#define GSTONE(OBJ) ((OBJ) == EMERALD || (OBJ) == RUBY || (OBJ) == AMBER || (OBJ) == SAPPH)
#define FOREST(LOC) CNDBIT(LOC, COND_FOREST)
#define OUTSID(LOC) (CNDBIT(LOC, COND_ABOVE) || FOREST(LOC))
+#define INSIDE(LOC) (!OUTSID(LOC) || LOC == LOC_BUILDING)
#define INDEEP(LOC) ((LOC) >= LOC_MISTHALL && !OUTSID(LOC))
#define BUG(x) bug(x, #x)
+
#define MOTION_WORD(n) ((n) + 0)
#define OBJECT_WORD(n) ((n) + 1000)
#define ACTION_WORD(n) ((n) + 2000)