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<?php

//

//  FPDI - Version 1.5.4

//

//    Copyright 2004-2015 Setasign - Jan Slabon

//

//  Licensed under the Apache License, Version 2.0 (the "License");

//  you may not use this file except in compliance with the License.

//  You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

//  Unless required by applicable law or agreed to in writing, software

//  distributed under the License is distributed on an "AS IS" BASIS,

//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

//  See the License for the specific language governing permissions and

//  limitations under the License.

//

/**

 * Class FilterASCIIHexDecode

 */

class FilterASCIIHexDecode

{

    /**

     * Converts an ASCII hexadecimal encoded string into it's 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)

    {

        return current(unpack('H*', $data)) . ($leaveEOD ? '' : '>');

    }

}