'; } /** * 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; } }