Fixes from clang-tidy-19 that didn't make it for the last release.

src/common/HighScoresManager.cxx

@@ -381,8 +381,7 @@ string HighScoresManager::formattedScore(Int32 score, Int32 width) const
 
   if(scoreBCD(jprops))
   {
-    if(width > digits)
-      digits = width;
+    digits = std::max(width, digits);
     buf << std::setw(digits) << std::setfill(' ') << score;
   }
   else {

src/common/JoyMap.cxx

@@ -188,8 +188,7 @@ json JoyMap::saveMapping(EventMode mode) const
   using MapType = std::pair<JoyMapping, Event::Type>;
   std::vector<MapType> sortedMap(myMap.begin(), myMap.end());
 
-  std::sort(sortedMap.begin(), sortedMap.end(),
-      [](const MapType& a, const MapType& b)
+  std::ranges::sort(sortedMap, [](const MapType& a, const MapType& b)
     {
       // Event::Type first
       if(a.first.button != b.first.button)
@@ -285,17 +284,17 @@ int JoyMap::loadMapping(const json& eventMappings, EventMode mode)
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-json JoyMap::convertLegacyMapping(string list)
+json JoyMap::convertLegacyMapping(string lst)
 {
   json eventMappings = json::array();
 
   // Since istringstream swallows whitespace, we have to make the
   // delimiters be spaces
-  std::replace(list.begin(), list.end(), '|', ' ');
-  std::replace(list.begin(), list.end(), ':', ' ');
-  std::replace(list.begin(), list.end(), ',', ' ');
+  std::ranges::replace(lst, '|', ' ');
+  std::ranges::replace(lst, ':', ' ');
+  std::ranges::replace(lst, ',', ' ');
 
-  istringstream buf(list);
+  istringstream buf(lst);
   int event = 0, button = 0, axis = 0, adir = 0, hat = 0, hdir = 0;
 
   while(buf >> event && buf >> button

src/common/JoyMap.hxx

@@ -112,7 +112,7 @@ class JoyMap
     nlohmann::json saveMapping(EventMode mode) const;
     int loadMapping(const nlohmann::json& eventMappings, EventMode mode);
 
-    static nlohmann::json convertLegacyMapping(string list);
+    static nlohmann::json convertLegacyMapping(string lst);
 
     /** Erase all mappings for given mode */
     void eraseMode(EventMode mode);

src/common/KeyMap.cxx

@@ -222,8 +222,7 @@ json KeyMap::saveMapping(EventMode mode) const
   using MapType = std::pair<Mapping, Event::Type>;
   std::vector<MapType> sortedMap(myMap.begin(), myMap.end());
 
-  std::sort(sortedMap.begin(), sortedMap.end(),
-            [](const MapType& a, const MapType& b)
+  std::ranges::sort(sortedMap, [](const MapType& a, const MapType& b)
   {
     // Event::Type first
     if(a.first.key != b.first.key)
@@ -290,11 +289,11 @@ json KeyMap::convertLegacyMapping(string_view lm)
 
   // Since istringstream swallows whitespace, we have to make the
   // delimiters be spaces
-  string list{lm};
-  std::replace(list.begin(), list.end(), '|', ' ');
-  std::replace(list.begin(), list.end(), ':', ' ');
-  std::replace(list.begin(), list.end(), ',', ' ');
-  istringstream buf(list);
+  string lst{lm};
+  std::ranges::replace(lst, '|', ' ');
+  std::ranges::replace(lst, ':', ' ');
+  std::ranges::replace(lst, ',', ' ');
+  istringstream buf(lst);
   int event = 0, key = 0, mod = 0;
 
   while(buf >> event && buf >> key && buf >> mod)

src/common/PaletteHandler.cxx

@@ -478,9 +478,9 @@ void PaletteHandler::generateCustomPalette(ConsoleTiming timing) const
         float G = Y + dotProduct(IQ[chroma], IQG);
         float B = Y + dotProduct(IQ[chroma], IQB);
 
-        if(R < 0) R = 0;
-        if(G < 0) G = 0;
-        if(B < 0) B = 0;
+        R = std::max(R, 0.F);
+        G = std::max(G, 0.F);
+        B = std::max(B, 0.F);
 
         R = powf(R, 0.9F);
         G = powf(G, 0.9F);

src/common/PhysicalJoystick.cxx

@@ -112,26 +112,26 @@ json PhysicalJoystick::convertLegacyMapping(string_view mapping, string_view nam
 {
   istringstream buf(string{mapping});  // TODO: fixed in C++23
   json convertedMapping = json::object();
-  string map;
+  string lmap;
 
   // Skip joystick name
-  getline(buf, map, MODE_DELIM);
+  getline(buf, lmap, MODE_DELIM);
 
-  while (getline(buf, map, MODE_DELIM))
+  while (getline(buf, lmap, MODE_DELIM))
   {
     int mode{0};
 
     // Get event mode
-    std::replace(map.begin(), map.end(), '|', ' ');
-    istringstream modeBuf(map);
+    std::ranges::replace(lmap, '|', ' ');
+    istringstream modeBuf(lmap);
     modeBuf >> mode;
 
     // Remove leading "<mode>|" string
-    map.erase(0, 2);
+    lmap.erase(0, 2);
 
-    const json mappingForMode = JoyMap::convertLegacyMapping(map);
+    const json lmappingForMode = JoyMap::convertLegacyMapping(lmap);
 
