static int make_path(IOHIDDeviceRef device, char *buf, size_t len)
{
int res;
unsigned short vid, pid;
char transport[32];
buf[0] = '\0';
res = get_string_property_utf8(
device, CFSTR(kIOHIDTransportKey),
transport, sizeof(transport));
if (!res)
return -1;
vid = get_vendor_id(device);
pid = get_product_id(device);
res = snprintf(buf, len, "%s_%04hx_%04hx_%p",
transport, vid, pid, device);
buf[len-1] = '\0';
return res+1;
}
static int get_manufacturer_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
{
return get_string_property_utf8(device, CFSTR(kIOHIDManufacturerKey), (char *)buf, len);
}
static int get_product_string(IOHIDDeviceRef device, wchar_t *buf, size_t len)
{
return get_string_property_utf8(device, CFSTR(kIOHIDProductKey), (char *)buf, len);
}
static int get_serial_number(IOHIDDeviceRef device, wchar_t *buf, size_t len)
{
return get_string_property_utf8(device, CFSTR(kIOHIDSerialNumberKey), (char *)buf, len);
}
