<?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_Serializer

 * @subpackage Adapter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Igbinary.php 20574 2010-01-24 17:39:14Z mabe $

 */

/** @see Zend_Serializer_Adapter_AdapterAbstract */

require_once 'Zend/Serializer/Adapter/AdapterAbstract.php';

/**

 * @category   Zend

 * @package    Zend_Serializer

 * @subpackage Adapter

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Serializer_Adapter_Igbinary extends Zend_Serializer_Adapter_AdapterAbstract

{

    /**

     * @var string Serialized null value

     */

    private static $_serializedNull = null;

    /**

     * Constructor

     * 

     * @param  array|Zend_Config $opts 

     * @return void

     * @throws Zend_Serializer_Exception If igbinary extension is not present

     */

    public function __construct($opts = array()) 

    {

        if (!extension_loaded('igbinary')) {

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception('PHP extension "igbinary" is required for this adapter');

        }

        parent::__construct($opts);

        if (self::$_serializedNull === null) {

            self::$_serializedNull = igbinary_serialize(null);

        }

    }

    /**

     * Serialize PHP value to igbinary

     * 

     * @param  mixed $value 

     * @param  array $opts 

     * @return string

     * @throws Zend_Serializer_Exception on igbinary error

     */

    public function serialize($value, array $opts = array())

    {

        $ret = igbinary_serialize($value);

        if ($ret === false) {

            $lastErr = error_get_last();

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception($lastErr['message']);

        }

        return $ret;

    }

    /**

     * Deserialize igbinary string to PHP value

     * 

     * @param  string|binary $serialized 

     * @param  array $opts 

     * @return mixed

     * @throws Zend_Serializer_Exception on igbinary error

     */

    public function unserialize($serialized, array $opts = array())

    {

        $ret = igbinary_unserialize($serialized);

        if ($ret === null && $serialized !== self::$_serializedNull) {

            $lastErr = error_get_last();

            require_once 'Zend/Serializer/Exception.php';

            throw new Zend_Serializer_Exception($lastErr['message']);

        }

        return $ret;

    }

}