| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-util-0.7.8/src/codec/bytes_codec.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>bytes_codec.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../tokio_util/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../tokio_util/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="kw">use </span><span class="kw">crate</span>::codec::decoder::Decoder; |
| <span class="kw">use </span><span class="kw">crate</span>::codec::encoder::Encoder; |
| |
| <span class="kw">use </span>bytes::{BufMut, Bytes, BytesMut}; |
| <span class="kw">use </span>std::io; |
| |
| <span class="doccomment">/// A simple [`Decoder`] and [`Encoder`] implementation that just ships bytes around. |
| /// |
| /// [`Decoder`]: crate::codec::Decoder |
| /// [`Encoder`]: crate::codec::Encoder |
| /// |
| /// # Example |
| /// |
| /// Turn an [`AsyncRead`] into a stream of `Result<`[`BytesMut`]`, `[`Error`]`>`. |
| /// |
| /// [`AsyncRead`]: tokio::io::AsyncRead |
| /// [`BytesMut`]: bytes::BytesMut |
| /// [`Error`]: std::io::Error |
| /// |
| /// ``` |
| /// # mod hidden { |
| /// # #[allow(unused_imports)] |
| /// use tokio::fs::File; |
| /// # } |
| /// use tokio::io::AsyncRead; |
| /// use tokio_util::codec::{FramedRead, BytesCodec}; |
| /// |
| /// # enum File {} |
| /// # impl File { |
| /// # async fn open(_name: &str) -> Result<impl AsyncRead, std::io::Error> { |
| /// # use std::io::Cursor; |
| /// # Ok(Cursor::new(vec![0, 1, 2, 3, 4, 5])) |
| /// # } |
| /// # } |
| /// # |
| /// # #[tokio::main(flavor = "current_thread")] |
| /// # async fn main() -> Result<(), std::io::Error> { |
| /// let my_async_read = File::open("filename.txt").await?; |
| /// let my_stream_of_bytes = FramedRead::new(my_async_read, BytesCodec::new()); |
| /// # Ok(()) |
| /// # } |
| /// ``` |
| /// |
| </span><span class="attribute">#[derive(Copy, Clone, Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Default)] |
| </span><span class="kw">pub struct </span>BytesCodec(()); |
| |
| <span class="kw">impl </span>BytesCodec { |
| <span class="doccomment">/// Creates a new `BytesCodec` for shipping around raw bytes. |
| </span><span class="kw">pub fn </span>new() -> BytesCodec { |
| BytesCodec(()) |
| } |
| } |
| |
| <span class="kw">impl </span>Decoder <span class="kw">for </span>BytesCodec { |
| <span class="kw">type </span>Item = BytesMut; |
| <span class="kw">type </span>Error = io::Error; |
| |
| <span class="kw">fn </span>decode(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>BytesMut) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><BytesMut>, io::Error> { |
| <span class="kw">if </span>!buf.is_empty() { |
| <span class="kw">let </span>len = buf.len(); |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(buf.split_to(len))) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Encoder<Bytes> <span class="kw">for </span>BytesCodec { |
| <span class="kw">type </span>Error = io::Error; |
| |
| <span class="kw">fn </span>encode(<span class="kw-2">&mut </span><span class="self">self</span>, data: Bytes, buf: <span class="kw-2">&mut </span>BytesMut) -> <span class="prelude-ty">Result</span><(), io::Error> { |
| buf.reserve(data.len()); |
| buf.put(data); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">impl </span>Encoder<BytesMut> <span class="kw">for </span>BytesCodec { |
| <span class="kw">type </span>Error = io::Error; |
| |
| <span class="kw">fn </span>encode(<span class="kw-2">&mut </span><span class="self">self</span>, data: BytesMut, buf: <span class="kw-2">&mut </span>BytesMut) -> <span class="prelude-ty">Result</span><(), io::Error> { |
| buf.reserve(data.len()); |
| buf.put(data); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tokio_util" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |