use std::hash::Hasher;
use twox_hash::XxHash32;
pub type StoreObjectIID = u32;
pub type StoreObjectOID<'a> = &'a str;
pub type StoreTermHashed = u32;
pub struct StoreTermHash;
pub enum StoreMetaKey {
IIDIncr,
}
pub enum StoreMetaValue {
IIDIncr(StoreObjectIID),
}
impl StoreMetaKey {
pub fn as_u32(&self) -> u32 {
match self {
StoreMetaKey::IIDIncr => 0,
}
}
}
impl StoreTermHash {
pub fn from(term: &str) -> StoreTermHashed {
let mut hasher = XxHash32::with_seed(0);
hasher.write(term.as_bytes());
hasher.finish() as u32
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn it_converts_meta_key_to_u32() {
assert_eq!(StoreMetaKey::IIDIncr.as_u32(), 0);
}
#[test]
fn it_hashes_term() {
assert_eq!(StoreTermHash::from("hash:1"), 3637660813);
assert_eq!(StoreTermHash::from("hash:2"), 3577985381);
}
}