ocrm.bsky.social
the game where you go into mines and start crafting! but for consoles (forked directly from smartcmd's github)
1#include "stdafx.h"
2#include "Random.h"
3#include "System.h"
4
5Random::Random()
6{
7 // 4J - jave now uses the system nanosecond counter added to a "seedUniquifier" to get an initial seed. Our nanosecond timer is actually only millisecond accuate, so
8 // use QueryPerformanceCounter here instead
9 __int64 seed;
10 QueryPerformanceCounter((LARGE_INTEGER *)&seed);
11 seed += 8682522807148012LL;
12
13 setSeed(seed);
14}
15
16Random::Random(__int64 seed)
17{
18 setSeed(seed);
19}
20
21void Random::setSeed(__int64 s)
22{
23 this->seed = (s ^ 0x5DEECE66DLL) & ((1LL << 48) - 1);
24 haveNextNextGaussian = false;
25}
26
27int Random::next(int bits)
28{
29 seed = (seed * 0x5DEECE66DLL + 0xBLL) & ((1LL << 48) - 1);
30 return (int)(seed >> (48 - bits));
31}
32
33void Random::nextBytes(byte *bytes, unsigned int count)
34{
35 for(unsigned int i = 0; i < count; i++ )
36 {
37 bytes[i] = (byte)next(8);
38 }
39}
40
41double Random::nextDouble()
42{
43
44 return (((__int64)next(26) << 27) + next(27))
45 / (double)(1LL << 53);
46}
47
48double Random::nextGaussian()
49{
50 if (haveNextNextGaussian)
51 {
52 haveNextNextGaussian = false;
53 return nextNextGaussian;
54 }
55 else
56 {
57 double v1, v2, s;
58 do
59 {
60 v1 = 2 * nextDouble() - 1; // between -1.0 and 1.0
61 v2 = 2 * nextDouble() - 1; // between -1.0 and 1.0
62 s = v1 * v1 + v2 * v2;
63 } while (s >= 1 || s == 0);
64 double multiplier = sqrt(-2 * log(s)/s);
65 nextNextGaussian = v2 * multiplier;
66 haveNextNextGaussian = true;
67 return v1 * multiplier;
68 }
69}
70
71int Random::nextInt()
72{
73 return next(32);
74}
75
76int Random::nextInt(int n)
77{
78 assert (n>0);
79
80
81 if ((n & -n) == n) // i.e., n is a power of 2
82 return (int)(((__int64)next(31) * n) >> 31); // 4J Stu - Made __int64 instead of long
83
84 int bits, val;
85 do
86 {
87 bits = next(31);
88 val = bits % n;
89 } while(bits - val + (n-1) < 0);
90 return val;
91}
92
93float Random::nextFloat()
94{
95 return next(24) / ((float)(1 << 24));
96}
97
98__int64 Random::nextLong()
99{
100 return ((__int64)next(32) << 32) + next(32);
101}
102
103bool Random::nextBoolean()
104{
105 return next(1) != 0;
106}