/* mbed Microcontroller Library * Copyright (c) 2006-2020 ARM Limited * * SPDX-License-Identifier: Apache-2.0 * * 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 BLE_COMMON_BOUNDED_H_ #define BLE_COMMON_BOUNDED_H_ #include <cstdint> namespace ble { /** * Restrict values of an integer type to a defined range. * * The range is a closed interval that includes its left-bound (Min) and * right-bound value (Max). * * @tparam Rep The C++ integer type used to represent the values. * @tparam Min Minimum value allowed. * @tparam Max Maximum value allowed. */ template<typename Rep, Rep Min, Rep Max> struct Bounded { /** * Construct a bounded integer. * * If v is out of the range [Min : Max], then if it is less than Min, the * value of the bounded integer will be Min. If it greater than Max, then * the value of the bounded integer will be Max. * * @param v The value to store. */ Bounded(Rep v) : _value(v) { if (v < Min) { _value = Min; } else if (v > Max) { _value = Max; } } /** * Access the inner value. * * @return The current value. */ Rep value() const { return _value; } /** * The left-bound value. * * @return The lowest value that this type can represent */ static Rep min() { return Min; } /** * The right-bound value. * * @return The highest value that this type can represent */ static Rep max() { return Max; } /** * The left-bound value. */ static const Rep MIN = Min; /** * The right-bound value. */ static const Rep MAX = Max; private: Rep _value; }; /* ---------------------- Static variable initialization -------------------- */ template<typename T, T Min, T Max> const T Bounded<T, Min, Max>::MIN; template<typename T, T Min, T Max> const T Bounded<T, Min, Max>::MAX; } // namespace ble #endif //BLE_COMMON_BOUNDED_H_