| <!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/git/checkouts/tantivy-65d0bbbddbbd5d02/433372d/common/src/serialize.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>serialize.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="../../tantivy_common/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="../../tantivy_common/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::{Read, Write}; |
| <span class="kw">use </span>std::{fmt, io}; |
| |
| <span class="kw">use </span>byteorder::{ReadBytesExt, WriteBytesExt}; |
| |
| <span class="kw">use crate</span>::{Endianness, VInt}; |
| |
| <span class="doccomment">/// Trait for a simple binary serialization. |
| </span><span class="kw">pub trait </span>BinarySerializable: fmt::Debug + Sized { |
| <span class="doccomment">/// Serialize |
| </span><span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()>; |
| <span class="doccomment">/// Deserialize |
| </span><span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>>; |
| } |
| |
| <span class="kw">pub trait </span>DeserializeFrom<T: BinarySerializable> { |
| <span class="kw">fn </span>deserialize(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<T>; |
| } |
| |
| <span class="doccomment">/// Implement deserialize from &[u8] for all types which implement BinarySerializable. |
| /// |
| /// TryFrom would actually be preferable, but not possible because of the orphan |
| /// rules (not completely sure if this could be resolved) |
| </span><span class="kw">impl</span><T: BinarySerializable> DeserializeFrom<T> <span class="kw">for </span><span class="kw-2">&</span>[u8] { |
| <span class="kw">fn </span>deserialize(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<T> { |
| T::deserialize(<span class="self">self</span>) |
| } |
| } |
| |
| <span class="doccomment">/// `FixedSize` marks a `BinarySerializable` as |
| /// always serializing to the same size. |
| </span><span class="kw">pub trait </span>FixedSize: BinarySerializable { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>() { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(<span class="kw">_</span>: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>() { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">0</span>; |
| } |
| |
| <span class="kw">impl</span><T: BinarySerializable> BinarySerializable <span class="kw">for </span>Vec<T> { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| VInt(<span class="self">self</span>.len() <span class="kw">as </span>u64).serialize(writer)<span class="question-mark">?</span>; |
| <span class="kw">for </span>it <span class="kw">in </span><span class="self">self </span>{ |
| it.serialize(writer)<span class="question-mark">?</span>; |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<Vec<T>> { |
| <span class="kw">let </span>num_items = VInt::deserialize(reader)<span class="question-mark">?</span>.val(); |
| <span class="kw">let </span><span class="kw-2">mut </span>items: Vec<T> = Vec::with_capacity(num_items <span class="kw">as </span>usize); |
| <span class="kw">for _ in </span><span class="number">0</span>..num_items { |
| <span class="kw">let </span>item = T::deserialize(reader)<span class="question-mark">?</span>; |
| items.push(item); |
| } |
| <span class="prelude-val">Ok</span>(items) |
| } |
| } |
| |
| <span class="kw">impl</span><Left: BinarySerializable, Right: BinarySerializable> BinarySerializable <span class="kw">for </span>(Left, Right) { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, write: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| <span class="self">self</span>.<span class="number">0</span>.serialize(write)<span class="question-mark">?</span>; |
| <span class="self">self</span>.<span class="number">1</span>.serialize(write) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| <span class="prelude-val">Ok</span>((Left::deserialize(reader)<span class="question-mark">?</span>, Right::deserialize(reader)<span class="question-mark">?</span>)) |
| } |
| } |
| <span class="kw">impl</span><Left: BinarySerializable + FixedSize, Right: BinarySerializable + FixedSize> FixedSize |
| <span class="kw">for </span>(Left, Right) |
| { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = Left::SIZE_IN_BYTES + Right::SIZE_IN_BYTES; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>u32 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u32::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<u32> { |
| reader.read_u32::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>u32 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">4</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>u16 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u16::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<u16> { |
| reader.read_u16::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>u16 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">2</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>u64 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u64::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| reader.read_u64::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>u64 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">8</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>u128 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u128::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| reader.read_u128::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>u128 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">16</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>f32 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_f32::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| reader.read_f32::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>f32 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">4</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>i64 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_i64::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| reader.read_i64::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>i64 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">8</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>f64 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_f64::<Endianness>(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<<span class="self">Self</span>> { |
