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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/seq/src/seq.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>seq.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><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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</pre><pre class="rust">
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<span class="comment">// TODO: Make -w flag work with decimals</span>
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<span class="comment">// TODO: Support -f flag</span>
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<span class="comment">// spell-checker:ignore (ToDO) istr chiter argptr ilen</span>
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<span class="attribute">#[<span class="ident">macro_use</span>]</span>
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<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">uucore</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">num_bigint::BigInt</span>;
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<span class="kw">use</span> <span class="ident">num_traits::One</span>;
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<span class="kw">use</span> <span class="ident">num_traits::Zero</span>;
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<span class="kw">use</span> <span class="ident">num_traits</span>::{<span class="ident">Num</span>, <span class="ident">ToPrimitive</span>};
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<span class="kw">use</span> <span class="ident">std::cmp</span>;
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<span class="kw">use</span> <span class="ident">std::io</span>::{<span class="ident">stdout</span>, <span class="ident">Write</span>};
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<span class="kw">use</span> <span class="ident">std::str::FromStr</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">"Display numbers from FIRST to LAST, in steps of INCREMENT."</span>;
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<span class="kw">static</span> <span class="ident">OPT_SEPARATOR</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"separator"</span>;
|
||
<span class="kw">static</span> <span class="ident">OPT_TERMINATOR</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"terminator"</span>;
|
||
<span class="kw">static</span> <span class="ident">OPT_WIDTHS</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"widths"</span>;
|
||
|
||
<span class="kw">static</span> <span class="ident">ARG_NUMBERS</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="string">"numbers"</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">usage</span>() <span class="op">-</span><span class="op">></span> <span class="ident">String</span> {
|
||
<span class="macro">format!</span>(
|
||
<span class="string">"{0} [OPTION]... LAST
|
||
{0} [OPTION]... FIRST LAST
|
||
{0} [OPTION]... FIRST INCREMENT LAST"</span>,
|
||
<span class="ident">uucore::execution_phrase</span>()
|
||
)
|
||
}
|
||
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span>
|
||
<span class="kw">struct</span> <span class="ident">SeqOptions</span> {
|
||
<span class="ident">separator</span>: <span class="ident">String</span>,
|
||
<span class="ident">terminator</span>: <span class="ident">String</span>,
|
||
<span class="ident">widths</span>: <span class="ident">bool</span>,
|
||
}
|
||
|
||
<span class="kw">enum</span> <span class="ident">Number</span> {
|
||
<span class="doccomment">/// Negative zero, as if it were an integer.</span>
|
||
<span class="ident">MinusZero</span>,
|
||
<span class="ident">BigInt</span>(<span class="ident">BigInt</span>),
|
||
<span class="ident">F64</span>(<span class="ident">f64</span>),
|
||
}
|
||
|
||
<span class="kw">impl</span> <span class="ident">Number</span> {
|
||
<span class="kw">fn</span> <span class="ident">is_zero</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
|
||
<span class="kw">match</span> <span class="self">self</span> {
|
||
<span class="ident">Number::MinusZero</span> <span class="op">=</span><span class="op">></span> <span class="bool-val">true</span>,
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="ident">n</span>.<span class="ident">is_zero</span>(),
|
||
<span class="ident">Number::F64</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="ident">n</span>.<span class="ident">is_zero</span>(),
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">into_f64</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">f64</span> {
|
||
