Chore: Enable warnings as errors on MSVC (#6456)

* tests: add Sanity test for SplitFilename83

fix test

fix test

* disable `C4715:not all control paths return a value` for nihstro includes

nihstro: no warn

* Chore: Enable warnings as errors on msvc + fix warnings

fixes

some more warnings

clang-format

* more fixes

* Externals: Add target_compile_options `/W0` nihstro-headers and ...

Revert "disable `C4715:not all control paths return a value` for nihstro includes"
This reverts commit 606d79b55d3044b744fb835025b8eb0f4ea5b757.

* src\citra\config.cpp: ReadSetting: simplify type casting

* settings.cpp: Get*Name: remove superflous logs

src/core/arm/dynarmic/arm_tick_counts.cpp

@@ -28,8 +28,9 @@ constexpr u32 DepositBits(u32 val) {
     u32 mask = mask_;
     u32 res = 0;
     for (u32 bb = 1; mask; bb += bb) {
+        u32 neg_mask = 0 - mask;
         if (val & bb)
-            res |= mask & -mask;
+            res |= mask & neg_mask;
         mask &= mask - 1;
     }
     return res;

src/core/core_timing.h

@@ -242,10 +242,6 @@ public:
         template <class Archive>
         void serialize(Archive& ar, const unsigned int) {
             MoveEvents();
-            // NOTE: ts_queue should be empty now
-            // TODO(SaveState): Remove the next two lines when we break compatibility
-            s64 x;
-            ar& x; // to keep compatibility with old save states that stored global_timer
             ar& event_queue;
             ar& event_fifo_id;
             ar& slice_length;

src/core/dumping/ffmpeg_backend.cpp

@@ -383,7 +383,7 @@ void FFmpegAudioStream::ProcessFrame(const VariableAudioFrame& channel0,
             LOG_ERROR(Render, "Audio frame dropped: Could not resample data");
             return;
         }
-        if (static_cast<u64>(resampled_count) < frame_size) {
+        if (resampled_count < frame_size) {
             offset = resampled_count;
             break;
         }

src/core/dumping/ffmpeg_backend.h

@@ -118,14 +118,14 @@ private:
         }
     };
 
-    u64 frame_size{};
+    int frame_size{};
     u64 frame_count{};
 
     std::unique_ptr<AVFrame, AVFrameDeleter> audio_frame{};
     std::unique_ptr<SwrContext, SwrContextDeleter> swr_context{};
 
     u8** resampled_data{};
-    u64 offset{}; // Number of output samples that are currently in resampled_data.
+    int offset{}; // Number of output samples that are currently in resampled_data.
 };
 
 /**

src/core/file_sys/archive_backend.cpp

@@ -85,6 +85,7 @@ std::u16string Path::AsU16Str() const {
         return {};
     case LowPathType::Invalid:
     case LowPathType::Binary:
+    default:
         // TODO(yuriks): Add assert
         LOG_ERROR(Service_FS, "LowPathType cannot be converted to u16string!");
         return {};

src/core/file_sys/layered_fs.cpp

@@ -144,45 +144,45 @@ void LayeredFS::LoadRelocations() {
         return;
     }
 
-    const FileUtil::DirectoryEntryCallable callback = [this,
-                                                       &callback](u64* /*num_entries_out*/,
-                                                                  const std::string& directory,
-                                                                  const std::string& virtual_name) {
-        auto* parent = directory_path_map.at(directory.substr(patch_path.size() - 1));
+    const FileUtil::DirectoryEntryCallable callback =
+        [this, &callback]([[maybe_unused]] u64* num_entries_out, const std::string& directory,
+                          const std::string& virtual_name) {
+            auto* parent = directory_path_map.at(directory.substr(patch_path.size() - 1));
 
