CMemoryCardDriver: Make use of std::array where applicable

Stronger typing and also allows eliminating several hardcoded data
sizes.

Runtime/MP1/CMemoryCardDriver.cpp

@@ -1,11 +1,13 @@
 #include "Runtime/MP1/CMemoryCardDriver.hpp"
 
+#include <array>
+
 #include "Runtime/CCRC32.hpp"
 #include "Runtime/MP1/MP1.hpp"
 
 namespace urde::MP1 {
 
-static const char* SaveFileNames[] = {"MetroidPrime A", "MetroidPrime B"};
+constexpr std::array SaveFileNames{"MetroidPrime A", "MetroidPrime B"};
 
 using ECardResult = kabufuda::ECardResult;
 using ECardSlot = kabufuda::ECardSlot;
@@ -100,19 +102,19 @@ ECardResult CMemoryCardDriver::SFileInfo::GetSaveDataOffset(u32& offOut) const {
 CMemoryCardDriver::SGameFileSlot::SGameFileSlot() { InitializeFromGameState(); }
 
 CMemoryCardDriver::SGameFileSlot::SGameFileSlot(CMemoryInStream& in) {
-  in.readBytesToBuf(x0_saveBuffer, 940);
+  in.readBytesToBuf(x0_saveBuffer.data(), x0_saveBuffer.size());
-  x944_fileInfo = CGameState::LoadGameFileState(x0_saveBuffer);
+  x944_fileInfo = CGameState::LoadGameFileState(x0_saveBuffer.data());
 }
 
 void CMemoryCardDriver::SGameFileSlot::InitializeFromGameState() {
-  CBitStreamWriter w(x0_saveBuffer, 940);
+  CBitStreamWriter w(x0_saveBuffer.data(), x0_saveBuffer.size());
   g_GameState->PutTo(w);
   w.Flush();
-  x944_fileInfo = CGameState::LoadGameFileState(x0_saveBuffer);
+  x944_fileInfo = CGameState::LoadGameFileState(x0_saveBuffer.data());
 }
 
 void CMemoryCardDriver::SGameFileSlot::LoadGameState(u32 idx) {
-  CBitStreamReader r(x0_saveBuffer, 940);
+  CBitStreamReader r(x0_saveBuffer.data(), x0_saveBuffer.size());
   static_cast<MP1::CMain*>(g_Main)->StreamNewGameState(r, idx);
 }
 
@@ -146,8 +148,9 @@ const CGameState::GameFileStateInfo* CMemoryCardDriver::GetGameFileStateInfo(int
 CMemoryCardDriver::SSaveHeader CMemoryCardDriver::LoadSaveHeader(CMemoryInStream& in) {
   SSaveHeader ret;
   ret.x0_version = in.readUint32Big();
-  for (int i = 0; i < 3; ++i)
+  for (bool& present : ret.x4_savePresent) {
-    ret.x4_savePresent[i] = in.readBool();
+    present = in.readBool();
+  }
   return ret;
 }
 
@@ -167,27 +170,30 @@ void CMemoryCardDriver::ReadFinished() {
   x20_fileTime = stat.GetTime();
   CMemoryInStream r(fileInfo.x34_saveData.data(), 3004);
   SSaveHeader header = LoadSaveHeader(r);
-  r.readBytesToBuf(x30_systemData, 174);
+  r.readBytesToBuf(x30_systemData.data(), x30_systemData.size());
 
-  for (int i = 0; i < 3; ++i)
+  for (size_t i = 0; i < xe4_fileSlots.size(); ++i) {
-    if (header.x4_savePresent[i])
+    if (header.x4_savePresent[i]) {
       xe4_fileSlots[i] = LoadSaveFile(r);
+    }
+  }
 
-  if (x19d_importPersistent)
+  if (x19d_importPersistent) {
     ImportPersistentOptions();
+  }
 }
 
 void CMemoryCardDriver::ImportPersistentOptions() {
-  CBitStreamReader r(x30_systemData, 174);
+  CBitStreamReader r(x30_systemData.data(), x30_systemData.size());
   CPersistentOptions opts(r);
   g_GameState->ImportPersistentOptions(opts);
 }
 
 void CMemoryCardDriver::ExportPersistentOptions() {
-  CBitStreamReader r(x30_systemData, 174);
+  CBitStreamReader r(x30_systemData.data(), x30_systemData.size());
   CPersistentOptions opts(r);
   g_GameState->ExportPersistentOptions(opts);
-  CBitStreamWriter w(x30_systemData, 174);
+  CBitStreamWriter w(x30_systemData.data(), x30_systemData.size());
   opts.PutTo(w);
 }
 
