src/misc.cc

   1 #include "misc.hh"
   2 #include "glob.hh"
   3 #include "moment.hh"
   4
   5 #include <math.h>
   6
   7 Moment
   8 wholes(int dur, int dots)
   9 {
  10     if (!dur)
  11         return 0.0;
  12
  13     // stupid Intel: doesn't crash if !dur
  14     Moment f = Rational(1)/Moment(dur);
  15     Moment delta = f;
  16
  17     while (dots--) {
  18         delta /= 2.0;
  19         f += delta;
  20     }
  21     return f;
  22 }
  23 int
  24 intlog2(int d) {
  25     int i=0;
  26     while (!(d&1)) {
  27         d/= 2;
  28         i++;
  29     }
  30     assert(!(d/2));
  31     return i;
  32 }
  33
  34 double
  35 log_2(double x) {
  36     return log(x)  /log(2.0);
  37 }
  38