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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
| <span id="2"> 2</span> |
| <span id="3"> 3</span> |
| <span id="4"> 4</span> |
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| <span id="140">140</span> |
| <span id="141">141</span> |
| <span id="142">142</span> |
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| </pre><pre class="rust "> |
| <span class="doccomment">/*! |
| An implementation of the |
| [Aho-Corasick string search algorithm](https://en.wikipedia.org/wiki/Aho%E2%80%93Corasick_string_matching_algorithm). |
| |
| The Aho-Corasick algorithm is principally useful when you need to search many |
| large texts for a fixed (possibly large) set of keywords. In particular, the |
| Aho-Corasick algorithm preprocesses the set of keywords by constructing a |
| finite state machine. The search phase is then a quick linear scan through the |
| text. Each character in the search text causes a state transition in the |
| automaton. Matches are reported when the automaton enters a match state. |
| |
| # Examples |
| |
| The main type exposed by this crate is `AcAutomaton`, which can be constructed |
| from an iterator of pattern strings: |
| |
| ```rust |
| use aho_corasick::{Automaton, AcAutomaton}; |
| |
| let aut = AcAutomaton::new(vec!["apple", "maple"]); |
| |
| // AcAutomaton also implements `FromIterator`: |
| let aut: AcAutomaton<&str> = ["apple", "maple"].iter().cloned().collect(); |
| ``` |
| |
| Finding matches can be done with `find`: |
| |
| ```rust |
| use aho_corasick::{Automaton, AcAutomaton, Match}; |
| |
| let aut = AcAutomaton::new(vec!["apple", "maple"]); |
| let mut it = aut.find("I like maple apples."); |
| assert_eq!(it.next(), Some(Match { |
| pati: 1, |
| start: 7, |
| end: 12, |
| })); |
| assert_eq!(it.next(), Some(Match { |
| pati: 0, |
| start: 13, |
| end: 18, |
| })); |
| assert_eq!(it.next(), None); |
| ``` |
| |
| Use `find_overlapping` if you want to report all matches, even if they |
| overlap with each other. |
| |
| ```rust |
| use aho_corasick::{Automaton, AcAutomaton, Match}; |
| |
| let aut = AcAutomaton::new(vec!["abc", "a"]); |
| let matches: Vec<_> = aut.find_overlapping("abc").collect(); |
| assert_eq!(matches, vec![ |
| Match { pati: 1, start: 0, end: 1}, Match { pati: 0, start: 0, end: 3 }, |
| ]); |
| |
| // Regular `find` will report only one match: |
| let matches: Vec<_> = aut.find("abc").collect(); |
| assert_eq!(matches, vec![Match { pati: 1, start: 0, end: 1}]); |
| ``` |
| |
| Finally, there are also methods for finding matches on *streams*. Namely, the |
| search text does not have to live in memory. It's useful to run this on files |
| that can't fit into memory: |
| |
| ```no_run |
| use std::fs::File; |
| |
| use aho_corasick::{Automaton, AcAutomaton}; |
| |
| let aut = AcAutomaton::new(vec!["foo", "bar", "baz"]); |
| let rdr = File::open("search.txt").unwrap(); |
| for m in aut.stream_find(rdr) { |
| let m = m.unwrap(); // could be an IO error |
| println!("Pattern '{}' matched at: ({}, {})", |
| aut.pattern(m.pati), m.start, m.end); |
| } |
| ``` |
| |
| There is also `stream_find_overlapping`, which is just like `find_overlapping`, |
| but it operates on streams. |
| |
| Please see `dict-search.rs` in this crate's `examples` directory for a more |
| complete example. It creates a large automaton from a dictionary and can do a |
| streaming match over arbitrarily large data. |
| |
| # Memory usage |
| |
| A key aspect of an Aho-Corasick implementation is how the state transitions |
| are represented. The easiest way to make the automaton fast is to store a |
| sparse 256-slot map in each state. It maps an input byte to a state index. |
| This makes the matching loop extremely fast, since it translates to a simple |
| pointer read. |
| |
| The problem is that as the automaton accumulates more states, you end up paying |
| a `256 * 4` (`4` is for the `u32` state index) byte penalty for every state |
| regardless of how many transitions it has. |
| |
| To solve this, only states near the root of the automaton have this sparse |
| map representation. States near the leaves of the automaton use a dense mapping |
| that requires a linear scan. |
| |
| (The specific limit currently set is `3`, so that states with a depth less than |
| or equal to `3` are less memory efficient. The result is that the memory usage |
| of the automaton stops growing rapidly past ~60MB, even for automatons with |
| thousands of patterns.) |
| |
| If you'd like to opt for the less-memory-efficient-but-faster version, then |
| you can construct an `AcAutomaton` with a `Sparse` transition strategy: |
| |
| ```rust |
| use aho_corasick::{Automaton, AcAutomaton, Match, Sparse}; |
| |
| let aut = AcAutomaton::<&str, Sparse>::with_transitions(vec!["abc", "a"]); |
| let matches: Vec<_> = aut.find("abc").collect(); |
| assert_eq!(matches, vec![Match { pati: 1, start: 0, end: 1}]); |
| ``` |
| */</span> |
| |
| <span class="attribute">#<span class="op">!</span>[<span class="ident">deny</span>(<span class="ident">missing_docs</span>)]</span> |
| |
| <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">memchr</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">quickcheck</span>; |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">rand</span>; |
| |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">VecDeque</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">FromIterator</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>; |
| |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">autiter</span>::{ |
| <span class="ident">Automaton</span>, <span class="ident">Match</span>, |
| <span class="ident">Matches</span>, <span class="ident">MatchesOverlapping</span>, <span class="ident">StreamMatches</span>, <span class="ident">StreamMatchesOverlapping</span>, |
| }; |
| <span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span>::<span class="ident">full</span>::<span class="ident">FullAcAutomaton</span>; |
| |
| <span class="comment">// We're specifying paths explicitly so that we can use</span> |
| <span class="comment">// these modules simultaneously from `main.rs`.</span> |
| <span class="comment">// Should probably make just make `main.rs` a separate crate.</span> |
| <span class="attribute">#[<span class="ident">path</span> <span class="op">=</span> <span class="string">"autiter.rs"</span>]</span> |
| <span class="kw">mod</span> <span class="ident">autiter</span>; |
| <span class="attribute">#[<span class="ident">path</span> <span class="op">=</span> <span class="string">"full.rs"</span>]</span> |
| <span class="kw">mod</span> <span class="ident">full</span>; |
| |
| <span class="doccomment">/// The integer type used for the state index.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// Limiting this to 32 bit integers can have a big impact on memory usage</span> |
| <span class="doccomment">/// when using the `Sparse` transition representation.</span> |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">StateIdx</span> <span class="op">=</span> <span class="ident">u32</span>; |
| |
| <span class="comment">// Constants for special state indexes.</span> |
| <span class="kw">const</span> <span class="ident">FAIL_STATE</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">0</span>; |
| <span class="kw">const</span> <span class="ident">ROOT_STATE</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1</span>; |
| |
| <span class="comment">// Limit the depth at which we use a sparse alphabet map. Once the limit is</span> |
| <span class="comment">// reached, a dense set is used (and lookup becomes O(n)).</span> |
| <span class="comment">//</span> |
| <span class="comment">// This does have a performance hit, but the (straight forward) alternative</span> |
| <span class="comment">// is to have a `256 * 4` byte overhead for every state.</span> |
| <span class="comment">// Given that Aho-Corasick is typically used for dictionary searching, this</span> |
| <span class="comment">// can lead to dramatic memory bloat.</span> |
| <span class="comment">//</span> |
| <span class="comment">// This limit should only be increased at your peril. Namely, in the worst</span> |
| <span class="comment">// case, `256^DENSE_DEPTH_THRESHOLD * 4` corresponds to the memory usage in</span> |
| <span class="comment">// bytes. A value of `1` gives us a good balance. This is also a happy point</span> |
