mirror of
https://github.com/davidgiven/fluxengine.git
synced 2025-10-31 11:17:01 -07:00
113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
#ifndef LAYOUT_H
|
|
#define LAYOUT_H
|
|
|
|
#include "lib/flux.h"
|
|
|
|
class SectorListProto;
|
|
class TrackInfo;
|
|
|
|
class Layout
|
|
{
|
|
public:
|
|
/* Translates logical track numbering (the numbers actually written in the
|
|
* sector headers) to the track numbering on the actual drive, taking into
|
|
* account tpi settings.
|
|
*/
|
|
static unsigned remapTrackPhysicalToLogical(unsigned physicalTrack);
|
|
static unsigned remapTrackLogicalToPhysical(unsigned logicalTrack);
|
|
|
|
/* Translates logical side numbering (the numbers actually written in the
|
|
* sector headers) to the sides used on the actual drive.
|
|
*/
|
|
static unsigned remapSidePhysicalToLogical(unsigned physicalSide);
|
|
static unsigned remapSideLogicalToPhysical(unsigned logicalSide);
|
|
|
|
/* Uses the layout and current track and heads settings to determine
|
|
* which Locations are going to be read from or written to.
|
|
*/
|
|
static std::vector<std::shared_ptr<const TrackInfo>> computeLocations();
|
|
|
|
/* Given a list of locations, determines the minimum and maximum track
|
|
* and side settings. */
|
|
static void getBounds(
|
|
const std::vector<std::shared_ptr<const TrackInfo>>& locations,
|
|
int& minTrack,
|
|
int& maxTrack,
|
|
int& minSide,
|
|
int& maxSide);
|
|
|
|
/* Returns a series of <track, side> pairs representing the filesystem
|
|
* ordering of the disk, in logical numbers. */
|
|
static std::vector<std::pair<int, int>> getTrackOrdering(
|
|
unsigned guessedTracks = 0, unsigned guessedSides = 0);
|
|
|
|
/* Returns the layout of a given track. */
|
|
static std::shared_ptr<const TrackInfo> getLayoutOfTrack(
|
|
unsigned logicalTrack, unsigned logicalHead);
|
|
|
|
/* Returns the layout of a given track via physical location. */
|
|
static std::shared_ptr<const TrackInfo> getLayoutOfTrackPhysical(
|
|
unsigned physicalTrack, unsigned physicalSide);
|
|
|
|
/* Expand a SectorList into the actual sector IDs. */
|
|
static std::vector<unsigned> expandSectorList(
|
|
const SectorListProto& sectorsProto);
|
|
};
|
|
|
|
class TrackInfo
|
|
{
|
|
public:
|
|
TrackInfo() {}
|
|
|
|
private:
|
|
/* Can't copy. */
|
|
TrackInfo(const TrackInfo&);
|
|
TrackInfo& operator=(const TrackInfo&);
|
|
|
|
public:
|
|
unsigned numTracks = 0;
|
|
unsigned numSides = 0;
|
|
|
|
/* The number of sectors in this track. */
|
|
unsigned numSectors = 0;
|
|
|
|
/* Physical location of this track. */
|
|
unsigned physicalTrack = 0;
|
|
|
|
/* Physical side of this track. */
|
|
unsigned physicalSide = 0;
|
|
|
|
/* Logical location of this track. */
|
|
unsigned logicalTrack = 0;
|
|
|
|
/* Logical side of this track. */
|
|
unsigned logicalSide = 0;
|
|
|
|
/* The number of physical tracks which need to be written for one logical
|
|
* track. */
|
|
unsigned groupSize = 0;
|
|
|
|
/* Number of bytes in a sector. */
|
|
unsigned sectorSize = 0;
|
|
|
|
/* Sector IDs in sector ID order. This is the order in which the appear in
|
|
* disk images. */
|
|
std::vector<unsigned> naturalSectorOrder;
|
|
|
|
/* Sector IDs in disk order. This is the order they are written to the disk.
|
|
*/
|
|
std::vector<unsigned> diskSectorOrder;
|
|
|
|
/* Sector IDs in filesystem order. This is the order in which the filesystem
|
|
* uses them. */
|
|
std::vector<unsigned> filesystemSectorOrder;
|
|
|
|
/* Mapping of filesystem order to natural order. */
|
|
std::map<unsigned, unsigned> filesystemToNaturalSectorMap;
|
|
|
|
/* Mapping of natural order to filesystem order. */
|
|
std::map<unsigned, unsigned> naturalToFilesystemSectorMap;
|
|
};
|
|
|
|
#endif
|