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<!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 of the Rust file `src/uu/paste/src/paste.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>paste.rs - 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="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script>
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</pre><pre class="rust"><code><span class="comment">// * This file is part of the uutils coreutils package.</span>
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<span class="comment">// *</span>
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<span class="comment">// * (c) Alex Lyon <arcterus@mail.com></span>
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<span class="comment">// *</span>
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<span class="comment">// * For the full copyright and license information, please view the LICENSE</span>
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<span class="comment">// * file that was distributed with this source code.</span>
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<span class="comment">// spell-checker:ignore (ToDO) delim</span>
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<span class="kw">use</span> <span class="ident">clap</span>::{<span class="ident">crate_version</span>, <span class="ident">App</span>, <span class="ident">AppSettings</span>, <span class="ident">Arg</span>};
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<span class="kw">use</span> <span class="ident">std::fs::File</span>;
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<span class="kw">use</span> <span class="ident">std::io</span>::{<span class="ident">stdin</span>, <span class="ident">stdout</span>, <span class="ident">BufRead</span>, <span class="ident">BufReader</span>, <span class="ident">Read</span>, <span class="ident">Write</span>};
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<span class="kw">use</span> <span class="ident">std::path::Path</span>;
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<span class="kw">use</span> <span class="ident">uucore::error</span>::{<span class="ident">FromIo</span>, <span class="ident">UResult</span>};
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<span class="kw">static</span> <span class="ident">ABOUT</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"Write lines consisting of the sequentially corresponding lines from each
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FILE, separated by TABs, to standard output."</span>;
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<span class="kw">mod</span> <span class="ident">options</span> {
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<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">DELIMITER</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"delimiters"</span>;
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<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">SERIAL</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"serial"</span>;
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<span class="kw">pub</span> <span class="kw">const</span> <span class="ident">FILE</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"file"</span>;
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}
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<span class="comment">// Wraps BufReader and stdin</span>
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<span class="kw">fn</span> <span class="ident">read_line</span><span class="op"><</span><span class="ident">R</span>: <span class="ident">Read</span><span class="op">></span>(
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<span class="ident">reader</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&mut</span> <span class="ident">BufReader</span><span class="op"><</span><span class="ident">R</span><span class="op">></span><span class="op">></span>,
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<span class="ident">buf</span>: <span class="kw-2">&mut</span> <span class="ident">String</span>,
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) -> <span class="ident">std::io::Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
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<span class="kw">match</span> <span class="ident">reader</span> {
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<span class="prelude-val">Some</span>(<span class="ident">reader</span>) => <span class="ident">reader</span>.<span class="ident">read_line</span>(<span class="ident">buf</span>),
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<span class="prelude-val">None</span> => <span class="ident">stdin</span>().<span class="ident">read_line</span>(<span class="ident">buf</span>),
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}
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}
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<span class="attribute">#[<span class="ident">uucore::main</span>]</span>
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">uumain</span>(<span class="ident">args</span>: <span class="kw">impl</span> <span class="ident">uucore::Args</span>) -> <span class="ident">UResult</span><span class="op"><</span>()<span class="op">></span> {
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<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">args</span>);
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<span class="kw">let</span> <span class="ident">serial</span> <span class="op">=</span> <span class="ident">matches</span>.<span class="ident">is_present</span>(<span class="ident">options::SERIAL</span>);
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<span class="kw">let</span> <span class="ident">delimiters</span> <span class="op">=</span> <span class="ident">matches</span>.<span class="ident">value_of</span>(<span class="ident">options::DELIMITER</span>).<span class="ident">unwrap</span>();
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<span class="kw">let</span> <span class="ident">files</span> <span class="op">=</span> <span class="ident">matches</span>
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.<span class="ident">values_of</span>(<span class="ident">options::FILE</span>)
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.<span class="ident">unwrap</span>()
