Re: [Nmh-workers] Compiler warnings and signed vs. unsigned char, again

[David Levine]

> >It would solve the warning, but not the bug in the code, which is
> >the missing explicit cast to int required to match the is* function
> >prototype.
> 
> Is that required?  Won't the prototypes for the is* functions take
> care of it?

No and yes.  Cast of any char flavor to an int is not
required because a char can be promoted to an int.  The
problem is sign extension when a signed char is promoted to
an int.  Combined with char being able to be signed.
Compounded by char being able to not be signed, so the
compiler might not always notice.

David