extern void place_random_stairs(int y, int x);
extern void place_random_door(int y, int x, bool room);
-extern void place_closed_door(int y, int x);
+extern void place_closed_door(int y, int x, int type);
extern void place_floor(int x1, int x2, int y1, int y2, bool light);
extern void place_room(int x1, int x2, int y1, int y2, bool light);
extern void vault_monsters(int y1, int x1, int num);
extern bool get_is_floor(int x, int y);
extern void set_floor(int x, int y);
-extern void build_tunnel(int row1, int col1, int row2, int col2);
+extern bool build_tunnel(int row1, int col1, int row2, int col2);
extern bool build_tunnel2(int x1, int y1, int x2, int y2, int type, int cutoff);