FileReader.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
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 * This program is distributed in the hope that it will be useful,
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 * 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/>.
 */
 
/*
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
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#ifndef CORE_FILE_FILEREADER_H
#define CORE_FILE_FILEREADER_H
 
#include "core/EventReceiver.h"
#include "core/file/File.h"
#include "core/pipe/Source.h" // IWYU pragma: export
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include <cstddef>
#include <functional>
#include <string>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace core::file {
 
    class FileReader
        : private core::EventReceiver
        , public core::pipe::Source
        , virtual public File {
    private:
        FileReader(int fd, const std::string& name, std::size_t pufferSize, int openErrno);
 
    public:
        static FileReader* open(const std::string& path, const std::function<void(int)>& callback);
 
        bool isOpen() override;
 
        void start() final;
        void suspend() final;
        void resume() final;
        void stop() final;
 
    private:
        void onEvent(const utils::Timeval& currentTime) override;
 
        std::size_t pufferSize = 0;
 
        bool suspended = false;
 
    protected:
        int openErrno = 0;
        bool running = false;
    };
 
} // namespace core::file
 
#endif // CORE_FILE_FILEREADER_H