#include "lmp_f2c.h"

extern "C" {

void z_lmp_div(doublecomplex *c, doublecomplex *a, doublecomplex *b)
{
    double ratio, den;
    double abr, abi, cr;

    if ((abr = b->r) < 0.) abr = -abr;
    if ((abi = b->i) < 0.) abi = -abi;
    if (abr <= abi) {
        if (abi == 0) {
            if (a->i != 0 || a->r != 0) abi = 1.;
            c->i = c->r = abi / abr;
            return;
        }
        ratio = b->r / b->i;
        den = b->i * (1 + ratio * ratio);
        cr = (a->r * ratio + a->i) / den;
        c->i = (a->i * ratio - a->r) / den;
    } else {
        ratio = b->i / b->r;
        den = b->r * (1 + ratio * ratio);
        cr = (a->r + a->i * ratio) / den;
        c->i = (a->i - a->r * ratio) / den;
    }
    c->r = cr;
}
}