libcruft-util/stats.cpp

89 lines
2.1 KiB
C++

/*
* 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.
*
* Copyright 2010 Danny Robson <danny@nerdcruft.net>
*/
#include "stats.hpp"
#include <limits>
#include <ostream>
template <typename T>
util::stats::accumulator<T>::accumulator () {
reset ();
}
template <typename T>
void
util::stats::accumulator<T>::reset (void) {
count = 0;
min = std::numeric_limits<T>::max ();
max = std::numeric_limits<T>::min ();
sum = 0;
}
template <typename T>
void
util::stats::accumulator<T>::add (T val) {
min = std::min (val, min);
max = std::max (val, max);
sum += val;
++count;
}
template <typename T>
void
util::stats::accumulator<T>::add (const accumulator<T> &rhs) {
min = std::min (rhs.min, min);
max = std::max (rhs.max, max);
sum += rhs.sum;
count += rhs.count;
}
template <typename T>
T
util::stats::accumulator<T>::range (void) const
{ return max - min; }
template <typename T>
T
util::stats::accumulator<T>::mean (void) const
{ return sum / count; }
template struct util::stats::accumulator<uint64_t>;
template struct util::stats::accumulator<double>;
template struct util::stats::accumulator<float>;
template <typename T>
std::ostream&
util::stats::operator<< (std::ostream &os, const accumulator<T> &rhs) {
os << "(min: " << rhs.min << ", max: " << rhs.max << ")";
return os;
}
template std::ostream& util::stats::operator<< (std::ostream&, const accumulator<uint64_t> &);
template std::ostream& util::stats::operator<< (std::ostream&, const accumulator<double> &);
template std::ostream& util::stats::operator<< (std::ostream&, const accumulator<float > &);