func validateHashRanges()

in pulsar/key_shared_policy.go [80:107]

• 26 lines of code
• 11 McCabe index (conditional complexity)

func validateHashRanges(hashRanges []int) error {
	sz := len(hashRanges)
	if sz == 0 || sz%2 != 0 {
		return fmt.Errorf("ranges must not be empty or not in value pairs")
	}
	var x1, x2, y1, y2 int
	//check that the ranges are well-formed
	for i := 0; i < sz; i += 2 {
		x1, x2 = hashRanges[i], hashRanges[i+1]
		if x1 >= x2 || x1 < 0 || x2 > 65535 {
			return fmt.Errorf("ranges must be in [0, 65535], but provided range is, %d - %d", x1, x2)
		}
	}
	//loop again for checking range overlap
	for i := 0; i < sz; i += 2 {
		x1, x2 = hashRanges[i], hashRanges[i+1]
		for j := 0; j < sz; j += 2 {
			if j == i {
				continue
			}
			y1, y2 = hashRanges[j], hashRanges[j+1]
			if x1 <= y2 && y1 <= x2 {
				return fmt.Errorf("ranges with overlap between, %d - %d, and %d - %d", x1, x2, y1, y2)
			}
		}
	}
	return nil
}