EightBit/inc/UnusedMemory.h

33 lines
969 B
C++

#pragma once
#include <cstdint>
#include <fstream>
#include <string>
#include <vector>
#include "Memory.h"
namespace EightBit {
// A read-only Memory implementation that has a fixed size and will
// *always* returns the same value, from whichever location
// is being read.
class UnusedMemory final : public Memory {
public:
UnusedMemory(uint16_t size, uint8_t value) noexcept;
~UnusedMemory() = default;
[[nodiscard]] uint16_t size() const noexcept final;
[[nodiscard]] uint8_t peek(uint16_t address) const noexcept final;
int load(std::ifstream& file, int writeOffset = 0, int readOffset = 0, int limit = -1) final;
int load(std::string path, int writeOffset = 0, int readOffset = 0, int limit = -1) final;
int load(const std::vector<uint8_t>& bytes, int writeOffset = 0, int readOffset = 0, int limit = -1) final;
protected:
void poke(uint16_t address, uint8_t value) noexcept final;
private:
uint16_t m_size;
uint8_t m_value;
};
}