[PATCH 12/20] stkutil: Add the Call Control envelope builder

[Denis Kenzior]

Hi Andrew,


> >> +/* Used both in the ENVELOPE message to UICC and response from UICC */
> >> +struct stk_envelope_call_control {
> >> +     /* Exactly one of the following 5 fields must be present */
> >
> > Why are we not using a union then?
> 
> We don't know which one of 5 is valid if it's a union.  We could add a
> field to indicate that but I guess it's simpler the way it is.

It seems like a type + union might be better for the consumers of this 
structure though.  Otherwise they have to check up to 5 structs for emptiness 
before figuring out what the type actually is.  Your call.

Regards,
-Denis