mirror of https://github.com/BOINC/boinc.git
53 lines
1.5 KiB
PHP
53 lines
1.5 KiB
PHP
<?php
|
|
/**
|
|
* A dictionary is a mapping from strings to elements. When BEncoded a dictionary is
|
|
* two lists interleaved. In PHP dictionaries are represented as arrays with the
|
|
* string as index and value as entry at that index.
|
|
* In BEncoded form a dictionary starts with "d" and is followed directly by the
|
|
* contents of the interleaved data list and ends with "e".
|
|
*
|
|
* d3:cow3:moo4:spam4:eggse represents the dictionary { "cow" => "moo", "spam" => "eggs" }
|
|
*/
|
|
|
|
$cvs_version_tracker[]="\$Id$"; //Generated automatically - do not edit
|
|
|
|
class BDictionary {
|
|
private function __construct(){
|
|
}
|
|
|
|
/**
|
|
* Returns the decoded array from $str
|
|
* @throws an IllegalArgumentException in the case
|
|
* that the string is malformed.
|
|
*/
|
|
public static function toArray($str){
|
|
if (substr($str, 0, 1)!="d" || substr($str, -1, 1)!="e") throw new IllegalArgumentException("BEncoded dictionary does not start with d or end with e.");
|
|
// An array is simply two lists encoded in an alternating list
|
|
$arrays = BList::toList("l".substr($str, 1));
|
|
|
|
$i=0;
|
|
for ($i=0;$i<sizeof($arrays); $i+=2){
|
|
$array[$arrays[$i]] = $arrays[$i+1];
|
|
}
|
|
return $array;
|
|
}
|
|
|
|
/**
|
|
* Returns a BEncoded dictonary
|
|
*/
|
|
public static function toEncoded($array){
|
|
ksort($array);
|
|
|
|
// An array is simply two lists encoded as an alternating list
|
|
$list = array();
|
|
foreach ($array as $key => $value){
|
|
$list[] = $key;
|
|
$list[] = $value;
|
|
}
|
|
|
|
return "d".substr(BList::toEncoded($list), 1);
|
|
}
|
|
}
|
|
|
|
|
|
?>
|