Re: Vendor call returns up to 200 varying parms back, looking for easy way to scan it all.

The system will allocate 32 bytes of memory for a parameter, unless you type more than that. So if you type less than 1001 (with the two bytes for length added), but more than 32, it'll allocate whatever you type.

If the allocation is shorter than the program expects, then you'd get whatever happened to be adjacent in memory as part of your data.

If the program receiving the parameter does not change the length, then it's possible that you only need the amount specified in the length bytes... (In this case, CONST should also be specified on the prototype to ensure that the program doesn't try to change the data.)

To get a larger command-line, you can type 'CALL QCMD' and then hit F11. I have not checked to see if that's large enough for a full-length hex parameter, though. :-)


On 7/2/2014 3:43 PM, John Yeung wrote:

On Wed, Jul 2, 2014 at 4:22 PM, Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx> wrote:

Well, you COULD call from the command line, it'd just be very awkward :-)
You'd have to give the parameter in hex, using the first 2 bytes as the
length, and then providing (at least) 999 characters (since it's in hex,
that'd be 1998 hex digits) to force the field length to 999.

Hmm... what happens if you don't fill up the 999 characters? Is it an
error, or do you just get whatever happens to be in memory for the
remainder (which I guess would be OK if your initial 2 bytes specified
a small enough length)? If you're in 80-column mode, the whole screen
doesn't even have room to complete one hex parameter. :)

John Y.