From bbe2c77243c541ca7e0075149f5be3262eb89523 Mon Sep 17 00:00:00 2001 From: Amlal El Mahrouss Date: Mon, 24 Nov 2025 03:05:29 +0100 Subject: feat! breaking changes on necti sources. Signed-off-by: Amlal El Mahrouss --- dev/CompilerKit/UUID.h | 826 ------------------------------------------------- 1 file changed, 826 deletions(-) delete mode 100644 dev/CompilerKit/UUID.h (limited to 'dev/CompilerKit/UUID.h') diff --git a/dev/CompilerKit/UUID.h b/dev/CompilerKit/UUID.h deleted file mode 100644 index 98733fd..0000000 --- a/dev/CompilerKit/UUID.h +++ /dev/null @@ -1,826 +0,0 @@ -#ifndef STDUUID_H -#define STDUUID_H - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef __cplusplus - -#if (__cplusplus >= 202002L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 202002L) -#define LIBUUID_CPP20_OR_GREATER -#endif - -#endif - -#ifdef LIBUUID_CPP20_OR_GREATER -#include -#else -#include -#endif - -#ifdef _WIN32 - -#ifndef WIN32_LEAN_AND_MEAN -#define WIN32_LEAN_AND_MEAN -#endif -#ifndef NOMINMAX -#define NOMINMAX -#endif - -#ifdef UUID_SYSTEM_GENERATOR -#include -#endif - -#ifdef UUID_TIME_GENERATOR -#include -#pragma comment(lib, "IPHLPAPI.lib") -#endif - -#elif defined(__linux__) || defined(__unix__) - -#ifdef UUID_SYSTEM_GENERATOR -#include -#endif - -#elif defined(__APPLE__) - -#ifdef UUID_SYSTEM_GENERATOR -#include -#endif - -#endif - -namespace uuids { -#ifdef __cpp_lib_span -template -using span = std::span; -#else -template -using span = gsl::span; -#endif - -namespace Detail { - template - [[nodiscard]] constexpr inline unsigned char hex2char(TChar const ch) noexcept { - if (ch >= static_cast('0') && ch <= static_cast('9')) - return static_cast(ch - static_cast('0')); - if (ch >= static_cast('a') && ch <= static_cast('f')) - return static_cast(10 + ch - static_cast('a')); - if (ch >= static_cast('A') && ch <= static_cast('F')) - return static_cast(10 + ch - static_cast('A')); - return 0; - } - - template - [[nodiscard]] constexpr std::basic_string_view to_string_view(TChar const* str) noexcept { - return str; - } - - template - [[nodiscard]] constexpr std::basic_string_view - to_string_view(StringType const& str) noexcept { - return str; - } - - class sha1 { - public: - using digest32_t = uint32_t[5]; - using digest8_t = uint8_t[20]; - - static constexpr unsigned int block_bytes = 64; - - [[nodiscard]] inline static uint32_t left_rotate(uint32_t value, size_t const count) noexcept { - return (value << count) ^ (value >> (32 - count)); - } - - sha1() { reset(); } - - void reset() noexcept { - m_digest[0] = 0x67452301; - m_digest[1] = 0xEFCDAB89; - m_digest[2] = 0x98BADCFE; - m_digest[3] = 0x10325476; - m_digest[4] = 0xC3D2E1F0; - m_blockByteIndex = 0; - m_byteCount = 0; - } - - void process_byte(uint8_t octet) { - this->m_block[this->m_blockByteIndex++] = octet; - ++this->m_byteCount; - if (m_blockByteIndex == block_bytes) { - this->m_blockByteIndex = 0; - process_block(); - } - } - - void process_block(void const* const start, void const* const end) { - const uint8_t* begin = static_cast(start); - const uint8_t* finish = static_cast(end); - while (begin != finish) { - process_byte(*begin); - begin++; - } - } - - void process_bytes(void const* const data, size_t const len) { - const uint8_t* block = static_cast(data); - process_block(block, block + len); - } - - uint32_t const* get_digest(digest32_t digest) { - size_t const bitCount = this->m_byteCount * 8; - process_byte(0x80); - if (this->m_blockByteIndex > 56) { - while (m_blockByteIndex != 0) { - process_byte(0); - } - while (m_blockByteIndex < 56) { - process_byte(0); - } - } else { - while (m_blockByteIndex < 56) { - process_byte(0); - } - } - process_byte(0); - process_byte(0); - process_byte(0); - process_byte(0); - process_byte(static_cast((bitCount >> 24) & 0xFF)); - process_byte(static_cast((bitCount >> 16) & 0xFF)); - process_byte(static_cast((bitCount >> 8) & 