-    convertedMapping[jsonName(static_cast<EventMode>(mode))] = mappingForMode;
+    convertedMapping[jsonName(static_cast<EventMode>(mode))] = lmappingForMode;
   }
 
   convertedMapping["name"] = name;

src/common/SoundSDL2.cxx

@@ -479,7 +479,7 @@ void SoundSDL2::WavHandlerSDL2::processWav(uInt8* stream, uInt32 len)
       const int newFreq =
         std::round(static_cast<double>(mySpec.freq) * origLen / len);
 
-      if(len > myRemaining)
+      if(len > myRemaining)  // NOLINT(readability-use-std-min-max)
         len = myRemaining;
 
       SDL_AudioCVT cvt;
@@ -505,7 +505,7 @@ void SoundSDL2::WavHandlerSDL2::processWav(uInt8* stream, uInt32 len)
     }
     else
     {
-      if(len > myRemaining)
+      if(len > myRemaining)  // NOLINT(readability-use-std-min-max)
         len = myRemaining;
 
       // Mix volume adjusted WAV data into silent buffer

src/common/Version.hxx

@@ -18,7 +18,7 @@
 #ifndef VERSION_HXX
 #define VERSION_HXX
 
-#define STELLA_VERSION "7.0"
+#define STELLA_VERSION "7.1_pre"
 #define STELLA_BUILD "8005"
 
 #endif

src/common/ZipHandler.cxx

@@ -266,8 +266,7 @@ void ZipHandler::ZipFile::readEcd()
     uInt64 read_length = 0;
 
     // Max out the buf length at the size of the file
-    if(buflen > myLength)
-      buflen = myLength;
+    buflen = std::min(buflen, myLength);
 
     // Allocate buffer
     const ByteBuffer buffer = make_unique<uInt8[]>(buflen + 1);

src/common/bspf.hxx

@@ -56,6 +56,7 @@ using uInt64 = uint64_t;
 #include <cstdio>
 #include <ctime>
 #include <numbers>
+#include <ranges>
 #include <utility>
 #include <vector>
 #include <optional>
@@ -189,12 +190,12 @@ namespace BSPF
   // Convert string to given case
   inline const string& toUpperCase(string& s)
   {
-    transform(s.begin(), s.end(), s.begin(), ::toupper);
+    std::ranges::transform(s, s.begin(), ::toupper);
     return s;
   }
   inline const string& toLowerCase(string& s)
   {
-    transform(s.begin(), s.end(), s.begin(), ::tolower);
+    std::ranges::transform(s, s.begin(), ::tolower);
     return s;
   }
 
@@ -426,9 +427,9 @@ namespace BSPF
     const auto currtime = std::time(nullptr);
     std::tm tm_snapshot{};
   #if (defined BSPF_WINDOWS || defined __WIN32__) && (!defined __GNUG__ || defined __MINGW32__)
-    localtime_s(&tm_snapshot, &currtime);
+    std::ignore = localtime_s(&tm_snapshot, &currtime);
   #else
-    localtime_r(&currtime, &tm_snapshot);
+    std::ignore = localtime_r(&currtime, &tm_snapshot);
   #endif
     return tm_snapshot;
   }

src/common/main.cxx

@@ -40,6 +40,8 @@
   #include "CheatManager.hxx"
 #endif
 
+namespace {
+
 /**
   Parse the commandline arguments and store into the appropriate hashmap.
 
@@ -47,39 +49,6 @@
   Some keys are used only by the main function; these are placed in localOpts.
   The rest are needed globally, and are placed in globalOpts.
 */
-void parseCommandLine(int ac, const char* const av[],
-    Settings::Options& globalOpts, Settings::Options& localOpts);
-
-/**
-  Checks the commandline for special settings that are used by various ports
-  to use a specific 'base directory'.
-
-  This needs to be done separately, before either an OSystem or Settings
-  object can be created, since they both depend on each other, and a
-  variable basedir implies a different location for the settings file.
-
-  This function will call OSystem::overrideBaseDir() when either of the
-  applicable arguments are found, and then remove them from the argument
-  list.
-*/
-void checkForCustomBaseDir(Settings::Options& options);
-
-/**
-  Checks whether the commandline contains an argument corresponding to
-  starting a profile session.
-*/
-bool isProfilingRun(int ac, char* av[]);
-
-/**
-  In Windows, attach console to allow command line output (e.g. for -help).
-  This is needed since by default Windows doesn't set up stdout/stderr
-  correctly.
-*/
-void attachConsole();
-void freeConsole();
-
-
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void parseCommandLine(int ac, const char* const av[],
     Settings::Options& globalOpts, Settings::Options& localOpts)
 {
@@ -136,7 +105,18 @@ void parseCommandLine(int ac, const char* const av[],
 #endif
 }
 
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+/**
+  Checks the commandline for special settings that are used by various ports
+  to use a specific 'base directory'.
+
+  This needs to be done separately, before either an OSystem or Settings
+  object can be created, since they both depend on each other, and a
+  variable basedir implies a different location for the settings file.
+
+  This function will call OSystem::overrideBaseDir() when either of the
+  applicable arguments are found, and then remove them from the argument
+  list.
+*/
 void checkForCustomBaseDir(Settings::Options& options)
 {
   // If both of these are activated, the 'base in app dir' takes precedence
@@ -150,14 +130,22 @@ void checkForCustomBaseDir(Settings::Options& options)
   }
 }
 
