header.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: header.hpp,v 1.9.2.1 2009/01/24 16:01:16 edrusb Rel $
00022 //
00023 /*********************************************************************/
00024 
00028 
00029 
00030 #ifndef HEADER_HPP
00031 #define HEADER_HPP
00032 
00033 #include "../my_config.h"
00034 #include "infinint.hpp"
00035 #include "generic_file.hpp"
00036 #include "user_interaction.hpp"
00037 
00038 namespace libdar
00039 {
00040     const unsigned int LABEL_SIZE = 10;
00041 
00042     const char FLAG_NON_TERMINAL = 'N';
00043     const char FLAG_TERMINAL = 'T';
00044     const char EXTENSION_NO = 'N';
00045     const char EXTENSION_SIZE = 'S';
00046     const char EXTENSION_TLV = 'T';
00047 
00048     const U_32 SAUV_MAGIC_NUMBER = 123;
00049 
00050     typedef U_32 magic_number;
00051     typedef char label[LABEL_SIZE];
00052 
00053     extern void label_copy(label & left, const label & right);
00054     extern bool header_label_is_equal(const label &a, const label &b);
00055     extern void header_generate_internal_filename(label & ret);
00056 
00057     struct header
00058     {
00059         magic_number magic;
00060         label internal_name;
00061         char flag;
00062         char extension; // extension rules the use of the following fields
00063         infinint size_ext; // if EXTENSION_SIZE
00064 
00065         header();
00066         header(const header & ref) { copy_from(ref); };
00067         struct header & operator = (const header & ref) { copy_from(ref); return *this; };
00068 
00069         void read(generic_file & f);
00070         void write(generic_file & f);
00071         void read(user_interaction & dialog, S_I fd);
00072         void write(user_interaction & dialog, S_I fd);
00073 
00074         static U_I size() { return sizeof(magic_number) + sizeof(label) + 2*sizeof(char); };
00075         void copy_from(const header & ref);
00076     };
00077 
00078 } // end of namespace
00079 
00080 #endif
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