fsfw/serialize/SerializeIF.h

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2020-08-18 13:09:15 +02:00
#ifndef SERIALIZEIF_H_
#define SERIALIZEIF_H_
#include "../returnvalues/HasReturnvaluesIF.h"
#include <cstddef>
/**
* @defgroup serialize Serialization
* Contains serialisation services.
*/
/**
* @brief An interface for alle classes which require
* translation of objects data into data streams and vice-versa.
* @details
* If the target architecture is little endian (e.g. ARM), any data types
* created might have the wrong endianess if they are to be used for the FSFW.
* Depending on the system architecture, endian correctness must be assured,
* This is important for incoming and outgoing data. The internal handling
* of data should be performed in the native system endianness.
* There are three ways to copy data (with different options to ensure
* endian correctness):
*
* 1. Use the @c AutoSerializeAdapter::deSerialize function (with
* the endian flag)
* 2. Perform a bitshift operation (with correct order)
* 3. @c memcpy (with @c EndianSwapper if necessary)
*
* When serializing for downlink, the packets are generally serialized
* assuming big endian data format like seen in TmPacketStored.cpp for example.
*
* @ingroup serialize
*/
class SerializeIF {
public:
enum class Endianness : uint8_t {
BIG, LITTLE, MACHINE
};
static const uint8_t INTERFACE_ID = CLASS_ID::SERIALIZE_IF;
static const ReturnValue_t BUFFER_TOO_SHORT = MAKE_RETURN_CODE(1);
static const ReturnValue_t STREAM_TOO_SHORT = MAKE_RETURN_CODE(2);
static const ReturnValue_t TOO_MANY_ELEMENTS = MAKE_RETURN_CODE(3);
virtual ~SerializeIF() {
}
virtual ReturnValue_t serialize(uint8_t **buffer, size_t *size,
size_t maxSize, Endianness streamEndianness) const = 0;
virtual size_t getSerializedSize() const = 0;
virtual ReturnValue_t deSerialize(const uint8_t **buffer, size_t *size,
Endianness streamEndianness) = 0;
};
#endif /* SERIALIZEIF_H_ */