| 0,0 → 1,788 |
|---|
| <?php |
| /* 25 October 2011. version 1.1-FF4 |
| * |
| * This is the php version of the Dean Edwards JavaScript's Packer, |
| * Based on : |
| * |
| * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards |
| * a multi-pattern parser. |
| * KNOWN BUG: erroneous behavior when using escapeChar with a replacement |
| * value that is a function |
| * |
| * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards |
| * |
| * License: http://creativecommons.org/licenses/LGPL/2.1/ |
| * |
| * Ported to PHP by Nicolas Martin. |
| * |
| * ---------------------------------------------------------------------- |
| * changelog: |
| * 1.1 : correct a bug, '\0' packed then unpacked becomes '\'. |
| * 1.1-FF4 : Firefox 4 fix, Copyright 2011, Mieczyslaw Nalewaj |
| * ---------------------------------------------------------------------- |
| * |
| * examples of usage : |
| * $myPacker = new JavaScriptPacker($script, 62, true, false); |
| * $packed = $myPacker->pack(); |
| * |
| * or |
| * |
| * $myPacker = new JavaScriptPacker($script, 'Normal', true, false); |
| * $packed = $myPacker->pack(); |
| * |
| * or (default values) |
| * |
| * $myPacker = new JavaScriptPacker($script); |
| * $packed = $myPacker->pack(); |
| * |
| * |
| * params of the constructor : |
| * $script: the JavaScript to pack, string. |
| * $encoding: level of encoding, int or string : |
| * 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'. |
| * default: 62. |
| * $fastDecode: include the fast decoder in the packed result, boolean. |
| * default : true. |
| * $specialChars: if you are flagged your private and local variables |
| * in the script, boolean. |
| * default: false. |
| * |
| * The pack() method return the compressed JavasScript, as a string. |
| * |
| * see http://dean.edwards.name/packer/usage/ for more information. |
| * |
| * Notes : |
| * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3 |
| * |
| * # The packed result may be different than with the Dean Edwards |
| * version, but with the same length. The reason is that the PHP |
| * function usort to sort array don't necessarily preserve the |
| * original order of two equal member. The Javascript sort function |
| * in fact preserve this order (but that's not require by the |
| * ECMAScript standard). So the encoded keywords order can be |
| * different in the two results. |
| * |
| * # Be careful with the 'High ASCII' Level encoding if you use |
| * UTF-8 in your files... |
| */ |
| |
| |
| class JavaScriptPacker |
| { |
| // constants |
| const IGNORE = '$1'; |
| |
| // validate parameters |
| private $_script = ''; |
| private $_encoding = 62; |
| private $_fastDecode = true; |
| private $_specialChars = false; |
| |
| private $LITERAL_ENCODING = array( |
| 'None' => 0, |
| 'Numeric' => 10, |
| 'Normal' => 62, |
| 'High ASCII' => 95 |
| ); |
| |
| public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false) |
| { |
| $this->_script = $_script . "\n"; |
| if (array_key_exists($_encoding, $this->LITERAL_ENCODING)) |
| $_encoding = $this->LITERAL_ENCODING[$_encoding]; |
| $this->_encoding = min((int) $_encoding, 95); |
| $this->_fastDecode = $_fastDecode; |
| $this->_specialChars = $_specialChars; |
| } |
| |
| public function pack() |
| { |
| $this->_addParser('_basicCompression'); |
| if ($this->_specialChars) |
| $this->_addParser('_encodeSpecialChars'); |
| if ($this->_encoding) |
| $this->_addParser('_encodeKeywords'); |
| |
| // go! |
| return $this->_pack($this->_script); |
| } |
| |
