mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 13:40:50 +00:00
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
#include <Functions/FunctionFactory.h>
|
|
#include <Functions/FunctionBinaryArithmetic.h>
|
|
#include <numeric>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
template <typename A, typename B>
|
|
struct GCDImpl
|
|
{
|
|
using ResultType = typename NumberTraits::ResultOfAdditionMultiplication<A, B>::Type;
|
|
|
|
template <typename Result = ResultType>
|
|
static inline Result apply(A a, B b)
|
|
{
|
|
throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<A>::Type(a), typename NumberTraits::ToInteger<B>::Type(b));
|
|
throwIfDivisionLeadsToFPE(typename NumberTraits::ToInteger<B>::Type(b), typename NumberTraits::ToInteger<A>::Type(a));
|
|
return std::gcd(
|
|
typename NumberTraits::ToInteger<Result>::Type(a),
|
|
typename NumberTraits::ToInteger<Result>::Type(b));
|
|
}
|
|
|
|
#if USE_EMBEDDED_COMPILER
|
|
static constexpr bool compilable = false; /// exceptions (and a non-trivial algorithm)
|
|
#endif
|
|
};
|
|
|
|
struct NameGCD { static constexpr auto name = "gcd"; };
|
|
using FunctionGCD = FunctionBinaryArithmetic<GCDImpl, NameGCD, false>;
|
|
|
|
void registerFunctionGCD(FunctionFactory & factory)
|
|
{
|
|
factory.registerFunction<FunctionGCD>();
|
|
}
|
|
|
|
}
|