0xFF)); - process_byte(static_cast((bitCount) &0xFF)); - - memcpy(digest, m_digest, 5 * sizeof(uint32_t)); - return digest; - } - - uint8_t const* get_digest_bytes(digest8_t digest) { - digest32_t d32; - get_digest(d32); - size_t di = 0; - digest[di++] = static_cast(d32[0] >> 24); - digest[di++] = static_cast(d32[0] >> 16); - digest[di++] = static_cast(d32[0] >> 8); - digest[di++] = static_cast(d32[0] >> 0); - - digest[di++] = static_cast(d32[1] >> 24); - digest[di++] = static_cast(d32[1] >> 16); - digest[di++] = static_cast(d32[1] >> 8); - digest[di++] = static_cast(d32[1] >> 0); - - digest[di++] = static_cast(d32[2] >> 24); - digest[di++] = static_cast(d32[2] >> 16); - digest[di++] = static_cast(d32[2] >> 8); - digest[di++] = static_cast(d32[2] >> 0); - - digest[di++] = static_cast(d32[3] >> 24); - digest[di++] = static_cast(d32[3] >> 16); - digest[di++] = static_cast(d32[3] >> 8); - digest[di++] = static_cast(d32[3] >> 0); - - digest[di++] = static_cast(d32[4] >> 24); - digest[di++] = static_cast(d32[4] >> 16); - digest[di++] = static_cast(d32[4] >> 8); - digest[di++] = static_cast(d32[4] >> 0); - - return digest; - } - - private: - void process_block() { - uint32_t w[80]; - for (size_t i = 0; i < 16; i++) { - w[i] = static_cast(m_block[i * 4 + 0] << 24); - w[i] |= static_cast(m_block[i * 4 + 1] << 16); - w[i] |= static_cast(m_block[i * 4 + 2] << 8); - w[i] |= static_cast(m_block[i * 4 + 3]); - } - for (size_t i = 16; i < 80; i++) { - w[i] = left_rotate((w[i - 3] ^ w[i - 8] ^ w[i - 14] ^ w[i - 16]), 1); - } - - uint32_t a = m_digest[0]; - uint32_t b = m_digest[1]; - uint32_t c = m_digest[2]; - uint32_t d = m_digest[3]; - uint32_t e = m_digest[4]; - - for (std::size_t i = 0; i < 80; ++i) { - uint32_t f = 0; - uint32_t k = 0; - - if (i < 20) { - f = (b & c) | (~b & d); - k = 0x5A827999; - } else if (i < 40) { - f = b ^ c ^ d; - k = 0x6ED9EBA1; - } else if (i < 60) { - f = (b & c) | (b & d) | (c & d); - k = 0x8F1BBCDC; - } else { - f = b ^ c ^ d; - k = 0xCA62C1D6; - } - uint32_t temp = left_rotate(a, 5) + f + e + k + w[i]; - e = d; - d = c; - c = left_rotate(b, 30); - b = a; - a = temp; - } - - m_digest[0] += a; - m_digest[1] += b; - m_digest[2] += c; - m_digest[3] += d; - m_digest[4] += e; - } - - private: - digest32_t m_digest; - uint8_t m_block[64]; - size_t m_blockByteIndex; - size_t m_byteCount; - }; - - template - inline constexpr CharT empty_guid[37] = "00000000-0000-0000-0000-000000000000"; - - template <> - inline constexpr wchar_t empty_guid[37] = L"00000000-0000-0000-0000-000000000000"; - - template - inline constexpr CharT guid_encoder[17] = "0123456789abcdef"; - - template <> - inline constexpr wchar_t guid_encoder[17] = L"0123456789abcdef"; -} // namespace Detail - -// -------------------------------------------------------------------------------------------------------------------------- -// UUID format https://tools.ietf.org/html/rfc4122 -// -------------------------------------------------------------------------------------------------------------------------- - -// -------------------------------------------------------------------------------------------------------------------------- -// Field NDR Data Type Octet # Note -// -------------------------------------------------------------------------------------------------------------------------- -// time_low unsigned long 0 - 3 The low field -// of the timestamp. time_mid unsigned short 4 - 5 -// The middle field of the timestamp. time_hi_and_version unsigned -// short 6 - 7 The high field of the timestamp multiplexed -// with the version number. clock_seq_hi_and_reserved unsigned small 8 -// The high field of the clock sequence multiplexed with the variant. -// clock_seq_low unsigned small 9 The low -// field of the clock sequence. node character 10 -// - 15 The spatially unique node identifier. -// -------------------------------------------------------------------------------------------------------------------------- -// 0 1 2 3 -// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// | time_low | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// | time_mid | time_hi_and_version | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// |clk_seq_hi_res | clk_seq_low | node (0-1) | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ -// | node (2-5) | -// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - -// -------------------------------------------------------------------------------------------------------------------------- -// enumerations -// -------------------------------------------------------------------------------------------------------------------------- - -// indicated by a bit pattern in octet 8, marked with N in -// xxxxxxxx-xxxx-xxxx-Nxxx-xxxxxxxxxxxx -enum class uuid_variant { - // NCS backward compatibility (with the obsolete Apollo Network Computing - // System 1.5 UUID format) N bit pattern: 0xxx > the first 6 octets of the - // UUID are a 48-bit timestamp (the number of 4 microsecond units of time - // since 1 Jan 1980 UTC); > the next 2 octets are reserved; > the next octet - // is the "address family"; > the final 7 octets are a 56-bit host ID in the - // form specified by the address family - ncs, - - // RFC 4122/DCE 1.1 - // N bit pattern: 10xx - // > big-endian byte order - rfc, - - // Microsoft Corporation backward compatibility - // N bit pattern: 110x - // > little endian byte order - // > formely used in the Component Object Model (COM) library - microsoft, - - // reserved for possible future definition - // N bit pattern: 111x - reserved -}; - -// indicated by a bit pattern in octet 6, marked with M in -// xxxxxxxx-xxxx-Mxxx-xxxx-xxxxxxxxxxxx -enum class uuid_version { - none = 0, // only possible for nil or invalid uuids - time_based = 1, // The time-based version specified in RFC 4122 - dce_security = 2, // DCE Security version, with embedded POSIX UIDs. - name_based_md5 = 3, // The name-based version specified in RFS 4122 with MD5 hashing - random_number_based = 4, // The randomly or pseudo-randomly generated version - // specified in RFS 4122 - name_based_sha1 = 5 // The name-based version specified in RFS 4122 with SHA1 hashing -}; - -// Forward declare uuid & to_string so that we can declare to_string as a friend -// later. -class uuid; -template , - class Allocator = std::allocator> -std::basic_string to_string(uuid const& id); - -// -------------------------------------------------------------------------------------------------------------------------- -// uuid class -// -------------------------------------------------------------------------------------------------------------------------- -class uuid { - public: - using value_type = uint8_t; - - constexpr uuid() noexcept = default; - - uuid(value_type (&arr)[16]) noexcept { - std::copy(std::cbegin(arr), std::cend(arr), std::begin(data)); - } - - constexpr uuid(std::array const& arr) noexcept : data{arr} {} - - explicit uuid(span bytes) { - std::copy(std::cbegin(bytes), std::cend(bytes), std::begin(data)); - } - - template - explicit uuid(ForwardIterator first, ForwardIterator last) { - if (std::distance(first, last) == 16) std::copy(first, last, std::begin(data)); - } - - [[nodiscard]] constexpr uuid_variant variant() const noexcept { - if ((data[8] & 0x80) == 0x00) - return uuid_variant::ncs; - else if ((data[8] & 0xC0) == 0x80) - return uuid_variant::rfc; - else if ((data[8] & 0xE0) == 0xC0) - return uuid_variant::microsoft; - else - return uuid_variant::reserved; - } - - [[nodiscard]] constexpr uuid_version version() const noexcept { - if ((data[6] & 0xF0) == 0x10) - return uuid_version::time_based; - else if ((data[6] & 0xF0) == 0x20) - return uuid_version::dce_security; - else if ((data[6] & 0xF0) == 0x30) - return uuid_version::name_based_md5; - else if ((data[6] & 0xF0) == 0x40) - return uuid_version::random_number_based; - else if ((data[6] & 0xF0) == 0x50) - return