freebsd-src/lib/libF77/z_log.c
L Jonas Olsson 09c656ca68 Library for f2c (part 2 of 2)
Obtained from: netlib.att.com
1994-10-26 18:17:41 +00:00

17 lines
305 B
C

#include "f2c.h"
#ifdef KR_headers
double log(), f__cabs(), atan2();
VOID z_log(r, z) doublecomplex *r, *z;
#else
#undef abs
#include "math.h"
extern double f__cabs(double, double);
void z_log(doublecomplex *r, doublecomplex *z)
#endif
{
r->i = atan2(z->i, z->r);
r->r = log( f__cabs( z->r, z->i ) );
}