func()

in pkg/profiling/task/network/analyze/buffer/buffer.go [229:271]

• 40 lines of code
• 9 McCabe index (conditional complexity)

func (r *Buffer) OffsetPosition(offset int) *Position {
	var nextElement func(e *list.Element) *list.Element
	if offset == 0 {
		return r.current.Clone()
	} else if offset > 0 {
		nextElement = func(e *list.Element) *list.Element {
			return e.Next()
		}
	} else {
		nextElement = func(e *list.Element) *list.Element {
			return e.Prev()
		}
	}

	var curEle = r.current.element
	var curIndex = r.current.bufIndex
	for ; curEle != nil; curEle = nextElement(curEle) {
		nextOffset := curIndex + offset
		bufferLen := curEle.Value.(events.SocketDataBuffer).BufferLen()
		if nextOffset >= 0 && nextOffset < bufferLen {
			curIndex += offset
			break
		}

		if offset > 0 {
			offset -= bufferLen - curIndex
			curIndex = 0
		} else {
			offset += curIndex
			next := nextElement(curEle)
			if next == nil {
				curEle = next
				break
			}
			curIndex = curEle.Value.(events.SocketDataBuffer).BufferLen()
		}
	}

	if curEle == nil {
		return nil
	}
	return &Position{element: curEle, bufIndex: curIndex}
}