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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.14"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>Ruby: missing/signbit.c Source File</title> <link href="../../tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="../../jquery.js"></script> <script type="text/javascript" src="../../dynsections.js"></script> <link href="../../doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">Ruby  <span id="projectnumber">2.1.10p492(2016-04-01revision54464)</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.14 --> <script type="text/javascript" src="../../menudata.js"></script> <script type="text/javascript" src="../../menu.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(function() { initMenu('../../',false,false,'search.php','Search'); }); /* @license-end */</script> <div id="main-nav"></div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="../../dir_f3bfeebb553c3f6ecfb19202628b4493.html">missing</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">signbit.c</div> </div> </div><!--header--> <div class="contents"> <a href="../../d8/de8/signbit_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#include <limits.h></span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#include "<a class="code" href="../../d9/d3f/ruby_8h.html">ruby.h</a>"</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00005"></a><span class="lineno"><a class="line" href="../../d8/de8/signbit_8c.html#a884f85e61d7a91827e8b9b024e099261"> 5</a></span> <a class="code" href="../../d8/de8/signbit_8c.html#a884f85e61d7a91827e8b9b024e099261">signbit</a>(<span class="keywordtype">double</span> x)</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> {</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span>  <span class="keyword">enum</span> {double_per_long = <span class="keyword">sizeof</span>(double) / <span class="keyword">sizeof</span>(<span class="keywordtype">long</span>)};</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  <span class="keyword">enum</span> {long_msb = <span class="keyword">sizeof</span>(long) * <a class="code" href="../../de/de6/ruby_2ruby_8h.html#a308d9dd2c0028ddb184b455bbd7865de">CHAR_BIT</a> - 1};</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  <span class="keyword">union </span>{<span class="keywordtype">double</span> d; <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> i[double_per_long];} u;</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> l;</div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  u.d = x;</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#ifdef WORDS_BIGENDIAN</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  l = u.i[0];</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  l = u.i[double_per_long - 1];</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span>  <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)(l >> long_msb);</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> }</div><div class="ttc" id="signbit_8c_html_a884f85e61d7a91827e8b9b024e099261"><div class="ttname"><a href="../../d8/de8/signbit_8c.html#a884f85e61d7a91827e8b9b024e099261">signbit</a></div><div class="ttdeci">int signbit(double x)</div><div class="ttdef"><b>Definition:</b> <a href="../../d8/de8/signbit_8c_source.html#l00005">signbit.c:5</a></div></div> <div class="ttc" id="ruby_8h_html"><div class="ttname"><a href="../../d9/d3f/ruby_8h.html">ruby.h</a></div></div> <div class="ttc" id="ruby_2ruby_8h_html_a308d9dd2c0028ddb184b455bbd7865de"><div class="ttname"><a href="../../de/de6/ruby_2ruby_8h.html#a308d9dd2c0028ddb184b455bbd7865de">CHAR_BIT</a></div><div class="ttdeci">#define CHAR_BIT</div><div class="ttdef"><b>Definition:</b> <a href="../../de/de6/ruby_2ruby_8h_source.html#l00198">ruby.h:198</a></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> 1.8.14 </small></address> </body> </html>
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