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Date:	Sun, 1 Sep 2013 15:13:57 +0200 (CEST)
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From:	gedau AT igor2 DOT repo DOT hu
Subject:	Re: [geda-user] PCB file format - compatibility suggestion
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On Sun, 1 Sep 2013, Markus Hitter wrote:

> Am 01.09.2013 09:00, schrieb gedau AT igor2 DOT repo DOT hu:
>> I've started a local branch/fork/whatever of PCB to add a few features I
>> need daily. These features required adding new element and pin/pad
>> flags. Mainstream PCB does not understand these flags, and that is
>> expected.
>
> Is it possible these additional flags are interesting for everybody? Or
> are they more like arbitrary notes?


Arbitrary ones. If you want to implement a new feature 
_optionally_ affecting elements, pins, pads, text, lines, etc. in your 
branch, it may end up requiring a new flag. If another branch or release 
of PCB deletes these flags in a load&save cycle, incompatibility between 
such branches are guaranteed.

> Together with some means to edit these flags I'd call this not a hack,
> but a valueable feature. Even if I can't imagine right now, how such
> custom flags might be useful.

In my version:
  - nonetlist flag of an element means the element is not in the netlist 
and should not cause a short (useful for 1206 jumpers - I hated to add 
them on schematics)
  - intconn(g) for pins and pads, representing internal connections of an 
element, which my version of find.c can track (g being an integer group ID)
  - shape(i) for pins to have more polygon shaped pins beyond square and 
octagon

>
> Anyways, patches are always welcome. Here, or better into the Launchpad
> bug tracker. If you feel like you'd prefer to apply them yourselfs, it
> isn't hard to convince DJ Delorie to give you write access to the repo.
> Just ask.

The only patch I could extract is from my svn; if anyone wants to invest 
the time to merge it with current versions (but I based my branch 
on the last stable release, which is like 2 years old), attached. It 
doesn't add an UI for editing those unknown flags. Since this patch was 
for my fork, I did not follow the (inconsistent) whitespace and naming 
conventions of the existing code.

Regards,

Tibor
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