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#pragma once
#include <array>
#include <cstdint>
class seed_t {
public:
// Number of seed bytes.
static constexpr std::size_t n_bytes = 64;
// Sanity check; we're relying on converting to uint32_t elsewhere,
// so let's just keep it as easy as possible.
static_assert(n_bytes % 4 == 0, "n_bytes must be multiple of 4");
// Number of uint32_t's required to store the seed.
static constexpr std::size_t n_uint32 = n_bytes / 4;
private:
std::array<std::uint8_t, n_bytes> m_data;
// Default constructor is private. Use the static
// factory functions instead.
seed_t()
{
// Factory functions do explicit initialization.
};
public:
/**
* Create a seed from system entropy.
*/
static seed_t system();
/**
* Create a seed from the given bytes.
*/
static seed_t from_bytes(std::uint8_t bytes[n_bytes]);
/**
* Convert seed to bytes.
*/
void to_bytes(std::uint8_t bytes[n_bytes]) const;
/**
* Convert seed to uint32_t's suitable for seed_seq.
*/
void to_uint32(std::uint32_t seed_seq_data[n_uint32]) const;
};
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