| <span class="comment">// in the benchmarks. A value of `0` gives considerably worse times on certain</span> |
| <span class="comment">// benchmarks (e.g., `ac_ten_one_prefix_byte_every_match`) than even a value</span> |
| <span class="comment">// of `1`. A value of `2` is slightly better than `1` and it looks like gains</span> |
| <span class="comment">// level off at that point with not much observable difference when set to</span> |
| <span class="comment">// `3`.</span> |
| <span class="comment">//</span> |
| <span class="comment">// Why not make this user configurable? Well, it doesn't make much sense</span> |
| <span class="comment">// because we pay for it with case analysis in the matching loop. Increasing it</span> |
| <span class="comment">// doesn't have much impact on performance (outside of pathological cases?).</span> |
| <span class="comment">//</span> |
| <span class="comment">// N.B. Someone else seems to have discovered an alternative, but I haven't</span> |
| <span class="comment">// grokked it yet: https://github.com/mischasan/aho-corasick</span> |
| <span class="kw">const</span> <span class="ident">DENSE_DEPTH_THRESHOLD</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1</span>; |
| |
| <span class="doccomment">/// An Aho-Corasick finite automaton.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The type parameter `P` is the type of the pattern that was used to</span> |
| <span class="doccomment">/// construct this AcAutomaton.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">=</span><span class="ident">Dense</span><span class="op">></span> { |
| <span class="ident">pats</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">P</span><span class="op">></span>, |
| <span class="ident">states</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>, |
| <span class="ident">start_bytes</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>, |
| } |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span> |
| <span class="kw">struct</span> <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="ident">out</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>, |
| <span class="ident">fail</span>: <span class="ident">StateIdx</span>, |
| <span class="ident">goto</span>: <span class="ident">T</span>, |
| <span class="ident">depth</span>: <span class="ident">u32</span>, |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">>></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span><span class="op">></span> { |
| <span class="doccomment">/// Create a new automaton from an iterator of patterns.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The patterns must be convertible to bytes (`&[u8]`) via the `AsRef`</span> |
| <span class="doccomment">/// trait.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="ident">pats</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">Dense</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">P</span><span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">with_transitions</span>(<span class="ident">pats</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span>, <span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="doccomment">/// Create a new automaton from an iterator of patterns.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This constructor allows one to choose the transition representation.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// The patterns must be convertible to bytes (`&[u8]`) via the `AsRef`</span> |
| <span class="doccomment">/// trait.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">with_transitions</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="ident">pats</span>: <span class="ident">I</span>) <span class="op">-></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">I</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">P</span><span class="op">></span> { |
| <span class="ident">AcAutomaton</span> { |
| <span class="ident">pats</span>: <span class="macro">vec</span><span class="macro">!</span>[], <span class="comment">// filled in later, avoid wrath of borrow checker</span> |
| <span class="ident">states</span>: <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">State</span>::<span class="ident">new</span>(<span class="number">0</span>), <span class="ident">State</span>::<span class="ident">new</span>(<span class="number">0</span>)], <span class="comment">// empty and root</span> |
| <span class="ident">start_bytes</span>: <span class="macro">vec</span><span class="macro">!</span>[], <span class="comment">// also filled in later</span> |
| }.<span class="ident">build</span>(<span class="ident">pats</span>.<span class="ident">into_iter</span>().<span class="ident">collect</span>()) |
| } |
| |
| <span class="doccomment">/// Build out the entire automaton into a single matrix.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This will make searching as fast as possible at the expense of using</span> |
| <span class="doccomment">/// at least `4 * 256 * #states` bytes of memory.</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_full</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">FullAcAutomaton</span><span class="op"><</span><span class="ident">P</span><span class="op">></span> { |
| <span class="ident">FullAcAutomaton</span>::<span class="ident">new</span>(<span class="self">self</span>) |
| } |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">num_states</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">len</span>() |
| } |
| |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">heap_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="ident">pats</span>.<span class="ident">iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">P</span><span class="op">></span>() <span class="op">+</span> <span class="ident">p</span>.<span class="ident">as_ref</span>().<span class="ident">len</span>()) |
| .<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">a</span> <span class="op">+</span> <span class="ident">b</span>) |
| <span class="op">+</span> <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">iter</span>() |
| .<span class="ident">map</span>(<span class="op">|</span><span class="ident">s</span><span class="op">|</span> <span class="ident">mem</span>::<span class="ident">size_of</span>::<span class="op"><</span><span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">>></span>() <span class="op">+</span> <span class="ident">s</span>.<span class="ident">heap_bytes</span>()) |
| .<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">a</span> <span class="op">+</span> <span class="ident">b</span>) |
| <span class="op">+</span> <span class="self">self</span>.<span class="ident">start_bytes</span>.<span class="ident">len</span>() |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span>, <span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">Automaton</span><span class="op"><</span><span class="ident">P</span><span class="op">></span> <span class="kw">for</span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">next_state</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">si</span>: <span class="ident">StateIdx</span>, <span class="ident">b</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">StateIdx</span> { |
| <span class="kw">loop</span> { |
| <span class="kw">let</span> <span class="ident">maybe_si</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">b</span>); |
| <span class="kw">if</span> <span class="ident">maybe_si</span> <span class="op">!=</span> <span class="ident">FAIL_STATE</span> { |
| <span class="ident">si</span> <span class="op">=</span> <span class="ident">maybe_si</span>; |
| <span class="kw">break</span>; |
| } <span class="kw">else</span> { |
| <span class="ident">si</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">fail</span>; |
| } |
| } |
| <span class="ident">si</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">get_match</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>, <span class="ident">outi</span>: <span class="ident">usize</span>, <span class="ident">texti</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">Match</span> { |
| <span class="kw">let</span> <span class="ident">pati</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">out</span>[<span class="ident">outi</span>]; |
| <span class="kw">let</span> <span class="ident">patlen</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">pats</span>[<span class="ident">pati</span>].<span class="ident">as_ref</span>().<span class="ident">len</span>(); |
