application/vendor/swiftmailer/classes/Swift/Mime/ContentEncoder/Base64ContentEncoder.php

   1 <?php
   2
   3 /*
   4  * This file is part of SwiftMailer.
   5  * (c) 2004-2009 Chris Corbyn
   6  *
   7  * For the full copyright and license information, please view the LICENSE
   8  * file that was distributed with this source code.
   9  */
  10
  11 //@require 'Swift/Mime/ContentEncoder.php';
  12 //@require 'Swift/Encoder/Base64Encoder.php';
  13 //@require 'Swift/InputByteStream.php';
  14 //@require 'Swift/OutputByteStream.php';
  15
  16 /**
  17  * Handles Base 64 Transfer Encoding in Swift Mailer.
  18  * @package Swift
  19  * @subpackage Mime
  20  * @author Chris Corbyn
  21  */
  22 class Swift_Mime_ContentEncoder_Base64ContentEncoder
  23   extends Swift_Encoder_Base64Encoder
  24   implements Swift_Mime_ContentEncoder
  25 {
  26
  27   /**
  28    * Encode stream $in to stream $out.
  29    * @param Swift_OutputByteStream $in
  30    * @param Swift_InputByteStream $out
  31    * @param int $firstLineOffset
  32    * @param int $maxLineLength, optional, 0 indicates the default of 76 bytes
  33    */
  34   public function encodeByteStream(
  35     Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
  36     $maxLineLength = 0)
  37   {
  38     if (0 >= $maxLineLength || 76 < $maxLineLength)
  39     {
  40       $maxLineLength = 76;
  41     }
  42
  43     $remainder = 0;
  44
  45     while (false !== $bytes = $os->read(8190))
  46     {
  47       $encoded = base64_encode($bytes);
  48       $encodedTransformed = '';
  49       $thisMaxLineLength = $maxLineLength - $remainder - $firstLineOffset;
  50
  51       while ($thisMaxLineLength < strlen($encoded))
  52       {
  53         $encodedTransformed .= substr($encoded, 0, $thisMaxLineLength) . "\r\n";
  54         $firstLineOffset = 0;
  55         $encoded = substr($encoded, $thisMaxLineLength);
  56         $thisMaxLineLength = $maxLineLength;
  57         $remainder = 0;
  58       }
  59
  60       if (0 < $remainingLength = strlen($encoded))
  61       {
  62         $remainder += $remainingLength;
  63         $encodedTransformed .= $encoded;
  64         $encoded = null;
  65       }
  66
  67       $is->write($encodedTransformed);
  68     }
  69   }
  70
  71   /**
  72    * Get the name of this encoding scheme.
  73    * Returns the string 'base64'.
  74    * @return string
  75    */
  76   public function getName()
  77   {
  78     return 'base64';
  79   }
  80
  81 }