#ifdef __cplusplus
extern "C" {
#endif
#include "lmp_f2c.h"
int dlas2_(doublereal *f, doublereal *g, doublereal *h__, doublereal *ssmin, doublereal *ssmax)
{
    doublereal d__1, d__2;
    double sqrt(doublereal);
    doublereal c__, fa, ga, ha, as, at, au, fhmn, fhmx;
    fa = abs(*f);
    ga = abs(*g);
    ha = abs(*h__);
    fhmn = min(fa, ha);
    fhmx = max(fa, ha);
    if (fhmn == 0.) {
        *ssmin = 0.;
        if (fhmx == 0.) {
            *ssmax = ga;
        } else {
            d__1 = min(fhmx, ga) / max(fhmx, ga);
            *ssmax = max(fhmx, ga) * sqrt(d__1 * d__1 + 1.);
        }
    } else {
        if (ga < fhmx) {
            as = fhmn / fhmx + 1.;
            at = (fhmx - fhmn) / fhmx;
            d__1 = ga / fhmx;
            au = d__1 * d__1;
            c__ = 2. / (sqrt(as * as + au) + sqrt(at * at + au));
            *ssmin = fhmn * c__;
            *ssmax = fhmx / c__;
        } else {
            au = fhmx / ga;
            if (au == 0.) {
                *ssmin = fhmn * fhmx / ga;
                *ssmax = ga;
            } else {
                as = fhmn / fhmx + 1.;
                at = (fhmx - fhmn) / fhmx;
                d__1 = as * au;
                d__2 = at * au;
                c__ = 1. / (sqrt(d__1 * d__1 + 1.) + sqrt(d__2 * d__2 + 1.));
                *ssmin = fhmn * c__ * au;
                *ssmin += *ssmin;
                *ssmax = ga / (c__ + c__);
            }
        }
    }
    return 0;
}
#ifdef __cplusplus
}
#endif