Initial work on implementing support for cheats

arm9/source/cheats/UsrCheatRepository.h

@@ -0,0 +1,25 @@
+#pragma once
+#include <memory>
+#include "fat/File.h"
+#include "ICheatRepository.h"
+#include "UsrCheatDat.h"
+
+class UsrCheatRepository : public ICheatRepository
+{
+public:
+    UsrCheatRepository(std::unique_ptr<File> usrCheatDatFile,
+        std::unique_ptr<usr_cheat_index_entry_t[]> sortedIndices, u32 numberOfIndices)
+        : _usrCheatFile(std::move(usrCheatDatFile))
+        , _sortedIndices(std::move(sortedIndices)), _numberOfIndices(numberOfIndices) { }
+
+    std::unique_ptr<GameCheats> GetCheatsForGame(u32 gameCode, u32 headerCrc32) const override;
+
+private:
+    std::unique_ptr<File> _usrCheatFile;
+    std::unique_ptr<usr_cheat_index_entry_t[]> _sortedIndices;
+    u32 _numberOfIndices;
+
+    const usr_cheat_index_entry_t* FindIndex(u32 gameCode, u32 headerCrc32) const;
+    void ParseCategory(CheatCategory& category, u8*& ptr) const;
+    void ParseCheat(Cheat& cheat, u8*& ptr) const;
+};