al_get_haptic_capabilities - Allegro 5 API

       Returns an integer with or’ed values from ALLEGRO_HAPTIC_CONSTANTS(3alleg5), which, if set, indicate that
       the haptic device supports the given feature.

       al_get_haptic_capabilities - Allegro 5 API

       5.1.8

              [UnstableAPI]:  Perhaps  could be simplified due to limited support for all the exposed features
              across all of the platforms.  Awaiting feedback from users.

Allegro reference manual                                                     al_get_haptic_capabilities(3alleg5)

              #include <allegro5/allegro.h>

              int al_get_haptic_capabilities(ALLEGRO_HAPTIC *hap)