ilogb function

int ilogb(
  1. double x
)

Implementation

int ilogb(double x) {
  if (x == 0) return FP_ILOGB0;
  if (x.isNaN) return FP_ILOGBNAN;
  if (x.isInfinite) return 0x7fffffff;
  List<int> e = [0];
  frexp(x, e);
  return e[0] - 1;
}