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<div class="title">sample23.cpp</div> </div>
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<p>Example on intervals enumarator.BitMagic <a class="el" href="classbm_1_1bvector.html">bvector<></a> implements high performance operation on RLE coded bit-vectors, transparently supporting all logical operations like intersections.Serialization uses compressive encoding (binary interpolative codes) to efficiently store collections of intervals.</p>
<p>This example illustrates use of inetrval_enumerator<> to interpret bit-vector as a sequence of 011110 ranges/intervals.</p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae" title="Sets all bits in the specified closed interval [left,right] Interval must be inside the bvector's siz...">bm::bvector::set_range</a> </dd>
<dd>
<a class="el" href="classbm_1_1interval__enumerator.html" title="forward iterator class to traverse bit-vector as ranges">bm::interval_enumerator</a></dd>
<dd>
<a class="el" href="sample22_8cpp.html" title="Example: bvector<> - ranges and intervals functions.">sample22.cpp</a> </dd>
<dd>
<a class="el" href="group__bvintervals.html" title="Algorithms and iterators for bit ranges and intervals.">Algorithms for bit intervals</a></dd></dl>
<div class="fragment"><div class="line"><span class="comment">/*</span></div>
<div class="line"><span class="comment">Copyright(c) 2002-2017 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment">Licensed under the Apache License, Version 2.0 (the "License");</span></div>
<div class="line"><span class="comment">you may not use this file except in compliance with the License.</span></div>
<div class="line"><span class="comment">You may obtain a copy of the License at</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment"> http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment">Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><span class="comment">distributed under the License is distributed on an "AS IS" BASIS,</span></div>
<div class="line"><span class="comment">WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><span class="comment">See the License for the specific language governing permissions and</span></div>
<div class="line"><span class="comment">limitations under the License.</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment">For more information please visit: http://bitmagic.io</span></div>
<div class="line"><span class="comment">*/</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment">/** \example sample23.cpp</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment"> Example on intervals enumarator.</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment"> BitMagic bvector<> implements high performance operation on RLE</span></div>
<div class="line"><span class="comment"> coded bit-vectors, transparently supporting all logical operations</span></div>
<div class="line"><span class="comment"> like intersections.Serialization uses compressive encoding</span></div>
<div class="line"><span class="comment"> (binary interpolative codes) to efficiently store collections </span></div>
<div class="line"><span class="comment"> of intervals.</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment"> This example illustrates use of inetrval_enumerator<> to interpret</span></div>
<div class="line"><span class="comment"> bit-vector as a sequence of 011110 ranges/intervals.</span></div>
<div class="line"><span class="comment"> </span></div>
<div class="line"><span class="comment"> \sa bm::bvector::set_range</span></div>
<div class="line"><span class="comment"> \sa bm::interval_enumerator</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment"> \sa sample22.cpp</span></div>
<div class="line"><span class="comment"> \sa bvintervals</span></div>
<div class="line"><span class="comment">*/</span></div>
<div class="line"><span class="comment"></span> </div>
<div class="line"><span class="comment">/*! \file sample23.cpp</span></div>
<div class="line"><span class="comment"> \brief Example: interval_enumerator<> - interator class for intervals</span></div>
<div class="line"><span class="comment">*/</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include <iostream></span></div>
<div class="line"><span class="preprocessor">#include <assert.h></span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="bm_8h.html">bm.h</a>"</span></div>
<div class="line"><span class="preprocessor">#include "<a class="code" href="bmintervals_8h.html">bmintervals.h</a>"</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">using namespace </span>std;</div>
<div class="line"> </div>
<div class="line"><span class="keyword">typedef</span> <a name="_a0"></a><a class="code" href="classbm_1_1interval__enumerator.html">bm::interval_enumerator<bm::bvector<></a> > <a name="a1"></a><a class="code" href="sample23_8cpp.html#a4818975b7767c5d423cbc0f181261cf4">interval_enumerator_type</a>;</div>
<div class="line"> </div>