@@ -635,7 +641,7 @@ void CMemoryCardDriver::BuildNewFileSlot(u32 saveIdx) {
     slot = std::make_unique<SGameFileSlot>();
   slot->LoadGameState(saveIdx);
 
-  CBitStreamReader r(x30_systemData, 174);
+  CBitStreamReader r(x30_systemData.data(), x30_systemData.size());
   g_GameState->ReadPersistentOptions(r);
   ImportPersistentOptions();
   g_GameState->SetCardSerial(x28_cardSerial);
@@ -653,7 +659,7 @@ void CMemoryCardDriver::BuildExistingFileSlot(u32 saveIdx) {
   else
     slot->InitializeFromGameState();
 
-  CBitStreamWriter w(x30_systemData, 174);
+  CBitStreamWriter w(x30_systemData.data(), x30_systemData.size());
   g_GameState->PutTo(w);
 }
 
@@ -674,15 +680,18 @@ void CMemoryCardDriver::InitializeFileInfo() {
   CMemoryOutStream w = x198_fileInfo->BeginMemoryOut(3004);
 
   SSaveHeader header;
-  for (int i = 0; i < 3; ++i)
+  for (size_t i = 0; i < xe4_fileSlots.size(); ++i) {
-    header.x4_savePresent[i] = xe4_fileSlots[i].operator bool();
+    header.x4_savePresent[i] = xe4_fileSlots[i] != nullptr;
+  }
   header.DoPut(w);
 
-  w.writeBytes(x30_systemData, 174);
+  w.writeBytes(x30_systemData.data(), x30_systemData.size());
 
-  for (int i = 0; i < 3; ++i)
+  for (auto& fileSlot : xe4_fileSlots) {
-    if (xe4_fileSlots[i])
+    if (fileSlot) {
-      xe4_fileSlots[i]->DoPut(w);
+      fileSlot->DoPut(w);
+    }
+  }
 }
 
 void CMemoryCardDriver::WriteBackupBuf() {

Runtime/MP1/CMemoryCardDriver.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <array>
 #include <memory>
 #include <string>
 #include <vector>
@@ -87,22 +88,25 @@ private:
 
   struct SSaveHeader {
     u32 x0_version = 0;
-    bool x4_savePresent[3];
+    std::array<bool, 3> x4_savePresent{};
+
     void DoPut(CMemoryOutStream& out) const {
       out.writeUint32Big(x0_version);
-      for (int i = 0; i < 3; ++i)
+      for (const bool savePresent : x4_savePresent) {
-        out.writeBool(x4_savePresent[i]);
+        out.writeBool(savePresent);
+      }
     }
   };
 
   struct SGameFileSlot {
-    u8 x0_saveBuffer[940] = {};
+    std::array<u8, 940> x0_saveBuffer{};
     CGameState::GameFileStateInfo x944_fileInfo;
+
     SGameFileSlot();
     explicit SGameFileSlot(CMemoryInStream& in);
     void InitializeFromGameState();
     void LoadGameState(u32 idx);
-    void DoPut(CMemoryOutStream& w) const { w.writeBytes(x0_saveBuffer, 940); }
+    void DoPut(CMemoryOutStream& w) const { w.writeBytes(x0_saveBuffer.data(), x0_saveBuffer.size()); }
   };
 
   enum class EFileState { Unknown, NoFile, File, BadFile };
@@ -117,8 +121,8 @@ private:
   s32 x1c_cardFreeFiles = 0;
   u32 x20_fileTime = 0;
   u64 x28_cardSerial = 0;
-  u8 x30_systemData[174] = {};
+  std::array<u8, 174> x30_systemData{};
-  std::unique_ptr<SGameFileSlot> xe4_fileSlots[3];
+  std::array<std::unique_ptr<SGameFileSlot>, 3> xe4_fileSlots;
   std::vector<std::pair<EFileState, SFileInfo>> x100_mcFileInfos;
   u32 x194_fileIdx = -1;
   std::unique_ptr<CMemoryCardSys::CCardFileInfo> x198_fileInfo;