x                  The converted value.
    0                  Indicates that the string starts with an
                       unrecognized wide character or that the value
                       for base is invalid. If the string starts with
                       an unrecognized wide character, *endptr is set
                       to nptr. The function sets errno to EINVAL.
    LONG_MAX or LONG_  Indicates that the converted value would cause
    MIN                a positive or negative overflow, respectively.
                       The function sets errno to ERANGE.