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macro_rules! decoder {
($(#[$attr:meta])* $name:ident<$inner:ident> $({ $($inherent_methods:tt)* })*) => {
pin_project_lite::pin_project! {
$(#[$attr])*
///
/// This structure implements an [`AsyncWrite`](futures_io::AsyncWrite) interface and will
/// take in compressed data and write it, uncompressed, to an underlying stream.
#[derive(Debug)]
pub struct $name<$inner> {
#[pin]
inner: crate::futures::write::Decoder<$inner, crate::codecs::$name>,
}
}
impl<$inner: futures_io::AsyncWrite> $name<$inner> {
/// Creates a new decoder which will take in compressed data and write it, uncompressed,
/// to the given stream.
pub fn new(read: $inner) -> $name<$inner> {
$name {
inner: crate::futures::write::Decoder::new(read, crate::codecs::$name::new()),
}
}
/// Creates a new decoder with the given codec, which will take in compressed data and write it, uncompressed,
/// to the given stream.
pub fn with_codec(read: $inner, codec: crate::codecs::$name) -> $name<$inner> {
$name {
inner: crate::futures::write::Decoder::new(read, codec)
}
}
$($($inherent_methods)*)*
}
impl<$inner> $name<$inner> {
/// Acquires a reference to the underlying reader that this decoder is wrapping.
pub fn get_ref(&self) -> &$inner {
self.inner.get_ref()
}
/// Acquires a mutable reference to the underlying reader that this decoder is
/// wrapping.
///
/// Note that care must be taken to avoid tampering with the state of the reader which
/// may otherwise confuse this decoder.
pub fn get_mut(&mut self) -> &mut $inner {
self.inner.get_mut()
}
/// Acquires a pinned mutable reference to the underlying reader that this decoder is
/// wrapping.
///
/// Note that care must be taken to avoid tampering with the state of the reader which
/// may otherwise confuse this decoder.
pub fn get_pin_mut(self: std::pin::Pin<&mut Self>) -> std::pin::Pin<&mut $inner> {
self.project().inner.get_pin_mut()
}
/// Consumes this decoder returning the underlying reader.
///
/// Note that this may discard internal state of this decoder, so care should be taken
/// to avoid losing resources when this is called.
pub fn into_inner(self) -> $inner {
self.inner.into_inner()
}
}
impl<$inner: futures_io::AsyncWrite> futures_io::AsyncWrite for $name<$inner> {
fn poll_write(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
buf: &[u8],
) -> std::task::Poll<std::io::Result<usize>> {
self.project().inner.poll_write(cx, buf)
}
fn poll_flush(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<std::io::Result<()>> {
self.project().inner.poll_flush(cx)
}
fn poll_close(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
) -> std::task::Poll<std::io::Result<()>> {
self.project().inner.poll_close(cx)
}
}
impl<$inner: futures_io::AsyncRead> futures_io::AsyncRead for $name<$inner> {
fn poll_read(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
buf: &mut [u8]
) -> std::task::Poll<std::io::Result<usize>> {
self.get_pin_mut().poll_read(cx, buf)
}
fn poll_read_vectored(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>,
bufs: &mut [futures_io::IoSliceMut<'_>]
) -> std::task::Poll<std::io::Result<usize>> {
self.get_pin_mut().poll_read_vectored(cx, bufs)
}
}
impl<$inner: futures_io::AsyncBufRead> futures_io::AsyncBufRead for $name<$inner> {
fn poll_fill_buf(
self: std::pin::Pin<&mut Self>,
cx: &mut std::task::Context<'_>
) -> std::task::Poll<std::io::Result<&[u8]>> {
self.get_pin_mut().poll_fill_buf(cx)
}
fn consume(self: std::pin::Pin<&mut Self>, amt: usize) {
self.get_pin_mut().consume(amt)
}
}
const _: () = {
use crate::core::util::{_assert_send, _assert_sync};
use core::pin::Pin;
use futures_io::AsyncWrite;
_assert_send::<$name<Pin<Box<dyn AsyncWrite + Send>>>>();
_assert_sync::<$name<Pin<Box<dyn AsyncWrite + Sync>>>>();
};
}
}