84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2021 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_INVERT_INCLUDED
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#define ETL_INVERT_INCLUDED
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#include "platform.h"
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#include "functional.h"
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#include "limits.h"
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#include <stdint.h>
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namespace etl
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{
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//***************************************************************************
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/// Invert.
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//***************************************************************************
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template<typename TInput>
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class invert : public etl::unary_function<TInput, TInput>
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{
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public:
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//*****************************************************************
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// Constructor.
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//*****************************************************************
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invert()
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: offset(TInput(0))
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, minuend((etl::numeric_limits<TInput>::is_signed) ? TInput(0) : etl::numeric_limits<TInput>::max())
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{
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}
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//*****************************************************************
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// Constructor.
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//*****************************************************************
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invert(TInput offset_, TInput minuend_)
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: offset(offset_)
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, minuend(minuend_)
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{
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}
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//*****************************************************************
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// operator ()
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//*****************************************************************
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TInput operator ()(TInput value) const
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{
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return minuend - (value - offset);
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}
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private:
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const TInput offset;
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const TInput minuend;
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};
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}
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#endif
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