mirror of https://gitee.com/bigwinds/arangodb
128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief utilities for figures
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2010-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_STATISTICS_FIGURES_H
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#define ARANGODB_STATISTICS_FIGURES_H 1
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#include "Basics/Common.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- public types
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// -----------------------------------------------------------------------------
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namespace triagens {
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namespace basics {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief vector generator
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////////////////////////////////////////////////////////////////////////////////
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struct StatisticsVector {
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StatisticsVector ()
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: _value() {
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}
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StatisticsVector& operator<< (double v) {
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_value.push_back(v);
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return *this;
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}
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std::vector<double> _value;
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};
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////////////////////////////////////////////////////////////////////////////////
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/// @brief a simple counter
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////////////////////////////////////////////////////////////////////////////////
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struct StatisticsCounter {
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StatisticsCounter()
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: _count(0) {
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}
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void incCounter () {
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++_count;
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}
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void decCounter () {
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--_count;
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}
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int64_t _count;
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};
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////////////////////////////////////////////////////////////////////////////////
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/// @brief a distribution with count, min, max, mean, and variance
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////////////////////////////////////////////////////////////////////////////////
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struct StatisticsDistribution {
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StatisticsDistribution ()
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: _count(0), _total(0.0), _cuts(), _counts() {
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}
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StatisticsDistribution (StatisticsVector const& dist)
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: _count(0), _total(0.0), _cuts(dist._value), _counts() {
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_counts.resize(_cuts.size() + 1);
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}
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void addFigure (double value) {
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++_count;
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_total += value;
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std::vector<double>::iterator i = _cuts.begin();
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std::vector<uint64_t>::iterator j = _counts.begin();
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for (; i != _cuts.end(); ++i, ++j) {
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if (value < *i) {
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++(*j);
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return;
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}
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}
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++(*j);
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}
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uint64_t _count;
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double _total;
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std::vector<double> _cuts;
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std::vector<uint64_t> _counts;
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};
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}
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}
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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