--- deliantra/server/include/util.h	2009/10/15 21:09:32	1.91
+++ deliantra/server/include/util.h	2009/10/20 05:57:08	1.92
@@ -216,6 +216,20 @@
   return (int)sqrtf ((float)n);
 }
 
+// this is kind of like the ^^ operator, if it would exist, without sequence point.
+// more handy than it looks like, due to the implicit !! done on its arguments
+inline bool
+logical_xor (bool a, bool b)
+{
+  return a != b;
+}
+
+inline bool
+logical_implies (bool a, bool b)
+{
+  return a <= b;
+}
+
 // this is only twice as fast as naive sqrtf (dx*dy+dy*dy)
 #if 0
 // and has a max. error of 6 in the range -100..+100.