slice_layout.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2024 Denis Corbin
//
// 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
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// to contact the author, see the AUTHOR file
/*********************************************************************/



#ifndef SLICE_LAYOUT_HPP
#define SLICE_LAYOUT_HPP

#include <string>
#include <set>

#include "../my_config.h"
#include "infinint.hpp"
#include "generic_file.hpp"

namespace libdar
{

    class slice_layout
    {
    public:
    slice_layout() { clear(); };
    slice_layout(const slice_layout & ref) = default;
    slice_layout(slice_layout && ref) noexcept = default;
    slice_layout & operator = (const slice_layout & ref) = default;
    slice_layout & operator = (slice_layout && ref) noexcept = default;
    ~slice_layout() = default;

        // field still exposed (slice_layout was a struct before being a class)
        // we keep these fields as is for now

    infinint first_size;         
    infinint other_size;         
    infinint first_slice_header; 
    infinint other_slice_header; 
    bool older_sar_than_v8;      

    void read(generic_file & f);
    void write(generic_file & f) const;
    void clear();


    void which_slice(const infinint & offset,
             infinint & slice_num,
             infinint & slice_offset) const;

    private:
    static const char OLDER_THAN_V8 = '7';
    static const char V8 = '8';
    };


} // end of namespace

#endif