extern void build_small_room(int x0, int y0);
extern void add_outer_wall(int x, int y, int light, int x1, int y1, int x2, int y2);
extern int dist2(int x1, int y1, int x2, int y2, int h1, int h2, int h3, int h4);
+extern void generate_room_floor(int y1, int x1, int y2, int x2, int light);
+extern void generate_fill_perm_bold(int y1, int x1, int y2, int x2);