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