X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;ds=sidebyside;f=advent.h;h=3c3372576b8c9cfdec568b5a296e286e8357a661;hb=a8ac2f477a2564bcf5b40508aea2c192d237c88a;hp=cca1dbab1d328e310643fc1f389639d03444f0c4;hpb=294f2b8a6d0afeb1d209f5cd7baa6509710f0bc0;p=open-adventure.git

diff --git a/advent.h b/advent.h
index cca1dba..3c33725 100644
--- 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
 
+/* 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