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.pc/delete2/sar.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 SAR_HPP
00026 #define SAR_HPP
00027 
00028 #pragma interface
00029 
00030 #include <string>
00031 #include "generic_file.hpp"
00032 #include "header.hpp"
00033 #include "path.hpp"
00034 #include "integers.hpp"
00035 
00036 #define SAR_OPT_DEFAULT (SAR_OPT_WARN_OVERWRITE)
00037 #define SAR_OPT_WARN_OVERWRITE 0x01
00038 #define SAR_OPT_DONT_ERASE 0x02
00039 #define SAR_OPT_PAUSE 0x04
00040 
00041 class sar : public generic_file
00042 {
00043 public:
00044     sar(const string & base_name, const string & extension, S_I options, const path & dir, const string & execute = "");
00045     sar(const string & base_name, const string & extension, const infinint & file_size, const infinint & first_file_size, S_I options, const path & dir, const string & execute = "");
00046     ~sar();
00047 
00048         // inherited from generic_file
00049     bool skip(const infinint &pos);
00050     bool skip_to_eof();
00051     bool skip_relative(S_I x);
00052     infinint get_position();
00053 
00054         // informational routines
00055     infinint get_sub_file_size() const { return size; };
00056     infinint get_first_sub_file_size() const { return first_size; };
00057     bool get_total_file_number(infinint &num) const { num = of_last_file_num; return of_last_file_known; };
00058     bool get_last_file_size(infinint &num) const { num = of_last_file_size; return of_last_file_known; };
00059 
00060 protected :
00061     S_I inherited_read(char *a, size_t sz);
00062     S_I inherited_write(char *a, size_t sz);
00063 
00064 private :
00065     path archive_dir;
00066     string base, ext;
00067     string hook;
00068     infinint size;
00069     infinint first_size;
00070     infinint first_file_offset;
00071     infinint file_offset;
00072 
00073         // theses following variables are modified by open_file
00074         // else the are used only for reading
00075     infinint of_current;
00076     infinint of_max_seen;
00077     bool of_last_file_known;
00078     infinint of_last_file_num;
00079     infinint of_last_file_size;
00080     label of_internal_name;
00081     fichier *of_fd;
00082     char of_flag;
00083     bool initial;
00084 
00085         // theses are the option flags
00086     bool opt_warn_overwrite;
00087     bool opt_dont_erase;
00088     bool opt_pause;
00089 
00090     bool skip_forward(U_I x);
00091     bool skip_backward(U_I x);
00092     void close_file();
00093     void open_readonly(char *fic, const infinint &num);
00094     void open_writeonly(char *fic, const infinint &num);
00095     void open_file_init();
00096     void open_file(infinint num);
00097     void set_options(S_I opt);
00098     void set_offset(infinint offset);
00099     void open_last_file();
00100     header make_write_header(const infinint &num, char flag);
00101 
00102         // hook to attach a command to execute after each slice
00103     string hook_substitute(const string & path, const string & basename, const string & num);
00104     void hook_execute(const infinint &num);
00105 };
00106 
00107 
00108 class trivial_sar : public generic_file
00109 {
00110 public:
00111     trivial_sar(generic_file *ref); // trivial_sar own the argument
00112     ~trivial_sar() { if(reference != NULL) delete reference; };
00113 
00114     bool skip(const infinint & pos) { return reference->skip(pos + offset); };
00115     bool skip_to_eof() { return reference->skip_to_eof(); };
00116     bool skip_relative(S_I x);
00117     infinint get_position();
00118 
00119 protected:
00120     S_I inherited_read(char *a, size_t size) { return reference->read(a, size); };
00121     S_I inherited_write(char *a, size_t size) { return reference->write(a, size); };
00122     
00123 private:
00124     generic_file *reference;
00125     infinint offset;
00126 };
00127 
00128 extern string sar_make_filename(string base_name, infinint num, string ext);
00129 
00130 #endif
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