header_flags.hpp

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/*********************************************************************/
// dar - disk archive - a backup/restoration program
// Copyright (C) 2002-2025 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 HEADER_FLAGS_HPP
#define HEADER_FLAGS_HPP
 
#include "../my_config.h"
#include "generic_file.hpp"
 
namespace libdar
{
 
 
 
    class header_flags
    {
    public:
    header_flags(): bits(0) {};
    header_flags(generic_file & f) { read(f); };
    header_flags(const header_flags & ref) = default;
    header_flags(header_flags && ref) noexcept = default;
    header_flags & operator = (const header_flags & ref) = default;
    header_flags & operator = (header_flags && ref) noexcept = default;
    ~header_flags() = default;
 
    void set_bits(U_I bitfield);
 
    void unset_bits(U_I bitfield);
 
    bool is_set(U_I bitfield) const;
 
    void read(generic_file & f);
 
    void dump(generic_file & f) const;
 
    void clear() { bits = 0; };
 
    bool is_all_cleared() { return bits == 0; };
 
    private:
    U_I bits;    
 
    static bool has_an_lsb_set(U_I bitfield);
    };
 
} // end of namespace
 
#endif