# 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