Disk ARchive  2.5.2
Full featured and portable backup and archiving tool
label.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 : http://dar.linux.free.fr/email.html
00020 /*********************************************************************/
00021 
00025 
00026 #ifndef LABEL_HPP
00027 #define LABEL_HPP
00028 
00029 #include "../my_config.h"
00030 
00031 #include "integers.hpp"
00032 #include "generic_file.hpp"
00033 #include "on_pool.hpp"
00034 
00035 namespace libdar
00036 {
00037 
00040 
00041     class label : public on_pool
00042     {
00043     public:
00044     label(); // builds a label equal to 'zero'
00045     label(const label & ref) { copy_from(ref); };
00046     const label & operator = (const label & ref) { copy_from(ref); return *this; };
00047 
00048     bool operator == (const label & ref) const;
00049     bool operator != (const label & ref) const { return ! ((*this) == ref); };
00050 
00051     void clear();
00052     bool is_cleared() const;
00053 
00054     void generate_internal_filename();
00055 
00056     void read(generic_file & f);
00057     void dump(generic_file & f) const;
00058 
00059     void invert_first_byte() { val[0] = ~val[0]; };
00060 
00061         // avoid using these two calls, only here for backward compatibility
00062         // where the cost to move to object is really too heavy than
00063         // sticking with an char array.
00064     U_I size() const { return LABEL_SIZE; };
00065     char *data() { return (char *)&val; };
00066     const char *data() const { return (char *)&val; };
00067 
00068     static U_I common_size() { return LABEL_SIZE; };
00069 
00070     private:
00071     static const U_I LABEL_SIZE = 10;
00072 
00073     char val[LABEL_SIZE];
00074 
00075     void copy_from(const label & ref);
00076     };
00077 
00078 
00079     extern const label label_zero;
00080 
00082 
00083 } // end of namespace
00084 
00085 #endif
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