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sylvestre
2021-10-13 02:32:05 +00:00
parent fd3598e2fa
commit 9bf5e67ad1
8 changed files with 140 additions and 80 deletions
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settings.html
+2 -2
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src/uu_head/head.rs.html
+13 -43
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@@ -590,21 +590,6 @@
<span id="590">590</span>
<span id="591">591</span>
<span id="592">592</span>
<span id="593">593</span>
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</pre><pre class="rust">
<span class="comment">// * This file is part of the uutils coreutils package.</span>
<span class="comment">// *</span>
@@ -716,6 +701,12 @@
<span class="ident">Bytes</span>(<span class="ident">usize</span>),
}
<span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Modes</span> {
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
<span class="ident">Modes::Lines</span>(<span class="number">10</span>)
}
}
<span class="kw">fn</span> <span class="ident">parse_mode</span><span class="op">&lt;</span><span class="ident">F</span><span class="op">&gt;</span>(<span class="ident">src</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">closure</span>: <span class="ident">F</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(<span class="ident">Modes</span>, <span class="ident">bool</span>), <span class="ident">String</span><span class="op">&gt;</span>
<span class="kw">where</span>
<span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Modes</span>,
@@ -752,7 +743,7 @@
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>)]</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Default</span>)]</span>
<span class="kw">struct</span> <span class="ident">HeadOptions</span> {
<span class="kw">pub</span> <span class="ident">quiet</span>: <span class="ident">bool</span>,
<span class="kw">pub</span> <span class="ident">verbose</span>: <span class="ident">bool</span>,
@@ -763,22 +754,11 @@
}
<span class="kw">impl</span> <span class="ident">HeadOptions</span> {
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">HeadOptions</span> {
<span class="ident">HeadOptions</span> {
<span class="ident">quiet</span>: <span class="bool-val">false</span>,
<span class="ident">verbose</span>: <span class="bool-val">false</span>,
<span class="ident">zeroed</span>: <span class="bool-val">false</span>,
<span class="ident">all_but_last</span>: <span class="bool-val">false</span>,
<span class="ident">mode</span>: <span class="ident">Modes::Lines</span>(<span class="number">10</span>),
<span class="ident">files</span>: <span class="ident">Vec::new</span>(),
}
}
<span class="doccomment">///Construct options from matches</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_from</span>(<span class="ident">args</span>: <span class="kw">impl</span> <span class="ident">uucore::Args</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="self">Self</span>, <span class="ident">String</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="ident">uu_app</span>().<span class="ident">get_matches_from</span>(<span class="ident">arg_iterate</span>(<span class="ident">args</span>)<span class="question-mark">?</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">options</span> <span class="op">=</span> <span class="ident">HeadOptions::new</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">options</span>: <span class="ident">HeadOptions</span> <span class="op">=</span> <span class="ident">Default::default</span>();
<span class="ident">options</span>.<span class="ident">quiet</span> <span class="op">=</span> <span class="ident">matches</span>.<span class="ident">is_present</span>(<span class="ident">options::QUIET_NAME</span>);
<span class="ident">options</span>.<span class="ident">verbose</span> <span class="op">=</span> <span class="ident">matches</span>.<span class="ident">is_present</span>(<span class="ident">options::VERBOSE_NAME</span>);
@@ -805,12 +785,6 @@
<span class="prelude-val">Ok</span>(<span class="ident">options</span>)
}
}
<span class="comment">// to make clippy shut up</span>
<span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">HeadOptions</span> {
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
<span class="self">Self</span><span class="ident">::new</span>()
}
}
<span class="kw">fn</span> <span class="ident">read_n_bytes</span><span class="op">&lt;</span><span class="ident">R</span><span class="op">&gt;</span>(<span class="ident">input</span>: <span class="ident">R</span>, <span class="ident">n</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">std::io::Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span>
<span class="kw">where</span>
@@ -1131,17 +1105,13 @@
