fn lazy_ntt()

in src/rqpoly.rs [171:196]

• 22 lines of code
• 3 McCabe index (conditional complexity)

    fn lazy_ntt(&mut self)
    {
        let context = self.context.as_ref().unwrap();
        if self.is_ntt_form {
            panic!("is already in ntt");
        }
        let q = context.q.rep();

        let mut coeffs_u64: Vec<u64> = self.coeffs.iter()
        .map(|elm| elm.rep())
        .collect();

        let roots_u64: Vec<u64> = context.roots.iter()
        .map(|elm| elm.rep())
        .collect();
        let scaledroots_u64: Vec<u64> = context.scaled_roots.iter()
        .map(|elm| elm.rep())
        .collect();

        lazy_ntt_u64(&mut coeffs_u64, &roots_u64, &scaledroots_u64, q); 

        for (coeff, coeff_u64) in self.coeffs.iter_mut().zip(coeffs_u64.iter()){
            *coeff = T::modulus(&T::from(*coeff_u64), &context.q); 
        }
        self.set_ntt_form(true);
    }