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.<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">to_owned</span>())
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.<span class="ident">collect</span>();
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<span class="ident">paste</span>(<span class="ident">files</span>, <span class="ident">serial</span>, <span class="ident">delimiters</span>)
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}
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">uu_app</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span>() -> <span class="ident">App</span><span class="op"><</span><span class="lifetime">'a</span><span class="op">></span> {
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<span class="ident">App::new</span>(<span class="ident">uucore::util_name</span>())
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.<span class="ident">version</span>(<span class="macro">crate_version!</span>())
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.<span class="ident">about</span>(<span class="ident">ABOUT</span>)
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.<span class="ident">setting</span>(<span class="ident">AppSettings::InferLongArgs</span>)
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.<span class="ident">arg</span>(
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<span class="ident">Arg::new</span>(<span class="ident">options::SERIAL</span>)
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.<span class="ident">long</span>(<span class="ident">options::SERIAL</span>)
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.<span class="ident">short</span>(<span class="string">'s'</span>)
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.<span class="ident">help</span>(<span class="string">"paste one file at a time instead of in parallel"</span>),
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)
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.<span class="ident">arg</span>(
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<span class="ident">Arg::new</span>(<span class="ident">options::DELIMITER</span>)
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.<span class="ident">long</span>(<span class="ident">options::DELIMITER</span>)
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.<span class="ident">short</span>(<span class="string">'d'</span>)
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.<span class="ident">help</span>(<span class="string">"reuse characters from LIST instead of TABs"</span>)
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.<span class="ident">value_name</span>(<span class="string">"LIST"</span>)
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.<span class="ident">default_value</span>(<span class="string">"\t"</span>)
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.<span class="ident">hide_default_value</span>(<span class="bool-val">true</span>),
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)
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.<span class="ident">arg</span>(
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<span class="ident">Arg::new</span>(<span class="ident">options::FILE</span>)
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.<span class="ident">value_name</span>(<span class="string">"FILE"</span>)
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.<span class="ident">multiple_occurrences</span>(<span class="bool-val">true</span>)
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.<span class="ident">default_value</span>(<span class="string">"-"</span>),
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)
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}
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<span class="kw">fn</span> <span class="ident">paste</span>(<span class="ident">filenames</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, <span class="ident">serial</span>: <span class="ident">bool</span>, <span class="ident">delimiters</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">UResult</span><span class="op"><</span>()<span class="op">></span> {
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">files</span> <span class="op">=</span> <span class="ident">Vec::with_capacity</span>(<span class="ident">filenames</span>.<span class="ident">len</span>());
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<span class="kw">for</span> <span class="ident">name</span> <span class="kw">in</span> <span class="ident">filenames</span> {
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||
<span class="kw">let</span> <span class="ident">file</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">name</span> <span class="op">==</span> <span class="string">"-"</span> {
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||
<span class="prelude-val">None</span>
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||
} <span class="kw">else</span> {
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||
<span class="kw">let</span> <span class="ident">path</span> <span class="op">=</span> <span class="ident">Path::new</span>(<span class="kw-2">&</span><span class="ident">name</span>);
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||
<span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">File::open</span>(<span class="ident">path</span>).<span class="ident">map_err_context</span>(<span class="ident">String::new</span>)<span class="question-mark">?</span>;
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||
<span class="prelude-val">Some</span>(<span class="ident">BufReader::new</span>(<span class="ident">r</span>))
|
||
};
|
||
<span class="ident">files</span>.<span class="ident">push</span>(<span class="ident">file</span>);
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||
}
|
||
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||
<span class="kw">let</span> <span class="ident">delimiters</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">char</span><span class="op">></span> <span class="op">=</span> <span class="ident">unescape</span>(<span class="ident">delimiters</span>).<span class="ident">chars</span>().<span class="ident">collect</span>();
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||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">delim_count</span> <span class="op">=</span> <span class="number">0</span>;
