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Re: [gpsd-dev] ntpshmviz

From: Gary E. Miller
Subject: Re: [gpsd-dev] ntpshmviz
Date: Fri, 8 May 2015 19:20:11 -0700

Yo All!

> I was going to go in and fix the precision in ntpshmviz, but I can't
> seem get it to not crash as it is now in git head.  Not being a python
> guy, maybe someone can tell me what is wrong?

Jon Schlueter found the divide by zero, and DrDaemonEye pointed me to
some rounding issues.  ntpshmvis was rounding timespecs to 5 digits after
the decimal point, which is a problem when trying to display data that
has 9 digits after the decimal point.

I applied Jon's patch, changed rounding of 5 to 9, and used Numpy float128
to preserve the full precision of the inputs.  Not being a Python guy
it may be still not quite right, but it seems to work for me, based on 
very limited testing.

So pull and go forth testing.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
        address@hidden  Tel:+1(541)382-8588

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