winsup/mingw/mingwex/complex/clog.c


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/*
   clog.c
   Contributed by Danny Smith
   2003-10-20
*/

/* clog (x + I * y) = log (hypot (x, y)) + I * atan2 (y, x) */

#include <math.h>
#include <complex.h>

double complex clog (double complex Z)
{
  double complex Res;
  __real__ Res = log (_hypot (__real__ Z,  __imag__ Z));
  __imag__ Res = carg (Z);
  return Res;
}