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src/backup/chunk_stream.rs: use more generics

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This commit is contained in:
Dietmar Maurer
2019-05-22 09:18:05 +02:00
parent 169c0e060f
commit c052be5c86
1 changed files with 9 additions and 6 deletions
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15
src/backup/chunk_stream.rs
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@ -5,21 +5,24 @@ use futures::{Async, Poll};
use futures::stream::Stream;
/// Split input stream into dynamic sized chunks
pub struct ChunkStream<S: Stream<Item=Vec<u8>, Error=Error>> {
pub struct ChunkStream<S> {
input: S,
chunker: Chunker,
buffer: Option<Vec<u8>>,
scan: Option<Vec<u8>>,
}
impl <S: Stream<Item=Vec<u8>, Error=Error>> ChunkStream<S> {
impl <S> ChunkStream<S> {
pub fn new(input: S) -> Self {
Self { input, chunker: Chunker::new(4 * 1024 * 1024), buffer: None, scan: None}
}
}
impl <S: Stream<Item=Vec<u8>, Error=Error>> Stream for ChunkStream<S> {
impl <S> Stream for ChunkStream<S>
where S: Stream,
S::Item: AsRef<[u8]>,
S::Error: Into<Error>,
{
type Item = Vec<u8>;
type Error = Error;
@ -49,7 +52,7 @@ impl <S: Stream<Item=Vec<u8>, Error=Error>> Stream for ChunkStream<S> {
match self.input.poll() {
Err(err) => {
return Err(err);
return Err(err.into());
}
Ok(Async::NotReady) => {
return Ok(Async::NotReady);
@ -66,7 +69,7 @@ impl <S: Stream<Item=Vec<u8>, Error=Error>> Stream for ChunkStream<S> {
}
Ok(Async::Ready(Some(data))) => {
let scan = self.scan.get_or_insert_with(|| Vec::with_capacity(1024*1024));
scan.extend(data);
scan.extend(data.as_ref());
}
}
}