Disk ARchive 2.7.16
Full featured and portable backup and archiving tool
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label.hpp
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1/*********************************************************************/
2// dar - disk archive - a backup/restoration program
3// Copyright (C) 2002-2024 Denis Corbin
4//
5// This program is free software; you can redistribute it and/or
6// modify it under the terms of the GNU General Public License
7// as published by the Free Software Foundation; either version 2
8// of the License, or (at your option) any later version.
9//
10// This program is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with this program; if not, write to the Free Software
17// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18//
19// to contact the author, see the AUTHOR file
20/*********************************************************************/
21
25
26#ifndef LABEL_HPP
27#define LABEL_HPP
28
29#include "../my_config.h"
30
31#include "integers.hpp"
32#include "generic_file.hpp"
33
34namespace libdar
35{
36
39
41
42 class label
43 {
44 public:
45 label(); // builds a label equal to 'zero'
46 label(const label & ref) { copy_from(ref); };
47 label(label && ref) noexcept { move_from(std::move(ref)); };
48 label & operator = (const label & ref) { copy_from(ref); return *this; };
49 label & operator = (label && ref) noexcept { move_from(std::move(ref)); return *this; };
50 ~label() = default;
51
52 bool operator == (const label & ref) const;
53 bool operator != (const label & ref) const { return ! ((*this) == ref); };
54
55 void clear();
56 bool is_cleared() const;
57
58 void generate_internal_filename();
59
60 void read(generic_file & f);
61 void dump(generic_file & f) const;
62
63 void invert_first_byte() { val[0] = ~val[0]; };
64
65 // avoid using these two calls, only here for backward compatibility
66 // where the cost to move to object is really too heavy than
67 // sticking with a char array.
68 U_I size() const { return LABEL_SIZE; };
69 char *data() { return (char *)&val; };
70 const char *data() const { return (char *)&val; };
71
72 static U_I common_size() { return LABEL_SIZE; };
73
74 private:
75 static constexpr U_I LABEL_SIZE = 10;
76
77 char val[LABEL_SIZE];
78
79 void copy_from(const label & ref);
80 void move_from(label && ref) noexcept;
81 };
82
83
84 extern const label label_zero;
85
87
88} // end of namespace
89
90#endif
this is the interface class from which all other data transfer classes inherit
manage label data structure used in archive slice headers
Definition label.hpp:43
class generic_file is defined here as well as class fichier
are defined here basic integer types that tend to be portable
include macro defined by the configure script and some specific additional ones
libdar namespace encapsulate all libdar symbols
Definition archive.hpp:47