| <!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/url-2.3.1/src/host.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>host.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="../../url/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="../../url/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="comment">// Copyright 2013-2016 The rust-url developers. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="kw">use </span>std::cmp; |
| <span class="kw">use </span>std::fmt::{<span class="self">self</span>, Formatter}; |
| <span class="kw">use </span>std::net::{Ipv4Addr, Ipv6Addr}; |
| |
| <span class="kw">use </span>percent_encoding::{percent_decode, utf8_percent_encode, CONTROLS}; |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">use </span>serde::{Deserialize, Serialize}; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::parser::{ParseError, ParseResult}; |
| |
| <span class="attribute">#[cfg_attr(feature = <span class="string">"serde"</span>, derive(Deserialize, Serialize))] |
| #[derive(Copy, Clone, Debug, Eq, PartialEq)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">enum </span>HostInternal { |
| <span class="prelude-val">None</span>, |
| Domain, |
| Ipv4(Ipv4Addr), |
| Ipv6(Ipv6Addr), |
| } |
| |
| <span class="kw">impl </span>From<Host<String>> <span class="kw">for </span>HostInternal { |
| <span class="kw">fn </span>from(host: Host<String>) -> HostInternal { |
| <span class="kw">match </span>host { |
| Host::Domain(<span class="kw-2">ref </span>s) <span class="kw">if </span>s.is_empty() => HostInternal::None, |
| Host::Domain(<span class="kw">_</span>) => HostInternal::Domain, |
| Host::Ipv4(address) => HostInternal::Ipv4(address), |
| Host::Ipv6(address) => HostInternal::Ipv6(address), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// The host name of an URL. |
| </span><span class="attribute">#[cfg_attr(feature = <span class="string">"serde"</span>, derive(Deserialize, Serialize))] |
| #[derive(Clone, Debug, Eq, Ord, PartialOrd, Hash)] |
| </span><span class="kw">pub enum </span>Host<S = String> { |
| <span class="doccomment">/// A DNS domain name, as '.' dot-separated labels. |
| /// Non-ASCII labels are encoded in punycode per IDNA if this is the host of |
| /// a special URL, or percent encoded for non-special URLs. Hosts for |
| /// non-special URLs are also called opaque hosts. |
| </span>Domain(S), |
| |
| <span class="doccomment">/// An IPv4 address. |
| /// `Url::host_str` returns the serialization of this address, |
| /// as four decimal integers separated by `.` dots. |
| </span>Ipv4(Ipv4Addr), |
| |
| <span class="doccomment">/// An IPv6 address. |
| /// `Url::host_str` returns the serialization of that address between `[` and `]` brackets, |
| /// in the format per [RFC 5952 *A Recommendation |
| /// for IPv6 Address Text Representation*](https://tools.ietf.org/html/rfc5952): |
| /// lowercase hexadecimal with maximal `::` compression. |
| </span>Ipv6(Ipv6Addr), |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Host<<span class="kw-2">&</span><span class="lifetime">'a </span>str> { |
| <span class="doccomment">/// Return a copy of `self` that owns an allocated `String` but does not borrow an `&Url`. |
| </span><span class="kw">pub fn </span>to_owned(<span class="kw-2">&</span><span class="self">self</span>) -> Host<String> { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Host::Domain(domain) => Host::Domain(domain.to_owned()), |
| Host::Ipv4(address) => Host::Ipv4(address), |
| Host::Ipv6(address) => Host::Ipv6(address), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Host<String> { |
| <span class="doccomment">/// Parse a host: either an IPv6 address in [] square brackets, or a domain. |
| /// |
| /// <https://url.spec.whatwg.org/#host-parsing> |
| </span><span class="kw">pub fn </span>parse(input: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, ParseError> { |
| <span class="kw">if </span>input.starts_with(<span class="string">'['</span>) { |
| <span class="kw">if </span>!input.ends_with(<span class="string">']'</span>) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| <span class="kw">return </span>parse_ipv6addr(<span class="kw-2">&</span>input[<span class="number">1</span>..input.len() - <span class="number">1</span>]).map(Host::Ipv6); |
