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

CMakeLists.txt

@@ -60,6 +60,8 @@ CMAKE_DEPENDENT_OPTION(ENABLE_FDK "Use FDK AAC decoder" OFF "NOT ENABLE_FFMPEG_A
 
 CMAKE_DEPENDENT_OPTION(CITRA_BUNDLE_LIBRARIES "Bundle dependent libraries with the output executables" ON "APPLE" OFF)
 
+option(CITRA_WARNINGS_AS_ERRORS "Enable warnings as errors" ON)
+
 if (CITRA_USE_PRECOMPILED_HEADERS)
     if (MSVC AND CCACHE)
         # buildcache does not properly cache PCH files, leading to compilation errors.

externals/CMakeLists.txt

@@ -103,7 +103,9 @@ target_include_directories(microprofile INTERFACE ./microprofile)
 # Nihstro
 add_library(nihstro-headers INTERFACE)
 target_include_directories(nihstro-headers INTERFACE ./nihstro/include)
-
+if (MSVC)
+    target_compile_options(nihstro-headers INTERFACE /W0)
+endif()
 # Open Source Archives
 add_subdirectory(open_source_archives)
 

src/CMakeLists.txt

@@ -24,67 +24,62 @@ if (MSVC)
     # /W3                 - Level 3 warnings
     # /MP                 - Multi-threaded compilation
     # /Zi                 - Output debugging information
+    # /Zm                 - Specifies the precompiled header memory allocation limit
     # /Zo                 - Enhanced debug info for optimized builds
     # /permissive-        - Enables stricter C++ standards conformance checks
     # /EHsc               - C++-only exception handling semantics
+    # /utf-8              - Set source and execution character sets to UTF-8
     # /volatile:iso       - Use strict standards-compliant volatile semantics.
     # /Zc:externConstexpr - Allow extern constexpr variables to have external linkage, like the standard mandates
     # /Zc:inline          - Let codegen omit inline functions in object files
     # /Zc:throwingNew     - Let codegen assume `operator new` (without std::nothrow) will never return null
-    # /external:*         - Suppress warnings from external headers
+    # /GT                 - Supports fiber safety for data allocated using static thread-local storage
-    if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-        # Ignore /Zc:externConstexpr /Zc:throwingNew /experimental:external when using clang-cl
-        add_compile_options(
-            /MP
-            /permissive-
-            /EHsc
-            /volatile:iso
-            /Zc:inline
-            /external:I "${CMAKE_SOURCE_DIR}/externals"
-            /external:anglebrackets
-            /external:W0
-
-            # Warnings
-            /W3
-            /we4062 # enumerator 'identifier' in a switch of enum 'enumeration' is not handled
-            /we4101 # 'identifier': unreferenced local variable
-            /we4265 # 'class': class has virtual functions, but destructor is not virtual
-            /we4267 # 'var': conversion from 'size_t' to 'type', possible loss of data
-            /we4388 # signed/unsigned mismatch
-            /we4547 # 'operator' : operator before comma has no effect; expected operator with side-effect
-            /we4549 # 'operator1': operator before comma has no effect; did you intend 'operator2'?
-            /we4555 # Expression has no effect; expected expression with side-effect
-            /we4834 # Discarding return value of function with 'nodiscard' attribute
-            /we5038 # data member 'member1' will be initialized after data member 'member2'
-        )
-    else()
     add_compile_options(
         /MP
+        /Zm200
         /Zo
         /permissive-
         /EHsc
+        /std:c++latest
+        /utf-8
         /volatile:iso
         /Zc:externConstexpr
         /Zc:inline
         /Zc:throwingNew
-            /experimental:external
+        /GT
-            /external:I "${CMAKE_SOURCE_DIR}/externals"
+
-            /external:anglebrackets
+        # External headers diagnostics
-            /external:W0
+        /experimental:external  # Enables the external headers options. This option isn't required in Visual Studio 2019 version 16.10 and later
+        /external:anglebrackets # Treats all headers included by #include <header>, where the header file is enclosed in angle brackets (< >), as external headers
+        /external:W0            # Sets the default warning level to 0 for external headers, effectively turning off warnings for external headers
 
         # Warnings
         /W3
-            /we4062 # enumerator 'identifier' in a switch of enum 'enumeration' is not handled
+
-            /we4101 # 'identifier': unreferenced local variable
+        /we4062 # Enumerator 'identifier' in a switch of enum 'enumeration' is not handled
+        /we4189 # 'identifier': local variable is initialized but not referenced
         /we4265 # 'class': class has virtual functions, but destructor is not virtual
-            /we4267 # 'var': conversion from 'size_t' to 'type', possible loss of data
+        /we4388 # 'expression': signed/unsigned mismatch
-            /we4388 # signed/unsigned mismatch
+        /we4389 # 'operator': signed/unsigned mismatch
-            /we4547 # 'operator' : operator before comma has no effect; expected operator with side-effect
+        /we4456 # Declaration of 'identifier' hides previous local declaration
+        /we4457 # Declaration of 'identifier' hides function parameter
+        # /we4458 TODO: Enable me # Declaration of 'identifier' hides class member
+        /we4459 # Declaration of 'identifier' hides global declaration
+        /we4505 # 'function': unreferenced local function has been removed
+        /we4547 # 'operator': operator before comma has no effect; expected operator with side-effect
         /we4549 # 'operator1': operator before comma has no effect; did you intend 'operator2'?
         /we4555 # Expression has no effect; expected expression with side-effect
-            /we4834 # Discarding return value of function with 'nodiscard' attribute
+        /we4826 # Conversion from 'type1' to 'type2' is sign-extended. This may cause unexpected runtime behavior.
         /we5038 # data member 'member1' will be initialized after data member 'member2'
+        /we5233 # explicit lambda capture 'identifier' is not used
+        /we5245 # 'function': unreferenced function with internal linkage has been removed
+
+        /wd4100 # 'identifier': unreferenced formal parameter
+        /wd4324 # 'struct_name': structure was padded due to __declspec(align())
     )
+
+    if (CITRA_WARNINGS_AS_ERRORS)
+        add_compile_options(/WX)
     endif()
 
