d20c5ac720
Used when UUID is a key in an unordered_map. The hash is produced by XORing the high and low 64-bits of the UUID together.
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
// Copyright 2018 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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#pragma once
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#include <string>
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#include <string_view>
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#include "common/common_types.h"
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namespace Common {
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constexpr u128 INVALID_UUID{{0, 0}};
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/**
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* Converts a hex string to a 128-bit unsigned integer.
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*
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* The hex string can be formatted in lowercase or uppercase, with or without the "0x" prefix.
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*
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* This function will assert and return INVALID_UUID under the following conditions:
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* - If the hex string is more than 32 characters long
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* - If the hex string contains non-hexadecimal characters
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*
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* @param hex_string Hexadecimal string
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*
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* @returns A 128-bit unsigned integer if successfully converted, INVALID_UUID otherwise.
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*/
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[[nodiscard]] u128 HexStringToU128(std::string_view hex_string);
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struct UUID {
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// UUIDs which are 0 are considered invalid!
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u128 uuid;
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UUID() = default;
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constexpr explicit UUID(const u128& id) : uuid{id} {}
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constexpr explicit UUID(const u64 lo, const u64 hi) : uuid{{lo, hi}} {}
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explicit UUID(std::string_view hex_string) {
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uuid = HexStringToU128(hex_string);
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}
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[[nodiscard]] constexpr explicit operator bool() const {
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return uuid != INVALID_UUID;
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}
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[[nodiscard]] constexpr bool operator==(const UUID& rhs) const {
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return uuid == rhs.uuid;
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}
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[[nodiscard]] constexpr bool operator!=(const UUID& rhs) const {
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return !operator==(rhs);
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}
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// TODO(ogniK): Properly generate uuids based on RFC-4122
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[[nodiscard]] static UUID Generate();
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// Set the UUID to {0,0} to be considered an invalid user
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constexpr void Invalidate() {
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uuid = INVALID_UUID;
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}
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// TODO(ogniK): Properly generate a Nintendo ID
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[[nodiscard]] constexpr u64 GetNintendoID() const {
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return uuid[0];
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}
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[[nodiscard]] std::string Format() const;
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[[nodiscard]] std::string FormatSwitch() const;
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};
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static_assert(sizeof(UUID) == 16, "UUID is an invalid size!");
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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.uuid[1] ^ uuid.uuid[0];
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}
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};
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} // namespace std
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