55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
#include "random.hpp"
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#include <math.h>
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#include <stdlib.h> /* srand, rand */
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#include <time.h> /* time */
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#include <stdio.h>
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#include <random>
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#include <Windows.h>
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#include "config.hpp"
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g_random random;
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unsigned __int64 t_random::get_Seed() {
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return seed;
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}
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void t_random::set_Seed(unsigned __int64 new_seed) {
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seed = new_seed;
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srand((unsigned int)seed);
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}
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// Robert Jenkins' 96 bit Mix Function
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unsigned long mix(unsigned long a, unsigned long b, unsigned long c)
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{
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a = a - b; a = a - c; a = a ^ (c >> 13);
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b = b - c; b = b - a; b = b ^ (a << 8);
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c = c - a; c = c - b; c = c ^ (b >> 13);
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a = a - b; a = a - c; a = a ^ (c >> 12);
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b = b - c; b = b - a; b = b ^ (a << 16);
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c = c - a; c = c - b; c = c ^ (b >> 5);
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a = a - b; a = a - c; a = a ^ (c >> 3);
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b = b - c; b = b - a; b = b ^ (a << 10);
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c = c - a; c = c - b; c = c ^ (b >> 15);
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return c;
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}
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unsigned __int64 t_random::random_seed() {
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srand((unsigned long)mix(clock(), (unsigned long)time(NULL), GetCurrentProcessId())); //http://web.archive.org/web/20070111091013/http://www.concentric.net/~Ttwang/tech/inthash.htm
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unsigned __int64 upper = (unsigned __int64)rand() << 32; // generate a random upper 32 bits
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unsigned __int64 lower = (unsigned __int64)rand(); // generate a random lower 32 bits
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unsigned __int64 result = upper | lower; // combine the upper and lower bits
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return result;
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}
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bool t_random::get_proctype() {
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return (rand() % 100) < PROB_ANSI;
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}
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int t_random::get_less(int min, int max) {
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std::random_device rd; //Will be used to obtain a seed for the random number engine
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std::mt19937 gen(rd()); //Standard mersenne_twister_engine seeded with rd()
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std::uniform_int_distribution<> dis(min, max);
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return dis(gen);
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} |