| /** |
| * 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 |