gistfile1.h

    switch (input_event.code) {
        case KEY_RIGHTSHIFT:
        case KEY_LEFTSHIFT:
            kb->shift_mod = input_event.value;
            return;
        case KEY_RIGHTCTRL:
        case KEY_LEFTCTRL:
            /* I don't really care about ctrl chars */
            return;
        case KEY_CAPSLOCK:
            if (input_event.value == 1) {
                if (kb->caps_mod) {
                    kb->caps_mod = 0;
                } else {
                    kb->caps_mod = 1;
                }
            }
            return;
    }