<span class="macro">assert!</span>(<span class="ident">options</span>(<span class="string">&quot;-c IsThisJustFantasy&quot;</span>).<span class="ident">is_err</span>());
}
<span class="attribute">#[<span class="ident">test</span>]</span>
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy::bool_comparison</span>)]</span>
<span class="kw">fn</span> <span class="ident">test_options_correct_defaults</span>() {
<span class="kw">let</span> <span class="ident">opts</span> <span class="op">=</span> <span class="ident">HeadOptions::new</span>();
<span class="kw">let</span> <span class="ident">opts2</span>: <span class="ident">HeadOptions</span> <span class="op">=</span> <span class="ident">Default::default</span>();
<span class="kw">let</span> <span class="ident">opts</span>: <span class="ident">HeadOptions</span> <span class="op">=</span> <span class="ident">Default::default</span>();
<span class="macro">assert_eq!</span>(<span class="ident">opts</span>, <span class="ident">opts2</span>);
<span class="macro">assert!</span>(<span class="ident">opts</span>.<span class="ident">verbose</span> <span class="op">=</span><span class="op">=</span> <span class="bool-val">false</span>);
<span class="macro">assert!</span>(<span class="ident">opts</span>.<span class="ident">quiet</span> <span class="op">=</span><span class="op">=</span> <span class="bool-val">false</span>);
<span class="macro">assert!</span>(<span class="ident">opts</span>.<span class="ident">zeroed</span> <span class="op">=</span><span class="op">=</span> <span class="bool-val">false</span>);
<span class="macro">assert!</span>(<span class="ident">opts</span>.<span class="ident">all_but_last</span> <span class="op">=</span><span class="op">=</span> <span class="bool-val">false</span>);
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">opts</span>.<span class="ident">verbose</span>);
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">opts</span>.<span class="ident">quiet</span>);
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">opts</span>.<span class="ident">zeroed</span>);
<span class="macro">assert!</span>(<span class="op">!</span><span class="ident">opts</span>.<span class="ident">all_but_last</span>);
<span class="macro">assert_eq!</span>(<span class="ident">opts</span>.<span class="ident">mode</span>, <span class="ident">Modes::Lines</span>(<span class="number">10</span>));
<span class="macro">assert!</span>(<span class="ident">opts</span>.<span class="ident">files</span>.<span class="ident">is_empty</span>());
}
src/uu_tac/tac.rs.html
+120 -30
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@@ -254,6 +254,51 @@
<span id="254">254</span>
<span id="255">255</span>
<span id="256">256</span>
<span id="257">257</span>
<span id="258">258</span>
<span id="259">259</span>
<span id="260">260</span>
<span id="261">261</span>
<span id="262">262</span>
<span id="263">263</span>
<span id="264">264</span>
<span id="265">265</span>
<span id="266">266</span>
<span id="267">267</span>
<span id="268">268</span>
<span id="269">269</span>
<span id="270">270</span>
<span id="271">271</span>
<span id="272">272</span>
<span id="273">273</span>
<span id="274">274</span>
<span id="275">275</span>
<span id="276">276</span>
<span id="277">277</span>
<span id="278">278</span>
<span id="279">279</span>
<span id="280">280</span>
<span id="281">281</span>
<span id="282">282</span>
<span id="283">283</span>
<span id="284">284</span>
<span id="285">285</span>
<span id="286">286</span>
<span id="287">287</span>
<span id="288">288</span>
<span id="289">289</span>
<span id="290">290</span>
<span id="291">291</span>
<span id="292">292</span>
<span id="293">293</span>
<span id="294">294</span>
<span id="295">295</span>
<span id="296">296</span>
<span id="297">297</span>
<span id="298">298</span>
<span id="299">299</span>
<span id="300">300</span>
<span id="301">301</span>
</pre><pre class="rust">
<span class="comment">// * This file is part of the uutils coreutils package.</span>
<span class="comment">// *</span>
@@ -262,15 +307,19 @@
<span class="comment">// * For the full copyright and license information, please view the LICENSE</span>
<span class="comment">// * file that was distributed with this source code.</span>
<span class="comment">// spell-checker:ignore (ToDO) sbytes slen dlen memmem</span>
<span class="comment">// spell-checker:ignore (ToDO) sbytes slen dlen memmem memmap Mmap mmap SIGBUS</span>
<span class="attribute">#[<span class="ident">macro_use</span>]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">uucore</span>;
<span class="kw">use</span> <span class="ident">clap</span>::{<span class="ident">crate_version</span>, <span class="ident">App</span>, <span class="ident">Arg</span>};
