Add system for adjusting addresses for autoload (#118) Fixes #41

arm9/source/AutoloadAdjuster.h

@@ -0,0 +1,59 @@
+#pragma once
+#include "common.h"
+#include "moduleParams.h"
+#include "IAutoloadAdjuster.h"
+
+/// @brief Class for adjusting addresses for autoload from autoload list entries.
+/// @tparam T The type of autoload list entry.
+template<typename T>
+class AutoloadAdjuster : public IAutoloadAdjuster
+{
+public:
+    AutoloadAdjuster(const T* autoloadListStart, const T* autoloadListEnd, u32 autoloadStartAddress)
+        : _autoloadListStart(autoloadListStart), _autoloadListEnd(autoloadListEnd), _autoloadStartAddress(autoloadStartAddress) { }
+
+    u32 AdjustInitialToFinal(u32 initialAddress) const override
+    {
+        u32 finalAddress = initialAddress;
+        u32 currentAddress = _autoloadStartAddress;
+        for (auto autoloadListCurr = _autoloadListStart; autoloadListCurr != _autoloadListEnd; autoloadListCurr++)
+        {
+            if (initialAddress >= currentAddress && initialAddress < currentAddress + autoloadListCurr->size)
+            {
+                finalAddress -= currentAddress;
+                finalAddress += autoloadListCurr->targetAddress;
+                break;
+            }
+            else
+            {
+                currentAddress += autoloadListCurr->size;
+            }
+        }
+        return finalAddress;
+    }
+
+    u32 AdjustFinalToInitial(u32 finalAddress) const override
+    {
+        u32 initialAddress = finalAddress;
+        u32 currentAddress = _autoloadStartAddress;
+        for (auto autoloadListCurr = _autoloadListStart; autoloadListCurr != _autoloadListEnd; autoloadListCurr++)
+        {
+            if (finalAddress >= autoloadListCurr->targetAddress && finalAddress < autoloadListCurr->targetAddress + autoloadListCurr->size)
+            {
+                initialAddress -= autoloadListCurr->targetAddress;
+                initialAddress += currentAddress;
+                break;
+            }
+            else
+            {
+                currentAddress += autoloadListCurr->size;
+            }
+        }
+        return initialAddress;
+    }
+
+private:
+    const T* _autoloadListStart;
+    const T* _autoloadListEnd;
+    u32 _autoloadStartAddress;
+};