<span class="kw">match</span> <span class="self">self</span> {
|
||
<span class="ident">Number::MinusZero</span> <span class="op">=</span><span class="op">></span> <span class="op">-</span><span class="number">0.</span>,
|
||
<span class="comment">// BigInt::to_f64() can not return None.</span>
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="ident">n</span>.<span class="ident">to_f64</span>().<span class="ident">unwrap</span>(),
|
||
<span class="ident">Number::F64</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="ident">n</span>,
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Number of characters needed to print the integral part of the number.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// The number of characters includes one character to represent the</span>
|
||
<span class="doccomment">/// minus sign ("-") if this number is negative.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// # Examples</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// ```rust,ignore</span>
|
||
<span class="doccomment">/// use num_bigint::{BigInt, Sign};</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// assert_eq!(</span>
|
||
<span class="doccomment">/// Number::BigInt(BigInt::new(Sign::Plus, vec![123])).num_digits(),</span>
|
||
<span class="doccomment">/// 3</span>
|
||
<span class="doccomment">/// );</span>
|
||
<span class="doccomment">/// assert_eq!(</span>
|
||
<span class="doccomment">/// Number::BigInt(BigInt::new(Sign::Minus, vec![123])).num_digits(),</span>
|
||
<span class="doccomment">/// 4</span>
|
||
<span class="doccomment">/// );</span>
|
||
<span class="doccomment">/// assert_eq!(Number::F64(123.45).num_digits(), 3);</span>
|
||
<span class="doccomment">/// assert_eq!(Number::MinusZero.num_digits(), 2);</span>
|
||
<span class="doccomment">/// ```</span>
|
||
<span class="kw">fn</span> <span class="ident">num_digits</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">usize</span> {
|
||
<span class="kw">match</span> <span class="self">self</span> {
|
||
<span class="ident">Number::MinusZero</span> <span class="op">=</span><span class="op">></span> <span class="number">2</span>,
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> <span class="ident">n</span>.<span class="ident">to_string</span>().<span class="ident">len</span>(),
|
||
<span class="ident">Number::F64</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">n</span>.<span class="ident">to_string</span>();
|
||
<span class="ident">s</span>.<span class="ident">find</span>(<span class="string">'.'</span>).<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="op">|</span> <span class="ident">s</span>.<span class="ident">len</span>())
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="kw">impl</span> <span class="ident">FromStr</span> <span class="kw">for</span> <span class="ident">Number</span> {
|
||
<span class="kw">type</span> <span class="prelude-val">Err</span> <span class="op">=</span> <span class="ident">String</span>;
|
||
<span class="kw">fn</span> <span class="ident">from_str</span>(<span class="kw-2">mut</span> <span class="ident">s</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="self">Self</span><span class="ident">::Err</span><span class="op">></span> {
|
||
<span class="kw">if</span> <span class="ident">s</span>.<span class="ident">starts_with</span>(<span class="string">'+'</span>) {
|
||
<span class="ident">s</span> <span class="op">=</span> <span class="kw-2">&</span><span class="ident">s</span>[<span class="number">1</span>..];
|
||
}
|
||
|
||
<span class="kw">match</span> <span class="ident">s</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">BigInt</span><span class="op">></span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">n</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="comment">// If `s` is '-0', then `parse()` returns</span>
|
||
<span class="comment">// `BigInt::zero()`, but we need to return</span>
|
||
<span class="comment">// `Number::MinusZero` instead.</span>
|
||
<span class="kw">if</span> <span class="ident">n</span> <span class="op">=</span><span class="op">=</span> <span class="ident">BigInt::zero</span>() <span class="op">&&</span> <span class="ident">s</span>.<span class="ident">starts_with</span>(<span class="string">'-'</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Number::MinusZero</span>)
|
||
} <span class="kw">else</span> {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">Number::BigInt</span>(<span class="ident">n</span>))
|
||
}
