82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file extractor.h
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* @author mike
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* @date 1997-01-09
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*/
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#ifndef EXTRACTOR_H
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#define EXTRACTOR_H
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#include "pandabase.h"
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#include "filename.h"
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#include "buffer.h"
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#include "multifile.h"
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#include "pointerTo.h"
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#include "vector_int.h"
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/**
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* This class automatically extracts the contents of a Multifile to the
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* current directory (or to a specified directory) in the background.
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*
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* It is designed to limit its use of system resources and run unobtrusively
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* in the background. After specifying the files you wish to extract via
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* repeated calls to request_subfile(), begin the process by calling run()
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* repeatedly. Each call to run() extracts another small portion of the
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* Multifile. Call run() whenever you have spare cycles until run() returns
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* EU_success.
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*/
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class EXPCL_PANDA_DOWNLOADER Extractor {
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PUBLISHED:
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Extractor();
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~Extractor();
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bool set_multifile(const Filename &multifile_name);
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void set_extract_dir(const Filename &extract_dir);
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void reset();
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bool request_subfile(const Filename &subfile_name);
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int request_all_subfiles();
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int step();
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PN_stdfloat get_progress() const;
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bool run();
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PUBLISHED:
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MAKE_PROPERTY(progress, get_progress);
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private:
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Filename _multifile_name;
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PT(Multifile) _multifile;
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Filename _extract_dir;
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typedef vector_int Requests;
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Requests _requests;
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size_t _requests_total_length;
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bool _initiated;
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// These are used only while processing.
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int _request_index;
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int _subfile_index;
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size_t _subfile_pos;
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size_t _subfile_length;
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size_t _total_bytes_extracted;
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std::istream *_read;
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pofstream _write;
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Filename _subfile_filename;
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};
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#include "extractor.I"
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#endif
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