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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.
*/
#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
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