| <!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/hex-0.4.3/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.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="../../hex/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="../../hex/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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| <span id="521">521</span> |
| <span id="522">522</span> |
| <span id="523">523</span> |
| <span id="524">524</span> |
| <span id="525">525</span> |
| </pre><pre class="rust"><code><span class="comment">// Copyright (c) 2013-2014 The Rust Project Developers. |
| // Copyright (c) 2015-2020 The rust-hex 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="doccomment">//! Encoding and decoding hex strings. |
| //! |
| //! For most cases, you can simply use the [`decode`], [`encode`] and |
| //! [`encode_upper`] functions. If you need a bit more control, use the traits |
| //! [`ToHex`] and [`FromHex`] instead. |
| //! |
| //! # Example |
| //! |
| //! ``` |
| //! # #[cfg(not(feature = "alloc"))] |
| //! # let mut output = [0; 0x18]; |
| //! # |
| //! # #[cfg(not(feature = "alloc"))] |
| //! # hex::encode_to_slice(b"Hello world!", &mut output).unwrap(); |
| //! # |
| //! # #[cfg(not(feature = "alloc"))] |
| //! # let hex_string = ::core::str::from_utf8(&output).unwrap(); |
| //! # |
| //! # #[cfg(feature = "alloc")] |
| //! let hex_string = hex::encode("Hello world!"); |
| //! |
| //! println!("{}", hex_string); // Prints "48656c6c6f20776f726c6421" |
| //! |
| //! # assert_eq!(hex_string, "48656c6c6f20776f726c6421"); |
| //! ``` |
| |
| </span><span class="attribute">#![doc(html_root_url = <span class="string">"https://docs.rs/hex/0.4.3"</span>)] |
| #![cfg_attr(not(feature = <span class="string">"std"</span>), no_std)] |
| #![cfg_attr(docsrs, feature(doc_cfg))] |
| #![allow(clippy::unreadable_literal)] |
| |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">extern crate </span>alloc; |
| <span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">use </span>alloc::{string::String, vec::Vec}; |
| |
| <span class="kw">use </span>core::iter; |
| |
| <span class="kw">mod </span>error; |
| <span class="kw">pub use </span><span class="kw">crate</span>::error::FromHexError; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| #[cfg_attr(docsrs, doc(cfg(feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">pub mod </span>serde; |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">pub use </span><span class="kw">crate</span>::serde::deserialize; |
| <span class="attribute">#[cfg(all(feature = <span class="string">"alloc"</span>, feature = <span class="string">"serde"</span>))] |
| </span><span class="kw">pub use </span><span class="kw">crate</span>::serde::{serialize, serialize_upper}; |
| |
| <span class="doccomment">/// Encoding values as hex string. |
| /// |
| /// This trait is implemented for all `T` which implement `AsRef<[u8]>`. This |
| /// includes `String`, `str`, `Vec<u8>` and `[u8]`. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use hex::ToHex; |
| /// |
| /// println!("{}", "Hello world!".encode_hex::<String>()); |
| /// # assert_eq!("Hello world!".encode_hex::<String>(), "48656c6c6f20776f726c6421".to_string()); |
| /// ``` |
| /// |
| /// *Note*: instead of using this trait, you might want to use [`encode()`]. |
| </span><span class="kw">pub trait </span>ToHex { |
| <span class="doccomment">/// Encode the hex strict representing `self` into the result. Lower case |
| /// letters are used (e.g. `f9b4ca`) |
| </span><span class="kw">fn </span>encode_hex<T: iter::FromIterator<char>>(<span class="kw-2">&</span><span class="self">self</span>) -> T; |
| |
| <span class="doccomment">/// Encode the hex strict representing `self` into the result. Upper case |
| /// letters are used (e.g. `F9B4CA`) |
| </span><span class="kw">fn </span>encode_hex_upper<T: iter::FromIterator<char>>(<span class="kw-2">&</span><span class="self">self</span>) -> T; |
| } |
| |
| <span class="kw">const </span>HEX_CHARS_LOWER: <span class="kw-2">&</span>[u8; <span class="number">16</span>] = <span class="string">b"0123456789abcdef"</span>; |
