| Disk ARchive 2.6.12 Full featured and portable backup and archiving tool

hide_file.hpp
Go to the documentation of this file.
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
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 : http://dar.linux.free.fr/email.html
20 /*********************************************************************/
21
25
26 #ifndef HIDE_FILE_HPP
27 #define HIDE_FILE_HPP
28
29 #include "../my_config.h"
30 #include <vector>
31 #include "libdar.hpp"
32 #include "generic_file.hpp"
33
34 using namespace libdar;
35 using namespace std;
36
39
40 class hide_file : public generic_file
41 {
42 public:
43 hide_file(generic_file &f);
44 hide_file(const hide_file & ref) = default;
45 hide_file & operator = (const hide_file & ref) = default;
46 ~hide_file() = default;
47
48 virtual bool skippable(skippability direction, const infinint & amount) override { return true; };
49 virtual bool skip(const infinint & pos) override;
50 virtual bool skip_to_eof() override;
51 virtual bool skip_relative(S_I x) override;
52 virtual infinint get_position() const override;
53
54 protected:
55 struct partie
56 {
57 infinint debut, longueur; // debut is the offset in ref file
58 infinint offset; // offset in the resulting file
59 };
60
61 vector <partie> morceau;
62 generic_file *ref;
63
64 virtual void inherited_read_ahead(const infinint & amount) override { ref->read_ahead(amount); };
65 virtual U_I inherited_read(char *a, U_I size) override;
66 virtual void inherited_write(const char *a, size_t size) override;
67 virtual void inherited_sync_write() override {};
68 virtual void inherited_flush_read() override {};
69 virtual void inherited_terminate() override {};
70
71 virtual void fill_morceau() = 0;
72 // the inherited classes have with this method
73 // to fill the "morceau" variable that defines
74 // the portions
75
76 private:
77 U_I pos_index;
78 infinint pos_relicat;
79 bool is_init;
80
81 void init() const;
82 };
83
85
86
87 #endif
libdar::infinint
the arbitrary large positive integer class
Definition: real_infinint.hpp:62
generic_file.hpp
class generic_file is defined here as well as class fichier
libdar::generic_file::read_ahead
void read_ahead(const infinint &amount)
libdar::generic_file
this is the interface class from which all other data transfer classes inherit
Definition: generic_file.hpp:77
libdar.hpp
the main file of the libdar API definitions
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47