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LibJS: Add Math.atan()

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This commit is contained in:
Andreas Kling 2020-12-08 09:52:33 +01:00
parent fe3963f3d4
commit 63b748642a
4 changed files with 29 additions and 0 deletions
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1
Libraries/LibJS/Runtime/CommonPropertyNames.h
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@ -66,6 +66,7 @@ namespace JS {
P(asIntN) \
P(asUintN) \
P(asinh) \
P(atan) \
P(atanh) \
P(bind) \
P(byteLength) \

15
Libraries/LibJS/Runtime/MathObject.cpp
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@ -62,6 +62,7 @@ void MathObject::initialize(GlobalObject& global_object)
define_native_function(vm.names.clz32, clz32, 1, attr);
define_native_function(vm.names.acosh, acosh, 1, attr);
define_native_function(vm.names.asinh, asinh, 1, attr);
define_native_function(vm.names.atan, atan, 1, attr);
define_native_function(vm.names.atanh, atanh, 1, attr);
define_native_function(vm.names.log1p, log1p, 1, attr);
define_native_function(vm.names.cbrt, cbrt, 1, attr);
@ -290,6 +291,20 @@ JS_DEFINE_NATIVE_FUNCTION(MathObject::asinh)
return Value(::asinh(number.as_double()));
}
JS_DEFINE_NATIVE_FUNCTION(MathObject::atan)
{
auto number = vm.argument(0).to_number(global_object);
if (vm.exception())
return {};
if (number.is_nan() || number.is_positive_zero() || number.is_negative_zero())
return number;
if (number.is_positive_infinity())
return Value(M_PI_2);
if (number.is_negative_infinity())
return Value(-M_PI_2);
return Value(::atan(number.as_double()));
}
JS_DEFINE_NATIVE_FUNCTION(MathObject::atanh)
{
auto number = vm.argument(0).to_number(global_object);

1
Libraries/LibJS/Runtime/MathObject.h
View file

@ -58,6 +58,7 @@ private:
JS_DECLARE_NATIVE_FUNCTION(clz32);
JS_DECLARE_NATIVE_FUNCTION(acosh);
JS_DECLARE_NATIVE_FUNCTION(asinh);
JS_DECLARE_NATIVE_FUNCTION(atan);
JS_DECLARE_NATIVE_FUNCTION(atanh);
JS_DECLARE_NATIVE_FUNCTION(log1p);
JS_DECLARE_NATIVE_FUNCTION(cbrt);

12
Libraries/LibJS/Tests/builtins/Math/Math.atan.js Normal file
View file

@ -0,0 +1,12 @@
test("basic functionality", () => {
expect(Math.atan).toHaveLength(1);
expect(Math.atan(0)).toBe(0);
expect(Math.atan(-0)).toBe(-0);
expect(Math.atan(NaN)).toBeNaN();
expect(Math.atan(-2)).toBeCloseTo(-1.1071487177940904);
expect(Math.atan(2)).toBeCloseTo(1.1071487177940904);
expect(Math.atan(Infinity)).toBeCloseTo(Math.PI / 2);
expect(Math.atan(-Infinity)).toBeCloseTo(-Math.PI / 2);
expect(Math.atan(0.5)).toBeCloseTo(0.4636476090008061);
});