Hi Henri -
This is a reflection of Pd's extremely data-hiding programming style - the idea is to keep the structures hidden so that if they are changed it doesn't break stuff.
And yes, it gets awkward in spots - especially because ugen sorting and the like have to have accessor functions that count inlets/outlets and so on.
The way Pd's internal code finds out about connections (in order to draw them for instance) can be seen in the function canvas_drawlines() for example - which uses the functions linetraverser_start() and linetraverser_next() to find them.
cheers Miller
On Tue, Nov 20, 2018 at 04:37:03PM +0000, Henri Augusto Bisognini wrote:
Hi.
I'm starting to dwelve into pd's C side of things. I'm having a really hard time figuring stuff out. (i have mainly experience with more high-level languages like Java, etc)
I'm trying to experiment with some editor features and i've been wandering:
why the _inlet and _outlet structures are defined in m_obj.c instead of m_pd.h ?
This way i can't access the structure members. I'm trying to traverse an t_object's t_outlets linked list but
t_outlet *o = selected_object->te_outlet; o = o->o_next; but this throws me an "dereferencing incomplete type" error since there is no definition for t_outlet inside m_pd.
The same goes for accessing members of t_outconnect for example, but there are two methods that allows you to traverse the connections linked list obj_starttraverseoutlet() (m_imp.h)(m_obj.c) obj_nexttraverseoutlet() (m_imp.h)(m_obj.c) But i couldn't find any method to traverse an t_object's linked list of t_outlets. The only three methods that seems to return t_outlets pointers are
t_outlet *outlet_new(t_object *owner, t_symbol *s) (m_obj.c) t_outlet *canvas_addoutlet(t_canvas *x, t_pd *who, t_symbol *s) (g_graph.c) and t_outlet *voutlet_getit(t_pd *x) (g_io.c) which i currently do not understand but doesn't seem to be what i'm looking for.
How could i traverse from, lets say the g_editor.c file, all the t_inlets and t_outlets of an t_object?
Btw, on a second question, what exactly are vinlets and voutlets?
Cheers, Henri.
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