SDRAngel  4.11.5
Developer docs for <a href="https://github.com/f4exb/sdrangel">SDRangel<\a>, an Open Source Qt5 / OpenGL 3.0+ SDR and signal analyzer frontend to various hardware.
rtprandom.cpp
Go to the documentation of this file.
1 /*
2 
3  This file is a part of JRTPLIB
4  Copyright (c) 1999-2017 Jori Liesenborgs
5 
6  Contact: jori.liesenborgs@gmail.com
7 
8  This library was developed at the Expertise Centre for Digital Media
9  (http://www.edm.uhasselt.be), a research center of the Hasselt University
10  (http://www.uhasselt.be). The library is based upon work done for
11  my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
12 
13  Permission is hereby granted, free of charge, to any person obtaining a
14  copy of this software and associated documentation files (the "Software"),
15  to deal in the Software without restriction, including without limitation
16  the rights to use, copy, modify, merge, publish, distribute, sublicense,
17  and/or sell copies of the Software, and to permit persons to whom the
18  Software is furnished to do so, subject to the following conditions:
19 
20  The above copyright notice and this permission notice shall be included
21  in all copies or substantial portions of the Software.
22 
23  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
24  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
26  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
28  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
29  IN THE SOFTWARE.
30 
31  */
32 
33 #if defined(WIN32) && !defined(_WIN32_WCE)
34 #define _CRT_RAND_S
35 #endif // WIN32 || _WIN32_WCE
36 
37 #include "rtprandom.h"
38 #include "rtprandomrands.h"
39 #include "rtprandomurandom.h"
40 #include "rtprandomrand48.h"
41 
42 #include <time.h>
43 #ifdef _MSC_VER
44 #include "Windows.h"
45 #else
46 #include <unistd.h>
47 #endif
48 
49 #include <QDateTime>
50 
51 namespace qrtplib
52 {
53 
55 {
56  uint32_t x;
57 #ifdef _MSC_VER
58  x = GetCurrentProcessId();
59 #else
60  x = (uint32_t) getpid();
61 #endif
62  QDateTime currentDateTime = QDateTime::currentDateTime();
63  x += currentDateTime.toTime_t();
64 #if defined(WIN32)
65  x += QDateTime::currentMSecsSinceEpoch() % 1000;
66 #else
67  x += (uint32_t)clock();
68 #endif
69  x ^= (uint32_t)((uint8_t *)this - (uint8_t *)0);
70  return x;
71 }
72 
74 {
76  RTPRandom *rRet = r;
77 
78  if (r->Init() < 0) // fall back to rand48
79  {
80  delete r;
81  rRet = new RTPRandomRand48();
82  }
83 
84  return rRet;
85 }
86 
87 } // end namespace
88 
unsigned int uint32_t
Definition: rtptypes_win.h:46
unsigned char uint8_t
Definition: rtptypes_win.h:42
static RTPRandom * CreateDefaultRandomNumberGenerator()
Definition: rtprandom.cpp:73
uint32_t PickSeed()
Definition: rtprandom.cpp:54