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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
#include <Functions/FunctionFactory.h>
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#include <Functions/FunctionBinaryArithmetic.h>
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namespace DB
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{
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namespace
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{
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template <typename A, typename B>
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struct ModuloOrZeroImpl
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{
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using ResultType = typename NumberTraits::ResultOfModulo<A, B>::Type;
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static const constexpr bool allow_fixed_string = false;
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static const constexpr bool allow_string_integer = false;
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template <typename Result = ResultType>
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static inline Result apply(A a, B b)
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{
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if constexpr (std::is_floating_point_v<ResultType>)
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{
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/// This computation is similar to `fmod` but the latter is not inlined and has 40 times worse performance.
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return ResultType(a) - trunc(ResultType(a) / ResultType(b)) * ResultType(b);
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}
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else
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{
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if (unlikely(divisionLeadsToFPE(a, b)))
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return 0;
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return ModuloImpl<A, B>::template apply<Result>(a, b);
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}
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}
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#if USE_EMBEDDED_COMPILER
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static constexpr bool compilable = false; /// TODO implement the checks
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#endif
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};
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struct NameModuloOrZero { static constexpr auto name = "moduloOrZero"; };
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using FunctionModuloOrZero = BinaryArithmeticOverloadResolver<ModuloOrZeroImpl, NameModuloOrZero>;
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}
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void registerFunctionModuloOrZero(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionModuloOrZero>();
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}
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}
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