Method update

src/SFML/Window/NetBSD/JoystickImpl.cpp:302–349

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
JoystickState JoystickImpl::JoystickImpl::update()
{
    while (read(m_file, m_buffer.data(), m_length) == m_length)
    {
        hid_data_t data = hid_start_parse(m_desc, 1 << hid_input, m_id);

        // No memory?
        if (!data)
            continue;

        std::size_t buttonIndex = 0;
        hid_item_t  item;

        while (hid_get_item(data, &item))
        {
            if (item.kind == hid_input)
            {
                int usage = HID_USAGE(item.usage);

                if (usage == HUP_BUTTON)
                {
                    m_state.buttons[buttonIndex++] = hid_get_data(m_buffer.data(), &item);
                }
                else if (usage == HUP_GENERIC_DESKTOP)
                {
                    int value = hid_get_data(m_buffer.data(), &item);

                    if (usage == HUG_HAT_SWITCH)
                    {
                        hatValueToSfml(value, m_state);
                    }
                    else if (const std::optional<Joystick::Axis> axis = usageToAxis(usage))
                    {
                        int minimum = item.logical_minimum;
                        int maximum = item.logical_maximum;

                        value               = (value - minimum) * 200 / (maximum - minimum) - 100;
                        m_state.axes[*axis] = value;
                    }
                }
            }
        }

        hid_end_parse(data);
    }

    return m_state;
}

} // namespace sf::priv