    const std = @import("std");
    const uefi = std.os.uefi;
    const Event = uefi.Event;
    const Guid = uefi.Guid;
    const Status = uefi.Status;
    const cc = uefi.cc;

    /// Character input devices, e.g. Keyboard
    pub const SimpleTextInputExProtocol = extern struct {
        _reset: *const fn (*const SimpleTextInputExProtocol, bool) callconv(cc) Status,
        _read_key_stroke_ex: *const fn (*const SimpleTextInputExProtocol, *KeyData) callconv(cc) Status,
        wait_for_key_ex: Event,
        _set_state: *const fn (*const SimpleTextInputExProtocol, *const u8) callconv(cc) Status,
        _register_key_notify: *const fn (*const SimpleTextInputExProtocol, *const KeyData, *const fn (*const KeyData) callconv(cc) usize, **anyopaque) callconv(cc) Status,
        _unregister_key_notify: *const fn (*const SimpleTextInputExProtocol, *const anyopaque) callconv(cc) Status,

        /// Resets the input device hardware.
        pub fn reset(self: *const SimpleTextInputExProtocol, verify: bool) Status {
            return self._reset(self, verify);
        }

        /// Reads the next keystroke from the input device.
        pub fn readKeyStrokeEx(self: *const SimpleTextInputExProtocol, key_data: *KeyData) Status {
            return self._read_key_stroke_ex(self, key_data);
        }

        /// Set certain state for the input device.
        pub fn setState(self: *const SimpleTextInputExProtocol, state: *const u8) Status {
            return self._set_state(self, state);
        }

        /// Register a notification function for a particular keystroke for the input device.
        pub fn registerKeyNotify(self: *const SimpleTextInputExProtocol, key_data: *const KeyData, notify: *const fn (*const KeyData) callconv(cc) usize, handle: **anyopaque) Status {
            return self._register_key_notify(self, key_data, notify, handle);
        }

        /// Remove the notification that was previously registered.
        pub fn unregisterKeyNotify(self: *const SimpleTextInputExProtocol, handle: *const anyopaque) Status {
            return self._unregister_key_notify(self, handle);
        }

        pub const guid align(8) = Guid{
            .time_low = 0xdd9e7534,
            .time_mid = 0x7762,
            .time_high_and_version = 0x4698,
            .clock_seq_high_and_reserved = 0x8c,
            .clock_seq_low = 0x14,
            .node = [_]u8{ 0xf5, 0x85, 0x17, 0xa6, 0x25, 0xaa },
        };
    };

    pub const KeyData = extern struct {
        key: InputKey = undefined,
        key_state: KeyState = undefined,
    };

    pub const KeyShiftState = packed struct(u32) {
        right_shift_pressed: bool,
        left_shift_pressed: bool,
        right_control_pressed: bool,
        left_control_pressed: bool,
        right_alt_pressed: bool,
        left_alt_pressed: bool,
        right_logo_pressed: bool,
        left_logo_pressed: bool,
        menu_key_pressed: bool,
        sys_req_pressed: bool,
        _pad: u21 = 0,
        shift_state_valid: bool,
    };

    pub const KeyToggleState = packed struct(u8) {
        scroll_lock_active: bool,
        num_lock_active: bool,
        caps_lock_active: bool,
        _pad: u3 = 0,
        key_state_exposed: bool,
        toggle_state_valid: bool,
    };

    pub const KeyState = extern struct {
        key_shift_state: KeyShiftState,
        key_toggle_state: KeyToggleState,
    };

    pub const InputKey = extern struct {
        scan_code: u16,
        unicode_char: u16,
    };