isprint(3)

[Joerg Sonnenberger]

On Mon, May 02, 2005 at 09:50:57AM -0700, Matthew Dillon wrote:
> 
> :I see the problem. isprint is currently true for:
> :isalnum() || ispunc() || isblank()
> :
> :\t is in isblank(), but it is also a control char. I have to investigate
> :whether it is better to not include blank (only space), split the define
> :into two parts are explicitly mask off cntrl. The first should be allowed
> :by SUS for the POSIX locale, but I have to check it carefully.
> :
> :Joerg
> 
>     It seems to me that the most generic solution is to mask off cntrl.

That means an and more and possible double evalution of the
argument. Actually, it is allowed by SUS to have a control character
as printable. Question is, are there non-tab non-space white spaces, which are
control chars and not graphs?

Joerg