Argonne National Laboratory

Experimental Physics and
Industrial Control System

2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020 Index 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
<== Date ==> <== Thread ==>

Subject: Re: write to a single element of an array field
From: Ben Franksen via Core-talk <core-talk at aps.anl.gov>
To: EPICS Core Talk <core-talk at aps.anl.gov>
Date: Mon, 23 Mar 2020 01:23:44 +0100
Some of the filter tests appear questionable to me.

test/ioc/db/dbChArrTest.cpp:144 reads:

    const epicsInt32 res_10_4[] = {14,15,16,17,18,19,10,11,12,13};
    TEST1(10, 4, "wrapped", res_10_4);

I find this "wrap around" feature surprising. The array filter
documentation does not mention it.

The reason I am asking about this particular test is, of course, that my
refactor breaks it. I think I could restore the behavior as expressed by
the test but before I do that I wanted to ask if it is really intended
and considered worth keeping.

I should mention that this feature worked only in the dbfl_type_rec case
and not in the case of dbfl_type_ref. This means that if another filter
is run before the array filter, and that filter makes a copy of the
array, then the "wrap around" feature doesn't work anymore.

Cheers
Ben

________________________________

Helmholtz-Zentrum Berlin für Materialien und Energie GmbH

Mitglied der Hermann von Helmholtz-Gemeinschaft Deutscher Forschungszentren e.V.

Aufsichtsrat: Vorsitzender Dr. Volkmar Dietz, stv. Vorsitzende Dr. Jutta Koch-Unterseher
Geschäftsführung: Prof. Dr. Bernd Rech (Sprecher), Prof. Dr. Jan Lüning, Thomas Frederking

Sitz Berlin, AG Charlottenburg, 89 HRB 5583

Postadresse:
Hahn-Meitner-Platz 1
D-14109 Berlin

Attachment: pEpkey.asc
Description: application/pgp-keys


Replies:
Re: write to a single element of an array field Johnson, Andrew N. via Core-talk
References:
Re: write to a single element of an array field Ben Franksen via Core-talk
Re: write to a single element of an array field Ben Franksen via Core-talk
Re: write to a single element of an array field Ben Franksen via Core-talk
Re: write to a single element of an array field Ralph Lange via Core-talk
Re: write to a single element of an array field Ben Franksen via Core-talk
Re: write to a single element of an array field Ben Franksen via Core-talk

Navigate by Date:
Prev: Build failed in Jenkins: epics-base-7.0-win64 #107 APS Jenkins via Core-talk
Next: Re: write to a single element of an array field Johnson, Andrew N. via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
Navigate by Thread:
Prev: Re: write to a single element of an array field Ben Franksen via Core-talk
Next: Re: write to a single element of an array field Johnson, Andrew N. via Core-talk
Index: 2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  <2020
ANJ, 23 Mar 2020 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·