// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package socket

// hashSet is a simple set built upon a map.
type hashSet map[uint64]struct{}

// Add adds a value to the set.
func (s hashSet) Add(hash uint64) {
	s[hash] = struct{}{}
}

// Contains return true if the value is in the set.
func (s hashSet) Contains(hash uint64) bool {
	_, exists := s[hash]
	return exists
}

// Reset resets the contents of the set to empty and returns itself.
func (s hashSet) Reset() hashSet {
	for k := range s {
		delete(s, k)
	}
	return s
}