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37 lines
708 B
37 lines
708 B
/*
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* Copyright 2023 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#include "random.hpp"
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#include <cstdint>
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#include "esp_random.h"
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#include "komihash.h"
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namespace util {
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IRandom* sRandom = new Random();
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Random::Random() {
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esp_fill_random(&seed1_, sizeof(seed1_));
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seed2_ = seed1_;
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// komirand needs four iterations to properly self-start.
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for (int i = 0; i < 4; i++) {
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Next();
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}
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}
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auto Random::Next() -> std::uint64_t {
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return komirand(&seed1_, &seed2_);
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}
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auto Random::RangeInclusive(std::uint64_t lower,
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std::uint64_t upper) -> std::uint64_t {
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return (Next() % (upper - lower + 1)) + lower;
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}
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} // namespace util
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