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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ORC_RLEV1_HH
#define ORC_RLEV1_HH
#include "Adaptor.hh"
#include "RLE.hh"
#include <memory>
namespace orc {
class RleEncoderV1 : public RleEncoder {
public:
RleEncoderV1(std::unique_ptr<BufferedOutputStream> outStream,
bool hasSigned);
~RleEncoderV1() override ;
/**
* Flushing underlying BufferedOutputStream
*/
uint64_t flush() override;
void write(int64_t val) override;
private:
int64_t delta;
bool repeat;
uint64_t tailRunLength;
void writeValues();
};
class RleDecoderV1 : public RleDecoder {
public:
RleDecoderV1(std::unique_ptr<SeekableInputStream> input,
bool isSigned);
/**
* Seek to a particular spot.
*/
void seek(PositionProvider&) override;
/**
* Seek over a given number of values.
*/
void skip(uint64_t numValues) override;
/**
* Read a number of values into the batch.
*/
void next(int64_t* data, uint64_t numValues,
const char* notNull) override;
private:
inline signed char readByte();
inline void readHeader();
inline uint64_t readLong();
inline void skipLongs(uint64_t numValues);
const std::unique_ptr<SeekableInputStream> inputStream;
const bool isSigned;
uint64_t remainingValues;
int64_t value;
const char *bufferStart;
const char *bufferEnd;
int64_t delta;
bool repeating;
};
} // namespace orc
#endif // ORC_RLEV1_HH
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