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70 lines
2.0 KiB
PHP
70 lines
2.0 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Handles Base 64 Transfer Encoding in Swift Mailer.
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*
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* @package Swift
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* @subpackage Mime
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* @author Chris Corbyn
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*/
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class Swift_Mime_ContentEncoder_Base64ContentEncoder extends Swift_Encoder_Base64Encoder implements Swift_Mime_ContentEncoder
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{
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/**
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* Encode stream $in to stream $out.
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*
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* @param Swift_OutputByteStream $os
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* @param Swift_InputByteStream $is
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* @param integer $firstLineOffset
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* @param integer $maxLineLength, optional, 0 indicates the default of 76 bytes
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*/
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public function encodeByteStream(Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0, $maxLineLength = 0)
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{
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if (0 >= $maxLineLength || 76 < $maxLineLength) {
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$maxLineLength = 76;
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}
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$remainder = 0;
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while (false !== $bytes = $os->read(8190)) {
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$encoded = base64_encode($bytes);
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$encodedTransformed = '';
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$thisMaxLineLength = $maxLineLength - $remainder - $firstLineOffset;
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while ($thisMaxLineLength < strlen($encoded)) {
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$encodedTransformed .= substr($encoded, 0, $thisMaxLineLength) . "\r\n";
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$firstLineOffset = 0;
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$encoded = substr($encoded, $thisMaxLineLength);
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$thisMaxLineLength = $maxLineLength;
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$remainder = 0;
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}
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if (0 < $remainingLength = strlen($encoded)) {
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$remainder += $remainingLength;
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$encodedTransformed .= $encoded;
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$encoded = null;
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}
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$is->write($encodedTransformed);
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}
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}
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/**
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* Get the name of this encoding scheme.
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* Returns the string 'base64'.
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*
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* @return string
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*/
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public function getName()
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{
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return 'base64';
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}
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}
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