     # Since MSVC's debugging information is not very deterministic, so we have to disable it

src/audio_core/hle/wmf_decoder.cpp

@@ -138,9 +138,7 @@ std::optional<BinaryResponse> WMFDecoder::Impl::Initalize(const BinaryRequest& r
 
 MFOutputState WMFDecoder::Impl::DecodingLoop(ADTSData adts_header,
                                              std::array<std::vector<u8>, 2>& out_streams) {
-    MFOutputState output_status = MFOutputState::OK;
     std::optional<std::vector<f32>> output_buffer;
-    unique_mfptr<IMFSample> output;
 
     while (true) {
         auto [output_status, output] = ReceiveSample(transform.get(), out_stream_id);

src/audio_core/lle/lle.cpp

@@ -450,7 +450,8 @@ void DspLle::SetServiceToInterrupt(std::weak_ptr<Service::DSP::DSP_DSP> dsp) {
                 return;
             if (pipe == 0) {
                 // pipe 0 is for debug. 3DS automatically drains this pipe and discards the data
-                impl->ReadPipe(static_cast<u8>(pipe), impl->GetPipeReadableSize(pipe));
+                impl->ReadPipe(static_cast<u8>(pipe),
+                               impl->GetPipeReadableSize(static_cast<u8>(pipe)));
             } else {
                 std::lock_guard lock(HLE::g_hle_lock);
                 if (auto locked = dsp.lock()) {

src/citra/citra.cpp

@@ -368,6 +368,8 @@ int main(int argc, char** argv) {
         case Settings::GraphicsAPI::Software:
             return std::make_unique<EmuWindow_SDL2_SW>(fullscreen, is_secondary);
         }
+        LOG_ERROR(Frontend, "Invalid Graphics API, using OpenGL");
+        return std::make_unique<EmuWindow_SDL2_GL>(fullscreen, is_secondary);
     };
 
     const auto emu_window{create_emu_window(fullscreen, false)};

src/citra/config.cpp

@@ -88,7 +88,8 @@ void Config::ReadSetting(const std::string& group, Settings::Setting<bool>& sett
 template <typename Type, bool ranged>
 void Config::ReadSetting(const std::string& group, Settings::Setting<Type, ranged>& setting) {
     if constexpr (std::is_floating_point_v<Type>) {
-        setting = sdl2_config->GetReal(group, setting.GetLabel(), setting.GetDefault());
+        setting = static_cast<Type>(
+            sdl2_config->GetReal(group, setting.GetLabel(), setting.GetDefault()));
     } else {
         setting = static_cast<Type>(sdl2_config->GetInteger(
             group, setting.GetLabel(), static_cast<long>(setting.GetDefault())));

src/citra/emu_window/emu_window_sdl2.h

@@ -71,7 +71,7 @@ protected:
     SDL_Window* render_window;
 
     /// Internal SDL2 window ID
-    int render_window_id{};
+    u32 render_window_id{};
 
     /// Fake hidden window for the core context
     SDL_Window* dummy_window;

src/citra/emu_window/emu_window_sdl2_sw.cpp

@@ -67,9 +67,10 @@ void EmuWindow_SDL2_SW::Present() {
         Core::kScreenTopWidth, Core::kScreenTopHeight + Core::kScreenBottomHeight, false, false)};
 
     while (IsOpen()) {
-        SDL_SetRenderDrawColor(renderer, Settings::values.bg_red.GetValue() * 255,
+        SDL_SetRenderDrawColor(renderer,
-                               Settings::values.bg_green.GetValue() * 255,
+                               static_cast<Uint8>(Settings::values.bg_red.GetValue() * 255),
-                               Settings::values.bg_blue.GetValue() * 255, 0xFF);
+                               static_cast<Uint8>(Settings::values.bg_green.GetValue() * 255),
+                               static_cast<Uint8>(Settings::values.bg_blue.GetValue() * 255), 0xFF);
         SDL_RenderClear(renderer);
 
         const auto draw_screen = [&](int fb_id) {
@@ -121,6 +122,7 @@ SDL_Surface* EmuWindow_SDL2_SW::LoadFramebuffer(int fb_id) {
                 case GPU::Regs::PixelFormat::RGBA4:
                     return Common::Color::DecodeRGBA4(pixel);
                 }
+                UNREACHABLE();
             }();
 
             u8* dst_pixel = reinterpret_cast<u8*>(surface->pixels) + (y * width + x) * 4;

src/citra_qt/bootmanager.cpp

@@ -338,6 +338,7 @@ struct SoftwareRenderWidget : public RenderWidget {
                     case GPU::Regs::PixelFormat::RGBA4:
                         return Common::Color::DecodeRGBA4(pixel);
                     }
+                    UNREACHABLE();
                 }();
 
                 image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), color.a()));

src/citra_qt/configuration/configuration_shared.h

@@ -6,6 +6,7 @@
 
 #include <QCheckBox>
 #include <QComboBox>
+#include "common/assert.h"
 #include "common/settings.h"
 
 namespace ConfigurationShared {
@@ -91,6 +92,7 @@ Type GetComboboxSetting(int index, const Settings::SwitchableSetting<Type, range
             return static_cast<Type>(index - ConfigurationShared::USE_GLOBAL_OFFSET);
         }
     }
+    UNREACHABLE();
 }
 