| } |
| <span class="kw">let </span>domain = percent_decode(input.as_bytes()).decode_utf8_lossy(); |
| |
| <span class="kw">let </span>domain = <span class="self">Self</span>::domain_to_ascii(<span class="kw-2">&</span>domain)<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>domain.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::EmptyHost); |
| } |
| |
| <span class="kw">let </span>is_invalid_domain_char = |c| { |
| <span class="macro">matches!</span>( |
| c, |
| <span class="string">'\0'</span>..=<span class="string">'\u{001F}' |
| </span>| <span class="string">' ' |
| </span>| <span class="string">'#' |
| </span>| <span class="string">'%' |
| </span>| <span class="string">'/' |
| </span>| <span class="string">':' |
| </span>| <span class="string">'<' |
| </span>| <span class="string">'>' |
| </span>| <span class="string">'?' |
| </span>| <span class="string">'@' |
| </span>| <span class="string">'[' |
| </span>| <span class="string">'\\' |
| </span>| <span class="string">']' |
| </span>| <span class="string">'^' |
| </span>| <span class="string">'\u{007F}' |
| </span>| <span class="string">'|' |
| </span>) |
| }; |
| |
| <span class="kw">if </span>domain.find(is_invalid_domain_char).is_some() { |
| <span class="prelude-val">Err</span>(ParseError::InvalidDomainCharacter) |
| } <span class="kw">else if </span>ends_in_a_number(<span class="kw-2">&</span>domain) { |
| <span class="kw">let </span>address = parse_ipv4addr(<span class="kw-2">&</span>domain)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(Host::Ipv4(address)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(Host::Domain(domain)) |
| } |
| } |
| |
| <span class="comment">// <https://url.spec.whatwg.org/#concept-opaque-host-parser> |
| </span><span class="kw">pub fn </span>parse_opaque(input: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, ParseError> { |
| <span class="kw">if </span>input.starts_with(<span class="string">'['</span>) { |
| <span class="kw">if </span>!input.ends_with(<span class="string">']'</span>) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| <span class="kw">return </span>parse_ipv6addr(<span class="kw-2">&</span>input[<span class="number">1</span>..input.len() - <span class="number">1</span>]).map(Host::Ipv6); |
| } |
| |
| <span class="kw">let </span>is_invalid_host_char = |c| { |
| <span class="macro">matches!</span>( |
| c, |
| <span class="string">'\0' </span>| <span class="string">'\t' |
| </span>| <span class="string">'\n' |
| </span>| <span class="string">'\r' |
| </span>| <span class="string">' ' |
| </span>| <span class="string">'#' |
| </span>| <span class="string">'/' |
| </span>| <span class="string">':' |
| </span>| <span class="string">'<' |
| </span>| <span class="string">'>' |
| </span>| <span class="string">'?' |
| </span>| <span class="string">'@' |
| </span>| <span class="string">'[' |
| </span>| <span class="string">'\\' |
| </span>| <span class="string">']' |
| </span>| <span class="string">'^' |
| </span>| <span class="string">'|' |
| </span>) |
| }; |
| |
| <span class="kw">if </span>input.find(is_invalid_host_char).is_some() { |
| <span class="prelude-val">Err</span>(ParseError::InvalidDomainCharacter) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(Host::Domain( |
| utf8_percent_encode(input, CONTROLS).to_string(), |
| )) |
| } |
| } |
| |
| <span class="doccomment">/// convert domain with idna |
| </span><span class="kw">fn </span>domain_to_ascii(domain: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><String, ParseError> { |
| idna::domain_to_ascii(domain).map_err(Into::into) |
| } |
| } |
| |
| <span class="kw">impl</span><S: AsRef<str>> fmt::Display <span class="kw">for </span>Host<S> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| Host::Domain(<span class="kw-2">ref </span>domain) => domain.as_ref().fmt(f), |
| Host::Ipv4(<span class="kw-2">ref </span>addr) => addr.fmt(f), |
| Host::Ipv6(<span class="kw-2">ref </span>addr) => { |
| f.write_str(<span class="string">"["</span>)<span class="question-mark">?</span>; |
