C:/xampp/htdocs/moodle/lib/zend/Zend/Amf/Parse/Amf3/Deserializer.php

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<?php
require_once 'Zend/Amf/Parse/Deserializer.php';

require_once 'Zend/Amf/Parse/TypeLoader.php';

class Zend_Amf_Parse_Amf3_Deserializer extends Zend_Amf_Parse_Deserializer
{
    protected $_objectCount;

    protected $_referenceObjects = array();

    protected $_referenceStrings = array();

    protected $_referenceDefinitions = array();

    public function readTypeMarker($typeMarker = null)
    {
        if(null === $typeMarker) {
            $typeMarker = $this->_stream->readByte();
        }

        switch($typeMarker) {
            case Zend_Amf_Constants::AMF3_UNDEFINED:
                 return null;
            case Zend_Amf_Constants::AMF3_NULL:
                 return null;
            case Zend_Amf_Constants::AMF3_BOOLEAN_FALSE:
                 return false;
            case Zend_Amf_Constants::AMF3_BOOLEAN_TRUE:
                 return true;
            case Zend_Amf_Constants::AMF3_INTEGER:
                 return $this->readInteger();
            case Zend_Amf_Constants::AMF3_NUMBER:
                 return $this->_stream->readDouble();
            case Zend_Amf_Constants::AMF3_STRING:
                 return $this->readString();
            case Zend_Amf_Constants::AMF3_DATE:
                 return $this->readDate();
            case Zend_Amf_Constants::AMF3_ARRAY:
                 return $this->readArray();
            case Zend_Amf_Constants::AMF3_OBJECT:
                 return $this->readObject();
            case Zend_Amf_Constants::AMF3_XML:
            case Zend_Amf_Constants::AMF3_XMLSTRING:
                 return $this->readXmlString();
            case Zend_Amf_Constants::AMF3_BYTEARRAY:
                 return $this->readString();
            default:
                require_once 'Zend/Amf/Exception.php';
                throw new Zend_Amf_Exception('Unsupported type marker: ' . $typeMarker);
        }
    }

    public function readInteger()
    {
        $count        = 1;
        $intReference = $this->_stream->readByte();
        $result       = 0;
        while ((($intReference & 0x80) != 0) && $count < 4) {
            $result       <<= 7;
            $result        |= ($intReference & 0x7f);
            $intReference   = $this->_stream->readByte();
            $count++;
        }
        if ($count < 4) {
            $result <<= 7;
            $result  |= $intReference;
        } else {
            // Use all 8 bits from the 4th byte
            $result <<= 8;
            $result  |= $intReference;

            // Check if the integer should be negative
            if (($result & 0x10000000) != 0) {
                //and extend the sign bit
                $result |= ~0xFFFFFFF;
            }
        }
        return $result;
    }

    public function readString()
    {
        $stringReference = $this->readInteger();

        //Check if this is a reference string
        if (($stringReference & 0x01) == 0) {
            // reference string
            $stringReference = $stringReference >> 1;
            if ($stringReference >= count($this->_referenceStrings)) {
                require_once 'Zend/Amf/Exception.php';
                throw new Zend_Amf_Exception('Undefined string reference: ' . $stringReference);
            }
            // reference string found
            return $this->_referenceStrings[$stringReference];
        }

        $length = $stringReference >> 1;
        if ($length) {
            $string = $this->_stream->readBytes($length);
            $this->_referenceStrings[] = $string;
        } else {
            $string = "";
        }
        return $string;
    }

    public function readDate()
    {
        $dateReference = $this->readInteger();
        if (($dateReference & 0x01) == 0) {
            $dateReference = $dateReference >> 1;
            if ($dateReference>=count($this->_referenceObjects)) {
                require_once 'Zend/Amf/Exception.php';
                throw new Zend_Amf_Exception('Undefined date reference: ' . $dateReference);
            }
            return $this->_referenceObjects[$dateReference];
        }

        $timestamp = floor($this->_stream->readDouble() / 1000);

        require_once 'Zend/Date.php';
        $dateTime  = new Zend_Date((int) $timestamp);
        $this->_referenceObjects[] = $dateTime;
        return $dateTime;
    }

    public function readArray()
    {
        $arrayReference = $this->readInteger();
        if (($arrayReference & 0x01)==0){
            $arrayReference = $arrayReference >> 1;
            if ($arrayReference>=count($this->_referenceObjects)) {
                require_once 'Zend/Amf/Exception.php';
                throw new Zend_Amf_Exception('Unknow array reference: ' . $arrayReference);
            }
            return $this->_referenceObjects[$arrayReference];
        }

        // Create a holder for the array in the reference list
        $data = array();
        $this->_referenceObjects[] =& $data;
        $key = $this->readString();

        // Iterating for string based keys.
        while ($key != '') {
            $data[$key] = $this->readTypeMarker();
            $key = $this->readString();
        }

