library/Zend/Pdf/Element/String/Binary.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category   Zend
  16  * @package    Zend_Pdf
  17  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19  * @version    $Id: Binary.php 16541 2009-07-07 06:59:03Z bkarwin $
  20  */
  21
  22
  23 /** Zend_Pdf_Element_String */
  24 require_once 'Zend/Pdf/Element/String.php';
  25
  26
  27 /**
  28  * PDF file 'binary string' element implementation
  29  *
  30  * @category   Zend
  31  * @package    Zend_Pdf
  32  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  33  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  34  */
  35 class Zend_Pdf_Element_String_Binary extends Zend_Pdf_Element_String
  36 {
  37     /**
  38      * Object value
  39      *
  40      * @var string
  41      */
  42     public $value;
  43
  44
  45     /**
  46      * Escape string according to the PDF rules
  47      *
  48      * @param string $inStr
  49      * @return string
  50      */
  51     public static function escape($inStr)
  52     {
  53         $outStr = '';
  54
  55         for ($count = 0; $count < strlen($inStr); $count++) {
  56             $outStr .= sprintf('%02X', ord($inStr[$count]));
  57         }
  58         return $outStr;
  59     }
  60
  61
  62     /**
  63      * Unescape string according to the PDF rules
  64      *
  65      * @param string $inStr
  66      * @return string
  67      */
  68     public static function unescape($inStr)
  69     {
  70         $outStr = '';
  71         $nextHexCode = '';
  72
  73         for ($count = 0; $count < strlen($inStr); $count++) {
  74             $nextCharCode = ord($inStr[$count]);
  75
  76             if( ($nextCharCode >= 48  /*'0'*/ &&
  77                  $nextCharCode <= 57  /*'9'*/   ) ||
  78                 ($nextCharCode >= 97  /*'a'*/ &&
  79                  $nextCharCode <= 102 /*'f'*/   ) ||
  80                 ($nextCharCode >= 65  /*'A'*/ &&
  81                  $nextCharCode <= 70  /*'F'*/   ) ) {
  82                 $nextHexCode .= $inStr[$count];
  83             }
  84
  85             if (strlen($nextHexCode) == 2) {
  86                 $outStr .= chr(intval($nextHexCode, 16));
  87                 $nextHexCode = '';
  88             }
  89         }
  90
  91         if ($nextHexCode != '') {
  92             // We have odd number of digits.
  93             // Final digit is assumed to be '0'
  94             $outStr .= chr(base_convert($nextHexCode . '0', 16, 10));
  95         }
  96
  97         return $outStr;
  98     }
  99
 100
 101     /**
 102      * Return object as string
 103      *
 104      * @param Zend_Pdf_Factory $factory
 105      * @return string
 106      */
 107     public function toString($factory = null)
 108     {
 109         return '<' . self::escape((string)$this->value) . '>';
 110     }
 111 }