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-bool isProfilingRun(int ac, char* av[]) {
+/**
+  Checks whether the commandline contains an argument corresponding to
+  starting a profile session.
+*/
+bool isProfilingRun(int ac, char* av[])
+{
   if (ac <= 1) return false;
 
   return string(av[1]) == "-profile";
 }
 
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+/**
+  In Windows, attach console to allow command line output (e.g. for -help).
+  This is needed since by default Windows doesn't set up stdout/stderr
+  correctly.
+*/
 void attachConsole()
 {
 #if defined(BSPF_WINDOWS)
@@ -183,7 +171,6 @@ void attachConsole()
 #endif
 }
 
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void freeConsole()
 {
 #if defined(BSPF_WINDOWS)
@@ -192,6 +179,9 @@ void freeConsole()
 #endif
 }
 
+} // namespace
+
+
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 #if defined(BSPF_MACOS)
 int stellaMain(int ac, char* av[])

src/common/repository/KeyValueRepositoryFile.hxx

@@ -28,12 +28,14 @@
 template<typename T>
 class KeyValueRepositoryFile : public KeyValueRepository {
   public:
-    explicit KeyValueRepositoryFile(const FSNode& node);
-
     KVRMap load() override;
 
     bool save(const KVRMap& values) override;
 
+  private:
+    explicit KeyValueRepositoryFile(const FSNode& node);
+    friend T;
+
   protected:
 
     const FSNode& myNode;  // NOLINT: we want a reference here

src/common/tv_filters/NTSCFilter.cxx

@@ -19,8 +19,10 @@
 
 #include "NTSCFilter.hxx"
 
+namespace {
   constexpr float scaleFrom100(float x) { return (x / 50.F) - 1.F;     }
   constexpr uInt32 scaleTo100(float x)  { return static_cast<uInt32>(50.0001F * (x + 1.F)); }
+} // namespace
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 string NTSCFilter::setPreset(Preset preset)

src/debugger/Debugger.cxx

@@ -793,8 +793,8 @@ bool Debugger::addFunction(string_view name, string_view definition,
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool Debugger::isBuiltinFunction(string_view name)
 {
-  return std::any_of(ourBuiltinFunctions.cbegin(), ourBuiltinFunctions.cend(),
-      [&](const auto& func) { return name == func.name; });
+  return std::ranges::any_of(ourBuiltinFunctions,
+      [&name](const auto& func) { return name == func.name; });
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -845,10 +845,8 @@ string Debugger::builtinHelp()
   // Get column widths for aligned output (functions)
   for(const auto& func: ourBuiltinFunctions)
   {
-    size_t len = func.name.size();
-    if(len > c_maxlen)  c_maxlen = len;
-    len = func.defn.size();
-    if(len > i_maxlen)  i_maxlen = len;
+    c_maxlen = std::max(func.name.size(), c_maxlen);
+    i_maxlen = std::max(func.defn.size(), i_maxlen);
   }
 
   buf << std::setfill(' ') << "\nBuilt-in functions:\n";
@@ -865,10 +863,7 @@ string Debugger::builtinHelp()
   // Get column widths for aligned output (pseudo-registers)
   c_maxlen = 0;
   for(const auto& reg: ourPseudoRegisters)
-  {
-    const size_t len = reg.name.size();
-    if(len > c_maxlen)  c_maxlen = len;
-  }
+    c_maxlen = std::max(reg.name.size(), c_maxlen);
 
   buf << "\nPseudo-registers:\n";
   for(const auto& reg: ourPseudoRegisters)

src/debugger/DebuggerParser.cxx

@@ -1481,10 +1481,7 @@ void DebuggerParser::executeHelp()
     // Find length of longest command
     size_t clen = 0;
     for(const auto& c: commands)
-    {
-      const size_t len = c.cmdString.length();
-      if(len > clen)  clen = len;
-    }
+      clen = std::max(clen, c.cmdString.length());
 
     commandResult << setfill(' ');
     for(const auto& c: commands)

src/debugger/gui/CartDebugWidget.cxx

@@ -69,8 +69,7 @@ int CartDebugWidget::addBaseInformation(size_t bytes, string_view manufacturer,
   const StringParser bs(desc, (fwidth - ScrollBarWidget::scrollBarWidth(_font)) /
     myFontWidth);
   const StringList& sl = bs.stringList();
-  size_t lines = sl.size();
-  if(lines < 3) lines = 3;
+  size_t lines = std::max<size_t>(sl.size(), 3);
   bool useScrollbar = false;
   if(lines > maxlines)
   {

src/debugger/gui/CartRamWidget.cxx

@@ -64,10 +64,9 @@ CartRamWidget::CartRamWidget(
   constexpr uInt16 maxlines = 6;
   const StringParser bs(desc, (fwidth - ScrollBarWidget::scrollBarWidth(_font)) / myFontWidth);
   const StringList& sl = bs.stringList();
-  auto lines = static_cast<uInt32>(sl.size());
-  bool useScrollbar = false;
 