| write_ipv6(addr, f)<span class="question-mark">?</span>; |
| f.write_str(<span class="string">"]"</span>) |
| } |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><S, T> PartialEq<Host<T>> <span class="kw">for </span>Host<S> |
| <span class="kw">where |
| </span>S: PartialEq<T>, |
| { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>Host<T>) -> bool { |
| <span class="kw">match </span>(<span class="self">self</span>, other) { |
| (Host::Domain(a), Host::Domain(b)) => a == b, |
| (Host::Ipv4(a), Host::Ipv4(b)) => a == b, |
| (Host::Ipv6(a), Host::Ipv6(b)) => a == b, |
| (<span class="kw">_</span>, <span class="kw">_</span>) => <span class="bool-val">false</span>, |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>write_ipv6(addr: <span class="kw-2">&</span>Ipv6Addr, f: <span class="kw-2">&mut </span>Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>segments = addr.segments(); |
| <span class="kw">let </span>(compress_start, compress_end) = longest_zero_sequence(<span class="kw-2">&</span>segments); |
| <span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>; |
| <span class="kw">while </span>i < <span class="number">8 </span>{ |
| <span class="kw">if </span>i == compress_start { |
| f.write_str(<span class="string">":"</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>i == <span class="number">0 </span>{ |
| f.write_str(<span class="string">":"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>compress_end < <span class="number">8 </span>{ |
| i = compress_end; |
| } <span class="kw">else </span>{ |
| <span class="kw">break</span>; |
| } |
| } |
| <span class="macro">write!</span>(f, <span class="string">"{:x}"</span>, segments[i <span class="kw">as </span>usize])<span class="question-mark">?</span>; |
| <span class="kw">if </span>i < <span class="number">7 </span>{ |
| f.write_str(<span class="string">":"</span>)<span class="question-mark">?</span>; |
| } |
| i += <span class="number">1</span>; |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="comment">// https://url.spec.whatwg.org/#concept-ipv6-serializer step 2 and 3 |
| </span><span class="kw">fn </span>longest_zero_sequence(pieces: <span class="kw-2">&</span>[u16; <span class="number">8</span>]) -> (isize, isize) { |
| <span class="kw">let </span><span class="kw-2">mut </span>longest = -<span class="number">1</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>longest_length = -<span class="number">1</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>start = -<span class="number">1</span>; |
| <span class="macro">macro_rules! </span>finish_sequence( |
| (<span class="macro-nonterminal">$end</span>: expr) => { |
| <span class="kw">if </span>start >= <span class="number">0 </span>{ |
| <span class="kw">let </span>length = <span class="macro-nonterminal">$end </span>- start; |
| <span class="kw">if </span>length > longest_length { |
| longest = start; |
| longest_length = length; |
| } |
| } |
| }; |
| ); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">8 </span>{ |
| <span class="kw">if </span>pieces[i <span class="kw">as </span>usize] == <span class="number">0 </span>{ |
| <span class="kw">if </span>start < <span class="number">0 </span>{ |
| start = i; |
| } |
| } <span class="kw">else </span>{ |
| <span class="macro">finish_sequence!</span>(i); |
| start = -<span class="number">1</span>; |
| } |
| } |
| <span class="macro">finish_sequence!</span>(<span class="number">8</span>); |
| <span class="comment">// https://url.spec.whatwg.org/#concept-ipv6-serializer |
| // step 3: ignore lone zeroes |
| </span><span class="kw">if </span>longest_length < <span class="number">2 </span>{ |
| (-<span class="number">1</span>, -<span class="number">2</span>) |
| } <span class="kw">else </span>{ |
| (longest, longest + longest_length) |
| } |
| } |
| |
| <span class="doccomment">/// <https://url.spec.whatwg.org/#ends-in-a-number-checker> |
| </span><span class="kw">fn </span>ends_in_a_number(input: <span class="kw-2">&</span>str) -> bool { |
| <span class="kw">let </span><span class="kw-2">mut </span>parts = input.rsplit(<span class="string">'.'</span>); |
| <span class="kw">let </span>last = parts.next().unwrap(); |
