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<li class="navelem"><a class="el" href="dir_df9c78dcf3f59a33b12284f95992a64b.html">ripple</a></li><li class="navelem"><a class="el" href="dir_5f536ab1985a8dcd28bcfd618bc58e92.html">basics</a></li> </ul>
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<div class="title">MathUtilities.h</div> </div>
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//------------------------------------------------------------------------------</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> Copyright (c) 2020 Ripple Labs Inc.</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"></span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">*/</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">//==============================================================================</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>  </div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#ifndef RIPPLE_BASICS_MATHUTILITIES_H_INCLUDED</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#define RIPPLE_BASICS_MATHUTILITIES_H_INCLUDED</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a>></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a>></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cstddef.html">cstddef</a>></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  </div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> constexpr <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div>
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<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628"> 44</a></span> <a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(<a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> count, <a class="codeRef" href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a> total)</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  assert(total != 0);</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordflow">return</span> ((<a class="codeRef" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(count, total) * 100) + total - 1) / total;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> }</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">// unit tests</span></div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(1, 2) == 50);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(0, 100) == 0);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(100, 100) == 100);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(200, 100) == 100);</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(1, 100) == 1);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(1, 99) == 2);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(6, 14) == 43);</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(29, 33) == 88);</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(1, 64) == 2);</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(0, 100<span class="stringliteral">'000'</span>000) == 0);</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(1, 100<span class="stringliteral">'000'</span>000) == 1);</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(50<span class="stringliteral">'000'</span>000, 100<span class="stringliteral">'000'</span>000) == 50);</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(50<span class="stringliteral">'000'</span>001, 100<span class="stringliteral">'000'</span>000) == 51);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> static_assert(<a class="code" href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">calculatePercent</a>(99<span class="stringliteral">'999'</span>999, 100<span class="stringliteral">'000'</span>000) == 100);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  </div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> } <span class="comment">// namespace ripple</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="aalgorithm_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/algorithm.html">algorithm</a></div></div>
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<div class="ttc" id="acstddef_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cstddef.html">cstddef</a></div></div>
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<div class="ttc" id="anamespaceripple_html_a80033fe071280d537dbd79e19ba5b628"><div class="ttname"><a href="namespaceripple.html#a80033fe071280d537dbd79e19ba5b628">ripple::calculatePercent</a></div><div class="ttdeci">constexpr std::size_t calculatePercent(std::size_t count, std::size_t total)</div><div class="ttdoc">Calculate one number divided by another number in percentage.</div><div class="ttdef"><b>Definition:</b> <a href="MathUtilities_8h_source.html#l00044">MathUtilities.h:44</a></div></div>
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<div class="ttc" id="amin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a></div><div class="ttdeci">T min(T... args)</div></div>
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<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition:</b> <a href="RCLCensorshipDetector_8h_source.html#l00029">RCLCensorshipDetector.h:29</a></div></div>
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<div class="ttc" id="acassert_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cassert.html">cassert</a></div></div>
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<div class="ttc" id="asize_t_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/types/size_t.html">std::size_t</a></div></div>
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