Re: Passing data to a procedure expecting a pointer

I am using Scott's (is a last name REALLY needed?) IFS logic. Long ago
I must have written a wrapper to make it simpler to understand. I
guess I set it up as a pointer when I wrote it. I don't know why
except that is what the write() was expecting.

P WriteBuffer B EXPORT
D WriteBuffer PI 10I 0
D fileDesc 10I 0 VALUE
D buffer * VALUE

D* Local fields
D retField S 10I 0

/free
return write(fd: %addr(buffer):%size(buffer));
/end-free
P WriteBuffer E

Should I be able to change that to a string (assuming it isn't used)
and leave the rest the same? Man I feel rusty on RPG... all this C# is
messing with my RPG skillz. :-(
--
Mike Wills
http://mikewills.me


On Sun, Jun 9, 2013 at 10:45 PM, Alan Campin <alan0307d@xxxxxxxxx> wrote:

The question is why pass a pointer to the data. That is dangerous. You can
pass as a Const or by Reference and the system will pass a pointer to the
data and you can process as an ordinary data variable in the procedure. Is
the data extremely large or something?


On Sun, Jun 9, 2013 at 9:37 PM, Vernon Hamberg <vhamberg@xxxxxxxxxxxxxxx>wrote:

Hi Mike

That is the procedure address - the address of a procedure.

If you need to pass a pointer to a procedure, you can declare the
prototype with a regular variable - that will pass the pointer to the
variable.

But if you absolutely must prototype it as a pointer, then you can use
the %addr() function on a variable.

HTH
Vern

On 6/9/2013 10:24 PM, Mike Wills wrote:

I am creating a file on the IFS. The procedure I am using is expecting
a pointer to the data I am writing. Is that the %paddr() BIF? It has
been so long since I did more advanced RPG that I can't recall.

--
Mike Wills
http://mikewills.me

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