60 lines
1.1 KiB
C++
60 lines
1.1 KiB
C++
#pragma once
|
|
|
|
#include "EHS.h"
|
|
|
|
namespace lwe
|
|
{
|
|
template<typename T>
|
|
class PRNG
|
|
{
|
|
private:
|
|
T seed;
|
|
T last;
|
|
|
|
public:
|
|
PRNG()
|
|
: seed(0), last(0)
|
|
{
|
|
}
|
|
|
|
PRNG(const T seed)
|
|
: seed(seed), last(seed)
|
|
{
|
|
}
|
|
|
|
PRNG(const PRNG& prng)
|
|
: seed(prng.seed), last(prng.last)
|
|
{
|
|
}
|
|
|
|
PRNG& operator=(const PRNG& prng)
|
|
{
|
|
if (this == &prng)
|
|
return *this;
|
|
|
|
seed = prng.seed;
|
|
last = prng.last;
|
|
|
|
return *this;
|
|
}
|
|
|
|
T Generate(const T min, const T max)
|
|
{
|
|
return Generate() % (max - min) + min;
|
|
}
|
|
|
|
T Generate()
|
|
{
|
|
return ((last = last * (T)214013 + (T)2531011) >> 16) & (T)0x7fff;
|
|
}
|
|
};
|
|
|
|
typedef PRNG<SInt_64> PRNG_s64;
|
|
typedef PRNG<UInt_64> PRNG_u64;
|
|
typedef PRNG<SInt_32> PRNG_s32;
|
|
typedef PRNG<UInt_32> PRNG_u32;
|
|
typedef PRNG<SInt_16> PRNG_s16;
|
|
typedef PRNG<UInt_16> PRNG_u16;
|
|
typedef PRNG<SInt_8> PRNG_s8;
|
|
typedef PRNG<UInt_8> PRNG_u8;
|
|
} |