CCloudStorageBucket::ParseSize

static function ParseSize($str)
{
	static $scale = array(
		'' => 1.0,
		'K' => 1024.0,
		'M' => 1048576.0,
		'G' => 1073741824.0,
	);
	$str = mb_strtoupper(trim($str));
	if($str !== '' && preg_match("/([0-9.]+)(|K|M|G)$/", $str, $match) > 0)
	{
		return doubleval($match[1])*$scale[$match[2]];
	}
	else
	{
		return 0.0;
	}
}