-        if (FileUtil::IsDirectory(directory + virtual_name + DIR_SEP)) {
-            const auto path = (directory + virtual_name + DIR_SEP).substr(patch_path.size() - 1);
-            if (!directory_path_map.count(path)) { // Add this directory
-                auto directory = std::make_unique<Directory>();
-                directory->name = virtual_name;
-                directory->path = path;
-                directory->parent = parent;
-                directory_path_map.emplace(path, directory.get());
-                parent->directories.emplace_back(std::move(directory));
-                LOG_INFO(Service_FS, "LayeredFS created directory {}", path);
+            if (FileUtil::IsDirectory(directory + virtual_name + DIR_SEP)) {
+                const auto path =
+                    (directory + virtual_name + DIR_SEP).substr(patch_path.size() - 1);
+                if (!directory_path_map.count(path)) { // Add this directory
+                    auto child_dir = std::make_unique<Directory>();
+                    child_dir->name = virtual_name;
+                    child_dir->path = path;
+                    child_dir->parent = parent;
+                    directory_path_map.emplace(path, child_dir.get());
+                    parent->directories.emplace_back(std::move(child_dir));
+                    LOG_INFO(Service_FS, "LayeredFS created directory {}", path);
+                }
+                return FileUtil::ForeachDirectoryEntry(nullptr, directory + virtual_name + DIR_SEP,
+                                                       callback);
             }
-            return FileUtil::ForeachDirectoryEntry(nullptr, directory + virtual_name + DIR_SEP,
-                                                   callback);
-        }
 
-        const auto path = (directory + virtual_name).substr(patch_path.size() - 1);
-        if (!file_path_map.count(path)) { // Newly created file
-            auto file = std::make_unique<File>();
-            file->name = virtual_name;
-            file->path = path;
-            file->parent = parent;
-            file_path_map.emplace(path, file.get());
-            parent->files.emplace_back(std::move(file));
-            LOG_INFO(Service_FS, "LayeredFS created file {}", path);
-        }
+            const auto path = (directory + virtual_name).substr(patch_path.size() - 1);
+            if (!file_path_map.count(path)) { // Newly created file
+                auto file = std::make_unique<File>();
+                file->name = virtual_name;
+                file->path = path;
+                file->parent = parent;
+                file_path_map.emplace(path, file.get());
+                parent->files.emplace_back(std::move(file));
+                LOG_INFO(Service_FS, "LayeredFS created file {}", path);
+            }
 
-        auto* file = file_path_map.at(path);
-        file->relocation.type = 1;
-        file->relocation.replace_file_path = directory + virtual_name;
-        file->relocation.size = FileUtil::GetSize(directory + virtual_name);
-        LOG_INFO(Service_FS, "LayeredFS replacement file in use for {}", path);
-        return true;
-    };
+            auto* file = file_path_map.at(path);
+            file->relocation.type = 1;
+            file->relocation.replace_file_path = directory + virtual_name;
+            file->relocation.size = FileUtil::GetSize(directory + virtual_name);
+            LOG_INFO(Service_FS, "LayeredFS replacement file in use for {}", path);
+            return true;
+        };
 
     FileUtil::ForeachDirectoryEntry(nullptr, patch_path, callback);
 }

src/core/file_sys/ncch_container.cpp

@@ -119,12 +119,12 @@ NCCHContainer::NCCHContainer(const std::string& filepath, u32 ncch_offset, u32 p
     file = FileUtil::IOFile(filepath, "rb");
 }
 
-Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath, u32 ncch_offset,
-                                             u32 partition) {
-    this->filepath = filepath;
-    this->ncch_offset = ncch_offset;
-    this->partition = partition;
-    file = FileUtil::IOFile(filepath, "rb");
+Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath_, u32 ncch_offset_,
+                                             u32 partition_) {
+    filepath = filepath_;
+    ncch_offset = ncch_offset_;
+    partition = partition_;
+    file = FileUtil::IOFile(filepath_, "rb");
 
     if (!file.IsOpen()) {
         LOG_WARNING(Service_FS, "Failed to open {}", filepath);
@@ -597,12 +597,12 @@ Loader::ResultStatus NCCHContainer::ApplyCodePatch(std::vector<u8>& code) const
     }};
 
     for (const PatchLocation& info : patch_paths) {
-        FileUtil::IOFile file{info.path, "rb"};
-        if (!file)
+        FileUtil::IOFile patch_file{info.path, "rb"};
+        if (!patch_file)
             continue;
 
-        std::vector<u8> patch(file.GetSize());
-        if (file.ReadBytes(patch.data(), patch.size()) != patch.size())
+        std::vector<u8> patch(patch_file.GetSize());
+        if (patch_file.ReadBytes(patch.data(), patch.size()) != patch.size())
             return Loader::ResultStatus::Error;
 
