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From: karl AT aspodata DOT se
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] A fileformat library
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Comments: In-reply-to "Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
   message dated "Tue, 05 Jan 2016 19:07:34 +0000."
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Date: Wed,  6 Jan 2016 10:09:53 +0100 (CET)
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Peter Clifton:
...
> Indeed... text representations of floating point numbers take a lot of
> computation to turn into the correct binary machine value.  This is one of
> the main reasons big 3D models in STEP format are slow to load. (There are
> lots of irrational numbers represented in text format, base 10).
> 
> It is very easy to write a fast ASCII to double conversion, but only if you
> make some assumptions and sacrifice accuracy. Doing correct conversion -
> which yields the closest binary floating point number to the decimal
> floating point number described is hard to preform correctly, and time
> consuming.
> 
> Hypothetically, I think the best compromise is a format which has a
> lossless translation between text and binary representations.
...

You can use hex, you don't have to convert it to/from base 10.

Regards,
/Karl Hammar

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