| <!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/src/positions/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.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/index.html"><div class="logo-container"> |
| <img src="http://fulmicoton.com/tantivy-logo/tantivy-logo.png" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../tantivy/index.html"> |
| <img src="http://fulmicoton.com/tantivy-logo/tantivy-logo.png" 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> |
| <span id="2">2</span> |
| <span id="3">3</span> |
| <span id="4">4</span> |
| <span id="5">5</span> |
| <span id="6">6</span> |
| <span id="7">7</span> |
| <span id="8">8</span> |
| <span id="9">9</span> |
| <span id="10">10</span> |
| <span id="11">11</span> |
| <span id="12">12</span> |
| <span id="13">13</span> |
| <span id="14">14</span> |
| <span id="15">15</span> |
| <span id="16">16</span> |
| <span id="17">17</span> |
| <span id="18">18</span> |
| <span id="19">19</span> |
| <span id="20">20</span> |
| <span id="21">21</span> |
| <span id="22">22</span> |
| <span id="23">23</span> |
| <span id="24">24</span> |
| <span id="25">25</span> |
| <span id="26">26</span> |
| <span id="27">27</span> |
| <span id="28">28</span> |
| <span id="29">29</span> |
| <span id="30">30</span> |
| <span id="31">31</span> |
| <span id="32">32</span> |
| <span id="33">33</span> |
| <span id="34">34</span> |
| <span id="35">35</span> |
| <span id="36">36</span> |
| <span id="37">37</span> |
| <span id="38">38</span> |
| <span id="39">39</span> |
| <span id="40">40</span> |
| <span id="41">41</span> |
| <span id="42">42</span> |
| <span id="43">43</span> |
| <span id="44">44</span> |
| <span id="45">45</span> |
| <span id="46">46</span> |
| <span id="47">47</span> |
| <span id="48">48</span> |
| <span id="49">49</span> |
| <span id="50">50</span> |
| <span id="51">51</span> |
| <span id="52">52</span> |
| <span id="53">53</span> |
| <span id="54">54</span> |
| <span id="55">55</span> |
| <span id="56">56</span> |
| <span id="57">57</span> |
| <span id="58">58</span> |
| <span id="59">59</span> |
| <span id="60">60</span> |
| <span id="61">61</span> |
| <span id="62">62</span> |
| <span id="63">63</span> |
| <span id="64">64</span> |
| <span id="65">65</span> |
| <span id="66">66</span> |
| <span id="67">67</span> |
| <span id="68">68</span> |
| <span id="69">69</span> |
| <span id="70">70</span> |
| <span id="71">71</span> |
| <span id="72">72</span> |
| <span id="73">73</span> |
| <span id="74">74</span> |
| <span id="75">75</span> |
| <span id="76">76</span> |
| <span id="77">77</span> |
| <span id="78">78</span> |
| <span id="79">79</span> |
| <span id="80">80</span> |
| <span id="81">81</span> |
| <span id="82">82</span> |
| <span id="83">83</span> |
| <span id="84">84</span> |
| <span id="85">85</span> |
| <span id="86">86</span> |
| <span id="87">87</span> |
| <span id="88">88</span> |
| <span id="89">89</span> |
| <span id="90">90</span> |
| <span id="91">91</span> |
| <span id="92">92</span> |
| <span id="93">93</span> |
| <span id="94">94</span> |
| <span id="95">95</span> |
| <span id="96">96</span> |
| <span id="97">97</span> |
| <span id="98">98</span> |
| <span id="99">99</span> |
| <span id="100">100</span> |
| <span id="101">101</span> |
| <span id="102">102</span> |
| <span id="103">103</span> |
| <span id="104">104</span> |
| <span id="105">105</span> |
| <span id="106">106</span> |
| <span id="107">107</span> |
| <span id="108">108</span> |
| <span id="109">109</span> |
| <span id="110">110</span> |
| <span id="111">111</span> |
| <span id="112">112</span> |
| <span id="113">113</span> |
| <span id="114">114</span> |
| <span id="115">115</span> |
| <span id="116">116</span> |
| <span id="117">117</span> |
| <span id="118">118</span> |
| <span id="119">119</span> |
| <span id="120">120</span> |
| <span id="121">121</span> |
| <span id="122">122</span> |
| <span id="123">123</span> |
| <span id="124">124</span> |
| <span id="125">125</span> |
| <span id="126">126</span> |
| <span id="127">127</span> |
| <span id="128">128</span> |
| <span id="129">129</span> |
| <span id="130">130</span> |
| <span id="131">131</span> |
| <span id="132">132</span> |
| <span id="133">133</span> |
| <span id="134">134</span> |
| <span id="135">135</span> |
| <span id="136">136</span> |
| <span id="137">137</span> |
| <span id="138">138</span> |
| <span id="139">139</span> |
| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
| <span id="143">143</span> |