uuid_version::name_based_sha1; - else - return uuid_version::none; - } - - [[nodiscard]] constexpr bool is_nil() const noexcept { - for (size_t i = 0; i < data.size(); ++i) - if (data[i] != 0) return false; - return true; - } - - void swap(uuid& other) noexcept { data.swap(other.data); } - - [[nodiscard]] inline span as_bytes() const { - return span(reinterpret_cast(data.data()), 16); - } - - template - [[nodiscard]] constexpr static bool is_valid_uuid(StringType const& in_str) noexcept { - auto str = Detail::to_string_view(in_str); - bool firstDigit = true; - size_t hasBraces = 0; - size_t index = 0; - - if (str.empty()) return false; - - if (str.front() == '{') hasBraces = 1; - if (hasBraces && str.back() != '}') return false; - - for (size_t i = hasBraces; i < str.size() - hasBraces; ++i) { - if (str[i] == '-') continue; - - if (index >= 16 || !std::isxdigit(static_cast(str[i]))) { - return false; - } - - if (firstDigit) { - firstDigit = false; - } else { - index++; - firstDigit = true; - } - } - - if (index < 16) { - return false; - } - - return true; - } - - template - [[nodiscard]] constexpr static std::optional from_string( - StringType const& in_str) noexcept { - auto str = Detail::to_string_view(in_str); - bool firstDigit = true; - size_t hasBraces = 0; - size_t index = 0; - - std::array data{{0}}; - - if (str.empty()) return {}; - - if (str.front() == '{') hasBraces = 1; - if (hasBraces && str.back() != '}') return {}; - - for (size_t i = hasBraces; i < str.size() - hasBraces; ++i) { - if (str[i] == '-') continue; - - if (index >= 16 || !std::isxdigit(static_cast(str[i]))) { - return {}; - } - - if (firstDigit) { - data[index] = static_cast(Detail::hex2char(str[i]) << 4); - firstDigit = false; - } else { - data[index] = static_cast(data[index] | Detail::hex2char(str[i])); - index++; - firstDigit = true; - } - } - - if (index < 16) { - return {}; - } - - return uuid{data}; - } - - private: - std::array data{{0}}; - - friend bool operator==(uuid const& lhs, uuid const& rhs) noexcept; - friend bool operator<(uuid const& lhs, uuid const& rhs) noexcept; - - template - friend std::basic_ostream& operator<<(std::basic_ostream& s, - uuid const& id); - - template - friend std::basic_string to_string(uuid const& id); - - friend std::hash; -}; - -// -------------------------------------------------------------------------------------------------------------------------- -// operators and non-member functions -// -------------------------------------------------------------------------------------------------------------------------- - -[[nodiscard]] inline bool operator==(uuid const& lhs, uuid const& rhs) noexcept { - return lhs.data == rhs.data; -} - -[[nodiscard]] inline bool operator!=(uuid const& lhs, uuid const& rhs) noexcept { - return !(lhs == rhs); -} - -[[nodiscard]] inline bool operator<(uuid const& lhs, uuid const& rhs) noexcept { - return lhs.data < rhs.data; -} - -template -[[nodiscard]] inline std::basic_string to_string(uuid const& id) { - std::basic_string uustr{Detail::empty_guid}; - - for (size_t i = 0, index = 0; i < 36; ++i) { - if (i == 8 || i == 13 || i == 18 || i == 23) { - continue; - } - uustr[i] = Detail::guid_encoder[id.data[index] >> 4 & 0x0f]; - uustr[++i] = Detail::guid_encoder[id.data[index] & 0x0f]; - index++; - } - - return uustr; -} - -template -std::basic_ostream& operator<<(std::basic_ostream& s, uuid const& id) { - s << to_string(id); - return s; -} - -inline void swap(uuids::uuid& lhs, uuids::uuid& rhs) noexcept { - lhs.swap(rhs); -} - -// -------------------------------------------------------------------------------------------------------------------------- -// namespace IDs that could be used for generating name-based uuids -// -------------------------------------------------------------------------------------------------------------------------- - -// Name string is a fully-qualified domain name -static uuid uuid_namespace_dns{{0x6b, 0xa7, 