#include "keyboard.h"
#include "action.h"
-uint16_t layer_switch_stat;
-
-uint16_t layer_switch_stat_get(void);
-void layer_switch_stat_set(uint16_t stat);
-void layer_switch_clear(void);
-void layer_switch_on(uint8_t layer);
-void layer_switch_off(uint8_t layer);
-/* invert state */
-void layer_switch_inv(uint8_t layer);
-void layer_switch_debug(void);
+
+/* overlays are asigned at layer 16-31 */
+#define OVERLAY_BIT 0x10
+#define OVERLAY_MASK 0x0F
+
+
+/*
+ * Default Layer
+ */
+/* base layer to fall back */
+extern uint8_t default_layer;
+void default_layer_set(uint8_t layer);
+
+
+/*
+ * Keymap Layer
+ */
+extern uint16_t keymap_stat;
+/* return current active layer */
+uint8_t keymap_get_layer(void);
+void keymap_clear(void);
+void keymap_set(uint16_t stat);
+void keymap_move(uint8_t layer);
+void keymap_on(uint8_t layer);
+void keymap_off(uint8_t layer);
+void keymap_invert(uint8_t layer);
+/* bitwise operation */
+void keymap_or(uint16_t stat);
+void keymap_and(uint16_t stat);
+void keymap_xor(uint16_t stat);
+void keymap_debug(void);
+
+
+/*
+ * Overlay Layer
+ */
+extern uint16_t overlay_stat;
+/* return current active layer */
+uint8_t overlay_get_layer(void);
+void overlay_clear(void);
+void overlay_set(uint16_t stat);
+void overlay_move(uint8_t layer);
+void overlay_on(uint8_t layer);
+void overlay_off(uint8_t layer);
+void overlay_invert(uint8_t layer);
+/* bitwise operation */
+void overlay_or(uint16_t stat);
+void overlay_and(uint16_t stat);
+void overlay_xor(uint16_t stat);
+void overlay_debug(void);
+
+
+
+/* return action depending on current layer status */
action_t layer_switch_get_action(key_t key);
#endif