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memory_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 // $Id: memory_file.hpp,v 1.12 2011/06/02 13:28:46 edrusb Rel $
22 //
23 /*********************************************************************/
24 
28 
29 #ifndef MEMORY_FILE_HPP
30 #define MEMORY_FILE_HPP
31 
32 #include "generic_file.hpp"
33 #include "storage.hpp"
34 
35 namespace libdar
36 {
37 
40 
41  class memory_file : public generic_file
42  {
43  public:
44 
45  // Constructors & Destructor
46  //
47  //
48 
49  memory_file(gf_mode m) : generic_file(m), data(0) { position = 0; };
50 
51  // virtual method inherited from generic_file
52  //
53  //
54 
55  bool skip(const infinint & pos);
56  bool skip_to_eof();
57  bool skip_relative(S_I x);
58  infinint get_position() { if(is_terminated()) throw SRC_BUG; return position; };
59  void reset() { if(is_terminated()) throw SRC_BUG; position = 0; data = storage(0); };
60 
61  // raw access to stored data
62  //
63  //
64 
66  infinint get_data_size() const { if(is_terminated()) throw SRC_BUG; return data.size(); };
67 
69  const storage & get_raw_data() const { if(is_terminated()) throw SRC_BUG; return data; };
70  void set_raw_data(const storage & val) { if(is_terminated()) throw SRC_BUG; data = val; position = 0; };
71 
72  protected:
73  U_I inherited_read(char *a, U_I size);
74  void inherited_write(const char *a, U_I size);
75  void inherited_sync_write() {};
76  void inherited_terminate() {};
77 
78  private:
79  storage data;
80  infinint position;
81  };
82 
84 
85 } // end of namespace
86 
87 #endif