RE: Problem calculating differences

No I didn't try it, I figured you'd get the idea <grin>.


Charles Wilt
--
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Joe Pluta
Sent: Tuesday, April 29, 2008 12:55 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: Problem calculating differences

Wilt, Charles wrote:

Ok Joe,

Here's what I'd do.

results = (%diff(z'1970-01-01-00.00.00': z'2000-01-01-00.00.00'))* 1000
+ (%diff(z'2000-01-01-00.00.00': %timestamp()))*1000;

Did you try it? My guess is it may not work. Also, your version gives
the same timestamp for every message posted within the same second;
effectively, it truncates the milliseconds. I'd prefer to keep them.

Here's what I got to work:

d wEpoch s z static
inz(z'2000-01-01-00.00.00')
d w1 s 30 0
d wMSAdjust c 946684800000

/free
w1 = (%diff( wTime: wEpoch: *mseconds));
return (w1/1000) + wMSAdjust;
/free

This works fine, as wMSAdjust is the number of milliseconds between
01/01/1970 and 01/01/2000. Very similar to what you suggested, although
hardcoding the value.

But here's the interesting bit, and why I said yours might not work.
THIS does not work:

d wEpoch s z static
inz(z'2000-01-01-00.00.00')
d w1 s 30 0
d wMSAdjust c 946684800000

/free
return (%diff( wTime: wEpoch: *mseconds)/1000) + wMSAdjust;
/free

I get an overflow error! Evidently some internal precision deal is
getting blown up. Anyway, I have it now. I'm not going to worry about
it.

Joe
--
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