/library/Zend/Pdf/Filter/AsciiHex.php
PHP | 135 lines | 62 code | 15 blank | 58 comment | 23 complexity | 55b913a4924f880c3556d60f07b948e1 MD5 | raw file
- <?php
- /**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * @category Zend
- * @package Zend_Pdf
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: AsciiHex.php 23775 2011-03-01 17:25:24Z ralph $
- */
- /** Zend_Pdf_Filter_Interface */
- require_once 'Zend/Pdf/Filter/Interface.php';
- /**
- * AsciiHex stream filter
- *
- * @package Zend_Pdf
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
- class Zend_Pdf_Filter_AsciiHex implements Zend_Pdf_Filter_Interface
- {
- /**
- * Encode data
- *
- * @param string $data
- * @param array $params
- * @return string
- * @throws Zend_Pdf_Exception
- */
- public static function encode($data, $params = null)
- {
- return bin2hex($data) . '>';
- }
- /**
- * Decode data
- *
- * @param string $data
- * @param array $params
- * @return string
- * @throws Zend_Pdf_Exception
- */
- public static function decode($data, $params = null)
- {
- $output = '';
- $oddCode = true;
- $commentMode = false;
- for ($count = 0; $count < strlen($data) && $data[$count] != '>'; $count++) {
- $charCode = ord($data[$count]);
- if ($commentMode) {
- if ($charCode == 0x0A || $charCode == 0x0D ) {
- $commentMode = false;
- }
- continue;
- }
- switch ($charCode) {
- //Skip white space
- case 0x00: // null character
- // fall through to next case
- case 0x09: // Tab
- // fall through to next case
- case 0x0A: // Line feed
- // fall through to next case
- case 0x0C: // Form Feed
- // fall through to next case
- case 0x0D: // Carriage return
- // fall through to next case
- case 0x20: // Space
- // Do nothing
- break;
- case 0x25: // '%'
- // Switch to comment mode
- $commentMode = true;
- break;
- default:
- if ($charCode >= 0x30 /*'0'*/ && $charCode <= 0x39 /*'9'*/) {
- $code = $charCode - 0x30;
- } else if ($charCode >= 0x41 /*'A'*/ && $charCode <= 0x46 /*'F'*/) {
- $code = $charCode - 0x37/*0x41 - 0x0A*/;
- } else if ($charCode >= 0x61 /*'a'*/ && $charCode <= 0x66 /*'f'*/) {
- $code = $charCode - 0x57/*0x61 - 0x0A*/;
- } else {
- require_once 'Zend/Pdf/Exception.php';
- throw new Zend_Pdf_Exception('Wrong character in a encoded stream');
- }
- if ($oddCode) {
- // Odd pass. Store hex digit for next pass
- // Scope of $hexCodeHigh variable is whole function
- $hexCodeHigh = $code;
- } else {
- // Even pass.
- // Add decoded character to the output
- // ($hexCodeHigh is stored in previous pass)
- $output .= chr($hexCodeHigh*16 + $code);
- }
- $oddCode = !$oddCode;
- break;
- }
- }
- /* Check that stream is terminated by End Of Data marker */
- if ($data[$count] != '>') {
- require_once 'Zend/Pdf/Exception.php';
- throw new Zend_Pdf_Exception('Wrong encoded stream End Of Data marker.');
- }
- /* Last '0' character is omitted */
- if (!$oddCode) {
- $output .= chr($hexCodeHigh*16);
- }
- return $output;
- }
- }