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Subject: Re: [geda-user] gnetlist chaos
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From: John Doty <jpd AT noqsi DOT com>
In-Reply-To: <alpine.DEB.2.11.1702122039590.31724@nimbus>
Date: Sun, 12 Feb 2017 13:24:29 -0700
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On Feb 12, 2017, at 1:01 PM, Roland Lutz <rlutz AT hedmen DOT org> wrote:

> On Sun, 12 Feb 2017, John Doty wrote:
>> On Feb 12, 2017, at 8:19 AM, Roland Lutz <rlutz AT hedmen DOT org> wrote:
>>> If your intention is to have a better Scheme API or a way to invoke =
the netlisting functionality from Scheme, just build on the current =
version of gEDA/gaf.  It allows you to do so really easily.
>>=20
>> Frome a Schemer point of view, the trouble with gnetlist is that the =
actual data structures are hidden behind an FFI. You have a different =
FFI, but that doesn=92t solve the fundamental problem.
>=20
> If you mean from the Scheme side, then it's the same FFI.  If you mean =
from the Python side, then things are really different because both the =
code accessing the netlist data and the netlisting code live in the same =
interpreter.  This means that e.g. a backend has access to *all* the =
information the netlister has; it is basically part of the same thing.
>=20
> Since the Scheme API is separate from the netlist data, you can just =
change it in any way you like, or define your own API and load it into =
the netlister.  You could use xorn/src/python/geda/netlist/guile.py as a =
starting point.
>=20
> Do you have any special information in mind which you would want to =
access?

What Vladimir has been doing is *eliminating* the FFI, so that all of =
the functions and data are Scheme. That makes everything more =
transparent, so your question becomes moot. What you=92ve done is to =
substitute a different opaque data storage layer, so you still need the =
FFI. Maybe better for Pythonians, but Vladimir=92s approach is better =
for Schemers.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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