func getIntProp(device C.IOHIDDeviceRef, key C.CFStringRef) int32 {
var value int32
ref := C.IOHIDDeviceGetProperty(device, key)
if ref != nil {
if C.CFGetTypeID(ref) == C.CFNumberGetTypeID() {
C.CFNumberGetValue(C.CFNumberRef(ref), C.kCFNumberSInt32Type, unsafe.Pointer(&value))
return value
}
}
return 0
}
func getStringProp(device C.IOHIDDeviceRef, key C.CFStringRef) string {
s := C.IOHIDDeviceGetProperty(device, key)
return gostring(C.CFStringRef(s))
}