| <span id="144">144</span> |
| <span id="145">145</span> |
| <span id="146">146</span> |
| <span id="147">147</span> |
| <span id="148">148</span> |
| <span id="149">149</span> |
| <span id="150">150</span> |
| <span id="151">151</span> |
| <span id="152">152</span> |
| <span id="153">153</span> |
| <span id="154">154</span> |
| <span id="155">155</span> |
| <span id="156">156</span> |
| <span id="157">157</span> |
| <span id="158">158</span> |
| <span id="159">159</span> |
| <span id="160">160</span> |
| <span id="161">161</span> |
| <span id="162">162</span> |
| <span id="163">163</span> |
| <span id="164">164</span> |
| <span id="165">165</span> |
| <span id="166">166</span> |
| <span id="167">167</span> |
| <span id="168">168</span> |
| <span id="169">169</span> |
| <span id="170">170</span> |
| <span id="171">171</span> |
| <span id="172">172</span> |
| <span id="173">173</span> |
| <span id="174">174</span> |
| <span id="175">175</span> |
| <span id="176">176</span> |
| <span id="177">177</span> |
| <span id="178">178</span> |
| <span id="179">179</span> |
| <span id="180">180</span> |
| <span id="181">181</span> |
| <span id="182">182</span> |
| <span id="183">183</span> |
| <span id="184">184</span> |
| <span id="185">185</span> |
| <span id="186">186</span> |
| <span id="187">187</span> |
| <span id="188">188</span> |
| <span id="189">189</span> |
| <span id="190">190</span> |
| <span id="191">191</span> |
| <span id="192">192</span> |
| <span id="193">193</span> |
| <span id="194">194</span> |
| <span id="195">195</span> |
| <span id="196">196</span> |
| <span id="197">197</span> |
| <span id="198">198</span> |
| <span id="199">199</span> |
| <span id="200">200</span> |
| <span id="201">201</span> |
| <span id="202">202</span> |
| <span id="203">203</span> |
| <span id="204">204</span> |
| <span id="205">205</span> |
| <span id="206">206</span> |
| <span id="207">207</span> |
| <span id="208">208</span> |
| <span id="209">209</span> |
| <span id="210">210</span> |
| <span id="211">211</span> |
| <span id="212">212</span> |
| <span id="213">213</span> |
| <span id="214">214</span> |
| <span id="215">215</span> |
| <span id="216">216</span> |
| <span id="217">217</span> |
| <span id="218">218</span> |
| <span id="219">219</span> |
| <span id="220">220</span> |
| <span id="221">221</span> |
| <span id="222">222</span> |
| <span id="223">223</span> |
| <span id="224">224</span> |
| <span id="225">225</span> |
| <span id="226">226</span> |
| <span id="227">227</span> |
| <span id="228">228</span> |
| <span id="229">229</span> |
| <span id="230">230</span> |
| <span id="231">231</span> |
| <span id="232">232</span> |
| <span id="233">233</span> |
| <span id="234">234</span> |
| <span id="235">235</span> |
| <span id="236">236</span> |
| <span id="237">237</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! Tantivy can (if instructed to do so in the schema) store the term positions in a given field. |
| //! This position is expressed as token ordinal. For instance, |
| //! In "The beauty and the beast", the term "the" appears in position 0 and position 3. |
| //! This information is useful to run phrase queries. |
| //! |
| //! The [position](crate::SegmentComponent::Positions) file contains all of the |
| //! bitpacked positions delta, for all terms of a given field, one term after the other. |
| //! |
| //! Each term is encoded independently. |
| //! Like for posting lists, tantivy relies on simd bitpacking to encode the positions delta in |
| //! blocks of 128 deltas. Because we rarely have a multiple of 128, the final block encodes |
| //! the remaining values with variable int encoding. |
| //! |
| //! In order to make reading possible, the term delta positions first encode the number of |
| //! bitpacked blocks, then the bitwidth for each block, then the actual bitpacked blocks and finally |
| //! the final variable int encoded block. |
| //! |
| //! Contrary to postings list, the reader does not have access on the number of positions that is |
| //! encoded, and instead stops decoding the last block when its byte slice has been entirely read. |
| //! |
| //! More formally: |
| //! * *Positions* := *NumBitPackedBlocks* *BitPackedPositionBlock*^(P/128) |
| //! *BitPackedPositionsDeltaBitWidth* *VIntPosDeltas*? |
| //! * *NumBitPackedBlocks**: := *P* / 128 encoded as a variable byte integer. |
| //! * *BitPackedPositionBlock* := bit width encoded block of 128 positions delta |
