Re: Reading Pipe - ASCII -> EBCDIC Conversion

[Barbara Morris <bmorris@xxxxxxxxxx>]

Rory Hewitt wrote:
> As I understand it, if the variable passed has the same length/type as the
> parameter definition, the address of the variable is passed directly; if it
> has a different type or length, it's copied into a temporary variable, whose
> address is passed to the procedure.

That's correct.  Well, almost.  For fixed-length string parameters 
(A,C,G), the address of the variable is also passed if the parameter is 
longer.  And OPTIONS(*VARSIZE) can cause the address of the variable to 
be passed even if the parameter has a shorter length.


> In the second case, I assume that if the called procedure *were* to
> change the parameter, since it would only affect the temporary variable, it
> wouldn't be a problem, whereas in the first case, it *could* affect the
> variable in the calling program. Is this correct?

Yes, that's correct.

> A low-level question then: In the second case (using a temporary variable),
> is the storage for that variable freed immediately after the procedure has
> returned control or what?

Yes.  The temporary could be reused for something else after the 
procedure has returned control.