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) 2005-2010 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 20096 2010-01-06 02:05:09Z 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) 2005-2010 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         return strtoupper(bin2hex($inStr));

    54     }

    55 

    56 

    57     /**

    58      * Unescape string according to the PDF rules

    59      *

    60      * @param string $inStr

    61      * @return string

    62      */

    63     public static function unescape($inStr)

    64     {

    65         $chunks = array();

    66         $offset = 0;

    67         $length = 0;

    68         while ($offset < strlen($inStr)) {

    69             // Collect hexadecimal characters

    70             $start = $offset;

    71             $offset += strspn($inStr, "0123456789abcdefABCDEF", $offset);

    72             $chunks[] = substr($inStr, $start, $offset - $start);

    73             $length += strlen(end($chunks));

    74 

    75             // Skip non-hexadecimal characters

    76             $offset += strcspn($inStr, "0123456789abcdefABCDEF", $offset);

    77         }

    78         if ($length % 2 != 0) {

    79             // We have odd number of digits.

    80             // Final digit is assumed to be '0'

    81             $chunks[] = '0';

    82         }

    83 

    84         return pack('H*' , implode($chunks));

    85     }

    86 

    87 

    88     /**

    89      * Return object as string

    90      *

    91      * @param Zend_Pdf_Factory $factory

    92      * @return string

    93      */

    94     public function toString($factory = null)

    95     {

    96         return '<' . self::escape((string)$this->value) . '>';

    97     }

    98 }