private void CommitChildren()
{
if (children != null)
{
// Create empty byte array
byte[] childListBytes = new byte[DATA_SECTOR.MaxDataLength(drive.Disk.BytesPerSector)];
int i = 0;
foreach (VirtualNode childNode in children.Values)
{
int childAddress = childNode.nodeSector;
BitConverter.GetBytes(childAddress).CopyTo(childListBytes, i * 4);
i++;
}
DATA_SECTOR data = new DATA_SECTOR(drive.Disk.BytesPerSector, 0, childListBytes);
drive.Disk.WriteSector(sector.FirstDataAt, data.RawBytes);
// Update entry count
(sector as DIR_NODE).EntryCount = children.Count;
// save the entry count
drive.Disk.WriteSector(nodeSector, sector.RawBytes);
}
}
private DRIVE_INFO sector; // caching entire sector for now
public VirtualDrive(DiskDriver disk, int driveInfoSector, DRIVE_INFO sector)
{
this.disk = disk;
this.driveInfoSector = driveInfoSector;
this.bytesPerDataSector = DATA_SECTOR.MaxDataLength(disk.BytesPerSector);
this.sector = sector;
}
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);
}