🚀 go-pugleaf

In article <1992Sep30.175835.7972@lucid.com> jss@lucid.com (Jerry Schwarz) writes:
: What is the result of
:
:     strtoul("-2", (char**)0, 10)
:
: The description is clear that the minus sign is allowed.
: The relevant sentence describing the result is.
:
: "If the correct value is outside the range of representable values
: ULONG_MAX is returned ..."
:
: My reading of this is that it requires ULONG_MAX to be returned,
: but others think that -2 is a representable value (equal to
: ULONG_MAX-1) and so ULONG_MAX-1 should be returned.

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.

---
Bill                            { rutgers | decwrl | telesci }!twwells!bill
bill@twwells.com