Disk ARchive 2.4.2
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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 // $Id: memory_file.hpp,v 1.12 2011/06/02 13:28:46 edrusb Rel $ 00022 // 00023 /*********************************************************************/ 00024 00028 00029 #ifndef MEMORY_FILE_HPP 00030 #define MEMORY_FILE_HPP 00031 00032 #include "generic_file.hpp" 00033 #include "storage.hpp" 00034 00035 namespace libdar 00036 { 00037 00040 00041 class memory_file : public generic_file 00042 { 00043 public: 00044 00045 // Constructors & Destructor 00046 // 00047 // 00048 00049 memory_file(gf_mode m) : generic_file(m), data(0) { position = 0; }; 00050 00051 // virtual method inherited from generic_file 00052 // 00053 // 00054 00055 bool skip(const infinint & pos); 00056 bool skip_to_eof(); 00057 bool skip_relative(S_I x); 00058 infinint get_position() { if(is_terminated()) throw SRC_BUG; return position; }; 00059 void reset() { if(is_terminated()) throw SRC_BUG; position = 0; data = storage(0); }; 00060 00061 // raw access to stored data 00062 // 00063 // 00064 00066 infinint get_data_size() const { if(is_terminated()) throw SRC_BUG; return data.size(); }; 00067 00069 const storage & get_raw_data() const { if(is_terminated()) throw SRC_BUG; return data; }; 00070 void set_raw_data(const storage & val) { if(is_terminated()) throw SRC_BUG; data = val; position = 0; }; 00071 00072 protected: 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_terminate() {}; 00077 00078 private: 00079 storage data; 00080 infinint position; 00081 }; 00082 00084 00085 } // end of namespace 00086 00087 #endif