-  if(lines < 2) lines = 2;
+  bool useScrollbar = false;
+  auto lines = std::max<uInt32>(static_cast<uInt32>(sl.size()), 2);
   if(lines > maxlines)
   {
     lines = maxlines;

src/debugger/gui/DataGridWidget.cxx

@@ -118,10 +118,8 @@ void DataGridWidget::setList(const IntArray& alist, const IntArray& vlist,
   const size_t size = vlist.size();  // assume the alist is the same size
 
   const bool dirty = _editMode
-    || !std::equal(_valueList.begin(), _valueList.end(),
-                   vlist.begin(), vlist.end())
-    || !std::equal(_changedList.begin(), _changedList.end(),
-                   changed.begin(), changed.end());
+    || !std::ranges::equal(_valueList, vlist)
+    || !std::ranges::equal(_changedList, changed);
 
   _addrList.clear();
   _valueList.clear();

src/debugger/gui/PromptWidget.cxx

@@ -170,9 +170,8 @@ bool PromptWidget::handleKeyDown(StellaKey key, StellaMod mod)
       if(_scrollLine < _currentPos / _lineWidth)
       {
         // Scroll page by page when not at cursor position:
-        _scrollLine += _linesPerPage;
-        if(_scrollLine > _promptEndPos / _lineWidth)
-          _scrollLine = _promptEndPos / _lineWidth;
+        _scrollLine = std::min(_scrollLine + _linesPerPage,
+                               _promptEndPos / _lineWidth);
         updateScrollBuffer();
         break;
       }
@@ -293,9 +292,8 @@ bool PromptWidget::handleKeyDown(StellaKey key, StellaMod mod)
       if(_scrollLine < _linesPerPage)
         break;
 
-      _scrollLine -= _linesPerPage - 1;
-      if(_scrollLine < _firstLineInBuffer + _linesPerPage - 1)
-        _scrollLine = _firstLineInBuffer + _linesPerPage - 1;
+      _scrollLine = std::max(_scrollLine - (_linesPerPage - 1),
+                             _firstLineInBuffer + _linesPerPage - 1);
       updateScrollBuffer();
       break;
 
@@ -304,9 +302,8 @@ bool PromptWidget::handleKeyDown(StellaKey key, StellaMod mod)
       if(_scrollLine >= _promptEndPos / _lineWidth)
         break;
 
-      _scrollLine += _linesPerPage - 1;
-      if(_scrollLine > _promptEndPos / _lineWidth)
-        _scrollLine = _promptEndPos / _lineWidth;
+      _scrollLine = std::min(_scrollLine + (_linesPerPage - 1),
+                             _promptEndPos / _lineWidth);
       updateScrollBuffer();
       break;
 
@@ -316,9 +313,7 @@ bool PromptWidget::handleKeyDown(StellaKey key, StellaMod mod)
       break;
 
     case Event::UIEnd:
-      _scrollLine = _promptEndPos / _lineWidth;
-      if(_scrollLine < _linesPerPage - 1)
-        _scrollLine = _linesPerPage - 1;
+      _scrollLine = std::max(_promptEndPos / _lineWidth, _linesPerPage - 1);
       updateScrollBuffer();
       break;
 
@@ -727,8 +722,7 @@ bool PromptWidget::autoComplete(int direction)
 
   if(_tabCount != -1)
     len = static_cast<int>(strlen(_inputStr));
-  if(len > kLineBufferSize - 1)
-    len = kLineBufferSize - 1;
+  len = std::min(len, kLineBufferSize - 1);
 
   int lastDelimPos = -1;
   char delimiter = '\0';
@@ -748,11 +742,11 @@ bool PromptWidget::autoComplete(int direction)
   if(_tabCount == -1)
     _inputStr[len] = '\0';
 
-  StringList list;
+  StringList lst;
 
   if(lastDelimPos == -1)
     // no delimiters, do only command completion:
-    DebuggerParser::getCompletions(_inputStr, list);
+    DebuggerParser::getCompletions(_inputStr, lst);
   else
   {
     const size_t strLen = len - lastDelimPos - 1;
@@ -761,29 +755,29 @@ bool PromptWidget::autoComplete(int direction)
     {
       // Special case for 'help' command
       if(BSPF::startsWithIgnoreCase(_inputStr, "help"))
-        DebuggerParser::getCompletions(_inputStr + lastDelimPos + 1, list);
+        DebuggerParser::getCompletions(_inputStr + lastDelimPos + 1, lst);
       else
       {
         // we got a delimiter, so this must be a label or a function
         const Debugger& dbg = instance().debugger();
 
-        dbg.cartDebug().getCompletions(_inputStr + lastDelimPos + 1, list);
-        dbg.getCompletions(_inputStr + lastDelimPos + 1, list);
+        dbg.cartDebug().getCompletions(_inputStr + lastDelimPos + 1, lst);
+        dbg.getCompletions(_inputStr + lastDelimPos + 1, lst);
       }
     }
 
   }
-  if(list.empty())
+  if(lst.empty())
     return false;
-  sort(list.begin(), list.end());
+  std::ranges::sort(lst);
 
   if(direction < 0)
   {
     if(--_tabCount < 0)
-      _tabCount = static_cast<int>(list.size()) - 1;
+      _tabCount = static_cast<int>(lst.size()) - 1;
   }
   else
-    _tabCount = (_tabCount + 1) % list.size();
+    _tabCount = (_tabCount + 1) % lst.size();
 
   nextLine();
   _currentPos = _promptStartPos;
@@ -796,7 +790,7 @@ bool PromptWidget::autoComplete(int direction)
     putcharIntern(delimiter);
 
