| <!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-1.28.2/src/io/util/read_int.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>read_int.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/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/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>::io::{AsyncRead, ReadBuf}; |
| |
| <span class="kw">use </span>bytes::Buf; |
| <span class="kw">use </span>pin_project_lite::pin_project; |
| <span class="kw">use </span>std::future::Future; |
| <span class="kw">use </span>std::io; |
| <span class="kw">use </span>std::io::ErrorKind::UnexpectedEof; |
| <span class="kw">use </span>std::marker::PhantomPinned; |
| <span class="kw">use </span>std::mem::size_of; |
| <span class="kw">use </span>std::pin::Pin; |
| <span class="kw">use </span>std::task::{Context, Poll}; |
| |
| <span class="macro">macro_rules! </span>reader { |
| (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$ty</span>:ty, <span class="macro-nonterminal">$reader</span>:ident) => { |
| <span class="macro">reader!</span>(<span class="macro-nonterminal">$name</span>, <span class="macro-nonterminal">$ty</span>, <span class="macro-nonterminal">$reader</span>, size_of::<<span class="macro-nonterminal">$ty</span>>()); |
| }; |
| (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$ty</span>:ty, <span class="macro-nonterminal">$reader</span>:ident, <span class="macro-nonterminal">$bytes</span>:expr) => { |
| <span class="macro">pin_project! </span>{ |
| <span class="attribute">#[doc(hidden)] |
| #[must_use = <span class="string">"futures do nothing unless you `.await` or poll them"</span>] |
| </span><span class="kw">pub struct </span><span class="macro-nonterminal">$name</span><R> { |
| <span class="attribute">#[pin] |
| </span>src: R, |
| buf: [u8; <span class="macro-nonterminal">$bytes</span>], |
| read: u8, |
| <span class="comment">// Make this future `!Unpin` for compatibility with async trait methods. |
| </span><span class="attribute">#[pin] |
| </span>_pin: PhantomPinned, |
| } |
| } |
| |
| <span class="kw">impl</span><R> <span class="macro-nonterminal">$name</span><R> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(src: R) -> <span class="self">Self </span>{ |
| <span class="macro-nonterminal">$name </span>{ |
| src, |
| buf: [<span class="number">0</span>; <span class="macro-nonterminal">$bytes</span>], |
| read: <span class="number">0</span>, |
| _pin: PhantomPinned, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><R> Future <span class="kw">for </span><span class="macro-nonterminal">$name</span><R> |
| <span class="kw">where |
| </span>R: AsyncRead, |
| { |
| <span class="kw">type </span>Output = io::Result<<span class="macro-nonterminal">$ty</span>>; |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">let </span><span class="kw-2">mut </span>me = <span class="self">self</span>.project(); |
| |
| <span class="kw">if </span><span class="kw-2">*</span>me.read == <span class="macro-nonterminal">$bytes </span><span class="kw">as </span>u8 { |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Ok</span>(Buf::<span class="macro-nonterminal">$reader</span>(<span class="kw-2">&mut &</span>me.buf[..]))); |
| } |
| |
| <span class="kw">while </span><span class="kw-2">*</span>me.read < <span class="macro-nonterminal">$bytes </span><span class="kw">as </span>u8 { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = ReadBuf::new(<span class="kw-2">&mut </span>me.buf[<span class="kw-2">*</span>me.read <span class="kw">as </span>usize..]); |
| |
| <span class="kw-2">*</span>me.read += <span class="kw">match </span>me.src.as_mut().poll_read(cx, <span class="kw-2">&mut </span>buf) { |
| Poll::Pending => <span class="kw">return </span>Poll::Pending, |
| Poll::Ready(<span class="prelude-val">Err</span>(e)) => <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(e.into())), |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) => { |
| <span class="kw">let </span>n = buf.filled().len(); |
| <span class="kw">if </span>n == <span class="number">0 </span>{ |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(UnexpectedEof.into())); |
| } |
| |
| n <span class="kw">as </span>u8 |
| } |
| }; |
| } |
| |
| <span class="kw">let </span>num = Buf::<span class="macro-nonterminal">$reader</span>(<span class="kw-2">&mut &</span>me.buf[..]); |
