Common/DebugInterface: Make return value of GetColor() a u32

At its only usage point, its return value is stored into a u32, and the
default implementation returns 0xFFFFFFFF (-1), which would be an
unsigned integer. Given all of the bits are used to determine a color,
it makes slightly more sense to treat this as an unsigned value as
opposed to a signed one.

Source/Core/Common/DebugInterface.h

@@ -74,7 +74,7 @@ public:
   virtual void SetPC(u32 /*address*/) {}
   virtual void Step() {}
   virtual void RunToBreakpoint() {}
-  virtual int GetColor(u32 /*address*/) { return 0xFFFFFFFF; }
+  virtual u32 GetColor(u32 /*address*/) { return 0xFFFFFFFF; }
   virtual std::string GetDescription(u32 /*address*/) = 0;
   virtual void Clear() = 0;
 };

Source/Core/Core/Debugger/PPCDebugInterface.cpp

@@ -4,6 +4,7 @@
 
 #include "Core/Debugger/PPCDebugInterface.h"
 
+#include <array>
 #include <cstddef>
 #include <string>
 
@@ -300,13 +301,20 @@ void PPCDebugInterface::ToggleMemCheck(u32 address, bool read, bool write, bool
 // =======================================================
 // Separate the blocks with colors.
 // -------------
-int PPCDebugInterface::GetColor(u32 address)
+u32 PPCDebugInterface::GetColor(u32 address)
 {
   if (!IsAlive())
     return 0xFFFFFF;
   if (!PowerPC::HostIsRAMAddress(address))
     return 0xeeeeee;
-  static const int colors[6] = {
+
+  Common::Symbol* symbol = g_symbolDB.GetSymbolFromAddr(address);
+  if (!symbol)
+    return 0xFFFFFF;
+  if (symbol->type != Common::Symbol::Type::Function)
+    return 0xEEEEFF;
+
+  static constexpr std::array<u32, 6> colors{
       0xd0FFFF,  // light cyan
       0xFFd0d0,  // light red
       0xd8d8FF,  // light blue
@@ -314,12 +322,7 @@ int PPCDebugInterface::GetColor(u32 address)
       0xd0FFd0,  // light green
       0xFFFFd0,  // light yellow
   };
-  Common::Symbol* symbol = g_symbolDB.GetSymbolFromAddr(address);
-  if (!symbol)
-    return 0xFFFFFF;
-  if (symbol->type != Common::Symbol::Type::Function)
-    return 0xEEEEFF;
-  return colors[symbol->index % 6];
+  return colors[symbol->index % colors.size()];
 }
 // =============
 

Source/Core/Core/Debugger/PPCDebugInterface.h

@@ -77,7 +77,7 @@ public:
   void SetPC(u32 address) override;
   void Step() override {}
   void RunToBreakpoint() override;
-  int GetColor(u32 address) override;
+  u32 GetColor(u32 address) override;
   std::string GetDescription(u32 address) override;
 
   void Clear() override;

Source/Core/Core/HW/DSPLLE/DSPDebugInterface.cpp

@@ -4,6 +4,7 @@
 
 #include "Core/HW/DSPLLE/DSPDebugInterface.h"
 
+#include <array>
 #include <cstddef>
 #include <string>
 
@@ -257,17 +258,8 @@ void DSPDebugInterface::ToggleMemCheck(u32 address, bool read, bool write, bool
 // =======================================================
 // Separate the blocks with colors.
 // -------------
-int DSPDebugInterface::GetColor(u32 address)
+u32 DSPDebugInterface::GetColor(u32 address)
 {
-  static const int colors[6] = {
-      0xd0FFFF,  // light cyan
-      0xFFd0d0,  // light red
-      0xd8d8FF,  // light blue
-      0xFFd0FF,  // light purple
-      0xd0FFd0,  // light green
-      0xFFFFd0,  // light yellow
-  };
-
   // Scan backwards so we don't miss it. Hm, actually, let's not - it looks pretty good.
   int addr = -1;
   for (int i = 0; i < 1; i++)
@@ -284,7 +276,16 @@ int DSPDebugInterface::GetColor(u32 address)
     return 0xFFFFFF;
   if (symbol->type != Common::Symbol::Type::Function)
     return 0xEEEEFF;
-  return colors[symbol->index % 6];
+
+  static constexpr std::array<u32, 6> colors{
+      0xd0FFFF,  // light cyan
+      0xFFd0d0,  // light red
+      0xd8d8FF,  // light blue
+      0xFFd0FF,  // light purple
+      0xd0FFd0,  // light green
+      0xFFFFd0,  // light yellow
+  };
+  return colors[symbol->index % colors.size()];
 }
 // =============
 

Source/Core/Core/HW/DSPLLE/DSPDebugInterface.h

@@ -71,7 +71,7 @@ public:
   void SetPC(u32 address) override;
   void Step() override {}
   void RunToBreakpoint() override;
-  int GetColor(u32 address) override;
+  u32 GetColor(u32 address) override;
   std::string GetDescription(u32 address) override;
 
   void Clear() override;

Source/Core/DolphinQt/Debugger/CodeViewWidget.cpp

@@ -121,8 +121,8 @@ void CodeViewWidget::Update()
 
   for (int i = 0; i < rowCount(); i++)
   {
-    u32 addr = m_address - ((rowCount() / 2) * 4) + i * 4;
-    u32 color = PowerPC::debug_interface.GetColor(addr);
+    const u32 addr = m_address - ((rowCount() / 2) * 4) + i * 4;
+    const u32 color = PowerPC::debug_interface.GetColor(addr);
     auto* bp_item = new QTableWidgetItem;
     auto* addr_item = new QTableWidgetItem(QStringLiteral("%1").arg(addr, 8, 16, QLatin1Char('0')));