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#pragma once
#include "block_item.h"
#include <yql/essentials/public/udf/udf_ptr.h>
#include <yql/essentials/public/udf/udf_type_inspection.h>
#include <yql/essentials/public/udf/udf_type_size_check.h>
namespace NYql::NUdf {
// ABI stable
class IBlockItemComparator {
public:
using TPtr = TUniquePtr<IBlockItemComparator>;
virtual ~IBlockItemComparator() = default;
virtual i64 Compare(TBlockItem lhs, TBlockItem rhs) const = 0;
virtual bool Equals(TBlockItem lhs, TBlockItem rhs) const = 0;
virtual bool Less(TBlockItem lhs, TBlockItem rhs) const = 0;
inline bool Greater(TBlockItem lhs, TBlockItem rhs) const {
return Less(rhs, lhs);
}
};
UDF_ASSERT_TYPE_SIZE(IBlockItemComparator, 8);
template <typename TDerived, bool Nullable>
class TBlockItemComparatorBase : public IBlockItemComparator {
public:
const TDerived* Derived() const {
return static_cast<const TDerived*>(this);
}
// returns <0 if lhs < rhs
i64 Compare(TBlockItem lhs, TBlockItem rhs) const final {
if constexpr (Nullable) {
if (lhs) {
if (rhs) {
return Derived()->DoCompare(lhs, rhs);
} else {
return +1;
}
} else {
if (rhs) {
return -1;
} else {
return 0;
}
}
} else {
return Derived()->DoCompare(lhs, rhs);
}
}
bool Equals(TBlockItem lhs, TBlockItem rhs) const final {
if constexpr (Nullable) {
if (lhs) {
if (rhs) {
return Derived()->DoEquals(lhs, rhs);
} else {
return false;
}
} else {
if (rhs) {
return false;
} else {
return true;
}
}
} else {
return Derived()->DoEquals(lhs, rhs);
}
}
bool Less(TBlockItem lhs, TBlockItem rhs) const final {
if constexpr (Nullable) {
if (lhs) {
if (rhs) {
return Derived()->DoLess(lhs, rhs);
}
else {
return false;
}
} else {
if (rhs) {
return true;
} else {
return false;
}
}
} else {
return Derived()->DoLess(lhs, rhs);
}
}
};
template <typename T, bool Nullable>
class TFixedSizeBlockItemComparator : public TBlockItemComparatorBase<TFixedSizeBlockItemComparator<T, Nullable>, Nullable> {
public:
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
if constexpr (std::is_integral<T>::value && sizeof(T) < sizeof(i64)) {
return i64(lhs.As<T>()) - i64(rhs.As<T>());
} else {
if constexpr (std::is_floating_point<T>::value) {
if (std::isunordered(lhs.As<T>(), rhs.As<T>())) {
return i64(std::isnan(lhs.As<T>())) - i64(std::isnan(rhs.As<T>()));
}
}
return (lhs.As<T>() > rhs.As<T>()) - (lhs.As<T>() < rhs.As<T>());
}
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
if constexpr (std::is_floating_point<T>::value) {
if (std::isunordered(lhs.As<T>(), rhs.As<T>())) {
return std::isnan(lhs.As<T>()) == std::isnan(rhs.As<T>());
}
}
return lhs.As<T>() == rhs.As<T>();
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
if constexpr (std::is_floating_point<T>::value) {
if (std::isunordered(lhs.As<T>(), rhs.As<T>())) {
return std::isnan(lhs.As<T>()) < std::isnan(rhs.As<T>());
}
}
return lhs.As<T>() < rhs.As<T>();
}
};
template <bool Nullable>
class TFixedSizeBlockItemComparator<NYql::NDecimal::TInt128, Nullable> : public TBlockItemComparatorBase<TFixedSizeBlockItemComparator<NYql::NDecimal::TInt128, Nullable>, Nullable> {
public:
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
auto l = lhs.GetInt128();
auto r = rhs.GetInt128();
return (l > r) - (l < r);
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
auto l = lhs.GetInt128();
auto r = rhs.GetInt128();
return l == r;
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
auto l = lhs.GetInt128();
auto r = rhs.GetInt128();
return l < r;
}
};