| //! * *BitPackedPositionsDeltaBitWidth* := (*BitWidth*: u8)^*NumBitPackedBlocks* |
| //! * *VIntPosDeltas* := *VIntPosDelta*^(*P* % 128). |
| //! |
| //! The skip widths encoded separately makes it easy and fast to rapidly skip over n positions. |
| </span><span class="kw">mod </span>reader; |
| <span class="kw">mod </span>serializer; |
| |
| <span class="kw">use </span>bitpacking::{BitPacker, BitPacker4x}; |
| |
| <span class="kw">pub use </span><span class="self">self</span>::reader::PositionReader; |
| <span class="kw">pub use </span><span class="self">self</span>::serializer::PositionSerializer; |
| |
| <span class="kw">const </span>COMPRESSION_BLOCK_SIZE: usize = BitPacker4x::BLOCK_LEN; |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">pub mod </span>tests { |
| |
| <span class="kw">use </span>std::iter; |
| |
| <span class="kw">use </span>proptest::prelude::<span class="kw-2">*</span>; |
| <span class="kw">use </span>proptest::sample::select; |
| |
| <span class="kw">use </span><span class="kw">super</span>::PositionSerializer; |
| <span class="kw">use </span><span class="kw">crate</span>::directory::OwnedBytes; |
| <span class="kw">use </span><span class="kw">crate</span>::positions::reader::PositionReader; |
| |
| <span class="kw">fn </span>create_positions_data(vals: <span class="kw-2">&</span>[u32]) -> <span class="kw">crate</span>::Result<OwnedBytes> { |
| <span class="kw">let </span><span class="kw-2">mut </span>positions_buffer = <span class="macro">vec!</span>[]; |
| <span class="kw">let </span><span class="kw-2">mut </span>serializer = PositionSerializer::new(<span class="kw-2">&mut </span>positions_buffer); |
| serializer.write_positions_delta(vals); |
| serializer.close_term()<span class="question-mark">?</span>; |
| serializer.close()<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(OwnedBytes::new(positions_buffer)) |
| } |
| |
| <span class="kw">fn </span>gen_delta_positions() -> BoxedStrategy<Vec<u32>> { |
| select(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">70</span>, <span class="number">127</span>, <span class="number">128</span>, <span class="number">129</span>, <span class="number">200</span>, <span class="number">255</span>, <span class="number">256</span>, <span class="number">257</span>, <span class="number">270</span>][..]) |
| .prop_flat_map(|num_delta_positions| { |
| proptest::collection::vec( |
| select(<span class="kw-2">&</span>[<span class="number">1u32</span>, <span class="number">2u32</span>, <span class="number">4u32</span>, <span class="number">8u32</span>, <span class="number">16u32</span>][..]), |
| num_delta_positions, |
| ) |
| }) |
| .boxed() |
| } |
| |
| <span class="macro">proptest! </span>{ |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_delta(delta_positions <span class="kw">in </span>gen_delta_positions()) { |
| <span class="kw">let </span>delta_positions_data = create_positions_data(<span class="kw-2">&</span>delta_positions).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(delta_positions_data).unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>minibuf = [<span class="number">0u32</span>; <span class="number">1</span>]; |
| <span class="kw">for </span>(offset, <span class="kw-2">&</span>delta_position) <span class="kw">in </span>delta_positions.iter().enumerate() { |
| position_reader.read(offset <span class="kw">as </span>u64, <span class="kw-2">&mut </span>minibuf[..]); |
| <span class="macro">assert_eq!</span>(delta_position, minibuf[<span class="number">0</span>]); |
| } |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_read() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>position_deltas: Vec<u32> = (<span class="number">0</span>..<span class="number">1000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>position_deltas[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">1224</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>n <span class="kw">in </span><span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">10</span>, <span class="number">127</span>, <span class="number">128</span>, <span class="number">130</span>, <span class="number">312</span>] { |
| <span class="kw">let </span><span class="kw-2">mut </span>v = <span class="macro">vec!</span>[<span class="number">0u32</span>; n]; |
| position_reader.read(<span class="number">0</span>, <span class="kw-2">&mut </span>v[..]); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..n { |