         LOG_INFO(Service_FS, "File {} patching code.bin", info.path);

src/core/frontend/applets/mii_selector.cpp

@@ -40,7 +40,7 @@ std::vector<HLE::Applets::MiiData> LoadMiis() {
                 std::array<u8, sizeof(mii)> mii_raw;
                 file->Read(saved_miis_offset, sizeof(mii), mii_raw.data());
                 std::memcpy(&mii, mii_raw.data(), sizeof(mii));
-                if (mii.mii_id != 0) {
+                if (mii.mii_id != 0u) {
                     miis.push_back(mii);
                 }
                 saved_miis_offset += sizeof(mii);

src/core/frontend/applets/mii_selector.h

@@ -31,8 +31,8 @@ struct MiiSelectorData {
 class MiiSelector {
 public:
     virtual ~MiiSelector() = default;
-    virtual void Setup(const MiiSelectorConfig& config) {
-        this->config = MiiSelectorConfig(config);
+    virtual void Setup(const MiiSelectorConfig& config_) {
+        config = MiiSelectorConfig(config_);
     }
 
     const MiiSelectorData& ReceiveData() const {

src/core/frontend/applets/swkbd.cpp

@@ -144,8 +144,8 @@ const KeyboardData& SoftwareKeyboard::ReceiveData() {
     return data;
 }
 
-void DefaultKeyboard::Execute(const Frontend::KeyboardConfig& config) {
-    SoftwareKeyboard::Execute(config);
+void DefaultKeyboard::Execute(const Frontend::KeyboardConfig& config_) {
+    SoftwareKeyboard::Execute(config_);
 
     auto cfg = Service::CFG::GetModule(Core::System::GetInstance());
     ASSERT_MSG(cfg, "CFG Module missing!");

src/core/frontend/applets/swkbd.h

@@ -85,8 +85,8 @@ public:
     /**
      * Executes the software keyboard, configured with the given parameters.
      */
-    virtual void Execute(const KeyboardConfig& config) {
-        this->config = config;
+    virtual void Execute(const KeyboardConfig& config_) {
+        config = config_;
     }
 
     /**

src/core/frontend/emu_window.cpp

@@ -173,9 +173,13 @@ void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y) {
 void EmuWindow::UpdateCurrentFramebufferLayout(unsigned width, unsigned height,
                                                bool is_portrait_mode) {
     Layout::FramebufferLayout layout;
-    const auto layout_option = Settings::values.layout_option;
-    const auto min_size = Layout::GetMinimumSizeFromLayout(
-        layout_option.GetValue(), Settings::values.upright_screen.GetValue());
+
+    // If in portrait mode, only the MobilePortrait option really makes sense
+    const Settings::LayoutOption layout_option = is_portrait_mode
+                                                     ? Settings::LayoutOption::MobilePortrait
+                                                     : Settings::values.layout_option.GetValue();
+    const auto min_size =
+        Layout::GetMinimumSizeFromLayout(layout_option, Settings::values.upright_screen.GetValue());
 
     if (Settings::values.custom_layout.GetValue() == true) {
         layout = Layout::CustomFrameLayout(width, height, Settings::values.swap_screen.GetValue());
@@ -183,11 +187,6 @@ void EmuWindow::UpdateCurrentFramebufferLayout(unsigned width, unsigned height,
         width = std::max(width, min_size.first);
         height = std::max(height, min_size.second);
 
-        // If in portrait mode, only the MobilePortrait option really makes sense
-        const Settings::LayoutOption layout_option =
-            is_portrait_mode ? Settings::LayoutOption::MobilePortrait
-                             : Settings::values.layout_option.GetValue();
-
         switch (layout_option) {
         case Settings::LayoutOption::SingleScreen:
             layout =

src/core/frontend/emu_window.h

@@ -281,7 +281,8 @@ private:
      * For the request to be honored, EmuWindow implementations will usually reimplement this
      * function.
      */
-    virtual void OnMinimalClientAreaChangeRequest(std::pair<u32, u32> minimal_size) {
+    virtual void OnMinimalClientAreaChangeRequest(
+        [[maybe_unused]] std::pair<u32, u32> minimal_size) {
         // By default, ignore this request and do nothing.
     }
 