| <span class="kw">let </span>last = <span class="kw">if </span>last.is_empty() { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(last) = parts.next() { |
| last |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| } <span class="kw">else </span>{ |
| last |
| }; |
| <span class="kw">if </span>!last.is_empty() && last.chars().all(|c| (<span class="string">'0'</span>..=<span class="string">'9'</span>).contains(<span class="kw-2">&</span>c)) { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| |
| parse_ipv4number(last).is_ok() |
| } |
| |
| <span class="doccomment">/// <https://url.spec.whatwg.org/#ipv4-number-parser> |
| /// Ok(None) means the input is a valid number, but it overflows a `u32`. |
| </span><span class="kw">fn </span>parse_ipv4number(<span class="kw-2">mut </span>input: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><<span class="prelude-ty">Option</span><u32>, ()> { |
| <span class="kw">if </span>input.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(()); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>r = <span class="number">10</span>; |
| <span class="kw">if </span>input.starts_with(<span class="string">"0x"</span>) || input.starts_with(<span class="string">"0X"</span>) { |
| input = <span class="kw-2">&</span>input[<span class="number">2</span>..]; |
| r = <span class="number">16</span>; |
| } <span class="kw">else if </span>input.len() >= <span class="number">2 </span>&& input.starts_with(<span class="string">'0'</span>) { |
| input = <span class="kw-2">&</span>input[<span class="number">1</span>..]; |
| r = <span class="number">8</span>; |
| } |
| |
| <span class="kw">if </span>input.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(<span class="number">0</span>)); |
| } |
| |
| <span class="kw">let </span>valid_number = <span class="kw">match </span>r { |
| <span class="number">8 </span>=> input.chars().all(|c| (<span class="string">'0'</span>..=<span class="string">'7'</span>).contains(<span class="kw-2">&</span>c)), |
| <span class="number">10 </span>=> input.chars().all(|c| (<span class="string">'0'</span>..=<span class="string">'9'</span>).contains(<span class="kw-2">&</span>c)), |
| <span class="number">16 </span>=> input.chars().all(|c| { |
| (<span class="string">'0'</span>..=<span class="string">'9'</span>).contains(<span class="kw-2">&</span>c) || (<span class="string">'a'</span>..=<span class="string">'f'</span>).contains(<span class="kw-2">&</span>c) || (<span class="string">'A'</span>..=<span class="string">'F'</span>).contains(<span class="kw-2">&</span>c) |
| }), |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| }; |
| <span class="kw">if </span>!valid_number { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(()); |
| } |
| |
| <span class="kw">match </span>u32::from_str_radix(input, r) { |
| <span class="prelude-val">Ok</span>(num) => <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(num)), |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>), <span class="comment">// The only possible error kind here is an integer overflow. |
| // The validity of the chars in the input is checked above. |
| </span>} |
| } |
| |
| <span class="doccomment">/// <https://url.spec.whatwg.org/#concept-ipv4-parser> |
| </span><span class="kw">fn </span>parse_ipv4addr(input: <span class="kw-2">&</span>str) -> ParseResult<Ipv4Addr> { |
| <span class="kw">let </span><span class="kw-2">mut </span>parts: Vec<<span class="kw-2">&</span>str> = input.split(<span class="string">'.'</span>).collect(); |
| <span class="kw">if </span>parts.last() == <span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="string">""</span>) { |
| parts.pop(); |
| } |
| <span class="kw">if </span>parts.len() > <span class="number">4 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv4Address); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>numbers: Vec<u32> = Vec::new(); |
| <span class="kw">for </span>part <span class="kw">in </span>parts { |
| <span class="kw">match </span>parse_ipv4number(part) { |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(n)) => numbers.push(n), |
