<!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 `geom/src/duration.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>duration.rs - source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate 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id="406">406</span> <span id="407">407</span> <span id="408">408</span> <span id="409">409</span> <span id="410">410</span> <span id="411">411</span> <span id="412">412</span> <span id="413">413</span> <span id="414">414</span> <span id="415">415</span> <span id="416">416</span> <span id="417">417</span> <span id="418">418</span> <span id="419">419</span> <span id="420">420</span> <span id="421">421</span> <span id="422">422</span> <span id="423">423</span> <span id="424">424</span> <span id="425">425</span> <span id="426">426</span> <span id="427">427</span> <span id="428">428</span> <span id="429">429</span> <span id="430">430</span> <span id="431">431</span> <span id="432">432</span> <span id="433">433</span> <span id="434">434</span> </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">cmp</span>, <span class="ident">ops</span>}; <span class="kw">use</span> <span class="ident">anyhow::Result</span>; <span class="kw">use</span> <span class="ident">instant::Instant</span>; <span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>}; <span class="kw">use</span> <span class="ident">abstutil::elapsed_seconds</span>; <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">deserialize_f64</span>, <span class="ident">serialize_f64</span>, <span class="ident">trim_f64</span>, <span class="ident">Distance</span>, <span class="ident">Speed</span>, <span class="ident">UnitFmt</span>}; <span class="doccomment">/// A duration, in seconds. Can be negative.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Duration</span>( <span class="attribute">#[<span class="ident">serde</span>(<span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">"serialize_f64"</span>, <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">"deserialize_f64"</span>)]</span> <span class="ident">f64</span>, ); <span class="comment">// By construction, Duration is a finite f64 with trimmed precision.</span> <span class="kw">impl</span> <span class="ident">Eq</span> <span class="kw">for</span> <span class="ident">Duration</span> {} <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy::derive_ord_xor_partial_ord</span>)]</span> <span class="comment">// false positive</span> <span class="kw">impl</span> <span class="ident">Ord</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">cmp::Ordering</span> { <span class="self">self</span>.<span class="ident">partial_cmp</span>(<span class="ident">other</span>).<span class="ident">unwrap</span>() } } <span class="kw">impl</span> <span class="ident">Duration</span> { <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ZERO</span>: <span class="ident">Duration</span> <span class="op">=</span> <span class="ident">Duration::const_seconds</span>(<span class="number">0.0</span>); <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">EPSILON</span>: <span class="ident">Duration</span> <span class="op">=</span> <span class="ident">Duration::const_seconds</span>(<span class="number">0.0001</span>); <span class="doccomment">/// Creates a duration in seconds.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">seconds</span>(<span class="ident">value</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="kw">if</span> <span class="op">!</span><span class="ident">value</span>.<span class="ident">is_finite</span>() { <span class="macro">panic!</span>(<span class="string">"Bad Duration {}"</span>, <span class="ident">value</span>); } <span class="ident">Duration</span>(<span class="ident">trim_f64</span>(<span class="ident">value</span>)) } <span class="doccomment">/// Creates a duration in minutes.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">minutes</span>(<span class="ident">mins</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>((<span class="ident">mins</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="number">60.0</span>) } <span class="doccomment">/// Creates a duration in hours.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">hours</span>(<span class="ident">hours</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>((<span class="ident">hours</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="number">3600.0</span>) } <span class="doccomment">/// Creates a duration in minutes.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">f64_minutes</span>(<span class="ident">mins</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="ident">mins</span> <span class="op">*</span> <span class="number">60.0</span>) } <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">const_seconds</span>(<span class="ident">value</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration</span>(<span class="ident">value</span>) } <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">to_u64</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">u64</span> { (<span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">Duration::EPSILON</span>.<span class="number">0</span>) <span class="kw">as</span> <span class="ident">u64</span> } <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">from_u64</span>(<span class="ident">x</span>: <span class="ident">u64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { (<span class="ident">x</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">Duration::EPSILON</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">abs</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> { <span class="self">Self</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">abs</span>()) } <span class="doccomment">/// Returns the duration in seconds. Prefer working in typesafe `Duration`s.</span> <span class="comment">// TODO Remove if possible.