| // apply all parsing routines |
| private function _pack($script) |
| { |
| for ($i = 0; isset($this->_parsers[$i]); $i++) { |
| $script = call_user_func(array(&$this, $this->_parsers[$i]), $script); |
| } |
| |
| return $script; |
| } |
| |
| // keep a list of parsing functions, they'll be executed all at once |
| private $_parsers = array(); |
| private function _addParser($parser) |
| { |
| $this->_parsers[] = $parser; |
| } |
| |
| // zero encoding - just removal of white space and comments |
| private function _basicCompression($script) |
| { |
| $parser = new ParseMaster(); |
| // make safe |
| $parser->escapeChar = '\\'; |
| // protect strings |
| $parser->add('/\'[^\'\\n\\r]*\'/', self::IGNORE); |
| $parser->add('/"[^"\\n\\r]*"/', self::IGNORE); |
| // remove comments |
| $parser->add('/\\/\\/[^\\n\\r]*[\\n\\r]/', ' '); |
| $parser->add('/\\/\\*[^*]*\\*+([^\\/][^*]*\\*+)*\\//', ' '); |
| // protect regular expressions |
| $parser->add('/\\s+(\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?)/', '$2'); // IGNORE |
| $parser->add('/[^\\w\\x24\\/\'"*)\\?:]\\/[^\\/\\n\\r\\*][^\\/\\n\\r]*\\/g?i?/', self::IGNORE); |
| // remove: ;;; doSomething(); |
| if ($this->_specialChars) $parser->add('/;;;[^\\n\\r]+[\\n\\r]/'); |
| // remove redundant semi-colons |
| $parser->add('/\\(;;\\)/', self::IGNORE); // protect for (;;) loops |
| $parser->add('/;+\\s*([};])/', '$2'); |
| // apply the above |
| $script = $parser->exec($script); |
| |
| // remove white-space |
| $parser->add('/(\\b|\\x24)\\s+(\\b|\\x24)/', '$2 $3'); |
| $parser->add('/([+\\-])\\s+([+\\-])/', '$2 $3'); |
| $parser->add('/\\s+/', ''); |
| // done |
| return $parser->exec($script); |
| } |
| |
| private function _encodeSpecialChars($script) |
| { |
| $parser = new ParseMaster(); |
| // replace: $name -> n, $$name -> na |
| $parser->add('/((\\x24+)([a-zA-Z$_]+))(\\d*)/', |
| array('fn' => '_replace_name') |
| ); |
| // replace: _name -> _0, double-underscore (__name) is ignored |
| $regexp = '/\\b_[A-Za-z\\d]\\w*/'; |
| // build the word list |
| $keywords = $this->_analyze($script, $regexp, '_encodePrivate'); |
| // quick ref |
| $encoded = $keywords['encoded']; |
| |
| $parser->add($regexp, |
| array( |
| 'fn' => '_replace_encoded', |
| 'data' => $encoded |
| ) |
| ); |
| |
| return $parser->exec($script); |
| } |
| |
| private function _encodeKeywords($script) |
| { |
| // escape high-ascii values already in the script (i.e. in strings) |
| if ($this->_encoding > 62) |
| $script = $this->_escape95($script); |
| // create the parser |
| $parser = new ParseMaster(); |
| $encode = $this->_getEncoder($this->_encoding); |
| // for high-ascii, don't encode single character low-ascii |
| $regexp = ($this->_encoding > 62) ? '/\\w\\w+/' : '/\\w+/'; |
| // build the word list |
| $keywords = $this->_analyze($script, $regexp, $encode); |
| $encoded = $keywords['encoded']; |
| |
| // encode |
| $parser->add($regexp, |
| array( |
| 'fn' => '_replace_encoded', |
| 'data' => $encoded |
| ) |
| ); |
| if (empty($script)) return $script; |
| else { |
| //$res = $parser->exec($script); |
| //$res = $this->_bootStrap($res, $keywords); |
| //return $res; |
| return $this->_bootStrap($parser->exec($script), $keywords); |
| } |
| } |
| |
| private function _analyze($script, $regexp, $encode) |
| { |
| // analyse |
| // retreive all words in the script |
| $all = array(); |
| preg_match_all($regexp, $script, $all); |
| $_sorted = array(); // list of words sorted by frequency |
| $_encoded = array(); // dictionary of word->encoding |