 /// Given a Qt widget sets the background color to indicate whether the setting

src/citra_qt/game_list.cpp

@@ -623,8 +623,10 @@ void GameList::AddCustomDirPopup(QMenu& context_menu, QModelIndex selected) {
 void GameList::AddPermDirPopup(QMenu& context_menu, QModelIndex selected) {
     const int game_dir_index = selected.data(GameListDir::GameDirRole).toInt();
 
-    QAction* move_up = context_menu.addAction(tr("\u25b2 Move Up"));
+    QAction* move_up =
-    QAction* move_down = context_menu.addAction(tr("\u25bc Move Down "));
+        context_menu.addAction(tr("Move Up").prepend(QString::fromWCharArray(L"\u25b2 ")));
+    QAction* move_down =
+        context_menu.addAction(tr("Move Down").prepend(QString::fromWCharArray(L"\u25bc ")));
     QAction* open_directory_location = context_menu.addAction(tr("Open Directory Location"));
 
     const int row = selected.row();

src/citra_qt/main.cpp

@@ -2287,7 +2287,8 @@ void GMainWindow::UpdateBootHomeMenuState() {
     for (u32 region = 0; region < Core::NUM_SYSTEM_TITLE_REGIONS; region++) {
         const auto path = Core::GetHomeMenuNcchPath(region);
         ui->menu_Boot_Home_Menu->actions().at(region)->setEnabled(
-            (current_region == Settings::REGION_VALUE_AUTO_SELECT || current_region == region) &&
+            (current_region == Settings::REGION_VALUE_AUTO_SELECT ||
+             current_region == static_cast<int>(region)) &&
             !path.empty() && FileUtil::Exists(path));
     }
 }

src/common/CMakeLists.txt

@@ -131,6 +131,25 @@ add_library(citra_common STATIC
     zstd_compression.h
 )
 
+if (MSVC)
+  target_compile_definitions(citra_common PRIVATE
+    # The standard library doesn't provide any replacement for codecvt yet
+    # so we can disable this deprecation warning for the time being.
+    _SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING
+  )
+  target_compile_options(citra_common PRIVATE
+    /W4
+
+    /we4242 # 'identifier': conversion from 'type1' to 'type2', possible loss of data
+    /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+    /we4800 # Implicit conversion from 'type' to bool. Possible information loss
+  )
+else()
+  target_compile_options(citra_common PRIVATE
+    $<$<CXX_COMPILER_ID:Clang>:-fsized-deallocation>
+  )
+endif()
+
 create_target_directory_groups(citra_common)
 
 target_link_libraries(citra_common PUBLIC fmt::fmt microprofile Boost::boost Boost::serialization Boost::iostreams)

src/common/assert.h

@@ -15,7 +15,7 @@
 #define ASSERT(_a_)                                                                                \
     do                                                                                             \
         if (!(_a_)) [[unlikely]] {                                                                 \
-            []() CITRA_NO_INLINE {                                                                 \
+            []() CITRA_NO_INLINE CITRA_NO_RETURN {                                                 \
                 LOG_CRITICAL(Debug, "Assertion Failed!");                                          \
                 Crash();                                                                           \
                 exit(1);                                                                           \
@@ -26,7 +26,7 @@
 #define ASSERT_MSG(_a_, ...)                                                                       \
     do                                                                                             \
         if (!(_a_)) [[unlikely]] {                                                                 \
-            [&]() CITRA_NO_INLINE {                                                                \
+            [&]() CITRA_NO_INLINE CITRA_NO_RETURN {                                                \
                 LOG_CRITICAL(Debug, "Assertion Failed!\n" __VA_ARGS__);                            \
                 Crash();                                                                           \
                 exit(1);                                                                           \
@@ -35,14 +35,14 @@
     while (0)
 
 #define UNREACHABLE()                                                                              \
-    ([]() CITRA_NO_INLINE {                                                                        \
+    ([]() CITRA_NO_INLINE CITRA_NO_RETURN {                                                        \
         LOG_CRITICAL(Debug, "Unreachable code!");                                                  \
         Crash();                                                                                   \
         exit(1);                                                                                   \
     }())
 
 #define UNREACHABLE_MSG(...)                                                                       \
-    ([&]() CITRA_NO_INLINE {                                                                       \
+    ([&]() CITRA_NO_INLINE CITRA_NO_RETURN {                                                       \
         LOG_CRITICAL(Debug, "Unreachable code!\n" __VA_ARGS__);                                    \
         Crash();                                                                                   \
         exit(1);                                                                                   \

src/common/common_funcs.h

@@ -30,6 +30,12 @@
 #define CITRA_NO_INLINE __attribute__((noinline))
 #endif
 
+#ifdef _MSC_VER
+#define CITRA_NO_RETURN __declspec(noreturn)
+#else
+#define CITRA_NO_RETURN __attribute__((noreturn))
+#endif
+
 #ifdef _MSC_VER
 extern "C" {
 __declspec(dllimport) void __stdcall DebugBreak(void);

src/common/file_util.cpp

@@ -14,6 +14,7 @@
 #include "common/common_paths.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
+#include "common/string_util.h"
 
 #ifdef _WIN32
 #include <windows.h>
@@ -540,7 +541,8 @@ void GetAllFilesFromNestedEntries(FSTEntry& directory, std::vector<FSTEntry>& ou
 }
 
 bool DeleteDirRecursively(const std::string& directory, unsigned int recursion) {
-    const auto callback = [recursion](u64* num_entries_out, const std::string& directory,
+    const auto callback = [recursion]([[maybe_unused]] u64* num_entries_out,
+                                      const std::string& directory,
                                       const std::string& virtual_name) -> bool {
         std::string new_path = directory + DIR_SEP_CHR + virtual_name;
 
