[PD-dev] trying to understand class_new

[Christof Ressi]

Hi,

> The code compiles but I get the error when running in the pdint_setup where pdint_new in class_new breaks with an error.
> My idea is to first try to understand the code hence my question:
I think first you should post the error you get ;-) Maybe the problem is 
trivially solved without having to look at  code for class_new() at all.
> What does class_new do?
It creates a new Pd class (t_pd). The class contains all the methods and 
some metadata. It also registers a creator function in pd_objectmaker, 
which is the factory object for all classes.

When you type "[foo 0]" you really send a message "obj <x> <y> foo 0" to 
the canvas, which in turn sends a message "foo 0" to pd_objectmaker, 
which finally returns a newly created instance (given that it can find a 
creator method for "foo").

But again, I think the problem is likely trivial and those 
implementation details shouldn't concern you, unless you want to learn 
about Pd internals, of course :-)

Christof

On 21.03.2020 13:20, Boštjan Jerko wrote:
> Hi,
>
> I’m trying to port libpd to stm32. I don’t need gui so working only on connecting pd script to the output (which is DAC from stm32 in my case).
> The code compiles but I get the error when running in the pdint_setup where pdint_new in class_new breaks with an error.
> My idea is to first try to understand the code hence my question:
> What does class_new do?
>
> My guess is connecting puredata command with a function in C. Am I correct or completely missing the point?
>
> Thanks.
>
> B.
>
>
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