private void BoundsCheck(SequencePosition start, SequencePosition position)
{
int startIndex = start.Index;
int endIndex = position.Index;
SequenceType type = GetSequenceType();
startIndex = GetIndex(startIndex);
endIndex = GetIndex(endIndex);
switch (type)
{
case SequenceType.OwnedMemory:
case SequenceType.Array:
if (endIndex > startIndex)
{
ThrowHelper.ThrowArgumentOutOfRangeException_PositionOutOfRange();
}
return;
case SequenceType.MemoryList:
IMemoryList <T> segment = (IMemoryList <T>)position.Segment;
IMemoryList <T> memoryList = (IMemoryList <T>)start.Segment;
if (segment.RunningIndex - startIndex > memoryList.RunningIndex - endIndex)
{
ThrowHelper.ThrowArgumentOutOfRangeException_PositionOutOfRange();
}
return;
default:
ThrowHelper.ThrowInvalidOperationException_UnexpectedSegmentType();
return;
}
}
