public void Format(DiskDriver disk)
{
// wipe all sectors of disk and create minimum required DRIVE_INFO, DIR_NODE and DATA_SECTOR
FREE_SECTOR free = new FREE_SECTOR(disk.BytesPerSector);
for (int i = 0; i < disk.SectorCount; i++)
{
disk.WriteSector(i, free.RawBytes);
}
// DRIVE_INFO
DRIVE_INFO drive = new DRIVE_INFO(disk.BytesPerSector, ROOT_DIR_SECTOR);
disk.WriteSector(DRIVE_INFO_SECTOR, drive.RawBytes);
// DIR_NODE for root node
DIR_NODE rootDir = new DIR_NODE(disk.BytesPerSector, ROOT_DATA_SECTOR, FSConstants.PATH_SEPARATOR.ToString(), 0);
disk.WriteSector(ROOT_DIR_SECTOR, rootDir.RawBytes);
// DATA_SECTOR for root node
DATA_SECTOR data = new DATA_SECTOR(disk.BytesPerSector, 0, new byte[] { 0 });
disk.WriteSector(ROOT_DATA_SECTOR, data.RawBytes);
}
public void Format(DiskDriver disk)
{
// wipe all sectors of disk and create minimum required DRIVE_INFO, DIR_NODE and DATA_SECTOR
// Wipe all sectors (replace with "zeroes" are FREE_SECTOR)
int bps = disk.BytesPerSector;
FREE_SECTOR free = new FREE_SECTOR(bps);
for (int i = 0; i < disk.SectorCount; i++)
{
disk.WriteSector(i, free.RawBytes);
}
// Create DRIVE_INFO
DRIVE_INFO di = new DRIVE_INFO(bps, ROOT_DIR_SECTOR);
disk.WriteSector(DRIVE_INFO_SECTOR, di.RawBytes);
// Create and write the DIR_NODE for the root node...
DIR_NODE dn = new DIR_NODE(bps, ROOT_DATA_SECTOR, FSConstants.ROOT_DIR_NAME, 0);
disk.WriteSector(ROOT_DIR_SECTOR, dn.RawBytes);
// ... and an empty DATA_SECTOR
DATA_SECTOR ds = new DATA_SECTOR(bps, 0, null); // 0 = no next data sector, nul = empty set
disk.WriteSector(ROOT_DATA_SECTOR, ds.RawBytes);
}
public void Format(DiskDriver disk)
{
// wipe all sectors of disk and create minimum required DRIVE_INFO, DIR_NODE and DATA_SECTOR
//how many sectors
int numSectors = disk.SectorCount;
FREE_SECTOR freeSector = new FREE_SECTOR(disk.BytesPerSector);
for (int lba = 0; lba < numSectors; lba++)
{
disk.WriteSector(lba, freeSector.RawBytes);
}
DRIVE_INFO diSector1 = new DRIVE_INFO(disk.BytesPerSector, ROOT_DIR_SECTOR);
disk.WriteSector(0, diSector1.RawBytes);
DIR_NODE rootDirSector = new DIR_NODE(disk.BytesPerSector, ROOT_DATA_SECTOR, FSConstants.ROOT_DIR_NAME, 0);
disk.WriteSector(ROOT_DIR_SECTOR, rootDirSector.RawBytes);
DATA_SECTOR rootDataSector = new DATA_SECTOR(disk.BytesPerSector, 0, new byte[DATA_SECTOR.MaxDataLength(disk.BytesPerSector)]);
disk.WriteSector(ROOT_DATA_SECTOR, rootDataSector.RawBytes);
}
public void Delete()
{
if (IsDirectory)
{
//nuke children
LoadChildren();
foreach (VirtualNode child in children.Values.ToArray())
{
child.Delete();
}
CommitChildren();
}
// make sectors free!
//overwirte node sector
FREE_SECTOR freeSector = new FREE_SECTOR(drive.Disk.BytesPerSector);
drive.Disk.WriteSector(nodeSector, freeSector.RawBytes);
//overwrite data sectors
int lba = DataSectorAt;
while (lba != 0)
{
DATA_SECTOR dataSector = DATA_SECTOR.CreateFromBytes(drive.Disk.ReadSector(lba));
drive.Disk.WriteSector(lba, freeSector.RawBytes);
lba = dataSector.NextSectorAt;
}
// remove this node from it's parent node
parent.LoadChildren();
parent.children.Remove(Name);
parent.CommitChildren();
}
public void Delete()
{
/* make sectors free!
* - wipe data for this node from the disk
* - wipe this node from parent directory from the disk
* - remove this node from it's parent node
*/
// Don't try to nuke the root!
if (parent == null)
{
throw new Exception("Can't delete the root!");
}
// Recurse into directory contents and delete children
if (IsDirectory)
{
LoadChildren();
// Loop throught a copy of the children cahce and delete each
foreach (VirtualNode child in children.Values.ToArray())
{
child.Delete();
}
// NOTE: do not need to call CommitChildren();
}
// Replace data sector(s) with free sector(s)
FREE_SECTOR free = new FREE_SECTOR(drive.Disk.BytesPerSector);
int dataSectorAt = sector.FirstDataAt;
while (dataSectorAt != 0)
{
// Read the data sector om and save nextSectorAt
DATA_SECTOR dataSector = DATA_SECTOR.CreateFromBytes(drive.Disk.ReadSector(dataSectorAt));
int nextDataSectorAt = dataSector.NextSectorAt;
// Replace it
drive.Disk.WriteSector(dataSectorAt, free.RawBytes);
// Next one
dataSectorAt = nextDataSectorAt;
}
// Replace node sector with free sector
drive.Disk.WriteSector(nodeSector, free.RawBytes);
// Remove ourself from our parent and commit paren'ts list of children
parent.LoadChildren();
parent.children.Remove(Name);
parent.CommitChildren();
}
public void Delete()
{
// make sectors free!
// wipe this node and sector(s) from the disk
// remove this node from the virtual directory children list and commit to disk
// if this is a file, then nuke its node sector and data sectors
if (IsFile)
{
LoadBlocks();
foreach (VirtualBlock vb in blocks)
{
vb.DeleteBlock();
}
// empty the cache
blocks = null;
}
// if directory, nuke just the node sector, Data sector, and children
if (IsDirectory)
{
LoadChildren();
foreach (VirtualNode vn in children.Values.ToList())
{
vn.Delete();
}
children = null;
// Delete data sector
FREE_SECTOR freeData = new FREE_SECTOR(drive.Disk.BytesPerSector);
drive.Disk.WriteSector(sector.FirstDataAt, freeData.RawBytes);
}
// remove this node from parent directory
parent.LoadChildren();
parent.children.Remove(Name);
parent.CommitChildren();
// Finally, free this nodes NODE_SECTOR
FREE_SECTOR free = new FREE_SECTOR(drive.Disk.BytesPerSector);
drive.Disk.WriteSector(nodeSector, free.RawBytes);
}
public void DeleteBlock()
{
FREE_SECTOR free = new FREE_SECTOR(drive.Disk.BytesPerSector);
drive.Disk.WriteSector(sectorAddress, free.RawBytes);
}
