src/complex/catanh.c

   1 #include "complex_impl.h"
   2
   3 /* atanh = -i atan(i z) */
   4
   5 double complex catanh(double complex z)
   6 {
   7         z = catan(CMPLX(-cimag(z), creal(z)));
   8         return CMPLX(cimag(z), -creal(z));
   9 }