Mesen-SX/Core/GsuRamHandler.h

#pragma once
#include "stdafx.h"
#include "IMemoryHandler.h"
#include "GsuTypes.h"

class GsuRamHandler : public IMemoryHandler
{
private:
	GsuState* _state;
	IMemoryHandler* _handler;

public:
	GsuRamHandler(GsuState& state, IMemoryHandler* handler) : IMemoryHandler(SnesMemoryType::GsuWorkRam)
	{
		_handler = handler;
		_state = &state;
	}

	uint8_t Read(uint32_t addr) override
	{
		if (!_state->SFR.Running || !_state->GsuRamAccess)
		{
			return _handler->Read(addr);
		}

		//TODO: open bus
		return 0;
	}

	uint8_t Peek(uint32_t addr) override
	{
		return Read(addr);
	}

	void PeekBlock(uint32_t addr, uint8_t* output) override
	{
		for (int i = 0; i < 0x1000; i++)
		{
			output[i] = Read(i);
		}
	}

	void Write(uint32_t addr, uint8_t value) override
	{
		if (!_state->SFR.Running || !_state->GsuRamAccess)
		{
			_handler->Write(addr, value);
		}
	}

	AddressInfo GetAbsoluteAddress(uint32_t address) override
	{
		if (!_state->SFR.Running || !_state->GsuRamAccess)
		{
			return _handler->GetAbsoluteAddress(address);
		}
		else
		{
			return {-1, SnesMemoryType::Register};
		}
	}
};