internal override void PrepareForRead()
{
_batData = new byte[Length];
long fileOffset = _dataStart;
BatEntry entry = new BatEntry();
foreach (Range <long, long> range in _blocks)
{
for (long block = range.Offset; block < range.Offset + range.Count; ++block)
{
long chunk = block / _chunkRatio;
long chunkOffset = block % _chunkRatio;
long batIndex = chunk * (_chunkRatio + 1) + chunkOffset;
entry.FileOffsetMB = fileOffset / Sizes.OneMiB;
entry.PayloadBlockStatus = PayloadBlockStatus.FullyPresent;
entry.WriteTo(_batData, (int)(batIndex * 8));
fileOffset += _blockSize;
}
}
}
public PayloadBlockStatus AllocateSpaceForBlock(int block)
{
bool dataModified = false;
BatEntry blockEntry = new BatEntry(_batData, block * 8);
if (blockEntry.FileOffsetMB == 0)
{
blockEntry.FileOffsetMB = AllocateSpace((int)_fileParameters.BlockSize, false) / Sizes.OneMiB;
dataModified = true;
}
if (blockEntry.PayloadBlockStatus != PayloadBlockStatus.FullyPresent
&& blockEntry.PayloadBlockStatus != PayloadBlockStatus.PartiallyPresent)
{
if ((_fileParameters.Flags & FileParametersFlags.HasParent) != 0)
{
if (!HasSectorBitmap)
{
SectorBitmapPos = AllocateSpace((int)Sizes.OneMiB, true);
}
blockEntry.PayloadBlockStatus = PayloadBlockStatus.PartiallyPresent;
}
else
{
blockEntry.PayloadBlockStatus = PayloadBlockStatus.FullyPresent;
}
dataModified = true;
}
if (dataModified)
{
blockEntry.WriteTo(_batData, block * 8);
_bat.Position = _chunk * (_blocksPerChunk + 1) * 8;
_bat.Write(_batData, 0, (_blocksPerChunk + 1) * 8);
}
return blockEntry.PayloadBlockStatus;
}
internal override void PrepareForRead()
{
_batData = new byte[Length];
long fileOffset = _dataStart;
BatEntry entry = new BatEntry();
foreach(var range in _blocks)
{
for(long block = range.Offset; block < range.Offset + range.Count; ++block)
{
long chunk = block / _chunkRatio;
long chunkOffset = block % _chunkRatio;
long batIndex = (chunk * (_chunkRatio + 1)) + chunkOffset;
entry.FileOffsetMB = fileOffset / Sizes.OneMiB;
entry.PayloadBlockStatus = PayloadBlockStatus.FullyPresent;
entry.WriteTo(_batData, (int)(batIndex * 8));
fileOffset += _blockSize;
}
}
}
