Disk ARchive: archive_version.hpp Source File

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archive_version.hpp
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1/*********************************************************************/
2// dar - disk archive - a backup/restoration program
3// Copyright (C) 2002-2025 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 ARCHIVE_VERSION_HPP
27#define ARCHIVE_VERSION_HPP
28
29#include "../my_config.h"
30
31#include <string>
32
33#include "integers.hpp"
34
35namespace libdar
36{
37
40
41 // no need to dig into this from API
42 class generic_file;
43
45
46 class archive_version
47 {
48 public:
50
56 archive_version(U_16 x = 0, unsigned char fix = 0);
57
58 archive_version(const archive_version & ref) = default;
59 archive_version(archive_version && ref) noexcept = default;
60 archive_version & operator = (const archive_version & ref) = default;
61 archive_version & operator = (archive_version && ref) noexcept = default;
62 ~archive_version() = default;
63
64 bool operator < (const archive_version & ref) const { return value() < ref.value(); };
65 bool operator >= (const archive_version & ref) const { return value() >= ref.value(); };
66 bool operator == (const archive_version & ref) const { return value() == ref.value(); };
67 bool operator != (const archive_version & ref) const { return value() != ref.value(); };
68 bool operator > (const archive_version & ref) const { return value() > ref.value(); };
69 bool operator <= (const archive_version & ref) const { return value() <= ref.value(); };
70
71 void dump(generic_file & f) const;
72 void read(generic_file & f);
73
75 std::string display() const;
76
77 private:
78 U_16 version;
79 unsigned char fix;
80
81 U_I value() const { return (U_I)(version)*256 + fix; };
82 static unsigned char to_digit(unsigned char val);
83 static unsigned char to_char(unsigned char val);
84 };
85
86 extern const archive_version empty_archive_version();
87
89
90} // end of namespace
91
92#endif
libdar::archive_version
class archive_version manages the version of the archive format
Definition archive_version.hpp:47
libdar::archive_version::display
std::string display() const
provides the version information as a human readable string
libdar::archive_version::archive_version
archive_version(U_16 x=0, unsigned char fix=0)
archive_version constructor
libdar::generic_file
this is the interface class from which all other data transfer classes inherit
Definition generic_file.hpp:77
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