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LibJS: Add support for Math.ceil() and Math.trunc()

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Introduce support for the both of these Math methods.
Math.trunc is implemented in terms of Math.ceil or Math.floor
based on the input value. Added tests as well.
This commit is contained in:
Brian Gianforcaro 2020-04-05 01:35:50 -07:00 • committed by Andreas Kling
parent 4ea71c9571
commit 240a5b5fd7
4 changed files with 66 additions and 0 deletions
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27
Libraries/LibJS/Runtime/MathObject.cpp
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@ -38,8 +38,10 @@ MathObject::MathObject()
put_native_function("random", random);
put_native_function("sqrt", sqrt, 1);
put_native_function("floor", floor, 1);
put_native_function("ceil", ceil, 1);
put_native_function("round", round, 1);
put_native_function("max", max, 2);
put_native_function("trunc", trunc, 1);
put("E", Value(M_E));
put("LN2", Value(M_LN2));
@ -98,6 +100,17 @@ Value MathObject::floor(Interpreter& interpreter)
return Value(::floor(number.as_double()));
}
Value MathObject::ceil(Interpreter& interpreter)
{
if (!interpreter.argument_count())
return js_nan();
auto number = interpreter.argument(0).to_number();
if (number.is_nan())
return js_nan();
return Value(::ceil(number.as_double()));
}
Value MathObject::round(Interpreter& interpreter)
{
if (!interpreter.argument_count())
@ -127,4 +140,18 @@ Value MathObject::max(Interpreter& interpreter)
}
}
Value MathObject::trunc(Interpreter& interpreter)
{
if (!interpreter.argument_count())
return js_nan();
auto number = interpreter.argument(0).to_number();
if (number.is_nan())
return js_nan();
if (number.as_double() < 0)
return MathObject::ceil(interpreter);
return MathObject::floor(interpreter);
}
}