string_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 : dar.linux@free.fr
00020 /*********************************************************************/
00021 // $Id: string_file.hpp,v 1.1.2.1 2007/07/22 16:35:00 edrusb Rel $
00022 //
00023 /*********************************************************************/
00024 //
00025 
00029 
00030 #ifndef STRING_FILE_HPP
00031 #define STRING_FILE_HPP
00032 
00033 #include "../my_config.h"
00034 #include "infinint.hpp"
00035 #include "generic_file.hpp"
00036 #include "integers.hpp"
00037 #include "erreurs.hpp"
00038 
00039 namespace libdar
00040 {
00041 
00043 
00045     class string_file : public generic_file
00046     {
00047     public:
00048 
00050         string_file(user_interaction & dialog, const std::string & contents): generic_file(dialog, gf_read_only) { data = contents; cur = 0; len = data.size(); };
00051 
00052             // inherited from generic_file
00053         bool skip(const infinint & pos);
00054         bool skip_to_eof() { cur = len; return true; };
00055         bool skip_relative(S_I x);
00056         infinint get_position() { return cur; };
00057 
00058     protected:
00059             // inherited from generic_file
00060         S_I inherited_read(char *a, size_t size);
00061         S_I inherited_write(const char *a, size_t size) { throw Efeature("Writing on a string_file is not allowed"); };
00062 
00063     private:
00064         std::string data;
00065         infinint cur;
00066         infinint len;
00067     };
00068 
00069 } // end of namespace
00070 
00071 #endif

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