Re: isprint() and isgraph() in RPG

[Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>]

isprint() and isgraph() are implemented as macros (or inlined functions 
if __cplusplus_nomacro__ is defined) in ILE C.  Therefore, you won't be 
able to call them directly from RPG.

You could, of course, write a subprocedure that does the same thing as 
the macro...

Dennis Lovelady wrote:
> I am trying to implement a test for valid (printable, in this case)
> characters in RPG.  If I were doing this in C, it would be simple:
>
>     If (isprint(c)) { do_stuff(c) ; }
>
>  
>
> Similar things can be done with isgraph().
>
>  
>
> Nearest I can remember, the prototype for isprint in C is:
>
>    int isprint(int c)
>
>  
>
> Now to define this in RPG, I would have expected to do: (Columns not aligned
> properly)
>
>  
>
> D  isprint         PR    10I 0   EXTPROC('isprint')
>
> D    c                   10I 0   Value
>
>  
>
> I tried with an indicator as output, with a character as input, and various
> permutations of similar combinations, and have not landed on an RPG solution
> that seems to work like I expect.  Do any of you know the correct
> translation of these functions for definition within RPG?  
>
>  
>
> Dennis E. Lovelady
> AIM: delovelady      MSN: fastcounter@xxxxxxxxxxxx
>  <http://www.linkedin.com/in/dennislovelady>
> www.linkedin.com/in/dennislovelady --
> Why is the alphabet in that order?  Is it because of that song? 
>
>