<?php
class TorrentReader {
static public function parse( $data, &$reader = null ) {
$reader = new self($data);
$reader->_parse();
return $reader->output;
}
public $debug = false;
protected $types = array();
protected $dataLength = -1;
public $input = '';
public $output;
public $iterations = -1;
public function __construct( $data ) {
$this->input = $data;
$this->dataLength = strlen($this->input);
}
public function _parse() {
$key = $content = null;
$php = '';
$keyval = 'root';
$start = 0;
$i = 0;
while ( $start < $this->dataLength && $i < 99999 ) {
if ( !is_numeric($start) ) {
break;
}
$i++;
// end
if ( 'e' == substr($this->input, $start, 1) ) {
$ct = array_pop($this->types);
$php .= str_repeat("\t", count($this->types));
$php .= '),'."\n";
$key = true;
if ( $this->debug ) {
echo '<p><b>END CURRENT '.$ct.'</b></p>';
}
$start += 1;
continue;
}
// dict
else if ( 'd' == substr($this->input, $start, 1) ) {
$php .= str_repeat("\t", count($this->types));
$php .= ( $this->dict() ? "'".addslashes($keyval)."'".' => array(' : 'array(' )."\n";
$key = true;
if ( $this->debug ) {
echo '<p><b>NEW DICTIONARY</b></p>';
}
$start += 1;
$this->types[] = 'dict';
continue;
}
// list
else if ( 'l' == substr($this->input, $start, 1) ) {
$php .= str_repeat("\t", count($this->types));
$php .= ( $this->dict() ? "'".addslashes($keyval)."'".' => array(' : 'array(' )."\n";
if ( $this->debug ) {
echo '<p><b>NEW LIST</b></p>';
}
$start += 1;
$this->types[] = 'list';
continue;
}
// value = Integer
if ( in_array(substr($this->input, $start, 1), array('i', 'f')) ) {
$end = strpos($this->input, 'e', $start+1);
$content = substr($this->input, $start+1, $end-$start-1);
if ( !is_numeric($content) ) {
break;
}
$content = (float)$content;
$start = $end+1;
}
// value = String
else {
$lpos = strpos($this->input, ':', $start);
$length = substr($this->input, $start, $lpos-$start);
if ( !is_numeric($length) ) {
break;
}
$start = $lpos+1;
$content = substr($this->input, $start, $length);
$start += $length;
}
if ( 'dict' != $this->ct() || !$key ) {
$php .= str_repeat("\t", count($this->types));
$php .= ( $this->dict() ? "'".$keyval."'".' => '."'".addslashes($content)."'" : "'".addslashes($content)."'" ).",\n";
}
if ( $this->debug ) {
echo '<pre>';
var_dump($content);
echo '</pre>';
}
if ( 'dict' == $this->ct() ) {
$keyval = $content;
$key = !$key;
}
}
$phpArray = false;
@eval('$phpArray = array('.$php.');');
if ( $phpArray && isset($phpArray[0]) ) {
$this->output = $phpArray[0];
$this->iterations = $i;
return true;
}
return false;
}
protected function ct() {
return !$this->types ? null : $this->types[count($this->types)-1];
}
protected function dict() {
return 'dict' == $this->ct();
}
}
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