| <span class="kw">const </span>HEX_CHARS_UPPER: <span class="kw-2">&</span>[u8; <span class="number">16</span>] = <span class="string">b"0123456789ABCDEF"</span>; |
| |
| <span class="kw">struct </span>BytesToHexChars<<span class="lifetime">'a</span>> { |
| inner: ::core::slice::Iter<<span class="lifetime">'a</span>, u8>, |
| table: <span class="kw-2">&</span><span class="lifetime">'static </span>[u8; <span class="number">16</span>], |
| next: <span class="prelude-ty">Option</span><char>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> BytesToHexChars<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>new(inner: <span class="kw-2">&</span><span class="lifetime">'a </span>[u8], table: <span class="kw-2">&</span><span class="lifetime">'static </span>[u8; <span class="number">16</span>]) -> BytesToHexChars<<span class="lifetime">'a</span>> { |
| BytesToHexChars { |
| inner: inner.iter(), |
| table, |
| next: <span class="prelude-val">None</span>, |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Iterator <span class="kw">for </span>BytesToHexChars<<span class="lifetime">'a</span>> { |
| <span class="kw">type </span>Item = char; |
| |
| <span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="kw">match </span><span class="self">self</span>.next.take() { |
| <span class="prelude-val">Some</span>(current) => <span class="prelude-val">Some</span>(current), |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.inner.next().map(|byte| { |
| <span class="kw">let </span>current = <span class="self">self</span>.table[(byte >> <span class="number">4</span>) <span class="kw">as </span>usize] <span class="kw">as </span>char; |
| <span class="self">self</span>.next = <span class="prelude-val">Some</span>(<span class="self">self</span>.table[(byte & <span class="number">0x0F</span>) <span class="kw">as </span>usize] <span class="kw">as </span>char); |
| current |
| }), |
| } |
| } |
| |
| <span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="kw">let </span>length = <span class="self">self</span>.len(); |
| (length, <span class="prelude-val">Some</span>(length)) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> iter::ExactSizeIterator <span class="kw">for </span>BytesToHexChars<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>length = <span class="self">self</span>.inner.len() * <span class="number">2</span>; |
| <span class="kw">if </span><span class="self">self</span>.next.is_some() { |
| length += <span class="number">1</span>; |
| } |
| length |
| } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>encode_to_iter<T: iter::FromIterator<char>>(table: <span class="kw-2">&</span><span class="lifetime">'static </span>[u8; <span class="number">16</span>], source: <span class="kw-2">&</span>[u8]) -> T { |
| BytesToHexChars::new(source, table).collect() |
| } |
| |
| <span class="kw">impl</span><T: AsRef<[u8]>> ToHex <span class="kw">for </span>T { |
| <span class="kw">fn </span>encode_hex<U: iter::FromIterator<char>>(<span class="kw-2">&</span><span class="self">self</span>) -> U { |
| encode_to_iter(HEX_CHARS_LOWER, <span class="self">self</span>.as_ref()) |
| } |
| |
| <span class="kw">fn </span>encode_hex_upper<U: iter::FromIterator<char>>(<span class="kw-2">&</span><span class="self">self</span>) -> U { |
| encode_to_iter(HEX_CHARS_UPPER, <span class="self">self</span>.as_ref()) |
| } |
| } |
| |
| <span class="doccomment">/// Types that can be decoded from a hex string. |
| /// |
| /// This trait is implemented for `Vec<u8>` and small `u8`-arrays. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// use core::str; |
| /// use hex::FromHex; |
| /// |
| /// let buffer = <[u8; 12]>::from_hex("48656c6c6f20776f726c6421")?; |
| /// let string = str::from_utf8(&buffer).expect("invalid buffer length"); |
| /// |
| /// println!("{}", string); // prints "Hello world!" |
| /// # assert_eq!("Hello world!", string); |
| /// # Ok::<(), hex::FromHexError>(()) |
| /// ``` |
| </span><span class="kw">pub trait </span>FromHex: Sized { |
| <span class="kw">type </span>Error; |
| |
| <span class="doccomment">/// Creates an instance of type `Self` from the given hex string, or fails |
| /// with a custom error type. |
| /// |
| /// Both, upper and lower case characters are valid and can even be |
