Question of Ignorance

[Wayne Throop]

In article <5590 at utzoo.UUCP> henry at utzoo.UUCP (Henry Spencer) writes:
>> ... I recommend using one of the two constructs
>> 
>>     ( longptr == (long *)32 )
>> or  ( (int)longptr == 32 )
>> 
>> which are guaranteed to do what you want ...
>
>Argh, WRONG!!  Turn that "(int)" into "(long)" and I might agree.  You
>have no guarantees that an int is long enough to hold a pointer.

I'm not sure what ANSI C says about pointers fitting into longs, but I
don't think there is any guarantee there either.  If there IS such a
guarantee, It doesn't seem like a good idea, since I know of 
machines upon which pointers don't even fit in longs.  Of course, 
pointers would have a better *chance* of fitting into a long :-).
-- 
Wayne Throop at Data General, RTP, NC
<the-known-world>!mcnc!rti-sel!rtp47!throopw