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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_RLEV2UTIL_HH
#define ORC_RLEV2UTIL_HH
#include "RLEv2.hh"
namespace orc {
extern const uint8_t FBSToBitWidthMap[FixedBitSizes::SIZE];
extern const uint8_t ClosestFixedBitsMap[65];
extern const uint8_t ClosestAlignedFixedBitsMap[65];
extern const uint8_t BitWidthToFBSMap[65];
// The input n must be less than FixedBitSizes::SIZE.
inline uint32_t decodeBitWidth(uint32_t n) {
return FBSToBitWidthMap[n];
}
inline uint32_t getClosestFixedBits(uint32_t n) {
if (n <= 64) {
return ClosestFixedBitsMap[n];
} else {
return 64;
}
}
inline uint32_t getClosestAlignedFixedBits(uint32_t n) {
if (n <= 64) {
return ClosestAlignedFixedBitsMap[n];
} else {
return 64;
}
}
inline uint32_t encodeBitWidth(uint32_t n) {
if (n <= 64) {
return BitWidthToFBSMap[n];
} else {
return FixedBitSizes::SIXTYFOUR;
}
}
inline uint32_t findClosestNumBits(int64_t value) {
if (value < 0) {
return getClosestFixedBits(64);
}
uint32_t count = 0;
while (value != 0) {
count++;
value = value >> 1;
}
return getClosestFixedBits(count);
}
inline bool isSafeSubtract(int64_t left, int64_t right) {
return ((left ^ right) >= 0) || ((left ^ (left - right)) >= 0);
}
inline uint32_t RleEncoderV2::getOpCode(EncodingType encoding) {
return static_cast<uint32_t >(encoding << 6);
}
}
#endif //ORC_RLEV2UTIL_HH
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