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">inner_seconds</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">f64</span> { <span class="self">self</span>.<span class="number">0</span> } <span class="doccomment">/// Splits the duration into (hours, minutes, seconds, deciseconds).</span> <span class="comment">// TODO Could share some of this with Time -- the representations are the same</span> <span class="kw">fn</span> <span class="ident">get_parts</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> (<span class="ident">usize</span>, <span class="ident">usize</span>, <span class="ident">usize</span>, <span class="ident">usize</span>) { <span class="comment">// Force positive</span> <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">remainder</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">inner_seconds</span>().<span class="ident">abs</span>(); <span class="kw">let</span> <span class="ident">hours</span> <span class="op">=</span> (<span class="ident">remainder</span> <span class="op">/</span> <span class="number">3600.0</span>).<span class="ident">floor</span>(); <span class="ident">remainder</span> <span class="op">-</span><span class="op">=</span> <span class="ident">hours</span> <span class="op">*</span> <span class="number">3600.0</span>; <span class="kw">let</span> <span class="ident">minutes</span> <span class="op">=</span> (<span class="ident">remainder</span> <span class="op">/</span> <span class="number">60.0</span>).<span class="ident">floor</span>(); <span class="ident">remainder</span> <span class="op">-</span><span class="op">=</span> <span class="ident">minutes</span> <span class="op">*</span> <span class="number">60.0</span>; <span class="kw">let</span> <span class="ident">seconds</span> <span class="op">=</span> <span class="ident">remainder</span>.<span class="ident">floor</span>(); <span class="ident">remainder</span> <span class="op">-</span><span class="op">=</span> <span class="ident">seconds</span>; <span class="kw">let</span> <span class="ident">decis</span> <span class="op">=</span> (<span class="ident">remainder</span> <span class="op">/</span> <span class="number">0.1</span>).<span class="ident">round</span>(); ( <span class="ident">hours</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">minutes</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">seconds</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">decis</span> <span class="kw">as</span> <span class="ident">usize</span>, ) } <span class="doccomment">/// Parses a duration such as "3:00" to `Duration::minutes(3)`.</span> <span class="comment">// TODO This is NOT the inverse of Display!</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">string</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">parts</span>: <span class="ident">Vec</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">string</span>.<span class="ident">split</span>(<span class="string">':'</span>).<span class="ident">collect</span>(); <span class="kw">if</span> <span class="ident">parts</span>.<span class="ident">is_empty</span>() { <span class="macro">bail!</span>(<span class="string">"Duration {}: no :'s"</span>, <span class="ident">string</span>); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">seconds</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="number">0.0</span>; <span class="kw">if</span> <span class="ident">parts</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">contains</span>(<span class="string">'.'</span>) { <span class="kw">let</span> <span class="ident">last_parts</span>: <span class="ident">Vec</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span> <span class="op">=</span> <span class="ident">parts</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">split</span>(<span class="string">'.'</span>).<span class="ident">collect</span>(); <span class="kw">if</span> <span class="ident">last_parts</span>.<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="number">2</span> { <span class="macro">bail!</span>(<span class="string">"Duration {}: no . in last part"</span>, <span class="ident">string</span>); } <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="ident">last_parts</span>[<span class="number">1</span>].<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span> <span class="op">/</span> <span class="number">10.0</span>; <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="ident">last_parts</span>[<span class="number">0</span>].<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span>; } <span class="kw">else</span> { <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="ident">parts</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span>; } <span class="kw">match</span> <span class="ident">parts</span>.<span class="ident">len</span>() { <span class="number">1</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="ident">Duration::seconds</span>(<span class="ident">seconds</span>)), <span class="number">2</span> <span class="op">=</span><span class="op">></span> { <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="number">60.0</span> <span class="op">*</span> <span class="ident">parts</span>[<span class="number">0</span>].<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span>; <span class="prelude-val">Ok</span>(<span class="ident">Duration::seconds</span>(<span class="ident">seconds</span>)) } <span class="number">3</span> <span class="op">=</span><span class="op">></span> { <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="number">60.0</span> <span class="op">*</span> <span class="ident">parts</span>[<span class="number">1</span>].<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span>; <span class="ident">seconds</span> <span class="op">+</span><span class="op">=</span> <span class="number">3600.0</span> <span class="op">*</span> <span class="ident">parts</span>[<span class="number">0</span>].