<?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.
*/
/**
* An abstract means of reading and writing data in terms of characters as opposed
* to bytes.
*
* Classes implementing this interface may use a subsystem which requires less
* memory than working with large strings of data.
*
* @author Chris Corbyn
*/
interface Swift_CharacterStream
{
/**
* Set the character set used in this CharacterStream.
*
* @param string $charset
*/
public function setCharacterSet($charset);
/**
* Set the CharacterReaderFactory for multi charset support.
*
* @param Swift_CharacterReaderFactory $factory
*/
public function setCharacterReaderFactory(Swift_CharacterReaderFactory $factory);
/**
* Overwrite this character stream using the byte sequence in the byte stream.
*
* @param Swift_OutputByteStream $os output stream to read from
*/
public function importByteStream(Swift_OutputByteStream $os);
/**
* Import a string a bytes into this CharacterStream, overwriting any existing
* data in the stream.
*
* @param string $string
*/
public function importString($string);
/**
* Read $length characters from the stream and move the internal pointer
* $length further into the stream.
*
* @param int $length
*
* @return string
*/
public function read($length);
/**
* Read $length characters from the stream and return a 1-dimensional array
* containing there octet values.
*
* @param int $length
*
* @return int[]
*/
public function readBytes($length);
/**
* Write $chars to the end of the stream.
*
* @param string $chars
*/
public function write($chars);
/**
* Move the internal pointer to $charOffset in the stream.
*
* @param int $charOffset
*/
public function setPointer($charOffset);
/**
* Empty the stream and reset the internal pointer.
*/
public function flushContents();
}