general: Rename NewUUID to UUID, and remove the previous UUID impl
This completes the removal of the old UUID implementation.
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Morph
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dfe11d72e3
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25db62ce15
41 changed files with 415 additions and 598 deletions
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@ -1,21 +1,22 @@
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// Copyright 2018 yuzu Emulator Project
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// Copyright 2022 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <bit>
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#include <random>
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#include <fmt/format.h>
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#include "common/assert.h"
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#include "common/tiny_mt.h"
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#include "common/uuid.h"
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namespace Common {
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namespace {
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bool IsHexDigit(char c) {
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return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
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}
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constexpr size_t RawStringSize = sizeof(UUID) * 2;
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constexpr size_t FormattedStringSize = RawStringSize + 4;
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u8 HexCharToByte(char c) {
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if (c >= '0' && c <= '9') {
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@ -31,57 +32,157 @@ u8 HexCharToByte(char c) {
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return u8{0};
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}
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std::array<u8, 0x10> ConstructFromRawString(std::string_view raw_string) {
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std::array<u8, 0x10> uuid;
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for (size_t i = 0; i < RawStringSize; i += 2) {
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uuid[i / 2] =
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static_cast<u8>((HexCharToByte(raw_string[i]) << 4) | HexCharToByte(raw_string[i + 1]));
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}
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return uuid;
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}
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std::array<u8, 0x10> ConstructFromFormattedString(std::string_view formatted_string) {
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std::array<u8, 0x10> uuid;
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size_t i = 0;
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// Process the first 8 characters.
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const auto* str = formatted_string.data();
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for (; i < 4; ++i) {
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uuid[i] = static_cast<u8>((HexCharToByte(*(str++)) << 4));
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uuid[i] |= HexCharToByte(*(str++));
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}
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// Process the next 4 characters.
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++str;
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for (; i < 6; ++i) {
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uuid[i] = static_cast<u8>((HexCharToByte(*(str++)) << 4));
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uuid[i] |= HexCharToByte(*(str++));
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}
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// Process the next 4 characters.
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++str;
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for (; i < 8; ++i) {
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uuid[i] = static_cast<u8>((HexCharToByte(*(str++)) << 4));
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uuid[i] |= HexCharToByte(*(str++));
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}
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// Process the next 4 characters.
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++str;
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for (; i < 10; ++i) {
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uuid[i] = static_cast<u8>((HexCharToByte(*(str++)) << 4));
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uuid[i] |= HexCharToByte(*(str++));
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}
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// Process the last 12 characters.
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++str;
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for (; i < 16; ++i) {
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uuid[i] = static_cast<u8>((HexCharToByte(*(str++)) << 4));
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uuid[i] |= HexCharToByte(*(str++));
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}
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return uuid;
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}
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std::array<u8, 0x10> ConstructUUID(std::string_view uuid_string) {
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const auto length = uuid_string.length();
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if (length == 0) {
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return {};
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}
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// Check if the input string contains 32 hexadecimal characters.
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if (length == RawStringSize) {
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return ConstructFromRawString(uuid_string);
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}
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// Check if the input string has the length of a RFC 4122 formatted UUID string.
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if (length == FormattedStringSize) {
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return ConstructFromFormattedString(uuid_string);
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}
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ASSERT_MSG(false, "UUID string has an invalid length of {} characters!", length);
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return {};
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}
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} // Anonymous namespace
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u128 HexStringToU128(std::string_view hex_string) {
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const size_t length = hex_string.length();
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UUID::UUID(std::string_view uuid_string) : uuid{ConstructUUID(uuid_string)} {}
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// Detect "0x" prefix.
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const bool has_0x_prefix = length > 2 && hex_string[0] == '0' && hex_string[1] == 'x';
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const size_t offset = has_0x_prefix ? 2 : 0;
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// Check length.
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if (length > 32 + offset) {
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ASSERT_MSG(false, "hex_string has more than 32 hexadecimal characters!");
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return INVALID_UUID;
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}
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u64 lo = 0;
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u64 hi = 0;
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for (size_t i = 0; i < length - offset; ++i) {
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const char c = hex_string[length - 1 - i];
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if (!IsHexDigit(c)) {
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ASSERT_MSG(false, "{} is not a hexadecimal digit!", c);
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return INVALID_UUID;
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}
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if (i < 16) {
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lo |= u64{HexCharToByte(c)} << (i * 4);
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}
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if (i >= 16) {
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hi |= u64{HexCharToByte(c)} << ((i - 16) * 4);
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}
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}
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return u128{lo, hi};
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std::string UUID::RawString() const {
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return fmt::format("{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}"
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"{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}",
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uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7],
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uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14],
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uuid[15]);
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}
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UUID UUID::Generate() {
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std::string UUID::FormattedString() const {
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return fmt::format("{:02x}{:02x}{:02x}{:02x}"
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"-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-"
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"{:02x}{:02x}{:02x}{:02x}{:02x}{:02x}",
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uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7],
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uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14],
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uuid[15]);
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}
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size_t UUID::Hash() const noexcept {
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u64 hash;
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u64 temp;
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std::memcpy(&hash, uuid.data(), sizeof(u64));
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std::memcpy(&temp, uuid.data() + 8, sizeof(u64));
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return hash ^ std::rotl(temp, 1);
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}
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u128 UUID::AsU128() const {
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u128 uuid_old;
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std::memcpy(&uuid_old, uuid.data(), sizeof(UUID));
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return uuid_old;
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}
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UUID UUID::MakeRandom() {
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std::random_device device;
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std::mt19937 gen(device());
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std::uniform_int_distribution<u64> distribution(1, std::numeric_limits<u64>::max());
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return UUID{distribution(gen), distribution(gen)};
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return MakeRandomWithSeed(device());
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}
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std::string UUID::Format() const {
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return fmt::format("{:016x}{:016x}", uuid[1], uuid[0]);
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UUID UUID::MakeRandomWithSeed(u32 seed) {
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// Create and initialize our RNG.
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TinyMT rng;
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rng.Initialize(seed);
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UUID uuid;
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// Populate the UUID with random bytes.
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rng.GenerateRandomBytes(uuid.uuid.data(), sizeof(UUID));
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return uuid;
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}
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std::string UUID::FormatSwitch() const {
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std::array<u8, 16> s{};
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std::memcpy(s.data(), uuid.data(), sizeof(u128));
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return fmt::format("{:02x}{:02x}{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{:02x}-{:02x}{"
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":02x}{:02x}{:02x}{:02x}{:02x}",
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s[0], s[1], s[2], s[3], s[4], s[5], s[6], s[7], s[8], s[9], s[10], s[11],
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s[12], s[13], s[14], s[15]);
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UUID UUID::MakeRandomRFC4122V4() {
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auto uuid = MakeRandom();
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// According to Proposed Standard RFC 4122 Section 4.4, we must:
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// 1. Set the two most significant bits (bits 6 and 7) of the
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// clock_seq_hi_and_reserved to zero and one, respectively.
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uuid.uuid[8] = 0x80 | (uuid.uuid[8] & 0x3F);
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// 2. Set the four most significant bits (bits 12 through 15) of the
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// time_hi_and_version field to the 4-bit version number from Section 4.1.3.
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uuid.uuid[6] = 0x40 | (uuid.uuid[6] & 0xF);
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return uuid;
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}
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} // namespace Common
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