1// Copyright 2017 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef BASE_NUMERICS_RANGES_H_ 6#define BASE_NUMERICS_RANGES_H_ 7 8#include <algorithm> 9#include <cmath> 10 11namespace base { 12 13// To be replaced with std::clamp() from C++17, someday. 14template <class T> 15constexpr const T& ClampToRange(const T& value, const T& min, const T& max) { 16 return std::min(std::max(value, min), max); 17} 18 19template <typename T> 20constexpr bool IsApproximatelyEqual(T lhs, T rhs, T tolerance) { 21 static_assert(std::is_arithmetic<T>::value, "Argument must be arithmetic"); 22 return std::abs(rhs - lhs) <= tolerance; 23} 24 25} // namespace base 26 27#endif // BASE_NUMERICS_RANGES_H_ 28