public override int CompareTo(object obj)
{
XmlStringSortKey that = obj as XmlStringSortKey;
int idx, cntCmp, result;
if (that == null)
{
return(CompareToEmpty(obj));
}
// Compare either using SortKey.Compare or byte arrays
if (_sortKey != null)
{
Debug.Assert(that._sortKey != null, "Both keys must have non-null sortKey field");
result = SortKey.Compare(_sortKey, that._sortKey);
}
else
{
Debug.Assert(_sortKeyBytes != null && that._sortKeyBytes != null, "Both keys must have non-null sortKeyBytes field");
cntCmp = (_sortKeyBytes.Length < that._sortKeyBytes.Length) ? _sortKeyBytes.Length : that._sortKeyBytes.Length;
for (idx = 0; idx < cntCmp; idx++)
{
if (_sortKeyBytes[idx] < that._sortKeyBytes[idx])
{
result = -1;
goto Done;
}
if (_sortKeyBytes[idx] > that._sortKeyBytes[idx])
{
result = 1;
goto Done;
}
}
// So far, keys are equal, so now test length of each key
if (_sortKeyBytes.Length < that._sortKeyBytes.Length)
{
result = -1;
}
else if (_sortKeyBytes.Length > that._sortKeyBytes.Length)
{
result = 1;
}
else
{
result = 0;
}
}
Done:
// Use document order to break sorting tie
if (result == 0)
{
return(BreakSortingTie(that));
}
return(_descendingOrder ? -result : result);
}