0xb8, 0x10, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, - 0xc0, 0x4f, 0xd4, 0x30, 0xc8}}; - -// Name string is a URL -static uuid uuid_namespace_url{{0x6b, 0xa7, 0xb8, 0x11, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, - 0xc0, 0x4f, 0xd4, 0x30, 0xc8}}; - -// Name string is an ISO OID (See https://oidref.com/, -// https://en.wikipedia.org/wiki/Object_identifier) -static uuid uuid_namespace_oid{{0x6b, 0xa7, 0xb8, 0x12, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, - 0xc0, 0x4f, 0xd4, 0x30, 0xc8}}; - -// Name string is an X.500 DN, in DER or a text output format (See -// https://en.wikipedia.org/wiki/X.500, -// https://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One) -static uuid uuid_namespace_x500{{0x6b, 0xa7, 0xb8, 0x14, 0x9d, 0xad, 0x11, 0xd1, 0x80, 0xb4, 0x00, - 0xc0, 0x4f, 0xd4, 0x30, 0xc8}}; - -// -------------------------------------------------------------------------------------------------------------------------- -// uuid generators -// -------------------------------------------------------------------------------------------------------------------------- - -#ifdef UUID_SYSTEM_GENERATOR -class uuid_system_generator { - public: - using result_type = uuid; - - uuid operator()() { -#ifdef _WIN32 - GUID newId{}; /// AMLALE: Should be zero-initialized. - HRESULT hr = ::CoCreateGuid(&newId); - - if (FAILED(hr)) { - throw std::system_error(hr, std::system_category(), "CoCreateGuid failed"); - } - - std::array bytes = {{static_cast((newId.Data1 >> 24) & 0xFF), - static_cast((newId.Data1 >> 16) & 0xFF), - static_cast((newId.Data1 >> 8) & 0xFF), - static_cast((newId.Data1) & 0xFF), - static_cast((newId.Data2 >> 8) & 0xFF), - static_cast((newId.Data2) & 0xFF), - static_cast((newId.Data3 >> 8) & 0xFF), - static_cast((newId.Data3) & 0xFF), - newId.Data4[0], newId.Data4[1], newId.Data4[2], - newId.Data4[3], newId.Data4[4], newId.Data4[5], - newId.Data4[6], newId.Data4[7]}}; - - return uuid{std::begin(bytes), std::end(bytes)}; - -#elif defined(__linux__) || defined(__unix__) - - uuid_t id; - uuid_generate(id); - - std::array bytes = {{id[0], id[1], id[2], id[3], id[4], id[5], id[6], id[7], id[8], - id[9], id[10], id[11], id[12], id[13], id[14], id[15]}}; - - return uuid{std::begin(bytes), std::end(bytes)}; - -#elif defined(__APPLE__) - auto newId = CFUUIDCreate(NULL); - auto bytes = CFUUIDGetUUIDBytes(newId); - CFRelease(newId); - - std::array arrbytes = {{bytes.byte0, bytes.byte1, bytes.byte2, bytes.byte3, - bytes.byte4, bytes.byte5, bytes.byte6, bytes.byte7, - bytes.byte8, bytes.byte9, bytes.byte10, bytes.byte11, - bytes.byte12, bytes.byte13, bytes.byte14, bytes.byte15}}; - return uuid{std::begin(arrbytes), std::end(arrbytes)}; -#else - return uuid{}; -#endif - } -}; -#endif - -template -class basic_uuid_random_generator { - public: - using engine_type = UniformRandomNumberGenerator; - - explicit basic_uuid_random_generator(engine_type& gen) : generator(&gen, [](auto) {}) {} - explicit basic_uuid_random_generator(engine_type* gen) : generator(gen, [](auto) {}) {} - - [[nodiscard]] uuid operator()() { - alignas(uint32_t) uint8_t bytes[16]; - for (int i = 0; i < 16; i += 4) - *reinterpret_cast(bytes + i) = distribution(*generator); - - // variant must be 10xxxxxx - bytes[8] &= 0xBF; - bytes[8] |= 0x80; - - // version must be 0100xxxx - bytes[6] &= 0x4F; - bytes[6] |= 0x40; - - return uuid{std::begin(bytes), std::end(bytes)}; - } - - private: - std::uniform_int_distribution distribution; - std::shared_ptr generator; -}; - -using uuid_random_generator = basic_uuid_random_generator; - -class uuid_name_generator { - public: - explicit uuid_name_generator(uuid const& namespace_uuid) noexcept : nsuuid(namespace_uuid) {} - - template - [[nodiscard]] uuid operator()(StringType const& name) { - reset(); - process_characters(Detail::to_string_view(name)); - return make_uuid(); - } - - private: - void reset() { - hasher.reset(); - std::byte