method

*

Ruby latest stable (v2_5_5) - 0 notes - Class: Complex

*(p1) public

Performs multiplication.

Complex(2, 3)  * Complex(2, 3)   #=> (-5+12i)
Complex(900)   * Complex(1)      #=> (900+0i)
Complex(-2, 9) * Complex(-9, 2)  #=> (0-85i)
Complex(9, 8)  * 4               #=> (36+32i)
Complex(20, 9) * 9.8             #=> (196.0+88.2i)

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VALUE
rb_complex_mul(VALUE self, VALUE other)
{
    if (RB_TYPE_P(other, T_COMPLEX)) {
        VALUE real, imag;
        VALUE areal, aimag, breal, bimag;
        int arzero, aizero, brzero, bizero;

        get_dat2(self, other);

        arzero = f_zero_p(areal = adat->real);
        aizero = f_zero_p(aimag = adat->imag);
        brzero = f_zero_p(breal = bdat->real);
        bizero = f_zero_p(bimag = bdat->imag);
        real = f_sub(safe_mul(areal, breal, arzero, brzero),
                     safe_mul(aimag, bimag, aizero, bizero));
        imag = f_add(safe_mul(areal, bimag, arzero, bizero),
                     safe_mul(aimag, breal, aizero, brzero));

        return f_complex_new2(CLASS_OF(self), real, imag);
    }
    if (k_numeric_p(other) && f_real_p(other)) {
        get_dat1(self);

        return f_complex_new2(CLASS_OF(self),
                              f_mul(dat->real, other),
                              f_mul(dat->imag, other));
    }
    return rb_num_coerce_bin(self, other, '*');
}

*

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