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52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
//
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// HDV.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 14/11/2022.
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// Copyright © 2022 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include "../MassStorageDevice.hpp"
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#include "../../FileHolder.hpp"
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#include "../Encodings/AppleIIVolume.hpp"
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#include <limits>
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#include <vector>
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namespace Storage::MassStorage {
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/*!
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Provides a @c MassStorageDevice containing an HDV image, which is a sector dump of
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the ProDOS volume of an Apple II drive.
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*/
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class HDV: public MassStorageDevice {
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public:
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/*!
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Constructs an HDV with the contents of the file named @c file_name within
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the range given.
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Raises an exception if the file name doesn't appear to identify a valid
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Apple II mass storage image.
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*/
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HDV(const std::string &file_name, long start = 0, long size = std::numeric_limits<long>::max());
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private:
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FileHolder file_;
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long file_start_, image_size_;
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Storage::MassStorage::Encodings::AppleII::Mapper mapper_;
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/// @returns -1 if @c address is out of range; the offset into the file at which
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/// the block for @c address resides otherwise.
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long offset_for_block(ssize_t address);
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/* MassStorageDevices overrides. */
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size_t get_block_size() final;
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size_t get_number_of_blocks() final;
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std::vector<uint8_t> get_block(size_t address) final;
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void set_block(size_t address, const std::vector<uint8_t> &) final;
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};
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}
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