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="kw">match</span> <span class="ident">s</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">f64</span><span class="op">></span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">value</span>) <span class="kw">if</span> <span class="ident">value</span>.<span class="ident">is_nan</span>() <span class="op">=</span><span class="op">></span> <span class="prelude-val">Err</span>(<span class="macro">format!</span>(
|
||
<span class="string">"invalid 'not-a-number' argument: '{}'\nTry '{} --help' for more information."</span>,
|
||
<span class="ident">s</span>,
|
||
<span class="ident">uucore::execution_phrase</span>(),
|
||
)),
|
||
<span class="prelude-val">Ok</span>(<span class="ident">value</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Ok</span>(<span class="ident">Number::F64</span>(<span class="ident">value</span>)),
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Err</span>(<span class="macro">format!</span>(
|
||
<span class="string">"invalid floating point argument: '{}'\nTry '{} --help' for more information."</span>,
|
||
<span class="ident">s</span>,
|
||
<span class="ident">uucore::execution_phrase</span>(),
|
||
)),
|
||
},
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// A range of integers.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// The elements are (first, increment, last).</span>
|
||
<span class="kw">type</span> <span class="ident">RangeInt</span> <span class="op">=</span> (<span class="ident">BigInt</span>, <span class="ident">BigInt</span>, <span class="ident">BigInt</span>);
|
||
|
||
<span class="doccomment">/// A range of f64.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// The elements are (first, increment, last).</span>
|
||
<span class="kw">type</span> <span class="ident">RangeF64</span> <span class="op">=</span> (<span class="ident">f64</span>, <span class="ident">f64</span>, <span class="ident">f64</span>);
|
||
|
||
<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="op">-</span><span class="op">></span> <span class="ident">i32</span> {
|
||
<span class="kw">let</span> <span class="ident">usage</span> <span class="op">=</span> <span class="ident">usage</span>();
|
||
<span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="ident">uu_app</span>().<span class="ident">usage</span>(<span class="kw-2">&</span><span class="ident">usage</span>[..]).<span class="ident">get_matches_from</span>(<span class="ident">args</span>);
|
||
|
||
<span class="kw">let</span> <span class="ident">numbers</span> <span class="op">=</span> <span class="ident">matches</span>.<span class="ident">values_of</span>(<span class="ident">ARG_NUMBERS</span>).<span class="ident">unwrap</span>().<span class="ident">collect</span>::<span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="op">></span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">options</span> <span class="op">=</span> <span class="ident">SeqOptions</span> {
|
||
<span class="ident">separator</span>: <span class="ident">matches</span>.<span class="ident">value_of</span>(<span class="ident">OPT_SEPARATOR</span>).<span class="ident">unwrap_or</span>(<span class="string">"\n"</span>).<span class="ident">to_string</span>(),
|
||
<span class="ident">terminator</span>: <span class="ident">matches</span>.<span class="ident">value_of</span>(<span class="ident">OPT_TERMINATOR</span>).<span class="ident">unwrap_or</span>(<span class="string">"\n"</span>).<span class="ident">to_string</span>(),
|
||
<span class="ident">widths</span>: <span class="ident">matches</span>.<span class="ident">is_present</span>(<span class="ident">OPT_WIDTHS</span>),
|
||
};
|
||
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">largest_dec</span> <span class="op">=</span> <span class="number">0</span>;
|
||
<span class="kw">let</span> <span class="ident">first</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">numbers</span>.<span class="ident">len</span>() <span class="op">></span> <span class="number">1</span> {
|
||
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> <span class="ident">numbers</span>[<span class="number">0</span>];
|
||
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">len</span>();
|
||
<span class="kw">let</span> <span class="ident">dec</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">find</span>(<span class="string">'.'</span>).<span class="ident">unwrap_or</span>(<span class="ident">len</span>);
|
||
<span class="ident">largest_dec</span> <span class="op">=</span> <span class="ident">len</span> <span class="op">-</span> <span class="ident">dec</span>;
|
||
<span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">slice</span>.<span class="ident">parse</span>())
