public BlockStreamWriter(FragmentedFile file, long ordinal)
: this(file)
{
_current = _first = new FileBlock(file._blockSize, file._useAlignedIo);
_file.ReadBlock(ordinal, _current, file._blockSize, BlockFlags.ExternalBlock);
if ((_current.Flags & BlockFlags.ExternalBlock) != BlockFlags.ExternalBlock)
{
throw new InvalidOperationException();
}
if ((_current.Flags & BlockFlags.Temporary) == BlockFlags.Temporary)
{
_isNew = true;
_restore = null;
_current.Flags &= ~BlockFlags.Temporary;
}
else
{
_isNew = false;
_restore = _current.Clone();
_current.NextBlockId = 0;
}
_current.Length = 0;
}
public BlockStreamWriter(FragmentedFile file, FileBlock block)
: this(file)
{
_current = _first = block;
_current.Flags &= ~BlockFlags.Temporary;
_restore = null;
_temp = null;
_isNew = true;
}
public BlockStreamReader(FragmentedFile file, long ordinal, BlockFlags typeExpected, bool validated)
{
_file = file;
_blockPos = 0;
_validated = validated;
_block = new FileBlock(file._blockSize, file._useAlignedIo);
_file.ReadBlock(ordinal, _block, file._blockSize, typeExpected, _validated);
if (_validated)
{
_expectedSum = _block.CheckSum;
_checksum = new Crc32();
_checksum.Add(_block.BlockData, _block.DataOffset, _block.Length);
if (_block.NextBlockId == 0 && _checksum != _expectedSum)
{
throw new InvalidDataException();
}
}
}
private BlockStreamWriter(FragmentedFile file)
{
_file = file;
_checksum = new Crc32();
_saved = _reverted = false;
}
public BlockStreamReader(FragmentedFile file, long ordinal)
: this(file, ordinal, BlockFlags.ExternalBlock, true)
{
}
public BlockStreamWriter(FragmentedFile file, long ordinal)
: this(file)
{
_current = _first = new FileBlock(file._blockSize, file._useAlignedIo);
_file.ReadBlock(ordinal, _current, file._blockSize, BlockFlags.ExternalBlock);
if ((_current.Flags & BlockFlags.ExternalBlock) != BlockFlags.ExternalBlock)
throw new InvalidOperationException();
if ((_current.Flags & BlockFlags.Temporary) == BlockFlags.Temporary)
{
_isNew = true;
_restore = null;
_current.Flags &= ~BlockFlags.Temporary;
}
else
{
_isNew = false;
_restore = _current.Clone();
_current.NextBlockId = 0;
}
_current.Length = 0;
}
public BlockStreamWriter(FragmentedFile file, FileBlock block)
: this(file)
{
_current = _first = block;
_current.Flags &= ~BlockFlags.Temporary;
_restore = null;
_temp = null;
_isNew = true;
}
private BlockStreamWriter(FragmentedFile file)
{
_file = file;
_checksum = new Crc32();
_saved = _reverted = false;
}
public BlockStreamReader(FragmentedFile file, long ordinal, BlockFlags typeExpected, bool validated)
{
_file = file;
_blockPos = 0;
_validated = validated;
_block = new FileBlock(file._blockSize, file._useAlignedIo);
_file.ReadBlock(ordinal, _block, file._blockSize, typeExpected, _validated);
if (_validated)
{
_expectedSum = _block.CheckSum;
_checksum = new Crc32();
_checksum.Add(_block.BlockData, _block.DataOffset, _block.Length);
if (_block.NextBlockId == 0 && _checksum != _expectedSum)
throw new InvalidDataException();
}
}
public BlockStreamReader(FragmentedFile file, long ordinal)
: this(file, ordinal, BlockFlags.ExternalBlock, true)
{ }