<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>()<span class="question-mark">?</span>; <span class="prelude-val">Ok</span>(<span class="ident">Duration::seconds</span>(<span class="ident">seconds</span>)) } <span class="kw">_</span> <span class="op">=</span><span class="op">></span> <span class="macro">bail!</span>(<span class="string">"Duration {}: weird number of parts"</span>, <span class="ident">string</span>), } } <span class="doccomment">/// If two durations are within this amount, they'll print as if they're the same.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">epsilon_eq</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { <span class="kw">let</span> <span class="ident">eps</span> <span class="op">=</span> <span class="ident">Duration::seconds</span>(<span class="number">0.1</span>); <span class="kw">match</span> <span class="self">self</span>.<span class="ident">cmp</span>(<span class="kw-2">&</span><span class="ident">other</span>) { <span class="ident">cmp::Ordering::Greater</span> <span class="op">=</span><span class="op">></span> <span class="self">self</span> <span class="op">-</span> <span class="ident">other</span> <span class="op"><</span> <span class="ident">eps</span>, <span class="ident">cmp::Ordering::Less</span> <span class="op">=</span><span class="op">></span> <span class="ident">other</span> <span class="op">-</span> <span class="self">self</span> <span class="op"><</span> <span class="ident">eps</span>, <span class="ident">cmp::Ordering::Equal</span> <span class="op">=</span><span class="op">></span> <span class="bool-val">true</span>, } } <span class="doccomment">/// Returns the duration elapsed from this moment in real time.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">realtime_elapsed</span>(<span class="ident">since</span>: <span class="ident">Instant</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="ident">elapsed_seconds</span>(<span class="ident">since</span>)) } <span class="doccomment">/// Rounds a duration up to the nearest whole number multiple.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">round_up</span>(<span class="self">self</span>, <span class="ident">multiple</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="kw">let</span> <span class="ident">remainder</span> <span class="op">=</span> <span class="self">self</span> <span class="op">%</span> <span class="ident">multiple</span>; <span class="kw">if</span> <span class="ident">remainder</span> <span class="op">=</span><span class="op">=</span> <span class="ident">Duration::ZERO</span> { <span class="self">self</span> } <span class="kw">else</span> { <span class="self">self</span> <span class="op">+</span> <span class="ident">multiple</span> <span class="op">-</span> <span class="ident">remainder</span> } } <span class="doccomment">/// Returns the duration as a number of minutes, rounded up.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">num_minutes_rounded_up</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> { <span class="kw">let</span> (<span class="ident">hrs</span>, <span class="ident">mins</span>, <span class="ident">secs</span>, <span class="ident">rem</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_parts</span>(); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">mins</span> <span class="op">+</span> <span class="number">60</span> <span class="op">*</span> <span class="ident">hrs</span>; <span class="kw">if</span> <span class="ident">secs</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> <span class="op">|</span><span class="op">|</span> <span class="ident">rem</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">result</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>; } <span class="ident">result</span> } <span class="comment">// TODO Do something fancier? http://vis.stanford.edu/papers/tick-labels</span> <span class="comment">// TODO Unit test me</span> <span class="doccomment">/// Returns (rounded max, the boundaries)</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">make_intervals_for_max</span>(<span class="self">self</span>, <span class="ident">num_labels</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> (<span class="ident">Duration</span>, <span class="ident">Vec</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span>) { <span class="comment">// Example 1: 43 minutes, max 5 labels... raw_mins_per_interval is 8.6</span> <span class="kw">let</span> <span class="ident">raw_mins_per_interval</span> <span class="op">=</span> (<span class="self">self</span>.<span class="ident">num_minutes_rounded_up</span>() <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">num_labels</span> <span class="kw">as</span> <span class="ident">f64</span>); <span class="comment">// So then this rounded up to 10 minutes</span> <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">mins_per_interval</span> <span class="op">=</span> <span class="ident">Duration::seconds</span>(<span class="number">60.0</span> <span class="op">*</span> <span class="ident">raw_mins_per_interval</span>) .<span class="ident">round_up</span>(<span class="ident">Duration::minutes</span>(<span class="number">5</span>)) .<span class="ident">num_minutes_rounded_up</span>(); <span class="comment">// Example 2: 8 minutes, max 5 labels... raw_mins_per_interval is 1.6</span> <span class="comment">// If we're under 25 minutes, this is going to be weird.</span> <span class="kw">if</span> <span class="self">self</span> <span class="op"><</span> (<span class="ident">num_labels</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">Duration::minutes</span>(<span class="number">5</span>) { <span class="comment">// rounded up to 5 mins? 1 min increments</span> <span class="comment">// up to 10? 2 min increments</span> <span class="comment">// up to 15? 3</span> <span class="comment">// up to 20? 