Panda3D
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00001 // Filename: extractor.h 00002 // Created by: mike (09Jan97) 00003 // 00004 //////////////////////////////////////////////////////////////////// 00005 // 00006 // PANDA 3D SOFTWARE 00007 // Copyright (c) Carnegie Mellon University. All rights reserved. 00008 // 00009 // All use of this software is subject to the terms of the revised BSD 00010 // license. You should have received a copy of this license along 00011 // with this source code in a file named "LICENSE." 00012 // 00013 //////////////////////////////////////////////////////////////////// 00014 #ifndef EXTRACTOR_H 00015 #define EXTRACTOR_H 00016 00017 #include "pandabase.h" 00018 #include "filename.h" 00019 #include "buffer.h" 00020 #include "multifile.h" 00021 #include "pointerTo.h" 00022 #include "vector_int.h" 00023 00024 //////////////////////////////////////////////////////////////////// 00025 // Class : Extractor 00026 // Description : This class automatically extracts the contents of a 00027 // Multifile to the current directory (or to a specified 00028 // directory) in the background. 00029 // 00030 // It is designed to limit its use of system resources 00031 // and run unobtrusively in the background. After 00032 // specifying the files you wish to extract via repeated 00033 // calls to request_subfile(), begin the process by 00034 // calling run() repeatedly. Each call to run() 00035 // extracts another small portion of the Multifile. 00036 // Call run() whenever you have spare cycles until run() 00037 // returns EU_success. 00038 //////////////////////////////////////////////////////////////////// 00039 class EXPCL_PANDAEXPRESS Extractor { 00040 PUBLISHED: 00041 Extractor(); 00042 ~Extractor(); 00043 00044 bool set_multifile(const Filename &multifile_name); 00045 void set_extract_dir(const Filename &extract_dir); 00046 00047 void reset(); 00048 00049 bool request_subfile(const Filename &subfile_name); 00050 int request_all_subfiles(); 00051 00052 int step(); 00053 PN_stdfloat get_progress() const; 00054 00055 bool run(); 00056 00057 private: 00058 Filename _multifile_name; 00059 PT(Multifile) _multifile; 00060 00061 Filename _extract_dir; 00062 00063 typedef vector_int Requests; 00064 Requests _requests; 00065 size_t _requests_total_length; 00066 00067 bool _initiated; 00068 00069 // These are used only while processing. 00070 int _request_index; 00071 int _subfile_index; 00072 size_t _subfile_pos; 00073 size_t _subfile_length; 00074 size_t _total_bytes_extracted; 00075 istream *_read; 00076 pofstream _write; 00077 Filename _subfile_filename; 00078 }; 00079 00080 #include "extractor.I" 00081 00082 #endif