EightBit/inc/Memory.h
2021-07-18 14:28:40 +01:00

35 lines
1.1 KiB
C++

#pragma once
#include <cstdint>
#include <fstream>
#include <string>
#include <vector>
namespace EightBit {
// Memory is:
// *) Definitely has a size
// *) Probably 'peek'able (although you might not like the answer you get!)
// *) Probably 'load'able (i.e. able to be externally initialised)
// *) At the implementation level, probably 'poke'able (although may not be exposed to users)
// *) Possibly 'reference'able (Very likely if you've exposed 'poke')
class Memory {
public:
virtual ~Memory() {};
[[nodiscard]] virtual size_t size() const noexcept = 0;
[[nodiscard]] virtual uint8_t peek(uint16_t address) const noexcept = 0;
[[nodiscard]] virtual uint8_t& reference(uint16_t) noexcept;
virtual int load(std::ifstream& file, int writeOffset = 0, int readOffset = 0, int limit = -1) = 0;
virtual int load(std::string path, int writeOffset = 0, int readOffset = 0, int limit = -1) = 0;
virtual int load(const std::vector<uint8_t>& bytes, int writeOffset = 0, int readOffset = 0, int limit = -1) = 0;
protected:
virtual void poke(uint16_t address, uint8_t value) noexcept = 0;
private:
uint8_t m_delivered = 0xff;
};
}