+ * hb_reduce
+ **********************************************************************
+ * Given a numerator (num) and a denominator (den), reduce them to an
+ * equivalent fraction and store the result in x and y.
+ *********************************************************************/
+void hb_reduce( int *x, int *y, int num, int den )
+{
+ int lower = MIN( num, den );
+ int i;
+ *x = num;
+ *y = den;
+ for( i = lower - 1; i > 1; --i )
+ {
+ if( ( num % i == 0 ) && ( den % i == 0 ) )
+ {
+ *x = num / i;
+ *y = den / i;
+ break;
+ }
+ }
+}
+
+/**********************************************************************