| /// mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings). |
| </span><span class="kw">fn </span>from_hex<T: AsRef<[u8]>>(hex: T) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Error>; |
| } |
| |
| <span class="kw">fn </span>val(c: u8, idx: usize) -> <span class="prelude-ty">Result</span><u8, FromHexError> { |
| <span class="kw">match </span>c { |
| <span class="string">b'A'</span>..=<span class="string">b'F' </span>=> <span class="prelude-val">Ok</span>(c - <span class="string">b'A' </span>+ <span class="number">10</span>), |
| <span class="string">b'a'</span>..=<span class="string">b'f' </span>=> <span class="prelude-val">Ok</span>(c - <span class="string">b'a' </span>+ <span class="number">10</span>), |
| <span class="string">b'0'</span>..=<span class="string">b'9' </span>=> <span class="prelude-val">Ok</span>(c - <span class="string">b'0'</span>), |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(FromHexError::InvalidHexCharacter { |
| c: c <span class="kw">as </span>char, |
| index: idx, |
| }), |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">impl </span>FromHex <span class="kw">for </span>Vec<u8> { |
| <span class="kw">type </span>Error = FromHexError; |
| |
| <span class="kw">fn </span>from_hex<T: AsRef<[u8]>>(hex: T) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Error> { |
| <span class="kw">let </span>hex = hex.as_ref(); |
| <span class="kw">if </span>hex.len() % <span class="number">2 </span>!= <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(FromHexError::OddLength); |
| } |
| |
| hex.chunks(<span class="number">2</span>) |
| .enumerate() |
| .map(|(i, pair)| <span class="prelude-val">Ok</span>(val(pair[<span class="number">0</span>], <span class="number">2 </span>* i)<span class="question-mark">? </span><< <span class="number">4 </span>| val(pair[<span class="number">1</span>], <span class="number">2 </span>* i + <span class="number">1</span>)<span class="question-mark">?</span>)) |
| .collect() |
| } |
| } |
| |
| <span class="comment">// Helper macro to implement the trait for a few fixed sized arrays. Once Rust |
| // has type level integers, this should be removed. |
| </span><span class="macro">macro_rules! </span>from_hex_array_impl { |
| ($(<span class="macro-nonterminal">$len</span>:expr)+) => {$( |
| <span class="kw">impl </span>FromHex <span class="kw">for </span>[u8; <span class="macro-nonterminal">$len</span>] { |
| <span class="kw">type </span>Error = FromHexError; |
| |
| <span class="kw">fn </span>from_hex<T: AsRef<[u8]>>(hex: T) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Error> { |
| <span class="kw">let </span><span class="kw-2">mut </span>out = [<span class="number">0_u8</span>; <span class="macro-nonterminal">$len</span>]; |
| decode_to_slice(hex, <span class="kw-2">&mut </span>out <span class="kw">as </span><span class="kw-2">&mut </span>[u8])<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(out) |
| } |
| } |
| )+} |
| } |
| |
| <span class="macro">from_hex_array_impl! </span>{ |
| <span class="number">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
| 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
| 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 |
| 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 |
| 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 |
| 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 |
| 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 |
| 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 |
| 160 192 200 224 256 384 512 768 1024 2048 4096 8192 16384 32768 |
| </span>} |
| |
| <span class="attribute">#[cfg(any(target_pointer_width = <span class="string">"32"</span>, target_pointer_width = <span class="string">"64"</span>))] |
| </span><span class="macro">from_hex_array_impl! </span>{ |
| <span class="number">65536 131072 262144 524288 1048576 2097152 4194304 8388608 |
| 16777216 33554432 67108864 134217728 268435456 536870912 |
| 1073741824 2147483648 |
| </span>} |
| |
| <span class="attribute">#[cfg(target_pointer_width = <span class="string">"64"</span>)] |
| </span><span class="macro">from_hex_array_impl! </span>{ |
| <span class="number">4294967296 |
| </span>} |
| |
| <span class="doccomment">/// Encodes `data` as hex string using lowercase characters. |
