live_set.h

/*
   Copyright 2020 František Bráblík
 
   Licensed 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.
*/
#pragma once
 
#include <vector>
#include <algorithm> // set functions
#include <iterator> // set functions
 
namespace dyng {
 
namespace detail {
 
 
class live_set {
public:
    void add(unsigned time) {
        m_values.push_back(time);
    }
 
    live_set intersection(const live_set& other) const {
        live_set result;
        std::set_intersection(m_values.begin(), m_values.end(),
                other.m_values.begin(), other.m_values.end(),
                std::back_inserter(result.m_values));
        return result;
    }
 
    live_set setunion(const live_set& other) const {
        live_set result;
        std::set_union(m_values.begin(), m_values.end(),
                other.m_values.begin(), other.m_values.end(),
                std::back_inserter(result.m_values));
        return result;
    }
 
    // adds all values from other to this
    void join(const live_set& other) {
        m_values = setunion(other).m_values;
    }
 
    bool empty() const { return m_values.empty(); }
 
private:
    std::vector<unsigned> m_values;
};
 
} // namespace detail
 
} // namespace dyng