Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Thu, 13 Mar 2003 11:04:36 -0600

Dirk Zimoch wrote:

Hi folks,
some time ago, Timo Korhonen has patched the calcPerform function to
return -1 (=error) if the result of the calculation is nan. This has
been done to raise an INVALID_ALARM and not to process the OUT link if
IVOA="Don't drive outputs". (That required a patch of the calcout
record, too. But that's an other story.)
My question is: should calcPerform return -1 as well if the result is
inf (or -inf) ?
Awaiting your comments,
Dirk

In the latest 3.13 and 3.14 I find

grep isnan *.c
calcPerform.c:        return(((isnan(*presult)||isinf(*presult)) ? -1 : 0));
sCalcPerform.c:        if (isnan(ps->d)) {
sCalcPerform.c:                        if (isnan(*pd)) {
sCalcPerform.c: return(((isnan(*presult)||isinf(*presult)) ? -1 : 0));
Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System