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| 4 | <title>Overlap counter</title> | |
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| 24 | </div> | |
| 25 | <div class="section boost_icl_examples_overlap_counter" lang="en"> | |
| 26 | <div class="titlepage"><div><div><h3 class="title"> | |
| 27 | <a name="boost_icl.examples.overlap_counter"></a><a class="link" href="overlap_counter.html" title="Overlap counter">Overlap counter</a> | |
| 28 | </h3></div></div></div> | |
| 29 | <p> | |
| 30 | Example <span class="bold"><strong>overlap counter</strong></span> provides the simplest | |
| 31 | application of an interval_map that maps intervals to integers. An interval_map<int,int> | |
| 32 | serves as an overlap counter if we only add interval value pairs that carry | |
| 33 | 1 as associated value. | |
| 34 | </p> | |
| 35 | <p> | |
| 36 | Doing so, the associated values that are accumulated in the interval_map | |
| 37 | are just the number of overlaps of all added intervals. | |
| 38 | </p> | |
| 39 | <p> | |
| 40 | </p> | |
| 41 | <p> | |
| 42 | ||
| 43 | </p> | |
| 44 | <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> | |
| 45 | <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">split_interval_map</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> | |
| 46 | ||
| 47 | <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span> | |
| 48 | <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">icl</span><span class="special">;</span> | |
| 49 | ||
| 50 | ||
| 51 | <span class="comment">/* The most simple example of an interval_map is an overlap counter. | |
| 52 | If intervals are added that are associated with the value 1, | |
| 53 | all overlaps of added intervals are counted as a result in the | |
| 54 | associated values. | |
| 55 | */</span> | |
| 56 | <span class="keyword">typedef</span> <span class="identifier">interval_map</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">int</span><span class="special">></span> <span class="identifier">OverlapCounterT</span><span class="special">;</span> | |
| 57 | ||
| 58 | <span class="keyword">void</span> <span class="identifier">print_overlaps</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">OverlapCounterT</span><span class="special">&</span> <span class="identifier">counter</span><span class="special">)</span> | |
| 59 | <span class="special">{</span> | |
| 60 | <span class="keyword">for</span><span class="special">(</span><span class="identifier">OverlapCounterT</span><span class="special">::</span><span class="identifier">const_iterator</span> <span class="identifier">it</span> <span class="special">=</span> <span class="identifier">counter</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> <span class="identifier">it</span> <span class="special">!=</span> <span class="identifier">counter</span><span class="special">.</span><span class="identifier">end</span><span class="special">();</span> <span class="identifier">it</span><span class="special">++)</span> | |
| 61 | <span class="special">{</span> | |
| 62 | <span class="identifier">discrete_interval</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">itv</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">it</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span> | |
| 63 | <span class="keyword">int</span> <span class="identifier">overlaps_count</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">it</span><span class="special">).</span><span class="identifier">second</span><span class="special">;</span> | |
| 64 | <span class="keyword">if</span><span class="special">(</span><span class="identifier">overlaps_count</span> <span class="special">==</span> <span class="number">1</span><span class="special">)</span> | |
| 65 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"in interval "</span> <span class="special"><<</span> <span class="identifier">itv</span> <span class="special"><<</span> <span class="string">" intervals do not overlap"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 66 | <span class="keyword">else</span> | |
| 67 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"in interval "</span> <span class="special"><<</span> <span class="identifier">itv</span> <span class="special"><<</span> <span class="string">": "</span><span class="special"><<</span> <span class="identifier">overlaps_count</span> <span class="special"><<</span> <span class="string">" intervals overlap"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 68 | <span class="special">}</span> | |
| 69 | <span class="special">}</span> | |
| 70 | ||
| 71 | <span class="keyword">void</span> <span class="identifier">overlap_counter</span><span class="special">()</span> | |
| 72 | <span class="special">{</span> | |
| 73 | <span class="identifier">OverlapCounterT</span> <span class="identifier">overlap_counter</span><span class="special">;</span> | |
| 74 | <span class="identifier">discrete_interval</span><span class="special"><</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">inter_val</span><span class="special">;</span> | |
| 75 | ||
| 76 | <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">4</span><span class="special">,</span><span class="number">8</span><span class="special">);</span> | |
