| <!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/integer-encoding-1.1.7/src/writer.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>writer.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="../../integer_encoding/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="../../integer_encoding/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>std::io::{<span class="prelude-ty">Result</span>, Write}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::fixed::FixedInt; |
| <span class="kw">use </span><span class="kw">crate</span>::varint::VarInt; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"tokio_async"</span>)] |
| </span><span class="kw">use </span>tokio::{io::AsyncWriteExt, prelude::<span class="kw-2">*</span>}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"futures_async"</span>)] |
| </span><span class="kw">use </span>futures_util::{io::AsyncWriteExt, io::AsyncWrite}; |
| |
| <span class="doccomment">/// A trait for writing integers in VarInt encoding to any `Write` type. This packs encoding and |
| /// writing into one step. |
| </span><span class="kw">pub trait </span>VarIntWriter { |
| <span class="kw">fn </span>write_varint<VI: VarInt>(<span class="kw-2">&mut </span><span class="self">self</span>, n: VI) -> <span class="prelude-ty">Result</span><usize>; |
| } |
| |
| <span class="doccomment">/// Like VarIntWriter, but asynchronous. |
| </span><span class="attribute">#[cfg(any(feature = <span class="string">"tokio_async"</span>, feature = <span class="string">"futures_async"</span>))] |
| #[async_trait::async_trait] |
| </span><span class="kw">pub trait </span>VarIntAsyncWriter { |
| <span class="doccomment">/// Write a VarInt integer to an asynchronous writer. |
| </span><span class="kw">async fn </span>write_varint_async<VI: VarInt + Send>(<span class="kw-2">&mut </span><span class="self">self</span>, n: VI) -> <span class="prelude-ty">Result</span><usize>; |
| } |
| |
| <span class="attribute">#[cfg(any(feature = <span class="string">"tokio_async"</span>, feature = <span class="string">"futures_async"</span>))] |
| #[async_trait::async_trait] |
| </span><span class="kw">impl</span><AW: AsyncWrite + Send + Unpin> VarIntAsyncWriter <span class="kw">for </span>AW { |
| <span class="kw">async fn </span>write_varint_async<VI: VarInt + Send>(<span class="kw-2">&mut </span><span class="self">self</span>, n: VI) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">10</span>]; |
| <span class="kw">let </span>b = n.encode_var(<span class="kw-2">&mut </span>buf); |
| <span class="self">self</span>.write_all(<span class="kw-2">&</span>buf[<span class="number">0</span>..b]).<span class="kw">await</span><span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(b) |
| } |
| } |
| |
| <span class="kw">impl</span><Inner: Write> VarIntWriter <span class="kw">for </span>Inner { |
| <span class="kw">fn </span>write_varint<VI: VarInt>(<span class="kw-2">&mut </span><span class="self">self</span>, n: VI) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">10</span>]; |
| <span class="kw">let </span>used = n.encode_var(<span class="kw-2">&mut </span>buf[..]); |
| |
| <span class="self">self</span>.write_all(<span class="kw-2">&</span>buf[<span class="number">0</span>..used])<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(used) |
| } |
| } |
| |
| <span class="doccomment">/// A trait for writing integers without encoding (i.e. `FixedInt`) to any `Write` type. |
| </span><span class="kw">pub trait </span>FixedIntWriter { |
| <span class="kw">fn </span>write_fixedint<FI: FixedInt>(<span class="kw-2">&mut </span><span class="self">self</span>, n: FI) -> <span class="prelude-ty">Result</span><usize>; |
| } |
| |
| <span class="attribute">#[cfg(any(feature = <span class="string">"tokio_async"</span>, feature = <span class="string">"futures_async"</span>))] |
| #[async_trait::async_trait] |
| </span><span class="kw">pub trait </span>FixedIntAsyncWriter { |
| <span class="kw">async fn </span>write_fixedint_async<FI: FixedInt + Send>(<span class="kw-2">&mut </span><span class="self">self</span>, n: FI) -> <span class="prelude-ty">Result</span><usize>; |
| } |
| |
| <span class="attribute">#[cfg(any(feature = <span class="string">"tokio_async"</span>, feature = <span class="string">"futures_async"</span>))] |
| #[async_trait::async_trait] |
| </span><span class="kw">impl</span><AW: AsyncWrite + Unpin + Send> FixedIntAsyncWriter <span class="kw">for </span>AW { |
| <span class="kw">async fn </span>write_fixedint_async<FI: FixedInt + Send>(<span class="kw-2">&mut </span><span class="self">self</span>, n: FI) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">8</span>]; |
| n.encode_fixed(<span class="kw-2">&mut </span>buf[<span class="number">0</span>..FI::required_space()]); |
| <span class="self">self</span>.write_all(<span class="kw-2">&</span>buf[<span class="number">0</span>..FI::required_space()]).<span class="kw">await</span><span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(FI::REQUIRED_SPACE) |
| } |
| } |
| |
| <span class="kw">impl</span><W: Write> FixedIntWriter <span class="kw">for </span>W { |
| <span class="kw">fn </span>write_fixedint<FI: FixedInt>(<span class="kw-2">&mut </span><span class="self">self</span>, n: FI) -> <span class="prelude-ty">Result</span><usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0 </span><span class="kw">as </span>u8; <span class="number">8</span>]; |
| n.encode_fixed(<span class="kw-2">&mut </span>buf[<span class="number">0</span>..FI::required_space()]); |
| |
| <span class="self">self</span>.write_all(<span class="kw-2">&</span>buf[<span class="number">0</span>..FI::required_space()])<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(FI::REQUIRED_SPACE) |
| } |
| } |
| </code></pre></div> |
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