<!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 to the Rust file `abstutil/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs.html -- 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="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">&#9776;</div><a href='../../abstutil/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1">  1</span>
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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">mod</span> <span class="ident">cli</span>;
<span class="kw">mod</span> <span class="ident">collections</span>;
<span class="kw">mod</span> <span class="ident">io</span>;
<span class="kw">mod</span> <span class="ident">random</span>;
<span class="kw">mod</span> <span class="ident">time</span>;

<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">cli</span>::<span class="ident">CmdArgs</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">collections</span>::{
    <span class="ident">contains_duplicates</span>, <span class="ident">retain_btreemap</span>, <span class="ident">retain_btreeset</span>, <span class="ident">wraparound_get</span>, <span class="ident">Counter</span>, <span class="ident">MultiMap</span>, <span class="ident">Tags</span>,
    <span class="ident">VecMap</span>,
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">io</span>::{
    <span class="ident">basename</span>, <span class="ident">delete_file</span>, <span class="ident">deserialize_btreemap</span>, <span class="ident">deserialize_multimap</span>, <span class="ident">deserialize_usize</span>,
    <span class="ident">file_exists</span>, <span class="ident">find_next_file</span>, <span class="ident">find_prev_file</span>, <span class="ident">from_json</span>, <span class="ident">list_all_objects</span>, <span class="ident">list_dir</span>,
    <span class="ident">load_all_objects</span>, <span class="ident">maybe_read_binary</span>, <span class="ident">maybe_read_json</span>, <span class="ident">read_binary</span>, <span class="ident">read_json</span>, <span class="ident">read_object</span>,
    <span class="ident">serialize_btreemap</span>, <span class="ident">serialize_multimap</span>, <span class="ident">serialize_usize</span>, <span class="ident">serialized_size_bytes</span>, <span class="ident">slurp_file</span>,
    <span class="ident">to_json</span>, <span class="ident">write_binary</span>, <span class="ident">write_json</span>, <span class="ident">FileWithProgress</span>,
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">random</span>::{<span class="ident">fork_rng</span>, <span class="ident">WeightedUsizeChoice</span>};
<span class="kw">pub</span> <span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">time</span>::{
    <span class="ident">elapsed_seconds</span>, <span class="ident">prettyprint_usize</span>, <span class="ident">start_profiler</span>, <span class="ident">stop_profiler</span>, <span class="ident">Parallelism</span>, <span class="ident">Profiler</span>,
    <span class="ident">Timer</span>, <span class="ident">TimerSink</span>,
};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">BTreeSet</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Write</span>;

<span class="kw">const</span> <span class="ident">PROGRESS_FREQUENCY_SECONDS</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="number">0.2</span>;

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clamp</span>(<span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">min</span>: <span class="ident">f64</span>, <span class="ident">max</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">f64</span> {
    <span class="kw">if</span> <span class="ident">x</span> <span class="op">&lt;</span> <span class="ident">min</span> {
        <span class="ident">min</span>
    } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">x</span> <span class="op">&gt;</span> <span class="ident">max</span> {
        <span class="ident">max</span>
    } <span class="kw">else</span> {
        <span class="ident">x</span>
    }
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">plain_list_names</span>(<span class="ident">names</span>: <span class="ident">BTreeSet</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</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</span>::<span class="ident">new</span>();
    <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">names</span>.<span class="ident">len</span>();
    <span class="kw">for</span> (<span class="ident">idx</span>, <span class="ident">n</span>) <span class="kw">in</span> <span class="ident">names</span>.<span class="ident">into_iter</span>().<span class="ident">enumerate</span>() {
        <span class="kw">if</span> <span class="ident">idx</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> {
            <span class="kw">if</span> <span class="ident">idx</span> <span class="op">=</span><span class="op">=</span> <span class="ident">len</span> <span class="op">-</span> <span class="number">1</span> {
                <span class="kw">if</span> <span class="ident">len</span> <span class="op">=</span><span class="op">=</span> <span class="number">2</span> {
                    <span class="macro">write</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="string">&quot; and &quot;</span>).<span class="ident">unwrap</span>();
                } <span class="kw">else</span> {
                    <span class="macro">write</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="string">&quot;, and &quot;</span>).<span class="ident">unwrap</span>();
                }
            } <span class="kw">else</span> {
                <span class="macro">write</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="string">&quot;, &quot;</span>).<span class="ident">unwrap</span>();
            }
        }
        <span class="macro">write</span><span class="macro">!</span>(<span class="ident">s</span>, <span class="string">&quot;{}&quot;</span>, <span class="ident">n</span>).<span class="ident">unwrap</span>();
    }
    <span class="ident">s</span>
}

<span class="ident">lazy_static</span>::<span class="macro">lazy_static</span><span class="macro">!</span> {
    <span class="kw">static</span> <span class="kw-2">ref</span> <span class="ident">ROOT_DIR</span>: <span class="ident">String</span> <span class="op">=</span> {
        <span class="comment">// If you&#39;re packaging for a release and need the data directory to be in some fixed</span>
        <span class="comment">// location: ABST_DATA_DIR=/some/path cargo build ...</span>
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">dir</span>) <span class="op">=</span> <span class="macro">option_env</span><span class="macro">!</span>(<span class="string">&quot;ABST_DATA_DIR&quot;</span>) {
            <span class="ident">dir</span>.<span class="ident">trim_end_matches</span>(<span class="string">&#39;/&#39;</span>).<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;wasm32&quot;</span>) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> {
            <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t find the data/ directory&quot;</span>);
        }
    };