src/core/frontend/framebuffer_layout.cpp

@@ -421,28 +421,32 @@ FramebufferLayout FrameLayoutFromResolutionScale(u32 res_scale, bool is_secondar
             if (Settings::values.upright_screen.GetValue()) {
                 if (Settings::values.swap_screen.GetValue()) {
                     width = Core::kScreenBottomHeight * res_scale;
-                    height = (Core::kScreenBottomWidth +
-                              Core::kScreenTopWidth /
-                                  Settings::values.large_screen_proportion.GetValue()) *
-                             res_scale;
+                    height =
+                        (Core::kScreenBottomWidth +
+                         static_cast<int>(Core::kScreenTopWidth /
+                                          Settings::values.large_screen_proportion.GetValue())) *
+                        res_scale;
                 } else {
                     width = Core::kScreenTopHeight * res_scale;
-                    height = (Core::kScreenTopWidth +
-                              Core::kScreenBottomWidth /
-                                  Settings::values.large_screen_proportion.GetValue()) *
-                             res_scale;
+                    height =
+                        (Core::kScreenTopWidth +
+                         static_cast<int>(Core::kScreenBottomWidth /
+                                          Settings::values.large_screen_proportion.GetValue())) *
+                        res_scale;
                 }
             } else {
                 if (Settings::values.swap_screen.GetValue()) {
                     width = (Core::kScreenBottomWidth +
                              Core::kScreenTopWidth /
-                                 Settings::values.large_screen_proportion.GetValue()) *
+                                 static_cast<int>(
+                                     Settings::values.large_screen_proportion.GetValue())) *
                             res_scale;
                     height = Core::kScreenBottomHeight * res_scale;
                 } else {
                     width = (Core::kScreenTopWidth +
                              Core::kScreenBottomWidth /
-                                 Settings::values.large_screen_proportion.GetValue()) *
+                                 static_cast<int>(
+                                     Settings::values.large_screen_proportion.GetValue())) *
                             res_scale;
                     height = Core::kScreenTopHeight * res_scale;
                 }
@@ -470,10 +474,14 @@ FramebufferLayout FrameLayoutFromResolutionScale(u32 res_scale, bool is_secondar
             break;
         case Settings::LayoutOption::MobileLandscape:
             if (Settings::values.swap_screen.GetValue()) {
-                width = (Core::kScreenBottomWidth + Core::kScreenTopWidth / 2.25f) * res_scale;
+                width =
+                    (Core::kScreenBottomWidth + static_cast<int>(Core::kScreenTopWidth / 2.25f)) *
+                    res_scale;
                 height = Core::kScreenBottomHeight * res_scale;
             } else {
-                width = (Core::kScreenTopWidth + Core::kScreenBottomWidth / 2.25f) * res_scale;
+                width =
+                    (Core::kScreenTopWidth + static_cast<int>(Core::kScreenBottomWidth / 2.25f)) *
+                    res_scale;
                 height = Core::kScreenTopHeight * res_scale;
             }
             layout = MobileLandscapeFrameLayout(
@@ -586,7 +594,7 @@ FramebufferLayout GetCardboardSettings(const FramebufferLayout& layout) {
 
 std::pair<unsigned, unsigned> GetMinimumSizeFromLayout(Settings::LayoutOption layout,
                                                        bool upright_screen) {
-    unsigned min_width, min_height;
+    u32 min_width, min_height;
 
     switch (layout) {
     case Settings::LayoutOption::SingleScreen:
@@ -597,12 +605,12 @@ std::pair<unsigned, unsigned> GetMinimumSizeFromLayout(Settings::LayoutOption la
         min_height = Core::kScreenBottomHeight;
         break;
     case Settings::LayoutOption::LargeScreen:
-        min_width =
+        min_width = static_cast<u32>(
             Settings::values.swap_screen
                 ? Core::kScreenTopWidth / Settings::values.large_screen_proportion.GetValue() +
                       Core::kScreenBottomWidth
                 : Core::kScreenTopWidth + Core::kScreenBottomWidth /
-                                              Settings::values.large_screen_proportion.GetValue();
+                                              Settings::values.large_screen_proportion.GetValue());
         min_height = Core::kScreenBottomHeight;
         break;
     case Settings::LayoutOption::SideScreen:

