random.hpp

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// SPDX-License-Identifier: Apache-2.0
// Copyright 2026 Chris Leishman
 
#pragma once
 
#include <cstdint>
#include <esp_random.h>
#include <limits>
#include <span>
 
namespace idfxx {
 
[[nodiscard]] inline uint32_t random() noexcept {
    return esp_random();
}
 
inline void fill_random(std::span<uint8_t> buf) noexcept {
    esp_fill_random(buf.data(), buf.size());
}
 
inline void fill_random(std::span<std::byte> buf) noexcept {
    esp_fill_random(buf.data(), buf.size());
}
 
class random_device {
public:
    using result_type = uint32_t;
 
    static constexpr result_type min() noexcept { return std::numeric_limits<result_type>::min(); }
 
    static constexpr result_type max() noexcept { return std::numeric_limits<result_type>::max(); }
 
    result_type operator()() noexcept { return esp_random(); }
};
 
 
} // namespace idfxx