Cart refactor (#1073)

complete cart-interface refactor, will make this code a lot easier to deal with

src/GBACart.h

@@ -22,39 +22,128 @@
 #include "types.h"
 #include "Savestate.h"
 
-
-namespace GBACart_SRAM
-{
-
-extern u8* SRAM;
-extern u32 SRAMLength;
-
-void Reset();
-void DoSavestate(Savestate* file);
-
-u8 Read8(u32 addr);
-u16 Read16(u32 addr);
-u32 Read32(u32 addr);
-
-void Write8(u32 addr, u8 val);
-void Write16(u32 addr, u16 val);
-void Write32(u32 addr, u32 val);
-
-}
-
-
 namespace GBACart
 {
 
-struct GPIO
+// CartCommon -- base code shared by all cart types
+class CartCommon
 {
-    u16 data;
-    u16 direction;
-    u16 control;
+public:
+    CartCommon();
+    virtual ~CartCommon();
+
+    virtual void DoSavestate(Savestate* file);
+
+    virtual void LoadSave(const char* path, u32 type);
+    virtual void RelocateSave(const char* path, bool write);
+
+    virtual int SetInput(int num, bool pressed);
+
+    virtual u16 ROMRead(u32 addr);
+    virtual void ROMWrite(u32 addr, u16 val);
+
+    virtual u8 SRAMRead(u32 addr);
+    virtual void SRAMWrite(u32 addr, u8 val);
+};
+
+// CartGame -- regular retail game cart (ROM, SRAM)
+class CartGame : public CartCommon
+{
+public:
+    CartGame(u8* rom, u32 len);
+    virtual ~CartGame() override;
+
+    virtual void DoSavestate(Savestate* file) override;
+
+    virtual void LoadSave(const char* path, u32 type) override;
+    virtual void RelocateSave(const char* path, bool write) override;
+
+    virtual u16 ROMRead(u32 addr) override;
+    virtual void ROMWrite(u32 addr, u16 val) override;
+
+    virtual u8 SRAMRead(u32 addr) override;
+    virtual void SRAMWrite(u32 addr, u8 val) override;
+
+protected:
+    virtual void ProcessGPIO();
+
+    u8 SRAMRead_EEPROM(u32 addr);
+    void SRAMWrite_EEPROM(u32 addr, u8 val);
+    u8 SRAMRead_FLASH(u32 addr);
+    void SRAMWrite_FLASH(u32 addr, u8 val);
+    u8 SRAMRead_SRAM(u32 addr);
+    void SRAMWrite_SRAM(u32 addr, u8 val);
+
+    u8* ROM;
+    u32 ROMLength;
+
+    struct
+    {
+        u16 data;
+        u16 direction;
+        u16 control;
+
+    } GPIO;
+
+    enum SaveType
+    {
+        S_NULL,
+        S_EEPROM4K,
+        S_EEPROM64K,
+        S_SRAM256K,
+        S_FLASH512K,
+        S_FLASH1M
+    };
+
+    // from DeSmuME
+    struct
+    {
+        u8 state;
+        u8 cmd;
+        u8 device;
+        u8 manufacturer;
+        u8 bank;
+
+    } SRAMFlashState;
+
+    u8* SRAM;
+    FILE* SRAMFile;
+    u32 SRAMLength;
+    SaveType SRAMType;
+
+    char SRAMPath[1024];
+};
+
+// CartGameSolarSensor -- Boktai game cart
+class CartGameSolarSensor : public CartGame
+{
+public:
+    CartGameSolarSensor(u8* rom, u32 len);
+    virtual ~CartGameSolarSensor() override;
+
+    virtual void DoSavestate(Savestate* file) override;
+
+    virtual int SetInput(int num, bool pressed) override;
+
+private:
+    virtual void ProcessGPIO() override;
+
+    static const int kLuxLevels[11];
+
+    bool LightEdge;
+    u8 LightCounter;
+    u8 LightSample;
+    u8 LightLevel;
+};
+
+// possible inputs for GBA carts that might accept user input
+enum
+{
+    Input_SolarSensorDown = 0,
+    Input_SolarSensorUp,
 };
 
 extern bool CartInserted;
-extern bool HasSolarSensor;
 extern u8* CartROM;
 extern u32 CartROMSize;
 extern u32 CartCRC;
@@ -69,19 +158,14 @@ bool LoadROM(const char* path, const char* sram);
 bool LoadROM(const u8* romdata, u32 filelength, const char *sram);
 void RelocateSave(const char* path, bool write);
 
-void WriteGPIO(u32 addr, u16 val);
+// TODO: make more flexible, support nonbinary inputs
+int SetInput(int num, bool pressed);
 
-}
+u16 ROMRead(u32 addr);
+void ROMWrite(u32 addr, u16 val);
 
-
-namespace GBACart_SolarSensor
-{
-
-extern u8 LightLevel;
-
-void Reset();
-void DoSavestate(Savestate* file);
-void Process(GBACart::GPIO* gpio);
+u8 SRAMRead(u32 addr);
+void SRAMWrite(u32 addr, u8 val);
 
 }