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Re: Suggested change of ctype.h

On Sat, 13 Jun 2009 20:41:17 +0100
David Laight <> wrote:

> More particularly the domain of all the ctype functions is clearly
> stated in all the documentation as EOF plus the values of 'unsigned char',
> the behaviour (not the result) for other values is 'undefined'.

You got me here. I didn't even know that I should pass unsigned char to
the ctype.h functions. The "int tolower(int c);" man page for example
somehow suggested to me that it would just sign extend the char.

I learned something new again. Thank you!


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