src/core/hle/kernel/event.h

@@ -24,8 +24,8 @@ public:
     std::string GetName() const override {
         return name;
     }
-    void SetName(const std::string& name) {
-        this->name = name;
+    void SetName(const std::string& name_) {
+        name = name_;
     }
 
     static constexpr HandleType HANDLE_TYPE = HandleType::Event;

src/core/hle/kernel/process.cpp

@@ -238,13 +238,14 @@ ResultVal<VAddr> Process::HeapAllocate(VAddr target, u32 size, VMAPermission per
             return ERR_INVALID_ADDRESS;
         }
     }
-
-    auto vma = vm_manager.FindVMA(target);
-    if (vma->second.type != VMAType::Free || vma->second.base + vma->second.size < target + size) {
-        LOG_ERROR(Kernel, "Trying to allocate already allocated memory");
-        return ERR_INVALID_ADDRESS_STATE;
+    {
+        auto vma = vm_manager.FindVMA(target);
+        if (vma->second.type != VMAType::Free ||
+            vma->second.base + vma->second.size < target + size) {
+            LOG_ERROR(Kernel, "Trying to allocate already allocated memory");
+            return ERR_INVALID_ADDRESS_STATE;
+        }
     }
-
     auto allocated_fcram = memory_region->HeapAllocate(size);
     if (allocated_fcram.empty()) {
         LOG_ERROR(Kernel, "Not enough space");

src/core/hle/kernel/shared_memory.cpp

@@ -157,14 +157,16 @@ ResultCode SharedMemory::Map(Process& target_process, VAddr address, MemoryPermi
         // APT:GetSharedFont for detail.
         target_address = linear_heap_phys_offset + Memory::LINEAR_HEAP_VADDR;
     }
-
-    auto vma = target_process.vm_manager.FindVMA(target_address);
-    if (vma->second.type != VMAType::Free ||
-        vma->second.base + vma->second.size < target_address + size) {
-        LOG_ERROR(Kernel,
-                  "cannot map id={}, address=0x{:08X} name={}, mapping to already allocated memory",
-                  GetObjectId(), address, name);
-        return ERR_INVALID_ADDRESS_STATE;
+    {
+        auto vma = target_process.vm_manager.FindVMA(target_address);
+        if (vma->second.type != VMAType::Free ||
+            vma->second.base + vma->second.size < target_address + size) {
+            LOG_ERROR(
+                Kernel,
+                "cannot map id={}, address=0x{:08X} name={}, mapping to already allocated memory",
+                GetObjectId(), address, name);
+            return ERR_INVALID_ADDRESS_STATE;
+        }
     }
 
     // Map the memory block into the target process

src/core/hle/kernel/shared_memory.h

@@ -28,8 +28,8 @@ public:
     std::string GetName() const override {
         return name;
     }
-    void SetName(std::string name) {
-        this->name = std::move(name);
+    void SetName(std::string name_) {
+        name = std::move(name_);
     }
 
     static constexpr HandleType HANDLE_TYPE = HandleType::SharedMemory;

src/core/hle/kernel/svc.cpp

@@ -1962,7 +1962,7 @@ ResultCode SVC::GetProcessList(s32* process_count, VAddr out_process_array,
     }
 
     s32 written = 0;
-    for (const auto process : kernel.GetProcessList()) {
+    for (const auto& process : kernel.GetProcessList()) {
         if (written >= out_process_array_count) {
             break;
         }

src/core/hle/kernel/thread.h

@@ -115,8 +115,8 @@ public:
      */
     const std::vector<std::shared_ptr<Thread>>& GetThreadList();
 
-    void SetCPU(ARM_Interface& cpu) {
-        this->cpu = &cpu;
+    void SetCPU(ARM_Interface& cpu_) {
+        cpu = &cpu_;
     }
 
