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Abstract out some state arithmetic.
[open-adventure.git]
/
advent.h
diff --git
a/advent.h
b/advent.h
index cca1dbab1d328e310643fc1f389639d03444f0c4..3c3372576b8c9cfdec568b5a296e286e8357a661 100644
(file)
--- a/
advent.h
+++ b/
advent.h
@@
-29,6
+29,11
@@
#define STATE_NOTFOUND -1 // 'Not found" state of treasures */
#define STATE_GROUND 0 // After discovered, before messed with
#define STATE_NOTFOUND -1 // 'Not found" state of treasures */
#define STATE_GROUND 0 // After discovered, before messed with
+/* Map a state property value to a negative range, where the object cannot be
+ * picked up but the value can be recovered later. Avoid colliding with -1,
+ * which has its own meaning. */
+#define STASHED(obj) (-1 - game.prop[obj])
+
/*
* MOD(N,M) = Arithmetic modulus
* AT(OBJ) = true if on either side of two-placed object
/*
* MOD(N,M) = Arithmetic modulus
* AT(OBJ) = true if on either side of two-placed object