PatchEngine: Make PatchType an enum class

Makes the enum strongly typed. A function for retrieving the string
representation of the enum is also added, which allows hiding the array
that contains all of the strings from view (i.e. we operate on the API,
not the exposed internals). This also allows us to bounds check any
querying for the strings.

Source/Core/Core/PatchEngine.cpp

@@ -9,6 +9,8 @@
 #include "Core/PatchEngine.h"
 
 #include <algorithm>
+#include <array>
+#include <iterator>
 #include <map>
 #include <set>
 #include <string>
@@ -26,15 +28,20 @@
 
 namespace PatchEngine
 {
-const char* PatchTypeStrings[] = {
+constexpr std::array<const char*, 3> s_patch_type_strings{{
     "byte",
     "word",
     "dword",
-};
+}};
 
 static std::vector<Patch> onFrame;
 static std::map<u32, int> speedHacks;
 
+const char* PatchTypeAsString(PatchType type)
+{
+  return s_patch_type_strings.at(static_cast<int>(type));
+}
+
 void LoadPatchSection(const std::string& section, std::vector<Patch>& patches, IniFile& globalIni,
                       IniFile& localIni)
 {
@@ -97,8 +104,10 @@ void LoadPatchSection(const std::string& section, std::vector<Patch>& patches, I
           success &= TryParse(items[0], &pE.address);
           success &= TryParse(items[2], &pE.value);
 
-          pE.type = PatchType(std::find(PatchTypeStrings, PatchTypeStrings + 3, items[1]) -
-                              PatchTypeStrings);
+          const auto iter =
+              std::find(s_patch_type_strings.begin(), s_patch_type_strings.end(), items[1]);
+          pE.type = PatchType(std::distance(s_patch_type_strings.begin(), iter));
+
           success &= (pE.type != (PatchType)3);
           if (success)
           {
@@ -173,13 +182,13 @@ static void ApplyPatches(const std::vector<Patch>& patches)
         u32 value = entry.value;
         switch (entry.type)
         {
-        case PATCH_8BIT:
-          PowerPC::HostWrite_U8((u8)value, addr);
+        case PatchType::Patch8Bit:
+          PowerPC::HostWrite_U8(static_cast<u8>(value), addr);
           break;
-        case PATCH_16BIT:
-          PowerPC::HostWrite_U16((u16)value, addr);
+        case PatchType::Patch16Bit:
+          PowerPC::HostWrite_U16(static_cast<u16>(value), addr);
           break;
-        case PATCH_32BIT:
+        case PatchType::Patch32Bit:
           PowerPC::HostWrite_U32(value, addr);
           break;
         default:

Source/Core/Core/PatchEngine.h

@@ -13,20 +13,18 @@ class IniFile;
 
 namespace PatchEngine
 {
-enum PatchType
+enum class PatchType
 {
-  PATCH_8BIT,
-  PATCH_16BIT,
-  PATCH_32BIT,
+  Patch8Bit,
+  Patch16Bit,
+  Patch32Bit,
 };
 
-extern const char* PatchTypeStrings[];
-
 struct PatchEntry
 {
   PatchEntry() = default;
   PatchEntry(PatchType t, u32 addr, u32 value_) : type(t), address(addr), value(value_) {}
-  PatchType type = PatchType::PATCH_8BIT;
+  PatchType type = PatchType::Patch8Bit;
   u32 address = 0;
   u32 value = 0;
 };
@@ -39,6 +37,8 @@ struct Patch
   bool user_defined = false;  // False if this code is shipped with Dolphin.
 };
 
+const char* PatchTypeAsString(PatchType type);
+
 int GetSpeedhackCycles(const u32 addr);
 void LoadPatchSection(const std::string& section, std::vector<Patch>& patches, IniFile& globalIni,
                       IniFile& localIni);
@@ -52,15 +52,15 @@ inline int GetPatchTypeCharLength(PatchType type)
   int size = 8;
   switch (type)
   {
-  case PatchEngine::PATCH_8BIT:
+  case PatchType::Patch8Bit:
     size = 2;
     break;
 
-  case PatchEngine::PATCH_16BIT:
+  case PatchType::Patch16Bit:
     size = 4;
     break;
 
-  case PatchEngine::PATCH_32BIT:
+  case PatchType::Patch32Bit:
     size = 8;
     break;
   }

Source/Core/DolphinQt2/Config/NewPatchDialog.cpp

@@ -161,24 +161,24 @@ QGroupBox* NewPatchDialog::CreateEntry(int index)
 
   connect(byte, &QRadioButton::toggled, [this, index](bool checked) {
     if (checked)
-      m_patch.entries[index].type = PatchEngine::PATCH_8BIT;
+      m_patch.entries[index].type = PatchEngine::PatchType::Patch8Bit;
   });
 
   connect(word, &QRadioButton::toggled, [this, index](bool checked) {
     if (checked)
-      m_patch.entries[index].type = PatchEngine::PATCH_16BIT;
+      m_patch.entries[index].type = PatchEngine::PatchType::Patch16Bit;
   });
 
   connect(dword, &QRadioButton::toggled, [this, index](bool checked) {
     if (checked)
-      m_patch.entries[index].type = PatchEngine::PATCH_32BIT;
+      m_patch.entries[index].type = PatchEngine::PatchType::Patch32Bit;
   });
 
   auto entry_type = m_patch.entries[index].type;
 
