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