public static void ExtendBlocks(VirtualDrive drive, List <VirtualBlock> blocks, int initialFileLength, int finalFileLength)
{
int initialSectorcount = BlocksNeeded(drive, initialFileLength);
int finalSectorcount = BlocksNeeded(drive, finalFileLength);
if (finalSectorcount > initialSectorcount)
{
int[] freeSectors = drive.GetNextFreeSectors(finalSectorcount - initialSectorcount);
DATA_SECTOR dataSector = blocks.Last().Sector;
foreach (int freeSector in freeSectors)
{
int currentSector = dataSector.NextSectorAt = freeSector;
dataSector = new DATA_SECTOR(drive.Disk.BytesPerSector, 0, null);
blocks.Add(new VirtualBlock(drive, currentSector, dataSector, true));
}
}
}
private VirtualNode CommonMake(string name, bool makeFile = true)
{
if (mSector.Type != SECTOR.SectorType.DIR_NODE)
{
throw new Exception($"Cannot create Dir/File under node type " + mSector.Type.ToString());
}
LoadChildren();
if (mChildren.ContainsKey(name))
{
throw new Exception("Name already in use!");
}
int[] nextFreeSectors = mDrive.GetNextFreeSectors(2);
int nodeAddr = nextFreeSectors[0];
int dataAddr = nextFreeSectors[1];
NODE newNode = null;
if (makeFile)
{
newNode = new FILE_NODE(mDrive.Disk.BytesPerSector, dataAddr, name, 0);
}
else
{
newNode = new DIR_NODE(mDrive.Disk.BytesPerSector, dataAddr, name, 0);
}
DATA_SECTOR dirdata = new DATA_SECTOR(mDrive.Disk.BytesPerSector, 0, null);
mDrive.Disk.WriteSector(nodeAddr, newNode.RawBytes);
mDrive.Disk.WriteSector(dataAddr, dirdata.RawBytes);
VirtualNode child = new VirtualNode(mDrive, nodeAddr, newNode, this);
mChildren[name] = child;
CommitChildren();
return(child);
}