-  byte->setChecked(entry_type == PatchEngine::PATCH_8BIT);
-  word->setChecked(entry_type == PatchEngine::PATCH_16BIT);
-  dword->setChecked(entry_type == PatchEngine::PATCH_32BIT);
+  byte->setChecked(entry_type == PatchEngine::PatchType::Patch8Bit);
+  word->setChecked(entry_type == PatchEngine::PatchType::Patch16Bit);
+  dword->setChecked(entry_type == PatchEngine::PatchType::Patch32Bit);
 
   offset->setText(
       QStringLiteral("%1").arg(m_patch.entries[index].address, 10, 16, QLatin1Char('0')));

Source/Core/DolphinQt2/Config/PatchesWidget.cpp

@@ -138,7 +138,7 @@ void PatchesWidget::SavePatches()
     for (const auto& entry : patch.entries)
     {
       lines.push_back(StringFromFormat("0x%08X:%s:0x%08X", entry.address,
-                                       PatchEngine::PatchTypeStrings[entry.type], entry.value));
+                                       PatchEngine::PatchTypeAsString(entry.type), entry.value));
     }
   }
 

Source/Core/DolphinWX/ISOProperties/ISOProperties.cpp

@@ -755,9 +755,10 @@ void CISOProperties::PatchList_Save()
       lines.push_back("$" + p.name);
       for (const PatchEngine::PatchEntry& entry : p.entries)
       {
-        std::string temp = StringFromFormat("0x%08X:%s:0x%08X", entry.address,
-                                            PatchEngine::PatchTypeStrings[entry.type], entry.value);
-        lines.push_back(temp);
+        std::string temp =
+            StringFromFormat("0x%08X:%s:0x%08X", entry.address,
+                             PatchEngine::PatchTypeAsString(entry.type), entry.value);
+        lines.push_back(std::move(temp));
       }
     }
     ++index;

Source/Core/DolphinWX/PatchAddEdit.cpp

@@ -68,11 +68,14 @@ void CPatchAddEdit::CreateGUIControls(int _selection)
   EntrySelection->SetRange(0, (int)tempEntries.size() - 1);
   EntrySelection->SetValue((int)tempEntries.size() - 1);
 
-  wxArrayString wxArrayStringFor_EditPatchType;
+  wxArrayString patch_types;
   for (int i = 0; i < 3; ++i)
-    wxArrayStringFor_EditPatchType.Add(StrToWxStr(PatchEngine::PatchTypeStrings[i]));
-  EditPatchType = new wxRadioBox(this, wxID_ANY, _("Type"), wxDefaultPosition, wxDefaultSize,
-                                 wxArrayStringFor_EditPatchType, 3, wxRA_SPECIFY_COLS);
+  {
+    patch_types.Add(
+        StrToWxStr(PatchEngine::PatchTypeAsString(static_cast<PatchEngine::PatchType>(i))));
+  }
+  EditPatchType =
+      new wxRadioBox(this, wxID_ANY, _("Type"), wxDefaultPosition, wxDefaultSize, patch_types);
   EditPatchType->SetSelection((int)tempEntries.at(0).type);
 
   wxStaticText* EditPatchValueText = new wxStaticText(this, wxID_ANY, _("Value:"));
@@ -206,7 +209,7 @@ void CPatchAddEdit::UpdateEntryCtrls(PatchEngine::PatchEntry pE)
   sbEntry->GetStaticBox()->SetLabel(
       wxString::Format(_("Entry %d/%d"), currentItem, (int)tempEntries.size()));
   EditPatchOffset->SetValue(wxString::Format("%08X", pE.address));
-  EditPatchType->SetSelection(pE.type);
+  EditPatchType->SetSelection(static_cast<int>(pE.type));
   EditPatchValue->SetValue(
       wxString::Format("%0*X", PatchEngine::GetPatchTypeCharLength(pE.type), pE.value));
 }
@@ -217,19 +220,19 @@ bool CPatchAddEdit::UpdateTempEntryData(std::vector<PatchEngine::PatchEntry>::it
   bool parsed_ok = true;
 
   if (EditPatchOffset->GetValue().ToULong(&value, 16))
-    (*iterEntry).address = value;
+    iterEntry->address = value;
   else
     parsed_ok = false;
 
-  PatchEngine::PatchType tempType = (*iterEntry).type =
-      (PatchEngine::PatchType)EditPatchType->GetSelection();
+  const auto tempType = iterEntry->type =
+      static_cast<PatchEngine::PatchType>(EditPatchType->GetSelection());
 
   if (EditPatchValue->GetValue().ToULong(&value, 16))
   {
-    (*iterEntry).value = value;
-    if (tempType == PatchEngine::PATCH_8BIT && value > 0xff)
+    iterEntry->value = value;
+    if (tempType == PatchEngine::PatchType::Patch8Bit && value > 0xff)
       parsed_ok = false;
-    else if (tempType == PatchEngine::PATCH_16BIT && value > 0xffff)
+    else if (tempType == PatchEngine::PatchType::Patch16Bit && value > 0xffff)
       parsed_ok = false;
   }
   else