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99b56195ec
Unfortunately Lemire's wyhash code was licensed as Apache, we'd rather have something compatible with GPLv2. This probably a more appropriate choice anyway.
26 lines
588 B
C++
26 lines
588 B
C++
// Copyright 2025 XTX Markets Technologies Limited
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//
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#pragma once
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#include "Common.hpp"
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#include <cstdint>
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#include <cstddef>
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// Simple Lehmer generator, which passes BigCrush
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class RandomGenerator {
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public:
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RandomGenerator(); // initialize state from /dev/urandom
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RandomGenerator(uint64_t seed); // initialize state from seedi
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UNUSED uint64_t generate64(); // [0, INT64_MAX]
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UNUSED double generateDouble(); // [0.0, 1.0]
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void generateBytes(char *buf, size_t len);
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private:
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uint64_t _state[2];
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};
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