@@ -560,7 +562,8 @@ bool DeleteDirRecursively(const std::string& directory, unsigned int recursion)
     return true;
 }
 
-void CopyDir(const std::string& source_path, const std::string& dest_path) {
+void CopyDir([[maybe_unused]] const std::string& source_path,
+             [[maybe_unused]] const std::string& dest_path) {
 #ifndef _WIN32
     if (source_path == dest_path)
         return;
@@ -900,14 +903,14 @@ void SplitFilename83(const std::string& filename, std::array<char, 9>& short_nam
             short_name[7] = '1';
             break;
         }
-        short_name[j++] = toupper(letter);
+        short_name[j++] = Common::ToUpper(letter);
     }
 
     // Get extension.
     if (point != std::string::npos) {
         j = 0;
         for (char letter : filename.substr(point + 1, 3))
-            extension[j++] = toupper(letter);
+            extension[j++] = Common::ToUpper(letter);
     }
 }
 

src/common/logging/backend.cpp

@@ -259,10 +259,10 @@ const char* GetLogClassName(Class log_class) {
 #undef CLS
 #undef SUB
     case Class::Count:
+    default:
         break;
     }
     UNREACHABLE();
-    return "Invalid";
 }
 
 const char* GetLevelName(Level log_level) {
@@ -277,11 +277,11 @@ const char* GetLevelName(Level log_level) {
         LVL(Error);
         LVL(Critical);
     case Level::Count:
+    default:
         break;
     }
 #undef LVL
     UNREACHABLE();
-    return "Invalid";
 }
 
 void AddBackend(std::unique_ptr<Backend> backend) {

src/common/logging/text_formatter.cpp

@@ -111,7 +111,7 @@ void PrintColoredMessage(const Entry& entry) {
 #endif
 }
 
-void PrintMessageToLogcat(const Entry& entry) {
+void PrintMessageToLogcat([[maybe_unused]] const Entry& entry) {
 #ifdef ANDROID
     const auto str = FormatLogMessage(entry);
 

src/common/memory_ref.h

@@ -23,7 +23,7 @@ public:
 
 private:
     template <class Archive>
-    void serialize(Archive& ar, const unsigned int) {}
+    void serialize(Archive&, const unsigned int) {}
     friend class boost::serialization::access;
 };
 

src/common/settings.cpp

@@ -30,7 +30,10 @@ std::string_view GetAudioEmulationName(AudioEmulation emulation) {
         return "LLE";
     case AudioEmulation::LLEMultithreaded:
         return "LLE Multithreaded";
+    default:
+        return "Invalid";
     }
+    UNREACHABLE();
 };
 
 std::string_view GetGraphicsAPIName(GraphicsAPI api) {
@@ -39,7 +42,10 @@ std::string_view GetGraphicsAPIName(GraphicsAPI api) {
         return "Software";
     case GraphicsAPI::OpenGL:
         return "OpenGL";
+    default:
+        return "Invalid";
     }
+    UNREACHABLE();
 }
 
 std::string_view GetTextureFilterName(TextureFilter filter) {
@@ -56,7 +62,10 @@ std::string_view GetTextureFilterName(TextureFilter filter) {
         return "ScaleForce";
     case TextureFilter::xBRZ:
         return "xBRZ";
+    default:
+        return "Invalid";
     }
+    UNREACHABLE();
 }
 
 } // Anonymous namespace

src/common/settings.h

@@ -453,9 +453,9 @@ struct Values {
     Setting<u16> custom_bottom_bottom{480, "custom_bottom_bottom"};
     Setting<u16> custom_second_layer_opacity{100, "custom_second_layer_opacity"};
 
-    SwitchableSetting<double> bg_red{0.f, "bg_red"};
+    SwitchableSetting<float> bg_red{0.f, "bg_red"};
-    SwitchableSetting<double> bg_green{0.f, "bg_green"};
+    SwitchableSetting<float> bg_green{0.f, "bg_green"};
-    SwitchableSetting<double> bg_blue{0.f, "bg_blue"};
+    SwitchableSetting<float> bg_blue{0.f, "bg_blue"};
 
     SwitchableSetting<StereoRenderOption> render_3d{StereoRenderOption::Off, "render_3d"};
     SwitchableSetting<u32> factor_3d{0, "factor_3d"};

src/common/string_util.cpp

@@ -20,17 +20,27 @@
 
 namespace Common {
 
+/// Make a char lowercase
+char ToLower(char c) {
+    return static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
+}
+
+/// Make a char uppercase
+char ToUpper(char c) {
+    return static_cast<char>(std::toupper(static_cast<unsigned char>(c)));
+}
+
 /// Make a string lowercase
 std::string ToLower(std::string str) {
     std::transform(str.begin(), str.end(), str.begin(),
-                   [](unsigned char c) { return std::tolower(c); });
+                   [](unsigned char c) { return static_cast<char>(std::tolower(c)); });
     return str;
 }
 
 /// Make a string uppercase
 std::string ToUpper(std::string str) {
     std::transform(str.begin(), str.end(), str.begin(),
-                   [](unsigned char c) { return std::toupper(c); });
+                   [](unsigned char c) { return static_cast<char>(std::toupper(c)); });
     return str;
 }
 

src/common/string_util.h

@@ -14,6 +14,12 @@
 
 namespace Common {
 
+/// Make a char lowercase
+[[nodiscard]] char ToLower(char c);
+
+/// Make a char uppercase
+[[nodiscard]] char ToUpper(char c);
+
 /// Make a string lowercase
 [[nodiscard]] std::string ToLower(std::string str);
 

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

@@ -144,21 +144,21 @@ void LayeredFS::LoadRelocations() {
         return;
     }
 
