code: public static int floorModulo(
          long value,
          int divisor
      ) {
  
          long ret = (value - divisor * (floorDivide(value, divisor)));
          return (int) ret; // Type-Cast hier wegen modulo-Semantik sicher
  
      }
docs: /*[deutsch]
  <p>Siehe {@link #floorModulo(int, int)}. </p>
  
  @param   value       numerator
  @param   divisor     divisor
  @return  remainder of division (never negative if divisor is positive)