| /// |
| /// Lowercase characters are used (e.g. `f9b4ca`). The resulting string's |
| /// length is always even, each byte in `data` is always encoded using two hex |
| /// digits. Thus, the resulting string contains exactly twice as many bytes as |
| /// the input data. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// assert_eq!(hex::encode("Hello world!"), "48656c6c6f20776f726c6421"); |
| /// assert_eq!(hex::encode(vec![1, 2, 3, 15, 16]), "0102030f10"); |
| /// ``` |
| </span><span class="attribute">#[must_use] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>encode<T: AsRef<[u8]>>(data: T) -> String { |
| data.encode_hex() |
| } |
| |
| <span class="doccomment">/// Encodes `data` as hex string using uppercase characters. |
| /// |
| /// Apart from the characters' casing, this works exactly like `encode()`. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// assert_eq!(hex::encode_upper("Hello world!"), "48656C6C6F20776F726C6421"); |
| /// assert_eq!(hex::encode_upper(vec![1, 2, 3, 15, 16]), "0102030F10"); |
| /// ``` |
| </span><span class="attribute">#[must_use] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>encode_upper<T: AsRef<[u8]>>(data: T) -> String { |
| data.encode_hex_upper() |
| } |
| |
| <span class="doccomment">/// Decodes a hex string into raw bytes. |
| /// |
| /// Both, upper and lower case characters are valid in the input string and can |
| /// even be mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings). |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// assert_eq!( |
| /// hex::decode("48656c6c6f20776f726c6421"), |
| /// Ok("Hello world!".to_owned().into_bytes()) |
| /// ); |
| /// |
| /// assert_eq!(hex::decode("123"), Err(hex::FromHexError::OddLength)); |
| /// assert!(hex::decode("foo").is_err()); |
| /// ``` |
| </span><span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>decode<T: AsRef<[u8]>>(data: T) -> <span class="prelude-ty">Result</span><Vec<u8>, FromHexError> { |
| FromHex::from_hex(data) |
| } |
| |
| <span class="doccomment">/// Decode a hex string into a mutable bytes slice. |
| /// |
| /// Both, upper and lower case characters are valid in the input string and can |
| /// even be mixed (e.g. `f9b4ca`, `F9B4CA` and `f9B4Ca` are all valid strings). |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// let mut bytes = [0u8; 4]; |
| /// assert_eq!(hex::decode_to_slice("6b697769", &mut bytes as &mut [u8]), Ok(())); |
| /// assert_eq!(&bytes, b"kiwi"); |
| /// ``` |
| </span><span class="kw">pub fn </span>decode_to_slice<T: AsRef<[u8]>>(data: T, out: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><(), FromHexError> { |
| <span class="kw">let </span>data = data.as_ref(); |
| |
| <span class="kw">if </span>data.len() % <span class="number">2 </span>!= <span class="number">0 </span>{ |
| <span class="kw">return </span><span class="prelude-val">Err</span>(FromHexError::OddLength); |
| } |
| <span class="kw">if </span>data.len() / <span class="number">2 </span>!= out.len() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(FromHexError::InvalidStringLength); |
| } |
| |
| <span class="kw">for </span>(i, byte) <span class="kw">in </span>out.iter_mut().enumerate() { |
| <span class="kw-2">*</span>byte = val(data[<span class="number">2 </span>* i], <span class="number">2 </span>* i)<span class="question-mark">? </span><< <span class="number">4 </span>| val(data[<span class="number">2 </span>* i + <span class="number">1</span>], <span class="number">2 </span>* i + <span class="number">1</span>)<span class="question-mark">?</span>; |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="comment">// generates an iterator like this |
| // (0, 1) |
| // (2, 3) |
| // (4, 5) |
| // (6, 7) |
| // ... |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">fn </span>generate_iter(len: usize) -> <span class="kw">impl </span>Iterator<Item = (usize, usize)> { |
| (<span class="number">0</span>..len).step_by(<span class="number">2</span>).zip((<span class="number">0</span>..len).skip(<span class="number">1</span>).step_by(<span class="number">2</span>)) |
| } |
| |