| reader.read_f64::<Endianness>() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>f64 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">8</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>u8 { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u8(<span class="kw-2">*</span><span class="self">self</span>) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<u8> { |
| reader.read_u8() |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>u8 { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">1</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>bool { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| writer.write_u8(u8::from(<span class="kw-2">*</span><span class="self">self</span>)) |
| } |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<bool> { |
| <span class="kw">let </span>val = reader.read_u8()<span class="question-mark">?</span>; |
| <span class="kw">match </span>val { |
| <span class="number">0 </span>=> <span class="prelude-val">Ok</span>(<span class="bool-val">false</span>), |
| <span class="number">1 </span>=> <span class="prelude-val">Ok</span>(<span class="bool-val">true</span>), |
| <span class="kw">_ </span>=> <span class="prelude-val">Err</span>(io::Error::new( |
| io::ErrorKind::InvalidData, |
| <span class="string">"invalid bool value on deserialization, data corrupted"</span>, |
| )), |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>FixedSize <span class="kw">for </span>bool { |
| <span class="kw">const </span>SIZE_IN_BYTES: usize = <span class="number">1</span>; |
| } |
| |
| <span class="kw">impl </span>BinarySerializable <span class="kw">for </span>String { |
| <span class="kw">fn </span>serialize<W: Write>(<span class="kw-2">&</span><span class="self">self</span>, writer: <span class="kw-2">&mut </span>W) -> io::Result<()> { |
| <span class="kw">let </span>data: <span class="kw-2">&</span>[u8] = <span class="self">self</span>.as_bytes(); |
| VInt(data.len() <span class="kw">as </span>u64).serialize(writer)<span class="question-mark">?</span>; |
| writer.write_all(data) |
| } |
| |
| <span class="kw">fn </span>deserialize<R: Read>(reader: <span class="kw-2">&mut </span>R) -> io::Result<String> { |
| <span class="kw">let </span>string_length = VInt::deserialize(reader)<span class="question-mark">?</span>.val() <span class="kw">as </span>usize; |
| <span class="kw">let </span><span class="kw-2">mut </span>result = String::with_capacity(string_length); |
| reader |
| .take(string_length <span class="kw">as </span>u64) |
| .read_to_string(<span class="kw-2">&mut </span>result)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(result) |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">pub mod </span>test { |
| |
| <span class="kw">use super</span>::{VInt, <span class="kw-2">*</span>}; |
| <span class="kw">use </span><span class="kw">crate</span>::serialize::BinarySerializable; |
| <span class="kw">pub fn </span>fixed_size_test<O: BinarySerializable + FixedSize + Default>() { |
| <span class="kw">let </span><span class="kw-2">mut </span>buffer = Vec::new(); |
| O::default().serialize(<span class="kw-2">&mut </span>buffer).unwrap(); |
| <span class="macro">assert_eq!</span>(buffer.len(), O::SIZE_IN_BYTES); |
| } |
| |
| <span class="kw">fn </span>serialize_test<T: BinarySerializable + Eq>(v: T) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>buffer: Vec<u8> = Vec::new(); |
| v.serialize(<span class="kw-2">&mut </span>buffer).unwrap(); |
| <span class="kw">let </span>num_bytes = buffer.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>cursor = <span class="kw-2">&</span>buffer[..]; |
| <span class="kw">let </span>deser = T::deserialize(<span class="kw-2">&mut </span>cursor).unwrap(); |
| <span class="macro">assert_eq!</span>(deser, v); |
| num_bytes |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_u8() { |
| fixed_size_test::<u8>(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_u32() { |
| fixed_size_test::<u32>(); |
| <span class="macro">assert_eq!</span>(<span class="number">4</span>, serialize_test(<span class="number">3u32</span>)); |
| <span class="macro">assert_eq!</span>(<span class="number">4</span>, serialize_test(<span class="number">5u32</span>)); |
| <span class="macro">assert_eq!</span>(<span class="number">4</span>, serialize_test(u32::MAX)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_i64() { |
| fixed_size_test::<i64>(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_f64() { |
| fixed_size_test::<f64>(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_u64() { |
| fixed_size_test::<u64>(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_bool() { |
| fixed_size_test::<bool>(); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_string() { |
| <span class="macro">assert_eq!</span>(serialize_test(String::from(<span class="string">""</span>)), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(String::from(<span class="string">"ぽよぽよ"</span>)), <span class="number">1 </span>+ <span class="number">3 </span>* <span class="number">4</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(String::from(<span class="string">"富士さん見える。"</span>)), <span class="number">1 </span>+ <span class="number">3 </span>* <span class="number">8</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_vec() { |
| <span class="macro">assert_eq!</span>(serialize_test(Vec::<u8>::new()), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(<span class="macro">vec!</span>[<span class="number">1u32</span>, <span class="number">3u32</span>]), <span class="number">1 </span>+ <span class="number">4 </span>* <span class="number">2</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_serialize_vint() { |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">10_000 </span>{ |
| serialize_test(VInt(i <span class="kw">as </span>u64)); |
| } |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">7u64</span>)), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">127u64</span>)), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">128u64</span>)), <span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">129u64</span>)), <span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">1234u64</span>)), <span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">16_383u64</span>)), <span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(<span class="number">16_384u64</span>)), <span class="number">3</span>); |
| <span class="macro">assert_eq!</span>(serialize_test(VInt(u64::MAX)), <span class="number">10</span>); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="tantivy_common" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
