archive_version.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2026 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 ARCHIVE_VERSION_HPP
#define ARCHIVE_VERSION_HPP
 
#include "../my_config.h"
 
#include <string>
 
#include "integers.hpp"
 
namespace libdar
{

 
    // no need to dig into this from API
    class generic_file;

 
    class archive_version
    {
    public:

    archive_version(U_16 x = 0, unsigned char fix = 0);
 
    archive_version(const archive_version & ref) = default;
    archive_version(archive_version && ref) noexcept = default;
    archive_version & operator = (const archive_version & ref) = default;
    archive_version & operator = (archive_version && ref) noexcept = default;
    ~archive_version() = default;
 
    bool operator < (const archive_version & ref) const { return value() < ref.value(); };
    bool operator >= (const archive_version & ref) const { return value() >= ref.value(); };
    bool operator == (const archive_version & ref) const { return value() == ref.value(); };
    bool operator != (const archive_version & ref) const { return value() != ref.value(); };
    bool operator > (const archive_version & ref) const { return value() > ref.value(); };
    bool operator <= (const archive_version & ref) const { return value() <= ref.value(); };
 
    void dump(generic_file & f) const;
    void read(generic_file & f);

    std::string display() const;
 
    private:
    U_16 version;
    unsigned char fix;
 
    U_I value() const { return (U_I)(version)*256 + fix; };
    static unsigned char to_digit(unsigned char val);
    static unsigned char to_char(unsigned char val);
    };
 
    extern const archive_version empty_archive_version();

 
} // end of namespace
 
#endif