Disk ARchive  2.5.9
Full featured and portable backup and archiving tool
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elastic.hpp
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3 // Copyright (C) 2002-2052 Denis Corbin
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21 
25 
26 #ifndef ELASTIC_HPP
27 #define ELASTIC_HPP
28 
29 #include "../my_config.h"
30 
31 #include "integers.hpp"
32 #include "erreurs.hpp"
33 #include "infinint.hpp"
34 #include "generic_file.hpp"
35 #include "header_version.hpp"
36 
37 
38 namespace libdar
39 {
40 
43 
44 
45  enum elastic_direction { elastic_forward, elastic_backward };
46 
48 
53  class elastic : public on_pool
54  {
55  public:
56  elastic(U_32 size);
57  elastic(const unsigned char *buffer, U_32 size, elastic_direction dir, const archive_version & reading_ver);
58  elastic(generic_file &f, elastic_direction dir, const archive_version & reading_ver);
59 
60  U_32 dump(unsigned char *buffer, U_32 size) const;
61  U_32 get_size() const { return taille; };
62 
63  static U_I max_length() { return (U_I)(254)*254*254*254 - 1; };
64 
65  private:
66  U_32 taille; // max size of elastic buffer is 4GB which is large enough
67 
68  void randomize(unsigned char *a) const;
69  U_I base_from_version(const archive_version & reading_ver) const;
70  unsigned char get_low_mark(const archive_version & reading_ver) const;
71  unsigned char get_high_mark(const archive_version & reading_ver) const;
72  unsigned char get_low_mark() const { return 255; };
73  unsigned char get_high_mark() const { return 254; };
74 
75  };
76 
78 
79 } // end of namespace
80 
81 #endif
are defined here basic integer types that tend to be portable
class generic_file is defined here as well as class fichierthe generic_file interface is widely used ...
the elastic buffer class
Definition: elastic.hpp:53
archive global header/trailer structure is defined here
contains all the excetion class thrown by libdar
switch module to limitint (32 ou 64 bits integers) or infinint
this is the interface class from which all other data transfer classes inherit
class archive_version manages the version of the archive format
libdar namespace encapsulate all libdar symbols
Definition: archive.hpp:47
elastic_direction
Definition: elastic.hpp:45