| <!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/rustls-0.19.1/src/bs_debug.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>bs_debug.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="../../rustls/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="../../rustls/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::fmt; |
| |
| <span class="doccomment">/// Alternative implementation of `fmt::Debug` for byte slice. |
| /// |
| /// Standard `Debug` implementation for `[u8]` is comma separated |
| /// list of numbers. Since large amount of byte strings are in fact |
| /// ASCII strings or contain a lot of ASCII strings (e. g. HTTP), |
| /// it is convenient to print strings as ASCII when possible. |
| /// |
| /// This struct wraps `&[u8]` just to override `fmt::Debug`. |
| /// |
| /// `BsDebug` is not a part of public API of bytes crate. |
| </span><span class="kw">pub struct </span>BsDebug<<span class="lifetime">'a</span>>(<span class="kw">pub </span><span class="kw-2">&</span><span class="lifetime">'a </span>[u8]); |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> fmt::Debug <span class="kw">for </span>BsDebug<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter) -> <span class="prelude-ty">Result</span><(), fmt::Error> { |
| <span class="macro">write!</span>(fmt, <span class="string">"b\""</span>)<span class="question-mark">?</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>c <span class="kw">in </span><span class="self">self</span>.<span class="number">0 </span>{ |
| <span class="comment">// https://doc.rust-lang.org/reference.html#byte-escapes |
| </span><span class="kw">if </span>c == <span class="string">b'\n' </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\n"</span>)<span class="question-mark">?</span>; |
| } <span class="kw">else if </span>c == <span class="string">b'\r' </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\r"</span>)<span class="question-mark">?</span>; |
| } <span class="kw">else if </span>c == <span class="string">b'\t' </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\t"</span>)<span class="question-mark">?</span>; |
| } <span class="kw">else if </span>c == <span class="string">b'\\' </span>|| c == <span class="string">b'"' </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\{}"</span>, c <span class="kw">as </span>char)<span class="question-mark">?</span>; |
| } <span class="kw">else if </span>c == <span class="string">b'\0' </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\0"</span>)<span class="question-mark">?</span>; |
| <span class="comment">// ASCII printable |
| </span>} <span class="kw">else if </span>c >= <span class="number">0x20 </span>&& c < <span class="number">0x7f </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"{}"</span>, c <span class="kw">as </span>char)<span class="question-mark">?</span>; |
| } <span class="kw">else </span>{ |
| <span class="macro">write!</span>(fmt, <span class="string">"\\x{:02x}"</span>, c)<span class="question-mark">?</span>; |
| } |
| } |
| <span class="macro">write!</span>(fmt, <span class="string">"\""</span>)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use </span><span class="kw">super</span>::BsDebug; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>debug() { |
| <span class="kw">let </span>vec: Vec<<span class="kw">_</span>> = (<span class="number">0</span>..<span class="number">0x100</span>).map(|b| b <span class="kw">as </span>u8).collect(); |
| |
| <span class="kw">let </span>expected = <span class="string">"b\"\ |
| \\0\\x01\\x02\\x03\\x04\\x05\\x06\\x07\ |
| \\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f\ |
| \\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\ |
| \\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f\ |
| \x20!\\\"#$%&'()*+,-./0123456789:;<=>?\ |
| @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_\ |
| `abcdefghijklmnopqrstuvwxyz{|}~\\x7f\ |
| \\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87\ |
| \\x88\\x89\\x8a\\x8b\\x8c\\x8d\\x8e\\x8f\ |
| \\x90\\x91\\x92\\x93\\x94\\x95\\x96\\x97\ |
| \\x98\\x99\\x9a\\x9b\\x9c\\x9d\\x9e\\x9f\ |
| \\xa0\\xa1\\xa2\\xa3\\xa4\\xa5\\xa6\\xa7\ |
| \\xa8\\xa9\\xaa\\xab\\xac\\xad\\xae\\xaf\ |
| \\xb0\\xb1\\xb2\\xb3\\xb4\\xb5\\xb6\\xb7\ |
| \\xb8\\xb9\\xba\\xbb\\xbc\\xbd\\xbe\\xbf\ |
| \\xc0\\xc1\\xc2\\xc3\\xc4\\xc5\\xc6\\xc7\ |
| \\xc8\\xc9\\xca\\xcb\\xcc\\xcd\\xce\\xcf\ |
| \\xd0\\xd1\\xd2\\xd3\\xd4\\xd5\\xd6\\xd7\ |
| \\xd8\\xd9\\xda\\xdb\\xdc\\xdd\\xde\\xdf\ |
| \\xe0\\xe1\\xe2\\xe3\\xe4\\xe5\\xe6\\xe7\ |
| \\xe8\\xe9\\xea\\xeb\\xec\\xed\\xee\\xef\ |
| \\xf0\\xf1\\xf2\\xf3\\xf4\\xf5\\xf6\\xf7\ |
| \\xf8\\xf9\\xfa\\xfb\\xfc\\xfd\\xfe\\xff\""</span>; |
| |
| <span class="macro">assert_eq!</span>(expected, <span class="macro">format!</span>(<span class="string">"{:?}"</span>, BsDebug(<span class="kw-2">&</span>vec))); |
| } |
| } |
| </code></pre></div> |
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