| $_protected = array(); // instances of "protected" words |
| $all = $all[0]; // simulate the javascript comportement of global match |
| if (!empty($all)) { |
| $unsorted = array(); // same list, not sorted |
| $protected = array(); // "protected" words (dictionary of word->"word") |
| $value = array(); // dictionary of charCode->encoding (eg. 256->ff) |
| $this->_count = array(); // word->count |
| $i = count($all); $j = 0; //$word = null; |
| // count the occurrences - used for sorting later |
| do { |
| --$i; |
| $word = '$' . $all[$i]; |
| if (!isset($this->_count[$word])) { |
| $this->_count[$word] = 0; |
| $unsorted[$j] = $word; |
| // make a dictionary of all of the protected words in this script |
| // these are words that might be mistaken for encoding |
| //if (is_string($encode) && method_exists($this, $encode)) |
| $values[$j] = call_user_func(array(&$this, $encode), $j); |
| $protected['$' . $values[$j]] = $j++; |
| } |
| // increment the word counter |
| $this->_count[$word]++; |
| } while ($i > 0); |
| // prepare to sort the word list, first we must protect |
| // words that are also used as codes. we assign them a code |
| // equivalent to the word itself. |
| // e.g. if "do" falls within our encoding range |
| // then we store keywords["do"] = "do"; |
| // this avoids problems when decoding |
| $i = count($unsorted); |
| do { |
| $word = $unsorted[--$i]; |
| if (isset($protected[$word]) /*!= null*/) { |
| $_sorted[$protected[$word]] = substr($word, 1); |
| $_protected[$protected[$word]] = true; |
| $this->_count[$word] = 0; |
| } |
| } while ($i); |
| |
| // sort the words by frequency |
| // Note: the javascript and php version of sort can be different : |
| // in php manual, usort : |
| // " If two members compare as equal, |
| // their order in the sorted array is undefined." |
| // so the final packed script is different of the Dean's javascript version |
| // but equivalent. |
| // the ECMAscript standard does not guarantee this behaviour, |
| // and thus not all browsers (e.g. Mozilla versions dating back to at |
| // least 2003) respect this. |
| usort($unsorted, array(&$this, '_sortWords')); |
| $j = 0; |
| // because there are "protected" words in the list |
| // we must add the sorted words around them |
| do { |
| if (!isset($_sorted[$i])) |
| $_sorted[$i] = substr($unsorted[$j++], 1); |
| $_encoded[$_sorted[$i]] = $values[$i]; |
| } while (++$i < count($unsorted)); |
| } |
| |
| return array( |
| 'sorted' => $_sorted, |
| 'encoded' => $_encoded, |
| 'protected' => $_protected); |
| } |
| |
| private $_count = array(); |
| private function _sortWords($match1, $match2) |
| { |
| return $this->_count[$match2] - $this->_count[$match1]; |
| } |
| |
| // build the boot function used for loading and decoding |
| private function _bootStrap($packed, $keywords) |
| { |
| $ENCODE = $this->_safeRegExp('$encode\\($count\\)'); |
| |
| // $packed: the packed script |
| $packed = "'" . $this->_escape($packed) . "'"; |
| |
| // $ascii: base for encoding |
| $ascii = min(count($keywords['sorted']), $this->_encoding); |
| if ($ascii == 0) $ascii = 1; |
| |
| // $count: number of words contained in the script |
| $count = count($keywords['sorted']); |
| |
| // $keywords: list of words contained in the script |
| foreach ($keywords['protected'] as $i=>$value) { |
| $keywords['sorted'][$i] = ''; |
| } |
| // convert from a string to an array |
| ksort($keywords['sorted']); |
| $keywords = "'" . implode('|', $keywords['sorted']) . "'.split('|')"; |
