Disk ARchive  2.6.0
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) 2002-2018 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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
are defined here basic integer types that tend to be portable
contains all the excetion class thrown by libdar
this is the interface class from which all other data transfer classes inherit
class archive_num stores the position of an archive inside a dar_manager database ...
Definition: archive_num.hpp:46
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:46