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// Copyright 2022 Datafuse Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

//! into_reader will provide different implementations to convert into
//! [`oio::Read`][crate::raw::oio::Read]
//!
//! - (Some(offset), Some(size)) => by_range
//! - (Some(offset), None) => by_offset
//! - (None, Some(size)) => by_tail
//! - (None, None) => by_offset
//!
//! The main different is whether and when to call `stat` to get total
//! content length.
//!
//! # TODO
//!
//! We only implement by_range so far.
//!
//! We should implement other types so that they can be zero cost on non-seek
//! cases.
//!
//! For example, for `by_full`, we don't need to do `stat` everytime. If
//! user call `poll_read` first, we can get the total_size from returning
//! reader. In this way, we can save 40ms in average for every s3 read call.

mod by_range;
pub use by_range::by_range;
pub use by_range::RangeReader;

mod from_fd;
pub use from_fd::from_fd;
pub use from_fd::FdReader;