| |
| Poll::Ready(<span class="prelude-val">Ok</span>(num)) |
| } |
| } |
| }; |
| } |
| |
| <span class="macro">macro_rules! </span>reader8 { |
| (<span class="macro-nonterminal">$name</span>:ident, <span class="macro-nonterminal">$ty</span>:ty) => { |
| <span class="macro">pin_project! </span>{ |
| <span class="doccomment">/// Future returned from `read_u8` |
| </span><span class="attribute">#[doc(hidden)] |
| #[must_use = <span class="string">"futures do nothing unless you `.await` or poll them"</span>] |
| </span><span class="kw">pub struct </span><span class="macro-nonterminal">$name</span><R> { |
| <span class="attribute">#[pin] |
| </span>reader: R, |
| <span class="comment">// Make this future `!Unpin` for compatibility with async trait methods. |
| </span><span class="attribute">#[pin] |
| </span>_pin: PhantomPinned, |
| } |
| } |
| |
| <span class="kw">impl</span><R> <span class="macro-nonterminal">$name</span><R> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>new(reader: R) -> <span class="macro-nonterminal">$name</span><R> { |
| <span class="macro-nonterminal">$name </span>{ |
| reader, |
| _pin: PhantomPinned, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><R> Future <span class="kw">for </span><span class="macro-nonterminal">$name</span><R> |
| <span class="kw">where |
| </span>R: AsyncRead, |
| { |
| <span class="kw">type </span>Output = io::Result<<span class="macro-nonterminal">$ty</span>>; |
| |
| <span class="kw">fn </span>poll(<span class="self">self</span>: Pin<<span class="kw-2">&mut </span><span class="self">Self</span>>, cx: <span class="kw-2">&mut </span>Context<<span class="lifetime">'_</span>>) -> Poll<<span class="self">Self</span>::Output> { |
| <span class="kw">let </span>me = <span class="self">self</span>.project(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0</span>; <span class="number">1</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = ReadBuf::new(<span class="kw-2">&mut </span>buf); |
| <span class="kw">match </span>me.reader.poll_read(cx, <span class="kw-2">&mut </span>buf) { |
| Poll::Pending => Poll::Pending, |
| Poll::Ready(<span class="prelude-val">Err</span>(e)) => Poll::Ready(<span class="prelude-val">Err</span>(e.into())), |
| Poll::Ready(<span class="prelude-val">Ok</span>(())) => { |
| <span class="kw">if </span>buf.filled().len() == <span class="number">0 </span>{ |
| <span class="kw">return </span>Poll::Ready(<span class="prelude-val">Err</span>(UnexpectedEof.into())); |
| } |
| |
| Poll::Ready(<span class="prelude-val">Ok</span>(buf.filled()[<span class="number">0</span>] <span class="kw">as </span><span class="macro-nonterminal">$ty</span>)) |
| } |
| } |
| } |
| } |
| }; |
| } |
| |
| <span class="macro">reader8!</span>(ReadU8, u8); |
| <span class="macro">reader8!</span>(ReadI8, i8); |
| |
| <span class="macro">reader!</span>(ReadU16, u16, get_u16); |
| <span class="macro">reader!</span>(ReadU32, u32, get_u32); |
| <span class="macro">reader!</span>(ReadU64, u64, get_u64); |
| <span class="macro">reader!</span>(ReadU128, u128, get_u128); |
| |
| <span class="macro">reader!</span>(ReadI16, i16, get_i16); |
| <span class="macro">reader!</span>(ReadI32, i32, get_i32); |
| <span class="macro">reader!</span>(ReadI64, i64, get_i64); |
| <span class="macro">reader!</span>(ReadI128, i128, get_i128); |
| |
| <span class="macro">reader!</span>(ReadF32, f32, get_f32); |
| <span class="macro">reader!</span>(ReadF64, f64, get_f64); |
| |
| <span class="macro">reader!</span>(ReadU16Le, u16, get_u16_le); |
| <span class="macro">reader!</span>(ReadU32Le, u32, get_u32_le); |
| <span class="macro">reader!</span>(ReadU64Le, u64, get_u64_le); |
| <span class="macro">reader!</span>(ReadU128Le, u128, get_u128_le); |
| |
| <span class="macro">reader!</span>(ReadI16Le, i16, get_i16_le); |
| <span class="macro">reader!</span>(ReadI32Le, i32, get_i32_le); |
| <span class="macro">reader!</span>(ReadI64Le, i64, get_i64_le); |
| <span class="macro">reader!</span>(ReadI128Le, i128, get_i128_le); |
| |
| <span class="macro">reader!</span>(ReadF32Le, f32, get_f32_le); |
| <span class="macro">reader!</span>(ReadF64Le, f64, get_f64_le); |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="tokio" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
