Re: Permissions of IFS file created with QZRUCLSP

Oh, I see.  So I infer that it would be (would have been?) possible to design QZRUCLSP to properly handle optionally-passed parameters by careful placement of those parms presented to the procedure.  But it would likely not be possible to influence a program without such design in such a way that the stars line up for that call.

Finally the documentation line makes sense: "The API does not support calling procedures that have been defined using #pragma artopt"

So no defect at all.  Thanks everyone.  This is what I had missed.

"Barbara Morris" <[email protected]> wrote:

>On 3/18/2011 9:38 AM, Dennis wrote:
>> Ah, that sheds some light!  Since we have no (apparent) means of
>> telling QZRUCLSP that certain parameters are optional but passed, it
>> seems unlikely that it would be capable of guessing the correct means
>> of passing same.
>>
>> Probably a moot point, but is the "differently" part of your message
>> a trade/business/compiler secret?
>
>It's more that I don't know all the details since it's mostly 
>transparent to the compilers.  The compilers just tell the optimizating
>
>translator that the called function has optional parameters.
>
>I do know that for a "..." C function, the function would use the 
>va_list mechanism to access optional parameters.  This requires that
>the 
>optional parameters be contiguous in storage, so parameter 3 follows 
>parameter 2 in storage, at a fixed offset away.  When there are no 
>optional parameters, the system can pass the parameters in whatever way
>
>makes the most sense.  So the location of parameter 3 can't be
>predicted 
>from the location of parameter 2.
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