private void ResizeFile(long startBlock, long endBlock)
{
if ((startBlock & _maskVersion) != 0 || (endBlock & _maskVersion) != 0)
{
throw new InvalidDataException();
}
using (FileBlock block = new FileBlock(_blockSize, _useAlignedIo))
using (Stream io = _streamCache.Open(FileAccess.Write))
{
_header.Flags |= BlockFlags.ResizingFile;
_header.NextBlockId = startBlock;
io.Position = 0;
_header.Write(io, FileBlock.HeaderSize);
try
{
block.Clear();
block.Flags = BlockFlags.BlockDeleted;
_nextFree = 0;
for (long ix = endBlock; ix >= startBlock; ix -= _blockSize)
{
block.BlockId = ix;
block.NextBlockId = _nextFree;
_nextFree = block.BlockId;
io.Position = ix & _maskOffset;
block.Write(io, FileBlock.HeaderSize);
}
}
finally
{
_header.Flags &= ~BlockFlags.ResizingFile;
_header.NextBlockId = long.MinValue;
io.Position = 0;
_header.Write(io, FileBlock.HeaderSize);
}
}
}
private void ResizeFile(long startBlock, long endBlock)
{
if ((startBlock & _maskVersion) != 0 || (endBlock & _maskVersion) != 0)
throw new InvalidDataException();
using (FileBlock block = new FileBlock(_blockSize, _useAlignedIo))
using (Stream io = _streamCache.Open(FileAccess.Write))
{
_header.Flags |= BlockFlags.ResizingFile;
_header.NextBlockId = startBlock;
io.Position = 0;
_header.Write(io, FileBlock.HeaderSize);
try
{
block.Clear();
block.Flags = BlockFlags.BlockDeleted;
_nextFree = 0;
for (long ix = endBlock; ix >= startBlock; ix -= _blockSize)
{
block.BlockId = ix;
block.NextBlockId = _nextFree;
_nextFree = block.BlockId;
io.Position = ix & _maskOffset;
block.Write(io, FileBlock.HeaderSize);
}
}
finally
{
_header.Flags &= ~BlockFlags.ResizingFile;
_header.NextBlockId = long.MinValue;
io.Position = 0;
_header.Write(io, FileBlock.HeaderSize);
}
}
}