| <span class="comment">// the inverse of `val`. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>byte2hex(byte: u8, table: <span class="kw-2">&</span>[u8; <span class="number">16</span>]) -> (u8, u8) { |
| <span class="kw">let </span>high = table[((byte & <span class="number">0xf0</span>) >> <span class="number">4</span>) <span class="kw">as </span>usize]; |
| <span class="kw">let </span>low = table[(byte & <span class="number">0x0f</span>) <span class="kw">as </span>usize]; |
| |
| (high, low) |
| } |
| |
| <span class="doccomment">/// Encodes some bytes into a mutable slice of bytes. |
| /// |
| /// The output buffer, has to be able to hold at least `input.len() * 2` bytes, |
| /// otherwise this function will return an error. |
| /// |
| /// # Example |
| /// |
| /// ``` |
| /// # use hex::FromHexError; |
| /// # fn main() -> Result<(), FromHexError> { |
| /// let mut bytes = [0u8; 4 * 2]; |
| /// |
| /// hex::encode_to_slice(b"kiwi", &mut bytes)?; |
| /// assert_eq!(&bytes, b"6b697769"); |
| /// # Ok(()) |
| /// # } |
| /// ``` |
| </span><span class="kw">pub fn </span>encode_to_slice<T: AsRef<[u8]>>(input: T, output: <span class="kw-2">&mut </span>[u8]) -> <span class="prelude-ty">Result</span><(), FromHexError> { |
| <span class="kw">if </span>input.as_ref().len() * <span class="number">2 </span>!= output.len() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(FromHexError::InvalidStringLength); |
| } |
| |
| <span class="kw">for </span>(byte, (i, j)) <span class="kw">in </span>input |
| .as_ref() |
| .iter() |
| .zip(generate_iter(input.as_ref().len() * <span class="number">2</span>)) |
| { |
| <span class="kw">let </span>(high, low) = byte2hex(<span class="kw-2">*</span>byte, HEX_CHARS_LOWER); |
| output[i] = high; |
| output[j] = low; |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">use </span>alloc::string::ToString; |
| <span class="kw">use </span>pretty_assertions::assert_eq; |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">fn </span>test_gen_iter() { |
| <span class="kw">let </span>result = <span class="macro">vec!</span>[(<span class="number">0</span>, <span class="number">1</span>), (<span class="number">2</span>, <span class="number">3</span>)]; |
| |
| <span class="macro">assert_eq!</span>(generate_iter(<span class="number">5</span>).collect::<Vec<<span class="kw">_</span>>>(), result); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_encode_to_slice() { |
| <span class="kw">let </span><span class="kw-2">mut </span>output_1 = [<span class="number">0</span>; <span class="number">4 </span>* <span class="number">2</span>]; |
| encode_to_slice(<span class="string">b"kiwi"</span>, <span class="kw-2">&mut </span>output_1).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>output_1, <span class="string">b"6b697769"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>output_2 = [<span class="number">0</span>; <span class="number">5 </span>* <span class="number">2</span>]; |
| encode_to_slice(<span class="string">b"kiwis"</span>, <span class="kw-2">&mut </span>output_2).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>output_2, <span class="string">b"6b69776973"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>output_3 = [<span class="number">0</span>; <span class="number">100</span>]; |
| |
| <span class="macro">assert_eq!</span>( |
| encode_to_slice(<span class="string">b"kiwis"</span>, <span class="kw-2">&mut </span>output_3), |
| <span class="prelude-val">Err</span>(FromHexError::InvalidStringLength) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_decode_to_slice() { |
| <span class="kw">let </span><span class="kw-2">mut </span>output_1 = [<span class="number">0</span>; <span class="number">4</span>]; |
| decode_to_slice(<span class="string">b"6b697769"</span>, <span class="kw-2">&mut </span>output_1).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>output_1, <span class="string">b"kiwi"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>output_2 = [<span class="number">0</span>; <span class="number">5</span>]; |
| decode_to_slice(<span class="string">b"6b69776973"</span>, <span class="kw-2">&mut </span>output_2).unwrap(); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&</span>output_2, <span class="string">b"kiwis"</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>output_3 = [<span class="number">0</span>; <span class="number">4</span>]; |