4</span> <span class="comment">// then after that the normal behavior</span> <span class="ident">mins_per_interval</span> <span class="op">=</span> (<span class="self">self</span>.<span class="ident">round_up</span>(<span class="ident">Duration::minutes</span>(<span class="number">5</span>)) <span class="op">/</span> (<span class="ident">num_labels</span> <span class="kw">as</span> <span class="ident">f64</span>)) .<span class="ident">num_minutes_rounded_up</span>(); } <span class="kw">let</span> <span class="ident">max</span> <span class="op">=</span> (<span class="ident">num_labels</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">Duration::minutes</span>(<span class="ident">mins_per_interval</span>); <span class="kw">let</span> <span class="ident">labels</span> <span class="op">=</span> (<span class="number">0</span>..<span class="op">=</span><span class="ident">num_labels</span>) .<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> <span class="ident">Duration::minutes</span>(<span class="ident">i</span> <span class="op">*</span> <span class="ident">mins_per_interval</span>)) .<span class="ident">collect</span>(); <span class="kw">if</span> <span class="ident">max</span> <span class="op"><</span> <span class="self">self</span> { <span class="macro">panic!</span>( <span class="string">"Wait max of {} with {} labels wound up with rounded max of {}"</span>, <span class="self">self</span>, <span class="ident">num_labels</span>, <span class="ident">max</span> ); } (<span class="ident">max</span>, <span class="ident">labels</span>) } <span class="doccomment">/// Shows only the largest unit (hours, minute, seconds), rounded to `precision` decimal points.</span> <span class="doccomment">///</span> <span class="doccomment">/// ```</span> <span class="doccomment">/// use geom::Duration;</span> <span class="doccomment">/// assert_eq!(Duration::seconds(3600.0).to_rounded_string(0), "1hr");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(3600.0).to_rounded_string(1), "1.0hr");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(7800.0).to_rounded_string(0), "2hr");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(800.0).to_rounded_string(1), "13.3min");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(-800.0).to_rounded_string(1), "-13.3min");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(0.0).to_rounded_string(0), "0");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(12.5).to_rounded_string(1), "12.5s");</span> <span class="doccomment">/// assert_eq!(Duration::seconds(12.5).to_rounded_string(2), "12.50s");</span> <span class="doccomment">/// ```</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_rounded_string</span>(<span class="self">self</span>, <span class="ident">precision</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="ident">String</span> { <span class="kw">let</span> (<span class="ident">hours</span>, <span class="ident">minutes</span>, <span class="ident">seconds</span>, <span class="ident">remainder</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_parts</span>(); <span class="kw">if</span> <span class="ident">hours</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">minutes</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">seconds</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">remainder</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> { <span class="kw">return</span> <span class="string">"0"</span>.<span class="ident">to_string</span>(); } <span class="kw">let</span> <span class="ident">sign</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span> <span class="op"><</span> <span class="ident">Duration::ZERO</span> { <span class="string">"-"</span> } <span class="kw">else</span> { <span class="string">""</span> }; <span class="kw">let</span> (<span class="ident">whole</span>, <span class="ident">part</span>, <span class="ident">unit</span>) <span class="op">=</span> { <span class="kw">if</span> <span class="ident">hours</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="kw">let</span> <span class="ident">whole</span> <span class="op">=</span> <span class="ident">hours</span> <span class="kw">as</span> <span class="ident">f64</span>; <span class="kw">let</span> <span class="ident">part</span> <span class="op">=</span> <span class="ident">minutes</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">/</span> <span class="number">60.0</span>; <span class="kw">let</span> <span class="ident">unit</span> <span class="op">=</span> <span class="string">"hr"</span>; (<span class="ident">whole</span>, <span class="ident">part</span>, <span class="ident">unit</span>) } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">minutes</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="kw">let</span> <span class="ident">whole</span> <span class="op">=</span> <span class="ident">minutes</span> <span class="kw">as</span> <span class="ident">f64</span>; <span class="kw">let</span> <span class="ident">part</span> <span class="op">=</span> <span class="ident">seconds</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">/</span> <span class="number">60.0</span>; <span class="kw">let</span> <span class="ident">unit</span> <span class="op">=</span> <span class="string">"min"</span>; (<span class="ident">whole</span>, <span class="ident">part</span>, <span class="ident">unit</span>) } <span class="kw">else</span> { <span class="kw">let</span> <span class="ident">whole</span> <span class="op">=</span> <span class="ident">seconds</span> <span class="kw">as</span> <span class="ident">f64</span>; <span class="kw">let</span> <span class="ident">part</span> <span class="op">=</span> <span class="ident">remainder</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">/</span> <span class="number">10.0</span>; <span class="kw">let</span> <span class="ident">unit</span> <span class="op">=</span> <span class="string">"s"</span>; (<span class="ident">whole</span>, <span class="ident">part</span>, <span class="ident">unit</span>) } }; <span class="kw">let</span> <span class="ident">number</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{:.1$}"</span>, <span class="ident">whole</span> <span class="op">+</span> <span class="ident">part</span>, <span class="ident">precision</span>); <span class="kw">return</span> <span class="macro">format!