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.pc/delete2/ea.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 EA_HPP
00026 #define EA_HPP
00027 
00028 #pragma interface
00029 
00030 #include <vector>
00031 #include <string>
00032 #include "generic_file.hpp"
00033 #include "infinint.hpp"
00034 
00035 enum ea_mode { ea_insert, ea_del }; // for use later
00036 // actually the whole EA list is stored/restored, but
00037 // it could be possible to check which EA have changed to save only thoses
00038 // and also record EA that have been removed.
00039 // the problem is the localisation of EA in the archive, 
00040 // comparison implies retrieving each EA list, which could implies
00041 // reading the whole archive for EA lists. 
00042 // other thing to consider, is the catalogue extraction, it must also contain
00043 // all EA lists. to be able to compare. 
00044 // solution : store the EA lists after the data and before the catalogue.
00045 // to be seen.
00046 //
00047 enum ea_domain { ea_root, ea_user };
00048 
00049 struct ea_entry
00050 {
00051     ea_mode mode;
00052     enum ea_domain domain;
00053     string key, value;
00054 
00055     ea_entry() { mode = ea_insert; domain = ea_user; key = value = ""; };
00056     ea_entry(generic_file & f);
00057 
00058     void dump(generic_file & f) const;
00059 };
00060 
00061 class ea_attributs
00062 {
00063 public:
00064     ea_attributs() { alire = attr.begin(); };
00065     ea_attributs(generic_file & f);
00066     ea_attributs(const ea_attributs & ref);
00067 
00068     void dump(generic_file & f) const;
00069     void add(const ea_entry &x) { attr.push_back(x); };
00070     void reset_read() const;
00071     bool read(ea_entry & x) const;
00072     infinint size() const { return attr.size(); };
00073     void clear() { attr.clear(); alire = attr.begin(); };
00074     bool find(ea_domain dom, const string &key, ea_mode & found_mode, string & found_value) const;
00075     bool diff(const ea_attributs & other, bool check_ea_root, bool check_ea_user) const;
00076     
00077     void check() const {}; // actually empty, but additional checks could be added
00078 
00079 private:
00080     vector<ea_entry> attr;
00081     vector<ea_entry>::iterator alire;
00082 };
00083 
00084 #endif
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