Function sdl2_sys::SDL_GameControllerMappingForDeviceIndex

pub unsafe extern "C" fn SDL_GameControllerMappingForDeviceIndex(
    joystick_index: c_int
) -> *mut c_char

Get the mapping of a game controller. This can be called before any controllers are opened.

\return the mapping string. Must be freed with SDL_free(). Returns NULL if no mapping is available