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<?php
/**
* This file is part of FPDI
*
* @package setasign\Fpdi
* @copyright Copyright (c) 2020 Setasign GmbH & Co. KG (https://www.setasign.com)
* @license http://opensource.org/licenses/mit-license The MIT License
*/
namespace setasign\Fpdi\PdfParser\Filter;
/**
* Class for handling ASCII hexadecimal encoded data
*/
class AsciiHex implements FilterInterface
{
/**
* Converts an ASCII hexadecimal encoded string into its binary representation.
*
* @param string $data The input string
* @return string
*/
public function decode($data)
{
$data = \preg_replace('/[^0-9A-Fa-f]/', '', \rtrim($data, '>'));
if ((\strlen($data) % 2) === 1) {
$data .= '0';
}
return \pack('H*', $data);
}
/**
* Converts a string into ASCII hexadecimal representation.
*
* @param string $data The input string
* @param boolean $leaveEOD
* @return string
*/
public function encode($data, $leaveEOD = false)
{
$t = \unpack('H*', $data);
return \current($t)
. ($leaveEOD ? '' : '>');
}
}
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