   // ...and add current autocompletion string
-  print(list[_tabCount]);
+  print(lst[_tabCount]);
   putcharIntern(' ');
   _promptEndPos = _currentPos;
 

src/debugger/gui/RomListWidget.cxx

@@ -164,11 +164,7 @@ void RomListWidget::setHighlighted(int item)
 
     // Only scroll the list if we're about to pass the page boundary
     if (_highlightedItem < _currentPos)
-    {
-      _currentPos -= _rows;
-      if (_currentPos < 0)
-        _currentPos = 0;
-    }
+      _currentPos = std::max(_currentPos - _rows, 0);
     else if(_highlightedItem == _currentPos + _rows)
       _currentPos += _rows;
 
@@ -187,10 +183,7 @@ void RomListWidget::recalc()
 {
   const int size = static_cast<int>(myDisasm->list.size());
 
-  if (_currentPos >= size)
-    _currentPos = size - 1;
-  if (_currentPos < 0)
-    _currentPos = 0;
+  _currentPos = BSPF::clamp(_currentPos, 0, size - 1);
 
   if(_selectedItem < 0 || _selectedItem >= size)
     _selectedItem = 0;
@@ -378,15 +371,12 @@ bool RomListWidget::handleEvent(Event::Type e)
       break;
 
     case Event::UIPgUp:
-      _selectedItem -= _rows - 1;
-      if (_selectedItem < 0)
-        _selectedItem = 0;
+      _selectedItem = std::max(_selectedItem - (_rows - 1), 0);
       break;
 
     case Event::UIPgDown:
-      _selectedItem += _rows - 1;
-      if (_selectedItem >= static_cast<int>(myDisasm->list.size()))
-        _selectedItem = static_cast<int>(myDisasm->list.size()) - 1;
+      _selectedItem = std::min(_selectedItem + (_rows - 1),
+          static_cast<int>(myDisasm->list.size()) - 1);
       break;
 
     case Event::UIHome:

src/debugger/gui/ToggleBitWidget.cxx

@@ -68,8 +68,7 @@ void ToggleBitWidget::setList(const StringList& off, const StringList& on)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void ToggleBitWidget::setState(const BoolArray& state, const BoolArray& changed)
 {
-  if(!std::equal(_changedList.begin(), _changedList.end(),
-     changed.begin(), changed.end()))
+  if(!std::ranges::equal(_changedList, changed))
     setDirty();
 
   _stateList.clear();
@@ -78,7 +77,6 @@ void ToggleBitWidget::setState(const BoolArray& state, const BoolArray& changed)
   _changedList = changed;
 }
 
-
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 string ToggleBitWidget::getToolTip(const Common::Point& pos) const
 {

src/emucore/CartELF.cxx

@@ -33,6 +33,8 @@
 
 #include "CartELF.hxx"
 
+// NOLINTBEGIN(bugprone-unchecked-optional-access)
+
 using namespace elfEnvironment;
 
 namespace {
@@ -178,7 +180,7 @@ namespace {
   {
     if (!props) return SystemType::ntsc;
 
-    const string displayFormat = props->get(PropType::Display_Format);
+    const string& displayFormat = props->get(PropType::Display_Format);
 
     if(displayFormat == "PAL" || displayFormat == "SECAM") return SystemType::pal;
     if(displayFormat == "PAL60") return SystemType::pal60;
@@ -767,3 +769,5 @@ void CartridgeELF::resetWithConfig()
 
   switchExecutionStage();
 }
+
+// NOLINTEND(bugprone-unchecked-optional-access)

src/emucore/EventHandler.cxx

@@ -2051,15 +2051,15 @@ void EventHandler::setComboMap()
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-json EventHandler::convertLegacyComboMapping(string list)
+json EventHandler::convertLegacyComboMapping(string lst)
 {
   json convertedMapping = json::array();
 
   // Since istringstream swallows whitespace, we have to make the
   // delimiters be spaces
-  std::replace(list.begin(), list.end(), ':', ' ');
-  std::replace(list.begin(), list.end(), ',', ' ');
-  istringstream buf(list);
+  std::ranges::replace(lst, ':', ' ');
+  std::ranges::replace(lst, ',', ' ');
+  istringstream buf(lst);
 
   try
   {

src/emucore/EventHandler.hxx

@@ -475,7 +475,7 @@ class EventHandler
     void setActionMappings(EventMode mode);
     void setDefaultKeymap(Event::Type, EventMode mode);
     void setDefaultJoymap(Event::Type, EventMode mode);
-    static nlohmann::json convertLegacyComboMapping(string list);
+    static nlohmann::json convertLegacyComboMapping(string lst);
     void saveComboMapping();
 
     static StringList getActionList(EventMode mode);

src/emucore/FSNode.cxx

@@ -89,8 +89,7 @@ bool FSNode::getAllChildren(FSList& fslist, ListMode mode,
     }
   #endif
 
-    std::sort(fslist.begin(), fslist.end(),
-              [](const FSNode& node1, const FSNode& node2)
+    std::ranges::sort(fslist, [](const FSNode& node1, const FSNode& node2)
     {
       if(node1.isDirectory() != node2.isDirectory())
         return node1.isDirectory();
@@ -153,7 +152,7 @@ bool FSNode::getChildren(FSList& fslist, ListMode mode,
     }
   #endif
 