</span>(<span class="string">"{}{}{}"</span>, <span class="ident">sign</span>, <span class="ident">number</span>, <span class="ident">unit</span>); } <span class="doccomment">/// Describes the duration according to formatting rules.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_string</span>(<span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&</span><span class="ident">UnitFmt</span>) <span class="op">-</span><span class="op">></span> <span class="ident">String</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">String::new</span>(); <span class="kw">if</span> <span class="self">self</span> <span class="op"><</span> <span class="ident">Duration::ZERO</span> { <span class="ident">s</span> <span class="op">=</span> <span class="string">"-"</span>.<span class="ident">to_string</span>(); } <span class="kw">let</span> (<span class="ident">hours</span>, <span class="ident">minutes</span>, <span class="ident">seconds</span>, <span class="ident">remainder</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_parts</span>(); <span class="kw">if</span> <span class="ident">hours</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">minutes</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">seconds</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> <span class="op">&&</span> <span class="ident">remainder</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> { <span class="kw">return</span> <span class="string">"0s"</span>.<span class="ident">to_string</span>(); } <span class="kw">if</span> <span class="ident">hours</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">s</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{}{}hr "</span>, <span class="ident">s</span>, <span class="ident">hours</span>); } <span class="kw">if</span> <span class="ident">minutes</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">s</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{}{}min "</span>, <span class="ident">s</span>, <span class="ident">minutes</span>); } <span class="kw">if</span> <span class="ident">remainder</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="kw">if</span> <span class="ident">fmt</span>.<span class="ident">round_durations</span> { <span class="ident">s</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{}{}s"</span>, <span class="ident">s</span>, <span class="ident">seconds</span>); } <span class="kw">else</span> { <span class="ident">s</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{}{}.{:1}s"</span>, <span class="ident">s</span>, <span class="ident">seconds</span>, <span class="ident">remainder</span>); } } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">seconds</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">s</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{}{}s"</span>, <span class="ident">s</span>, <span class="ident">seconds</span>); } <span class="comment">// Trim trailing whitespace, in case we have non-zero hours/minutes, but zero seconds</span> <span class="ident">s</span>.<span class="ident">trim_end</span>().<span class="ident">to_string</span>() } } <span class="kw">impl</span> <span class="ident">std::fmt::Display</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">std::fmt::Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="ident">std::fmt::Result</span> { <span class="macro">write!</span>( <span class="ident">f</span>, <span class="string">"{}"</span>, (<span class="kw-2">*</span><span class="self">self</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">UnitFmt</span> { <span class="ident">metric</span>: <span class="bool-val">false</span>, <span class="ident">round_durations</span>: <span class="bool-val">false</span> }) ) } } <span class="kw">impl</span> <span class="ident">ops::Add</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">add</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">+</span> <span class="ident">other</span>.<span class="number">0</span>) } } <span class="kw">impl</span> <span class="ident">ops::AddAssign</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">add_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">+</span> <span class="ident">other</span>; } } <span class="kw">impl</span> <span class="ident">ops::SubAssign</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">sub_assign</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) { <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">-</span> <span class="ident">other</span>; } } <span class="kw">impl</span> <span class="ident">ops::Sub</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">sub</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">-</span> <span class="ident">other</span>.<span class="number">0</span>) } } <span class="kw">impl</span> <span class="ident">ops::Neg</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">neg</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="op">-</span><span class="self">self</span>.<span class="number">0</span>) } } <span class="kw">impl</span> <span class="ident">ops::Mul</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">*</span> <span class="ident">other</span>) } } <span class="comment">// TODO Both of these work. Use a macro or crate to define both, so we don't have to worry about</span> <span class="comment">// order for commutative things like multiplication. :P</span> <span class="kw">impl</span> <span class="ident">ops::Mul</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> <span class="kw">for</span> <span class="ident">f64</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="self">self</span> <span class="op">*</span> <span class="ident">other</span>.