<div class="line"><span class="keywordtype">int</span> <a name="a2"></a><a class="code" href="sample23_8cpp.html#a840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line"> <span class="keywordflow">try</span></div>
<div class="line"> { </div>
<div class="line"> <a name="_a3"></a><a class="code" href="classbm_1_1bvector.html">bm::bvector<></a> bv(<a name="a4"></a><a class="code" href="group__bvector.html#ggad0b87b3b7292383a864d27feaf1c9effa7fe09d1d7c62a813db922c396c0cbc9c">bm::BM_GAP</a>); <span class="comment">// use RLE compressed vector from the start</span></div>
<div class="line"> </div>
<div class="line"> bv.<a name="a5"></a><a class="code" href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae">set_range</a>(10, 10);</div>
<div class="line"> bv.<a class="code" href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae">set_range</a>(100, 110); <span class="comment">// sets a range of 1s [100, 110] .....11111....</span></div>
<div class="line"> bv.<a class="code" href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae">set_range</a>(777, 888);</div>
<div class="line"> bv.<a class="code" href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae">set_range</a>(65536, 65536);</div>
<div class="line"> </div>
<div class="line"> bv.<a name="a6"></a><a class="code" href="classbm_1_1bvector.html#a622e6827d799a561e2f0db28f7ac19d2">optimize</a>(); </div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <a class="code" href="classbm_1_1interval__enumerator.html">interval_enumerator_type</a> ien(bv);</div>
<div class="line"> <span class="keywordflow">if</span> (ien.<a name="a7"></a><a class="code" href="classbm_1_1interval__enumerator.html#a2dc3006cac5c4cb7b8335fb4f0d394a7">valid</a>())</div>
<div class="line"> {</div>
<div class="line"> <span class="keywordflow">do</span></div>
<div class="line"> { </div>
<div class="line"> cout << <span class="stringliteral">"["</span> << ien.<a name="a8"></a><a class="code" href="classbm_1_1interval__enumerator.html#a72052c8379821a2881a9a197ff1dda26">start</a>() << <span class="stringliteral">".."</span> << ien.<a name="a9"></a><a class="code" href="classbm_1_1interval__enumerator.html#a297e6319b0e330c2091290455e2011b4">end</a>() << <span class="stringliteral">"]"</span>;</div>
<div class="line"> } <span class="keywordflow">while</span> (ien.<a name="a10"></a><a class="code" href="classbm_1_1interval__enumerator.html#a5ab7389bfaea9806839b9b6a5e3eb9b0">advance</a>());</div>
<div class="line"> cout << endl;</div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// case 2: slightly less efficient, but more STL iterator conformant </span></div>
<div class="line"> <span class="comment">// </span></div>
<div class="line"> {</div>
<div class="line"> <a class="code" href="classbm_1_1interval__enumerator.html">interval_enumerator_type</a> ien(bv);</div>
<div class="line"> <a class="code" href="classbm_1_1interval__enumerator.html">interval_enumerator_type</a> ien_end;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// please note prefix increment "++en" is way more efficient </span></div>
<div class="line"> <span class="comment">// than possible postfix notation of "ien++" (no temp.copy)</span></div>
<div class="line"> <span class="comment">//</span></div>
<div class="line"> <span class="keywordflow">for</span> (; ien != ien_end; ++ien)</div>
<div class="line"> {</div>
<div class="line"> <span class="comment">// also uses pair notation to represent interval</span></div>
<div class="line"> cout << <span class="stringliteral">"["</span> << (*ien).first << <span class="stringliteral">".."</span> << (*ien).second << <span class="stringliteral">"]"</span>;</div>
<div class="line"> }</div>
<div class="line"> cout << endl;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line"> {</div>
<div class="line"> <span class="comment">// construct enumerator to start from position 102 and </span></div>
<div class="line"> <span class="comment">// extend start (to 100)</span></div>
<div class="line"> <a class="code" href="classbm_1_1interval__enumerator.html">interval_enumerator_type</a> ien(bv, 102, <span class="keyword">true</span>);</div>
<div class="line"> <a class="code" href="classbm_1_1interval__enumerator.html">interval_enumerator_type</a> ien_end;</div>
<div class="line"> <span class="keywordflow">for</span> (; ien != ien_end; ++ien)</div>
<div class="line"> {</div>
<div class="line"> cout << <span class="stringliteral">"["</span> << ien.<a name="a11"></a><a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a name="a12"></a><a class="code" href="structbm_1_1pair.html#a1e912e83b182e975377493e015f42917">first</a> << <span class="stringliteral">".."</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a name="a13"></a><a class="code" href="structbm_1_1pair.html#a02c92339595767324e1fe5cac311343b">second</a> << <span class="stringliteral">"]"</span>;</div>
<div class="line"> }</div>
<div class="line"> cout << endl;</div>
<div class="line"> </div>
<div class="line"> ien.<a name="a14"></a><a class="code" href="classbm_1_1interval__enumerator.html#afeae87a518d408f42a079b4e2796baad">go_to</a>(105, <span class="keyword">false</span>); <span class="comment">// now re-position enumerator to position 105 without extend start</span></div>