-    const FileUtil::DirectoryEntryCallable callback = [this,
+    const FileUtil::DirectoryEntryCallable callback =
-                                                       &callback](u64* /*num_entries_out*/,
+        [this, &callback]([[maybe_unused]] u64* num_entries_out, const std::string& directory,
-                                                                  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);
+                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>();
+                    auto child_dir = std::make_unique<Directory>();
-                directory->name = virtual_name;
+                    child_dir->name = virtual_name;
-                directory->path = path;
+                    child_dir->path = path;
-                directory->parent = parent;
+                    child_dir->parent = parent;
-                directory_path_map.emplace(path, directory.get());
+                    directory_path_map.emplace(path, child_dir.get());
-                parent->directories.emplace_back(std::move(directory));
+                    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,

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,
+Loader::ResultStatus NCCHContainer::OpenFile(const std::string& filepath_, u32 ncch_offset_,
-                                             u32 partition) {
+                                             u32 partition_) {
-    this->filepath = filepath;
+    filepath = filepath_;
-    this->ncch_offset = ncch_offset;
+    ncch_offset = ncch_offset_;
-    this->partition = partition;
+    partition = partition_;
-    file = FileUtil::IOFile(filepath, "rb");
+    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"};
+        FileUtil::IOFile patch_file{info.path, "rb"};
-        if (!file)
+        if (!patch_file)
             continue;
 
-        std::vector<u8> patch(file.GetSize());
+        std::vector<u8> patch(patch_file.GetSize());
-        if (file.ReadBytes(patch.data(), patch.size()) != patch.size())
+        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) {
+    virtual void Setup(const MiiSelectorConfig& config_) {
-        this->config = 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) {
+void DefaultKeyboard::Execute(const Frontend::KeyboardConfig& config_) {
-    SoftwareKeyboard::Execute(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) {
+    virtual void Execute(const KeyboardConfig& config_) {
-        this->config = 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(
+    // If in portrait mode, only the MobilePortrait option really makes sense
-        layout_option.GetValue(), Settings::values.upright_screen.GetValue());
+    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 +
+                    height =
-                              Core::kScreenTopWidth /
+                        (Core::kScreenBottomWidth +
-                                  Settings::values.large_screen_proportion.GetValue()) *
+                         static_cast<int>(Core::kScreenTopWidth /
+                                          Settings::values.large_screen_proportion.GetValue())) *
                         res_scale;
                 } else {
                     width = Core::kScreenTopHeight * res_scale;
-                    height = (Core::kScreenTopWidth +
+                    height =
-                              Core::kScreenBottomWidth /
+                        (Core::kScreenTopWidth +
-                                  Settings::values.large_screen_proportion.GetValue()) *
+                         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) {
+    void SetName(const std::string& name_) {
-        this->name = 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) {
+        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

@@ -157,15 +157,17 @@ 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,
+            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
     VAddr interval_target = target_address;

src/core/hle/kernel/shared_memory.h

@@ -28,8 +28,8 @@ public:
     std::string GetName() const override {
         return name;
     }
-    void SetName(std::string name) {
+    void SetName(std::string name_) {
-        this->name = std::move(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) {
+    void SetCPU(ARM_Interface& cpu_) {
-        this->cpu = &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 (u32 y = 0; y < height; y++) {
-        for (auto x = 0; x < screen_width; x++) {
+        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) {
+        for (std::size_t j = 0; j < info.username.size(); ++j) {
-            node.username[i] = info.username[i];
+            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,
+[[maybe_unused]] static std::vector<u8> DecryptDataFrame(
-                                        const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
+    const std::vector<u8>& encrypted_payload,
-                                        const MacAddress& sender, const MacAddress& receiver,
+    const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key, const MacAddress& sender,
-                                        const MacAddress& bssid, u16 sequence_number,
+    const MacAddress& receiver, const MacAddress& bssid, u16 sequence_number, u16 frame_control) {
-                                        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,
+[[maybe_unused]] static std::vector<u8> EncryptDataFrame(
-                                        const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
+    const std::vector<u8>& payload, const std::array<u8, CryptoPP::AES::BLOCKSIZE>& ccmp_key,
-                                        const MacAddress& sender, const MacAddress& receiver,
+    const MacAddress& sender, const MacAddress& receiver, const MacAddress& bssid,
-                                        const MacAddress& bssid, u16 sequence_number,
+    u16 sequence_number, u16 frame_control) {
-                                        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));
-
+    }
     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));
-
+    }
     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);
         }
     }
 

src/dedicated_room/citra-room.cpp

@@ -178,7 +178,7 @@ int main(int argc, char** argv) {
     std::string ban_list_file;
     std::string log_file = "citra-room.log";
     u64 preferred_game_id = 0;
-    u32 port = Network::DefaultRoomPort;
+    u16 port = Network::DefaultRoomPort;
     u32 max_members = 16;
     bool enable_citra_mods = false;
 
@@ -212,7 +212,7 @@ int main(int argc, char** argv) {
                 room_description.assign(optarg);
                 break;
             case 'p':
-                port = strtoul(optarg, &endarg, 0);
+                port = static_cast<u16>(strtoul(optarg, &endarg, 0));
                 break;
             case 'm':
                 max_members = strtoul(optarg, &endarg, 0);

src/input_common/sdl/sdl_impl.cpp

@@ -1007,14 +1007,14 @@ public:
                             // event was press and the second was release; This should handle most
                             // digital axes while deferring to the direction of travel for analog
                             // axes
-                            event.jaxis.value = std::copysign(
+                            event.jaxis.value = static_cast<Sint16>(std::copysign(
-                                32767, axis_memory[event.jaxis.which][event.jaxis.axis]);
+                                32767, axis_memory[event.jaxis.which][event.jaxis.axis]));
                         } else {
                             // There are more than two events, so this is likely a true analog axis,
                             // check the direction it travelled
-                            event.jaxis.value = std::copysign(
+                            event.jaxis.value = static_cast<Sint16>(std::copysign(
                                 32767, event.jaxis.value -
-                                           axis_memory[event.jaxis.which][event.jaxis.axis]);
+                                           axis_memory[event.jaxis.which][event.jaxis.axis]));
                         }
                         axis_memory.clear();
                         axis_event_count.clear();

