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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef LZWDecode_H
#define LZWDecode_H
#include <string>
#include "Decoder.h"
#include "FilterPredictor.h"
namespace merge_lib
{
// this class provides method for FlateDecode encoding and decoding
class LZWDecode : public Decoder
{
public:
LZWDecode();
virtual ~LZWDecode();
bool encode(std::string & decoded);
bool decode(std::string & encoded);
void initialize(Object * objectWithStram);
private:
FilterPredictor *_predict;
void clearTable();
int getCode();
std::string _dummy;
std::string &_encoded;
size_t _curSymbolIndex;
int _earlyChange; // early parameter
int _readBuf;
int _readBits;
int _nextCode;
int _bitsToRead;
bool _first;
int _curSequenceLength;
};
}
#endif // LZW_DECODE_H_INCLUDED