-    std::sort(tmp.begin(), tmp.end(),
+    std::ranges::sort(tmp,
         [](const AbstractFSNodePtr& node1, const AbstractFSNodePtr& node2)
     {
       if(node1->isDirectory() != node2->isDirectory())

src/emucore/PlusROM.cxx

@@ -478,7 +478,7 @@ void PlusROM::receive()
         // and start over
         const auto [responseSize, response] = (*iter)->getResponse();
 
-        for(uInt8 i = 0; i < responseSize; i++)
+        for(size_t i = 0; i < responseSize; ++i)
           myRxBuffer[myRxWritePos++] = response[i];
 
         myPendingRequests.erase(iter);

src/emucore/Settings.cxx

@@ -366,7 +366,7 @@ void Settings::validate()
   if(i < -5 || i > 5)  setValue("tia.vsizeadjust", 0);
 
   string s = getString("tia.dbgcolors");
-  sort(s.begin(), s.end());
+  std::ranges::sort(s);
   if(s != "bgopry")  setValue("tia.dbgcolors", "roygpb");
 
   if(PhosphorHandler::toPhosphorMode(getString(PhosphorHandler::SETTING_MODE)) == PhosphorHandler::ByRom)

src/emucore/elf/VcsLib.cxx

@@ -181,7 +181,7 @@ void VcsLib::vcsWrite5(uInt8 zpAddress, uInt8 value)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void VcsLib::vcsCopyOverblankToRiotRam()
 {
-  for (uInt8 i = 0; i < OVERBLANK_PROGRAM_SIZE; i++)
+  for (uInt32 i = 0; i < OVERBLANK_PROGRAM_SIZE; ++i)
     vcsWrite5(0x80 + i, OVERBLANK_PROGRAM[i]);
 }
 

src/gui/Dialog.cxx

@@ -987,9 +987,8 @@ void Dialog::addOKBGroup(WidgetArray& wid, const GUI::Font& font,
             VBORDER      = Dialog::vBorder(),
             HBORDER      = Dialog::hBorder();
 
-  buttonWidth = std::max(buttonWidth,
-                         std::max(Dialog::buttonWidth(okText),
-                         Dialog::buttonWidth("Cancel")));
+  buttonWidth = std::max({buttonWidth, Dialog::buttonWidth(okText),
+                          Dialog::buttonWidth("Cancel")});
   _w = std::max(HBORDER * 2 + buttonWidth * 2 + BUTTON_GAP, _w);
 
   addOKWidget(new ButtonWidget(this, font, (_w - buttonWidth) / 2,
@@ -1007,10 +1006,10 @@ void Dialog::addOKCancelBGroup(WidgetArray& wid, const GUI::Font& font,
             VBORDER      = Dialog::vBorder(),
             HBORDER      = Dialog::hBorder();
 
-  buttonWidth = std::max(buttonWidth,
-                         std::max(Dialog::buttonWidth("Defaults"),
-                         std::max(Dialog::buttonWidth(okText),
-                         Dialog::buttonWidth(cancelText))));
+  buttonWidth = std::max({buttonWidth,
+                          Dialog::buttonWidth("Defaults"),
+                          Dialog::buttonWidth(okText),
+                          Dialog::buttonWidth(cancelText)});
 
   _w = std::max(HBORDER * 2 + buttonWidth * 2 + BUTTON_GAP, _w);
 

src/gui/EditableWidget.cxx

@@ -64,9 +64,8 @@ void EditableWidget::setText(string_view str, bool changed)
   _caretPos = static_cast<int>(_editString.size());
   _selectSize = 0;
 
-  _editScrollOffset = (_font.getStringWidth(_editString) - (getEditRect().w()));
-  if (_editScrollOffset < 0)
-    _editScrollOffset = 0;
+  _editScrollOffset = std::max<int>(0,
+    _font.getStringWidth(_editString) - getEditRect().w());
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -424,8 +423,8 @@ bool EditableWidget::handleKeyDown(StellaKey key, StellaMod mod)
       if(handled)
       {
         // Put caret at last difference
-        myUndoHandler->lastDiff(_editString, oldString);
-        setCaretPos(myUndoHandler->lastDiff(_editString, oldString));
+        UndoHandler::lastDiff(_editString, oldString);
+        setCaretPos(UndoHandler::lastDiff(_editString, oldString));
         _selectSize = 0;
         sendCommand(EditableWidget::kChangedCmd, key, _id);
       }
@@ -583,9 +582,7 @@ bool EditableWidget::adjustOffset()
     if (strWidth - _editScrollOffset < editWidth)
     {
       // scroll right
-      _editScrollOffset = (strWidth - editWidth);
-      if (_editScrollOffset < 0)
-        _editScrollOffset = 0;
+      _editScrollOffset = std::max(strWidth - editWidth, 0);
     }
   }
 

src/gui/FavoritesManager.cxx

@@ -182,8 +182,7 @@ const FavoritesManager::UserList& FavoritesManager::userList() const
   sortedList.assign(myUserSet.begin(), myUserSet.end());
 
   if(!mySettings.getBool("altsorting"))
-    std::sort(sortedList.begin(), sortedList.end(),
-      [](string_view a, string_view b)
+    std::ranges::sort(sortedList, [](string_view a, string_view b)
     {
       // Sort without path
       const FSNode aNode(a);
@@ -221,7 +220,7 @@ void FavoritesManager::addRecent(string_view path)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 bool FavoritesManager::removeRecent(string_view path)
 {
-  auto it = std::find(myRecentList.begin(), myRecentList.end(), path);
+  auto it = std::ranges::find(myRecentList, path);
 
   if(it != myRecentList.end())
     myRecentList.erase(it);
@@ -246,8 +245,7 @@ const FavoritesManager::RecentList& FavoritesManager::recentList() const
   {
     sortedList.assign(myRecentList.begin(), myRecentList.end());
 
