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1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <random>
11 
12 // template <class UIntType, UIntType a, UIntType c, UIntType m>
13 //   class linear_congruential_engine;
14 
15 // result_type operator()();
16 
17 #include <random>
18 #include <cassert>
19 
20 template <class T>
21 void
randu()22 randu()
23 {
24     typedef std::linear_congruential_engine<T, 65539, 0, 2147483648u> E;
25     E e(1);
26     assert(e() == 65539);
27     assert(e() == 393225);
28     assert(e() == 1769499);
29     assert(e() == 7077969);
30     assert(e() == 26542323);
31     assert(e() == 95552217);
32     assert(e() == 334432395);
33     assert(e() == 1146624417);
34     assert(e() == 1722371299);
35     assert(e() == 14608041);
36     assert(e() == 1766175739);
37     assert(e() == 1875647473);
38 }
39 
40 template <class T>
41 void
minstd()42 minstd()
43 {
44     typedef std::linear_congruential_engine<T, 16807, 0, 2147483647> E;
45     E e(1);
46     assert(e() == 16807);
47     assert(e() == 282475249);
48     assert(e() == 1622650073);
49     assert(e() == 984943658);
50     assert(e() == 1144108930);
51     assert(e() == 470211272);
52     assert(e() == 101027544);
53     assert(e() == 1457850878);
54     assert(e() == 1458777923);
55     assert(e() == 2007237709);
56     assert(e() == 823564440);
57     assert(e() == 1115438165);
58 }
59 
60 template <class T>
61 void
Haldir()62 Haldir()
63 {
64     typedef std::linear_congruential_engine<T, 16807, 78125, 2147483647> E;
65     E e(207560540);
66     assert(e() == 956631177);
67     assert(e() == 2037688522);
68     assert(e() == 1509348670);
69     assert(e() == 1546336451);
70     assert(e() == 429714088);
71     assert(e() == 217250280);
72 }
73 
main()74 int main()
75 {
76     randu<unsigned int>();
77     randu<unsigned long>();
78     randu<unsigned long long>();
79 
80     minstd<unsigned int>();
81     minstd<unsigned long>();
82     minstd<unsigned long long>();
83 
84     Haldir<unsigned int>();
85     Haldir<unsigned long>();
86     Haldir<unsigned long long>();
87 }
88