| <span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">texti</span> <span class="op">+</span> <span class="number">1</span> <span class="op">-</span> <span class="ident">patlen</span>; |
| <span class="ident">Match</span> { |
| <span class="ident">pati</span>: <span class="ident">pati</span>, |
| <span class="ident">start</span>: <span class="ident">start</span>, |
| <span class="ident">end</span>: <span class="ident">start</span> <span class="op">+</span> <span class="ident">patlen</span>, |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">has_match</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>, <span class="ident">outi</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="ident">outi</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">out</span>.<span class="ident">len</span>() |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">start_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">start_bytes</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">patterns</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">P</span>] { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">pats</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">pattern</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">i</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="ident">P</span> { |
| <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">pats</span>[<span class="ident">i</span>] |
| } |
| } |
| |
| <span class="comment">// Below contains code for *building* the automaton. It's a reasonably faithful</span> |
| <span class="comment">// translation of the description/psuedo-code from:</span> |
| <span class="comment">// http://www.cs.uku.fi/~kilpelai/BSA05/lectures/slides04.pdf</span> |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span>, <span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="comment">// This is the first phase and builds the initial keyword tree.</span> |
| <span class="kw">fn</span> <span class="ident">build</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">pats</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">P</span><span class="op">></span>) <span class="op">-></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="kw">for</span> (<span class="ident">pati</span>, <span class="ident">pat</span>) <span class="kw">in</span> <span class="ident">pats</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>() { |
| <span class="kw">if</span> <span class="ident">pat</span>.<span class="ident">as_ref</span>().<span class="ident">is_empty</span>() { |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">previ</span> <span class="op">=</span> <span class="ident">ROOT_STATE</span>; |
| <span class="kw">for</span> <span class="kw-2">&</span><span class="ident">b</span> <span class="kw">in</span> <span class="ident">pat</span>.<span class="ident">as_ref</span>() { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">previ</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">b</span>) <span class="op">!=</span> <span class="ident">FAIL_STATE</span> { |
| <span class="ident">previ</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">previ</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">b</span>); |
| } <span class="kw">else</span> { |
| <span class="kw">let</span> <span class="ident">depth</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">previ</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">depth</span> <span class="op">+</span> <span class="number">1</span>; |
| <span class="kw">let</span> <span class="ident">nexti</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">add_state</span>(<span class="ident">State</span>::<span class="ident">new</span>(<span class="ident">depth</span>)); |
| <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">previ</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">set_goto</span>(<span class="ident">b</span>, <span class="ident">nexti</span>); |
| <span class="ident">previ</span> <span class="op">=</span> <span class="ident">nexti</span>; |
| } |
| } |
| <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">previ</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">out</span>.<span class="ident">push</span>(<span class="ident">pati</span>); |
| } |
| <span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> (<span class="number">0</span>..<span class="number">256</span>).<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">c</span><span class="op">|</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">ROOT_STATE</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">c</span>) <span class="op">==</span> <span class="ident">FAIL_STATE</span> { |
| <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">ROOT_STATE</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">set_goto</span>(<span class="ident">c</span>, <span class="ident">ROOT_STATE</span>); |
| } <span class="kw">else</span> { |
| <span class="self">self</span>.<span class="ident">start_bytes</span>.<span class="ident">push</span>(<span class="ident">c</span>); |
| } |
| } |
| <span class="comment">// If any of the start bytes are non-ASCII, then remove them all,</span> |
| <span class="comment">// because we don't want to be calling memchr on non-ASCII bytes.</span> |
| <span class="comment">// (Well, we could, but it requires being more clever. Simply using</span> |
| <span class="comment">// the prefix byte isn't good enough.)</span> |
| <span class="kw">if</span> <span class="self">self</span>.<span class="ident">start_bytes</span>.<span class="ident">iter</span>().<span class="ident">any</span>(<span class="op">|</span><span class="kw-2">&</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span> <span class="op">></span> <span class="number">0x7F</span>) { |
| <span class="self">self</span>.<span class="ident">start_bytes</span>.<span class="ident">clear</span>(); |
| } |
| <span class="self">self</span>.<span class="ident">pats</span> <span class="op">=</span> <span class="ident">pats</span>; |
| <span class="self">self</span>.<span class="ident">fill</span>() |
| } |
| |
| <span class="comment">// The second phase that fills in the back links.</span> |
| <span class="kw">fn</span> <span class="ident">fill</span>(<span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="comment">// Fill up the queue with all non-root transitions out of the root</span> |
| <span class="comment">// node. Then proceed by breadth first traversal.</span> |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">q</span> <span class="op">=</span> <span class="ident">VecDeque</span>::<span class="ident">new</span>(); |
| <span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> (<span class="number">0</span>..<span class="number">256</span>).<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">c</span><span class="op">|</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">let</span> <span class="ident">si</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">ROOT_STATE</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">c</span>); |
| <span class="kw">if</span> <span class="ident">si</span> <span class="op">!=</span> <span class="ident">ROOT_STATE</span> { |
| <span class="ident">q</span>.<span class="ident">push_front</span>(<span class="ident">si</span>); |
| } |
| } |
| <span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">si</span>) <span class="op">=</span> <span class="ident">q</span>.<span class="ident">pop_back</span>() { |
| <span class="kw">for</span> <span class="ident">c</span> <span class="kw">in</span> (<span class="number">0</span>..<span class="number">256</span>).<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">c</span><span class="op">|</span> <span class="ident">c</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">let</span> <span class="ident">u</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">c</span>); |
| <span class="kw">if</span> <span class="ident">u</span> <span class="op">!=</span> <span class="ident">FAIL_STATE</span> { |
| <span class="ident">q</span>.<span class="ident">push_front</span>(<span class="ident">u</span>); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">v</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">si</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">fail</span>; |