-    std::sort(sortedList.begin(), sortedList.end(),
-      [](string_view a, string_view b)
+    std::ranges::sort(sortedList, [](string_view a, string_view b)
     {
       // Sort alphabetical, without path
       const FSNode aNode(a);
@@ -324,8 +322,7 @@ FavoritesManager::sortedPopularList(bool sortByName) const
   sortedList.clear();
   sortedList.assign(myPopularMap.begin(), myPopularMap.end());
 
-  std::sort(sortedList.begin(), sortedList.end(),
-    [sortByName](const PopularType& a, const PopularType& b)
+  std::ranges::sort(sortedList, [sortByName](const PopularType& a, const PopularType& b)
   {
     // 1. sort by most popular
     if(!sortByName && a.second != b.second)

src/gui/ListWidget.cxx

@@ -141,17 +141,14 @@ void ListWidget::setHighlighted(int item)
 const string& ListWidget::getSelectedString() const
 {
   return (_selectedItem >= 0 && _selectedItem < static_cast<int>(_list.size()))
-            ? _list[_selectedItem] : EmptyString;
+    ? _list[_selectedItem]
+    : EmptyString;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void ListWidget::scrollTo(int item)
 {
-  const int size = static_cast<int>(_list.size());
-  if (item >= size)
-    item = size - 1;
-  if (item < 0)
-    item = 0;
+  item = BSPF::clamp(item, 0, static_cast<int>(_list.size() - 1));
 
   if(_currentPos != item)
   {
@@ -178,14 +175,8 @@ void ListWidget::recalc()
     else
       _currentPos = size - _rows;
   }
-  if (_currentPos < 0)
-    _currentPos = 0;
-
-  if(_selectedItem >= size)
-    _selectedItem = size - 1;
-  if(_selectedItem < 0)
-    _selectedItem = 0;
-
+  _currentPos = std::max(_currentPos, 0);
+  _selectedItem = BSPF::clamp(_selectedItem, 0, size - 1);
   _editMode = false;
 
   if(_useScrollbar)
@@ -351,16 +342,12 @@ bool ListWidget::handleEvent(Event::Type e)
 
     case Event::UIPgUp:
     case Event::UILeft:
-      _selectedItem -= _rows - 1;
-      if (_selectedItem < 0)
-        _selectedItem = 0;
+      _selectedItem = std::max(_selectedItem - (_rows - 1), 0);
       break;
 
     case Event::UIPgDown:
     case Event::UIRight:
-      _selectedItem += _rows - 1;
-      if (_selectedItem >= size)
-        _selectedItem = size - 1;
+      _selectedItem = std::min(_selectedItem + (_rows - 1), size - 1);
       break;
 
     case Event::UIHome:

src/gui/RomImageWidget.cxx

@@ -244,8 +244,8 @@ bool RomImageWidget::getImageList(const string& propName, const string& romName,
 
   // Sort again, not considering extensions, else <filename.png|jpg> would be at
   // the end of the list
-  std::sort(myImageList.begin(), myImageList.end(),
-            [oldFileName](const FSNode& node1, const FSNode& node2)
+  std::ranges::sort(myImageList, [oldFileName]
+    (const FSNode& node1, const FSNode& node2)
     {
       const int compare = BSPF::compareIgnoreCase(
         node1.getNameWithExt(), node2.getNameWithExt());
@@ -395,9 +395,9 @@ void RomImageWidget::zoomSurfaces(bool zoomed, bool force)
       const Int32 lh = maxSize.h - b * 2;
       const Int32 iw = mySrcRect.w() * scaleDpi;
       const Int32 ih = mySrcRect.h() * scaleDpi;
-      const float zoom = std::min(1.F, // do not zoom beyond original size
-                                  std::min(static_cast<float>(lw) / iw,
-                                           static_cast<float>(lh) / ih));
+      const float zoom = std::min({1.F, // do not zoom beyond original size
+                                   static_cast<float>(lw) / iw,
+                                   static_cast<float>(lh) / ih});
       const Int32 w = iw * zoom;
       const Int32 h = ih * zoom;
 

src/gui/ScrollBarWidget.cxx

@@ -184,15 +184,10 @@ void ScrollBarWidget::handleMouseMoved(int x, int y)
 
   if(_draggingPart == Part::Slider)
   {
+    _sliderPos = BSPF::clamp(y - _sliderDeltaMouseDownPos,
+        _upDownBoxHeight, _h - _upDownBoxHeight - _sliderHeight);
+
     const int old_pos = _currentPos;
-    _sliderPos = y - _sliderDeltaMouseDownPos;
-
-    if(_sliderPos < _upDownBoxHeight)
-      _sliderPos = _upDownBoxHeight;
-
-    if(_sliderPos > _h - _upDownBoxHeight - _sliderHeight)
-      _sliderPos = _h - _upDownBoxHeight - _sliderHeight;
-
     _currentPos = (_sliderPos - _upDownBoxHeight) * (_numEntries - _entriesPerPage) /
                   (_h - 2 * _upDownBoxHeight - _sliderHeight);
     checkBounds(old_pos);
@@ -256,14 +251,12 @@ void ScrollBarWidget::recalc()
 
   if(_numEntries > _entriesPerPage)
   {
-    _sliderHeight = (_h - 2 * _upDownBoxHeight) * _entriesPerPage / _numEntries;
-    if(_sliderHeight < _upDownBoxHeight)
-      _sliderHeight = _upDownBoxHeight;
+    _sliderHeight = std::max(_upDownBoxHeight,
+        (_h - 2 * _upDownBoxHeight) * _entriesPerPage / _numEntries);
 
