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