     std::unique_ptr<ARM_Interface::ThreadContext> NewContext() {

src/core/hle/service/apt/applet_manager.cpp

@@ -1197,8 +1197,8 @@ static void CaptureFrameBuffer(Core::System& system, u32 capture_offset, VAddr s
     auto dst_vaddr = screen_capture_base_vaddr + capture_offset;
     auto dst_ptr = system.Memory().GetPointer(dst_vaddr);
     const auto src_ptr = system.Memory().GetPointer(src);
-    for (auto y = 0; y < height; y++) {
-        for (auto x = 0; x < screen_width; x++) {
+    for (u32 y = 0; y < height; y++) {
+        for (u32 x = 0; x < screen_width; x++) {
             auto dst_offset =
                 VideoCore::GetMortonOffset(x, y, bpp) + (y & ~7) * screen_width_pow2 * bpp;
             auto src_offset = bpp * (screen_width * y + x);

src/core/hle/service/apt/apt.cpp

@@ -929,7 +929,7 @@ void Module::APTInterface::StoreSysMenuArg(Kernel::HLERequestContext& ctx) {
 
 void Module::APTInterface::SendCaptureBufferInfo(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x40, 1, 2); // 0x00400042
-    const auto size = rp.Pop<u32>();
+    [[maybe_unused]] const auto size = rp.Pop<u32>();
     const auto buffer = rp.PopStaticBuffer();
 
     LOG_DEBUG(Service_APT, "called");

src/core/hle/service/fs/fs_user.cpp

@@ -855,7 +855,7 @@ ResultVal<u16> FS_USER::GetSpecialContentIndexFromGameCard(u64 title_id, Special
     case SpecialContentType::DLPChild:
         return MakeResult(static_cast<u16>(NCSDContentIndex::DLP));
     default:
-        ASSERT(false);
+        UNREACHABLE();
     }
 }
 

src/core/hle/service/nwm/nwm_uds.cpp

@@ -1424,8 +1424,8 @@ void NWM_UDS::DecryptBeaconData(Kernel::HLERequestContext& ctx, u16 command_id)
         auto& node = nodes.emplace_back();
         node.friend_code_seed = info.friend_code_seed;
         node.network_node_id = info.network_node_id;
-        for (std::size_t i = 0; i < info.username.size(); ++i) {
-            node.username[i] = info.username[i];
+        for (std::size_t j = 0; j < info.username.size(); ++j) {
+            node.username[j] = info.username[j];
         }
     }
 

src/core/hle/service/nwm/uds_data.cpp

@@ -82,7 +82,7 @@ static std::array<u8, CryptoPP::Weak::MD5::DIGESTSIZE> GetDataCryptoCTR(
  * Generates the key used for encrypting the 802.11 data frames generated by UDS.
  * @returns The key used for data frames crypto.
  */
-static std::array<u8, CryptoPP::AES::BLOCKSIZE> GenerateDataCCMPKey(
+[[maybe_unused]] static std::array<u8, CryptoPP::AES::BLOCKSIZE> GenerateDataCCMPKey(
     const std::vector<u8>& passphrase, const NetworkInfo& network_info) {
     // Calculate the MD5 hash of the input passphrase.
     std::array<u8, CryptoPP::Weak::MD5::DIGESTSIZE> passphrase_hash;
@@ -157,11 +157,10 @@ static std::vector<u8> GenerateCCMPAAD(const MacAddress& sender, const MacAddres
  * Decrypts the payload of an encrypted 802.11 data frame using the specified key.
  * @returns The decrypted payload.
  */
-static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload,
-                                        const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
-                                        const MacAddress& sender, const MacAddress& receiver,
-                                        const MacAddress& bssid, u16 sequence_number,
-                                        u16 frame_control) {
+[[maybe_unused]] static std::vector<u8> DecryptDataFrame(
+    const std::vector<u8>& encrypted_payload,
+    const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key, const MacAddress& sender,
+    const MacAddress& receiver, const MacAddress& bssid, u16 sequence_number, u16 frame_control) {
 
     // Reference: IEEE 802.11-2007
 
@@ -218,11 +217,10 @@ static std::vector<u8> DecryptDataFrame(const std::vector<u8>& encrypted_payload
  * Encrypts the payload of an 802.11 data frame using the specified key.
  * @returns The encrypted payload.
  */
-static std::vector<u8> EncryptDataFrame(const std::vector<u8>& payload,
-                                        const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
-                                        const MacAddress& sender, const MacAddress& receiver,
-                                        const MacAddress& bssid, u16 sequence_number,
-                                        u16 frame_control) {
+[[maybe_unused]] static std::vector<u8> EncryptDataFrame(
+    const std::vector<u8>& payload, const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
+    const MacAddress& sender, const MacAddress& receiver, const MacAddress& bssid,
+    u16 sequence_number, u16 frame_control) {
     // Reference: IEEE 802.11-2007
 
