portapack-mayhem/firmware/application/io_file.hpp

/*
 * Copyright (C) 2016 Jared Boone, ShareBrained Technology, Inc.
 *
 * This file is part of PortaPack.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#include "io.hpp"

#include "file.hpp"
#include "optional.hpp"

#include <cstdint>

class FileReader : public stream::Reader {
   public:
    FileReader() = default;

    FileReader(const FileReader&) = delete;
    FileReader& operator=(const FileReader&) = delete;
    FileReader(FileReader&& file) = delete;
    FileReader& operator=(FileReader&&) = delete;

    Optional<File::Error> open(const std::filesystem::path& filename) {
        return file_.open(filename);
    }

    File::Result<File::Size> read(void* const buffer, const File::Size bytes) override;
    const File& file() const& { return file_; }

   protected:
    File file_{};
    uint64_t bytes_read_{0};
};

class FileWriter : public stream::Writer {
   public:
    FileWriter() = default;

    FileWriter(const FileWriter&) = delete;
    FileWriter& operator=(const FileWriter&) = delete;
    FileWriter(FileWriter&& file) = delete;
    FileWriter& operator=(FileWriter&&) = delete;

    Optional<File::Error> create(const std::filesystem::path& filename) {
        return file_.create(filename);
    }

    File::Result<File::Size> write(const void* const buffer, const File::Size bytes) override;
    const File& file() const& { return file_; }

   protected:
    File file_{};
    uint64_t bytes_written_{0};
};

using RawFileWriter = FileWriter;