<span class="kw">use</span> <span class="ident">memchr::memmem</span>;
<span class="kw">use</span> <span class="ident">std::io</span>::{<span class="ident">stdin</span>, <span class="ident">stdout</span>, <span class="ident">BufReader</span>, <span class="ident">Read</span>, <span class="ident">Write</span>};
<span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">fs::File</span>, <span class="ident">path::Path</span>};
<span class="kw">use</span> <span class="ident">memmap2::Mmap</span>;
<span class="kw">use</span> <span class="ident">std::io</span>::{<span class="ident">stdin</span>, <span class="ident">stdout</span>, <span class="ident">BufWriter</span>, <span class="ident">Read</span>, <span class="ident">Write</span>};
<span class="kw">use</span> <span class="ident">std</span>::{
<span class="ident">fs</span>::{<span class="ident">read</span>, <span class="ident">File</span>},
<span class="ident">path::Path</span>,
};
<span class="kw">use</span> <span class="ident">uucore::display::Quotable</span>;
<span class="kw">use</span> <span class="ident">uucore::InvalidEncodingHandling</span>;
@@ -301,9 +350,9 @@
<span class="ident">raw_separator</span>
};
<span class="kw">let</span> <span class="ident">files</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">matches</span>.<span class="ident">values_of</span>(<span class="ident">options::FILE</span>) {
<span class="prelude-val">Some</span>(<span class="ident">v</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">v</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="ident">v</span>.<span class="ident">to_owned</span>()).<span class="ident">collect</span>(),
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec!</span>[<span class="string">&quot;-&quot;</span>.<span class="ident">to_owned</span>()],
<span class="kw">let</span> <span class="ident">files</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span><span class="op">&gt;</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">matches</span>.<span class="ident">values_of</span>(<span class="ident">options::FILE</span>) {
<span class="prelude-val">Some</span>(<span class="ident">v</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">v</span>.<span class="ident">collect</span>(),
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">vec!</span>[<span class="string">&quot;-&quot;</span>],
};
<span class="ident">tac</span>(<span class="ident">files</span>, <span class="ident">before</span>, <span class="ident">regex</span>, <span class="ident">separator</span>)
@@ -359,10 +408,11 @@
<span class="doccomment">/// returns [`std::io::Error`].</span>
<span class="kw">fn</span> <span class="ident">buffer_tac_regex</span>(
<span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>],
<span class="ident">pattern</span>: <span class="ident">regex::bytes::Regex</span>,
<span class="ident">pattern</span>: <span class="kw-2">&amp;</span><span class="ident">regex::bytes::Regex</span>,
<span class="ident">before</span>: <span class="ident">bool</span>,
) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">std::io::Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">stdout</span>();
<span class="kw">let</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">stdout</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">BufWriter::new</span>(<span class="ident">out</span>.<span class="ident">lock</span>());
<span class="comment">// The index of the line separator for the current line.</span>
<span class="comment">//</span>
@@ -428,7 +478,8 @@
<span class="doccomment">/// `separator` appears at the beginning of each line, as in</span>
<span class="doccomment">/// `&quot;/abc/def&quot;`.</span>
<span class="kw">fn</span> <span class="ident">buffer_tac</span>(<span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>], <span class="ident">before</span>: <span class="ident">bool</span>, <span class="ident">separator</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">std::io::Result</span><span class="op">&lt;</span>()<span class="op">&gt;</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">stdout</span>();
<span class="kw">let</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">stdout</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">BufWriter::new</span>(<span class="ident">out</span>.<span class="ident">lock</span>());
<span class="comment">// The number of bytes in the line separator.</span>
<span class="kw">let</span> <span class="ident">slen</span> <span class="op">=</span> <span class="ident">separator</span>.<span class="ident">as_bytes</span>().<span class="ident">len</span>();
@@ -465,12 +516,33 @@
<span class="prelude-val">Ok</span>(())
}
