WIP: Event generic

This branch replaces the former, rather slow isCurrentEventActive query by a faster implementation based on large integer division using base 1200.

src/int_div.c

@@ -10,6 +10,7 @@
                 Electrical Engineering and Computer Science Technical Reports. 166.
 */
 #include "int_div.h"
+#include <stdio.h>
 
 const int   Fail      = -1;
 const t_int iZero     = (t_int) 0;
@@ -216,6 +217,7 @@ int divide_timespan(const t_int days1, const t_int day_fraction1,
   t_number p1, p2, q, r; /* dividend, divisor, quotient, remainder */
   t_int    qd = 0, rd = 0;
 
+  if ((day_fraction1 > msecs_day) || (day_fraction2 > msecs_day))  printf("Fail 1\n");
   if ((day_fraction1 > msecs_day) || (day_fraction2 > msecs_day))  return Fail;
 
   convert_basis(day_fraction1 * (t_int) 20, &p1, 2, 0);