     std::vector<u8> aad = GenerateCCMPAAD(sender, receiver, bssid, frame_control);

src/core/hle/service/plgldr/plgldr.cpp

@@ -99,7 +99,7 @@ void PLG_LDR::OnProcessRun(Kernel::Process& process, Kernel::KernelSystem& kerne
             plugin_root + fmt::format("{:016X}", process.codeset->program_id);
         FileUtil::FSTEntry entry;
         FileUtil::ScanDirectoryTree(plugin_tid, entry);
-        for (const auto child : entry.children) {
+        for (const auto& child : entry.children) {
             if (!child.isDirectory && child.physicalName.ends_with(".3gx")) {
                 plgldr_context.is_default_path = false;
                 plgldr_context.plugin_path = child.physicalName;

src/core/hle/service/soc_u.cpp

@@ -794,8 +794,6 @@ void SOC_U::Poll(Kernel::HLERequestContext& ctx) {
         ret = TranslateError(GET_ERRNO);
     }
 
-    size_t test = platform_pollfd.size();
-
     IPC::RequestBuilder rb = rp.MakeBuilder(2, 2);
     rb.Push(RESULT_SUCCESS);
     rb.Push(ret);

src/core/hw/aes/key.cpp

@@ -298,13 +298,13 @@ void LoadSafeModeNativeFirmKeysOld3DS() {
     std::vector<u8> firm_buffer(size);
     firm->Read(0, firm_buffer.size(), firm_buffer.data());
     firm->Close();
-
-    AESKey key;
-    constexpr std::size_t SLOT_0x31_KEY_Y_OFFSET = 817672;
-    std::memcpy(key.data(), firm_buffer.data() + SLOT_0x31_KEY_Y_OFFSET, sizeof(key));
-    key_slots.at(0x31).SetKeyY(key);
-    LOG_DEBUG(HW_AES, "Loaded Slot0x31 KeyY: {}", KeyToString(key));
-
+    {
+        AESKey key;
+        constexpr std::size_t SLOT_0x31_KEY_Y_OFFSET = 817672;
+        std::memcpy(key.data(), firm_buffer.data() + SLOT_0x31_KEY_Y_OFFSET, sizeof(key));
+        key_slots.at(0x31).SetKeyY(key);
+        LOG_DEBUG(HW_AES, "Loaded Slot0x31 KeyY: {}", KeyToString(key));
+    }
     auto LoadCommonKey = [&firm_buffer](std::size_t key_slot) -> AESKey {
         constexpr std::size_t START_OFFSET = 836533;
         constexpr std::size_t OFFSET = 0x14; // 0x10 bytes for key + 4 bytes between keys
@@ -417,13 +417,13 @@ void LoadNativeFirmKeysNew3DS() {
     d2.SetKeyWithIV(normal_key_slot0x15->data(), normal_key_slot0x15->size(),
                     arm9_header.CTR.data(), arm9_header.CTR.size());
     d2.ProcessData(arm9_binary.data(), enc_arm9_binary.data(), enc_arm9_binary.size());
-
-    AESKey key;
-    constexpr std::size_t SLOT_0x31_KEY_Y_OFFSET = 517368;
-    std::memcpy(key.data(), arm9_binary.data() + SLOT_0x31_KEY_Y_OFFSET, sizeof(key));
-    key_slots.at(0x31).SetKeyY(key);
-    LOG_DEBUG(HW_AES, "Loaded Slot0x31 KeyY: {}", KeyToString(key));
-
+    {
+        AESKey key;
+        constexpr std::size_t SLOT_0x31_KEY_Y_OFFSET = 517368;
+        std::memcpy(key.data(), arm9_binary.data() + SLOT_0x31_KEY_Y_OFFSET, sizeof(key));
+        key_slots.at(0x31).SetKeyY(key);
+        LOG_DEBUG(HW_AES, "Loaded Slot0x31 KeyY: {}", KeyToString(key));
+    }
     auto LoadCommonKey = [&arm9_binary](std::size_t key_slot) -> AESKey {
         constexpr std::size_t START_OFFSET = 541065;
         constexpr std::size_t OFFSET = 0x14; // 0x10 bytes for key + 4 bytes between keys

src/core/loader/loader.h

@@ -118,7 +118,7 @@ public:
      * @returns A pair with the optional N3ds mode, and the status.
      */
     virtual std::pair<std::optional<u8>, ResultStatus> LoadKernelN3dsMode() {
-        return std::make_pair(0, ResultStatus::Success);
+        return std::make_pair(u8(0), ResultStatus::Success);
     }
 
