Re: PI to replaced *Entry PLIST (was Because it's there... )

M
Hello Barbara,

You wrote:
>It may work, but I doubt it's actually supported to call a program
>API with a null pointer.  I imagine you're fairly safe the third parm
>of QMHSNDPM, but if you prototype the third parm of QMHSNDPM
>as const, you can pass '' when you have no replacement text.  Even
>better, define a named constant NO_REPLACEMENT_TEXT in your
>qmhsndpm /copy file and code that as the parameter.

As I mentioned earlier I suspect it is a side-effect of QMHSNDPM being written 
properly rather than a supported method.  Still, while it works ... :)

I do prototype the substitution data as CONST (because sometimes one might want 
to pump a literal value or named constant in) -- in fact any INPUT-ONLY 
parameter gets CONST unless I need to take the address using %ADDR in which 
case 
I'd use VALUE (but there are too many restrictions on VALUE to use it all the 
time) however I think I'd use *BLANK rather than '' or a named constant since 
the RPG-supplied figurative constant is just as obvious.

It's a style thing ... I simply prefer using *OMIT rather than *BLANK.  Hmm, a 
question for you:  If the substitution data parameter is defined as 

        D msgDta                32767   CONST OPTIONS(*VARSIZE)

and a *BLANK is passed will RPG IV pass 1 byte or 32767 bytes?  

I can feel an experiment coming on ...

Regards,
Simon Coulter.

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