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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "numeric_sort_blob_writer.h"
#include <vespa/vespalib/util/sort.h>
#include <cmath>
#include <type_traits>
namespace search::attribute {
template <typename T, bool asc>
NumericSortBlobWriter<T, asc>::NumericSortBlobWriter() noexcept
: _best()
{
}
template <typename T, bool asc>
NumericSortBlobWriter<T, asc>::~NumericSortBlobWriter() noexcept = default;
template <typename T, bool asc>
void
NumericSortBlobWriter<T, asc>::candidate(T val)
{
if constexpr (std::disjunction_v<std::is_same<T,float>,std::is_same<T, double>>) {
if (std::isnan(val)) {
return;
}
}
if (_best.has_value()) {
if constexpr (asc) {
if (_best.value() <= val) {
return;
}
} else {
if (_best.value() >= val) {
return;
}
}
}
_best = val;
}
template <typename T, bool asc>
long
NumericSortBlobWriter<T, asc>::write(void *serTo, size_t available)
{
auto dst = static_cast<unsigned char*>(serTo);
if (_best.has_value()) {
if (available < 1 + sizeof(T)) {
return -1;
}
*dst = has_value;
auto ret = vespalib::serializeForSort<vespalib::convertForSort<T, asc>>(_best.value(), dst + 1, available - 1);
return (ret >= 0) ? (ret + 1) : -1;
} else {
if (available < 1) {
return -1;
}
*dst = missing_value;
return 1;
}
}
template class NumericSortBlobWriter<int8_t, true>;
template class NumericSortBlobWriter<int16_t, true>;
template class NumericSortBlobWriter<int32_t, true>;
template class NumericSortBlobWriter<int64_t, true>;
template class NumericSortBlobWriter<float, true>;
template class NumericSortBlobWriter<double, true>;
template class NumericSortBlobWriter<int8_t, false>;
template class NumericSortBlobWriter<int16_t, false>;
template class NumericSortBlobWriter<int32_t, false>;
template class NumericSortBlobWriter<int64_t, false>;
template class NumericSortBlobWriter<float, false>;
template class NumericSortBlobWriter<double, false>;
}
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