<span class="kw">fn</span> <span class="ident">tac</span>(<span class="ident">filenames</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span>, <span class="ident">before</span>: <span class="ident">bool</span>, <span class="ident">regex</span>: <span class="ident">bool</span>, <span class="ident">separator</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">i32</span> {
<span class="kw">fn</span> <span class="ident">tac</span>(<span class="ident">filenames</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="ident">str</span><span class="op">&gt;</span>, <span class="ident">before</span>: <span class="ident">bool</span>, <span class="ident">regex</span>: <span class="ident">bool</span>, <span class="ident">separator</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">i32</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">exit_code</span> <span class="op">=</span> <span class="number">0</span>;
<span class="kw">for</span> <span class="ident">filename</span> <span class="kw">in</span> <span class="kw-2">&amp;</span><span class="ident">filenames</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">BufReader::new</span>(<span class="kw">if</span> <span class="ident">filename</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;-&quot;</span> {
<span class="ident">Box::new</span>(<span class="ident">stdin</span>()) <span class="kw">as</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">Read</span><span class="op">&gt;</span>
<span class="kw">let</span> <span class="ident">pattern</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">regex</span> {
<span class="prelude-val">Some</span>(<span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">regex::bytes::Regex::new</span>(<span class="ident">separator</span>)))
} <span class="kw">else</span> {
<span class="prelude-val">None</span>
};
<span class="kw">for</span> <span class="kw-2">&amp;</span><span class="ident">filename</span> <span class="kw">in</span> <span class="kw-2">&amp;</span><span class="ident">filenames</span> {
<span class="kw">let</span> <span class="ident">mmap</span>;
<span class="kw">let</span> <span class="ident">buf</span>;
<span class="kw">let</span> <span class="ident">data</span>: <span class="kw-2">&amp;</span>[<span class="ident">u8</span>] <span class="op">=</span> <span class="kw">if</span> <span class="ident">filename</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;-&quot;</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">mmap1</span>) <span class="op">=</span> <span class="ident">try_mmap_stdin</span>() {
<span class="ident">mmap</span> <span class="op">=</span> <span class="ident">mmap1</span>;
<span class="kw-2">&amp;</span><span class="ident">mmap</span>
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">buf1</span> <span class="op">=</span> <span class="ident">Vec::new</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span> <span class="ident">stdin</span>().<span class="ident">read_to_end</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">buf1</span>) {
<span class="macro">show_error!</span>(<span class="string">&quot;failed to read from stdin: {}&quot;</span>, <span class="ident">e</span>);
<span class="ident">exit_code</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">continue</span>;
}
<span class="ident">buf</span> <span class="op">=</span> <span class="ident">buf1</span>;
<span class="kw-2">&amp;</span><span class="ident">buf</span>
}
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">Path::new</span>(<span class="ident">filename</span>);
<span class="kw">if</span> <span class="ident">path</span>.<span class="ident">is_dir</span>() <span class="op">|</span><span class="op">|</span> <span class="ident">path</span>.<span class="ident">metadata</span>().<span class="ident">is_err</span>() {
@@ -485,32 +557,50 @@
<span class="ident">exit_code</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">continue</span>;
}
<span class="kw">match</span> <span class="ident">File::open</span>(<span class="ident">path</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">f</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Box::new</span>(<span class="ident">f</span>) <span class="kw">as</span> <span class="ident">Box</span><span class="op">&lt;</span><span class="kw">dyn</span> <span class="ident">Read</span><span class="op">&gt;</span>,
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span><span class="op">&gt;</span> {
<span class="macro">show_error!</span>(<span class="string">&quot;failed to open {} for reading: {}&quot;</span>, <span class="ident">filename</span>.<span class="ident">quote</span>(), <span class="ident">e</span>);
<span class="ident">exit_code</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">continue</span>;
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">mmap1</span>) <span class="op">=</span> <span class="ident">try_mmap_path</span>(<span class="ident">path</span>) {