<div class="line"> <span class="keywordflow">for</span> (; ien != ien_end; ++ien)</div>
<div class="line"> {</div>
<div class="line"> cout << <span class="stringliteral">"["</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a1e912e83b182e975377493e015f42917">first</a> << <span class="stringliteral">".."</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a02c92339595767324e1fe5cac311343b">second</a> << <span class="stringliteral">"]"</span>;</div>
<div class="line"> }</div>
<div class="line"> cout << endl;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// now re-position enumerator to position 105 without extend start</span></div>
<div class="line"> ien.<a class="code" href="classbm_1_1interval__enumerator.html#afeae87a518d408f42a079b4e2796baad">go_to</a>(105, <span class="keyword">false</span>); </div>
<div class="line"> <span class="keywordflow">for</span> (; ien != ien_end; ++ien)</div>
<div class="line"> {</div>
<div class="line"> cout << <span class="stringliteral">"["</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a1e912e83b182e975377493e015f42917">first</a> << <span class="stringliteral">".."</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a02c92339595767324e1fe5cac311343b">second</a> << <span class="stringliteral">"]"</span>;</div>
<div class="line"> }</div>
<div class="line"> cout << endl;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// now re-position enumerator to position 115 wit extend start</span></div>
<div class="line"> <span class="comment">// target position is not in the interval, so it should find the</span></div>
<div class="line"> <span class="comment">// next available one automatically</span></div>
<div class="line"> <span class="comment">//</span></div>
<div class="line"> ien.<a class="code" href="classbm_1_1interval__enumerator.html#afeae87a518d408f42a079b4e2796baad">go_to</a>(115, <span class="keyword">true</span>); <span class="comment">// extend_left=true but it should not matter</span></div>
<div class="line"> <span class="keywordflow">for</span> (; ien != ien_end; ++ien)</div>
<div class="line"> {</div>
<div class="line"> cout << <span class="stringliteral">"["</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a1e912e83b182e975377493e015f42917">first</a> << <span class="stringliteral">".."</span> << ien.<a class="code" href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">get</a>().<a class="code" href="structbm_1_1pair.html#a02c92339595767324e1fe5cac311343b">second</a> << <span class="stringliteral">"]"</span>;</div>
<div class="line"> }</div>
<div class="line"> cout << endl;</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// go beyond end</span></div>
<div class="line"> ien.<a class="code" href="classbm_1_1interval__enumerator.html#afeae87a518d408f42a079b4e2796baad">go_to</a>(1150000, <span class="keyword">true</span>);</div>
<div class="line"> <span class="keywordflow">if</span> (ien.<a class="code" href="classbm_1_1interval__enumerator.html#a2dc3006cac5c4cb7b8335fb4f0d394a7">valid</a>())</div>
<div class="line"> {</div>
<div class="line"> assert(0);</div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">else</span></div>
<div class="line"> {</div>
<div class="line"> cout << <span class="stringliteral">"EMPTY"</span> << endl; </div>
<div class="line"> }</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> }</div>
<div class="line"> <span class="keywordflow">catch</span>(std::exception& ex)</div>
<div class="line"> {</div>
<div class="line"> std::cerr << ex.what() << std::endl;</div>
<div class="line"> <span class="keywordflow">return</span> 1;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
</div><!-- fragment --> </div><!-- contents -->
<div class="ttc" id="aclassbm_1_1bvector_html_aafb2ecaa1a55856533e6b4afbf788eae"><div class="ttname"><a href="classbm_1_1bvector.html#aafb2ecaa1a55856533e6b4afbf788eae">bm::bvector::set_range</a></div><div class="ttdeci">bvector< Alloc > & set_range(size_type left, size_type right, bool value=true)</div><div class="ttdoc">Sets all bits in the specified closed interval [left,right] Interval must be inside the bvector's siz...</div><div class="ttdef"><b>Definition:</b> <a href="bm_8h_source.html#l02158">bm.h:2158</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_afeae87a518d408f42a079b4e2796baad"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#afeae87a518d408f42a079b4e2796baad">bm::interval_enumerator::go_to</a></div><div class="ttdeci">bool go_to(size_type pos, bool extend_start=true)</div><div class="ttdoc">Go to inetrval at specified position Jump to position with interval. If interval is not available at ...</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00584">bmintervals.h:584</a></div></div>
