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54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
#pragma once
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#include <cstdint>
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#include <vector>
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#include <string>
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#include <fstream>
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namespace EightBit {
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class Memory {
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public:
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static int load(std::ifstream& file, std::vector<uint8_t>& output, int writeOffset = 0, int readOffset = 0, int limit = -1, int maximumSize = -1);
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static int load(const std::string& path, std::vector<uint8_t>& output, int writeOffset = 0, int readOffset = 0, int limit = -1, int maximumSize = -1);
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Memory(const size_t size = 0) noexcept
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: m_bytes(size) {
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}
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size_t size() const { return m_bytes.size(); }
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int load(std::ifstream& file, const int writeOffset = 0, const int readOffset = 0, const int limit = -1) {
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const auto maximumSize = (int)m_bytes.size() - writeOffset;
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return load(file, m_bytes, writeOffset, readOffset, limit, maximumSize);
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}
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int load(const std::string& path, const int writeOffset = 0, const int readOffset = 0, const int limit = -1) {
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const auto maximumSize = (int)m_bytes.size() - writeOffset;
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return load(path, m_bytes, writeOffset, readOffset, limit, maximumSize);
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}
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int load(const std::vector<uint8_t>& bytes, const int writeOffset = 0, const int readOffset = 0, int limit = -1) {
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if (limit < 0)
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limit = (int)bytes.size() - readOffset;
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std::copy(bytes.cbegin() + readOffset, bytes.cbegin() + limit, m_bytes.begin() + writeOffset);
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return limit;
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}
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uint8_t peek(const uint16_t address) {
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return BYTES()[address];
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}
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protected:
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std::vector<uint8_t>& BYTES() { return m_bytes; }
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void poke(const uint16_t address, const uint8_t value) {
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BYTES()[address] = value;
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}
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private:
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std::vector<uint8_t> m_bytes;
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};
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typedef Memory Rom;
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}
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