TVirtualDiskImage

Return to Unit VirtualDisk

Description

---

To be documented

Class definitions

---

TVirtualDiskImage = class(TDiskImage)

constructor Create(ADriver:TFileSysDriver; AController:TDiskController; const AName:String; AImageNo:Integer);
destructor Destroy; override;
private
protected
FFlags:LongWord;
FExtents:TFileSysList;	List of Virtual Disk Extents
FBase:TVirtualDiskExtent;	The first extent of the image
FCurrent:TVirtualDiskExtent;	The current delta extent if applicable
function GetCylinders:LongWord; override;
function GetHeads:LongWord; override;
function GetSectors:LongWord; override;
function ReadExtent(AExtent:TVirtualDiskExtent; ASector:LongWord; ACount:Word; var ABuffer):Word; virtual;
function WriteExtent(AExtent:TVirtualDiskExtent; ASector:LongWord; ACount:Word; const ABuffer):Word; virtual;
function LoadExtents:Boolean; virtual;
function CloseExtents:Boolean; virtual;
function CheckExtent(ADelta,AParent:TVirtualDiskExtent; const AFilename:String):Boolean; virtual;
function LoadExtent(ADelta,AParent:TVirtualDiskExtent; const AFilename:String):TVirtualDiskExtent; virtual;
function AddExtent(AParent:TVirtualDiskExtent; const AFilename:String):TVirtualDiskExtent; virtual;
function RemoveExtent(AExtent:TVirtualDiskExtent):Boolean; virtual;
function SetExtent(AExtent:TVirtualDiskExtent):Boolean; virtual;
function GetExtent(const ASector:Int64; AWrite,ALock:Boolean):TVirtualDiskExtent; virtual;
function FindExtent(const AFilename:String; ALock:Boolean):TVirtualDiskExtent; virtual;
function LoadTables:Boolean; virtual;
function LoadTable(AExtent:TVirtualDiskExtent; ATableNo:LongWord):TVirtualDiskTable; virtual;
function AddTable(AExtent:TVirtualDiskExtent):TVirtualDiskTable; virtual;
function RemoveTable(ATable:TVirtualDiskTable):Boolean; virtual;
function SetTable(ATable:TVirtualDiskTable):Boolean; virtual;
function GetTable(AExtent:TVirtualDiskExtent; const ASector:Int64; AWrite:Boolean):TVirtualDiskTable; virtual;
function LoadBlocks(ATable:TVirtualDiskTable):Boolean; virtual;
function LoadBlock(ATable:TVirtualDiskTable; ABlockNo:LongWord):TVirtualDiskBlock; virtual;
function AddBlock(ATable:TVirtualDiskTable):TVirtualDiskBlock; virtual;
function RemoveBlock(ABlock:TVirtualDiskBlock):Boolean; virtual;
function SetBlock(ABlock:TVirtualDiskBlock):Boolean; virtual;
function GetBlock(ATable:TVirtualDiskTable; const ASector:Int64; AWrite:Boolean):TVirtualDiskBlock; virtual;
function LocateDelta(AExtent:TVirtualDiskExtent):String; virtual;
function LocateParent(AExtent:TVirtualDiskExtent):String; virtual;
function LocateSibling(AExtent:TVirtualDiskExtent):String; virtual;
public
property Flags:LongWord read FFlags write FFlags;
property Extents:TFileSysList read FExtents;
property Base:TVirtualDiskExtent read FBase;
property Current:TVirtualDiskExtent read FCurrent;
function IsSplit:Boolean; virtual;

Function declarations

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constructor TVirtualDiskImage.Create(ADriver:TFileSysDriver; AController:TDiskController; const AName:String; AImageNo:Integer);

Description: To be documented

Note	None documented

destructor TVirtualDiskImage.Destroy;

Description: To be documented

Note	None documented

function TVirtualDiskImage.GetCylinders:LongWord;

Description: To be documented

Note	None documented

function TVirtualDiskImage.GetHeads:LongWord;

Description: To be documented

Note	None documented

function TVirtualDiskImage.GetSectors:LongWord;

Description: To be documented

Note	None documented

function TVirtualDiskImage.ReadExtent(AExtent:TVirtualDiskExtent; ASector:LongWord;ACount:Word; var ABuffer):Word;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.WriteExtent(AExtent:TVirtualDiskExtent; ASector:LongWord; ACount:Word; const ABuffer):Word;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LoadExtents:Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.CloseExtents:Boolean;

Description: To be documented

Note	None documented

function TVirtualDiskImage.CheckExtent(ADelta,AParent:TVirtualDiskExtent; const AFilename:String):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LoadExtent(ADelta,AParent:TVirtualDiskExtent; const AFilename:String):TVirtualDiskExtent;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.AddExtent(AParent:TVirtualDiskExtent; const AFilename:String):TVirtualDiskExtent;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.RemoveExtent(AExtent:TVirtualDiskExtent):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.SetExtent(AExtent:TVirtualDiskExtent):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.GetExtent(const ASector:Int64; AWrite,ALock:Boolean):TVirtualDiskExtent;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.FindExtent(const AFilename:String; ALock:Boolean):TVirtualDiskExtent;

Description: To be documented

Note	None documented

function TVirtualDiskImage.LoadTables:Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LoadTable(AExtent:TVirtualDiskExtent; ATableNo:LongWord):TVirtualDiskTable;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.AddTable(AExtent:TVirtualDiskExtent):TVirtualDiskTable;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.RemoveTable(ATable:TVirtualDiskTable):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.SetTable(ATable:TVirtualDiskTable):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.GetTable(AExtent:TVirtualDiskExtent; const ASector:Int64; AWrite:Boolean):TVirtualDiskTable;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LoadBlocks(ATable:TVirtualDiskTable):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LoadBlock(ATable:TVirtualDiskTable; ABlockNo:LongWord):TVirtualDiskBlock;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.AddBlock(ATable:TVirtualDiskTable):TVirtualDiskBlock;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.RemoveBlock(ABlock:TVirtualDiskBlock):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.SetBlock(ABlock:TVirtualDiskBlock):Boolean;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.GetBlock(ATable:TVirtualDiskTable; const ASector:Int64; AWrite:Boolean):TVirtualDiskBlock;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LocateDelta(AExtent:TVirtualDiskExtent):String;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LocateParent(AExtent:TVirtualDiskExtent):String;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.LocateSibling(AExtent:TVirtualDiskExtent):String;

Description: To be documented

Note	Virtual Base Method

function TVirtualDiskImage.IsSplit:Boolean;

Description: To be documented

Note	None documented

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