| |
| $encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii); |
| $encode = $this->_getJSFunction($encode); |
| $encode = preg_replace('/_encoding/', '$ascii', $encode); |
| $encode = preg_replace('/arguments\\.callee/', '$encode', $encode); |
| $inline = '\\$count' . ($ascii > 10 ? '.toString(\\$ascii)' : ''); |
| |
| // $decode: code snippet to speed up decoding |
| if ($this->_fastDecode) { |
| // create the decoder |
| $decode = $this->_getJSFunction('_decodeBody'); |
| if ($this->_encoding > 62) |
| $decode = preg_replace('/\\\\w/', '[\\xa1-\\xff]', $decode); |
| // perform the encoding inline for lower ascii values |
| elseif ($ascii < 36) |
| $decode = preg_replace($ENCODE, $inline, $decode); |
| // special case: when $count==0 there are no keywords. I want to keep |
| // the basic shape of the unpacking funcion so i'll frig the code... |
| if ($count == 0) |
| $decode = preg_replace($this->_safeRegExp('($count)\\s*=\\s*1'), '$1=0', $decode, 1); |
| } |
| |
| // boot function |
| $unpack = $this->_getJSFunction('_unpack'); |
| if ($this->_fastDecode) { |
| // insert the decoder |
| $this->buffer = $decode; |
| $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastDecode'), $unpack, 1); |
| } |
| $unpack = preg_replace('/"/', "'", $unpack); |
| if ($this->_encoding > 62) { // high-ascii |
| // get rid of the word-boundaries for regexp matches |
| $unpack = preg_replace('/\'\\\\\\\\b\'\s*\\+|\\+\s*\'\\\\\\\\b\'/', '', $unpack); |
| } |
| if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) { |
| // insert the encode function |
| $this->buffer = $encode; |
| $unpack = preg_replace_callback('/\\{/', array(&$this, '_insertFastEncode'), $unpack, 1); |
| } else { |
| // perform the encoding inline |
| $unpack = preg_replace($ENCODE, $inline, $unpack); |
| } |
| // pack the boot function too |
| $unpackPacker = new JavaScriptPacker($unpack, 0, false, true); |
| $unpack = $unpackPacker->pack(); |
| |
| // arguments |
| $params = array($packed, $ascii, $count, $keywords); |
| if ($this->_fastDecode) { |
| $params[] = 0; |
| $params[] = '{}'; |
| } |
| $params = implode(',', $params); |
| |
| // the whole thing |
| //Firefox 4 fix, old: return 'eval(' . $unpack . '(' . $params . "))\n"; |
| return "(typeof setTimeout=='function'?setTimeout:eval)(" . $unpack . "(" . $params . "));\n"; |
| } |
| |
| private $buffer; |
| private function _insertFastDecode($match) |
| { |
| return '{' . $this->buffer . ';'; |
| } |
| private function _insertFastEncode($match) |
| { |
| return '{$encode=' . $this->buffer . ';'; |
| } |
| |
| // mmm.. ..which one do i need ?? |
| private function _getEncoder($ascii) |
| { |
| return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ? |
| '_encode95' : '_encode62' : '_encode36' : '_encode10'; |
| } |
| |
| // zero encoding |
| // characters: 0123456789 |
| private function _encode10($charCode) |
| { |
| return $charCode; |
| } |
| |
| // inherent base36 support |
| // characters: 0123456789abcdefghijklmnopqrstuvwxyz |
| private function _encode36($charCode) |
| { |
| return base_convert($charCode, 10, 36); |
| } |
| |
| // hitch a ride on base36 and add the upper case alpha characters |
| // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ |
| private function _encode62($charCode) |
| { |
| $res = ''; |
| if ($charCode >= $this->_encoding) { |
| $res = $this->_encode62((int) ($charCode / $this->_encoding)); |
| } |
| $charCode = $charCode % $this->_encoding; |
| |
| if ($charCode > 35) |
| return $res . chr($charCode + 29); |
