Disk ARchive
2.4.5
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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 // $Id$ 00022 // 00023 /*********************************************************************/ 00024 00036 00037 #ifndef ESCAPE_CATALOGUE_HPP 00038 #define ESCAPE_CATALOGUE_HPP 00039 00040 #include "../my_config.h" 00041 00042 #include "catalogue.hpp" 00043 #include "escape.hpp" 00044 00045 namespace libdar 00046 { 00047 00050 00051 class escape_catalogue : public catalogue 00052 { 00053 public: 00054 escape_catalogue(user_interaction & dialog, 00055 const infinint & root_last_modif, 00056 const label & data_name, escape *esc_ptr); 00057 escape_catalogue(user_interaction & dialog, //< user interaction 00058 const archive_version & reading_ver, //< archive format 00059 compression default_algo, //< default compression algorithm 00060 generic_file *data_loc, //< at which layer to read data from 00061 generic_file *ea_loc, //< at which layer to read EA from 00062 escape *esc_ptr, //< the escape layer of the stack 00063 bool lax = false); //< whether to use lax mode 00064 escape_catalogue(const escape_catalogue & ref) : catalogue(ref) { copy_from(ref); }; 00065 const escape_catalogue & operator = (const escape_catalogue &ref); 00066 ~escape_catalogue() { destroy(); }; 00067 00068 // inherited from catalogue 00069 void pre_add(const entree *ref, compressor *compr) const; 00070 void pre_add_ea(const entree *ref, compressor *compr) const; 00071 void pre_add_crc(const entree *ref, compressor *compr) const; 00072 void pre_add_dirty(compressor *compr) const; 00073 void pre_add_ea_crc(const entree *ref, compressor *compr) const; 00074 void pre_add_waste_mark(compressor *compr) const; 00075 void pre_add_failed_mark(compressor *compr) const; 00076 escape *get_escape_layer() const { return esc; }; 00077 00078 void reset_read() const; 00079 void end_read() const; 00080 void skip_read_to_parent_dir() const; 00081 bool read(const entree * & ref) const; 00082 bool read_if_present(std::string *name, const nomme * & ref) const; 00083 void tail_catalogue_to_current_read(); 00084 bool read_second_time_dir() const { return status == ec_detruits; }; 00085 00086 private: 00087 enum state 00088 { 00089 ec_init, //< state in which no one file has yet been searched in the archive 00090 ec_marks, //< state in which we find the next file using escape sequence marks 00091 ec_eod, //< state in which the archive is missing trailing EOD entries, due to user interruption, thus returning EOD in enough number to get back to the root directory 00092 ec_detruits, //< state in which which detruits objects are returned from the catalogue 00093 ec_completed //< state in which the escape_catalogue object is completed and has all information in memory as a normal catalogue 00094 }; 00095 00096 escape *esc; 00097 archive_version x_reading_ver; 00098 compression x_default_algo; 00099 generic_file *x_data_loc; 00100 generic_file *x_ea_loc; 00101 bool x_lax; 00102 std::map <infinint, etoile *> corres; 00103 state status; 00104 catalogue *cat_det; //< holds the final catalogue's detruit objects when no more file can be read from the archive 00105 infinint min_read_offset; //< next offset in archive should be greater than that to identify a mark 00106 infinint depth; //< directory depth of archive being read sequentially 00107 infinint wait_parent_depth; //< ignore any further entry while depth is less than wait_parent_depth. disabled is set to zero 00108 00109 void set_esc(escape *esc_ptr) { if(esc_ptr != NULL) esc = esc_ptr; else throw SRC_BUG; }; 00110 void copy_from(const escape_catalogue & ref); 00111 void destroy(); 00112 void merge_cat_det(); 00113 void reset_reading_process(); 00114 }; 00115 00117 00118 } // end of namespace 00119 00120 #endif