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LibJS: Add isFinite()
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3 changed files with 36 additions and 0 deletions
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@ -87,6 +87,7 @@ void GlobalObject::initialize()
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put_native_function("gc", gc);
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put_native_function("isNaN", is_nan, 1);
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put_native_function("isFinite", is_finite, 1);
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// FIXME: These are read-only in ES5
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put("NaN", js_nan());
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@ -141,4 +142,10 @@ Value GlobalObject::is_nan(Interpreter& interpreter)
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return Value(value.is_nan());
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}
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Value GlobalObject::is_finite(Interpreter& interpreter)
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{
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auto value = interpreter.argument(0).to_number();
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return Value(!value.is_infinity() && !value.is_nan());
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}
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}
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