<div class="ttc" id="astructbm_1_1pair_html_a1e912e83b182e975377493e015f42917"><div class="ttname"><a href="structbm_1_1pair.html#a1e912e83b182e975377493e015f42917">bm::pair::first</a></div><div class="ttdeci">First first</div><div class="ttdef"><b>Definition:</b> <a href="bmfunc_8h_source.html#l00123">bmfunc.h:123</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_a297e6319b0e330c2091290455e2011b4"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#a297e6319b0e330c2091290455e2011b4">bm::interval_enumerator::end</a></div><div class="ttdeci">size_type end() const BMNOEXCEPT</div><div class="ttdoc">Return interval end/right as bit-vector coordinate 011110 [left..right].</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00560">bmintervals.h:560</a></div></div>
<div class="ttc" id="aclassbm_1_1bvector_html"><div class="ttname"><a href="classbm_1_1bvector.html">bm::bvector<></a></div></div>
<div class="ttc" id="asample23_8cpp_html_a4818975b7767c5d423cbc0f181261cf4"><div class="ttname"><a href="sample23_8cpp.html#a4818975b7767c5d423cbc0f181261cf4">interval_enumerator_type</a></div><div class="ttdeci">bm::interval_enumerator< bm::bvector<> > interval_enumerator_type</div><div class="ttdef"><b>Definition:</b> <a href="sample23_8cpp_source.html#l00051">sample23.cpp:51</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_a72052c8379821a2881a9a197ff1dda26"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#a72052c8379821a2881a9a197ff1dda26">bm::interval_enumerator::start</a></div><div class="ttdeci">size_type start() const BMNOEXCEPT</div><div class="ttdoc">Return interval start/left as bit-vector coordinate 011110 [left..right].</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00551">bmintervals.h:551</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_a5ab7389bfaea9806839b9b6a5e3eb9b0"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#a5ab7389bfaea9806839b9b6a5e3eb9b0">bm::interval_enumerator::advance</a></div><div class="ttdeci">bool advance()</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00717">bmintervals.h:717</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_a3ea1781d0fc2f22b6e6c817e9c504a6d"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#a3ea1781d0fc2f22b6e6c817e9c504a6d">bm::interval_enumerator::get</a></div><div class="ttdeci">const pair_type & get() const BMNOEXCEPT</div><div class="ttdoc">Get interval pair.</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00161">bmintervals.h:161</a></div></div>
<div class="ttc" id="agroup__bvector_html_ggad0b87b3b7292383a864d27feaf1c9effa7fe09d1d7c62a813db922c396c0cbc9c"><div class="ttname"><a href="group__bvector.html#ggad0b87b3b7292383a864d27feaf1c9effa7fe09d1d7c62a813db922c396c0cbc9c">bm::BM_GAP</a></div><div class="ttdeci">@ BM_GAP</div><div class="ttdoc">GAP compression is ON.</div><div class="ttdef"><b>Definition:</b> <a href="bmconst_8h_source.html#l00144">bmconst.h:144</a></div></div>
<div class="ttc" id="abmintervals_8h_html"><div class="ttname"><a href="bmintervals_8h.html">bmintervals.h</a></div><div class="ttdoc">Algorithms for bit ranges and intervals.</div></div>
<div class="ttc" id="astructbm_1_1pair_html_a02c92339595767324e1fe5cac311343b"><div class="ttname"><a href="structbm_1_1pair.html#a02c92339595767324e1fe5cac311343b">bm::pair::second</a></div><div class="ttdeci">Second second</div><div class="ttdef"><b>Definition:</b> <a href="bmfunc_8h_source.html#l00124">bmfunc.h:124</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html_a2dc3006cac5c4cb7b8335fb4f0d394a7"><div class="ttname"><a href="classbm_1_1interval__enumerator.html#a2dc3006cac5c4cb7b8335fb4f0d394a7">bm::interval_enumerator::valid</a></div><div class="ttdeci">bool valid() const BMNOEXCEPT</div><div class="ttdoc">Returns true if enumerator is valid (false if traversal is done)</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00568">bmintervals.h:568</a></div></div>
<div class="ttc" id="aclassbm_1_1interval__enumerator_html"><div class="ttname"><a href="classbm_1_1interval__enumerator.html">bm::interval_enumerator</a></div><div class="ttdoc">forward iterator class to traverse bit-vector as ranges</div><div class="ttdef"><b>Definition:</b> <a href="bmintervals_8h_source.html#l00052">bmintervals.h:52</a></div></div>
<div class="ttc" id="abm_8h_html"><div class="ttname"><a href="bm_8h.html">bm.h</a></div><div class="ttdoc">Compressed bit-vector bvector<> container, set algebraic methods, traversal iterators.</div></div>
<div class="ttc" id="asample23_8cpp_html_a840291bc02cba5474a4cb46a9b9566fe"><div class="ttname"><a href="sample23_8cpp.html#a840291bc02cba5474a4cb46a9b9566fe">main</a></div><div class="ttdeci">int main(void)</div><div class="ttdef"><b>Definition:</b> <a href="sample23_8cpp_source.html#l00053">sample23.cpp:53</a></div></div>
<div class="ttc" id="aclassbm_1_1bvector_html_a622e6827d799a561e2f0db28f7ac19d2"><div class="ttname"><a href="classbm_1_1bvector.html#a622e6827d799a561e2f0db28f7ac19d2">bm::bvector::optimize</a></div><div class="ttdeci">void optimize(bm::word_t *temp_block=0, optmode opt_mode=opt_compress, statistics *stat=0)</div><div class="ttdoc">Optimize memory bitvector's memory allocation.</div><div class="ttdef"><b>Definition:</b> <a href="bm_8h_source.html#l03071">bm.h:3071</a></div></div>
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