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98 lines
2.5 KiB
98 lines
2.5 KiB
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/** Zend_Pdf_Element_String */
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// require_once 'Zend/Pdf/Element/String.php';
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/**
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* PDF file 'binary string' element implementation
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*
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* @category Zend
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* @package Zend_Pdf
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* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Pdf_Element_String_Binary extends Zend_Pdf_Element_String
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{
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/**
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* Object value
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*
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* @var string
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*/
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public $value;
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/**
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* Escape string according to the PDF rules
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*
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* @param string $inStr
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* @return string
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*/
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public static function escape($inStr)
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{
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return strtoupper(bin2hex($inStr));
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}
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/**
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* Unescape string according to the PDF rules
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*
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* @param string $inStr
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* @return string
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*/
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public static function unescape($inStr)
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{
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$chunks = array();
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$offset = 0;
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$length = 0;
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while ($offset < strlen($inStr)) {
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// Collect hexadecimal characters
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$start = $offset;
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$offset += strspn($inStr, "0123456789abcdefABCDEF", $offset);
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$chunks[] = substr($inStr, $start, $offset - $start);
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$length += strlen(end($chunks));
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// Skip non-hexadecimal characters
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$offset += strcspn($inStr, "0123456789abcdefABCDEF", $offset);
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}
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if ($length % 2 != 0) {
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// We have odd number of digits.
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// Final digit is assumed to be '0'
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$chunks[] = '0';
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}
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return pack('H*' , implode($chunks));
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}
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/**
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* Return object as string
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*
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* @param Zend_Pdf_Factory $factory
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* @return string
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*/
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public function toString($factory = null)
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{
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return '<' . self::escape((string)$this->value) . '>';
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}
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}
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