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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 _DECIMAL_UTILS_H
#define _DECIMAL_UTILS_H
#include <boost/multiprecision/cpp_int.hpp>
namespace Drill {
class SlicedByteBuf;
struct DecimalValue
{
DecimalValue() :
m_unscaledValue(0),
m_scale(0)
{
;
}
DecimalValue(int32_t val, int32_t scale) : m_unscaledValue(val), m_scale(scale){ }
DecimalValue(int64_t val, int32_t scale) : m_unscaledValue(val), m_scale(scale){ }
boost::multiprecision::cpp_int m_unscaledValue;
int32_t m_scale;
};
// These functions need not be exported. They are used by the templates that return the DecimalValue class.
DecimalValue getDecimalValueFromByteBuf(SlicedByteBuf& data, size_t startIndex, int nDecimalDigits, int scale, bool truncateScale);
DecimalValue getDecimalValueFromDense(SlicedByteBuf& data, size_t startIndex, int nDecimalDigits, int scale, int maxPrecision, int width);
inline DecimalValue getDecimalValueFromIntermediate(SlicedByteBuf& data, size_t startIndex, int nDecimalDigits, int scale)
{
// In the intermediate representation, we don't pad the scale with zeros. Set truncate to false.
return getDecimalValueFromByteBuf(data, startIndex, nDecimalDigits, scale, false);
}
inline DecimalValue getDecimalValueFromSparse(SlicedByteBuf& data, size_t startIndex, int nDecimalDigits, int scale)
{
// In the sparse representation, we pad the scale with zeroes for ease of arithmetic. Set truncate to true.
return getDecimalValueFromByteBuf(data, startIndex, nDecimalDigits, scale, true);
}
} // namespace Drill
#endif
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