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tlv.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
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9 //
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13 // GNU General Public License for more details.
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19 // to contact the author : http://dar.linux.free.fr/email.html
20 /*********************************************************************/
21 // $Id: tlv.hpp,v 1.2 2009/12/18 10:10:21 edrusb Rel $
22 //
23 /*********************************************************************/
24 
28 
29 #ifndef TLV_HPP
30 #define TLV_HPP
31 
32 #include "memory_file.hpp"
33 #include "storage.hpp"
34 
35 namespace libdar
36 {
39 
41 
44  class tlv
45  {
46  public:
47 
48  // constructors & Co.
49 
50  tlv() { type = 0; value = NULL; };
51  tlv(generic_file & f) { init(f); };
52 
53 
54  // methods (read / write tlv datastructure to file)
55 
56  void read(generic_file & f); //< same as the constructor but on an existing object
57  void write(generic_file & f) const; //< dumps the tlv contents to file
58 
59  // methods to fill the tlv object
60 
61  U_16 get_type() const { return type; }; //< get the TLV type
62  void set_type(U_16 val) { type = val; }; //< set the TLV type
63  void set_contents(const memory_file & contents); //< the generic_file object is provided to dump data to the tlv object
64  void get_contents(memory_file & contents) const; //< the generic_file object is provided to read data from the tlv object
65 
66  private:
67  U_16 type;
68  storage *value;
69 
70  void init(generic_file & f);
71  };
72 
74 
75 } // end of namespace
76 
77 #endif
78 
79