| <span class="macro">assert_eq!</span>(position_deltas[i], i <span class="kw">as </span>u32); |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_empty_position() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>positions_buffer = <span class="macro">vec!</span>[]; |
| <span class="kw">let </span><span class="kw-2">mut </span>serializer = PositionSerializer::new(<span class="kw-2">&mut </span>positions_buffer); |
| serializer.close_term()<span class="question-mark">?</span>; |
| serializer.close()<span class="question-mark">?</span>; |
| <span class="kw">let </span>position_delta = OwnedBytes::new(positions_buffer); |
| <span class="macro">assert!</span>(PositionReader::open(position_delta).is_ok()); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_multiple_write_positions() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span><span class="kw-2">mut </span>positions_buffer = <span class="macro">vec!</span>[]; |
| <span class="kw">let </span><span class="kw-2">mut </span>serializer = PositionSerializer::new(<span class="kw-2">&mut </span>positions_buffer); |
| serializer.write_positions_delta(<span class="kw-2">&</span>[<span class="number">1u32</span>, <span class="number">12u32</span>]); |
| serializer.write_positions_delta(<span class="kw-2">&</span>[<span class="number">4u32</span>, <span class="number">17u32</span>]); |
| serializer.write_positions_delta(<span class="kw-2">&</span>[<span class="number">443u32</span>]); |
| serializer.close_term()<span class="question-mark">?</span>; |
| serializer.close()<span class="question-mark">?</span>; |
| <span class="kw">let </span>position_delta = OwnedBytes::new(positions_buffer); |
| <span class="kw">let </span><span class="kw-2">mut </span>output_delta_pos_buffer = <span class="macro">vec!</span>[<span class="number">0u32</span>; <span class="number">5</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(position_delta)<span class="question-mark">?</span>; |
| position_reader.read(<span class="number">0</span>, <span class="kw-2">&mut </span>output_delta_pos_buffer[..]); |
| <span class="macro">assert_eq!</span>( |
| <span class="kw-2">&</span>output_delta_pos_buffer[..], |
| <span class="kw-2">&</span>[<span class="number">1u32</span>, <span class="number">12u32</span>, <span class="number">4u32</span>, <span class="number">17u32</span>, <span class="number">443u32</span>] |
| ); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_read_with_offset() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>position_deltas: Vec<u32> = (<span class="number">0</span>..<span class="number">1000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>position_deltas[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">1224</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>offset <span class="kw">in </span><span class="kw-2">&</span>[<span class="number">1u64</span>, <span class="number">10u64</span>, <span class="number">127u64</span>, <span class="number">128u64</span>, <span class="number">130u64</span>, <span class="number">312u64</span>] { |
| <span class="kw">for </span><span class="kw-2">&</span>len <span class="kw">in </span><span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">10</span>, <span class="number">130</span>, <span class="number">500</span>] { |
| <span class="kw">let </span><span class="kw-2">mut </span>v = <span class="macro">vec!</span>[<span class="number">0u32</span>; len]; |
| position_reader.read(offset, <span class="kw-2">&mut </span>v[..]); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..len { |
| <span class="macro">assert_eq!</span>(v[i], i <span class="kw">as </span>u32 + offset <span class="kw">as </span>u32); |
| } |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_read_after_skip() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>position_deltas: Vec<u32> = (<span class="number">0</span>..<span class="number">1_000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>position_deltas[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">1224</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0u32</span>; <span class="number">7</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>c = <span class="number">0</span>; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>offset = <span class="number">0</span>; |
| <span class="kw">for _ in </span><span class="number">0</span>..<span class="number">100 </span>{ |
| position_reader.read(offset, <span class="kw-2">&mut </span>buf); |
| position_reader.read(offset, <span class="kw-2">&mut </span>buf); |