| else |
| return $res . base_convert($charCode, 10, 36); |
| } |
| |
| // use high-ascii values |
| // characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ |
| private function _encode95($charCode) |
| { |
| $res = ''; |
| if ($charCode >= $this->_encoding) |
| $res = $this->_encode95($charCode / $this->_encoding); |
| |
| return $res . chr(($charCode % $this->_encoding) + 161); |
| } |
| |
| private function _safeRegExp($string) |
| { |
| return '/'.preg_replace('/\$/', '\\\$', $string).'/'; |
| } |
| |
| private function _encodePrivate($charCode) |
| { |
| return "_" . $charCode; |
| } |
| |
| // protect characters used by the parser |
| private function _escape($script) |
| { |
| return preg_replace('/([\\\\\'])/', '\\\$1', $script); |
| } |
| |
| // protect high-ascii characters already in the script |
| private function _escape95($script) |
| { |
| return preg_replace_callback( |
| '/[\\xa1-\\xff]/', |
| array(&$this, '_escape95Bis'), |
| $script |
| ); |
| } |
| private function _escape95Bis($match) |
| { |
| return '\x'.((string) dechex(ord($match))); |
| } |
| |
| private function _getJSFunction($aName) |
| { |
| if (defined('self::JSFUNCTION'.$aName)) |
| return constant('self::JSFUNCTION'.$aName); |
| else |
| return ''; |
| } |
| |
| // JavaScript Functions used. |
| // Note : In Dean's version, these functions are converted |
| // with 'String(aFunctionName);'. |
| // This internal conversion complete the original code, ex : |
| // 'while (aBool) anAction();' is converted to |
| // 'while (aBool) { anAction(); }'. |
| // The JavaScript functions below are corrected. |
| |
| // unpacking function - this is the boot strap function |
| // data extracted from this packing routine is passed to |
| // this function when decoded in the target |
| // NOTE ! : without the ';' final. |
| const JSFUNCTION_unpack = |
| |
| 'function ($packed, $ascii, $count, $keywords, $encode, $decode) { |
| while ($count--) { |
| if ($keywords[$count]) { |
| $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]); |
| } |
| } |
| |
| return $packed; |
| }'; |
| /* |
| 'function ($packed, $ascii, $count, $keywords, $encode, $decode) { |
| while ($count--) |
| if ($keywords[$count]) |
| $packed = $packed.replace(new RegExp(\'\\\\b\' + $encode($count) + \'\\\\b\', \'g\'), $keywords[$count]); |
| |
| return $packed; |
| }'; |
| */ |
| |
| // code-snippet inserted into the unpacker to speed up decoding |
| const JSFUNCTION_decodeBody = |
| //_decode = function () { |
| // does the browser support String.replace where the |
| // replacement value is a function? |
| |
| ' if (!\'\'.replace(/^/, String)) { |
| // decode all the values we need |
| while ($count--) { |
| $decode[$encode($count)] = $keywords[$count] || $encode($count); |
| } |
| // global replacement function |
| $keywords = [function ($encoded) {return $decode[$encoded]}]; |
| // generic match |
| $encode = function () {return \'\\\\w+\'}; |
| // reset the loop counter - we are now doing a global replace |
| $count = 1; |
| } |
| '; |
| //}; |
| /* |
| ' if (!\'\'.replace(/^/, String)) { |
| // decode all the values we need |
| while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count); |
| // global replacement function |
| $keywords = [function ($encoded) {return $decode[$encoded]}]; |
| // generic match |
| $encode = function () {return\'\\\\w+\'}; |
| // reset the loop counter - we are now doing a global replace |
| $count = 1; |
| }'; |
| */ |
| |
| // zero encoding |
| // characters: 0123456789 |
