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-rw-r--r--src/common/new_uuid.h138
1 files changed, 138 insertions, 0 deletions
diff --git a/src/common/new_uuid.h b/src/common/new_uuid.h
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+// Copyright 2022 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <functional>
+#include <string>
+#include <string_view>
+
+#include "common/common_types.h"
+
+namespace Common {
+
+struct NewUUID {
+ std::array<u8, 0x10> uuid{};
+
+ /// Constructs an invalid UUID.
+ constexpr NewUUID() = default;
+
+ /// Constructs a UUID from a reference to a 128 bit array.
+ constexpr explicit NewUUID(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 NewUUID(std::string_view uuid_string);
+
+ ~NewUUID() = default;
+
+ constexpr NewUUID(const NewUUID&) noexcept = default;
+ constexpr NewUUID(NewUUID&&) noexcept = default;
+
+ constexpr NewUUID& operator=(const NewUUID&) noexcept = default;
+ constexpr NewUUID& operator=(NewUUID&&) noexcept = default;
+
+ /**
+ * 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;
+
+ /**
+ * Creates a default UUID "yuzu Default UID".
+ *
+ * @returns A UUID with its bytes set to the ASCII values of "yuzu Default UID".
+ */
+ static constexpr NewUUID MakeDefault() {
+ return NewUUID{
+ {'y', 'u', 'z', 'u', ' ', 'D', 'e', 'f', 'a', 'u', 'l', 't', ' ', 'U', 'I', 'D'},
+ };
+ }
+
+ /**
+ * Creates a random UUID.
+ *
+ * @returns A random UUID.
+ */
+ static NewUUID MakeRandom();
+
+ /**
+ * Creates a random UUID with a seed.
+ *
+ * @param seed A seed to initialize the Mersenne-Twister RNG
+ *
+ * @returns A random UUID.
+ */
+ static NewUUID 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 NewUUID MakeRandomRFC4122V4();
+
+ friend constexpr bool operator==(const NewUUID& lhs, const NewUUID& rhs) = default;
+};
+static_assert(sizeof(NewUUID) == 0x10, "UUID has incorrect size.");
+
+/// An invalid UUID. This UUID has all its bytes set to 0.
+constexpr NewUUID InvalidUUID = {};
+
+} // namespace Common
+
+namespace std {
+
+template <>
+struct hash<Common::NewUUID> {
+ size_t operator()(const Common::NewUUID& uuid) const noexcept {
+ return uuid.Hash();
+ }
+};
+
+} // namespace std