Disk ARchive 2.4.2
hide_file.hpp
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00001 /*********************************************************************/
00002 // dar - disk archive - a backup/restoration program
00003 // Copyright (C) 2002-2052 Denis Corbin
00004 //
00005 // This program is free software; you can redistribute it and/or
00006 // modify it under the terms of the GNU General Public License
00007 // as published by the Free Software Foundation; either version 2
00008 // of the License, or (at your option) any later version.
00009 //
00010 // This program is distributed in the hope that it will be useful,
00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013 // GNU General Public License for more details.
00014 //
00015 // You should have received a copy of the GNU General Public License
00016 // along with this program; if not, write to the Free Software
00017 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00018 //
00019 // to contact the author : http://dar.linux.free.fr/email.html
00020 /*********************************************************************/
00021 // $Id: hide_file.hpp,v 1.18 2011/04/17 13:12:29 edrusb Rel $
00022 //
00023 /*********************************************************************/
00024 
00028 
00029 #ifndef HIDE_FILE_HPP
00030 #define HIDE_FILE_HPP
00031 
00032 #include "../my_config.h"
00033 #include <vector>
00034 #include "infinint.hpp"
00035 #include "generic_file.hpp"
00036 
00037 using namespace libdar;
00038 using namespace std;
00039 
00042 
00043 class hide_file : public generic_file
00044 {
00045 public:
00046     hide_file(generic_file &f);
00047 
00048     bool skip(const infinint & pos);
00049     bool skip_to_eof();
00050     bool skip_relative(S_I x);
00051     infinint get_position();
00052 
00053 protected:
00054     struct partie
00055     {
00056         infinint debut, longueur; // debut is the offset in ref file
00057         infinint offset; // offset in the resulting file
00058     };
00059 
00060     vector <partie> morceau;
00061     generic_file *ref;
00062 
00063     U_I inherited_read(char *a, U_I size);
00064     void inherited_write(const char *a, size_t size);
00065     void inherited_sync_write() {};
00066     void inherited_terminate() {};
00067 
00068     virtual void fill_morceau() = 0;
00069         // the inherited classes have with this method
00070         // to fill the "morceau" variable that defines
00071         // the portions
00072 
00073 private:
00074     U_I pos_index;
00075     infinint pos_relicat;
00076     bool is_init;
00077 
00078     void init();
00079 };
00080 
00082 
00083 
00084 #endif
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