| const JSFUNCTION_encode10 = |
| 'function ($charCode) { |
| return $charCode; |
| }';//;'; |
| |
| // inherent base36 support |
| // characters: 0123456789abcdefghijklmnopqrstuvwxyz |
| const JSFUNCTION_encode36 = |
| 'function ($charCode) { |
| return $charCode.toString(36); |
| }';//;'; |
| |
| // hitch a ride on base36 and add the upper case alpha characters |
| // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ |
| const JSFUNCTION_encode62 = |
| 'function ($charCode) { |
| return ($charCode < _encoding ? \'\' : arguments.callee(parseInt($charCode / _encoding))) + |
| (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36)); |
| }'; |
| |
| // use high-ascii values |
| // characters: ¡¢£¤¥¦§¨©ª«¬®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþ |
| const JSFUNCTION_encode95 = |
| 'function ($charCode) { |
| return ($charCode < _encoding ? \'\' : arguments.callee($charCode / _encoding)) + |
| String.fromCharCode($charCode % _encoding + 161); |
| }'; |
| |
| } |
| |
| class ParseMaster |
| { |
| public $ignoreCase = false; |
| public $escapeChar = ''; |
| |
| // constants |
| const EXPRESSION = 0; |
| const REPLACEMENT = 1; |
| const LENGTH = 2; |
| |
| // used to determine nesting levels |
| private $GROUPS = '/\\(/';//g |
| private $SUB_REPLACE = '/\\$\\d/'; |
| private $INDEXED = '/^\\$\\d+$/'; |
| private $TRIM = '/([\'"])\\1\\.(.*)\\.\\1\\1$/'; |
| private $ESCAPE = '/\\\./';//g |
| private $QUOTE = '/\'/'; |
| private $DELETED = '/\\x01[^\\x01]*\\x01/';//g |
| |
| public function add($expression, $replacement = '') |
| { |
| // count the number of sub-expressions |
| // - add one because each pattern is itself a sub-expression |
| $length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string) $expression), $out); |
| |
| // treat only strings $replacement |
| if (is_string($replacement)) { |
| // does the pattern deal with sub-expressions? |
| if (preg_match($this->SUB_REPLACE, $replacement)) { |
| // a simple lookup? (e.g. "$2") |
| if (preg_match($this->INDEXED, $replacement)) { |
| // store the index (used for fast retrieval of matched strings) |
| $replacement = (int) (substr($replacement, 1)) - 1; |
| } else { // a complicated lookup (e.g. "Hello $2 $1") |
| // build a function to do the lookup |
| $quote = preg_match($this->QUOTE, $this->_internalEscape($replacement)) |
| ? '"' : "'"; |
| $replacement = array( |
| 'fn' => '_backReferences', |
| 'data' => array( |
| 'replacement' => $replacement, |
| 'length' => $length, |
| 'quote' => $quote |
| ) |
| ); |
| } |
| } |
| } |
| // pass the modified arguments |
| if (!empty($expression)) $this->_add($expression, $replacement, $length); |
| else $this->_add('/^$/', $replacement, $length); |
| } |
| |
| public function exec($string) |
| { |
| // execute the global replacement |
| $this->_escaped = array(); |
| |
| // simulate the _patterns.toSTring of Dean |
| $regexp = '/'; |
| foreach ($this->_patterns as $reg) { |
| $regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|'; |
| } |
| $regexp = substr($regexp, 0, -1) . '/'; |
| $regexp .= ($this->ignoreCase) ? 'i' : ''; |
| |
| $string = $this->_escape($string, $this->escapeChar); |
| $string = preg_replace_callback( |
| $regexp, |
| array( |
| &$this, |
| '_replacement' |
| ), |
| $string |
| ); |
| $string = $this->_unescape($string, $this->escapeChar); |
| |
| return preg_replace($this->DELETED, '', $string); |
| } |
| |
| public function reset() |
| { |
| // clear the patterns collection so that this object may be re-used |
