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label.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 LABEL_HPP
#define LABEL_HPP
#include "../my_config.h"
#include "integers.hpp"
#include "generic_file.hpp"
namespace libdar
{
class label
{
public:
label(); // builds a label equal to 'zero'
label(const label & ref) { copy_from(ref); };
label(label && ref) noexcept { move_from(std::move(ref)); };
label & operator = (const label & ref) { copy_from(ref); return *this; };
label & operator = (label && ref) noexcept { move_from(std::move(ref)); return *this; };
~label() = default;
bool operator == (const label & ref) const;
bool operator != (const label & ref) const { return ! ((*this) == ref); };
void clear();
bool is_cleared() const;
void generate_internal_filename();
void read(generic_file & f);
void dump(generic_file & f) const;
void invert_first_byte() { val[0] = ~val[0]; };
// avoid using these two calls, only here for backward compatibility
// where the cost to move to object is really too heavy than
// sticking with a char array.
U_I size() const { return LABEL_SIZE; };
char *data() { return (char *)&val; };
const char *data() const { return (char *)&val; };
static U_I common_size() { return LABEL_SIZE; };
private:
static constexpr U_I LABEL_SIZE = 10;
char val[LABEL_SIZE];
void copy_from(const label & ref);
void move_from(label && ref) noexcept;
};
extern const label label_zero;
} // end of namespace
#endif
libdar::generic_file
this is the interface class from which all other data transfer classes inherit
Definition generic_file.hpp:77
libdar::label
manage label data structure used in archive slice headers
Definition label.hpp:43
generic_file.hpp
class generic_file is defined here as well as class fichier
integers.hpp
are defined here basic integer types that tend to be portable
my_config.h
include macro defined by the configure script and some specific additional ones
libdar
libdar namespace encapsulate all libdar symbols
Definition archive.hpp:47