| <span class="kw">while</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">v</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">c</span>) <span class="op">==</span> <span class="ident">FAIL_STATE</span> { |
| <span class="ident">v</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">v</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">fail</span>; |
| } |
| <span class="kw">let</span> <span class="ident">ufail</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">v</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">goto</span>(<span class="ident">c</span>); |
| <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">u</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">fail</span> <span class="op">=</span> <span class="ident">ufail</span>; |
| <span class="kw">let</span> <span class="ident">ufail_out</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">ufail</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">out</span>.<span class="ident">clone</span>(); |
| <span class="self">self</span>.<span class="ident">states</span>[<span class="ident">u</span> <span class="kw">as</span> <span class="ident">usize</span>].<span class="ident">out</span>.<span class="ident">extend</span>(<span class="ident">ufail_out</span>); |
| } |
| } |
| } |
| <span class="self">self</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">add_state</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">state</span>: <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>) <span class="op">-></span> <span class="ident">StateIdx</span> { |
| <span class="kw">let</span> <span class="ident">i</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">len</span>(); |
| <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">push</span>(<span class="ident">state</span>); |
| <span class="ident">i</span> <span class="kw">as</span> <span class="ident">StateIdx</span> |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">depth</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="ident">State</span> { |
| <span class="ident">out</span>: <span class="macro">vec</span><span class="macro">!</span>[], |
| <span class="ident">fail</span>: <span class="number">1</span>, |
| <span class="ident">goto</span>: <span class="ident">Transitions</span>::<span class="ident">new</span>(<span class="ident">depth</span>), |
| <span class="ident">depth</span>: <span class="ident">depth</span>, |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">goto</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">b</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">StateIdx</span> { |
| <span class="self">self</span>.<span class="ident">goto</span>.<span class="ident">goto</span>(<span class="ident">b</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_goto</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">b</span>: <span class="ident">u8</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>) { |
| <span class="self">self</span>.<span class="ident">goto</span>.<span class="ident">set_goto</span>(<span class="ident">b</span>, <span class="ident">si</span>); |
| } |
| |
| <span class="kw">fn</span> <span class="ident">heap_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| (<span class="self">self</span>.<span class="ident">out</span>.<span class="ident">len</span>() <span class="op">*</span> <span class="ident">usize_bytes</span>()) |
| <span class="op">+</span> <span class="self">self</span>.<span class="ident">goto</span>.<span class="ident">heap_bytes</span>() |
| } |
| } |
| |
| <span class="doccomment">/// An abstraction over state transition strategies.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This is an attempt to let the caller choose the space/time trade offs</span> |
| <span class="doccomment">/// used for state transitions.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// (It's possible that this interface is merely good enough for just the two</span> |
| <span class="doccomment">/// implementations in this crate.)</span> |
| <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">Transitions</span> { |
| <span class="doccomment">/// Return a new state at the given depth.</span> |
| <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">depth</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="self">Self</span>; |
| <span class="doccomment">/// Return the next state index given the next character.</span> |
| <span class="kw">fn</span> <span class="ident">goto</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">alpha</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">StateIdx</span>; |
| <span class="doccomment">/// Set the next state index for the character given.</span> |
| <span class="kw">fn</span> <span class="ident">set_goto</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">alpha</span>: <span class="ident">u8</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>); |
| <span class="doccomment">/// The memory use in bytes (on the heap) of this set of transitions.</span> |
| <span class="kw">fn</span> <span class="ident">heap_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span>; |
| } |
| |
| <span class="doccomment">/// State transitions that can be stored either sparsely or densely.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This uses less space but at the expense of slower matching.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Dense</span>(<span class="ident">DenseChoice</span>); |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">enum</span> <span class="ident">DenseChoice</span> { |
| <span class="ident">Sparse</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">StateIdx</span><span class="op">></span>), <span class="comment">// indexed by alphabet</span> |
| <span class="ident">Dense</span>(<span class="ident">Vec</span><span class="op"><</span>(<span class="ident">u8</span>, <span class="ident">StateIdx</span>)<span class="op">></span>), |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Transitions</span> <span class="kw">for</span> <span class="ident">Dense</span> { |
| <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">depth</span>: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">Dense</span> { |
| <span class="kw">if</span> <span class="ident">depth</span> <span class="op"><=</span> <span class="ident">DENSE_DEPTH_THRESHOLD</span> { |
| <span class="ident">Dense</span>(<span class="ident">DenseChoice</span>::<span class="ident">Sparse</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>; <span class="number">256</span>])) |
| } <span class="kw">else</span> { |
| <span class="ident">Dense</span>(<span class="ident">DenseChoice</span>::<span class="ident">Dense</span>(<span class="macro">vec</span><span class="macro">!</span>[])) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">goto</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">b1</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">StateIdx</span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> { |
| <span class="ident">DenseChoice</span>::<span class="ident">Sparse</span>(<span class="kw-2">ref</span> <span class="ident">m</span>) <span class="op">=></span> <span class="ident">m</span>[<span class="ident">b1</span> <span class="kw">as</span> <span class="ident">usize</span>], |
| <span class="ident">DenseChoice</span>::<span class="ident">Dense</span>(<span class="kw-2">ref</span> <span class="ident">m</span>) <span class="op">=></span> { |
| <span class="kw">for</span> <span class="kw-2">&</span>(<span class="ident">b2</span>, <span class="ident">si</span>) <span class="kw">in</span> <span class="ident">m</span> { |
| <span class="kw">if</span> <span class="ident">b1</span> <span class="op">==</span> <span class="ident">b2</span> { |
| <span class="kw">return</span> <span class="ident">si</span>; |
| } |
| } |
| <span class="ident">FAIL_STATE</span> |
| } |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_goto</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">b</span>: <span class="ident">u8</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>) { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> { |
| <span class="ident">DenseChoice</span>::<span class="ident">Sparse</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">m</span>) <span class="op">=></span> <span class="ident">m</span>[<span class="ident">b</span> <span class="kw">as</span> <span class="ident">usize</span>] <span class="op">=</span> <span class="ident">si</span>, |
