Re: using the interfaces in ctype.h

["Greg A. Woods; Planix, Inc." <woods%planix.ca@localhost>]

On 21-Apr-08, at 10:03 AM, Neil Booth wrote:

> Greg A. Woods; Planix, Inc. wrote:-
>
> > I recommend the following slightly more portable technique for  
> > ctype.h:
> >
> >         #define _CTYPE_MASK     ~(UINT_MAX << CHAR_BIT)
>
> Hoho, if sizeof (char) == sizeof (int).

sizeof(char) is always "1".  Are you suggesting that NetBSD might  
someday run on a CPU with 8-bit ints?  Or pehaps you are suggesting  
that one day NetBSD might run on a 32-bit machine with 32-bit chars?

If the latter then I'm not sure what the problem will be since  
CHAR_BIT will be required to be defined as 32.

Regardless perhaps the mask should be defined as:

        #define _CTYPE_MASK     ~(~0UL << CHAR_BIT)

just to be pedantic.

--
                                        Greg A. Woods; Planix, Inc.
                                        <woods%planix.ca@localhost>