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hide_file.hpp
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1 /*********************************************************************/
2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2052 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 #ifndef HIDE_FILE_HPP
27 #define HIDE_FILE_HPP
28
29 #include "../my_config.h"
30 #include <vector>
31 #include "infinint.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
45 bool skippable(skippability direction, const infinint & amount) { return true; };
46 bool skip(const infinint & pos);
47 bool skip_to_eof();
48 bool skip_relative(S_I x);
49 infinint get_position() const;
50
51 protected:
52 struct partie
53 {
54 infinint debut, longueur; // debut is the offset in ref file
55 infinint offset; // offset in the resulting file
56 };
57
58 vector <partie> morceau;
59 generic_file *ref;
60
61 void inherited_read_ahead(const infinint & amount) { ref->read_ahead(amount); };
62 U_I inherited_read(char *a, U_I size);
63 void inherited_write(const char *a, size_t size);
64 void inherited_sync_write() {};
65 void inherited_flush_read() {};
66 void inherited_terminate() {};
67
68 virtual void fill_morceau() = 0;
69 // the inherited classes have with this method
70 // to fill the "morceau" variable that defines
71 // the portions
72
73 private:
74 U_I pos_index;
75 infinint pos_relicat;
76 bool is_init;
77
78 void init() const;
79 };
80
82
83
84 #endif
generic_file.hpp
class generic_file is defined here as well as class fichierthe generic_file interface is widely used ...
std
STL namespace.
libdar::generic_file::read_ahead
virtual void read_ahead(const infinint &amount)
infinint.hpp
switch module to limitint (32 ou 64 bits integers) or infinint
libdar::generic_file
this is the interface class from which all other data transfer classes inherit
Definition: generic_file.hpp:100
libdar::infinint
the arbitrary large positive integer class
Definition: real_infinint.hpp:59
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47