| <span class="ident">DenseChoice</span>::<span class="ident">Dense</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="ident">m</span>) <span class="op">=></span> <span class="ident">m</span>.<span class="ident">push</span>((<span class="ident">b</span>, <span class="ident">si</span>)), |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">heap_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span> { |
| <span class="ident">DenseChoice</span>::<span class="ident">Sparse</span>(<span class="kw-2">ref</span> <span class="ident">m</span>) <span class="op">=></span> <span class="ident">m</span>.<span class="ident">len</span>() <span class="op">*</span> <span class="number">4</span>, |
| <span class="ident">DenseChoice</span>::<span class="ident">Dense</span>(<span class="kw-2">ref</span> <span class="ident">m</span>) <span class="op">=></span> <span class="ident">m</span>.<span class="ident">len</span>() <span class="op">*</span> (<span class="number">1</span> <span class="op">+</span> <span class="number">4</span>), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// State transitions that are always sparse.</span> |
| <span class="doccomment">///</span> |
| <span class="doccomment">/// This can use enormous amounts of memory when there are many patterns,</span> |
| <span class="doccomment">/// but matching is very fast.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Sparse</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">StateIdx</span><span class="op">></span>); |
| |
| <span class="kw">impl</span> <span class="ident">Transitions</span> <span class="kw">for</span> <span class="ident">Sparse</span> { |
| <span class="kw">fn</span> <span class="ident">new</span>(_: <span class="ident">u32</span>) <span class="op">-></span> <span class="ident">Sparse</span> { |
| <span class="ident">Sparse</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="number">0</span>; <span class="number">256</span>]) |
| } |
| |
| <span class="attribute">#[<span class="ident">inline</span>]</span> |
| <span class="kw">fn</span> <span class="ident">goto</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">b</span>: <span class="ident">u8</span>) <span class="op">-></span> <span class="ident">StateIdx</span> { |
| <span class="self">self</span>.<span class="number">0</span>[<span class="ident">b</span> <span class="kw">as</span> <span class="ident">usize</span>] |
| } |
| |
| <span class="kw">fn</span> <span class="ident">set_goto</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">b</span>: <span class="ident">u8</span>, <span class="ident">si</span>: <span class="ident">StateIdx</span>) { |
| <span class="self">self</span>.<span class="number">0</span>[<span class="ident">b</span> <span class="kw">as</span> <span class="ident">usize</span>] <span class="op">=</span> <span class="ident">si</span>; |
| } |
| |
| <span class="kw">fn</span> <span class="ident">heap_bytes</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="self">self</span>.<span class="number">0</span>.<span class="ident">len</span>() <span class="op">*</span> <span class="number">4</span> |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">>></span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="kw">for</span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> { |
| <span class="doccomment">/// Create an automaton from an iterator of strings.</span> |
| <span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="ident">it</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">S</span><span class="op">></span> <span class="kw">where</span> <span class="ident">T</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">S</span><span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">it</span>) |
| } |
| } |
| |
| <span class="comment">// Provide some question debug impls for viewing automatons.</span> |
| <span class="comment">// The custom impls mostly exist for special showing of sparse maps.</span> |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="op">+</span> <span class="ident">fmt</span>::<span class="ident">Debug</span>, <span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> |
| <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">P</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>::<span class="ident">repeat</span>; |
| |
| <span class="macro">try</span><span class="macro">!</span>(<span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="ident">repeat</span>(<span class="string">'-'</span>).<span class="ident">take</span>(<span class="number">79</span>).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>())); |
| <span class="macro">try</span><span class="macro">!</span>(<span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Patterns: {:?}"</span>, <span class="self">self</span>.<span class="ident">pats</span>)); |
| <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">state</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>().<span class="ident">skip</span>(<span class="number">1</span>) { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{:3}: {}"</span>, <span class="ident">i</span>, <span class="ident">state</span>.<span class="ident">debug</span>(<span class="ident">i</span> <span class="op">==</span> <span class="number">1</span>))); |
| } |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="ident">repeat</span>(<span class="string">'-'</span>).<span class="ident">take</span>(<span class="number">79</span>).<span class="ident">collect</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>()) |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">debug</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">root</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="macro">format</span><span class="macro">!</span>(<span class="string">"State {{ depth: {:?}, out: {:?}, fail: {:?}, goto: {{{}}} }}"</span>, |
| <span class="self">self</span>.<span class="ident">depth</span>, <span class="self">self</span>.<span class="ident">out</span>, <span class="self">self</span>.<span class="ident">fail</span>, <span class="self">self</span>.<span class="ident">goto_string</span>(<span class="ident">root</span>)) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">goto_string</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">root</span>: <span class="ident">bool</span>) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>::<span class="ident">from_u32</span>; |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">goto</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[]; |
| <span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> (<span class="number">0</span>..<span class="number">256</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">let</span> <span class="ident">si</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">goto</span>(<span class="ident">b</span>); |
| <span class="kw">if</span> (<span class="op">!</span><span class="ident">root</span> <span class="op">&&</span> <span class="ident">si</span> <span class="op">==</span> <span class="ident">FAIL_STATE</span>) <span class="op">||</span> (<span class="ident">root</span> <span class="op">&&</span> <span class="ident">si</span> <span class="op">==</span> <span class="ident">ROOT_STATE</span>) { |
| <span class="kw">continue</span>; |
| } |
| <span class="ident">goto</span>.<span class="ident">push</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">"{} => {}"</span>, <span class="ident">from_u32</span>(<span class="ident">b</span> <span class="kw">as</span> <span class="ident">u32</span>).<span class="ident">unwrap</span>(), <span class="ident">si</span>)); |
| } |
| <span class="ident">goto</span>.<span class="ident">join</span>(<span class="string">", "</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">State</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> { |
| <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { |
| <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"{}"</span>, <span class="self">self</span>.<span class="ident">debug</span>(<span class="bool-val">false</span>)) |
| } |
| } |
| |
| <span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Transitions</span><span class="op">></span> <span class="ident">AcAutomaton</span><span class="op"><</span><span class="ident">String</span>, <span class="ident">T</span><span class="op">></span> { |
| <span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dot</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">String</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>::<span class="ident">Write</span>; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">new</span>(); |
