#include "lmp_f2c.h"
#undef abs

#include <cmath>

extern "C" {

static double f__cabs(double real, double imag)
{
    double temp;

    if (real < 0) real = -real;
    if (imag < 0) imag = -imag;
    if (imag > real) {
        temp = real;
        real = imag;
        imag = temp;
    }
    if ((real + imag) == real) return (real);

    temp = imag / real;
    temp = real * sqrt(1.0 + temp * temp); /*overflow!!*/
    return (temp);
}

double z_lmp_abs(doublecomplex *z)
{
    return (f__cabs(z->r, z->i));
}
}