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">BigInt::one</span>())
|
||
};
|
||
<span class="kw">let</span> <span class="ident">increment</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">numbers</span>.<span class="ident">len</span>() <span class="op">></span> <span class="number">2</span> {
|
||
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> <span class="ident">numbers</span>[<span class="number">1</span>];
|
||
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">len</span>();
|
||
<span class="kw">let</span> <span class="ident">dec</span> <span class="op">=</span> <span class="ident">slice</span>.<span class="ident">find</span>(<span class="string">'.'</span>).<span class="ident">unwrap_or</span>(<span class="ident">len</span>);
|
||
<span class="ident">largest_dec</span> <span class="op">=</span> <span class="ident">cmp::max</span>(<span class="ident">largest_dec</span>, <span class="ident">len</span> <span class="op">-</span> <span class="ident">dec</span>);
|
||
<span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">slice</span>.<span class="ident">parse</span>())
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">BigInt::one</span>())
|
||
};
|
||
<span class="kw">if</span> <span class="ident">increment</span>.<span class="ident">is_zero</span>() {
|
||
<span class="macro">show_error!</span>(
|
||
<span class="string">"invalid Zero increment value: '{}'\nTry '{} --help' for more information."</span>,
|
||
<span class="ident">numbers</span>[<span class="number">1</span>],
|
||
<span class="ident">uucore::execution_phrase</span>()
|
||
);
|
||
<span class="kw">return</span> <span class="number">1</span>;
|
||
}
|
||
<span class="kw">let</span> <span class="ident">last</span>: <span class="ident">Number</span> <span class="op">=</span> {
|
||
<span class="kw">let</span> <span class="ident">slice</span> <span class="op">=</span> <span class="ident">numbers</span>[<span class="ident">numbers</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>];
|
||
<span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">slice</span>.<span class="ident">parse</span>())
|
||
};
|
||
<span class="kw">if</span> <span class="ident">largest_dec</span> <span class="op">></span> <span class="number">0</span> {
|
||
<span class="ident">largest_dec</span> <span class="op">-</span><span class="op">=</span> <span class="number">1</span>;
|
||
}
|
||
|
||
<span class="kw">let</span> <span class="ident">padding</span> <span class="op">=</span> <span class="ident">first</span>
|
||
.<span class="ident">num_digits</span>()
|
||
.<span class="ident">max</span>(<span class="ident">increment</span>.<span class="ident">num_digits</span>())
|
||
.<span class="ident">max</span>(<span class="ident">last</span>.<span class="ident">num_digits</span>());
|
||
<span class="kw">match</span> (<span class="ident">first</span>, <span class="ident">last</span>, <span class="ident">increment</span>) {
|
||
(<span class="ident">Number::MinusZero</span>, <span class="ident">Number::BigInt</span>(<span class="ident">last</span>), <span class="ident">Number::BigInt</span>(<span class="ident">increment</span>)) <span class="op">=</span><span class="op">></span> <span class="ident">print_seq_integers</span>(
|
||
(<span class="ident">BigInt::zero</span>(), <span class="ident">increment</span>, <span class="ident">last</span>),
|
||
<span class="ident">options</span>.<span class="ident">separator</span>,
|
||
<span class="ident">options</span>.<span class="ident">terminator</span>,
|
||
<span class="ident">options</span>.<span class="ident">widths</span>,
|
||
<span class="ident">padding</span>,
|
||
<span class="bool-val">true</span>,
|
||
),
|
||
(<span class="ident">Number::BigInt</span>(<span class="ident">first</span>), <span class="ident">Number::BigInt</span>(<span class="ident">last</span>), <span class="ident">Number::BigInt</span>(<span class="ident">increment</span>)) <span class="op">=</span><span class="op">></span> {
|
||
<span class="ident">print_seq_integers</span>(
|
||
(<span class="ident">first</span>, <span class="ident">increment</span>, <span class="ident">last</span>),
|
||
<span class="ident">options</span>.<span class="ident">separator</span>,
|
||
<span class="ident">options</span>.<span class="ident">terminator</span>,
|
||
<span class="ident">options</span>.<span class="ident">widths</span>,
|
||
<span class="ident">padding</span>,
|
||
<span class="bool-val">false</span>,
|
||
)
|
||
}
|
||
(<span class="ident">first</span>, <span class="ident">last</span>, <span class="ident">increment</span>) <span class="op">=</span><span class="op">></span> <span class="ident">print_seq</span>(
