Linus Torvalds wrote:

Yeah, and I agree, that was a mistake. It could have been fixed by making 
EOF be MIN_INT (or any other value outside the range of either "unsigned 
char" or "signed char" - preferably still negative), but there are 
probably programs that depend on it being -1. 

The stupid thing I just posted doesn't care. It happens to return 0 for 
EOF for all cases, but that's a side effect of (a) not doing locales (so 
255 is never printable or alpha) and (b) not even implementing iscntrl().

Given that for isprint() et al are useless for non-ASCII UTF-8 anyway, 
might as well (they are not defined to be able to take wide character 
values.)

	-hpa