StableId.cpp

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#include "StableId.h"
 
#include <cstddef>
#include <random>
#include <string_view>
 
namespace core::utils {
 
namespace {
 
inline constexpr std::size_t kStableHexLength = 32;
inline constexpr std::string_view kHexAlphabet = "0123456789abcdef";
 
}
 
std::string makeStableId()
{
    static thread_local std::mt19937_64 rng(std::random_device{}());
    std::uniform_int_distribution<int> dist(0, static_cast<int>(kHexAlphabet.size() - 1));
 
    std::string out;
    out.reserve(kStableHexLength);
    for (std::size_t i = 0; i < kStableHexLength; ++i) {
        out.push_back(kHexAlphabet[static_cast<std::size_t>(dist(rng))]);
    }
    return out;
}
 
}