<span class="number">0</span>) } } <span class="kw">impl</span> <span class="ident">ops::Mul</span><span class="op"><</span><span class="ident">Speed</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>; <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Speed</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Distance</span> { <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">*</span> <span class="ident">other</span>.<span class="ident">inner_meters_per_second</span>()) } } <span class="kw">impl</span> <span class="ident">ops::Div</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">f64</span>; <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">f64</span> { <span class="kw">if</span> <span class="ident">other</span>.<span class="number">0</span> <span class="op">=</span><span class="op">=</span> <span class="number">0.0</span> { <span class="macro">panic!</span>(<span class="string">"Can't divide {} / {}"</span>, <span class="self">self</span>, <span class="ident">other</span>); } <span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">other</span>.<span class="number">0</span> } } <span class="kw">impl</span> <span class="ident">ops::Div</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="kw">if</span> <span class="ident">other</span> <span class="op">=</span><span class="op">=</span> <span class="number">0.0</span> { <span class="macro">panic!</span>(<span class="string">"Can't divide {} / {}"</span>, <span class="self">self</span>, <span class="ident">other</span>); } <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">other</span>) } } <span class="kw">impl</span> <span class="ident">ops::Rem</span><span class="op"><</span><span class="ident">Duration</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>; <span class="kw">fn</span> <span class="ident">rem</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Duration</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">%</span> <span class="ident">other</span>.<span class="number">0</span>) } } <span class="kw">impl</span> <span class="ident">std::iter::Sum</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">sum</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> <span class="kw">where</span> <span class="ident">I</span>: <span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Duration</span><span class="op">></span>, { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sum</span> <span class="op">=</span> <span class="ident">Duration::ZERO</span>; <span class="kw">for</span> <span class="ident">x</span> <span class="kw">in</span> <span class="ident">iter</span> { <span class="ident">sum</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>; } <span class="ident">sum</span> } } <span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Duration</span> { <span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-</span><span class="op">></span> <span class="ident">Duration</span> { <span class="ident">Duration::ZERO</span> } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> <span class="kw">mod</span> <span class="ident">tests</span> { <span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>; <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">print_durations</span>() { <span class="kw">let</span> <span class="ident">dont_round</span> <span class="op">=</span> <span class="ident">UnitFmt</span> { <span class="ident">metric</span>: <span class="bool-val">false</span>, <span class="ident">round_durations</span>: <span class="bool-val">false</span>, }; <span class="kw">let</span> <span class="ident">round</span> <span class="op">=</span> <span class="ident">UnitFmt</span> { <span class="ident">metric</span>: <span class="bool-val">false</span>, <span class="ident">round_durations</span>: <span class="bool-val">true</span>, }; <span class="macro">assert_eq!</span>(<span class="string">"0s"</span>, <span class="ident">Duration::ZERO</span>.<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>)); <span class="macro">assert_eq!</span>(<span class="string">"0s"</span>, <span class="ident">Duration::seconds</span>(<span class="number">0.001</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>)); <span class="macro">assert_eq!</span>( <span class="string">"1min 30.1s"</span>, <span class="ident">Duration::seconds</span>(<span class="number">90.123</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>) ); <span class="macro">assert_eq!</span>(<span class="string">"1min 30s"</span>, <span class="ident">Duration::seconds</span>(<span class="number">90.123</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">round</span>)); <span class="macro">assert_eq!</span>( <span class="string">"2hr 33min 5s"</span>, (<span class="ident">Duration::hours</span>(<span class="number">2</span>) <span class="op">+</span> <span class="ident">Duration::minutes</span>(<span class="number">33</span>) <span class="op">+</span> <span class="ident">Duration::seconds</span>(<span class="number">5.0</span>)) .<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>) ); <span class="macro">assert_eq!</span>(<span class="string">"3hr"</span>, <span class="ident">Duration::hours</span>(<span class="number">3</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>)); <span class="macro">assert_eq!</span>(<span class="string">"42min"</span>, <span class="ident">Duration::minutes</span>(<span class="number">42</span>).<span class="ident">to_string</span>(<span class="kw-2">&</span><span class="ident">dont_round</span>)); } } </code></pre></div> </section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="geom" data-search-index-js="../../search-index.js" data-search-js="../../search.js"></div> <script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script> </body></html>