/framework/vendor/swift/lib/classes/Swift/Mime/HeaderEncoder/QpHeaderEncoder.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
11require_once dirname(__FILE__) . '/../HeaderEncoder.php';
12require_once dirname(__FILE__) . '/../../Encoder/QpEncoder.php';
13require_once dirname(__FILE__) . '/../../CharacterStream.php';
14
15/**
16 * Handles Quoted Printable (Q) Header Encoding in Swift Mailer.
17 * @package Swift
18 * @subpackage Mime
19 * @author Chris Corbyn
20 */
21class Swift_Mime_HeaderEncoder_QpHeaderEncoder extends Swift_Encoder_QpEncoder
22  implements Swift_Mime_HeaderEncoder
23{
24
25  private static $_headerSafeMap = array();
26
27  /**
28   * Creates a new QpHeaderEncoder for the given CharacterStream.
29   * @param Swift_CharacterStream $charStream to use for reading characters
30   */
31  public function __construct(Swift_CharacterStream $charStream)
32  {
33    parent::__construct($charStream);
34    if (empty(self::$_headerSafeMap))
35    {
36      foreach (array_merge(
37        range(0x61, 0x7A), range(0x41, 0x5A),
38        range(0x30, 0x39), array(0x20, 0x21, 0x2A, 0x2B, 0x2D, 0x2F)
39        ) as $byte)
40      {
41        self::$_headerSafeMap[$byte] = chr($byte);
42      }
43    }
44  }
45
46  /**
47   * Get the name of this encoding scheme.
48   * Returns the string 'Q'.
49   * @return string
50   */
51  public function getName()
52  {
53    return 'Q';
54  }
55
56  /**
57   * Takes an unencoded string and produces a Q encoded string from it.
58   * @param string $string to encode
59   * @param int $firstLineOffset, optional
60   * @param int $maxLineLength, optional, 0 indicates the default of 76 chars
61   * @return string
62   */
63  public function encodeString($string, $firstLineOffset = 0,
64    $maxLineLength = 0)
65  {
66    return str_replace(array(' ', '=20', "=\r\n"), array('_', '_', "\r\n"),
67      parent::encodeString($string, $firstLineOffset, $maxLineLength)
68      );
69  }
70
71  // -- Overridden points of extension
72
73  /**
74   * Encode the given byte array into a verbatim QP form.
75   * @param int[] $bytes
76   * @return string
77   * @access protected
78   */
79  protected function _encodeByteSequence(array $bytes, &$size)
80  {
81    $ret = '';
82    $size=0;
83    foreach ($bytes as $b)
84    {
85      if (isset(self::$_headerSafeMap[$b]))
86      {
87        $ret .= self::$_headerSafeMap[$b];
88        ++$size;
89      }
90      else
91      {
92        $ret .= self::$_qpMap[$b];
93        $size+=3;
94      }
95    }
96    return $ret;
97  }
98
99}