| /** |
| * 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. |
| */ |
| |
| #include "RLEv1.hh" |
| #include "RLEv2.hh" |
| #include "orc/Exceptions.hh" |
| |
| namespace orc { |
| |
| RleEncoder::~RleEncoder() { |
| // PASS |
| } |
| |
| RleDecoder::~RleDecoder() { |
| // PASS |
| } |
| |
| std::unique_ptr<RleEncoder> createRleEncoder |
| (std::unique_ptr<BufferedOutputStream> output, |
| bool isSigned, |
| RleVersion version, |
| MemoryPool&, |
| bool alignedBitpacking) { |
| switch (static_cast<int64_t>(version)) { |
| case RleVersion_1: |
| // We don't have std::make_unique() yet. |
| return std::unique_ptr<RleEncoder>(new RleEncoderV1(std::move(output), |
| isSigned)); |
| case RleVersion_2: |
| return std::unique_ptr<RleEncoder>(new RleEncoderV2(std::move(output), |
| isSigned, alignedBitpacking)); |
| default: |
| throw NotImplementedYet("Not implemented yet"); |
| } |
| } |
| |
| std::unique_ptr<RleDecoder> createRleDecoder |
| (std::unique_ptr<SeekableInputStream> input, |
| bool isSigned, |
| RleVersion version, |
| MemoryPool& pool) { |
| switch (static_cast<int64_t>(version)) { |
| case RleVersion_1: |
| // We don't have std::make_unique() yet. |
| return std::unique_ptr<RleDecoder>(new RleDecoderV1(std::move(input), |
| isSigned)); |
| case RleVersion_2: |
| return std::unique_ptr<RleDecoder>(new RleDecoderV2(std::move(input), |
| isSigned, pool)); |
| default: |
| throw NotImplementedYet("Not implemented yet"); |
| } |
| } |
| |
| void RleEncoder::add(const int64_t* data, uint64_t numValues, |
| const char* notNull) { |
| for (uint64_t i = 0; i < numValues; ++i) { |
| if (!notNull || notNull[i]) { |
| write(data[i]); |
| } |
| } |
| } |
| |
| void RleEncoder::writeVslong(int64_t val) { |
| writeVulong((val << 1) ^ (val >> 63)); |
| } |
| |
| void RleEncoder::writeVulong(int64_t val) { |
| while (true) { |
| if ((val & ~0x7f) == 0) { |
| writeByte(static_cast<char>(val)); |
| return; |
| } else { |
| writeByte(static_cast<char>(0x80 | (val & 0x7f))); |
| // cast val to unsigned so as to force 0-fill right shift |
| val = (static_cast<uint64_t>(val) >> 7); |
| } |
| } |
| } |
| |
| void RleEncoder::writeByte(char c) { |
| if (bufferPosition == bufferLength) { |
| int addedSize = 0; |
| if (!outputStream->Next(reinterpret_cast<void **>(&buffer), &addedSize)) { |
| throw std::bad_alloc(); |
| } |
| bufferPosition = 0; |
| bufferLength = static_cast<size_t>(addedSize); |
| } |
| buffer[bufferPosition++] = c; |
| } |
| |
| void RleEncoder::recordPosition(PositionRecorder* recorder) const { |
| uint64_t flushedSize = outputStream->getSize(); |
| uint64_t unflushedSize = static_cast<uint64_t>(bufferPosition); |
| if (outputStream->isCompressed()) { |
| recorder->add(flushedSize); |
| recorder->add(unflushedSize); |
| } else { |
| flushedSize -= static_cast<uint64_t>(bufferLength); |
| recorder->add(flushedSize + unflushedSize); |
| } |
| recorder->add(static_cast<uint64_t>(numLiterals)); |
| } |
| |
| } // namespace orc |