Linux heracles.o2switch.net 4.18.0-553.62.1.lve.el8.x86_64 #1 SMP Mon Jul 21 17:50:35 UTC 2025 x86_64
/
opt
/
alt
/
ruby21
/
share
/
doc
/
ruby
/
capi
/
html
/
d9
/
d89
/
//opt/alt/ruby21/share/doc/ruby/capi/html/d9/d89/isinf_8c_source.html
<!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/isinf.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">isinf.c</div> </div> </div><!--header--> <div class="contents"> <a href="../../d9/d89/isinf_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="comment">/* public domain rewrite of isinf(3) */</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor">#ifdef __osf__</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#define _IEEE 1</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <nan.h></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <a class="code" href="../../d9/d89/isinf_8c.html#af99f4df04bc3d1bec1f570fe87664c67">isinf</a>(<span class="keywordtype">double</span> n)</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> {</div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  <span class="keywordflow">if</span> (IsNANorINF(n) && IsINF(n)) {</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span>  }</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span>  }</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</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">#else</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include "ruby/config.h"</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#if defined(HAVE_FINITE) && defined(HAVE_ISNAN)</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 <math.h></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#ifdef HAVE_IEEEFP_H</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <ieeefp.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">/*</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * isinf may be provided only as a macro.</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * ex. HP-UX, Solaris 10</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * http://www.gnu.org/software/automake/manual/autoconf/Function-Portability.html</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> */</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#ifndef isinf</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <a class="code" href="../../d9/d89/isinf_8c.html#af99f4df04bc3d1bec1f570fe87664c67">isinf</a>(<span class="keywordtype">double</span> n)</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordflow">return</span> (!<a class="code" href="../../d3/d90/missing_8h.html#a92974cf7271cdbcd972c211baf210f6f">finite</a>(n) && !<a class="code" href="../../dc/db1/win32_8h.html#a2e1baae9134e580910322362dc23290e">isnan</a>(n));</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> }</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifdef HAVE_STRING_H</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"># include <string.h></span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor"># include <strings.h></span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> </div><div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="../../d9/d89/isinf_8c.html#a5bc81aade6dcbcbdb6984e9b1a42e836"> 51</a></span> <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="../../d9/d89/isinf_8c.html#a5bc81aade6dcbcbdb6984e9b1a42e836">zero</a>(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> 0.0; }</div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="../../d9/d89/isinf_8c.html#a94762b8530d28b85e67db02b97f3ee37"> 52</a></span> <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="../../d9/d89/isinf_8c.html#a94762b8530d28b85e67db02b97f3ee37">one</a> (<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> 1.0; }</div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="../../d9/d89/isinf_8c.html#ac0a1df65d96ba51ed5a71cca0992d03f"> 53</a></span> <span class="keyword">static</span> <span class="keywordtype">double</span> <a class="code" href="../../d9/d89/isinf_8c.html#ac0a1df65d96ba51ed5a71cca0992d03f">inf</a> (<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> <a class="code" href="../../d9/d89/isinf_8c.html#a94762b8530d28b85e67db02b97f3ee37">one</a>() / <a class="code" href="../../d9/d89/isinf_8c.html#a5bc81aade6dcbcbdb6984e9b1a42e836">zero</a>(); }</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="keywordtype">int</span></div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="../../d9/d89/isinf_8c.html#af99f4df04bc3d1bec1f570fe87664c67"> 56</a></span> <a class="code" href="../../d9/d89/isinf_8c.html#af99f4df04bc3d1bec1f570fe87664c67">isinf</a>(<span class="keywordtype">double</span> n)</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> pinf = 0.0;</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">static</span> <span class="keywordtype">double</span> ninf = 0.0;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">if</span> (pinf == 0.0) {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  pinf = <a class="code" href="../../d9/d89/isinf_8c.html#ac0a1df65d96ba51ed5a71cca0992d03f">inf</a>();</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  ninf = -pinf;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span> <a class="code" href="../../d5/d21/memcmp_8c.html#a1499ab2d0a3da86cbc3e688294f60a48">memcmp</a>(&n, &pinf, <span class="keyword">sizeof</span> n) == 0</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  || <a class="code" href="../../d5/d21/memcmp_8c.html#a1499ab2d0a3da86cbc3e688294f60a48">memcmp</a>(&n, &ninf, <span class="keyword">sizeof</span> n) == 0;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="isinf_8c_html_a5bc81aade6dcbcbdb6984e9b1a42e836"><div class="ttname"><a href="../../d9/d89/isinf_8c.html#a5bc81aade6dcbcbdb6984e9b1a42e836">zero</a></div><div class="ttdeci">static double zero(void)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d89/isinf_8c_source.html#l00051">isinf.c:51</a></div></div> <div class="ttc" id="missing_8h_html_a92974cf7271cdbcd972c211baf210f6f"><div class="ttname"><a href="../../d3/d90/missing_8h.html#a92974cf7271cdbcd972c211baf210f6f">finite</a></div><div class="ttdeci">RUBY_EXTERN int finite(double)</div><div class="ttdef"><b>Definition:</b> <a href="../../d4/d21/finite_8c_source.html#l00006">finite.c:6</a></div></div> <div class="ttc" id="isinf_8c_html_ac0a1df65d96ba51ed5a71cca0992d03f"><div class="ttname"><a href="../../d9/d89/isinf_8c.html#ac0a1df65d96ba51ed5a71cca0992d03f">inf</a></div><div class="ttdeci">static double inf(void)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d89/isinf_8c_source.html#l00053">isinf.c:53</a></div></div> <div class="ttc" id="isinf_8c_html_a94762b8530d28b85e67db02b97f3ee37"><div class="ttname"><a href="../../d9/d89/isinf_8c.html#a94762b8530d28b85e67db02b97f3ee37">one</a></div><div class="ttdeci">static double one(void)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d89/isinf_8c_source.html#l00052">isinf.c:52</a></div></div> <div class="ttc" id="memcmp_8c_html_a1499ab2d0a3da86cbc3e688294f60a48"><div class="ttname"><a href="../../d5/d21/memcmp_8c.html#a1499ab2d0a3da86cbc3e688294f60a48">memcmp</a></div><div class="ttdeci">int memcmp(const void *s1, const void *s2, size_t len)</div><div class="ttdef"><b>Definition:</b> <a href="../../d5/d21/memcmp_8c_source.html#l00007">memcmp.c:7</a></div></div> <div class="ttc" id="win32_8h_html_a2e1baae9134e580910322362dc23290e"><div class="ttname"><a href="../../dc/db1/win32_8h.html#a2e1baae9134e580910322362dc23290e">isnan</a></div><div class="ttdeci">#define isnan(x)</div><div class="ttdef"><b>Definition:</b> <a href="../../dc/db1/win32_8h_source.html#l00376">win32.h:376</a></div></div> <div class="ttc" id="isinf_8c_html_af99f4df04bc3d1bec1f570fe87664c67"><div class="ttname"><a href="../../d9/d89/isinf_8c.html#af99f4df04bc3d1bec1f570fe87664c67">isinf</a></div><div class="ttdeci">int isinf(double n)</div><div class="ttdef"><b>Definition:</b> <a href="../../d9/d89/isinf_8c_source.html#l00056">isinf.c:56</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>