<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Processes bytes as they pass through a stream and performs filtering.
* @package Swift
* @author Chris Corbyn
interface Swift_StreamFilter
{
* Based on the buffer given, this returns true if more buffering is needed.
* @param mixed $buffer
* @return boolean
public function shouldBuffer($buffer);
* Filters $buffer and returns the changes.
* @return mixed
public function filter($buffer);
}