mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-03-22 15:05:03 +01:00
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
#pragma once
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#include <array>
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#include <random>
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#include <sstream>
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#include <iomanip>
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#include <string>
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#include <algorithm>
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#include <cstdint>
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class UID {
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public:
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std::array<uint8_t,16> bytes;
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static UID random() {
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static thread_local std::mt19937_64 gen(std::random_device{}());
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UID u;
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uint64_t a = gen();
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uint64_t b = gen();
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for (int i = 0; i < 8; ++i) u.bytes[i] = uint8_t((a >> (i*8)) & 0xFF);
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for (int i = 0; i < 8; ++i) u.bytes[8 + i] = uint8_t((b >> (i*8)) & 0xFF);
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u.bytes[6] = (u.bytes[6] & 0x0F) | 0x40;
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u.bytes[8] = (u.bytes[8] & 0x3F) | 0x80;
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return u;
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}
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std::string to_string() const {
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std::ostringstream os;
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os << std::hex << std::setfill('0');
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auto put = [&](int i){
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os << std::setw(2) << static_cast<int>(bytes[i]);
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};
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// format 8-4-4-4-12
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for (int i = 0; i < 4; ++i) put(i);
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for (int i = 4; i < 6; ++i) put(i);
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os << '-';
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for (int i = 6; i < 8; ++i) put(i);
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os << '-';
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for (int i = 8; i < 10; ++i) put(i);
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os << '-';
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for (int i = 10; i < 12; ++i) put(i);
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os << '-';
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for (int i = 12; i < 16; ++i) put(i);
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return os.str();
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}
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static UID from_string(const std::string& str) {
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std::istringstream is(str);
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is >> std::hex;
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UID u;
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for (int i = 0; i < 16; ++i) {
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int byte;
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is >> byte;
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u.bytes[i] = static_cast<uint8_t>(byte);
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if (is.peek() == '-') is.get();
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}
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return u;
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}
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bool operator==(const UID &other) const noexcept {
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return bytes == other.bytes;
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}
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bool operator!=(const UID &other) const noexcept {
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return !(*this == other);
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}
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}; |