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CLK/Storage/Disk/DiskImage/Formats/MacintoshIMG.hpp
2020-11-24 18:19:34 -05:00

80 lines
2.1 KiB
C++

//
// MacintoshIMG.hpp
// Clock Signal
//
// Created by Thomas Harte on 02/06/2019.
// Copyright © 2019 Thomas Harte. All rights reserved.
//
#ifndef MacintoshIMG_hpp
#define MacintoshIMG_hpp
#include "../DiskImage.hpp"
#include "../../../FileHolder.hpp"
namespace Storage {
namespace Disk {
/*!
Provides a @c DiskImage containing either:
* a disk imaged by Apple's Disk Copy 4.2: sector contents (optionally plus tag data),
in either an Apple GCR or standard MFM encoding; or
* a raw sector dump of a Macintosh GCR disk.
*/
class MacintoshIMG: public DiskImage {
public:
/*!
Construct a @c MacintoshIMG containing content from the file with name @c file_name.
@throws Error::InvalidFormat if this file doesn't appear to be in Disk Copy 4.2 format.
*/
MacintoshIMG(const std::string &file_name);
enum class FixedType {
GCR
};
/*!
Constructs a @c MacintoshIMG without attempting to autodetect whether this is a raw
image or a Disk Copy 4.2 image; if GCR is specified and the file size checks out then
it is accepted as a GCR image.
If @c offset and @c length are specified and non-zero, only that portion of the file
will be modified.
*/
MacintoshIMG(const std::string &file_name, FixedType type, size_t offset = 0, off_t length = -1);
// implemented to satisfy @c Disk
HeadPosition get_maximum_head_position() final;
int get_head_count() final;
bool get_is_read_only() final;
std::shared_ptr<::Storage::Disk::Track> get_track_at_position(::Storage::Disk::Track::Address address) final;
void set_tracks(const std::map<Track::Address, std::shared_ptr<Track>> &tracks) final;
private:
Storage::FileHolder file_;
enum class Encoding {
GCR400,
GCR800,
MFM720,
MFM1440
} encoding_;
uint8_t format_;
std::vector<uint8_t> data_;
std::vector<uint8_t> tags_;
bool is_diskCopy_file_ = false;
std::mutex buffer_mutex_;
uint32_t checksum(const std::vector<uint8_t> &, size_t bytes_to_skip = 0);
void construct_raw_gcr(size_t offset, off_t length);
long raw_offset_ = 0;
};
}
}
#endif /* DiskCopy42_hpp */