Switched uuids from u128 to new UUID struct

src/core/hle/service/acc/acc.h

@@ -8,6 +8,43 @@
 
 namespace Service::Account {
 
+struct UUID {
+    // UUIDs which are 0 are considered invalid!
+    u128 uuid{0, 0};
+    UUID() = default;
+    explicit UUID(const u128& id) {
+        uuid[0] = id[0];
+        uuid[1] = id[1];
+    };
+    explicit UUID(const u64& lo, const u64& hi) {
+        uuid[0] = lo;
+        uuid[1] = hi;
+    };
+    operator bool() const {
+        return uuid[0] != 0x0 && uuid[1] != 0x0;
+    }
+
+    bool operator==(const UUID& rhs) {
+        return uuid[0] == rhs.uuid[0] && uuid[1] == rhs.uuid[1];
+    }
+
+    bool operator!=(const UUID& rhs) {
+        return uuid[0] != rhs.uuid[0] || uuid[1] != rhs.uuid[1];
+    }
+
+    // TODO(ogniK): Properly generate uuids based on RFC-4122
+    const UUID& Generate() {
+        uuid[0] = (static_cast<u64>(std::rand()) << 32) | std::rand();
+        uuid[1] = (static_cast<u64>(std::rand()) << 32) | std::rand();
+        return *this;
+    }
+
+    std::string Format() {
+        return fmt::format("0x{:016X}{:016X}", uuid[1], uuid[0]);
+    }
+};
+static_assert(sizeof(UUID) == 16, "UUID is an invalid size!");
+
 class Module final {
 public:
     class Interface : public ServiceFramework<Interface> {