1 files changed, 58 insertions, 0 deletions
diff --git a/src/core/hle/service/mii/mii_util.h b/src/core/hle/service/mii/mii_util.h
new file mode 100644
index 000000000..5eb6df317
--- /dev/null
+++ b/src/core/hle/service/mii/mii_util.h
@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <random>
+
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "common/uuid.h"
+#include "core/hle/service/mii/mii_types.h"
+
+namespace Service::Mii {
+class MiiUtil {
+public:
+    static u16 CalculateCrc16(const void* data, std::size_t size) {
+        s32 crc{};
+        for (std::size_t i = 0; i < size; i++) {
+            crc ^= static_cast<const u8*>(data)[i] << 8;
+            for (std::size_t j = 0; j < 8; j++) {
+                crc <<= 1;
+                if ((crc & 0x10000) != 0) {
+                    crc = (crc ^ 0x1021) & 0xFFFF;
+                }
+            }
+        }
+        return Common::swap16(static_cast<u16>(crc));
+    }
+
+    static Common::UUID MakeCreateId() {
+        return Common::UUID::MakeRandomRFC4122V4();
+    }
+
+    static Common::UUID GetDeviceId() {
+        // This should be nn::settings::detail::GetMiiAuthorId()
+        return Common::UUID::MakeDefault();
+    }
+
+    template <typename T>
+    static T GetRandomValue(T min, T max) {
+        std::random_device device;
+        std::mt19937 gen(device());
+        std::uniform_int_distribution<u64> distribution(static_cast<u64>(min),
+                                                        static_cast<u64>(max));
+        return static_cast<T>(distribution(gen));
+    }
+
+    template <typename T>
+    static T GetRandomValue(T max) {
+        return GetRandomValue<T>({}, max);
+    }
+
+    static bool IsFontRegionValid(FontRegion font, std::span<const char16_t> text) {
+        // Todo:: This function needs to check against the font tables
+        return true;
+    }
+};
+} // namespace Service::Mii