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55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
//
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// RawSectorDump.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 01/05/2021.
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// Copyright © 2021 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "Storage/MassStorage/MassStorageDevice.hpp"
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#include "Storage/FileHolder.hpp"
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#include <cassert>
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namespace Storage::MassStorage {
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template <long sector_size> class RawSectorDump: public MassStorageDevice {
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public:
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RawSectorDump(const std::string &file_name, long offset = 0, long length = -1) :
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file_(file_name),
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file_size_((length == -1) ? long(file_.stats().st_size) : length),
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file_start_(offset)
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{
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// Is the file a multiple of sector_size bytes in size?
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if(file_size_ % sector_size) throw std::exception();
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}
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/* MassStorageDevices overrides. */
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size_t get_block_size() const final {
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return sector_size;
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}
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size_t get_number_of_blocks() const final {
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return size_t(file_size_ / sector_size);
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}
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std::vector<uint8_t> get_block(const size_t address) const final {
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file_.seek(file_start_ + long(address * sector_size), Whence::SET);
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return file_.read(sector_size);
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}
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void set_block(const size_t address, const std::vector<uint8_t> &contents) final {
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assert(contents.size() == sector_size);
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file_.seek(file_start_ + long(address * sector_size), Whence::SET);
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file_.write(contents);
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}
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private:
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mutable FileHolder file_;
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const long file_size_, file_start_;
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};
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}
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