Please note that there is some error in your port:

Error: roundtrip fail 4.9406564584124654e-324 -> '5.e-309' -> 4.9999999999999995e-309

Error: roundtrip fail 6.6302941479442929e-310 -> '6.6302941479443e-309' -> 6.6302941479442979e-309

Error: roundtrip fail -1.9153028533493997e-310 -> '-1.9153028533494e-309' -> -1.9153028533493997e-309

Error: roundtrip fail -2.5783653320086361e-312 -> '-2.57836533201e-309' -> -2.5783653320099997e-309