newlib-cygwin/winsup/mingw/mingwex/complex/clog.c

20 lines
329 B
C

/*
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;
}