[Zlib-devel] #elif is not portable on pre-ANSI compilers

[Greg Roelofs]

> I can see that now - so we need unsigned short after all.

That's actually unsigned long on most systems.  Unsigned shorts are
typically 16 bits.

> I wish to add that even the use of 0xff00 should be accompanied by 'U'
> (0xff00U), for the sake of 16-bit platforms. Even if the compiled code
> is still correct, 0xff00 alone is a negative value that might cause
> unnecessary warnings; after all, we are dealing with unsigned values.

'U' is an ANSIism.  I think it's widely supported on non-ANSI compilers,
but I'd bet there are some that don't grok it.

If it ain't broke...

Greg