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<!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 `src/console.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>console.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" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" 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="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../os/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a><h2 class="location"></h2></nav><nav class="sidebar"><a class="sidebar-logo" href="../../os/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../os/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><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"><button type="button">?</button></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></div><section id="main-content" class="content"><div class="example-wrap"><pre class="line-numbers"><span id="1">1</span>
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</pre><pre class="rust"><code><span class="doccomment">//! SBI console driver, for text output</span>
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<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::sbi::console_putchar</span>;
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<span class="kw">use</span> <span class="ident">core::fmt</span>::{<span class="self">self</span>, <span class="ident">Write</span>};
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<span class="kw">struct</span> <span class="ident">Stdout</span>;
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<span class="kw">impl</span> <span class="ident">Write</span> <span class="kw">for</span> <span class="ident">Stdout</span> {
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<span class="kw">fn</span> <span class="ident">write_str</span>(<span class="kw-2">&mut</span> <span class="self">self</span>, <span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">fmt::Result</span> {
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<span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> <span class="ident">s</span>.<span class="ident">chars</span>() {
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<span class="ident">console_putchar</span>(<span class="ident">c</span> <span class="kw">as</span> <span class="ident">usize</span>);
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}
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<span class="prelude-val">Ok</span>(())
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}
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}
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">print</span>(<span class="ident">args</span>: <span class="ident">fmt::Arguments</span>) {
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<span class="ident">Stdout</span>.<span class="ident">write_fmt</span>(<span class="ident">args</span>).<span class="ident">unwrap</span>();
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}
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<span class="doccomment">/// print string macro</span>
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<span class="attribute">#[<span class="ident">macro_export</span>]</span>
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<span class="macro">macro_rules!</span> <span class="ident">print</span> {
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>: <span class="ident">literal</span> $(, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="ident">tt</span>)<span class="op">+</span>)<span class="question-mark">?</span>) => {
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<span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::console::print</span>(<span class="macro">format_args!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span> $(, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>)<span class="op">+</span>)<span class="question-mark">?</span>));
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}
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}
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<span class="doccomment">/// println string macro</span>
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<span class="attribute">#[<span class="ident">macro_export</span>]</span>
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<span class="macro">macro_rules!</span> <span class="ident">println</span> {
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(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>: <span class="ident">literal</span> $(, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>: <span class="ident">tt</span>)<span class="op">+</span>)<span class="question-mark">?</span>) => {
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<span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::console::print</span>(<span class="macro">format_args!</span>(<span class="macro">concat!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">fmt</span>, <span class="string">"\n"</span>) $(, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">arg</span>)<span class="op">+</span>)<span class="question-mark">?</span>));
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}
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}
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</code></pre></div>
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