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Disk ARchive
2.5.2
Full featured and portable backup and archiving tool
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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 SECU_MEMORY_FILE_HPP 00027 #define SECU_MEMORY_FILE_HPP 00028 00029 #include "generic_file.hpp" 00030 #include "storage.hpp" 00031 00032 namespace libdar 00033 { 00034 00037 00038 class secu_memory_file : public generic_file 00039 { 00040 public: 00041 00043 secu_memory_file(U_I storage_size) : generic_file(gf_read_write), data(storage_size) { position = 0; }; 00044 00045 // memory_storage specific methods 00046 00048 void reset(U_I size) { if(is_terminated()) throw SRC_BUG; position = 0; data.resize(size); }; 00049 00051 infinint get_size() const { return data.get_size(); }; 00052 00054 infinint get_allocated_size() const { return data.get_allocated_size(); }; 00055 00057 void randomize(U_I size) { if(size > data.get_allocated_size()) reset(size); data.randomize(size); }; 00058 00059 00060 // virtual method inherited from generic_file 00061 bool skippable(skippability direction, const infinint & amount) { return true; }; 00062 bool skip(const infinint & pos); 00063 bool skip_to_eof(); 00064 bool skip_relative(S_I x); 00065 infinint get_position() const { if(is_terminated()) throw SRC_BUG; return position; }; 00066 00067 const secu_string & get_contents() const { return data; }; 00068 00069 protected: 00070 00071 // virtual method inherited from generic_file 00072 void inherited_read_ahead(const infinint & amount) {}; 00073 U_I inherited_read(char *a, U_I size); 00074 void inherited_write(const char *a, U_I size); 00075 void inherited_sync_write() {}; 00076 void inherited_flush_read() {}; 00077 void inherited_terminate() {}; 00078 00079 private: 00080 secu_string data; 00081 U_I position; 00082 }; 00083 00085 00086 } // end of namespace 00087 00088 #endif