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<h1 class="tutorial-brand">// HTOPRS — A FAITHFUL RUST PORT OF HTOP</h1>
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<p class="docs-build-line">faithful port · htop 3.5.1 is the spec · C source at ~/forkedRepos/htop · function-for-function, cited File.c:line · build-time port-purity gate</p>
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<h2 class="tutorial-title"><span class="step-hash">>_</span>HTOPRS</h2>
<p class="tutorial-subtitle"><strong>The htop C source is the spec.</strong> htoprs is a faithful Rust port of <a href="https://github.com/htop-dev/htop" target="_blank" rel="noopener noreferrer">htop</a>, the interactive process viewer. The upstream C is translated <strong>function-for-function</strong>, never reimplemented from scratch. Every function under <code>src/ported/</code> ports a specific htop C function and cites its origin (<code><File>.c:<line></code>) in its doc comment.</p>
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<h2>Porting methodology</h2>
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<tr><td>Spec</td><td>htop <strong>3.5.1</strong> at <code>~/forkedRepos/htop</code> (131 <code>.c</code> files, platform-split darwin / linux / freebsd / …)</td></tr>
<tr><td>Port tree</td><td><code>src/ported/<file>.rs</code> — one Rust module per C file; each <code>fn</code> cites <code>/// Port of</code> its <code><File>.c:<line></code> origin</td></tr>
<tr><td>Port-purity gate</td><td><code>build.rs</code> checks every free <code>fn</code> name under <code>src/ported/</code> against the htop C-function snapshot; a name with no C counterpart fails the build. Cannot be bypassed by <code>cargo test --test X</code></td></tr>
<tr><td>C-name snapshot</td><td><code>tests/data/htop_c_fn_names.txt</code>, regenerated by <code>tests/data/extract_c_fn_names.sh</code> after pulling upstream htop</td></tr>
<tr><td>Allowlist</td><td><code>tests/data/fake_fn_allowlist.txt</code> — genuine Rust-only architectural helpers only, each justified</td></tr>
<tr><td>Port report</td><td><code>scripts/gen_port_report.py</code> → <a href="port_report.html">port_report.html</a>, per-file + overall coverage derived from source at run time</td></tr>
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<h2>Ported so far — <code>891 / 1093</code> C functions (81.5%)</h2>
<p>121 of htop's 131 C files are started; 31 stubs remain. The authoritative per-file, per-function breakdown is the <a href="port_report.html">port report</a>, generated from source. By subsystem:</p>
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<tr><td>Core model</td><td><code>Process</code> / <code>ProcessTable</code> / <code>Table</code> / <code>Row</code> / <code>Machine</code> / <code>Object</code> / <code>Settings</code></td></tr>
<tr><td>Containers & utils</td><td><code>Vector</code>, <code>Hashtable</code>, <code>RichString</code>, <code>XUtils</code></td></tr>
<tr><td>Meters</td><td><code>Meter</code> + CPU / Memory / Swap / Load / Battery / Network / DiskIO / GPU / ZFS / dynamic</td></tr>
<tr><td>UI panels</td><td><code>Panel</code> / <code>ScreenManager</code> / <code>MainPanel</code> / <code>FunctionBar</code> / <code>Header</code> + setup panels</td></tr>
<tr><td>Screens & input</td><td><code>Action</code>, <code>IncSet</code>, <code>LineEditor</code>, trace / env / open-files / process-locks screens</td></tr>
<tr><td>ncurses shim</td><td><code>CRT</code> — crossterm-backed colors, mouse, key decode</td></tr>
<tr><td>Platforms</td><td>darwin / linux / freebsd / netbsd / openbsd / dragonflybsd / solaris</td></tr>
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<h2>htoprs-original extensions</h2>
<p>On top of the faithful port, an <code>src/extensions/</code> layer (18 modules, exempt from the port-purity gate) adds capabilities htop lacks — htoprs-original, not translations of htop C.</p>
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<tr><td>Theming</td><td>31 named color schemes, live chooser / editor overlay (<code>c</code> / <code>C</code>), 256-color UI recolor, persisted to prefs</td></tr>
<tr><td>Monitoring</td><td>Per-PID history rings, threshold alerts (<code>A</code>), fuzzy finder (<code>f</code>), regex filters (<code>r</code>), snapshot diffs (<code>d</code>), JSON/CSV export (<code>o</code>)</td></tr>
<tr><td>Braille graphs</td><td>Full CPU history graph (<code>G</code>) and an inline per-process CPU graph whose height scales with load (<code>v</code>)</td></tr>
<tr><td>Chrome</td><td>Themed help overlay (<code>h</code>/<code>?</code>), border toggle (<code>B</code>), bar-fill-glyph cycler (<code>b</code>)</td></tr>
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<h2>Build & test</h2>
<pre>cargo build # runs the port-purity gate
cargo test # hand-crafted unit tests pin the C edge behavior
python3 scripts/gen_port_report.py # regenerate docs/port_report.html</pre>
<p>The snapshot is regenerated with <code>HTOP_C_SOURCE=~/forkedRepos/htop tests/data/extract_c_fn_names.sh</code> after pulling new upstream htop commits.</p>
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<h2>The MenkeTechnologies stack</h2>
<p>htoprs follows the same faithful-port precedent as <a href="https://github.com/MenkeTechnologies/zshrs" target="_blank" rel="noopener noreferrer">zshrs</a> (the first compiled Unix shell, a 1:1 port of zsh's C). Browse the rest via the <a href="https://github.com/MenkeTechnologies/MenkeTechnologiesMeta" target="_blank" rel="noopener noreferrer">MenkeTechnologiesMeta</a> umbrella repo.</p>
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