| |
| <span class="macro">assert_eq!</span>( |
| decode_to_slice(<span class="string">b"6"</span>, <span class="kw-2">&mut </span>output_3), |
| <span class="prelude-val">Err</span>(FromHexError::OddLength) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">fn </span>test_encode() { |
| <span class="macro">assert_eq!</span>(encode(<span class="string">"foobar"</span>), <span class="string">"666f6f626172"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">fn </span>test_decode() { |
| <span class="macro">assert_eq!</span>( |
| decode(<span class="string">"666f6f626172"</span>), |
| <span class="prelude-val">Ok</span>(String::from(<span class="string">"foobar"</span>).into_bytes()) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_from_hex_okay_str() { |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">"666f6f626172"</span>).unwrap(), <span class="string">b"foobar"</span>); |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">"666F6F626172"</span>).unwrap(), <span class="string">b"foobar"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_from_hex_okay_bytes() { |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">b"666f6f626172"</span>).unwrap(), <span class="string">b"foobar"</span>); |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">b"666F6F626172"</span>).unwrap(), <span class="string">b"foobar"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_invalid_length() { |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">"1"</span>).unwrap_err(), FromHexError::OddLength); |
| <span class="macro">assert_eq!</span>( |
| Vec::from_hex(<span class="string">"666f6f6261721"</span>).unwrap_err(), |
| FromHexError::OddLength |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_invalid_char() { |
| <span class="macro">assert_eq!</span>( |
| Vec::from_hex(<span class="string">"66ag"</span>).unwrap_err(), |
| FromHexError::InvalidHexCharacter { c: <span class="string">'g'</span>, index: <span class="number">3 </span>} |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_empty() { |
| <span class="macro">assert_eq!</span>(Vec::from_hex(<span class="string">""</span>).unwrap(), <span class="string">b""</span>); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">pub fn </span>test_from_hex_whitespace() { |
| <span class="macro">assert_eq!</span>( |
| Vec::from_hex(<span class="string">"666f 6f62617"</span>).unwrap_err(), |
| FromHexError::InvalidHexCharacter { c: <span class="string">' '</span>, index: <span class="number">4 </span>} |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">pub fn </span>test_from_hex_array() { |
| <span class="macro">assert_eq!</span>( |
| <[u8; <span class="number">6</span>] <span class="kw">as </span>FromHex>::from_hex(<span class="string">"666f6f626172"</span>), |
| <span class="prelude-val">Ok</span>([<span class="number">0x66</span>, <span class="number">0x6f</span>, <span class="number">0x6f</span>, <span class="number">0x62</span>, <span class="number">0x61</span>, <span class="number">0x72</span>]) |
| ); |
| |
| <span class="macro">assert_eq!</span>( |
| <[u8; <span class="number">5</span>] <span class="kw">as </span>FromHex>::from_hex(<span class="string">"666f6f626172"</span>), |
| <span class="prelude-val">Err</span>(FromHexError::InvalidStringLength) |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">fn </span>test_to_hex() { |
| <span class="macro">assert_eq!</span>( |
| [<span class="number">0x66</span>, <span class="number">0x6f</span>, <span class="number">0x6f</span>, <span class="number">0x62</span>, <span class="number">0x61</span>, <span class="number">0x72</span>].encode_hex::<String>(), |
| <span class="string">"666f6f626172"</span>.to_string(), |
| ); |
| |
| <span class="macro">assert_eq!</span>( |
| [<span class="number">0x66</span>, <span class="number">0x6f</span>, <span class="number">0x6f</span>, <span class="number">0x62</span>, <span class="number">0x61</span>, <span class="number">0x72</span>].encode_hex_upper::<String>(), |
| <span class="string">"666F6F626172"</span>.to_string(), |
| ); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="hex" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
