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132 lines
3.5 KiB
C++
132 lines
3.5 KiB
C++
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <array>
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#include <functional>
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#include <string>
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#include "common/common_types.h"
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namespace Common {
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struct UUID {
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std::array<u8, 0x10> uuid;
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constexpr UUID() = default;
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/// Constructs a UUID from a reference to a 128 bit array.
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constexpr explicit UUID(const std::array<u8, 16>& uuid_) : uuid{uuid_} {}
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/**
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* Constructs a UUID from either:
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* 1. A 32 hexadecimal character string representing the bytes of the UUID
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* 2. A RFC 4122 formatted UUID string, in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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*
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* The input string may contain uppercase or lowercase characters, but they must:
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* 1. Contain valid hexadecimal characters (0-9, a-f, A-F)
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* 2. Not contain the "0x" hexadecimal prefix
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*
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* Should the input string not meet the above requirements,
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* an assert will be triggered and an invalid UUID is set instead.
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*/
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explicit UUID(std::string_view uuid_string);
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/**
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* Returns whether the stored UUID is valid or not.
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*
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* @returns True if the stored UUID is valid, false otherwise.
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*/
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constexpr bool IsValid() const {
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return uuid != std::array<u8, 0x10>{};
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}
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/**
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* Returns whether the stored UUID is invalid or not.
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*
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* @returns True if the stored UUID is invalid, false otherwise.
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*/
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constexpr bool IsInvalid() const {
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return !IsValid();
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}
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/**
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* Returns a 32 hexadecimal character string representing the bytes of the UUID.
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*
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* @returns A 32 hexadecimal character string of the UUID.
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*/
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std::string RawString() const;
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/**
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* Returns a RFC 4122 formatted UUID string in the format xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
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*
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* @returns A RFC 4122 formatted UUID string.
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*/
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std::string FormattedString() const;
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/**
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* Returns a 64-bit hash of the UUID for use in hash table data structures.
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*
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* @returns A 64-bit hash of the UUID.
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*/
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size_t Hash() const noexcept;
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/// DO NOT USE. Copies the contents of the UUID into a u128.
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u128 AsU128() const;
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/**
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* Creates a default UUID "yuzu Default UID".
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*
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* @returns A UUID with its bytes set to the ASCII values of "yuzu Default UID".
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*/
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static constexpr UUID MakeDefault() {
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return UUID{
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{'y', 'u', 'z', 'u', ' ', 'D', 'e', 'f', 'a', 'u', 'l', 't', ' ', 'U', 'I', 'D'},
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};
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}
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/**
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* Creates a random UUID.
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*
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* @returns A random UUID.
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*/
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static UUID MakeRandom();
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/**
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* Creates a random UUID with a seed.
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*
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* @param seed A seed to initialize the Mersenne-Twister RNG
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*
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* @returns A random UUID.
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*/
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static UUID MakeRandomWithSeed(u32 seed);
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/**
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* Creates a random UUID. The generated UUID is RFC 4122 Version 4 compliant.
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*
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* @returns A random UUID that is RFC 4122 Version 4 compliant.
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*/
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static UUID MakeRandomRFC4122V4();
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friend constexpr bool operator==(const UUID& lhs, const UUID& rhs) = default;
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};
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static_assert(sizeof(UUID) == 0x10, "UUID has incorrect size.");
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static_assert(std::is_trivial_v<UUID>);
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/// An invalid UUID. This UUID has all its bytes set to 0.
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constexpr UUID InvalidUUID = {};
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} // namespace Common
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namespace std {
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template <>
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struct hash<Common::UUID> {
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size_t operator()(const Common::UUID& uuid) const noexcept {
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return uuid.Hash();
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}
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};
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} // namespace std
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