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class="header"> <div class="headertitle"> <div class="title">DoubleBits.h</div> </div> </div><!--header--> <div class="contents"> <div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/**********************************************************************</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> *</span></div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * GEOS - Geometry Engine Open Source</span></div> <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * http://geos.osgeo.org</span></div> <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div> <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * Copyright (C) 2006 Refractions Research Inc.</span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> *</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * This is free software; you can redistribute and/or modify it under</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * the terms of the GNU Lesser General Public Licence as published</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * by the Free Software Foundation. </span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * See the COPYING file for more information.</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> **********************************************************************</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Last port: index/quadtree/DoubleBits.java rev. 1.7 (JTS-1.10)</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> **********************************************************************/</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#ifndef GEOS_IDX_QUADTREE_DOUBLEBITS_H</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor"></span><span class="preprocessor">#define GEOS_IDX_QUADTREE_DOUBLEBITS_H</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <geos/export.h></span></div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <geos/platform.h></span> <span class="comment">// for int64</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <string></span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span>geos {</div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">namespace </span>index { <span class="comment">// geos::index</span></div> <div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="namespacegeos_1_1index_1_1quadtree.html"> 29</a></span> <span class="keyword">namespace </span>quadtree { <span class="comment">// geos::index::quadtree</span></div> <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div> <div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classgeos_1_1index_1_1quadtree_1_1DoubleBits.html"> 44</a></span> <span class="keyword">class </span>GEOS_DLL <a class="code" href="classgeos_1_1index_1_1quadtree_1_1DoubleBits.html">DoubleBits</a> {</div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="keyword">public</span>:</div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> EXPONENT_BIAS=1023;</div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> powerOf2(<span class="keywordtype">int</span> exp);</div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> exponent(<span class="keywordtype">double</span> d);</div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div> <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> truncateToPowerOfTwo(<span class="keywordtype">double</span> d);</div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div> <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">static</span> std::string toBinaryString(<span class="keywordtype">double</span> d);</div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> maximumCommonMantissa(<span class="keywordtype">double</span> d1, <span class="keywordtype">double</span> d2);</div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="classgeos_1_1index_1_1quadtree_1_1DoubleBits.html">DoubleBits</a>(<span class="keywordtype">double</span> nx);</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span> </div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">double</span> getDouble() <span class="keyword">const</span>;</div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  int64 biasedExponent() <span class="keyword">const</span>;</div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> getExponent() <span class="keyword">const</span>;</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">void</span> zeroLowerBits(<span class="keywordtype">int</span> nBits);</div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> </div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">int</span> getBit(<span class="keywordtype">int</span> i) <span class="keyword">const</span>;</div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div> <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordtype">int</span> numCommonMantissaBits(<span class="keyword">const</span> <a class="code" href="classgeos_1_1index_1_1quadtree_1_1DoubleBits.html">DoubleBits</a>& db) <span class="keyword">const</span>;</div> <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  std::string toString() <span class="keyword">const</span>;</div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword">private</span>:</div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordtype">double</span> x;</div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  int64 xBits;</div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> };</div> <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> } <span class="comment">// namespace geos::index::quadtree</span></div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> } <span class="comment">// namespace geos::index</span></div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> } <span class="comment">// namespace geos</span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#endif // GEOS_IDX_QUADTREE_DOUBLEBITS_H</span></div> <div class="ttc" id="classgeos_1_1index_1_1quadtree_1_1DoubleBits_html"><div class="ttname"><a href="classgeos_1_1index_1_1quadtree_1_1DoubleBits.html">geos::index::quadtree::DoubleBits</a></div><div class="ttdoc">DoubleBits manipulates Double numbers by using bit manipulation and bit-field extraction. </div><div class="ttdef"><b>Definition:</b> DoubleBits.h:44</div></div> </div><!-- fragment --></div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.5 </small></address> </body> </html>