TypeBase.h

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef IOT_MQTT_TYPES_TYPEBASE_H
#define IOT_MQTT_TYPES_TYPEBASE_H
 
namespace iot::mqtt {
    class MqttContext;
}
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstddef>
#include <vector>
 
#endif // DOXYGEN_SHOULD_SKIP_THIS
 
namespace iot::mqtt::types {
 
    template <typename ValueTypeT>
    class TypeBase {
    protected:
        using ValueType = ValueTypeT;
 
    public:
        explicit TypeBase(std::size_t size = sizeof(ValueType));
        TypeBase(const TypeBase&) = default;
        TypeBase(TypeBase&&) noexcept = default;
 
        virtual ~TypeBase() = default;
 
        TypeBase& operator=(const TypeBase&) = default;
        TypeBase& operator=(TypeBase&&) noexcept = default;
 
        virtual std::size_t deserialize(iot::mqtt::MqttContext* mqttContext);
        virtual std::vector<char> serialize() const;
 
        void setSize(std::size_t size);
 
        std::size_t size();
 
        bool isComplete() const;
 
        virtual void reset(std::size_t size = sizeof(ValueType));
 
    protected:
        std::vector<char> value;
 
        std::size_t length = 0;
        std::size_t needed = 0;
 
        bool complete = false;
 
        int state = 0;
    };
 
} // namespace iot::mqtt::types
 
#endif // IOT_MQTT_TYPES_TYPEBASE_H