Decompresses a string.
| public decompress ( string $text ) : string | ||
| $text | string | The compressed string. |
| return | string | The decompressed string. |
/**
* Unpack a string.
*
* @param string $data The packed string.
*
* @return mixed The unpacked data.
* @throws Horde_Pack_Exception
*/
public function unpack($data)
{
if (!$data) {
return $data;
}
if (is_string($data)) {
$mask = unpack('C*', $data[0]);
$mask = reset($mask);
$data = substr($data, 1);
if ($mask & self::COMPRESS_MASK) {
$data = self::$_compress->decompress($data);
$mask ^= self::COMPRESS_MASK;
}
if (isset(self::$_drivers[$mask])) {
try {
return self::$_drivers[$mask]->unpack($data);
} catch (Horde_Pack_Exception $e) {
throw $e;
} catch (Exception $e) {
/* Unknown exceptions are handled with the throw below. */
}
}
}
throw new Horde_Pack_Exception('Could not unpack data');
}
/**
*/
public function get($mailbox, $uids, $fields, $uidvalid)
{
$this->getMetaData($mailbox, $uidvalid, array('uidvalid'));
$query = $this->_baseSql($mailbox, self::MSG_TABLE);
$query[0] = 'SELECT t.data, t.msguid ' . $query[0];
$uid_query = array();
foreach ($uids as $val) {
$uid_query[] = 't.msguid = ?';
$query[1][] = strval($val);
}
$query[0] .= ' AND (' . implode(' OR ', $uid_query) . ')';
$compress = new Horde_Compress_Fast();
$out = array();
try {
$columns = $this->_db->columns(self::MSG_TABLE);
$res = $this->_db->select($query[0], $query[1]);
foreach ($res as $row) {
try {
$out[$row['msguid']] = @unserialize($compress->decompress($columns['data']->binaryToString($row['data'])));
} catch (Exception $e) {
}
}
} catch (Horde_Db_Exception $e) {
}
return $out;
}
/**
* Unpack a string.
*
* @param string $data The packed string.
*
* @return mixed The unpacked data.
* @throws Horde_Pack_Exception
*/
public function unpack($data)
{
if (!$data) {
return $data;
}
if (is_string($data)) {
$mask = unpack('C*', $data[0]);
$mask = reset($mask);
$data = substr($data, 1);
if ($mask & self::COMPRESS_MASK) {
$data = self::$_compress->decompress($data);
$mask ^= self::COMPRESS_MASK;
}
if (isset(self::$_drivers[$mask])) {
return self::$_drivers[$mask]->unpack($data);
}
}
throw new Horde_Pack_Exception('Could not unpack data');
}
public function testLz4DriverDecompress()
{
try {
$ob = new Horde_Compress_Fast(array('drivers' => array('Horde_Compress_Fast_Lz4')));
} catch (Horde_Compress_Fast_Exception $e) {
$this->markTestSkipped('Horde LZ4 extension not available.');
}
$this->assertEquals($this->compress_text, $ob->decompress(horde_lz4_compress($this->compress_text)));
try {
$ob->decompress(new stdClass());
$this->fail('Expected exception.');
} catch (Horde_Compress_Fast_Exception $e) {
}
}
/**
* Convert data from/to storage format.
*
* @param mixed|MongoBinData $data The data object.
*
* @return mixed|MongoBinData The converted data.
*/
protected function _value($data)
{
static $compress;
if (!isset($compress)) {
$compress = new Horde_Compress_Fast();
}
return $data instanceof MongoBinData ? @unserialize($compress->decompress($data->bin)) : new MongoBinData($compress->compress(serialize($data)), MongoBinData::BYTE_ARRAY);
}
/**
* Retrieve cached data.
*
* @todo Change default lifetime to 0
*
* @param string $key Object ID to query.
* @param integer $lifetime Lifetime of the object in seconds.
*
* @return mixed Cached data, or false if none was found.
*/
public function get($key, $lifetime = 1)
{
$res = $this->_storage->get($key, $lifetime);
if (empty($this->_params['compress']) || !is_string($res)) {
return $res;
}
$compress = new Horde_Compress_Fast();
return $compress->decompress($res);
}
