otel-collector/internal/common/fingerprint/hash.go

package fingerprint

const (
	InitialOffset uint64 = 14695981039346656037
	prime64       uint64 = 1099511628211
	separatorByte byte   = 255
)

// hashAdd adds a string to a fnv64a hash value, returning the updated hash.
func hashAdd(h uint64, s string) uint64 {
	for i := 0; i < len(s); i++ {
		h ^= uint64(s[i])
		h *= prime64
	}
	return h
}

// hashAddByte adds a byte to a fnv64a hash value, returning the updated hash.
func hashAddByte(h uint64, b byte) uint64 {
	h ^= uint64(b)
	h *= prime64
	return h
}