🚀 go-pugleaf

bill@twwells.com (T. William Wells) writes:

>The definition for strtoul says that one converts the number (to
>an unsigned long) ignoring the minus sign and then negates it.
>Negation is defined for all values of an unsigned type, resulting
>in ULONG_MAX+1-x, where x is 2, for this case.

I take it that your interpretation is saying that strtoul() is supposed
to return an unsigned integer with the value ULONG_MAX+1-x whenever an
input number has the form of a "-" followed by a properly formed unsigned
quantity.

If the representation given is outside of the range of ULONG_MAX (the part
following the "-", not including it) then ULONG_MAX would be returned.  But
what if such an out of range number is preceeded by a "-"?  Do we return
the value ULONG_MAX+1-ULONG_MAX (which would be just 1) or do we return the
value ULONG_MAX?