|
291
|
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
|
2 <html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
|
|
|
3 <title>Cerium: Random.cc Source File</title>
|
|
|
4 <link href="doxygen.css" rel="stylesheet" type="text/css">
|
|
|
5 <link href="tabs.css" rel="stylesheet" type="text/css">
|
|
|
6 </head><body>
|
|
|
7 <!-- Generated by Doxygen 1.5.7.1 -->
|
|
|
8 <div class="navigation" id="top">
|
|
|
9 <div class="tabs">
|
|
|
10 <ul>
|
|
|
11 <li><a href="index.html"><span>Main Page</span></a></li>
|
|
|
12 <li><a href="annotated.html"><span>Classes</span></a></li>
|
|
|
13 <li class="current"><a href="files.html"><span>Files</span></a></li>
|
|
|
14 </ul>
|
|
|
15 </div>
|
|
|
16 <div class="tabs">
|
|
|
17 <ul>
|
|
|
18 <li><a href="files.html"><span>File List</span></a></li>
|
|
|
19 </ul>
|
|
|
20 </div>
|
|
|
21 <h1>Random.cc</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#include <stdio.h></span>
|
|
|
22 <a name="l00002"></a>00002 <span class="preprocessor">#include <stdlib.h></span>
|
|
|
23 <a name="l00003"></a>00003 <span class="preprocessor">#include <sys/time.h></span>
|
|
|
24 <a name="l00004"></a>00004 <span class="preprocessor">#include "Random.h"</span>
|
|
|
25 <a name="l00005"></a>00005
|
|
|
26 <a name="l00009"></a>00009 Random::Random(<span class="keywordtype">void</span>)
|
|
|
27 <a name="l00010"></a>00010 {
|
|
|
28 <a name="l00011"></a>00011 reset();
|
|
|
29 <a name="l00012"></a>00012 }
|
|
|
30 <a name="l00013"></a>00013
|
|
|
31 <a name="l00017"></a>00017 Random::Random(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seed)
|
|
|
32 <a name="l00018"></a>00018 {
|
|
|
33 <a name="l00019"></a>00019 srandom(seed);
|
|
|
34 <a name="l00020"></a>00020 }
|
|
|
35 <a name="l00021"></a>00021
|
|
|
36 <a name="l00022"></a>00022 <span class="keywordtype">void</span>
|
|
|
37 <a name="l00023"></a>00023 Random::reset(<span class="keywordtype">void</span>)
|
|
|
38 <a name="l00024"></a>00024 {
|
|
|
39 <a name="l00025"></a>00025 FILE *fp;
|
|
|
40 <a name="l00026"></a>00026 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> seed;
|
|
|
41 <a name="l00027"></a>00027 <span class="keyword">struct </span>timeval tv;
|
|
|
42 <a name="l00028"></a>00028
|
|
|
43 <a name="l00029"></a>00029 fp = fopen(<span class="stringliteral">"/dev/urandom"</span>, <span class="stringliteral">"r"</span>);
|
|
|
44 <a name="l00030"></a>00030 <span class="keywordflow">if</span> (!fp) fp = fopen(<span class="stringliteral">"/dev/random"</span>, <span class="stringliteral">"r"</span>);
|
|
|
45 <a name="l00031"></a>00031
|
|
|
46 <a name="l00032"></a>00032 <span class="keywordflow">if</span> (fp) {
|
|
|
47 <a name="l00033"></a>00033 <span class="keywordtype">int</span> res = fread(&seed, <span class="keyword">sizeof</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>), 1, fp);
|
|
|
48 <a name="l00034"></a>00034 <span class="keywordflow">if</span> (res != <span class="keyword">sizeof</span>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)) {
|
|
|
49 <a name="l00035"></a>00035 fclose(fp);
|
|
|
50 <a name="l00036"></a>00036 fp = NULL;
|
|
|
51 <a name="l00037"></a>00037 }
|
|
|
52 <a name="l00038"></a>00038 }
|
|
|
53 <a name="l00039"></a>00039
|
|
|
54 <a name="l00040"></a>00040 <span class="keywordflow">if</span> (!fp) {
|
|
|
55 <a name="l00041"></a>00041 gettimeofday(&tv, NULL);
|
|
|
56 <a name="l00042"></a>00042 seed = (tv.tv_sec ^ tv.tv_usec);
|
|
|
57 <a name="l00043"></a>00043 } <span class="keywordflow">else</span> {
|
|
|
58 <a name="l00044"></a>00044 fclose(fp);
|
|
|
59 <a name="l00045"></a>00045 }
|
|
|
60 <a name="l00046"></a>00046
|
|
|
61 <a name="l00047"></a>00047 srandom(seed);
|
|
|
62 <a name="l00048"></a>00048 }
|
|
|
63 <a name="l00049"></a>00049
|
|
|
64 <a name="l00050"></a>00050 <span class="keywordtype">int</span>
|
|
|
65 <a name="l00051"></a>00051 Random::getData(<span class="keywordtype">void</span>)
|
|
|
66 <a name="l00052"></a>00052 {
|
|
|
67 <a name="l00053"></a>00053 <span class="keywordflow">return</span> random();
|
|
|
68 <a name="l00054"></a>00054 }
|
|
|
69 </pre></div></div>
|
|
|
70 <hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 5 18:14:06 2009 for Cerium by
|
|
|
71 <a href="http://www.doxygen.org/index.html">
|
|
|
72 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.7.1 </small></address>
|
|
|
73 </body>
|
|
|
74 </html>
|
