: JavaScriptPacker.php:71
JavaScriptPacker\JSFUNCTION_unpack
const JSFUNCTION_unpack
Definition: JavaScriptPacker.php:455
ParseMaster
Definition: JavaScriptPacker.php:540
JavaScriptPacker\JSFUNCTION_encode36
const JSFUNCTION_encode36
Definition: JavaScriptPacker.php:516
JavaScriptPacker\JSFUNCTION_decodeBody
const JSFUNCTION_decodeBody
Definition: JavaScriptPacker.php:475
JavaScriptPacker
Definition: JavaScriptPacker.php:69