<span class="ident">mmap</span> <span class="op">=</span> <span class="ident">mmap1</span>;
<span class="kw-2">&amp;</span><span class="ident">mmap</span>
} <span class="kw">else</span> {
<span class="kw">match</span> <span class="ident">read</span>(<span class="ident">path</span>) {
<span class="prelude-val">Ok</span>(<span class="ident">buf1</span>) <span class="op">=</span><span class="op">&gt;</span> {
<span class="ident">buf</span> <span class="op">=</span> <span class="ident">buf1</span>;
<span class="kw-2">&amp;</span><span class="ident">buf</span>
}
<span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span><span class="op">&gt;</span> {
<span class="macro">show_error!</span>(<span class="string">&quot;failed to read {}: {}&quot;</span>, <span class="ident">filename</span>.<span class="ident">quote</span>(), <span class="ident">e</span>);
<span class="ident">exit_code</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">continue</span>;
}
}
}
});
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">data</span> <span class="op">=</span> <span class="ident">Vec::new</span>();
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span> <span class="ident">file</span>.<span class="ident">read_to_end</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">data</span>) {
<span class="macro">show_error!</span>(<span class="string">&quot;failed to read {}: {}&quot;</span>, <span class="ident">filename</span>.<span class="ident">quote</span>(), <span class="ident">e</span>);
<span class="ident">exit_code</span> <span class="op">=</span> <span class="number">1</span>;
<span class="kw">continue</span>;
};
<span class="kw">if</span> <span class="ident">regex</span> {
<span class="kw">let</span> <span class="ident">pattern</span> <span class="op">=</span> <span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">regex::bytes::Regex::new</span>(<span class="ident">separator</span>));
<span class="ident">buffer_tac_regex</span>(<span class="kw-2">&amp;</span><span class="ident">data</span>, <span class="ident">pattern</span>, <span class="ident">before</span>)
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">pattern</span>) <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">pattern</span> {
<span class="ident">buffer_tac_regex</span>(<span class="ident">data</span>, <span class="ident">pattern</span>, <span class="ident">before</span>)
} <span class="kw">else</span> {
<span class="ident">buffer_tac</span>(<span class="kw-2">&amp;</span><span class="ident">data</span>, <span class="ident">before</span>, <span class="ident">separator</span>)
<span class="ident">buffer_tac</span>(<span class="ident">data</span>, <span class="ident">before</span>, <span class="ident">separator</span>)
}
.<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="ident">e</span><span class="op">|</span> <span class="macro">crash!</span>(<span class="number">1</span>, <span class="string">&quot;failed to write to stdout: {}&quot;</span>, <span class="ident">e</span>));
}
<span class="ident">exit_code</span>
}
<span class="kw">fn</span> <span class="ident">try_mmap_stdin</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Mmap</span><span class="op">&gt;</span> {
<span class="comment">// SAFETY: If the file is truncated while we map it, SIGBUS will be raised</span>
<span class="comment">// and our process will be terminated, thus preventing access of invalid memory.</span>
<span class="kw">unsafe</span> { <span class="ident">Mmap::map</span>(<span class="kw-2">&amp;</span><span class="ident">stdin</span>()).<span class="ident">ok</span>() }
}
<span class="kw">fn</span> <span class="ident">try_mmap_path</span>(<span class="ident">path</span>: <span class="kw-2">&amp;</span><span class="ident">Path</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Mmap</span><span class="op">&gt;</span> {
<span class="kw">let</span> <span class="ident">file</span> <span class="op">=</span> <span class="ident">File::open</span>(<span class="ident">path</span>).<span class="ident">ok</span>()<span class="question-mark">?</span>;
<span class="comment">// SAFETY: If the file is truncated while we map it, SIGBUS will be raised</span>
<span class="comment">// and our process will be terminated, thus preventing access of invalid memory.</span>
<span class="kw">let</span> <span class="ident">mmap</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="ident">Mmap::map</span>(<span class="kw-2">&amp;</span><span class="ident">file</span>).<span class="ident">ok</span>()<span class="question-mark">?</span> };
<span class="prelude-val">Some</span>(<span class="ident">mmap</span>)
}
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