src/input_common/udp/client.cpp

@@ -234,8 +234,6 @@ CalibrationConfigurationJob::CalibrationConfigurationJob(
     std::function<void(u16, u16, u16, u16)> data_callback) {
 
     std::thread([=, this] {
-        constexpr u16 CALIBRATION_THRESHOLD = 100;
-
         u16 min_x{UINT16_MAX};
         u16 min_y{UINT16_MAX};
         u16 max_x{};
@@ -244,6 +242,8 @@ CalibrationConfigurationJob::CalibrationConfigurationJob(
         Status current_status{Status::Initialized};
         SocketCallback callback{[](Response::Version version) {}, [](Response::PortInfo info) {},
                                 [&](Response::PadData data) {
+                                    constexpr u16 CALIBRATION_THRESHOLD = 100;
+
                                     if (current_status == Status::Initialized) {
                                         // Receiving data means the communication is ready now
                                         current_status = Status::Ready;

src/network/announce_multiplayer_session.cpp

@@ -135,9 +135,9 @@ void AnnounceMultiplayerSession::AnnounceMultiplayerLoop() {
         if (result.result_string == "404") {
             registered = false;
             // Needs to register the room again
-            Common::WebResult result = Register();
+            Common::WebResult new_result = Register();
-            if (result.result_code != Common::WebResult::Code::Success) {
+            if (new_result.result_code != Common::WebResult::Code::Success) {
-                ErrorCallback(result);
+                ErrorCallback(new_result);
             }
         }
     }

src/network/room_member.cpp

@@ -158,7 +158,7 @@ bool RoomMember::RoomMemberImpl::IsConnected() const {
 void RoomMember::RoomMemberImpl::MemberLoop() {
     // Receive packets while the connection is open
     while (IsConnected()) {
-        std::lock_guard lock(network_mutex);
+        std::lock_guard network_lock(network_mutex);
         ENetEvent event;
         if (enet_host_service(client, &event, 16) > 0) {
             switch (event.type) {
@@ -255,7 +255,7 @@ void RoomMember::RoomMemberImpl::MemberLoop() {
 
         std::list<Packet> packets;
         {
-            std::lock_guard lock(send_list_mutex);
+            std::lock_guard send_list_lock(send_list_mutex);
             packets.swap(send_list);
         }
         for (const auto& packet : packets) {

src/tests/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_executable(tests
     common/bit_field.cpp
+    common/file_util.cpp
     common/param_package.cpp
     core/arm/arm_test_common.cpp
     core/arm/arm_test_common.h

src/tests/common/file_util.cpp

@@ -0,0 +1,26 @@
+// Copyright 2023 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <string>
+
+#include <catch2/catch_test_macros.hpp>
+
+#include "common/file_util.h"
+#include "common/string_util.h"
+
+TEST_CASE("SplitFilename83 Sanity", "[common]") {
+    std::string filename = "long_ass_file_name.3ds";
+    std::array<char, 9> short_name;
+    std::array<char, 4> extension;
+
+    FileUtil::SplitFilename83(filename, short_name, extension);
+
+    filename = Common::ToUpper(filename);
+    std::string expected_short_name = filename.substr(0, 6).append("~1");
+    std::string expected_extension = filename.substr(filename.find('.') + 1, 3);
+
+    REQUIRE(memcmp(short_name.data(), expected_short_name.data(), short_name.size()) == 0);
+    REQUIRE(memcmp(extension.data(), expected_extension.data(), extension.size()) == 0);
+}

src/tests/core/memory/vm_manager.cpp

@@ -81,10 +81,12 @@ TEST_CASE("Memory Basics", "[kernel][memory]") {
                                       Kernel::MemoryState::Private);
         REQUIRE(result.Code() == RESULT_SUCCESS);
 
+        SECTION("reprotect memory range") {
             ResultCode code =
                 manager->ReprotectRange(Memory::HEAP_VADDR, static_cast<u32>(block.GetSize()),
                                         Kernel::VMAPermission::ReadWrite);
             REQUIRE(code == RESULT_SUCCESS);
+        }
 
         SECTION("with invalid address") {
             ResultCode code = manager->ChangeMemoryState(
@@ -146,7 +148,8 @@ TEST_CASE("Memory Basics", "[kernel][memory]") {
             CHECK(vma->second.meminfo_state == Kernel::MemoryState::Private);
         }
 
-        code = manager->UnmapRange(Memory::HEAP_VADDR, static_cast<u32>(block.GetSize()));
+        ResultCode code =
+            manager->UnmapRange(Memory::HEAP_VADDR, static_cast<u32>(block.GetSize()));
         REQUIRE(code == RESULT_SUCCESS);
     }
 }

src/video_core/custom_textures/custom_tex_manager.cpp

@@ -290,14 +290,14 @@ bool CustomTexManager::Decode(Material* material, std::function<bool()>&& upload
 
 void CustomTexManager::ReadConfig(const std::string& load_path) {
     const std::string config_path = load_path + "pack.json";
-    FileUtil::IOFile file{config_path, "r"};
+    FileUtil::IOFile config_file{config_path, "r"};
-    if (!file.IsOpen()) {
+    if (!config_file.IsOpen()) {
         LOG_INFO(Render, "Unable to find pack config file, using legacy defaults");
         refuse_dds = true;
         return;
     }
-    std::string config(file.GetSize(), '\0');
+    std::string config(config_file.GetSize(), '\0');
-    const std::size_t read_size = file.ReadBytes(config.data(), config.size());
+    const std::size_t read_size = config_file.ReadBytes(config.data(), config.size());
     if (!read_size) {
         return;
     }

