QuantileEstimator.cpp

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/*
 * Copyright 2018-present Facebook, Inc.
 *
 * 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.
 */

#include <folly/stats/QuantileEstimator-defs.h>

namespace folly {
namespace detail {

QuantileEstimates estimatesFromDigest(
    const TDigest& digest,
    Range<const double*> quantiles) {
  QuantileEstimates result;
  result.quantiles.reserve(quantiles.size());
  result.sum = digest.sum();
  result.count = digest.count();
  for (auto it = quantiles.begin(); it != quantiles.end(); ++it) {
    result.quantiles.push_back(
        std::make_pair(*it, digest.estimateQuantile(*it)));
  }
  return result;
}

} // namespace detail

template class SimpleQuantileEstimator<std::chrono::steady_clock>;
template class SlidingWindowQuantileEstimator<std::chrono::steady_clock>;

} // namespace folly