CLK/Storage/Disk/DiskImage/Formats/CPCDSK.hpp

//
//  CPCDSK.hpp
//  Clock Signal
//
//  Created by Thomas Harte on 05/08/2017.
//  Copyright 2017 Thomas Harte. All rights reserved.
//

#pragma once

#include "../DiskImage.hpp"
#include "../../../FileHolder.hpp"
#include "../../Encodings/MFM/Sector.hpp"

#include <string>
#include <vector>

namespace Storage::Disk {

/*!
	Provides a @c Disk containing an Amstrad CPC-type disk image: some arrangement of sectors with status bits.
*/
class CPCDSK: public DiskImage {
	public:
		/*!
			Construct a @c CPCDSK containing content from the file with name @c file_name.

			@throws Storage::FileHolder::Error::CantOpen if this file can't be opened.
			@throws Error::InvalidFormat if the file doesn't appear to contain an Acorn .ADF format image.
		*/
		CPCDSK(const std::string &file_name);

		// DiskImage interface.
		HeadPosition get_maximum_head_position() final;
		int get_head_count() final;
		bool get_is_read_only() final;
		void set_tracks(const std::map<::Storage::Disk::Track::Address, std::shared_ptr<::Storage::Disk::Track>> &tracks) final;
		std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) final;

	private:
		struct Track {
			uint8_t track;
			uint8_t side;
			enum class DataRate {
				Unknown, SingleOrDoubleDensity, HighDensity, ExtendedDensity
			} data_rate;
			enum class DataEncoding {
				Unknown, FM, MFM
			} data_encoding;
			uint8_t sector_length;
			uint8_t gap3_length;
			uint8_t filler_byte;

			struct Sector: public ::Storage::Encodings::MFM::Sector {
				uint8_t fdc_status1;
				uint8_t fdc_status2;
			};

			std::vector<Sector> sectors;
		};
		std::string file_name_;
		std::vector<std::unique_ptr<Track>> tracks_;
		std::size_t index_for_track(::Storage::Disk::Track::Address address);

		int head_count_;
		int head_position_count_;
		bool is_extended_;
		bool is_read_only_;
};

}