mirror of
https://github.com/meilisearch/meilisearch.git
synced 2024-11-26 12:05:05 +08:00
28 lines
782 B
Rust
28 lines
782 B
Rust
|
use std::borrow::Cow;
|
||
|
|
use std::convert::TryInto;
|
||
|
|
use std::str;
|
||
|
|
|
||
|
|
pub struct BEU16StrCodec;
|
||
|
|
|
||
|
|
impl<'a> heed::BytesDecode<'a> for BEU16StrCodec {
|
||
|
|
type DItem = (u16, &'a str);
|
||
|
|
|
||
|
|
fn bytes_decode(bytes: &'a [u8]) -> Option<Self::DItem> {
|
||
|
|
let (n_bytes, str_bytes) = bytes.split_at(2);
|
||
|
|
let n = n_bytes.try_into().map(u16::from_be_bytes).ok()?;
|
||
|
|
let s = str::from_utf8(str_bytes).ok()?;
|
||
|
|
Some((n, s))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<'a> heed::BytesEncode<'a> for BEU16StrCodec {
|
||
|
|
type EItem = (u16, &'a str);
|
||
|
|
|
||
|
|
fn bytes_encode((n, s): &Self::EItem) -> Option<Cow<[u8]>> {
|
||
|
|
let mut bytes = Vec::with_capacity(s.len() + 2);
|
||
|
|
bytes.extend_from_slice(&n.to_be_bytes());
|
||
|
|
bytes.extend_from_slice(s.as_bytes());
|
||
|
|
Some(Cow::Owned(bytes))
|
||
|
|
}
|
||
|
|
}
|