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	Sat, 05 Sep 2015 13:28:45 -0700 (PDT)
Date:	Sat, 5 Sep 2015 23:28:43 +0300
From:	"Vladimir Zhbanov (vzhbanov AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] gschem question about internals
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On Sat, Sep 05, 2015 at 05:57:59PM +0200, gedau AT igor2 DOT repo DOT hu wrote:
> Hi all,
> 
> is there any cache or data structure gschem or libgeda builds from pin
> names? Something I could refer to if I wanted to find U1-2 (refdes is U1,
> pin is U2) fast.
> 
> TIA,
> 
> Igor2
> 

Hi, Igor.

All objects have the same type OBJECT (struct st_object) defined in
libgeda/include/libgeda/struct.h. It has pointers to "substructures".
The substructure for components is COMPLEX, for pins it is LINE in
essence. The struct COMPLEX (st_complex) has a member named prim_objs
which is a list of component primitives. Text objects are attributes if
their text is in the form 'name=value'. If an object is an attribute,
the st_object member attached_to shows the object where the attribute is
attached (if it is attached). The lowlevel logic of working with
attributes is in libgeda/src/o_attrib.c.

HTH,
  Vladimir

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