internal RegistryValue(RegistryHive hive, ValueCell cell)
{
_hive = hive;
_cell = cell;
}
private RegistryValue AddRegistryValue(string name)
{
byte[] valueList = _hive.RawCellData(_cell.ValueListIndex, _cell.NumValues * 4);
if (valueList == null)
{
valueList = new byte[0];
}
int insertIdx = 0;
while (insertIdx < _cell.NumValues)
{
int valueCellIndex = Utilities.ToInt32LittleEndian(valueList, insertIdx * 4);
ValueCell cell = _hive.GetCell<ValueCell>(valueCellIndex);
if (string.Compare(name, cell.Name, StringComparison.OrdinalIgnoreCase) < 0)
{
break;
}
++insertIdx;
}
// Allocate a new value cell (note _hive.UpdateCell does actual allocation).
ValueCell valueCell = new ValueCell(name);
_hive.UpdateCell(valueCell, true);
// Update the value list, re-allocating if necessary
byte[] newValueList = new byte[(_cell.NumValues * 4) + 4];
Array.Copy(valueList, 0, newValueList, 0, insertIdx * 4);
Utilities.WriteBytesLittleEndian(valueCell.Index, newValueList, insertIdx * 4);
Array.Copy(valueList, insertIdx * 4, newValueList, (insertIdx * 4) + 4, (_cell.NumValues - insertIdx) * 4);
if (_cell.ValueListIndex == -1 || !_hive.WriteRawCellData(_cell.ValueListIndex, newValueList, 0, newValueList.Length))
{
int newListCellIndex = _hive.AllocateRawCell(Utilities.RoundUp(newValueList.Length, 8));
_hive.WriteRawCellData(newListCellIndex, newValueList, 0, newValueList.Length);
if (_cell.ValueListIndex != -1)
{
_hive.FreeCell(_cell.ValueListIndex);
}
_cell.ValueListIndex = newListCellIndex;
}
// Record the new value and save this cell
_cell.NumValues++;
_hive.UpdateCell(_cell, false);
// Finally, set the data in the value cell
return new RegistryValue(_hive, valueCell);
}