| <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">w</span> { |
| (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">w</span>:<span class="ident">expr</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tt</span>:<span class="ident">tt</span>)<span class="kw-2">*</span>) <span class="op">=></span> { {<span class="macro">write</span><span class="macro">!</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">w</span>, $(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">tt</span>)<span class="kw-2">*</span>)}.<span class="ident">unwrap</span>() } |
| } |
| |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">r#" |
| digraph automaton {{ |
| label=<<FONT POINT-SIZE="20">{}</FONT>>; |
| labelloc="l"; |
| labeljust="l"; |
| rankdir="LR"; |
| "#</span>, <span class="self">self</span>.<span class="ident">pats</span>.<span class="ident">join</span>(<span class="string">", "</span>)); |
| <span class="kw">for</span> (<span class="ident">i</span>, <span class="ident">s</span>) <span class="kw">in</span> <span class="self">self</span>.<span class="ident">states</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>().<span class="ident">skip</span>(<span class="number">1</span>) { |
| <span class="kw">let</span> <span class="ident">i</span> <span class="op">=</span> <span class="ident">i</span> <span class="kw">as</span> <span class="ident">u32</span>; |
| <span class="kw">if</span> <span class="ident">s</span>.<span class="ident">out</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span> { |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">" {};\n"</span>, <span class="ident">i</span>); |
| } <span class="kw">else</span> { |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">" {} [peripheries=2];\n"</span>, <span class="ident">i</span>); |
| } |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">" {} -> {} [style=dashed];\n"</span>, <span class="ident">i</span>, <span class="ident">s</span>.<span class="ident">fail</span>); |
| <span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> (<span class="number">0</span>..<span class="number">256</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">b</span><span class="op">|</span> <span class="ident">b</span> <span class="kw">as</span> <span class="ident">u8</span>) { |
| <span class="kw">let</span> <span class="ident">si</span> <span class="op">=</span> <span class="ident">s</span>.<span class="ident">goto</span>(<span class="ident">b</span>); |
| <span class="kw">if</span> <span class="ident">si</span> <span class="op">==</span> <span class="ident">FAIL_STATE</span> <span class="op">||</span> (<span class="ident">i</span> <span class="op">==</span> <span class="ident">ROOT_STATE</span> <span class="op">&&</span> <span class="ident">si</span> <span class="op">==</span> <span class="ident">ROOT_STATE</span>) { |
| <span class="kw">continue</span>; |
| } |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">" {} -> {} [label={}];\n"</span>, <span class="ident">i</span>, <span class="ident">si</span>, <span class="ident">b</span> <span class="kw">as</span> <span class="ident">char</span>); |
| } |
| } |
| <span class="macro">w</span><span class="macro">!</span>(<span class="ident">out</span>, <span class="string">"}}"</span>); |
| <span class="ident">out</span> |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">vec_bytes</span>() <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="ident">usize_bytes</span>() <span class="op">*</span> <span class="number">3</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">usize_bytes</span>() <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="kw">let</span> <span class="ident">bits</span> <span class="op">=</span> <span class="ident">usize</span>::<span class="ident">max_value</span>().<span class="ident">count_ones</span>() <span class="kw">as</span> <span class="ident">usize</span>; |
| <span class="ident">bits</span> <span class="op">/</span> <span class="number">8</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="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashSet</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>; |
| |
| <span class="kw">use</span> <span class="ident">quickcheck</span>::{<span class="ident">Arbitrary</span>, <span class="ident">Gen</span>, <span class="ident">quickcheck</span>}; |
| |
| <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">Automaton</span>, <span class="ident">AcAutomaton</span>, <span class="ident">Match</span>}; |
| |
| <span class="kw">fn</span> <span class="ident">aut_find</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()).<span class="ident">find</span>(<span class="kw-2">&</span><span class="ident">haystack</span>).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_finds</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">cur</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Cursor</span>::<span class="ident">new</span>(<span class="ident">haystack</span>.<span class="ident">as_bytes</span>()); |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()) |
| .<span class="ident">stream_find</span>(<span class="ident">cur</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">unwrap</span>()).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findf</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()).<span class="ident">into_full</span>().<span class="ident">find</span>(<span class="ident">haystack</span>).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findfs</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">cur</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Cursor</span>::<span class="ident">new</span>(<span class="ident">haystack</span>.<span class="ident">as_bytes</span>()); |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()) |
| .<span class="ident">into_full</span>() |
| .<span class="ident">stream_find</span>(<span class="ident">cur</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">unwrap</span>()).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findo</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()).<span class="ident">find_overlapping</span>(<span class="ident">haystack</span>).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findos</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">cur</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Cursor</span>::<span class="ident">new</span>(<span class="ident">haystack</span>.<span class="ident">as_bytes</span>()); |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()) |
| .<span class="ident">stream_find_overlapping</span>(<span class="ident">cur</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">unwrap</span>()).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findfo</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()) |
| .<span class="ident">into_full</span>().<span class="ident">find_overlapping</span>(<span class="ident">haystack</span>).<span class="ident">collect</span>() |
| } |
| |
| <span class="kw">fn</span> <span class="ident">aut_findfos</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">cur</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Cursor</span>::<span class="ident">new</span>(<span class="ident">haystack</span>.<span class="ident">as_bytes</span>()); |
| <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="ident">xs</span>.<span class="ident">to_vec</span>()) |
| .<span class="ident">into_full</span>() |
