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use std::io::{Error, ErrorKind, Result};
use std::ops::{Range, RangeFrom, RangeFull, RangeTo};
use arrow_array::UInt32Array;
use async_trait::async_trait;
use byteorder::{ByteOrder, LittleEndian};
use prost::bytes::Bytes;
use prost::Message;
use tokio::io::{AsyncWrite, AsyncWriteExt};
pub(crate) mod exec;
pub mod local;
pub mod object_reader;
pub mod object_store;
pub mod object_writer;
mod reader;
mod writer;
use crate::format::{ProtoStruct, INDEX_MAGIC, MAGIC};
pub use self::object_store::ObjectStore;
pub use reader::read_manifest;
pub use reader::FileReader;
pub use writer::*;
#[async_trait]
pub trait AsyncWriteProtoExt {
async fn write_footer(&mut self, offset: u64) -> Result<()>;
}
#[async_trait]
impl<T: AsyncWrite + Unpin + std::marker::Send> AsyncWriteProtoExt for T {
async fn write_footer(&mut self, offset: u64) -> Result<()> {
self.write_u64_le(offset).await?;
self.write_all(INDEX_MAGIC).await?;
Ok(())
}
}
pub fn read_metadata_offset(bytes: &Bytes) -> Result<usize> {
let len = bytes.len();
if len < 16 {
return Err(Error::new(
ErrorKind::Interrupted,
"does not have sufficient data",
));
}
let offset_bytes = bytes.slice(len - 16..len - 8);
Ok(LittleEndian::read_u64(offset_bytes.as_ref()) as usize)
}
pub fn read_message_from_buf<M: Message + Default>(buf: &Bytes) -> Result<M> {
let msg_len = LittleEndian::read_u32(buf) as usize;
Ok(M::decode(&buf[4..4 + msg_len])?)
}
pub fn read_struct_from_buf<M: Message + Default, T: ProtoStruct<Proto = M> + From<M>>(
buf: &Bytes,
) -> Result<T> {
let msg: M = read_message_from_buf(buf)?;
Ok(T::from(msg))
}
#[derive(Debug, Clone)]
pub(crate) enum ReadBatchParams {
Range(Range<usize>),
RangeFull,
RangeTo(RangeTo<usize>),
RangeFrom(RangeFrom<usize>),
Indices(UInt32Array),
}
impl Default for ReadBatchParams {
fn default() -> Self {
Self::RangeFull
}
}
impl From<&[u32]> for ReadBatchParams {
fn from(value: &[u32]) -> Self {
Self::Indices(UInt32Array::from_iter_values(value.iter().copied()))
}
}
impl From<UInt32Array> for ReadBatchParams {
fn from(value: UInt32Array) -> Self {
Self::Indices(value)
}
}
impl From<RangeFull> for ReadBatchParams {
fn from(_: RangeFull) -> Self {
Self::RangeFull
}
}
impl From<Range<usize>> for ReadBatchParams {
fn from(r: Range<usize>) -> Self {
Self::Range(r)
}
}
impl From<RangeTo<usize>> for ReadBatchParams {
fn from(r: RangeTo<usize>) -> Self {
Self::RangeTo(r)
}
}
impl From<RangeFrom<usize>> for ReadBatchParams {
fn from(r: RangeFrom<usize>) -> Self {
Self::RangeFrom(r)
}
}
impl From<&Self> for ReadBatchParams {
fn from(params: &Self) -> Self {
params.clone()
}
}