private long GetTxAddress()
{
long oldAddress = -1;
byte oldCheck = 0;
while (true)
{
var address = _data.ReadInt64(0);
var check = _data.ReadByte(8);
if (address == oldAddress && check == oldCheck)
{
throw new NFSdbInvalidTxAddressException(address,
"Check sum does not match address value and does not change on re-read");
}
var actual = GetCheckByte(address);
if (actual == check)
{
return(address);
}
oldAddress = address;
oldCheck = check;
}
}
public IEnumerable <long> GetValues(int hashKey, PartitionTxData tx)
{
var keyRecOffset = _indexAddress.ReadOnlyKeyRecordOffset(hashKey, tx);
if (keyRecOffset < 0)
{
yield break;
}
var blockOffset = _kData.ReadInt64(keyRecOffset);
var rowCount = _kData.ReadInt64(keyRecOffset + 8);
// Key found.
var rowBlockSize = _indexAddress.RowBlockSize;
var rowBlockCount = (int)(rowCount >> _rowBlockLenBitHint) + 1;
var len = (int)(rowCount & (_rowBlockLen - 1));
if (len == 0)
{
rowBlockCount--;
len = _rowBlockLen;
}
var rowBlockOffset = blockOffset;
var partMaxRowId = tx.NextRowID;
// Loop blocks.
for (int i = rowBlockCount - 1; i >= 0; i--)
{
// Loop cells.
for (int k = len - 1; k >= 0; k--)
{
var rowid = _rData.ReadInt64(rowBlockOffset - rowBlockSize + k * 8);
// yield return rowid;
// Check data visible.
if (partMaxRowId < 0 || rowid < partMaxRowId)
{
yield return(rowid);
}
}
// Next block.
rowBlockOffset = _rData.ReadInt64(rowBlockOffset - 8);
len = _rowBlockLen;
}
}
public byte[] GetBytes(long rowID, ReadContext readContext)
{
var beginOffset = _index.ReadInt64(rowID * MetadataConstants.STRING_INDEX_FILE_RECORD_SIZE);
if (beginOffset == MetadataConstants.INDEX_NULL_DATA_VALUE)
{
return(null);
}
var arrayLength = ReadLength(_data, beginOffset);
if (arrayLength == 0)
{
return(EMPTY_BYTE_ARRAY);
}
//var byteArray = readContext.AllocateByteArray2(arrayLength);
var byteArray = new byte[arrayLength];
_data.ReadBytes(beginOffset + HEADER_SIZE, byteArray, 0, arrayLength);
return(byteArray);
}
public long GetInt64(long rowID)
{
return(_storage.ReadInt64(rowID * _sizeBytes));
}
