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.pc/delete2/header_version.hpp
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 // $Id$
00022 //
00023 /*********************************************************************/
00024 
00025 #ifndef HEADER_VERSION_HPP
00026 #define HEADER_VERSION_HPP
00027 
00028 #pragma interface
00029 
00030 #include "generic_file.hpp"
00031 #include "tools.hpp"
00032 
00033 #define VERSION_FLAG_SAVED_EA_ROOT 0x80
00034 #define VERSION_FLAG_SAVED_EA_USER 0x40
00035 #define VERSION_FLAG_SCRAMBLED     0x20
00036 
00037 #define VERSION_SIZE 3
00038 typedef char version[VERSION_SIZE];
00039 extern void version_copy(version & left, const version & right);
00040 extern bool version_greater(const version & left, const version & right);
00041     // operation left > right
00042 
00043 struct header_version
00044 {
00045     version edition;
00046     char algo_zip;
00047     string cmd_line;
00048     unsigned char flag; // added at edition 02
00049     
00050     void read(generic_file &f) 
00051         { 
00052             f.read(edition, sizeof(edition)); 
00053             f.read(&algo_zip, sizeof(algo_zip)); 
00054             tools_read_string(f, cmd_line); 
00055             if(version_greater(edition, "01"))
00056                 f.read((char *)&flag, (size_t)1);
00057             else
00058                 flag = 0;
00059         };
00060     void write(generic_file &f) 
00061         { 
00062             f.write(edition, sizeof(edition)); 
00063             f.write(&algo_zip, sizeof(algo_zip)); 
00064             tools_write_string(f, cmd_line);
00065             f.write((char *)&flag, (size_t)1);
00066         };
00067 };
00068 
00069 #endif
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