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//
// $Id$
//
//
// Original author: Darren Kessner <darren@proteowizard.org>
//
// Copyright 2009 Center for Applied Molecular Medicine
// University of Southern California, Los Angeles, California
//
// 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 _ALMOST_EQUAL_HPP_
#define _ALMOST_EQUAL_HPP_
#include <limits>
#include <cmath>
namespace pwiz {
namespace util {
template <typename float_type>
bool almost_equal(float_type a, float_type b, int multiplier = 1)
{
float_type scale = a==float_type(0.0) ? float_type(1.0) : a;
return std::abs((a-b)/scale) < float_type(multiplier) * std::numeric_limits<float_type>::epsilon();
}
} // namespace util
} // namespace pwiz
#endif // _ALMOST_EQUAL_HPP_
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