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294e09f275
At least for the purpose of being communicative. I doubt there's much to gain in terms of compiler output — the DiskImageHolder can avoid some virtual lookups but nothing else leaps out.
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
//
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// MacintoshIMG.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 02/06/2019.
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// Copyright © 2019 Thomas Harte. All rights reserved.
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//
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#ifndef MacintoshIMG_hpp
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#define MacintoshIMG_hpp
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#include "../DiskImage.hpp"
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#include "../../../FileHolder.hpp"
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namespace Storage {
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namespace Disk {
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/*!
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Provides a @c DiskImage containing either:
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* a disk imaged by Apple's Disk Copy 4.2: sector contents (optionally plus tag data),
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in either an Apple GCR or standard MFM encoding; or
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* a raw sector dump of a Macintosh GCR disk.
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*/
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class MacintoshIMG: public DiskImage {
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public:
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/*!
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Construct a @c DiskCopy42 containing content from the file with name @c file_name.
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@throws Error::InvalidFormat if this file doesn't appear to be in Disk Copy 4.2 format.
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*/
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MacintoshIMG(const std::string &file_name);
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// implemented to satisfy @c Disk
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HeadPosition get_maximum_head_position() final;
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int get_head_count() final;
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bool get_is_read_only() final;
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std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) final;
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void set_tracks(const std::map<Track::Address, std::shared_ptr<Track>> &tracks) final;
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private:
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Storage::FileHolder file_;
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enum class Encoding {
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GCR400,
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GCR800,
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MFM720,
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MFM1440
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} encoding_;
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uint8_t format_;
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std::vector<uint8_t> data_;
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std::vector<uint8_t> tags_;
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bool is_diskCopy_file_ = false;
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std::mutex buffer_mutex_;
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uint32_t checksum(const std::vector<uint8_t> &, size_t bytes_to_skip = 0);
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};
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}
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}
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#endif /* DiskCopy42_hpp */
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