Re: [gpsd-dev] ✘cgps

[Fred Wright]

On Thu, 31 Mar 2016, Gary E. Miller wrote:
> On Thu, 31 Mar 2016 14:41:41 -0400
> "Eric S. Raymond" <address@hidden> wrote:
>
> > Gary E. Miller <address@hidden>:
> > > gpsd can send up to 72 channels of skyview, way more than can fit
> > > in the cgps PRN window.  That might be an issue?
> >
> > Could be.  cgps is only supposed to try to display the top...12, I
> > think. You might look to see if the code to trim that list has an
> > off-by-one error.
>
> Gack, much worse than that.  Not limited to window size at all.  Just
> a check to keep frmo running off the end of the list...

Aside from implementing the limit correctly, there's the question of
whether it's time to increase the limit, due to the growth of the overall
GNSS constellation.  Anything that puts lists of satellites in a window
form is affected; this includes cgps, xgps, and gpsmon.

Even just using my GLONASS-capable Android phone as a source *indoors* can
exceed xgps's 20-satellite limit.

Fred Wright