static INT find_joystick_devices(void)
{
static INT joystick_devices_count = -1;
if (joystick_devices_count != -1) return joystick_devices_count;
joystick_devices_count = find_osx_devices();
return joystick_devices_count;
}
/**************************************************************************
* open_joystick
*/
static BOOL open_joystick(joystick_t* joystick)
{
CFIndex index;
CFRange range;
if (joystick->element)
return TRUE;
if (!device_main_elements)
{
find_osx_devices();
if (!device_main_elements)
return FALSE;
}
index = joystick - joysticks;
if (index >= CFArrayGetCount(device_main_elements))
return FALSE;
joystick->element = (IOHIDElementRef)CFArrayGetValueAtIndex(device_main_elements, index);
joystick->buttons = CFArrayCreateMutable(kCFAllocatorDefault, 0, &kCFTypeArrayCallBacks);
collect_joystick_elements(joystick, joystick->element);
/* Sort buttons into correct order */
range.location = 0;
range.length = CFArrayGetCount(joystick->buttons);
CFArraySortValues(joystick->buttons, range, button_usage_comparator, NULL);
if (range.length > 32)
{
/* Delete any buttons beyond the first 32 */
range.location = 32;
range.length -= 32;
CFArrayReplaceValues(joystick->buttons, range, NULL, 0);
}
return TRUE;
}