//TODO: align copy plan with file map in disk image
private static List <FileExtent> CreateCopyPlan(DiskImage image, IPartitioningInfo partInfo)
{
//TODO: figure out if it possible to quickly zero the whole disk so we can skip writing zero blocks.
//Using allocation bitmap from the disk image will speed thing up if the disk is sparse.
//However not writing zeros can cause data corruption.
var diskImageBitmap = new BitArray((int)(image.Length / SECTOR_SIZE), true);
if (partInfo != null)
{
var partBitmap = GetAllocationBitmap(image.Length, partInfo.Partitions);
diskImageBitmap = diskImageBitmap.And(partBitmap);
}
var ret = new List <FileExtent>();
long startLba = -1;
long currentLba;
for (currentLba = 0; currentLba < diskImageBitmap.Length; currentLba++)
{
if (startLba != -1 && (currentLba - startLba) >= MAX_CHUNK_LBAS)
{
ret.Add(new FileExtent(startLba * SECTOR_SIZE, (currentLba - startLba) * SECTOR_SIZE));
startLba = -1;
}
if (diskImageBitmap[checked ((int)currentLba)])
{
if (startLba == -1)
{
startLba = currentLba;
}
}
else if (startLba != -1)
{
ret.Add(new FileExtent(startLba * SECTOR_SIZE, (currentLba - startLba) * SECTOR_SIZE));
startLba = -1;
}
}
if (startLba != -1)
{
long offset = startLba * SECTOR_SIZE;
ret.Add(new FileExtent(offset, image.Length - offset));
}
return(ret);
}
static bool getParitionInfo(DiskImage image, out IPartitioningInfo info)
{
GptPartitioningInfo gpt;
if (GptPartitioningInfo.TryGetGptInfo(image, out gpt))
{
info = gpt;
return(true);
}
MbrPartitioningInfo mbr;
if (MbrPartitioningInfo.TryGetMbrInfo(image, out mbr))
{
info = mbr;
return(true);
}
info = null;
return(false);
}
