freebsd-dev/contrib/libf2c/libF77/c_log.c
2003-07-11 03:42:19 +00:00

14 lines
219 B
C

#include "f2c.h"
#undef abs
#include "math.h"
extern double f__cabs (double, double);
void
c_log (complex * r, complex * z)
{
double zi, zr;
r->i = atan2 (zi = z->i, zr = z->r);
r->r = log (f__cabs (zr, zi));
}