| offset += <span class="number">7</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>el <span class="kw">in </span><span class="kw-2">&</span>buf { |
| <span class="macro">assert_eq!</span>(c, el); |
| c += <span class="number">1</span>; |
| } |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_reread_anchor_different_than_block() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>positions_delta: Vec<u32> = (<span class="number">0</span>..<span class="number">2_000_000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>positions_delta[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">5003499</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0u32</span>; <span class="number">256</span>]; |
| position_reader.read(<span class="number">128</span>, <span class="kw-2">&mut </span>buf); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">256 </span>{ |
| <span class="macro">assert_eq!</span>(buf[i], (<span class="number">128 </span>+ i) <span class="kw">as </span>u32); |
| } |
| position_reader.read(<span class="number">128</span>, <span class="kw-2">&mut </span>buf); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">256 </span>{ |
| <span class="macro">assert_eq!</span>(buf[i], (<span class="number">128 </span>+ i) <span class="kw">as </span>u32); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_requesting_passed_block() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>positions_delta: Vec<u32> = (<span class="number">0</span>..<span class="number">512</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>positions_delta[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">533</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0u32</span>; <span class="number">1</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| position_reader.read(<span class="number">230</span>, <span class="kw-2">&mut </span>buf); |
| <span class="macro">assert_eq!</span>(buf[<span class="number">0</span>], <span class="number">230</span>); |
| position_reader.read(<span class="number">9</span>, <span class="kw-2">&mut </span>buf); |
| <span class="macro">assert_eq!</span>(buf[<span class="number">0</span>], <span class="number">9</span>); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">const </span>CONST_VAL: u32 = <span class="number">9u32</span>; |
| <span class="kw">let </span>positions_delta: Vec<u32> = iter::repeat(CONST_VAL).take(<span class="number">2_000_000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>positions_delta[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">1_015_627</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data)<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0u32</span>; <span class="number">1</span>]; |
| position_reader.read(<span class="number">0</span>, <span class="kw-2">&mut </span>buf); |
| <span class="macro">assert_eq!</span>(buf[<span class="number">0</span>], CONST_VAL); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_position_advance() -> <span class="kw">crate</span>::Result<()> { |
| <span class="kw">let </span>positions_delta: Vec<u32> = (<span class="number">0</span>..<span class="number">2_000_000</span>).collect(); |
| <span class="kw">let </span>positions_data = create_positions_data(<span class="kw-2">&</span>positions_delta[..])<span class="question-mark">?</span>; |
| <span class="macro">assert_eq!</span>(positions_data.len(), <span class="number">5_003_499</span>); |
| <span class="kw">for </span><span class="kw-2">&</span>offset <span class="kw">in </span><span class="kw-2">&</span>[ |
| <span class="number">10</span>, |
| <span class="number">128 </span>* <span class="number">1024</span>, |
| <span class="number">128 </span>* <span class="number">1024 </span>- <span class="number">1</span>, |
| <span class="number">128 </span>* <span class="number">1024 </span>+ <span class="number">7</span>, |
| <span class="number">128 </span>* <span class="number">10 </span>* <span class="number">1024 </span>+ <span class="number">10</span>, |
| ] { |
| <span class="kw">let </span><span class="kw-2">mut </span>position_reader = PositionReader::open(positions_data.clone())<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = [<span class="number">0u32</span>; <span class="number">1</span>]; |
| position_reader.read(offset, <span class="kw-2">&mut </span>buf); |
| <span class="macro">assert_eq!</span>(buf[<span class="number">0</span>], offset <span class="kw">as </span>u32); |
| } |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
