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| 93 | + <div class="headertitle"><div class="title">wildcards.hpp</div></div> |
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| 95 | +<div class="contents"> |
| 96 | +<a href="../../d1/d00/wildcards_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="preprocessor">#</span><span class="preprocessor">pragma</span> <span class="preprocessor">once</span></div> |
| 97 | +<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span> </div> |
| 98 | +<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">/**</span></div> |
| 99 | +<div class="line"><span class="lineno"> 4</span><span class="comment"> * @file wildcards.hpp</span></div> |
| 100 | +<div class="line"><span class="lineno"> 5</span><span class="comment"> * @brief Simple wildcard matching function supporting '*' and '?'.</span></div> |
| 101 | +<div class="line"><span class="lineno"> 6</span><span class="comment"> *</span></div> |
| 102 | +<div class="line"><span class="lineno"> 7</span><span class="comment"> * This file provides a function to match strings against patterns containing</span></div> |
| 103 | +<div class="line"><span class="lineno"> 8</span><span class="comment"> * wildcard characters:</span></div> |
| 104 | +<div class="line"><span class="lineno"> 9</span><span class="comment"> * - '*' matches any sequence of characters (including the empty sequence)</span></div> |
| 105 | +<div class="line"><span class="lineno"> 10</span><span class="comment"> * - '?' matches any single character</span></div> |
| 106 | +<div class="line"><span class="lineno"> 11</span><span class="comment"> *</span></div> |
| 107 | +<div class="line"><span class="lineno"> 12</span><span class="comment"> * The implementation uses recursion with memoization to efficiently handle</span></div> |
| 108 | +<div class="line"><span class="lineno"> 13</span><span class="comment"> * overlapping subproblems.</span></div> |
| 109 | +<div class="line"><span class="lineno"> 14</span><span class="comment"> */</span></div> |
| 110 | +<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div> |
| 111 | +<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">inline</span> <span class="keywordtype">bool</span> wildcards_match(std::string_view str, std::string_view pattern)</div> |
| 112 | +<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span>{</div> |
| 113 | +<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">const</span> size_t n = str.size();</div> |
| 114 | +<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">const</span> size_t m = pattern.size();</div> |
| 115 | +<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> </div> |
| 116 | +<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// Pre-allocate memo table: -1 = not computed, 0 = false, 1 = true</span></div> |
| 117 | +<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> std::vector<int8_t> memo((n + 1) * (m + 1), -1);</div> |
| 118 | +<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div> |
| 119 | +<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">auto</span> get_memo = [&](size_t i, size_t j) -> int8_t& { <span class="keywordflow">return</span> memo[i * (m + 1) + j]; };</div> |
| 120 | +<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div> |
| 121 | +<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">auto</span> match = [&](<span class="keyword">auto</span>& match_ref, size_t i, size_t j) -> <span class="keywordtype">bool</span> {</div> |
| 122 | +<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> <span class="keywordflow">if</span>(j == m)</div> |
| 123 | +<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> {</div> |
| 124 | +<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> <span class="keywordflow">return</span> i == n;</div> |
| 125 | +<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> }</div> |
| 126 | +<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div> |
| 127 | +<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> int8_t& cached = get_memo(i, j);</div> |
| 128 | +<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">if</span>(cached != -1)</div> |
| 129 | +<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> {</div> |
| 130 | +<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keywordflow">return</span> cached == 1;</div> |
| 131 | +<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> }</div> |
| 132 | +<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> </div> |
| 133 | +<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> <span class="keywordtype">bool</span> result;</div> |
| 134 | +<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> <span class="keywordflow">if</span>(pattern[j] == <span class="stringliteral">'*'</span>)</div> |
| 135 | +<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> {</div> |
| 136 | +<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> result = match_ref(match_ref, i, j + 1);</div> |
| 137 | +<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">if</span>(!result && i < n)</div> |
| 138 | +<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> {</div> |
| 139 | +<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> result = match_ref(match_ref, i + 1, j);</div> |
| 140 | +<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> }</div> |
| 141 | +<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> }</div> |
| 142 | +<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(i < n && (pattern[j] == <span class="stringliteral">'?'</span> || pattern[j] == str[i]))</div> |
| 143 | +<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> {</div> |
| 144 | +<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> result = match_ref(match_ref, i + 1, j + 1);</div> |
| 145 | +<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> }</div> |
| 146 | +<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">else</span></div> |
| 147 | +<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> {</div> |
| 148 | +<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> result = <span class="keyword">false</span>;</div> |
| 149 | +<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div> |
| 150 | +<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div> |
| 151 | +<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> cached = result ? 1 : 0;</div> |
| 152 | +<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">return</span> result;</div> |
| 153 | +<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> };</div> |
| 154 | +<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> </div> |
| 155 | +<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">return</span> match(match, 0, 0);</div> |
| 156 | +<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span>}</div> |
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