IsUnsigned() function?

[Karl Heuer]

In article <3539 at sactoh0.UUCP> jak at sactoh0.UUCP (Jay A. Konigsberg) writes:
>I would bet that they had something like this in mind.
>	#define MASK 10000000
>	signed(number) long number; {
>	    if(number & MASK) return(FALSE); else return(TRUE);
>	}

If that's what they had in mind, then `return (number >= 0)' is a trivial
solution-- which doesn't depend on the unspecified internal representation of
negative numbers, the number of bits in a long int, or remembering to specify
the correct radix for the bitmask.

Karl W. Z. Heuer (karl at kelp.ima.isc.com or ima!kelp!karl), The Walking Lint