kopia lustrzana https://github.com/f4exb/sdrangel
86 wiersze
2.7 KiB
C++
86 wiersze
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018-2019 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRBASE_UTIL_LIMITEDCOUNTER_H_
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#define SDRBASE_UTIL_LIMITEDCOUNTER_H_
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#include <stdint.h>
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template<typename StoreType, uint32_t Limit>
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class LimitedCounter
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{
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public:
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LimitedCounter() :
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m_counter(0)
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{}
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LimitedCounter(StoreType value) :
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m_counter(value < Limit ? value : Limit - 1)
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{}
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void operator=(const LimitedCounter& rhs) {
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m_counter = rhs.m_counter;
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}
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LimitedCounter& operator++() {
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m_counter++;
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if (m_counter >= Limit) {
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m_counter = 0;
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}
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return *this;
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}
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LimitedCounter operator++(int) {
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LimitedCounter temp = *this ;
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m_counter++;
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if (m_counter >= Limit) {
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m_counter = 0;
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}
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return temp;
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}
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LimitedCounter& operator+=(const uint32_t rhs) {
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m_counter += rhs;
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if (m_counter >= Limit) {
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m_counter -= Limit;
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}
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return *this;
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}
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StoreType value() const { return m_counter; }
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friend LimitedCounter operator-(const LimitedCounter lhs, const LimitedCounter& rhs)
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{
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LimitedCounter result;
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if (lhs.m_counter < rhs.m_counter) {
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result.m_counter = Limit - lhs.m_counter + rhs.m_counter + 1;
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} else {
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result.m_counter = lhs.m_counter - rhs.m_counter;
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}
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return result;
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}
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private:
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StoreType m_counter;
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};
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#endif /* SDRBASE_UTIL_LIMITEDCOUNTER_H_ */
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