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||
<span class="kw">let</span> <span class="ident">stdout</span> <span class="op">=</span> <span class="ident">stdout</span>();
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">stdout</span> <span class="op">=</span> <span class="ident">stdout</span>.<span class="ident">lock</span>();
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">output</span> <span class="op">=</span> <span class="ident">String::new</span>();
|
||
<span class="kw">if</span> <span class="ident">serial</span> {
|
||
<span class="kw">for</span> <span class="ident">file</span> <span class="kw">in</span> <span class="kw-2">&mut</span> <span class="ident">files</span> {
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||
<span class="ident">output</span>.<span class="ident">clear</span>();
|
||
<span class="kw">loop</span> {
|
||
<span class="kw">match</span> <span class="ident">read_line</span>(<span class="ident">file</span>.<span class="ident">as_mut</span>(), <span class="kw-2">&mut</span> <span class="ident">output</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="number">0</span>) => <span class="kw">break</span>,
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) => {
|
||
<span class="kw">if</span> <span class="ident">output</span>.<span class="ident">ends_with</span>(<span class="string">'\n'</span>) {
|
||
<span class="ident">output</span>.<span class="ident">pop</span>();
|
||
}
|
||
<span class="ident">output</span>.<span class="ident">push</span>(<span class="ident">delimiters</span>[<span class="ident">delim_count</span> <span class="op">%</span> <span class="ident">delimiters</span>.<span class="ident">len</span>()]);
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}
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||
<span class="prelude-val">Err</span>(<span class="ident">e</span>) => <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>.<span class="ident">map_err_context</span>(<span class="ident">String::new</span>)),
|
||
}
|
||
<span class="ident">delim_count</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
|
||
}
|
||
<span class="ident">output</span>.<span class="ident">pop</span>();
|
||
<span class="macro">writeln!</span>(<span class="ident">stdout</span>, <span class="string">"{}"</span>, <span class="ident">output</span>)<span class="question-mark">?</span>;
|
||
}
|
||
} <span class="kw">else</span> {
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">eof</span> <span class="op">=</span> <span class="macro">vec!</span>[<span class="bool-val">false</span>; <span class="ident">files</span>.<span class="ident">len</span>()];
|
||
<span class="kw">loop</span> {
|
||
<span class="ident">output</span>.<span class="ident">clear</span>();
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">eof_count</span> <span class="op">=</span> <span class="number">0</span>;
|
||
<span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">file</span>) <span class="kw">in</span> <span class="ident">files</span>.<span class="ident">iter_mut</span>().<span class="ident">enumerate</span>() {
|
||
<span class="kw">if</span> <span class="ident">eof</span>[<span class="ident">i</span>] {
|
||
<span class="ident">eof_count</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
|
||
} <span class="kw">else</span> {
|
||
<span class="kw">match</span> <span class="ident">read_line</span>(<span class="ident">file</span>.<span class="ident">as_mut</span>(), <span class="kw-2">&mut</span> <span class="ident">output</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="number">0</span>) => {
|
||
<span class="ident">eof</span>[<span class="ident">i</span>] <span class="op">=</span> <span class="bool-val">true</span>;
|
||
<span class="ident">eof_count</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
|
||
}
|
||
<span class="prelude-val">Ok</span>(<span class="kw">_</span>) => {
|
||
<span class="kw">if</span> <span class="ident">output</span>.<span class="ident">ends_with</span>(<span class="string">'\n'</span>) {
|
||
<span class="ident">output</span>.<span class="ident">pop</span>();
|
||
}
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="ident">e</span>) => <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>.<span class="ident">map_err_context</span>(<span class="ident">String::new</span>)),
|
||
}
|
||
}
|
||
<span class="ident">output</span>.<span class="ident">push</span>(<span class="ident">delimiters</span>[<span class="ident">delim_count</span> <span class="op">%</span> <span class="ident">delimiters</span>.<span class="ident">len</span>()]);
|
||
<span class="ident">delim_count</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
|
||
}
|
||
<span class="kw">if</span> <span class="ident">files</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="ident">eof_count</span> {
|
||
<span class="kw">break</span>;
|
||
}
|
||
<span class="comment">// Remove final delimiter</span>
|
||
<span class="ident">output</span>.<span class="ident">pop</span>();
|
||
<span class="macro">writeln!</span>(<span class="ident">stdout</span>, <span class="string">"{}"</span>, <span class="ident">output</span>)<span class="question-mark">?</span>;
|
||
<span class="ident">delim_count</span> <span class="op">=</span> <span class="number">0</span>;
|
||
}
|
||
}
|
||
<span class="prelude-val">Ok</span>(())
|
||
}
|
||
|
||
<span class="comment">// Unescape all special characters</span>
|
||
<span class="comment">// TODO: this will need work to conform to GNU implementation</span>
|
||
<span class="kw">fn</span> <span class="ident">unescape</span>(<span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) -> <span class="ident">String</span> {
|
||
<span class="ident">s</span>.<span class="ident">replace</span>(<span class="string">"\\n"</span>, <span class="string">"\n"</span>)
|
||
.<span class="ident">replace</span>(<span class="string">"\\t"</span>, <span class="string">"\t"</span>)
|
||
.<span class="ident">replace</span>(<span class="string">"\\\\"</span>, <span class="string">"\\"</span>)
|
||
.<span class="ident">replace</span>(<span class="string">'\\'</span>, <span class="string">""</span>)
|
||
}
|
||
</code></pre></div>
|
||
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