Disk ARchive  2.6.8
Full featured and portable backup and archiving tool
archive_num.hpp
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1 /*********************************************************************/
2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2020 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
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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 : http://dar.linux.free.fr/email.html
20 /*********************************************************************/
21 
25 
26 
27 #ifndef ARCHIVE_NUM_HPP
28 #define ARCHIVE_NUM_HPP
29 
30 #include "../my_config.h"
31 
32 #include "integers.hpp"
33 #include "erreurs.hpp"
34 
35 namespace libdar
36 {
37 
40 
41  // no need to dig into this class from the API
42  class generic_file;
43 
45 
47  {
48  public:
49  archive_num(U_16 arg = 0) { set(arg); };
50  archive_num(const archive_num & ref) = default;
51  archive_num(archive_num && ref) noexcept = default;
52  archive_num & operator = (const archive_num & ref) = default;
53  archive_num & operator = (archive_num && ref) = default;
54  ~archive_num() = default;
55 
57 
60  operator U_16() const { return val; };
61  U_16 operator = (U_16 arg) { set(arg); return arg; };
62  archive_num & operator++() { set(val+1); return *this; };
63 
64  // no need of order operator (<, <=, >, >=, ==, !=)
65  // thanks to the implicit conversion to U_16 defined
66  // above
67 
68  void read_from_file(generic_file &f);
69  void write_to_file(generic_file &f) const;
70 
71  private:
72  static constexpr U_I val_size = sizeof(U_16);
73  static constexpr U_I MAX = 65534;
74 
75  U_16 val;
76 
77  inline void set(U_16 arg)
78  {
79  if(arg >= MAX)
80  throw SRC_BUG;
81  val = arg;
82  }
83  };
84 
86 
87 } // end of namespace
88 
89 #endif
integers.hpp
are defined here basic integer types that tend to be portable
erreurs.hpp
contains all the excetion class thrown by libdar
libdar::archive_num
class archive_num stores the position of an archive inside a dar_manager database
Definition: archive_num.hpp:46
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:46