🚀 go-pugleaf

In article <4h75a2$4l6@solutions.solon.com>,
J. Kanze <kanze@gabi-soft.fr> wrote:
[...]

>The real portability problem is what will happen on a machine where
>sizeof( int ) == sizeof( char ).  And if INT_MAX == CHAR_MAX.  To tell
>the truth, I'm not even sure what the standard says about this: getchar
>returns an int in the range of 0...UCHAR_MAX, but UCHAR_MAX won't fit in
>an int.
>
>No matter what the standard says, getting the end condition of the
>output loop right is going to be tricky, since UCHAR_MAX + 1 == 0.
>Thus:
>
>	for ( i = 0 ; i < UCHAR_MAX + 1 ; i ++ )
>
>doesn't execute the loop at all, and
>
>	for ( i = 0 ; i <= UCHAR_MAX ; i ++ )
>
>is an infinite loop.

Perhaps this should be merged with the (IMHO rather silly) thread on
using or not using break within loops.

	for ( i = 0 ; ; i ++ ) {
	    /* stuff */
	    if ( i == UCHAR_MAX )
		break;
	    }

fits the bill just fine.  And now we don't even have to try and figure
out whether i overflowing causes undefined behaviour or not.

Cheers,
Stan.
--
Stan Ryckman  (stanr@tiac.net) (new e-mail address)