|
||
(<span class="ident">first</span>.<span class="ident">into_f64</span>(), <span class="ident">increment</span>.<span class="ident">into_f64</span>(), <span class="ident">last</span>.<span class="ident">into_f64</span>()),
|
||
<span class="ident">largest_dec</span>,
|
||
<span class="ident">options</span>.<span class="ident">separator</span>,
|
||
<span class="ident">options</span>.<span class="ident">terminator</span>,
|
||
<span class="ident">options</span>.<span class="ident">widths</span>,
|
||
<span class="ident">padding</span>,
|
||
),
|
||
}
|
||
<span class="number">0</span>
|
||
}
|
||
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">uu_app</span>() <span class="op">-</span><span class="op">></span> <span class="ident">App</span><span class="op"><</span><span class="lifetime">'static</span>, <span class="lifetime">'static</span><span class="op">></span> {
|
||
<span class="ident">App::new</span>(<span class="ident">uucore::util_name</span>())
|
||
.<span class="ident">setting</span>(<span class="ident">AppSettings::AllowLeadingHyphen</span>)
|
||
.<span class="ident">version</span>(<span class="macro">crate_version!</span>())
|
||
.<span class="ident">about</span>(<span class="ident">ABOUT</span>)
|
||
.<span class="ident">arg</span>(
|
||
<span class="ident">Arg::with_name</span>(<span class="ident">OPT_SEPARATOR</span>)
|
||
.<span class="ident">short</span>(<span class="string">"s"</span>)
|
||
.<span class="ident">long</span>(<span class="string">"separator"</span>)
|
||
.<span class="ident">help</span>(<span class="string">"Separator character (defaults to \\n)"</span>)
|
||
.<span class="ident">takes_value</span>(<span class="bool-val">true</span>)
|
||
.<span class="ident">number_of_values</span>(<span class="number">1</span>),
|
||
)
|
||
.<span class="ident">arg</span>(
|
||
<span class="ident">Arg::with_name</span>(<span class="ident">OPT_TERMINATOR</span>)
|
||
.<span class="ident">short</span>(<span class="string">"t"</span>)
|
||
.<span class="ident">long</span>(<span class="string">"terminator"</span>)
|
||
.<span class="ident">help</span>(<span class="string">"Terminator character (defaults to \\n)"</span>)
|
||
.<span class="ident">takes_value</span>(<span class="bool-val">true</span>)
|
||
.<span class="ident">number_of_values</span>(<span class="number">1</span>),
|
||
)
|
||
.<span class="ident">arg</span>(
|
||
<span class="ident">Arg::with_name</span>(<span class="ident">OPT_WIDTHS</span>)
|
||
.<span class="ident">short</span>(<span class="string">"w"</span>)
|
||
.<span class="ident">long</span>(<span class="string">"widths"</span>)
|
||
.<span class="ident">help</span>(<span class="string">"Equalize widths of all numbers by padding with zeros"</span>),
|
||
)
|
||
.<span class="ident">arg</span>(
|
||
<span class="ident">Arg::with_name</span>(<span class="ident">ARG_NUMBERS</span>)
|
||
.<span class="ident">multiple</span>(<span class="bool-val">true</span>)
|
||
.<span class="ident">takes_value</span>(<span class="bool-val">true</span>)
|
||
.<span class="ident">allow_hyphen_values</span>(<span class="bool-val">true</span>)
|
||
.<span class="ident">max_values</span>(<span class="number">3</span>)
|
||
.<span class="ident">required</span>(<span class="bool-val">true</span>),
|
||
)
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">done_printing</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Num</span> <span class="op">+</span> <span class="ident">PartialOrd</span><span class="op">></span>(<span class="ident">next</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">increment</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">last</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> {
|
||
<span class="kw">if</span> <span class="ident">increment</span> <span class="op">></span><span class="op">=</span> <span class="kw-2">&</span><span class="ident">T::zero</span>() {
|
||
<span class="ident">next</span> <span class="op">></span> <span class="ident">last</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="ident">next</span> <span class="op"><</span> <span class="ident">last</span>
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Floating point based code path</span>
|
||
<span class="kw">fn</span> <span class="ident">print_seq</span>(
|
||
<span class="ident">range</span>: <span class="ident">RangeF64</span>,
|
||
<span class="ident">largest_dec</span>: <span class="ident">usize</span>,
|
||
<span class="ident">separator</span>: <span class="ident">String</span>,
|
||
<span class="ident">terminator</span>: <span class="ident">String</span>,
