mirror of https://github.com/ARMmbed/mbed-os.git
108 lines
2.5 KiB
C++
108 lines
2.5 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2018 ARM Limited
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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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#ifndef BLE_COMMON_BOUNDED_H_
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#define BLE_COMMON_BOUNDED_H_
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#include <stdint.h>
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namespace ble {
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/**
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* Restrict values of an integer type to a defined range.
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*
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* The range is a closed interval that includes its left-bound (Min) and
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* right-bound value (Max).
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*
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* @tparam Rep The C++ integer type used to represent the values.
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* @tparam Min Minimum value allowed.
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* @tparam Max maximum value allowed.
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*/
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template<typename Rep, Rep Min, Rep Max>
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struct Bounded {
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/**
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* Construct a bounded integer.
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*
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* If v is out of the range [Min : Max] then if it is less than Min the
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* value of the bounded integer will be Min and if it greater than Max then
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* the value of the bounded integer will be Max.
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*
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* @param v The value to store.
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*/
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Bounded(Rep v) : _value(v)
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{
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if (v < Min) {
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_value = v;
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} else if (v > Max) {
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_value = v;
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}
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}
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/**
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* Access the inner value.
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*
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* @return The current value.
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*/
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Rep value() const {
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return _value;
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}
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/**
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* The left-bound value.
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*
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* @return The lowest value that can be represented by this type
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*/
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static Rep min()
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{
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return Min;
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}
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/**
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* The right-bound value.
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*
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* @return The highest value that can be represented by this type
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*/
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static Rep max()
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{
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return Max;
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}
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/**
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* The left-bound value.
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*/
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static const Rep MIN = Min;
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/**
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* The right-bound value.
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*/
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static const Rep MAX = Max;
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private:
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Rep _value;
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};
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/* ---------------------- Static variable initialization -------------------- */
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template<typename T, T Min, T Max>
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const T Bounded<T, Min, Max>::MIN;
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template<typename T, T Min, T Max>
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const T Bounded<T, Min, Max>::MAX;
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} // namespace ble
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#endif //BLE_COMMON_BOUNDED_H_
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