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42 lines
946 B
C++
42 lines
946 B
C++
//
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// DAT.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 31/01/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#include "DAT.hpp"
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using namespace Storage::MassStorage;
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DAT::DAT(const std::string &file_name) : file_(file_name) {
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// Is the file a multiple of 256 bytes in size?
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const auto file_size = file_.stats().st_size;
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if(file_size & 255) throw std::exception();
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// Does it contain the 'Hugo' signature?
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file_.seek(0x201, SEEK_SET);
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if(!file_.check_signature("Hugo")) {
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throw std::exception();
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}
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}
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size_t DAT::get_block_size() {
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return 256;
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}
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size_t DAT::get_number_of_blocks() {
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return size_t(file_.stats().st_size) / 256;
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}
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std::vector<uint8_t> DAT::get_block(size_t address) {
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file_.seek(long(address * 256), SEEK_SET);
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return file_.read(256);
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}
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void DAT::set_block(size_t address, const std::vector<uint8_t> &contents) {
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file_.seek(long(address * 256), SEEK_SET);
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file_.write(contents);
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}
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