Getting memory pointer is a const now

source/nesInstanceBase.hpp

@@ -3,10 +3,6 @@
 #include "logger.hpp"
 #include "controller.hpp"
 
-#define _LOW_MEM_SIZE 0x800
-#define _HIGH_MEM_SIZE 0x2000
-#define _NAMETABLES_MEM_SIZE 0x1000
-
 // Size of image generated in graphics buffer
 static const uint16_t image_width = 256;
 static const uint16_t image_height = 240;
@@ -95,7 +91,8 @@ class NESInstanceBase
 
   // Virtual functions
 
-  virtual uint8_t *getLowMem() = 0;
+  virtual uint8_t *getLowMem() const = 0;
+  virtual size_t getLowMemSize() const = 0;
 
   virtual void serializeState(uint8_t *state) const = 0;
   virtual void deserializeState(const uint8_t *state) = 0;

source/quickNES/core

@@ -1 +1 @@
-Subproject commit c41d8eff29132553e374abc15108c552b6d4a942
+Subproject commit e35054dc19c94fcac9b8cfd2fbf5b33f8e1dfbde

source/quickNES/nesInstance.hpp

@@ -23,7 +23,8 @@ class NESInstance final : public NESInstanceBase
     register_mapper_70();
   }
 
-  uint8_t *getLowMem() override { return _nes.low_mem(); };
+  uint8_t *getLowMem() const override { return _nes.low_mem(); };
+  size_t getLowMemSize() const override { return 0x800; };
 
   void serializeState(uint8_t *state) const override
   {

source/quickerNES/core/emu.hpp

@@ -204,7 +204,9 @@ class Emu
   {
     low_mem_size = 0x800
   };
-  uint8_t *low_mem() { return emu.low_mem; }
+  
+  uint8_t *get_low_mem() const { return (uint8_t*)emu.low_mem; }
+  size_t get_low_mem_size() const { return low_mem_size; }
 
   // Optional 8K memory
   enum

source/quickerNES/nesInstance.hpp

@@ -9,7 +9,8 @@ class NESInstance final : public NESInstanceBase
 {
   public:
 
-  uint8_t *getLowMem() override { return _nes.low_mem(); };
+  uint8_t *getLowMem() const override { return _nes.get_low_mem(); };
+  size_t getLowMemSize() const override { return _nes.get_low_mem_size(); };
 
   void serializeState(uint8_t *state) const override {  _nes.serializeState(state); }
   void deserializeState(const uint8_t *state) override { _nes.deserializeState(state); }

source/utils.hpp

@@ -169,5 +169,5 @@ inline hash_t calculateMetroHash(uint8_t *data, size_t size)
 
 inline hash_t calculateStateHash(NESInstance* nes)
 {
-  return calculateMetroHash(nes->getLowMem(), _LOW_MEM_SIZE);
+  return calculateMetroHash(nes->getLowMem(), nes->getLowMemSize());
 }