CBORDecoder.h

//
// This file is part of ArduinoCloudThing
//
// Copyright 2019 ARDUINO SA (http://www.arduino.cc/)
//
// This software is released under the GNU General Public License version 3,
// which covers the main part of ArduinoCloudThing.
// The terms of this license can be found at:
// https://www.gnu.org/licenses/gpl-3.0.en.html
//
// You can be released from the requirements of the above licenses by purchasing
// a commercial license. Buying such a license is mandatory if you want to modify or
// otherwise use the software for commercial activities involving the Arduino
// software without disclosing the source code of your own applications. To purchase
// a commercial license, send an email to license@arduino.cc.
//

#ifndef ARDUINO_CBOR_CBOR_DECODER_H_
#define ARDUINO_CBOR_CBOR_DECODER_H_

/******************************************************************************
   INCLUDE
 ******************************************************************************/

#include <Arduino.h>

#undef max
#undef min
#include <list>

#include "../property/PropertyContainer.h"

/******************************************************************************
   CLASS DECLARATION
 ******************************************************************************/

class CBORDecoder
{

public:

  /* decode a CBOR payload received from the cloud */
  static void decode(PropertyContainer & property_container, uint8_t const * const payload, size_t const length, bool isSyncMessage = false);


private:

  CBORDecoder() { }
  CBORDecoder(CBORDecoder const &) { }

  enum class MapParserState {
    EnterMap,
    MapKey,
    UndefinedKey,
    BaseVersion,
    BaseName,
    BaseTime,
    Name,
    Value,
    StringValue,
    BooleanValue,
    Time,
    LeaveMap,
    Complete,
    Error
  };

  static MapParserState handle_EnterMap(CborValue * map_iter, CborValue * value_iter);
  static MapParserState handle_MapKey(CborValue * value_iter);
  static MapParserState handle_UndefinedKey(CborValue * value_iter);
  static MapParserState handle_BaseVersion(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_BaseName(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_BaseTime(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_Name(CborValue * value_iter, CborMapData & map_data, PropertyContainer & property_container);
  static MapParserState handle_Value(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_StringValue(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_BooleanValue(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_Time(CborValue * value_iter, CborMapData & map_data);
  static MapParserState handle_LeaveMap(CborValue * map_iter, CborValue * value_iter, CborMapData & map_data, PropertyContainer & property_container, String & current_property_name, unsigned long & current_property_base_time, unsigned long & current_property_time, bool const is_sync_message, std::list<CborMapData> & map_data_list);

  static bool   ifNumericConvertToDouble(CborValue * value_iter, double * numeric_val);
  static double convertCborHalfFloatToDouble(uint16_t const half_val);

};

#endif /* ARDUINO_CBOR_CBOR_DECODER_H_ */