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use crate::{Buffer, Permutation};

const ROUNDS: usize = 24;

const RC: [u64; ROUNDS] = [
    1u64,
    0x8082u64,
    0x800000000000808au64,
    0x8000000080008000u64,
    0x808bu64,
    0x80000001u64,
    0x8000000080008081u64,
    0x8000000000008009u64,
    0x8au64,
    0x88u64,
    0x80008009u64,
    0x8000000au64,
    0x8000808bu64,
    0x800000000000008bu64,
    0x8000000000008089u64,
    0x8000000000008003u64,
    0x8000000000008002u64,
    0x8000000000000080u64,
    0x800au64,
    0x800000008000000au64,
    0x8000000080008081u64,
    0x8000000000008080u64,
    0x80000001u64,
    0x8000000080008008u64,
];

keccak_function!("`keccak-f[1600, 24]`", keccakf, ROUNDS, RC);

pub struct KeccakF;

impl Permutation for KeccakF {
    fn execute(buffer: &mut Buffer) {
        keccakf(buffer.words());
    }
}