public void Format(DiskDriver disk)
{
//wipe the disk
FREE_SECTOR freeSector = new FREE_SECTOR(disk.BytesPerSector);
for (int i = 0; i < disk.SectorCount; i++)
{
disk.WriteSector(i, freeSector.RawBytes);
}
//format it
DRIVE_INFO driveInfo = new DRIVE_INFO(disk.BytesPerSector, Constants.ROOT_DIR_SECTOR);
disk.WriteSector(Constants.DRIVE_INFO_SECTOR, driveInfo.RawBytes);
DIR_NODE rootNode = new DIR_NODE(disk.BytesPerSector, Constants.ROOT_DATA_SECTOR, "/", 0);
disk.WriteSector(Constants.ROOT_DIR_SECTOR, rootNode.RawBytes);
DATA_SECTOR rootData = new DATA_SECTOR(disk.BytesPerSector, 0, new byte[1]);
disk.WriteSector(Constants.ROOT_DATA_SECTOR, rootData.RawBytes);
}
static void TestPhysicalFileSystem()
{
SlowDisk disk = new SlowDisk(1);
disk.TurnOn();
int SECTOR_SIZE = disk.BytesPerSector;
//free sector
{
FREE_SECTOR freeWrite = new FREE_SECTOR(disk.BytesPerSector);
disk.WriteSector(0, freeWrite.RawBytes);
FREE_SECTOR freeRead = FREE_SECTOR.CreateFromBytes(disk.ReadSector(0));
CheckSectorBytes(freeWrite, freeRead);
}
//drive info
{
DRIVE_INFO driveWrite = new DRIVE_INFO(disk.BytesPerSector, 101);
disk.WriteSector(1, driveWrite.RawBytes);
DRIVE_INFO driveRead = DRIVE_INFO.CreateFromBytes(disk.ReadSector(1));
CheckSectorBytes(driveWrite, driveRead);
}
//dir node
{
DIR_NODE dirWrite = new DIR_NODE(disk.BytesPerSector, 103, "dir1", 10);
disk.WriteSector(2, dirWrite.RawBytes);
DIR_NODE dirRead = DIR_NODE.CreateFromBytes(disk.ReadSector(2));
CheckSectorBytes(dirWrite, dirRead);
}
//file node
{
FILE_NODE fileWrite = new FILE_NODE(disk.BytesPerSector, 104, "file1", 100);
disk.WriteSector(3, fileWrite.RawBytes);
FILE_NODE fileRead = FILE_NODE.CreateFromBytes(disk.ReadSector(3));
CheckSectorBytes(fileWrite, fileRead);
}
//data sector
{
byte[] testData = new byte[DATA_SECTOR.MaxDataLength(disk.BytesPerSector)];
for (int i = 0; i < testData.Length; i++)
{
testData[i] = (byte)(i + 1);
}
DATA_SECTOR dataWrite = new DATA_SECTOR(disk.BytesPerSector, 105, testData);
disk.WriteSector(4, dataWrite.RawBytes);
DATA_SECTOR dataRead = DATA_SECTOR.CreateFromBytes(disk.ReadSector(4));
CheckSectorBytes(dataWrite, dataRead);
}
disk.TurnOff();
}
public void Delete()
{
if (mParent == null)
{
throw new Exception("Cannot delete root node");
}
//we need to do cleanup if we are a dir
if (IsDirectory)
{
LoadChildren();
foreach (var child in mChildren)
{
//recursive delete call to free
child.Value.Delete();
}
}
mParent.LoadChildren();
mParent.mChildren.Remove(this.Name);
mParent.CommitChildren();
//free sector to wipe with
FREE_SECTOR freeSector = new FREE_SECTOR(mDrive.Disk.BytesPerSector);
//start at first data
int sectorIndex = mSector.FirstDataAt;
while (sectorIndex != 0)
{
//store what will be next sector...
int nextsector = 0;
//get sector
DATA_SECTOR currentSector = DATA_SECTOR.CreateFromBytes(mDrive.Disk.ReadSector(sectorIndex));
nextsector = currentSector.NextSectorAt;
//wipe sector
mDrive.Disk.WriteSector(sectorIndex, freeSector.RawBytes);
//point to next sector
sectorIndex = nextsector;
}
;
//wipe main sector
mDrive.Disk.WriteSector(mNodeSector, freeSector.RawBytes);
}