/*
 * Copyright 2012, The Android Open Source Project
 *
 * 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.
 */

#ifndef TIME_SERIES_H_

#define TIME_SERIES_H_

#include <sys/types.h>

namespace android {

struct TimeSeries {
    TimeSeries();

    void add(double val);

    double mean() const;
    double sdev() const;

private:
    enum {
        kHistorySize = 20
    };
    double mValues[kHistorySize];

    size_t mCount;
    double mSum;
};

}  // namespace android

#endif  // TIME_SERIES_H_