34 lines
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1.9 KiB
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34 lines
No EOL
1.9 KiB
HTML
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<title>Udp.recv — Ludic</title>
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<meta name="description" content="Read the next waiting datagram.">
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<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-udp.html">Udp</a> <span>›</span> <span class="here">Udp.recv</span></div>
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<div class="item-head">
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Udp.recv</h1>
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</div>
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<code class="sig">Udp.recv(socket, bytes, cap) -> int</code>
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<div class="desc"><p>Copies the next waiting datagram, up to <code>cap</code> bytes, into <code>bytes</code> and returns its length, or <code>0</code> when nothing is waiting. It never blocks: call it in a loop each frame until it returns <code>0</code>. The sender is <a href="udp-from_ip.html"><code>Udp.from_ip</code></a> / <a href="udp-from_port.html"><code>from_port</code></a>.</p></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
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entry {
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let s = Udp.open(port: 0)
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let buf = Memory.bytes(64)
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print(Udp.recv(socket: s, bytes: buf, cap: 64))
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}
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}</pre></div>
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