|
||
<span class="ident">pad</span>: <span class="ident">bool</span>,
|
||
<span class="ident">padding</span>: <span class="ident">usize</span>,
|
||
) {
|
||
<span class="kw">let</span> (<span class="ident">first</span>, <span class="ident">increment</span>, <span class="ident">last</span>) <span class="op">=</span> <span class="ident">range</span>;
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">i</span> <span class="op">=</span> <span class="number">0isize</span>;
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">value</span> <span class="op">=</span> <span class="ident">first</span> <span class="op">+</span> <span class="ident">i</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">*</span> <span class="ident">increment</span>;
|
||
<span class="kw">while</span> <span class="op">!</span><span class="ident">done_printing</span>(<span class="kw-2">&</span><span class="ident">value</span>, <span class="kw-2">&</span><span class="ident">increment</span>, <span class="kw-2">&</span><span class="ident">last</span>) {
|
||
<span class="kw">let</span> <span class="ident">istr</span> <span class="op">=</span> <span class="macro">format!</span>(<span class="string">"{:.*}"</span>, <span class="ident">largest_dec</span>, <span class="ident">value</span>);
|
||
<span class="kw">let</span> <span class="ident">ilen</span> <span class="op">=</span> <span class="ident">istr</span>.<span class="ident">len</span>();
|
||
<span class="kw">let</span> <span class="ident">before_dec</span> <span class="op">=</span> <span class="ident">istr</span>.<span class="ident">find</span>(<span class="string">'.'</span>).<span class="ident">unwrap_or</span>(<span class="ident">ilen</span>);
|
||
<span class="kw">if</span> <span class="ident">pad</span> <span class="op">&&</span> <span class="ident">before_dec</span> <span class="op"><</span> <span class="ident">padding</span> {
|
||
<span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..(<span class="ident">padding</span> <span class="op">-</span> <span class="ident">before_dec</span>) {
|
||
<span class="macro">print!</span>(<span class="string">"0"</span>);
|
||
}
|
||
}
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">istr</span>);
|
||
<span class="ident">i</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
|
||
<span class="ident">value</span> <span class="op">=</span> <span class="ident">first</span> <span class="op">+</span> <span class="ident">i</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">*</span> <span class="ident">increment</span>;
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">done_printing</span>(<span class="kw-2">&</span><span class="ident">value</span>, <span class="kw-2">&</span><span class="ident">increment</span>, <span class="kw-2">&</span><span class="ident">last</span>) {
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">separator</span>);
|
||
}
|
||
}
|
||
<span class="kw">if</span> (<span class="ident">first</span> <span class="op">></span><span class="op">=</span> <span class="ident">last</span> <span class="op">&&</span> <span class="ident">increment</span> <span class="op"><</span> <span class="number">0f64</span>) <span class="op">|</span><span class="op">|</span> (<span class="ident">first</span> <span class="op"><</span><span class="op">=</span> <span class="ident">last</span> <span class="op">&&</span> <span class="ident">increment</span> <span class="op">></span> <span class="number">0f64</span>) {
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">terminator</span>);
|
||
}
|
||
<span class="macro">crash_if_err!</span>(<span class="number">1</span>, <span class="ident">stdout</span>().<span class="ident">flush</span>());
|
||
}
|
||
|
||
<span class="doccomment">/// Print an integer sequence.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// This function prints a sequence of integers defined by `range`,</span>
|
||
<span class="doccomment">/// which defines the first integer, last integer, and increment of the</span>
|
||
<span class="doccomment">/// range. The `separator` is inserted between each integer and</span>
|
||
<span class="doccomment">/// `terminator` is inserted at the end.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// The `pad` parameter indicates whether to pad numbers to the width</span>
|
||
<span class="doccomment">/// given in `padding`.</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// If `is_first_minus_zero` is `true`, then the `first` parameter is</span>
|
||
<span class="doccomment">/// printed as if it were negative zero, even though no such number</span>
