Disk ARchive 2.7.16
Full featured and portable backup and archiving tool
Loading...
Searching...
No Matches
hide_file.hpp
Go to the documentation of this file.
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 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
34using namespace libdar;
35using namespace std;
36
39
40class hide_file : public generic_file
41{
42public:
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 bool truncatable(const infinint & pos) const override { return false; };
53 virtual infinint get_position() const override;
54
55protected:
56 struct partie
57 {
58 infinint debut, longueur; // debut is the offset in ref file
59 infinint offset; // offset in the resulting file
60 };
61
62 vector <partie> morceau;
63 generic_file *ref;
64
65 virtual void inherited_read_ahead(const infinint & amount) override { ref->read_ahead(amount); };
66 virtual U_I inherited_read(char *a, U_I size) override;
67 virtual void inherited_write(const char *a, size_t size) override;
68 virtual void inherited_truncate(const infinint & pos) override { throw Efeature("truncate a hide file"); };
69 virtual void inherited_sync_write() override {};
70 virtual void inherited_flush_read() override {};
71 virtual void inherited_terminate() override {};
72 virtual void fill_morceau() = 0;
73 // the inherited classes have with this method
74 // to fill the "morceau" variable that defines
75 // the portions
76
77private:
78 U_I pos_index;
79 infinint pos_relicat;
80 bool is_init;
81
82 void init() const;
83};
84
86
87
88#endif
exception used when a requested feature is not (yet) implemented
Definition erreurs.hpp:257
this is the interface class from which all other data transfer classes inherit
void read_ahead(const infinint &amount)
the arbitrary large positive integer class
class generic_file is defined here as well as class fichier
the main file of the libdar API definitions
include macro defined by the configure script and some specific additional ones
libdar namespace encapsulate all libdar symbols
Definition archive.hpp:47