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https://github.com/libretro/scummvm.git
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60 lines
1.6 KiB
C++
60 lines
1.6 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef PACKFILE_H
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#define PACKFILE_H
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namespace Common {
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class SeekableReadStream;
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}
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namespace Grim {
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class PackFile : public Common::SeekableReadStream {
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public:
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PackFile(Common::SeekableReadStream *data);
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~PackFile();
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bool err() const;
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void clearErr();
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uint32 read(void *dataPtr, uint32 dataSize);
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bool eos() const;
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int64 pos() const;
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int64 size() const;
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bool seek(int64 offset, int whence = SEEK_SET);
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private:
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Common::SeekableReadStream *_orgStream;
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int32 _offset, _size;
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uint16 *_codeTable;
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const uint32 _kCodeTableSize;
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void createCodeTable(uint32 key);
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void decode(uint8 *data, uint32 size, uint32 start_point);
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static const uint32 _knownOffsets[5];
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};
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} // end of namespace Grim
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#endif
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