bytes[16]; - auto nsbytes = nsuuid.as_bytes(); - std::copy(std::cbegin(nsbytes), std::cend(nsbytes), bytes); - hasher.process_bytes(bytes, 16); - } - - template - void process_characters(std::basic_string_view const str) { - for (uint32_t c : str) { - hasher.process_byte(static_cast(c & 0xFF)); - if constexpr (!std::is_same_v) { - hasher.process_byte(static_cast((c >> 8) & 0xFF)); - hasher.process_byte(static_cast((c >> 16) & 0xFF)); - hasher.process_byte(static_cast((c >> 24) & 0xFF)); - } - } - } - - [[nodiscard]] uuid make_uuid() { - Detail::sha1::digest8_t digest; - hasher.get_digest_bytes(digest); - - // variant must be 0b10xxxxxx - digest[8] &= 0xBF; - digest[8] |= 0x80; - - // version must be 0b0101xxxx - digest[6] &= 0x5F; - digest[6] |= 0x50; - - return uuid{digest, digest + 16}; - } - - private: - uuid nsuuid; - Detail::sha1 hasher; -}; - -#ifdef UUID_TIME_GENERATOR -// !!! DO NOT USE THIS IN PRODUCTION -// this implementation is unreliable for good uuids -class uuid_time_generator { - using mac_address = std::array; - - std::optional device_address; - - [[nodiscard]] bool get_mac_address() { - if (device_address.has_value()) { - return true; - } - -#ifdef _WIN32 - DWORD len = 0; - auto ret = GetAdaptersInfo(nullptr, &len); - if (ret != ERROR_BUFFER_OVERFLOW) return false; - std::vector buf(len); - auto pips = reinterpret_cast(&buf.front()); - ret = GetAdaptersInfo(pips, &len); - if (ret != ERROR_SUCCESS) return false; - mac_address addr; - std::copy(pips->Address, pips->Address + 6, std::begin(addr)); - device_address = addr; -#endif - - return device_address.has_value(); - } - - [[nodiscard]] long long get_time_intervals() { - auto start = std::chrono::system_clock::from_time_t(time_t(-12219292800)); - auto diff = std::chrono::system_clock::now() - start; - auto ns = std::chrono::duration_cast(diff).count(); - return ns / 100; - } - - [[nodiscard]] static unsigned short get_clock_sequence() { - static std::mt19937 clock_gen(std::random_device{}()); - static std::uniform_int_distribution clock_dis; - static std::atomic_ushort clock_sequence = clock_dis(clock_gen); - return clock_sequence++; - } - - public: - [[nodiscard]] uuid operator()() { - if (get_mac_address()) { - std::array data; - - auto tm = get_time_intervals(); - - auto clock_seq = get_clock_sequence(); - - auto ptm = reinterpret_cast(&tm); - - memcpy(&data[0], ptm + 4, 4); - memcpy(&data[4], ptm + 2, 2); - memcpy(&data[6], ptm, 2); - - memcpy(&data[8], &clock_seq, 2); - - // variant must be 0b10xxxxxx - data[8] &= 0xBF; - data[8] |= 0x80; - - // version must be 0b0001xxxx - data[6] &= 0x1F; - data[6] |= 0x10; - - memcpy(&data[10], &device_address.value()[0], 6); - - return uuids::uuid{std::cbegin(data), std::cend(data)}; - } - - return {}; - } -}; -#endif -} // namespace uuids - -namespace std { -template <> -struct hash { - using argument_type = uuids::uuid; - using result_type = std::size_t; - - [[nodiscard]] result_type operator()(argument_type const& uuid) const { -#ifdef UUID_HASH_STRING_BASED - std::hash hasher; - return static_cast(hasher(uuids::to_string(uuid))); -#else - uint64_t l = - static_cast(uuid.data[0]) << 56 | static_cast(uuid.data[1]) << 48 | - static_cast(uuid.data[2]) << 40 | static_cast(uuid.data[3]) << 32 | - static_cast(uuid.data[4]) << 24 | static_cast(uuid.data[5]) << 16 | - static_cast(uuid.data[6]) << 8 | static_cast(uuid.data[7]); - uint64_t h = - static_cast(uuid.data[8]) << 56 | static_cast(uuid.data[9]) << 48 | - static_cast(uuid.data[10]) << 40 | static_cast(uuid.data[11]) << 32 | - static_cast(uuid.data[12]) << 24 | static_cast(uuid.data[13]) << 16 | - static_cast(uuid.data[14]) << 8 | static_cast(uuid.data[15]); - - if constexpr (sizeof(result_type) > 4) { - return result_type(l ^ h); - } else { - uint64_t hash64 = l ^ h; - return result_type(uint32_t(hash64 >> 32) ^ uint32_t(hash64)); - } -#endif - } -}; -} // namespace std - -#endif /* STDUUID_H */ -- cgit v1.2.3