src/video_core/pica.cpp

@@ -40,7 +40,7 @@ void Zero(T& o) {
 State::State() : geometry_pipeline(*this) {
     auto SubmitVertex = [this](const Shader::AttributeBuffer& vertex) {
         using Pica::Shader::OutputVertex;
-        auto AddTriangle = [this](const OutputVertex& v0, const OutputVertex& v1,
+        auto AddTriangle = [](const OutputVertex& v0, const OutputVertex& v1,
                               const OutputVertex& v2) {
             VideoCore::g_renderer->Rasterizer()->AddTriangle(v0, v1, v2);
         };

src/video_core/rasterizer_accelerated.cpp

@@ -679,7 +679,8 @@ void RasterizerAccelerated::SyncProcTexBias() {
 }
 
 void RasterizerAccelerated::SyncAlphaTest() {
-    if (regs.framebuffer.output_merger.alpha_test.ref != uniform_block_data.data.alphatest_ref) {
+    if (regs.framebuffer.output_merger.alpha_test.ref !=
+        static_cast<u32>(uniform_block_data.data.alphatest_ref)) {
         uniform_block_data.data.alphatest_ref = regs.framebuffer.output_merger.alpha_test.ref;
         uniform_block_data.dirty = true;
     }

src/video_core/rasterizer_cache/rasterizer_cache.h

@@ -31,7 +31,7 @@ enum class ScaleMatch {
 };
 
 class CustomTexManager;
-struct CustomTexture;
+class CustomTexture;
 class RendererBase;
 
 class RasterizerCache : NonCopyable {

src/video_core/rasterizer_cache/texture_codec.h

@@ -161,7 +161,7 @@ constexpr void EncodePixel(const u8* source, u8* dest) {
     } else if constexpr (format == PixelFormat::D24 && converted) {
         float d32;
         std::memcpy(&d32, source, sizeof(d32));
-        EncodeD24(d32 * 0xFFFFFF, dest);
+        EncodeD24(static_cast<u32>(d32 * 0xFFFFFF), dest);
     } else if constexpr (format == PixelFormat::D24S8) {
         const u32 s8d24 = std::rotr(MakeInt<u32>(source), 8);
         std::memcpy(dest, &s8d24, sizeof(u32));

src/video_core/rasterizer_interface.h

@@ -59,34 +59,37 @@ public:
     virtual void ClearAll(bool flush) = 0;
 
     /// Attempt to use a faster method to perform a display transfer with is_texture_copy = 0
-    virtual bool AccelerateDisplayTransfer(const GPU::Regs::DisplayTransferConfig& config) {
+    virtual bool AccelerateDisplayTransfer(
+        [[maybe_unused]] const GPU::Regs::DisplayTransferConfig& config) {
         return false;
     }
 
     /// Attempt to use a faster method to perform a display transfer with is_texture_copy = 1
-    virtual bool AccelerateTextureCopy(const GPU::Regs::DisplayTransferConfig& config) {
+    virtual bool AccelerateTextureCopy(
+        [[maybe_unused]] const GPU::Regs::DisplayTransferConfig& config) {
         return false;
     }
 
     /// Attempt to use a faster method to fill a region
-    virtual bool AccelerateFill(const GPU::Regs::MemoryFillConfig& config) {
+    virtual bool AccelerateFill([[maybe_unused]] const GPU::Regs::MemoryFillConfig& config) {
         return false;
     }
 
     /// Attempt to use a faster method to display the framebuffer to screen
-    virtual bool AccelerateDisplay(const GPU::Regs::FramebufferConfig& config,
+    virtual bool AccelerateDisplay([[maybe_unused]] const GPU::Regs::FramebufferConfig& config,
-                                   PAddr framebuffer_addr, u32 pixel_stride,
+                                   [[maybe_unused]] PAddr framebuffer_addr,
-                                   OpenGL::ScreenInfo& screen_info) {
+                                   [[maybe_unused]] u32 pixel_stride,
+                                   [[maybe_unused]] OpenGL::ScreenInfo& screen_info) {
         return false;
     }
 
     /// Attempt to draw using hardware shaders
-    virtual bool AccelerateDrawBatch(bool is_indexed) {
+    virtual bool AccelerateDrawBatch([[maybe_unused]] bool is_indexed) {
         return false;
     }
 
-    virtual void LoadDiskResources(const std::atomic_bool& stop_loading,
+    virtual void LoadDiskResources([[maybe_unused]] const std::atomic_bool& stop_loading,
-                                   const DiskResourceLoadCallback& callback) {}
+                                   [[maybe_unused]] const DiskResourceLoadCallback& callback) {}
 
     virtual void SyncEntireState() {}
 };

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -413,10 +413,10 @@ bool RasterizerOpenGL::Draw(bool accelerate, bool is_indexed) {
 
     // Sync the viewport
     const auto viewport = framebuffer.Viewport();
-    state.viewport.x = viewport.x;
+    state.viewport.x = static_cast<GLint>(viewport.x);
-    state.viewport.y = viewport.y;
+    state.viewport.y = static_cast<GLint>(viewport.y);
-    state.viewport.width = viewport.width;
+    state.viewport.width = static_cast<GLsizei>(viewport.width);
-    state.viewport.height = viewport.height;
+    state.viewport.height = static_cast<GLsizei>(viewport.height);
 
     // Viewport can have negative offsets or larger dimensions than our framebuffer sub-rect.
     // Enable scissor test to prevent drawing outside of the framebuffer region
@@ -427,7 +427,7 @@ bool RasterizerOpenGL::Draw(bool accelerate, bool is_indexed) {
     state.scissor.width = draw_rect.GetWidth();
     state.scissor.height = draw_rect.GetHeight();
 
