ex_gpgme

use rustler::{NifEnv, NifTerm, NifEncoder};
use gpgme::HashAlgorithm;

mod atoms {
    rustler_atoms! {
        atom none;
        atom md2;
        atom md4;
        atom md5;
        atom sha1;
        atom sha224;
        atom sha256;
        atom sha384;
        atom sha512;
        atom ripe_md160;
        atom tiger;
        atom haval;
        atom crc32;
        atom crc32_rfc1510;
        atom crc24_rfc2440;
        atom other;
    }
}

pub fn transform_hash_algorithm<'a>(env: NifEnv<'a>, algorithm: HashAlgorithm) -> NifTerm<'a> {
    match algorithm {
        HashAlgorithm::None => atoms::none().encode(env),
        HashAlgorithm::Md2 => atoms::md2().encode(env),
        HashAlgorithm::Md4 => atoms::md4().encode(env),
        HashAlgorithm::Md5 => atoms::md5().encode(env),
        HashAlgorithm::Sha1 => atoms::sha1().encode(env),
        HashAlgorithm::Sha224 => atoms::sha224().encode(env),
        HashAlgorithm::Sha256 => atoms::sha256().encode(env),
        HashAlgorithm::Sha384 => atoms::sha384().encode(env),
        HashAlgorithm::Sha512 => atoms::sha512().encode(env),
        HashAlgorithm::RipeMd160 => atoms::ripe_md160().encode(env),
        HashAlgorithm::Tiger => atoms::tiger().encode(env),
        HashAlgorithm::Haval => atoms::haval().encode(env),
        HashAlgorithm::Crc32 => atoms::crc32().encode(env),
        HashAlgorithm::Crc32Rfc1510 => atoms::crc32_rfc1510().encode(env),
        HashAlgorithm::CrC24Rfc2440 => atoms::crc24_rfc2440().encode(env),
        HashAlgorithm::Other(other) => (atoms::other(), other).encode(env),
    }
}