| .<span class="ident">stream_find_overlapping</span>(<span class="ident">cur</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">r</span><span class="op">|</span> <span class="ident">r</span>.<span class="ident">unwrap</span>()).<span class="ident">collect</span>() |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">one_pattern_one_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"za"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">1</span>, <span class="ident">end</span>: <span class="number">2</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">one_pattern_many_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazazzzza"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">1</span>, <span class="ident">end</span>: <span class="number">2</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">4</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">8</span>, <span class="ident">end</span>: <span class="number">9</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">one_longer_pattern_one_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazabcz"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> } ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">one_longer_pattern_many_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazabczzzzazzzabc"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">14</span>, <span class="ident">end</span>: <span class="number">17</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_pattern_one_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"b"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zb"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">1</span>, <span class="ident">end</span>: <span class="number">2</span> } ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_pattern_many_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"a"</span>, <span class="string">"b"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zbzazzzzb"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">1</span>, <span class="ident">end</span>: <span class="number">2</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">4</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">8</span>, <span class="ident">end</span>: <span class="number">9</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_one_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"xyz"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazxyzz"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> } ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_many_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"xyz"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazxyzzzzzazzzabcxyz"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">14</span>, <span class="ident">end</span>: <span class="number">17</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">17</span>, <span class="ident">end</span>: <span class="number">20</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_find</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_finds</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findf</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfs</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_overlap_one_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"bc"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zazabcz"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">4</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_overlap_one_match_reverse</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"bc"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"xbc"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">1</span>, <span class="ident">end</span>: <span class="number">3</span> } ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_overlap_many_match</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"bc"</span>, <span class="string">"c"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zzzabczzzbczzzc"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">4</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">5</span>, <span class="ident">end</span>: <span class="number">6</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">9</span>, <span class="ident">end</span>: <span class="number">11</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">10</span>, <span class="ident">end</span>: <span class="number">11</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">14</span>, <span class="ident">end</span>: <span class="number">15</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">many_longer_pattern_overlap_many_match_reverse</span>() { |
| <span class="kw">let</span> <span class="ident">ns</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="string">"abc"</span>, <span class="string">"bc"</span>, <span class="string">"c"</span>]; |
| <span class="kw">let</span> <span class="ident">hay</span> <span class="op">=</span> <span class="string">"zzzczzzbczzzabc"</span>; |
| <span class="kw">let</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[ |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">3</span>, <span class="ident">end</span>: <span class="number">4</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">7</span>, <span class="ident">end</span>: <span class="number">9</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">8</span>, <span class="ident">end</span>: <span class="number">9</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">0</span>, <span class="ident">start</span>: <span class="number">12</span>, <span class="ident">end</span>: <span class="number">15</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">1</span>, <span class="ident">start</span>: <span class="number">13</span>, <span class="ident">end</span>: <span class="number">15</span> }, |
| <span class="ident">Match</span> { <span class="ident">pati</span>: <span class="number">2</span>, <span class="ident">start</span>: <span class="number">14</span>, <span class="ident">end</span>: <span class="number">15</span> }, |
| ]; |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfo</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="kw-2">&</span><span class="ident">aut_findfos</span>(<span class="kw-2">&</span><span class="ident">ns</span>, <span class="ident">hay</span>), <span class="kw-2">&</span><span class="ident">matches</span>); |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">pattern_returns_original_type</span>() { |
| <span class="kw">let</span> <span class="ident">aut</span> <span class="op">=</span> <span class="ident">AcAutomaton</span>::<span class="ident">new</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="string">"apple"</span>, <span class="string">"maple"</span>]); |
| |
| <span class="comment">// Explicitly given this type to assert that the thing returned</span> |
| <span class="comment">// from the function is our original type.</span> |
| <span class="kw">let</span> <span class="ident">pat</span>: <span class="kw-2">&</span><span class="ident">str</span> <span class="op">=</span> <span class="ident">aut</span>.<span class="ident">pattern</span>(<span class="number">0</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">pat</span>, <span class="string">"apple"</span>); |
| |
| <span class="comment">// Also check the return type of the `patterns` function.</span> |
| <span class="kw">let</span> <span class="ident">pats</span>: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="ident">str</span>] <span class="op">=</span> <span class="ident">aut</span>.<span class="ident">patterns</span>(); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">pats</span>, <span class="kw-2">&</span>[<span class="string">"apple"</span>, <span class="string">"maple"</span>]); |
| } |
| |
| <span class="comment">// Quickcheck time.</span> |
| |
| <span class="comment">// This generates very small ascii strings, which makes them more likely</span> |
| <span class="comment">// to interact in interesting ways with larger haystack strings.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SmallAscii</span>(<span class="ident">String</span>); |
| |
| <span class="kw">impl</span> <span class="ident">Arbitrary</span> <span class="kw">for</span> <span class="ident">SmallAscii</span> { |
| <span class="kw">fn</span> <span class="ident">arbitrary</span><span class="op"><</span><span class="ident">G</span>: <span class="ident">Gen</span><span class="op">></span>(<span class="ident">g</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">G</span>) <span class="op">-></span> <span class="ident">SmallAscii</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>::<span class="ident">from_u32</span>; |
| <span class="ident">SmallAscii</span>((<span class="number">0</span>..<span class="number">2</span>) |
| .<span class="ident">map</span>(<span class="op">|</span>_<span class="op">|</span> <span class="ident">from_u32</span>(<span class="ident">g</span>.<span class="ident">gen_range</span>(<span class="number">97</span>, <span class="number">123</span>)).<span class="ident">unwrap</span>()) |
| .<span class="ident">collect</span>()) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">shrink</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Box</span><span class="op"><</span><span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">SmallAscii</span><span class="op">>></span> { |
