System.Xml.XmlBufferReader.SetWindow C# (CSharp) Méthode

        public void SetWindow(int windowOffset, int windowLength)
        {
            // [0...elementOffset-1][elementOffset..offset][offset..offsetMax-1][offsetMax..buffer.Length]
            // ^--Elements, Attributes in scope
            //                      ^-- The node just consumed
            //                                             ^--Data buffered, not consumed
            //                                                                  ^--Unused space
            if (windowOffset > int.MaxValue - windowLength)
                windowLength = int.MaxValue - windowOffset;

            if (_offset != windowOffset)
            {
                System.Buffer.BlockCopy(_buffer, _offset, _buffer, windowOffset, _offsetMax - _offset);
                _offsetMax = windowOffset + (_offsetMax - _offset);
                _offset = windowOffset;
            }
            _windowOffset = windowOffset;
            _windowOffsetMax = Math.Max(windowOffset + windowLength, _offsetMax);
        }