54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
/*
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* Written in 2019 by David Blackman and Sebastiano Vigna (vigna@acm.org)
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*
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* To the extent possible under law, the author has dedicated all copyright
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* and related and neighboring rights to this software to the public domain
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* worldwide. This software is distributed without any warranty.
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*/
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/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2020, Danny Robson <danny@nerdcruft.net>
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*/
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#pragma once
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#include "../std.hpp"
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#include <array>
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#include <limits>
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#include <random>
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///////////////////////////////////////////////////////////////////////////////
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namespace cruft::rand {
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class xoshiro256plusplus {
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public:
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using result_type = u64;
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xoshiro256plusplus (u64 seed);
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xoshiro256plusplus (std::seed_seq&);
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static constexpr result_type min (void)
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{
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return std::numeric_limits<result_type>::min ();
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}
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static constexpr result_type max (void)
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{
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return std::numeric_limits<result_type>::max ();
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}
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result_type operator() (void);
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void jump (void);
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void long_jump (void);
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private:
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std::array<u64, 4> m_state;
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};
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} |