-    _sliderPos = _upDownBoxHeight + (_h - 2 * _upDownBoxHeight - _sliderHeight) *
-                 _currentPos / (_numEntries - _entriesPerPage);
-    if(_sliderPos < 0)
-      _sliderPos = 0;
+    _sliderPos = std::max(0,
+      _upDownBoxHeight + (_h - 2 * _upDownBoxHeight - _sliderHeight) *
+      _currentPos / (_numEntries - _entriesPerPage));
   }
   else
   {
@@ -309,10 +302,9 @@ void ScrollBarWidget::drawWidget(bool hilite)
   if(!isSinglePage)
   {
     // align slider to scroll intervals
-    int alignedPos = _upDownBoxHeight + (_h - 2 * _upDownBoxHeight - _sliderHeight) *
-      _currentPos / (_numEntries - _entriesPerPage);
-    if(alignedPos < 0)
-      alignedPos = 0;
+    const int alignedPos = std::max(0,
+      _upDownBoxHeight + (_h - 2 * _upDownBoxHeight - _sliderHeight) *
+      _currentPos / (_numEntries - _entriesPerPage));
 
     s.fillRect(_x + 1, _y + alignedPos - 1, _w - 2, _sliderHeight + 2,
               (hilite && _part == Part::Slider) ? kScrollColorHi : kScrollColor);

src/gui/TabWidget.cxx

@@ -81,14 +81,12 @@ int TabWidget::addTab(string_view title, int tabWidth)
   }
 
   if(tabWidth == NO_WIDTH)
-    if(_tabWidth < newWidth)
-      _tabWidth = newWidth;
+    _tabWidth = std::max(_tabWidth, newWidth);
 
   if(numTabs - fixedTabs)
   {
     const int maxWidth = (_w - kTabLeftOffset - fixedWidth) / (numTabs - fixedTabs) - kTabLeftOffset;
-    if(_tabWidth > maxWidth)
-      _tabWidth = maxWidth;
+    _tabWidth = std::min(_tabWidth, maxWidth);
   }
 
   // Activate the new tab

src/gui/ToolTip.cxx

@@ -157,7 +157,7 @@ void ToolTip::show(string_view tip)
   {
     string leftStr, rightStr;
 
-    surface()->splitString(*myFont, inStr, maxWidth, leftStr, rightStr);
+    FBSurface::splitString(*myFont, inStr, maxWidth, leftStr, rightStr);
     width = std::max(width, static_cast<uInt32>(myFont->getStringWidth(leftStr)));
     inStr = rightStr;
   }

src/tools/TIDY

@@ -1,12 +1,13 @@
 #!/usr/bin/env bash
 
-run-clang-tidy-18 -header-filter=\(.*\.hxx\) \
+run-clang-tidy-19 -header-filter=\(.*\.hxx\) \
 -checks=*,\
 -abseil*,\
 -altera*,\
 -android*,\
 -fuchsia*,\
 -llvmlibc-inline-function-decl,\
+-boost-use-ranges,\
 -bugprone-assignment-in-if-condition,\
 -bugprone-branch-clone,\
 -bugprone-easily-swappable-parameters,\
@@ -15,6 +16,7 @@ run-clang-tidy-18 -header-filter=\(.*\.hxx\) \
 -cert-dcl37-c,\
 -cert-dcl51-cpp,\
 -cert-err58-cpp,\
+-cert-int09-c,\
 -clang-analyzer-cplusplus.NewDeleteLeaks,\
 -clang-analyzer-optin.performance.Padding,\
 -cppcoreguidelines-avoid-c-arrays,\
@@ -60,6 +62,7 @@ run-clang-tidy-18 -header-filter=\(.*\.hxx\) \
 -modernize-avoid-bind,\
 -modernize-avoid-c-arrays,\
 -modernize-pass-by-value,\
+-modernize-use-designated-initializers,\
 -modernize-use-equals-delete,\
 -modernize-use-nodiscard,\
 -modernize-use-trailing-return-type,\
@@ -67,11 +70,13 @@ run-clang-tidy-18 -header-filter=\(.*\.hxx\) \
 -readability-avoid-unconditional-preprocessor-if,\
 -readability-braces-around-statements,\
 -readability-else-after-return,\
+-readability-enum-initial-value,\
 -readability-function-cognitive-complexity,\
 -readability-identifier-length,\
 -readability-implicit-bool-conversion,\
 -readability-isolate-declaration,\
 -readability-magic-numbers,\
+-readability-math-missing-parentheses,\
 -readability-named-parameter,\
 -readability-redundant-access-specifiers,\
 -readability-simplify-boolean-expr,\