I have some code that needs to be able to parse a string containing a 64-bit value into an int64. For example,
ff11223344556677 is valid, but a downstream system wants that in an
strconv.ParseInt("ff11223344556677", 16, 64) gives a range error - it only likes to parse positive integers. Is there a way to go about putting this value into an int64 even though it is going to be negative?