Src/Common/round.c

   1 #include <math.h>
   2
   3 /* Unlike round() from libmath, this function rounds up to the highest
   4  * integral value, so round(-1.5)=-1 rather than -2.
   5  * This function tends to be called with positive values, in which case
   6  * the behaviour is the same: round(1.5)=2.
   7  */
   8 double round(double dVal) {
   9   double dF = floor(dVal);
  10   double dC = ceil(dVal);
  11
  12   if(dVal - dF < dC - dVal)
  13     return dF;
  14   else
  15     return dC;
  16 }