-    const u32 res_scale = framebuffer.ResolutionScale();
+    const int res_scale = static_cast<int>(framebuffer.ResolutionScale());
     if (uniform_block_data.data.framebuffer_scale != res_scale) {
         uniform_block_data.data.framebuffer_scale = res_scale;
         uniform_block_data.dirty = true;

src/video_core/renderer_software/sw_framebuffer.cpp

@@ -398,8 +398,8 @@ void DrawShadowMapPixel(int x, int y, u32 depth, u8 stencil) {
         } else {
             float16 constant = float16::FromRaw(shadow.constant);
             float16 linear = float16::FromRaw(shadow.linear);
-            float16 x = float16::FromFloat32(static_cast<float>(depth) / ref_z);
+            float16 x_ = float16::FromFloat32(static_cast<float>(depth) / ref_z);
-            float16 stencil_new = float16::FromFloat32(stencil) / (constant + linear * x);
+            float16 stencil_new = float16::FromFloat32(stencil) / (constant + linear * x_);
             stencil = static_cast<u8>(std::clamp(stencil_new.ToFloat32(), 0.0f, 255.0f));
 
             if (stencil < ref_s)

src/video_core/shader/shader_interpreter.cpp

@@ -456,7 +456,7 @@ static void RunInterpreter(const ShaderSetup& setup, UnitState& state, DebugData
         case OpCode::Type::MultiplyAdd: {
             if ((instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MAD) ||
                 (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MADI)) {
-                const SwizzlePattern& swizzle = *reinterpret_cast<const SwizzlePattern*>(
+                const SwizzlePattern& mad_swizzle = *reinterpret_cast<const SwizzlePattern*>(
                     &swizzle_data[instr.mad.operand_desc_id]);
 
                 bool is_inverted = (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MADI);
@@ -472,15 +472,15 @@ static void RunInterpreter(const ShaderSetup& setup, UnitState& state, DebugData
                 const float24* src3_ = LookupSourceRegister(instr.mad.GetSrc3(is_inverted) +
                                                             (is_inverted * address_offset));
 
-                const bool negate_src1 = ((bool)swizzle.negate_src1 != false);
+                const bool negate_src1 = ((bool)mad_swizzle.negate_src1 != false);
-                const bool negate_src2 = ((bool)swizzle.negate_src2 != false);
+                const bool negate_src2 = ((bool)mad_swizzle.negate_src2 != false);
-                const bool negate_src3 = ((bool)swizzle.negate_src3 != false);
+                const bool negate_src3 = ((bool)mad_swizzle.negate_src3 != false);
 
                 float24 src1[4] = {
-                    src1_[(int)swizzle.src1_selector_0.Value()],
+                    src1_[(int)mad_swizzle.src1_selector_0.Value()],
-                    src1_[(int)swizzle.src1_selector_1.Value()],
+                    src1_[(int)mad_swizzle.src1_selector_1.Value()],
-                    src1_[(int)swizzle.src1_selector_2.Value()],
+                    src1_[(int)mad_swizzle.src1_selector_2.Value()],
-                    src1_[(int)swizzle.src1_selector_3.Value()],
+                    src1_[(int)mad_swizzle.src1_selector_3.Value()],
                 };
                 if (negate_src1) {
                     src1[0] = -src1[0];
@@ -489,10 +489,10 @@ static void RunInterpreter(const ShaderSetup& setup, UnitState& state, DebugData
                     src1[3] = -src1[3];
                 }
                 float24 src2[4] = {
-                    src2_[(int)swizzle.src2_selector_0.Value()],
+                    src2_[(int)mad_swizzle.src2_selector_0.Value()],
-                    src2_[(int)swizzle.src2_selector_1.Value()],
+                    src2_[(int)mad_swizzle.src2_selector_1.Value()],
-                    src2_[(int)swizzle.src2_selector_2.Value()],
+                    src2_[(int)mad_swizzle.src2_selector_2.Value()],
-                    src2_[(int)swizzle.src2_selector_3.Value()],
+                    src2_[(int)mad_swizzle.src2_selector_3.Value()],
                 };
                 if (negate_src2) {
                     src2[0] = -src2[0];
@@ -501,10 +501,10 @@ static void RunInterpreter(const ShaderSetup& setup, UnitState& state, DebugData
                     src2[3] = -src2[3];
                 }
                 float24 src3[4] = {
-                    src3_[(int)swizzle.src3_selector_0.Value()],
+                    src3_[(int)mad_swizzle.src3_selector_0.Value()],
-                    src3_[(int)swizzle.src3_selector_1.Value()],
+                    src3_[(int)mad_swizzle.src3_selector_1.Value()],
-                    src3_[(int)swizzle.src3_selector_2.Value()],
+                    src3_[(int)mad_swizzle.src3_selector_2.Value()],
-                    src3_[(int)swizzle.src3_selector_3.Value()],
+                    src3_[(int)mad_swizzle.src3_selector_3.Value()],
                 };
                 if (negate_src3) {
                     src3[0] = -src3[0];
@@ -525,7 +525,7 @@ static void RunInterpreter(const ShaderSetup& setup, UnitState& state, DebugData
                 Record<DebugDataRecord::SRC3>(debug_data, iteration, src3);
                 Record<DebugDataRecord::DEST_IN>(debug_data, iteration, dest);
                 for (int i = 0; i < 4; ++i) {
-                    if (!swizzle.DestComponentEnabled(i))
+                    if (!mad_swizzle.DestComponentEnabled(i))
                         continue;
 
                     dest[i] = src1[i] * src2[i] + src3[i];