Function iota_crypto::hash_with_mode

pub fn hash_with_mode(
    mode: HashMode, 
    trits: &[i8], 
    out: &mut [i8]
) -> Result<(), Error>

Allows you to hash trits into out using the mode of your choosing

 use iota_crypto::{self, HashMode};

 let input = [0; 243];
 let mut out = [0; 243];
 iota_crypto::hash_with_mode(HashMode::Kerl, &input, &mut out);