    <span class="kw">static</span> <span class="kw-2">ref</span> <span class="ident">ROOT_PLAYER_DIR</span>: <span class="ident">String</span> <span class="op">=</span> {
        <span class="comment">// If you&#39;re packaging for a release and want the player&#39;s local data directory to be</span>
        <span class="comment">// $HOME/.abstreet, set ABST_PLAYER_HOME_DIR=1</span>
        <span class="kw">if</span> <span class="macro">option_env</span><span class="macro">!</span>(<span class="string">&quot;ABST_PLAYER_HOME_DIR&quot;</span>).<span class="ident">is_some</span>() {
            <span class="kw">match</span> <span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">var</span>(<span class="string">&quot;HOME&quot;</span>) {
                <span class="prelude-val">Ok</span>(<span class="ident">dir</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/.abstreet&quot;</span>, <span class="ident">dir</span>.<span class="ident">trim_end_matches</span>(<span class="string">&#39;/&#39;</span>)),
                <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;This build of A/B Street stores player data in $HOME/.abstreet, but $HOME isn&#39;t set: {}&quot;</span>, <span class="ident">err</span>),
            }
        } <span class="kw">else</span> <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;wasm32&quot;</span>) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> {
            <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t find the data/ directory&quot;</span>);
        }
    };
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path</span><span class="op">&lt;</span><span class="ident">I</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="ident">p</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">p</span>.<span class="ident">into</span>();
    <span class="kw">if</span> <span class="ident">p</span>.<span class="ident">starts_with</span>(<span class="string">&quot;player/&quot;</span>) {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/{}&quot;</span>, <span class="kw-2">*</span><span class="ident">ROOT_PLAYER_DIR</span>, <span class="ident">p</span>)
    } <span class="kw">else</span> {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/{}&quot;</span>, <span class="kw-2">*</span><span class="ident">ROOT_DIR</span>, <span class="ident">p</span>)
    }
}

<span class="comment">// System data (Players can&#39;t edit, needed at runtime)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_map</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;system/maps/{}.bin&quot;</span>, <span class="ident">map_name</span>))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_maps</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="string">&quot;system/maps&quot;</span>)
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_prebaked_results</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">scenario_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/prebaked_results/{}/{}.bin&quot;</span>,
        <span class="ident">map_name</span>, <span class="ident">scenario_name</span>
    ))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_scenario</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">scenario_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="comment">// TODO Getting complicated. Sometimes we&#39;re trying to load, so we should look for .bin, then</span>
    <span class="comment">// .json. But when we&#39;re writing a custom scenario, we actually want to write a .bin.</span>
    <span class="kw">let</span> <span class="ident">bin</span> <span class="op">=</span> <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/scenarios/{}/{}.bin&quot;</span>,
        <span class="ident">map_name</span>, <span class="ident">scenario_name</span>
    ));
    <span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/scenarios/{}/{}.json&quot;</span>,
        <span class="ident">map_name</span>, <span class="ident">scenario_name</span>
    ));
    <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="kw-2">&amp;</span><span class="ident">bin</span>) {
        <span class="kw">return</span> <span class="ident">bin</span>;
    }
    <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="kw-2">&amp;</span><span class="ident">json</span>) {
        <span class="kw">return</span> <span class="ident">json</span>;
    }
    <span class="ident">bin</span>
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_scenarios</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;system/scenarios/{}&quot;</span>, <span class="ident">map_name</span>))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_synthetic_map</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;system/synthetic_maps/{}.json&quot;</span>, <span class="ident">map_name</span>))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_synthetic_maps</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="string">&quot;system/synthetic_maps&quot;</span>)
}

<span class="comment">// Player data (Players edit this)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_camera_state</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;player/camera_state/{}.json&quot;</span>, <span class="ident">map_name</span>))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_edits</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;player/edits/{}/{}.json&quot;</span>, <span class="ident">map_name</span>, <span class="ident">edits_name</span>))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_edits</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;player/edits/{}&quot;</span>, <span class="ident">map_name</span>))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_save</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">run_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">time</span>: <span class="ident">String</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/saves/{}/{}_{}/{}.bin&quot;</span>,
        <span class="ident">map_name</span>, <span class="ident">edits_name</span>, <span class="ident">run_name</span>, <span class="ident">time</span>
    ))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_saves</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">run_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/saves/{}/{}_{}&quot;</span>,
        <span class="ident">map_name</span>, <span class="ident">edits_name</span>, <span class="ident">run_name</span>
    ))
}

<span class="comment">// Input data (For developers to build maps, not needed at runtime)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_popdat</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="string">&quot;input/seattle/popdat.bin&quot;</span>)
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_raw_map</span>(<span class="ident">map_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;input/raw_maps/{}.bin&quot;</span>, <span class="ident">map_name</span>))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_raw_maps</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="string">&quot;input/raw_maps&quot;</span>)
}
</pre></div>
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