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]', $decode);
} elseif ($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;
$unpack = preg_replace_callback('/\\{/', [&$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;
$unpack = preg_replace_callback('/\\{/', [&$this, '_insertFastEncode'], $unpack, 1);
} else {
// perform the encoding inline
$unpack = preg_replace($ENCODE, $inline, $unpack);
}
// pack the boot function too
$unpackPacker = new self($unpack, 0, false, true);
$unpack = $unpackPacker->pack();
// arguments
$params = [$packed, $ascii, $count, $keywords];
if ($this->_fastDecode) {
$params[] = 0;
$params[] = '{}';
}
$params = implode(',', $params);
// the whole thing
return 'eval(' . $unpack . '(' . $params . "))\n";
}
