Disk ARchive  2.6.8
Full featured and portable backup and archiving tool
hide_file.hpp
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2 // dar - disk archive - a backup/restoration program
3 // Copyright (C) 2002-2020 Denis Corbin
4 //
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9 //
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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:61
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:76
libdar.hpp
the main file of the libdar API definitions
libdar
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:46