func()

in internal/httprange/http_reader.go [156:184]

• 21 lines of code
• 6 McCabe index (conditional complexity)

func (r *Reader) Seek(offset int64, whence int) (int64, error) {
	var newOffset int64

	switch whence {
	case io.SeekStart:
		newOffset = r.rangeStart + offset

	case io.SeekCurrent:
		newOffset = r.offset + offset

	case io.SeekEnd:
		newOffset = r.rangeStart + r.rangeSize + offset

	default:
		return 0, errSeekInvalidWhence
	}

	if newOffset < r.rangeStart || newOffset > r.rangeStart+r.rangeSize {
		return 0, errSeekOutsideRange
	}

	if newOffset != r.offset {
		// recycle r.res
		r.Close()
	}

	r.offset = newOffset
	return newOffset - r.rangeStart, nil
}