Re: Inline function definitions for isdigit and isxdigit?

[Joseph Myers <joseph at codesourcery dot com>]

On Fri, 16 Sep 2016, Florian Weimer wrote:

> For isxdigit, C99 and C11 make a final determination that only '0' … '9', 'a'
> … 'f' and 'A' … 'F' are hexadecimal digits.  But POSIX allows more symbolic
> names in the xdigit character class.  Much hand-waving is still required to
> make this C99/C11 compliant because the standard only lists 22 hexadecimal
> digits.  One could perhaps argue that the additional digits introduced by a
> locale are alternative representations of the six letters.

That would indicate to me that a POSIX issue needs to be raised about the 
incompatibility with ISO C.

-- 
Joseph S. Myers
joseph@codesourcery.com