| <span class="ident">Box</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">shrink</span>().<span class="ident">map</span>(<span class="ident">SmallAscii</span>)) |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">SmallAscii</span><span class="op">></span> <span class="kw">for</span> <span class="ident">String</span> { |
| <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">s</span>: <span class="ident">SmallAscii</span>) <span class="op">-></span> <span class="ident">String</span> { <span class="ident">s</span>.<span class="number">0</span> } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">u8</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">SmallAscii</span> { |
| <span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">u8</span>] { <span class="self">self</span>.<span class="number">0</span>.<span class="ident">as_ref</span>() } |
| } |
| |
| <span class="comment">// This is the same arbitrary impl as `String`, except it has a bias toward</span> |
| <span class="comment">// ASCII characters.</span> |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">BiasAscii</span>(<span class="ident">String</span>); |
| |
| <span class="kw">impl</span> <span class="ident">Arbitrary</span> <span class="kw">for</span> <span class="ident">BiasAscii</span> { |
| <span class="kw">fn</span> <span class="ident">arbitrary</span><span class="op"><</span><span class="ident">G</span>: <span class="ident">Gen</span><span class="op">></span>(<span class="ident">g</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">G</span>) <span class="op">-></span> <span class="ident">BiasAscii</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">char</span>::<span class="ident">from_u32</span>; |
| <span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> { <span class="kw">let</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">g</span>.<span class="ident">size</span>(); <span class="ident">g</span>.<span class="ident">gen_range</span>(<span class="number">0</span>, <span class="ident">s</span>) }; |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">s</span> <span class="op">=</span> <span class="ident">String</span>::<span class="ident">with_capacity</span>(<span class="ident">size</span>); |
| <span class="kw">for</span> _ <span class="kw">in</span> <span class="number">0</span>..<span class="ident">size</span> { |
| <span class="kw">if</span> <span class="ident">g</span>.<span class="ident">gen_weighted_bool</span>(<span class="number">3</span>) { |
| <span class="ident">s</span>.<span class="ident">push</span>(<span class="ident">char</span>::<span class="ident">arbitrary</span>(<span class="ident">g</span>)); |
| } <span class="kw">else</span> { |
| <span class="kw">for</span> _ <span class="kw">in</span> <span class="number">0</span>..<span class="number">5</span> { |
| <span class="ident">s</span>.<span class="ident">push</span>(<span class="ident">from_u32</span>(<span class="ident">g</span>.<span class="ident">gen_range</span>(<span class="number">97</span>, <span class="number">123</span>)).<span class="ident">unwrap</span>()); |
| } |
| } |
| } |
| <span class="ident">BiasAscii</span>(<span class="ident">s</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">shrink</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Box</span><span class="op"><</span><span class="ident">Iterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">BiasAscii</span><span class="op">>></span> { |
| <span class="ident">Box</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">shrink</span>().<span class="ident">map</span>(<span class="ident">BiasAscii</span>)) |
| } |
| } |
| |
| <span class="kw">fn</span> <span class="ident">naive_find</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="ident">xs</span>: <span class="kw-2">&</span>[<span class="ident">S</span>], <span class="ident">haystack</span>: <span class="kw-2">&</span><span class="ident">str</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> |
| <span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Into</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">needles</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> <span class="op">=</span> |
| <span class="ident">xs</span>.<span class="ident">to_vec</span>().<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="ident">Into</span>::<span class="ident">into</span>).<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">matches</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[]; |
| <span class="kw">for</span> <span class="ident">hi</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">haystack</span>.<span class="ident">len</span>() { |
| <span class="kw">for</span> (<span class="ident">pati</span>, <span class="ident">needle</span>) <span class="kw">in</span> <span class="ident">needles</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>() { |
| <span class="kw">let</span> <span class="ident">needle</span> <span class="op">=</span> <span class="ident">needle</span>.<span class="ident">as_bytes</span>(); |
| <span class="kw">if</span> <span class="ident">needle</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span> <span class="op">||</span> <span class="ident">needle</span>.<span class="ident">len</span>() <span class="op">></span> <span class="ident">haystack</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">hi</span> { |
| <span class="kw">continue</span>; |
| } |
| <span class="kw">if</span> <span class="ident">needle</span> <span class="op">==</span> <span class="kw-2">&</span><span class="ident">haystack</span>.<span class="ident">as_bytes</span>()[<span class="ident">hi</span>..<span class="ident">hi</span><span class="op">+</span><span class="ident">needle</span>.<span class="ident">len</span>()] { |
| <span class="ident">matches</span>.<span class="ident">push</span>(<span class="ident">Match</span> { |
| <span class="ident">pati</span>: <span class="ident">pati</span>, |
| <span class="ident">start</span>: <span class="ident">hi</span>, |
| <span class="ident">end</span>: <span class="ident">hi</span> <span class="op">+</span> <span class="ident">needle</span>.<span class="ident">len</span>(), |
| }); |
| } |
| } |
| } |
| <span class="ident">matches</span> |
| } |
| |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">qc_ac_equals_naive</span>() { |
| <span class="kw">fn</span> <span class="ident">prop</span>(<span class="ident">needles</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">SmallAscii</span><span class="op">></span>, <span class="ident">haystack</span>: <span class="ident">BiasAscii</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">let</span> <span class="ident">aut_matches</span> <span class="op">=</span> <span class="ident">aut_findo</span>(<span class="kw-2">&</span><span class="ident">needles</span>, <span class="kw-2">&</span><span class="ident">haystack</span>.<span class="number">0</span>); |
| <span class="kw">let</span> <span class="ident">naive_matches</span> <span class="op">=</span> <span class="ident">naive_find</span>(<span class="kw-2">&</span><span class="ident">needles</span>, <span class="kw-2">&</span><span class="ident">haystack</span>.<span class="number">0</span>); |
| <span class="comment">// Ordering isn't always the same. I don't think we care, so do</span> |
| <span class="comment">// an unordered comparison.</span> |
| <span class="kw">let</span> <span class="ident">aset</span>: <span class="ident">HashSet</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> <span class="op">=</span> <span class="ident">aut_matches</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="kw">let</span> <span class="ident">nset</span>: <span class="ident">HashSet</span><span class="op"><</span><span class="ident">Match</span><span class="op">></span> <span class="op">=</span> <span class="ident">naive_matches</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>(); |
| <span class="ident">aset</span> <span class="op">==</span> <span class="ident">nset</span> |
| } |
| <span class="ident">quickcheck</span>(<span class="ident">prop</span> <span class="kw">as</span> <span class="kw">fn</span>(<span class="ident">Vec</span><span class="op"><</span><span class="ident">SmallAscii</span><span class="op">></span>, <span class="ident">BiasAscii</span>) <span class="op">-></span> <span class="ident">bool</span>); |
| } |
| } |
| </pre> |
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