AuroraRuntime/Include/Aurora/RNG/IRandomDevice.hpp

/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: IRandomDevice.hpp
    Date: 2021-9-3
    Author: Reece
***/
#pragma once 

namespace Aurora::RNG
{
    class IRandomDevice
    {
    public:
        virtual void     Read(void *in, AuUInt32 length) = 0;
        
        virtual AuString NextString(AuUInt32 length, ERngStringCharacters type = ERngStringCharacters::eAlphaCharacters) = 0;
        virtual void     NextString(char *string, AuUInt32 length, ERngStringCharacters type = ERngStringCharacters::eAlphaCharacters) = 0;
        virtual AuUInt8  NextByte() = 0;
        virtual bool     NextBoolean() = 0;
        virtual AuUInt32 NextU32() = 0;
        virtual AuUInt32 NextU32(AuUInt32 min, AuUInt32 max) = 0;
        virtual AuUInt64 NextU64() = 0;
        virtual AuInt32  NextInt(AuInt32 min, AuInt32 max) = 0;
        virtual double   NextDecimal() = 0;
        virtual float    NextNumber(float min, float max) = 0;
        virtual AuUInt32 NextIndex(AuUInt32 count /* = max + 1*/) = 0;
    
    
        template<typename T, int N>
        inline void NextArray(T(&array)[N])
        {
            Read(array, N * sizeof(T));
        }
    
        template<typename T>
        inline void NextArray(T *array, AuUInt32 length)
        {
            Raed(array, length * sizeof(T));
        }
    
        template<typename T>
        inline T NextTmpl()
        {
            T ret {};
            Read(&ret, sizeof(T));
            return ret;
        }
    
        template<typename T>
        inline T &NextArray(T *items, AuUInt32 count)
        {
            return items[NextIndex(count)];
        }
    
        template<typename T>
        inline T &NextVector(const AuList<T> &items)
        {
            return NextArray(items.data(), items.size());
        }
    };
    
    struct RandomDef
    {
        bool secure;
        AuOptional<AuUInt32> seed;
        AuOptional<AuUInt64> seed64;
        
        inline void SetSeed(AuUInt32 seed)
        {
            this->seed = seed;
            this->secure = false;
        }

        inline void SetSeed64(AuUInt64 seed)
        {
            this->seed64 = seed;
            this->secure = false;
        }

        inline void SetCSRNG()
        {
            this->secure = true;
            this->seed.reset();
        }
    };

    AUKN_SHARED_API(Random, IRandomDevice, const RandomDef &def);
}