tronc.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 : dar.linux@free.fr
00020 /*********************************************************************/
00021 // $Id: tronc.hpp,v 1.9.4.1 2007/07/22 16:35:00 edrusb Rel $
00022 //
00023 /*********************************************************************/
00024 
00030 
00031 #ifndef TRONC_HPP
00032 #define TRONC_HPP
00033 
00034 #include "../my_config.h"
00035 #include "infinint.hpp"
00036 #include "generic_file.hpp"
00037 
00038 namespace libdar
00039 {
00040 
00042 
00043     class tronc : public generic_file
00044     {
00045     public :
00047 
00052         tronc(user_interaction & dialog, generic_file *f, const infinint &offset, const infinint &size);
00053         tronc(user_interaction & dialog, generic_file *f, const infinint &offset, const infinint &size, gf_mode mode);
00054 
00056         bool skip(const infinint & pos);
00058         bool skip_to_eof();
00060         bool skip_relative(S_I x);
00062         infinint get_position() { return current; };
00063 
00064     protected :
00066         S_I inherited_read(char *a, size_t size);
00068         S_I inherited_write(const char *a, size_t size);
00069 
00070     private :
00071         infinint start, sz;
00072         generic_file *ref;
00073         infinint current;
00074     };
00075 
00076 } // end of namespace
00077 
00078 #endif

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