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