hash := hashPath(path)
	if d.Cache == nil {
		d.Cache = make(map[string]dataUsageEntry, 100)
	}
	d.Cache[hash.Key()] = e
	if parent != "" {
		phash := hashPath(parent)
		p := d.Cache[phash.Key()]
		p.addChild(hash)
		d.Cache[phash.Key()] = p
	}
}

// replaceHashed add or replaces an entry to the cache based on its hash.
// If a parent is specified it will be added to that if not already there.

seed []byte, keyLen int) []byte { labelAndSeed := make([]byte, len(label)+len(seed)) copy(labelAndSeed, label) copy(labelAndSeed[len(label):], seed) result := make([]byte, keyLen) pHash(hash, result, secret, labelAndSeed) return result } // pHash implements the P_hash function, as defined in RFC 5246, Section 5. func pHash[H hash.Hash](hash func() H, result, secret, seed []byte) { h := hmac.New(hash, secret) h.Write(seed) a := h.Sum(nil) for len(result) > 0 { h.Reset() h.Write(a) h.Write(seed) b :=...