Function powers

utils/src/ff.rs:76–85

Powers of a finite field as `[1, s, s^2, .. s^{num-1}]`

(s: &F, num: u32)

/// Powers of a finite field as `[1, s, s^2, .. s^{num-1}]`
pub fn powers<F: Field>(s: &F, num: u32) -> Vec<F> {
    let mut powers = Vec::with_capacity(num as usize);
    if num > 0 {
        powers.push(F::one());
        for i in 1..num {
            powers.push(powers[i as usize - 1] * s);
        }
    }
    powers
}

/// Powers of a finite field as `[start, start*exp, start * exp^2, .. start * exp^{num-1}]`
pub fn powers_starting_from<F: Field>(start: F, exp: &F, num: u32) -> Vec<F> {