     /**
@@ -136,7 +136,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadCode(std::vector<u8>& buffer) {
+    virtual ResultStatus ReadCode([[maybe_unused]] std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -145,7 +145,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadIcon(std::vector<u8>& buffer) {
+    virtual ResultStatus ReadIcon([[maybe_unused]] std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -154,7 +154,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadBanner(std::vector<u8>& buffer) {
+    virtual ResultStatus ReadBanner([[maybe_unused]] std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -163,7 +163,7 @@ public:
      * @param buffer Reference to buffer to store data
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadLogo(std::vector<u8>& buffer) {
+    virtual ResultStatus ReadLogo([[maybe_unused]] std::vector<u8>& buffer) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -172,7 +172,7 @@ public:
      * @param out_program_id Reference to store program id into
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadProgramId(u64& out_program_id) {
+    virtual ResultStatus ReadProgramId([[maybe_unused]] u64& out_program_id) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -181,7 +181,7 @@ public:
      * @param out_extdata_id Reference to store extdata id into
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadExtdataId(u64& out_extdata_id) {
+    virtual ResultStatus ReadExtdataId([[maybe_unused]] u64& out_extdata_id) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -191,7 +191,8 @@ public:
      * @param romfs_file The file containing the RomFS
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadRomFS(std::shared_ptr<FileSys::RomFSReader>& romfs_file) {
+    virtual ResultStatus ReadRomFS(
+        [[maybe_unused]] std::shared_ptr<FileSys::RomFSReader>& romfs_file) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -200,7 +201,7 @@ public:
      * @param target_path The target path to dump to
      * @return ResultStatus result of function
      */
-    virtual ResultStatus DumpRomFS(const std::string& target_path) {
+    virtual ResultStatus DumpRomFS([[maybe_unused]] const std::string& target_path) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -210,7 +211,8 @@ public:
      * @param romfs_file The file containing the RomFS
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadUpdateRomFS(std::shared_ptr<FileSys::RomFSReader>& romfs_file) {
+    virtual ResultStatus ReadUpdateRomFS(
+        [[maybe_unused]] std::shared_ptr<FileSys::RomFSReader>& romfs_file) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -219,7 +221,7 @@ public:
      * @param target_path The target path to dump to
      * @return ResultStatus result of function
      */
-    virtual ResultStatus DumpUpdateRomFS(const std::string& target_path) {
+    virtual ResultStatus DumpUpdateRomFS([[maybe_unused]] const std::string& target_path) {
         return ResultStatus::ErrorNotImplemented;
     }
 
@@ -228,7 +230,7 @@ public:
      * @param title Reference to store the application title into
      * @return ResultStatus result of function
      */
-    virtual ResultStatus ReadTitle(std::string& title) {
+    virtual ResultStatus ReadTitle([[maybe_unused]] std::string& title) {
         return ResultStatus::ErrorNotImplemented;
     }
 

src/core/loader/ncch.cpp

@@ -55,7 +55,7 @@ std::pair<std::optional<u32>, ResultStatus> AppLoader_NCCH::LoadKernelSystemMode
     if (!is_loaded) {
         ResultStatus res = base_ncch.Load();
         if (res != ResultStatus::Success) {
-            return std::make_pair(std::optional<u32>{}, res);
+            return std::make_pair(std::nullopt, res);
         }
     }
 
@@ -68,7 +68,7 @@ std::pair<std::optional<u8>, ResultStatus> AppLoader_NCCH::LoadKernelN3dsMode()
     if (!is_loaded) {
         ResultStatus res = base_ncch.Load();
         if (res != ResultStatus::Success) {
-            return std::make_pair(std::optional<u8>{}, res);
+            return std::make_pair(std::nullopt, res);
         }
     }