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100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef DRACI_BARCHIVE_H
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#define DRACI_BARCHIVE_H
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#include "common/str.h"
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namespace Draci {
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/**
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* Represents individual files inside the archive.
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*/
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struct BAFile {
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uint16 _compLength; //!< Compressed length (the same as _length if the file is uncompressed)
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uint16 _length; //!< Uncompressed length
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uint32 _offset; //!< Offset of file inside archive
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byte *_data;
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byte _crc;
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byte _stopper; //!< Not used in BAR files, needed for DFW
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/** Releases the file data (for memory considerations) */
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void close(void) {
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delete[] _data;
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_data = NULL;
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}
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};
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class BArchive {
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public:
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BArchive() : _files(NULL), _fileCount(0), _opened(false) {}
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BArchive(const Common::String &path) :
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_files(NULL), _fileCount(0), _opened(false) {
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openArchive(path);
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}
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~BArchive() { closeArchive(); }
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void openArchive(const Common::String &path);
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void closeArchive(void);
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uint16 size() const { return _fileCount; }
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/**
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* Checks whether there is an archive opened. Should be called before reading
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* from the archive to check whether openArchive() succeeded.
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*/
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bool isOpen() const { return _opened; }
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void clearCache();
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BAFile *getFile(unsigned int i) const;
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private:
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// Archive header data
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static const char _magicNumber[];
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static const char _dfwMagicNumber[];
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static const unsigned int _archiveHeaderSize = 10;
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// File stream header data
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static const unsigned int _fileHeaderSize = 6;
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Common::String _path; //!< Path to file
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BAFile *_files; //!< Internal array of files
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uint16 _fileCount; //!< Number of files in archive
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bool _isDFW; //!< True if the archive is in DFW format, false otherwise
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bool _opened; //!< True if the archive is opened, false otherwise
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void openDFW(const Common::String &path);
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BAFile *loadFileDFW(unsigned int i) const;
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BAFile *loadFileBAR(unsigned int i) const;
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};
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} // End of namespace Draci
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#endif // DRACI_BARCHIVE_H
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