Is it possible to pass through an array of C pointers to a C function as a single parameter? There i...

# kotlin-native

[napperley]

Is it possible to pass through an array of C pointers to a C function as a single parameter? There is a GTK function which appears to take a array of GtkWidget, here is the definition:

public fun gtk_container_add(container: CValuesRef<GtkContainer>?, widget: CValuesRef<GtkWidget>?): Unit

Would like to add multiple GTK widgets to a GTK container using a single function call. If three or more widgets need to be added to a container then it would be tedious to call the same function multiple times.

[napperley]

Looks as though it isn't possible. Defined a function as a workaround to deal with the GTK API limitation.

[olonho]

per https://developer.gnome.org/gtk3/stable/GtkContainer.html#gtk-container-add this function takes single argument, not an array. cValuesOf wil produce C array.

[napperley]

Can get a bit confusing when seeing CValue, CValues, and CValuesRef, which all look very similar but have subtle differences between them.

[msink]

Array of pointers would be CPointer<CPointerVar<GtkWidget>>

[napperley]

At which point a typealias starts to look like a good option.

[msink]

It just mirrors C typesystem, array of pointers is GtkWidget**.
If IDEA/CLion could show C header instead of useless interop stub - maybe it would be less confusing.

[olonho]

For people who know C :)