| 77 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-- adding "</span> <span class="special"><<</span> <span class="identifier">inter_val</span> <span class="special"><<</span> <span class="string">" -----------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 78 | <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> | |
| 79 | <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span> | |
| 80 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 81 | ||
| 82 | <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">6</span><span class="special">,</span><span class="number">9</span><span class="special">);</span> | |
| 83 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-- adding "</span> <span class="special"><<</span> <span class="identifier">inter_val</span> <span class="special"><<</span> <span class="string">" -----------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 84 | <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> | |
| 85 | <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span> | |
| 86 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 87 | ||
| 88 | <span class="identifier">inter_val</span> <span class="special">=</span> <span class="identifier">discrete_interval</span><span class="special"><</span><span class="keyword">int</span><span class="special">>::</span><span class="identifier">right_open</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">9</span><span class="special">);</span> | |
| 89 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-- adding "</span> <span class="special"><<</span> <span class="identifier">inter_val</span> <span class="special"><<</span> <span class="string">" -----------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 90 | <span class="identifier">overlap_counter</span> <span class="special">+=</span> <span class="identifier">make_pair</span><span class="special">(</span><span class="identifier">inter_val</span><span class="special">,</span> <span class="number">1</span><span class="special">);</span> | |
| 91 | <span class="identifier">print_overlaps</span><span class="special">(</span><span class="identifier">overlap_counter</span><span class="special">);</span> | |
| 92 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-----------------------------------------------------------"</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> | |
| 93 | ||
| 94 | <span class="special">}</span> | |
| 95 | ||
| 96 | <span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> | |
| 97 | <span class="special">{</span> | |
| 98 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">">>Interval Container Library: Sample overlap_counter.cpp <<\n"</span><span class="special">;</span> | |
| 99 | <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-----------------------------------------------------------\n"</span><span class="special">;</span> | |
| 100 | <span class="identifier">overlap_counter</span><span class="special">();</span> | |
| 101 | <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> | |
| 102 | <span class="special">}</span> | |
| 103 | ||
| 104 | <span class="comment">// Program output: | |
| 105 | </span> | |
| 106 | <span class="comment">// >>Interval Container Library: Sample overlap_counter.cpp << | |
| 107 | </span><span class="comment">// ----------------------------------------------------------- | |
| 108 | </span><span class="comment">// -- adding [4,8) ----------------------------------------- | |
| 109 | </span><span class="comment">// in interval [4,8) intervals do not overlap | |
| 110 | </span><span class="comment">// ----------------------------------------------------------- | |
| 111 | </span><span class="comment">// -- adding [6,9) ----------------------------------------- | |
| 112 | </span><span class="comment">// in interval [4,6) intervals do not overlap | |
| 113 | </span><span class="comment">// in interval [6,8): 2 intervals overlap | |
| 114 | </span><span class="comment">// in interval [8,9) intervals do not overlap | |
| 115 | </span><span class="comment">// ----------------------------------------------------------- | |
| 116 | </span><span class="comment">// -- adding [1,9) ----------------------------------------- | |
| 117 | </span><span class="comment">// in interval [1,4) intervals do not overlap | |
| 118 | </span><span class="comment">// in interval [4,6): 2 intervals overlap | |
| 119 | </span><span class="comment">// in interval [6,8): 3 intervals overlap | |
| 120 | </span><span class="comment">// in interval [8,9): 2 intervals overlap | |
| 121 | </span><span class="comment">// ----------------------------------------------------------- | |
| 122 | </span></pre> | |
| 123 | <p> | |
| 124 | </p> | |
| 125 | <p> | |
| 126 | </p> | |
| 127 | </div> | |
| 128 | <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> | |
| 129 | <td align="left"></td> | |
| 130 | <td align="right"><div class="copyright-footer">Copyright © 2007 -2010 Joachim Faulhaber<br>Copyright © 1999 -2006 Cortex Software GmbH<p> | |
| 131 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 132 | file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) | |
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