--- deliantra/server/include/util.h	2007/01/25 03:54:45	1.36
+++ deliantra/server/include/util.h	2007/02/15 15:43:36	1.37
@@ -47,6 +47,45 @@
 
 template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
 
+// lots of stuff taken from FXT
+
+/* Rotate right. This is used in various places for checksumming */
+//TODO: this sucks, use a better checksum algo
+static inline uint32_t
+rotate_right (uint32_t c)
+{
+  return (c << 31) | (c >> 1);
+}
+
+// Return abs(a-b)
+// Both a and b must not have the most significant bit set
+static inline uint32_t
+upos_abs_diff (uint32_t a, uint32_t b)
+{
+  long d1 = b - a;
+  long d2 = (d1 & (d1 >> 31)) << 1;
+
+  return d1 - d2;               // == (b - d) - (a + d);
+}
+
+// Both a and b must not have the most significant bit set
+static inline uint32_t
+upos_min (uint32_t a, uint32_t b)
+{
+  int32_t d = b - a;
+  d &= d >> 31;
+  return a + d;
+}
+
+// Both a and b must not have the most significant bit set
+static inline uint32_t
+upos_max (uint32_t a, uint32_t b)
+{
+  int32_t d = b - a;
+  d &= d >> 31;
+  return b - d;
+}
+
 // this is much faster than crossfires original algorithm
 // on modern cpus
 inline int