|
||
<span class="doccomment">/// exists as an integer (negative zero only exists for floating point</span>
|
||
<span class="doccomment">/// numbers). Only set this to `true` if `first` is actually zero.</span>
|
||
<span class="kw">fn</span> <span class="ident">print_seq_integers</span>(
|
||
<span class="ident">range</span>: <span class="ident">RangeInt</span>,
|
||
<span class="ident">separator</span>: <span class="ident">String</span>,
|
||
<span class="ident">terminator</span>: <span class="ident">String</span>,
|
||
<span class="ident">pad</span>: <span class="ident">bool</span>,
|
||
<span class="ident">padding</span>: <span class="ident">usize</span>,
|
||
<span class="ident">is_first_minus_zero</span>: <span class="ident">bool</span>,
|
||
) {
|
||
<span class="kw">let</span> (<span class="ident">first</span>, <span class="ident">increment</span>, <span class="ident">last</span>) <span class="op">=</span> <span class="ident">range</span>;
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">value</span> <span class="op">=</span> <span class="ident">first</span>;
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">is_first_iteration</span> <span class="op">=</span> <span class="bool-val">true</span>;
|
||
<span class="kw">while</span> <span class="op">!</span><span class="ident">done_printing</span>(<span class="kw-2">&</span><span class="ident">value</span>, <span class="kw-2">&</span><span class="ident">increment</span>, <span class="kw-2">&</span><span class="ident">last</span>) {
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">is_first_iteration</span> {
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">separator</span>);
|
||
}
|
||
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">width</span> <span class="op">=</span> <span class="ident">padding</span>;
|
||
<span class="kw">if</span> <span class="ident">is_first_iteration</span> <span class="op">&&</span> <span class="ident">is_first_minus_zero</span> {
|
||
<span class="macro">print!</span>(<span class="string">"-"</span>);
|
||
<span class="ident">width</span> <span class="op">-</span><span class="op">=</span> <span class="number">1</span>;
|
||
}
|
||
<span class="ident">is_first_iteration</span> <span class="op">=</span> <span class="bool-val">false</span>;
|
||
<span class="kw">if</span> <span class="ident">pad</span> {
|
||
<span class="macro">print!</span>(<span class="string">"{number:>0width$}"</span>, <span class="ident">number</span> <span class="op">=</span> <span class="ident">value</span>, <span class="ident">width</span> <span class="op">=</span> <span class="ident">width</span>);
|
||
} <span class="kw">else</span> {
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">value</span>);
|
||
}
|
||
<span class="ident">value</span> <span class="op">+</span><span class="op">=</span> <span class="kw-2">&</span><span class="ident">increment</span>;
|
||
}
|
||
|
||
<span class="kw">if</span> <span class="op">!</span><span class="ident">is_first_iteration</span> {
|
||
<span class="macro">print!</span>(<span class="string">"{}"</span>, <span class="ident">terminator</span>);
|
||
}
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">tests</span> {
|
||
<span class="kw">use</span> <span class="kw">crate</span><span class="ident">::Number</span>;
|
||
<span class="kw">use</span> <span class="ident">num_bigint</span>::{<span class="ident">BigInt</span>, <span class="ident">Sign</span>};
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">test_number_num_digits</span>() {
|
||
<span class="macro">assert_eq!</span>(
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">BigInt::new</span>(<span class="ident">Sign::Plus</span>, <span class="macro">vec!</span>[<span class="number">123</span>])).<span class="ident">num_digits</span>(),
|
||
<span class="number">3</span>
|
||
);
|
||
<span class="macro">assert_eq!</span>(
|
||
<span class="ident">Number::BigInt</span>(<span class="ident">BigInt::new</span>(<span class="ident">Sign::Minus</span>, <span class="macro">vec!</span>[<span class="number">123</span>])).<span class="ident">num_digits</span>(),
|
||
<span class="number">4</span>
|
||
);
|
||
<span class="macro">assert_eq!</span>(<span class="ident">Number::F64</span>(<span class="number">123.45</span>).<span class="ident">num_digits</span>(), <span class="number">3</span>);
|
||
<span class="macro">assert_eq!</span>(<span class="ident">Number::MinusZero</span>.<span class="ident">num_digits</span>(), <span class="number">2</span>);
|
||
}
|
||
}
|
||
</pre></div>
|
||
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