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<a href="#51" id="51">51</a></pre></div><pre class="rust"><code><span class="kw">use </span>std::io::{ErrorKind, Write};
<span class="kw">use </span>std::process::{Command, Stdio};
<span class="doccomment">/// Disassemble the code currently added to the runtime, using
/// [`ndisasm`](https://nasm.us/index.php) and print it to _stdout_. If
/// `ndisasm` is not available on the system this prints a warning and
/// becomes a nop.
///
/// # Panics
///
/// Panics if anything goes wrong with spawning, writing to or reading from
/// the `ndisasm` child process.
</span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>disasm<T: AsRef<[u8]>>(code: T) {
<span class="kw">let </span>code = code.as_ref();
<span class="comment">// Create ndisasm process, which expects input on stdin.
</span><span class="kw">let </span><span class="kw-2">mut </span>child = <span class="kw">match </span>Command::new(<span class="string">"ndisasm"</span>)
.args([<span class="string">"-b64"</span>, <span class="string">"-"</span>])
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.spawn()
{
<span class="prelude-val">Ok</span>(child) => child,
<span class="prelude-val">Err</span>(err) <span class="kw">if </span>err.kind() == ErrorKind::NotFound => {
<span class="macro">println!</span>(<span class="string">"disasm: skipping, ndisasm not found"</span>);
<span class="kw">return</span>;
}
<span class="prelude-val">Err</span>(err) => {
<span class="macro">panic!</span>(<span class="string">"{:?}"</span>, err);
}
};
<span class="comment">// Write code to stdin of ndisasm.
</span>child
.stdin
.take()
.expect(<span class="string">"failed to take stdin"</span>)
.write_all(code)
.expect(<span class="string">"failed to write bytes to stdin"</span>);
<span class="comment">// Wait for output from ndisasm and print to stdout.
</span><span class="macro">println!</span>(
<span class="string">"{}"</span>,
String::from_utf8_lossy(
<span class="kw-2">&</span>child
.wait_with_output()
.expect(<span class="string">"failed to get stdout"</span>)
.stdout
)
);
}
</code></pre></div></section></main></body></html>
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