RE: %OFFSET

[rob@xxxxxxxxx]

(Just back from a week out.)

The offset is for passing a data structure to InfoPrint server.  Seems 
that it wanted this big field and you gave it the offset to the subfields 
within that.  Alas, the problem was as you pointed out - the 2 byte part 
of the length of the variable length field.  I suggested that maybe he 
dump using the data structure and instead use variable length fields, 
eval's, %trim, or whatever else was necessary to put them into a non 
varying length field.

Rob Berendt
-- 
"They that can give up essential liberty to obtain a little temporary 
safety deserve neither liberty nor safety." 
Benjamin Franklin 





"Jon Paris" <Jon.Paris@xxxxxxxxxxxxxx>
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
09/06/2003 03:06 PM
Please respond to RPG programming on the AS400 / iSeries
 
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 >> If I have a datastructure, full of variable length fields, how do I
determine the offset to a particular field?

The varying length fields always occupy the same amount of storage - i.e.
the maximum length + 2.  They are only _treated_ as being variable in 
length
when used.  So to calculate the offset is no different than for a fixed
length field - Addr(VarFieldn) - %Addr(DS).  For the actual data content 
(as
opposed to the length) you need to add 2 to that.

I'm fascinated as to why you want to know the offset.

Jon Paris
Partner400
www.Partner400.com


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