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<?php
# Pure virtual parent
class HistoryBlob
{
function setMeta() {}
function getMeta() {}
function addItem() {}
function getItem() {}
}
# The real object
class ConcatenatedGzipHistoryBlob
{
/* private */ var $mVersion = 0, $mCompressed = false, $mItems = array();
function HistoryBlob() {
if ( !function_exists( 'gzdeflate' ) ) {
die( "Need zlib support to read or write this kind of history object (ConcatenatedGzipHistoryBlob)\n" );
}
}
function setMeta( $metaData ) {
$this->uncompress();
$this->mItems['meta'] = $metaData;
}
function getMeta() {
$this->uncompress();
return $this->mItems['meta'];
}
function addItem( $text ) {
$this->uncompress();
$this->mItems[md5($text)] = $text;
}
function getItem( $hash ) {
$this->compress();
return $this->mItems[$hash];
}
function compress() {
if ( !$this->mCompressed ) {
$this->mItems = gzdeflate( serialize( $this->mItems ) );
$this->mCompressed = true;
}
}
function uncompress() {
if ( $this->mCompressed ) {
$this->mItems = unserialize( gzinflate( $this->mItems ) );
}
}
function __sleep() {
compress();
}
function __wakeup() {
uncompress();
}
}
?>
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