Re: using the interfaces in ctype.h

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

On 16-Apr-08, at 6:30 PM, Christos Zoulas wrote:
> - cast ctype arguments to unsigned char and not int, otherwise you  
> silence
> the warning but you can still get a core-dump.


If you're talking about the is*() and to*() APIs from libc then that  
doesn't seem to make any sense for a standards compatible program.

The definitions in all of the standards, an in the NetBSD manual  
pages, all request that the parameters for these functions are to be  
passed as (int).

Unfortunately even various NetBSD architectures, at least for some  
releases, are inconsistent in how these interfaces are defined and  
what warnings are given for various usages.  I've had the best luck  
getting the least warnings on a wide variety of platforms by always  
casting to (int) too.

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