template <typename TStringType, bool Nullable>
class TStringBlockItemComparator : public TBlockItemComparatorBase<TStringBlockItemComparator<TStringType, Nullable>, Nullable> {
public:
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
return lhs.AsStringRef().Compare(rhs.AsStringRef());
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
return lhs.AsStringRef() == rhs.AsStringRef();
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
return lhs.AsStringRef() < rhs.AsStringRef();
}
};
class TSingularTypeBlockItemComparator: public TBlockItemComparatorBase<TSingularTypeBlockItemComparator, /*Nullable=*/false> {
public:
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
Y_UNUSED(lhs, rhs);
return 0;
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
Y_UNUSED(lhs, rhs);
return true;
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
Y_UNUSED(lhs, rhs);
return false;
}
};
template<typename TTzType, bool Nullable>
class TTzDateBlockItemComparator : public TBlockItemComparatorBase<TTzDateBlockItemComparator<TTzType, Nullable>, Nullable> {
using TLayout = typename TDataType<TTzType>::TLayout;
public:
bool DoCompare(TBlockItem lhs, TBlockItem rhs) const {
const auto x = lhs.Get<TLayout>();
const auto y = rhs.Get<TLayout>();
if (x == y) {
const auto tx = lhs.GetTimezoneId();
const auto ty = rhs.GetTimezoneId();
return (tx == ty) ? 0 : (tx < ty ? -1 : 1);
}
if (x < y) {
return -1;
}
return 1;
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
return lhs.Get<TLayout>() == rhs.Get<TLayout>() && lhs.GetTimezoneId() == rhs.GetTimezoneId();
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
return std::forward_as_tuple(lhs.Get<TLayout>(), lhs.GetTimezoneId()) < std::forward_as_tuple(rhs.Get<TLayout>(), rhs.GetTimezoneId());
}
};
template <bool Nullable>
class TTupleBlockItemComparator : public TBlockItemComparatorBase<TTupleBlockItemComparator<Nullable>, Nullable> {
public:
TTupleBlockItemComparator(TVector<std::unique_ptr<IBlockItemComparator>>&& children)
: Children_(std::move(children))
{}
public:
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
for (ui32 i = 0; i < Children_.size(); ++i) {
auto res = Children_[i]->Compare(lhs.AsTuple()[i], rhs.AsTuple()[i]);
if (res != 0) {
return res;
}
}
return 0;
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
for (ui32 i = 0; i < Children_.size(); ++i) {
if (!Children_[i]->Equals(lhs.AsTuple()[i], rhs.AsTuple()[i])) {
return false;
}
}
return true;
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
for (ui32 i = 0; i < Children_.size(); ++i) {
auto res = Children_[i]->Compare(lhs.AsTuple()[i], rhs.AsTuple()[i]);
if (res < 0) {
return true;
}
if (res > 0) {
return false;
}
}
return false;
}
private:
const TVector<std::unique_ptr<IBlockItemComparator>> Children_;
};
class TExternalOptionalBlockItemComparator : public TBlockItemComparatorBase<TExternalOptionalBlockItemComparator, true> {
public:
TExternalOptionalBlockItemComparator(std::unique_ptr<IBlockItemComparator> inner)
: Inner_(std::move(inner))
{}
i64 DoCompare(TBlockItem lhs, TBlockItem rhs) const {
return Inner_->Compare(lhs.GetOptionalValue(), rhs.GetOptionalValue());
}
bool DoEquals(TBlockItem lhs, TBlockItem rhs) const {
return Inner_->Equals(lhs.GetOptionalValue(), rhs.GetOptionalValue());
}
bool DoLess(TBlockItem lhs, TBlockItem rhs) const {
return Inner_->Less(lhs.GetOptionalValue(), rhs.GetOptionalValue());
}
private:
std::unique_ptr<IBlockItemComparator> Inner_;
};
}
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