public void DefragFile(string path, TextWriter log)
{
log.WriteLine("Looking at: " + path);
if (!(new FileInfo(path).Exists))
{
log.WriteLine("File no longer exists");
return;
}
FileLayout layout = new FileLayout(fileSystem.GetFileMap(path));
if (free_space_map == null)
{
log.WriteLine("Updating free space map");
UpdateFreeSpaceMap();
}
try
{
DefragFile(path, layout, log);
}
catch (Exception)
{
free_space_map = null;
throw;
}
}
private void DefragFile(string path, FileLayout layout, TextWriter log)
{
if (layout.Fragments() <= 1)
{
log.WriteLine("Skipped, does not require defrag.");
return;
}
uint file_length = layout.Length();
ulong free_space_position = free_space_map.FindFreeSpan(file_length);
if (free_space_position == UInt64.MaxValue)
{
log.WriteLine("Skipped, could not find a big enough span of free space.");
return;
}
fileSystem.MoveFile(path, 0, free_space_position, file_length);
free_space_map.Allocate(free_space_position, file_length);
log.WriteLine("Defrag successfull.");
}