| <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>) => <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv4Address), <span class="comment">// u32 overflow |
| </span><span class="prelude-val">Err</span>(()) => <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv4Address), |
| }; |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>ipv4 = numbers.pop().expect(<span class="string">"a non-empty list of numbers"</span>); |
| <span class="comment">// Equivalent to: ipv4 >= 256 ** (4 − numbers.len()) |
| </span><span class="kw">if </span>ipv4 > u32::max_value() >> (<span class="number">8 </span>* numbers.len() <span class="kw">as </span>u32) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv4Address); |
| } |
| <span class="kw">if </span>numbers.iter().any(|x| <span class="kw-2">*</span>x > <span class="number">255</span>) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv4Address); |
| } |
| <span class="kw">for </span>(counter, n) <span class="kw">in </span>numbers.iter().enumerate() { |
| ipv4 += n << (<span class="number">8 </span>* (<span class="number">3 </span>- counter <span class="kw">as </span>u32)) |
| } |
| <span class="prelude-val">Ok</span>(Ipv4Addr::from(ipv4)) |
| } |
| |
| <span class="doccomment">/// <https://url.spec.whatwg.org/#concept-ipv6-parser> |
| </span><span class="kw">fn </span>parse_ipv6addr(input: <span class="kw-2">&</span>str) -> ParseResult<Ipv6Addr> { |
| <span class="kw">let </span>input = input.as_bytes(); |
| <span class="kw">let </span>len = input.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>is_ip_v4 = <span class="bool-val">false</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>pieces = [<span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>, <span class="number">0</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>piece_pointer = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>compress_pointer = <span class="prelude-val">None</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>i = <span class="number">0</span>; |
| |
| <span class="kw">if </span>len < <span class="number">2 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| |
| <span class="kw">if </span>input[<span class="number">0</span>] == <span class="string">b':' </span>{ |
| <span class="kw">if </span>input[<span class="number">1</span>] != <span class="string">b':' </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| i = <span class="number">2</span>; |
| piece_pointer = <span class="number">1</span>; |
| compress_pointer = <span class="prelude-val">Some</span>(<span class="number">1</span>); |
| } |
| |
| <span class="kw">while </span>i < len { |
| <span class="kw">if </span>piece_pointer == <span class="number">8 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| <span class="kw">if </span>input[i] == <span class="string">b':' </span>{ |
| <span class="kw">if </span>compress_pointer.is_some() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| i += <span class="number">1</span>; |
| piece_pointer += <span class="number">1</span>; |
| compress_pointer = <span class="prelude-val">Some</span>(piece_pointer); |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">let </span>start = i; |
| <span class="kw">let </span>end = cmp::min(len, start + <span class="number">4</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>value = <span class="number">0u16</span>; |
| <span class="kw">while </span>i < end { |
| <span class="kw">match </span>(input[i] <span class="kw">as </span>char).to_digit(<span class="number">16</span>) { |
| <span class="prelude-val">Some</span>(digit) => { |
| value = value * <span class="number">0x10 </span>+ digit <span class="kw">as </span>u16; |
| i += <span class="number">1</span>; |
| } |
| <span class="prelude-val">None </span>=> <span class="kw">break</span>, |
| } |
| } |
| <span class="kw">if </span>i < len { |
| <span class="kw">match </span>input[i] { |
| <span class="string">b'.' </span>=> { |
| <span class="kw">if </span>i == start { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| i = start; |
| <span class="kw">if </span>piece_pointer > <span class="number">6 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| is_ip_v4 = <span class="bool-val">true</span>; |
