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<?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.
*/
//@require 'Swift/Mime/ContentEncoder.php';
//@require 'Swift/Encoder/Base64Encoder.php';
//@require 'Swift/InputByteStream.php';
//@require 'Swift/OutputByteStream.php';
/**
* Handles Base 64 Transfer Encoding in Swift Mailer.
* @package Swift
* @subpackage Mime
* @author Chris Corbyn
*/
class Swift_Mime_ContentEncoder_Base64ContentEncoder
extends Swift_Encoder_Base64Encoder
implements Swift_Mime_ContentEncoder
{
/**
* Encode stream $in to stream $out.
* @param Swift_OutputByteStream $in
* @param Swift_InputByteStream $out
* @param int $firstLineOffset
* @param int $maxLineLength, optional, 0 indicates the default of 76 bytes
*/
public function encodeByteStream(
Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
$maxLineLength = 0)
{
if (0 >= $maxLineLength || 76 < $maxLineLength)
{
$maxLineLength = 76;
}
$remainder = 0;
while (false !== $bytes = $os->read(8190))
{
$encoded = base64_encode($bytes);
$encodedTransformed = '';
$thisMaxLineLength = $maxLineLength - $remainder - $firstLineOffset;
while ($thisMaxLineLength < strlen($encoded))
{
$encodedTransformed .= substr($encoded, 0, $thisMaxLineLength) . "\r\n";
$firstLineOffset = 0;
$encoded = substr($encoded, $thisMaxLineLength);
$thisMaxLineLength = $maxLineLength;
$remainder = 0;
}
if (0 < $remainingLength = strlen($encoded))
{
$remainder += $remainingLength;
$encodedTransformed .= $encoded;
$encoded = null;
}
$is->write($encodedTransformed);
}
}
/**
* Get the name of this encoding scheme.
* Returns the string 'base64'.
* @return string
*/
public function getName()
{
return 'base64';
}
}
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