        $arrayReference = $arrayReference >>1;

        //We have a dense array
        for ($i=0; $i < $arrayReference; $i++) {
            $data[] = $this->readTypeMarker();
        }

        return $data;
    }

    public function readObject()
    {
        $traitsInfo   = $this->readInteger();
        $storedObject = ($traitsInfo & 0x01)==0;
        $traitsInfo   = $traitsInfo >> 1;

        // Check if the Object is in the stored Objects reference table
        if ($storedObject) {
            $ref = $traitsInfo;
            if (!isset($this->_referenceObjects[$ref])) {
                require_once 'Zend/Amf/Exception.php';
                throw new Zend_Amf_Exception('Unknown Object reference: ' . $ref);
            }
            $returnObject = $this->_referenceObjects[$ref];
        } else {
            // Check if the Object is in the stored Definitions reference table
            $storedClass = ($traitsInfo & 0x01) == 0;
            $traitsInfo  = $traitsInfo >> 1;
            if ($storedClass) {
                $ref = $traitsInfo;
                if (!isset($this->_referenceDefinitions[$ref])) {
                    require_once 'Zend/Amf/Exception.php';
                    throw new Zend_Amf_Exception('Unknows Definition reference: '. $ref);
                }
                // Populate the reference attributes
                $className     = $this->_referenceDefinitions[$ref]['className'];
                $encoding      = $this->_referenceDefinitions[$ref]['encoding'];
                $propertyNames = $this->_referenceDefinitions[$ref]['propertyNames'];
            } else {
                // The class was not in the reference tables. Start reading rawdata to build traits.
                // Create a traits table. Zend_Amf_Value_TraitsInfo would be ideal
                $className     = $this->readString();
                $encoding      = $traitsInfo & 0x03;
                $propertyNames = array();
                $traitsInfo    = $traitsInfo >> 2;
            }

            // We now have the object traits defined in variables. Time to go to work:
            if (!$className) {
                // No class name generic object
                $returnObject = new stdClass();
            } else {
                // Defined object
                // Typed object lookup against registered classname maps
                if ($loader = Zend_Amf_Parse_TypeLoader::loadType($className)) {
                    $returnObject = new $loader();
                } else {
                    //user defined typed object
                    require_once 'Zend/Amf/Exception.php';
                    throw new Zend_Amf_Exception('Typed object not found: '. $className . ' ');
                }
            }

            // Add the Object to the reference table
            $this->_referenceObjects[] = $returnObject;

            $properties = array(); // clear value
            // Check encoding types for additional processing.
            switch ($encoding) {
                case (Zend_Amf_Constants::ET_EXTERNAL):
                    // Externalizable object such as {ArrayCollection} and {ObjectProxy}
                    if (!$storedClass) {
                        $this->_referenceDefinitions[] = array(
                            'className'     => $className,
                            'encoding'      => $encoding,
                            'propertyNames' => $propertyNames,
                        );
                    }
                    $returnObject->externalizedData = $this->readTypeMarker();
                    break;
                case (Zend_Amf_Constants::ET_DYNAMIC):
                    // used for Name-value encoding
                    if (!$storedClass) {
                        $this->_referenceDefinitions[] = array(
                            'className'     => $className,
                            'encoding'      => $encoding,
                            'propertyNames' => $propertyNames,
                        );
                    }
                    // not a reference object read name value properties from byte stream
                    do {
                        $property = $this->readString();
                        if ($property != "") {
                            $propertyNames[]       = $property;
                            $properties[$property] = $this->readTypeMarker();
                        }
                    } while ($property !="");
                    break;
                default:
                    // basic property list object.
                    if (!$storedClass) {
                        $count = $traitsInfo; // Number of properties in the list
                        for($i=0; $i< $count; $i++) {
                            $propertyNames[] = $this->readString();
                        }
                        // Add a reference to the class.
                        $this->_referenceDefinitions[] = array(
                            'className'     => $className,
                            'encoding'      => $encoding,
                            'propertyNames' => $propertyNames,
                        );
                    }
                    foreach ($propertyNames as $property) {
                        $properties[$property] = $this->readTypeMarker();
                    }
                    break;
            }

            // Add properties back to the return object.
            foreach($properties as $key=>$value) {
                if($key) {
                    $returnObject->$key = $value;
                }
            }


        }

       if ($returnObject instanceof Zend_Amf_Value_Messaging_ArrayCollection) {
            if (isset($returnObject->externalizedData)) {
                $returnObject = $returnObject->externalizedData;
            } else {
                $returnObject = get_object_vars($returnObject);
            }
       }

        return $returnObject;
    }

    public function readXmlString()
    {
        $xmlReference = $this->readInteger();
        $length = $xmlReference >> 1;
        $string = $this->_stream->readBytes($length);
        return simplexml_load_string($string);
    }
}