| $this->_patterns = array(); |
| } |
| |
| // private |
| private $_escaped = array(); // escaped characters |
| private $_patterns = array(); // patterns stored by index |
| |
| // create and add a new pattern to the patterns collection |
| private function _add() |
| { |
| $arguments = func_get_args(); |
| $this->_patterns[] = $arguments; |
| } |
| |
| // this is the global replace function (it's quite complicated) |
| private function _replacement($arguments) |
| { |
| if (empty($arguments)) return ''; |
| |
| $i = 1; $j = 0; |
| // loop through the patterns |
| while (isset($this->_patterns[$j])) { |
| $pattern = $this->_patterns[$j++]; |
| // do we have a result? |
| if (isset($arguments[$i]) && ($arguments[$i] != '')) { |
| $replacement = $pattern[self::REPLACEMENT]; |
| |
| if (is_array($replacement) && isset($replacement['fn'])) { |
| |
| if (isset($replacement['data'])) $this->buffer = $replacement['data']; |
| return call_user_func(array(&$this, $replacement['fn']), $arguments, $i); |
| |
| } elseif (is_int($replacement)) { |
| return $arguments[$replacement + $i]; |
| |
| } |
| $delete = ($this->escapeChar == '' || |
| strpos($arguments[$i], $this->escapeChar) === false) |
| ? '' : "\x01" . $arguments[$i] . "\x01"; |
| |
| return $delete . $replacement; |
| |
| // skip over references to sub-expressions |
| } else { |
| $i += $pattern[self::LENGTH]; |
| } |
| } |
| } |
| |
| private function _backReferences($match, $offset) |
| { |
| $replacement = $this->buffer['replacement']; |
| $quote = $this->buffer['quote']; |
| $i = $this->buffer['length']; |
| while ($i) { |
| $replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement); |
| } |
| |
| return $replacement; |
| } |
| |
| private function _replace_name($match, $offset) |
| { |
| $length = strlen($match[$offset + 2]); |
| $start = $length - max($length - strlen($match[$offset + 3]), 0); |
| |
| return substr($match[$offset + 1], $start, $length) . $match[$offset + 4]; |
| } |
| |
| private function _replace_encoded($match, $offset) |
| { |
| return $this->buffer[$match[$offset]]; |
| } |
| |
| |
| // php : we cannot pass additional data to preg_replace_callback, |
| // and we cannot use &$this in create_function, so let's go to lower level |
| private $buffer; |
| |
| // encode escaped characters |
| private function _escape($string, $escapeChar) |
| { |
| if ($escapeChar) { |
| $this->buffer = $escapeChar; |
| |
| return preg_replace_callback( |
| '/\\' . $escapeChar . '(.)' .'/', |
| array(&$this, '_escapeBis'), |
| $string |
| ); |
| |
| } else { |
| return $string; |
| } |
| } |
| private function _escapeBis($match) |
| { |
| $this->_escaped[] = $match[1]; |
| |
| return $this->buffer; |
| } |
| |
| // decode escaped characters |
| private function _unescape($string, $escapeChar) |
| { |
| if ($escapeChar) { |
| $regexp = '/'.'\\'.$escapeChar.'/'; |
| $this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0); |
| |
| return preg_replace_callback( |
| $regexp, |
| array(&$this, '_unescapeBis'), |
| $string |
| ); |
| |
| } else { |
| return $string; |
| } |
| } |
| private function _unescapeBis() |
| { |
| if (isset($this->_escaped[$this->buffer['i']]) |
| && $this->_escaped[$this->buffer['i']] != '') |
| { |
| $temp = $this->_escaped[$this->buffer['i']]; |
| } else { |
| $temp = ''; |
| } |
| $this->buffer['i']++; |
| |
| return $this->buffer['escapeChar'] . $temp; |
| } |
| |
| private function _internalEscape($string) |
| { |
| return preg_replace($this->ESCAPE, '', $string); |
| } |
| } |