/
fexpr__mul__.cc
87 lines (72 loc) · 3.17 KB
/
fexpr__mul__.cc
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//------------------------------------------------------------------------------
// Copyright 2020 H2O.ai
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//------------------------------------------------------------------------------
#include "column/func_binary.h"
#include "expr/fbinary/fexpr_binaryop.h"
namespace dt {
namespace expr {
class FExpr__mul__ : public FExpr_BinaryOp {
public:
using FExpr_BinaryOp::FExpr_BinaryOp;
using FExpr_BinaryOp::lhs_;
using FExpr_BinaryOp::rhs_;
std::string name() const override { return "*"; }
int precedence() const noexcept override { return 12; }
Column evaluate1(Column&& lcol, Column&& rcol) const override {
xassert(lcol.nrows() == rcol.nrows());
auto stype1 = lcol.stype();
auto stype2 = rcol.stype();
auto stype0 = common_stype(stype1, stype2);
if (stype1 == SType::VOID || stype2 == SType::VOID) {
return Column::new_na_column(lcol.nrows(), stype0);
}
switch (stype0) {
case SType::BOOL:
case SType::INT8:
case SType::INT16:
case SType::INT32: return make<int32_t>(std::move(lcol), std::move(rcol), SType::INT32);
case SType::INT64: return make<int64_t>(std::move(lcol), std::move(rcol), stype0);
case SType::FLOAT32: return make<float>(std::move(lcol), std::move(rcol), stype0);
case SType::FLOAT64: return make<double>(std::move(lcol), std::move(rcol), stype0);
default:
throw TypeError() << "Operator `*` cannot be applied to columns of "
"types `" << stype1 << "` and `" << stype2 << "`";
}
}
private:
template <typename T>
static Column make(Column&& a, Column&& b, SType stype) {
xassert(compatible_type<T>(stype));
size_t nrows = a.nrows();
a.cast_inplace(stype);
b.cast_inplace(stype);
return Column(new FuncBinary1_ColumnImpl<T, T, T>(
std::move(a), std::move(b),
[](T x, T y){ return (x * y); },
nrows, stype
));
}
};
py::oobj PyFExpr::nb__mul__(py::robj lhs, py::robj rhs) {
return PyFExpr::make(
new FExpr__mul__(as_fexpr(lhs), as_fexpr(rhs)));
}
}} // namespace dt::expr