| } |
| <span class="string">b':' </span>=> { |
| i += <span class="number">1</span>; |
| <span class="kw">if </span>i == len { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| } |
| <span class="kw">_ </span>=> <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address), |
| } |
| } |
| <span class="kw">if </span>is_ip_v4 { |
| <span class="kw">break</span>; |
| } |
| pieces[piece_pointer] = value; |
| piece_pointer += <span class="number">1</span>; |
| } |
| |
| <span class="kw">if </span>is_ip_v4 { |
| <span class="kw">if </span>piece_pointer > <span class="number">6 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>numbers_seen = <span class="number">0</span>; |
| <span class="kw">while </span>i < len { |
| <span class="kw">if </span>numbers_seen > <span class="number">0 </span>{ |
| <span class="kw">if </span>numbers_seen < <span class="number">4 </span>&& (i < len && input[i] == <span class="string">b'.'</span>) { |
| i += <span class="number">1 |
| </span>} <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ipv4_piece = <span class="prelude-val">None</span>; |
| <span class="kw">while </span>i < len { |
| <span class="kw">let </span>digit = <span class="kw">match </span>input[i] { |
| c @ <span class="string">b'0'</span>..=<span class="string">b'9' </span>=> c - <span class="string">b'0'</span>, |
| <span class="kw">_ </span>=> <span class="kw">break</span>, |
| }; |
| <span class="kw">match </span>ipv4_piece { |
| <span class="prelude-val">None </span>=> ipv4_piece = <span class="prelude-val">Some</span>(digit <span class="kw">as </span>u16), |
| <span class="prelude-val">Some</span>(<span class="number">0</span>) => <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address), <span class="comment">// No leading zero |
| </span><span class="prelude-val">Some</span>(<span class="kw-2">ref mut </span>v) => { |
| <span class="kw-2">*</span>v = <span class="kw-2">*</span>v * <span class="number">10 </span>+ digit <span class="kw">as </span>u16; |
| <span class="kw">if </span><span class="kw-2">*</span>v > <span class="number">255 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| } |
| } |
| i += <span class="number">1</span>; |
| } |
| |
| pieces[piece_pointer] = <span class="kw">if let </span><span class="prelude-val">Some</span>(v) = ipv4_piece { |
| pieces[piece_pointer] * <span class="number">0x100 </span>+ v |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| }; |
| numbers_seen += <span class="number">1</span>; |
| |
| <span class="kw">if </span>numbers_seen == <span class="number">2 </span>|| numbers_seen == <span class="number">4 </span>{ |
| piece_pointer += <span class="number">1</span>; |
| } |
| } |
| |
| <span class="kw">if </span>numbers_seen != <span class="number">4 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| } |
| |
| <span class="kw">if </span>i < len { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| |
| <span class="kw">match </span>compress_pointer { |
| <span class="prelude-val">Some</span>(compress_pointer) => { |
| <span class="kw">let </span><span class="kw-2">mut </span>swaps = piece_pointer - compress_pointer; |
| piece_pointer = <span class="number">7</span>; |
| <span class="kw">while </span>swaps > <span class="number">0 </span>{ |
| pieces.swap(piece_pointer, compress_pointer + swaps - <span class="number">1</span>); |
| swaps -= <span class="number">1</span>; |
| piece_pointer -= <span class="number">1</span>; |
| } |
| } |
| <span class="kw">_ </span>=> { |
| <span class="kw">if </span>piece_pointer != <span class="number">8 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(ParseError::InvalidIpv6Address); |
| } |
| } |
| } |
| <span class="prelude-val">Ok</span>(Ipv6Addr::new( |
| pieces[<span class="number">0</span>], pieces[<span class="number">1</span>], pieces[<span class="number">2</span>], pieces[<span class="number">3</span>], pieces[<span class="number">4</span>], pieces[<span class="number">5</span>], pieces[<span class="number">6</span>], pieces[<span class="number">7</span>], |
| )) |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="url" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
